[IGSREPORT-26796] Wk 2068 IGS Final Orbits

acc acc at igs.org
Thu Sep 12 19:24:46 PDT 2019


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2068   (Aug 25, 2019 - Aug 31, 2019)

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:

igs2068[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs2068[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs2068[0-6].cls  IGS GPS clock combination summary report.
igs20687.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs20687.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   | 18 18 TIXI TIXI
                0  |  EMR   | PTBB
                0  |  ESA   | CEDU COCO DARW DAV1 DGAR FAA1 FALK GRAZ HARB HERS
                0  |  ESA   | HOB2 IRKJ KIRU KOUR MAJU MAS1 MAW1 MOBS NAUR NKLG
                0  |  ESA   | NNOR ONSA POHN PTBB TOW2 VILL CEDU COCO DARW DAV1
                0  |  ESA   | DGAR FAA1 FALK GRAZ HARB HERS HOB2 IRKJ KIRU KOUR
                0  |  ESA   | MAJU MAS1 MAW1 MOBS NAUR NKLG NNOR ONSA POHN PTBB
                0  |  ESA   | TOW2 VILL
                0  |  GFZ   | GODE POHN ANKR GODE POHN
                0  |  GRG   | LPGS IRKJ
                1  |  COD   | DGAR IISC LHAZ TIXI DGAR IISC TIXI
                1  |  EMR   | 18 FAIR NLIB PRDS PTBB
                1  |  ESA   | 18 18 AREG CEDU COCO DARW DAV1 DGAR FAA1 FALK GRAZ
                1  |  ESA   | HARB HERS HOB2 KIRU KOUR LAUT LHAZ MAJU MAS1 MAW1
                1  |  ESA   | MGUE MOBS NAUR NKLG NNOR ONSA POHN PTBB TONG TOW2
                1  |  ESA   | VILL AREG CEDU COCO DARW DAV1 DGAR FAA1 FALK GRAZ
                1  |  ESA   | HARB HERS HOB2 KIRU KOUR LAUT MAJU MAS1 MAW1 MGUE
                1  |  ESA   | MOBS NAUR NKLG NNOR ONSA POHN PTBB TONG TOW2 VILL
                1  |  GFZ   | POHN GODE POHN
                1  |  GRG   | 13 13 IRKJ IRKJ
                2  |  COD   | TIXI ANKR TIXI
                2  |  EMR   | 18 18 CHUR CHUR NLIB
                2  |  ESA   | CEDU COCO DARW DAV1 DGAR FAA1 FALK GRAZ HARB HERS
                2  |  ESA   | HOB2 KIRU KOUR LAUT MAJU MAS1 MAW1 MGUE MOBS NAUR
                2  |  ESA   | NKLG NNOR ONSA POHN PTBB SYOG TONG TOW2 USN7 VILL
                2  |  ESA   | ASCG CEDU COCO DARW DAV1 DGAR FAA1 FALK GRAZ HARB
                2  |  ESA   | HERS HOB2 KIRU KOUR LAUT MAJU MAS1 MAW1 MGUE MOBS
                2  |  ESA   | NAUR NKLG NNOR ONSA POHN PTBB SYOG TONG TOW2 USN7
                2  |  ESA   | VILL
                2  |  GFZ   | 18 18 POHN POHN
                2  |  GRG   | 3 18 22 3 18 22 LHAZ LHAZ ULAB
                3  |  COD   | 18 18 ASCG TIXI ASCG TIXI
                3  |  EMR   | NLIB
                3  |  ESA   | 18 18 CEDU COCO DARW DAV1 DGAR FAA1 FALK GRAZ HARB
                3  |  ESA   | HERS HOB2 KIRU KOUR MAJU MAS1 MAW1 MOBS NAUR NKLG
                3  |  ESA   | NNOR ONSA POHN PTBB SYOG TONG TOW2 USN7 VILL CEDU
                3  |  ESA   | COCO DARW DAV1 DGAR FAA1 FALK GRAZ HARB HERS HOB2
                3  |  ESA   | KIRU KOUR MAJU MAS1 MAW1 MOBS NAUR NKLG NNOR ONSA
                3  |  ESA   | POHN PTBB SYOG TONG TOW2 USN7 VILL
                3  |  GFZ   | BOR1 CNMR POHN ANKR BOR1 CNMR POHN
                3  |  GRG   | 8 18 8 18 GODE GODE
                3  |  JPL   | BAKE
                4  |  COD   | 18 18 ASCG DAV1 NRMD TIXI ASCG NRMD TIXI
                4  |  EMR   | 18
                4  |  ESA   | AREG BOGT CEDU COCO DARW DAV1 DGAR FAA1 GRAZ HARB
                4  |  ESA   | HERS HOB2 KIRU KOUR MAJU MAS1 MAW1 MGUE MOBS NAUR
                4  |  ESA   | NKLG NNOR ONSA POHN PTBB TONG TOW2 USN7 VILL AREG
                4  |  ESA   | BOGT CEDU COCO DARW DAV1 DGAR FAA1 GRAZ HARB HERS
                4  |  ESA   | HOB2 KIRU KOUR MAJU MAS1 MAW1 MGUE MOBS NAUR NKLG
                4  |  ESA   | NNOR ONSA POHN PTBB TONG TOW2 USN7 VILL
                4  |  GFZ   | 13 GODE POHN GODE NYAL POHN
                4  |  GRG   | BOGT BARH BOGT TRO1
                4  |  MIT   | BOGT
                5  |  COD   | 18 18 ASCG TIXI TLSE ASCG TIXI TLSE
                5  |  EMR   | 18 18 YAR2 SYOG YAR2
                5  |  ESA   | CEDU COCO DARW DAV1 DGAR FAA1 GRAZ HARB HERS HOB2
                5  |  ESA   | KIRU KOUG MAJU MAS1 MAW1 MOBS NAUR NKLG NNOR ONSA
                5  |  ESA   | POHN PTBB TONG TOW2 USN7 VILL CEDU COCO DARW DAV1
                5  |  ESA   | DGAR FAA1 GRAZ HARB HERS HOB2 KIRU KOUG MAJU MAS1
                5  |  ESA   | MAW1 MOBS NAUR NKLG NNOR ONSA POHN PTBB TONG TOW2
                5  |  ESA   | USN7 VILL
                5  |  GFZ   | GODE KOKB POHN SAVO WTZR GODE KOKB POHN SAVO WTZR
                5  |  GRG   | 15 18 13 15 18 NNOR DARW NNOR SAMO TWTF
                6  |  COD   | 18 21 18 21 ASCG QAQ1 ASCG
                6  |  EMR   | MCM4 CHUR FAIR MCM4 QAQ1
                6  |  ESA   | 18 AREG BRST CEDU CHUR COCO DARW DAV1 DGAR FAA1 FLIN
                6  |  ESA   | GRAZ HARB HERS HOB2 KIRU KOUG MAC1 MAJU MAS1 MAW1
                6  |  ESA   | MGUE MOBS NKLG NNOR ONSA POHN PTBB SCOR TOW2 USN7
                6  |  ESA   | VILL AREG BRST CEDU CHUR COCO DARW DAV1 DGAR FAA1
                6  |  ESA   | FLIN GRAZ HARB HERS HOB2 KIRU KOUG MAC1 MAJU MAS1
                6  |  ESA   | MAW1 MGUE MOBS NKLG NNOR ONSA POHN PTBB SCOR TOW2
                6  |  ESA   | USN7 VILL
                6  |  GFZ   | KOKB POHN KOKB POHN
                6  |  GRG   | 18 18 22 HOFN MAC1 HOFN MAC1
                6  |  JPL   | MCM4 POLV MCM4 NRIL POLV
                6  |  MIT   | 18

 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  |  COD   |   4
                1  |  COD   |   4
                2  |  ESA   |   4
                3  |  COD   |   4
                3  |  ESA   |  18
                3  |  GRG   |   8
                5  |  COD   |   4
                6  |  COD   |   4

 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 G04 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |
           PRN G08 |  4 |  4 |  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.

