[IGSREPORT-17441] Wk 1531 IGS Final Orbits

Jim Ray IGS.ACC at noaa.gov
Thu May 28 05:45:25 PDT 2009


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IGS Electronic Report   28 May 05:45:57 PDT 2009      Message Number 17441
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Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1531   (May 10, 2009 - May 16, 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:

igs1531[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1531[0-6].clk  IGS GPS satellite and station clocks in SP3 format.
igs1531[0-6].cls  IGS GPS clock combination summary report.
igs15317.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs15317.sum      Complete report.

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

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

 2. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1478, a new solution from CNES/GRGS (GRG) is included for
    evaluation and statistics only.

 3. The following centre clock solutions, which provide broadcast clock
    corrections, were excluded from the combination but kept in the combination
    statistics:
             -> Centre: NGS 

 4. The following clock solutions were excluded from the combination because they
    were biasing the combined clock solutions (clock shifts/outliers) but were
    kept for the RMS computation.  Duplicate entries can arise due to separate
    combination runs for the 30-s clocks ACs (listed first) and the 5-min clock
    ACs (listed second).
    
               Day | Centre | PRN/STA list
               ----+--------+---------------
                0  |  ALL   | 1 1
                0  |  COD   | 8 25 8 9 25 27 MATE YAR2
                0  |  EMR   | IRKT MIZU NLIB
                0  |  ESA   | 9 25
                0  |  GFZ   | 7 29 FAIR MATE
                0  |  GRG   | PIE1
                0  |  JPL   | 8
                0  |  MIT   | 5 10 5 10 DAEJ AMC2 DAEJ NLIB
                1  |  ALL   | 1 1
                1  |  COD   | 8 25 8 9 25 27
                1  |  EMR   | MIZU
                1  |  ESA   | 9 25 KIT3
                1  |  GFZ   | 7 UNSA WTZR
                1  |  GRG   | NLIB
                1  |  JPL   | 8
                1  |  MIT   | 5 19 5 19 USNO
                2  |  COD   | 8 25 8 25 GUAT
                2  |  EMR   | MIZU WTZR
                2  |  ESA   | 8 9 25 PERT UNSA
                2  |  GFZ   | 7 CHUR FAA1 IRKT WUHN ZECK
                2  |  GRG   | PIE1
                2  |  JPL   | MDVJ
                2  |  MIT   | 5 5 KHAJ MDVJ
                3  |  ALL   | 1 1
                3  |  COD   | 8 9 25 27 8 9 25 27
                3  |  ESA   | 9 25 27
                3  |  GFZ   | 7 27 CHUR FAA1 GRAZ IRKT
                3  |  GRG   | NLIB ZECK
                3  |  JPL   | 8 9
                3  |  MIT   | 5 5
                4  |  ALL   | 1 1
                4  |  COD   | 8 9 25 8 9 25
                4  |  EMR   | MIZU WTZR
                4  |  ESA   | 9 25 30
                4  |  GFZ   | 7 8 29 BHR1 BJFS GOLD HARB HYDE IISC KIT3 SHAO TSKB
                4  |  GFZ   | TWTF ULAB UNSA WUHN
                4  |  GRG   | NLIB
                4  |  JPL   | ZWE2
                4  |  MIT   | 5 27 5 27 SYDN
                5  |  COD   | 8 9 25 27 RCMN
                5  |  EMR   | MIZU WTZR
                5  |  ESA   | 8 9 25 27 29 UNSA
                5  |  GFZ   | 7 8 29 ALIC BRFT CHUR HOB2
                5  |  GRG   | NLIB
                5  |  JPL   | 29
                5  |  MIT   | 2 5 14 15 17 22 2 5 USNO
                5  |  NGS   | 1
                6  |  ALL   | 1 1
                6  |  COD   | 8 9 25 27 8 9 25 27 BHR1
                6  |  EMR   | 7 7 SPT0 FAIR MIZU SPT0 WTZR
                6  |  ESA   | 8 9 25 27 UNSA
                6  |  GFZ   | 8 31 FAIR ONSA
                6  |  GRG   | NLIB
                6  |  MIT   | 5 5 COCO

    
 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
               ----+--------+--------+-------------
                5  |  MIT   | ~00:00 | ~ -0.43 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
               ----+------------+----------
               G27 | 2009_05_12 | 2009032 

 7. The following orbit solutions were excluded from the combination because 
    they were biasing the weighted average (generally indicated by long arc RMS).
    They were still used for statistics computation.
    
               Day | Centre | PRN list
               ----+--------+---------------
                0  |  MIT   | ALL (high Transformation - See Table 2)
                1  |  MIT   | ALL (high Transformation - See Table 2)
                2  |  MIT   | ALL (high Transformation - See Table 2)
                3  |  MIT   | ALL (high Transformation - See Table 2)
                4  |  MIT   | ALL (high Transformation - See Table 2)
                5  |  MIT   | ALL (high Transformation - See Table 2)
                6  |  MIT   | ALL (high Transformation - See Table 2)

 8. 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.

 9. 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  |     .5     .5    -.1     -28    -16    -24     .08
       EMR  |    6.9  -20.9   -4.1      91    -15    174     .16
       ESA  |    3.8   -4.7    6.9      16    -38     78     .24
       GFZ  |    -.1     .1    2.2      17     22     19    -.22
       GRG  |    4.8   -3.7   -4.1      -4     -3      9    -.04
       JPL  |    3.1    -.4    -.1      10    -21     -8     .49
       MIT  |    8.8  -10.4    4.0    -507   -592   -418    -.06
       NGS  |   13.5   -7.4    4.0     -82   -203     29     .05
       SIO  |     .6   -2.7   -9.4     -24    -40      1     .42


10. 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.

11. 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.

12. 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 1.1531.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1531.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 2.1531.[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 3.1531.[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 5.1531.0-6).

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 1531 summary.                       (May 10, 2009 - May 16, 2009)

Table 1.1531.a   GPS week: 1531   MJD: 54961.000-54967.000

         Mean and standard deviations of transformation parameters to the 
         combined IGS orbit.
         WRMS - orbit RMS weighted by the SP3 header accuracy codes.
         STA  - Mean number of stations in the daily solutions.
   
CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  232|    0     0     0    24   -61   -31  -.25    9    8 |    -589     339     17     75
        |    0     0     1    11    10    27   .02           |     253     609
emr   77|   -1    -1     0  -140   -30   -25   .31   19   19 | -283144    -310     21     97
        |    1     1     1    24    25    29   .04           |  489705     847
esa  125|    0     0     0   -45   -37    41   .26    9    9 |    -309    -912     21    128
        |    0     0     1    16    33    33   .03           |     802    1668
gfz  192|    0     1     2   -42  -128    26  -.08   11   11 |      23     -90     23    135
        |    1     1     1    15    16    59   .03           |     396     594
grg  109|    1    -1    -4   -35   -47   -76   .93   41   36 |     -55    -111    103    235
        |    2     1     4    27    22    56   .04           |     460     785
igr  n/a|    0     0     0   -13   -89   -34   .03    6    5 |   20682    -149     23     75
        |    0     0     0    18    12    90   .03           |     846     977
jpl  108|    0     0    -2   -32   -53   -29   .43   19   18 |    2389     -92     19    101
        |    1     1     1     8    13    15   .04           |     751     826
mit  313|    0    -1     0   993  1076  -440  -.31   13   11 |  -11864   -1809     21    162
        |    0     0     1    23    35    16   .03           |    5685    1219
ngs  215|    0     0    -1   151   304    -9  -.41   12    9 |   92740    1088   2195   3939
        |    0     0     1    21    32    13   .03           |  107560   68078
sio  251|   -4     3     2    47     7     5   .06   24   24 |     ---     ---    ---    ---
        |    1     1     1    36    40    31   .05           |     ---     ---


