[IGSREPORT-17900] Wk 1551 IGS Final Orbits

Jim Ray IGS.ACC at noaa.gov
Thu Oct 15 05:12:32 PDT 2009


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IGS Electronic Report   15 Oct 05:12:35 PDT 2009      Message Number 17900
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Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1551   (Sep 27, 2009 - Oct 03, 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:

igs1551[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1551[0-6].clk  IGS GPS satellite and station clocks in SP3 format.
igs1551[0-6].cls  IGS GPS clock combination summary report.
igs15517.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs15517.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  |  ESA   | 24 DAV1 SYOG XMIS
                0  |  GFZ   | 1 5 24 DAV1 DUBO HARB MAS1 ONSA PERT WSRT ZIMM
                0  |  GRG   | COCO WTZR
                0  |  MIT   | 24 24 HARB METS SYOG
                0  |  NGS   | 1
                1  |  ALL   | 1
                1  |  COD   | HARB
                1  |  ESA   | 5 24 26 UNSA WTZR
                1  |  GFZ   | 5 24 CHUR HRAO MAS1 METS ULAB YAR2
                1  |  GRG   | ONSA
                1  |  JPL   | 5 32 DGAR
                1  |  MIT   | 5 24 26 5 24 26 AUCK CAS1 HARB PERT
                1  |  NGS   | 24
                2  |  ESA   | KOKB UNSA WTZR
                2  |  GFZ   | 1 5 8 24 ASPA CAS1 DAEJ DARW DUBO FAA1 HARB KOKB
                2  |  GFZ   | MAS1 MBAR MCM4 MIZU NRMD SUTH SYOG THU3 TOW2
                2  |  GRG   | TWTF WTZR
                2  |  JPL   | 5 DARW DGAR MDVJ
                2  |  MIT   | 24 24 DARW ASPA MDVJ TWTF
                2  |  NGS   | 1 24
                3  |  ALL   | 1
                3  |  COD   | WROC WROC
                3  |  EMR   | TWTF WTZR
                3  |  ESA   | 21 CEDU NRC1 UNSA
                3  |  GFZ   | 9 24 BOGT FAA1 HOB2 MIZU NANO QAQ1 SSIA
                3  |  GRG   | TWTF WTZR
                3  |  JPL   | 5 32 DGAR
                3  |  MIT   | 24 24 SANT
                3  |  NGS   | 24
                4  |  ALL   | 1
                4  |  COD   | WHIT
                4  |  EMR   | WTZR WTZR
                4  |  ESA   | 24 CEDU DAEJ UNSA
                4  |  GFZ   | 11 27 CAS1 FAA1 HARB NYA1
                4  |  GRG   | IRKJ KHAJ TWTF WTZR
                4  |  JPL   | 32 DGAR KARR
                4  |  MIT   | 24 24 SHAO
                5  |  COD   | MIZU
                5  |  EMR   | ALGO WTZR
                5  |  ESA   | CEDU UNSA
                5  |  GFZ   | 5 11 CONZ FAA1 TSKB
                5  |  GRG   | IRKJ TLSE TWTF WTZR
                5  |  JPL   | 32 DGAR
                5  |  MIT   | 6 11 18 21 24 6 11 18 21 24
                5  |  NGS   | 1
                6  |  ALL   | 1 1 24
                6  |  EMR   | WTZR
                6  |  ESA   | KOKB UNSA WTZR
                6  |  GFZ   | 3 5 BOGT HARB KIRU MAL2 MBAR MIZU PRE1 REUN RIOP
                6  |  GRG   | COCO POTS SPT0
                6  |  JPL   | 32 DGAR
                6  |  MIT   | FLIN

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets.  Note that only the largest clock offset and drift are output
    to the summary file.  However, the clock combination and the listed RMS
    include all the clock segments.  In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                1  |  GFZ   | ~20:00 | ~ -0.07 ns

 6. The following table lists all maneuvered satellites for this week.
    The solutions from COD and ESA, which modeled the maneuver, are used
    that day for combination. An associated accuracy code of 0 (unknown) 
    is given if only one AC is left (no redundancy). For the long arc  
    evaluation the arc is split into two parts at the given maneuver epoch.
    
               PRN |    Date    | Ref. NANU
               ----+------------+----------
               G04 | 2009_09_29 | 2009076 

 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  |     .1     .8    1.2      -8      1    -17    -.30
       EMR  |   -2.9   -2.8    -.5     164    -28    173    -.19
       ESA  |    4.8    4.2    7.1      95    -29     66    -.13
       GFZ  |     .0     .3    1.5       9      1     26    -.23
       GRG  |    4.2    6.3    1.3      15      9      7     .09
       JPL  |   -4.4    2.1   -6.1      -2    -20    -11     .27
       MIT  |     .0     .0    8.3      11     13    -26    -.29
       NGS  |   -2.1   -1.2    1.9     -15     45     -4    -.24
       SIO  |     .3    4.2   -4.0      76    -15     -4     .01


 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 1.1551.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1551.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 2.1551.[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 3.1551.[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 5.1551.0-6).

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 1551 summary.                       (Sep 27, 2009 - Oct 03, 2009)

Table 1.1551.a   GPS week: 1551   MJD: 55101.000-55107.000

         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  224|    0     1     1    70   -14    -8  -.14    7    7 |     656    -572     16     69
        |    0     0     0    15    18    19   .01           |     661     756
emr   76|   -2    -2     0  -255    47    26   .57   19   19 |    -323    -421     16     74
        |    0     1     1    29    16    17   .05           |    1345    1365
esa  124|    1     0     0  -131    78    -9   .31    9    9 |    -928     268     19    118
        |    1     1     1    26    47    21   .01           |    1028    1246
gfz  179|    0     1     0    62    -3   -17  -.17   11   11 |      45     -84     24    102
        |    0     1     1    65    43    10   .05           |     184     389
grg  109|    5     1    -2    36    11    53  1.10   34   33 |     321    -222     77    231
        |    1     1     1    16    13    56   .03           |     458     836
igr  n/a|    0     0     0    61    -2   -31   .08    5    5 |  -11073      92     18     70
        |    0     0     0    25    16    32   .02           |    1513    1396
jpl  125|    1     0    -6    47    29    36   .59   18   18 |     206    -256     16     94
        |    1     1     0    22    21    29   .03           |    1258    1341
mit  269|    0     0     0    42   -38   -12  -.35   11    9 |  -13968    -840     23    137
        |    1     0     1    20    19     8   .02           |     937    1305
ngs  213|   -1     0     0    89   -88    10  -.20   10    8 | -106249 -104176   2037   3818
        |    0     0     0    45    41    23   .02           |  226840  184823
sio  247|    0     2     2  -104    45    22   .03   20   19 |     ---     ---    ---    ---
        |    0     1     1    17    10    10   .06           |     ---     ---


Table 1.1551.b   GPS week : 1551   MJD: 55101.000-55107.000   

         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  |   10   10   11    9    9   11   12 |
   2  |    5    5    5    5    5    5    5 |
   3  |    4    4    4    4    4    4    4 |
   4  |    5    5   35    5    4    5    4 |
   5  |    5    6    5    5    5    5    5 |
   6  |    4    4    4    4    4    4    4 |
   7  |    5    5    4    4    4    5    5 |
   8  |    4    4    3    4    4    5    4 |
   9  |    5    4    5    5    5    5    5 |
  10  |    4    4    4    3    4    4    4 |
  11  |    4    4    4    4    5    5    5 |
  12  |    5    4    4    5    5    5    5 |
  13  |    5    5    4    5    4    5    5 |
  14  |    4    4    5    4    4    5    5 |
  15  |    6    6    6    6    6    6    5 |
  16  |    5    5    5    5    5    6    6 |
  17  |    5    5    5    4    5    5    5 |
  18  |    5    5    5    5    5    5    5 |
  19  |    5    4    5    5    5    5    5 |
  20  |    5    5    5    5    5    5    5 |
  21  |    5    5    5    5    4    6    5 |
  22  |    5    5    5    5    5    5    5 |
  23  |    5    5    6    5    5    5    5 |
  24  |    8   10   10   14   11   11    9 |
  25  |    4    4    4    4    4    5    5 |
  26  |    6    8    6    6    5    6    5 |
  27  |    5    4    5    5    5    5    7 |
  28  |    5    5    5    5    5    5    5 |
  29  |    5    5    5    5    5    5    5 |
  30  |    4    4    4    4    4    4    5 |
  31  |    4    4    5    5    4    5    5 |
  32  |    4    4    4    4    4    4    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 2.1551.0   GPS week: 1551   Day: 0   MJD: 55101.000                            

