[IGSREPORT-18010] Wk 1556 IGS Final Orbits

Jim Ray IGS.ACC at noaa.gov
Thu Nov 19 05:21:20 PST 2009


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IGS Electronic Report   19 Nov 05:21:43 PST 2009      Message Number 18010
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Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1556   (Nov 01, 2009 - Nov 07, 2009)

Contacts: J. Ray       (jim.ray at noaa.gov),
          J. Griffiths (jake.griffiths 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. 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, no satellite L1/L2 delay calibration should be
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. 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 (weights are those from the orbit combination). 
Pole rate combination uses only centres providing estimated pole rates.

  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 3 weeks (21 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:

igs1556[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1556[0-6].clk  IGS GPS satellite and station clocks in SP3 format.
igs1556[0-6].cls  IGS GPS clock combination summary report.
igs15567.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs15567.sum      Complete report.

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

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, MIT, and
    JPL. The other centres are excluded because they either provide broadcast
    clocks (NGS) or clock corrections are not provided (SIO).  The clock
    information not used is still compared to combination for completeness.  
    The value of 999999.999999 microseconds, according to the sp3 format 
    convention, is used to signify that no clock solution is available and 
    therefore must not be used.

 2. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1478, a new solution from CNES/GRGS (GRG) is included for
    evaluation and statistics 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  |  ALL   | 1
                0  |  COD   | 9 4 9 27 DRAO
                0  |  ESA   | 4 8 9 24 27
                0  |  GFZ   | 2 8 9 13 16 27 31 ALRT AREQ ASPA AUCK BOGT BOR1 BRFT
                0  |  GFZ   | CHPI DUBO GODE GUAT HYDE IRKT KIRU MCM4 MDO1 NRMD
                0  |  GFZ   | OUS2 PIE1 PIMO PRE1 RAMO SFER STJO TIXI TOW2 TSKB
                0  |  GFZ   | UNSA WTZR YELL YKRO
                0  |  GRG   | WTZR
                0  |  JPL   | 32
                0  |  MIT   | 24 24 MIZU MIZU NYA1
                1  |  ALL   | 1 1
                1  |  COD   | 9 9 24 27
                1  |  EMR   | 30 30
                1  |  ESA   | 8 9 27
                1  |  GFZ   | 2 4 7 8 9 14 21 24 27 31 ALGO ALIC AREQ BUE1 CONZ
                1  |  GFZ   | FAA1 GODE HRM1 JPLM KERG KOUC MAC1 MBAR MCM4 MDO1
                1  |  GFZ   | PDEL PRDS SEY1 SFER VILL WSRT YKRO
                1  |  GRG   | ONSA
                1  |  JPL   | 32
                1  |  MIT   | 27 MIZU PTBB HARB MIZU PTBB
                2  |  ALL   | 1
                2  |  COD   | 9 9
                2  |  EMR   | WTZR
                2  |  ESA   | 8 9
                2  |  GFZ   | 4 5 9 13 21 22 24 27 ALIC ALRT BOR1 CONZ CRO1 DAEJ
                2  |  GFZ   | GUAT HYDE IRKT KERG LPGS MCM4 MDO1 NICO NRC1 NYA1
                2  |  GFZ   | NYAL ONSA RAMO SANT TEHN THTI TIXI TOW2 TSKB TWTF
                2  |  GFZ   | UNSA XMIS YSSK
                2  |  GRG   | WTZR
                2  |  JPL   | 32 DGAR
                2  |  MIT   | 24 27 24 27
                3  |  COD   | 9 27 9 27
                3  |  EMR   | 8 31 8 WTZR
                3  |  ESA   | 9 27 UNSA XMIS
                3  |  GFZ   | 7 8 9 11 15 17 24 29 32 ALGO ASPA BOGT BRFT BRUS
                3  |  GFZ   | CAS1 CHPI GRAZ GUAT HARB IRKT KIRU KOUC MATE MDO1
                3  |  GFZ   | NRC1 RIOP THTI THU3 WSRT YELL YKRO ZIMM
                3  |  GRG   | ONSA
                3  |  JPL   | 32
                3  |  MIT   | 24
                3  |  NGS   | 1
                4  |  COD   | 9 9
                4  |  EMR   | 25 31 25 31 WTZR
                4  |  ESA   | 9
                4  |  GFZ   | 5 9 16 22 23 27 30 ALGO ALIC AREQ BOR1 BRUS CHPI
                4  |  GFZ   | DARW DAV1 FAA1 FAIR GOLD GUAT HARB HOLM KARR KERG
                4  |  GFZ   | KIRU KOUC LPGS MAS1 MBAR MIZU NRC1 NRMD NYA1 ONSA
                4  |  GFZ   | PDEL PETS PIE1 PRDS QAQ1 RABT RIOP SANT SFER STJO
                4  |  GFZ   | THTI TSKB ULAB WSRT WTZR XMIS YAKT YSSK ZIMM
                4  |  GRG   | WTZR
                4  |  JPL   | 32
                4  |  MIT   | 24 24
                4  |  NGS   | 1
                5  |  COD   | 9 27 9 27 DAEJ DAEJ
                5  |  EMR   | WTZR
                5  |  ESA   | 9 27
                5  |  GFZ   | 3 5 7 9 17 24 27 28 32 ADE1 ALIC AMC2 AREQ ASPA AUCK
                5  |  GFZ   | BOR1 BRAZ BRFT CHAT COCO DAV1 DUBO EIL1 FAIR FLIN
                5  |  GFZ   | GLPS GLSV GODE GUAM GUAT HARB IRKT MAC1 MAS1 MCM4
                5  |  GFZ   | MDO1 NRC1 NRMD NYA1 ONSA OUS2 PDEL PIE1 PIMO PRDS
                5  |  GFZ   | RABT RIOP THU3 TOW2 TRO1 TWTF WAB2 WTZR XMIS YKRO
                5  |  GRG   | WTZR
                5  |  JPL   | 32 DGAR
                5  |  MIT   | 24 24 ALGO ALGO
                5  |  NGS   | 1
                6  |  ALL   | 24
                6  |  COD   | 9 27 9 27
                6  |  EMR   | ONSA
                6  |  ESA   | 9 27 UNSA
                6  |  GFZ   | 5 7 9 24 27 31 ALIC AREQ BRAZ BRFT CHUR FLIN HARB
                6  |  GFZ   | HOFN HOLM KOUC MAS1 MBAR MCM4 MIZU NICO THTI XMIS
                6  |  GRG   | ALGO WTZR
                6  |  JPL   | 32 DGAR MCM4
                6  |  MIT   | 24 HARB
                6  |  NGS   | 1

 5. The following orbit solutions were excluded from the combination because 
    they were biasing the weighted average (generally indicated by long arc RMS).
    They were still used for statistics computation.
    
               Day | Centre | PRN list
               ----+--------+---------------
                0  |  NGS   |  24
                4  |  NGS   |  24
                5  |  NGS   |  24
                6  |  NGS   |  24

 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 G24 |    |    |    |    |    |  2 |  1 |
           PRN G25 |    |    |  1 |    |    |    |    |

 7. Starting on 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) 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.

 8. Small rotations were applied to the all AC orbit and ERP values in order
    to align them to the IGS05. These rotations were estimated in the process
    of the IGS SINEX combination, performed at NRCan by Remi Ferland, are based 
    on the common stations between the individual AC SINEX solutions and the 
    IGS05.snx SINEX. 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 |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+---------------------------------------------------
       COD  |     .3     .9    1.0     -14    -10     -8    -.22
       EMR  |    1.7    1.2    3.9      76     -6     43     .59
       ESA  |    5.6    2.2    3.9      71    -23     71     .0 
       GFZ  |     .3    1.3    1.0      17    -12      1    -.10
       GRG  |    2.5    9.1    5.9      27     30    209     .38
       JPL  |    5.7    5.2   12.1      -5    -36     -2     .09
       MIT  |    2.8    3.4    2.9       3      5    -27    -.18
       NGS  |    6.0    -.1    1.9      -1    -64     -7    -.16
       SIO  |    7.9    4.9    7.6      86    -82     16     .21


 9. 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 navigation solution is still based on the SP3 clocks but this will soon
    adopt the clock RINEX files as well.

