[IGSREPORT-27737] Wk 2141 IGS Final Orbits

acc acc at igs.org
Mon Feb 8 00:12:59 UTC 2021


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2141   (Jan 17, 2021 - Jan 23, 2021)

Contacts: acc at igs.org


COMBINATION STRATEGY:
---------------------

Starting with GPS week 860, the IGS Final orbit combination is done directly
in the ITRF without any alignment to the Bulletin B EOP series.

Each centre satellite clock corrections are first transformed to a common 
reference. One of the following two methods can be used (the REMARKS section of
this report gives which method is used):
[1] For each centre, a clock offset and a drift are estimated with respect to
    the broadcast clock corrections using only non-SA satellites;
[2] A chosen reference centre is aligned to the broadcast clock corrections
    using all satellites. All other centres are then aligned to that reference
    centre. 
The offsets and drifts are used to align each centre satellite clock
corrections to GPS time. Ephemerides and clock corrections are then combined
as weighted averages computed over all centres. Each centre is given a
position weight and a clock weight. The position weights are computed from
each centre's absolute deviation to the unweighted average orbit after the
estimation of a 7-parameter Helmert transformation. The clock weights are
either computed from [1] the absolute deviation of the initial alignment to
broadcast clock for the non-SA satellites, or [2] from the absolute deviation
of centre's aligned clock corrections with respect to the unweighted mean.
Finally, a 7-parameter Helmert transformation and clock offset and drift are
estimated for each centre with respect to the combined solutions and parameters
and RMS of fit reported. All the above estimations are performed using the
L1-norm robust scheme.

  Each centre ephemerides are also evaluated individually and independently from
the orbit combination by using week long arcs. The Earth Orientation Parameters
(EOP) used in this evaluation are those submitted by the respective centres.
The IGS combined orbits/clocks and all centres providing both orbit and clock 
solutions are further evaluated by an independent point positioning (navigation)
program that uses both phase and pseudorange data at each SP3 epoch. This is
primarily intended for testing clock solution precision as well as the
orbit/clock consistency.

 Like the clock solutions broadcast in the navigation message, the combined
satellite clocks are corrected for the periodical relativistic correction (see
e.g. GPS interface Control document ICD-GPS-200, p.73):

                              -2*(X.V)/c  [distance unit],

where X and V are the inertial sv state and velocity vectors and c is the speed
of light. Also for compatibility with broadcast GPS time, the IGS clocks use
the linear combination of phase-smoothed P1 and P2 pseudorange data to remove
the 1st order ionospheric delay, with no other delay calibrations applied.


SOFTWARE:
---------

The weighted average software used was originally developed by T. Springer
and G. Beutler in 1993. The GPS long arc orbit analysis software used here for
individual centre ephemeris evaluation was developed by Beutler et al. at the
Astronomical Institute of the University of Bern (AIUB). For more details on
the orbit combination and complete references for both software see:

  Beutler G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS 
  Analysis Centers, Bulletin Geodesique, 69, pp 200-222.

  Kouba J., Mireault Y. and F. Lahaye, 1995, 1994 IGS Orbit/Clock Combination
  and Evaluation, Appendix I of the Analysis Coordinator Report, International
  GPS Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.

  Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1995 Annual Report, 
  pp. 45-76.

  Kouba J. and Y. Mireault, 1997, Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1996 Annual Report, 
  pp. 55-100.


PRODUCTS GENERATED:
-------------------

The resulting average ephemeris and clocks are output to daily files in SP3
format. The satellite accuracy codes displayed in the header are based on the
weighted RMS for each satellite over each daily arc. Note that each file
contains all the satellites that appear in any of the centre ephemeris files.
If a satellite or centre was excluded from combination, a note in the REMARKS
section of this report will identify the exclusion and the reason.

The resulting x and y earth rotation parameters (ERP) associated with the IGS
ephemeris files and their rates (xrt, yrt) are computed using a weighted average
of all available centres (as part of the separate SINEX combination since GPS
week 1051; weighted according to the orbit combination before that time). 

Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
Final IGS solutions. AC LOD biases with respect to Bulletin A are estimated
using Bulletin A most recent 10 days, i.e. up to 5 days prior to the last
non-predicted day of Bulletin A. AC LOD biases are removed and the new AC
bias-free LODs are used to compute a weighted IGS LOD which in turn is
integrated into IGS UT1-UTC. The starting UT1-UTC value is chosen as Bulletin
A fifth day prior to its last non-predicted day. Both IGS LOD and UT1-UTC
values are printed in the IGS Final erp file.



The Final Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:

igs2141[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs2141[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs2141[0-6].cls  IGS GPS clock combination summary report.
igs21417.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs21417.sum      Complete report.

    
REMARKS concerning the IGS Orbit Combination:                                  
---------------------------------------------

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, GRG, MIT, and
    JPL. The other centres are excluded because of poorer consistency, they provide
    broadcast clocks, or clock corrections are not provided (SIO). The clock
    information not used is still compared to the combination for completeness. The
    value of 999999.999999 microseconds, according to the SP3 format convention,
    signifies that no clock solution is available and therefore must not be used.
    
    In general, if an AC does not contribute to the terrestrial reference frame
    (i.e. the SINEX combination), then any corresponding orbits & clocks
    contributed from that AC should not be included with weight in this
    combination. This is done to ensure a high level of consistency between the TRF
    and the orbital frame. However, there is an exception for the clocks if the AC
    is the reference center. In that case, only the clocks from that AC are
    included with weight.
    
    Starting week 1707:
      cod = cof${wwww}[0-6].[clk,snx,sp3] & cod = cof${wwww}7.[erp,sum]

 2. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1582, a new orbit solution from CNES/GRGS (GRG) is included with
    weight. GRG clocks are included with weight starting 12-Aug-2012 (GPS Week
    1701, day 0, MJD 56151), after a procedural change to generate estimates in
    the center-of-figure frame instead of the center-of-mass frame. GRG LOD
    estimates are included for comparison only.

 3. The following centre clock solutions, which provide broadcast clock
    corrections, were excluded from the combination but kept in the combination
    statistics:
             -> Centre: NGS 

 4. The following clock solutions were excluded from the combination because they
    were biasing the combined clock solutions (clock shifts/outliers) but were
    kept for the RMS computation. Duplicate entries can arise due to separate
    combination runs for the 30-s clocks ACs (listed first) and the 5-min clock
    ACs (listed second).
    
