[IGSREPORT-17875] Wk 1550 IGS Final Orbits

Jim Ray IGS.ACC at noaa.gov
Thu Oct 8 04:50:45 PDT 2009


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IGS Electronic Report   08 Oct 04:50:48 PDT 2009      Message Number 17875
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Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1550   (Sep 20, 2009 - Sep 26, 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:

igs1550[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1550[0-6].clk  IGS GPS satellite and station clocks in SP3 format.
igs1550[0-6].cls  IGS GPS clock combination summary report.
igs15507.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs15507.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   | 24 24
                0  |  EMR   | WTZR
                0  |  ESA   | 24
                0  |  GFZ   | 1 24 BUE1 COCO FAA1 HARB HOFN MAC1 REUN SUTM UNSA
                0  |  GFZ   | ZIMM
                0  |  GRG   | ONSA
                0  |  JPL   | 5 32
                0  |  NGS   | 1
                1  |  ALL   | 1
                1  |  EMR   | 24 24 WTZR
                1  |  GFZ   | 5 24 BRUS FAA1 HARB HOLM KERG KIRU ONSA SFER THU3
                1  |  GFZ   | WSRT
                1  |  GRG   | DAV1 ONSA
                1  |  JPL   | 32 DAV1 POTS
                2  |  ALL   | 1 5
                2  |  COD   | MAS1 XMIS
                2  |  ESA   | MAS1 WTZR
                2  |  GFZ   | 24 CHUR DUBO EIL1 FAA1 HOFN HOLM KIRU NYAL ONSA SFER
                2  |  GFZ   | THU3 WSRT
                2  |  GRG   | KHAJ ONSA
                2  |  JPL   | 32
                2  |  MIT   | 24 24 HARB
                3  |  ALL   | 1 1
                3  |  EMR   | WTZR
                3  |  ESA   | NYAL UNSA
                3  |  GFZ   | 5 24 CAS1 COCO FAA1 HARB ONSA PRE1 RAMO TWTF
                3  |  GRG   | ONSA TWTF
                3  |  JPL   | 32
                3  |  MIT   | 24 24 NYA1
                4  |  ALL   | 1
                4  |  EMR   | WTZR
                4  |  GFZ   | 24 27 CRO1 FAA1 HARB PRE1 RABT ULAB UNSA
                4  |  GRG   | ONSA TWTF
                4  |  JPL   | 32
                4  |  MIT   | 9 24 9 24 HARB MIZU SYDN
                5  |  ALL   | 1
                5  |  COD   | WROC
                5  |  ESA   | MAS1
                5  |  GFZ   | 5 24 ABPO BOR1 DAV1 HARB HOLM IISC NYA1 RABT RAMO
                5  |  GFZ   | THU3 TOW2 TWTF
                5  |  GRG   | COCO DAV1 TWTF WTZR
                5  |  JPL   | DAV1 MDVJ
                5  |  MIT   | MAS1 MAS1
                6  |  ALL   | 1 24
                6  |  EMR   | 24
                6  |  GFZ   | 10 11 COCO DGAR HARB HRAO MIZU PRE1
                6  |  GRG   | ONSA
                6  |  JPL   | 5 32
                6  |  MIT   | 26 HARB

 5. 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
               ----+------------+----------
               G05 | 2009_09_22 | 2009072 
               G10 | 2009_09_25 | 2009074 

 6. 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.

 7. 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  |     .4     .7    1.4      -9     -5    -12    -.32
       EMR  |    2.5   -2.0   -5.5      68      3     52     .09
       ESA  |     .3    2.7    1.6      75    -21     38    -.03
       GFZ  |     .0     .9     .8      18    -14      1    -.22
       GRG  |    5.4    3.2    -.7       1    -43     89     .03
       JPL  |   -1.4    5.6   -6.1       8    -11      3     .15
       MIT  |     .1    -.9    7.8      11      7    -12    -.30
       NGS  |    1.0     .4     .1       4     -6     -8    -.16
       SIO  |    -.2    1.5   -2.9      33    -10      2    -.06


 8. 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.

 9. 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.

10. 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 1.1550.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1550.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 2.1550.[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 3.1550.[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 5.1550.0-6).

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 1550 summary.                       (Sep 20, 2009 - Sep 26, 2009)

Table 1.1550.a   GPS week: 1550   MJD: 55094.000-55100.000

         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  225|    1     0     1    62   -15    -8  -.16    7    7 |      20    -144     14     67
        |    0     0     0     6     7    18   .02           |     564     646
emr   78|    0    -1    -3   -81   -18    -1   .55   20   20 |    1122    -269     18     83
        |    2     4     2    38    14    13   .04           |     507     669
esa  137|    0    -1     1  -107    60   -25   .33    9    9 |   -1232     286     19    117
        |    0     0     2    29    22    11   .03           |     874    1065
gfz  177|    0     0    -1     5   -20   -14  -.16    9    9 |    -113     186     23    104
        |    0     0     1    43    25     6   .02           |     368     976
grg  110|    3     0    -1    58    86    62  1.13   34   34 |      25    -222     74    244
        |    1     1     1    23    24    38   .05           |     254     447
igr  n/a|    0     0     2    50   -23   -18   .08    5    5 |  -10852    -299     18     65
        |    0     1     1    15     9    31   .06           |     563     838
jpl  132|    2     0    -5    19     0    37   .59   17   17 |    1422    -370     17     86
        |    1     1     1    20    17    34   .02           |     533     826
mit  268|   -1     0     0    22   -38    -6  -.28   10    9 |  -14136    -169     20    125
        |    0     0     1    29    14    10   .04           |     663    1287
ngs  216|    0     0     0    40     0    23  -.18    9    7 |   12442    2175   2129   6353
        |    0     0     1    37    22    18   .03           |    2691    3539
sio  246|   -2     1     1   -38    33    37  -.16   20   18 |     ---     ---    ---    ---
        |    0     1     1    26    17     9   .01           |     ---     ---


Table 1.1550.b   GPS week : 1550   MJD: 55094.000-55100.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         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 2.1550.0   GPS week: 1550   Day: 0   MJD: 55094.000                            

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  225|    1     1     0    61    -9   -17  -.19    7    7 |    -987     610     14     67
        |                     -3    13                       |
emr   78|    0     2    -2   -35   -33     5   .50   19   19 |    1173    -295     17     73
        |                    -77    -3                       |
esa  137|    0    -2     3  -101    55   -34   .31    8    8 |    -899   -1008     18    114
        |                     48    10                       |
gfz  177|    1     0    -1   -28   -27   -13  -.17    9    9 |    -677      29     22    110
        |                    -54    24                       |
grg  110|    0     2    -2    23   109    72  1.05   36   35 |    -264    -478     73    246
        |                    -37    15                       |
igr  n/a|    0     0     2    62   -24   -39   .03    4    4 |  -10526    -457     16     56
        |                    -76     5                       |
jpl  132|    2     0    -7    12     4    12   .56   17   17 |    1733    -578     17     77
        |                     -4    48                       |
mit  268|   -1    -1     2     7   -53     9  -.24   12   11 |  -15431    -117     20    111
        |                     -2     4                       |
ngs  216|   -2     0     0    79     6    34  -.21    9    7 |    8466    6698   2264   4590
        |                    -86    37                       |
sio  246|    0     0     2   -48    45    41  -.14   21   20 |     ---     ---    ---    ---
        |                     24   -36                       |