10. Starting on 27-Feb-2000 (GPS Week 1051-0; MJD 51601) the IGS final products
    are aligned to the IGS reference frame products (station coordinates and
    ERPs as generated by NRCan. For more information see IGSMAIL #2750.
    Because of this  change in alignment Table 2 has been enhanced with one 
    additional line per AC. This additional line shows the X- and Y-rotations 
    which were applied to each of the AC orbits prior to the orbit combination. 
    These rotations are based on the difference between the individual AC ERP 
    estimates and the IGS reference frame ERP product. The total rotation of
    the individual AC orbits w.r.t. the IGS combined orbit is the sum of the
    values in the two lines of Table 2 plus the reference frame rotation.

11. Starting on 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) the absolute antenna
    model is introduced (IGSMAIL #5272). The antenna phase center offsets and
    phase center variations are given in the file:
        ftp://igscb.jpl.nasa.gov/pub/station/general/igs05.atx

    
ORBIT COMBINATION AND EVALUATION STATISTICS:                                    
--------------------------------------------                                    
      
Most combination statistics are with respect to the  combined orbits and
consist of five 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 1.1556.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1556.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 2.1556.[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 3.1556.[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 and final
part, Table 5, is similar to Table 4 and contains daily precise navigation
statistics (tables 5.1556.0-6).

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 1556 summary.                       (Nov 01, 2009 - Nov 07, 2009)

Table 1.1556.a   GPS week: 1556   MJD: 55136.000-55142.000

         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  232|    0     0     0    78    -6    -3  -.19    8    7 |    -247    -229     25     72
        |    0     0     1    17    35    32   .02           |     346     865
emr   88|    0    -1     2   -82   -51     0   .55   20   20 |     463     226     37    120
        |    2     1     1    40    55    17   .03           |    2743    1325
esa  127|    0     0     1   -90   -33   -12   .28   10   10 |     607   -1523     22    118
        |    1     0     1    20    40    26   .03           |     966    2023
gfz  192|    0     0    -2   -13   -53    -2  -.17   11   11 |    -214     960     47    146
        |    0     1     2    69   131    12   .04           |     371    2153
grg  107|    0     0     3   -20  -114    -3  1.02   25   24 |     398    -558     73    219
        |    1     1     2    47    34    21   .05           |     384     743
igr  n/a|    0     0     1    49   -42   -41   .01    6    6 |    3828     720     25     78
        |    0     0     0    14    41    25   .02           |    3736    1474
jpl  120|    0    -1     2    71    22    31   .58   20   19 |    1642     404     26     92
        |    2     0     1    21    28    30   .04           |    2885    1347
mit  274|    0     0    -3    30   -36     2  -.27   11   10 |  -14420   -2372     27    117
        |    0     1     0    21    20    17   .03           |    2171    2995
ngs  220|   -1     0     0    34    94     8  -.18   11    9 | -498637  225540   2026   3654
        |    0     1     0    39    84    13   .03           |  312808  152420
sio  258|    0     3     5  -141   125   -15   .05   19   19 |     ---     ---    ---    ---
        |    0     0     1    32    23    25   .06           |     ---     ---


Table 1.1556.b   GPS week : 1556   MJD: 55136.000-55142.000   

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



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
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1556.0   GPS week: 1556   Day: 0   MJD: 55136.000                            

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  232|    0     0     1    83   -76   -43  -.19    8    7 |    -464     535     25     77
        |                    -24    82                       |
emr   88|    0     0     3  -137  -138     7   .62   20   20 |   -2842     -88     20     93
        |                    -22    62                       |
esa  127|    1     0     0   -61    26     1   .32   11   11 |     641   -1885     20    114
        |                    -18   -76                       |
gfz  192|    0     0    -6    20   191    21  -.21   12   12 |    -732    4701     38    138
        |                     21    15                       |
grg  107|    0     0     1    35  -168   -16  1.07   29   27 |     344    -633     81    207
        |                    -60    84                       |
igr  n/a|    0     0     1    56  -127   -15  -.02    7    7 |    -904     343     27     83
        |                    -97    40                       |
jpl  120|    2    -1     2    42   -27    31   .59   22   20 |   -1864      70     19     98
        |                     10    58                       |
mit  274|   -1     0    -2    18    -9    24  -.27   13   13 |  -14513   -2506     27    130
        |                     39   -34                       |
ngs  220|    0     0     0    16   -60     3  -.23   10    9 | -338659   93165   2310   3491
        |                     -3   181                       |
sio  258|    0     4     3  -174   143     4   .14   21   20 |     ---     ---    ---    ---
        |                     43   -86                       |

Table 2.1556.1   GPS week: 1556   Day: 1   MJD: 55137.000                            

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  232|    0     0    -1    42   -15    19  -.19    9    7 |    -446     666     29     71
        |                     10    11                       |
emr   88|    3    -2     2  -134  -102   -19   .56   20   20 |   -1821     -32     24     77
        |                    -19    60                       |
esa  127|    0    -1     4   -93    11   -61   .26   11   11 |     851   -2106     22    120
        |                     -4   -43                       |
gfz  192|    0     1    -3   104    26     5  -.20   11   11 |    -519     761     44    150
        |                     42    17                       |
grg  107|   -1    -1     0  -107  -126    11  1.04   26   24 |     564    -751     77    236
        |                     91    51                       |
igr  n/a|    0     0     1    25   -33   -80   .02    6    5 |     547     545     25     68
        |                    -29     0                       |
jpl  120|    1    -2     2    40    16    64   .54   19   19 |    -821     177     21     82
        |                    -28    43                       |
mit  274|   -1    -1    -4    64   -64    12  -.26   14   12 |  -15226   -1276     29    109
        |                     24   -14                       |
ngs  220|    0     0     0   -37    31    -6  -.15   11    9 |    7293   11775   1991   3525
        |                     50    47                       |
sio  258|    0     3     3   -82    85     6   .08   21   20 |     ---     ---    ---    ---
        |                      9   -73                       |

Table 2.1556.2   GPS week: 1556   Day: 2   MJD: 55138.000                            

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  232|    1     0    -1    88   -11   -20  -.20   10    8 |    -195    -656     29     73
        |                    -22     2                       |
emr   88|    0    -1     1   -71   -50   -19   .52   18   18 |   -2073    1214     20     84
        |                    -53    17                       |
esa  127|    1    -1     2   -67   -36    17   .23   10   10 |    -110     102     21    114
        |                    -20    29                       |
gfz  192|    1     0     0   -51   -76    -2  -.17   11   11 |    -390     606     40    124
        |                     52   -23                       |
grg  107|    0     0     7   -16   -88   -32   .99   25   24 |      77    -809     73    219
        |                    -15    24                       |
igr  n/a|   -1     0     1    60   -41   -68   .03    6    5 |     965    1738     23     65
        |                    -66    27                       |
jpl  120|    0    -1     5    85    11    78   .56   18   18 |    -808    1312     18     81
        |                    -39    70                       |
mit  274|   -1     0    -5    12   -40    -6  -.28   11   10 |   -9880   -7737     20     97
        |                     25   -18                       |
ngs  220|   -2     2     0    53   115     7  -.19   11    9 | -535298  315393   1919   3637
        |                     38    41                       |
sio  258|    0     2     3  -146   114   -22   .07   19   21 |     ---     ---    ---    ---
        |                     28   -90                       |

Table 2.1556.3   GPS week: 1556   Day: 3   MJD: 55139.000                            

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  232|    1     1     0    78    13    -7  -.17    7    7 |    -239    -251     25     82
        |                    -10     0                       |
emr   88|   -2    -3     4   -40     0     0   .54   20   20 |     703    1869     55    180
        |                    -91   -28                       |
esa  127|    0     0     0  -110   -71   -13   .27   11   11 |     445   -1351     26    123
        |                     39    40                       |
gfz  192|    0     1    -3   -13  -139    -9  -.14   11   11 |    -215    2862     67    174
        |                    -23    -6                       |
grg  107|    0     0     4   -51  -104   -17   .94   26   23 |     -70     515     74    227
        |                    -28    63                       |
igr  n/a|    0     0     0    49   -23   -13   .03    5    5 |    3954    2598     28     75
        |                    -64   -13                       |
jpl  120|    1    -2     4    78    14   -11   .65   20   19 |    1793    2063     23     85
        |                   -100    -9                       |
mit  274|    0     0    -3     9   -12    14  -.25    9    8 |  -14798   -1287     32    139
        |                     17   -11                       |
ngs  220|    0    -1     0    42   123    17  -.15   12    9 | -539440  314826   2548   4074
        |                    -13    34                       |
sio  258|    0     3     6  -170   143    -4   .08   18   19 |     ---     ---    ---    ---
        |                     35   -88                       |