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  224|    1     0     2    41   -21   -28  -.15    7    7 |    1334   -1735     15     70
        |                     33     4                       |
emr   76|   -2    -1    -1  -307    61    -2   .60   19   19 |    2153   -2967     18     78
        |                     25   -92                       |
esa  124|    1     0    -2   -96    39   -11   .33    9    9 |   -1807     -11     23    123
        |                      1    53                       |
gfz  179|    0     1     0   170    51     0  -.15   10   10 |     252    -341     28    102
        |                    -33    -1                       |
grg  109|    6     2    -1    20     9   -23  1.09   33   32 |     424    -221     78    213
        |                     60    69                       |
igr  n/a|    0     0     0    14   -12   -43   .07    6    5 |   -9971   -2492     21     81
        |                     -4   -40                       |
jpl  125|    3    -1    -6     0    23    60   .65   17   17 |    2297   -2749     22    120
        |                     93   -34                       |
mit  269|   -1     0     2    65     0   -12  -.38   10    8 |  -13529     161     24    149
        |                     -2   -22                       |
ngs  213|    0     0     0    11  -147    42  -.25   12   10 |   14102    2547   1886   3312
        |                     51    88                       |
sio  247|    0     0     3   -86    56    28  -.01   20   18 |     ---     ---    ---    ---
        |                     46   -37                       |

Table 2.1551.1   GPS week: 1551   Day: 1   MJD: 55102.000                            

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  224|    0     0     2    66    14    -5  -.14    7    7 |     481     -21     16     69
        |                     10   -41                       |
emr   76|   -2     0    -2  -286    64    13   .64   19   19 |    -996     908     16     79
        |                     17   -64                       |
esa  124|    1     0    -1   -98    10   -23   .30    8    8 |    -629     616     18    126
        |                     44    49                       |
gfz  179|    0     3     1   116   -38   -11  -.14   13   13 |    -288     408     25     99
        |                    -27   -32                       |
grg  109|    6     0    -1    33    38    51  1.09   33   32 |     218      57     70    249
        |                     39   -17                       |
igr  n/a|    0     0     0    65    28   -50   .10    5    5 |  -12696    1211     17     76
        |                    -33   -61                       |
jpl  125|    2     0    -7    47    69    41   .61   19   19 |    -905    1105     16     77
        |                      0   -55                       |
mit  269|    0     0     0    47   -52   -26  -.37    9    7 |  -12551   -2405     25    156
        |                    -13     7                       |
ngs  213|   -1     0     0    50   -29    44  -.19   10    8 | -229857 -410013   1959   3399
        |                     28   -16                       |
sio  247|    0     0     0  -101    24    12  -.03   18   18 |     ---     ---    ---    ---
        |                     36   -40                       |

Table 2.1551.2   GPS week: 1551   Day: 2   MJD: 55103.000                            

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  224|    0     0     1    86     1    -9  -.11    7    7 |    1049   -1262     18     74
        |                      2   -13                       |
emr   76|   -1    -3     0  -240    53    32   .56   19   19 |    -643   -1210     15     66
        |                    -14   -34                       |
esa  124|    3    -1     0  -145    37     2   .30   10   10 |     103    -809     22    124
        |                     57    26                       |
gfz  179|    0     1     0   -34     2   -13  -.08   11   11 |     178    -716     25    113
        |                    -25   -22                       |
grg  109|    6     1    -3    42    11    22  1.12   34   38 |     613   -1389     73    215
        |                    -14    59                       |
igr  n/a|    0     0     0    93     0   -70   .12    5    5 |  -11902    -879     21     74
        |                    -35    27                       |
jpl  125|    0     0    -7    60    32    51   .61   19   19 |    -236   -1108     17    101
        |                      0   -31                       |
mit  269|   -1     0     0    37   -36    -8  -.35   10    8 |  -13029   -1592     28    139
        |                     -6     5                       |
ngs  213|    0     0     0   137   -64    -7  -.19    9    6 | -578010 -335767   2079   4298
        |                    -67    31                       |
sio  247|    0     0     2   -96    42    13  -.03   19   21 |     ---     ---    ---    ---
        |                     47   -44                       |

Table 2.1551.3   GPS week: 1551   Day: 3   MJD: 55104.000                            

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  224|    0     1     0    79   -21   -10  -.14    7    7 |    1341    -671     15     58
        |                    -13    46                       |
emr   76|   -3    -1    -1  -224    49    32   .54   18   18 |   -1334     100     19     69
        |                    -25   -24                       |
esa  124|    1    -1     0  -132   117     3   .29    9    8 |   -2350     447     18    127
        |                     69   -34                       |
gfz  179|    0     0     0    31   -12   -23  -.20   11   11 |      61     -52     25    106
        |                    -63    54                       |
grg  109|    3     1    -2    25     5   144  1.14   34   32 |      57      98     80    231
        |                      0    88                       |
igr  n/a|    0     0     0    67     0   -59   .08    5    5 |  -12148     685     18     70
        |                    -25     7                       |
jpl  125|    3     0    -7    51     9    30   .55   18   18 |    -749     491     17     83
        |                      8     8                       |
mit  269|   -1     0     1    39   -37    -7  -.36   11    9 |  -14632    1426     24    129
        |                      1     3                       |
ngs  213|   -1     0     0   140  -122    -7  -.23   10    8 |   13863     303   2115   4131
        |                    -62    50                       |
sio  247|    0     2     3  -118    39    24   .02   20   20 |     ---     ---    ---    ---
        |                     78   -55                       |

Table 2.1551.4   GPS week: 1551   Day: 4   MJD: 55105.000                            

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  224|    0     1     0    76   -35     7  -.13    7    7 |     719    -366     15     68
        |                    -38    54                       |
emr   76|   -2    -5     1  -236    39    54   .60   19   19 |   -1304    -410     17     74
        |                    -41    16                       |
esa  124|    2    -2     0  -143   110    17   .31   10   10 |   -1118    1174     19    114
        |                     48   -24                       |
gfz  179|    0     2    -1    46    52   -32  -.20    9    9 |     -18    -269     23    102
        |                    -64    42                       |
grg  109|    4     0     0    46     0   109  1.07   32   31 |    -163     451     84    231
        |                    -12   120                       |
igr  n/a|    0     0     1    57   -19   -15   .06    5    5 |  -11667     221     19     65
        |                    -61    29                       |
jpl  125|    2     1    -5    67    13   -16   .58   17   17 |    -489    -260     16    103
        |                    -35    66                       |
mit  269|    0     0     0    14   -41    -1  -.34   11    9 |  -14408   -1779     19    116
        |                      1    17                       |
ngs  213|   -2     0     0    96  -113   -11  -.19    9    7 |   13966    2460   1867   4075
        |                     11    34                       |
sio  247|    1     3     3  -128    48    20   .12   20   20 |     ---     ---    ---    ---
        |                     68   -58                       |