Table 2.1550.1   GPS week: 1550   Day: 1   MJD: 55095.000                            

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  225|    1     0     1    59   -17     4  -.15    7    7 |     244    -576     14     60
        |                    -23    24                       |
emr   78|    0    -3    -2   -54   -38    -1   .53   19   19 |    1195     191     19     82
        |                    -80   -13                       |
esa  137|    0    -1     2  -120    51    -9   .29   10   10 |   -1048    1203     23    118
        |                     42    10                       |
gfz  177|    1     0    -2     0    23   -15  -.16   10   10 |      85    -467     24     99
        |                    -45    -4                       |
grg  110|    4     0    -3    61   101    92  1.11   35   34 |     -37     105     84    234
        |                    -12    41                       |
igr  n/a|    0     0     3    58   -39   -44   .05    4    4 |  -10808     286     20     64
        |                    -22    -4                       |
jpl  132|    1     0    -4     4    -9    20   .60   16   16 |    1236     325     16     70
        |                      2   -18                       |
mit  268|   -1    -1     0    -3   -28   -14  -.24   11   11 |  -14267    2565     19    110
        |                     -8   -13                       |
ngs  216|    0     1    -1    82   -27     0  -.22   10    9 |   12779   -1829   2424   3741
        |                    -65    85                       |
sio  246|   -2     1     0   -66    48    32  -.16   19   20 |     ---     ---    ---    ---
        |                     19   -40                       |

Table 2.1550.2   GPS week: 1550   Day: 2   MJD: 55096.000                            

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  225|    1     1     0    63    -4    -8  -.16    7    7 |    -238    -172     15     64
        |                     12   -26                       |
emr   78|    0    -1    -5   -51   -23   -25   .54   17   17 |    1701    -574     19     81
        |                    -49   -29                       |
esa  137|    0     0     0  -138    87   -19   .33    8    8 |   -2120     348     21    118
        |                     35   -14                       |
gfz  177|    0     1    -1   -27   -54   -24  -.16    9    9 |    -126      48     22    103
        |                    -17    11                       |
grg  110|    4    -2    -1    70   121     6  1.14   36   36 |     128    -427     78    267
        |                     16    -9                       |
igr  n/a|    0     0     2    57   -15   -39   .06    5    5 |  -10318    -383     17     69
        |                    -44    -3                       |
jpl  132|    3     0    -4    40    24    70   .60   17   17 |    1835    -560     17     94
        |                     21   -20                       |
mit  268|   -1     0     1    25   -61    -2  -.27    9    9 |  -14101   -1423     18    111
        |                    -13     1                       |
ngs  216|   -1     0     2    53    10     5  -.17    7    6 |   12510    4212   2188   6869
        |                    -29    -2                       |
sio  246|   -2     1     1   -33    -2    41  -.16   18   18 |     ---     ---    ---    ---
        |                     15    -9                       |

Table 2.1550.3   GPS week: 1550   Day: 3   MJD: 55097.000                            

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  225|    2     0     0    68   -27    25  -.15    8    8 |     339    -776     13     60
        |                     -4    34                       |
emr   78|    0     0    -5   -85    -8     3   .54   19   19 |    1837   -1120     19     85
        |                    -11   -37                       |
esa  137|    0     0     4  -117    40   -24   .33    8    8 |   -2336    -184     18    110
        |                     60    -4                       |
gfz  177|    0     0     0    -3    -6    -3  -.14   10   10 |     -33    2127     23     97
        |                    -51    -7                       |
grg  110|    2     1    -1    74    60   123  1.20   37   38 |     166    -110     80    226
        |                    -15    33                       |
igr  n/a|    1     0     1    41   -12   -24   .05    5    5 |  -10149   -1143     19     62
        |                    -28   -10                       |
jpl  132|    4    -1    -4    29    10    -9   .58   18   18 |    2197   -1131     18     83
        |                    -16   -26                       |
mit  268|   -1    -1    -2    30   -39   -17  -.26    9   10 |  -14081    -283     19    122
        |                    -21    14                       |
ngs  216|   -1     0     1    54     6     8  -.15    8    7 |   16056   -2522   1979   7297
        |                    -23    -5                       |
sio  246|   -2     2     0   -17    43    32  -.17   18   17 |     ---     ---    ---    ---
        |                     -4   -23                       |

Table 2.1550.4   GPS week: 1550   Day: 4   MJD: 55098.000                            

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  225|    0     0     1    55   -15    -7  -.15    7    7 |     737    -760     16     70
        |                     12     4                       |
emr   78|    0     3    -2  -119   -16   -14   .58   20   20 |     761    -136     19     91
        |                     24   -29                       |
esa  137|    0    -1     0   -91    43   -42   .33    8    8 |    -724     663     18    106
        |                     16    15                       |
gfz  177|    0     1    -1    55   -23   -15  -.14    9    9 |     277    -416     21     92
        |                    -49    10                       |
grg  110|    5     1    -1    66    75    54  1.17   32   33 |     255      69     67    252
        |                     49    43                       |
igr  n/a|    0     0     0    37   -20   -29   .05    4    4 |  -11081    -354     16     62
        |                    -43    30                       |
jpl  132|    0    -1    -5     3   -24    22   .60   17   17 |    1332    -262     16    100
        |                     13   -18                       |
mit  268|   -1     0     0    38   -30    -3  -.30    8    8 |  -13666    -557     23    120
        |                    -18     0                       |
ngs  216|    0     0     0    -1    26    30  -.16    8    7 |   15001     984   1988   8931
        |                     35    74                       |
sio  246|   -2     1     2   -28    28    45  -.18   18   17 |     ---     ---    ---    ---
        |                     27   -34                       |

Table 2.1550.5   GPS week: 1550   Day: 5   MJD: 55099.000                            

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  225|    1     0     1    55   -22   -27  -.16    8    8 |     310    -179     15     72
        |                     25    33                       |
emr   78|    1    -8    -3  -140     2     6   .62   24   23 |     530    -836     18     92
        |                     10   -26                       |
esa  137|    0    -1     2  -133    49   -33   .37    9    9 |     177    -895     22    133
        |                     33    27                       |
gfz  177|   -1     1     0    76   -43   -15  -.18   11   11 |     225    -729     27    114
        |                    -35    -9                       |
grg  110|    3     1     0    27    59    32  1.14   32   34 |     291   -1012     71    244
        |                     53    16                       |
igr  n/a|    1     0     0    27   -17    41   .14    5    5 |  -11466   -1240     21     79
        |                    -37    -4                       |
jpl  132|    1     0    -7    -4   -18    66   .62   18   18 |     974   -1395     21    105
        |                      6   -14                       |
mit  268|    0     0     0    74   -20     0  -.33   10    9 |  -14119   -1003     20    138
        |                    -34    -8                       |
ngs  216|    0     1     0   -15    15    34  -.18   10    8 |   12654    2189   2195   9414
        |                    118    74                       |
sio  246|   -2     2     0     0    41    49  -.16   19   18 |     ---     ---    ---    ---
        |                    -10   -29                       |

Table 2.1550.6   GPS week: 1550   Day: 6   MJD: 55100.000                            

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  225|    0     0     2    73   -13   -27  -.15    7    7 |    -265     842     15     76
        |                    -30     1                       |
emr   78|   -4    -3     1   -86   -10    13   .57   19   19 |     662     881     16     81
        |                    -37   -29                       |
esa  137|    0     0    -2   -50    96   -16   .36    9    9 |   -1677    1878     19    125
        |                     19    18                       |
gfz  177|    0     1    -3   -30   -11   -17  -.16    9    9 |    -543     714     24    114
        |                    -16    17                       |
grg  110|    4     0     1    85    77    57  1.13   32   31 |    -360     296     70    240
        |                    -84   -23                       |
igr  n/a|    0    -2     3    69   -32     6   .18    8    8 |  -11617    1198     22     64
        |                    -99   -29                       |
jpl  132|    2    -1    -4    48    12    82   .60   18   18 |     649    1006     15     79
        |                     21   -27                       |
mit  268|    0     0     1   -14   -37   -19  -.33   10    8 |  -13288    -365     25    169
        |                    -11    -1                       |
ngs  216|    0     0     0    32   -33    49  -.14    9    8 |    9633    5496   1867   3633
        |                     38    73                       |
sio  246|   -2     3     2   -73    28    21  -.16   24   20 |     ---     ---    ---    ---
        |                     13   -25                       |