Table 2.1556.4   GPS week: 1556   Day: 4   MJD: 55140.000                            

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  232|    0     0    -1    86    26    44  -.15    7    7 |    -691     391     30     78
        |                     -5   -14                       |
emr   88|   -1    -2     3   -58    -1    13   .56   19   19 |    2095    1071     67    171
        |                    -55   -16                       |
esa  127|    0    -1     2  -116   -35   -22   .28   10   10 |    -220     737     27    123
        |                     59    56                       |
gfz  192|   -1     1    -2   -70  -183   -14  -.21   10   10 |     -41    -469     72    185
        |                     -4   -29                       |
grg  107|   -1    -1     0   -10   -68   -10  1.02   24   23 |     971   -1883     70    212
        |                    -48   -19                       |
igr  n/a|    0     0     1    64     3   -25   .03    6    6 |    5891    1745     27     93
        |                    -52   -34                       |
jpl  120|    0     0     2    70    40    19   .61   20   19 |    3110    1429     44    105
        |                    -40   -19                       |
mit  274|    0     0    -3    33   -56   -11  -.24    9    8 |  -14020   -4814     29    106
        |                     13    15                       |
ngs  220|    0     0     0    79   193     0  -.19   12    9 | -865805  368878   1513   3074
        |                    -56   -92                       |
sio  258|    1     3     6  -135   112   -46   .03   18   18 |     ---     ---    ---    ---
        |                      9   -74                       |

Table 2.1556.5   GPS week: 1556   Day: 5   MJD: 55141.000                            

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  232|    0     0     0    94    24   -37  -.19    8    8 |     393   -1800     22     61
        |                    -15   -18                       |
emr   88|    1    -1     0   -42     3    29   .54   20   20 |    3211    -278     54    126
        |                    -73     7                       |
esa  127|    1     0     1   -84   -81   -19   .28    8    8 |      40    -684     25    123
        |                     41    77                       |
gfz  192|    0     0    -1  -100  -165   -13  -.13   12   12 |     378   -1682     45    138
        |                     33   -40                       |
grg  107|    1     0     3    22   -98    23  1.07   24   23 |     136    -264     68    220
        |                    -37   -17                       |
igr  n/a|    0     0     1    59   -22   -50  -.01    5    5 |    7718     -66     25     89
        |                    -31     8                       |
jpl  120|   -1     0     2    93    63    17   .53   21   20 |    4661    -236     40    112
        |                    -31   -19                       |
mit  274|    0     1    -3    24   -38    12  -.29    9    9 |  -16246     282     31    116
        |                     14     1                       |
ngs  220|    0     0     0    69   154    32  -.14   11    7 | -341660   97191   1981   4022
        |                    -92   -94                       |
sio  258|    0     3     5  -162   128     5  -.03   18   16 |     ---     ---    ---    ---
        |                     19   -72                       |

Table 2.1556.6   GPS week: 1556   Day: 6   MJD: 55142.000                            

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  232|    0     0     0    76    -7    18  -.22    8    8 |     -92    -493     16     62
        |                     24   -10                       |
emr   88|    0     0     0   -91   -73    -2   .53   19   19 |    3973   -2170     23    113
        |                    -33    35                       |
esa  127|    3     0    -1   -97   -48     9   .32    8    8 |    2608   -5474     19    112
        |                     14     8                       |
gfz  192|    1     0     0    19   -26    -2  -.12   12   12 |      19     -55     28    113
        |                     11    11                       |
grg  107|    0     1     6   -15  -147    18  1.01   25   23 |     769     -87     68    212
        |                     27    68                       |
igr  n/a|    0     0     1    32   -56   -36   .00    5    5 |    8625   -1858     20     75
        |                    -52    22                       |
jpl  120|   -3    -2     1    88    36    20   .58   21   20 |    5424   -1982     18     84
        |                    -23    32                       |
mit  274|    0     1    -2    53   -31   -24  -.33   11    9 |  -16257     733     25    127
        |                      6     3                       |
ngs  220|   -2    -1     0    14   103     6  -.21   12   11 | -876890  377554   1924   3759
        |                     29    12                       |
sio  258|    1     3     7  -122   150   -52  -.03   20   20 |     ---     ---    ---    ---
        |                      5   -76                       |

       
       
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 3.1556.0   GPS week: 1556   Day: 0   MJD: 55136.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   22  ---  ---   27  ---   23  ---   12   23  ---   13 |    29  ---  ---   27  ---   51  ---   39   52  ---    35
   2E |    7   24   13   14   27    7   26   11   12   28    6 |    46   51   49   49   56   47   48   47   48   43    45
   3  |    5   15   10   10   15    8   11   10   12   16    4 |    28   32   37   36   35   30   32   32   21   32    29
   4E |   12   19   10   17   33    7   22   20    9   24    6 |   106  108  101  109  113  104  116   98  104   98   104
   5  |    7   19   10   15   35    7   26   10   10   17    5 |    22   35   27   24   51   23   34   23   22   19    21
   6  |    5   16    9    8   15    7   11   10    9   15    3 |    31   36   39   36   39   33   36   36   27   33    33
   7E |    9   26    8   10   24    6   25   16    8   16    5 |    19   29   23   19   32   23   27   23   19   23    18
   8E |   12   21   13   12   43    6   17   17   12   28    6 |    46   36   30   35   31   59   24   37   34   21    43
   9E |   10   19    7   15   38    7   21   15   21   14    5 |    37   47   44   41   68   39   50   45   31   49    40
  10  |    9   13   10    7   22    7   12   10    9   19    4 |    18   26   25   19   35   21   23   24   21   18    19
  11  |    8   16   11    9   25    8   17   14    7   19    4 |    28   32   31   24   38   30   31   31   26   36    27
  12  |    8   19    8   10   31    5   24   19   10   29    5 |    36   43   40   37   41   38   43   35   37   33    36
  13  |    6   21   11   11   33    4   23   11    8   11    4 |    22   31   25   27   41   26   30   20   22   20    21
  14  |    8   19   13   13   34    7   24   14    9   16    5 |    23   34   29   27   34   27   29   28   21   27    24
  15  |   10   20   11   10   27    6   22   15    8   20    5 |    24   34   30   29   36   27   29   26   23   21    24
  16  |    8   22   12   11   27    9   23   21    8   26    5 |    24   37   32   31   37   28   33   34   25   29    26
  17  |    7   17   13   14   27    7   20   12   10   28    5 |    25   36   33   26   40   27   33   23   22   27    24
  18  |    7   24    9   10   35    8   23    8    8   16    4 |    24   39   24   23   49   25   34   23   24   24    22
  19  |    5   23   10   11   21    7   20   14    9   25    5 |    27   42   34   25   43   31   38   33   26   30    29
  20  |    5   22   13    8   32    9   21   10    7   15    4 |    23   35   26   20   40   25   32   24   21   24    22
  21E |   13   16    9   11   44    8   19   11   11   10    4 |    37   35   29   36   47   32   32   35   28   29    31
  22  |    5   21   14   11   29    6   25   14   10   18    5 |    21   37   29   22   46   24   31   23   20   23    21
  23  |    7   26   11   17   29    5   25    8    8   16    5 |    23   35   28   32   35   28   31   23   26   23    24
 X24E |   19   30   37   19  ---   20  ---   31  169  ---   13 |    75   74   58   78  ---   72  ---   80  116  ---    75
  26  |    6   15   10    8   25    6   14   11    8   18    4 |    21   28   23   18   25   23   20   24   17   29    20
  27E |   13   20    9   11   20    6   20   14   17   17    5 |    41   48   47   46   52   44   48   46   45   46    43
  28  |    7   15   11    9   29    7   25   12    9   34    5 |    32   38   39   38   39   35   34   33   28   37    33
  29  |    7   18   12   11   32    9   24   13   11   29    5 |    27   31   26   28   37   27   33   29   27   24    25
 X30  |    7   15    8    7   27    5  ---   12    8   20    4 |    30   35   35   37   38   35  ---   43   35   29    33
  31E |    7   21   14   14   20    7   26   15   11   18    5 |    19   32   27   23   32   22   29   18   20   19    19
  32  |    8   20   15    9   19    8   22   10    9   22    5 |    48   52   52   43   51   52   49   53   45   50    47
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   20   11   12   29    7   22   13   10   21      |T   32   40   35   34   43   35   36   35   33   31    32
 WRMS |    7   20   11   12   27    7   20   13    9   20      |NE  26   35   31   28   39   30   32   29   26   28    27
 MEDI |    7   19   11   11   27    7   22   12    9   18      |MD  27   35   30   29   39   30   32   32   26   29    27

