[IGSREPORT-27955] Wk 2157 IGS Final Orbits

acc acc at igs.org
Fri May 28 00:52:49 UTC 2021


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2157   (May 09, 2021 - May 15, 2021)

Contacts: acc at igs.org


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

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

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

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

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

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

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


SOFTWARE:
---------

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

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

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

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

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


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

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

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

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



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

igs2157[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs2157[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs2157[0-6].cls  IGS GPS clock combination summary report.
igs21577.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs21577.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   | DGAR IRKJ TIXI TIXI
                0  |  EMR   | IRKJ SUTM
                0  |  ESA   | PTBB PTBB
                0  |  GFZ   | DGAR HERS MAYG DGAR HERS MAYG
                0  |  GRG   | 6 21 21 CCJ2 CHTI CPVG DGAR GLSV HYDE IRKJ NICO PARC
                0  |  GRG   | SFER SSIA STK2 TLSE TRO1 CCJ2 GLSV IRKJ SFER TLSE
                0  |  JPL   | DGAR
                1  |  COD   | ANKR TIXI
                1  |  EMR   | 21 21 AREQ AREQ SUTM
                1  |  ESA   | AREQ PTBB SFER AREQ PTBB SFER
                1  |  GFZ   | AREQ GODE HERS MAYG SFER AREQ GODE HERS LHAZ MAYG
                1  |  GFZ   | SFER
                1  |  GRG   | GLSV HYDE INVK LHAZ REUN SFER INVK JOG2 LHAZ REUN
                1  |  GRG   | SFER
                1  |  JPL   | SHAO BAKE NYAL SHAO
                2  |  COD   | LHAZ TIXI LHAZ TIXI
                2  |  EMR   | NLIB SUTM
                2  |  ESA   | DGAR PTBB DGAR PTBB
                2  |  GFZ   | DGAR HERS MAYG DGAR HERS MAYG
                2  |  GRG   | 21 ASCG CCJ2 CHTI CKIS CZTG DAEJ GLSV GMSD KRGG LHAZ
                2  |  GRG   | OHI3 TLSE CCJ2 CZTG LHAZ OHI3 TLSE
                2  |  JPL   | BADG
                3  |  COD   | TIXI LHAZ
                3  |  EMR   | WHIT YELL FAIR HARB KIRU MDVJ PERT SUTM WHIT YELL
                3  |  ESA   | MAC1 PTBB SFER YEL2 MAC1 PTBB SFER YEL2
                3  |  GFZ   | ANKR BRAZ GUAT HERS KERG MAYG SALU SFER THTI TSKB
                3  |  GFZ   | ANKR HERS MAYG SFER THTI
                3  |  GRG   | CHTI CPVG FAIR JOG2 OHI3 PARC WARK FAIR PARC SVTL
                3  |  JPL   | KERG FLIN KERG MCM4 SFER TRO1
                4  |  COD   | TIXI HYDE TIXI
                4  |  EMR   | LPGS MDVJ SUTM
                4  |  ESA   | MAS1 PTBB MAS1 PTBB
                4  |  GFZ   | HERS MAYG HERS MAS1 MAYG
                4  |  GRG   | 21 21 BRST CCJ2 CHTI CKIS CPVG CZTG DAEJ HYDE INVK
                4  |  GRG   | KARR KRGG OHI3 REYK SVTL TEHN TLSE TRO1 WARK CPVG
                4  |  GRG   | MAS1 SVTL
                4  |  JPL   | CZTG
                5  |  COD   | TIXI TIXI
                5  |  EMR   | MDVJ MDVJ NIST SUTM SUWN WARK
                5  |  ESA   | PTBB PTBB
                5  |  GRG   | 21 21 CCJ2 CHTI CZTG GLSV JFNG KARR NICO OHI3 PARC
                5  |  GRG   | GLSV JFNG
                5  |  JPL   | THU2
                6  |  COD   | TIXI TIXI
                6  |  EMR   | TLSE LPGS MDVJ OPMT SUTM TLSE
                6  |  ESA   | CHUR PTBB SCOR YEL2 PTBB SCOR YEL2
                6  |  GFZ   | URUM URUM
                6  |  GRG   | 19 21 21 BRST CCJ2 CHTI CZTG DAEJ GLSV GMSD HOFN
                6  |  GRG   | HYDE JFNG KARR OHI3 PARC SFER SSIA SUTM SVTL TLSE
                6  |  GRG   | TRO1 XMIS SUTM SVTL TLSE
                6  |  JPL   | MCM4 THU2

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

 6. Velocity changes were estimated to alleviate the effects of modeling problems,
    experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G26 |    |    |    |    |    |  4 |  4 |

 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.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) all IGS products,
    are based on the IGS realization of the ITRF2014 reference frame (IGS14).
    For more information see IGSMAIL #7399.
    
    Starting 17-May-2020 (GPS Week 2106, day 0, MJD 58986) all IGS products,
    are based on the updated reference frame (IGb14).
    For more information see IGSMAIL #7921.

 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 |     .3     .1     .6       9      5     -1    -.25
       EMR  |   0 |    8.6   -1.7    1.9       5     20      1     .12
       ESA  |   0 |   -1.0   -1.1   -1.0     -12     20     22    -.12
       GFZ  |   0 |    -.1    -.2     .3      12      5     12    -.11
       GRG  |   0 |    4.2   -2.5  -19.2      17    -31      3    -.06
       JPL  |   0 |   10.3   -2.7    6.4      -2      3    -10    -.07
       MIT  |   0 |    5.5   -1.9    5.3       0     14      8     .09
       NGS  |   0 |    9.0   -6.1    8.7      16    -30    -47     .02
       SIO  |   0 |    1.1   -2.2   16.1     -61    -39    -13    -.05

       COD  |   1 |     .3     .1     .4       8      1      6    -.26
       EMR  |   1 |    4.2     .3    1.7       7      1      4     .02
       ESA  |   1 |    -.6   -1.0   -1.4     -20     39     19    -.13
       GFZ  |   1 |    -.2    -.0     .1      12      4     17     .01
       GRG  |   1 |     .2     .2  -21.8      10    -35     -4     .06
       JPL  |   1 |   11.4   -5.4    9.6       5     -9     -4    -.03
       MIT  |   1 |    3.0   -1.4    2.5       0     14     10     .18
       NGS  |   1 |    4.8   -7.4    6.1     -25    -30    -42     .10
       SIO  |   1 |   -1.4    -.1   12.6     -25      3      4    -.06

       COD  |   2 |     .2     .2     .2      11      2      2    -.18
       EMR  |   2 |    4.2    4.0   -4.5     -12      3    -14     .11
       ESA  |   2 |    -.6   -1.1   -1.2     -19     29     12    -.22
       GFZ  |   2 |     .3    -.0    -.0      12     -6     12    -.04
       GRG  |   2 |    1.2    1.2  -21.6      25    -32      3    -.06
       JPL  |   2 |    5.8   -4.0    8.4      -6      1    -17    -.13
       MIT  |   2 |    3.8    -.8   -3.4      -5     16     10     .17
       NGS  |   2 |    7.1   -4.4    9.7       5    -36    -30     .05
       SIO  |   2 |    2.7   -3.9    7.4    -107    -76     11     .01

       COD  |   3 |    -.1     .0     .2       8      5      2    -.12
       EMR  |   3 |    1.7   -4.4   -1.6      -6      1      0     .24
       ESA  |   3 |    -.3   -1.2    -.9     -25     27     19    -.09
       GFZ  |   3 |    -.2    -.1     .3      15      4     19    -.10
       GRG  |   3 |     .2   -1.4   -5.6      29    -33     17    -.06
       JPL  |   3 |   -1.1   -6.5    3.1      -3     -4    -12    -.09
       MIT  |   3 |    2.4   -1.4    1.9      -8     25      5     .23
       NGS  |   3 |    4.4   -2.6    8.5      -6    -44    -17     .10
       SIO  |   3 |   -2.4     .7    9.8      -6     32     73     .03