Table 2.1551.5   GPS week: 1551   Day: 5   MJD: 55106.000                            

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  224|    1     1     1    64   -33   -34  -.15    8    8 |     122    -493     21     86
        |                     15    52                       |
emr   76|   -3    -4     2  -246    15    35   .53   20   20 |   -1088    1009     18     88
        |                    -23    31                       |
esa  124|    0     0     0  -170   127    -8   .31   10   10 |     571   -1655     16    105
        |                     53   -27                       |
gfz  179|    0     2     0    71   -16   -26  -.22    9    9 |     185      87     23     94
        |                    -48    57                       |
grg  109|    4     0    -3    19     0    38  1.11   33   31 |    1161   -1324     82    260
        |                     41    92                       |
igr  n/a|    0     0     0    49   -17     7   .05    6    6 |  -10821    1653     18     61
        |                    -31    22                       |
jpl  125|    1     0    -5    41    13    68   .57   18   17 |    -154     949     15     86
        |                    -12    67                       |
mit  269|    1    -2     0    71   -45   -15  -.34   13   12 |  -14569   -1155     20    138
        |                    -26     2                       |
ngs  213|   -2     0    -1    90   -88    11  -.19   10    8 |   10491    6278   2283   3823
        |                     -3    35                       |
sio  247|    1     3     2   -82    54    17   .07   21   20 |     ---     ---    ---    ---
        |                     64   -74                       |

Table 2.1551.6   GPS week: 1551   Day: 6   MJD: 55107.000                            

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  224|    0     1     1    80    -2    20  -.15    9    8 |    -450     543     13     60
        |                    -10    27                       |
emr   76|   -1    -3    -1  -248    50    22   .49   19   19 |     947    -381     14     70
        |                      1    -2                       |
esa  124|    0     0     1  -132   106   -47   .33   10   10 |   -1271    2117     17    109
        |                     53    10                       |
gfz  179|    0     0     1    36   -62   -17  -.21   11   11 |     -55     290     22    100
        |                    -45    45                       |
grg  109|    5     5    -1    64    17    31  1.05   37   36 |     -60     771     77    223
        |                    -37    10                       |
igr  n/a|    0     0     1    81     7     8   .11    5    5 |   -8309     246     17     63
        |                    -73    40                       |
jpl  125|    0    -2    -6    64    44    18   .57   18   18 |    1679    -222     15     94
        |                     -4    23                       |
mit  269|    1    -1    -1    25   -59   -18  -.32   13   11 |  -15060    -536     23    138
        |                    -23    11                       |
ngs  213|   -1     0     0    98   -53     0  -.19    8    7 |   11697    4959   2075   3694
        |                     -5    14                       |
sio  247|    1     5     0  -118    50    43   .08   22   20 |     ---     ---    ---    ---
        |                     65   -74                       |

       
       
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 3.1551.0   GPS week: 1551   Day: 0   MJD: 55101.000                            

        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  |   17  ---  ---   12  ---   16  ---   20   20  ---   10 |    20  ---  ---   25  ---   25  ---   22   25  ---    19
   2  |    6   19   10   11   31    5   17   14   11   17    4 |    18   33   21   16   43   21   26   23   18   27    21
   3  |    6   14   10    9   27    4   12    6   12   19    3 |    17   30   27   21   30   20   25   20   19   30    21
   4  |    7   18   10    8   30    7   12   12   13   25    4 |     8   23   14   13    6   15    9   15   13   12    13
   5  |    7   20    9   12   50    6   21   10   10   30    5 |    13   32   15   18   39   17   28   18   14   24    14
   6  |    7   15   10    8   21    4   13    8    9   18    3 |    12   26   20   16   20   15   23   16   14   25    15
   7  |    8   21    8   14   23    5   19    6    7   13    4 |    13   32   23   21   36   17   26   14   16   14    17
   8  |    7   15    7   10   24    5   10    7    9   14    3 |    14   28   16   10   22   17   23   14   13   20    15
   9  |    5   20   10    8   25    8   13   11   17   17    4 |    15   32   23   17   29   18   25   18   22   23    18
  10  |    5   14   11    6   34    5    9   11    8   15    3 |    25   35   23   26   19   27   26   29   27   21    25
  11E |    8   16    9    6   32    5   16   12   14   11    4 |    14   33   30   18   43   21   29   20   17   18    20
  12  |    7   14    9   10   30    4   16    9   13   23    4 |    19   35   25   22   42   22   31   19   19   19    21
  13  |    7   20    8   11   36    5   21    8    9   16    4 |    16   37   23   16   48   21   33   16   19   19    19
  14  |    6   20   10    8   24    3   19    6   13   12    4 |    15   32   22   17   39   18   27   16   18   16    18
  15  |    8   18   10   10   35    6   25   13   19   16    5 |    16   30   19   20   36   20   34   22   21   21    19
  16  |    6   16   11   13   32    6   19   10   18   29    5 |    17   31   26   26   33   19   28   22   19   21    20
  17  |    8   22    9   11   26    6   20   12   11   17    5 |    17   40   22   17   42   23   35   22   26   22    21
  18  |    5   21   10   12   27    4   19    7   13   21    4 |    18   35   27   24   42   22   31   18   21   21    22
  19  |    6   24    8   11   30    5   21    6   11   20    4 |    25   43   28   23   44   26   33   26   29   31    27
  20  |    7   21    7   11   56    7   23    8   13   24    5 |    22   38   30   27   47   27   30   25   26   32    25
  21  |    5   24    9   15   24    7   18   11   10   21    5 |    13   37   23   17   43   17   30   19   17   24    18
  22  |    5   18    8    8   23    6   20    8   12   21    4 |    22   33   28   27   33   25   29   25   23   27    24
  23  |    7   27   10   13   33    5   24    9    9   18    5 |    16   41   27   20   38   22   33   17   20   20    20
 X24  |   11   31   16   17  ---   18  ---   13  ---  ---    8 |    12   29   21   20  ---   26  ---   12  ---  ---    15
  25  |    6   17   11   11  ---    5   12    9   10   16    4 |    14   29   20   16  ---   16   27   16   15   20    16
 X26  |    9   21   11   12   22    6  ---   14   14   34    6 |    18   36   20   16   31   20  ---   21   20   40    19
  27  |    7   19    8    7   28    8   13   12   16   17    4 |    24   34   28   27   40   24   32   28   26   25    25
  28  |    8   18    8   14   55    7   16   10   11   34    5 |    21   40   28   32   43   28   34   26   26   29    26
  29  |    7   19   10    8   32    6   17    9   13   23    4 |    25   32   22   20   42   26   33   22   26   24    24
  30  |    6    9    9    6   24    4   10   13   11   20    3 |    26   32   31   27   37   28   30   28   27   22    27
  31  |    5   22   11    9   33    6   14    5   12   14    4 |    16   34   22   16   41   19   25   16   16   17    18
  32  |    5   16    8   11   33    6   14    5   11   25    4 |    21   30   26   24   21   25   21   24   24   35    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    9   10   33    6   17   10   12   20      |T   17   33   23   20   35   21   28   20   20   23    20
 WRMS |    7   19    9   10   32    5   17    8   10   18      |NE  17   33   23   20   35   21   28   20   20   23    20
 MEDI |    7   19   10   11   30    6   17    9   12   18      |MD  17   33   23   20   39   21   29   20   20   22    20