       
       
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 3.1550.0   GPS week: 1550   Day: 0   MJD: 55094.000                            

        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  ---  ---   12  ---   13  ---   15   23  ---   10 |    51  ---  ---   48  ---   62  ---   56   61  ---    52
   2  |    7   18    8    8   42    3   19    8   10   23    4 |    24   31   24   26   59   23   33   23   26   31    24
   3  |    7   16    8    7   15    3   13   10    7   20    3 |    17   27   21   18   28   19   28   19   19   30    18
   4  |    7   17    6    5   34    4   12   11    9   21    4 |    19   32   24   22   37   22   30   22   19   24    21
   5  |    7   19   10   10   42    5   20   18    9   32    5 |     8   21   11    8   19    9   19   12    9   14     6
   6  |    8   16   10    7   19    2   15   11    8   23    4 |    17   30   23   19   32   19   31   21   20   29    19
   7  |    7   24    9   10   28    2   18   11   11   13    4 |    18   34   24   26   40   21   28   23   19   23    21
   8  |    6   12    5   10   31    3   11   12    9   17    3 |    16   25   21   20   28   19   24   20   17   21    17
   9  |    8   19    8    7   29    4   13   15   11   14    4 |    19   32   23   22   27   20   28   25   24   25    22
  10  |    6   14    8    7   37    3   12   13    6   16    3 |    15   24   21   17   18   18   13   19   17   20    17
  11  |    6   17    8   10   37    4   16    7   10   14    4 |    16   28   21   20   44   18   23   21   20   21    18
  12  |    9   17    9   10   29    5   16   15    8   26    4 |    23   32   24   27   41   23   30   27   23   21    23
  13  |    6   17    6    8   45    4   20   13   10   11    4 |    16   26   20   19   44   18   29   22   20   20    18
  14  |    7   21   11    8   26    4   22   14    7   15    4 |    17   31   23   19   41   18   27   23   18   19    18
  15  |   10   16   12   11   26    4   23   16   11   13    5 |    16   31   23   25   35   19   31   23   21   22    20
  16  |    6   19    9   11   27    4   21   10    8   28    5 |    24   36   25   24   40   24   36   25   25   28    24
  17  |    6   25    7   12   26    4   20    7    9   14    4 |    17   40   22   18   41   20   33   21   18   20    19
  18  |    6   17    7   10   28    4   21   10   12   19    4 |    21   33   28   30   37   26   30   29   27   26    25
  19  |    7   25    8   12   34    5   20   10    9   17    4 |    18   35   21   18   32   18   29   19   20   24    19
  20  |    8   18    6    8   74    6   17    7    8   21    4 |    25   30   30   32   49   29   27   29   30   24    27
  21  |    6   20    7   10   25    4   24    8   11   14    4 |    21   34   24   19   38   20   36   22   20   23    21
  22  |    8   19    8    7   30    6   20   18   10   19    4 |    27   39   34   33   38   32   34   36   30   30    30
  23  |    7   28   10    9   32    3   23   12    6   18    5 |    16   35   21   19   34   18   29   21   17   23    17
 X24  |   13   22   13   14  ---   10  ---   17   18  ---    7 |    15   29   26   27  ---   19  ---   22   24  ---    18
  25  |    6   12    6    8  ---    3    9   11   10   21    3 |    14   22   18   20  ---   16   22   17   15   26    15
  26  |    8   16    8    8   25    4   12   15   10   20    4 |    17   32   21   20   34   18   28   23   21   24    18
  27  |    8   18    8    7   31    4   13   14   13   15    4 |    16   31   21   21   27   19   27   24   21   24    20
  28  |    6   18    8    9   70    5   16    9   10   48    5 |    26   38   31   31   59   29   36   27   28   44    27
  29  |    6   24   12    8   23    5   15   15    8   16    4 |    21   30   18   18   24   20   23   24   22   25    18
  30  |    7    9    6    8   25    6    8   13   10   20    3 |    33   33   32   31   41   30   32   36   35   27    31
  31  |    6   22    9   11   39    4   20   16    9   15    4 |    18   28   23   21   48   19   27   23   20   20    19
  32  |    8   18    6    6   54    4   17    9    9   16    4 |    18   22   24   24   41   21   22   21   23   22    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    8    9   36    4   17   12    9   21      |T   19   30   23   23   37   22   28   24   22   24    21
 WRMS |    7   19    8    9   35    4   17   11    7   20      |NE  20   30   23   23   36   22   28   24   22   24    21
 MEDI |    7   18    8    8   30    4   17   12    9   17      |MD  18   31   23   21   38   19   28   23   20   24    19

Table 3.1550.1   GPS week: 1550   Day: 1   MJD: 55095.000                            

        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  ---  ---   18  ---   36  ---   28   28  ---   13 |    83  ---  ---   84  ---   99  ---   80   94  ---    83
   2  |    7   22   12    8   39    4   19   10   10   21    4 |    20   31   24   18   41   21   29   16   20   25    19
   3  |    6   16    9   12   20    3   10    8    9   19    4 |     9   23   16   15   24   12   21   12   12   22    12
   4  |    6   16   10    6   30    4    9    9   11   20    3 |    13   26   20   16   29   16   24   17   20   19    16
  X5  |    7   18    8    9   52    5  ---   14    9   31    5 |     6   20   11    7   19    7  ---   11    7   12     6
   6  |    6   16    9    9   15    3   12   10   10   20    4 |     8   26   17   15   26   12   25   12   12   22    12
   7  |    9   23   11   11   27    5   18   12    9   11    4 |    15   28   18   17   35   14   24   15   17   12    14
   8  |    8   12   11    8   29    4   12    9   12   11    3 |    13   21   17   12   23   13   18   13   17   14    12
   9  |    7   18    8    8   27    3   12   12   11   14    4 |    12   26   18   16   21   17   23   23   20   21    16
  10  |    5   12    8    6   37    4    9   11    6   15    3 |    12   19   19   14   17   14   15   14   15   18    13
  11  |    7   17   10    7   41    3   13    8   10   15    4 |     9   25   16   11   37   10   17   11    9   11     9
  12  |    8   14   10    9   32    5   13   12    9   27    4 |    16   28   19   22   32   18   26   23   21   19    18
  13  |    7   17    9    7   46    6   17   12   10   10    4 |    11   23   13   11   38   12   21   14   10   11    10
  14  |    9   23   11    8   27    4   21   10    8   14    4 |    13   32   17   17   39   15   26   17   14   14    14
  15  |   10   16   11   10   27    5   21   14   10   11    4 |    14   26   18   19   30   16   24   16   17   16    15
  16  |    8   20   12   12   21    4   20   11   12   29    5 |    12   27   20   16   31   15   28   16   19   18    15
  17  |    8   24   11   10   35    4   18    7   10   12    4 |    16   33   16   10   42   14   23   12   14   17    13
  18  |    6   16    9   14   30    5   20   13   11   20    5 |    15   29   21   25   34   18   28   22   21   19    18
  19  |    8   27   12   11   42    4   22    8   10   15    5 |    13   34   18   16   39   15   27   16   17   18    15
  20  |    8   20    9   13   62    5   18    6   12   18    4 |    13   23   19   21   32   17   20   13   18   13    14
  21  |    6   29    9   13   31    5   22    7    9   13    5 |    16   33   19   17   35   15   29   17   19   18    16
  22  |    8   18   11    9   36    5   19   16    9   19    5 |    20   32   25   25   41   23   32   28   22   23    22
  23  |    7   23   10   12   33    4   20   11    8   17    5 |    11   28   15   16   35   12   23   15   11   16    11
 X24  |   15   20   19   18  ---   16  ---   15   19  ---    7 |    16   16   30   31  ---   20  ---   21   33  ---    20
  25  |    5   13    8   11  ---    3    9   11    7   20    3 |     9   16   12   15  ---   11   18   12   15   20    10
  26  |    8   21   13   10   25    3   10   12    9   18    4 |    15   33   17   22   27   16   24   23   18   20    17
  27  |    7   16    7    8   34    3   13   13    8   14    4 |    11   25   17   14   25   16   22   19   15   19    14
  28  |    6   18    9    9   56    4   19   10   12   45    6 |    16   30   21   17   37   18   29   13   13   42    15
  29  |    5   18   11   10   25    8   16   14   12   15    4 |    19   25   17   20   20   19   23   22   17   23    17
  30  |    7   11    9    7   30    3    7   12    7   21    3 |    23   25   25   24   24   22   24   26   27   17    23
  31  |    7   21   16   10   47    4   16   11   11   16    4 |    13   26   18   16   45   15   24   15   14   15    14
  32  |    9   17   10    9   40    3   14    7   10   16    4 |    12   20   19   16   25   15   18   16   16   18    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19   10   10   35    4   16   11   10   19      |T   15   26   18   19   31   18   23   18   19   18    16
 WRMS |    7   19   10   10   34    4   16   11    9   20      |NE  15   26   18   19   30   18   23   19   19   18    17
 MEDI |    7   18   10    9   32    4   16   11   10   16      |MD  13   26   18   16   32   15   24   16   17   18    14