       COD  |   4 |    -.0     .0     .1       7      6      9    -.13
       EMR  |   4 |     .8    -.1   -2.5     -19      0    -14     .21
       ESA  |   4 |    -.2    -.8   -1.3     -38     32     20    -.16
       GFZ  |   4 |    -.3    -.1     .4      14      2     21    -.14
       GRG  |   4 |    3.1   -2.3   -9.5      15    -33     13    -.02
       JPL  |   4 |    3.4   -6.8    5.0       6      0    -17     .02
       MIT  |   4 |    1.1     .8   -3.5     -25     39      6     .17
       NGS  |   4 |    3.6   -4.9   15.7      19    -20    -10     .09
       SIO  |   4 |     .2    -.9    7.1     -34    -27     70    -.01

       COD  |   5 |     .2     .1     .2       9      3      4    -.21
       EMR  |   5 |   -1.6   -8.1   -6.6     -20     -2    -17     .25
       ESA  |   5 |    -.5   -1.0   -1.2     -31     13     25    -.13
       GFZ  |   5 |    -.2    -.5    -.0      10      3     22     .02
       GRG  |   5 |    2.5    -.2   -9.7       9    -33     17     .12
       JPL  |   5 |    7.7    -.3   -4.1       7     -3    -13    -.26
       MIT  |   5 |    2.7    1.5   -2.9       1     11      5     .16
       NGS  |   5 |    4.7   -1.6    5.2     -25     -9     18     .15
       SIO  |   5 |   -2.0    1.4    7.2      11     24    102     .11

       COD  |   6 |     .2     .2     .4      11      3      2    -.24
       EMR  |   6 |    -.2    9.5   -5.8     -15      4     -4     .20
       ESA  |   6 |    -.6   -1.6    -.9     -20     10     22    -.23
       GFZ  |   6 |     .2     .0     .4      15      6     16    -.30
       GRG  |   6 |    3.9     .1  -16.7       5    -46     15     .08
       JPL  |   6 |    9.6    -.9    1.5       1     -7    -10    -.13
       MIT  |   6 |    4.3    5.1   -7.4     -13      1      8     .15
       NGS  |   6 |    3.7    3.4    4.2     -17      0     18     .08
       SIO  |   6 |    -.6    7.4    1.1     124      0    160    -.07


 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:
        https://files.igs.org/pub/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:
        https://files.igs.org/pub/station/general/igs08.atx
    
    The JPL solution did not use IGS08/igs08.atx until GPS Week 1649, which caused
    their RMS clock residuals to be higher during that period than for the other
    centres; from GPS Week 1632 through 1648 the JPL solution is excluded from the
    weekly SINEX combination.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) the absolute antenna
    model file has been updated to igs14.atx to be consistent with IGS14.
    See IGSMAIL #7399 for more information
        https://files.igs.org/pub/station/general/igs14.atx


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

Most combination statistics are with respect to the combined orbits and
consist of seven parts. The first, Table 1, summarizes all statistics for
the week. It contains means and standard deviations over the week of
satellite ephemeris and clock correction transformation parameters for
each centre (Table 1.2157.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2157.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 2.2157.[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 3.2157.[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 5.2157.0-6). 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 2157 summary.                       (May 09, 2021 - May 15, 2021)

Table 1.2157.a   GPS week: 2157   MJD: 59343.000-59349.000

         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  736|    0     0    -2     0     6     1   .00    7    7 |    -664     159      6     88
        |    0     0     1    12    11     7   .02           |      94     113
emr   79|   -2     1     1     6     3    16   .08   12   12 |  177846    -209     14    132
        |    3     2     2    13    20    17   .04           |    1007     842
esa  150|    0     0    -1     5    -4     0  -.08    7    7 |   -1037     742      6     89
        |    0     0     0    11    13    14   .01           |     218     522
gfz  242|    0     0     0     4   -11   -12   .07   11   10 |     -24      74     11     87
        |    0     0     3     8    22    10   .04           |     229     467
grg  121|    1     0   -10     4     0     4  -.07   10    9 |     -83     160      9    176
        |    0     0     5    13    15    11   .02           |     150     345
igr  n/a|    0     0     0     0    -6   -13  -.00    4    4 |    2408     -30     10     97
        |    0     0     0    15    18    11   .01           |     514     606
jpl   80|    0     0     4    -2   -18    -7   .16    9    9 |    1840     -21      8     82
        |    0     0     0    15    20    15   .01           |     796     725
mit  352|    0     0     0    -1     2   -18  -.02    7    7 |    1896      55     26   1506
        |    0     0     1    23    25    10   .01           |     784     590
ngs  210|    1     0     7   -13    25   -17  -.05    9    9 |    -692     219    883   1619
        |    0     0     2    18    22    13   .01           |      73     121
sio  418|    0     0     0     4   -15    35  -.03    8    8 |     ---     ---    ---    ---
        |    0     0     1    46    52    59   .01           |     ---     ---


Table 1.2157.b   GPS week : 2157   MJD: 59343.000-59349.000   

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

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.2157.0   GPS week: 2157   Day: 0   MJD: 59343.000                            

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  732|    0     0    -3    16     2     0   .02    7    7 |    -843     349      6     78
emr   80|    0     2     2    -2    39    37   .06   11   11 |  178407     906     12    129
esa  150|    0     0    -2    -2    11    27  -.07    7    7 |   -1018     848      7     89
gfz  243|    0     0    -1     7    29    -6   .06    9    9 |    -157      66     10     76
grg  121|    1     0   -16     7    26    18  -.04   11   10 |    -126     276     10    174
igr  n/a|    0     0     0   -18    29     0  -.00    4    4 |    2725     447     10     91
jpl   80|    1     0     5    -1    21    15   .15    9    9 |    2338     548      7     84
mit  352|    0     0     2    40   -33   -19  -.04    7    7 |    2115     649     31   1739
ngs  214|    0     0     5   -30    53   -17  -.06    8    8 |    -762     226    760   1395
sio  421|    0    -1     1   -37  -109   -32  -.04    8    8 |     ---     ---    ---    ---

Table 2.2157.1   GPS week: 2157   Day: 1   MJD: 59344.000                            

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  731|    0     0    -2     5     0    12  -.01    7    6 |    -562      17      6     83
emr   79|   -1     1     2    10    12    34   .06   11   11 |  179251    -549     12    120
esa  150|    0     0    -1    20     9     1  -.10    7    7 |    -588    -307      7     83
gfz  244|    0     0    -2    -2     5    -9   .05   10   10 |     259    -221     11     66
grg  122|    2     0   -16     3     4    14  -.04   11   10 |      38      39     11    199
igr  n/a|   -1     0    -1    12    -9    -4  -.01    4    4 |    3140    -374     10     93
jpl   80|    1     0     4    -9   -11     2   .17    9    9 |    2599     400      9     96
mit  352|    0     0     0   -17    -7    -1  -.02    7    8 |    3245    -128     24   1574
ngs  215|    1     0    10   -25    12     5  -.06    9    9 |    -626      65   1051   1612
sio  420|   -1     0     4     6   -22   -42  -.04    8    8 |     ---     ---    ---    ---

Table 2.2157.2   GPS week: 2157   Day: 2   MJD: 59345.000                            

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  732|    0     0    -3     0    23    -9   .01    8    7 |    -578      68      7     80
emr   79|   -2     2     2    11    -8    15   .10   11   11 |  178706    -520     14    127
esa  150|   -1     0     0    18   -15     1  -.09    7    7 |   -1017     903      7     85
gfz  242|    0     0     6     9   -32   -18   .02   12   11 |    -316     746     12     77
grg  122|    0     0   -17    12    -5     3  -.09   11   10 |    -182     379     11    170
igr  n/a|    0     0     0    25    -8    -4  -.00    4    4 |    2756    -331     10     97
jpl   80|    0     0     5     4   -27   -16   .15    8    8 |    2798    -580      7     76
mit  352|    0     0     0    -1    25   -11  -.01   10    8 |    2484    -306     33   1346
ngs  208|    2     0     8     5    17    -4  -.05   10    9 |    -597      99   1028   1855
sio  416|    0    -1     1   -41   -15    20  -.01   11    8 |     ---     ---    ---    ---