Table 3.1551.1   GPS week: 1551   Day: 1   MJD: 55102.000                            

        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  |   19  ---  ---   23  ---   18  ---   13   15  ---   10 |    18  ---  ---   33  ---   27  ---   21   27  ---    20
   2  |    7   18    9   12   34    6   20   12   10   15    4 |    14   27   17   12   34   15   24   15   15   18    15
   3  |    6   15    8   13   34    3   11    5    8   19    3 |    12   20   16   14   26   15   20   13   15   21    13
  X4  |    6   18    7   11  ---    5  ---   10   10   23    4 |     8   23   13   12  ---   10  ---   14   11   13    11
   5  |    5   21   10   15   32    7   24   12   15   28    5 |    14   30   17   16   32   15   29   13   18   23    14
   6  |    7   15    6   11   26    3   13    5    7   19    3 |     9   19   13    9   18    9   19   12   12   19    10
   7  |    9   23    7   15   29    4   20    7   11   12    4 |    13   28   19   19   41   14   25   11   14   11    14
   8  |    7   18    9   14   27    4   13    6    8   12    4 |    10   28   18   14   23   12   21   11   10   13    11
   9  |    7   19    7   11   35    5   14   10   10   14    4 |    19   34   23   18   35   21   26   24   22   26    21
  10  |    6   11    9   10   30    7   13   10   10   12    3 |    22   22   23   26   18   21   18   20   23   17    20
  11E |    6   18    9    9   30    5   19    6    8   10    3 |     7   28   17   12   37   12   23   11   14   11    12
  12  |    7   13    8   13   31    3   16    8   11   22    4 |    15   30   23   18   36   19   26   16   24   17    18
  13  |    8   23    6   10   34    5   25    9    9   15    4 |    13   32   19   18   45   16   30   15   18   15    16
  14  |    6   17    9   13   33    4   21    6   10   14    4 |    11   26   18   15   39   13   25   12   16   14    13
  15  |    9   22   10   15   32    4   26   13   14   10    5 |    15   33   22   19   31   19   30   19   25   20    20
  16  |    8   18    8   17   28    5   19    8    8   30    5 |    17   30   21   17   32   20   29   19   21   18    19
  17  |    6   25    8   16   27    3   25   12    8   14    5 |    14   33   16    9   33   13   29   16   11   17    13
  18  |    6   18   10   16   31    3   23    7   10   18    4 |    15   35   27   21   41   19   31   16   18   21    19
  19  |    7   21    8   12   27    4   19    8    6   20    4 |    18   31   16   17   31   18   24   16   17   21    17
  20  |    6   21    6   13   62    5   24    8   12   22    4 |    20   34   26   25   34   24   29   20   25   31    22
  21  |    5   24   11   15   21    6   25    8   10   14    5 |    10   33   21   12   38   14   28   15   16   17    16
  22  |    7   18    9   12   23    4   21    9    8   18    4 |    14   30   23   20   39   18   28   19   17   22    18
  23  |    6   25    9   13   30    5   25    7    7   17    4 |    15   32   21   19   37   17   28   15   18   17    17
 X24  |   14   22   15   25  ---   18  ---   11   37  ---    9 |    10   28   22   28  ---   18  ---   12   33  ---    14
  25  |    8   16    8   10  ---    6   12    9    9   14    3 |    16   28   20   16  ---   18   27   17   21   22    18
 X26  |   12   19   12   20  ---    4  ---   14   30  ---    8 |    14   31   20   16  ---   16  ---   19   29  ---    15
  27  |    8   20    6   11   40    4   15   12    9   11    4 |    30   43   35   31   45   32   35   34   31   33    32
  28  |    7   19   10   16   39    6   21    8   11   31    5 |    11   32   18   21   31   16   27   15   18   20    14
  29  |    6   23   12   12   29    7   19    9    8   19    4 |    17   30   17   21   35   20   27   14   18   18    15
  30  |    8    9    5   12   25    4   10   11    8   14    3 |    20   26   23   18   35   20   25   21   23   17    20
  31  |    6   22    9   13   41    5   18    6    7   15    4 |    13   31   16   14   46   14   23   12   13   14    13
  32  |    8   17    8   10   27    5   15    4    7   24    4 |    16   21   18   15   24   15   17   17   16   28    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    8   13   33    5   19    9   10   18      |T   14   29   19   17   33   17   25   16   19   19    16
 WRMS |    7   19    8   13   32    5   19    7    8   18      |NE  14   29   20   18   33   17   25   16   19   19    16
 MEDI |    7   19    9   13   30    5   19    8    9   15      |MD  14   30   19   17   35   16   26   15   18   18    16

Table 3.1551.2   GPS week: 1551   Day: 2   MJD: 55103.000                            

        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  ---  ---   16  ---   23  ---   18   19  ---   11 |    26  ---  ---   24  ---   31  ---   23   34  ---    22
   2  |    5   17   11    9   30    6   21   11   10   15    4 |    14   27   22   18   34   18   28   16   19   20    16
   3  |    6   13    8   10   27    5   12    5    7   21    3 |    14   17   14   15   19   16   19   16   17   18    13
  X4  |   15  ---   52  ---  ---   26  ---  ---  ---  ---   34 |    11  ---   71  ---  ---   17  ---  ---  ---  ---    13
   5  |    6   20    9    9   38    3   23   10   13   29    5 |    13   30   16   16   33   15   28   16   18   22    13
   6  |    6   13    8    9   21    6   16    6   10   21    4 |    12   18   12   15   19   15   20   15   19   18    12
   7  |    8   20    8    9   26    4   20    7    4   13    4 |    12   26   18   18   38   15   25   13   12   13    13
   8  |    8   13    7    9   27    5   10    7    7    9    3 |    11   23   15   12   25   14   22   13   11   16    11
   9  |    6   23    9   14   28    7   13   16   12   14    5 |    18   35   18   26   28   21   26   20   20   25    19
  10  |    7   13    8    9   33    4   11   12   12   14    4 |    24   31   23   26   20   23   23   27   27   22    24
  11E |    7   16   13    8   33    3   21    8    8   10    4 |    21   29   24   19   47   22   30   19   22   19    19
  12  |    6   14    7    7   32    4   15    7   10   23    4 |    18   27   20   21   34   22   28   20   24   20    19
  13  |    6   14    9    9   33    4   24   11    7   14    4 |    15   29   18   18   44   17   30   16   15   16    15
  14  |    8   19   14   10   25    6   21    8    6   13    4 |    13   25   18   16   36   16   26   16   15   15    14
  15  |    8   19   13    8   28    4   27   15   15   14    5 |    18   31   17   22   32   20   32   20   27   21    18
  16  |    8   20    9   14   35    6   17   11   11   30    5 |    19   26   20   24   28   22   27   20   22   19    18
  17  |    7   23   11   12   26    4   22   10   10   15    4 |    15   31   18   14   35   17   28   17   21   21    15
  18  |    6   20    9   14   26    6   21    6    7   19    4 |    14   31   22   22   36   19   30   16   20   18    17
  19  |    6   20    9   12   28    5   22    8    9   20    4 |    20   28   20   17   29   20   27   18   21   23    17
  20  |    6   21    8   11   73    5   21    6   10   24    4 |    19   30   23   23   49   22   25   18   19   29    19
  21  |    6   20   10   14   33    7   23    8   10   15    4 |    14   31   20   17   36   18   30   16   19   17    16
  22  |   10   16   11   10   22    5   21   15    6   19    5 |    19   29   24   23   34   20   28   22   19   22    19
  23  |    7   28   15   12   34    3   25    9    7   17    5 |    16   35   23   17   36   18   30   16   16   16    16
 X24  |   22   24   33   18  ---   12  ---   14   23  ---   10 |    13   22   37   20  ---   22  ---   16   36  ---    18
  25  |    8   14    8    8  ---    5   10    8    6   12    3 |    15   25   23   20  ---   18   25   17   15   20    17
 X26  |    9   18   11   13   26    5  ---   13    9   35    6 |    13   26   17   20   30   18  ---   23   17   39    15
  27  |    7   22    9   11   36    7   15   17   12   11    5 |    21   36   21   28   29   23   27   22   25   25    22
  28  |    7   20   11   10   52    8   19    7    8   31    5 |    18   32   27   23   34   21   30   21   20   25    20
  29  |    8   20   11    9   33    9   18    8   11   19    4 |    20   26   20   20   41   23   28   18   26   21    19
  30  |    8   10    7   13   30    5    9   10    5   15    3 |    23   25   25   26   38   24   27   26   23   20    22
  31  |    6   27   12   10   45    4   17    6    9   15    4 |    15   34   17   19   45   19   25   16   19   18    16
  32  |    6   15   10   12   25    3   15    5   10   25    4 |    15   21   16   18   22   15   15   16   16   26    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19   10   11   34    5   19   10    9   19      |T   16   27   21   19   33   19   26   18   20   20    16
 WRMS |    7   19   10   11   38    5   19    8    6   21      |NE  16   27   21   19   32   19   26   18   20   20    16
 MEDI |    7   19    9   10   30    5   19    8   10   15      |MD  15   28   20   20   34   19   27   17   19   20    17

