[IGSREPORT-17222] Wk 1521 IGS Final Orbits

Jim Ray IGS.ACC at noaa.gov
Thu Mar 19 04:56:20 PDT 2009


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IGS Electronic Report   19 Mar 04:56:42 PDT 2009      Message Number 17222
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Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1521   (Mar 01, 2009 - Mar 07, 2009)

Contacts: J. Ray       (jim.ray at noaa.gov),
          J. Griffiths (jake.griffiths at noaa.gov)


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

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

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

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

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

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

where X and V are the inertial sv state and velocity vectors and c is the speed
of light. Also for compatibility, no satellite L1/L2 delay calibration should be
applied.


SOFTWARE:
---------

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

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

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

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

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


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

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

  The resulting x and y earth rotation parameters (ERP) associated with the IGS
ephemeris files and their rates (xrt, yrt) are computed using a weighted average
of all available centres (weights are those from the orbit combination). 
Pole rate combination uses only centres providing estimated pole rates.

  Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
Final IGS solutions.  AC LOD biases with respect to Bulletin A are estimated
using Bulletin A most recent 3 weeks (21 days), i.e. up to 5 days prior to
the last non-predicted day of Bulletin A.  AC LOD biases are removed and the
new AC bias-free LODs are used to compute a weighted IGS LOD which in turn
is integrated into IGS UT1-UTC. The starting UT1-UTC value is chosen as
Bulletin A fifth day prior to its last non-predicted day. Both IGS LOD and 
UT1-UTC values are printed in the IGS Final erp file.



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

igs1521[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1521[0-6].clk  IGS GPS satellite and station clocks in SP3 format.
igs1521[0-6].cls  IGS GPS clock combination summary report.
igs15217.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs15217.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.
    
               Day | Centre | PRN/STA list
               ----+--------+---------------
                0  |  COD   | 3 6 26
                0  |  ESA   | 6 26
                0  |  GFZ   | 7 13 15 17 23 29 AREQ BAN2 CHPI CONZ FAA1 GUAT HARB
                0  |  GFZ   | HOLM PRDS SCH2 SSIA
                0  |  GRG   | NLIB
                0  |  JPL   | 3 MATE SCH2
                0  |  MIT   | KHAJ
                1  |  COD   | 3 6 26
                1  |  EMR   | DAEJ
                1  |  ESA   | 6 KERG
                1  |  GFZ   | 7 26 29 DAEJ JPLM SCH2
                1  |  GRG   | NLIB
                1  |  JPL   | 3
                1  |  MIT   | PARC
                2  |  COD   | 3 6 26 MDVJ
                2  |  EMR   | YAKT
                2  |  ESA   | 3 6 USNO
                2  |  GFZ   | 7 15 17 19 23 26 29 SSIA
                2  |  GRG   | NOVM ULAB
                2  |  JPL   | 3 6 HARB
                2  |  MIT   | 10 USNO KHAJ MAW1 SSIA
                3  |  COD   | 3 6 26
                3  |  EMR   | DAEJ MIZU WTZR
                3  |  ESA   | 3 6
                3  |  GFZ   | 7 26 29 BOGT BUE1 DAEJ FAA1 GUAT LPGS SANT WTZR YELL
                3  |  GRG   | NLIB NOVM
                3  |  JPL   | 26
                3  |  MIT   | 20
                4  |  ALL   | 26
                4  |  COD   | 3 6
                4  |  EMR   | 26 MIZU
                4  |  ESA   | 3 6 REUN
                4  |  GFZ   | 7 29 FAA1 NISU
                4  |  GRG   | AUCK NLIB
                4  |  JPL   | YELL
                4  |  MIT   | 25
                5  |  ALL   | 26
                5  |  COD   | 3 6
                5  |  EMR   | 4
                5  |  ESA   | 6 27 SYOG
                5  |  GFZ   | 7 14 15 17 23 29 BOR1 FAA1 HARB ISPA LPGS QAQ1 SANT
                5  |  GFZ   | VESL
                5  |  GRG   | NLIB
                5  |  JPL   | 3 BOR1 DAV1 HARB
                5  |  MIT   | GUAT
                6  |  COD   | 3 6 26
                6  |  EMR   | HARB DAEJ HARB MIZU THU3 WTZR
                6  |  ESA   | 6 26
                6  |  GFZ   | 7 17 23 29
                6  |  GRG   | NLIB
                6  |  JPL   | 3 6 HARB THU3
                6  |  MIT   | CAS1 TOW2

    
 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
               ----+--------+--------+-------------
                6  |  MIT   | ~00:00 | ~ -0.18 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
               ----+------------+----------
               G10 | 2009_03_06 | 2009019 

 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  |     .4     .5     .7     -27    -14    -16    -.08
       EMR  |   11.8  -10.0   -8.7      34     10     69     .24
       ESA  |    6.6     .9    5.8      -4    -81     32     .05
       GFZ  |     .7     .6    1.4      24     -9     23    -.30
       GRG  |    4.4    2.4   -3.4      12    -15     21     .10
       JPL  |    6.8    2.2    9.4     -24    -13     -2     .10
       MIT  |    9.5   -4.9   -7.0     -22     23    -14    -.07
       NGS  |    4.1   -2.1   -4.1     -41    -83      1     .05
       SIO  |    3.5   -6.2     .8    -127    -57     55     .36


 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 1.1521.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1521.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 2.1521.[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 3.1521.[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 5.1521.0-6).

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 1521 summary.                       (Mar 01, 2009 - Mar 07, 2009)

Table 1.1521.a   GPS week: 1521   MJD: 54891.000-54897.000

         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  239|    0     0     2    11   -23   -30  -.15    8    8 |    -151    -485     12    105
        |    0     0     0    10    10    22   .02           |     473     742
emr   72|    0     0     5  -141  -111   -40   .46   19   19 |    4519     319     19    167
        |    1     0     1    21    19    20   .03           |    2016    2160
esa  118|    1     0     0   -30    68    -2   .29    8    8 |    -407     221     20    138
        |    0     1     2    15    28    17   .03           |    1188    1316
gfz  196|    0     0    -3   -74   -27   117  -.15   12   12 |    -630    -210     25    149
        |    0     0     0    16     8    75   .04           |    1351     201
grg  118|    4     2    -3   -64   -26   -21  1.06   41   38 |  210538 -142959     81    222
        |    2     1     2    13    11    66   .04           |  557140  377919
igr  n/a|    0     0     0   -34   -41    -6   .03    5    5 |    5118    -193     21     72
        |    0     0     1    14     9    45   .03           |    1823    2314
jpl  119|    1     0     7     5   -18   -34   .49   20   19 |    4898     297     20    107
        |    1     0     1    20    22    23   .04           |    1730    2102
mit  257|    0     0    -6    47  -108   -20  -.22   13   12 |     -86      97     22    143
        |    1     1     1    28    23    21   .04           |     218     459
ngs  220|    0     0    -1    51   107   -18  -.36   12    9 | -142993  165695   2386   3796
        |    0     0     1    25    27    22   .02           |  377904  439636
sio  258|   -1     0     1   206    37    50  -.02   20   19 |     ---     ---    ---    ---
        |    0     2     1    22    36    26   .03           |     ---     ---