 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 |     .5    -.0    1.2      14     31    -10    -.59
       EMR  |   0 |    4.2   -1.6   -1.3     -46     58    -12     .04
       ESA  |   0 |     .2    -.6    -.6       4     19     22    -.67
       GFZ  |   0 |     .4     .5    1.2      40     25     13    -.61
       GRG  |   0 |    2.6    1.6   18.6      67     30     89    -.31
       JPL  |   0 |    6.1    3.4   -1.9       6     -4    -14    -.71
       MIT  |   0 |    -.8    2.5    3.6      -5     53    -13    -.21
       NGS  |   0 |    -.6   -6.7   -1.0     -15     44     -2    -.24
       SIO  |   0 |   -3.6   -2.0   -7.6      10     -3    -25    -.30

       COD  |   1 |     .6     .1    1.6      17     28     -8    -.57
       EMR  |   1 |   -2.0   -1.2     .6     -30     69   -108    -.28
       ESA  |   1 |     .3    -.0    -.1       6     29     11    -.73
       GFZ  |   1 |     .3     .6    1.5      34     21     29    -.60
       GRG  |   1 |    -.4     .9   -1.2      98      6    124    -.30
       JPL  |   1 |    9.0    3.9    2.3       1      0      1    -.68
       MIT  |   1 |   -3.8    -.7    6.1      -7     42     -4    -.30
       NGS  |   1 |   -1.8   -2.1  -10.6      25     49    -22    -.13
       SIO  |   1 |   -5.3    1.9    -.6      11      3     -6    -.31

       COD  |   2 |     .6     .3    2.0      18     31    -17    -.70
       EMR  |   2 |   -1.1   -5.1   -1.8     -35     68    -97    -.34
       ESA  |   2 |    -.0    -.4    -.3      11     38     15    -.69
       GFZ  |   2 |     .3     .8    1.7      35     17     25    -.77
       GRG  |   2 |    1.1    -.8   17.9      85      2     98    -.23
       JPL  |   2 |    3.7   -3.5    1.6       6      7      7    -.63
       MIT  |   2 |   -2.3    -.5    4.1       6     38    -18    -.28
       NGS  |   2 |   -1.8   -6.4  -12.7      26     39    -28    -.51
       SIO  |   2 |   -2.9    1.9   -3.2      -1      4     -9    -.30

       COD  |   3 |     .7     .2    1.8      10     23     -5    -.67
       EMR  |   3 |    8.2    4.4   -1.3     -31     43    -26    -.28
       ESA  |   3 |    -.6   -1.1     .3      11     42     40    -.69
       GFZ  |   3 |     .1     .9    1.1      45     28     22    -.72
       GRG  |   3 |   -1.4    -.7   22.8     104     26     81    -.24
       JPL  |   3 |    1.8     .1   -2.0      -4      3      6    -.73
       MIT  |   3 |   -1.7   -1.6    8.6      13     32    -20    -.27
       NGS  |   3 |   -6.7    1.7   -4.1      -6     59    -24    -.48
       SIO  |   3 |   -2.9    5.1   -1.8      -2     22     -7    -.34

       COD  |   4 |     .6     .2    1.4      14     27     -8    -.68
       EMR  |   4 |    1.3    2.7   -3.7     -38     77   -107     .01
       ESA  |   4 |     .4    -.9    -.2      10     27     29    -.53
       GFZ  |   4 |     .5     .8    1.1      36     20     23    -.65
       GRG  |   4 |    -.7    3.9   28.9     113     24     51    -.05
       JPL  |   4 |    8.2   -2.2   -2.7     -12      3     -1    -.61
       MIT  |   4 |   -2.5     .4    2.6      18     43    -13    -.25
       NGS  |   4 |    -.3   -2.2   -3.3     -16     48     -8    -.32
       SIO  |   4 |   -2.3    3.1  -12.8      22      2    -15    -.44

       COD  |   5 |     .3    -.0    1.6      12     26     -6    -.50
       EMR  |   5 |    5.4   -2.3    -.7     -10     79   -132    -.06
       ESA  |   5 |     .3    -.3     .3       5     40     24    -.63
       GFZ  |   5 |     .4     .6    1.5      42     22     22    -.54
       GRG  |   5 |    2.4   -3.2    8.8      79      9     75    -.22
       JPL  |   5 |    6.8   -5.6    -.4       8     -3    -15    -.45
       MIT  |   5 |   -3.3    -.9    1.8      -5     44    -12    -.15
       NGS  |   5 |   -3.0   -5.8   -5.6     -16     32     -4    -.30
       SIO  |   5 |   -3.5   -1.9   -6.1      -9     14     -1    -.15

       COD  |   6 |     .5    -.3    1.8       6     29      5    -.53
       EMR  |   6 |    4.2    2.6   -8.0     -52     73    -73    -.11
       ESA  |   6 |     .3    -.4     .3       3     25     32    -.64
       GFZ  |   6 |     .3     .3    1.5      35     25     21    -.55
       GRG  |   6 |    2.3    1.0   13.3      89     26     64    -.08
       JPL  |   6 |    7.4   -4.0   -5.4      12      4     -9    -.69
       MIT  |   6 |    1.7   -2.0    3.4       0     65    -49    -.36
       NGS  |   6 |   -2.1   -5.3  -16.1      13     -3      3    -.38
       SIO  |   6 |    6.0    5.0    3.8       0    -55    -40    -.72


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 1.2068.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2068.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 2.2068.[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 3.2068.[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 5.2068.0-6). 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 2068 summary.                       (Aug 25, 2019 - Aug 31, 2019)

Table 1.2068.a   GPS week: 2068   MJD: 58720.000-58726.000

         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  257|    0     0     0    10    17    14  -.04    9    9 |    -682      16      6     87
        |    0     0     1    13    14    11   .04           |     286     374
emr   79|   -1     0     0   -21     1    28   .14   12   12 |  151909     336     16     94
        |    1     2     1    14     8    20   .03           |   17328     709
esa  150|    0     0     0   -20    -3   -11  -.08    9    9 |    2505    -576      7    150
        |    0     0     1     8     6     9   .03           |    2661    2337
gfz  183|    0     0     0    -5    -3   -13   .05    9    9 |      96    -157     11    176
        |    0     0     2     7     7    15   .02           |     229     411
grg   97|    3     0    10   -14    -9    84  -.07   20   16 |     -48     -37     12    160
        |    0     0     6    14     9    45   .03           |     119     304
igr  n/a|    0     0     0   -14   -32   -14  -.04    4    4 |   22242    1634     10     63
        |    0     0     0     8     5    12   .01           |    3696     789
jpl   80|    0     0    -2    19    11   -15   .16    8    8 |  212696     364      8     98
        |    0     1     1    12    12    11   .02           |     775     624
mit  349|    0    -2     8   -30   -24     8  -.08   15   14 |    -306     -21     80   1662
        |    0     0     0     8    13    14   .02           |     327     313
ngs  213|    0     0    -5    40    -2   -15  -.11    8    7 |    -667     -19   1018   2116
        |    0     0     3    18    10    20   .02           |     212     258
sio  284|    0     0     5   -30   -16   -22   .03   15   15 |     ---     ---    ---    ---
        |    1     0     1    23    28    74   .07           |     ---     ---


Table 1.2068.b   GPS week : 2068   MJD: 58720.000-58726.000   

         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  |    4    4    4    4    0    6    4 |
   3  |    4    5    5    4    4    4    4 |
   4  |    0    0    0    0    0    0    0 |
   5  |    5    5    4    4    4    4    4 |
   6  |    3    3    3    3    3    3    3 |
   7  |    3    3    4    4    3    3    4 |
   8  |    4    4    4   10    5    4    4 |
   9  |    3    4    3    4    4    4    4 |
  10  |    4    4    4    4    4    4    4 |
  11  |    4    4    4    4    4    4    4 |
  12  |    4    4    5    4    4    4    4 |
  13  |    4    4    4    4    4    5    4 |
  14  |    4    4    4    4    4    3    3 |
  15  |    4    4    4    4    4    5    4 |
  16  |    5    5    5    5    5    5    5 |
  17  |    3    4    3    4    4    4    3 |
  18  |    3    3    3    4    3    3    3 |
  19  |    4    4    4    4    4    4    5 |
  20  |    4    4    4    4    4    4    4 |
  21  |    4    4    4    4    4    4    4 |
  22  |    4    4    5    4    4    4    5 |
  23  |    4    5    5    5    5    5    5 |
  24  |    3    3    3    3    4    3    3 |
  25  |    3    4    4    4    4    4    4 |
  26  |    4    3    3    4    3    3    3 |
  27  |    4    4    4    4    5    4    5 |
  28  |    4    4    4    4    4    4    4 |
  29  |    4    4    4    4    4    4    4 |
  30  |    3    3    3    3    4    3    3 |
  31  |    3    3    3    3    4    3    4 |
  32  |    3    4    4    3    4    4    4 |



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 2.2068.0   GPS week: 2068   Day: 0   MJD: 58720.000                            

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  259|    0     0     0    16    39    16   .02   10   10 |    -562    -190      6     75
emr   80|    0    -2     0   -36    13    54   .09   11   11 |  140221    1450     14     94
esa  150|    0     0     0   -33    -2    -2  -.08    9    9 |   -2323    1802      8    150
gfz  186|    1    -1    -2     5    -2    -8   .07    9    9 |    -110     584     13    179
grg   99|    2     0    12   -18   -12    -1  -.10   14   13 |    -219     313     10    156
igr  n/a|    0     0     0   -23   -36   -12  -.04    4    4 |   16646    2945     11     54
jpl   80|    0     0    -2    20     4   -17   .15    7    7 |  211591    1249      7     77
mit  349|    1    -1     7   -30   -27     6  -.10   16   15 |    -902     451     56   1868
ngs  214|    0     0    -2    35   -11   -10  -.10    6    6 |    -553    -217    982   2224
sio  324|   -1     0     4   -38   -17    -8   .02   15   15 |     ---     ---    ---    ---