Table 2.2157.3   GPS week: 2157   Day: 3   MJD: 59346.000                            

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  733|    0     0    -3   -20    18     6   .03    7    7 |    -692     223      7    101
emr   79|   -1     1     1    20   -11    -4   .06   11   11 |  178024   -1568     15    167
esa  150|    0     0    -1    -3   -15    -4  -.09    7    7 |   -1031     904      6     94
gfz  244|    0     0    -2     2   -24   -14   .05   10   10 |     168    -166     11    148
grg  122|    1     0    -4    16   -17     0  -.10   11    9 |      80    -190      9    175
igr  n/a|    0     0    -1    -3   -28   -31  -.01    4    4 |    2356   -1025     11    102
jpl   80|    0     0     3   -14   -45   -17   .17    9    9 |    2078   -1182      8     78
mit  352|    0     0    -1   -18    19   -13  -.02    7    6 |    1635    -950     27   1477
ngs  203|    1     0     4    15   -15   -32  -.04    8    8 |    -683     210    864   1649
sio  419|    0     0     1    28    51    69  -.03    8    7 |     ---     ---    ---    ---

Table 2.2157.4   GPS week: 2157   Day: 4   MJD: 59347.000                            

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  736|    0     0    -3    13     6     6  -.01    8    8 |    -657     222      7     99
emr   79|   -2     3     2   -12    15    16   .08   12   12 |  176785    -404     16    151
esa  150|    0     0     0   -10     6     7  -.06    7    7 |   -1221    1319      6     81
gfz  241|    0     0    -1     5    -8     0   .12   11   10 |     135    -371     11     85
grg  121|    2     0    -5     6     9    16  -.07   10    9 |      -3    -189      8    175
igr  n/a|    0     0    -1   -12     0   -17   .00    4    4 |    1574     121     10    100
jpl   80|    0     0     4   -25   -24   -29   .15    9    9 |    1047    -414      9     74
mit  352|    0     0    -2    16   -11   -17  -.03    6    6 |     902     161     25   1546
ngs  209|    1     0    11   -32    38   -31  -.07    9    9 |    -652     213    797   1595
sio  413|    0     0     0    30   -44    35  -.04    8    8 |     ---     ---    ---    ---

Table 2.2157.5   GPS week: 2157   Day: 5   MJD: 59348.000                            

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  743|    0     0    -1    -1     1     0  -.01    7    7 |    -701      91      7     91
emr   80|   -9    -4    -4    21    -6    25   .16   16   16 |  176974     -70     17    120
esa  150|    0     0     0    13   -20   -16  -.07    7    7 |   -1157    1029      7     96
gfz  242|    0     0     2    17   -17    -7   .09   11   10 |      26    -249     13     80
grg  122|    2     0    -6    12    -8    -3  -.07    9    8 |     -37      35      8    167
igr  n/a|    0     0     0     1   -15   -10   .00    4    4 |    2159     128     11     92
jpl   80|    0     0     4    16   -14    -6   .16    9    9 |     971     210      8     81
mit  352|    0     0    -1    -4   -10   -31  -.02    7    7 |    1354     178     22   1627
ngs  211|    0     0     6    -5    35   -16  -.03    9    9 |    -733     290    883   1596
sio  421|    0     1     0   -38    32    74  -.01    7    6 |     ---     ---    ---    ---

Table 2.2157.6   GPS week: 2157   Day: 6   MJD: 59349.000                            

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  750|    0    -1     0    -7   -11    -6  -.01    6    6 |    -619     147      6     86
emr   80|   -1     2     3    -5   -19    -9   .08   12   12 |  176779     740     17    111
esa  150|    0     0    -1     3   -10   -14  -.08    7    7 |   -1228     503      7     95
gfz  243|    1     0     0    -8   -33   -33   .14   12   13 |    -288     716     12     78
grg  122|    1     0    -8   -24   -15   -13  -.06   10    9 |    -357     775      8    178
igr  n/a|    0     0     0   -12   -13   -24  -.01    4    4 |    2148     824     11    104
jpl   80|    1     0     5    14   -24     1   .19    9    9 |    1051     868      8     85
mit  352|    0     0    -2   -25    37   -30  -.03    7    6 |    1537     787     26   1237
ngs  212|    0     0     6   -21    35   -21  -.07   10   10 |    -795     431    803   1634
sio  422|   -1     0     0    82     1   121  -.04    8    7 |     ---     ---    ---    ---

       
       
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 3.2157.0   GPS week: 2157   Day: 0   MJD: 59343.000                            

        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 |    6   16    4    6   15    3    7    5    6   10    3 |    30   32   27   29   34   29   32   28   31   32    29
   2E |   10   10   11    9   16    5    9    9    7   14    3 |    77   73   72   75   81   73   73   71   73   71    73
   3  |    6    7    7    9   11    3    8    7    7    6    2 |    28   32   30   29   29   29   33   28   27   28    28
   4  |    6   12    6    8    9    4   13    8    7    9    3 |    76   73   75   77   75   74   75   77   77   77    75
   5  |    6    6    7   11    7    4    6    9    8    6    2 |    50   50   50   53   53   51   51   47   50   46    49
   6E |    7   12    8   10   14    4   11    8    9    9    3 |    49   49   50   51   51   51   50   47   54   48    49
   7E |    6   11   10    8   13    5    9    9   10    6    3 |    59   60   59   58   63   58   59   57   59   58    58
   8  |    7    8    7   10    9    3    8    7   11    7    3 |    21   24   22   20   25   20   26   20   22   19    20
   9  |    8    9    8    6    7    4    8    6    5    7    2 |    37   40   36   36   38   36   41   39   38   37    37
  10  |    7    7    7    7    9    3    8    8    8   10    3 |    33   36   33   34   34   32   36   32   32   32    32
  12  |    8   17    6    8    9    3    9    7    8    8    3 |    32   32   28   34   31   30   34   33   32   34    31
  13  |    7    9    5   10    8    5    8    7    7    9    2 |    28   32   27   30   27   27   32   30   29   29    28
  14  |    6   10    9    9   12    4    9    6   10    5    3 |    71   70   67   72   78   69   67   71   67   68    69
  15  |    5    9    6    9    7    4    5    9    7    9    2 |    49   51   49   48   48   47   49   45   43   47    47
  16  |    5   21    6    9   12    6    9    7   11    8    3 |    22   24   22   24   23   23   23   21   24   19    21
  17  |    7    7    7   11    9    4    7    6    6    6    2 |    29   31   28   33   31   30   32   28   32   28    29
 X18E |   13   23    8   25   20    5   12   11   24  ---    6 |    65   66   67   74   65   69   73   67   72  ---    67
  19  |    7   11    6   13    9    3   10    6    7    9    3 |    33   35   33   39   31   34   34   33   38   31    33
  20  |    6    8    7    9   10    3    6    9    7    9    2 |    51   54   53   54   53   53   54   53   55   55    53
  21E |   12    8    8    9   20    5   10    5    7    9    3 |    49   45   42   45   40   43   46   45   44   48    44
  22  |    7    7    6    7    8    3    8    5    9    9    2 |    30   32   30   32   29   31   33   29   34   34    30
  23  |    7    8    6    9    9    3   10    8    7    9    2 |    68   69   70   72   67   70   68   72   74   70    69
  24  |    7   11    7   10   12    4   10    6   11    7    3 |    26   22   24   24   26   24   25   26   23   25    23
  25  |    7    8    6    6    9    3    7    6    9    6    2 |    27   28   27   26   26   26   29   27   25   27    26
  26  |    5    9    8   12   10    3    6    6    8    6    2 |    36   37   38   40   39   38   39   36   37   35    36
  27  |    6    8    8   10   11    3    7    8   10    8    3 |    21   24   23   25   26   22   23   22   23   20    21
  28  |    6   11    5    8    9    3    8    4    6    5    2 |    18   23   20   21   21   19   24   21   21   21    20
  29  |    8   15    6   11   10    4   10    5    9    8    3 |    31   34   31   35   31   30   32   31   34   33    31
  30E |   10   13    6    7   15    4   12    7   10    8    3 |    33   36   31   34   39   34   35   32   34   31    32
  31E |    7    9    7   13   14    4    7    7   10    7    3 |    51   52   49   50   52   49   51   51   48   50    49
  32  |    6    8    7    9    7    3    8    6    9    7    2 |    41   42   41   39   41   40   44   39   40   38    40
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   11    7    9   11    4    9    7    8    8      |T   41   42   40   42   42   40   42   40   41   39    40
 WRMS |    7   11    7    9   10    4    9    7    8    8      |NE  39   40   39   40   40   39   41   39   39   39    39
 MEDI |    7    9    7    9   10    4    8    7    8    8      |MD  33   36   33   36   38   34   36   33   37   34    33