Table 3.1550.2   GPS week: 1550   Day: 2   MJD: 55096.000                            

        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  |   26  ---  ---   16  ---   17  ---   13   24  ---   12 |    46  ---  ---   45  ---   54  ---   51   56  ---    45
   2  |    6   17    8   10   38    4   22    9    7   22    4 |    20   30   24   22   44   20   31   21   20   29    21
   3  |    6   16    7    6   20    4   12    9    7   19    3 |    14   25   23   16   26   15   24   16   17   27    17
   4  |    8   13   11    8   40    5   12   11    8   20    4 |    16   26   21   20   31   15   24   17   19   16    17
  X5  |    7  ---   11  ---  ---  120  ---  ---  ---  ---    9 |    18  ---   12  ---  ---  163  ---  ---  ---  ---    25
   6  |    8   16   10    7   22    4   13   10    7   19    4 |    14   26   23   16   28   15   26   16   18   25    17
   7  |    7   19    7   10   28    6   18   11    9   11    4 |    17   28   20   20   35   19   25   18   20   17    18
   8  |    7   12    5    9   32    6   11    8    5    9    3 |    14   21   19   16   26   15   20   16   15   15    15
   9  |    8   18    8    9   30    5   14    8    8   11    3 |    14   27   20   19   26   18   22   20   19   20    17
  10  |    6   14   10    7   50    5   10   10    8   13    3 |    15   21   24   18   22   19   10   17   18   16    17
  11  |    7   15    7    8   43    5   14    9    7   12    3 |    12   25   19   19   38   15   17   17   14   16    15
  12  |    9   16    8    8   36    7   16    7    8   25    4 |    18   30   22   23   39   20   26   20   20   20    19
  13  |    8   18    9    7   43    5   19    9    9   10    4 |    14   26   18   17   44   14   24   16   15   16    14
  14  |    5   17   10    7   33    4   20    7    6   13    3 |    14   26   19   17   42   15   24   17   18   15    15
  15  |   10   17   10    7   33    4   24   13   11   13    4 |    15   27   21   15   34   15   28   18   17   18    16
  16  |    6   18   11   13   33    3   17   10    6   27    4 |    19   33   27   21   37   20   30   22   20   21    21
  17  |    6   18    8   11   22    5   19    6    5   11    3 |    15   27   14   13   32   14   25   16   18   20    15
  18  |    6   19    7   11   27    5   20   12    8   20    4 |    18   29   25   25   36   19   26   22   19   20    19
  19  |    6   29    8    8   40    3   22    9    8   15    4 |    18   37   21   17   37   18   29   16   23   22    20
  20  |    6   18    8    9   59    5   17    7    6   18    4 |    21   27   27   24   34   24   23   24   28   19    23
  21  |    4   21    9    8   27    3   20    8    7   13    4 |    18   30   18   17   37   18   27   19   18   19    18
  22  |    6   18    5    9   27    5   18   12    6   18    4 |    21   29   26   25   37   22   27   27   23   21    22
  23  |    8   23    9    9   37    4   21   10    8   18    4 |    13   29   17   14   36   13   25   16   15   19    13
 X24  |   20   19   18   24  ---   11  ---   13   17  ---    8 |    16   20   27   31  ---   19  ---   22   28  ---    19
  25  |    7   12   10    6  ---    6   11    9    8   19    3 |    12   21   17   15  ---   14   21   15   16   21    14
  26  |    8   14    7   12   21    4   12    9    6   17    3 |    16   24   20   24   29   17   24   23   21   18    19
  27  |    9   17    7   10   37    4   15    8    7   10    3 |    13   26   20   19   27   17   22   20   18   21    17
  28  |    7   18    9    8   56    6   17    8    7   43    5 |    19   31   28   22   39   21   27   20   20   43    20
  29  |    7   21    8   10   25    6   16   10    9   15    4 |    20   28   17   23   22   20   22   22   21   22    18
  30  |    8   11    5    7   32    5    7    8    4   18    3 |    26   29   28   28   28   25   26   29   26   21    26
  31  |    6   16   12   10   43    5   17    8    9   16    4 |    16   25   21   19   51   15   25   18   18   17    16
  32  |    8   14    7    7   43    4   16    8    5   16    3 |    16   23   22   22   28   17   20   18   22   19    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   17    8    9   36    5   17    9    7   18      |T   17   26   21   20   33   23   24   20   20   20    18
 WRMS |    7   17    8    9   36    5   17    9    6   18      |NE  17   26   21   20   33   23   24   20   20   20    19
 MEDI |    7   17    8    9   33    5   17    9    7   16      |MD  16   27   21   19   34   18   25   18   19   20    18