               Day | Centre | PRN/STA list
               ----+--------+---------------
                0  |  COD   | 22 22 ADIS ANKR ASCG ASPA AUCK BAKO BJFS BOR1 BRAZ
                0  |  COD   | BRST CHTI CKIS CPVG DAEJ DARW DGAR GLSV GMSD GRAS
                0  |  COD   | GUAT HOFN HYDE INVK KARR KERG KIRI KRGG LHAZ MATE
                0  |  COD   | MAYG NICO NIST NIUM NYA1 NYAL OHI3 PARC PERT REYK
                0  |  COD   | SAVO SCRZ SFER SOFI SSIA STK2 THTI TIXI TLSE TNML
                0  |  COD   | TRO1 TSKB UFPR VOIM WILL WTZR ANKR ASCG ASPA AUCK
                0  |  COD   | BAKO BJFS BOR1 BRAZ BRST CHTI CKIS CPVG DAEJ GLSV
                0  |  COD   | GMSD GRAS GUAT HOFN HYDE INVK KARR KERG KIRI KRGG
                0  |  COD   | LHAZ MATE MAYG NICO NIST NIUM NYA1 NYAL OHI3 PARC
                0  |  COD   | PERT REYK SAVO SCRZ SFER SOFI SSIA STK2 THTI TIXI
                0  |  COD   | TLSE TNML TRO1 TSKB UFPR WILL WTZR
                0  |  EMR   | HOB2 NLIB
                0  |  ESA   | PTBB URUM PTBB URUM
                0  |  GFZ   | 23 23 NYA2 NYA2
                0  |  GRG   | DARW MCM4 SVTL DARW MCM4 SVTL
                1  |  COD   | ASCG ASPA AUCK BAKO BARH BJFS BOR1 BRAZ BRST CCJ2
                1  |  COD   | CHTI CKIS CPVG DAEJ GLSV GMSD GRAS GUAT HOFN HYDE
                1  |  COD   | INVK KARR KERG KIRI KRGG LHAZ MAJU MATE MAYG MDVJ
                1  |  COD   | NICO NIST NIUM NTUS OHI3 PARC PERT REYK RIOP SAVO
                1  |  COD   | SCRZ SFER SOFI SSIA STK2 THTI TIXI TLSE TSKB UFPR
                1  |  COD   | URUM WARK WILL WTZR YAR2 ASCG ASPA AUCK BAKO BARH
                1  |  COD   | BJFS BOR1 BRAZ BRST CCJ2 CHTI CKIS CPVG DAEJ GLSV
                1  |  COD   | GMSD GRAS GUAT HOFN HYDE INVK KARR KERG KIRI KRGG
                1  |  COD   | LHAZ MATE MAYG NICO NIST NIUM NTUS OHI3 PARC PERT
                1  |  COD   | REYK RIOP SAVO SCRZ SFER SOFI SSIA STK2 THTI TIXI
                1  |  COD   | TLSE TSKB UFPR URUM WARK WILL WTZR YAR2
                1  |  EMR   | WTZR WTZR
                1  |  ESA   | PTBB PTBB
                1  |  GFZ   | 23 23 MDVJ NYA2
                1  |  GRG   | DARW SVTL WUH2 ADIS SVTL WUH2
                1  |  MIT   | ZECK
                2  |  COD   | 5 23 5 ASCG ASPA AUCK BAKO BARH BJFS BOR1 BRAZ BRST
                2  |  COD   | CCJ2 CHTI CKIS CPVG DAEJ GLSV GMSD GRAS GUAT HOFN
                2  |  COD   | HYDE INVK KARR KERG KIRI KIRU KRGG LHAZ MAS1 MATE
                2  |  COD   | MAYG NICO NIST NIUM NYA1 NYAL OHI3 PARC PERT REYK
                2  |  COD   | SAVO SCRZ SFER SOFI SSIA THTI TIXI TLSE TRO1 TSKB
                2  |  COD   | UFPR VILL WILL WTZR YAR2 ASCG ASPA AUCK BAKO BARH
                2  |  COD   | BJFS BOR1 BRAZ BRST CCJ2 CHTI CKIS CPVG DAEJ GLSV
                2  |  COD   | GMSD GRAS GUAT HOFN HYDE INVK KARR KERG KIRI KIRU
                2  |  COD   | KRGG LHAZ MAS1 MATE MAYG NICO NIST NIUM NYA1 NYAL
                2  |  COD   | OHI3 PARC PERT REYK SAVO SCRZ SFER SOFI SSIA THTI
                2  |  COD   | TIXI TLSE TRO1 TSKB UFPR VILL WILL WTZR YAR2
                2  |  EMR   | 23
                2  |  ESA   | KIRU MAL2 PTBB TRO1 URUM KIRU MAL2 PTBB TRO1 URUM
                2  |  GFZ   | 23 5 WUH2 HERS WUH2
                2  |  GRG   | 23 5 10 FAA1 HRAG MAS1 MGUE VILL FAA1 HRAG MAS1 VILL
                2  |  JPL   | 10 10
                3  |  COD   | 3 10 3 10 ASCG ASPA AUCK BAKO BARH BJFS BOR1 BRAZ
                3  |  COD   | BRST CCJ2 CHTI CKIS CPVG DAEJ GLSV GMSD GRAS GUAT
                3  |  COD   | HOFN INVK KARR KERG KIRI KIT3 KRGG LHAZ MATE MAYG
                3  |  COD   | NICO NIUM NYA1 NYAL OHI3 PARC PERT REYK RIOP SAVO
                3  |  COD   | SCRZ SCUB SFER SGOC SOFI SSIA THTI TIXI TLSE TRO1
                3  |  COD   | TSKB UFPR URUM USUD WARK WILL WTZR YAR2 ASCG ASPA
                3  |  COD   | AUCK BAKO BARH BJFS BOR1 BRAZ BRST CCJ2 CHTI CKIS
                3  |  COD   | CPVG DAEJ GLSV GMSD GRAS GUAT HOFN INVK KARR KERG
                3  |  COD   | KIRI KRGG LHAZ MATE MAYG NICO NIUM NYA1 NYAL OHI3
                3  |  COD   | PARC PERT REYK RIOP SAVO SCRZ SCUB SFER SOFI SSIA
                3  |  COD   | THTI TIXI TLSE TRO1 TSKB UFPR URUM WARK WILL WTZR
                3  |  COD   | YAR2
                3  |  EMR   | 3 3 MDVJ
                3  |  ESA   | PTBB KIT3 PTBB
                3  |  GRG   | OUS2 OUS2
                3  |  JPL   | SVTL SCUB SVTL
                4  |  COD   | ANKR ASCG ASPA AUCK BARH BJFS BOR1 BRAZ BRST CCJ2
                4  |  COD   | CHTI CKIS CPVG DAEJ DARW GLSV GMSD GRAS GUAT HOFN
                4  |  COD   | INVK JOG2 KARR KIRI KRGG MAR6 MATE MAYG NICO NYA1
                4  |  COD   | NYAL OHI3 PARC PERT REYK SAVO SCRZ SCUB SOFI SSIA
                4  |  COD   | THTI TIXI TLSE TRO1 TSKB UFPR ULAB USUD VOIM WARK
                4  |  COD   | WILL WTZR WUH2 ANKR ASCG ASPA AUCK BARH BJFS BOR1
                4  |  COD   | BRAZ BRST CCJ2 CHTI CKIS CPVG DAEJ GLSV GMSD GRAS
                4  |  COD   | GUAT HOFN INVK KARR KIRI KRGG MATE MAYG NICO NYA1
                4  |  COD   | NYAL OHI3 PARC PERT REYK SAVO SCRZ SOFI SSIA THTI
                4  |  COD   | TIXI TLSE TRO1 TSKB UFPR ULAB WARK WILL WTZR WUH2
                4  |  EMR   | MDVJ MAR6 MDVJ
                4  |  ESA   | PTBB ZECK PTBB
                4  |  GFZ   | ZECK
                4  |  GRG   | MCM4 VOIM MCM4 SVTL VOIM
                4  |  JPL   | BADG MCM4 BADG MCM4
                5  |  COD   | AREG ASCG ASPA AUCK BAKO BARH BJFS BOR1 BRAZ BRST
                5  |  COD   | CCJ2 CHTI CKIS CPVG DAEJ GLSV GMSD GRAS GUAT HOFN
                5  |  COD   | INVK KARR KRGG LHAZ MATE MAYG NICO NIUM NYA1 NYAL
                5  |  COD   | OHI3 PERT REYK SALU SAVO SCRZ SFER SOFI SSIA STK2
                5  |  COD   | THTI TIXI TLSE TRO1 TSKB UFPR WARK WILL WTZR ASCG
                5  |  COD   | ASPA AUCK BAKO BARH BJFS BOR1 BRAZ BRST CCJ2 CHTI
                5  |  COD   | CKIS CPVG DAEJ GLSV GMSD GRAS GUAT HOFN INVK KARR
                5  |  COD   | KRGG LHAZ MATE MAYG NICO NIUM NYA1 NYAL OHI3 PERT
                5  |  COD   | REYK SALU SAVO SCRZ SFER SOFI SSIA STK2 THTI TIXI
                5  |  COD   | TLSE TRO1 TSKB UFPR WARK WILL WTZR
                5  |  ESA   | KIT3 PTBB KIT3 PTBB
                5  |  GFZ   | KIT3 KIT3 KOUR
                5  |  GRG   | 13 13 SVTL SVTL
                5  |  JPL   | BADG BADG
                6  |  COD   | ASCG ASPA AUCK BAKE BAKO BARH BJFS BOR1 BRAZ BRST
                6  |  COD   | CCJ2 CHTI CKIS CPVG DAEJ GLSV GRAS GUAT HOFN INVK
                6  |  COD   | KARR KERG KRGG LHAZ MATE MAYG NICO NIST NIUM NYA1
                6  |  COD   | NYAL OHI3 PARC PERT RBAY REYK SALU SAVO SFER SOFI
                6  |  COD   | SSIA THTI TIXI TLSE TRO1 TSKB UFPR VOIM WARK WILL
                6  |  COD   | WTZR ASCG ASPA AUCK BAKO BARH BJFS BOR1 BRAZ BRST
                6  |  COD   | CCJ2 CHTI CKIS CPVG DAEJ GLSV GRAS GUAT HOFN INVK
                6  |  COD   | KARR KERG KRGG LHAZ MATE MAYG NICO NIST NIUM NYA1
                6  |  COD   | NYAL OHI3 PARC PERT RBAY REYK SALU SAVO SFER SOFI
                6  |  COD   | SSIA THTI TIXI TLSE TRO1 TSKB UFPR WARK WILL WTZR
                6  |  ESA   | PTBB URUM PTBB URUM
                6  |  GFZ   | HERS NYA2 HERS NYA2
                6  |  GRG   | 13 13 ADIS SVTL ADIS SVTL

 5. Starting on 22-Oct-2000 (GPS Week 1085-0; MJD=51839) all IGS clock products
    are based on the new clock combination scheme which uses the clock RINEX
    files as input if available, otherwise SP3 clocks are used. The AC clocks are
    corrected for the radial offsets of their satellite orbits compared to the
    combination.

 6. The following orbit solutions were excluded from the combination because they
    were biasing the weighted average (generally indicated by long arc RMS). They
    were still used for statistics computation.
    
               Day | Centre | PRN list
               ----+--------+---------------
                0  |  SIO   |  14
                1  |  SIO   |  14
                2  |  GRG   |  10
                2  |  MIT   |  23
                2  |  SIO   |  10  14  23
                3  |  SIO   |  14
                4  |  SIO   |  14
                5  |  SIO   |  14
                6  |  SIO   |  14

 7. Velocity changes were estimated to alleviate the effects of modeling problems,
    experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G03 |  4 |    |    |    |    |    |    |
           PRN G10 |  4 |  4 |  4 |    |  4 |    |  4 |

 8. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) all IGS products, including the IGS combined
    orbits, are based on the IGS realization of the ITRF2005 reference frame
    (IGS05). For more information see IGSMAIL #5447. The IGS05 frame is also the
    basis for the homogeneously reprocessed IGS products from GPS Weeks 730 to 1459
    (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products, are
    based on the IGS realization of the ITRF2008 reference frame (IGS08). For more
    information see IGSMAIL #6354.
    
    Starting 07-Oct-2012 (GPS Week 1709, day 0, MJD 56207) all IGS products, are
    based on the updated IGS08 frame (IGb08). For more information see IGSMAIL
    #6663.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) all IGS products,
    are based on the IGS realization of the ITRF2014 reference frame (IGS14).
    For more information see IGSMAIL #7399.
    
    Starting 17-May-2020 (GPS Week 2106, day 0, MJD 58986) all IGS products,
    are based on the updated reference frame (IGb14).
    For more information see IGSMAIL #7921.

 9. Small rotations were applied to all the AC orbit and ERP values in order to
    align them to the current IGS reference frame. These RX, RY and RZ rotations
    were estimated in the IGS SINEX combination process, performed by the IGS
    Reference Frame Coordinator at the Institut Geographique National (IGN).
    Starting on 19-Aug-2012 (GPS Week 1702; MJD=56158), ACs began contributing
    products based on 1d SINEX integrations. As a result, the SINEX combinations
    are now done daily instead of weekly, and the associated daily rotations are
    applied here to the orbits and ERPs. The estimated 7 transformations, from
    which only the 3 rotations are applied to the orbit and ERP values, are:
    
            |     |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre | Day |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+-----+---------------------------------------------------
       COD  |   0 |     .2    -.1     .3       3      4      1    -.29
       EMR  |   0 |    4.7    1.1    5.9     -10     24    -37    -.12
       ESA  |   0 |    -.0   -1.1     .2     -19     12     10    -.21
       GFZ  |   0 |    -.5    -.2     .3      -2      1     14    -.29
       GRG  |   0 |    1.8    2.4   15.5      -7     -2    -26     .08
       JPL  |   0 |    -.2    6.6   11.3       4      2    -12    -.35
       MIT  |   0 |    5.6    2.9   16.9       5    -19     -2    -.13
       NGS  |   0 |   -3.7    4.3    7.4      17    -13     31    -.16
       SIO  |   0 |    6.4    1.6   22.3      -1   -187     38    -.58

       COD  |   1 |     .5     .0     .5       3      5      0    -.28
       EMR  |   1 |    1.5    3.6    7.3      -2     27    -28     .01
       ESA  |   1 |     .6    -.8     .3     -26      6     20    -.05
       GFZ  |   1 |    -.4    -.0     .2       3      2     15    -.14
       GRG  |   1 |    1.7    2.0   19.6      -9     -8    -28    -.05
       JPL  |   1 |    -.3    2.2   11.6       5     -6     -9    -.25
       MIT  |   1 |    6.5    1.6   11.5      12    -12     -3     .11
       NGS  |   1 |   -1.0    7.3    5.3      24    -15     44    -.04
       SIO  |   1 |    4.7    1.9   20.0       0   -144     46    -.35

       COD  |   2 |     .3    -.1     .4       3      6     -5    -.23
       EMR  |   2 |     .3    2.8   11.5      -8     18    -23    -.08
       ESA  |   2 |     .6   -1.1     .3     -17      3      2    -.06
       GFZ  |   2 |    -.3    -.1     .1      -3     -5     16    -.18
       GRG  |   2 |     .4    3.9    8.3      -4     -7    -29    -.03
       JPL  |   2 |   12.1   -1.0    8.6       1      1    -23    -.10
       MIT  |   2 |    8.5    -.0   15.8      10    -21      4     .03
       NGS  |   2 |     .2    3.0    9.9      32    -69     36    -.12
       SIO  |   2 |   19.3   -7.2   29.8    -186   -433      2    -.54