Table 3.2157.1   GPS week: 2157   Day: 1   MJD: 59344.000                            

        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 |    6   13    7    7   13    3    6    7    6    7    3 |    38   39   36   38   40   37   39   38   39   37    37
   2E |   11   10   11    9   15    3   10   11    9   11    4 |    66   61   60   61   71   61   60   58   62   57    60
   3  |    7    7    6    6   10    3    7    7    8    7    2 |    30   36   31   30   30   30   36   30   36   31    31
   4  |    6   12    6   10    9    4   13    9   10   10    3 |    65   63   62   68   64   64   64   65   66   65    64
   5  |    7    7    8    9    8    4    7    6    9    8    2 |    40   38   40   41   42   39   43   39   41   36    39
   6E |   11   15    8    9   11    3    9    8    7    7    3 |    52   51   51   49   56   51   51   51   51   49    50
   7E |    6   11   11   12   19    6   10    8   12    8    3 |    56   53   54   56   61   56   54   57   57   56    55
   8  |    7   10    6   10    9    4    7    4    8    6    2 |    25   29   24   26   28   25   29   26   25   24    25
   9  |    9    7    8   10    5    3    8    8   10    8    3 |    42   45   42   45   42   43   45   43   45   41    42
  10  |    5    9    8    8    7    3    8    8    8   11    3 |    35   36   35   37   37   36   37   36   37   32    35
  12  |    6   19    7   10    7    4   11    9    6    7    3 |    33   38   31   32   34   32   36   36   34   34    33
  13  |    6   10    7    8    7    4    9    7    7    9    2 |    28   32   27   29   28   29   33   30   30   30    28
  14  |    7   14   11   12   15    4   11    6   11    9    3 |    50   50   47   56   58   50   47   49   48   49    49
  15  |    4    9    7    8    6    4    7   10    9   10    2 |    36   37   36   35   36   36   37   36   36   34    35
  16  |    5   23    7    8   11    6   10    6   10    8    3 |    26   28   23   26   27   25   25   26   27   23    25
  17  |    6   11    8    9   10    4    7    7    8    9    3 |    32   33   31   35   34   32   35   33   35   32    32
 X18E |   13   27    7   22   21    7   15   11   18  ---    6 |    58   62   58   58   60   58   62   59   65  ---    58
  19  |    6   12    7   10   10    3    8    6    9    6    3 |    34   36   36   36   33   34   37   36   35   35    34
  20  |    7    9    7   11    8    4    7    9    8   12    3 |    50   51   51   49   52   50   53   51   52   49    50
  21E |   19   10    5    9   19    4    9    7    9   10    4 |    46   51   47   50   42   49   49   53   54   52    48
  22  |    5    6    5    7    8    4    6    6    8    5    2 |    36   38   33   33   33   34   37   36   39   35    35
  23  |    6   11    6   12    8    4    9    9    9   10    3 |    52   54   52   54   52   52   52   56   57   54    53
  24  |    7   11    6   10   12    4    9    7    6    7    3 |    25   27   27   24   30   27   29   28   28   26    26
  25  |    6   12    7   11    9    4    9    6    7   11    3 |    30   31   31   28   32   30   33   32   32   30    30
  26  |    5    8    7   13    9    3   10    6    9    6    3 |    41   43   41   44   42   41   41   41   42   39    41
  27  |    5    7    7   11   10    3    7    5    9    8    2 |    28   29   26   31   32   27   28   29   27   26    27
  28  |    6   11    8    6   10    3    8    5   10    5    2 |    24   27   24   27   26   26   27   26   30   26    25
  29  |    5   15    4   10    9    3   11    5    6   10    3 |    32   32   28   32   32   30   31   31   32   29    30
  30E |   11   13    6    9   13    4   12    7   12    7    3 |    40   42   38   40   44   40   41   39   42   38    39
  31E |    7   10    6   12   17    4    8    9   15    7    3 |    50   54   51   50   52   51   50   50   53   49    50
  32  |    6    8    6    9    8    3    7    8   11    7    2 |    43   46   43   42   43   42   46   42   45   39    42
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   11    7   10   11    4    9    7    9    8      |T   40   41   39   40   41   39   41   40   42   38    39
 WRMS |    6   11    7   10   10    4    9    8    9    8      |NE  36   38   36   37   38   36   39   37   38   36    36
 MEDI |    6   11    7   10   10    4    9    7    9    8      |MD  38   38   36   38   40   37   39   38   39   35    37

Table 3.2157.2   GPS week: 2157   Day: 2   MJD: 59345.000                            

        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   15    8    8   12    4    6   10    9   15    3 |    25   27   23   26   24   23   24   26   28   33    24
   2E |   11   11    9   11   13    5    8   10    8   10    3 |    57   55   51   57   56   53   51   50   51   51    52
   3  |    6    6    7    9    8    3    7    6    9    9    2 |    22   26   23   17   22   22   28   22   24   23    22
   4  |    6   13    5   11    9    4   13    9   11    8    3 |    62   62   64   64   61   63   63   63   66   64    63
   5  |    8    8    8   13    6    4    6    8   11    8    3 |    38   34   36   37   37   35   37   33   34   34    35
   6E |    9   11    8   14   13    4   10    8    7    6    3 |    29   30   27   27   28   26   30   29   29   33    27
   7E |    6   12   10    8   10    8    9   12   13    8    3 |    41   41   40   38   38   41   41   41   43   44    40
   8M |    4    7    7   11    9    3    7    9    8    9    2 |    22   26   23   22   22   21   26   25   21   24    22
   9  |   10    9    6   10    8    2   10    8    6    8    3 |    31   38   33   29   32   33   39   33   35   34    33
  10  |    5    6    7   10    8    4    6    8    7   12    2 |    30   31   29   32   29   30   33   28   30   31    29
  12  |    8   16    7   11    6    4    8   10    9    9    3 |    27   29   23   30   25   25   26   27   25   28    25
  13  |    7    9    6   12    7    4    8    8   11    7    3 |    20   28   21   25   19   23   30   22   24   23    22
  14  |    8   12   10   10   11    4    9    6    9    9    3 |    55   54   53   55   61   54   53   55   54   57    54
  15  |    5    9    6   13    6    5    7   12    8   10    3 |    39   40   38   41   38   37   40   36   32   37    37
  16  |    5   21    5   10   13    6   10    7   11    9    3 |    22   24   22   25   23   23   22   22   26   23    21
  17M |    6    9    5   13    7    4    8    8    8    6    2 |    26   30   27   33   26   28   32   28   29   28    27
 X18E |   15   31    8   24   22    6   12   12   32  ---    7 |    49   54   50   57   44   50   53   49   55  ---    48
  19M |    6   11    7   22    8    4    9    7    9    7    3 |    28   31   29   41   26   29   30   32   30   30    29
  20M |    6    8    6    9    8    3    5   11    8   10    2 |    53   54   50   53   52   52   52   54   54   55    52
  21E |   18   14   13   15   30    9   12   30   15   36    7 |    37   39   39   43   41   39   38   56   48   66    40
  22M |    5    9    7   10   15    5    6    9   10   11    3 |    25   28   23   26   23   25   27   29   30   29    25
  23  |    8    9    5   13    9    5    9    9   10   11    3 |    39   41   41   44   38   41   43   41   44   43    41
  24  |    7   10    6   12   11    4   10    8   10   11    3 |    27   25   24   25   30   25   26   24   24   28    24
  25M |    8    9    8   12    8    3    6    7    8    8    3 |    30   31   30   31   30   29   30   30   27   30    29
  26M |    7   10    6   14    9    3    6    7    8    6    3 |    28   28   29   32   29   28   30   28   27   27    28
  27M |    4    8    6   16   10    3    7    5    9    7    2 |    25   28   26   28   28   25   27   26   27   26    25
  28  |    6   10    5   13    8    3    8    4    6    6    2 |    24   29   24   28   26   25   28   25   26   28    25
  29M |    7   16    6   11    7    4    9    6    9    8    3 |    26   28   23   30   26   25   26   25   25   28    25
  30E |   13   14    6    8   13    4   12    7    9    7    3 |    30   36   33   31   32   32   35   30   35   32    31
  31E |   10   13    7   12   17    4    7    7   14    7    3 |    56   55   52   50   57   52   54   53   59   54    53
  32  |    5   12    6   10    9    4    8    7   10   10    3 |    40   44   39   37   41   41   46   40   43   44    40
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   11    7   12   11    4    8   10   10   11      |T   34   36   33   35   34   34   36   34   35   36    33
 WRMS |    7   11    7   11   10    4    8    8    9    8      |NE  33   36   33   34   34   33   36   33   34   35    33
 MEDI |    7   10    7   11    9    4    8    8    9    8      |MD  30   31   29   32   30   29   32   30   30   31    29

