[IGSREPORT-17312] Wk 1525 IGS Final Orbits

Jim Ray IGS.ACC at noaa.gov
Thu Apr 16 05:36:19 PDT 2009


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IGS Electronic Report   16 Apr 05:36:41 PDT 2009      Message Number 17312
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Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1525   (Mar 29, 2009 - Apr 04, 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:

igs1525[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1525[0-6].clk  IGS GPS satellite and station clocks in SP3 format.
igs1525[0-6].cls  IGS GPS clock combination summary report.
igs15257.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs15257.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  |  EMR   | MIZU
                0  |  GFZ   | 7 29 MATE YAKT
                0  |  GRG   | NLIB
                0  |  MIT   | 5 19 5 19 BOR1
                1  |  COD   | NISU NRIL ULAB
                1  |  EMR   | HARB
                1  |  ESA   | MAL2
                1  |  GFZ   | 7 29 BOGT CRO1 EIL1 FAA1 GLPS GUAT IRKT SCUB SSIA
                1  |  GFZ   | YELL
                1  |  GRG   | NLIB
                1  |  MIT   | BOR1
                2  |  COD   | MATE PRE1
                2  |  EMR   | WTZR
                2  |  GFZ   | 7 29 CONZ HRM1 IRKT MAL2 REYK
                2  |  GRG   | JPLM KHAJ MANA NLIB NOVM WTZR ZECK
                2  |  MIT   | 5 5 ADE1 BUE1 EIL1
                3  |  COD   | BOR1
                3  |  EMR   | MIZU
                3  |  ESA   | ALGO BHR1 CAS1 COCO DRAO HOLM KARR KERG KIT3 MAS1
                3  |  ESA   | MDVJ NLIB PERT QAQ1 SCH2 VILL YELL
                3  |  GFZ   | 7 29 IRKT KERG KOUR
                3  |  GRG   | NLIB
                3  |  MIT   | KOUR HRAO KOUR NNOR NTUS SHAO
                4  |  ALL   | 1 1 18
                4  |  COD   | HARB NISU THU3
                4  |  EMR   | MIZU
                4  |  GFZ   | 7 29 HARB IRKT THU3
                4  |  GRG   | NLIB
                4  |  MIT   | 5 5 HARB KERG MDVJ
                5  |  ALL   | 1 1
                5  |  COD   | TWTF TWTF
                5  |  EMR   | 21 21 MIZU
                5  |  ESA   | 4
                5  |  GFZ   | 7 8 29 GUAT IRKT SSIA TWTF
                5  |  GRG   | BOR1 GLSV JPLM KHAJ NLIB NOVM SYOG
                5  |  MIT   | 5 5 MAS1 MAS1
                6  |  ALL   | 1
                6  |  EMR   | HARB HARB
                6  |  GFZ   | 7 29 IRKT
                6  |  GRG   | NLIB
                6  |  JPL   | HARB
                6  |  MIT   | 5 26 5 26 HOB2

 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
               ----+------------+----------
               G18 | 2009_04_02 | 2009024 
               G18 | 2009_04_03 | 2009024 

 6. Velocity changes were estimated to alleviate the effects of modeling
    problems, experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G01 |  4 |  4 |  2 |  2 |  1 |    |    |

 7. Starting on 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) all IGS products,
    including the IGS combined orbits, are based on the IGS realization of the
    ITRF2005 reference frame (IGS05).   For more information see IGSMAIL #5447.

 8. Small rotations were applied to the all AC orbit and ERP values in order
    to align them to the IGS05. These rotations were estimated in the process
    of the IGS SINEX combination, performed at NRCan by Remi Ferland, are based 
    on the common stations between the individual AC SINEX solutions and the 
    IGS05.snx SINEX. The estimated 7 transformations, from which only 
    the 3 rotations are applied to the orbit and ERP values, are:
    
            |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+---------------------------------------------------
       COD  |     .1     .4     .1     -24    -19     -6    -.04
       EMR  |   11.4   -6.1   -1.0      59     29     51     .07
       ESA  |    4.0     .0     .2      -8    -33     26     .04
       GFZ  |     .8    1.1    1.6      20    -17     13    -.42
       GRG  |    4.7     .5   -5.1       8    -22     25    -.02
       JPL  |    1.7    3.3   13.2     -13    -30     -6     .22
       MIT  |    6.1   -8.7    1.9     -20     23    -40    -.08
       NGS  |   10.2   -5.0   -3.1     -61   -160     18     .16
       SIO  |    6.3   -1.2   10.3     -33    -69    -21     .12


 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 1.1525.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1525.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 2.1525.[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 3.1525.[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 5.1525.0-6).

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 1525 summary.                       (Mar 29, 2009 - Apr 04, 2009)

Table 1.1525.a   GPS week: 1525   MJD: 54919.000-54925.000

         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  241|    0     0     1    16   -19   -14  -.11    8    8 |    -244    -608     15    110
        |    0     0     1     8    14    23   .02           |     174     845
emr   82|    0     0     6  -147  -127   -39   .49   19   19 |    1683     565     17    168
        |    1     2     1    23    23    19   .02           |    1635     954
esa  123|    0     0     0   -27   -20   -15   .34   10   10 |     369    -563     20    145
        |    0     1     1    14    50    28   .04           |     884    1992
gfz  199|    0     0    -3   -54   -19    94  -.09   11   11 |     -46     136     23    146
        |    0     0     1    20    16    39   .04           |     424     973
grg  115|    0     1    -6   -49     4    43  1.08   34   32 |   34592   10923    207   6868
        |    1     1     3    24    26    18   .04           |  101890   26825
igr  n/a|    0     0     0   -30   -41     6   .05    6    5 |    -902     765     21     65
        |    0     0     1    14    18    29   .04           |    1809     917
jpl  134|    0     2     2     3    21   -17   .61   18   18 |     964     642     18     96
        |    2     1     0    31    10    28   .02           |    3079     815
mit  266|    0    -2    -2    18  -126   -30  -.32   12   12 |     -75     372     20    136
        |    0     0     0    30    33    13   .03           |     345     730
ngs  220|    0     0     0   104   203   -11  -.39   11    9 |    -414    -624   2245   4038
        |    0     0     1    20    50    16   .03           |     480    1033
sio  262|    0     0     0    29    92     7   .07   21   20 |     ---     ---    ---    ---
        |    1     1     1    28    31    26   .02           |     ---     ---


Table 1.1525.b   GPS week : 1525   MJD: 54919.000-54925.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1525.0   GPS week: 1525   Day: 0   MJD: 54919.000                            

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  241|    0     0     3    14    -1     0  -.12    8    8 |    -237    -261     14    109
        |                     18   -20                       |
emr   82|   -1     1     7  -177  -106   -63   .51   21   21 |     923     265     20    213
        |                     44   -21                       |
esa  123|    0     0     0   -32  -104     8   .31    8    8 |     562    -413     18    125
        |                     37   111                       |
gfz  199|    0     0    -4   -47    -9    88  -.05   11   11 |      18     513     22    155
        |                      9     0                       |
grg  115|    1     1   -12   -50   -21    32  1.13   34   34 |     -49     503    225    299
        |                     82   -18                       |
igr  n/a|    0     1    -2   -24   -22   -15   .08    6    6 |   -2300     668     25     84
        |                     10   -30                       |
jpl  134|    2     2     2   -18    10   -44   .60   19   19 |    2659     439     20    113
        |                     -4   -25                       |
mit  266|    0    -3    -2    24  -151   -31  -.32   11   11 |     -80     505     21    148
        |                     13    41                       |
ngs  220|    0     0    -2   104   291    -5  -.36   10    9 |    -261    -265   2498   4299
        |                     -3     7                       |
sio  262|    0    -1    -1    16    51   -23   .07   22   22 |     ---     ---    ---    ---
        |                     -4   -73                       |