Table 3.1551.3   GPS week: 1551   Day: 3   MJD: 55104.000                            

        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  |   17  ---  ---   10  ---   19  ---   16   16  ---    9 |    18  ---  ---   24  ---   30  ---   21   26  ---    19
   2  |    7   20    8   13   37    5   19    9    8   18    4 |    17   29   18   19   31   18   27   19   15   23    17
   3  |    6   12    7   11   19    4   12    8   10   18    3 |    15   23   16   18   18   17   21   18   19   21    15
  X4  |    8   19    9    8   28    5  ---    7    7   23    4 |    10   25   12   15   18   13  ---   15   10   17    13
   5  |    7   19    8    9   40    6   22   12    8   28    5 |    12   28   16   18   36   15   28   17   16   23    13
   6  |    6   13    6    9   16    4   12    7   11   18    3 |    14   21   14   15   18   12   20   15   17   18    12
   7  |    7   18    7   11   23    6   18    9    8   13    4 |    15   28   18   18   38   16   23   14   17   14    15
   8  |    8   14    7    7   28    5   11   11    9   13    3 |    11   24   15   13   25   14   21   12   14   15    13
   9  |    9   20    7   11   21    5   14   15   10   14    4 |    17   31   21   23   27   18   28   20   21   24    19
  10  |    5   13    5    9   40    7   13   11    5   12    3 |    20   24   18   23   22   19   18   25   19   19    19
  11E |    5   16   12   11   39    4   17   13    7   11    4 |    19   30   22   24   37   23   28   22   24   20    20
  12  |    8   13    8    8   31    5   12   10   13   25    4 |    19   29   22   18   40   20   27   19   21   18    19
  13  |    6   15    8   11   35    5   21   13   10   15    4 |    17   30   20   16   48   18   31   18   20   17    17
  14  |    7   15   10    9   23    5   17   10   10   15    4 |    12   26   13   17   34   13   22   14   20   14    13
  15  |    9   20   11   10   35    4   27   15   12   14    5 |    16   29   17   21   38   17   31   18   18   22    17
  16  |    8   16    9   15   35    5   18   10   12   30    5 |    18   29   21   22   30   18   29   20   19   19    18
  17  |    6   22    7   11   29    5   20    7    8   16    4 |    13   31   18   17   40   18   30   17   20   21    17
  18  |    6   19    8   16   35    4   20    6    7   19    4 |    18   32   23   25   38   20   29   19   15   18    19
  19  |    6   24   11    9   29    4   21    9    9   20    4 |    21   35   20   19   37   22   29   24   26   27    22
  20  |    6   20    7   15   60    4   23    7   11   25    5 |    25   36   30   32   53   27   31   26   30   31    27
  21  |    7   25    8   18   41    6   22    9   11   16    5 |    14   32   19   15   44   17   28   16   14   17    15
  22  |    7   17    7   11   25    5   20   14    7   20    4 |    18   32   24   26   36   22   29   23   22   23    21
  23  |    6   22   10   14   39    3   24    9    9   17    5 |    17   33   19   21   40   18   29   19   18   20    18
 X24  |   15   27  ---   29  ---   22  ---   15   43  ---   13 |    15   25  ---   31  ---   26  ---   16   60  ---    19
  25  |    8   12    6   10  ---    6   11   12    9   13    3 |    20   28   21   23  ---   22   30   22   23   24    21
  26  |   10   15   12   10   22    6   11   16   13   32    5 |    15   31   15   20   30   16   20   22   21   39    17
  27  |   10   21   11   11   23    5   16   16   10   11    5 |    29   43   38   38   33   31   37   33   32   33    33
  28  |    7   18    7   10   55    9   19    8   10   34    5 |    19   35   26   27   38   26   33   25   28   27    23
  29  |    7   21   10   11   37    7   17    9   12   19    4 |    22   29   23   21   43   23   28   19   26   24    21
  30  |    9   10    8    8   23    4    7   15    9   16    4 |    24   27   23   26   38   22   25   27   23   22    23
  31  |    7   22   10    8   43    4   18    9   11   12    4 |    13   29   18   13   46   14   24   16   16   15    14
  32  |    7   17    9   10   21    4   14    6    8   25    4 |    20   25   25   24   27   21   19   23   23   31    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   18    9   11   34    5   18   11   10   20      |T   17   29   20   21   34   19   26   19   21   21    18
 WRMS |    7   18    8   11   32    5   18    9    8   20      |NE  17   29   20   21   34   19   26   19   21   21    18
 MEDI |    7   18    8   10   31    5   18   10   10   17      |MD  17   29   19   21   37   18   28   19   20   21    18

Table 3.1551.4   GPS week: 1551   Day: 4   MJD: 55105.000                            

        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  |   17  ---  ---   13  ---   19  ---   13   16  ---    9 |    17  ---  ---   30  ---   29  ---   21   28  ---    22
   2  |    6   24    7   11   31    4   15    9    8   23    4 |    11   26   13   12   27   11   20   12   16   21    11
   3  |    8   14   11    8   22    3   11    8    6   17    3 |    10   19   17   14   21   10   17   12   10   19     9
   4  |    7   19    8    9   25    6   13    9    9   24    4 |     9   23   14   11   18   12   15   15   16   21    11
   5  |    6   19    9   14   40    5   23   11    9   28    5 |    13   31   16   16   36   14   26   18   14   22    12
   6  |    6   14    9    6   19    4   11    8    6   17    3 |    10   20   13   13   22   10   18   13   14   18    10
   7  |    7   20    9    9   26    3   16    9    9   15    4 |    11   29   20   16   38   14   22   12   16   13    13
   8  |    9   17   11    8   24    5   13   11    7   13    4 |     9   25   19   12   26   11   22   13   12   16    12
   9  |    8   20   10   11   23    5   14   14   13   14    4 |    14   28   18   14   25   12   24   15   16   20    14
  10  |    6   11    8    8   42    6   10    9    7   18    3 |    21   29   25   23   27   22   20   27   23   23    22
  11E |    7   19   11    8   29    5   20   11   10   13    4 |    18   38   25   22   40   20   32   22   27   22    22
  12  |    8   15    8    9   29    7   13   11    9   27    4 |    16   29   18   22   34   16   25   18   21   17    17
  13  |    6   17    8    7   36    5   23   11    5   16    4 |    12   29   18   14   46   13   27   16   15   15    14
  14  |    6   20   11    6   25    5   20   10    7   13    4 |    12   27   14   17   34   13   23   17   14   16    13
  15  |   10   26   19   12   27    3   27   14   15   16    6 |    16   37   24   20   30   19   32   19   24   24    19
  16  |    8   15    9   15   31    4   16   10    8   30    5 |    13   24   18   22   28   14   21   17   14   13    13
  17  |    8   24    7    9   35    2   22   11   12   17    5 |    13   33   17   13   44   15   28   14   21   23    15
  18  |    7   18   10   10   50    3   19    7   11   20    4 |    11   31   17   15   43   13   28   13   18   17    13
  19  |    7   23   11    9   32    4   20    8    8   20    4 |    14   32   14   14   35   15   25   17   20   20    15
  20  |    7   19   11    9   52    5   23    9    9   25    4 |    20   32   29   22   34   20   27   22   28   28    22
  21  |    6   17   10    9   32    5   20    8    7   14    4 |    13   29   22   14   43   16   29   14   17   15    14
  22  |    8   16    9    8   27    4   17   17    8   19    4 |    14   28   18   20   36   16   25   23   20   19    16
  23  |    7   22   11   11   37    4   23    9    7   18    4 |    12   31   19   18   41   14   28   14   15   16    14
 X24  |   21   28   24   31  ---   12  ---   19   18  ---   10 |    13   36   28   35  ---   20  ---   22   35  ---    20
  25  |    7   17    7    7  ---    5   15   12    8   13    4 |    12   23   17   14  ---   13   26   12   15   16    12
  26  |    9   20   11   10   23    4   11   15   10   31    5 |    11   31   14   18   31   13   19   22   13   40    13
  27  |    8   17   12   10   25    5   16   15   12   11    4 |    25   34   26   25   31   23   33   28   29   28    26
  28  |    6   17    9   11   41    5   17    9    8   33    4 |    18   31   22   24   33   18   29   19   20   26    20
  29  |    7   18   14   11   33    9   19   10    8   21    4 |    19   30   15   18   36   19   27   16   19   22    15
  30  |   10   11    5    6   21    5    6   11    7   17    3 |    27   29   29   28   29   25   29   28   29   24    27
  31  |    4   22    9    6   49    4   17    9    7   12    4 |    11   26   15   13   47   11   21   16   13   13    11
  32  |    6   16   11    8   23    4   15    7    6   24    4 |    16   19   20   15   21   15   13   17   19   26    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19   10    9   32    5   17   11    9   20      |T   14   28   19   18   32   15   24   17   19   20    15
 WRMS |    7   19   10    9   31    5   17    9    7   20      |NE  14   28   18   18   32   15   24   17   18   20    15
 MEDI |    7   18   10    9   29    5   16   10    8   17      |MD  13   29   18   16   34   14   25   17   17   20    14