Table 1.1521.b   GPS week : 1521   MJD: 54891.000-54897.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1521.0   GPS week: 1521   Day: 0   MJD: 54891.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  239|    0     0     3    14   -29   -24  -.12    7    7 |    -637     -56     12     87
        |                    -11     1                       |
emr   72|    0    -1     7  -133  -124   -17   .51   19   19 |    1695    1007     17    157
        |                     33    47                       |
esa  118|    1     0     0   -61   105    14   .31    9    9 |    -625    -894     18    136
        |                     34   -28                       |
gfz  196|   -1     0    -5   -73   -29    72  -.13   13   13 |     960     -94     25    166
        |                    -34     3                       |
grg  118|    1     0    -3   -45   -16  -113  1.10   42   40 |     110    -122     76    207
        |                    -22    13                       |
igr  n/a|    0     1     0   -27   -29   -16   .09    5    5 |    3478     847     20     71
        |                     -9   -12                       |
jpl  119|    2     0     7    -1     3   -14   .54   20   17 |    2490    1259     19    119
        |                    -11   -27                       |
mit  257|    1    -1    -7    15  -109     0  -.13   11   11 |      41     -12     26    151
        |                      9    -5                       |
ngs  220|    0     1    -1    73   101   -19  -.33   10    7 |    -592    -124   2480   3615
        |                    -41    49                       |
sio  258|   -2    -3     0   186    23    28  -.06   22   19 |     ---     ---    ---    ---
        |                    -55    27                       |

Table 2.1521.1   GPS week: 1521   Day: 1   MJD: 54892.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  239|    0     0     2     4   -31   -27  -.16    8    7 |    -311     -12     11    114
        |                     30    11                       |
emr   72|    0    -1     5  -149  -110   -68   .48   18   18 |    2281    3994     20    189
        |                     55    24                       |
esa  118|    0     2     1   -23   102   -12   .27    8    7 |   -2473    1556     19    142
        |                     21   -39                       |
gfz  196|    0     0    -3   -57   -34   198  -.17   11   11 |     214    -179     24    159
        |                    -28    11                       |
grg  118|    5     3    -1   -79   -27   -53  1.01   44   40 |    -443    -262     87    230
        |                     41    95                       |
igr  n/a|    0     1     1   -54   -49   -62   .03    5    5 |    4070    3703     20     61
        |                     32    -7                       |
jpl  119|    1    -1     8    -9   -12   -12   .54   19   18 |    3536    3967     20    100
        |                    -22     0                       |
mit  257|    2    -1    -7    36   -79   -48  -.21   11   10 |    -316     291     23    132
        |                      0   -18                       |
ngs  220|    0     0    -2    61    53   -18  -.39   12    9 |    -304     -51   2471   3674
        |                     16   154                       |
sio  258|   -1    -1     0   187    44    10  -.05   20   19 |     ---     ---    ---    ---
        |                    -43    23                       |

Table 2.1521.2   GPS week: 1521   Day: 2   MJD: 54893.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  239|   -1     0     2     4   -29   -47  -.16    8    8 |     243   -1012     12    116
        |                     73    18                       |
emr   72|    0     0     6  -174  -113   -26   .47   19   19 |    5112     878     17    164
        |                     82    22                       |
esa  118|    0     1     0   -19    65    -1   .28    7    7 |   -1142    1453     22    139
        |                      1   -20                       |
gfz  196|    0    -1    -3   -64   -14   197  -.21   12   12 |   -2523    -378     26    147
        |                      8     6                       |
grg  118|    4     1     0   -62   -45    27  1.01   43   41 | 1474014 -999999     76    220
        |                     76    49                       |
igr  n/a|    0     0     1   -49   -28   -46   .04    6    6 |    6511     325     23     82
        |                    -19   -11                       |
jpl  119|    5     0     9   -11    -3   -33   .48   19   18 |    5963     623     23    121
        |                     33     0                       |
mit  257|    2     0    -6    86  -130   -40  -.23   13   12 |      71    -257     22    160
        |                     -4    -1                       |
ngs  220|   -1     0     0     0    94   -34  -.33   12    8 | -999999 1162696   2135   3462
        |                     58     3                       |
sio  258|   -1     0     1   252     8    53  -.03   20   20 |     ---     ---    ---    ---
        |                    -89    17                       |

Table 2.1521.3   GPS week: 1521   Day: 3   MJD: 54894.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  239|   -1     1     1    35   -10   -45  -.16    9    8 |    -456     -23     11    131
        |                      0   -20                       |
emr   72|   -2     0     4  -159  -108   -31   .40   19   19 |    6147    1212     20    209
        |                     84    18                       |
esa  118|    1     0     2   -34    73   -25   .34    8    8 |    -517    1133     21    139
        |                     36    22                       |
gfz  196|    0     0    -3   -96   -38   129  -.14   12   12 |   -1544    -216     29    151
        |                     -2    -7                       |
grg  118|    4     0    -4   -50   -32   -23  1.02   38   37 |    -361     740     76    213
        |                     24    11                       |
igr  n/a|    0     1     0   -15   -40     8   .02    5    5 |    6862     602     25     87
        |                    -21    -9                       |
jpl  119|    1     0     6    16   -22   -35   .47   20   19 |    6436     891     23    108
        |                    -27    -1                       |
mit  257|    1     0    -7    48  -140    -3  -.22   13   12 |    -452    1017     22    165
        |                     -4   -13                       |
ngs  220|    0     0    -1    51   128   -14  -.38   12    9 |    -334    -199   2646   4077
        |                    -15   -32                       |
sio  258|   -1     1     0   199    -7    61  -.01   18   20 |     ---     ---    ---    ---
        |                    -80     8                       |

Table 2.1521.4   GPS week: 1521   Day: 4   MJD: 54895.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  239|    0     0     3     5   -21    -5  -.14    8    8 |       6   -1156     15    110
        |                     74    -9                       |
emr   72|   -1     0     6  -138  -142   -69   .47   19   19 |    6830    -572     20    190
        |                     82    57                       |
esa  118|    1     0    -1   -35    62   -14   .27    8    8 |     582    -737     21    133
        |                     -6    44                       |
gfz  196|    0     0    -4   -54   -31   160  -.11   11   11 |     289    -560     24    133
        |                     12    -2                       |
grg  118|    1     4    -5   -64   -30    29  1.10   40   36 |      48    -458     89    246
        |                     86    41                       |
igr  n/a|    0     0     0   -42   -50   -14   .02    5    5 |    6956   -1133     19     64
        |                      0    25                       |
jpl  119|    1    -1     8   -15   -58   -48   .42   20   20 |    6740    -596     21    102
        |                     45    31                       |
mit  257|    0     2    -4    66   -97   -39  -.24   15   14 |      54    -284     23    120
        |                     11   -20                       |
ngs  220|   -1     0    -3    38   127   -57  -.34   13    9 |     128   -1361   2484   4258
        |                     24   -38                       |
sio  258|   -1     2     2   216    53    36  -.00   19   18 |     ---     ---    ---    ---
        |                    -72     5                       |

Table 2.1521.5   GPS week: 1521   Day: 5   MJD: 54896.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  239|    0     0     1     9   -35   -61  -.18    9    8 |     652   -1555     13    100
        |                     21    28                       |
emr   72|   -1    -1     4  -127  -103   -31   .45   20   20 |    5995   -2205     20    114
        |                     52    31                       |
esa  118|    1     0    -3   -29    33     0   .26    8    8 |    1078   -1731     22    150
        |                     15    26                       |
gfz  196|    0     0    -2   -91   -25    67  -.19   12   12 |     169     -88     26    151
        |                     18    30                       |
grg  118|    6     2    -5   -67   -13    66  1.09   41   38 |     258    -363     86    221
        |                     19    26                       |
igr  n/a|    0     0     0   -32   -53    12  -.02    6    5 |    5591   -2841     23     78
        |                    -26     7                       |
jpl  119|    0     0     8    30   -38   -18   .46   20   20 |    5823   -2168     21    107
        |                    -22    -6                       |
mit  257|    0     1    -4    68   -81     3  -.23   15   14 |     108    -214     20    145
        |                     -4   -17                       |
ngs  220|   -1     0     0    73   112     3  -.36   14    9 |     707   -1491   2090   3695
        |                     40   -14                       |
sio  258|   -1     0     3   206   104    80  -.00   21   19 |     ---     ---    ---    ---
        |                    -95   -19                       |