Table 2.1525.1   GPS week: 1525   Day: 1   MJD: 54920.000                            

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  241|    0     0     3    10   -13    14  -.12    8    8 |    -489    -162     14    134
        |                     40     3                       |
emr   82|    1     3     8  -171  -117   -50   .47   19   19 |    -103     666     14    172
        |                     18    25                       |
esa  123|    0    -2     0   -24     6    -6   .38    9    9 |    -631    2875     22    148
        |                     35    35                       |
gfz  199|    1     1    -4   -35   -43   115  -.06   12   11 |     -21     139     25    159
        |                     17    49                       |
grg  115|   -2     3    -8   -41     0    38  1.04   33   31 |    -249    -172    193    283
        |                     83    43                       |
igr  n/a|   -1     1    -1   -38   -72   -10   .07    5    5 |   -2978     922     21     65
        |                     10    13                       |
jpl  134|    1     4     3    -1     9     7   .65   19   19 |    1572     744     20    114
        |                    -42   -12                       |
mit  266|    0    -2    -2    29  -121   -44  -.31   10    9 |     -98    -102     20    159
        |                     22    38                       |
ngs  220|    0     0    -3    92   221   -40  -.36   10    9 |    -498    -162   2486   4373
        |                     24    53                       |
sio  262|    0    -1     0    55    81   -24   .04   23   20 |     ---     ---    ---    ---
        |                    -30   -61                       |

Table 2.1525.2   GPS week: 1525   Day: 2   MJD: 54921.000                            

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  241|    0     0     1    12   -18   -29  -.12    9    9 |      15   -1981     18    115
        |                    -14    26                       |
emr   82|    0    -1     4  -138  -160   -37   .51   18   18 |     521     935     15    151
        |                     14    66                       |
esa  123|    1     0     0   -22    46   -29   .35   12   12 |     843   -1474     21    127
        |                     29   -15                       |
gfz  199|    1     0    -3   -61   -12   151  -.10   12   12 |       6      30     23    141
        |                     16    47                       |
grg  115|    0     3    -2   -46    52    21  1.05   34   31 |     176    5648    225  17537
        |                      9    76                       |
igr  n/a|    0     0    -1   -37   -46    -4   .07    5    5 |   -2017    1139     20     56
        |                     -4   -38                       |
jpl  134|    0     0     2    15    39   -12   .61   18   18 |    2114     835     19     94
        |                    -37   -32                       |
mit  266|    1    -1    -2    -4   -96   -32  -.30   11   10 |     622    -979     20    127
        |                     29    33                       |
ngs  220|    0     1     0   136   132    -8  -.40   12   10 |   -1061    -652   2146   4676
        |                    -47   207                       |
sio  262|    0     0     1    -4   112    19   .07   20   19 |     ---     ---    ---    ---
        |                    -14   -75                       |

Table 2.1525.3   GPS week: 1525   Day: 3   MJD: 54922.000                            

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  241|    0     0     0     6   -27    15  -.08    7    7 |    -297    -273     15    106
        |                     62    47                       |
emr   82|   -2     1     4  -161  -148   -64   .50   18   18 |    1310     775     17    155
        |                     37    62                       |
esa  123|    1     0     2   -17     0   -70   .35   14   14 |     759   -1664     26    246
        |                     28    22                       |
gfz  199|    0     0    -3   -22   -10   108  -.06   11   11 |    -344     981     22    131
        |                     38    61                       |
grg  115|    0     1    -5   -90     8    50  1.13   36   32 |      39     491    183    264
        |                     82    58                       |
igr  n/a|    0     0     0   -53   -42   -31   .07    5    5 |   -1029    1025     21     74
        |                     -4   -35                       |
jpl  134|   -1     2     3   -41    20   -18   .60   17   17 |    1500     783     19     96
        |                      3    42                       |
mit  266|    0    -1    -2    55   -96   -48  -.28   13   12 |    -341     829     21    136
        |                     18    25                       |
ngs  220|    1    -1    -1    68   173    -4  -.43   12   10 |    -503      70   1779   3583
        |                      9   141                       |
sio  262|   -1     0     1    64   115   -12   .12   20   22 |     ---     ---    ---    ---
        |                     -7   -80                       |

Table 2.1525.4   GPS week: 1525   Day: 4   MJD: 54923.000                            

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  241|    1     0    -1    21    -8   -40  -.11    8    8 |     -67      45     16     85
        |                     28   -11                       |
emr   82|    0     0     6  -136  -104   -17   .51   18   18 |    1419    1224     19    134
        |                     30    23                       |
esa  123|    2     1     0   -42   -66     8   .35    9    9 |       0   -1080     19    130
        |                     30    69                       |
gfz  199|    1     0    -1   -65     1    90  -.14   11   11 |    -256     270     25    148
        |                     21    10                       |
grg  115|    2     0    -5   -41    -4    54  1.08   36   35 |    -142    -220    188    264
        |                     15   -36                       |
igr  n/a|   -1     0     1   -24   -20    32   .04    5    5 |    -793    1261     19     57
        |                     -8   -45                       |
jpl  134|   -3     2     1    21    24   -58   .62   16   16 |    1611    1256     15     89
        |                    -10    30                       |
mit  266|    0    -1    -2    14  -190   -11  -.34   13   12 |    -183     656     21    129
        |                     22    39                       |
ngs  220|    0     0     1   110   223    -8  -.36    9    9 |    -274    -144   2112   3321
        |                    -51    61                       |
sio  262|    0     2     0    21    49    34   .08   20   19 |     ---     ---    ---    ---
        |                      3   -79                       |

Table 2.1525.5   GPS week: 1525   Day: 5   MJD: 54924.000                            

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  241|    0     0     0    19   -22   -31  -.15    7    7 |    -389      42     15    119
        |                     76    64                       |
emr   82|   -1     0     6  -125  -106   -29   .48   19   19 |    3052    1498     21    209
        |                     42    40                       |
esa  123|    1     0     0    -4   -25   -20   .27    8    8 |    -717    1041     19    123
        |                    -22    64                       |
gfz  199|    0     0    -3   -66   -20    87  -.13    9    9 |    -524     927     22    153
        |                     26    67                       |
grg  115|    1     1    -6   -65   -23    77  1.05   34   30 |  -22505   71545    253  29132
        |                     62    30                       |
igr  n/a|   -1     0     1   -26   -32    50  -.03    5    5 |     535    1562     20     62
        |                    -28   -34                       |
jpl  134|    0     0     1    -6    30   -20   .58   18   18 |    3167    1472     19     95
        |                     14     1                       |
mit  266|    0    -2    -2    43  -119   -19  -.37   14   13 |       2    1292     19    132
        |                     39     9                       |
ngs  220|    0     0     0   102   209   -24  -.38   13   11 |    -774    -301   2297   3839
        |                    -87    90                       |
sio  262|   -2     1     1    53   105    15   .07   21   20 |     ---     ---    ---    ---
        |                     21   -70                       |

Table 2.1525.6   GPS week: 1525   Day: 6   MJD: 54925.000                            

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  241|    0     0     2    30   -47   -29  -.10    8    8 |    -246   -1667     17    107
        |                     13    65                       |
emr   82|    0    -2     4  -119  -146   -17   .46   17   17 |    4659   -1405     16    147
        |                      9    78                       |
esa  123|    0     0    -1   -45    -2     0   .35   11   11 |    1772   -3227     18    120
        |                     11    54                       |
gfz  199|    0     0    -4   -83   -39    19  -.07   11   11 |     797   -1908     23    140
        |                      1    75                       |
grg  115|    1     0    -4   -11    21    33  1.08   33   28 |  264878   -1332    183    300
        |                     -7    49                       |
igr  n/a|   -1     1     0    -6   -54    23   .04    7    7 |    2268   -1218     27     63
        |                    -61    30                       |
jpl  134|    0     2     2    55    18    25   .62   17   17 |   -5875   -1035     16     73
        |                    -60    51                       |
mit  266|    1    -1     0   -36  -108   -24  -.32   14   12 |    -451     409     24    126
        |                     36     2                       |
ngs  220|    0     0     0   115   173    13  -.43   10    8 |     470   -2915   2397   4176
        |                   -104   165                       |
sio  262|   -1     0     1    -1   128    39   .07   22   21 |     ---     ---    ---    ---
        |                     32   -77                       |

