[IGSREPORT-22131] Wk 1756 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri Sep 20 09:22:33 PDT 2013


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1756   (Sep 01, 2013 - Sep 07, 2013)

Contacts: J. Griffiths (jake.griffiths at noaa.gov)
          K. Choi (kevin.choi at noaa.gov)


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:

igs1756[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1756[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1756[0-6].cls  IGS GPS clock combination summary report.
igs17567.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs17567.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   | 2 4 9 KOUC KOUC NRMD
                0  |  EMR   | HARB HARB
                0  |  ESA   | 9 ARTU
                0  |  GFZ   | NKLG
                0  |  GRG   | HYDE IRKJ SCOR ARTU HYDE IRKJ SCOR
                0  |  JPL   | 3 4 8
                0  |  MIT   | 2 3 MDVJ
                1  |  COD   | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                1  |  COD   | 21 22 23 24 25 26 27 28 29 31 32 1 2 3 4 5 6 7 8
                1  |  COD   | 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
                1  |  COD   | 26 27 28 29 31 32 ABPO ALIC ALRT AMC2 ANKR AREQ ARTU
                1  |  COD   | AUCK BAKO BJFS BOR1 BRAZ BREW BRFT BRMU BRUX CAGZ
                1  |  COD   | CAS1 CHTI CHUR COCO DAEJ DARW DAV1 DGAR DRAO DUBO
                1  |  COD   | GLPS GOLD GRAS GRAZ GUAM GUAT HARB HERS HERT HOB2
                1  |  COD   | HOFN HOLM IENG KIRU KOUC KOUR LAMA MAC1 MAG0 MAS1
                1  |  COD   | MAW1 MCM4 MDVJ MIZU MOBS NANO NKLG NNOR NRC1 NRMD
                1  |  COD   | NYA1 ONSA OPMT PDEL PIMO POL2 PRDS PTBB QAQ1 RESO
                1  |  COD   | REUN REYK SCH2 SPT0 SYDN SYOG THU3 TIDB TLSE TOW2
                1  |  COD   | TRO1 TSKB TWTF USN3 USNO WAB2 WILL WSRT WTZR XMIS
                1  |  COD   | ZAMB ZECK ABPO ALIC ALRT AMC2 ANKR AREQ ARTU AUCK
                1  |  COD   | BAKO BJFS BOR1 BRAZ BREW BRFT BRMU BRUX CAGZ CAS1
                1  |  COD   | CHTI CHUR COCO DAEJ DARW DAV1 DGAR DRAO DUBO GLPS
                1  |  COD   | GOLD GRAS GRAZ GUAM GUAT HARB HERS HERT HOB2 HOFN
                1  |  COD   | HOLM IENG INVK KIRU KOUC KOUR LAMA MAC1 MAG0 MAS1
                1  |  COD   | MAW1 MCM4 MDVJ MIZU MOBS NANO NKLG NNOR NRC1 NRMD
                1  |  COD   | NYA1 ONSA OPMT PDEL PIMO POL2 PRDS PTBB QAQ1 RESO
                1  |  COD   | REUN REYK SCH2 SPT0 SYDN SYOG THU3 TIDB TLSE TOW2
                1  |  COD   | TRO1 TSKB TWTF USN3 USNO WAB2 WILL WSRT WTZR XMIS
                1  |  COD   | ZAMB ZECK
                1  |  EMR   | CHUR
                1  |  ESA   | 4 4 8 9 NOVM NOVM
                1  |  GFZ   | 4 4 21
                1  |  GRG   | 8 IRKJ NKLG WES2 CAGZ IRKJ NICO NKLG NTUS WES2
                1  |  MIT   | 28 21 28 MDVJ
                2  |  COD   | 1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                2  |  COD   | 21 22 23 24 25 26 27 28 29 31 32 1 2 3 5 6 7 8 9
                2  |  COD   | 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
                2  |  COD   | 27 28 29 31 32 ABPO ALIC ALRT AMC2 ANKR ARTU AUCK
                2  |  COD   | BAKO BJFS BOR1 BRAZ BREW BRFT BRMU BRUX CAGZ CAS1
                2  |  COD   | CHTI CHUR COCO CONZ DARW DAV1 DGAR DRAO DUBO GLPS
                2  |  COD   | GLSV GRAS GRAZ GUAT HARB HERS HERT HOB2 HOFN HOLB
                2  |  COD   | HOLM HRAO HYDE IENG IISC INVK KIRU KOUR LAMA MAC1
                2  |  COD   | MAG0 MAS1 MAW1 MCM4 MDVJ MIZU MKEA MOBS NANO NICO
                2  |  COD   | NKLG NNOR NRC1 NRMD NYA1 ONSA PDEL PIMO POL2 PTBB
                2  |  COD   | RESO REUN REYK RIOP SCH2 SHAO SPT0 SYDN THU3 TLSE
                2  |  COD   | TOW2 TRO1 TSKB TWTF USN3 USNO WAB2 WILL WROC WSRT
                2  |  COD   | WTZR XMIS YAKT ZAMB ZECK ZIMM ABPO ALIC ALRT AMC2
                2  |  COD   | ANKR ARTU AUCK BAKO BJFS BOR1 BRAZ BREW BRFT BRMU
                2  |  COD   | BRUX CAGZ CAS1 CHTI CHUR COCO CONZ DARW DAV1 DGAR
                2  |  COD   | DRAO DUBO GLPS GLSV GRAS GRAZ GUAT HARB HERS HERT
                2  |  COD   | HOB2 HOFN HOLB HOLM HRAO HYDE IENG IISC INVK KIRU
                2  |  COD   | KOUR LAMA MAC1 MAG0 MAS1 MAW1 MCM4 MDVJ MIZU MKEA
                2  |  COD   | MOBS NANO NICO NKLG NNOR NRC1 NRMD NYA1 ONSA PDEL
                2  |  COD   | PIMO POL2 PTBB RESO REUN REYK RIOP SCH2 SHAO SPT0
                2  |  COD   | SSIA SUTH SYDN THU3 TLSE TOW2 TRO1 TSKB TWTF USN3
                2  |  COD   | USNO WAB2 WILL WROC WSRT WTZR XMIS YAKT YSSK ZAMB
                2  |  COD   | ZECK ZIMM
                2  |  EMR   | 9
                2  |  ESA   | 8 CHUR IRKJ ONSA CHUR IRKJ ONSA
                2  |  GFZ   | NKLG NKLG
                2  |  GRG   | 8 IISC IRKJ ABMF IISC IRKJ MAR6
                2  |  JPL   | 9
                2  |  MIT   | 28 9 28 GODE OPMT GODE OPMT
                3  |  COD   | KOUC XMIS KOUC REYK XMIS
                3  |  EMR   | 4 4 MATE
                3  |  ESA   | IRKJ SYOG IRKJ SYOG UNSA
                3  |  GFZ   | NOVM KERG NOVM
                3  |  GRG   | IRKJ REUN SYOG IRKJ SYOG
                3  |  JPL   | 9
                3  |  MIT   | 4 9 21 4 9 21 MATE USNO MATE USNO
                4  |  COD   | KOUC KOUC XMIS
                4  |  ESA   | IRKJ KERG IRKJ KERG
                4  |  GRG   | 4 IRKJ IRKJ
                4  |  JPL   | 4 9
                4  |  MIT   | 4 4 9 NYA1 TSKB NYA1 TSKB
                5  |  COD   | 8 FLRS KOUC NKLG FLRS KOUC MOBS
                5  |  EMR   | 4 4 HARB MCM4 HARB MCM4 PTBB
                5  |  ESA   | 8 CAGZ IRKJ KERG NKLG IRKJ KERG
                5  |  GFZ   | NKLG
                5  |  GRG   | 4 8 IRKJ NYAL POLV TIDB USNO CAGZ IRKJ NKLG NYAL
                5  |  GRG   | POLV TIDB USNO
                5  |  JPL   | 4
                5  |  MIT   | 4 NICO MDVJ NICO NYA1
                6  |  COD   | NYA1 FLRS NYA1
                6  |  EMR   | 4 4 8 HARB HERS YELL
                6  |  GFZ   | 4 4 8 MATE NKLG TSKB
                6  |  GRG   | IRKJ NKLG IRKJ NKLG
                6  |  JPL   | 4 8
                6  |  MIT   | 28 4 9 28 TSKB MDVJ TSKB WTZR

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets. Note that only the largest clock offset and drift are output
    to the summary file. However, the clock combination and the listed RMS
    include all the clock segments. In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                5  |  GRG   | ~08:50 | ~ 0.22 ns
                6  |  GRG   | ~11:07 | ~ 0.14 ns

 6. 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.

 7. 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.