Table 2.1521.6   GPS week: 1521   Day: 6   MJD: 54897.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  239|    0     1     3    10    -9    -2  -.15    9    8 |    -557     417     11     81
        |                     25     7                       |
emr   72|    0     0     4  -107   -79   -36   .47   19   19 |    3574   -2078     20    150
        |                     31     8                       |
esa  118|    1     0    -2   -12    33    23   .28    8    8 |     245     770     18    127
        |                     13    17                       |
gfz  196|    0    -2    -2   -82   -20    -3  -.13   10   10 |   -1978      40     23    142
        |                      2    11                       |
grg  118|    6     2    -5   -79   -15   -84  1.09   41   36 |     144    -250     80    223
        |                     44    19                       |
igr  n/a|    0     0     0   -20   -40    76   .01    5    5 |    2364   -2854     18     61
        |                    -36   -17                       |
jpl  119|    0    -1     6    31     0   -79   .52   20   18 |    3299   -1891     19     94
        |                    -20   -46                       |
mit  257|   -1     2    -4    11  -117   -12  -.27   13   11 |    -114     144     21    128
        |                     19     2                       |
ngs  220|    0     0     0    62   131     7  -.37   12    9 |    -557     396   2402   3796
        |                     -9    23                       |
sio  258|   -3     1     2   196    37    82   .01   22   21 |     ---     ---    ---    ---
        |                    -95    -3                       |

       
       
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 3.1521.0   GPS week: 1521   Day: 0   MJD: 54891.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    8   24    8   19   31    7   20    9    9   31    5 |    21   35   24   28   39   23   32   20   20   26    21
   3E |   13   17   12   11   57    8   17   17   21   27    6 |    27   41   35   30   54   32   45   38   38   41    33
   4  |    7   13    6   14   32    7   11   10    9   16    3 |    24   26   32   38   36   28   14   32   38   27    30
   5  |    8   12    6   13   24    5    8    9    7   18    3 |    18   22   23   21   32   20   21   22   24   25    19
   6E |   14   20   10   17  109    9   19   14   21   17    6 |    96  101   98   97   96   94  103  101   96  100    98
   7  |    6   21    9   13   29    4   20   10    8   22    4 |    19   29   27   24   41   23   27   20   28   27    22
   8  |    7   14    7    9   36    3   10    7    6   15    3 |    17   25   20   18   27   18   22   21   19   19    18
   9  |    8   13   11    9   23    5   10    7    6   28    4 |    21   26   22   19   30   21   24   18   20   31    19
  10  |    6   16    9   14   26    4    9   10    6   17    4 |    15   19   21   22   29   19   17   18   18   19    18
  11  |    6   20    9    8   77    5   19   14    8   10    4 |    27   35   30   33   53   29   32   35   26   28    28
  12  |    7   23   10   13   25    6   22    8    7   41    5 |    27   37   28   22   40   28   36   27   30   28    26
  13E |    6   18    8   13   25    5   22   14    9   15    4 |    14   24   18   13   30   16   26   19   20   18    14
  14E |    8   18   10   12   24    6   25   18    9   18    5 |    18   24   22   18   29   18   25   24   21   22    18
  15E |    7   21   10   12   35    3   23    9    7   18    4 |    17   27   21   18   33   18   25   20   18   27    18
  16  |    6   24   10   15   27    9   26   10    8   21    5 |    21   36   25   17   37   24   38   22   24   25    22
  17E |    6   19   12   10   36    3   21   13   11   20    5 |    19   26   20   22   36   20   24   24   26   22    20
  18  |    7   22    7   13   35    5   23    9    8   26    5 |    21   33   24   27   34   23   30   25   27   24    23
  19E |    8   21   10   18   40    5   25   12   10   18    5 |    19   33   31   29   39   24   31   23   26   33    24
  20  |    7   19   10   12   39    8   19   11    9   31    5 |    25   33   29   31   37   29   33   31   29   37    27
  21  |    7   21   12    9   69    4   28   11   11   27    5 |    24   31   27   29   53   24   34   29   24   30    25
  22  |    8   19    8    9   54    5   22    9    6   28    4 |    26   37   30   31   42   28   34   32   30   28    28
  23E |    5   23   11   16   32    5   28   13   11   18    5 |    18   27   20   20   30   20   30   22   26   23    19
  24  |    5   13    7   11   37    4   11    6    9   13    3 |    28   30   33   37   19   31   27   35   32   30    31
  25  |    5   13    9   10   24    4   11   10    5   19    3 |    14   23   21   14   29   18   23   20   21   20    17
 X26E |   11   29   11   13   95    4   19   12   15  ---    6 |    32   38   41   39   46   37   34   36   47  ---    36
  27  |    6   12    9    7   31    3    9   13    6   11    3 |    23   31   26   24   32   24   30   25   24   25    24
  28  |    7   23   12   10   36    3   19    9   12   17    4 |    21   36   25   18   46   22   30   23   20   24    20
  29E |    7   25    8   11   31    3   23    9    7   22    4 |    17   28   17   19   37   18   24   22   23   26    19
 X30  |    5   13    6   11   18    5   12    7    6  ---    3 |    25   27   28   27   26   26   23   26   29  ---    25
  31  |    7   22    8   14   27    5   24    9   10   17    4 |    24   34   28   30   40   25   32   26   25   28    24
  32  |    8   19   13   10   27    6   18   13   11   23    5 |    16   23   26   23   32   20   21   22   20   27    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    9   13   42    5   20   11   10   22      |T   23   32   28   27   38   25   30   27   28   28    25
 WRMS |    7   19    9   13   40    5   17   11    7   19      |NE  21   29   26   25   35   23   27   25   25   26    23
 MEDI |    7   19    9   12   32    5   19   10    9   18      |MD  21   30   26   24   36   23   30   24   25   27    22