Table 3.2157.3   GPS week: 2157   Day: 3   MJD: 59346.000                            

        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 |    5   12    6    9    8    4    6    8    8    6    2 |    45   44   46   45   46   46   45   45   45   45    45
   2E |   10   12    8   11   12    4    9    9    7    9    3 |    48   50   48   49   52   48   48   48   46   47    47
   3  |    6    8    8    9   10    3    7    7    8    6    2 |    42   46   44   44   42   43   47   42   42   42    43
   4  |    6   16    4    7   10    2   16    7    7    8    3 |    54   55   54   54   56   54   57   55   59   55    55
   5  |    7    7    7   10    6    4    8    7    9    9    2 |    49   50   50   51   48   50   51   47   53   47    49
   6E |    6    9    8   17   10    3   10    5    8    8    3 |    47   48   47   47   46   47   45   46   46   47    46
   7  |    4   10   10   10   24    4    7    9    9    7    3 |    47   47   45   47   51   48   45   47   50   47    46
   8  |    6    9    8    7    8    3    6    6    7    5    2 |    37   39   38   39   39   38   40   36   38   35    37
   9  |    6    8    6    8    6    2    9    6    5    6    2 |    39   46   40   40   41   42   47   42   44   41    41
  10M |    6    7    6    8    8    4    7    4    5    8    2 |    35   39   36   36   36   37   40   35   38   35    36
  12  |    8   17   10   10    6    7   11   10    7    8    3 |    38   45   39   39   42   40   42   41   39   40    39
  13  |    7    9    5    9    8    4    9    6    9    8    2 |    38   44   40   40   41   40   43   38   41   38    39
  14  |    9   11    9   10   10    5    8    5    9   10    3 |    69   64   66   72   68   69   65   67   65   67    67
  15  |    7    9    6    9    7    5    7   10    9    7    2 |    54   57   55   55   54   54   54   54   51   53    53
  16  |    5   22    7    7   10    7    9    5    9    9    3 |    38   41   37   40   37   39   39   35   40   34    37
  17  |    6    9    6    8    9    4    8    7    7    5    2 |    43   44   39   43   42   41   42   41   41   40    41
 X18E |   13   26   10   24   26    7   13   12   15  ---    6 |    46   54   53   55   49   51   55   50   49  ---    49
  19  |    5   12    6    9    9    4   10    7    6    7    2 |    41   43   38   41   41   39   38   39   39   37    39
  20  |    9    9    5   10    8    4    6    8    9    9    3 |    44   45   42   44   46   44   46   46   48   48    45
  21E |   15    9    8    8   22    4    7    6    8    9    4 |    39   41   43   43   35   42   40   43   42   47    41
  22  |    5    8    6    7   11    2    7    5    8    5    2 |    43   46   43   44   44   42   45   43   45   42    43
  23M |    7    6    4   13    7    4   10    6    8    9    2 |    53   53   53   54   56   52   54   55   55   57    54
  24  |    8   11    7   14   10    5   10    7    9    8    3 |    40   39   38   38   40   39   40   40   39   37    38
  25M |    7   15    8   10    9    4    9    7    9    8    3 |    38   45   39   38   39   38   42   38   37   39    38
  26  |    6   10    8   13    8    3    7    5    8    7    2 |    54   54   55   55   56   53   56   54   52   54    54
  27  |    6   10    6   10    7    3    6    4    6    6    2 |    35   36   36   37   35   36   38   33   36   32    34
  28  |    7    9    7    9   10    4    8    5    9    7    2 |    33   34   33   35   34   34   34   32   37   33    33
  29  |    7   14    7   10    8    4   11    4   10    8    3 |    38   41   36   40   40   38   38   37   40   39    37
  30  |    8   14    7   14    9    3   15    6   12    9    3 |    49   55   49   47   48   50   54   48   54   47    49
  31E |    7   10    8   12   14    7    7    9   12    9    3 |    75   80   75   77   75   77   77   76   83   75    76
  32  |    6   11    6   12    7    3    7    5    6    8    2 |    39   44   38   38   37   40   43   41   41   39    39
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   11    7   10   10    4    9    7    8    8      |T   44   47   45   46   45   45   46   44   46   44    44
 WRMS |    7   11    7   10    9    4    9    6    8    7      |NE  44   47   44   45   45   45   46   44   45   43    44
 MEDI |    7   10    7   10    9    4    8    6    8    8      |MD  43   45   43   44   42   42   45   43   44   42    43

Table 3.2157.4   GPS week: 2157   Day: 4   MJD: 59347.000                            

        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 |    7   14    5    6   11    3    7    5    8    7    2 |    23   26   23   24   23   24   25   24   24   24    23
   2E |   10   10    9    8    8    6    8    6   10   10    3 |    48   48   47   48   49   46   48   49   52   51    48
   3  |    7    7    7    8   10    4    8    7    8    6    2 |    27   30   26   27   24   26   32   25   25   29    26
   4  |    7   16    5    6    8    3   16    8   10    8    3 |    56   57   55   55   57   57   59   59   60   58    57
   5  |    7    7    7   10    8    3    7    5    7    7    2 |    37   37   35   40   34   36   38   36   33   34    35
   6E |    8   11    6   17   10    4    8    9   10    8    3 |    34   34   35   34   34   33   37   34   37   35    34
   7  |    5   16   10   12   14    4    8    9   12    8    3 |    49   51   49   52   52   50   49   52   52   52    50
   8  |    6    8    6   10   10    3    8    4    9    6    2 |    20   24   21   25   23   20   25   20   22   20    21
   9  |    7   10    6   10    6    4   10    6    8    7    2 |    28   33   29   28   28   29   36   30   29   31    29
  10  |    8    7    6   11    8    3    9    6    7   11    2 |    25   27   26   28   24   26   29   24   28   26    25
  12  |    9   15    7    9    8    8   10    7    8    5    3 |    27   28   25   28   25   25   28   29   29   28    26
  13  |   10   11    7    9    8    4    9    6    8    7    3 |    29   35   30   33   29   30   36   30   33   31    30
  14  |    9   14   11   12    9    6   11    8   10    9    3 |    50   50   50   55   55   51   51   51   50   52    51
  15  |    7    8    8    9    5    5    7    7   10    8    2 |    39   36   35   39   33   36   38   36   31   35    35
  16  |    6   21    6    8   10    4   10    6    8    7    3 |    18   21   20   22   19   19   23   20   21   20    19
  17  |    6    9    6    8    7    4    8    5    7    7    2 |    24   27   23   28   25   25   31   26   27   25    25
 X18E |   12   23   10   24   22    7   12   12   20  ---    6 |    43   48   46   48   46   48   48   46   52  ---    45
  19  |    7    9    5   12    9    4    9    5   10    7    2 |    27   26   27   29   25   25   28   27   27   28    26
  20  |    9    9    6   12    9    4    8    9    9   12    3 |    53   55   53   57   54   54   53   56   55   57    54
  21E |    8    9    6    8   10    5    8    4    7    7    2 |    33   30   31   29   35   29   28   33   29   35    31
  22  |    7    7    6    5   10    3    7    5    9    6    2 |    25   27   21   23   23   24   26   24   25   25    23
  23  |   10   13    4   12   10    4    9    9    9    9    3 |    48   53   47   52   51   48   50   50   54   53    50
  24  |   10   10    7   15   10    5    9    6    8    7    3 |    23   22   24   22   22   21   26   23   21   23    21
  25  |    7   13    7   10    9    3    8    5    7    7    2 |    23   28   26   23   23   23   27   24   23   24    23
  26  |    8    9    8   14    8    3    9    6   11    6    3 |   111  111  113  115  112  113  113  111  114  112   112
  27  |    5    8    6    9   12    3    9    4   10    7    2 |    20   21   21   25   23   20   22   20   21   20    20
  28  |    9   11    7    9    8    4    9    5    9    7    3 |    19   21   21   24   20   20   25   21   21   23    20
  29  |    8   15    5    7   10    4    8    5   10    7    3 |    26   26   25   25   24   24   26   24   28   25    24
  30  |    9   16    7   22   23    4   14    7    9   10    4 |    49   54   51   50   52   49   53   48   52   48    49
  31  |    8   10    6    9   15    5    6    8   11    9    3 |    62   66   64   63   63   63   65   62   69   65    64
  32  |    9    9    7   10    8    3    9    6    8   12    3 |    32   35   31   31   30   32   37   30   34   32    31
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   12    7   11   10    4    9    6    9    8      |T   36   38   36   38   36   36   39   36   38   37    36
 WRMS |    8   12    7   10    9    4    9    6    9    8      |NE  32   33   31   33   31   31   35   32   32   33    31
 MEDI |    8   10    6   10    9    4    9    6    9    7      |MD  29   33   30   29   29   29   36   30   29   31    30