       
       
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 3.1525.0   GPS week: 1525   Day: 0   MJD: 54919.000                            

        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  |    2  ---  ---  ---  ---  153  ---  ---  ---  ---    0 |    56  ---  ---  ---  ---   87  ---  ---  ---  ---    56
   2  |    7   22    8   12   37    4   21    9    7   21    4 |    26   42   30   24   51   27   35   23   27   21    26
   3  |    9   18    7    9   29    4   11   13    9   18    4 |    21   35   25   19   35   21   30   14   23   32    21
   4  |    6   18    6    6   39    4   13   12    9   16    3 |    36   46   44   36   64   39   48   40   41   47    40
  X5  |    6   21   16   12  ---   11  ---   19   15  ---    6 |    19   29   15   31  ---   21  ---   23   35  ---    24
   6  |    9   18    6    7   29    5   11   11    8   22    4 |    17   30   21   16   32   17   28   14   23   36    19
   7  |    8   22    9   15   27    6   21   12   11   14    5 |    17   26   18   19   37   16   24   15   27   14    17
   8  |   10   18    8    7   33    6   10    9    9   11    3 |    11   22   18   15   29   13   19   15   24   12    14
   9  |    8   15    9    7   27    6   14   13   11   16    4 |    16   25   19   19   27   17   23   21   28   25    19
  10  |    7   13    9   10   30    4   13    9   11   23    4 |    24   21   27   29   29   23   22   21   32   15    24
  11E |   10   36    7   13   39    5   18   16    8   17    5 |    16   51   25   29   49   22   27   22   26   16    21
  12  |    8   14   10   10   38    8   21    9   12   36    5 |    21   28   25   22   41   21   31   21   35   24    23
  13  |    6   26    8   12   42    6   20   11   12    9    4 |    13   32   17   14   42   14   25   15   25   13    14
  14  |    9   19    9    7   24    8   23   17    8   20    5 |    14   24   20   18   32   14   25   17   20   12    16
  15  |    8   22    9   10   26    4   25    9   11   24    5 |    16   26   21   16   32   14   26   16   24   22    17
  16  |    6   24    7   13   32    7   22   10    9   28    5 |    21   29   22   21   38   19   32   21   27   22    21
  17  |    6   27   10    7   31    6   23    9   12   11    4 |    20   32   20   19   44   21   32   23   25   21    19
  18  |    9   20    8   12   50    7   24   14   10   32    5 |    13   27   20   20   35   19   26   16   19   21    18
  19  |    7   26    9   10   27    7   21    8    7   14    4 |    21   36   23   19   46   22   36   21   27   22    22
  20  |    7   24    9   14   22    4   22   17    9   25    5 |    21   30   25   31   35   22   25   29   24   23    21
  21  |   11   25   10   11   29    7   19   10   13   28    5 |    19   29   20   20   37   15   25   14   29   30    19
  22  |    9   19    8    8   55    8   21   12    7   26    4 |    27   34   33   35   39   31   33   35   35   29    31
  23  |    6   30    7   14   26    5   26   11   11   19    5 |    15   35   18   16   39   17   32   15   27   14    16
  24  |    6   15    9    7   23    5   12    9   13   25    4 |    18   27   21   18   34   16   25   16   27   27    19
  25  |    7   20    5   10   25    7    9   11   10   25    4 |    13   23   14   17   29   14   21   17   25   27    15
  26  |    6   18    7    8   25    8   14    9   10   21    4 |    14   23   21   19   29   15   25   15   24   29    18
  27  |    7   21    7    7   22    6    9    8    9   18    3 |    14   27   20   15   28   16   22   14   22   23    16
  28  |    5   17    8   11   34    7   16   13    9   26    4 |    22   29   25   22   35   22   26   25   26   25    22
  29  |    6   23    8   10   34    7   26   10   10   21    5 |    23   34   26   24   28   23   39   23   34   25    26
  30  |    3   13    6    5   45    5   14   10    9   20    3 |    27   30   33   28   23   27   26   32   34   23    29
  31  |    6   24    7   17   38    5   22   10   10   17    5 |    18   29   20   22   48   17   27   15   24   13    17
  32  |   10   19    9   15   39    6   23   13    8   25    5 |    14   23   20   25   47   18   20   22   19   19    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   21    8   11   34    6   19   11   10   22      |T   20   30   22   21   37   21   27   20   27   22    21
 WRMS |    8   21    8   11   34    6   19   11    9   22      |NE  20   29   22   21   36   21   27   20   27   22    21
 MEDI |    7   20    8   10   30    6   20   11   10   21      |MD  18   29   21   20   35   19   26   21   26   22    19

Table 3.1525.1   GPS week: 1525   Day: 1   MJD: 54920.000                            

        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  |    2  ---  ---  ---  ---   84  ---  ---  ---  ---    0 |    87  ---  ---  ---  ---  123  ---  ---  ---  ---    86
   2  |    7   20    8   14   41    4   22    9   14   19    5 |    17   34   21   15   43   18   32   17   19   18    17
   3  |    9   16    7   11   22    5   14   14    7   19    4 |    21   29   28   20   29   23   30   25   21   32    22
   4  |    8   16    9   12   43    5   16    7   15   50    6 |    68   75   77   66   80   69   78   71   73   84    71
  X5  |   10   26   17   16  ---   12  ---   11   23  ---    7 |    15   27   13   22  ---   17  ---   19   37  ---    17
   6  |    9   15    8   10   27    5   11   12    8   23    4 |    16   28   26   18   29   19   28   20   17   33    18
   7  |    8   21   10   16   27    6   21   10   13   13    5 |    12   26   17   16   37   13   22   12   19   13    12
   8  |   10   16    7   10   30    5   12    9    9   10    4 |     9   24   13   15   27   13   20   14   17   14    11
   9  |    8   12    6    6   19    4   14   10   11   17    3 |    13   25   18   17   26   14   23   17   21   27    15
  10  |    7   12    8   10   28    7   12    6   11   20    3 |    13   24   17   18   28   18   24   11   19   13    14
  11E |    7   27    9   30   44    6   17   10    7   19    6 |    15   37   20   33   48   20   25   18   16   22    16
  12  |    8   15    8   10   42    6   21    8   14   33    5 |    14   26   20   20   34   17   28   18   26   22    16
  13  |    6   25   10   10   51    7   20    8   10   12    4 |    12   30   18   15   37   14   22   16   18   13    13
  14  |    8   18   11   10   26    6   25   11    9   15    4 |    10   20   19   13   31   13   22   16   13   16    11
  15  |   10   20   12   14   23    3   23    8   10   19    5 |    11   25   18   14   31   11   25   13   12   13    11
  16  |    8   19   10   14   33    5   21   11   11   27    5 |    16   26   21   16   34   17   28   18   21   16    15
  17  |    6   24   11   10   35    5   25    8    9   12    4 |    17   36   18   24   37   23   34   23   23   20    20
  18  |    9   21    8   16   42    4   25   10   10   28    5 |    10   29   17   19   30   16   26   14   17   17    13
  19  |    8   17   11   10   26    5   21    8    8   14    4 |    19   26   23   18   40   20   29   19   22   20    19
  20  |    8   22   10   13   31    5   25   13    8   20    5 |    17   29   28   23   33   19   28   23   22   21    19
  21  |   11   18   11   11   30    7   21    7   13   23    5 |    15   27   19   15   34   14   27   14   24   24    16
  22  |    8   20   12   12   51    7   24    9    8   27    5 |    16   29   27   24   32   21   29   23   19   25    20
  23  |    7   23    9   10   30    5   24    7   10   17    4 |    11   30   17   13   32   13   24   12   16   12    11
  24  |    7   14    7    8   20    4   13    8   10   24    4 |    17   28   21   17   27   18   27   19   23   29    18
  25  |    9   15    7   11   24    4   10    9   10   23    4 |    12   21   16   16   32   14   20   17   21   27    14
  26  |    7   19    8    8   25    3   15    9    9   20    4 |    13   26   21   16   29   13   23   15   17   28    15
  27  |    8   16    7    9   17    3   11    5   11   17    3 |    11   26   16   14   27   13   23   11   15   23    13
  28  |    6   19    7    7   31    5   16    5    9   27    4 |    16   29   21   21   30   20   27   18   24   18    18
  29  |    8   18    8   10   27    6   25   10   12   19    4 |    16   29   23   22   29   20   32   21   31   20    20
  30  |    4   12    7    6   34    5   13   11   10   19    3 |    18   23   22   18   20   16   20   25   26   20    18
  31  |    8   22    9   17   34    7   17   15   12   21    5 |    19   28   19   18   38   16   26   13   19   14    15
  32  |   11   20   13   11   34    6   26   19    8   30    6 |    17   24   28   20   39   19   22   26   14   23    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    9   12   33    5   19   10   10   23      |T   18   28   22   19   34   21   27   19   22   22    19
 WRMS |    8   19    9   11   31    5   19    9    9   20      |NE  18   28   22   19   33   21   27   19   22   22    19
 MEDI |    8   19    9   10   30    5   20    9   10   19      |MD  15   27   20   18   32   17   26   18   19   20    16