Table 3.1521.1   GPS week: 1521   Day: 1   MJD: 54892.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    9   22    7   16   32    7   22    7   11   29    5 |    13   30   18   16   35   16   29   15   15   18    13
   3E |   12   17   10   10   51    9   16   17   24   26    6 |    21   34   25   25   45   29   34   24   36   26    23
  X4  |    8   12    4   10   37    6  ---    8   10   16    3 |    19   21   22   25   40   22  ---   27   27   25    20
   5  |    7   11    5   14   26    6    8   11   12   12    3 |    16   21   19   21   28   16   19   19   13   21    15
   6E |   14   19    8   14   93    8   18   16   20   22    5 |    73   76   74   71   85   73   77   72   68   71    71
   7  |    7   20    6   14   26    5   18   10   13   20    4 |    15   28   17   21   40   19   25   17   25   21    16
   8  |   10   11    6    7   18    3    9    9    9   17    3 |    12   18   16   12   24   13   20   18   14   22    13
   9  |    6   12    8    9   34    4    8    8   11   22    3 |    15   24   19   17   35   18   22   16   20   24    16
  10  |    6   12    5   12   32    5   10    6   11   15    3 |    11   18   17   17   21   14   16   15   17   16    12
  11  |    8   17    7   10   73    5   19   14    9   13    4 |    24   34   25   29   46   28   30   31   29   27    25
  12  |    7   20    8   12   23    6   18   11   12   38    5 |    23   35   23   24   33   23   29   25   20   30    22
  13E |    7   17    7   11   38    5   21   13   11   12    4 |    15   25   18   18   28   18   24   23   22   17    16
  14E |    7   19    7   10   43    6   21   11    9   18    4 |    13   22   16   12   27   13   21   16   18   15    12
  15E |    7   19    9   12   35    4   21    9   10   13    4 |    10   25   18   17   32   14   24   18   15   21    14
  16  |    6   25    9   11   31    5   24   11   10   18    5 |    13   29   17   16   32   16   30   16   15   16    14
  17E |    6   16    8    8   39    4   24   13    6   13    4 |    20   23   21   20   44   21   23   23   23   20    19
  18  |    7   20    8   15   42    6   23    8    8   24    4 |    14   25   16   18   34   14   25   19   14   19    13
  19E |    7   22    8   16   34    5   25   11   10   19    5 |    16   31   22   25   29   20   27   20   16   21    18
  20  |    6   19    6   10   50    6   19   12   11   28    5 |    17   29   20   21   36   20   27   23   15   27    18
  21  |    9   25   11   10   69    5   24   10    8   25    5 |    17   29   21   21   42   21   26   22   23   32    19
  22  |    6   19    5   12   61    6   20   10    9   20    4 |    15   27   19   21   37   18   28   20   20   18    16
  23E |    7   21    7   14   38    4   27   14   13   15    5 |    24   35   26   26   35   27   30   28   29   32    24
  24  |    5   11    7   11   39    6   10   10    7    8    3 |    31   35   34   34   28   33   30   36   33   34    32
  25  |    8   16    6    8   24    5    9    8   10   17    3 |    13   23   19   18   25   17   19   19   22   22    16
  26E |   15   17    9   14   77    6   21   13   22   19    6 |    17   25   24   27   37   23   28   23   38   26    21
  27  |    6   10    5    8   31    4   10   13    8   10    3 |    18   25   22   22   34   20   25   20   21   19    19
  28  |    8   21   10    8   32    4   19   10   12   17    4 |    15   32   17   20   36   18   30   21   16   23    16
  29E |    7   21    9   11   23    5   23   11   10   19    5 |    14   26   16   16   26   17   22   21   18   24    15
  30  |    4   11    5    9   23    6   11   10    9   11    3 |    18   21   24   20   24   19   21   19   15   23    18
  31  |    7   22   10   12   33    6   19    8   12   18    4 |    18   35   23   24   38   23   33   19   28   20    20
  32  |    7   18    5    9   35    5   16   12   10   23    4 |    12   22   16   16   29   17   21   19   13   24    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   18    8   11   44    5   19   11   12   20      |T   18   28   22   22   35   21   27   22   22   24    19
 WRMS |    7   18    7   11   40    5   17   10    9   19      |NE  16   26   20   20   33   19   25   20   19   22    17
 MEDI |    7   19    7   11   35    5   19   11   10   18      |MD  16   26   19   21   34   19   25   20   20   22    16

Table 3.1521.2   GPS week: 1521   Day: 2   MJD: 54893.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |   10   23    6   20   31    6   24    8   13   30    5 |    16   33   19   21   33   18   28   16   20   19    16
   3E |   13   17    9   11   67    8   18   18   25   27    6 |    17   29   24   27   43   24   30   26   37   29    23
  X4  |   11   14   13   14   75   11  ---   20   49  ---   10 |    19   22   23   31   60   27  ---   26   61  ---    24
   5  |    6   13    4   13   21    6   10   14   10   15    3 |    12   14   12   11   29   12   14   15   14   18    10
   6E |   13   25    8   19  103   12   23   25   15   38    7 |    58   62   59   58   80   59   63   62   61   59    58
   7  |    7   21    5   16   27    7   20   11    9   23    4 |    16   29   16   22   33   20   25   15   22   19    16
   8  |   12   17    6    7   23    4    9    9    7   18    4 |    15   25   16   17   23   16   18   18   16   16    15
   9  |    5   13    6    9   24    4   10    9   11   20    3 |    14   21   16   16   34   15   20   14   13   21    13
  10  |    7   14    6   17   30    5   10   10    7   13    3 |    14   20   21   24   22   20   14   18   17   16    17
  11  |    7   14    5    8   83    5   18   15   11   15    4 |    18   32   25   24   55   21   30   26   20   22    21
  12  |    9   21    7   13   25    7   20   13   10   34    5 |    21   31   21   20   39   22   30   20   23   26    20
  13E |    6   19    7   14   29    7   20   13   11   12    4 |    10   28   16   15   30   15   22   20   13   18    13
  14E |    6   17    9    9   32    4   20   14   13   16    4 |    14   21   18   18   27   18   19   15   21   21    15
  15E |    6   19   10   14   32    4   21   10   10   16    4 |    12   23   15   15   27   13   21   14   12   19    12
  16  |    8   24    7   13   30    5   25   12   12   19    5 |    14   32   18   14   34   17   30   16   20   16    16
  17E |    7   20    7   11   29    6   25   14   13   14    4 |    18   26   23   19   34   17   24   22   20   17    18
  18  |    6   23    6   13   51    5   21    9   12   25    5 |    16   28   18   22   40   16   25   18   19   18    15
  19E |    6   21    7   15   36    6   21   14   12   13    4 |     9   24   19   17   33   13   21   14   11   19    12
  20  |    8   20    9   12   47    7   22   13   11   27    5 |    20   32   27   27   37   23   29   25   19   28    22
  21  |   10   20    7    9   60    6   23   11    9   25    5 |    22   26   16   22   39   18   27   20   22   26    18
  22  |    5   21    6    9   65    5   20   10   12   20    4 |    19   29   22   24   41   20   28   23   23   21    20
  23E |    7   17    8   15   43    7   29   14   11   14    5 |    16   25   18   17   38   17   27   16   17   19    14
  24  |    5   14    5   10   24    5   12   11    6    9    3 |    25   25   27   31   29   26   24   28   30   24    27
  25  |    7   14    4    8   23    7   11   10    8   16    3 |    13   22   16   15   24   17   21   19   18   19    15
  26E |   15   18   10   14   57    5   19   15   22   19    6 |    17   25   22   27   36   20   25   22   35   23    21
  27  |    9   12    6    7   21    3   11   12   11   13    3 |    14   22   19   18   31   16   23   16   16   17    16
  28  |   10   18    5    7   33    6   15   10   13   21    4 |    16   26   14   13   36   14   22   18   18   24    13
  29E |    7   16    8   12   24    7   23   15    7   16    4 |    14   21   13   17   26   13   19   20   16   19    13
  30  |    6   14    5   10   21    8   13   12    8   14    3 |    17   18   19   16   33   16   18   18   19   14    16
  31  |    8   28    8   14   23    7   24    9   10   17    5 |    17   33   21   23   40   19   31   19   16   21    18
  32  |    8   18    6   11   25    4   15   12    8   19    4 |    14   23   20   18   26   17   21   17   15   17    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    7   12   43    6   19   13   12   20      |T   17   26   20   21   35   19   24   20   22   21    18
 WRMS |    8   19    7   12   41    6   18   12    8   20      |NE  16   25   19   20   35   18   23   19   21   20    17
 MEDI |    7   18    7   12   30    6   20   12   11   17      |MD  16   25   19   19   34   17   24   18   19   19    16