Table 3.1556.1   GPS week: 1556   Day: 1   MJD: 55137.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   16  ---  ---   14  ---   19  ---   15   16  ---    9 |    27  ---  ---   25  ---   27  ---   28   29  ---    24
   2E |    9   23   11   12   24    7   20   10    8   24    5 |    39   44   49   45   49   42   43   45   45   39    41
   3  |    5   13    8   10   17    4   13    9   10   15    3 |    19   24   24   21   27   19   25   20   17   23    19
   4E |   16   22   17   13   20    8   18   29   12   35    7 |    86   89   91   79   90   81   86   69   83   70    82
   5  |    7   23   13   15   28    7   23   11   11   19    5 |    18   37   29   25   47   21   32   22   22   21    22
   6  |    6   14    8   10   16    4   15   12   12   14    4 |    22   28   24   20   32   20   27   26   19   23    20
   7E |    9   23   10   11   19    5   22   14    7   15    5 |    19   29   22   18   32   19   25   23   21   27    20
   8E |   14   23   11   11   31    8   17   16   14   30    6 |    37   32   29   32   26   48   24   38   37   22    36
   9E |   12   20   11   13   26    9   19   13   22   16    6 |    32   42   40   39   52   36   43   43   33   42    36
  10  |    8   13    9   10   16    6   11   11   10   19    4 |    14   26   22   21   26   16   20   19   18   16    16
  11  |    7   15   11    7   29    4   14   12   11   16    4 |    23   32   35   28   38   29   27   28   29   32    27
  12  |    7   17    9   10   41    7   19   10    9   28    4 |    23   28   27   27   40   24   27   23   23   23    22
  13  |    8   22    7    8   26    5   20   10    7   15    4 |    20   31   26   21   40   23   29   22   20   19    20
  14  |    7   17   11   12   29    5   24   12    6   13    4 |    13   28   24   22   33   18   26   19   17   20    18
  15  |    5   22   10   11   26    7   22   14   11   18    5 |    20   32   28   25   35   24   29   27   23   26    23
  16  |    7   20   10   11   24    4   24   22   11   26    6 |    17   31   24   20   31   20   31   25   19   21    17
  17  |    9   16   13   10   34    7   16   12   12   26    5 |    14   24   22   13   35   18   21   16   20   15    15
  18  |    6   22   10   12   26    5   24    9    6   13    4 |    23   35   26   20   36   23   32   22   23   24    22
  19  |    8   19    7    9   26    4   21   11    8   23    4 |    19   31   24   21   36   20   32   18   21   20    20
  20  |    7   22   15    7   28    5   17    9    9   14    4 |    21   33   35   20   42   27   27   26   28   26    25
  21E |   11   19   17   17   33    5   17    9    8   10    5 |    29   37   38   39   41   33   32   35   36   33    32
  22  |    4   18    9   14   28    5   20   13    8   14    4 |    15   29   20   16   37   15   25   16   16   19    16
  23  |    6   28   15    9   24    4   25    9   10   17    5 |    27   42   36   27   44   31   37   29   28   28    29
 X24E |   29   32   29   26  ---   27  ---   42   32  ---   14 |    76   75   67   90  ---   79  ---   87  107  ---    80
 X25E |    4  ---  ---  ---  --- >>>>  ---  ---  ---  ---    0 |    19  ---  ---  ---  --- 9999  ---  ---  ---  ---    20
  26  |    6   14   11    8   18    5   13    8    7   18    4 |    15   24   22   17   27   17   19   19   16   24    16
  27E |   15   22   11   12   29    8   21   13   18   20    6 |    33   40   36   39   45   37   37   36   40   35    35
  28  |    7   19   11   12   23    5   20   14   11   35    5 |    21   31   28   29   31   24   26   22   23   26    22
  29  |    6   18   10   12   30    7   21   13   11   30    5 |    20   26   20   25   30   22   27   22   25   21    20
 X30  |    7   14    9   12   32    9  ---   14   11  ---    5 |    21   25   26   27   33   22  ---   28   25  ---    23
  31E |    7   20   11   11   16    7   22   16   10   17    5 |    16   29   23   14   29   18   26   15   14   15    15
  32  |   18   24   16   11   27    7   17   18   12   23    6 |    96  103  101  104   91  101  103  103  104  103   101
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20   11   11   26    6   19   14   11   21      |T   27   37   33   31   39   30   33   31   31   29    29
 WRMS |    7   20   11   11   24    5   19   12    9   20      |NE  23   33   29   26   37   25   31   26   25   26    24
 MEDI |    7   20   11   11   26    6   20   12   11   18      |MD  21   31   26   25   36   23   27   25   23   23    22

Table 3.1556.2   GPS week: 1556   Day: 2   MJD: 55138.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   24  ---  ---   33  ---   43  ---   15   34  ---   15 |    28  ---  ---   34  ---   57  ---   26   51  ---    27
   2  |   17   22   10   12   20    6   17   11   13   22    5 |    94   95   97   98  101   92   98   96   97   88    95
   3  |    7   12    7    8   21    4   11    8    9   12    3 |    20   24   26   24   30   20   27   22   19   23    20
   4E |   13   19   18   16   23    6   16   15   12   23    6 |   101  108  102  106  107  101  111  103  104  100   103
   5  |    9   23   11   11   26    7   23   12   10   23    5 |    17   32   21   18   43   14   32   15   23   16    16
   6  |    7   11    6    8   21    3   12    8    9   12    3 |    25   26   26   26   30   23   28   27   24   23    23
   7E |    7   19   11   10   18    5   24   14    8   13    5 |    14   21   18   19   31   13   25   14   19   12    13
   8E |   14   16   17   13   30    9   16   17   18   31    6 |    29   28   31   32   32   44   24   36   40   16    29
   9E |   11   18   11   11   17    6   19   11   19   12    5 |    32   39   41   37   46   33   43   38   32   41    36
  10  |    6   11    7    6   12    5    9   10   10   19    3 |    14   22   18   16   25   13   23   17   22   15    15
  11  |   10   16    9   11   30    4   15   10   12   16    4 |    14   25   23   22   39   18   24   17   21   20    17
  12  |    7   18    7   15   28    5   20    8   10   27    5 |    21   29   26   26   34   22   30   22   25   21    22
  13  |    6   19    8   10   26    5   17   10    7   12    4 |    15   28   20   23   40   17   28   18   21   14    17
  14  |    7   17   11   14   32    5   21    9   10   15    4 |    14   24   26   27   31   19   27   20   22   21    20
  15  |    6   20   10    9   21    7   23   11   10   16    4 |    18   28   25   24   35   18   30   21   21   22    20
  16  |   10   24   10   12   27    7   24   16   10   24    5 |    18   31   22   21   33   18   31   24   21   21    18
  17  |    7   13    8   14   33    4   15   10   11   23    4 |    13   21   16   14   33   12   23   13   19   16    11
  18  |    8   20   10   12   25    5   20    7    9   14    4 |    16   28   19   17   34   16   29   18   22   23    17
  19  |    6   17    9    8   24    4   19    9    8   24    4 |    17   33   26   21   41   21   36   19   19   20    21
  20  |    6   19    8   11   25    6   16    8   10   12    4 |    17   29   25   17   39   19   26   18   22   19    18
  21E |   10   18    9   10   29    6   14    9   12   10    4 |    26   29   25   26   31   23   31   27   28   29    25
  22  |    5   17    8   13   30    4   19   10    9   12    4 |    14   23   18   17   34   15   24   16   19   16    14
  23  |    7   27   13   14   23    5   23    8    8   15    5 |    18   34   29   27   38   22   32   18   24   20    21
 X24E |   36   34   24   31  ---   19  ---   28   17  ---   13 |    70   61   70   63  ---   58  ---   65   68  ---    58
 X25E |   22  ---   17  ---  ---   31  ---   21   24  ---   12 |    31  --- 9999  ---  --- 9999  --- 9999 9999  ---    33
  26  |    7   12   11   10   19    4   12    7   11   15    4 |    14   19   23   20   23   15   20   17   20   21    16
  27E |   15   22   11   10   24    5   20   11   20   16    6 |    22   29   28   25   28   25   29   24   32   26    24
  28  |    9   22   10   16   24    6   18   11    8   31    5 |    22   29   26   29   29   19   24   24   23   25    22
  29  |    7   15    8   10   33    8   19    8   12   28    5 |    17   19   12   14   29   14   25   15   19   18    13
 X30  |    8   15   10   12   23    9  ---   16   11  ---    5 |    20   24   23   26   24   21  ---   30   28  ---    23
  31E |    6   18    8   12   14    4   22   11    8   15    4 |    14   24   18   16   25   13   26   15   18   14    13
  32  |   20   21    9   10   11    7   16   13    7   21    5 |    45   54   57   56   53   52   50   58   48   57    51
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   18   10   11   25    6   18   11   11   19      |T   26   33   31   30   38   27   34   28   31   27    27
 WRMS |    8   18   10   11   24    5   18   10    9   21      |NE  18   27   24   23   34   21   28   21   24   21    20
 MEDI |    7   18   10   11   24    5   18   10   10   16      |MD  18   28   25   24   33   19   28   21   22   21    20