Table 2.2068.1   GPS week: 2068   Day: 1   MJD: 58721.000                            

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  256|   -1     0     1   -15    13     0  -.07   10   10 |    -888     268      6     85
emr   80|   -1    -2     1   -28    -6    32   .10   11   11 |  177231    -162     17     87
esa  150|    0     0     0    -8    -3   -22  -.07    9    9 |    3575     123      7    141
gfz  181|    0    -1    -2     3     1   -14   .06   11   11 |     306    -320     11    191
grg   97|    2     0    -2   -13   -10    49  -.08   13   11 |     -22      32     10    146
igr  n/a|    0     0     1   -24   -32     0  -.03    3    3 |   19364    1426     10     66
jpl   80|    0     2     0    10     0   -24   .18    8    8 |  212526     -96      7    113
mit  350|    1    -2     9   -24   -12     0  -.07   15   14 |     -90     -96     98   1666
ngs  214|    0     0    -7    42     2     8  -.10    8    7 |    -845     190    876   1975
sio  322|    0     0     6    -9    18    -3   .05   15   15 |     ---     ---    ---    ---

Table 2.2068.2   GPS week: 2068   Day: 2   MJD: 58722.000                            

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  258|    0     0     0     0     1     9  -.09    8    8 |    -664      54      5     81
emr   80|   -1     0     0    -7    -8    33   .13   11   11 |  177260    -425     18    100
esa  150|    0     1     1   -11     3   -16  -.05   10   10 |     930   -1832      8    154
gfz  182|    0     0    -1   -11    -2   -21   .03    9    8 |     -69    -154     10    158
grg   99|    4     0    11   -33     7    92  -.04   18   16 |      79    -242     12    150
igr  n/a|    0     0    -1   -10   -24     0  -.04    4    4 |   20942    1238     11     64
jpl   80|    0     0    -1    10     8    -1   .17    8    8 |  212580    -149      9     98
mit  350|    1    -2     8   -46   -25    20  -.08   14   13 |    -296      -1     87   1519
ngs  210|    0     0   -11    80    11   -31  -.09    9    7 |    -785     182    868   2191
sio  325|    0     0     6   -47   -24    -6  -.05   14   13 |     ---     ---    ---    ---

Table 2.2068.3   GPS week: 2068   Day: 3   MJD: 58723.000                            

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  258|    0     0     0    15     0    29  -.05   10    9 |    -352    -325      7     82
emr   79|    0     1    -2     0     6    36   .13   14   12 |  141916     371     19    101
esa  150|    0     0     0   -29   -17   -19  -.13   10    8 |    2834     797      8    139
gfz  182|    0     0    -1   -14   -14   -24   .05    9    9 |     125    -467     13    145
grg   96|    3     0    15   -19   -20   105  -.09   39   18 |    -194     251     14    157
igr  n/a|    0     0     0   -14   -41   -34  -.07    4    4 |   22350    1617     11     62
jpl   80|    1     0    -2    18    31   -32   .20   10    8 |  212628     401     10     85
mit  349|    0    -2     7   -26   -17    34  -.06   16   14 |    -338    -124     81   1547
ngs  215|   -1     0    -4    28    -6   -23  -.13    9    8 |    -357    -321   1218   2269
sio  327|   -1     0     3    -3    14    29   .01   16   15 |     ---     ---    ---    ---

Table 2.2068.4   GPS week: 2068   Day: 4   MJD: 58724.000                            

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  260|    0     0     0    18    21     1  -.03    9    9 |    -834     233      7     89
emr   80|   -1     1    -2   -26    -3     0   .17   11   11 |  141577    -252     16     88
esa  150|    0     0    -2   -19    -4    -5  -.07    9    9 |    2341    1097      8    147
gfz  183|    0     0     0    -5     7   -34   .03   10    9 |    -206     139     11    164
grg   97|    4    -1    18    13   -16   127  -.06   18   18 |      86    -585     16    168
igr  n/a|    0     0    -1   -16   -33   -25  -.04    4    4 |   23439    1006     11     61
jpl   80|    0    -1    -3     4    27    -8   .15    8    8 |  212454    -281     10    100
mit  349|    0    -2     7   -30   -51     1  -.10   15   13 |     182    -573     97   1702
ngs  216|    0     1    -3    36     9    12  -.10    9    8 |    -825     207   1175   2120
sio  320|    0     0     4    -5   -50   -13  -.02   14   14 |     ---     ---    ---    ---

Table 2.2068.5   GPS week: 2068   Day: 5   MJD: 58725.000                            

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  257|    0     0     1    22    32    26  -.00    9    8 |    -354    -497      6     98
emr   80|   -1     0     0   -13     3     0   .15   13   13 |  142013    1112     16     93
esa  150|    0     0    -2   -21     1   -18  -.08    9    9 |    4074    -948      7    154
gfz  185|   -1     0     0    -6    -8     9   .08    9    9 |     228    -224     10    216
grg   95|    5    -1     6   -12   -15   114  -.04   17   16 |     -51      29     14    156
igr  n/a|    0     0     0    -1   -30   -21  -.04    4    4 |   25190    2448     11     67
jpl   80|    0     0    -4    36     2   -21   .14    8    8 |  212901    1173      9    111
mit  349|    0     0     8   -37   -22     6  -.06   16   15 |    -345       3     76   1698
ngs  214|    0     0    -2    23   -18   -41  -.12    7    6 |    -439    -339   1021   2076
sio  324|   -2     0     6   -53    -1    30   .01   15   14 |     ---     ---    ---    ---

Table 2.2068.6   GPS week: 2068   Day: 6   MJD: 58726.000                            

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  256|    0     0     1    16    18    19  -.07    8    8 |   -1124     570      7    105
emr   80|   -2     3     0   -36     7    37   .17   13   13 |  143150     261     16    100
esa  150|    0     0    -1   -20    -2     3  -.07    9    8 |    6107   -5076      7    167
gfz  182|    0     0     3   -10    -5     0   .04    8    8 |     399    -659     11    185
grg   99|    3     0    13   -17     0   102  -.10   19   17 |     -17     -60     14    192
igr  n/a|    0     0     0    -8   -30    -9  -.05    4    4 |   27769     758     11     73
jpl   80|    0     0    -3    35     4    -2   .15    8    8 |  214192     255     10    103
mit  349|    0    -2     8   -22   -11    -7  -.09   15   15 |    -358     187     66   1640
ngs  213|    0     0    -9    35    -2   -20  -.13    8    7 |    -866     163    989   1960
sio   48|    1     2     5   -57   -53  -185   .17   20   19 |     ---     ---    ---    ---

       
       
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 3.2068.0   GPS week: 2068   Day: 0   MJD: 58720.000                            