Table 3.1550.3   GPS week: 1550   Day: 3   MJD: 55097.000                            

        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  |   20  ---  ---   15  ---   27  ---   13   27  ---   11 |    56  ---  ---   57  ---   70  ---   63   73  ---    61
   2  |    5   23    9    9   40    4   19   10    7   20    4 |    18   31   16   20   42   18   28   19   21   27    19
   3  |    9   16   10    8   17    4   13   11    9   19    4 |    15   25   21   17   24   15   27   17   17   25    17
   4  |    8   13    7    9   42    5   12   10   10   14    3 |    18   27   22   26   30   18   27   21   22   18    20
  X5  |    7  ---    8    9  ---    7  ---   10   10   26    5 |     7  ---   12   10  ---   29  ---    8   12   14     8
   6  |   10   17    9    8   16    4   14   10    8   17    4 |    15   29   22   18   26   16   28   18   18   26    18
   7  |   10   22    8    8   25    5   19    6    8   11    4 |    18   30   23   24   36   20   30   23   22   22    21
   8  |    7   11    7    7   23    6   12   11    6    7    3 |    15   20   20   18   29   19   22   19   19   18    17
   9  |    8   19    7    9   29    4   14    9    7   11    3 |    18   29   21   21   26   19   25   21   23   21    20
  10  |    6   13    7    7   55    5   13    9    8   13    3 |    13   17   19   15   20   14   13   14   17   16    15
  11  |    8   18    9    8   47    5   19    9    7   12    4 |    13   25   19   19   37   16   21   19   20   21    17
  12  |   11   17    8    8   35    5   18   12   10   28    5 |    23   32   25   27   40   23   31   27   24   24    23
  13  |    8   20    8    7   44    6   18    9    7    8    3 |    15   29   21   19   48   17   27   19   18   18    16
  14  |    5   18   10    6   32    4   21    8    6   14    4 |    16   28   24   16   43   18   29   18   21   18    18
  15  |   10   22    7    9   41    4   19   12    9    8    4 |    15   28   22   20   41   18   26   20   18   21    18
  16  |    8   18    9   13   47    4   20   10    7   27    5 |    21   32   23   23   47   23   34   25   24   24    23
  17  |    6   22    9   10   23    4   25    8    8   11    4 |    19   33   22   21   36   19   35   22   20   25    20
  18  |    6   20    9   13   22    4   24   11    9   19    5 |    19   30   28   30   34   23   31   23   21   20    22
  19  |    8   28    9   10   42    3   23    8   10   15    4 |    16   33   22   20   34   18   31   18   21   22    19
  20  |    9   21    8    9   65    5   20    6    8   17    4 |    23   31   33   33   37   26   29   28   33   21    27
  21  |    4   20    7   13   22    4   21    7    7   13    4 |    19   33   22   17   34   19   31   21   21   24    20
  22  |    5   17    7    9   30    4   20   10    8   16    4 |    25   33   31   30   34   27   35   29   27   24    27
  23  |    8   26    7   11   32    5   20    9    6   18    4 |    15   31   21   19   35   17   29   18   20   24    17
 X24  |   18   19   15   20  ---    9  ---    6   15  ---    7 |    18   24   23   29  ---   19  ---   20   32  ---    19
  25  |    7   14   11   10  ---    5   12    8    9   19    4 |    13   23   21   20  ---   17   24   19   20   23    17
  26  |    8   18    8   11   18    4   13   10    7   18    4 |    17   28   17   21   29   17   28   20   18   19    17
  27  |   10   19    9   10   31    6   15    9    9   11    4 |    14   27   21   19   29   18   24   19   21   21    17
  28  |    7   18    8   12   64    5   20    8    8   42    5 |    22   33   25   26   51   24   34   24   22   45    23
  29  |    6   18    9    8   22    5   17    9    6   13    3 |    22   26   19   21   25   20   29   23   20   24    20
  30  |    6   10    6    7   25    2   10    7    7   18    3 |    28   30   30   30   32   27   30   33   31   26    29
  31  |    7   23    8    8   39    5   19   11    8   14    4 |    18   31   21   19   49   19   30   18   21   19    19
  32  |    9   16    8   11   39    6   15    7    6   15    4 |    19   22   29   28   27   21   24   22   25   20    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    8   10   37    5   18    9    8   18      |T   18   28   22   22   34   21   28   22   23   22    20
 WRMS |    8   19    8   10   38    5   18   10    7   17      |NE  19   28   22   23   34   21   28   22   23   22    20
 MEDI |    8   18    8    9   32    5   19    9    8   15      |MD  18   29   22   20   34   19   29   20   21   21    19

Table 3.1550.4   GPS week: 1550   Day: 4   MJD: 55098.000                            

        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  ---  ---   17  ---   23  ---   11   18  ---    9 |    37  ---  ---   28  ---   43  ---   29   37  ---    32
   2  |    6   17   10    9   35    4   19    8    6   23    4 |    15   24   13   13   40   15   24   14   15   22    14
   3  |    6   14    8    9   31    4   13   10    7   19    3 |    13   24   19   18   27   17   25   14   17   25    15
   4  |    6   15   10    7   35    4   10    8    9   15    3 |    22   29   22   22   28   20   28   24   21   24    22
  X5  |    7   21   11   10   41    4  ---    7   12   29    5 |     7   22   15   10   27   17  ---    8   17   11    11
   6  |    7   16    6    8   25    4   12   10    6   18    3 |    13   24   19   17   26   17   26   13   14   25    15
   7  |    8   21    8    9   28    4   17    6    9   12    4 |    15   29   21   19   35   16   25   18   16   17    16
   8  |    7   14    8    7   27    5   12   11    7    7    3 |    10   18   14   14   26   11   18   14   14   11    11
   9  |    8   31    5    8   23    5   12    8    7   13    4 |    12   34   15   17   23   15   23   17   14   20    14
 X10  |    5   15    9    9  ---    4  ---    7    9   15    3 |    15   26   24   19  ---   18  ---   18   23   17    17
  11  |    7   17    7    9   31    5   14    8    6   14    3 |    15   26   20   16   35   14   20   15   16   16    15
  12  |   10   16    8   11   41    4   16    8    7   28    4 |    16   28   20   20   38   20   28   20   14   23    17
  13  |    6   19    7    8   42    4   19    7    8    8    3 |    12   25   17   13   40   14   24   14   16   13    13
  14  |    5   19    7    7   33    5   18    8    5   15    3 |    12   26   18   14   43   14   24   11   14   12    12
  15  |    8   22   11    6   36    4   24   11    9   10    4 |    12   23   17   17   36   14   26   17   14   19    14
  16  |    8   20    7   12   37    3   18   11    9   27    4 |    18   29   20   19   37   21   29   18   18   18    17
  17  |    4   20    5    8   23    4   21    7    6   11    3 |    15   29   15   14   35   14   27   18   18   19    16
  18  |    7   21    8   13   24    4   19    7    7   19    4 |    15   30   22   23   31   19   26   18   22   15    18
  19  |    6   29    9   10   29    4   20    8    9   16    4 |    14   32   17   15   28   15   25   13   15   17    13
  20  |    7   18    6   11   49    5   19    8   10   18    4 |    23   30   24   27   32   24   28   28   26   23    24
  21  |    6   23    8   12   22    2   21    6   10   12    4 |    13   30   17   14   32   16   28   16   24   19    16
  22  |    8   18    6    9   20    5   18    8    6   18    4 |    22   31   25   25   36   22   30   22   23   18    22
  23  |    7   26    8   11   32    4   19    7    8   17    4 |    11   30   18   17   37   15   25   15   20   19    14
 X24  |   11   19    9   20  ---   10  ---   16   28  ---    8 |    14   23   18   25  ---   19  ---   20   42  ---    17
  25  |    5   13    7    8  ---    5   11    8    6   19    3 |     9   17   15   12  ---   11   18   13   13   19    10
  26  |   10   18    7   12   21    5   11    9    7   18    4 |    13   28   16   17   29   15   24   17   15   14    14
  27  |    9   27    6    7   28    5   14    8    9   14    4 |    11   30   16   16   25   15   24   16   15   20    14
  28  |    7   19    7   10   57    6   18   10   11   42    5 |    15   30   21   20   43   19   28   20   22   43    18
  29  |    6   21    9   10   23    6   18    6    8   14    4 |    22   25   15   20   28   20   24   21   20   25    18
  30  |    6   12    6    9   27    3    8   10    7   18    3 |    20   25   24   28   39   22   24   28   21   21    22
  31  |    5   26   11    8   33    3   16   10   10   15    4 |    14   30   18   14   44   15   24   14   15   14    14
  32  |    7   18    6   10   31    5   12    7    9   16    3 |    14   21   20   20   21   17   21   16   16   18    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   20    8    9   32    4   17    8    8   18      |T   15   26   18   18   32   17   24   17   18   19    16
 WRMS |    7   20    8    9   33    4   17    8    7   17      |NE  15   26   18   18   32   17   25   17   19   19    16
 MEDI |    7   19    8    9   31    4   17    8    8   16      |MD  14   28   18   17   32   16   25   17   16   19    15