Table 1.1531.b   GPS week : 1531   MJD: 54961.000-54967.000   

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



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 2.1531.0   GPS week: 1531   Day: 0   MJD: 54961.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  232|    0     0    -1    34   -56   -23  -.27   10    9 |    -759     523     16     65
        |                    -35    -4                       |
emr   77|   -2    -3     3  -104    -3    11   .33   19   19 | -999999     804     23     98
        |                    -87   -75                       |
esa  125|    0     0    -1   -50   -78    32   .27   10   10 |   -1718    1765     22    147
        |                     83    45                       |
gfz  192|    1     2     4   -71  -122   -26  -.08   12   12 |    -695     968     21    156
        |                     33     1                       |
grg  109|    2    -1     1   -77   -83  -153   .99   40   38 |    -769    1234     95    234
        |                     76    61                       |
igr  n/a|    0     0    -1   -37   -95   156   .07    6    6 |   19583    1613     28     82
        |                     36    25                       |
jpl  108|    0     1    -3   -29   -63   -22   .41   20   19 |    1774    1223     21    120
        |                    -11     0                       |
mit  313|    0    -1     0   961  1075  -431  -.36   13   11 |  -14356   -1896     20    130
        |                   -491  -590                       |
ngs  215|    0    -1     0   165   338   -24  -.36   13   10 |   14366   -4908   2743   4315
        |                   -119   -52                       |
sio  251|   -3     5     2     9   -12    31  -.03   26   25 |     ---     ---    ---    ---
        |                     15   -91                       |

Table 2.1531.1   GPS week: 1531   Day: 1   MJD: 54962.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  232|    0     0    -1     2   -44   -16  -.25    8    8 |    -367     -72     13     62
        |                     24   -28                       |
emr   77|   -2    -2     0  -133     7   -59   .37   19   19 |    3658   -1153     21     97
        |                    -72  -104                       |
esa  125|    0     0     0   -23   -87    34   .22    9    9 |    -136   -2743     21    125
        |                     24    82                       |
gfz  192|    0     1     4   -29  -138    78  -.07   12   12 |     507    -649     24    130
        |                     18    -9                       |
grg  109|    0    -1    -7   -49   -35   -52   .96   40   37 |     762   -1139     78    231
        |                    141   -22                       |
igr  n/a|   -1     1     0   -41   -98  -106   .02    6    6 |   21065    -987     23     57
        |                     38     2                       |
jpl  108|    0     0    -2   -38   -42   -18   .43   19   18 |    2864   -1192     18     92
        |                     -5     2                       |
mit  313|    0    -1    -1  1016  1044  -462  -.32   13   11 |  -11691   -3487     22    141
        |                   -494  -591                       |
ngs  215|    0     0    -3   123   343   -29  -.40   12    8 |  194711   65389   1913   3751
        |                     49   -52                       |
sio  251|   -5     3     3   102   -41   -34   .05   25   23 |     ---     ---    ---    ---
        |                     -6  -111                       |

Table 2.1531.2   GPS week: 1531   Day: 2   MJD: 54963.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  232|    1     0     0    29   -78   -53  -.26   10    9 |    -686     807     21     75
        |                     -8    34                       |
emr   77|   -2     0     0  -116   -23   -42   .30   20   20 |    2000    -284     23     89
        |                    -67   -68                       |
esa  125|    0    -1     0   -47   -34    20   .26    8    8 |     271   -1951     19    124
        |                     51    27                       |
gfz  192|    0     2     2   -53  -146    89  -.06   12   12 |    -237     141     24    128
        |                     40    12                       |
grg  109|   -2     0    -8   -17   -62   -15   .92   39   35 |    -278     -55     91    216
        |                     82    99                       |
igr  n/a|    0     0     1    -6  -102   -54   .05    5    4 |   19720     -37     19     61
        |                     46    37                       |
jpl  108|    1     0     0   -39   -70   -24   .37   17   16 |    1285    -191     18    107
        |                     16    23                       |
mit  313|   -1    -1     1  1004  1086  -439  -.35   12   11 |     550   -1391     23    141
        |                   -497  -591                       |
ngs  215|    0     0    -1   137   281     0  -.43   11    8 |  148838   71821   1914   3603
        |                    -24    40                       |
sio  251|   -6     2     4    19    57    18   .03   25   25 |     ---     ---    ---    ---
        |                      3  -124                       |

Table 2.1531.3   GPS week: 1531   Day: 3   MJD: 54964.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  232|    1     0     2    32   -66   -67  -.23    8    8 |    -307     -22     16     64
        |                     18   -38                       |
emr   77|    1    -3     2  -152   -62   -22   .32   19   19 | -999999    -614     20     89
        |                    -21   -39                       |
esa  125|   -1     0     0   -76   -27    31   .26    9    9 |   -1033     -61     21    130
        |                     76     7                       |
gfz  192|   -1     0     1   -27  -145    80  -.08   11   11 |     264    -695     22    124
        |                     24   -14                       |
grg  109|    1    -2    -4   -23   -25  -115   .93   41   37 |      63    -711     86    223
        |                     68     0                       |
igr  n/a|    0     1     0   -10   -80  -110   .04    6    5 |   20364    -183     20     65
        |                     33   -16                       |
jpl  108|    1     0    -2   -42   -48   -27   .47   19   18 |    1775    -207     18     93
        |                    -22   -12                       |
mit  313|   -1    -1     0   996  1025  -452  -.29   12   11 |  -15012   -1376     19    119
        |                   -488  -598                       |
ngs  215|    0     0     0   141   321     0  -.44   12    9 |   10561    2695   1952   3661
        |                    -34    31                       |
sio  251|   -4     3     2    79   -25     9   .07   23   25 |     ---     ---    ---    ---
        |                    -31   -97                       |

Table 2.1531.4   GPS week: 1531   Day: 4   MJD: 54965.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  232|    1     0     1    32   -62     8  -.23    9    8 |    -449     213     16     58
        |                     17    13                       |
emr   77|   -2    -1     1  -178   -47   -61   .31   16   16 |    4039     -47     18     88
        |                     -9   -32                       |
esa  125|    0     0    -1   -47   -20     0   .22    9    9 |    -264     472     23    123
        |                     45     9                       |
gfz  192|    0     1     1   -34  -127    41  -.10   11   11 |     115     248     22    131
        |                      5     8                       |
grg  109|    3    -1    -7     6   -60  -113   .96   41   37 |    -117     503     88    217
        |                     34    60                       |
igr  n/a|    0     1     0     6   -87   -48   .00    6    5 |   21842     -54     21     74
        |                    -24     4                       |
jpl  108|   -2    -1     0   -21   -57   -10   .48   18   18 |    3156     117     19     82
        |                     -9     8                       |
mit  313|    0    -1     0  1004  1074  -449  -.29   13   11 |  -12258   -3279     17    118
        |                   -487  -608                       |
ngs  215|    1     0    -2   166   311     0  -.41   13    9 |    4663   10932   2667   4256
        |                     10    40                       |
sio  251|   -2     3     0    68     5   -26   .07   24   24 |     ---     ---    ---    ---
        |                     -6   -93                       |