Table 3.2157.5   GPS week: 2157   Day: 5   MJD: 59348.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1E |    7  ---    6    9   10    2    8    5   10    6    3 |    18  ---   18   22   19   19   21   18   22   18    18
   2E |    7   17    9   10    9    6    8    6   10    4    3 |    45   49   41   42   45   41   41   45   44   44    43
   3  |    8   11    6    9    9    3    8   10   10    7    3 |    28   34   29   32   27   28   33   31   28   33    29
   4  |    7   18    4    9    7    3   18    7    7    7    3 |    40   37   40   41   41   38   37   40   42   38    39
   5  |    6   10    6    9    7    5    9    6    9    6    2 |    29   35   27   27   30   29   32   30   28   28    28
   6E |    8   41    7   14    8    3    7    6    9    6    4 |    36   57   35   35   38   36   37   37   37   37    36
   7  |    5   16   10    9   11    4    9    8    8    6    3 |    88   90   87   89   90   89   89   89   89   89    88
   8  |    8   12    7    8    9    3    8    6    6    5    2 |    23   29   24   25   24   23   25   22   21   22    22
   9  |    8   11    6    8    5    2   10    5    6    5    2 |    19   30   20   19   16   19   27   17   18   17    18
  10  |    7    9    7    7    8    3    9    7    8   10    2 |    19   24   21   21   19   20   23   18   20   18    19
  12  |    6   19    5   14    7    4   10    8    9   10    3 |    23   27   20   25   21   21   23   24   24   25    22
  13  |    7   12    7   13    9    4    9    7    9    8    3 |    31   37   32   34   33   33   37   33   34   33    32
  14  |   10   15   13   14    9    6   10    7   11    7    3 |    41   43   40   46   46   39   40   42   43   42    42
  15  |    6   15    6    9    5    4    7    8   10    8    3 |    33   42   32   35   32   32   35   36   33   33    33
  16  |    7   23    6   11   13    4   10    4    8    8    3 |    19   21   18   23   20   20   21   20   19   19    18
  17  |    6   14    5    8    7    3    8    5    9    6    2 |    23   29   22   25   22   23   26   22   23   22    22
 X18E |   12   24   11   29   17    6   12   14   18  ---    6 |    34   39   40   38   37   36   40   37   39  ---    35
  19  |    6   14    6   12    7    4    8    5   10    5    2 |    26   30   26   29   23   25   27   24   27   23    25
  20  |    8   15    7    9    8    5    9   10    8   11    3 |    21   24   19   18   18   17   21   18   19   20    18
  21E |    8   15    8    8    8    4    7    5   12    8    3 |    31   31   28   30   32   29   26   31   35   31    29
  22  |    6   10    7    9    8    3    7    6   10    5    2 |    25   32   27   29   28   27   29   28   27   29    27
  23  |    8   12    7   12    9    2   11   10   11   11    3 |    54   51   54   57   51   53   50   51   53   53    52
  24  |    9   13    7   13    8    4    9    7    8    8    3 |    22   24   22   21   22   21   24   21   19   23    20
  25  |    7   14    8   14    9    3   10    6    8    6    3 |    23   31   23   24   24   23   27   24   23   24    23
  26  |    9   12    7   19    9    4    8    4    8    6    3 |   174  175  173  178  173  174  174  173  173  172   174
  27  |    7   11    6   10   13    3    7    4    7    7    2 |    25   26   25   26   27   24   26   23   22   24    23
  28  |    7   14    7    8    7    4   10    5    8    6    2 |    19   25   21   24   20   21   24   22   22   23    21
  29  |    9   20    5    9   10    3   12    6   10    8    3 |    24   25   22   24   22   22   23   22   22   22    21
  30  |    7   14    7    7   11    3   11    7    8    9    3 |    62   65   63   63   62   64   63   61   63   59    61
  31  |    7   12    6   11   18    5    9    7   10    7    3 |    40   41   40   40   43   39   41   40   40   42    39
  32  |    7   10    8    7    8    2    9    7    7    9    3 |    18   26   20   17   15   18   26   16   18   18    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   16    7   11    9    4    9    7    9    7      |T   35   40   35   37   36   35   37   35   36   36    35
 WRMS |    7   16    7   10    8    4    9    7    9    6      |NE  26   31   26   28   26   26   29   27   27   27    26
 MEDI |    7   14    7    9    9    4    9    6    9    7      |MD  26   31   27   29   27   27   27   28   27   25    27