       COD  |   3 |     .2    -.1    -.2      -2      2      0    -.35
       EMR  |   3 |     .5   -4.8   15.4     -12     17    -19     .03
       ESA  |   3 |    -.1   -1.1    -.0     -18     -6     -6    -.12
       GFZ  |   3 |    -.5    -.1     .1       0     -9     15    -.10
       GRG  |   3 |   -1.6    6.3   11.0      -2    -17    -23    -.05
       JPL  |   3 |    5.5    5.0   10.8       6     -1    -30    -.17
       MIT  |   3 |    7.0    1.4   10.6       6    -29      4    -.09
       NGS  |   3 |     .9   -1.9    7.4      26    -46    -11    -.09
       SIO  |   3 |    8.7    1.0   18.3     -20   -233     51    -.47

       COD  |   4 |     .3    -.3     .2      -2      3      2    -.44
       EMR  |   4 |    5.6   -4.4   14.4     -14      4    -14     .08
       ESA  |   4 |    -.6    -.6    -.3     -23      1      3    -.19
       GFZ  |   4 |    -.7    -.2     .2      -5     -9     20    -.12
       GRG  |   4 |    4.7    5.6   13.3       2     -9    -22    -.06
       JPL  |   4 |    3.4   -2.7   15.0      -2     -4    -11    -.35
       MIT  |   4 |    8.6     .9   11.1      12    -26     11    -.17
       NGS  |   4 |   -1.3    3.6   15.5      31    -68     52    -.06
       SIO  |   4 |    5.6     .5   17.1     -40   -175     27    -.68

       COD  |   5 |     .5    -.1     .3       0      1      7    -.51
       EMR  |   5 |    6.9   -4.3   14.5      -2      4    -28     .12
       ESA  |   5 |    -.3   -1.4    -.9     -25     13     10    -.22
       GFZ  |   5 |    -.1    -.1     .2       3    -14     25    -.08
       GRG  |   5 |    5.7    3.6   11.9      -5     -8    -17    -.09
       JPL  |   5 |    3.1    3.4   15.5     -13    -12    -26    -.22
       MIT  |   5 |    9.0    3.5    6.4      -1    -15     -3    -.22
       NGS  |   5 |    1.2    8.1   14.2      20    -66     45    -.13
       SIO  |   5 |    5.2    2.6   15.6      17   -162     48    -.60

       COD  |   6 |     .6    -.4    -.0       0      2      6    -.60
       EMR  |   6 |    3.8    1.7     .1      -6      4    -36     .09
       ESA  |   6 |    -.0    -.2     .5     -31     14     -6    -.16
       GFZ  |   6 |     .1     .3     .4      -2    -18      6    -.14
       GRG  |   6 |    -.6    4.3    6.6       0    -16    -17     .03
       JPL  |   6 |     .5    5.4   14.2      -4      5    -12    -.40
       MIT  |   6 |    5.4    5.8    3.6      -3    -11    -22    -.14
       NGS  |   6 |   -1.9    5.3    5.2       7    -11     42    -.17
       SIO  |   6 |    3.8    3.4    7.0      33    -97     52    -.52


10. As inidicated in the previous remarks, the IGS final orbits are aligned to the
    IGS reference frame by pre-aligning each AC orbit with the 3 corresponding
    SINEX rotations. This approach began 27-Feb-2000 (GPS Week 1051-0; MJD 51601).
    Starting sometime prior to 19-Aug-2012 (GPS Week 1702; MJD=56158), the orbit
    combination procedures used an incorrect sign convention to apply the SINEX
    RX and RY values to the AC orbits.
    
    Also starting 27-Feb-2000 (GPS  Week 1051-0; MJD 51601), the AC orbits were
    pre-aligned using rotations derived from differences between AC and IGS
    combined x and y polar motion. These ERP rotations were intended to
    approximate day-to-day variations of the AC orbital frames when only weekly
    averaged AC TRF rotations were available (For more details, see IGSMAIL
    #2750). With the change to daily SINEX integrations starting 19-Aug-2012, the
    ERP rotations are no longer needed/applied.

11. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) the absolute antenna model is introduced (IGSMAIL
    #5438). The antenna phase center offsets and phase center variations are given
    in the file:
        ftp://igs.org/igscb/station/general/igs05.atx
    These antenna calibrations are also used in the homogeneously reprocessed IGS
    products from GPS Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) the absolute antenna
    model is updated (IGSMAIL #6255 & #6374) as given in the file:
        ftp://igs.org/igscb/station/general/igs08.atx
    
    The JPL solution did not use IGS08/igs08.atx until GPS Week 1649, which caused
    their RMS clock residuals to be higher during that period than for the other
    centres; from GPS Week 1632 through 1648 the JPL solution is excluded from the
    weekly SINEX combination.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) the absolute antenna
    model file has been updated to igs14.atx to be consistent with IGS14.
    See IGSMAIL #7399 for more information
        ftp://igs.org/pub/station/general/igs14.atx


ORBIT COMBINATION AND EVALUATION STATISTICS:                                    
--------------------------------------------                                    

Most combination statistics are with respect to the combined orbits and
consist of seven parts. The first, Table 1, summarizes all statistics for
the week. It contains means and standard deviations over the week of
satellite ephemeris and clock correction transformation parameters for
each centre (Table 1.2141.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2141.b).
The second part, Table 2, contains the complete ephemeris and clock
correction transformation parameters (includes both the apriori and a
posteriori values) for each centre and each day (Tables 2.2141.[0-6]).
The third part, Table 3, contains two types of daily RMS for each satellite
and centre, along with the computed satellite position sigmas for the
combined orbits (Tables 3.2141.[0-6]). The first type of satellite RMS is
based on orbit combination and the second RMS type is a result of the 7-day
arc evaluation of each centre ephemerides. The fourth part, Table 4, is a
weekly summary of the daily precise navigation summaries for centres
providing both orbit and clock solutions. It contains weekly station RMS
w.r.t. the initial coordinates for the Latitude, Longitude and Height 
components for up to three IGS stations (Table 4.1307). The fifth part, 
Table 5, is similar to Table 4 and contains daily precise navigation
statistics (Tables 5.2141.0-6). The sixth part, Table 6, is a weekly
summary of daily ERP combination statistics. The seventh part, Table 7,
contains the daily ERP statistics. But this is not the IGS official ERP
combination products (which come from the accompanying SINEX combination)
but provided to check combination consistency, etc.

In Tables 1-3, the most important statistic which is meaningful for intra
centre/satellite analysis is labeled WRMS. It is a weighted RMS where
normalized weights are based on accuracy codes given in the SP3 files, and
should not be affected by downweighted/problem satellites when acknowledged
by individual centres in their SP3 file.
                                                                               

             
Table 1: Week 2141 summary.                       (Jan 17, 2021 - Jan 23, 2021)

Table 1.2141.a   GPS week: 2141   MJD: 59231.000-59237.000

         Mean and standard deviations of transformation parameters to the 
         combined IGS orbit.
         WRMS - orbit RMS weighted by the SP3 header accuracy codes.
         STA  - Mean number of stations in the daily solutions.
   
CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  725|   -1     0     0     0    -4     1  -.10    7    7 |    -743     332      6     84
        |    0     0     0    12    12    13   .02           |     186     275
emr   79|   -1    -3     5   -11     9   -13   .21   15   14 |  203946     -47     13    180
        |    2     1     2    17    20     4   .02           |     613     305
esa  150|    0     0     0    -3   -13     1  -.03    8    7 |   -1165     819      6     67
        |    0     0     1    17    17     6   .02           |     384     495
gfz  214|    0     1    -2     8    -8    -5   .15   13   13 |    -256     112     11     66
        |    0     0     1    18    18    15   .03           |     315     392
grg  102|    0     0     2     4     7    17  -.10   11    9 |    -267     353      8    120
        |    0     0     4    14    17     7   .03           |      62     149
igr  n/a|    0     0    -2     0    -7    -5   .04    4    4 |    2680    -371     10     85
        |    0     0     1    10    21     4   .02           |    1104     224
jpl   80|    0    -1     4     0     1    -3   .15    9    9 |    2223     111      8     78
        |    3     2     1    11    16    12   .03           |     606     538
mit  358|    1     0    -1     2    16    -5  -.02    9    6 |    1800    -335     27   1451
        |    0     0     1    15    31    18   .01           |    1205     273
ngs  198|    0     0     0   -22    -1    -9  -.02    9    8 |    -750     336   1041   1979
        |    0     0     2    14    12     9   .01           |     146     244
sio  414|    0     1    -8    12   -14    26  -.05   23   11 |     ---     ---    ---    ---
        |    0     0     2    62    94    30   .04           |     ---     ---


Table 1.2141.b   GPS week : 2141   MJD: 59231.000-59237.000   

         Satellite position sigmas for the combined orbits
         (coded in the IGS SP3 orbit files).
         "E" flags eclipsing satellites.
         Units: mm.

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    3    3    3    3    3    3    3 |
   2  |    3    3    3    3    3    3    3 |
   3  |    4    5    8    7    5    4    4 |
   4  |    3    3    3    3    3    3    3 |
   5  |    4    4    5    4    4    4    5 |
   6  |    3    3    3    3    2    3    3 |
   7  |    3    3    3    3    2    2    2 |
   8  |    3    3    3    3    3    3    3 |
   9  |    3    3    3    3    3    3    3 |
  10  |    4    4   15    6    5    5    5 |
  11  |    4    4    4    4    4    4    5 |
  12  |    4    4    5    4    4    4    5 |
  13  |    3    3    3    3    4    3    3 |
  14  |    5    4    4    4    4    4    4 |
  15  |    3    3    3    3    0    3    3 |
  16  |    4    4    4    4    4    4    4 |
  17  |    3    3    3    3    3    3    3 |
  18  |    4    4    4    4    4    4    4 |
  19  |    3    3    4    3    3    4    4 |
  20  |    4    4    4    3    4    4    3 |
  21  |    3    3    4    3    3    3    3 |
  22  |    3    3    3    3    3    3    3 |
  23  |    5    6   10    7    7    7    6 |
  24  |    3    3    3    3    4    3    3 |
  25  |    3    3    3    3    3    3    3 |
  26  |    4    3    3    3    3    3    3 |
  27  |    3    3    3    3    3    3    3 |
  28  |    3    3    3    3    3    3    3 |
  29  |    3    3    3    3    3    3    3 |
  30  |    3    3    3    3    3    3    3 |
  31  |    3    3    3    3    3    2    3 |
  32  |    3    3    3    3    3    3    3 |