Table 2.1531.5   GPS week: 1531   Day: 5   MJD: 54966.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  232|    1    -1     0    13   -56   -54  -.26    9    8 |   -1032    1366     25    144
        |                    -14    13                       |
emr   77|   -1     0     0  -148   -45    -1   .25   19   19 |    4395   -1479     24    143
        |                    -66    19                       |
esa  125|    0     1     1   -36     3    86   .24   10   10 |     141   -1497     23    135
        |                     44    -1                       |
gfz  192|    0     0     1   -38  -105   -29  -.06   10   10 |     255    -472     28    174
        |                    -14    -2                       |
grg  109|    2    -3    -8   -40   -21   -82   .90   43   37 |      91    -416    190    316
        |                     25    98                       |
igr  n/a|    0     0     0     1   -93   -62  -.03    5    5 |   21432   -1504     30    121
        |                     12    15                       |
jpl  108|    1     0    -2   -22   -31   -46   .46   19   18 |    2969    -930     25    125
        |                    -22    17                       |
mit  313|    0    -1     0   959  1133  -413  -.29   13   12 |  -16158      -6     27    357
        |                   -488  -610                       |
ngs  215|    0     0    -1   185   256     2  -.40   14   10 |   13289   -3326   1871   4089
        |                    -14   101                       |
sio  251|   -4     3     1    10    64    52   .07   24   22 |     ---     ---    ---    ---
        |                     21  -117                       |

Table 2.1531.6   GPS week: 1531   Day: 6   MJD: 54967.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  232|    1     0     0    23   -69   -13  -.23    9    8 |    -526    -440     14     63
        |                     15    51                       |
emr   77|   -1    -2     0  -147   -38    -5   .26   19   19 |    3897     602     18     76
        |                    -72   -41                       |
esa  125|    0     0     0   -36   -17    87   .31   10   11 |     574   -2372     22    112
        |                     30    -9                       |
gfz  192|    0     0     1   -38  -112   -45  -.13   12   12 |     -45    -177     23    104
        |                     -2     4                       |
grg  109|    4    -1     0   -49   -45     0   .88   42   34 |    -143    -196     93    209
        |                    106    48                       |
igr  n/a|   -1     1     0    -8   -65   -12   .03    6    5 |   20772     104     21     67
        |                     -8   -54                       |
jpl  108|    1     1    -3   -32   -59   -54   .40   18   17 |    2900     530     18     90
        |                    -39    13                       |
mit  313|    0     0    -1  1010  1100  -433  -.29   14   12 |  -14127   -1234     21    133
        |                   -482  -608                       |
ngs  215|    0     1    -2   144   280   -15  -.39   13    9 |  262755 -134984   2310   3899
        |                    -66    37                       |
sio  251|   -2     2     1    43     7   -11   .13   25   23 |     ---     ---    ---    ---
        |                     38   -84                       |

       
       
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 3.1531.0   GPS week: 1531   Day: 0   MJD: 54961.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   15  ---  ---  ---  ---   32  ---  145   23  ---   19 |    21  ---  ---  ---  ---   32  ---   95   26  ---    21
   2  |    9   26   15   13   28    5   24   19   14   20    6 |    16   28   23   15   40   22   28   18   23   21    19
   3  |    7   14   10   10   29    4   10   10    8   26    4 |    28   35   34   37   36   36   34   30   31   33    32
   4  |    9   22    7   12   34    6   13   18    9   24    5 |    13   28   18   17   32   18   23   16   12   29    15
  X5  |   14   28   10  ---  ---   17  ---   11   16  ---    9 |    18   33   17  ---  ---   29  ---   20   30  ---    20
   6  |    6   16    9   11   33    5    9    7    8   19    4 |    20   27   26   30   22   30   26   22   21   29    24
   7E |    9   18   11   12   29    7   26   13   11   22    6 |    22   27   27   24   28   26   29   22   26   27    25
   8E |   21   22    9   13   73    8   25   19   29   28    8 |    16   26   26   27   34   27   27   26   44   29    25
   9E |    9   17    9    8   57    4   19   24   15   18    5 |    66   68   60   62   59   62   65   66   73   64    63
  10  |    6   16   11    9   24    7   14    9   15   19    5 |    14   23   25   13   27   25   22   16   18   27    17
  11  |    7   23   11   13   51    5   17    8   11   17    5 |    15   27   21   19   52   20   25   15   21   17    16
  12  |   12   23   12   11   53    5   20   13   10   30    6 |    18   35   30   25   50   24   32   19   25   28    24
  13  |    8   17   13   12   37    6   28   10   12   18    6 |    18   27   27   21   39   22   26   19   19   17    18
  14  |    7   20    9   17   40    5   17    9   11   29    6 |    21   32   26   29   33   28   29   23   23   23    23
  15  |   10   19   11   14   32    5   22    8   14   24    6 |    16   28   24   19   35   22   26   17   22   20    18
  16  |    7   20   10   10   39    6   24   15   10   30    6 |    18   30   23   22   34   22   31   21   22   25    20
  17  |    9   19   10   12   46   11   18   14   17   45    7 |    24   29   23   28   42   27   30   27   30   40    23
  18  |    8   26   10   15   34    4   22    9   10   20    6 |    16   34   20   18   37   22   29   18   23   25    18
  19  |   10   19   10   15   31    6   18   12   11   33    6 |    22   35   30   30   34   32   37   23   24   39    27
  20  |    9   18    9   12   33    5   23   15   13   25    6 |    18   30   24   19   35   22   28   23   22   24    19
  21  |    8   20   10   10   51    4   13    9   11   21    5 |    18   24   21   13   34   17   22   18   21   22    18
  22  |    7   23    9   14   47    5   20   11   11   16    5 |    17   31   21   20   38   23   27   19   26   21    19
  23  |    9   18   10   13   46    6   26   11    7   24    6 |    17   28   25   20   41   21   27   18   17   15    17
  24  |   26   23   13   12   38    6   19   23   16   20    7 |    62   69   66   59   73   67   70   60   69   56    65
  25E |   11   19   12   11   52    4   23   13    6   20    5 |    11   23   22   17   41   17   29   15   16   20    14
  26  |    7   12    9    8   22    5    9   12   11   19    4 |    13   22   20   14   27   20   21   15   19   14    16
 X27E |   11   20   15   13   94    8  ---   16   39   19    9 |    10   20   13   11    8   14  ---    8   33   12    13
  28  |   10   20   13   11   30    8   21   13   12   29    6 |    20   34   27   25   40   24   28   27   25   25    20
  29  |   11   20   11    8   34    6   19    8   11   46    7 |    24   30   27   21   47   26   33   25   30   39    25
  30  |    8   13    5    8   32    5   13    8   11   20    4 |    28   30   30   31   48   32   26   28   35   29    28
  31E |    7   17   10   11   32    7   24   11   13   26    6 |    36   40   40   38   46   37   41   36   34   46    39
  32  |    9   14    8    9   36    6   20   14   12   33    5 |    18   26   25   16   32   22   25   22   24   33    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   19   10   12   40    6   20   13   13   26      |T   21   31   27   24   38   27   30   25   27   28    23
 WRMS |    9   19   10   12   38    6   19   11   10   25      |NE  20   31   26   23   38   26   29   25   25   27    22
 MEDI |    9   19   10   12   34    6   20   12   11   22      |MD  18   29   25   21   36   24   28   21   24   25    20