Table 3.1525.2   GPS week: 1525   Day: 2   MJD: 54921.000                            

        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  |    2  ---  ---  ---  ---   61  ---  ---  ---  ---    0 |    95  ---  ---  ---  ---  121  ---  ---  ---  ---    95
   2  |    8   17   11   10   46    4   19    7   10   17    4 |    19   31   20   16   45   19   29   18   19   19    18
   3  |    8   14    8    9   29    3   10   12   11   16    4 |    21   30   25   19   30   22   27   23   22   30    21
   4  |    8   18   12    7   30    5   15   10    8   11    4 |    36   42   38   34   46   39   42   37   37   42    37
  X5  |   12   29   10   22  ---   18  ---   15   23  ---    8 |    13   30   13   31  ---   33  ---   23   27  ---    19
   6  |    8   14   10    8   27    5   10   12    9   19    4 |    14   29   23   15   29   20   25   19   18   30    17
   7  |    9   15   15   14   28    5   20   10   11   13    5 |    12   24   17   14   38   16   23   15   20   14    13
   8  |    9   18   12   10   18    3   10    9   11    9    4 |     9   23   14   13   27   14   17   16   23   16    12
   9  |   11   16   14   12   21    4   11   12   11   15    4 |    12   24   17   21   26   14   20   17   23   23    14
  10  |    8   13    6    9   28    5    9    6   13   21    4 |    15   19   23   19   25   21   20   15   23   21    16
  11E |   10   29   17   20   45    7   20   12   13   16    6 |    17   44   23   32   49   23   28   24   22   26    22
  12  |    9   13   14   11   46    5   19   11   14   29    5 |    13   26   22   18   37   17   26   17   23   19    16
  13  |    8   16   13   12   60    4   19    8   14    9    4 |    14   28   21   15   41   17   25   18   19   15    15
  14  |   10   22   11   10   33    6   24    9   13   13    5 |     9   28   17   13   29   14   22   15   16   15    12
  15  |   11   24   14   14   23    4   22    9    7   19    5 |    11   26   16   13   33   13   24   17   15   16    12
  16  |    7   19   11   16   26    5   20   13   10   26    5 |    16   25   20   17   31   19   28   21   23   19    17
  17  |    8   21   17    9   28    4   24   10   11   24    5 |    22   30   14   18   29   24   33   26   22   23    20
  18  |   11   19   11   18   53    4   25   12   10   28    6 |    14   28   20   20   31   17   27   13   16   15    16
  19  |    6   20   13   12   29    6   18    9   10   16    4 |    18   32   20   18   41   18   28   20   21   21    18
  20  |    9   20   11   11   28    7   23   15   12   23    5 |    20   30   29   24   35   21   29   26   22   25    22
  21  |    7   17   11   14   33    6   16   10   10   21    4 |    15   25   22   12   39   14   23   15   23   22    15
  22  |    9   18   11   11   60    4   24   10   12   21    5 |    22   30   25   26   33   23   28   26   24   23    22
  23  |    8   23   11   12   29    5   25   11   13   19    5 |    13   30   20   13   35   16   27   15   18   14    14
  24  |    8   14   11    9   21    3   11   11   14   21    4 |    15   24   20   15   28   14   24   12   23   24    15
  25  |   11   15   11   13   19    5   11   11   13   23    5 |    12   22   19   17   30   16   20   20   20   27    15
  26  |   10   14   11   11   26    4   14   12   10   17    4 |    12   21   13   15   32   12   23   15   18   22    12
  27  |    7   18   13    9   20    3   10   10   10   16    4 |    12   25   17   13   31   14   22   12   15   20    13
  28  |    9   18   13   11   27    5   19    6   15   28    5 |    19   28   22   23   31   22   26   23   29   20    20
  29  |    8   19   12   13   31    7   21   13   21   15    5 |    17   31   20   16   32   21   32   19   31   17    19
  30  |    7   10    8    8   25    5   12    9    9   18    3 |    20   25   26   21   30   21   20   25   27   18    22
  31  |    9   23   13   22   29   10   18   11   15   20    6 |    13   30   20   20   39   16   26   15   24   17    14
  32  |   10   18   11   12   36    7   23   16   14   25    6 |    19   24   23   21   37   23   24   26   19   19    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18   12   12   34    5   18   11   12   20      |T   18   27   20   18   33   22   25   19   22   21    19
 WRMS |    9   18   12   12   31    5   18   10   10   19      |NE  18   27   20   18   33   22   25   19   22   20    19
 MEDI |    8   18   11   11   28    5   19   11   11   19      |MD  15   28   20   18   32   18   25   18   22   20    16