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.2141.0   GPS week: 2141   Day: 0   MJD: 59231.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  729|    0     0     0   -22     6    18  -.10    8    7 |    -748     220      6     88
emr   80|    0    -3     2    19    -1   -20   .22   14   13 |  205018    -248     14    191
esa  150|    0     0    -1    18   -19     1  -.06    7    7 |   -1075    1195      7     67
gfz  212|    0     2    -3    34   -12    15   .16   11   10 |     -98     660     11     59
grg  100|    0     0     8    26    -6    15  -.13   10   10 |    -170     463      8    122
igr  n/a|    0     0    -3    17   -20    -4   .04    4    4 |    4401    -495     10     98
jpl   80|   -1     0     2    16   -11    -4   .14    9    9 |    2337     554      9     63
mit  358|    1     0     0    -7    43    -5  -.02    8    7 |    3555    -492     26   1125
ngs  199|    0     0     0   -30    -5   -17  -.02   10    9 |    -793     293   1370   2138
sio  412|    0     0    -8   -53   -22    24  -.06   19   11 |     ---     ---    ---    ---

Table 2.2141.1   GPS week: 2141   Day: 1   MJD: 59232.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  729|    0     0     0    15    -9   -21  -.09    7    6 |    -894     698      6     85
emr   80|   -2    -1     2   -30    -1   -11   .20   13   13 |  204417    -488     15    183
esa  150|    0     0     0   -31   -24    11  -.03    8    7 |   -1128     870      6     65
gfz  220|    0     1    -4   -21    -1     4   .18   13   16 |     243    -514     11     59
grg  103|    0     0     9   -16    -3     4  -.14   11   10 |    -201     352      9    102
igr  n/a|    0     0    -2    -9   -23    -2   .02    4    4 |    3596    -682     10     79
jpl   80|   -1     0     1    -2   -15     6   .09    9    9 |    2628      46     10     83
mit  358|    1     0     0    23    29    -2  -.00    7    7 |    2743    -657     28   1944
ngs  199|    0     1     0   -25     0    -4  -.02    9    8 |    -914     716   1380   2380
sio  421|    0     1    -7    90    38    52  -.06   19   11 |     ---     ---    ---    ---

Table 2.2141.2   GPS week: 2141   Day: 2   MJD: 59233.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  727|   -1     0     0    10    15     9  -.08    9    7 |    -990     554      6     86
emr   80|   -3    -2     4   -27    35   -12   .20   16   15 |  203956    -218     13    172
esa  150|    0     0    -1     1     9     0  -.04    9    7 |    -698     -82      7     78
gfz  211|    0     1    -2    15    18     8   .13   13   16 |    -280     -67     11     66
grg  105|    0     0    -1    -9    22    25  -.09   13   10 |    -308     429      9    128
igr  n/a|   -1     0    -2     0    16    -8   .04    5    4 |    2987    -487     10     81
jpl   80|    6    -5     4   -13     7    12   .18   12   12 |    2678     288      9    103
mit  358|    0     0     0    17    12    -8  -.01   16    6 |    2391    -426     26   1314
ngs  200|    0     1    -1    -8   -18   -15  -.04    9    8 |    -951     552    965   1921
sio  418|    0     2    -4   -80  -207   -20   .02   27   14 |     ---     ---    ---    ---

Table 2.2141.3   GPS week: 2141   Day: 3   MJD: 59234.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  725|   -1     0     0    -4   -11     0  -.11    7    7 |    -706     210      6     76
emr   79|   -5    -5     9    -5    38   -10   .23   16   16 |  203460      93     15    183
esa  150|    0     0     0     4     6     8  -.04    7    7 |   -1891    1135      6     61
gfz  210|    0     1    -1    -8     8    -8   .13    9    8 |    -232     -23     12     61
grg  105|    1     0     0     1    35    19  -.10   11    9 |    -318     122      8    108
igr  n/a|   -1     0     0    -1    29    -3   .04    4    4 |    2324     -52     11     95
jpl   80|    0     0     3   -11    25    -2   .14    8    8 |    1241      82      9     71
mit  358|    1     0     0    -8   -37   -20  -.02    8    6 |    1420     136     32   1288
ngs  200|    1     0     0     2    22   -10  -.03    8    8 |    -689     171   1094   1996
sio  413|    0     1   -10    38   -43    43  -.06   24   11 |     ---     ---    ---    ---

Table 2.2141.4   GPS week: 2141   Day: 4   MJD: 59235.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  724|   -1     0    -1    -3    -2     0  -.11    6    6 |    -504      32      6     89
emr   80|    0    -5     6   -17   -14   -17   .19   14   14 |  203826      17     12    194
esa  150|    0     0     0     6   -37    -8   .01    7    7 |    -917     498      8     64
gfz  215|    1     1     0    14   -11   -19   .17   14   13 |    -371     155     10     61
grg  100|    1     0     0    12     0    24  -.08   10    9 |    -262     303      8    114
igr  n/a|    0     0    -1    -6   -15   -10   .07    4    4 |    2442    -379     10     75
jpl   80|   -1    -1     4     0   -16   -26   .18    8    8 |    2977    -910      8     79
mit  358|    1     1    -2    13    27    27  -.03    8    6 |    1523    -408     26   1791
ngs  196|    0     0     5   -43    -5     7  -.02   10    9 |    -575     101    778   1619
sio  411|   -1     1   -10     5    81   -11  -.11   22   11 |     ---     ---    ---    ---

Table 2.2141.5   GPS week: 2141   Day: 5   MJD: 59236.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  723|    0     0     0     3   -20    -9  -.13    7    7 |    -852     583      6     84
emr   80|    0    -5     5     0    17   -10   .21   14   14 |  203779     467     13    181
esa  150|    1     0     0     0    -6    -1  -.02    8    8 |   -1045     745      7     74
gfz  217|    0     1    -3    16   -24   -23   .19   15   13 |    -244      46     13     78
grg   99|    0     0     2     6    15    14  -.07   10    9 |    -277     570      7    127
igr  n/a|    0     0    -2    13   -16    -9   .06    4    4 |    1992     -97     11     77
jpl   80|   -2     0     5    15    15    -6   .13    8    8 |    1942     775      9     74
mit  358|    1     0    -2   -13   -12     0  -.02    8    6 |    1084     -63     25   1457
ngs  196|    0     1     2   -22    -3    -4  -.03    8    7 |    -589      72    950   1728
sio  413|    0     0   -10    17    33    46  -.06   27   10 |     ---     ---    ---    ---

Table 2.2141.6   GPS week: 2141   Day: 6   MJD: 59237.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  720|    0     0     0     6   -12    12  -.10    7    7 |    -510      29      6     85
emr   80|   -1    -3     4   -17    -6    -9   .23   14   14 |  203167      43     14    157
esa  150|    0    -1     3   -20   -25     3  -.02    8    7 |   -1405    1373      6     64
gfz  216|    1     0    -2     5   -33   -17   .09   13   13 |    -813     532     13     82
grg  103|    1     0    -3    11    -9    16  -.07   10   10 |    -337     237      9    142
igr  n/a|    0     0     0    -6   -20     0   .04    4    4 |    1018    -405      9     94
jpl   80|   -2     0     6    -2     4    -6   .16    8    8 |    1761     -53      7     79
mit  358|    1     0    -2    -8    53   -29  -.02    8    6 |    -116    -437     27   1241
ngs  197|    0     1    -1   -26     0   -19  -.01    9    9 |    -742     452    755   2075
sio  412|    0     2    -6    69    20    52  -.06   21    9 |     ---     ---    ---    ---

       
       
Table 3: Daily fit for each satellite and each centre resulting from weighted
         average combination and from long arc orbit dynamics (7-day). The
         first IGS column gives resulting satellite accuracy measures found in
         SP3 header. The last IGS column gives the RMS fit of the IGS orbit
         when processed through the 7-day arc evaluation.

         "E"    stands for eclipsing satellites (earth).
         "M"    stands for eclipsing satellites (moon).
         "X"    stands for excluded from the statistics but included in IGS orbit.
         "T"    stands for Total long arc orbit RMS for all satellites.
         "NE"   stands for long arc orbit RMS for Non-Eclipsing satellites only.
         "MEDI" stands for median of the centre's satellite RMS.
         "MD"
         Units: mm.

Table 3.2141.0   GPS week: 2141   Day: 0   MJD: 59231.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5    9    7    8    7    3    9    5    7   10    2 |    19   24   23   22   19   21   24   21   19   23    20
   2  |    8   11    5    9   10    3    8    5    7   10    2 |    20   25   25   27   20   22   22   24   21   28    22
   3E |    7   10    8   23    9    4    8    6   12   15    4 |   155  154  159  162  156  158  143  157  149  156   156
   4  |    5   10    6    9   10    5   11    6    7   10    2 |    71   69   69   75   69   71   70   74   73   77    71
   5E |    8   16    9   11   14    5    7    6   22   16    4 |   128  130  128  126  123  127  127  132  132  132   128
   6  |    6   10    7    9    7    3    9    4    7   10    2 |    24   30   28   27   25   27   30   25   24   30    26
   7  |    6   12    6    7    5    4    8    5    6   11    2 |    31   33   28   32   29   29   33   30   29   33    30
   8  |   10   10    8    9   11    4    9    7    9   12    3 |    23   27   23   22   26   22   23   22   23   29    22
   9  |    7   10    7    6    7    4    8    7    5    9    2 |    37   38   35   40   37   36   38   38   36   38    36
  10E |   11   13    7   24   13    4   11    7   12   10    4 |   216  173  220  219  215  218  211  217  218  224   217
 X11  |    9   11  ---    9   12    6   10    6   12  ---    4 |    21   27  ---   19   18   19   26   20   20  ---    20
  12  |    9   22    6   13   20    6   10    6    7    8    4 |    45   51   42   44   51   43   46   44   45   45    44
  13  |    7   11    5   10    7    4   10    6    5   11    2 |    31   44   32   31   33   34   41   33   33   31    33
  14  |    8   15    7   12   11    5   11   14   14   85    4 |    61   59   59   63   60   61   60   57   62   93    59
  15  |    5    8    6    7    8    3    7    9    7    8    2 |    29   33   26   30   29   30   31   29   29   31    31
  16  |    6   31    8   12   12    6    6   10    8   13    4 |    40   51   36   39   41   38   39   44   44   43    40
  17  |    9   14    4    9   10    3    8    5   10   13    3 |    29   32   25   33   27   28   28   30   27   34    27
  18  |    9   14   13    8   10    7   10    8   11   14    3 |    62   69   63   66   67   63   66   66   67   62    65
  19  |    8   16    4    7   11    4   10    6   12   12    3 |    28   29   30   33   29   29   30   33   28   35    29
  20E |   11   10    7   12   15    5    9   10    8   15    3 |    37   40   38   38   39   37   36   40   37   42    37
  21  |    6    9    4    7   11    2    8    7    8    8    2 |    16   20   18   20   15   18   21   19   20   22    17
  22E |    8    7    6    8    6    4   10    7    9   11    3 |    49   50   49   48   49   48   47   51   52   56    49
  23E |    9   20   12   18   16    5   13   13   15   19    5 |    65   64   60   59   65   61   63   62   66   65    63
  24  |    6   10    6   10    9    3   11    9    7    8    3 |    25   37   30   37   24   31   37   27   26   30    29
  25  |   10   14    7    8    9    3    9    6    7    7    3 |    43   44   48   49   45   45   43   44   47   47    45
  26  |    8   22    7   10   14    5    8   10   10   11    3 |    39   43   38   38   42   38   39   40   39   43    38
  27  |    8    9    7    9   10    4    7    8    8   13    3 |    24   28   23   21   25   22   25   22   24   25    23
  28  |    7   14    4    7    9    4    8    6    9   14    3 |    42   38   39   42   39   40   38   41   38   42    39
  29  |    9   19    6    6    9    5    8    6    7    9    3 |    35   35   34   39   34   36   33   34   35   37    34
  30  |    5   10    4    6    6    2   10    5    8   12    2 |    28   36   28   30   26   29   35   30   29   33    29
  31  |    6   11    5    4    7    4    7    8    8    8    2 |    37   40   37   38   38   37   41   36   38   38    37
  32  |    8   11    6    9    6    2    9    8    9    9    3 |    43   51   44   42   43   43   47   43   44   45    43
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   14    7   11   10    4    9    8   10   19      |T   48   50   49   50   48   48   49   49   49   53    48
 WRMS |    7   13    7   10   10    4    9    7    9   11      |NE  34   38   35   36   35   35   37   35   35   39    34
 MEDI |    8   11    6    9   10    4    9    6    8   11      |MD  37   38   36   38   37   36   38   36   36   38    36