Table 3.1531.1   GPS week: 1531   Day: 1   MJD: 54962.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   19  ---  ---  ---  ---   24  ---  144   29  ---   24 |    20  ---  ---  ---  ---   39  ---   69   37  ---    28
   2  |    7   23   10    9   38    4   20   13   10   21    5 |    17   29   20   14   37   17   28   20   18   20    18
   3  |    7   13    5   12   37    6    9   11    9   27    4 |    23   31   28   35   32   27   32   23   24   28    27
   4  |    9   20    8   10   36    5   11   14   12   26    5 |    19   29   22   21   26   19   24   25   21   32    19
  X5  |   13   27   15  ---  ---   18  ---   13   20  ---   10 |    12   29   30  ---  ---   21  ---   15   38  ---    23
   6  |    5   13    4   11   33    7    8    7    8   18    3 |    14   19   15   22   21   15   20   15   20   17    16
   7E |    6   17    8   11   24    4   19   12   10   18    4 |    15   29   19   18   27   18   26   14   24   22    19
   8E |   18   27    8   14   60    5   21   15   30   20    8 |    10   28   14   18   32   15   23   14   37   17    14
   9E |    7   17    8    9   70    5   20   23   13   19    5 |    60   60   57   62   63   59   60   65   64   59    59
  10  |    5   15    8    9   27    7   12    7   11   23    4 |    15   23   21   16   28   20   25   16   14   31    17
  11  |    8   15    9    9   58    4   14    7    7   20    4 |    13   25   21   19   46   18   23   14   16   20    16
  12  |    8   22    9   11   48    9   24   14   12   31    6 |    16   34   26   23   41   22   32   19   22   25    22
  13  |    7   15    6   11   40    5   21   10    6   17    4 |    14   28   17   13   42   19   29   15   17   19    15
  14  |    7   24    9   18   34    5   20    9   11   27    6 |    15   30   20   23   32   20   26   16   20   20    18
  15  |    8   18   11   11   35    6   24   11   12   21    5 |    13   26   19   17   40   17   26   16   20   19    16
  16  |   10   23    8   12   32    7   24   19   10   30    6 |    17   33   23   20   33   21   32   15   21   16    20
  17  |    6   15    7    8   40    7   18   13    8   38    5 |    18   25   16   22   34   21   22   20   22   29    18
  18  |    7   25    9   13   30    7   21   10    9   21    5 |    16   34   18   17   30   18   27   15   23   21    19
  19  |    9   22    9   15   21    9   18   11    9   32    6 |    14   31   21   25   32   20   29   16   20   23    19
  20  |    8   18    8   19   32    4   20   16    6   24    5 |    14   30   18   27   36   18   25   19   19   21    17
  21  |    6   19   10   10   33    6   14    8    9   22    4 |    14   28   19   13   26   14   21   14   20   19    16
  22  |    7   24   13   11   42    8   22   10   12   17    6 |    14   30   26   18   36   17   26   15   26   17    20
  23  |    8   19    8   13   45    4   23    9    8   25    5 |    15   29   18   16   43   17   28   14   16   17    15
  24  |    7   20    7    9   38    7   14   20   11   18    4 |    27   37   29   27   45   29   38   30   28   31    28
  25E |    9   23   10   13   41    6   22   11    8   18    5 |    11   27   22   16   36   16   30   19   21   19    17
  26  |    6   12    6    6   28    7   11   13   12   21    4 |    13   23   18   12   30   16   22   13   21   16    17
 X27E |   15   19   13   12  ---    6  ---   15   43   18   10 |     9   23   14    9  ---   16  ---    9   34   12    13
  28  |    8   19    9   10   32    6   21   13   14   29    5 |    14   29   19   19   34   20   26   19   26   21    18
  29  |    8   19    6   14   46    9   17    9   14   37    6 |    15   29   15   15   33   18   26   17   22   24    16
  30  |    8   13    9   11   40    5   14    5   11   26    5 |    21   23   29   26   33   22   20   21   25   28    23
  31E |    8   18    8   10   25    6   25   12   14   20    5 |    38   50   44   39   50   40   44   41   46   45    42
  32  |    8   16    9    9   39    3   17   13    8   33    5 |    13   24   24   19   31   20   24   17   19   29    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    9   12   40    6   19   13   12   25      |T   17   29   22   21   35   21   28   20   25   23    20
 WRMS |    8   19    9   12   37    6   18   11    8   23      |NE  16   28   21   19   34   20   26   19   22   22    19
 MEDI |    8   19    8   11   37    6   20   12   11   21      |MD  15   29   20   19   33   19   26   16   21   21    18

Table 3.1531.2   GPS week: 1531   Day: 2   MJD: 54963.000                            

        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  |    7  ---  ---  ---  ---   22  ---  ---  ---  ---    0 |    18  ---  ---  ---  ---   26  ---  ---  ---  ---    23
   2  |    8   24   12   13   41    5   19   13   12   26    6 |    16   32   16   17   31   15   26   16   18   20    16
   3  |    7   14    4   11   31    4    7   11   10   27    4 |    27   32   33   36   36   33   33   28   29   34    30
   4  |    8   19    7   13   31    5    9   15    9   25    4 |    18   30   18   22   24   17   21   20   16   27    16
  X5  |   17   37   22  ---  ---   13  ---   21   12  ---   12 |    13   25   26  ---  ---   19  ---   18   21  ---    16
   6  |    7   13    5   13   27    5    7    6    9   24    4 |    16   19   18   26   19   19   17   17   19   23    15
   7E |    9   17    7   10   19    5   20    9    7   17    5 |    11   23   15   13   24   14   23   15   17   20    13
   8E |   20   27   10   14   55    7   19   12   30   21    8 |    12   28   16   18   32   13   23   16   38   16    13
   9E |   12   20    9   12   83    6   20   16   11   33    6 |    44   44   42   49   42   46   47   51   49   51    44
  10  |    9   19    8   13   26    3   12    9   13   16    5 |    11   25   19   16   24   13   18   11   15   23    13
  11  |    8   17    7    9   55    4   11    9   10   20    4 |    11   26   18   16   49   15   22   13   17   17    14
  12  |   11   25   10   16   33    5   21   19    9   32    6 |    16   33   26   26   41   21   30   19   23   27    21
  13  |   10   20   10   12   43    4   23    9    7   18    5 |    14   29   22   20   40   16   27   18   18   15    16
  14  |    7   21    7   14   32    5   19    7    9   24    5 |    16   27   21   22   35   19   26   16   21   17    18
  15  |   11   18   10   10   39    4   20   17   10   22    5 |    14   27   21   23   39   18   23   23   18   26    16
  16  |    9   23    8   10   26    5   23   12   12   31    6 |    17   31   20   19   32   19   31   17   19   20    19
  17  |    8   13   10   11   43    7   16   15    9   36    5 |    22   24   22   25   44   24   25   25   24   32    20
  18  |    9   24    8   13   27    4   20    6    7   18    5 |    13   32   19   17   35   15   24   15   20   19    16
  19  |    7   17    8   11   23    6   15   10   10   31    5 |    14   26   23   26   34   20   27   17   21   29    20
  20  |   10   20   11   15   38    4   20   12    9   23    6 |    14   29   22   21   38   17   24   19   15   19    15
  21  |    8   20    7    8   34    4   13    6    7   21    4 |    16   27   15   13   33   14   22   15   19   19    14
  22  |    9   22    9   10   39    5   19    6    9   16    5 |    13   28   20   21   36   16   21   15   19   18    16
  23  |    8   21   10   13   35    4   20   11    7   25    5 |    15   28   21   18   37   16   25   19   14   16    14
  24  |    8   18    6   12   30    3   14   17   11   19    4 |    19   31   23   21   36   19   30   21   20   25    20
  25E |   12   22    8   11   50    4   21   11    9   19    5 |    10   24   19   17   34   14   28   18   16   18    13
  26  |    8   13    8   10   24    5   11   13   12   15    4 |    12   20   15   11   35   12   19   13   17   12    12
 X27E |    7  ---  ---  ---  ---  117  ---  ---  ---  ---    0 |    62  ---  ---  ---  ---   73  ---  ---  ---  ---    61
  28  |    8   19    9   16   44    4   21   11    8   27    6 |    15   27   19   24   33   17   25   21   21   21    16
  29  |    9   18    7   14   45    6   14   11   10   35    5 |    20   30   20   21   45   19   27   22   24   24    20
  30  |    8   15    7   10   20    3   12    7   11   25    4 |    21   25   26   26   29   22   21   23   26   25    23
  31E |   10   17    7    9   35    5   19   13    6   23    5 |    23   33   28   24   45   23   29   22   26   29    25
  32  |    9   19    9   10   28    4   16   12    7   29    5 |    14   23   20   15   29   15   23   20   15   26    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   20    8   12   39    5   17   12   11   25      |T   18   27   21   21   34   20   25   19   21   23    19
 WRMS |    9   20    8   12   35    4   16   11    8   25      |NE  15   27   20   20   34   18   24   18   19   22    17
 MEDI |    8   19    8   12   34    5   19   11    9   24      |MD  15   27   20   21   35   17   25   18   19   21    16