Table 3.1525.3   GPS week: 1525   Day: 3   MJD: 54922.000                            

        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  |    2  ---  ---  ---  ---   98  ---  ---  ---  ---    0 |   103  ---  ---  ---  ---  130  ---  ---  ---  ---   104
   2  |    7   20   15   13   38    4   20   12   11   17    5 |    21   34   26   17   42   21   31   18   17   20    19
   3  |   10   16   11   10   29    3   11   15   12   19    4 |    20   32   31   19   34   22   29   21   23   32    20
   4  |    8   20   19    7   42    6   13   18   13   10    5 |    42   46   55   42   59   44   49   44   39   45    43
  X5  |   14   21  ---   22  ---   15  ---   15   22  ---    9 |    12   28  ---   35  ---   29  ---   19   37  ---    21
   6  |    8   14   12   11   31    5    9   13   14   21    4 |    15   29   25   18   30   21   23   17   25   31    17
   7  |    5   18   10   16   34    5   18   13   10   14    4 |    13   25   16   18   40   13   23   13   16   15    12
   8  |    8   15    9    9   21    4   11   10   12   11    3 |     8   23   16   12   27   15   18   16   18   15    11
   9  |    8   22   17    6   18    4    9   17    8   17    5 |    12   29   17   15   26   15   21   18   21   23    14
  10  |    5   12   14   12   24    4   10    8   11   19    4 |    13   23   21   25   24   20   20   17   22   16    16
  11E |    7   20   14   24   43    5   19   11   10   20    5 |    15   30   19   28   49   19   29   17   19   18    16
  12  |    6   16   15    9   49    6   16   11   10   29    4 |    17   28   28   21   39   20   27   19   22   19    18
  13  |    6   15   10   10   61    4   17    9    9   11    4 |    14   25   19   13   46   16   24   15   22   17    15
  14  |    8   22   17   11   32    4   24    8   11   16    5 |    10   28   20   18   37   17   26   13   19   17    13
  15  |    8   23   13   11   29    5   21   11   15   18    5 |    13   29   21   14   38   17   26   15   19   19    15
  16  |    8   19   16   13   42    6   23   14   13   29    6 |    18   31   30   22   43   24   33   20   29   26    20
  17  |    6   19   18   10   35    5   21   13   12   25    5 |    18   31   24   22   39   24   30   25   28   25    21
 X18  |    7   25   17   13   59    7  ---   12   16   30    6 |    11   32   18   17   35   15  ---   13   17   19    13
  19  |    5   19   13   11   27    6   20   13   11   18    4 |    19   30   23   15   40   19   31   20   23   23    19
  20  |    6   19   12   12   35    5   21   13    8   27    5 |    19   32   24   26   36   24   29   28   24   27    21
  21  |    6   21   14    9   39    5   18   13   13   27    5 |    16   29   22   16   42   17   24   16   26   27    15
  22  |    6   17   13   11   75    5   18   12   14   23    5 |    23   32   25   29   54   23   29   26   31   23    24
  23  |    5   21   10   10   35    5   23   13   10   20    5 |    15   28   18   13   42   17   29   15   21   18    15
  24  |    6   15    9    7   21    5   15   12   13   18    4 |    23   33   27   23   31   22   33   20   32   27    23
  25  |    9   20   10   10   22    5   10   14   13   22    4 |    14   30   18   17   31   14   24   16   22   29    15
  26  |    6   16   11    8   26    3   12   17   13   17    4 |    15   26   20   18   28   17   24   17   19   22    16
  27  |    6   15   14    6   17    3   10   12   14   17    4 |    13   26   23   16   25   17   24   13   19   21    15
  28  |    6   16   17    9   28    5   19   10   10   28    5 |    21   29   28   24   44   26   29   23   26   24    22
  29  |    8   27   13   12   32    8   23   14   11   15    5 |    21   40   25   18   30   23   37   21   28   20    22
  30  |    5   13   17    5   46    5   12   12   11   20    4 |    20   26   38   22   20   23   25   26   28   21    22
  31  |    6   18   11   16   33    5   22   11    9   19    5 |    14   27   23   21   42   19   27   15   18   17    15
  32  |    9   16   14   10   31    4   20   12   10   25    5 |    16   24   25   18   36   20   22   22   20   19    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   18   14   11   36    5   17   13   12   20      |T   19   29   24   20   36   23   27   19   23   22    20
 WRMS |    7   18   14   11   32    5   17   12   10   22      |NE  19   29   24   20   36   24   27   19   23   22    21
 MEDI |    6   19   13   10   32    5   18   12   11   19      |MD  15   29   23   18   37   20   27   18   22   21    17

Table 3.1525.4   GPS week: 1525   Day: 4   MJD: 54923.000                            

        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  |   32  ---   21  ---  ---   37  ---   25   43  ---   18 |    91  ---  103  ---  ---  106  ---   95  110  ---    99
   2  |    8   23    7   12   38    7   19   14    8   16    4 |    20   32   23   20   43   21   30   18   24   18    21
   3  |   10   13    8    8   22    4    8   11   10   18    4 |    20   29   25   21   30   21   31   21   27   33    23
   4  |    8   22   11    8   69    5   11   17    9   10    4 |    22   31   31   23   58   22   35   25   27   29    24
  X5  |   17   18  ---   24  ---   15  ---   14   34  ---   11 |    18   34  ---   41  ---   24  ---   19   39  ---    26
   6  |   10   13   10   11   30    6    9   12   11   22    4 |    16   27   21   21   31   20   27   20   27   33    19
   7  |   10   17   10   15   25    5   20   17    8   13    5 |    16   23   16   17   35   12   28   17   20   14    15
   8  |   10   18    6    9   17    4   10   15   10   11    4 |    10   20   11   14   21   11   20   15   21   17    11
   9  |    9   15    9   10   22    5   10   15    7   18    4 |    15   28   22   23   31   16   25   21   25   27    19
  10  |    5   12    9    9   20    3   10   10   10   20    3 |    14   18   20   20   23   15   20   15   23   14    15
  11E |    8   23   12   18   31    6   20   11    8   20    5 |    18   36   26   28   53   23   34   22   30   21    23
  12  |    8   15    7   10   56    4   16   10   10   31    4 |    21   30   27   29   41   23   29   23   29   24    24
  13  |    7   15    8   11   49    4   18   10   10    9    4 |    13   24   16   15   41   15   27   17   20   18    14
  14  |    6   20    9    8   29    3   19   10    6   19    4 |    13   25   17   15   30   12   24   12   24   16    14
  15  |    9   21    7   12   31    5   19   10    8   17    4 |    12   26   16   13   33   12   25   13   18   18    14
  16  |    6   20    6   11   29    6   19   11   11   28    5 |    18   28   22   22   32   19   31   16   25   20    19
  17  |    7   19   14   12   28    5   21   13    9   26    5 |    20   27   20   21   32   20   33   26   28   25    21
 X18  |    5  ---    7  ---  ---   62  ---  ---  ---  ---    6 |    12  ---   18  ---  ---  114  ---  ---  ---  ---    11
  19  |    6   20   12   11   31    6   19   13   11   17    4 |    21   29   23   19   40   20   33   21   28   25    22
  20  |    9   18    9   12   44    4   19   13   10   24    5 |    14   24   21   24   38   16   27   23   19   24    17
  21  |   10   21    8    8   40    4   16   13   11   22    4 |    18   29   21   23   38   19   28   17   27   28    19
  22  |    6   17    9    6   77    5   18   13    6   24    4 |    19   27   20   20   49   17   30   20   25   21    19
  23  |    7   22    8   12   32    4   24   14    9   18    5 |    13   29   17   16   36   16   30   17   21   17    16
  24  |    7   15    9    7   15    6   13   15    8   16    4 |    15   24   23   23   27   16   27   15   22   26    19
  25  |    9   17    6   13   14    5   11   18   11   22    4 |    18   25   21   22   28   18   26   25   23   30    19
  26  |    6   16    9    9   22    4   13   14    8   14    4 |    12   25   18   18   26   13   24   17   20   21    15
  27  |    7   17    8    7   13    3   10   12   11   17    4 |    13   23   17   16   25   12   24   10   16   22    14
  28  |    7   15    8    8   35    6   13    9   10   28    4 |    18   24   22   21   29   19   26   21   31   21    21
  29  |    9   24    8   12   26    7   22   13   11   17    5 |    22   34   26   22   28   22   33   23   30   23    24
  30  |    4   12    7    7   56    5   10   11    9   19    3 |    23   29   28   32   28   24   25   27   31   19    25
  31  |    6   22   10   13   34    6   21   10    9   22    5 |    16   29   23   16   40   14   30   13   26   11    17
  32  |    9   17    7   13   23    4   17   12   10   25    4 |    14   21   20   21   27   15   21   20   17   18    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   18    9   11   36    5   16   13    9   20      |T   18   27   23   21   34   23   27   21   27   21    21
 WRMS |    8   18    9   11   35    5   16   12    9   19      |NE  18   26   23   20   33   23   27   21   27   21    21
 MEDI |    8   17    8   11   30    5   17   13   10   19      |MD  16   27   21   21   32   18   27   20   25   21    19