        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  |    8    8    7    5   11    2    6   10    5    9    2 |    20   24   22   22   23   20   23   22   19   25    21
   2  |   10    7    6    6   14    4    4   23    7   19    3 |    18   20   18   17   18   18   19   29   18   18    17
   3E |   10    8   17   11   16    4    9   17    6   11    4 |    31   29   24   35   23   29   30   25   32   35    28
  X4  |  406  ---    2  ---  ---   48  ---  ---  ---  ---    0 |    90  ---  207  ---  ---  270  ---  ---  ---  ---   215
   5  |   13   11    5   21   23    3    9   16    6   14    4 |    36   36   35   40   33   36   37   38   38   40    36
   6  |    8   10    7   10   13    3    7   12    5    8    3 |    25   30   27   24   28   25   30   26   28   29    26
   7  |    8    9    7    9   14    4    6   18    4   16    3 |    32   28   28   32   30   28   29   27   27   28    28
   8  |    9   13   15   10   15    3    9   11    8    8    3 |   843  839  839  838  842  841  840  844  841  842   840
   9  |    7    9   12    8   11    3    7   14    4    9    3 |    27   29   30   26   25   27   31   25   28   33    28
  10E |    8   11   15    8   13    3    8    8    6    9    3 |    64   64   59   64   60   60   65   57   62   65    63
  11  |    8   11   15    8   14    4    8    9    7   16    3 |    19   25   19   20   16   17   23   19   19   12    17
  12  |   10   14    7   12   14    3    5   20    7   19    4 |    21   22   19   27   24   20   21   23   21   17    19
  13  |    9   11    8    9   15    3    8   16    6   17    3 |    27   35   30   29   37   30   36   32   32   34    30
  14  |   14    9    7    6   12    3    6   17    7   18    3 |    35   29   29   30   33   29   29   30   28   33    28
  15  |    8   10    7   11   15    3    6   19    7   20    3 |    25   28   25   29   25   25   26   22   25   24    24
  16  |   11   22    6    8   13    4    7   25    8   19    4 |    21   25   21   21   23   19   19   23   20   22    18
  17  |   10    7    5    7   14    5    6   16    5   17    3 |    26   23   19   23   26   20   24   22   24   16    21
  18  |    9    7    8    6   11    3    6   12    7    9    3 |    25   25   39   24   22   24   24   28   24   28    24
  19  |   14   12    5    9   17    5    6   19    7   17    4 |    27   26   25   27   27   25   26   31   26   26    24
  20  |    8   11    5   11   16    4    7   16    7   15    3 |    29   26   27   33   29   27   27   26   30   25    27
  21  |    9   12    6    8    9    4    7   15   10   19    3 |    24   24   19   23   19   20   22   24   23   22    20
  22  |   10    8    5   11   25    3    6   19    6   14    4 |    30   28   30   35   36   31   30   31   29   34    29
  23  |    7   22    5    8   13    3    6   22    5   20    4 |    22   26   19   19   19   17   22   21   19   18    19
  24  |    8    9    5    8   11    4    6   11    5   10    2 |    25   33   29   30   25   27   33   30   27   35    28
  25  |   10   11   13    8   10    3    7   10    5   12    3 |    19   22   19   17   21   17   21   20   18   24    18
  26  |   10   10   10    9   18    3    6   12    8   10    3 |    29   32   32   32   30   30   30   32   31   32    30
  27  |   11   10   15   12   15    2    9   11    6   11    4 |    28   27   31   31   29   26   27   27   23   30    26
  28  |    8    8    6   12   10    3    5   17    6   18    3 |    21   21   17   22   24   19   21   23   22   20    19
  29  |   11   16    5    7   13    3    7   16    7   18    3 |    33   29   26   28   32   27   27   30   29   32    28
  30  |    5    8    5   10    9    4    7   11    5   11    2 |    27   33   27   27   24   27   33   25   25   30    28
  31  |    8    7    6    6    8    4    6   13    4   16    2 |    28   32   28   28   28   29   33   27   28   31    28
  32  |   13   10   13    7   12    4    5    9    5    6    3 |    29   28   34   30   28   30   30   28   30   31    29
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   11    9    9   14    4    7   16    6   15      |T   54   54   57   54   53   59   54   53   53   54    57
 WRMS |   10   11    9    9   13    4    7   15    6   15      |NE  62   63   61   62   62   60   62   63   61   62    60
 MEDI |    9   10    7    8   13    3    6   16    6   15      |MD  27   28   27   28   26   27   27   27   27   29    27

Table 3.2068.1   GPS week: 2068   Day: 1   MJD: 58721.000                            

        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  |    6    7    7    7    8    3    6    7    8   10    2 |    23   27   25   26   24   23   28   22   23   27    24
   2  |    9    9    6    9   13    5    5   22    5   20    3 |    23   22   20   21   20   23   22   29   22   23    22
   3  |   11   11   16   12   26    3   10    9    7   12    4 |    34   37   33   36   40   33   35   32   37   38    34
  X4  |  369  ---    1  ---  ---  373  ---  ---  ---  ---    0 |    60  ---  196  ---  ---  127  ---  ---  ---  ---   205
   5  |   12   10    5   31   15    2   12   12    8   11    5 |    45   45   43   52   40   45   44   46   46   47    44
   6  |    7    9    7    9   11    4    7   10    7   12    3 |    27   33   29   28   27   29   33   28   31   34    29
   7  |    6   10    6    8    7    2    7   16    8   16    3 |    28   30   26   29   26   27   28   27   29   31    27
   8  |    8   13   11   16   18    2    9    9    9    9    4 |   869  867  867  864  874  867  867  869  868  869   867
   9  |    6   10   12   10   13    3   10   13    6   12    3 |    30   36   32   30   34   32   37   29   34   36    32
  10  |    8    9   15    8   13    5   10   10    6    9    3 |    43   49   45   46   46   44   42   45   44   45    44
  11  |   14   12   13    9   12    3    7    9   10   18    4 |    24   29   20   24   22   21   26   22   23   17    21
  12  |   12   14    5   10   14    3    4   18    6   20    4 |    25   27   23   28   26   25   27   26   24   27    24
  13  |    8   11    8    9    9    2    9   15    7   16    3 |    34   40   34   36   33   36   40   37   38   40    36
  14  |   12    8    5    8   12    4    5   18    9   18    3 |    35   37   36   37   37   35   35   34   39   36    35
  15  |    8    9    5   10   11    4    6   19    8   19    3 |    31   36   30   35   32   32   31   29   34   32    31
  16  |    8   21    7   11   17    4    6   23    9   20    4 |    22   29   23   22   26   23   22   24   25   25    21
  17  |    8   10    6   11   12    3    7   15    8   17    3 |    26   29   23   28   28   26   28   28   28   26    26
  18  |    7    6    7    7   11    3    5   11   11   12    3 |    31   32   56   32   32   30   28   33   31   33    30
  19  |   14   13    6   14   13    4    7   17    9   18    4 |    28   27   25   30   27   27   27   29   31   27    26
  20  |   10    8    5   11   14    4    8   14    9   15    3 |    31   30   27   33   26   27   25   27   25   27    26
  21  |   11    8    6    8   10    3    8   16    5   21    3 |    25   27   22   25   24   21   24   23   21   23    22
  22  |   10    9    7   15   21    3    8   15    7   11    4 |    35   37   39   42   44   37   37   37   40   39    37
  23  |    9   21    4   10   15    4    7   22    8   22    4 |    22   30   23   23   28   22   27   21   26   20    23
  24  |    7    8    4    7    9    3    7   11   10   11    2 |    37   47   38   39   35   39   44   40   41   47    40
  25  |   10   11   15   12    8    3    7    9    8   16    3 |    23   29   22   26   24   22   25   22   19   30    22
  26  |    8   10   12    8   11    3    6   12    6   12    3 |    36   40   38   36   38   36   35   38   39   40    37
  27  |    8   12   14   17   13    3   10   11   10   13    4 |    29   35   34   34   34   30   29   32   31   36    31
  28  |    9   12    7   11    9    3    6   17   10   19    3 |    25   28   21   26   24   23   26   24   28   21    23
  29  |   12   19    5    9   10    4    9   17    9   18    4 |    32   31   26   30   31   28   29   31   29   35    29
  30  |    7   10    5    8    8    3    7    9    8   10    2 |    31   39   33   34   28   34   38   29   32   36    33
  31  |    8    7    5    8    6    4    8   14    9   18    3 |    28   38   31   31   31   31   37   30   31   34    31
  32  |   18    8   11    8    9    3    4   10    7   12    3 |    34   34   35   34   34   33   33   30   34   35    32
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   11    9   11   13    3    8   15    8   15      |T   57   60   61   58   57   59   58   57   58   59    61
 WRMS |   10   11    9   11   11    3    8   14    7   15      |NE  66   69   66   67   67   65   67   66   67   68    65
 MEDI |    8   10    6    9   12    3    7   14    8   16      |MD  30   33   30   31   31   30   29   29   31   34    30