Table 3.2141.1   GPS week: 2141   Day: 1   MJD: 59232.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5    9    7    9   10    3    8    4    6    9    2 |    17   23   22   21   18   19   22   18   18   25    18
   2  |    6   12    7   12    9    3    7    5   12    9    3 |    15   21   21   25   16   18   18   19   21   26    18
   3E |    6   11   10   38   14    5   12    6   15   13    5 |   110  109  111  119  108  110  101  110  103  114   110
   4  |    5   11    4    7    9    5   11    5    7    9    2 |    50   51   49   53   47   52   51   54   54   59    51
   5E |   10   12   10   17   19    7    7   11   12   14    4 |   120  122  117  117  120  118  119  120  123  118   119
   6  |    5   10    7    9    6    2    7    5    7    8    2 |    18   26   21   20   18   20   23   19   19   24    19
   7  |    4   10    5    7    6    3    6    5    5   13    2 |    17   21   17   24   20   18   20   17   19   20    18
   8  |    7    9    7    9   11    4    8    6    5   13    2 |    19   23   23   20   23   21   23   20   22   24    20
   9  |    5    8    6    7    8    4    8    5    8   12    2 |    25   31   25   28   26   26   30   28   25   30    26
  10E |    8   11    8   21   13    4   13    7    9    9    3 |   176  168  180  178  175  178  179  176  176  182   177
 X11  |    9   12  ---   12   12    5   10    5   10  ---    4 |    17   26  ---   20   18   16   24   17   16  ---    17
  12  |    8   25    6   22   20    5    9    6    8    7    4 |    30   39   28   32   35   30   35   31   34   33    31
  13  |    5   13    5   12    5    5   11    6    9   18    3 |    20   30   21   20   20   21   29   23   23   26    21
  14  |    8   16    8   17   11    7   11   10   13   88    4 |    35   36   36   42   34   37   37   36   37   87    35
  15  |    6    8    6    7    6    4    6    7    6   11    2 |    22   26   20   23   23   22   25   23   24   25    23
  16  |    7   25    7   11   12    7    6    9    9   17    4 |    29   39   29   34   30   28   31   35   31   34    31
  17  |    7   11    4    8    8    3    8    4    6    9    2 |    23   26   22   29   23   25   26   25   24   30    24
  18  |    8   15   15    8    8    6    9    9    9   12    3 |    35   41   36   36   38   35   37   38   34   38    36
  19  |    6   14    4   11   10    3    8    4    8    8    2 |    22   23   23   25   22   23   25   25   24   29    23
  20E |    7   16    7    7   11    4   13   10    8   14    3 |    28   32   25   27   26   26   27   29   26   33    26
  21  |    4    9    4    9   11    4    8    5    5    9    2 |    13   18   17   21   15   17   18   16   18   22    15
  22E |    5    7    8   10   13    3    8    5    7   10    2 |    38   37   39   38   43   39   37   38   41   40    38
  23E |   15   18   17   22   16    7   21   15   15   21    6 |    37   35   31   44   39   32   30   32   38   35    32
  24  |    5   10    7    9    8    2   11    4    6    8    2 |    17   29   22   24   15   21   30   18   20   22    20
  25  |    8   12    9   10    9    3    9    6    8    9    3 |    28   31   35   33   34   31   32   30   29   32    30
  26  |    5   19    6   12   13    4    7    8    9   10    3 |    27   32   29   28   30   27   29   29   27   31    27
  27  |    6   11    8   13   11    2    7    7    8   11    3 |    18   25   22   19   24   20   22   19   21   22    20
  28  |    6   15    5   13   11    4    8    6    7   11    3 |    26   25   26   34   24   28   24   27   29   32    26
  29  |    8   15    6    9   10    3    9    8    8   10    3 |    24   27   23   28   24   25   24   26   25   28    24
  30  |    6   10    6    4    6    3   11    5    5   15    2 |    19   32   23   26   22   23   31   23   24   28    23
  31  |    6   10    7    7    6    4    6    7    8   11    2 |    20   23   20   22   20   19   23   21   20   27    20
  32  |    6   12    6    6    9    4    8    7    9    9    2 |    27   39   29   32   31   30   34   30   30   33    30
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   13    8   13   11    4    9    7    9   19      |T   35   39   36   38   36   36   38   36   36   42    35
 WRMS |    6   13    7   16   10    4    9    7    8   11      |NE  23   29   25   27   25   25   27   25   25   31    24
 MEDI |    6   11    7    9   10    4    8    6    8   11      |MD  24   30   25   28   24   25   29   26   25   30    24

Table 3.2141.2   GPS week: 2141   Day: 2   MJD: 59233.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5   11    7    9    9    3   10    4    6   16    2 |    17   25   19   17   18   18   24   16   18   29    17
   2  |    7   15    6    9    9    3    9    5    7   12    3 |    15   18   18   24   16   17   18   17   18   27    16
   3E |   12   23   11   50   15   12   23   18   19   19    7 |   128  130  132  145  131  133  118  132  129  128   130
   4  |    6   14    5    6    6    3   13    6    6    9    2 |    54   54   54   54   55   54   55   55   57   56    54
   5E |   13   13   10   17   28    8    9    4   16   12    5 |    88   89   91   91   82   91   91   91   89   90    89
   6  |    4    9    8   13    7    3    8    5    5    7    2 |    20   27   22   25   21   22   27   20   21   26    21
   7  |    5    9    6   11    5    3    9    4    6   14    2 |    21   23   19   29   20   22   26   21   23   25    21
   8  |    8    8    8    9    8    3   11    5    7   21    3 |    19   25   22   18   20   19   22   18   22   29    19
   9  |    8   10    7    6    5    4   11    5    7   13    2 |    17   28   21   21   19   19   30   19   19   25    20
 X10E |   38  ---   17   37   74   16   36   21   50   99   15 |   360  ---  366  367  353  361  339  361  358  372   361
 X11  |    9   14  ---   11   10    9   11    4   11  ---    4 |    15   28  ---   20   17   20   25   17   22  ---    17
  12  |   10   27    7   16   20    5   12    6    8   12    4 |    28   33   27   28   34   27   32   26   26   32    27
  13  |    7   14    5   10    8    4   11    6    6   22    3 |    16   31   19   16   23   19   29   19   19   24    19
  14  |    7   17   10   13   12    4   11    8   11   96    4 |    44   41   43   48   48   43   43   40   47   92    43
  15  |    7   10    7    8    8    3    8    6    5   22    3 |    25   25   20   24   20   24   28   23   19   29    25
  16  |    6   32    7    9   10    6   10    8    8   14    4 |    26   37   23   25   26   23   26   29   24   31    25
  17  |    8   23    7    9   10    4    9    5    7    7    3 |    22   31   24   28   22   23   24   23   27   31    22
  18  |    8   15   13   10    8    7   12    7    9   18    3 |    40   46   39   42   43   39   44   42   43   49    41
  19  |    8   24    9   11   11    2   10    5    6   11    3 |    20   25   25   27   19   21   21   22   22   32    20
  20E |   10   14    7    6   10    5   10    9    6   30    3 |    27   31   28   27   30   29   31   32   29   45    29
  21  |    7   11    6    8   26    5   12    5    6   20    4 |    12   20   14   18   27   16   21   16   17   31    15
  22E |    7    8    6    9    8    4   10    5   10    9    2 |    24   25   25   23   27   24   25   26   25   33    25
  23E |   23   20   29   17   33    7   31   82   14   69   10 |    86   71   66   81   91   71   67   69   74   68    73
  24  |    6   12    7    9    6    2   10    6    7   14    2 |    18   30   24   28   18   21   32   19   18   25    21
  25  |   10   11    8    7    7    3   10    7    9   16    3 |    25   29   28   29   29   26   29   26   25   34    26
  26  |    7   16    8    7   12    5   10    7    8   18    3 |    26   29   27   28   27   25   28   28   25   38    26
  27  |    7    8    8    7    7    3   11    5    8   22    3 |    19   22   21   21   20   20   24   18   22   29    19
  28  |    6   15    5   13    9    5    8    5    8   17    3 |    23   24   23   28   22   23   22   23   22   28    22
  29  |    9   18    5    9   10    4    9    6    9   16    3 |    20   20   19   25   21   21   21   19   22   26    19
  30  |    6   11    5    8    8    3   10    6    4   18    2 |    18   30   23   24   18   22   30   20   21   29    21
  31  |    5   12    7    8    6    4    7    6    5   15    2 |    26   30   23   25   23   25   34   27   25   38    25
  32  |    6   12    6    5    8    2   14    5    6   29    3 |    28   35   27   29   27   28   33   26   25   41    27
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   16    9   13   13    5   12   16    9   27      |T   41   35   42   44   42   42   44   41   42   51    41
 WRMS |    7   15    7   16   10    4   12    6    8   14      |NE  23   29   24   26   25   24   28   24   24   34    24
 MEDI |    7   14    7    9    9    4   10    6    7   16      |MD  23   29   24   27   23   23   28   23   23   31    22