Table 3.1525.5   GPS week: 1525   Day: 5   MJD: 54924.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   13  ---   19  ---  ---   18  ---   26   25  ---   11 |    92  ---   82  ---  ---   93  ---   74   71  ---    90
   2  |    8   22    7   11   31    5   18   15   13   18    5 |    18   30   21   16   36   18   25   16   22   14    17
   3  |   11   13    5    9   21    4    9   14   12   26    4 |    18   25   26   20   30   19   27   24   24   39    20
   4  |    7   21    7    7   55    7   14   15   11    9    4 |    34   41   37   33   58   36   40   35   37   38    35
  X5  |   12   30  ---  ---  ---   20  ---   15   22  ---   10 |    12   31  ---  ---  ---   14  ---   20   32  ---    17
   6  |    9   12    8    7   26    5   10   15   10   25    4 |    13   21   21   15   27   12   22   18   18   35    15
   7  |    8   20    9   21   25    7   20   17   10   13    5 |    12   24   14   22   36   10   22   11   15   13    10
   8  |    9   17    6    7   28    5   10   13   11   11    3 |    10   19   13   12   24   10   15   14   18   14     9
   9  |    7   17    6    5   26    3   10   14   13   20    4 |    14   24   17   15   29   13   23   16   23   29    15
  10  |    7   12    8    8   27    3   10    9   13   23    4 |    13   17   17   19   26   15   19   16   24   14    13
  11E |    6   22    8   10   31    4   23   16   16   25    5 |    16   29   20   17   43   18   30   23   24   22    17
  12  |    7   17   10    9   43    5   19   12   14   31    5 |    18   27   22   23   31   20   29   20   33   24    21
  13  |    6   18    7    9   61    7   19   10   11   12    4 |    13   28   15   10   47   14   23   17   18   18    11
  14  |    9   22    6    5   30    5   24    8   14   17    4 |    15   25   17   15   37   14   23   12   24   15    13
  15  |    8   24   13    8   29    3   22   10   13   19    5 |    12   27   20   13   34   14   23   13   18   16    12
  16  |    7   17   10    8   26    9   19   14   11   29    5 |    17   25   20   20   29   20   27   18   23   19    16
  17  |    4   17   11   10   26    5   22   19    8   19    5 |    16   24   17   17   26   15   24   24   22   17    15
 X18  |    3  ---  ---  ---  ---   19  ---  ---  ---  ---    0 |     8  ---  ---  ---  ---   23  ---  ---  ---  ---     7
  19  |    7   21   10   10   29    4   20   15   13   17    5 |    17   27   22   14   41   14   28   20   14   22    16
  20  |    5   22    9   10   38    5   22   14   14   28    5 |    16   29   21   21   42   15   25   21   21   25    16
  21  |    8   18   10   10   40    7   13   12   14   23    4 |    17   24   21   16   39   13   22   14   21   24    14
  22  |    7   18    8   10   62    6   22   13   13   30    5 |    20   30   15   23   38   18   27   23   26   25    18
  23  |    5   23    8    8   27    6   26   15   10   16    5 |    14   31   17   11   35   13   27   17   17   16    13
  24  |    7   20   10    5   19    4   13   12   14   16    4 |    20   29   26   20   31   19   29   16   27   28    20
  25  |    8   22   10    8   23    5   11   19   10   22    5 |    18   27   21   18   31   15   22   24   21   31    17
  26  |    5   14    5    6   20    4   13   15   13   16    3 |    11   22   13   13   27   14   23   14   17   23    12
  27  |    5   21    7    5   20    5   10   14   12   16    4 |    12   24   15   14   26   14   21   11   15   19    12
  28  |    4   16    8    7   30    7   16    9   13   26    4 |    16   20   12   17   28   15   19   19   24   17    13
  29  |    8   21    9   10   28    6   24   14   16   15    5 |    21   30   23   18   32   19   31   20   30   23    20
  30  |    6   11    7    7   52    4   12   13   13   19    3 |    21   24   25   24   24   20   22   23   31   20    22
  31  |    7   20    8   11   36    6   18   11   20   20    5 |    15   29   18   17   39   15   25   13   24   16    14
  32  |    8   17    9   11   29    4   19   10   15   25    5 |    12   20   16   15   29   12   20   13   20   13    11
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    8    9   34    5   18   14   13   21      |T   18   26   21   17   33   18   24   19   24   21    17
 WRMS |    7   19    8    9   30    5   18   13   11   20      |NE  18   26   21   17   33   18   24   19   24   21    17
 MEDI |    7   18    8    8   29    5   18   14   13   19      |MD  16   25   20   17   31   15   23   18   23   20    15

Table 3.1525.6   GPS week: 1525   Day: 6   MJD: 54925.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   18  ---   21  ---  ---   20  ---   20   18  ---   11 |   115  ---   66  ---  ---  114  ---   64   64  ---   111
   2  |    8   22    8   13   38    8   21   19   12   21    5 |    23   36   24   18   45   24   32   21   23   22    22
   3  |    6   14   10    7   30    5   11   12    7   20    3 |    18   28   22   17   29   20   28   20   27   36    20
   4  |    8   16    8    6   29    6   14   20    9    8    4 |    28   35   33   31   46   33   35   39   32   33    31
  X5  |   15   20  ---   19  ---   18  ---   18   10  ---    8 |    16   37  ---   34  ---   27  ---   21   25  ---    21
   6  |    8   12    9    7   24    5    8   16    6   27    4 |    15   23   18   15   25   17   22   22   22   38    17
   7  |    7   19   12   17   32    7   20   17    8   15    5 |    17   28   20   17   39   16   27   16   22   17    16
   8  |   10   16    9    9   20    4   10   22    9   16    4 |    16   24   19   14   24   15   21   21   22   23    15
   9  |    9   15   11    7   22    6   12   13   10   19    4 |    16   25   19   14   28   18   25   15   22   24    15
  10  |    6   10   10    6   25    6    9   14    6   21    3 |    18   21   24   25   26   21   23   24   26   19    20
  11E |    9   18   10   14   45    8   22    9    5   16    4 |    26   38   29   30   60   27   36   24   26   25    26
  12  |    8   15   11    8   51    6   15   13   15   33    5 |    21   30   27   23   41   25   31   26   28   23    23
  13  |    7   16    9   11   56    8   15    9    7   12    4 |    18   30   25   17   52   19   29   23   24   25    20
  14  |    6   20   15   10   26    8   24   10    9   24    5 |    18   26   20   18   34   17   28   20   24   22    17
  15  |   10   21    7   12   30    7   19    9   14   21    5 |    17   31   23   16   36   19   28   21   24   24    19
  16  |    8   20    8   12   25    6   17   12    9   28    5 |    21   29   24   25   35   21   32   22   25   26    21
  17  |    7   20   15   14   29    7   25   17   10   25    5 |    26   29   21   22   37   27   35   36   32   32    25
 X18  |    9   22    8   16   35   17  ---   13   10   32    6 |     7   23    3    5   19   15  ---    5    7    4     8
  19  |    7   16   13    9   28    8   20   16    9   18    4 |    24   32   22   20   45   24   36   25   29   26    23
  20  |    7   22   10   10   32   10   22   14   12   28    5 |    23   31   28   27   38   22   29   29   25   31    23
  21  |    7   18    9   15   35    7   12   10    7   23    4 |    17   27   21   19   44   20   26   19   26   26    18
  22  |    6   18   14   14   47   11   24   13   12   28    5 |    24   30   28   34   34   22   29   34   26   35    26
  23  |    8   24   10   10   34   13   24   10    8   15    5 |    19   37   24   17   39   23   34   21   24   23    21
  24  |    8   16   12    8   24    6   14   11   12   23    4 |    17   27   22   17   34   19   27   14   25   32    17
  25  |    9   17   10   10   17    7   10   25   10   24    5 |    19   29   24   18   30   21   29   23   23   31    20
  26  |    7   14    6    9   25    4   12   11    9   21    4 |    18   29   23   16   31   20   26   20   24   32    19
  27  |    6   16    8    8   21    5   10   15   11   18    4 |    19   26   20   16   25   17   25   15   19   26    18
  28  |    7   15   13   13   24    7   17   12   13   30    5 |    26   30   26   25   35   25   28   29   34   28    26
  29  |    7   20   10   11   27    8   21   13    8   18    4 |    24   34   23   20   40   25   37   26   29   30    24
  30  |    6   10   12    7   50    6    8   14   10   19    3 |    26   32   34   29   25   28   28   33   28   25    28
  31  |    5   18   10    9   38   10   19   13    9   20    4 |    20   30   19   16   38   18   29   20   26   17    18
  32  |    8   16   12   12   30    8   18   10   12   20    4 |    22   27   26   25   40   22   27   22   24   20    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   17   11   11   33    7   17   14   10   22      |T   22   29   24   20   35   24   29   24   26   25    23
 WRMS |    8   17   11   11   28    7   17   12    8   21      |NE  22   29   24   20   34   24   28   24   26   25    23
 MEDI |    7   17   10   10   29    7   17   13    9   21      |MD  19   29   23   18   35   21   28   22   25   25    20