Table 3.2068.2   GPS week: 2068   Day: 2   MJD: 58722.000                            

        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  |    6    5    7    5   12    3    5    5    8   10    2 |    17   22   21   21   22   18   22   18   19   19    19
   2  |    7    7    8    8   17    4    5   23    9   20    4 |    14   21   18   16   17   17   19   27   20   18    16
   3  |    8    9   16   10   38    2   10   10    8    9    4 |    24   25   23   27   44   23   26   23   25   28    24
  X4  |    1  ---  384  ---  ---   14  ---  ---  ---  ---    0 |    73  ---  234  ---  ---  105  ---  ---  ---  ---   210
   5  |    8   11    8   10   22    3   11   18    9   13    4 |    31   32   31   31   32   31   34   33   35   31    31
   6  |    7    8    7    6   13    3    6    8    9   11    2 |    20   26   23   19   21   20   26   21   21   28    22
   7  |    6   12    7   10   10    3    8   16    7   14    3 |    24   22   20   24   21   20   24   21   23   23    22
   8  |   10   12   14   10   19    3    9   10   12   10    4 |   777  777  776  773  789  776  774  773  777  775   776
   9  |    5   10   13    9   15    4    9    9    6    9    3 |    21   26   23   20   26   21   28   20   23   28    22
  10  |    6   10   15   10   18    2   11   10   10    7    3 |    22   25   23   21   26   23   27   24   32   23    23
  11  |    8   10   14    7   15    3    8    7    7   18    3 |    17   25   17   18   19   16   23   17   19   12    16
  12  |    9   16    9   12   14    4   10   19    9   17    4 |    19   21   17   25   23   19   25   22   25   15    19
  13  |    7   10   10    9   15    3    9   16    7   16    3 |    17   26   17   19   24   18   25   23   18   22    19
  14  |    7    7    8    9   13    4    4   15   11   14    3 |    16   18   18   19   20   17   18   15   20   16    15
  15  |    9    7    7   10   18    4    5   20    9   17    4 |    21   23   20   21   25   20   21   17   24   18    19
  16  |    9   22    9    8   19    5    6   23   12   21    5 |    25   27   26   24   27   23   25   26   25   24    23
  17  |    7    9    6    6   14    4    9   13    8   13    3 |    23   22   18   23   24   20   23   21   23   18    20
  18  |    5    6    8    5   16    3    5    9   12    9    3 |    17   21   62   20   19   20   18   23   21   21    18
  19  |   12   14    6    9   15    5    7   16    6   13    3 |    23   21   21   25   22   21   21   26   22   20    20
  20  |    9    8    8    9   18    4   11   13    9   16    3 |    29   25   25   28   29   25   28   28   28   24    25
  21  |   10   10    9    7   14    4    6   17   11   20    4 |    21   21   19   17   17   16   19   20   15   19    16
  22  |   10   10    6   16   48    4    8   14    6   12    5 |    21   21   19   27   41   19   20   21   21   21    19
  23  |    7   25    5    9   17    3    6   21    6   19    4 |    19   24   17   19   27   16   19   19   20   17    17
  24  |    9    8    9    6   13    5    8   15    9   10    3 |    17   27   24   24   19   19   26   20   19   27    21
  25  |    8   12   15    7   12    4    9    9    9    7    3 |    22   28   22   19   23   18   23   22   22   24    21
  26  |    7   10   12    5   13    3    7   11    6    9    3 |    21   25   24   21   24   21   24   23   19   25    21
  27  |    9   12   15   11   16    4   11   15    8   15    4 |    22   22   23   25   27   20   22   27   20   30    22
  28  |   11    8    5   10   11    4    5   16    6   18    3 |    21   20   17   20   21   18   21   21   20   18    17
  29  |    8   16    7    8   15    5   10   15   12   14    4 |    26   28   23   24   26   23   24   26   22   24    22
  30  |    6    7    5    9   13    3    8   10    6   11    3 |    27   33   27   24   23   25   32   23   26   28    27
  31  |    5    8    6    6    8    3    6   11    7   16    2 |    21   26   22   23   22   21   26   21   21   23    21
  32  |    8    9   12    7   12    4   11    9   10   10    3 |    22   27   28   23   28   24   26   23   28   29    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   11   10    9   18    4    8   14    9   14      |T   46   48   53   46   49   46   48   46   46   46    50
 WRMS |    8   11   10    8   16    4    8   13    7   13      |NE  55   58   57   56   59   54   57   57   56   56    54
 MEDI |    8   10    8    9   15    4    8   14    9   13      |MD  21   25   22   23   24   20   24   22   22   23    21

Table 3.2068.3   GPS week: 2068   Day: 3   MJD: 58723.000                            

        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  |    9    8    9    7   13    2    6    7    5   13    3 |    22   25   20   21   21   21   25   18   20   22    21
   2  |   11    9    7    8   18    4    4   24   10   21    4 |    21   22   20   23   21   22   23   28   25   20    22
   3  |    7   10   16    8   24    3   12   13    8    9    4 |    27   28   27   28   36   24   28   22   25   27    25
  X4  |  392  ---    3  ---  ---  392  ---  ---  ---  ---    0 |   103  ---  274  ---  ---  134  ---  ---  ---  ---   301
   5  |   10   10    5   14   22    2    7   15   10   12    4 |    34   38   31   38   35   34   35   37   37   34    34
   6  |   10    9    7    8   13    3    8    9    6    6    3 |    23   29   26   26   23   23   29   24   25   28    25
   7  |    9   11    5    7   17    4    8   16    5   14    3 |    30   32   28   29   28   28   33   25   30   30    29
   8  |   18   40   25   15  194   10   38   18   18   21   10 |  9999 9999 9999 9999 9999 9999 9999 9999 9999 9999  9999
   9  |    9   11   10    7   25    3    7   11    7   12    3 |    32   34   33   30   34   30   38   26   32   36    31
  10  |    7   11   15    8   20    4   11   12   10   10    4 |    27   33   29   28   32   29   32   29   28   28    28
  11  |   11   12   16    8   19    3    7    7    7   19    4 |    21   28   21   21   19   20   26   18   21   14    19
  12  |    6   16    7   11   17    3    5   18    7   17    4 |    24   28   22   27   26   24   27   25   27   23    23
  13  |    9   11    9    7   15    4    8   19    9   17    4 |    27   36   29   28   31   29   35   30   33   32    29
  14  |    9    9    8    9   14    4    7   15    8   15    3 |    27   30   27   30   28   28   28   26   25   26    26
  15  |   12   10    6   11   17    3    7   23   10   17    4 |    28   31   25   27   27   26   28   19   30   22    24
  16  |   11   19    7    8   19    5    7   25   11   21    4 |    21   28   22   25   25   22   23   23   24   21    20
  17  |   11    7    5    7   16    4    7   17    9   18    3 |    33   30   27   31   30   27   29   28   33   25    28
 X18  |    5    9  210    8   18    4  ---   16    9   13    4 |    26   30  175   28   26   28  ---   31   26   28    26
  19  |   13   14    6    9   16    5    8   20   10   20    4 |    30   30   29   29   32   27   29   30   34   31    28
  20  |    6    8    6    9   20    4    6   16   10   18    3 |    26   27   25   28   30   24   24   27   22   21    23
  21  |    7   10    7    8   17    4    8   17   10   20    4 |    25   28   23   24   23   23   26   26   20   25    22
  22  |   10   11    8   14   32    3    8   15    7   13    4 |    22   25   24   27   37   23   23   21   21   20    21
  23  |   10   24    4   11   23    5    6   24    6   21    5 |    22   29   19   24   27   19   23   20   22   15    19
  24  |    8    9    7    7   13    4    7   11    8    8    3 |    28   37   30   32   26   28   34   28   29   32    30
  25  |    7   13   14   10   15    4    8    9    8   10    3 |    24   29   28   27   28   24   28   24   23   29    24
  26  |   10   10   12    9   12    3    8   11    9    8    3 |    26   28   27   25   27   24   26   24   23   26    24
  27  |    8   14   15   10   18    7    8   13    7   16    4 |    24   27   28   27   32   25   27   30   24   34    25
  28  |   10    9    6    6   15    5    7   17   16   20    4 |    28   26   23   23   28   22   25   24   26   22    23
  29  |    8   13    5    9   16    4    7   17   11   19    4 |    28   29   27   27   31   26   27   27   30   30    26
  30  |   11    9    5    8   19    3    8    9    5    7    3 |    30   35   28   25   23   27   36   24   28   30    29
  31  |    7   12    7    5    9    3    6   13   10   16    3 |    21   31   24   23   23   23   29   20   21   23    23
  32  |    7    9   13    9   13    3    7    8    9   10    3 |    27   28   30   29   31   27   31   25   27   30    27
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   14   10    9   39    4   10   16    9   16      |T   28   29   38   27   28   28   28   25   26   26    34
 WRMS |    9   12    8    9   18    4    8   14    8   15      |NE  25   28   32   26   27   24   27   25   25   25    24
 MEDI |    9   10    7    8   17    4    7   15    9   16      |MD  27   29   27   27   28   25   28   25   25   26    25