Table 3.1521.3   GPS week: 1521   Day: 3   MJD: 54894.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |   10   23    7   16   27    4   23    9    9   28    5 |    17   33   24   23   33   18   30   19   21   23    19
   3E |   13   20    9   15   52   10   17   19   22   24    6 |    19   33   30   29   38   24   30   28   34   28    24
  X4  |    8   10    6    9   39    6  ---   11   12   12    3 |    24   25   25   29   49   26  ---   28   31   27    25
   5  |    8   11    5   11   22    3   10   14    7   12    3 |    21   22   26   25   23   21   21   24   20   23    21
   6E |   12   20    8   14   59    6   20   17   18   22    5 |    45   54   51   52   51   48   53   50   49   52    48
   7  |   11   23    6   16   29    4   20   14   11   23    5 |    17   35   25   31   38   24   28   20   31   24    23
   8  |    9   15    8   13   27    6   10    8    8   14    4 |    12   25   22   17   25   17   20   20   22   17    16
   9  |    7   12   10   10   17    4   10    7   10   19    4 |    22   26   31   24   34   21   27   19   21   24    23
  10  |    9   12    7   11   29    3   10    9   15   10    4 |    14   17   20   16   39   14   16   12   16   13    15
  11  |    7   17    9    7   74    4   20   15   10   12    4 |    24   34   24   28   55   26   30   30   26   26    24
  12  |   11   18    7   13   27    4   19   14   11   29    5 |    26   32   30   25   35   26   33   27   25   25    25
  13E |    8   17    6   13   42    5   24   13    9   10    4 |    18   28   19   20   34   19   26   23   24   22    18
  14E |    9   18    9   12   29    6   21   15   14   17    5 |    12   20   18   15   27   11   20   13   19   19    12
  15E |    8   22   11   15   33    5   18   11   12   18    5 |    15   24   19   19   29   16   21   22   18   27    16
  16  |    6   26    8   15   26    4   26   14    9   20    5 |    20   32   26   20   37   19   32   20   25   21    22
  17E |    6   18    9    8   32    3   26   14   14   14    5 |    31   33   27   33   32   29   35   34   37   36    31
  18  |    8   22    8   13   41    5   23    9   10   25    5 |    20   28   18   21   37   17   27   22   19   18    18
  19E |    7   27   10   16   34    5   25   15   11   15    5 |    18   31   25   22   34   18   25   19   22   24    19
  20  |    6   17    7    9   42    6   21   13    9   25    4 |    22   30   23   23   34   19   27   28   18   25    21
  21  |    9   23    9   10   55    5   22   10    8   23    5 |    22   33   25   24   42   24   30   26   28   32    24
  22  |    7   21   10   12   53    5   23   11    9   17    4 |    21   32   24   25   34   21   31   25   20   21    22
  23E |    7   18    7   12   42    4   31   12    8   12    4 |    24   33   26   24   42   25   33   27   26   28    24
  24  |    8   12    4   12   34    4   13   12    6    9    3 |    32   32   33   36   24   33   34   36   37   32    33
  25  |    7   13    7    8   21    4   11    9    9   16    3 |    13   21   21   17   30   17   20   17   19   21    16
  26E |   12   21   11   13   51    5   17   13   20   20    5 |    18   24   22   24   33   19   25   21   35   24    20
  27  |    6   12    8    6   23    5   10    9   11    9    3 |    18   26   27   23   37   20   26   19   22   18    21
  28  |    8   22    7    6   42    4   16   10   10   22    4 |    18   32   21   19   43   18   26   21   21   25    18
  29E |    9   16    9   13   33    4   22   17    6   14    4 |    17   24   20   26   31   21   27   26   24   24    21
  30  |    7   10    4    9   18    3   13   11    9   13    3 |    26   27   28   29   27   27   26   28   28   21    26
  31  |    7   24    9   11   35    7   25   13   11   17    5 |    22   31   26   27   39   21   32   24   21   21    22
  32  |    6   18    7    9   26    6   18   13   11   19    4 |    15   26   20   18   28   15   20   21   12   20    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19    8   12   38    5   20   13   12   18      |T   20   29   25   24   35   21   27   24   24   24    22
 WRMS |    8   19    8   12   37    5   19   12    9   20      |NE  20   28   24   23   35   21   26   23   23   22    21
 MEDI |    8   18    8   12   33    5   20   13   10   17      |MD  20   30   25   24   34   21   27   23   22   24    21

Table 3.1521.4   GPS week: 1521   Day: 4   MJD: 54895.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |   10   24    7   15   27    6   24   14   15   29    6 |    19   36   23   21   38   21   31   22   23   22    20
   3E |   10   18   11   12   61    6   18   20   28   26    6 |    23   35   32   24   47   26   34   29   38   32    26
  X4  |    9   12    6    9   37    7  ---   16   15   14    4 |    20   25   26   27   35   26  ---   30   30   28    24
   5  |    7   11    5   10   21    4   10   14    8   12    3 |    19   25   23   20   27   22   26   23   22   25    21
   6E |    9   20    7   11   62    7   19   17   21   22    5 |    30   41   34   33   47   32   41   32   34   37    31
   7  |    7   18   11   16   46    6   20   20   14   21    5 |    19   29   23   24   45   20   25   25   22   24    20
   8  |    9   12    7    6   45    5   10   13   11   14    3 |    20   23   22   18   39   19   20   22   21   20    19
   9  |    7   11    5    9   15    4    9    9    8   17    3 |    18   24   19   17   30   18   21   18   20   23    17
 X10  |    8   11    6   11  110    6  ---   11   11   11    4 |    11   17   18   19   57   14  ---   17   17   16    14
  11  |    8   16    6    9   65    6   20   15   11   15    4 |    19   36   26   24   48   25   29   28   25   26    23
  12  |    9   20    8   10   24    5   20   15   11   28    5 |    21   32   23   20   33   24   31   22   24   22    21
  13E |    6   14    7   10  ---    5   22   16   12   11    4 |    19   31   22   22  ---   21   28   26   22   27    21
  14E |    7   19    7    9   28    6   18   15   12   16    4 |    23   30   26   21   31   24   29   26   26   23    23
  15E |    9   19    9   14   31    3   18   10   12   16    4 |    20   28   25   22   33   23   25   26   26   26    21
  16  |    7   27    9   16   30    4   28   14   10   23    6 |    23   36   31   22   47   25   35   25   30   33    25
  17E |    6   18    9    7   40    6   26   22   14   17    5 |    44   51   48   45   57   46   49   45   42   50    45
  18  |    7   24    7   13   35    6   23   10   12   26    5 |    23   34   27   29   35   26   31   29   29   27    25
  19E |    7   20    8   13   30    4   25   19   10   18    5 |    19   33   27   22   37   23   30   28   22   28    22
  20  |    7   20    9    9   53    6   21   14   14   27    5 |    23   37   30   26   42   25   31   32   28   27    25
  21  |    8   21    9   11   55    5   22   11   13   25    5 |    21   32   27   25   39   24   30   26   24   33    23
  22  |    7   20    6   13   53    4   22    9   11   18    4 |    23   35   30   31   39   28   34   29   31   26    27
  23E |    6   22    9   14   23    6   33   15   12   13    5 |    22   35   24   25   39   24   33   27   26   26    23
  24  |    6   12    5   11   32    5   11   15   11    9    3 |    28   29   37   38   25   34   29   31   36   30    32
  25  |    7   13    7    8   46    5   11   19   10   15    4 |    22   26   23   20   30   20   21   25   24   24    21
  26E |   15   20   10   17   56    8   19   15   25   21    6 |    21   28   25   25   31   24   28   24   36   27    22
  27  |    8   15    8    7   33    3   12   14   14   12    4 |    17   28   22   17   34   19   23   18   22   19    19
  28  |    6   19    7    5   39    5   18   10    8   24    4 |    20   32   19   18   46   21   28   23   23   28    19
  29E |    7   18   13   10   27    4   23   19    7   15    5 |    25   32   35   28   45   31   33   29   31   32    29
  30  |    7   11    7   10   14    4   13   13    8   11    3 |    22   26   27   24   30   24   28   26   30   23    24
  31  |    7   24   10    9   35    8   28   13   10   16    5 |    23   36   32   23   47   26   35   29   28   32    26
  32  |    8   20   11    9   25    7   19   12   16   21    5 |    18   29   28   20   30   23   25   27   27   21    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    8   11   40    5   20   15   13   19      |T   21   31   26   24   38   24   29   26   27   27    23
 WRMS |    8   19    8   11   36    5   20   14    9   18      |NE  20   29   25   23   37   23   28   25   25   25    22
 MEDI |    7   19    7   10   35    5   20   14   12   17      |MD  21   32   26   23   38   24   29   26   26   26    23