Table 3.2157.6   GPS week: 2157   Day: 6   MJD: 59349.000                            

        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 |    4   20    9    9    8    4    8    6   10    6    3 |    32   35   33   32   35   30   32   31   30   32    31
   2E |   10    8   11   11    8    6    8    5    7   11    3 |    61   59   58   60   61   58   59   62   60   63    60
   3  |    4    8    7    8    9    3    6    5    8    9    2 |    26   33   29   31   28   28   32   29   29   30    28
   4  |    6   16    6   11    8    3   18    8   10    9    3 |    65   61   64   64   64   64   66   66   70   66    65
   5  |    7    7    6   11    8    4    7    6    6    8    2 |    53   51   51   51   50   50   50   48   47   46    49
   6E |    7   13    7   34    9    5    6    8   11    7    4 |    54   52   52   54   53   52   52   54   54   53    52
   7  |    5   11    9    9   12    4    9    8   13    9    3 |    87   87   86   87   87   87   88   87   89   88    87
   8  |    5    7    7    7    8    2    9    4    9    5    2 |    19   23   20   20   22   18   22   18   20   17    19
   9  |    6   10    6    9    7    3    8    5    9    5    2 |    19   27   21   20   18   19   28   20   20   18    20
  10  |    6    7    8   10   10    4    7    6    7    9    2 |    30   32   29   33   28   29   31   29   28   29    28
  12  |    7   16    7   10    9    4    8    8    8    5    3 |    28   29   24   29   27   25   28   28   26   28    26
  13  |    6    8    5   10    7    3    9    5    6    6    2 |    33   36   31   36   33   34   38   35   36   34    34
  14  |    6   13   10   16   10    6   10    7   14    7    3 |    62   62   61   68   71   64   60   66   63   62    63
  15  |    4   10    5   12    4    5    8    7    8    7    2 |    44   49   46   49   45   45   45   44   39   43    44
  16  |    8   21    6    6   13    5   10    6    8    8    3 |    21   23   21   22   20   21   23   21   20   18    20
  17  |    6   11    6   11    7    4    8    5   10   11    3 |    26   30   25   27   26   26   30   26   26   25    25
 X18E |   11   24    9   36   16    6   13   18   20  ---    7 |    54   59   57   62   54   56   59   58   60  ---    55
  19  |    7   13    6   11    8    4    7    5   12    7    3 |    31   35   30   35   28   31   32   31   33   32    30
  20  |    8    8    7   11   10    4    8   10    9   10    3 |    31   33   32   33   30   31   33   34   32   33    31
  21E |    7    9    7    8   11    4    8    4    8    6    2 |    44   39   41   42   41   39   40   44   41   43    41
  22  |    5    8    8    8    9    3    5    5    9    6    2 |    24   28   23   26   24   24   27   25   29   25    24
  23  |    8   10   11   10   10    5   10   13   11   13    3 |    66   68   64   67   65   67   67   71   71   70    67
  24  |    9   10    7   14    9    5   10    7   11   10    3 |    23   22   21   21   22   21   22   21   22   23    20
  25  |    5   10    8    9    9    3    8    5    8    7    2 |    35   38   36   35   35   34   37   34   33   34    34
  26  |    8   10    6   11   10    3    9    6   10    6    3 |   244  246  246  246  244  245  244  246  244  245   245
  27  |    5    7    6    8   10    3    8    3    6    7    2 |    20   23   22   21   24   20   24   20   21   20    20
  28  |    5   10    8    9    7    4    7    5   13    7    2 |    20   26   21   23   23   20   25   24   22   23    22
  29  |    6   15    4   11   12    5   11    6    8    8    3 |    33   33   29   32   33   29   32   30   31   33    30
  30  |    6   15    7   13   11    3   11    7   13    9    3 |    74   74   74   75   75   74   76   73   76   73    74
  31  |    6   12    7   14   18    5    6    7   11    8    3 |    54   55   55   58   57   55   57   55   55   54    55
  32  |    7    8    7    9   10    3    7    6    7   11    2 |    26   32   29   29   27   26   33   25   26   28    27
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    6   12    7   12   10    4    9    7   10    8      |T   46   48   46   48   46   45   48   46   46   46    46
 WRMS |    6   12    7   13    9    4    9    6   10    7      |NE  35   37   34   36   35   34   37   35   35   34    34
 MEDI |    6   10    7   10    9    4    8    6    9    7      |MD  33   35   32   35   33   31   33   34   33   33    31



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 4.2157   GPS week: 2157   MJD: 59343.0-59349.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |U   10    10    23 |U    9    14    31 |U   12    17    34 |
emr | emr 2962 |U   14    13    36 |U   14    22    49 |U   17    17    54 |
esa | esa 2976 |    12    11    32 |U    9    17    37 |    12    17    30 |
gfz | gfz 2975 |U    9    10    23 |U    7    13    36 |U   10    13    28 |
grg | grg 2974 |U   11    10    23 |U   12    19    59 |    12    20    32 |
igr | igr 2976 |     9    10    23 |     8    14    35 |    11    16    30 |
igs | igs 2976 |     9    10    23 |     8    14    34 |    11    16    31 |
jpl | jpl 2976 |U   10    12    31 |U   10    20    44 |    14    21    44 |
mit | mit 2976 |U   10    10    22 |U    8    14    37 |U   11    14    32 |



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 5.2157.0   GPS week: 2157   Day: 0   MJD: 59343.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    11     8    27 |     9    13    28 |    13    21    36 |
emr | emr 2976 |    11    13    33 |    13    21    39 |    16    19    54 |
esa | esa 2976 |    12    11    32 |     8    18    28 |    10    19    29 |
gfz | gfz 2976 |    10     8    25 |     6    12    28 |    11    17    30 |
grg | grg 2975 |    11     8    26 |     5    15    27 |    13    21    32 |
igr | igr 2976 |     9     8    25 |     6    12    28 |    11    18    31 |
igs | igs 2976 |     9     7    25 |     7    13    27 |    11    18    33 |
jpl | jpl 2976 |    10    10    30 |     9    19    32 |    14    21    43 |
mit | mit 2976 |    10     7    23 |    10    14    30 |    11    18    34 |

Table 5.2157.1   GPS week: 2157   Day: 1   MJD: 59344.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9    10    25 |     9    16    41 |    13    16    31 |
emr | emr 2976 |    13    14    38 |    17    25    64 |    16    12    45 |
esa | esa 2976 |    11    11    33 |    10    20    47 |    12    15    31 |
gfz | gfz 2976 |     8    10    25 |     8    18    46 |    10    13    26 |
grg | grg 2976 |     9    10    25 |     7    23    42 |    13    21    30 |
igr | igr 2976 |     8     9    24 |     9    19    45 |    12    14    28 |
igs | igs 2976 |     8    10    26 |     9    18    45 |    12    14    29 |
jpl | jpl 2976 |    10    14    32 |    11    23    54 |    16    19    41 |
mit | mit 2976 |     9     9    23 |     8    19    47 |    12    12    31 |

Table 5.2157.2   GPS week: 2157   Day: 2   MJD: 59345.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    11     7    22 |     7    15    33 |    12    15    29 |
emr | emr 2976 |    14    12    33 |    14    25    43 |    17    16    51 |
esa | esa 2976 |    12     8    34 |     8    20    39 |    11    14    29 |
gfz | gfz 2976 |     9     6    20 |     7    15    38 |     9    12    26 |
grg | grg 2976 |    11     7    21 |     8    17    32 |    10    19    27 |
igr | igr 2976 |    10     6    23 |     7    17    37 |    10    14    26 |
igs | igs 2976 |    10     7    22 |     6    17    34 |    10    14    26 |
jpl | jpl 2976 |    11    10    32 |     9    23    51 |    13    19    39 |
mit | mit 2976 |    11     7    25 |     7    18    40 |    10    12    27 |

Table 5.2157.3   GPS week: 2157   Day: 3   MJD: 59346.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    11    16    26 |     9    13    29 |    11    15    33 |
emr | emr 2976 |    13    15    40 |    15    19    46 |    16    16    59 |
esa | esa 2976 |    12    16    33 |     9    17    34 |    11    18    31 |
gfz | gfz 2976 |     9    15    25 |     6    13    31 |    10    12    25 |
grg | grg 2976 |    12    18    26 |     5    13    30 |    13    20    33 |
igr | igr 2976 |    10    16    25 |     8    13    33 |    11    15    29 |
igs | igs 2976 |    10    15    26 |     8    13    32 |    11    14    30 |
jpl | jpl 2976 |    10    14    33 |    10    18    45 |    15    21    43 |
mit | mit 2976 |    10    17    24 |     7    13    38 |    10    13    30 |

Table 5.2157.4   GPS week: 2157   Day: 4   MJD: 59347.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     8    10    22 |     8    14    24 |    12    20    41 |
emr | emr 2976 |    13    10    36 |    12    20    45 |    17    21    67 |
esa | esa 2976 |    11    12    37 |     8    16    30 |    13    20    34 |
gfz | gfz 2976 |     8    12    26 |     7    13    32 |    11    17    31 |
grg | grg 2971 |     9    12    23 |     7    14    25 |    13    24    40 |
igr | igr 2976 |     8    10    25 |     7    12    26 |    12    20    35 |
igs | igs 2976 |     8    10    25 |     7    12    27 |    12    20    38 |
jpl | jpl 2976 |    10    11    33 |     9    19    38 |    16    24    52 |
mit | mit 2976 |     8    11    25 |     7    10    29 |    12    18    40 |

Table 5.2157.5   GPS week: 2157   Day: 5   MJD: 59348.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    12    11    22 |    10    13    36 |    13    18    35 |
emr | emr 2880 |    19    14    36 |    15    25    60 |    21    22    48 |
esa | esa 2976 |    13    13    29 |    11    17    45 |    15    19    31 |
gfz | gfz 2975 |    11     9    18 |     9    13    43 |    11    16    30 |
grg | grg 2974 |    11    10    19 |    45    37   224 |    12    21    31 |
igr | igr 2976 |    11    11    19 |    10    14    42 |    13    18    31 |
igs | igs 2976 |    11    11    19 |     9    13    39 |    12    18    31 |
jpl | jpl 2976 |    11    13    31 |    11    22    51 |    15    22    42 |
mit | mit 2976 |    12    10    18 |     9    12    38 |    12    16    34 |