Table 3.2141.3   GPS week: 2141   Day: 3   MJD: 59234.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5    9    7    6    8    3    8    5   10    8    2 |    18   24   23   19   19   21   23   19   22   23    19
   2  |    7   14    7   10    9    3    6    7    6   12    3 |    16   20   21   26   17   20   18   19   20   27    19
  X3E |   11   17   11   33    8    6  ---   12   19   11    6 |   108  110  108  117  104  110  ---  107  110  107   108
   4  |    5   14    6    6    8    4    9    5    7   10    2 |    44   37   42   45   45   43   42   46   44   48    43
   5E |   10   12    8    8   13    4    8   13    7   13    3 |    55   55   56   56   57   57   56   55   58   57    55
   6  |    6    8    9    8    7    3    6    6    8   10    2 |    21   27   26   21   22   23   27   21   24   26    22
   7  |    4   12    6    6    6    3    7    4    6   16    2 |    24   29   20   26   21   23   25   21   24   27    23
   8  |    7   11    8   10    9    4    8    6    8   12    3 |    18   24   22   19   20   19   20   19   21   22    18
   9  |    6   13    6    7    6    3    7    6    6   16    2 |    16   28   19   20   17   19   23   19   18   21    18
 X10E |    6   21   10   15   18    8  ---   17   15   19    5 |   128  152  127  126  125  127  ---  131  128  120   127
 X11  |    8   12  ---   13   12    6   11    6    9  ---    4 |    17   27  ---   19   18   18   26   18   19  ---    18
  12  |    9   23    7    8   22    4   10    7    9    7    4 |    26   30   21   27   31   24   25   26   26   26    24
  13  |    5   14    4    9    7    3   10    5    4   16    2 |    18   32   19   21   23   21   29   23   22   28    21
  14  |    8   19   11   12   13    4    9    8   12  117    4 |    44   41   42   49   48   45   46   43   46  115    44
  15  |    4    9    5    6    9    3    6    7    8    9    2 |    20   29   23   26   26   21   28   25   26   30    21
  16  |    8   27    8    9   11    4    7    9    7   10    3 |    26   34   23   27   27   23   24   29   27   27    25
  17  |    9   18    4    8   10    2    7    5    6    9    2 |    19   27   19   24   21   22   23   22   24   27    20
  18  |    7   18   12    8    9    5    8    8   11   11    3 |    36   44   34   41   42   38   41   44   41   51    39
  19  |    8   24    5    8   10    3    9    5   10    8    3 |    18   22   20   23   18   20   20   20   23   25    18
  20E |    7   17    7    5    9    4    9    9    8   12    3 |    24   32   25   27   26   26   24   30   29   34    26
  21  |    6   11    6   10    9    4    8    6    7    8    2 |    15   20   17   20   15   17   18   17   18   21    16
  22E |    6   28    7    9    7    6    7    5    6    9    3 |    19   33   19   18   19   19   19   18   19   22    18
  23E |    9   24   11   22   21   10   13   29   17   24    6 |    45   53   48   48   49   50   52   60   55   59    49
  24  |    7   12    4    9   10    3   10    7    6    8    2 |    19   33   22   31   20   23   32   20   22   24    23
  25  |    9   13    7    7   13    3    7    6    8   11    3 |    20   23   22   23   21   20   21   19   19   23    19
  26  |    6   13    7    8   11    3    9    8    6    7    3 |    24   29   26   27   29   25   25   27   24   26    25
  27  |    7   14    8    6    7    3    7    5    9   12    2 |    19   24   21   19   20   19   22   18   22   20    19
  28  |    6   16    5   10   11    3    8    6    8   15    3 |    25   30   24   28   23   25   22   23   25   26    23
  29  |    8   19    6    5   11    3    8    6    9   11    3 |    19   22   17   22   20   19   19   19   21   20    18
  30  |    4   12    5    5    5    2    9    5    6   13    2 |    14   30   17   19   13   17   26   15   17   19    17
  31  |    6   13    5    8    6    3    7    5    8    7    2 |    26   34   26   22   24   25   30   25   27   26    25
  32  |    5   11    6    8    7    4    8    5    8    6    2 |    17   27   19   17   15   18   23   17   19   17    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   16    7    9   11    4    8    8    8   24      |T   29   36   31   32   31   31   27   31   32   36    30
 WRMS |    7   16    7    8    9    4    8    6    8   11      |NE  22   28   23   25   23   23   26   23   24   29    22
 MEDI |    7   14    7    8    9    3    8    6    8   11      |MD  20   29   22   24   21   22   24   21   24   26    21

Table 3.2141.4   GPS week: 2141   Day: 4   MJD: 59235.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    4    8    7    9    7    3    6    6    7    9    2 |    22   28   26   23   23   24   28   22   25   28    23
   2  |    6    9    5    9    9    3    7    6   10   10    2 |    26   29   28   31   25   28   27   26   27   34    26
   3E |    6   10    7   44   12    6    7    8   13   18    5 |   106  107  109  109  105  106  135  105  103  110   105
   4  |    5   14    7    8    8    6    7    9    8   10    3 |    62   62   62   64   63   63   64   62   64   64    62
   5E |    6   13    8   10   17    4    7    9    9   14    3 |    67   67   67   66   63   66   67   65   68   64    66
   6  |    4    9    7    9    6    3    6    5    5    8    2 |    29   34   33   30   30   32   34   30   30   35    30
   7  |    3    9    5    9    6    3    6    4    7   12    2 |    26   31   27   32   26   28   31   25   30   32    27
   8  |    6    9    6   10    9    4    9    4    9   10    2 |    23   27   26   26   25   25   29   24   26   29    24
   9  |    7   11    7    8    7    2    7    6    7   12    2 |    29   37   31   33   31   31   36   30   32   35    31
  10E |    8   12   10   34    6    4    9   10   14   13    4 |   183  128  191  190  185  186  210  186  182  189   186
 X11  |    6   12  ---   12   11    8    9    6    7  ---    3 |    20   30  ---   23   21   22   31   22   25  ---    22
  12  |    9   24    8   13   20    3   10    7   10   11    4 |    34   39   32   35   37   34   36   33   38   38    33
  13  |    6   13    8   10    7    3   10    6    7   23    3 |    27   38   29   29   30   29   36   28   28   33    28
  14  |    8   17   10   15   10    5   10    8   12  101    4 |    45   44   44   50   47   44   44   45   47  102    45
 X15  |    2  ---  ---  ---  ---   13  ---  ---  ---  ---    0 |    21  ---  ---  ---  ---   23  ---  ---  ---  ---    23
  16  |    4   27    8    9   11    6    8    5    7   11    3 |    34   43   33   37   35   33   36   33   39   37    34
  17  |    6   12    5    9    8    2    6    7    5   11    2 |    31   33   32   37   31   33   34   33   34   42    32
 X18  |    7   16   14   11    9    5    9    9   13  ---    4 |    45   52   43   48   47   45   50   48   52  ---    46
  19  |    7   19    5    9   10    3    9    8   11    9    3 |    27   29   31   32   26   29   30   31   32   37    28
  20E |    6   13    7    7    8    3    9    8   15   17    3 |    23   26   25   26   27   23   24   26   26   34    24
  21  |    6    9    5    8   10    4    7    7    7    8    2 |    21   25   22   26   20   22   26   22   24   28    22
  22E |    5   10    7    8    6    4    6    5   11   13    2 |    18   22   19   18   19   20   19   20   25   25    18
  23E |    8   26   14   27   17    8   14   23   25   26    6 |    44   48   47   41   43   41   45   50   49   51    43
  24  |    8   10    9   11   13    5    9    8   10   12    3 |    24   35   32   37   26   30   36   25   26   31    27
  25  |    8   10    7    6    9    3    8    7   10   10    3 |    34   35   37   37   34   35   36   34   35   40    34
  26  |    5   12    6    9   10    4    7    7   10    8    2 |    32   37   34   34   35   34   36   31   34   37    33
  27  |    5   13    8   10    7    3    8    3    8   12    2 |    23   30   26   31   24   27   30   24   28   29    25
  28  |    5   14    5   13    7    4    9    6    8    9    2 |    33   35   34   40   33   35   35   33   36   40    33
  29  |    6   19    7    6   11    2    8    7    8   13    3 |    26   29   28   29   27   28   28   27   28   33    26
  30  |    5    9    5    7    7    3    8    5    7   14    2 |    28   38   31   33   29   31   37   27   33   35    30
  31  |    5   10    5    9    6    3    6    7    9    7    2 |    27   33   29   33   27   29   33   28   33   33    29
  32  |    4   10    7   10    5    2    6    7    8    9    2 |    39   46   41   43   39   42   45   40   44   44    41
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    6   14    7   14   10    4    8    8   10   22      |T   38   41   41   42   39   39   44   39   42   47    39
 WRMS |    6   14    7   13    9    4    8    6    9   11      |NE  30   35   32   34   31   32   35   31   34   38    31
 MEDI |    6   12    7    9    9    3    8    7    9   11      |MD  28   35   32   33   30   31   36   30   33   35    30

Table 3.2141.5   GPS week: 2141   Day: 5   MJD: 59236.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5    9    7   10    6    3    7    5    6    9    2 |    19   26   22   20   20   21   25   20   23   25    21
   2  |    6   14    6   10    9    4    7    6    8    9    2 |    16   24   19   22   17   19   19   20   22   25    18
   3E |    5   11    8   29    8    5    6    9   10   12    4 |    88   86   89   90   87   88   81   88   84   90    87
   4  |    6   13    5    7    7    5    8    9    7   10    2 |    43   41   43   43   45   43   42   48   43   51    43
   5E |    8   13   11   10   12    5    5   14    5   16    3 |    91   95   90   92   90   92   93   95   92   96    92
   6  |    6   15    7   10    6    4    6    5    4    6    2 |    19   28   21   19   20   22   25   19   20   24    20
   7  |    5    9    6    7    6    3    6    4    5   10    2 |    18   24   17   22   18   20   21   18   22   23    19
   8  |    6    8    8   10    7    5    8    6    7   10    2 |    19   22   22   19   21   20   21   20   22   23    20
   9  |    9    9    7   10    6    2    8    6    5    9    2 |    18   26   20   21   18   19   25   18   20   23    19
  10E |    7   14   12   30   10    5    8   10   10   15    4 |   146  111  148  143  141  145  146  142  139  146   143
 X11  |    6   11  ---   14   10    9   10    8    8  ---    3 |    19   27  ---   22   20   21   26   19   21  ---    20
  12  |   10   24    7   20   20    6   10    7    5    8    4 |    32   39   28   29   35   30   34   30   33   31    30
  13  |    4   14    7   10    6    4   10    5    5   15    3 |    22   35   23   27   25   24   32   25   25   27    25
  14  |    7   18   10   13   10    5    9    8   11  132    4 |    40   41   39   44   41   41   41   41   41  122    40
 X15  |    9    8    7    8    9    5    7    8    6  ---    3 |    20   22   13   20   18   16   20   17   18  ---    17
  16  |    8   21    6   17   10    6    7    7    7   12    3 |    29   34   25   29   28   25   28   30   29   30    27
  17  |    9   15    7   12    8    4    8    6    8    9    3 |    22   25   18   28   21   22   23   22   24   27    21
 X18  |    8   15   12   11    9    5    9   11    8  ---    4 |    33   40   34   35   35   32   34   34   34  ---    33
  19  |    9   18    6   18    9    4    8    8    9    9    3 |    18   21   20   25   20   20   22   22   23   27    19
  20E |    6   13    7   11   13    4   11    8    8   15    3 |    43   46   42   44   44   43   45   46   45   51    44
  21  |    5   11    5    9    8    3    7    6    7    8    2 |    16   23   18   23   17   19   22   19   22   25    19
  22E |    4   10    8    9    8    4    5    6    5   10    2 |    48   50   49   46   49   49   48   49   49   51    49
  23E |    8   26   16   35   21    8   14   21   18   22    7 |    28   33   26   35   29   25   28   35   33   35    27
  24  |    8   12    7   10    8    4   11    9    6    9    3 |    23   35   24   27   20   25   33   24   23   23    24
  25  |    7   12    8    9    8    4    8    5    9    7    2 |    29   34   33   33   31   29   32   31   32   33    30
  26  |    8   15    8   12    9    4    8   10    9    9    3 |    33   35   35   34   35   32   35   37   33   37    34
  27  |    6   14    7   15    5    5    9    4    6   10    2 |    19   23   21   24   20   20   22   19   21   22    19
  28  |    6   13    6   10    9    5    8    6    6    8    2 |    22   24   22   27   22   24   22   22   25   25    21
  29  |    9   15    7    8   10    3    9    6    8   10    3 |    29   29   28   32   28   28   27   29   28   34    28
  30  |    6   11    4    6    6    3    9    5    5   10    2 |    14   31   18   22   15   20   28   16   20   19    18
  31  |    5   11    5    5    4    3    6    6    6    9    2 |    20   25   21   20   20   21   25   19   21   24    20
  32  |    6    9    7    9    5    3    8    6    6    7    2 |    23   29   23   25   23   23   29   20   23   23    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   14    8   15   10    4    8    8    8   27      |T   33   37   33   35   33   33   36   34   34   41    33
 WRMS |    7   14    8   13    9    4    8    6    7   10      |NE  23   29   24   26   24   24   27   24   25   31    24
 MEDI |    6   13    7   10    8    4    8    6    7   10      |MD  22   29   23   27   22   24   28   22   24   27    22