Table 3.1531.3   GPS week: 1531   Day: 3   MJD: 54964.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   20  ---  ---  ---  ---   39  ---  143   29  ---   24 |    29  ---  ---  ---  ---   45  ---  102   28  ---    25
   2  |    6   24   11   12   31    4   23   13   12   21    6 |    19   33   22   17   35   20   32   19   21   25    19
   3  |    7   13    7   11   28    5    8   11    9   25    4 |    26   33   32   34   33   30   31   26   33   31    30
   4  |    7   15    8   12   29    5    9   10   10   23    4 |    11   22   14   17   23   14   18   16   14   27    11
  X5  |   14   24  ---  ---  ---   23  ---   19   19  ---   13 |    22   27  ---  ---  ---   18  ---   23   29  ---    21
   6  |    7   14    6   13   31    6    9    9    8   21    4 |    19   23   20   25   31   20   20   18   23   25    18
   7E |    6   15    8   10   21    4   23   12   12   13    5 |    17   25   23   17   26   16   25   16   21   22    18
   8E |   17   27   16   12   59    7   24   13   37   20    9 |    12   28   23   20   33   16   24   18   47   22    17
   9E |   12   21   12   11  119    8   18   18   13   25    6 |    54   49   50   55   59   50   49   50   57   49    50
  10  |    6   16    8    8   26    5   13   16    9   12    4 |    13   20   19   12   27   14   23   15   19   20    14
  11  |    8   18    9    9   54    5   12   10   11   19    4 |    12   28   18   16   46   16   22   15   19   19    14
  12  |    8   19    8   12   32    5   21   17   11   27    5 |    16   32   24   23   38   18   31   19   23   27    20
  13  |    5   19   10   12   38    6   22   14    9   19    5 |    16   31   22   20   41   20   29   17   20   17    17
  14  |    7   22   11   16   37    6   20    9   10   24    6 |    16   30   26   25   37   21   24   18   24   18    21
  15  |   11   20   11   10   38    4   25    9    8   23    6 |    15   28   22   19   39   18   26   18   20   25    17
  16  |   10   27    9   12   27    5   26   17   11   32    6 |    16   33   22   19   36   17   32   18   25   20    20
  17  |    7   16    6    9   27    5   19   11   10   34    5 |    20   26   22   23   28   22   28   24   28   29    21
  18  |    8   23   11   11   26    4   21    7    9   18    5 |    16   33   19   16   36   16   28   17   25   20    18
  19  |    9   17   10   11   17   11   16   10    9   29    5 |    18   31   24   26   31   26   31   22   28   30    23
  20  |    7   20    8   15   40    5   22    9    8   18    5 |    15   29   22   23   39   18   24   19   20   20    17
  21  |    7   18    8   11   33    3   15    7    8   20    4 |    15   28   18   14   35   17   25   18   26   21    18
  22  |    7   21   10   10   36    5   21    7    9   15    5 |    14   28   20   19   32   15   24   16   24   18    17
  23  |    8   22   11   13   36    6   22   12    9   23    5 |    15   32   21   21   39   18   27   15   20   15    16
  24  |    8   20    7    8   25    3   13   16   11   21    4 |    16   31   22   21   37   20   30   23   21   28    20
  25E |   12   24    8    8   55    6   19   11    8   17    5 |    11   31   17   14   36   13   29   15   18   19    14
  26  |    8   13    6    6   21    6   11   14    9   15    3 |    12   23   17   13   32   17   22   14   22   13    15
 X27E |   26   26   24   18  104   13  ---   25   27   26   11 |    48   26   20   16   39   27  ---   20   35   23    45
  28  |    9   24   11   12   36    7   23   10   13   29    6 |    17   30   24   22   30   22   25   21   33   20    20
  29  |    6   16   11   14   48    6   15   11    8   34    5 |    21   30   27   22   47   23   30   22   28   22    24
  30  |    6   12    6    8   23    5   10   10   11   26    4 |    28   25   28   28   40   29   24   29   35   32    28
  31E |    9   19   10    8   38    6   23   14    7   21    5 |    22   32   30   30   39   24   32   23   26   32    27
  32  |    9   14    9   10   33    5   15   10    8   22    4 |    14   23   23   17   30   17   23   17   20   24    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    9   11   41    6   19   12   12   23      |T   19   29   23   21   35   21   27   22   26   23    20
 WRMS |    8   19    9   11   37    5   18   11    9   25      |NE  17   28   22   20   35   20   26   22   24   22    19
 MEDI |    8   19    9   11   33    5   19   11    9   21      |MD  16   29   22   20   36   18   26   18   24   22    18