 8. 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 |     .4     .6    -.4     -40     27     -9     .06
       EMR  |   0 |     .4    8.3   16.4       1     20    -19     .19
       ESA  |   0 |    -.5    4.1   16.6      10    -48     34    -.08
       GFZ  |   0 |     .3     .0    -.3     -29     -8     -1    -.33
       GRG  |   0 |    1.9   -3.3   15.7     -17     54    -24     .19
       JPL  |   0 |   -1.8    2.9   14.2     -81     43     18     .04
       MIT  |   0 |     .3    5.4   14.5     -10     12    -50     .26
       NGS  |   0 |    3.9   -3.9   21.1    -117     -6     10     .21
       SIO  |   0 |   -1.7     .3   13.7      10   -195    -72     .10

       COD  |   1 |     .5     .2    -.3     -58     23     -8     .01
       EMR  |   1 |    5.5   11.0   17.6       2     13    -18     .07
       ESA  |   1 |   -2.2    7.4   24.3      15    -56     46    -.01
       GFZ  |   1 |     .7     .5    -.3     -22    -37      5    -.62
       GRG  |   1 |   -5.6    6.7   21.4     -35     60    -13     .40
       JPL  |   1 |   -1.1   10.7   17.6     -78     -7      0    -.06
       MIT  |   1 |   -1.6    6.5   18.3      -6      2    -45     .01
       NGS  |   1 |    1.8    3.4   21.5     -98      0      3     .10
       SIO  |   1 |   -1.6    3.0   25.8      27    101   -152    -.23

       COD  |   2 |     .2     .3     .2     -35     45      5    -.17
       EMR  |   2 |    2.9    7.5   17.3     -15     24    -17    -.31
       ESA  |   2 |    3.9   13.2   20.4      48    -75     53    -.31
       GFZ  |   2 |     .1     .9     .2      -9     -6     -1    -.76
       GRG  |   2 |   -1.9    3.9   21.5      -7     27      5    -.01
       JPL  |   2 |     .8    6.9   11.2     -70     -2     17    -.42
       MIT  |   2 |    2.3    4.8   19.0      -6     17    -48     .05
       NGS  |   2 |    -.3    6.3   23.0     -76      7     -1     .08
       SIO  |   2 |     .5    1.8   17.6      18     42    -86    -.22

       COD  |   3 |    -.2     .0    -.2     -48     46     28    -.07
       EMR  |   3 |    4.8    9.5   12.9     -15     19    -26    -.37
       ESA  |   3 |    1.6    9.3   15.7      59    -54     42    -.23
       GFZ  |   3 |     .1     .5    -.5      -7    -29     11    -.58
       GRG  |   3 |     .8   -1.3   19.2     -11     28    -22     .27
       JPL  |   3 |    4.6     .4   10.8     -88    -40    -22    -.13
       MIT  |   3 |     .9    3.0   22.1     -10     13    -54     .11
       NGS  |   3 |    4.4   -1.3   24.0     -89    -14     13     .17
       SIO  |   3 |    2.3     .0   26.1      49     62      5    -.11

       COD  |   4 |     .5    1.1     .2     -27     49    -15    -.19
       EMR  |   4 |   -2.0    7.5   18.6       9     26    -10    -.09
       ESA  |   4 |   -1.2    5.2   21.2      56   -111     64    -.14
       GFZ  |   4 |     .3     .7    -.3      -8    -29      3    -.66
       GRG  |   4 |    2.5   -1.4   24.7     -16     31     -5     .18
       JPL  |   4 |   -2.9    5.1   18.1     -97     -5    -57     .14
       MIT  |   4 |    1.5     .8   21.1      -7      5    -48     .05
       NGS  |   4 |    5.8   -3.7   25.9    -120    -18     21     .15
       SIO  |   4 |    4.1   -2.2   22.8     103    -76    -25    -.18

       COD  |   5 |     .3     .6    -.6     -37     13    -11    -.11
       EMR  |   5 |   -8.1   11.0   14.1       3     14     -2     .02
       ESA  |   5 |   -1.2    9.1   18.3      26    -97     78    -.07
       GFZ  |   5 |     .0     .5    -.6     -14    -11      7    -.63
       GRG  |   5 |     .1    1.7   22.2     -39     49    -12     .16
       JPL  |   5 |   -2.9    4.9   15.0     -86     -5    -18    -.26
       MIT  |   5 |     .5    3.6   19.1      -6     15    -42    -.01
       NGS  |   5 |   -3.0     .1   22.2     -92     -2    -14     .18
       SIO  |   5 |   -1.4    2.3   12.0      -1     64   -128    -.19

       COD  |   6 |     .3     .2     .3     -48     33     10    -.20
       EMR  |   6 |    4.7   11.1   18.6       2      7    -15    -.03
       ESA  |   6 |   -3.9    9.9    9.7      41    -38     80    -.04
       GFZ  |   6 |     .0     .5     .0     -12    -14     12    -.56
       GRG  |   6 |    2.8   -1.1   23.2     -20     15     -2     .11
       JPL  |   6 |    8.1    7.3   13.9     -79     41    -45     .27
       MIT  |   6 |    5.2    5.8   20.9     -13     11    -51    -.02
       NGS  |   6 |    4.1   -1.1   14.0     -67    -12     20     .46
       SIO  |   6 |     .7    5.4  -10.7      -5    -43    118     .0 


 9. 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.

10. 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.


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 1.1756.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1756.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 2.1756.[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 3.1756.[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 5.1756.0-6). 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 1756 summary.                       (Sep 01, 2013 - Sep 07, 2013)

Table 1.1756.a   GPS week: 1756   MJD: 56536.000-56542.000

         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  245|    1     0    -1    -8    17     7   .17   11   11 |   -1180    -139     16     89
        |    0     0     1     6    30    17   .03           |     483     419
emr   79|    0     1     0   -28    12   -12   .20   18   17 |    2077    -783     19    129
        |    2     1     1    18    23    10   .02           |    1897    1340
esa  150|    0     0    -1    49   -51    17  -.13    7    6 |    -962      57     14    158
        |    0     0     1    18    12    13   .02           |    1141    1890
gfz  186|    0     0    -1     2    15     7  -.58   12   12 |     -13    -113     17    109
        |    1     1     1    38    45    15   .03           |     464     951
grg  132|    1     0     3    -6    34    -9   .42   15   14 |       5    -359     20    268
        |    0     1     2    22    25    17   .03           |     284     795
igr  n/a|   -1     0    -1    -9    18    -5  -.33    5    5 |  -15647    -800     18     95
        |    0     0     0    11    24    12   .03           |    2000    1374
jpl   80|   -1     0    -2   -31    44    -9   .20   16   15 |    1354    -687     18    118
        |    1     1     0    13    22    18   .04           |    1821    1457
mit  233|    1    -1     0   -19     7   -12  -.12   14   11 |      16    -214     27    242
        |    0     0     1    28    34    10   .03           |      89     143
ngs  232|   -1     0     5   -41     1   -22   .12   12    9 |   -1067    -140   1542   3197
        |    0     1     2    44    52    20   .02           |     324     359
sio  452|    0    -1    -7   -38   -16   -93  -.43   18   18 |     ---     ---    ---    ---
        |    0     0     2    46   119    91   .03           |     ---     ---


Table 1.1756.b   GPS week : 1756   MJD: 56536.000-56542.000   

         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  |    5   11    4    4    5    5    4 |
   2  |    7    5    5    5    4    4    5 |
   3  |    4    4    3    4    4    4    4 |
   4  |    6    6   16    6    6    6   12 |
   5  |    5    5    5    5    4    4    5 |
   6  |    4    4    4    4    4    4    4 |
   7  |    5    5    5    5    5    5    5 |
   8  |    6    6    6    5    6    6    6 |
   9  |    7    7    7    7    7    7    6 |
  10  |    4    4    4    4    4    4    4 |
  11  |    4    4    3    4    4    4    4 |
  12  |    6    5    5    5    5    5    5 |
  13  |    4    4    4    4    5    4    4 |
  14  |    5    5    4    4    5    5    5 |
  15  |    4    4    5    5    4    5    5 |
  16  |    5    5    5    5    5    5    5 |
  17  |    5    5    5    5    5    5    5 |
  18  |    5    5    5    5    5    5    5 |
  19  |    5    5    4    5    5    5    5 |
  20  |    4    5    5    5    4    5    5 |
  21  |    4    5    4    5    4    4    4 |
  22  |    4    5    5    5    5    5    5 |
  23  |    4    5    4    4    4    4    4 |
  24  |    5    5    5    4    4    4    4 |
  25  |    4    4    4    4    4    4    4 |
  26  |    4    4    4    4    4    4    4 |
  27  |    4    4    4    4    4    4    4 |
  28  |    5    5    5    5    5    4    5 |
  29  |    5    5    5    5    5    5    4 |
  30  |    0    0    0    0    0    0    0 |
  31  |    5    5    5    5    5    5    5 |
  32  |    4    4    4    4    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 2.1756.0   GPS week: 1756   Day: 0   MJD: 56536.000                            