Table 3.1550.5   GPS week: 1550   Day: 5   MJD: 55099.000                            

        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  |   15  ---  ---   21  ---   40  ---   13   17  ---    9 |    48  ---  ---   48  ---   52  ---   45   47  ---    46
   2  |    8   27   10   15   34    5   25   11    7   21    5 |    14   31   15   13   37   14   29   15   15   22    13
   3  |    6   17   12    8   20    4   14   11    8   23    4 |    10   22   17   12   21   12   22    9   15   28    11
   4  |    7   18    9   10   27    6   11    9    8   12    3 |    15   27   25   22   27   15   24   21   21   23    18
   5  |    8   32   12   15   38    5   22    8   12   30    6 |     8   35   18   13   22   17   21    7   14   17    11
   6  |    6   19    8    7   20    4   14   11    8   24    4 |     9   23   18   11   24   11   23    9   16   30    12
   7  |    8   22    8   11   28    5   18    7   10   12    4 |    12   27   20   15   34   13   22   13   15   12    13
   8  |    8   17    8   10   41    4   11   12    8    9    3 |     9   19   18   12   25   10   18   11   11   10    11
   9  |    9   28    8    9   24    4   14   11    8   14    4 |    13   33   21   19   22   15   22   14   14   19    15
 X10  |    4  ---  ---  ---  ---   16  ---  ---  ---  ---    0 |    10  ---  ---  ---  ---    6  ---  ---  ---  ---    11
  11E |    6   14    7    8   28    4   15    8   11   14    3 |    14   24   19   14   38   13   20   15   18   20    14
  12  |    9   21   10   12   27    3   16    9    7   28    5 |    13   30   22   22   29   16   24   16   14   17    15
  13  |    9   26    7    8   29    5   20    9   13    7    4 |    11   29   17   15   39   14   22   13   13   11    11
  14  |    7   21    9    7   23    4   20    9   10   15    4 |    13   28   19   14   33   16   24   13   18   15    14
  15  |    8   39    8   10   34    8   21   13    9   12    5 |    13   46   19   17   33   17   27   18   16   23    16
  16  |    8   22   13   14   29    7   20   12   10   28    5 |    13   30   23   17   29   15   27   15   16   15    15
  17  |    7   22    7    9   23    4   19    7   12   13    4 |    12   30   14   13   34   14   24   15   18   18    13
  18  |    8   29    8   16   23    7   20    8    7   20    5 |    12   33   22   23   35   17   24   15   17   13    15
  19  |    6   26   11    7   29    4   20    6    9   18    4 |    13   31   14   14   32   10   23   10   12   17    11
  20  |    7   20    7    9   67    6   21    7   12   17    4 |    20   29   26   23   36   21   23   23   21   17    20
  21  |    6   31    8   14   23    6   24    8   14   12    5 |    14   35   13   12   29   15   28   17   25   20    13
  22  |    5   20    6   12   21    6   19    7    8   18    4 |    16   28   23   24   34   21   27   19   23   16    19
  23  |    7   28    8    9   30    5   21    9   10   15    4 |    10   31   19   14   30   14   23   13   13   19    12
 X24  |   20   39   14   30  ---   19  ---   23   21  ---   10 |    11   37   16   31  ---   26  ---   33   35  ---    18
  25  |    6   18   10    8  ---    6   11   11   11   18    4 |     8   20   19   13  ---   12   19   11   11   18    10
  26  |    9   20    8   10   20    5   11   10    8   19    4 |    14   28   16   17   24   17   23   20   17   17    16
  27  |    9   28    8   10   22    4   15   12    6   15    4 |    12   36   24   19   23   17   22   15   10   22    16
  28  |    6   20   10   11   65    5   17    8   10   45    5 |    13   30   22   18   36   17   26   18   15   44    15
  29  |    7   27    8   12   27    5   19    8   12   12    4 |    17   29   16   20   25   15   21   19   21   21    16
  30  |    9   19    6    8   22    7   11   14    8   18    4 |    20   23   22   23   26   20   20   27   17   20    19
  31  |    7   25   13   12   42    6   16   12    9   14    4 |    13   27   24   16   47   15   24   15   14   13    13
  32  |    8   17    9   10   31    5   15    8    8   16    4 |    12   22   23   18   21   16   18   13   13   15    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   24    9   11   32    5   18   10   10   19      |T   13   29   19   18   30   16   23   16   17   19    15
 WRMS |    8   23    9   11   34    5   18    9    8   18      |NE  13   29   19   18   29   16   23   16   17   19    15
 MEDI |    7   22    8   10   27    5   18    9    9   16      |MD  13   29   19   17   29   15   23   15   16   18    14

Table 3.1550.6   GPS week: 1550   Day: 6   MJD: 55100.000                            

        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  |   11  ---  ---   13  ---   16  ---   13   17  ---    8 |    42  ---  ---   43  ---   52  ---   46   47  ---    43
   2  |    8   17    9    8   30    8   22   13    8   24    4 |    21   27   20   23   45   19   27   23   21   30    20
   3  |    6   17    9   10   22    7   13    7    8   22    4 |    20   29   24   23   26   23   31   20   24   30    21
   4  |   13   15   15   10   29   13   16   27    8   65    8 |    52   64   57   60   46   50   57   67   53   85    57
   5  |    8   18    8   11   29    8   20    9    8   37    5 |     7   21   15   11   23   18   20   10   15   25    10
   6  |    7   17    8    9   19    6   16    5    6   23    3 |    19   31   26   22   27   23   33   21   23   32    21
   7  |    8   22    8    8   27    9   19    6    9   13    4 |    21   32   26   22   35   21   30   21   25   21    22
   8  |    8   15    7    7   31    8   11   10    7   11    3 |    16   21   22   17   26   18   25   20   20   17    17
   9  |    7   23    6    8   23    6   13   10    9   14    4 |    17   31   19   17   27   17   25   18   18   17    16
 X10  |    7   13    7    5   27    7  ---    7    8   15    3 |     8    9    7    4    9    6  ---    4    5    3     8
  11E |    7   14    6   10   31    5   15    7   10   21    3 |    19   24   20   18   36   18   23   17   20   21    17
  12  |    8   15    9    9   40    7   17    8   12   26    4 |    26   34   28   26   45   26   32   26   22   23    24
  13  |    6   21    8    6   36    8   22   10   10    7    4 |    18   31   22   18   45   20   32   20   19   19    18
  14  |    6   17    9    8   20    6   23    6    8   14    4 |    17   25   22   19   35   16   27   17   19   19    17
  15  |    8   19   10    8   31    7   23   15   11   10    4 |    17   28   20   21   39   19   31   24   21   23    19
  16  |    6   17   10    8   35   10   19   13    8   30    4 |    24   35   26   25   38   26   37   27   26   28    25
  17  |    7   24   10   11   22   11   23    6   10   19    4 |    21   36   22   19   32   22   32   23   26   29    22
  18  |    6   28   10   13   30    7   20    7   11   22    5 |    19   38   27   29   39   24   28   23   23   20    22
  19  |    6   25    9    9   28    8   20    7    6   20    4 |    21   34   22   22   33   23   31   20   24   26    21
  20  |    7   21    7   12   67    7   22    8   12   19    4 |    29   36   32   37   45   31   31   33   32   30    30
  21  |    7   20    7   12   22    9   23    5   11   12    4 |    23   37   26   21   33   23   37   23   23   28    22
  22  |    6   16    9   10   25    8   19    6   11   19    4 |    24   32   31   30   33   28   31   28   28   25    26
  23  |    7   28   10   11   32    8   24    8   10   16    5 |    18   36   22   19   37   23   33   20   22   23    19
 X24  |   14   27   12   32  ---   25  ---   15   18  ---    9 |    19   26   25   32  ---   22  ---   22   33  ---    21
  25  |    5   17    6    5  ---    8   12   10    8   19    3 |    16   20   21   17  ---   15   24   20   22   24    17
  26  |    9   17   10   14   23    7   11    9   11   19    4 |    16   28   22   24   28   17   25   21   20   19    17
  27  |    8   21    7    5   26    7   13   13    9   15    4 |    16   30   20   18   32   16   25   20   20   19    16
  28  |    7   20    8    9   56   12   18   11    9   46    5 |    24   34   27   26   48   26   34   28   25   51    25
  29  |    5   21   10   10   29    7   19    8   11   16    4 |    28   34   24   25   29   27   33   29   30   32    27
  30  |    6   12    7    4   26    7   12    9    8   22    3 |    33   34   35   32   36   31   34   35   35   27    32
  31  |    5   20   10    9   35   11   17   13   12   14    4 |    18   30   23   18   44   20   26   22   24   21    19
  32  |    7   16    9   11   30    6   16    8    9   15    4 |    19   21   22   23   26   20   21   17   19   21    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    9    9   32    8   18   10    9   24      |T   21   30   24   23   34   23   30   23   24   26    22
 WRMS |    7   19    9    9   31    8   18    8    8   20      |NE  21   30   24   23   34   23   30   24   24   26    22
 MEDI |    7   18    9    9   29    8   19    8    9   19      |MD  19   31   22   22   35   22   31   21   23   23    21