Table 3.1531.4   GPS week: 1531   Day: 4   MJD: 54965.000                            

        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  |   25  ---  ---  ---  ---   47  ---  144   38  ---   31 |    23  ---  ---  ---  ---   35  ---   88   35  ---    22
   2  |    8   19   10   11   30    5   22   12    9   22    5 |    12   26   21   17   37   17   27   17   20   23    16
   3  |    6    9    6    8   35    5    8    9    7   27    4 |    28   38   35   34   34   33   35   28   29   38    31
   4  |    7   16    9   10   27    5   12   13   10   25    4 |    10   24   13   19   34   15   22   16   15   26    12
  X5  |   14   22   12  ---  ---   20  ---   15   19  ---    9 |    15   26   14  ---  ---   17  ---   19   26  ---    17
   6  |    8    9    5   10   34    7    9    9    8   19    3 |    17   22   22   25   24   19   21   17   22   28    18
   7E |   10   15    8    9   15    7   20   15    9   17    4 |    17   26   21   20   27   19   26   22   26   24    19
   8E |   18   23   14   21   44    7   21   16   36   20    9 |    11   22   18   24   40   17   24   17   49   16    16
   9E |   15   17   11   11  113    4   19   19   12   23    6 |    36   37   29   35   36   34   37   33   38   32    33
  10  |    7   16    6    7   25    5   11   12   11   10    4 |    10   20   19   11   23   15   19   14   17   16    12
  11  |    7   13   10    9   58    3   14    9    7   19    4 |     9   23   21   15   57   13   23   14   19   18    14
  12  |   11   19   10    8   43    6   21   21   10   29    6 |    13   29   24   18   41   17   29   20   21   29    18
  13  |    8   17   10   10   47    2   22   14   11   20    5 |    10   27   17   16   40   15   28   17   22   21    14
  14  |    8   17   11   14   40    5   23   11   11   21    5 |    16   28   21   22   33   20   26   17   28   16    20
  15  |   10   19    8   10   39    6   22   10   11   18    5 |    15   27   21   16   40   16   26   18   23   17    16
  16  |    9   17   12   11   27    5   25   12   11   35    6 |    15   29   26   22   35   19   31   17   23   21    20
  17  |    9   11   12    8   29    5   19   10   13   39    6 |    18   19   19   20   31   17   25   20   28   29    17
  18  |    8   23    9   12   25    5   21    8   12   18    5 |    12   30   19   17   33   15   28   15   24   19    16
  19  |    7   14    9   10   21    8   15    9    8   32    5 |    16   30   27   25   33   24   31   21   27   33    23
  20  |    8   18    9   12   30    3   21    9   10   19    5 |    12   25   17   16   35   13   24   15   17   19    13
  21  |    8   15    7    7   33    4   17    7    9   22    4 |    13   24   12   12   36   13   23   14   23   19    14
  22  |    8   20    9   11   33    5   20   10    9   17    5 |    13   28   18   18   36   14   26   17   26   19    17
  23  |    8   16   12   11   43    5   22   11   10   24    5 |    11   26   19   14   41   15   27   16   18   16    13
  24  |    8   16    6   10   21    6   13   15   12   19    4 |    16   28   21   18   36   19   29   20   22   27    19
  25E |   12   18    8   10   52    3   16   11    8   24    5 |     9   24   19   16   35   14   28   19   20   21    14
  26  |    7    9    9    6   26    6   11   12    9   14    3 |    12   19   18   12   29   11   21   15   23   13    14
  27E |   12   16   14   13   48   11   18   17   30   20    7 |    21   19   21   19   28   19   20   18   34   23    22
  28  |    8   18   10   10   34    6   21    9   10   27    5 |    13   26   19   18   32   15   24   19   24   24    15
  29  |    7   15    8   13   52    5   19   13    9   35    5 |    17   24   19   18   46   18   27   17   30   26    19
  30  |    9   11    6    7   34    4   10   17    6   28    4 |    23   24   19   24   41   22   23   26   29   27    22
  31E |    9   14    8   10   27    6   23   12    9   19    5 |    28   35   35   29   38   29   36   28   32   36    31
  32  |   10   17   12    8   26    4   16    8    9   25    5 |    13   23   23   16   33   15   23   15   19   25    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   16    9   11   41    6   18   13   13   24      |T   15   26   20   19   35   18   26   20   25   23    18
 WRMS |    8   16    9   11   37    5   18   11    9   24      |NE  14   25   20   18   35   17   25   20   23   22    17
 MEDI |    8   16    9   10   33    5   19   12   10   21      |MD  13   26   19   18   35   17   26   17   23   23    17

Table 3.1531.5   GPS week: 1531   Day: 5   MJD: 54966.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   21  ---  ---  ---  ---   32  ---  142   36  ---   28 |    19  ---  ---  ---  ---   26  ---   72   26  ---    16
   2  |    8   21   13   10   27    5   23   14   14   21    6 |    14   26   17   13   35   14   22   18   22   22    14
   3  |    5   11   10   10   23    5   11    9    8   29    4 |    23   28   33   34   30   30   29   22   25   34    27
   4  |    9   15    7   10   31    4   13   14   11   25    5 |    12   22   14   19   31   15   17   20   21   26    13
  X5  |   18   28  ---  ---  ---   17  ---   26   24  ---   16 |    13   29  ---  ---  ---   25  ---   20   42  ---    22
   6  |    8   14    8   14   31    5   12    9    9   19    4 |    17   22   25   26   18   21   18   18   22   26    19
   7E |    7   19    9   10   33    5   24   18    9   17    5 |    20   25   21   19   39   19   27   22   24   21    19
   8E |   19   26   14   14   54    6   23   14   42   22    9 |    13   26   20   20   34   18   27   19   50   18    15
   9E |   16   17    9   11  109    6   17   19   12   26    6 |    53   50   49   52   60   47   49   54   56   51    49
  10  |    8   17    7    8   22    5   12   13   13   10    4 |    13   17   16   11   25   11   17   15   19   22    11
  11  |    8   21   11   10   65    4   15   12    7   18    5 |    11   26   18   18   56   15   23   14   21   19    14
  12  |   11   22    9    8   54    5   24   21   12   26    6 |    12   27   22   16   45   15   28   19   23   26    16
  13  |    8   21   14   10   53    4   23   14    9   21    5 |    15   29   22   19   42   17   27   17   15   16    15
  14  |    8   20    9   14   35    6   23   14   10   22    5 |    13   26   23   20   31   18   25   16   24   15    17
  15  |   10   19   11   10   41    3   23   13   12   18    5 |    12   26   22   16   42   14   23   18   20   22    14
  16  |    8   22   11   10   27    5   25   13   10   33    6 |    14   27   23   19   33   17   30   15   18   23    16
  17  |    9   12    9    9   23    6   20    9   10   40    6 |    18   20   17   21   22   18   23   20   28   37    17
  18  |    8   23    8   11   27    4   19    8    9   18    5 |    12   29   20   15   32   16   24   16   22   22    15
  19  |    6   17    7   10   22    5   15   11   10   29    5 |    15   27   26   28   32   23   28   21   27   29    23
  20  |    9   23   13   10   35    5   21   12    8   21    6 |    12   28   20   18   36   15   23   14   16   16    13
  21  |    7   20    8    7   25    4   16    8   11   23    5 |    11   23   14   12   33   12   20   16   19   23    11
  22  |    6   20    7   11   37    5   18   12   11   16    5 |    12   26   17   15   32   16   20   18   22   21    15
  23  |    7   19   13   12   40    4   23   11   11   25    6 |    14   27   21   19   38   16   27   15   15   17    14
  24  |    8   19    8   10   20    4   12   15   12   24    5 |    13   28   19   16   29   16   27   19   21   29    16
  25E |    9   20    9   10   48    5   18   15   10   21    5 |    13   29   18   18   36   18   30   21   19   21    15
  26  |    7   13    5    6   34    4   12   14   11   14    3 |     9   19   17   12   30   13   20   14   20   16    11
  27E |   11   17   10   10   58    4   18   15   26   19    6 |    29   22   22   21   27   21   21   21   32   26    27
  28  |    8   20   12   10   47    7   26    9   13   26    6 |    13   26   24   20   38   17   24   20   26   23    16
  29  |    7   15    8    8   44    4   16   12   13   35    5 |    16   22   15   17   36   16   23   17   23   18    15
  30  |    7   12    9    6   36    5   15   17   11   23    4 |    21   20   26   24   40   23   18   30   32   26    22
  31E |    7   21   11    8   41    6   25   11   11   20    5 |    34   39   35   34   36   33   39   31   35   35    33
  32  |    9   22   12    9   36    3   18   10   14   25    6 |    12   23   21   13   27   14   23   13   18   25    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19   10   10   43    5   19   13   14   24      |T   16   26   21   20   34   19   25   21   25   24    17
 WRMS |    8   19   10   10   37    5   18   12   10   22      |NE  14   24   20   18   33   17   23   19   22   23    16
 MEDI |    8   20    9   10   35    5   18   13   11   22      |MD  13   26   21   19   33   17   23   18   22   22    15