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 4.1525   GPS week: 1525   MJD: 54919.0-54925.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3039 |U    7     6    18 |U    7     8    27 |U    7     6    14 |
emr | emr 2944 |    10     8    23 |     9    10    30 |     7     6    17 |
esa | esa 2934 |     8     7    22 |U    6     8    26 |     6     5    13 |
gfz | gfz 2930 |U    8     7    21 |U    6     8    26 |     8     6    16 |
grg | grg 2852 |    17    19    49 |U   33    44   111 |    22    24    49 |
igr | igr 2957 |     8     8    19 |     7     9    27 |     7     6    17 |
igs | igs 2948 |     7     7    21 |     6     8    26 |     6     5    13 |
jpl | jpl 2824 |U   10     8    24 |U    7     9    26 |U    7     5    18 |
mit | mit 2989 |U    9     8    25 |U    7    10    31 |U    7     6    15 |



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 5.1525.0   GPS week: 1525   Day: 0   MJD: 54919.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3027 |     5     4    16 |     7     8    22 |     9     6    13 |
emr | emr 2974 |     9     6    20 |     8    10    22 |     7     5    16 |
esa | esa 2976 |     5     4    17 |     7     8    23 |     8     6    12 |
gfz | gfz 2976 |     6     3    15 |     7     8    21 |     7     6    12 |
grg | grg 2880 |    18    18    45 |    29    48   133 |    24    21    42 |
igr | igr 2976 |    11    12    26 |    11    11    28 |    12     9    34 |
igs | igs 2976 |     5     4    16 |     7     9    21 |     7     5    11 |
jpl | jpl 2878 |    16     7    26 |     7     9    23 |     9     7    21 |
mit | mit 2976 |    21    14    52 |     7     9    22 |     9     7    13 |

Table 5.1525.1   GPS week: 1525   Day: 1   MJD: 54920.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3023 |     5     4    15 |     6     8    25 |     6     7    16 |
emr | emr 2957 |     7     6    17 |     9     9    27 |     7     7    14 |
esa | esa 2976 |     6     5    15 |     6     6    22 |     5     6    14 |
gfz | gfz 2969 |     5     5    14 |     6     7    22 |    10     8    16 |
grg | grg 2880 |    15    13    34 |    32    46    96 |    15    25    36 |
igr | igr 2976 |     6     5    14 |     6     7    21 |     5     6    14 |
igs | igs 2976 |     5     5    15 |     5     7    24 |     5     6    14 |
jpl | jpl 2880 |     6     6    16 |     5     7    20 |     7     5    17 |
mit | mit 2976 |     5     4    14 |     6     8    37 |     6     6    16 |

Table 5.1525.2   GPS week: 1525   Day: 2   MJD: 54921.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3041 |     6     7    18 |     6     7    31 |     5     6    13 |
emr | emr 2971 |    10     6    23 |     8    10    32 |     8     8    15 |
esa | esa 2976 |     8     8    22 |     6     8    31 |     6     6    13 |
gfz | gfz 2971 |     8     8    23 |     6     9    29 |     6     6    15 |
grg | grg 2880 |    21    19    64 |    31    33   107 |    25    31    58 |
igr | igr 2976 |     8     8    20 |     6     9    29 |     6     6    13 |
igs | igs 2976 |     7     7    20 |     6     8    30 |     6     5    13 |
jpl | jpl 2880 |     9     7    22 |     6     9    26 |     8     6    17 |
mit | mit 2976 |     7     7    20 |     7     9    36 |     7     6    14 |

Table 5.1525.3   GPS week: 1525   Day: 3   MJD: 54922.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3048 |    10     7    15 |     8    11    30 |     7     6    13 |
emr | emr 2973 |    12     9    16 |    10    14    33 |     6     6    18 |
esa | esa 2880 |    12    10    19 |     7    10    28 |     6     4    14 |
gfz | gfz 2972 |     9     8    13 |     7     9    26 |     6     5    13 |
grg | grg 2880 |    13    10    37 |    30    66   117 |    25    23    58 |
igr | igr 2976 |    10     8    13 |     6     9    28 |     6     5    14 |
igs | igs 2976 |    10     8    13 |     7    11    30 |     6     4    13 |
jpl | jpl 2784 |     9     8    16 |     8    10    30 |     8     6    20 |
mit | mit 2976 |     8     6    11 |     8    12    32 |     7     6    16 |

Table 5.1525.4   GPS week: 1525   Day: 4   MJD: 54923.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
emr | emr 2878 |    14    13    41 |    12    10    35 |     6     5    22 |
esa | esa 2880 |    11    10    35 |     6     8    28 |     6     4    13 |
gfz | gfz 2876 |    11    10    36 |     7     9    28 |     8     7    24 |
grg | grg 2784 |    19    31    56 |    38    39    91 |    26    24    46 |
igs | igs 2880 |    11    10    36 |     6     8    28 |     4     3    14 |
jpl | jpl 2783 |    12    11    43 |     7     9    27 |     6     5    20 |
mit | mit 2976 |    12    10    38 |     8    11    33 |     7     4    16 |

Table 5.1525.5   GPS week: 1525   Day: 5   MJD: 54924.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3043 |     6     4    19 |     6     8    27 |     8     8    15 |
emr | emr 2879 |     8     6    22 |     7     9    31 |     8     6    16 |
esa | esa 2880 |     6     5    19 |     5     7    25 |     6     4    13 |
gfz | gfz 2779 |     7     6    22 |     5     7    27 |    10     5    15 |
grg | grg 2784 |    19    30    65 |    37    35   116 |    23    27    55 |
igr | igr 2880 |     6     5    18 |     5     7    27 |     6     5    10 |
igs | igs 2877 |     6     4    19 |     5     7    24 |     6     4    11 |
jpl | jpl 2784 |     7     5    19 |     6     6    25 |     7     5    15 |
mit | mit 2976 |     6     5    17 |     5     8    25 |     7     7    11 |