Table 3.1556.3   GPS week: 1556   Day: 3   MJD: 55139.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   21  ---  ---  ---  ---   40  ---   17   44  ---   18 |    28  ---  ---  ---  ---   50  ---   26   57  ---    28
   2  |    5   24   11   11   24    4   22   12    8   19    5 |    39   41   42   43   48   38   42   38   40   34    38
   3  |    6   13   10    8   15    5   10    7    9   13    3 |    22   21   26   27   25   21   24   22   20   22    21
   4  |   10   15    8   12   18    8   16   10   12   18    4 |    53   55   50   52   59   52   63   57   59   54    54
   5  |    8   23   13   14   31    4   25    7   10   21    5 |    14   31   18   18   45   13   30   16   18   15    14
   6  |    4   15    9   10   18    5   10    6   13   11    3 |    24   26   30   30   28   26   29   27   26   22    25
   7E |    7   21    9   14   34    5   25   10    8   15    4 |    18   22   18   22   34   16   24   19   20   23    16
  X8E |   14   20   18   15   34    5  ---   21   19   34    8 |    36   29   25   32   24   43  ---   38   36   21    34
   9E |   11   19   13   11   23    8   19    9   21   11    5 |    29   44   37   34   55   34   43   37   30   38    34
  10  |    7   10    8    8   17    5   14    8   10   16    3 |    11   18   16   15   27   13   20   18   21   15    14
  11  |    8   21   11    9   27    5   17    8   13   13    4 |    22   29   26   23   34   22   26   23   23   24    21
  12  |    7   20   13   12   25    5   22    9   17   24    5 |    23   34   31   28   35   27   33   27   29   26    26
  13  |    6   20    8    9   30    4   20    9    9   14    4 |    16   27   17   22   39   16   26   15   19   14    15
  14  |    7   20   12   11   35    5   21    7   10   16    4 |    18   31   23   24   33   17   30   21   23   20    20
  15  |    7   22    8    8   24    8   23    9   10   20    4 |    17   31   21   23   35   20   27   19   23   18    18
  16  |    8   25   12    8   28    5   25   15   10   24    5 |    19   34   20   22   32   19   31   24   24   19    19
  17  |    7   17   11   11   28    5   17    7   11   20    4 |    17   27   21   20   30   17   26   16   18   19    16
  18  |    9   25   12   14   26    3   23    6   12   15    5 |    24   31   19   16   35   20   30   20   26   20    20
  19  |    5   21    9    8   23    5   19    8   10   23    4 |    21   34   25   24   38   22   35   21   23   24    22
  20  |    7   25    8    8   29    7   21    5   12   11    4 |    15   33   18   21   39   18   28   17   23   19    18
  21E |   10   18    8    9   22    6   14   10   12   13    4 |    48   50   49   48   51   50   47   52   51   47    48
  22  |    5   19   12   12   30    4   22    6   11   13    4 |    16   25   19   15   36   16   25   17   24   15    15
  23  |    7   29   14   14   26    5   26    6    9   17    5 |    21   35   29   30   37   24   33   22   24   22    22
 X24E |   55   45  ---   35  ---   28  ---   48   29  ---   23 |   112   83  ---   82  ---   84  ---  101   95  ---    88
 X25E |   12  ---   31  ---  ---   15  ---   14   24  ---   11 |    34  --- 9999  ---  --- 9999  --- 9999 9999  ---    31
  26  |    5   14   10    8   17    4   11    5    7   21    3 |    16   25   20   15   23   16   20   18   20   17    16
  27E |   14   27   12   14   30    8   23    9   25   12    6 |    22   30   25   27   33   26   29   23   37   22    23
  28  |    9   19   14   11   30    4   27   10   12   31    6 |    23   28   27   27   37   22   31   27   26   31    23
  29  |    5   19    8    9   34    6   19    5   17   29    5 |    21   27   21   21   31   21   25   19   26   21    19
  30  |    5   12    9   10   19    3   11   10   10   15    3 |    23   21   21   27   23   23   17   28   26   21    22
  31E |    5   24    9   11   17    4   25   12   12   17    5 |    15   28   18   10   25   14   24   16   19   14    13
  32  |    7   21   10    9   13    6   20   10   10   22    4 |    74   71   67   74   72   72   73   75   75   79    72
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   20   11   11   26    5   20    9   12   18      |T   27   34   26   29   36   28   31   29   31   25    27
 WRMS |    7   20   11   11   23    5   19    8    9   19      |NE  22   30   24   24   34   23   29   23   27   23    22
 MEDI |    7   20   10   11   26    5   20    9   11   17      |MD  22   30   23   24   35   22   29   22   24   21    21

Table 3.1556.4   GPS week: 1556   Day: 4   MJD: 55140.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   14  ---  ---  ---  ---   23  ---   16   18  ---   11 |    23  ---  ---  ---  ---   31  ---   25   32  ---    23
   2  |    6   19   14    9   26    4   18   18   12   20    5 |    44   52   48   47   61   48   52   51   48   44    47
   3  |    5   11    8    9   13    4    9    7   12   13    3 |    24   25   31   25   32   24   31   26   23   28    25
   4  |   10   18    8   10   18    6   17    9   12   20    4 |    58   65   57   59   67   56   65   55   59   60    58
   5  |    8   26   11   13   30    5   24    6   10   21    5 |    21   39   28   24   49   21   38   21   28   21    24
   6  |    4   11    6    8   15    5    9    6   10   11    3 |    26   28   32   25   34   28   34   29   27   27    27
   7E |    6   17    7   11   20    4   24    8   10   11    4 |    20   23   20   26   31   19   26   22   24   26    20
  X8E |   22   42   28   21   40   18  ---   35   42  ---   14 |    30   35   40   32   33   47  ---   49   52  ---    29
   9E |   13   19   14   13   16    6   21   10   20   11    5 |    28   38   41   35   46   31   41   35   26   36    33
  10  |    8   11    9    8   16    6   15    9   10   15    3 |    19   28   26   22   33   19   29   23   26   22    22
  11  |    6   15    9    9   30    5   17    5    8   12    3 |    17   21   23   22   36   17   25   19   19   20    17
  12  |    6   19   10    9   26    7   24    9   10   24    5 |    21   32   32   32   34   25   33   24   28   27    26
  13  |    5   21    7   13   27    4   20    7    8   15    4 |    18   29   20   26   39   20   28   21   26   23    20
  14  |    5   21    8   10   33    7   22   10    8   14    4 |    23   32   29   27   39   23   32   29   28   27    26
  15  |    7   23   11   12   26    7   27    7    9   19    5 |    21   34   23   25   39   23   35   23   25   21    23
  16  |    8   23   10    9   27    6   23   12   12   24    5 |    22   34   31   26   33   25   37   27   23   24    25
  17  |    6   15    9   10   29    7   15    8   16   20    4 |    18   28   24   22   34   21   27   21   29   25    21
  18  |    7   25   13   11   28    5   23    8    7   16    5 |    28   38   30   20   41   28   37   27   32   26    27
  19  |    5   18    9    7   24    5   20    9   12   25    4 |    20   34   27   24   41   23   37   22   25   26    23
  20  |    5   22    7    8   29    6   20    5   14   11    4 |    18   31   21   19   41   19   28   20   23   22    19
  21  |    9   18   10    6   25    7   14    9   12    7    4 |    40   40   43   36   47   41   41   38   46   36    39
  22  |    4   20   10   10   26    5   20    5    7   13    4 |    24   33   28   22   40   25   33   25   28   24    25
  23  |    6   29   13   12   25    5   24    6    9   18    5 |    20   35   25   27   33   21   32   23   25   23    22
 X24E |   41   34  ---   33  ---   21  ---   29  169  ---   20 |   112  140  ---  133  ---  128  ---  144  209  ---   126
 X25E |   15   28   29   25  ---    9  ---   16   41  ---   11 |    31   28 9999   37  --- 9999  --- 9999 9999  ---    32
  26  |    6   12    9    8   18    5    9    8    8   16    3 |    21   29   27   23   30   22   27   26   26   24    24
  27E |   14   27   10   12   19    7   25   11   28   12    6 |    29   35   36   35   38   33   33   34   49   32    32
  28  |    8   18   10   11   25    7   24   10   17   33    5 |    25   27   26   30   31   22   29   26   28   29    24
  29  |    6   18    8    8   31    6   20    6    9   28    4 |    20   27   21   21   30   21   28   23   22   25    20
  30  |    5   13    9    8   21    6   12    7    7   13    3 |    24   23   22   28   28   23   20   27   28   22    24
  31E |    3   20   11    9   22    6   21   10   13   12    4 |    19   30   25   21   33   21   32   21   29   23    22
  32  |    8   21   11   10   12    5   19    9   10   19    4 |    32   30   26   29   29   28   36   30   32   29    28
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19   10   10   24    6   20    9   12   18      |T   28   36   29   31   38   30   33   31   36   27    29
 WRMS |    7   19   10   10   23    6   19    8    9   18      |NE  22   30   26   24   35   23   31   24   26   24    23
 MEDI |    6   19   10   10   25    6   20    9   10   15      |MD  23   32   27   26   34   23   32   26   28   25    24