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 4.1550   GPS week: 1550   MJD: 55094.0-55100.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3044 |U    8     8    19 |U    5     7    21 |U    7     7    15 |
emr | emr 2929 |     9    11    22 |U    7     8    23 |    10     9    24 |
esa | esa 2948 |     8     8    21 |U    5     7    19 |     7     7    17 |
gfz | gfz 3041 |U    8     9    22 |U    6     7    21 |     7     7    17 |
grg | grg 2729 |     8     8    23 |U    6     8    26 |    10     9    26 |
igr | igr 2967 |     8     8    20 |     5     7    19 |     8     7    17 |
igs | igs 2933 |     8     8    20 |     5     6    19 |     8     7    17 |
jpl | jpl 2783 |U    9     9    22 |U    6     7    23 |U    9     8    26 |
mit | mit 3044 |U    8     7    20 |U    6     7    22 |U   13     9    21 |



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 5.1550.0   GPS week: 1550   Day: 0   MJD: 55094.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3050 |     6     8    14 |     5     6    19 |     8     7    14 |
emr | emr 2970 |     7     6    15 |     6     8    22 |    10     6    19 |
esa | esa 2976 |     6     6    17 |     4     6    16 |     8     6    13 |
gfz | gfz 3071 |     5     6    15 |     4     7    19 |     8     9    17 |
grg | grg 2784 |     7     6    17 |     5     9    25 |    12     9    28 |
igr | igr 2953 |     5     5    14 |     4     5    17 |     7     6    12 |
igs | igs 2984 |     6     6    15 |     4     5    17 |     8     5    13 |
jpl | jpl 2879 |     6     6    18 |     5     6    21 |    10     6    24 |
mit | mit 3072 |     5     7    15 |     4     7    18 |     9     6    19 |

Table 5.1550.1   GPS week: 1550   Day: 1   MJD: 55095.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3054 |     7     8    17 |     6     7    19 |     8     8    13 |
emr | emr 2961 |    10    16    22 |     8     9    24 |     7    10    21 |
esa | esa 2976 |     7     9    19 |     5     6    15 |     6     7    14 |
gfz | gfz 3063 |     6     9    19 |     6     7    16 |     7     8    14 |
grg | grg 2784 |     7     9    19 |     7     7    25 |     9    13    20 |
igr | igr 2977 |     6    10    17 |     6     7    16 |     6     7    15 |
igs | igs 2976 |     7     9    17 |     5     6    15 |     7     7    14 |
jpl | jpl 2784 |     8    11    21 |     6     7    20 |     8     9    21 |
mit | mit 3072 |     6     7    16 |     5     6    17 |     7     9    14 |

Table 5.1550.2   GPS week: 1550   Day: 2   MJD: 55096.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2961 |    10     7    18 |     5     8    29 |     6     7    13 |
emr | emr 2874 |    12     9    23 |     8     6    30 |     9     7    26 |
esa | esa 2880 |    10     7    23 |     5     8    29 |     7     5    15 |
gfz | gfz 2974 |    10     7    19 |     6     7    30 |     6     5    15 |
grg | grg 2688 |    11     9    24 |     7     7    34 |     9     6    28 |
igr | igr 2870 |    10     7    21 |     6     7    29 |     7     5    17 |
igs | igs 2873 |    10     7    19 |     6     7    28 |     7     5    16 |
jpl | jpl 2784 |    10     7    19 |     7     6    27 |     9     7    28 |
mit | mit 2976 |    10     7    20 |     6     7    30 |    29     8    18 |

Table 5.1550.3   GPS week: 1550   Day: 3   MJD: 55097.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3067 |     9     7    21 |     5     6    23 |     7     7    18 |
emr | emr 2877 |    11     8    27 |     7     6    27 |    10    10    31 |
esa | esa 2976 |     8     8    23 |     6     6    20 |     8     7    23 |
gfz | gfz 3072 |    10     7    22 |     6     6    24 |     7     8    21 |
grg | grg 2688 |     8    11    27 |     7     7    28 |    10     8    33 |
igr | igr 3023 |     9     7    22 |     6     6    22 |     8     8    22 |
igs | igs 2973 |     8     6    22 |     5     6    21 |     8     7    21 |
jpl | jpl 2784 |    10     7    26 |     8     7    26 |    10     8    30 |
mit | mit 3072 |     7     7    21 |     6     6    21 |    17    10    27 |

Table 5.1550.4   GPS week: 1550   Day: 4   MJD: 55098.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3064 |    11     8    24 |     5     8    19 |     8     6    22 |
emr | emr 2975 |    12    14    21 |     6     9    21 |    11     9    29 |
esa | esa 2976 |    11     8    23 |     5     8    17 |     9     6    23 |
gfz | gfz 3071 |    11    10    23 |     5     7    16 |     8     6    22 |
grg | grg 2688 |    12     7    23 |     6    11    26 |    13    10    30 |
igr | igr 3030 |    11     9    24 |     5     7    15 |     9     6    22 |
igs | igs 2976 |    11     8    23 |     5     7    18 |     9     6    25 |
jpl | jpl 2688 |    12    10    24 |     6     9    22 |    11     7    31 |
mit | mit 3072 |    12     7    25 |     5     8    21 |     9     6    24 |

Table 5.1550.5   GPS week: 1550   Day: 5   MJD: 55099.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3053 |     7     8    16 |     6     6    17 |     7     8    13 |
emr | emr 2878 |     7    13    21 |     5    10    18 |     9    10    19 |
esa | esa 2880 |     6     8    16 |     5     7    14 |     7     7    16 |
gfz | gfz 2975 |     9    12    26 |     6     7    17 |     7     7    15 |
grg | grg 2688 |     6     6    21 |     6     7    20 |    10     9    22 |
igr | igr 2937 |     6     9    16 |     5     7    13 |     7     7    15 |
igs | igs 2871 |     6     8    16 |     5     7    16 |     7     7    14 |
jpl | jpl 2784 |     8    11    22 |     5     7    21 |     8     9    22 |
mit | mit 2976 |     5     5    17 |     6     7    16 |     9     7    17 |

Table 5.1550.6   GPS week: 1550   Day: 6   MJD: 55100.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3060 |     7    10    24 |     6     9    19 |     9     9    14 |
emr | emr 2969 |     8    13    29 |     6     7    22 |    12    13    22 |
esa | esa 2976 |     7     9    26 |     6     7    21 |     9     9    14 |
gfz | gfz 3067 |     8    10    27 |     7     7    27 |    10     9    16 |
grg | grg 2784 |     8     7    28 |     6     9    26 |    10    10    20 |
igr | igr 2985 |     7     9    27 |     6     7    23 |     9     9    16 |
igs | igs 2880 |     7     9    25 |     6     6    19 |     8     8    14 |
jpl | jpl 2784 |     8    10    27 |     6     7    26 |    10    11    26 |
mit | mit 3072 |     8    10    27 |     8    10    28 |    15    18    30 |