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  248|    1    -1     0    -9   -13     9   .22   11   11 |    -724    -390     28    123
emr   80|   -4     1     0     9    -4   -20   .19   18   17 |    4787    -815     23    146
esa  150|    0     0    -1    23   -40    14  -.12    6    6 |     566   -2306     25    187
gfz  187|    2     2    -2    -6    41   -10  -.59   13   13 |     198     276     23    132
grg  133|    2     1     3    18    39    -4   .44   15   14 |     129    -141     23    354
igr  n/a|    0     0     0   -22   -21    11  -.37    5    5 |  -12715    -884     21    119
jpl   80|   -3     0    -2   -16    44   -17   .22   16   15 |    3817    -552     19    119
mit  238|    0    -1     0    -8   -45   -24  -.16   14   11 |      72     -98     31    274
ngs  229|   -1     0     3   -47    62    14   .09   13    9 |    -787    -259   1423   3112
sio  455|    0    -2    -6   -40  -238  -103  -.48   19   19 |     ---     ---    ---    ---

Table 2.1756.1   GPS week: 1756   Day: 1   MJD: 56537.000                            

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  250|    0     0    -1    -4     4   -24   .22   12   11 |   -1284     561      0      0
emr   80|    0     0    -1   -28    12   -24   .21   19   18 |    4115   -1947     19    172
esa  150|    0     0     0    42   -49    16  -.15    8    7 |    -444     -17     13    239
gfz  189|    0     0    -2    38   -10    31  -.61   14   14 |     254    -166     14    154
grg  132|    2     2     9   -28    23     1   .42   15   14 |     -78    -276     25    317
igr  n/a|   -1     0    -2     3    14   -17  -.34    6    5 |  -13556   -1916     21    132
jpl   80|   -3     0    -3   -18    41    15   .17   16   15 |    3279   -1878     22    154
mit  230|    0    -2    -2   -26    12   -10  -.13   16   11 |    -107     -48     28    301
ngs  235|    0     0     2   -32    20   -26   .11   12    8 |   -1205      48   1612   3061
sio  458|    0    -1   -11   -32    87  -188  -.43   19   19 |     ---     ---    ---    ---

Table 2.1756.2   GPS week: 1756   Day: 2   MJD: 56538.000                            

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  247|    1     0     0   -17    40     8   .16   10   10 |   -2174     -97      0      0
emr   80|    0     0     0   -44    39    -8   .22   17   16 |    2134    -873     18    122
esa  150|    0     0    -4    49   -44     3  -.14    7    7 |   -2418    1390     12    134
gfz  187|    0     0    -2    45    -6    12  -.56   13   12 |    -203    -121     14    105
grg  132|    0     0     3    27    37    19   .38   15   15 |    -358     325     17    326
igr  n/a|   -1     0    -1    -2    56   -12  -.34    5    5 |  -15410   -1088     17     99
jpl   80|    1    -1    -1   -53    59     5   .26   16   15 |    1527   -1090     17    118
mit  231|    0    -1     0   -17   -28   -12  -.14   12   11 |      61    -207     24    238
ngs  234|   -2     2    10   -49   -11   -19   .13   11    9 |   -1712     584   1531   3089
sio  458|    0     0    -7   -39    24  -136  -.45   17   17 |     ---     ---    ---    ---

Table 2.1756.3   GPS week: 1756   Day: 3   MJD: 56539.000                            

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  249|    0     0    -3     0    20    33   .14   10   10 |   -1176    -505     23    113
emr   80|    1     1     0   -41    -4   -21   .19   17   17 |    1966   -2322     24    110
esa  150|    0     1    -1    77   -57     0  -.15    7    6 |     105   -2637     16    137
gfz  186|   -3     1     0   -55    98    22  -.56   13   13 |     495   -1807     20    103
grg  132|    3     0     0    -4    37   -25   .45   15   14 |      37     -77     23    296
igr  n/a|   -1     0     0   -23    24    11  -.34    5    5 |  -15997   -2270     18     84
jpl   80|    0    -1    -2   -36    -1     5   .19   16   15 |    1120   -2300     18    120
mit  231|    0    -2     1   -40    55     3  -.13   13   11 |     -16    -102     28    227
ngs  234|   -1     0     5   -32   -52   -28   .12   11    9 |   -1149    -519   1925   3435
sio  455|    0    -1    -6   -32    76   -41  -.42   17   16 |     ---     ---    ---    ---

Table 2.1756.4   GPS week: 1756   Day: 4   MJD: 56540.000                            

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  243|    1     0    -2    -4    67     9   .14   10   10 |    -848    -589     26    138
emr   79|   -2     0     1   -26    33    -7   .21   17   17 |    -808    1559     20    126
esa  150|    0     0    -2    70   -75    22  -.13    6    6 |   -2331    2478     17    171
gfz  188|   -1     0     0    -5    30     6  -.58   12   12 |    -915    1412     21    107
grg  132|    0    -1     1    -4    48    -4   .42   14   14 |    -252    -138     22    316
igr  n/a|    0     0    -1     4    29     0  -.31    5    5 |  -18637    1700     17     91
jpl   80|   -2    -1    -1   -22    60   -29   .21   16   15 |   -1649    1934     18    112
mit  232|    1     0     1   -21    11   -16  -.12   15   12 |     -83    -417     30    231
ngs  235|    0     0     6  -102   -25   -21   .16   12    9 |    -897    -302   1593   3532
sio  455|    0     0    -5    41   -82   -66  -.42   17   17 |     ---     ---    ---    ---

Table 2.1756.5   GPS week: 1756   Day: 5   MJD: 56541.000                            

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  241|    1     0    -1   -12    24     0   .16   10   10 |    -887    -215     21    132
emr   80|   -1     1     1   -41    32    -6   .21   16   16 |     913     307     16    115
esa  150|    0     0     0    35   -51    38  -.14    7    6 |    -975     668      9    116
gfz  185|   -1    -1     0    33   -20     0  -.61   12   12 |     216      -6     17     87
grg  132|    1     0     3   -21    66   -21   .45   14   14 |     519   -2112     14    128
igr  n/a|   -1    -1    -2   -18    25   -14  -.34    4    4 |  -16805     289     17     73
jpl   80|    0     1    -2   -39    63   -25   .22   15   14 |     418     425     17    114
mit  235|    2    -1     0    33    32    -1  -.08   14   12 |      50    -247     29    211
ngs  230|   -2     1     3   -68   -55   -56   .10   13   11 |    -850    -240   1416   3263
sio  444|    1    -2    -6   -50    80  -188  -.40   17   17 |     ---     ---    ---    ---