Table 3.2068.4   GPS week: 2068   Day: 4   MJD: 58724.000                            

        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  |    7    6    7    8   14    3    6   13    7   11    3 |    20   23   21   21   21   18   24   22   16   22    20
  X2  |    1  ---  ---  ---  ---   29  ---  ---  ---  ---    0 |    53  ---  ---  ---  ---   23  ---  ---  ---  ---    50
   3  |    8    8   15   14   21    3    9   10    8   11    4 |    24   23   21   27   32   21   21   23   20   28    22
  X4  |    1  ---  ---  ---  ---   25  ---  ---  ---  ---    0 |   100  ---  ---  ---  ---   93  ---  ---  ---  ---   217
   5  |   10   14    7    9   21    4    7   15    9   12    3 |    25   28   24   30   30   27   29   30   27   23    26
   6  |    8    9    7    8   15    4    5    8    5    9    2 |    21   25   24   22   22   21   26   22   20   29    22
   7  |    8   12    5    7   15    3    8   14    7   12    3 |    23   26   21   24   23   22   24   23   20   26    22
   8  |   12   12   12   19   26    6   10   13   13   11    5 |   878  878  882  878  869  877  877  878  878  874   878
   9  |    8   10   11    8   19    3    8   11    8   11    3 |    26   29   27   27   30   26   30   26   27   35    27
  10  |    8   10   15    8   21    4    9   13    8    8    4 |    24   26   24   22   27   22   24   26   26   21    23
  11  |   12    9   12    9   20    3    8    8   10   17    4 |    20   25   20   21   17   17   24   20   19   15    17
  12  |   13   14    8    8   18    3    6   19    8   18    4 |    21   24   19   24   24   20   22   22   20   14    19
  13  |    9   11    8    9   17    3    9   18   11   20    4 |    26   30   27   28   33   26   32   28   26   29    26
  14  |   10   10    9    8   15    5    7   15    9   15    3 |    25   26   24   26   26   23   24   26   24   23    23
  15  |    6    8    7    9   18    4    6   23    8   16    3 |    26   29   26   25   28   26   27   21   25   23    24
  16  |    8   23    7   13   19    4    8   24   12   16    5 |    23   31   24   26   24   23   24   23   26   22    22
  17  |    8    8    6    7   17    4    7   15   10   13    3 |    24   25   18   24   27   22   23   23   25   19    21
  18  |    5    7    7   10   20    3    7   10   10    9    3 |    19   21   49   20   20   18   25   23   18   23    18
  19  |   13   12    6    7   18    5    5   19   11   16    4 |    26   21   20   23   26   22   22   26   24   21    21
  20  |    8   10    6   10   20    4    7   17    8   15    3 |    27   25   23   27   27   24   23   28   23   21    23
  21  |    8   10    7    9   19    4    7   17   11   21    4 |    22   23   20   23   23   19   23   25   20   23    20
  22  |    8    7    6   12   28    3    9   16    8   16    4 |    24   24   21   26   32   21   20   26   22   23    21
  23  |   10   23    5   10   21    4    7   22    8   16    4 |    22   27   16   21   25   17   21   20   21   16    18
  24  |    6    9    8   10   16    4    9   15    9    9    3 |    26   32   30   30   24   26   31   26   23   29    27
  25  |   11   13   15    8   16    4    8    9    7   11    4 |    22   27   24   22   26   21   25   21   20   27    21
  26  |    7    8   10    8   16    3    7   13    8   10    3 |    27   29   28   28   29   27   27   28   26   31    26
  27  |   10   13   12   15   18    4   10   18   10   13    4 |    26   29   28   30   32   24   26   30   24   32    26
  28  |    8    9    7    9   14    5    6   18   13   16    3 |    22   23   17   22   23   19   21   21   23   20    19
  29  |    6   14    8    7   19    2    7   17   10   15    3 |    24   25   23   27   31   24   24   27   24   28    23
  30  |   11    9    5   11   18    4   10   11    9   10    3 |    26   34   28   30   24   27   32   25   23   34    28
  31  |   10    9    9    8   13    4    8   14    5   16    3 |    26   30   26   27   23   25   30   25   24   27    25
  32  |   10    9   14    7   13    5    7    8    9    9    3 |    27   31   31   28   28   28   30   29   30   30    28
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   11    9   10   18    4    8   15    9   14      |T   53   54   52   53   54   51   53   53   51   52    56
 WRMS |    9   11    9    9   18    4    8   13    8   14      |NE  63   66   64   65   65   60   65   65   63   64    61
 MEDI |    8   10    7    9   18    4    7   15    9   13      |MD  24   26   24   26   26   23   24   25   23   23    23

Table 3.2068.5   GPS week: 2068   Day: 5   MJD: 58725.000                            

        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  |    8    8    7    7   10    2    5    9    5   11    2 |    18   22   19   17   19   16   21   18   15   22    17
  X2  |   11   10    7    9   17    6  ---   22  ---   20    5 |    21   18   17   20   15   18  ---   24  ---   19    18
   3  |    7    9   14   12   17    3    9   10    6   12    3 |    23   24   20   25   28   21   22   22   22   29    22
  X4E |  416  ---    2  ---  ---  417  ---  ---  ---  ---    0 |   216  ---  366  ---  ---  211  ---  ---  ---  ---   369
   5  |   11   15    6    8   18    4    7   17    8   13    3 |    29   30   28   30   30   27   30   31   30   27    28
   6  |    8    8    6    6   13    3    8   12    7    8    3 |    21   24   20   22   19   20   25   21   22   27    21
   7M |    5   10    7    8   10    3    7   15    7   15    3 |    19   20   17   21   19   17   20   17   16   23    18
   8  |   11   12   14    9   21    7   10   11    9   11    4 |   551  552  555  553  558  556  554  555  557  551   554
   9  |    7   10   12   10   19    3    7   14    8   12    3 |    29   30   30   27   31   27   31   27   29   35    28
  10M |    7   11   16    8   16    5   10    8    7    7    3 |    25   28   24   26   26   23   26   23   24   26    24
  11  |   12   12   13    8   16    3    8    9    9   18    4 |    16   25   17   17   16   16   22   18   16   11    14
  12  |   11   13    8   10   16    3    6   20    8   18    4 |    18   19   16   22   24   16   20   20   19   14    16
  13M |    9   14   10   11   25    4   11   25    9   20    4 |    25   30   25   27   37   25   30   34   29   26    26
  14M |    6   10    8    8   14    3    5   14    7   15    3 |    24   24   22   24   25   21   21   22   22   29    21
  15M |   11   11    8   13   30    3    9   28    9   15    5 |    24   23   22   27   30   21   23   26   23   23    21
  16  |   10   28    6    7   19    4    8   26    6   19    5 |    19   27   20   21   25   18   20   20   19   17    17
  17  |    9    9    7    6   14    4    7   17    8   18    3 |    24   22   16   23   25   19   24   20   23   21    20
  18  |    7    7    8    8   15    3    7   10    7   11    3 |    14   18   39   15   19   14   15   18   15   18    13
  19  |   11   12    6    8   15    5    9   20    7   18    4 |    22   22   21   24   24   20   22   24   19   25    20
  20  |    7   14    6   10   17    4    6   17    6   18    3 |    30   33   28   34   28   28   27   33   30   29    28
  21  |    8   19    8    7   17    5    7   17    6   20    4 |    20   28   16   18   19   16   20   23   16   23    16
  22  |   10   11    7   12   25    3    8   16    7   17    4 |    18   24   19   24   30   20   22   25   21   25    20
  23  |    6   30    5   10   21    4    7   22    9   19    5 |    19   27   18   23   22   17   19   18   21   14    18
  24M |    8   11    6    7   13    3    8   15    6    8    3 |    27   33   29   27   24   27   33   31   23   32    27
  25  |   10   14   14    9   15    4    9    9    5   11    3 |    21   29   19   25   26   20   25   20   19   25    21
  26  |    6    9   11    7   15    3    9   11    8   10    3 |    20   25   23   23   27   20   24   22   23   24    21
  27  |    9   13   14   10   16    4   11   17    7   15    4 |    20   21   23   18   27   18   21   26   21   28    19
  28  |    7   10    5    9   12    4    8   20    8   16    3 |    19   19   15   18   22   15   19   21   15   19    16
  29  |    8   14    7    8   16    4    8   16    8   13    3 |    25   25   22   26   29   23   21   26   24   25    23
  30M |    9    9    6   10   11    3    9   12    8    8    3 |    19   29   24   23   22   22   30   20   20   26    22
  31  |    8   10    7    7   11    4    7   14    7   17    3 |    18   23   16   21   18   17   22   19   19   21    17
  32M |    7   12   13    8   15    4   11   10    7   11    3 |    32   30   35   31   30   31   35   31   31   35    32
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13    9    9   17    4    8   16    7   15      |T   44   42   49   40   41   43   41   40   39   40    48
 WRMS |    8   13    9    9   16    4    8   15    6   14      |NE  45   48   45   46   47   43   47   46   46   46    43
 MEDI |    8   11    7    8   16    4    8   15    7   15      |MD  21   25   21   23   25   20   22   22   21   25    21