Table 6: Earth Orientation Parameters weekly summary.                          
                                                                              
        Weekly mean and standard deviation of Centre ERP, ERP rates and       
        LOD differences with respect to IGS combined values. See Table 7 for  
        the daily summaries.                                                  
                                                                              
        Xpole,Xrt: x pole and x pole rate                          
        Ypole,Yrt: y pole and y pole rate                       
        LOD      : Length Of Day                                               
                                                                              
        AC LOD BIAS    : 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 6.1550   GPS week: 1550   MJD: 55094.500-55100.500

                                                         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      -2      78      -7      8 |       4     12
            |      22      18      53      51      4 |       3
emr   uuxuu |      31      28     168      28      6 |      63     64
            |      10      31     225      81      6 |       3
esa   uuuuu |      -2     -40      31     109     -6 |      24     26
            |       8      26      94     120      9 |       2
gfz   uuuuu |       1      34      -4     -55      1 |      -5      9
            |      12      16      54      37      1 |       2
grg   xxxxx |      -9       1      64       1      3 |       6     34
            |      27      45      64      58     36 |       5
igr   xxxxx |       9      46      88      26     -2 |       2      9
            |      18      32      53      50      5 |       2
irf   xxxxx |       7      -4     -17      14      1 |      -3      9
            |      10      14      28      29      3 |       2
jpl   uuuuu |      18     -10      53     108     10 |      20     24
            |      24      15      65      68      6 |       4
mit   uuuuu |       8      12    -204     -33      4 |      10     13
            |      16      23      85      45      1 |       3
ngs   uuuuu |     -41      -2     170     -29     -5 |       7     12
            |      31      56     104     130      1 |       2
sio   uuuuu |      35     -16     -86    -155     -8 |      36     38
            |      18      24      70      70      7 |       2


Table 7.1550.0   GPS week: 1550   Day: 0   MJD: 55094.500

                                                         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     -18      95       8      1 |       0      8
emr   uuxuu |      19      56    -152     -83     -5 |      58     59
esa   uuuuu |       6     -69      55     -54    -10 |      23     25
gfz   uuuuu |      -8      33      18    -115      1 |      -7      9
grg   xxxxx |       1      16      95     -66     74 |      -2     28
igr   xxxxx |      11      55      42     -55      2 |      -1      8
irf   xxxxx |      16     -21     -21      32     -3 |      -7     11
jpl   uuuuu |     -32     -17     -19     168      0 |      14     18
mit   uuuuu |      12     -19    -218      26      4 |       5      9
ngs   uuuuu |     -21      65     174     116     -3 |       5     10
sio   uuuuu |      52     -45    -126     -13    -17 |      35     37

Table 7.1550.1   GPS week: 1550   Day: 1   MJD: 55095.500

                                                         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 |     -17       4     160      -3     12 |       1      8
emr   uuxuu |      20      61     -40     -31      3 |      59     60
esa   uuuuu |      -3     -61     179     221    -20 |      23     26
gfz   uuuuu |      11      26       8     -54     -1 |      -7      9
grg   xxxxx |     -34      -7      59       1    -32 |       6     38
igr   xxxxx |      11       3      99     -14     -6 |       0      9
irf   xxxxx |       7     -19     -26      24     -3 |      -5     10
jpl   uuuuu |      25     -21     145      38     17 |      15     19
mit   uuuuu |      20     -11    -314     -41      5 |       7     11
ngs   uuuuu |     -78      46     127     -51     -5 |       6     11
sio   uuuuu |      47     -38    -171    -160    -13 |      36     38

Table 7.1550.2   GPS week: 1550   Day: 2   MJD: 55096.500

                                                         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 |      20     -18      84      32      8 |       4     13
emr   uuxuu |      23      43      60     -27      3 |      62     63
esa   uuuuu |       8     -41      -4     143      1 |      23     26
gfz   uuuuu |     -17      11      91     -67      1 |      -5      9
grg   xxxxx |       3     -22     144      62    -28 |       7     38
igr   xxxxx |      -3      38     194      61     -7 |       3      9
irf   xxxxx |      -6      -6     -17     -42     -1 |      -4     10
jpl   uuuuu |      14     -27       3     199     14 |      19     24
mit   uuuuu |      -7       7    -239    -103      4 |       9     14
ngs   uuuuu |      -4      23     167       8     -7 |       8     12
sio   uuuuu |       3     -21    -115    -197    -11 |      38     39

Table 7.1550.3   GPS week: 1550   Day: 3   MJD: 55097.500

                                                         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 |     -41      -3      86      -6     13 |       5     14
emr   uuxuu |      30       4     219      10      9 |      64     65
esa   uuuuu |      -3     -67      59     -32      8 |      25     27
gfz   uuuuu |       0      44       0     -31      0 |      -4      8
grg   xxxxx |     -40       8      43      47      8 |       2     37
igr   xxxxx |       3      21     106      60      3 |       4      9
irf   xxxxx |      -7      -7     -38      -3      1 |      -2      8
jpl   uuuuu |      19       9      47     161      6 |      21     27
mit   uuuuu |     -21      14    -239     -38      4 |      11     15
ngs   uuuuu |      -2      16     178      85     -5 |       9     12
sio   uuuuu |      16      -3    -108    -175    -11 |      39     40

Table 7.1550.4   GPS week: 1550   Day: 4   MJD: 55098.500

                                                         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 |      10      -8      41      66      2 |       6     14
emr   uuxuu |      43     -20     414     123      9 |      65     66
esa   uuuuu |      -1     -12    -121     102     -8 |      26     28
gfz   uuuuu |       4      53     -41     -64      0 |      -4      8
grg   xxxxx |     -29     -45      40     -91     17 |       9     31
igr   xxxxx |     -16      47      52      69      3 |       4      9
irf   xxxxx |      14       4     -22      13      2 |      -2      8
jpl   uuuuu |      32      -9     128      25     14 |      22     27
mit   uuuuu |      14      22    -127     -72      3 |      12     15
ngs   uuuuu |     -60     -31     217      20     -4 |       9     12
sio   uuuuu |      48     -23     -42    -154     -6 |      37     39

Table 7.1550.5   GPS week: 1550   Day: 5   MJD: 55099.500

                                                         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 |     -22      -8     -13     -85      8 |       7     14
emr   uuxuu |      37       7     452     111     15 |      67     68
esa   uuuuu |     -16     -16     -29     112     -6 |      27     28
gfz   uuuuu |      20      52     -80     -59      1 |      -4      8
grg   xxxxx |      -5     -36     118      28    -10 |      11     31
igr   xxxxx |      15      54      57      67     -4 |       4      8
irf   xxxxx |      11      17     -37      31      5 |      -1      7
jpl   uuuuu |      25      11      72      98     11 |      25     29
mit   uuuuu |      19      51    -235      11      3 |      13     15
ngs   uuuuu |     -63    -101     337    -112     -6 |       9     12
sio   uuuuu |      40      27     -87    -147     -1 |      36     38

Table 7.1550.6   GPS week: 1550   Day: 6   MJD: 55100.500

                                                         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 |      13      36      90     -57     10 |       5     13
emr   uuxuu |      43      43     221      95     10 |      66     66
esa   uuuuu |      -4     -13      79     273     -9 |      23     25
gfz   uuuuu |      -3      22     -27       8      2 |      -6     10
grg   xxxxx |      37      90     -52      26     -6 |      10     32
igr   xxxxx |      43     105      63      -5     -6 |       2     10
irf   xxxxx |      14       6      43      44      5 |      -3      7
jpl   uuuuu |      41     -15      -4      71      3 |      23     27
mit   uuuuu |      15      17     -55     -15      4 |      10     14
ngs   uuuuu |     -59     -32     -12    -265     -5 |       6     11
sio   uuuuu |      39      -7      47    -239      1 |      33     34



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