Table 2.1756.6   GPS week: 1756   Day: 6   MJD: 56542.000                            

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  239|    0     0    -3   -15   -19    17   .17   13   11 |   -1170     260     18    121
emr   79|    2     2     3   -26   -20     4   .17   20   17 |    1432   -1393     14    113
esa  150|    0     0    -2    45   -42    29  -.09    8    6 |   -1238     825     10    126
gfz  183|   -1    -1     0   -35   -27    -8  -.55   10   10 |    -140    -379     11     78
grg  133|    1     0     5   -32   -15   -30   .40   15   14 |      43     -95     16    140
igr  n/a|    0     0    -2   -10     2   -15  -.29    5    4 |  -16413   -1432     15     68
jpl   80|   -1     1     0   -36    42   -20   .15   16   16 |     967   -1349     16     91
mit  234|    1     0     0   -57    13   -23  -.09   15   11 |     141    -382     25    214
ngs  227|    0     0     2    44    75   -20   .13   10    8 |    -875    -294   1296   2888
sio  442|    1     0    -7  -117   -61    71  -.40   19   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 3.1756.0   GPS week: 1756   Day: 0   MJD: 56536.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8   16    6   19   14    7   14   12   16   15    4 |   125  121  125  118  122  117  123  126  123  113   122
   2E |   15   19    7   14   14    6   18   35    9   24    6 |    31   32   29   29   30   25   32   34   31   27    27
   3  |    7   11    3   12   16    4    9    8   10   13    3 |    25   27   21   19   27   18   26   22   23   24    21
   4E |   18   33    9   11   15    7   18   13   14   15    6 |    46   58   49   55   45   50   51   55   48   58    48
   5  |   15   19    6   15   13    5   17   12   15   16    5 |    43   50   37   35   39   39   48   36   43   41    39
   6  |    7   12    3   10   14    5    9   12   10   16    3 |    19   22   17   18   26   14   21   20   18   22    17
   7E |   15   18    7   11   20    6   22   10   15   12    5 |    38   28   29   24   27   22   27   26   33   20    27
   8E |   13   23   11   14   16    5   13   14   22   17    5 |    23   32   16   18   21   16   24   23   27   18    16
   9E |   14   21   13   11   16    5   13   26   26   22    6 |    38   43   35   38   40   37   38   49   48   39    37
  10  |   11   13    4   10   15    3    9    9   14   20    3 |    20   26   21   22   29   19   21   25   22   25    21
  11E |    8   13    7   16    9    4   13   12    9   16    4 |    36   34   29   28   37   27   32   33   34   31    30
  12  |   11   20    8   17   19    4   20   16    9   19    5 |    26   29   22   23   33   20   27   29   27   23    23
  13  |    8   17    5   13   13    5   16    7   10   21    4 |    28   34   27   30   43   24   33   27   29   23    28
  14  |   13   19    7   15   10    5   19   10    9   24    4 |    32   32   29   34   36   27   30   32   30   26    29
  15  |    9   20    5   11   12    4   20   11    9   19    4 |    28   27   25   29   34   24   27   30   26   25    25
  16  |   18   19    6   14   13    3   18   15   11   17    5 |    25   24   18   19   26   14   23   16   24   19    17
  17  |    9   16    6   15   18    4   14   13   16   22    4 |    38   35   34   41   45   33   37   37   37   33    35
  18  |    8   19    7   14   13    4   20    9    7   21    4 |    25   33   25   25   30   20   31   26   24   21    24
  19  |    9   19    5   13   15    4   14   11   14   23    4 |    26   29   22   27   34   20   28   26   24   30    23
  20  |    8   19    5   13   13    3   18   12    9   20    4 |    32   32   27   30   38   26   31   32   32   24    29
  21E |   10   15    4   11   16    4   17    8    9   12    4 |    25   23   19   25   25   20   22   21   26   21    20
  22  |    9   17    6   13   12    4   19   12    7   19    4 |    27   32   26   29   37   23   32   31   27   17    27
  23  |    7   19    6   13   10    5   19   10    6   24    4 |    24   28   24   24   32   19   27   24   27   17    24
  24E |    9   12    8   12   10    5   12   17   14   11    4 |    31   25   24   21   28   22   27   28   23   24    24
  25  |   13   16    5   12   11    4   14    8   12   16    4 |    24   30   17   15   28   17   29   19   24   19    20
  26  |    9   14    5    8   14    4   12    8   12   18    3 |    25   25   26   27   35   24   23   29   27   27    26
 X27  |    7   11    5    9  ---    9   13   10   10   16    3 |    28   29   23   19  ---   18   33   20   25   26    24
  28  |   11   16    6   15   20    4   17   16   15   22    5 |    28   29   27   31   38   23   31   28   27   24    26
  29  |   15   20    5   11   18    5   17   10   11   20    4 |    24   30   18   18   26   16   29   21   25   23    19
 X30  |    3  ---  ---  ---  ---   44  ---  ---  ---  ---    0 |    33  ---  ---  ---  ---   80  ---  ---  ---  ---    34
  31E |   11   18    5   13   13    5   19   10   12   19    4 |    34   32   29   30   34   29   29   31   37   24    30
  32  |    7   14    6   11   17    5   12   13    7   21    4 |    16   20   15   18   19   15   21   18   15   21    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   18    6   13   15    5   16   14   13   19      |T   31   33   28   29   35   28   32   31   31   28    28
 WRMS |   11   17    6   13   14    5   15   11    9   19      |NE  27   29   23   25   32   24   28   26   26   24    24
 MEDI |    9   18    6   13   14    5   17   12   11   19      |MD  28   30   25   27   33   22   29   28   27   24    25

Table 3.1756.1   GPS week: 1756   Day: 1   MJD: 56537.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   19   22   13   20   27   15   20   59   29   28   10 |   128  131  133  132  141  131  132  122  133  141   130
   2E |   15   16    8   12   18    5   13   22    9   21    5 |    30   28   28   28   33   25   29   33   30   21    28
   3  |    9   13    5   13   12    5    9   10   10   14    3 |    26   31   22   19   26   18   29   20   26   24    22
   4E |   18   33    8   10   15    6   18   16   12   22    6 |    41   56   46   56   43   48   48   53   47   42    44
   5  |   11   17    8   11   15    5   17   11    6   15    4 |    32   40   27   23   38   28   41   30   35   31    31
   6  |    8   15    5   10   10    5    7   11   10   15    3 |    17   25   17   15   21   12   21   16   19   21    16
   7E |   11   20    7   12   14    4   22    8    9    8    4 |    31   22   24   22   26   20   27   25   25   19    22
   8E |   12   27   14   14   18    5   15   16   19   16    6 |    18   38   21   17   26   17   25   24   25   19    18
   9E |   18   17   18   11   20    6   17   28   21   24    7 |    43   39   38   31   38   34   40   42   41   38    34
  10  |   12   13    5    8   17    3   10   10    6   19    3 |    23   22   20   20   26   19   21   24   23   23    20
  11E |    7   19    7   12   13    5   13   11   11   15    4 |    33   33   27   27   31   24   26   28   32   28    27
  12  |   11   17    7   15   15    5   18   13    6   19    4 |    30   34   25   25   33   25   35   29   30   25    27
  13  |    7   16    7   16   15    2   16   10    9   19    4 |    26   30   26   27   40   22   33   23   26   18    26
  14  |    9   17    7   16   11    5   19    9   10   24    4 |    27   30   28   30   33   24   30   26   24   22    26
  15  |   10   20    6   11   11    7   20   10    8   18    4 |    25   28   21   23   29   20   27   24   25   20    22
  16  |   15   19    6   19   12    3   19   12    8   19    5 |    26   26   20   19   25   15   26   17   20   18    19
  17  |   11   21    6   14   18    6   20   15    9   20    5 |    32   33   28   28   38   27   33   32   33   26    29
  18  |   16   25    7   17   13    5   19   10    9   20    5 |    30   36   28   27   34   24   38   28   30   25    28
  19  |   12   20   10   16   16    4   16   12   11   19    5 |    27   30   23   20   28   18   29   22   22   27    21
  20  |    9   21    6   15   14    4   19   12   12   18    5 |    36   33   30   26   41   28   40   32   39   27    32
  21E |    9   16    7   12   17    5   16   11    9   13    4 |    22   25   21   24   31   19   26   22   22   21    20
  22  |    9   17    6   14   12    4   20   11   10   20    4 |    28   35   28   25   39   23   35   28   28   20    28
  23  |   10   20    7   17   15    4   15    9   10   23    4 |    28   28   27   26   32   21   32   24   25   21    25
  24E |   10   11    6   14   16    6   12   14   13   12    4 |    29   24   21   19   30   19   27   25   26   21    22
  25  |   11   13    6   10   10    6   14    8    7   13    3 |    26   31   22   24   30   23   35   25   29   24    26
  26  |   11   15    5   10   15    3   11    9   10   16    4 |    20   23   17   20   26   16   19   20   22   21    18
 X27  |    9   14    5   11  ---    6   12   11   13   13    4 |    30   32   26   21  ---   21   35   22   28   27    26
  28  |    9   21    7   17   15    5   16   11    9   22    4 |    25   30   23   28   33   22   29   24   28   19    24
  29  |   12   19    7   14   13    7   19    8    8   20    4 |    26   31   20   19   28   19   31   21   25   21    21
 X30  |    3  ---  ---  ---  ---  252  ---  ---  ---  ---    0 |    27  ---  ---  ---  ---  206  ---  ---  ---  ---    26
  31E |   11   19    4   14   11    5   19    9    8   15    4 |    32   26   24   23   31   22   26   24   31   20    25
  32  |    9   15    6   11   16    6    9    9    9   20    3 |    20   22   20   19   25   18   25   16   24   21    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   12   19    8   14   15    6   16   16   12   19      |T   31   33   28   27   35   31   33   29   31   27    28
 WRMS |   11   18    7   14   14    5   15   11    8   19      |NE  26   30   23   23   31   29   30   23   26   22    24
 MEDI |   11   17    7   14   15    5   16   11    9   19      |MD  27   30   24   24   31   22   29   24   26   21    25