Table 3.2068.6   GPS week: 2068   Day: 6   MJD: 58726.000                            

        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  |    8    9    6    7   13    3    6    7    6   21    3 |    17   24   22   19   19   18   23   21   18   30    19
   2  |   10    8    5    8   17    5    5   23    7   23    4 |    14   17   15   15   14   14   15   24   12   21    14
   3  |    6   13   14    8   19    2    8   11    9   21    4 |    21   23   21   22   29   20   21   21   23   32    20
  X4E |  398  ---    2  ---  ---  383  ---  ---  ---  ---    0 |   261  ---  210  ---  ---  250  ---  ---  ---  ---   238
   5  |   10   15    5    8   19    4    7   14    7   17    3 |    27   32   26   32   31   27   29   32   28   31    27
   6  |   10    8    6    6   12    3    6   10    7   18    3 |    23   28   25   21   22   22   27   25   19   30    23
   7  |    8   11    6    8   12    3    8   15    8   37    4 |    25   27   24   28   25   25   28   23   25   43    25
   8  |    9   12   11   12   21    3   11   10   10   20    4 |   372  374  373  369  383  371  375  376  374  379   374
   9  |    8   10   14    7   22    3    8   10    7   17    3 |    29   34   34   28   26   30   33   27   32   35    30
  10  |    8   13   14    9   18    3   10    9    6   14    4 |    28   33   25   28   26   26   31   30   29   35    28
  11  |    9   11   13    7   16    2    9    8    6   19    3 |    19   26   21   22   16   19   25   20   20   27    20
  12  |    7   14    6    9   18    3    6   18    6   23    3 |    18   25   17   23   24   19   23   21   20   26    19
  13  |   10   11    7    9   15    3   11   19    9   20    4 |    17   23   16   20   23   17   26   24   17   27    18
  14  |    7   11    8    7   15    4    8   13    7   15    3 |    18   25   20   22   16   21   23   23   24   23    21
  15  |   10   10    6   10   18    4    7   23   10   19    4 |    27   27   25   27   30   26   27   24   27   31    24
  16  |    7   22    6   11   20    5    7   23    9   21    4 |    22   29   24   25   27   22   22   21   25   28    21
  17  |    9   12    6    5   14    4    6   15    6   13    3 |    27   30   21   25   26   23   26   23   24   26    23
  18  |    6    6    6    6   16    3    7   11    8   24    3 |    19   21   34   19   15   19   21   23   23   29    19
  19  |   18   16    6    8   17    5    6   17    8   22    4 |    32   32   29   29   29   29   28   37   27   40    28
  20  |    8   11    7   10   17    4    8   16    6   20    3 |    33   32   29   36   30   31   32   36   31   34    31
  21  |    7   11    8    8   16    4    7   18    7   18    3 |    23   26   20   22   19   20   24   32   21   30    22
  22  |    7   11    7   14   52    4    7   16    7   17    5 |    24   26   26   30   45   25   24   29   26   31    24
  23  |    8   26    4    8   25    4    8   20    7   21    4 |    20   29   19   20   22   18   21   22   22   17    19
  24  |    6   11    6    9   14    4    6   12    7   12    3 |    40   45   42   42   39   41   45   40   40   44    41
  25  |    9   12   13    6   14    4    8    8    7   18    3 |    20   27   21   22   26   19   26   21   20   29    21
  26  |    5   10    9    4   15    2    8    9    8   13    3 |    24   28   28   27   28   25   25   26   26   34    25
  27  |    9   13   14   10   16    5   12   14    9   22    4 |    23   27   26   25   30   23   27   29   24   34    24
  28  |    7   12    5    9   10    4    7   21    9   18    3 |    21   26   20   22   22   19   22   24   20   23    20
  29  |    7   15    7    6   15    3    8   17    9   18    3 |    34   32   30   32   35   31   32   34   33   34    32
  30  |    9   10    5    9   13    3    8   12    8   18    3 |    22   31   24   24   20   23   30   22   20   30    24
  31  |    6   10    7    6    9    4    9   14    7   27    3 |    26   31   26   27   24   26   30   25   24   33    26
  32  |    8   11   14    6   14    3    8    9    8   16    3 |    34   36   39   34   32   35   36   36   36   42    35
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13    9    8   19    4    8   15    8   20      |T   42   39   41   36   37   41   37   37   35   42    41
 WRMS |    8   13    8    8   17    4    8   15    7   19      |NE  39   43   40   40   41   38   41   42   39   45    39
 MEDI |    8   11    6    8   16    4    8   14    7   19      |MD  23   28   25   25   26   23   26   24   24   31    24



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 4.2068   GPS week: 2068   MJD: 58720.0-58726.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3056 |U   10    15    24 |U   10    17    35 |U    9    12    23 |
emr | emr 2961 |U   15    22    41 |U   15    22    47 |U   15    17    39 |
esa | esa 3044 |    11    14    27 |U   11    17    40 |    10    13    30 |
gfz | gfz 2961 |U   10    15    24 |U   10    17    36 |U    9    12    23 |
grg | grg 2957 |U   11    17    27 |U   11    18    44 |    10    14    24 |
igr | igr 2961 |    10    15    24 |    10    16    37 |     9    12    24 |
igs | igs 2961 |    10    15    26 |    10    17    38 |    10    13    26 |
jpl | jpl 2934 |U   14    20    32 |U   13    22    49 |U   12    13    37 |
mit | mit 2962 |    14    21    40 |U   19    25    71 |U   15    18    41 |



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 5.2068.0   GPS week: 2068   Day: 0   MJD: 58720.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3070 |     9    14    22 |    34    52   100 |     9    10    22 |
emr | emr 2975 |    15    17    48 |    35    56   119 |    11    14    36 |
esa | esa 3072 |     9    12    26 |    34    54   100 |    10    10    30 |
gfz | gfz 2975 |     7    12    21 |    35    52    94 |     8     9    22 |
grg | grg 2970 |    11    15    25 |    37    52    97 |    10    12    26 |
igr | igr 2975 |     9    14    22 |    34    53   107 |     8    10    24 |
igs | igs 2975 |     9    13    25 |    34    53   105 |     8    10    25 |
jpl | jpl 2976 |    13    17    34 |    32    56   127 |    11    15    40 |
mit | mit 2976 |    12    14    37 |    38    49    92 |     9    11    22 |

Table 5.2068.1   GPS week: 2068   Day: 1   MJD: 58721.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    14    16    23 |     7     9    26 |    10    18    29 |
emr | emr 2976 |    15    26    44 |    13    12    35 |    19    24    51 |
esa | esa 3072 |    13    17    25 |     8    10    32 |    12    19    42 |
gfz | gfz 2976 |    13    15    22 |     6    12    29 |     9    14    30 |
grg | grg 2976 |    14    17    23 |     8    12    44 |     9    20    30 |
igr | igr 2976 |    13    17    22 |     7     9    28 |    10    17    33 |
igs | igs 2976 |    13    18    23 |     7    10    31 |    12    19    37 |
jpl | jpl 2976 |    15    24    29 |    12    13    34 |    15    20    46 |
mit | mit 2976 |    20    24    40 |    16    22    70 |    27    31    56 |

Table 5.2068.2   GPS week: 2068   Day: 2   MJD: 58722.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |    13    14    34 |     4    10    25 |     7     8    20 |
emr | emr 2975 |    17    22    39 |    13    12    38 |    11    13    33 |
esa | esa 3072 |    14    13    37 |     6     9    31 |     7     8    25 |
gfz | gfz 2976 |    13    15    34 |     5    11    24 |     7     7    18 |
grg | grg 2975 |    14    17    34 |     6    12    37 |     8    10    18 |
igr | igr 2975 |    13    14    34 |     5    10    25 |     7     8    19 |
igs | igs 2975 |    13    14    36 |     5    11    29 |     7     8    20 |
jpl | jpl 2976 |    16    18    46 |     9    16    38 |    11    14    33 |
mit | mit 2976 |    16    14    41 |    10    15    43 |     9    12    28 |

Table 5.2068.3   GPS week: 2068   Day: 3   MJD: 58723.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10    13    24 |     5    11    24 |    10    14    24 |
emr | emr 2976 |    15    20    50 |    11    17    37 |    18    22    49 |
esa | esa 3072 |    10    14    23 |     8    11    32 |    11    14    27 |
gfz | gfz 2976 |     9    14    25 |     6    11    23 |    10    12    23 |
grg | grg 2970 |    11    15    28 |     7    13    29 |    12    17    28 |
igr | igr 2976 |     9    13    24 |     6    10    26 |    11    15    26 |
igs | igs 2975 |     9    14    27 |     6    11    26 |    13    17    30 |
jpl | jpl 2880 |  ----  ----  ---- |    10    14    35 |  ----  ----  ---- |
mit | mit 2976 |    13    19    35 |    22    19    86 |    14    21    56 |

Table 5.2068.4   GPS week: 2068   Day: 4   MJD: 58724.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2972 |     8    13    27 |     6    12    24 |    12    16    22 |
emr | emr 2880 |    13    22    30 |    11    20    33 |    21    15    30 |
esa | esa 2880 |    11    10    24 |     7    12    30 |    13    15    29 |
gfz | gfz 2876 |     9    14    25 |     6    11    25 |    12    14    24 |
grg | grg 2871 |    10    16    31 |     7    12    30 |    11    15    22 |
igr | igr 2879 |     9    11    22 |     5    11    25 |    13    14    23 |
igs | igs 2879 |     8    12    22 |     6    13    25 |    14    14    24 |
jpl | jpl 2880 |    11    13    25 |     9    18    36 |    16    12    31 |
mit | mit 2880 |    19    26    54 |    19    27    73 |    29    28    71 |