Table 3.1521.5   GPS week: 1521   Day: 5   MJD: 54896.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    9   20    8   13   30    4   23   14   12   31    5 |    20   33   20   21   35   18   33   20   22   22    19
   3E |   12   20    8   12   55    9   15   20   21   28    6 |    21   33   20   23   35   18   26   23   32   34    21
  X4  |   11   13    7    7   27    4  ---   17   10   18    4 |    14   22   17   19   21   17  ---   22   19   25    16
   5  |    7   12    6   13   16    5   10   17    9   16    4 |    18   25   17   23   20   18   21   19   24   19    18
   6E |   10   21    7   13   52    7   18   18   19   22    5 |    36   43   34   38   45   34   40   37   44   38    36
   7  |   10   25    8   13   38    6   19   23   16   23    6 |    16   31   20   19   40   15   23   20   24   20    16
   8  |   11   14    8    9   32    6    8   14   17   15    4 |    16   24   18   14   27   14   18   17   24   17    15
   9  |    7   13    7   12   17    4   10   11   11   15    3 |    21   25   17   22   26   19   23   19   24   19    19
 X10  |   18  ---   23  ---  ---   24  ---  ---  ---  ---   21 |     7  ---   63  ---  ---   18  ---  ---  ---  ---    10
  11  |    7   19    6   10   75    6   19   17   13   22    5 |    18   29   20   18   51   17   26   20   20   18    16
  12  |    9   18    8   12   22    6   17   11   11   28    5 |    19   27   19   19   31   17   25   21   21   21    18
  13E |    8   19    7   15   32    4   24   18   15   14    5 |    15   29   20   19   31   15   23   21   18   20    15
  14E |    7   20    7   11   30    5   23   12   12   16    4 |    16   25   22   19   35   17   24   19   24   18    18
  15E |    9   21    8   22   39    4   22   11   13   17    5 |    15   27   19   26   31   16   25   16   17   22    16
  16  |    7   25    6   11   25    3   24   14    7   26    5 |    21   35   23   18   44   19   31   23   25   26    21
  17E |   10   13   11    9   39    5   29   18   12   15    5 |    42   47   42   40   58   41   47   48   44   44    42
  18  |    7   27    6   13   34    5   23   11   11   29    5 |    18   33   19   23   32   17   26   21   25   18    18
  19E |    9   20    7   13   39    6   29   18    8   15    5 |    15   27   19   15   39   11   23   16   15   20    14
  20  |    7   20    8   12   45    6   21   16   14   26    5 |    17   30   21   22   34   16   25   22   21   17    17
  21  |    7   23    8   11   59    5   25   10   10   27    5 |    18   28   20   20   35   18   26   20   25   30    19
  22  |    6   22    6   12   66    5   21    9    8   21    4 |    20   31   23   25   42   20   28   23   27   22    22
  23E |    7   23    8   14   41    7   29   13   12   12    5 |    25   37   23   24   33   26   33   25   29   29    24
  24  |    7   20    7    9   24    5   14   17   11   14    4 |    30   34   35   32   35   29   29   29   36   31    31
  25  |    9   15    6    9   25    5   11   14   12   16    4 |    17   22   20   17   27   15   19   16   23   25    17
  26E |   16   21   13   17   51    7   17   15   26   23    6 |    17   23   22   25   32   17   23   16   25   20    15
  27  |    8   10    8    8   31    5    8   15   15   14    4 |    19   24   18   21   26   18   26   18   24   21    18
  28  |    8   20    7   10   25    6   19   11   14   27    5 |    20   28   20   17   31   16   24   19   27   28    18
  29E |    8   24    8   11   68    6   27   16   14   19    5 |    28   32   26   25   53   26   30   30   34   26    26
  30  |    5   10    6   11   23    3   11   14    7   18    3 |    24   29   24   25   21   22   22   23   27   17    22
  31  |   10   21    7   17   34    5   22   15   12   23    5 |    20   31   22   27   42   21   31   23   24   31    22
  32  |    7   19    6   10   21    6   19   12   15   19    4 |    11   23   17   15   23   12   17   16   17   13    12
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20    8   12   41    6   20   15   14   21      |T   19   29   23   22   34   19   26   22   25   23    19
 WRMS |    8   20    8   12   38    5   20   14    9   19      |NE  18   28   22   20   32   17   24   20   23   22    18
 MEDI |    8   20    7   12   32    5   19   14   12   19      |MD  18   29   20   21   33   18   25   20   24   21    18

Table 3.1521.6   GPS week: 1521   Day: 6   MJD: 54897.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |   11   21    7   11   27    5   21   11   13   30    5 |    22   31   19   23   36   21   27   22   21   31    18
   3E |   14   20   12    9   51    7   15   20   20   37    6 |    26   31   28   27   34   26   28   23   32   31    24
   4  |    8   12    6    8   56    5   11   12   13   13    3 |    24   27   26   34   32   29   15   36   32   32    27
   5  |    8   12    6    9   22    5   10   10   11   16    3 |    18   20   20   21   22   18   18   21   23   22    18
   6E |   10   20    9   10   66    6   16   21   15   28    5 |    46   53   52   53   61   48   51   45   52   46    48
   7  |    9   25    9   16   32    5   20   23   10   21    6 |    20   33   23   26   36   20   26   24   21   25    20
   8  |    5   13    6    5   20    4   11    7   10   16    3 |    17   22   21   18   24   19   21   22   20   21    18
   9  |    8   14    7   10   20    3   10   12   14   15    4 |    21   21   21   19   30   18   19   18   21   19    17
 X10  |    8   11  ---    8   33    8  ---   13   12   14    4 |     7    7  ---    4    8    7  ---    5    5    4     7
  11  |    9   16    6   10   76    4   22   12   11   13    4 |    22   31   24   27   60   25   28   28   29   24    23
  12  |   10   21    7   12   32    5   20   11    8   29    5 |    23   33   23   24   41   24   32   23   26   23    22
  13E |    8   19    8    9   36    4   22   11   10   17    4 |    18   26   18   17   37   18   22   19   20   23    16
  14E |   10   19    9    9   30    6   23   12   14   18    5 |    26   29   27   22   34   20   25   27   26   22    23
  15E |    8   23    9   14   33    6   22   13   10   21    5 |    20   26   21   24   25   18   25   24   21   29    19
  16  |    7   25    7    9   25    7   24   13   15   29    5 |    25   36   28   25   36   27   36   27   31   39    27
  17E |    8   16    7    9   36    4   27   14    8   14    4 |    62   68   61   63   64   64   63   68   68   62    63
  18  |   11   22    9   13   30    6   25    8   13   32    6 |    26   33   29   31   35   26   30   26   27   29    26
  19E |    8   22    9   12   41    6   30   16   12   12    5 |    16   28   22   21   29   18   27   19   24   22    18
  20  |    7   20   10    7   49    5   21   13   12   28    5 |    25   31   31   26   41   26   29   32   32   26    27
  21  |    7   22    8   10   58    6   23    9   13   24    5 |    25   30   26   27   45   24   28   25   25   35    24
  22  |   10   22    8   12   49    4   22    7    8   25    5 |    29   32   34   35   37   30   31   31   30   29    29
  23E |    6   26    9   10   40    5   26   12   13   12    5 |    29   40   33   32   50   31   36   32   34   33    31
  24  |    8   12    6    6   42    5   11   14   13    7    3 |    26   30   31   31   26   29   27   29   33   28    29
  25  |    7   10    7    6   21    5   10   10    9   17    3 |    18   24   22   19   28   20   26   20   16   25    18
  26E |   13   18   10   18   53    7   17   20   22   23    6 |    21   30   23   31   31   26   28   24   40   25    23
  27  |    5   13    5    6   31    5   11    8   11   15    3 |    21   25   20   19   31   20   23   18   22   22    19
  28  |    6   18    9    9   43    5   19   10   13   26    4 |    23   27   23   19   43   22   26   23   24   31    20
  29E |    8   24   10    8   36    6   28   13   12   17    5 |    52   51   53   54   55   50   49   51   50   49    50
  30  |    5   13    5    6   30    5   10   11   10   18    3 |    25   25   25   26   21   23   22   25   29   23    24
  31  |    8   22    7   11   32    5   21   12    8   22    5 |    25   32   26   26   38   23   30   25   25   33    24
  32  |    8   16   10    9   26    7   19   15   11   21    4 |    17   22   25   19   27   19   21   22   25   20    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19    8   10   41    5   20   13   12   22      |T   25   30   27   27   36   25   28   26   28   28    24
 WRMS |    8   19    8   10   36    5   18   11    9   21      |NE  21   27   24   23   33   22   25   23   24   25    21
 MEDI |    8   19    8    9   33    5   20   12   12   18      |MD  23   30   25   26   35   23   27   24   26   26    23



Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the estimated coordinates for the Latitude,
         Longitude and Height components.  See Table 5 for the daily summary.

         CLK  - Satellite clocks used.
         EPO  - Mean number of satellite clock epochs available in the daily
                solutions.
         Units: mm.

Table 4.1521   GPS week: 1521   MJD: 54891.0-54897.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2974 |U    7     6    21 |U    8     9    28 |U    7     6    17 |
emr | emr 2949 |    10    11    25 |    14    12    40 |    13     8    20 |
esa | esa 2948 |     8     7    24 |U    9    10    30 |     7     6    17 |
gfz | gfz 2919 |U   10     9    21 |U   16    17    59 |    11     9    23 |
grg | grg 2948 |     9     9    24 |U   10    12    41 |    12     8    20 |
igr | igr 2909 |     9     8    24 |    12    11    37 |     8     7    20 |
igs | igs 2904 |     7     7    19 |    12    10    33 |     7     6    17 |
jpl | jpl 2852 |U    9     9    25 |    14    13    40 |U   12     9    19 |
mit | mit 2962 |U    7     8    20 |U   17    19    53 |U    8     7    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 5.1521.0   GPS week: 1521   Day: 0   MJD: 54891.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     6    21 |     7     8    23 |     8     6    18 |
emr | emr 2964 |     9     9    22 |     9    13    36 |    11     9    19 |
esa | esa 2976 |     7     6    26 |     5     8    24 |     8     5    18 |
gfz | gfz 2933 |     8     9    17 |    11    12    49 |    14    12    29 |
grg | grg 2976 |    10     9    27 |     8    11    32 |    11     5    21 |
igr | igr 2895 |     6     6    21 |     6    10    28 |     8     5    17 |
igs | igs 2952 |     7     6    22 |     7    10    30 |     8     5    17 |
jpl | jpl 2964 |     8     7    24 |     8    11    32 |    12    10    18 |
mit | mit 2976 |     6     6    18 |    15    13    50 |     9     7    21 |

Table 5.1521.1   GPS week: 1521   Day: 1   MJD: 54892.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     7     8    23 |     6     9    25 |     8     5    21 |
emr | emr 2964 |    10    12    24 |    12    13    55 |    13     7    25 |
esa | esa 2976 |     8     9    24 |     6     7    26 |     8     4    19 |
gfz | gfz 2936 |     8    10    21 |    10    11    64 |    12     5    23 |
grg | grg 2976 |     9    11    21 |     8    10    35 |    11     8    24 |
igr | igr 2962 |     7     8    20 |     7     7    25 |     8     5    20 |
igs | igs 2952 |     6     8    15 |     9     7    26 |     8     5    18 |
jpl | jpl 2867 |     9    13    26 |    14    11    34 |    16     8    22 |
mit | mit 2976 |     6     8    16 |    20     9    46 |     8     5    20 |

Table 5.1521.2   GPS week: 1521   Day: 2   MJD: 54893.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2964 |     7     6    19 |    12    13    33 |     6     7    13 |
emr | emr 2958 |     9     9    27 |    14    14    31 |    11     8    16 |
esa | esa 2976 |     8     6    22 |    13    13    35 |     6     7    13 |
gfz | gfz 2923 |     9     9    24 |    17    23    77 |     8    10    20 |
grg | grg 2976 |     9    11    22 |    13    12    46 |    14    13    23 |
igr | igr 2930 |     8     7    19 |    12    14    32 |     7     7    14 |
igs | igs 2913 |     8     7    18 |    12    13    33 |     7     8    15 |
jpl | jpl 2866 |     8     6    23 |    13    14    36 |     8     8    17 |
mit | mit 2976 |    10     8    18 |    19    27    57 |     9    11    24 |

Table 5.1521.3   GPS week: 1521   Day: 3   MJD: 54894.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     5    19 |     6     6    21 |     6     5    14 |
emr | emr 2964 |     9     8    21 |    12    10    36 |     8     9    15 |
esa | esa 2976 |     7     5    21 |     6     7    22 |     6     5    14 |
gfz | gfz 2930 |    13    12    28 |    18    21    69 |    12    12    24 |
grg | grg 2976 |     7     6    24 |     9    14    37 |    12     7    21 |
igr | igr 2927 |    13    11    37 |    20    12    63 |     9    11    36 |
igs | igs 2920 |     6     5    16 |    11     8    34 |     6     6    16 |
jpl | jpl 2868 |     7     7    21 |    19    12    43 |     9     9    15 |
mit | mit 2976 |     6    14    19 |    15    15    67 |     7     6    19 |

Table 5.1521.4   GPS week: 1521   Day: 4   MJD: 54895.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     7     8    18 |     7    11    29 |     6     6    15 |
emr | emr 2964 |    10    12    23 |    19    10    35 |    19     8    26 |
esa | esa 2976 |     8    10    22 |     8    10    31 |     7     6    16 |
gfz | gfz 2938 |    10     9    21 |    21    15    53 |     9    10    20 |
grg | grg 2880 |     8     8    19 |    10    12    45 |    10     8    16 |
igr | igr 2856 |     8     9    17 |    13    10    35 |     8     6    18 |
igs | igs 2867 |     8     8    17 |    19     9    37 |     7     7    15 |
jpl | jpl 2768 |    11    12    24 |    15    12    40 |     9     7    22 |
mit | mit 2976 |     8     7    22 |    21    49    53 |     8     6    19 |

Table 5.1521.5   GPS week: 1521   Day: 5   MJD: 54896.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2974 |     8     8    26 |    12    10    28 |     8     8    24 |
emr | emr 2868 |    14    14    35 |    14    13    37 |    17    10    19 |
esa | esa 2880 |     9    11    31 |    12    13    32 |    10     9    24 |
gfz | gfz 2837 |    10     6    23 |    18    26    53 |    12    11    27 |
grg | grg 2880 |    10    13    28 |    14    15    49 |    13     9    20 |
igr | igr 2827 |    11    11    38 |    13    11    36 |    10     9    20 |
igs | igs 2771 |     8     9    28 |    12    11    30 |    10     8    22 |
jpl | jpl 2769 |    10    14    30 |    17    18    45 |    20    10    24 |
mit | mit 2880 |    10     8    30 |    14    13    38 |    10     9    26 |

Table 5.1521.6   GPS week: 1521   Day: 6   MJD: 54897.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     5    22 |    10    10    36 |     6     6    17 |
emr | emr 2964 |     9    11    21 |    16    12    51 |    10     7    18 |
esa | esa 2880 |     8     5    23 |    12    13    38 |     6     6    18 |
gfz | gfz 2936 |     8    10    16 |    15    14    51 |     8     6    23 |
grg | grg 2976 |     7     8    25 |    12    13    42 |    11     6    17 |
igr | igr 2967 |     6     6    20 |    11    11    44 |     7     5    16 |
igs | igs 2954 |     6     6    16 |    12    11    41 |     7     5    16 |
jpl | jpl 2866 |     8     7    28 |    14    13    48 |    13     7    16 |
mit | mit 2976 |     6     5    14 |    17    11    57 |     9     7    19 |