Table 3.1556.5   GPS week: 1556   Day: 5   MJD: 55141.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   18  ---  ---  ---  ---   22  ---   16   21  ---   13 |    23  ---  ---  ---  ---   33  ---   23   36  ---    23
   2  |    7   24    6   11   20    4   22   13    7   23    5 |    30   38   36   37   43   34   37   39   38   33    34
   3  |    8   12    6    6   15    5   11    8   11   14    3 |    19   27   21   15   25   18   26   15   17   22    18
   4  |    8   18    8   11   11    5   14    8    8   20    4 |    34   43   34   41   41   38   41   33   41   37    35
   5  |    8   24    9   14   29    5   25   11    6   20    5 |    14   32   21   20   48   16   31   19   15   16    17
  X6  |   10   12    6  ---   17    6   11    7   10   12    3 |    23   28   22  ---   29   20   29   21   20   21    21
   7E |    6   19    8   10   24    5   21    8    8   12    4 |    15   21   17   14   32   13   24   12   17   14    13
  X8E |    7  ---  ---  ---  ---  285  ---  ---  ---  ---    0 |    34  ---  ---  ---  ---  169  ---  ---  ---  ---    32
   9E |   11   21   10   15   14    8   22   13   21   15    5 |    35   42   44   42   43   35   42   43   31   41    38
  10  |    9   14    6   11   16    4   14   10   10   15    4 |    16   25   18   17   32   17   25   21   21   19    17
  11  |    8   17    9   11   29    4   20    7   11   12    4 |    18   26   17   20   37   16   25   16   17   16    14
  12  |    7   19    7   11   25    5   26   11    7   24    5 |    21   29   22   25   32   22   30   21   25   24    21
  13  |    6   21    6   12   26    5   22    5    7   16    4 |    16   28   17   24   37   18   29   17   19   18    16
  14  |    8   16    9   14   32    6   21    8    7   11    4 |    20   28   26   21   30   20   27   23   24   20    22
  15  |    8   24    7   11   26    5   24    8    7   19    4 |    18   29   20   25   39   18   29   17   17   19    17
  16  |    8   21   11    9   25    6   22   10   10   24    5 |    17   32   20   19   32   18   31   18   18   18    18
  17  |    9   16   12   15   34    8   18   15   12   22    5 |    14   23   14   22   35   15   24   18   20   17    14
  18  |    8   24    9   13   24    4   25    7    7   15    4 |    20   32   20   15   33   18   32   19   19   21    18
  19  |    8   17    6    5   23    5   19    9   11   24    4 |    22   33   25   21   36   21   34   15   19   21    20
  20  |    5   19    7   12   26    5   20    6    7   11    4 |    14   25   17   22   36   15   23   14   16   13    14
  21  |    7   18    5    8   32    5   14    8    6    9    3 |    28   32   26   24   42   25   30   24   20   26    24
  22  |    5   18    8   10   24    5   19    6    6   11    3 |    19   27   24   14   35   19   27   19   20   19    19
  23  |    7   26    9   17   27    5   24    8   10   16    5 |    19   34   24   30   35   23   31   20   24   22    21
 X24  |   19   29   15   23  ---   29  ---   21  157  ---   10 |    55   61   64   70  ---   60  ---   65   83  ---    60
 X25E |   11   19   15   13  ---    6  ---   15   22  ---    7 |    26   22 9999   22  --- 9999  --- 9999 9999  ---    22
  26  |    7   12    8   10   17    5   11    8    5   13    3 |    17   23   21   12   21   16   20   19   18   15    18
  27E |   13   28    8   12   18    5   25   11   32   14    7 |    37   42   41   43   40   42   38   39   56   39    40
  28  |   10   17    9   10   27    5   24   12    8   32    5 |    23   26   21   24   34   21   29   25   22   23    20
  29  |    7   18    5   12   35    4   21   12    9   29    5 |    15   20   13   15   28   13   22   19   15   17    13
  30  |    6   14    9    7   19    5   13    8    6   15    3 |    19   19   22   22   22   19   16   20   21   19    18
  31E |    6   18    7   10   15    7   23    9   11   12    4 |    14   26   18   15   26   16   25   17   18   13    15
  32  |    9   21   10   20   14    7   21    7    9   19    5 |    49   49   46   55   49   48   50   50   50   51    48
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   20    8   12   24    5   21    9   11   18      |T   23   30   25   25   34   28   29   24   25   22    23
 WRMS |    8   20    8   12   23    5   20    9    7   16      |NE  19   28   21   21   33   20   28   20   21   20    19
 MEDI |    8   18    8   11   24    5   21    8    9   15      |MD  19   28   21   22   35   19   29   19   20   19    19