Table 3.1531.6   GPS week: 1531   Day: 6   MJD: 54967.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   16  ---  ---  ---  ---   23  ---  146   26  ---   20 |    20  ---  ---  ---  ---   23  ---  110   32  ---    23
   2  |    8   21   12    8   30    6   22   16   13   23    5 |    17   26   17   16   32   18   27   19   23   26    17
   3  |    7   11    8   11   18    6    7    8   10   29    4 |    25   31   29   30   37   28   30   25   29   36    27
   4  |    7   14   11   11   27    6   14   14   13   25    5 |    10   22   19   18   22   14   17   15   16   25    12
  X5  |   17   27  ---  ---  ---   18  ---   22   23  ---   15 |    19   30  ---  ---  ---   16  ---   22   25  ---    17
   6  |    9   13    6   15   22    5   10    8    8   21    4 |    19   26   20   26   27   21   20   20   24   25    19
   7E |    9   16   10   11   40    5   23   11    7   21    5 |    35   36   37   34   41   31   36   33   35   33    34
   8E |   19   25   12   19   47   10   24   12   39   20    9 |    13   27   16   19   32   19   26   12   52   14    15
   9E |   11   19   12   11  115    4   19   22   13   25    6 |    60   64   63   62   57   61   62   68   63   58    60
  10  |    8   17    9    7   19    4   13   15   14   19    4 |    15   24   21   17   23   18   19   17   17   14    15
  11  |    9   20   11   11   47    5   15   11    8   21    5 |    13   27   19   17   58   15   23   13   17   19    15
  12  |   10   22   11    9   44    5   21   16   14   28    6 |    17   31   27   21   48   21   31   19   26   34    22
  13  |    6   19   10   14   50    6   21   12    7   20    5 |    14   27   21   23   47   18   27   16   20   16    17
  14  |    7   29    9   17   30    8   19   11   11   21    6 |    18   30   24   30   34   23   25   20   23   16    20
  15  |    7   21   14   12   39    5   25   20   12   19    6 |    17   29   21   19   38   17   24   21   19   16    15
  16  |    8   21   10    9   33    7   24   13    9   37    6 |    16   28   23   19   35   18   30   16   20   24    17
  17  |    7   13    7   13   29    5   17    9   12   51    6 |    26   27   24   28   35   26   29   29   31   50    26
  18  |    8   22   12   14   32    5   21    8    8   20    5 |    14   30   24   18   36   18   28   19   22   24    17
  19  |    7   16    7   13   35    7   16   13    6   31    5 |    20   34   28   27   35   27   34   28   28   34    26
  20  |    7   20   14   13   37    6   17   19    9   18    5 |    15   24   22   18   40   14   19   19   19   18    15
  21  |    6   20    9    8   27    7   17    7   10   23    5 |    16   29   15   12   33   15   25   17   23   22    16
  22  |    7   27   10   13   32    5   18   13    9   18    5 |    14   34   19   20   37   16   22   18   21   19    16
  23  |    7   20   13   15   35    5   22   12    7   27    6 |    13   25   24   22   38   16   25   13   17   17    15
  24  |    7   16    9    8   26    5   12   10   10   25    4 |    16   26   21   18   31   17   27   19   17   32    17
  25E |    9   17   10   12   54    3   20   15   12   25    5 |    13   31   21   20   39   19   34   22   18   24    18
  26  |    5   10    8    8   33    4   12   10    8   14    3 |    13   20   16   15   33   13   19   12   21   13    14
  27E |   11   16   13   12   62    4   19   15   21   18    6 |    26   24   22   20   35   17   20   21   30   22    25
  28  |    7   22   10   13   40    6   19    8   10   34    6 |    18   30   24   26   34   21   26   23   24   29    20
  29  |    6   18   10   10   41    6   15    9   14   34    5 |    21   28   22   20   45   23   28   23   27   21    20
  30  |    9   15   10    7   36    4   12   15   12   21    4 |    28   27   30   31   51   30   24   34   33   27    28
  31E |   10   18    8   10   33    5   23   26   15   16    5 |    63   71   67   64   72   64   70   72   69   69    66
  32  |   10   21   13   11   32    7   13   12   12   25    5 |    12   23   22   15   33   17   21   13   24   24    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19   10   12   42    6   18   14   13   25      |T   20   30   25   24   38   22   28   25   27   26    21
 WRMS |    8   19   11   12   34    5   17   12    9   23      |NE  17   27   22   21   36   19   25   23   23   24    18
 MEDI |    8   19   10   11   33    5   18   12   11   21      |MD  17   28   22   20   35   18   26   19   23   24    17



Table 4: Precise Navigation Summary.

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

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

Table 4.1531   GPS week: 1531   MJD: 54961.0-54967.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3026 |U    8     8    24 |U    7     8    24 |U    7    10    18 |
emr | emr 2941 |     9    10    29 |     8    10    30 |    11    12    21 |
esa | esa 2921 |     9     7    25 |U    7     9    26 |     7     9    18 |
gfz | gfz 2843 |U    9     8    23 |U    8    10    29 |     7     7    19 |
grg | grg 2852 |    10    11    29 |U   12    15    39 |     9    13    24 |
igr | igr 2932 |     9     8    25 |     7     9    27 |    10     7    21 |
igs | igs 2907 |     9     8    24 |     7     9    27 |     7    10    20 |
jpl | jpl 2808 |     9     9    27 |U    8    10    32 |U    9    11    19 |
mit | mit 3044 |U    9     8    23 |U    7    10    29 |U   10    10    25 |



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 5.1531.0   GPS week: 1531   Day: 0   MJD: 54961.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3052 |     8     7    25 |     8     7    24 |     8    26    30 |
emr | emr 2956 |    10     9    32 |     7    15    25 |     9    28    25 |
esa | esa 2976 |     9     5    23 |     9     8    32 |     8    25    26 |
gfz | gfz 2853 |     9     6    18 |     9    12    29 |     9    10    28 |
grg | grg 2880 |     8     8    28 |     8     8    28 |    10    26    27 |
igr | igr 3010 |     8     6    27 |     8    10    22 |    30     9    45 |
igs | igs 2957 |     8     7    23 |     7    12    23 |     7    29    28 |
jpl | jpl 2771 |     8     9    27 |     8    11    30 |     9    27    25 |
mit | mit 3072 |     9     7    24 |     8     9    30 |    15    21    34 |

Table 5.1531.1   GPS week: 1531   Day: 1   MJD: 54962.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3047 |     9     8    40 |     8    11    31 |     7     7    16 |
emr | emr 2953 |    11     7    29 |    11    12    31 |    11     9    22 |
esa | esa 2976 |     9     7    43 |    11    16    49 |     7     6    19 |
gfz | gfz 2856 |     8     7    37 |    11    12    33 |     7     5    20 |
grg | grg 2784 |     9    10    36 |    10    15    43 |     8     7    23 |
igr | igr 2960 |     8     7    39 |     9    13    28 |     7     6    19 |
igs | igs 2960 |     8     7    37 |    10    11    31 |     7     6    16 |
jpl | jpl 2770 |     9     8    37 |     9    13    34 |     9     7    21 |
mit | mit 3072 |     9     6    36 |     8    12    35 |    12     9    36 |

Table 5.1531.2   GPS week: 1531   Day: 2   MJD: 54963.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2947 |    13     9    22 |     5     7    23 |     7     6    18 |
emr | emr 2864 |    11    10    31 |     8    12    30 |    12    10    19 |
esa | esa 2880 |    13     6    21 |     5     6    23 |     8     7    21 |
gfz | gfz 2765 |    12     6    21 |     6     8    25 |     8     8    21 |
grg | grg 2784 |    15     8    24 |    16    19    58 |    12    15    25 |
igr | igr 2887 |    13     7    22 |     5     9    26 |     8     6    19 |
igs | igs 2870 |    12     7    21 |     6    10    24 |     8     7    19 |
jpl | jpl 2771 |    13     9    26 |     6    10    30 |    10     9    19 |
mit | mit 2880 |    13     7    20 |     9    14    31 |     8     7    22 |

Table 5.1531.3   GPS week: 1531   Day: 3   MJD: 54964.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3041 |     8     7    12 |     6     8    27 |     8     9    15 |
emr | emr 2955 |    10     8    25 |     9     7    32 |    12    12    21 |
esa | esa 2880 |     8     7    16 |     6     7    23 |     7     8    12 |
gfz | gfz 2856 |     9     7    16 |     8     9    29 |     7     7    14 |
grg | grg 2880 |     9    10    24 |     9     6    22 |     9    13    22 |
igr | igr 2954 |     8     7    17 |     8     7    34 |     8     8    13 |
igs | igs 2861 |    10     6    16 |     7     9    43 |     8     9    15 |
jpl | jpl 2769 |     9     8    21 |     8     8    42 |    10    11    18 |
mit | mit 3072 |     8     7    14 |     6     8    28 |     8     8    15 |