Table 3.1756.2   GPS week: 1756   Day: 2   MJD: 56538.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    9   11    8   10   12    8   14   15   10   13    4 |    47   48   48   49   45   47   48   49   50   46    47
   2E |   11   17    6   13   18    4   19   17   11   19    5 |    30   27   28   26   27   24   28   29   30   21    26
   3  |   10   11    4   10   12    4   11    9    7   13    3 |    26   29   22   20   29   19   27   22   23   23    23
  X4E |   12   21  ---  ---  ---   40  ---  ---  ---  ---   16 |    43   61  ---  ---  ---   44  ---  ---  ---  ---    61
   5  |   10   15    7   13   15    5   18   11   10   14    4 |    34   38   28   25   32   29   38   26   33   31    30
   6  |   11   14    5    7   12    4   11   11    9   15    3 |    20   25   19   17   25   15   19   19   16   21    17
   7E |   10   20    7   10   19    4   20   11   10   12    4 |    27   25   22   20   25   19   27   23   29   16    22
   8E |   15   34   10   14   15    6   13   12   12   12    5 |    21   41   11   17   19   13   22   23   21   15    15
   9E |   17   25   12   12   17    8   16   21   21   22    6 |    33   38   23   24   28   22   28   36   37   32    25
  10  |    8   13    3   13   19    4   12    9    9   17    3 |    20   19   18   16   21   20   21   21   19   21    17
  11E |    9   10    4    9   13    5   11    8    9   14    3 |    29   31   26   17   31   21   31   26   26   25    25
  12  |    9   19    8   17   17    6   14   14   14   17    5 |    25   31   20   19   30   18   26   25   25   20    21
  13  |    7   16    6   11   13    2   15   11    9   17    4 |    26   32   22   24   35   21   33   19   27   18    23
  14  |    9   16    7   16   11    6   17   10    9   22    4 |    21   28   21   27   28   23   27   24   25   21    22
  15  |   10   18    6   11   12    3   18   14   13   17    4 |    27   27   22   20   27   20   26   24   30   21    22
  16  |   13   17    6   14   13    3   21   16    9   19    4 |    21   23   17   19   24   15   24   16   20   17    16
  17  |   12   19    4   14   19    4   18   12   13   17    5 |    32   29   25   30   40   23   29   30   29   23    27
  18  |   11   16    5   16   15    4   18   11   11   17    4 |    18   31   20   18   27   17   31   19   23   15    19
  19  |   10   15    7    9   16    4   18   10    8   21    4 |    25   29   24   24   33   21   27   25   22   27    23
  20  |    8   18    6   12   12    5   19   11   12   17    4 |    25   27   22   19   30   21   28   24   30   19    22
  21E |    8   13    7    7   13    5   13   14    7   12    3 |    23   21   21   20   23   20   23   23   21   21    19
  22  |   12   16    6   14   13    4   19   13   13   18    4 |    24   31   21   23   33   19   31   26   27   18    23
  23  |    8   17    5   10   13    3   16   12    5   22    4 |    24   28   19   18   26   18   29   17   24   16    20
  24E |    8   14    7   16   13    5   13   12   15    7    4 |    28   26   23   17   30   23   29   27   35   25    25
  25  |    9   12    7   14   13    5   13    8    7   10    3 |    24   29   21   16   29   18   32   21   22   21    21
  26  |    8   13    4    9   14    5   13   10    6   15    3 |    25   23   21   19   29   20   23   23   29   24    22
 X27  |   10   13    7    6  ---    3   13   10    8   14    3 |    22   26   18   14  ---   15   29   17   21   20    19
  28  |    9   17    9   18   18    4   19   11   16   19    5 |    20   25   20   27   32   15   25   22   23   15    20
  29  |   12   19    9   16   18    7   16    9   10   20    5 |    23   29   19   16   24   16   27   18   23   19    18
 X30  |    3  ---  ---  ---  ---   79  ---  ---  ---  ---    0 |    51  ---  ---  ---  ---   60  ---  ---  ---  ---    49
  31E |   10   17    6   12   15    4   20   12   11   13    4 |    29   28   20   22   28   22   26   28   33   21    24
  32  |   11   13    7   11   14    6   11   10   11   15    4 |    18   19   18   17   15   14   20   14   15   18    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   17    7   13   15    5   16   12   11   17      |T   26   29   21   21   28   22   27   23   26   21    24
 WRMS |   10   16    7   12   15    5   15   11    9   17      |NE  25   27   20   20   28   20   27   21   24   20    22
 MEDI |   10   16    6   12   14    4   16   11   10   17      |MD  25   28   21   19   28   20   27   23   25   21    22

Table 3.1756.3   GPS week: 1756   Day: 3   MJD: 56539.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8    9    6   14   14    6   12   14   11   13    4 |    51   48   48   54   48   49   50   46   50   50    49
   2E |   16   16    7   11   16    4   14   15   10   19    4 |    32   32   31   26   34   27   31   33   33   26    30
   3  |    8   15    4   14   16    4   13   10    8   11    4 |    31   29   27   21   28   22   26   26   28   26    26
  X4E |   15   23    8   19  ---    9  ---   15    9  ---    6 |    42   60   48   59  ---   47  ---   53   51  ---    46
   5  |   12   18    7   13   14    6   17   11   11   15    4 |    38   44   32   27   40   34   44   30   40   38    35
   6  |    9   13    5   10   16    3   12   14   10   12    4 |    23   23   21   18   26   17   21   21   22   21    20
   7E |   10   24    5   11   20    4   21    9   11   10    5 |    32   32   25   24   31   22   27   26   29   22    26
   8E |   10   22   10   13   14    6   15   20   12   15    5 |    27   34   24   18   23   21   29   32   27   26    23
   9E |   16   20   15   11   18    9   17   26   20   22    6 |    42   38   35   30   37   34   36   41   45   36    34
  10  |    8   13    5   10   15    4   12    9    7   17    3 |    20   22   20   17   23   14   18   16   23   20    18
  11  |    9   11    7   10   24    5   13   10    9   10    4 |    57   54   48   50   60   50   52   52   53   51    51
  12  |   12   19    7   13   16    3   16   13    9   17    4 |    31   33   27   24   35   23   29   28   28   25    26
  13  |    6   14    6   13   12    4   14    9   13   17    4 |    29   35   28   29   40   26   35   24   33   25    29
  14  |   10   19    6   13   12    5   16   12    9   22    4 |    28   30   28   28   31   23   29   30   25   26    26
  15  |    8   17    5   14   11    3   18   12   13   18    4 |    26   27   23   27   32   22   27   28   30   23    25
  16  |   15   19    6   19   11    3   21   13    9   19    5 |    27   23   19   20   25   14   24   19   22   19    19
  17  |   11   15    4   15   15    4   18   13    8   19    4 |    38   36   35   37   45   33   35   38   35   31    35
  18  |   11   20    7   15   12    4   17   13    9   18    4 |    22   32   23   21   29   19   30   27   29   18    24
  19  |    8   18    5   16   15    5   18   12   11   16    4 |    30   28   25   28   34   23   28   24   26   26    25
  20  |    8   18    6   13   14    4   19   11   14   17    4 |    29   29   24   23   35   23   30   25   31   22    26
  21E |    9   14    9   12   14    5   13   17   13   10    4 |    29   27   25   28   32   23   25   25   34   24    25
  22  |   12   20    4   12   13    3   17   11    8   18    4 |    27   35   25   25   37   24   32   30   28   19    27
  23  |    7   17    5   14   11    3   16   10    9   23    4 |    28   32   27   26   34   23   33   26   29   25    27
  24E |    8   11    4   13   15    5   11   13   12   15    4 |    31   26   25   23   31   23   28   28   29   26    26
  25  |    9   13    5   12   13    3   14   10    7   14    3 |    27   30   24   21   34   22   33   23   29   24    25
  26  |    6   13    5   10   14    4    9   10    9   16    3 |    23   24   23   23   28   20   21   23   26   24    22
 X27  |    8   14    6   11  ---    6   14   10   11   11    4 |    29   29   27   16  ---   21   32   24   28   23    26
  28  |    8   18    7   17   18    9   18   10   10   20    4 |    33   31   29   33   40   26   32   30   33   26    30
  29  |   12   20    8   14   14    5   17   11   11   20    4 |    27   32   22   19   25   21   29   23   32   23    23
 X30  |    3  ---  ---  ---  ---  115  ---  ---  ---  ---    0 |    42  ---  ---  ---  ---   80  ---  ---  ---  ---    40
  31E |    9   20    5   12   13    5   22   12   12   12    4 |    28   27   23   23   30   23   27   28   33   21    25
  32  |    6   11    5   11   14    5   10    9   12   15    3 |    19   21   16   15   18   14   21   14   25   18    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   17    7   13   15    5   16   13   11   17      |T   31   32   27   26   33   26   30   28   31   26    28
 WRMS |   10   17    6   13   14    5   15   11    9   16      |NE  28   29   25   23   31   24   29   25   28   23    25
 MEDI |    9   17    6   13   14    4   16   12   10   16      |MD  29   31   25   24   32   23   29   27   29   24    26