Table 5.2157.6   GPS week: 2157   Day: 6   MJD: 59349.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    11     7    18 |     9    13    29 |    11    13    36 |
emr | emr 2976 |    15    11    31 |    16    21    48 |    16    15    55 |
esa | esa 2976 |    11     9    29 |     9    15    34 |    12    15    29 |
gfz | gfz 2976 |    10     8    19 |     7    10    37 |     9     8    26 |
grg | grg 2976 |    11     8    20 |     7    14    32 |    12    17    34 |
igr | igr 2976 |     9     8    19 |     8    11    32 |    10    12    29 |
igs | igs 2976 |    10     7    18 |     8    11    32 |    10    12    31 |
jpl | jpl 2976 |    11    12    26 |    10    15    41 |    13    19    48 |
mit | mit 2976 |     9     7    18 |     7    11    36 |    10    12    32 |


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 6.2157   GPS week: 2157   MJD: 59343.500-59349.500

                                                         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 |     -17      -5      18    -142     -2 |      10     22
            |      15      16      53      58      6 |       4
emr   uuuuu |     -31     -14     236     188     -3 |      14     29
            |      16      40      90      99     11 |       3
esa   uuuuu |      18      -4      45      62     -2 |      14     23
            |       8      11      38      43      4 |       2
gfz   uuuuu |      12      12    -102      23      2 |      18     26
            |      20      13     123      95      7 |       2
grg   uuuuu |      -6       2     -18    -209     -1 |       4     18
            |      11      15      44      52      4 |       3
igr   xxxxx |       8      -1      29     -27      1 |      -3     18
            |       8      11      38      54      4 |       2
irf   xxxxx |      17       5     -77     -15      3 |      -2     21
            |      10       6      27      28      3 |       3
jpl   uuuuu |      33     -11      83      91      5 |      33     39
            |      19       6      19      46      7 |       2
mit   uuuuu |      10       8    -209      -8      2 |      26     33
            |      14      13      59      35      3 |       3
ngs   uuuuu |     -36      13      38      36      2 |      13     23
            |      33      34     128     159      1 |       3
sio   xxxxx |     -15      21    -266    -249     -9 |      41     47
            |      41      72     124     114      8 |       5


Table 7.2157.0   GPS week: 2157   Day: 0   MJD: 59343.500

                                                         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 |       4     -21     -38    -235      7 |       6     16
emr   uuuuu |     -47     -29     337     176    -19 |      17     24
esa   uuuuu |      23      -5      69      38     -1 |      15     19
gfz   uuuuu |     -21     -13     154    -116     -7 |      18     23
grg   uuuuu |       7       5     -54    -248      3 |       1     12
igr   xxxxx |      -3      20      13       5      0 |      -3     13
irf   xxxxx |       6      14     -71     -64     -1 |      -2     15
jpl   uuuuu |      13     -21     111     139      0 |      33     37
mit   uuuuu |      -7       5    -213     -24     -4 |      25     29
ngs   uuuuu |      10      72    -194     294      2 |      12     17
sio   xxxxx |      -1      50     -40    -377    -14 |      47     51

Table 7.2157.1   GPS week: 2157   Day: 1   MJD: 59344.500

                                                         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 |     -17      -3      29    -161      0 |       6     16
emr   uuuuu |     -41     -41     299     271     -8 |      14     24
esa   uuuuu |      13     -18      71      96     -9 |      14     19
gfz   uuuuu |     -10      16     -78      -5     -2 |      16     23
grg   uuuuu |      -3      19     -94    -208      5 |       1     13
igr   xxxxx |      13      -3     -28     -58     -2 |      -4     14
irf   xxxxx |      12       9    -113     -27      6 |      -4     17
jpl   uuuuu |      24      -4      71       2      9 |      32     36
mit   uuuuu |       7      -9    -274     -14      4 |      24     29
ngs   uuuuu |      11      47      83      76      1 |      10     17
sio   xxxxx |     -39      15    -358    -255     -4 |      44     49

Table 7.2157.2   GPS week: 2157   Day: 2   MJD: 59345.500

                                                         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 |     -28       9      -9    -137      3 |       8     17
emr   uuuuu |     -20     -18     157     287     10 |      13     24
esa   uuuuu |      19     -14      56      28     -2 |      14     19
gfz   uuuuu |      34      18    -161     153     -7 |      17     23
grg   uuuuu |     -27      12       6    -250     -2 |       3     14
igr   xxxxx |       6     -18      26     -34     -6 |      -4     14
irf   xxxxx |      32       1    -105      20      5 |      -3     17
jpl   uuuuu |      32     -16      97      89     -6 |      32     37
mit   uuuuu |      37       9    -297      36      3 |      25     30
ngs   uuuuu |     -60      13     148    -131      2 |      11     18
sio   xxxxx |      56     120    -326    -228    -21 |      43     49

Table 7.2157.3   GPS week: 2157   Day: 3   MJD: 59346.500

                                                         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 |     -42      22      10     -77     -1 |      16     26
emr   uuuuu |     -15     -51     222     200    -13 |      18     32
esa   uuuuu |      17      13     -22      -7     -5 |      19     28
gfz   uuuuu |      20      18    -205      91      6 |      21     30
grg   uuuuu |     -13       1      -3    -279     -1 |       9     22
igr   xxxxx |       5      -2      77    -107      3 |       1     20
irf   xxxxx |      21       6     -67      -9     -1 |       3     24
jpl   uuuuu |      70     -10      51     131     15 |      37     43
mit   uuuuu |       6       7    -135      23      3 |      31     39
ngs   uuuuu |     -40     -23     158     -42      4 |      17     27
sio   xxxxx |     -71      38    -308    -392      1 |      45     52

Table 7.2157.4   GPS week: 2157   Day: 4   MJD: 59347.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -7     -26     -36    -181     -5 |      14     26
emr   uuuuu |     -27     -16     322     183     -2 |      16     33
esa   uuuuu |      23       7      35     113      2 |      16     27
gfz   uuuuu |      21      14    -131     105      9 |      20     30
grg   uuuuu |      -1     -24     -15    -144     -5 |       8     22
igr   xxxxx |      16      -5      -3      62      2 |      -1     21
irf   xxxxx |      27       6     -88       9      1 |       0     26
jpl   uuuuu |      43      -6      91     102      7 |      35     42
mit   uuuuu |       1      33    -194       0      4 |      29     38
ngs   uuuuu |     -68      -3      98    -158      1 |      15     27
sio   xxxxx |       7      51    -318     -87     -3 |      42     49

Table 7.2157.5   GPS week: 2157   Day: 5   MJD: 59348.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -15      -7     109     -69    -10 |      10     25
emr   uuuuu |     -53      71      95     -16     10 |      11     31
esa   uuuuu |      29       2      16      82      0 |      12     25
gfz   uuuuu |      18       1     -92     -26      6 |      18     28
grg   uuuuu |      -3     -11      40    -151     -5 |       4     22
igr   xxxxx |      19       0      63      -9      3 |      -4     21
irf   xxxxx |       7      -4     -55      -3      5 |      -4     25
jpl   uuuuu |      20      -5      76      72      5 |      32     39
mit   uuuuu |       8      -1    -196      -1      4 |      25     34
ngs   uuuuu |     -43      -9      45      68      3 |      12     25
sio   xxxxx |     -39     -10    -366    -133    -13 |      37     44

Table 7.2157.6   GPS week: 2157   Day: 6   MJD: 59349.500

                                                         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      -7      61    -131     -5 |       9     24
emr   uuuuu |     -13     -16     220     217      2 |      12     31
esa   uuuuu |       5      -9      89      82      1 |      12     24
gfz   uuuuu |      23      28    -203     -37      7 |      18     28
grg   uuuuu |      -5      14      -6    -183     -5 |       4     22
igr   xxxxx |       1      -1      55     -50      6 |      -4     21
irf   xxxxx |      16       4     -37     -27      4 |      -4     25
jpl   uuuuu |      32     -15      83     104      5 |      32     39
mit   uuuuu |      18      15    -154     -72      1 |      25     34
ngs   uuuuu |     -61      -2     -71     145      1 |      12     25
sio   xxxxx |     -17    -115    -143    -271     -6 |      33     38


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