Table 3.1551.5   GPS week: 1551   Day: 5   MJD: 55106.000                            

        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  ---  ---   16  ---   18  ---   14   20  ---   11 |    13  ---  ---   26  ---   19  ---   18   23  ---    16
   2  |    7   22    8    9   41    4   16   10    9   25    4 |    11   25   14   12   23   12   18   13   15   23    12
   3  |    8   14   10   10   20    6   13   10   10   16    4 |    16   25   19   18   18   15   20   18   18   20    16
   4  |    8   22    9    8   17    5   13   11   10   25    4 |     9   27   14   14   19   11   17   17   15   18    12
   5  |    8   20    9    8   48    5   20   12   11   28    5 |    11   31   17   15   30   13   28   16   13   22    12
   6  |    7   16   10    9   18    6   13   10   10   15    4 |    11   24   15   17   21   10   17   15   14   16    12
   7  |    9   25   10   10   26    6   15   14   10   15    4 |    13   30   23   19   36   16   24   14   16   14    16
   8  |    9   14   10    9   24    8   16   15   11   13    4 |    10   22   16   11   23   14   21   14   13   15    12
   9  |    8   20    9   10   23    7   15   16    9   14    4 |    16   28   23   18   28   18   27   20   20   22    19
  10  |    6   13    8    6   36    5    9   12   12   16    3 |    14   26   16   19   14   15   19   20   16   18    15
  11E |    7   18   10    8   34    7   21   23   11   12    5 |    24   38   29   28   37   28   36   30   32   27    27
  12  |    7   18   10    7   28    6   13   12    7   29    4 |    15   28   18   16   37   16   27   18   17   17    16
  13  |    8   17   10    8   39    6   21   14    9   15    4 |    12   30   19   15   49   15   26   15   15   16    14
  14  |    7   21   11    6   28    5   21   12    8   14    4 |    13   30   20   17   34   15   27   17   15   18    16
  15  |    9   23   11   13   24    5   26   16   16   15    6 |    15   34   19   21   28   19   32   18   24   21    19
  16  |    8   18   13   13   37    5   19   10   11   31    5 |    14   28   17   19   31   16   25   19   15   21    15
  17  |    7   26   10   10   40    4   21   10   11   20    5 |     8   31   14   12   43   12   25   13   16   19    11
  18  |    7   20   11   10   38    5   21    8   10   20    4 |    12   33   21   16   39   15   30   15   16   18    16
  19  |    6   22   11    9   30    5   19   10   10   20    4 |    18   35   17   17   32   20   26   19   22   22    19
  20  |    7   20    8   10   59    5   20    8    7   24    4 |    15   32   21   18   44   17   27   18   19   26    18
  21  |    8   30   10   15   36    7   23   10   12   15    5 |    11   34   18   13   41   14   29   12   15   15    12
  22  |    8   19   10    7   26    5   19   19   11   19    5 |    16   32   23   18   35   18   27   24   20   21    19
  23  |    8   24   10   13   35    5   21   12    6   19    5 |    12   32   17   19   37   15   27   16   18   17    15
 X24  |   16   25   14   31  ---   13  ---   14   36  ---   10 |    12   29   18   29  ---   13  ---   18   47  ---    17
  25  |    8   16    9    7  ---    5   17   17    9   13    4 |    16   26   22   22  ---   18   30   18   19   19    18
  26  |   10   23   10    9   16    5   12   17   11   31    5 |    12   37   20   16   24   16   23   22   17   41    17
  27  |   12   19    9   11   27    8   18   17   12   11    5 |    31   34   31   28   43   28   40   29   29   25    28
  28  |    8   17   11    8   35    8   15   11   11   36    5 |    16   31   24   18   37   21   28   19   21   24    19
  29  |    7   24   12   10   33    8   18   10   13   22    5 |    16   29   13   13   38   17   25   15   17   22    13
  30  |    9   17    8    6   30    6    8   15    6   21    4 |    18   24   23   21   39   18   24   23   20   20    19
  31  |    7   22   13    5   43    5   19   13    8   13    4 |    11   28   15   14   43   13   24   22   14   14    14
  32  |    7   17    8   11   30    5   13    8    7   25    4 |    14   18   14   17   22   14   14   14   17   25    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   20   10    9   33    6   18   13   10   21      |T   14   29   19   18   32   16   25   18   19   20    16
 WRMS |    8   20   10    9   31    6   17   12    8   20      |NE  13   29   18   17   32   15   25   17   18   20    15
 MEDI |    8   20   10    9   30    5   18   12   10   19      |MD  13   30   18   17   35   15   26   18   17   20    16

Table 3.1551.6   GPS week: 1551   Day: 6   MJD: 55107.000                            

        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  |   19  ---  ---   19  ---   27  ---   20   23  ---   12 |    18  ---  ---   34  ---   39  ---   25   46  ---    29
   2  |    7   23   10   11   42    5   17   10    8   25    4 |    15   28   14   11   33   15   22   13   16   25    13
   3  |    9   12    9    9   23    4   11   13    8   17    4 |    13   16   13   16   17   11   16   18   15   18    11
   4  |    9   18    9    9   29    5   13   12    9   20    4 |     8   24   13   13   21   10   12   17    9   21    10
   5  |    7   19   10   11   60    6   22   11    7   30    5 |    16   31   21   20   38   17   29   21   18   27    17
   6  |    7   14    8   10   22    4   12   13    6   17    3 |    12   17   12   15   16   10   16   16   12   19    10
   7  |   11   20    9   11   33    5   17   13    9   14    4 |    11   31   21   16   38   16   22   17   19   16    15
   8  |    9   13    7   10   22    6   12   15    8   14    4 |     9   21   19   10   26   13   22   18   14   17    12
   9  |    9   18   12   11   24    5   16   15    6   14    4 |    16   29   21   22   29   17   28   21   19   25    19
  10  |    5   13    8   10   68    6   11   12    9   19    4 |    24   29   25   28   23   23   23   30   25   24    24
  11E |   10   18    8    9   47    5   21   18    7   14    5 |    17   28   21   18   37   18   28   24   21   20    18
  12  |   10   14    9    9   39    5   14   10    8   34    4 |    22   32   24   26   43   23   30   25   26   29    23
  13  |    9   18   10    8   46    3   20   12    6   16    4 |    15   29   21   16   51   17   29   17   17   18    16
  14  |    8   21    9    8   28    5   23    9    6   13    4 |    17   33   19   19   37   16   29   18   17   17    17
  15  |    8   19   10   11   27    5   23   13    7   14    4 |    16   31   18   21   35   19   33   18   19   24    18
  16  |   10   16   16   16   33    6   19   11    9   34    5 |    17   24   23   28   27   17   23   21   16   15    17
  17  |    7   20    8   11   35    6   21   10    8   19    4 |    14   31   15    9   50   15   29   14   15   22    14
  18  |    6   22   11   15   29    6   24    8    9   24    5 |    16   33   27   28   36   20   30   19   20   22    20
  19  |    8   22   10   12   33    4   22   11    8   21    5 |    23   34   14   16   39   22   30   23   21   26    20
  20  |    8   21   11   14   51    5   22    8    6   23    5 |    23   29   30   28   41   22   25   23   23   29    22
  21  |    9   24   12   16   46    7   23   10    9   14    5 |    13   30   19   14   43   16   29   14   18   17    14
  22  |    7   19    8   11   28    5   23   16    9   22    5 |    24   34   30   31   40   25   30   28   27   29    26
  23  |    8   23   10    9   42    4   22    8    7   20    4 |    16   32   21   17   42   18   30   18   20   19    17
 X24  |   15   30   16   24  ---   14  ---   14   23  ---    9 |    19   30   31   33  ---   19  ---   27   37  ---    24
  25  |   10   16   11    6  ---    4   14   17    7   13    4 |    14   25   21   17  ---   16   24   18   14   20    15
  26  |   11   20    9   12   22    5   12   11    9   32    5 |    13   32   16   15   28   15   21   19   16   42    15
  27  |   16   20   12   14   42    9   19   24    8   33    6 |    78   89   84   93   53   80   82   97   84   99    87
  28  |    7   15    9   11   44    7   16    9    8   35    5 |    23   34   29   26   37   26   33   25   25   31    25
  29  |    9   21   12    7   27    6   17    9    9   24    4 |    23   31   18   19   41   21   30   19   19   27    18
  30  |   10   17    8   10   34    6   10   13    6   26    4 |    31   34   35   35   51   30   33   36   33   32    32
  31  |    6   21   10   10   35    6   18   12    8   16    4 |    14   26   18   17   45   14   25   20   18   19    15
  32  |   10   17    9   11   21    4   14   10    6   24    4 |    19   24   21   22   22   19   19   19   20   29    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19   10   11   37    5   18   13    8   22      |T   19   30   23   22   35   20   27   23   22   25    20
 WRMS |    8   19   10   11   36    5   18   11    7   20      |NE  19   30   23   23   35   20   27   23   22   26    20
 MEDI |    9   19   10   11   33    5   17   12    8   20      |MD  16   30   21   19   37   17   28   19   19   22    17