Table 3.1556.6   GPS week: 1556   Day: 6   MJD: 55142.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   13  ---  ---  ---  ---   21  ---   18   19  ---   11 |    25  ---  ---  ---  ---   35  ---   29   40  ---    27
   2  |    8   25    8   15   20    6   27   20   12   23    6 |    34   38   36   39   46   35   38   37   34   37    34
   3  |    7   13    9    5   19    2   13    9   10   18    3 |    21   25   27   25   26   20   28   21   19   24    21
   4  |    9   18    6   15   14    3   17    9   15   21    5 |    53   59   56   53   59   53   59   54   51   60    54
   5  |   10   27   10   10   28    5   26   17    8   21    5 |    17   33   22   22   45   17   31   25   18   20    18
   6  |    7   13    9    6   20    4   11    7   10   16    3 |    29   30   33   31   29   27   32   30   25   27    28
   7E |    7   17    7   10   20    6   22   12   11   15    4 |    13   22   19   17   31   16   22   16   16   16    13
  X8E |    5  ---  ---  ---  ---  311  ---  ---  ---  ---    0 |    48  ---  ---  ---  ---   81  ---  ---  ---  ---    46
   9E |   12   22   10   16   16    6   22   13   22   21    6 |    46   53   51   49   61   46   52   52   42   54    48
  10  |    9   13    9   10   15    5   15   17    9   20    4 |    16   21   19   20   28   15   22   23   17   23    16
  11  |    8   13    7   10   30    4   20    6    7   13    3 |    16   23   18   16   37   16   23   14   13   19    14
  12  |    8   21    8   13   27    7   26   12   12   24    5 |    20   29   24   26   35   21   30   26   20   23    21
  13  |    6   21    7   12   27    2   22    5    8   15    4 |    19   30   26   27   40   22   31   21   22   22    21
  14  |    7   19    7   13   26    6   23   11    9   13    4 |    20   29   25   26   31   20   29   25   27   23    23
  15  |    8   25   10   13   25    5   24   10   14   24    5 |    18   29   25   23   35   19   25   16   24   22    19
  16  |    8   23   11    9   27    5   24    9   10   25    5 |    22   34   30   26   34   24   34   24   22   22    24
  17  |   11   16    8   13   41    5   17   17   13   21    5 |    26   29   29   26   40   25   30   29   25   26    24
  18  |    6   25    8   14   24    6   25   10   10   18    5 |    21   35   20   20   38   21   35   22   21   26    20
  19  |    7   15   13    8   26    5   18    8   10   26    4 |    22   33   27   22   39   24   35   20   25   28    23
  20  |    6   17    7   13   22    5   20    9    8   11    4 |    17   27   21   20   37   20   26   16   17   18    17
  21  |    8   19    6    9   45    4   15    7    8   11    3 |    23   28   24   23   41   23   25   25   23   26    22
  22  |    5   22    8   16   25    5   23    8   12   14    4 |    20   30   19   21   38   18   31   19   23   20    19
  23  |    9   22    8   19   22    3   26    6    8   21    5 |    23   37   33   37   42   27   36   27   24   31    27
 X24  |   13   22   18   17  ---   29  ---   21  151  ---    9 |   141  138  128  155  ---  142  ---  150  161  ---   147
 X25E |   12   23   12   13  ---    6   22   15   25  ---    6 |    28   21 9999   21  --- 9999   13 9999 9999  ---    24
  26  |    6   12    7   12   14    4   11    9    6   17    3 |    16   21   20   19   22   16   20   20   18   14    17
  27E |   13   27    9   15   20    6   26   14   33   14    7 |    44   52   44   45   44   46   49   45   52   44    43
  28  |    9   15   10   12   28    6   22   13   12   35    5 |    29   30   34   30   33   27   31   34   27   31    28
  29  |   12   18    5    9   29    4   21   14   11   31    5 |    23   28   23   22   34   21   29   27   23   24    21
  30  |    7   12    5   10   17    6   14    7    6   15    3 |    26   25   26   26   27   24   16   30   25   20    24
  31E |    9   16    7   12   22    6   23   12   10   13    4 |    17   29   22   20   29   20   30   21   24   20    20
  32  |    9   15    8   12   11    4   19    9    9   22    4 |    45   53   54   51   54   51   51   49   48   59    49
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    8   12   25    5   21   11   12   20      |T   29   35   32   31   37   31   31   31   30   27    29
 WRMS |    8   19    8   12   23    5   20    9   11   20      |NE  22   30   26   25   35   23   29   24   23   24    22
 MEDI |    8   18    8   12   22    5   22   10   10   18      |MD  22   29   26   25   37   23   30   25   24   23    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 4.1556   GPS week: 1556   MJD: 55136.0-55142.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3003 |U   11     9    30 |U    8    10    29 |U    8     8    18 |
emr | emr 2855 |    19    14    53 |U   11    11    32 |     8     8    20 |
esa | esa 2893 |    11    12    33 |U    8     9    27 |     8     7    16 |
gfz | gfz 2859 |U   27    25    79 |U   20    28    86 |    22    19    50 |
grg | grg 2756 |    11    10    36 |U   10    11    31 |     8     8    21 |
igr | igr 2884 |    13    13    37 |     9    12    34 |     9    11    21 |
igs | igs 2918 |    12    11    33 |     9    12    32 |     8     9    20 |
jpl | jpl 2689 |    16    17    46 |U   11    11    35 |U    8     8    22 |
mit | mit 3017 |U   11    11    35 |U   18    17    47 |U    9     8    18 |



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 5.1556.0   GPS week: 1556   Day: 0   MJD: 55136.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2944 |    14    11    31 |     7    12    24 |     8     9    17 |
emr | emr 2850 |    20    13    56 |    12    13    25 |     6     6    15 |
esa | esa 2880 |    14    11    34 |     7    10    20 |     8     8    13 |
gfz | gfz 2922 |    26    15    46 |    19    33    43 |    10    11    25 |
grg | grg 2784 |    15    13    37 |     8    11    31 |     9    10    17 |
igr | igr 2939 |    13    12    34 |     8    12    25 |     8     8    16 |
igs | igs 2843 |    17    11    36 |    12    16    27 |     7     6    15 |
jpl | jpl 2671 |    16    14    41 |    14    16    34 |     8     6    22 |
mit | mit 2976 |    14    11    33 |    21    21    42 |    10    11    18 |

Table 5.1556.1   GPS week: 1556   Day: 1   MJD: 55137.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2952 |     8     6    29 |     7     9    28 |     5     4    17 |
emr | emr 2839 |    18     9    30 |    11    10    42 |     8     7    20 |
esa | esa 2880 |     9     8    40 |     6     9    29 |     6     6    19 |
gfz | gfz 2918 |    16    11    48 |    13    16    48 |    12    16    47 |
grg | grg 2784 |    10     9    46 |    10     9    38 |     8    10    28 |
igr | igr 2872 |     9     7    40 |     7    10    31 |     6     6    19 |
igs | igs 2871 |    10    10    47 |     8    11    37 |     5     6    18 |
jpl | jpl 2671 |    10    10    59 |     9     9    43 |    10    10    29 |
mit | mit 2976 |    11    10    31 |    21    17    69 |     5     6    16 |

Table 5.1556.2   GPS week: 1556   Day: 2   MJD: 55138.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3037 |    10    14    20 |     7    11    23 |     7     6    12 |
emr | emr 2846 |    35    15   117 |    11    12    34 |     7     6    19 |
esa | esa 2975 |    10    16    23 |     7     8    25 |     7     6    13 |
gfz | gfz 2916 |    14    11    41 |    30    31   153 |    15    17    52 |
grg | grg 2784 |    10    13    29 |    12    15    42 |     8     6    21 |
igr | igr 2921 |    10    12    29 |     7    11    28 |     8     8    17 |
igs | igs 2956 |    12    14    35 |     9    13    29 |     7     6    17 |
jpl | jpl 2675 |    15    15    48 |     9    11    36 |     8     7    18 |
mit | mit 3072 |    10    10    48 |    18    20    48 |    11    10    23 |

Table 5.1556.3   GPS week: 1556   Day: 3   MJD: 55139.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3002 |     6     8    17 |     7     8    22 |     8     7    16 |
emr | emr 2845 |    12    17    26 |    10    10    25 |    13    11    33 |
esa | esa 2880 |     7    11    15 |     6     7    28 |     9     6    19 |
gfz | gfz 2829 |    69    84   220 |    23    42   137 |    48    36   120 |
grg | grg 2784 |     8     7    22 |     7     7    22 |     9     8    23 |
igr | igr 2847 |     8    13    24 |     6     7    24 |     7     7    13 |
igs | igs 2972 |     8    13    18 |     7     7    27 |     8     6    16 |
jpl | jpl 2679 |    15    31    31 |     7     7    27 |     9     9    21 |
mit | mit 3072 |    12    20    31 |    20    16    51 |    10     7    13 |

Table 5.1556.4   GPS week: 1556   Day: 4   MJD: 55140.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2996 |     8     8    23 |     6    10    29 |     6     7    15 |
emr | emr 2927 |    11    10    48 |     9     9    28 |     7     8    17 |
esa | esa 2880 |     9     9    26 |     6    10    27 |     7     8    19 |
gfz | gfz 2876 |    26    31   100 |    13    16    51 |    22    16    38 |
grg | grg 2784 |     9     6    29 |     6    10    27 |     7     8    20 |
igr | igr 2877 |    12    11    38 |    11    16    38 |    11    19    35 |
igs | igs 2961 |    11     6    23 |     7    11    28 |     9    11    29 |
jpl | jpl 2679 |    33    29    71 |    12    10    27 |     6     7    21 |
mit | mit 3072 |     8     6    45 |     8    13    36 |     8     8    17 |

Table 5.1556.5   GPS week: 1556   Day: 5   MJD: 55141.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3041 |    19     7    53 |     7     7    37 |     9    10    28 |
emr | emr 2848 |    20    15    47 |     9     9    30 |     8    11    22 |
esa | esa 2880 |     9     9    38 |    10     8    32 |     8     8    16 |
gfz | gfz 2728 |    12    13    33 |    30    41    78 |    34    21    47 |
grg | grg 2688 |     9     8    27 |    13    11    33 |     8    10    22 |
igr | igr 2838 |    16    17    45 |    14    16    49 |    13    18    31 |
igs | igs 2917 |    12     8    35 |    11    11    38 |    12    19    29 |
jpl | jpl 2678 |     8     9    36 |    13    11    41 |     9    10    23 |
mit | mit 2976 |     8     7    27 |    23    13    38 |    11    12    25 |