Table 3.1756.4   GPS week: 1756   Day: 4   MJD: 56540.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   12   12    5   14   14    7   12   20   10    9    4 |    37   38   35   37   41   33   39   36   40   35    36
   2E |   13   15    6   12   11    3   14   11   10   19    4 |    24   26   25   20   28   22   26   28   26   22    23
   3  |    8   14    4   14   12    4   10   14    8   12    3 |    28   30   24   25   31   21   29   25   26   25    25
  X4E |   14  ---   11   13   16    6   19   23   13   28    6 |    58  ---   60   67   60   61   63   69   62   54    59
   5  |    9   17    7   11   13    5   17   12    7   17    4 |    34   37   26   20   35   27   36   27   29   28    28
   6  |    8   14    5    9   17    4   11   18    8   12    4 |    20   20   16   15   24   14   18   21   18   17    16
   7E |   11   23    5   11   16    3   23   10    9   11    4 |    25   26   18   15   24   15   23   19   25   15    19
   8E |   10   23    9   11   14    5   17   25   17   17    5 |    17   29   15   14   17   10   24   30   23   21    14
   9E |   17   19   12    9   17    6   17   31   29   25    7 |    37   44   36   36   34   34   41   43   45   40    34
  10  |    9   10    4    7   14    4   13   11   10   18    3 |    14   15   13   16   19   12   14   17   17   17    13
  11  |    6   12    5    7   18    4    9    9    8   10    3 |    36   36   31   30   45   29   36   34   35   31    33
  12  |   11   18    7   12   16    5   17   13    7   18    4 |    25   25   16   18   30   15   24   24   21   18    19
  13  |   14   15    5   13   16    6   16    8   11   18    4 |    22   30   19   22   34   18   28   18   20   16    20
  14  |    9   17    7   11   13    5   17   17   12   21    4 |    24   27   19   21   26   16   26   29   27   21    21
  15  |   10   16    5   12   12    5   19   12    9   19    4 |    20   25   18   22   29   16   25   23   24   17    20
  16  |   17   18    6   16   13    3   20   14   13   20    5 |    21   22   14   16   23   13   22   17   20   17    15
  17  |   10   16    5   15   15    7   17   11   11   18    4 |    35   33   30   34   38   28   30   32   32   25    31
  18  |   10   21    6   13   14    4   16   20   11   18    5 |    21   33   23   20   29   19   28   35   22   21    23
  19  |    9   19    7   14   14    4   18   17    9   18    4 |    28   27   22   26   31   20   27   24   22   26    23
  20  |    7   20    6   11   12    5   20   12    9   17    4 |    25   28   20   23   32   21   28   23   27   18    23
  21E |    9   17    5    6   11    3   14   13   10   10    3 |    23   24   20   22   26   20   25   21   21   22    20
  22  |    9   18    5   13   15    6   17   15    9   16    4 |    22   35   23   22   34   20   31   29   27   15    24
  23  |    7   17    5   15   15    3   16    9   10   23    4 |    20   27   17   18   27   16   27   19   21   16    18
  24E |   10   14    4   12   13    7   12   12   10   12    4 |    25   23   20   14   26   14   25   22   20   18    19
  25  |    6   14    6   13   15    4   13   10   10   14    4 |    20   29   18   14   26   15   29   21   22   20    19
  26  |    8   11    4   12   13    4   12    9   10   16    3 |    18   17   17   18   22   14   20   18   21   17    17
 X27  |   10   13    5   10  ---    4   12   15   10   12    4 |    23   27   20   15  ---   15   30   20   22   20    20
  28  |    8   15    6   16   15    5   16   15   14   19    4 |    20   24   18   23   31   16   26   20   21   13    19
  29  |   11   18    6   13   14    9   17   11   15   21    4 |    24   29   19   16   24   20   28   23   26   21    20
 X30  |    5  ---  ---  ---  ---   38  ---  ---  ---  ---    0 |    34  ---  ---  ---  ---   36  ---  ---  ---  ---    34
  31E |    9   18    6   15   15    4   23   14   11   15    5 |    24   30   18   26   32   21   26   24   27   21    22
  32  |    7   13    5    8   13    5   11   14    7   13    3 |    10   14    9   12   11    8   14   11   13   13     8
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   17    6   12   14    5   16   15   12   17      |T   25   27   21   22   29   20   28   25   25   21    22
 WRMS |   10   17    6   12   14    5   15   12    9   17      |NE  23   26   19   19   27   18   25   22   22   19    20
 MEDI |    9   16    5   12   14    5   16   13   10   17      |MD  24   27   19   20   29   18   27   23   23   20    20

Table 3.1756.5   GPS week: 1756   Day: 5   MJD: 56541.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8   12    5   16   12    5   12   18   13   10    4 |    27   27   24   27   25   24   30   30   28   30    25
   2E |   11   12    7   11   15    4   13   11   10   18    4 |    35   31   33   30   34   29   32   32   33   26    31
   3  |    6   12    4    9   12    4   12   11   14   12    3 |    26   29   21   20   27   20   27   21   27   23    23
   4E |   13   19   14   11   14    6   16   23   14   25    6 |    76   71   75   78   71   76   71   72   68   68    72
   5  |    9   13    8   10   14    4   13   13   14   17    4 |    27   29   22   23   31   23   30   23   28   25    24
   6  |    6   13    4    7   11    3   11   14   12   13    3 |    19   19   16   15   20   14   21   19   19   18    16
   7E |   11   22    5   10   12    4   20   12    9   10    4 |    25   27   19   19   24   15   21   20   24   15    18
   8E |    9   27   12    9   12    5   16   16   20   17    5 |    20   35   19   16   19   14   24   21   23   20    16
   9E |   15   17   13   10   16    6   17   27   24   26    6 |    53   54   48   48   51   49   53   56   54   59    49
  10  |   11    9    5    8   15    4    9   12   12   18    3 |    14   12   11   16   13    9   13   16   14   18    10
  11  |    9   11    4    8   18    5   11   11   11   10    3 |    31   28   23   22   38   21   26   25   27   23    25
  12  |   11   17    6   13   18    6   13    9   12   22    4 |    25   25   18   19   30   16   23   23   21   22    19
  13  |    8   13    5   11   12    3   14    7    9   19    3 |    21   30   20   21   31   20   30   19   22   18    21
  14  |    8   15    6   13   11    4   15   17   13   22    4 |    19   26   19   21   24   16   26   25   23   19    19
  15  |   10   16    8   10   16    3   15   10   15   19    4 |    21   25   19   18   29   15   25   21   25   16    19
  16  |   13   21    6   14   13    2   19   15   13   20    5 |    19   24   15   17   22   13   23   18   21   16    15
  17  |   11   14    5   16   13    4   16   11   17   18    4 |    29   30   25   30   34   24   31   28   30   27    27
  18  |   10   19    6   12   15    4   16   12   14   15    4 |    21   31   23   21   27   18   28   27   26   17    22
  19  |    9   18    7   11   15    4   18   13   13   17    4 |    25   27   21   23   27   20   27   22   25   23    21
  20  |    9   20    6   14   12    4   20   11   13   17    4 |    24   26   20   19   30   17   26   21   25   17    21
  21E |   10   17    6   11   13    4   14   13   11    6    4 |    20   20   20   21   23   17   21   19   17   20    17
  22  |    9   20    5   12   13    4   16   15   10   15    4 |    22   36   21   20   33   19   32   29   28   15    24
  23  |    7   16    6   14   12    4   16    9   10   24    4 |    24   27   21   24   26   19   29   21   21   19    21
  24E |   11   11    3    9   14    4   11   10    8   12    3 |    22   21   18   11   24   17   25   22   22   19    19
  25  |   10   11    4   14   16    4   14    8   12   15    4 |    25   28   20   20   29   17   31   20   20   23    21
  26  |   10   10    4    9   14    4    8   12   10   17    3 |    16   18   16   16   22   13   19   16   19   17    16
 X27  |    8   12    5    8  ---    4   13   11   15   12    4 |    22   25   19   15  ---   15   29   18   23   20    20
  28  |    9   14    4   12   15    6   16   15    9   19    4 |    20   27   20   21   30   18   26   22   25   18    20
  29  |   12   17    6   12   19    5   13   10   12   19    4 |    23   25   17   18   25   15   24   21   23   19    18
 X30  |    3  ---  ---  ---  ---   91  ---  ---  ---  ---    0 |    47  ---  ---  ---  ---   55  ---  ---  ---  ---    46
  31E |   10   20    7   16   13    4   20   13   18   14    5 |    20   25   17   20   28   16   24   22   31   16    19
  32  |    6   13    4   10   12    7   12   12   10   15    3 |     9   14    8   14   10    7   14   13   12   13     7
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   16    7   12   14    4   15   14   13   17      |T   25   28   22   22   28   21   27   24   25   22    23
 WRMS |   10   16    6   12   14    4   14   12   11   17      |NE  22   25   18   19   26   18   25   21   22   19    20
 MEDI |    9   15    6   11   13    4   14   12   12   17      |MD  22   27   20   20   27   17   26   21   24   19    20