Table 3.2141.6   GPS week: 2141   Day: 6   MJD: 59237.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    4    9    7    8    8    3    8    4    8    8    2 |    18   25   22   21   20   22   24   20   20   22    20
   2  |    8   11    5    9    9    3    7    6    8   11    2 |    18   21   21   24   18   21   22   21   21   23    20
   3E |    6   12    5   25   15    4    7    8    9    7    3 |   139  139  141  140  141  140  136  141  141  141   140
   4  |    5   11    6    9    8    5    7   11    5   10    3 |    66   65   64   70   67   68   66   73   68   71    67
   5E |   10   13   12   14   13    5    8   16   13   12    4 |   130  132  129  132  124  131  130  132  132  129   130
   6  |    8    9    7   11    8    2    7    6   10    9    3 |    25   29   26   25   25   25   29   23   23   25    24
   7  |    5    9    6    8    6    3    8    4    7    7    2 |    22   29   25   24   23   24   29   22   23   25    24
   8  |    5   10    8   13   10    6    8    6   10    8    3 |    20   23   23   22   24   21   23   21   24   23    21
   9  |    6    9    6    9    5    3    9    6    6    8    2 |    23   31   25   24   24   25   31   26   25   29    25
  10E |    7   12    9   38    9    4    8   11   10   12    4 |   225  174  228  231  225  226  229  226  229  226   226
 X11  |    9   11  ---   15   17    8    9    5    8  ---    4 |    19   28  ---   25   24   22   27   22   21  ---    21
  12  |    8   24    7   16   23    4   11    7   10    8    4 |    38   45   35   37   40   37   43   37   40   36    37
  13  |    5   12    6    9    5    3   11    4    8   10    2 |    27   38   27   30   28   30   35   31   33   29    30
  14  |    8   17   12   13   11    7    9    7   15  106    4 |    60   55   58   67   59   62   59   60   66   99    60
  15  |    6   11    7    9   10    3    9    6    9   10    3 |    16   22   13   21   18   18   21   17   17   14    17
  16  |    5   24    7    9   10    5    8    8    8    9    3 |    30   40   27   32   31   28   31   33   35   30    31
  17  |   11   10    6    9    8    4    7    6    9   12    3 |    27   28   22   28   25   26   26   27   24   27    24
  18  |    9   14   12    8    8    5    9    7    7   11    3 |    62   65   59   63   62   60   63   62   64   55    61
  19  |   11   17    5   12    8    4    8    8   11   10    3 |    26   25   25   25   25   25   27   29   26   26    25
  20E |    5   12    9   10   10    4   11    8   10   11    3 |    54   53   50   54   52   52   54   54   53   57    53
  21  |    7   10    6    9   11    3    7    7    5    8    2 |    14   20   15   21   16   17   19   18   18   18    16
  22E |    5    6    8   12   10    4    6    5   10    9    2 |    59   59   61   59   58   58   58   61   60   62    59
  23E |   10   26   14   25   20    6   12   16   17   19    6 |    53   54   55   48   53   53   56   55   57   57    53
  24  |    5   11    6   11    7    3   12    5    8    9    3 |    24   34   26   24   22   25   34   24   24   23    25
  25  |    8   11    8    9   10    3    8    7   11    9    3 |    34   36   39   37   39   35   37   36   34   36    35
  26  |    7   17    7   10    8    3    7    7    6    8    3 |    34   38   35   33   36   33   36   35   32   34    34
  27  |    6   12    8   10    7    3    9    6    9    7    2 |    18   24   22   23   23   21   24   19   23   20    20
  28  |    7   14    7    8   10    6    7    7   10   10    3 |    34   34   31   33   32   33   33   33   34   30    32
  29  |    7   18    8    8   12    2    8    6    9   10    3 |    32   33   30   34   32   32   35   33   35   34    32
  30  |    5   10    4    8    6    2    9    5    6   12    2 |    18   31   21   24   17   21   29   20   19   22    21
  31  |    6   11    6    7    6    4    6    7    9    9    2 |    30   34   31   29   29   30   34   29   30   28    29
  32  |    7    9    7    7    7    2    7    7   11   12    3 |    34   41   36   34   36   35   38   31   37   34    34
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   14    8   13   10    4    8    8    9   21      |T   44   47   45   46   45   45   48   45   46   47    45
 WRMS |    7   14    7   13   10    4    8    6    9    9      |NE  29   34   30   31   30   30   33   30   31   32    30
 MEDI |    7   11    7    9    9    4    8    7    9   10      |MD  30   34   30   30   29   30   34   31   32   30    30



Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the estimated coordinates for the Latitude,
         Longitude and Height components. See Table 5 for the daily summary.

         CLK  - Satellite clocks used.
         EPO  - Mean number of satellite clock epochs available in the daily
                solutions.
         Units: mm.

Table 4.2141   GPS week: 2141   MJD: 59231.0-59237.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3056 |U    8     8    22 |U   10    14    41 |U    9    10    25 |
emr | emr 3044 |U   19    15    45 |U   16    24    64 |U   16    22    46 |
esa | esa 2962 |    12    12    38 |U   11    15    54 |    14    18    41 |
gfz | gfz 3058 |U    9     9    24 |U   10    12    46 |U   11    13    33 |
grg | grg 3057 |U    9    11    28 |U   10    13    46 |    10    13    37 |
igr | igr 3035 |     9     8    26 |    10    14    44 |    11    13    30 |
igs | igs 3044 |     9     8    26 |    10    14    44 |    10    13    31 |
jpl | jpl 3030 |    15    13    41 |U   12    18    53 |    13    16    43 |
mit | mit 3058 |     8     8    25 |    10    14    42 |    10    10    30 |



Table 5: Daily Precise Navigation Summary using the corresponding Centre orbit 
         positions and satellite clock corrections at 15 min intervals.

         Each line gives the daily station RMS w.r.t. the estimated coordinates 
         for the Latitude, Longitude and Height components.
        
         CLK  - Satellite clocks used.
         EPO  - Number of satellite clock epochs available for that day.
         Units: mm.

Table 5.2141.0   GPS week: 2141   Day: 0   MJD: 59231.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |     8     6    23 |    14    21    62 |     7    11    23 |
emr | emr 3072 |    18    13    40 |    17    33    67 |    15    25    44 |
esa | esa 2976 |    12    11    38 |    16    22    63 |    12    17    37 |
gfz | gfz 3071 |     8     7    26 |    15    20    62 |    10    13    30 |
grg | grg 3071 |     8     8    29 |    15    17    57 |     7    12    31 |
igr | igr 3072 |     9     6    25 |    15    22    64 |     9    14    26 |
igs | igs 3072 |     9     6    26 |    14    20    51 |     8    14    28 |
jpl | jpl 3072 |    13    13    46 |    17    26    69 |    10    17    34 |
mit | mit 3072 |     8     8    24 |    15    21    58 |     9    13    30 |

Table 5.2141.1   GPS week: 2141   Day: 1   MJD: 59232.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |     7     8    23 |     9    12    39 |     8    11    24 |
emr | emr 3072 |    18    16    42 |    19    31    71 |    13    20    41 |
esa | esa 2976 |     9    10    36 |    11    14    52 |    13    17    39 |
gfz | gfz 3072 |     9    10    27 |    10    10    44 |    11    11    31 |
grg | grg 3072 |     9    11    27 |     9    10    42 |     8    12    33 |
igr | igr 3072 |     7     7    23 |    10    12    42 |     9    12    26 |
igs | igs 3072 |     7     7    24 |    10    11    41 |     8    12    28 |
jpl | jpl 3072 |    13    14    41 |    11    17    42 |    11    14    39 |
mit | mit 3072 |     7     8    22 |     9    11    40 |     8    11    29 |

Table 5.2141.2   GPS week: 2141   Day: 2   MJD: 59233.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3070 |     8     9    21 |     7    10    43 |     9     8    26 |
emr | emr 2976 |    17    19    48 |    18    20    80 |    19    31    57 |
esa | esa 2976 |    11    11    36 |     9    12    59 |    16    18    42 |
gfz | gfz 3072 |     9     8    25 |     7     8    47 |    13    13    38 |
grg | grg 3072 |     9    10    22 |     8    10    57 |    11    14    37 |
igr | igr 3036 |     8    11    30 |     8     9    44 |    13    13    31 |
igs | igs 2975 |     8    11    28 |     7    10    51 |    12    13    31 |
jpl | jpl 3072 |    17    19    42 |    11    14    57 |    15    19    44 |
mit | mit 3072 |     8    14    28 |     7    10    49 |    13    10    30 |