Table 5.1556.6   GPS week: 1556   Day: 6   MJD: 55142.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3053 |    15    11    38 |    13    12    39 |    11    12    22 |
emr | emr 2832 |    18    19    43 |    14    13    42 |     8     8    17 |
esa | esa 2880 |    18    18    53 |    11    12    32 |     9     7    12 |
gfz | gfz 2829 |    26    14    68 |    15    16    92 |    15    14    24 |
grg | grg 2688 |    18    11    60 |    11    12    28 |     8     7    14 |
igr | igr 2895 |    21    16    46 |    13    13    42 |    10     8    20 |
igs | igs 2906 |    17    13    37 |    13    12    41 |    10    11    17 |
jpl | jpl 2772 |    16    11    36 |    11    11    34 |     9     8    18 |
mit | mit 2976 |    15    13    33 |    14    16    44 |     9     6    14 |


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    : 21-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 6.1556   GPS week: 1556   MJD: 55136.500-55142.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      -6       9       6      32      2 |       5     20
            |      24      18     108     108      6 |       2
emr   uuuuu |     -18      53     -92    -204    -10 |      74     77
            |      26      19     101     103     11 |       3
esa   uuuuu |     -11     -12     -73     108     -9 |      14     24
            |      67      39     170      80      9 |       2
gfz   uuuuu |      10     -15      88     -50      5 |      -3     18
            |      16      22      72      80      3 |       3
grg   --xxx |      --      --     -41    -102     10 |      11     20
            |      --      --     229     158     24 |       3
igr   xxxxx |      -5      59     -10     -65      3 |      -4     16
            |      17      26     131     107     10 |       2
irf   xxxxx |       2       3      33      48     -8 |       3     19
            |      13       9      32      15      6 |       2
jpl   uuuuu |     -20      39     -84     -45     -2 |      25     32
            |      27      28     179     135     15 |       2
mit   uuuuu |      10     -16     -36      64     -8 |      21     30
            |      28      10     101     153      9 |       2
ngs   uuuuu |     -16      10     192      33      2 |       3     13
            |      81      45     138     153      6 |       2
sio   uuuuu |      82     -18    -171     -49      1 |      45     50
            |      18      18     126     153      9 |       3


Table 7.1556.0   GPS week: 1556   Day: 0   MJD: 55136.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -58      33    -128     148      9 |       2     12
emr   uuuuu |     -38      31    -177    -306     -2 |      74     75
esa   uuuuu |     100      27     205     213      6 |      11     16
gfz   uuuuu |       9     -12      54    -153      9 |      -9     13
grg   --xxx |      --      --    -543    -320     -8 |       7     18
igr   xxxxx |     -16     106     150    -243     -4 |      -7     13
irf   xxxxx |      24       9      43      72      6 |       0     11
jpl   uuuuu |     -34      -1    -179    -241    -16 |      26     28
mit   uuuuu |      58     -30    -143     272     12 |      17     21
ngs   uuuuu |    -157      12     194     -89     -9 |      -2     10
sio   uuuuu |     110     -34    -305     133     21 |      39     40

Table 7.1556.1   GPS week: 1556   Day: 1   MJD: 55137.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      -5       7    -145     -62     -5 |       7     21
emr   uuuuu |     -54      36    -104    -327    -19 |      79     81
esa   uuuuu |      49      21     -93     115    -10 |      16     25
gfz   uuuuu |     -11     -25      45      -5      1 |      -4     19
grg   --xxx |      --      --      83     -26     19 |       9     22
igr   xxxxx |       6      46     174     -15      9 |      -4     17
irf   xxxxx |       6      17     -36      47    -10 |       5     20
jpl   uuuuu |     -37      45     221    -158    -23 |      29     32
mit   uuuuu |      20      -7    -204     202     -9 |      23     31
ngs   uuuuu |     -41     -33     311     -52     10 |       1     15
sio   uuuuu |      79       8    -351      41      4 |      45     50

Table 7.1556.2   GPS week: 1556   Day: 2   MJD: 55138.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       5      31      96    -128     -5 |       6     22
emr   uuuuu |     -10      62     -87    -269    -27 |      77     80
esa   uuuuu |     -22      29    -227     155     -3 |      16     26
gfz   uuuuu |      30     -43     126     -68      4 |      -4     19
grg   --xxx |      --      --       7    -103     11 |      11     22
igr   xxxxx |     -20      75     -55    -160      0 |      -3     16
irf   xxxxx |       7       9      37      43     -9 |       5     20
jpl   uuuuu |     -63      48      40    -159     -2 |      26     32
mit   uuuuu |      25     -16     -35     160     -9 |      23     31
ngs   uuuuu |     -34     -29     306     -67      1 |       3     14
sio   uuuuu |      97     -19    -210      39      1 |      46     51

Table 7.1556.3   GPS week: 1556   Day: 3   MJD: 55139.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      -3       2      19       1      0 |       3     21
emr   uuuuu |      25      83    -179     -78     -7 |      73     76
esa   uuuuu |     -43     -47    -218      61     -6 |      15     25
gfz   uuuuu |       3      15     175     -75      2 |      -4     19
grg   --xxx |      --      --     -50    -134    -24 |      10     21
igr   xxxxx |      10      56       9     -78      2 |      -5     16
irf   xxxxx |      -3      -8      38      41    -12 |       3     21
jpl   uuuuu |       6      92    -108      66     18 |      23     30
mit   uuuuu |       8     -25       0      60    -10 |      21     31
ngs   uuuuu |     -37       5     328     -99      0 |       2     14
sio   uuuuu |      85     -43    -168      23     -4 |      44     50

Table 7.1556.4   GPS week: 1556   Day: 4   MJD: 55140.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       0       3      45      11      3 |       4     22
emr   uuuuu |       2      53    -172    -121      7 |      72     76
esa   uuuuu |     -70     -61    -146      33     -8 |      15     25
gfz   uuuuu |      15       2     157      83      7 |      -2     20
grg   --xxx |      --      --     118      15     -6 |      12     20
igr   xxxxx |      20      50    -104      48     21 |      -3     16
irf   xxxxx |     -14      -2      41      44    -11 |       3     21
jpl   uuuuu |       5      38     -29      77     11 |      25     32
mit   uuuuu |     -29     -15      55     -67    -15 |      22     31
ngs   uuuuu |      78      54      80     107      0 |       3     15
sio   uuuuu |      60     -11     -78    -169     -4 |      46     51

Table 7.1556.5   GPS week: 1556   Day: 5   MJD: 55141.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       6       8     144     157     -1 |       6     22
emr   uuuuu |     -19      66     -19    -100    -10 |      73     77
esa   uuuuu |     -89     -48    -159      -2    -17 |      13     24
gfz   uuuuu |      28     -40      94      -5      4 |       0     18
grg   --xxx |      --      --      10     129     31 |      15     18
igr   xxxxx |     -20      24    -181      45     -1 |      -1     17
irf   xxxxx |     -12      -7      63      62    -10 |       4     20
jpl   uuuuu |       7      24    -218      67     -6 |      26     34
mit   uuuuu |     -13     -21      62     -35    -15 |      23     31
ngs   uuuuu |      82      85     167     118      7 |       6     13
sio   uuuuu |      60     -26     -20     -98     -7 |      48     53

Table 7.1556.6   GPS week: 1556   Day: 6   MJD: 55142.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      16     -18      11     101      9 |       4     23
emr   uuuuu |     -29      39      93    -226    -10 |      70     74
esa   uuuuu |      -2      -8     125     179    -23 |      10     26
gfz   uuuuu |      -5      -5     -32    -123     10 |      -1     19
grg   --xxx |      --      --      90    -274     44 |      15     19
igr   xxxxx |     -16      58     -63     -54     -9 |      -3     19
irf   xxxxx |       6       6      44      26     -7 |       1     23
jpl   uuuuu |     -26      29    -314      34      5 |      24     33
mit   uuuuu |       3       0      15    -140    -11 |      20     32
ngs   uuuuu |      -6     -23     -44     314      3 |       4     14
sio   uuuuu |      82       1     -65    -313     -3 |      46     52



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