Table 5.2068.5   GPS week: 2068   Day: 5   MJD: 58725.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3070 |     8    15    21 |     6    13    23 |     7    11    19 |
emr | emr 2976 |    14    18    39 |    10    20    33 |    13    14    33 |
esa | esa 3072 |    10    14    27 |     7    12    25 |     8    12    24 |
gfz | gfz 2976 |     9    15    22 |     6    13    32 |     9    15    24 |
grg | grg 2970 |    10    16    25 |     6    13    33 |     9    16    20 |
igr | igr 2976 |     8    14    22 |     5    11    22 |     6    11    18 |
igs | igs 2975 |     9    15    25 |     5    12    21 |     7    11    20 |
jpl | jpl 2880 |    11    20    30 |    11    18    39 |    11    10    34 |
mit | mit 2976 |    10    19    36 |    24    28    97 |    10    10    25 |

Table 5.2068.6   GPS week: 2068   Day: 6   MJD: 58726.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3070 |    11    20    20 |     6    10    26 |     7    10    23 |
emr | emr 2975 |    18    31    37 |    10    18    37 |    14    17    40 |
esa | esa 3072 |    11    22    30 |     7    12    33 |     8    10    35 |
gfz | gfz 2975 |    10    20    22 |     6    10    26 |     8    12    23 |
grg | grg 2971 |    11    22    22 |     7    13    34 |    10    11    24 |
igr | igr 2970 |    11    21    23 |     5    10    26 |     8    10    26 |
igs | igs 2975 |    11    22    24 |     5    11    27 |     8    10    28 |
jpl | jpl 2976 |    15    27    29 |     7    17    34 |    11     8    40 |
mit | mit 2976 |    12    28    35 |     9    14    33 |     9    10    30 |


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 6.2068   GPS week: 2068   MJD: 58720.500-58726.500

                                                         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 |     -34     -23      43     -38      2 |      22     25
            |      22      16     118      48      8 |       1
emr   uuuuu |      13      48       6      47     -6 |      40     45
            |       9      18      58      73     19 |       5
esa   uuuuu |       2      23     -44     -89      4 |      29     31
            |      10      11      43      74      4 |       3
gfz   uuuuu |       8       0     -10      -3     -2 |      31     34
            |      18      11     111     143      3 |       2
grg   uuuuu |      26      -3     -40      -2     -3 |      -3     13
            |      14      20      65      43      4 |       1
igr   xxxxx |      32      10       2      33     -3 |       5     16
            |       6       8      46      41      4 |       2
irf   xxxxx |       8       3     -19     -48      2 |      -2     14
            |      10       8      21      18      4 |       1
jpl   uuuuu |      -9      -9     -18      60     -3 |      47     49
            |      23      11      28      67      2 |       1
mit   uuuuu |      21      28     -33    -146      2 |      27     30
            |      10      14      43      39      3 |       1
ngs   uuuuu |     -14     -51      95      38      3 |      11     18
            |      15      26     102      86      4 |       1
sio   uuuux |      42      42    -116     125      5 |      82     83
            |      36       8      70      76     10 |       2


Table 7.2068.0   GPS week: 2068   Day: 0   MJD: 58720.500

                                                         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 |     -68     -20     -17     -83      3 |      23     26
emr   uuuuu |      12      54      19      70    -32 |      50     54
esa   uuuuu |     -15      42     -55    -121      7 |      26     28
gfz   uuuuu |     -18      -3     -25    -203     -5 |      34     36
grg   uuuuu |      38     -12      44      74      3 |      -2     13
igr   xxxxx |      32      25      23       4     -7 |       7     15
irf   xxxxx |      20       0       5     -32     -2 |       0     14
jpl   uuuuu |      16     -13      -1     149      2 |      48     50
mit   uuuuu |      29      25     -35    -112     -4 |      29     33
ngs   uuuuu |       5     -40      81      42     -3 |      11     17
sio   uuuux |      43      33    -102     168      4 |      80     82

Table 7.2068.1   GPS week: 2068   Day: 1   MJD: 58721.500

                                                         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 |     -41       1      26       7     -4 |      20     24
emr   uuuuu |      21      42      39     -36    -14 |      43     48
esa   uuuuu |      -3      12     -40     -80      7 |      24     27
gfz   uuuuu |       1       2    -177    -112      2 |      30     33
grg   uuuuu |      22     -10      33      10     -2 |      -5     13
igr   xxxxx |      30      11      59      51     -3 |       3     15
irf   xxxxx |       8      -5       6     -41      7 |      -4     14
jpl   uuuuu |      -7      -7      18      20     -2 |      45     47
mit   uuuuu |      30      25      -7    -116      5 |      25     29
ngs   uuuuu |     -16     -63     104     142      2 |       8     15
sio   uuuux |      42      49     -47     163     19 |      78     80

Table 7.2068.2   GPS week: 2068   Day: 2   MJD: 58722.500

                                                         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 |       0     -14     -12      28     -9 |      24     26
emr   uuuuu |      15      33     -60      24    -19 |      43     49
esa   uuuuu |      -3      25     -70     -71      4 |      29     30
gfz   uuuuu |      13      18     -76      51     -6 |      33     35
grg   uuuuu |      17      19     -18     -64      0 |      -2     11
igr   xxxxx |      25      12      27      30     -3 |       6     15
irf   xxxxx |      -9      17     -13     -74     -3 |      -1     14
jpl   uuuuu |     -27      10     -61     -59     -2 |      48     49
mit   uuuuu |      10      23     -18    -151      0 |      28     31
ngs   uuuuu |      -9    -101     309     147      7 |      10     17
sio   uuuux |       7      30     -30     -11    -13 |      83     85

Table 7.2068.3   GPS week: 2068   Day: 3   MJD: 58723.500

                                                         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 |     -19     -27    -117      -6     -2 |      23     25
emr   uuuuu |       2      34      60     -47    -13 |      40     44
esa   uuuuu |      10      33     -36    -162     -3 |      31     34
gfz   uuuuu |      28       8      94     100     -4 |      32     34
grg   uuuuu |      20     -10     -66     -22     -1 |      -1     12
igr   xxxxx |      38      10     -30      35     -8 |       7     15
irf   xxxxx |      11       7     -12     -37      1 |      -2     14
jpl   uuuuu |     -41      -6      -1      58     -4 |      48     50
mit   uuuuu |      26      15      -3    -121      2 |      27     30
ngs   uuuuu |      -1     -54      86      -4      7 |      11     19
sio   uuuux |      23      40     -73     213      1 |      83     84

Table 7.2068.4   GPS week: 2068   Day: 4   MJD: 58724.500

                                                         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 |     -27     -49     262     -55      8 |      21     24
emr   uuuuu |      19      74      59      57      9 |      37     42
esa   uuuuu |       0      20    -105    -177      3 |      30     33
gfz   uuuuu |      10       1     -80     129     -2 |      30     33
grg   uuuuu |      52     -30     -84       9     -6 |      -2     13
igr   xxxxx |      40      10     -59       2     -3 |       5     16
irf   xxxxx |      17       7     -44     -60      5 |      -3     14
jpl   uuuuu |     -24      -5     -12      87     -2 |      47     49
mit   uuuuu |      24      14     -54    -195      4 |      26     30
ngs   uuuuu |      -8     -42      54      -8      4 |      11     19
sio   uuuux |      25      45    -187     158      4 |      82     83

Table 7.2068.5   GPS week: 2068   Day: 5   MJD: 58725.500

                                                         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 |     -45     -31      79     -95     15 |      21     24
emr   uuuuu |      23      29      13     152      1 |      37     42
esa   uuuuu |      13      18     -36     -56      1 |      31     34
gfz   uuuuu |      30     -15      61     147      3 |      29     32
grg   uuuuu |      14      27    -139     -31     -8 |      -2     14
igr   xxxxx |      26      -2     -43      -3     -3 |       4     16
irf   xxxxx |       0       3     -38     -66      5 |      -3     14
jpl   uuuuu |       6     -17     -21     110     -3 |      47     49
mit   uuuuu |       3      48       4    -202      5 |      26     30
ngs   uuuuu |     -31     -23      49     -96      3 |      12     18
sio   uuuux |      38      52    -191      63      4 |      83     84

Table 7.2068.6   GPS week: 2068   Day: 6   MJD: 58726.500

                                                         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 |     -36     -21      78     -63      1 |      22     24
emr   uuuuu |      -1      71     -89     109     23 |      33     38
esa   uuuuu |      11      13      37      42      7 |      30     33
gfz   uuuuu |     -11     -10     135    -132     -2 |      28     31
grg   uuuuu |      20      -4     -47      10     -6 |      -4     15
igr   xxxxx |      34       3      40     113      3 |       2     17
irf   xxxxx |      12      -5     -39     -27      2 |      -3     14
jpl   uuuuu |      17     -23     -49      59     -7 |      45     47
mit   uuuuu |      24      45    -118    -121      0 |      26     29
ngs   uuuuu |     -35     -33     -16      45      3 |      11     18
sio   uuuux |     118      43    -185     120     16 |      82     83


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