Table 5.2141.3   GPS week: 2141   Day: 3   MJD: 59234.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3070 |     9     9    21 |    10    12    45 |    11    11    21 |
emr | emr 3072 |    25    17    53 |    14    19    71 |    18    23    49 |
esa | esa 2976 |    13    12    39 |    11    12    59 |    15    18    38 |
gfz | gfz 3072 |     9     9    21 |     9    12    50 |    13    12    34 |
grg | grg 3072 |     9     9    24 |    10    14    51 |    11    15    29 |
igr | igr 2950 |     9     7    28 |    10    13    48 |    12    14    33 |
igs | igs 3069 |    10     9    25 |    10    12    49 |    12    13    26 |
jpl | jpl 2880 |    14    10    42 |    13    17    61 |    14    13    53 |
mit | mit 3072 |     8     7    22 |    12    21    41 |    12    12    29 |

Table 5.2141.4   GPS week: 2141   Day: 4   MJD: 59235.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2975 |     7     7    23 |     9    14    34 |     9    11    27 |
emr | emr 2976 |    18    15    47 |    18    17    52 |    17    17    50 |
esa | esa 2880 |    11    12    39 |    11    16    52 |    16    18    44 |
gfz | gfz 2976 |     8     8    24 |    10    13    44 |    12    15    36 |
grg | grg 2976 |     9     8    25 |     9    16    39 |    15    18    59 |
igr | igr 2976 |     9     8    28 |     9    14    39 |    11    14    33 |
igs | igs 2976 |     8     6    28 |     9    15    38 |    10    12    36 |
jpl | jpl 2976 |    13    13    42 |    11    19    49 |    15    17    51 |
mit | mit 2976 |     9     8    25 |     9    16    38 |    10    11    34 |

Table 5.2141.5   GPS week: 2141   Day: 5   MJD: 59236.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3068 |    11     9    22 |    10    14    30 |    10    10    26 |
emr | emr 3072 |    21    14    45 |    18    26    54 |    14    19    40 |
esa | esa 2976 |    14    13    39 |    10    17    42 |    15    18    44 |
gfz | gfz 3072 |     9     9    27 |     9    12    36 |    11    13    35 |
grg | grg 3070 |     9     7    28 |     8    13    37 |    10    10    29 |
igr | igr 3072 |    12    10    25 |     8    14    31 |    11    13    31 |
igs | igs 3072 |    10     8    29 |     9    15    33 |    10    12    33 |
jpl | jpl 3072 |    15    10    39 |    12    18    42 |    11    16    39 |
mit | mit 3072 |     9     7    27 |     9    13    32 |    10     8    30 |

Table 5.2141.6   GPS week: 2141   Day: 6   MJD: 59237.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10    10    18 |     9    11    35 |     8     9    27 |
emr | emr 3072 |    19    15    38 |    12    22    51 |    15    20    38 |
esa | esa 2976 |    13    14    36 |    10    15    51 |    14    19    40 |
gfz | gfz 3072 |    10    11    20 |    10     9    39 |     9    13    31 |
grg | grg 3069 |    13    24    40 |     9    11    43 |    12    12    41 |
igr | igr 3072 |    12    11    24 |     9    12    40 |    10    13    30 |
igs | igs 3072 |    10     8    25 |     9    12    41 |    10    12    34 |
jpl | jpl 3072 |    17    14    37 |    12    18    51 |    13    17    43 |
mit | mit 3072 |     8     8    25 |     9     8    39 |     9     9    29 |


Table 6: Earth Orientation Parameters weekly summary.                          
                                                                              
        Weekly mean and standard deviation of Centre ERP, ERP rates and       
        LOD differences with respect to IGS combined values. See Table 7 for  
        the daily summaries.                                                  
                                                                              
        Xpole,Xrt: x pole and x pole rate                          
        Ypole,Yrt: y pole and y pole rate                       
        LOD      : Length Of Day                                               
                                                                              
        AC LOD BIAS    : 10-day mean LOD bias with respect to Bulletin A     
        AC LOD BIAS RMS: RMS of AC LOD BIAS                              
                                                                              
        FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
              for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 6.2141   GPS week: 2141   MJD: 59231.500-59237.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      11       2      25       5     -3 |       5     14
            |      12      19      64      77      4 |       3
emr   uuuuu |     -25      -4    -202     -65     22 |      27     36
            |      22      49     110     149      7 |      10
esa   uuuuu |      15      -8      55     -38      5 |      19     25
            |      12      14      39      65      4 |       4
gfz   uuuuu |      15      -1     -28      72     -1 |      30     33
            |      16      18      48     104      7 |       4
grg   uuuuu |       0     -19     -50     -12     -3 |       1     15
            |      16      10      53      57      3 |       2
igr   xxxxx |      14       0       5      44      0 |       4     14
            |      14       9      61      50      4 |       3
irf   xxxxx |     -16      -4       4     -14     -5 |       4     16
            |      12      12      32       8      2 |       2
jpl   uuuuu |      -9      36    -115     -39      3 |      27     31
            |      16      50      80      25     17 |       3
mit   uuuuu |     -25     -10      57      20     -4 |      20     24
            |      21      16     107      37      3 |       2
ngs   uuuuu |      11      10      72      54      0 |      10     19
            |      32      29      49     111      3 |       3
sio   xxxxx |     138      22      38    -292     -7 |      33     38
            |     115      78      83     137     10 |       2


Table 7.2141.0   GPS week: 2141   Day: 0   MJD: 59231.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -3      33      41      62     -1 |       1     12
emr   uuuuu |     -20      13    -332     -83     28 |      14     22
esa   uuuuu |      19     -10     -18     -63     -4 |      13     20
gfz   uuuuu |      11      -3    -104      27     -5 |      25     28
grg   uuuuu |     -18      -9     -88     -44     -5 |      -2     14
igr   xxxxx |      20     -11      38      13      1 |      -1     11
irf   xxxxx |      -3     -25      51     -18     -6 |       0     15
jpl   uuuuu |       8       8    -119     -63      3 |      23     26
mit   uuuuu |       5     -42     220      90    -10 |      17     22
ngs   uuuuu |     -27      37     107       6      1 |       5     16
sio   xxxxx |     163     -38     -31    -121     -7 |      32     36

Table 7.2141.1   GPS week: 2141   Day: 1   MJD: 59232.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      14     -18     -72     153      2 |       3     13
emr   uuuuu |     -36      28    -216    -218     21 |      19     29
esa   uuuuu |      14       8      82    -118      6 |      15     21
gfz   uuuuu |      30      23      15     158      5 |      27     30
grg   uuuuu |      -2      -6    -131      66     -3 |      -1     15
igr   xxxxx |      25      -1      23      28     -1 |       2     12
irf   xxxxx |      -8       9      17     -22     -4 |       3     15
jpl   uuuuu |      -2       0     -60     -16    -26 |      26     30
mit   uuuuu |      -4      -7     105      31     -2 |      19     23
ngs   uuuuu |     -30      -3      88    -122     -3 |       8     17
sio   xxxxx |     103       3      66     -84    -23 |      33     37

Table 7.2141.2   GPS week: 2141   Day: 2   MJD: 59233.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      15     -11     -55     -42     -1 |       4     14
emr   uuuuu |     -58      74    -298     -27     11 |      22     32
esa   uuuuu |       8     -20      55     -78      6 |      16     22
gfz   uuuuu |      33     -23     -35     246      6 |      28     31
grg   uuuuu |      -7     -24     -52     -24     -3 |       0     15
igr   xxxxx |       9       5     -18      52      6 |       2     12
irf   xxxxx |     -31     -13      39     -21     -4 |       3     15
jpl   uuuuu |      -5     147    -262      -8     11 |      25     29
mit   uuuuu |     -38     -13     154     -27     -4 |      20     24
ngs   uuuuu |      50     -39      89      54     -4 |       8     18
sio   xxxxx |     372     185     -96    -330      8 |      31     36

Table 7.2141.3   GPS week: 2141   Day: 3   MJD: 59234.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      24       8      83     -72      0 |       7     14
emr   uuuuu |       9     -77      -2     246     32 |      28     35
esa   uuuuu |       0     -10      23     -30      6 |      20     25
gfz   uuuuu |      23      22     -44     117     -5 |      32     34
grg   uuuuu |       4     -18     -73       0     -7 |       3     14
igr   xxxxx |     -11      11    -126      47      2 |       6     14
irf   xxxxx |     -32      -5     -18      -5     -6 |       6     15
jpl   uuuuu |     -17      33     -79     -42     -7 |      28     33
mit   uuuuu |     -37      -9      48      -2     -1 |      22     26
ngs   uuuuu |       1      -2     -20     -27      3 |      11     18
sio   xxxxx |     129      16     107    -463      2 |      36     39

Table 7.2141.4   GPS week: 2141   Day: 4   MJD: 59235.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -7      13      55      -6     -6 |       9     16
emr   uuuuu |      -7     -38    -136    -106     20 |      34     42
esa   uuuuu |      30     -28      81     -36     10 |      23     28
gfz   uuuuu |     -13     -10     -56       1      7 |      34     36
grg   uuuuu |     -20     -25     -34     -77     -3 |       4     15
igr   xxxxx |       6       6      39     -16      2 |       8     16
irf   xxxxx |     -10      -1     -23      -1     -9 |       7     16
jpl   uuuuu |       6      27    -102     -28     26 |      30     34
mit   uuuuu |     -11     -10     -39      35     -6 |      23     27
ngs   uuuuu |       7      48     125     193     -2 |      13     21
sio   xxxxx |     119      40     138    -346    -10 |      37     41

Table 7.2141.5   GPS week: 2141   Day: 5   MJD: 59236.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      23       7      93     -30     -8 |       5     16
emr   uuuuu |     -38     -21    -187    -116     28 |      35     43
esa   uuuuu |       3      -9      74     -30      4 |      21     27
gfz   uuuuu |       5      -3     -17     -35      0 |      32     35
grg   uuuuu |      12     -20      19      59      3 |       0     15
igr   xxxxx |      23     -14      35      44     -5 |       6     15
irf   xxxxx |     -11      -7     -16     -18     -4 |       2     16
jpl   uuuuu |     -19       9    -167     -38     -3 |      29     33
mit   uuuuu |     -38       3     -40      12     -4 |      19     25
ngs   uuuuu |      29      13      79     103      1 |      10     20
sio   xxxxx |      75     -13      -2    -364    -10 |      32     37

Table 7.2141.6   GPS week: 2141   Day: 6   MJD: 59237.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       6     -18      32     -32     -6 |       6     16
emr   uuuuu |     -27      -8    -243    -148     16 |      41     49
esa   uuuuu |      30      12      85      91      4 |      24     29
gfz   uuuuu |      12     -16      42     -12    -12 |      34     36
grg   uuuuu |      26     -35       8     -61     -2 |       2     16
igr   xxxxx |      27       0      43     143     -3 |       7     16
irf   xxxxx |     -17       9     -24     -16     -3 |       3     16
jpl   uuuuu |     -36      27     -17     -79     19 |      29     33
mit   uuuuu |     -52       9     -51       0     -1 |      20     25
ngs   uuuuu |      46      12      35     169      5 |      12     21
sio   xxxxx |       3     -44      82    -338    -13 |      32     37


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