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 4.1551   GPS week: 1551   MJD: 55101.0-55107.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3059 |U    7     6    17 |U    6     9    20 |U    6     6    15 |
emr | emr 2958 |     8     9    22 |U    7    11    24 |     8     9    21 |
esa | esa 2948 |     8     7    20 |U    6     9    19 |     7     7    17 |
gfz | gfz 3045 |U    7     7    20 |U    9    11    25 |    13    15    19 |
grg | grg 2742 |     8     9    25 |U   26    34    51 |    10    10    24 |
igr | igr 2985 |     7     6    18 |     6     9    20 |     7     7    16 |
igs | igs 2948 |     7     6    17 |     6     9    21 |     6     6    16 |
jpl | jpl 2797 |U    8     8    22 |U    7    10    26 |U    9     8    20 |
mit | mit 3058 |U    7     6    18 |U    8    12    33 |U   28     9    72 |



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 5.1551.0   GPS week: 1551   Day: 0   MJD: 55101.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3063 |     6     7    15 |     6     8    17 |     6     7    12 |
emr | emr 2976 |     7     7    18 |     7     6    22 |    10     9    18 |
esa | esa 2976 |     7     6    17 |     6     8    15 |     7     6    13 |
gfz | gfz 3065 |     6     5    17 |     6     8    22 |     6     6    16 |
grg | grg 2784 |     8     8    19 |     7     7    27 |    11     8    25 |
igr | igr 2996 |     6     6    16 |     6     6    16 |     6     6    13 |
igs | igs 2977 |     6     5    16 |     6     7    17 |     6     6    12 |
jpl | jpl 2783 |     8     7    19 |     6     6    24 |    10     8    17 |
mit | mit 3072 |     6     7    14 |     9    11    29 |  ----  ----  ---- |

Table 5.1551.1   GPS week: 1551   Day: 1   MJD: 55102.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3060 |     6     6    14 |     7    10    19 |     9     7    16 |
emr | emr 2962 |     8     9    17 |     7     8    19 |     9    10    17 |
esa | esa 2976 |     7     6    17 |     6     8    16 |     8     7    15 |
gfz | gfz 3041 |     7     7    16 |     8    10    25 |     8     8    16 |
grg | grg 2592 |     8     8    25 |     8    10    31 |    13    13    27 |
igr | igr 3037 |     6     6    15 |     7     8    18 |     8     7    14 |
igs | igs 2898 |     6     6    14 |     6     8    20 |     7     7    17 |
jpl | jpl 2688 |     9     9    21 |     7    10    27 |    12    10    20 |
mit | mit 3072 |     6     4    15 |     7     7    19 |     7     7    18 |

Table 5.1551.2   GPS week: 1551   Day: 2   MJD: 55103.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
emr | emr 2877 |    11     9    23 |     9    15    33 |    11    13    24 |
esa | esa 2880 |     8     6    22 |     8    11    29 |     9    11    17 |
gfz | gfz 2964 |     8     6    21 |    19    13    37 |     9    11    18 |
grg | grg 2688 |     9     6    29 |   135   188   204 |    11    13    30 |
igr | igr 2922 |     8     6    21 |     9    12    30 |     9     9    18 |
igs | igs 2913 |     8     6    19 |     9    12    31 |     9     9    16 |
jpl | jpl 2688 |    10     9    27 |     9    12    39 |    12     9    24 |
mit | mit 2976 |     7     6    20 |    11    15    42 |  ----  ----  ---- |

Table 5.1551.3   GPS week: 1551   Day: 3   MJD: 55104.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3066 |     6     5    21 |     6     8    17 |     6     6    17 |
emr | emr 2971 |     7     9    23 |     6     9    18 |     7     7    21 |
esa | esa 2880 |     8    10    29 |     6     8    15 |     7     7    20 |
gfz | gfz 3048 |     7     6    25 |     8    10    18 |    51    59    28 |
grg | grg 2784 |     8    12    33 |     7     7    18 |     8     9    21 |
igr | igr 2979 |     6     5    22 |     6     9    15 |     7     6    18 |
igs | igs 2964 |     6     5    20 |     6     8    15 |     6     6    19 |
jpl | jpl 2784 |     8     8    24 |     7     9    17 |     7     8    20 |
mit | mit 3072 |     7     6    22 |     6     7    16 |  ----  ----  ---- |

Table 5.1551.4   GPS week: 1551   Day: 4   MJD: 55105.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3050 |     7     5    18 |     5     9    21 |     8     8    21 |
emr | emr 2973 |     8     8    25 |     5    12    27 |     9     8    30 |
esa | esa 2976 |     7     6    20 |     5     9    21 |     6     7    21 |
gfz | gfz 3063 |     9     9    26 |     8    13    25 |     7     7    22 |
grg | grg 2784 |     9    11    22 |     6    11    28 |     9     9    27 |
igr | igr 2974 |     8     6    19 |     5     9    23 |     6     5    20 |
igs | igs 2958 |     7     6    19 |     4     9    21 |     7     6    21 |
jpl | jpl 2880 |     8     8    19 |     5    10    25 |     7     7    25 |
mit | mit 3072 |     8     7    18 |     6     9    25 |    92    12   235 |

Table 5.1551.5   GPS week: 1551   Day: 5   MJD: 55106.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3060 |     8     6    15 |     5     8    22 |     6     6    16 |
emr | emr 2975 |     9     8    25 |     6    12    27 |     8     9    21 |
esa | esa 2976 |     8     6    16 |     5     8    19 |     6     6    19 |
gfz | gfz 3069 |     7     5    16 |     8    11    27 |     6     7    18 |
grg | grg 2784 |     8    10    26 |     7     7    24 |     8     9    19 |
igr | igr 3035 |     8     6    16 |     4     9    19 |     6     7    18 |
igs | igs 3048 |     8     5    17 |     5     8    20 |     6     7    16 |
jpl | jpl 2880 |     8     7    19 |     5    10    24 |     8     8    21 |
mit | mit 3072 |     7     5    17 |    13    27    77 |     6     8    21 |