Table 5.1525.6   GPS week: 1525   Day: 6   MJD: 54925.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3048 |     7    10    23 |    10     8    29 |     9     6    16 |
emr | emr 2976 |    10     9    23 |     9     9    33 |     7     7    20 |
esa | esa 2976 |     8    11    27 |     8     8    27 |     7     4    15 |
gfz | gfz 2972 |     7     9    25 |     9    11    29 |     7     4    17 |
grg | grg 2880 |    13    13    41 |    32    39   118 |    17    20    50 |
igr | igr 2976 |     7     8    24 |     8     9    29 |     6     5    17 |
igs | igs 2976 |     7     9    25 |     8     8    28 |     6     5    17 |
jpl | jpl 2784 |     9    10    26 |     8    10    30 |     6     4    16 |
mit | mit 3072 |     7     9    23 |     9    11    33 |     8     7    21 |


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 6.1525   GPS week: 1525   MJD: 54919.500-54925.500

                                                         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 |      18     -26      54      74      3 |       0     16
            |      25      29      67      58      7 |       5
emr   uuuuu |       3     -22     134     176      3 |      57     60
            |      22      13      81     115     12 |       9
esa   uuuuu |      -6     -16     156    -172      0 |       2     21
            |      47      18     166      73     12 |       1
gfz   uuuuu |      -2     -13     -42      30     -2 |      12     20
            |      20      11      66      43      7 |       4
grg   xxxxx |      14     -41      56      93      6 |      -2     40
            |      35      29      86      72     47 |       3
igr   xxxxx |      62      18      42      -3     -3 |       0     18
            |      26      14     110      38     14 |       2
irf   xxxxx |      42       6     -61      36      1 |       2     19
            |      14      13      51      18     10 |       7
jpl   uuuuu |      35      25    -126     -19      6 |       9     22
            |      26      23     183      52      6 |       6
mit   uuuuu |      16     -20    -179     112      9 |      17     26
            |      28      21     150      22     10 |       9
ngs   uuuuu |     -61      43      10    -140     -7 |       2     13
            |      60      37      78     127      8 |       3
sio   uuuuu |     116       5     106     229      5 |      39     43
            |      18      32      92      56     10 |       9


Table 7.1525.0   GPS week: 1525   Day: 0   MJD: 54919.500

                                                         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 |      46      -3     116     138     -2 |      -7     14
emr   uuuuu |      47     -29     309     358     14 |      44     46
esa   uuuuu |     -85     -22    -112    -194    -12 |       2     19
gfz   uuuuu |      26       6     -36      33     -7 |       7     13
grg   xxxxx |      44     -67     131     144     58 |      -3     44
igr   xxxxx |      56       5    -151      35    -29 |       0     14
irf   xxxxx |      26      15      23      47     11 |      -8     14
jpl   uuuuu |      51      19    -174    -121     -5 |      -1     15
mit   uuuuu |     -15       2      58      92     19 |       4     12
ngs   uuuuu |      19      18      11     -24     -7 |      -2     10
sio   uuuuu |      99      19     201     200     15 |      26     29

Table 7.1525.1   GPS week: 1525   Day: 1   MJD: 54920.500

                                                         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 |      27     -25       6      39     -6 |      -6     14
emr   uuuuu |       5      -3      94     279     12 |      46     49
esa   uuuuu |      -5     -20     101    -191     -3 |       1     19
gfz   uuuuu |     -19      -2     -44      30      0 |       6     12
grg   xxxxx |     -13     -68     -42     128    -37 |       2     48
igr   xxxxx |      17       5     -28      -9    -10 |      -3     16
irf   xxxxx |      30      15     -10      35      9 |      -6     14
jpl   uuuuu |      42      57    -408     -15     10 |       1     14
mit   uuuuu |      -8      -7     -11     120     17 |       7     15
ngs   uuuuu |     -23      -9      23    -145    -14 |      -1     10
sio   uuuuu |      91      45     153     212     10 |      28     32

Table 7.1525.2   GPS week: 1525   Day: 2   MJD: 54921.500

                                                         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      16      15     164      6 |      -3     17
emr   uuuuu |     -21     -12      97     190     14 |      53     58
esa   uuuuu |      60     -27     399    -243     -4 |       2     21
gfz   uuuuu |      -2     -14    -170      12     -1 |      10     20
grg   xxxxx |     -31      -7     -67     113    -38 |       3     48
igr   xxxxx |      83       6      49     -70      3 |      -2     17
irf   xxxxx |      45       2     -59      33     11 |      -1     20
jpl   uuuuu |      77      39    -268      47     14 |       6     22
mit   uuuuu |      12     -27    -156     145     22 |      13     26
ngs   uuuuu |    -162      49      30    -233    -11 |       2     13
sio   uuuuu |     120      16      88     270     15 |      35     41

Table 7.1525.3   GPS week: 1525   Day: 3   MJD: 54922.500

                                                         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     -42     -44      11     11 |       1     18
emr   uuuuu |     -12     -17      96     100      7 |      59     64
esa   uuuuu |      28      -8     235    -243      4 |       2     21
gfz   uuuuu |     -11     -18     -66     -11     13 |      13     22
grg   xxxxx |      -8     -62     145     -29     -7 |      -7     40
igr   xxxxx |      85      24     176     -13     12 |       0     19
irf   xxxxx |      50      20     -91      42      1 |       5     21
jpl   uuuuu |       8      17     160     -24      6 |      11     25
mit   uuuuu |      25       2    -236     113      9 |      20     31
ngs   uuuuu |     -91      11     -43     -90    -12 |       3     14
sio   uuuuu |     130      27      31     288     11 |      42     47

Table 7.1525.4   GPS week: 1525   Day: 4   MJD: 54923.500

                                                         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 |      45     -23      79      42     -3 |       3     18
emr   uuuuu |      11     -25     131     101     -9 |      62     66
esa   uuuuu |     -35     -25      77    -158     -3 |       2     21
gfz   uuuuu |      24     -16     -26      92     -9 |      15     23
grg   xxxxx |      70     -10      23     170    -21 |      -1     32
igr   xxxxx |      79      13      90      35     -6 |       1     19
irf   xxxxx |      34       5    -115      62    -11 |       7     21
jpl   uuuuu |       4      15      -3       6      2 |      13     25
mit   uuuuu |      -5     -17    -297     131     -3 |      23     32
ngs   uuuuu |     -27      56      99    -150      6 |       3     14
sio   uuuuu |     113       2      24     267     -6 |      45     49

Table 7.1525.5   GPS week: 1525   Day: 5   MJD: 54924.500

                                                         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     -75      56      89      6 |       4     18
emr   uuuuu |       3     -41     146     184     -5 |      65     68
esa   uuuuu |     -21      23     107     -31     -5 |       2     21
gfz   uuuuu |     -24     -25      19      78     -5 |      16     23
grg   xxxxx |      13     -61      81      18      6 |      -2     33
igr   xxxxx |      77      29      18      24      3 |       1     19
irf   xxxxx |      43       1    -107       5    -10 |       9     20
jpl   uuuuu |      42     -13    -100       2      7 |      14     26
mit   uuuuu |      34     -38    -307      86     -3 |      26     33
ngs   uuuuu |     -47      88      81    -356      4 |       4     15
sio   uuuuu |     113     -20      10     126     -5 |      47     51

Table 7.1525.6   GPS week: 1525   Day: 6   MJD: 54925.500

                                                         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     -32     148      30     11 |       5     18
emr   uuuuu |     -10     -28      67      20    -13 |      67     69
esa   uuuuu |      14     -30     286    -144     25 |       3     21
gfz   uuuuu |      -7     -20      31     -24     -2 |      16     24
grg   xxxxx |      19     -12     119     107     81 |      -2     33
igr   xxxxx |      38      42     140     -27      5 |       1     19
irf   xxxxx |      68     -19     -70      28     -6 |       9     20
jpl   uuuuu |      17      41     -88     -33      5 |      15     27
mit   uuuuu |      66     -55    -306      96      3 |      28     34
ngs   uuuuu |     -97      85    -132      17    -14 |       5     16
sio   uuuuu |     145     -51     237     238     -6 |      48     51



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