Table 3.1756.6   GPS week: 1756   Day: 6   MJD: 56542.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   11   10    4   12   12    5   12   17    7    8    4 |    43   42   37   37   42   38   45   42   44   40    39
   2E |   19   16    6    9   19    4   15   14   11   19    5 |    34   28   30   25   28   25   27   35   31   22    28
   3  |   10   14    4    8   14    5   13    9    8   14    3 |    27   24   24   21   27   19   27   26   24   25    23
   4E |   33   64   23   11   22   11   21   41   21   45   11 |   127  157  127  135  124  134  129  149  141  108   135
   5  |   15   16    6    8   16    3   16   13   12   17    4 |    36   39   28   25   37   31   40   30   36   34    31
   6  |    9   16    3    7   13    3   12   13    6   14    3 |    20   18   19   17   26   16   19   20   23   20    18
   7E |   11   23    6    9   15    4   18   11   10   13    4 |    30   29   22   21   28   20   24   23   26   21    22
   8E |    7   23   13    9   14    7   14   16   19   17    5 |    16   30   17   15   17   12   21   23   24   18    14
   9E |   16   18   11   11   18    8   15   20   16   23    5 |    84   76   79   74   75   74   76   70   81   77    76
  10  |   13   10    4    8   14    5   10   12    9   18    3 |    14   13   13   15   23   12   13   19   21   19    12
  11  |    9   13    4    9   18    4   10   11    8   11    3 |    40   38   35   33   49   33   37   35   36   34    36
  12  |   12   17    9   11   17    4   14   10   12   20    4 |    26   26   20   19   31   16   23   23   23   20    20
  13  |    9   16    6    9   15    4   17    7    7   19    4 |    24   29   25   25   38   22   29   22   26   23    24
  14  |   11   17    6   12   13    4   16   21    9   22    4 |    25   27   25   29   31   23   26   37   30   26    25
  15  |   13   16    7   11   17    5   16   11   14   20    4 |    23   24   22   25   35   20   24   25   28   20    22
  16  |   13   22    6   12   13    4   19   13    9   24    4 |    21   22   14   18   23   11   20   16   19   17    14
  17  |   10   19    6   13   14    4   17   11    7   20    4 |    33   32   32   37   41   29   30   32   30   33    31
  18  |   12   19    6   13   16    4   17   11    9   17    4 |    20   29   23   23   30   20   28   27   30   16    23
  19  |   11   20    7   12   13    4   20   12    8   20    4 |    27   27   26   29   32   24   25   25   25   29    24
  20  |    8   19    6   11   15    3   21   11    6   18    4 |    25   24   22   25   35   21   26   25   28   19    23
  21E |   11   13    9    8   12    3   11   12    9   10    4 |    26   23   22   23   27   21   25   19   30   23    22
  22  |   11   19    6   12   14    3   18   15   10   16    4 |    28   32   29   31   40   24   31   37   32   16    29
  23  |    9   18    7   11   13    3   18    8    8   25    4 |    20   25   22   20   27   17   25   21   23   19    19
  24E |   16   12    4   10   10    3   11   10   11   14    4 |    28   22   20   15   26   16   24   23   22   21    20
  25  |   14   17    8   10   13    3   15   10    8   15    4 |    21   30   17   14   26   14   30   20   20   24    18
  26  |   10   14    5    8   15    4    9   10    9   16    3 |    23   20   21   21   30   18   18   22   24   19    21
 X27  |   11   15    5    9  ---    3   15   14    8   13    4 |    23   26   22   18  ---   18   30   23   23   22    22
  28  |   11   19    5   11   16    6   17   14    7   21    4 |    22   26   21   25   32   17   23   26   21   21    21
  29  |   12   15    8   11   13    5   15   14    9   21    4 |    26   31   21   17   27   20   30   23   32   23    23
 X30  |    3  ---  ---  ---  ---   27  ---  ---  ---  ---    0 |    36  ---  ---  ---  ---   48  ---  ---  ---  ---    36
  31E |   11   19    6   13   14    5   22   12    8   15    4 |    28   26   20   23   31   22   27   30   30   24    23
  32  |    9   13    4   10   15    4   11   12    8   17    3 |    13   14   11   14   15    8   14   16   17   17    10
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   13   20    8   10   15    5   16   15   10   19      |T   30   32   27   28   35   26   31   31   32   27    28
 WRMS |   11   17    6   10   14    4   16   11    8   19      |NE  24   25   21   22   30   20   25   24   25   22    22
 MEDI |   11   17    6   11   14    4   15   12    9   17      |MD  26   27   22   23   30   20   26   25   26   22    23



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 4.1756   GPS week: 1756   MJD: 56536.0-56542.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3006 |U    8     8    18 |U    7     9    33 |U ----  ----  ---- |
emr | emr 2948 |    10     9    23 |U   13    19    61 |  ----  ----  ---- |
esa | esa 2962 |     8     7    19 |U    7    10    38 |  ----  ----  ---- |
gfz | gfz 2951 |U   10     9    22 |U   10    12    42 |U ----  ----  ---- |
grg | grg 2852 |U   41    50   120 |U   39    42   112 |  ----  ----  ---- |
igr | igr 2969 |     8     8    19 |     7    10    35 |  ----  ----  ---- |
igs | igs 2949 |     8     8    20 |     9    13    43 |  ----  ----  ---- |
jpl | jpl 2937 |    10     9    23 |U   15    18    66 |U ----  ----  ---- |
mit | mit 2962 |    10     8    19 |U   13    18    53 |U ----  ----  ---- |



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 5.1756.0   GPS week: 1756   Day: 0   MJD: 56536.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3023 |     7     5    14 |     5    11    30 |  ----  ----  ---- |
emr | emr 2964 |    11     8    19 |    11    15    36 |  ----  ----  ---- |
esa | esa 2976 |     7     5    16 |     5    10    29 |  ----  ----  ---- |
gfz | gfz 2964 |    12    10    18 |    11    16    37 |  ----  ----  ---- |
grg | grg 2880 |    43    36   123 |    32    44   106 |  ----  ----  ---- |
igr | igr 2975 |     7     6    17 |     6    11    30 |  ----  ----  ---- |
igs | igs 2975 |     8     5    18 |     9    16    25 |  ----  ----  ---- |
jpl | jpl 2964 |     8     6    17 |    23    23    80 |  ----  ----  ---- |
mit | mit 2976 |     8     5    16 |    11    18    33 |  ----  ----  ---- |

Table 5.1756.1   GPS week: 1756   Day: 1   MJD: 56537.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3012 |     6     4    16 |     6     8    32 |  ----  ----  ---- |
emr | emr 2964 |     8     5    18 |    18    26   102 |  ----  ----  ---- |
esa | esa 2976 |     6     4    15 |     7     9    36 |  ----  ----  ---- |
gfz | gfz 2964 |     7     6    20 |    12    13    42 |  ----  ----  ---- |
grg | grg 2880 |    42    80   108 |    41    33   120 |  ----  ----  ---- |
igr | igr 2974 |     8     5    19 |     7     8    32 |  ----  ----  ---- |
igs | igs 2969 |     6     4    14 |    13    21    80 |  ----  ----  ---- |
jpl | jpl 2963 |     7     6    18 |    18    22    88 |  ----  ----  ---- |
mit | mit 2976 |     6     5    14 |    19    23    86 |  ----  ----  ---- |

Table 5.1756.2   GPS week: 1756   Day: 2   MJD: 56538.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2918 |     6     5    16 |     6    11    28 |  ----  ----  ---- |
emr | emr 2949 |     8     5    25 |    16    21    67 |  ----  ----  ---- |
esa | esa 2880 |     7     5    17 |     7    12    30 |  ----  ----  ---- |
gfz | gfz 2873 |    12     7    20 |     8    13    35 |  ----  ----  ---- |
grg | grg 2784 |    24    29   111 |    31    29    86 |  ----  ----  ---- |
igr | igr 2945 |     8     6    16 |     7    11    30 |  ----  ----  ---- |
igs | igs 2872 |     7     6    18 |     7    13    34 |  ----  ----  ---- |
jpl | jpl 2872 |    11     7    24 |     8    14    49 |  ----  ----  ---- |
mit | mit 2880 |    16     7    19 |    10    15    48 |  ----  ----  ---- |

Table 5.1756.3   GPS week: 1756   Day: 3   MJD: 56539.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3019 |     8     7    16 |    10     9    43 |  ----  ----  ---- |
emr | emr 2964 |    10    10    25 |    10    15    63 |  ----  ----  ---- |
esa | esa 2976 |     9     7    18 |    10    12    50 |  ----  ----  ---- |
gfz | gfz 2964 |    11     7    29 |    10     7    46 |  ----  ----  ---- |
grg | grg 2784 |    31    49    89 |    30    35   109 |  ----  ----  ---- |
igr | igr 2972 |     8     8    17 |     9    10    48 |  ----  ----  ---- |
igs | igs 2975 |     8     7    17 |     9    11    50 |  ----  ----  ---- |
jpl | jpl 2872 |    12    11    29 |     9    12    56 |  ----  ----  ---- |
mit | mit 2976 |     8     7    18 |    13    21    55 |  ----  ----  ---- |

Table 5.1756.4   GPS week: 1756   Day: 4   MJD: 56540.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3037 |     6     6    13 |     6    10    40 |  ----  ----  ---- |
emr | emr 2872 |     9     9    15 |     8    11    41 |  ----  ----  ---- |
esa | esa 2976 |     5     4    15 |     7    11    49 |  ----  ----  ---- |
gfz | gfz 2964 |     5     4    14 |     7    12    43 |  ----  ----  ---- |
grg | grg 2880 |    37    30   101 |    31    43   107 |  ----  ----  ---- |
igr | igr 2972 |     5     5    14 |     7    11    45 |  ----  ----  ---- |
igs | igs 2974 |     6     7    19 |     8    12    48 |  ----  ----  ---- |
jpl | jpl 2964 |     7     7    16 |    18    18    73 |  ----  ----  ---- |
mit | mit 2976 |     6     6    14 |    20    24    58 |  ----  ----  ---- |