Table 5.1551.6   GPS week: 1551   Day: 6   MJD: 55107.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3062 |     7    10    20 |     6     8    25 |     5     6    12 |
emr | emr 2974 |     9     9    22 |     7    12    24 |     6     5    16 |
esa | esa 2976 |     8     9    19 |     6     9    21 |     5     6    13 |
gfz | gfz 3065 |     7     9    18 |     8    12    25 |     6     7    13 |
grg | grg 2784 |     8     8    20 |     9     9    27 |     8     7    19 |
igr | igr 2953 |     7    10    18 |     6    11    21 |     5     6    11 |
igs | igs 2880 |     7     9    18 |     6    10    21 |     5     6    11 |
jpl | jpl 2880 |     8    11    21 |     7    10    23 |     8     7    15 |
mit | mit 3072 |     7     7    17 |     8    11    27 |     7     9    12 |


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 6.1551   GPS week: 1551   MJD: 55101.500-55107.500

                                                         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 |     -12       3      52    -131      3 |      11     17
            |      28      18      80      76      5 |       3
emr   uuuuu |      31      12      10      34      1 |      71     72
            |      37      17      80      81     12 |       4
esa   uuuuu |      -1     -43      93     122      7 |      26     30
            |      44      29     125     137     19 |       3
gfz   uuuuu |     -14      47     -56    -140      0 |      -5     12
            |      30      14      55      44      3 |       1
grg   xxxxx |     -54      -8      78    -140     -2 |      -3     33
            |      42      30      81     125     41 |       7
igr   xxxxx |       3      41      91     -60      1 |       2     13
            |      33      20      52      48     10 |       2
irf   xxxxx |       6       3     -26     -28      3 |      -1     11
            |       9       9      30      33      4 |       2
jpl   uuuuu |       0      -4      81      13     -6 |      26     29
            |      40      34      93      99      9 |       3
mit   uuuuu |       3      13    -167      38      2 |      13     18
            |      14      14      87      64      5 |       2
ngs   uuuuu |     -27      10      59    -109     -4 |       1     13
            |      30      38      85     169      8 |       3
sio   uuuuu |      61     -55       3      72      8 |      33     35
            |      23      22      88      85      6 |       3


Table 7.1551.0   GPS week: 1551   Day: 0   MJD: 55101.500

                                                         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     -15     -99     -51     12 |       6     15
emr   uuuuu |      96      -7      89     105     12 |      66     67
esa   uuuuu |     -49      17      56     196     30 |      22     24
gfz   uuuuu |       5      51    -107    -129      3 |      -5     11
grg   xxxxx |     -65     -42      -1    -343    -82 |      10     32
igr   xxxxx |      44      22     126      -1     -4 |       0     10
irf   xxxxx |       4      18       4      12      9 |      -2      8
jpl   uuuuu |      38     -75      -1     -47     11 |      23     28
mit   uuuuu |      26      20    -113      77      4 |      12     15
ngs   uuuuu |     -84     -33     127    -368    -18 |       5     12
sio   uuuuu |      41     -28      52     177      7 |      32     34

Table 7.1551.1   GPS week: 1551   Day: 1   MJD: 55102.500

                                                         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 |      33       3      78    -206      6 |       8     15
emr   uuuuu |      56      -4     100     -77      5 |      67     68
esa   uuuuu |     -57     -31     -51     -22     22 |      23     26
gfz   uuuuu |      24      40    -111    -104      2 |      -6     11
grg   xxxxx |       9     -26     105     -27     -8 |      -2     38
igr   xxxxx |      53      46      20     -27     11 |      -1     11
irf   xxxxx |      -8      13     -41     -90      2 |      -2      8
jpl   uuuuu |      47      13     160     166     -2 |      24     29
mit   uuuuu |     -15      26     -55     -53     -5 |      11     15
ngs   uuuuu |       8     -15      26     108     -4 |       2     13
sio   uuuuu |      32     -23      98       0      5 |      30     32

Table 7.1551.2   GPS week: 1551   Day: 2   MJD: 55103.500

                                                         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 |      12      -7      85    -122      0 |       9     15
emr   uuuuu |      33       9      72      32      6 |      68     68
esa   uuuuu |     -27     -62     225      80     17 |      24     27
gfz   uuuuu |      21      20    -104    -145      1 |      -6     11
grg   xxxxx |     -60       9      26    -148    -18 |      -5     38
igr   xxxxx |     -28      30      28    -110      8 |       0     10
irf   xxxxx |      -1      -5      14     -27      4 |      -3      9
jpl   uuuuu |      30      -5     -49     102     -6 |      26     29
mit   uuuuu |      -6       1    -122      62      1 |      11     15
ngs   uuuuu |     -32      62     -45    -136     -7 |       0     13
sio   uuuuu |      43     -52     103      91      8 |      30     31

Table 7.1551.3   GPS week: 1551   Day: 3   MJD: 55104.500

                                                         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 |     -42      12      46     -45     -4 |      14     19
emr   uuuuu |      28      24     -14     111     10 |      72     74
esa   uuuuu |      38     -70     182     182      4 |      28     34
gfz   uuuuu |     -50      62     -48    -156      1 |      -3     14
grg   xxxxx |     -84      -1     123    -151      7 |      -2     38
igr   xxxxx |      -3      24      69     -51     12 |       3     15
irf   xxxxx |       4      -1     -34     -43      4 |       0     13
jpl   uuuuu |      -4      -9      58      26    -11 |      30     33
mit   uuuuu |       1      -2    -194      58      3 |      14     20
ngs   uuuuu |     -46      61       3    -285     -3 |       1     14
sio   uuuuu |      59     -79     -25     135     11 |      32     35

Table 7.1551.4   GPS week: 1551   Day: 4   MJD: 55105.500

                                                         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 |     -36      35      72     -79      1 |      14     19
emr   uuuuu |       2      38     -29      54      4 |      75     76
esa   uuuuu |      42     -51     217     -92    -28 |      29     35
gfz   uuuuu |     -24      61     -53    -105     -1 |      -3     14
grg   xxxxx |    -102       9     -24     -58     18 |     -10     27
igr   xxxxx |     -11      58     139     -89     -8 |       4     16
irf   xxxxx |      18      -3     -12       1      5 |       1     13
jpl   uuuuu |     -48      32      42     -91    -15 |      29     32
mit   uuuuu |       1      -4    -140     131      9 |      15     20
ngs   uuuuu |     -16     -14      -8      29      1 |       0     14
sio   uuuuu |      76     -71     -26     138     17 |      34     37

Table 7.1551.5   GPS week: 1551   Day: 5   MJD: 55106.500

                                                         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 |     -35     -17      20    -199      2 |      12     16
emr   uuuuu |     -14      21    -116      90    -10 |      74     75
esa   uuuuu |      44     -55     107     258     -4 |      27     34
gfz   uuuuu |     -40      46      21    -227     -5 |      -5     13
grg   xxxxx |     -75     -43     208    -252     28 |      -9     28
igr   xxxxx |      -5      29     141    -123    -14 |       2     15
irf   xxxxx |      17      -2     -75     -18      2 |       1     13
jpl   uuuuu |     -50      10     156     -98    -11 |      26     28
mit   uuuuu |      15      24    -321      30      6 |      14     19
ngs   uuuuu |     -18       1     169     -40      3 |      -2     12
sio   uuuuu |      91     -66    -143      14     11 |      35     38

Table 7.1551.6   GPS week: 1551   Day: 6   MJD: 55107.500

                                                         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      12     166    -217      5 |      12     17
emr   uuuuu |      13       1     -31     -78    -20 |      74     75
esa   uuuuu |       1     -51     -81     249     11 |      27     34
gfz   uuuuu |     -34      47      11    -111     -1 |      -5     13
grg   xxxxx |       1      39     108       2     40 |      -4     28
igr   xxxxx |     -29      75     116     -18     -2 |       1     16
irf   xxxxx |      11       2     -36     -34     -4 |       1     13
jpl   uuuuu |     -12       6     203      36     -6 |      24     26
mit   uuuuu |       0      25    -222     -36     -3 |      14     20
ngs   uuuuu |      -3       7     145     -70      3 |      -2     12
sio   uuuuu |      85     -63     -39     -49     -1 |      37     40



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