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 6.1521   GPS week: 1521   MJD: 54891.500-54897.500

                                                         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 |       2     -25      87      -1     -1 |       5     18
            |      16      27      99      35     12 |       3
emr   uuuuu |     -22     -55      85     -36      4 |      35     42
            |      16      18      83      94     14 |       9
esa   uuuuu |       4     -11      53     -10    -13 |      23     35
            |      33      21      65      78     20 |       6
gfz   uuuuu |       0       9       8     -61      6 |       1     20
            |      12      15      85      39      7 |       6
grg   xxxxx |     -29     -33      68     -27     13 |      -1     33
            |      27      31     172      54     43 |       8
igr   xxxxx |      11      16      47    -129     -6 |      14     23
            |      13      23      61      50      6 |       5
irf   xxxxx |       7       5     -46      27      0 |       8     21
            |       7       7      32      22      6 |       7
jpl   uuuuu |      14       9      64     -66    -11 |      -1     26
            |      24      26     150      92      8 |       5
mit   uuuuu |      17       1    -149     270     11 |      17     28
            |      14      14      83      66      9 |      10
ngs   uuuuu |     -14      -5      51    -193     -3 |      -2     13
            |      63      28      48      77     11 |       3
sio   uuuuu |      -1      81    -176     120     -2 |      31     38
            |      17      24      88      62      4 |       8


Table 7.1521.0   GPS week: 1521   Day: 0   MJD: 54891.500

                                                         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 |       7       4      13     -34    -13 |       1     19
emr   uuuuu |     -39     -40      94     109     21 |      21     30
esa   uuuuu |      36     -41     165    -152     23 |      10     32
gfz   uuuuu |       5      27     -76     -29      3 |      -9     20
grg   xxxxx |      -5      15    -231     -59     10 |      -6     50
igr   xxxxx |      20       2     -37    -143     -3 |       6     23
irf   xxxxx |       8      -7     -24      36      6 |      -4     22
jpl   uuuuu |      35       4    -180      99    -13 |      -7     32
mit   uuuuu |      13     -16     -73     201     14 |       1     20
ngs   uuuuu |     -41      34      38    -155    -18 |      -6     16
sio   uuuuu |     -19      48    -138     169     -2 |      18     33

Table 7.1521.1   GPS week: 1521   Day: 1   MJD: 54892.500

                                                         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     -26      18       2     -9 |       3     19
emr   uuuuu |      -8     -51      40      33     18 |      27     37
esa   uuuuu |      55     -17      82     -74      0 |      19     36
gfz   uuuuu |       5      32     -67    -102     12 |      -5     20
grg   xxxxx |     -79     -37     -60     -18    -33 |     -11     45
igr   xxxxx |      23     -28      -8    -197      1 |      10     24
irf   xxxxx |      16       4     -55      -1      7 |       1     22
jpl   uuuuu |      16      26      55     -36      1 |      -4     31
mit   uuuuu |      34       4    -157     235     21 |       7     24
ngs   uuuuu |    -138     -12     123     -81    -17 |      -4     14
sio   uuuuu |      -7      47    -173      73      2 |      24     35

Table 7.1521.2   GPS week: 1521   Day: 2   MJD: 54893.500

                                                         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     -59     -66      15    -11 |       7     17
emr   uuuuu |     -24     -68     224       4     12 |      34     41
esa   uuuuu |      18      13      61      11    -32 |      26     36
gfz   uuuuu |      -8       6     -98     -80      4 |       0     19
grg   xxxxx |     -51     -62     163     -78    -13 |      -9     45
igr   xxxxx |       9      33     123     -85    -12 |      16     24
irf   xxxxx |      -2      14     -82       2      1 |       7     20
jpl   uuuuu |      -2     -19     246     -19     -9 |       3     25
mit   uuuuu |      -1      18    -214     188     18 |      14     26
ngs   uuuuu |      -5     -44      31    -157     -1 |      -2     12
sio   uuuuu |     -19     103    -231      54      1 |      30     37

Table 7.1521.3   GPS week: 1521   Day: 3   MJD: 54894.500

                                                         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 |      19       4     176       6      9 |       7     18
emr   uuuuu |     -19     -80     135     -58      4 |      39     45
esa   uuuuu |     -23     -32      73      60    -15 |      28     36
gfz   uuuuu |       6       6      76     -43     14 |       3     19
grg   xxxxx |     -12     -20      36      64    -12 |      -1     32
igr   xxxxx |       8      25      11     -67     -9 |      19     24
irf   xxxxx |      -1       4     -76      11      3 |      11     20
jpl   uuuuu |       0      31     196    -117     -9 |       6     25
mit   uuuuu |      12       8    -239     262     19 |      20     29
ngs   uuuuu |      31      19       1    -228     -4 |       1     11
sio   uuuuu |      -9      84    -267      52      0 |      36     39

Table 7.1521.4   GPS week: 1521   Day: 4   MJD: 54895.500

                                                         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 |      21     -62     189      59      5 |       7     17
emr   uuuuu |     -45     -70     113     -80      1 |      41     47
esa   uuuuu |     -32      18     -15       6    -15 |      26     33
gfz   uuuuu |      14       0      50     -82     14 |       4     21
grg   xxxxx |     -29     -74     287      20     -2 |       8     20
igr   xxxxx |     -13      12     118     -82     -3 |      17     22
irf   xxxxx |      12      12     -63      43     -1 |      13     21
jpl   uuuuu |     -19     -33     164    -177    -25 |       2     19
mit   uuuuu |      32       1    -175     359      7 |      23     33
ngs   uuuuu |      50     -12     108    -162      6 |       1     11
sio   uuuuu |       7      84    -280     164     -1 |      37     40

Table 7.1521.5   GPS week: 1521   Day: 5   MJD: 54896.500

                                                         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 |     -19     -12     131     -51     -8 |       8     17
emr   uuuuu |     -22     -43     -21    -181    -14 |      43     48
esa   uuuuu |     -17      -6      29      71    -37 |      27     33
gfz   uuuuu |     -21      -9      97     -93     -5 |       7     20
grg   xxxxx |     -17     -10     175     -36     47 |       6     20
igr   xxxxx |       2      35      64    -173    -13 |      17     22
irf   xxxxx |       9       9     -26      42    -10 |      14     21
jpl   uuuuu |      15      31      22    -137    -14 |      -1     22
mit   uuuuu |      26      13    -181     327     -2 |      27     33
ngs   uuuuu |      23     -31      58    -269     11 |       1     11
sio   uuuuu |      28     104     -79     208     -9 |      38     41

Table 7.1521.6   GPS week: 1521   Day: 6   MJD: 54897.500

                                                         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     -25     152      -2     17 |       4     21
emr   uuuuu |      -1     -31      13     -76    -14 |      42     48
esa   uuuuu |     -10     -13     -26      10    -13 |      22     38
gfz   uuuuu |      -4      -2      78       4      3 |       5     23
grg   xxxxx |     -12     -44     106     -82     93 |       5     19
igr   xxxxx |      24      36      58    -153      0 |      14     25
irf   xxxxx |       7       0       7      55     -5 |      12     23
jpl   uuuuu |      53      20     -52     -72    -11 |      -6     28
mit   uuuuu |       5     -19      -3     315      0 |      26     34
ngs   uuuuu |     -16       9       2    -301      6 |      -2     15
sio   uuuuu |      10      95     -60     117     -7 |      36     41



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