Table 5.1756.5   GPS week: 1756   Day: 5   MJD: 56541.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3015 |    11     9    26 |     6     7    26 |  ----  ----  ---- |
emr | emr 2964 |    11    10    28 |    15    20    59 |  ----  ----  ---- |
esa | esa 2976 |    11     8    26 |     7     8    33 |  ----  ----  ---- |
gfz | gfz 2964 |    11     9    25 |     7    11    43 |  ----  ----  ---- |
grg | grg 2880 |    60    79   183 |    69    71   164 |  ----  ----  ---- |
igr | igr 2974 |    11     8    25 |     8     8    29 |  ----  ----  ---- |
igs | igs 2964 |    10     8    25 |     7     8    29 |  ----  ----  ---- |
jpl | jpl 2963 |    10     9    26 |    16    22    65 |  ----  ----  ---- |
mit | mit 2976 |    17     9    28 |     8    13    49 |  ----  ----  ---- |

Table 5.1756.6   GPS week: 1756   Day: 6   MJD: 56542.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3021 |    12    17    29 |     7    10    32 |  ----  ----  ---- |
emr | emr 2963 |    14    17    28 |    16    24    57 |  ----  ----  ---- |
esa | esa 2976 |    12    18    27 |     8    11    38 |  ----  ----  ---- |
gfz | gfz 2965 |    12    18    29 |    12    13    50 |  ----  ----  ---- |
grg | grg 2880 |    47    48   123 |    39    41    93 |  ----  ----  ---- |
igr | igr 2975 |    12    18    28 |     8    10    35 |  ----  ----  ---- |
igs | igs 2918 |    12    17    28 |     8    10    36 |  ----  ----  ---- |
jpl | jpl 2962 |    13    18    30 |    11    15    53 |  ----  ----  ---- |
mit | mit 2976 |    12    17    26 |     9    14    44 |  ----  ----  ---- |


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 6.1756   GPS week: 1756   MJD: 56536.500-56542.500

                                                         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 |      -1     -12     -16      15      1 |      24     27
            |      33       8      33      51      7 |       3
emr   uuuuu |      56     -16     299     130     13 |      55     57
            |      19      23      99      54     14 |       8
esa   uuuuu |       9     -12     -20      82      3 |      14     18
            |       8      10      43      53      2 |       4
gfz   uuuuu |     -15       2     -45     -48     -3 |       0     13
            |      28      29      47      74      2 |       1
grg   uuuux |      -3      -7       3    -128      8 |     -16     26
            |      24      19      89      85     17 |       8
igr   xxxxx |     -15      10      -5     -14      4 |      -3     12
            |      25      17      33      43      4 |       4
irf   xxxxx |       1      -2     -43    -107      1 |      -4     13
            |       9      12      39      27      2 |       2
jpl   uuuuu |     -18      18      60      39      7 |      46     49
            |      19      21      75      64     13 |       7
mit   uuuxu |     -26       5     -57    -341     -3 |      15     20
            |      15      20      55      65      6 |       1
ngs   uuuuu |       3      38     -69    -154      1 |       9     16
            |      67      40      26      69      2 |       2
sio   xxxxx |      27      37    -204     -93     -2 |      47     48
            |     118      52      65      51      4 |       2


Table 7.1756.0   GPS week: 1756   Day: 0   MJD: 56536.500

                                                         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 |      46      -1      51     -36      6 |      21     23
emr   uuuuu |      86     -50     387     100     15 |      45     46
esa   uuuuu |       0     -20     -41      80      7 |      10     13
gfz   uuuuu |      -9      28     -72      37     -3 |       1     11
grg   uuuux |       3     -23     -77    -140     34 |     -30     40
igr   xxxxx |      18      25      12     -38     11 |      -7     11
irf   xxxxx |       4      14     -77     -81     -3 |      -5      9
jpl   uuuuu |       4       1      98      35     16 |      38     40
mit   uuuxu |     -18      29    -110    -277    -12 |      18     20
ngs   uuuuu |     -83      44     -42    -168     -2 |       9     14
sio   xxxxx |     239      78    -264    -111     -3 |      46     47

Table 7.1756.1   GPS week: 1756   Day: 1   MJD: 56537.500

                                                         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 |      32      -7     -31     122     14 |      20     22
emr   uuuuu |      46     -40     437     217     11 |      47     48
esa   uuuuu |      17     -23      39     191      3 |       9     13
gfz   uuuuu |       1      26     -71    -177     -6 |      -1     12
grg   uuuux |     -38      13    -133    -246      4 |     -24     34
igr   xxxxx |     -21     -12      28     -39      1 |      -7     11
irf   xxxxx |       1       9    -114     -88      2 |      -7     12
jpl   uuuuu |      -8       9     121      15     -3 |      39     41
mit   uuuxu |     -34      25    -126    -290     -5 |      14     19
ngs   uuuuu |     -26      15     -96    -277      0 |       6     13
sio   xxxxx |    -110      44    -305    -124      0 |      44     45

Table 7.1756.2   GPS week: 1756   Day: 2   MJD: 56538.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -14     -20      -6      -6      0 |      22     25
emr   uuuuu |      39      11     186      63     32 |      48     50
esa   uuuuu |      18     -16       6      47      5 |      10     14
gfz   uuuuu |     -63       9    -101      31     -3 |      -2     12
grg   uuuux |      25     -26      45      14     -8 |     -19     27
igr   xxxxx |     -52      13     -38     -21      0 |      -6     11
irf   xxxxx |       1      -5     -17     -93      1 |      -7     12
jpl   uuuuu |     -45      55     -75     -66     29 |      41     42
mit   uuuxu |     -38       3      36    -398     -8 |      14     18
ngs   uuuuu |      52      21     -56    -109     -1 |       6     13
sio   xxxxx |     -45      36    -135     -66     -3 |      45     46

Table 7.1756.3   GPS week: 1756   Day: 3   MJD: 56539.500

                                                         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     -21     -13      -7     -2 |      26     29
emr   uuuuu |      51      -5     300      77     15 |      56     60
esa   uuuuu |       8      -9     -41     102      4 |      15     20
gfz   uuuuu |     -36      33     -76     -20     -2 |       1     14
grg   uuuux |       3     -20      45    -162     23 |     -12     18
igr   xxxxx |     -38      31      22      50      4 |      -2     12
irf   xxxxx |      -2     -14     -19     -83      1 |      -4     14
jpl   uuuuu |     -18      29      27      90      3 |      49     52
mit   uuuxu |      -6     -27     -26    -261     -3 |      15     21
ngs   uuuuu |      32      41     -40    -181      2 |       9     17
sio   xxxxx |     -12      -9    -155       3     -1 |      48     49

Table 7.1756.4   GPS week: 1756   Day: 4   MJD: 56540.500

                                                         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 |     -40     -15     -53     -10     -3 |      25     28
emr   uuuuu |      56     -23     360     162     17 |      58     62
esa   uuuuu |       0     -15     -36      39      0 |      16     22
gfz   uuuuu |      -5     -33     -19     -91     -1 |       0     13
grg   uuuux |       4     -18     -46     -48     15 |     -10     20
igr   xxxxx |     -12     -11       9     -73      6 |      -2     12
irf   xxxxx |     -11     -16     -45    -134      0 |      -4     14
jpl   uuuuu |       2      10     102      10      8 |      49     53
mit   uuuxu |     -44     -12     -38    -425     -4 |      14     19
ngs   uuuuu |      47     108     -71     -64      3 |       9     16
sio   xxxxx |      93     -55    -236    -158     -7 |      48     50

Table 7.1756.5   GPS week: 1756   Day: 5   MJD: 56541.500

                                                         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 |     -13     -17     -29      19     -2 |      26     29
emr   uuuuu |      37     -10     229     133     15 |      62     66
esa   uuuuu |       5      -7     -87      67      1 |      17     23
gfz   uuuuu |     -14     -16      -3     -57     -5 |       0     13
grg   uuuux |     -34       5     110    -146    -10 |      -9     20
igr   xxxxx |      -3       2     -60     -13      3 |       1     12
irf   xxxxx |      -5      -8     -21    -127      5 |      -3     14
jpl   uuuuu |     -28      -7     135      51      9 |      52     55
mit   uuuxu |     -34       8     -56    -369      6 |      14     19
ngs   uuuuu |      82      60     -71    -169      1 |      10     17
sio   xxxxx |     -55      77    -145     -95      5 |      48     49

Table 7.1756.6   GPS week: 1756   Day: 6   MJD: 56542.500

                                                         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 |      20      -3     -32      25     -5 |      27     30
emr   uuuuu |      79       5     195     161    -16 |      67     70
esa   uuuuu |      19       7      19      50      3 |      19     24
gfz   uuuuu |      25     -34      27     -58     -2 |       0     13
grg   uuuux |      20      20      77    -166     -1 |     -10     21
igr   xxxxx |       7      21      -5      35      3 |       2     13
irf   xxxxx |      18       8     -11    -144      2 |      -2     15
jpl   uuuuu |     -34      33      14     137    -13 |      55     58
mit   uuuxu |      -8      13     -82    -369      2 |      15     20
ngs   uuuuu |     -84     -19    -108    -107      5 |      11     18
sio   xxxxx |      77      87    -190     -99     -2 |      49     50



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