Table 5.1531.4   GPS week: 1531   Day: 4   MJD: 54965.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3037 |     6    12    22 |     6    10    24 |     7     5    18 |
emr | emr 2955 |    10    12    30 |     7    10    35 |    12    11    24 |
esa | esa 2976 |     7    13    25 |     6     8    21 |     7     6    14 |
gfz | gfz 2856 |     7    13    27 |     6    10    38 |     7     4    17 |
grg | grg 2880 |     9    15    28 |    11    17    38 |     7     7    20 |
igr | igr 2957 |     7    12    24 |     6    11    33 |     7     5    15 |
igs | igs 2943 |     7    12    24 |     6    10    26 |     6     5    17 |
jpl | jpl 2857 |     8    13    25 |     7    11    34 |     8     6    16 |
mit | mit 3072 |     7    13    23 |     7    10    31 |     8     6    19 |

Table 5.1531.5   GPS week: 1531   Day: 5   MJD: 54966.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3036 |     8     7    24 |     9     7    22 |     7    10    21 |
emr | emr 2954 |     9    11    26 |    10     9    30 |    10    10    20 |
esa | esa 2880 |     8     7    23 |     8    10    16 |     7     9    17 |
gfz | gfz 2858 |     8     8    24 |     9    10    31 |     7     8    18 |
grg | grg 2880 |    16    18    38 |    24    32    50 |    11    16    28 |
igr | igr 2863 |     8     7    23 |     8     9    25 |     7     8    18 |
igs | igs 2856 |     9     9    26 |     9     8    26 |     7    10    28 |
jpl | jpl 2856 |     8     8    26 |     9    10    33 |     9    10    20 |
mit | mit 3072 |     8     7    24 |     8     7    30 |     7     8    19 |

Table 5.1531.6   GPS week: 1531   Day: 6   MJD: 54967.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3027 |     6     8    22 |     6     6    19 |     7     5    12 |
emr | emr 2952 |     6    12    28 |     7     9    23 |     9     7    18 |
esa | esa 2880 |     7     7    23 |     5     6    16 |     7     4    15 |
gfz | gfz 2858 |     6     8    22 |     7     7    19 |     7     5    15 |
grg | grg 2880 |     7    11    24 |    11    11    37 |     8     7    24 |
igr | igr 2894 |     7     8    23 |     5     6    19 |     7     5    16 |
igs | igs 2906 |     6     8    23 |     6     5    18 |     6     4    15 |
jpl | jpl 2863 |     7     9    25 |     6     7    19 |     8     4    17 |
mit | mit 3072 |     7     8    23 |     6     6    18 |    14    11    27 |


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 6.1531   GPS week: 1531   MJD: 54961.500-54967.500

                                                         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 |      -8      -1     118     -29     -7 |       6     16
            |      28      21      94      98     10 |       2
emr   uuuuu |      47      58    -155     250     -5 |      48     51
            |      33      25     106     137      5 |       2
esa   uuuuu |     -25     -49      20    -109      0 |       4     20
            |      38      25      88      87      9 |       3
gfz   uuuuu |      -2     -13     111     -42     -3 |      28     31
            |      10      18      80      71      6 |       3
grg   xxxxx |     -51     -74     183     -38     -6 |      -1     19
            |      40      42     109     105     33 |       4
igr   xxxxx |      -4     -17      -7     -15     13 |      -8     22
            |      30      26      85      72      5 |       4
irf   xxxxx |      -2       2       1     -26      0 |      -5     16
            |      10      12      89      21      4 |       4
jpl   uuuuu |      -9      15      59     -95      8 |       3     17
            |       8      12     108      75     10 |       5
mit   xxxxx |     597     491     -38     -37      4 |      11     19
            |      17      16     166      49      5 |       4
ngs   uuuuu |     -23      30     -72      28     -9 |       7     16
            |      47      47      49      75     10 |       2
sio   uuxuu |     100      -3    -458     179     -9 |      75     76
            |      22      33      89      75      5 |       5


Table 7.1531.0   GPS week: 1531   Day: 0   MJD: 54961.500

                                                         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 |     -11      28     122     174     -8 |       5     19
emr   uuuuu |      60      80      -3     418     -4 |      47     50
esa   uuuuu |     -60     -90     -85    -232     14 |      -1     18
gfz   uuuuu |     -16     -40     141      75      1 |      23     27
grg   xxxxx |     -76     -83     364     110    -18 |       4     24
igr   xxxxx |     -40     -43      93    -143      4 |     -13     21
irf   xxxxx |     -15      -7     149     -10      3 |     -11     18
jpl   uuuuu |     -15       4     174    -172      0 |      -2     14
mit   xxxxx |     575     484     246     -17      1 |       6     16
ngs   uuuuu |      37     112    -144      24    -16 |       6     19
sio   uuxuu |      76     -22    -272     136     -8 |      67     70

Table 7.1531.1   GPS week: 1531   Day: 1   MJD: 54962.500

                                                         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     -13     218    -101    -16 |       5     19
emr   uuuuu |      95      83     -79     343     -5 |      46     50
esa   uuuuu |     -91     -13     -91     -74     -6 |       2     21
gfz   uuuuu |       0      -7     161     -16     -7 |      25     29
grg   xxxxx |      13    -130     179       2    -54 |       5     25
igr   xxxxx |     -11     -27     -78      79     18 |     -13     22
irf   xxxxx |      -9      11      69     -55     -3 |      -9     18
jpl   uuuuu |     -11      16      33    -119     10 |      -3     13
mit   xxxxx |     582     505      88    -117     -3 |       6     17
ngs   uuuuu |      43     -38       3     -88    -11 |       5     17
sio   uuxuu |     102      17    -477     242     -8 |      69     72

Table 7.1531.2   GPS week: 1531   Day: 2   MJD: 54963.500

                                                         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 |     -28      20     248     -31    -13 |       8     19
emr   uuuuu |      74      79    -269     374      2 |      49     52
esa   uuuuu |     -21     -39       6     -96      5 |       5     21
gfz   uuuuu |      -6     -28     243    -143      4 |      28     32
grg   xxxxx |     -93     -70     168     -47    -18 |       3     26
igr   xxxxx |     -31     -34      65     -40      9 |      -8     22
irf   xxxxx |       6      12      46     -36      7 |      -6     16
jpl   uuuuu |     -17      -4      60      -8     -2 |       1     15
mit   xxxxx |     597     509      33     -69      9 |       9     18
ngs   uuuuu |     -34      36     -99     -17     -2 |       8     17
sio   uuxuu |     130       9    -511     222      0 |      75     76

Table 7.1531.3   GPS week: 1531   Day: 3   MJD: 54964.500

                                                         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 |      30      -9      14    -121     -4 |       6     17
emr   uuuuu |      31      30    -113      79      1 |      49     52
esa   uuuuu |     -15     -67       3      -8      0 |       5     21
gfz   uuuuu |       6     -15      15     -86      0 |      29     33
grg   xxxxx |      -8     -59     156      19     -7 |      -4     16
igr   xxxxx |       8     -24     -16      26     17 |      -8     22
irf   xxxxx |      -8       9     -46     -38      3 |      -4     17
jpl   uuuuu |       4      31     117     -61     21 |       1     16
mit   xxxxx |     590     497    -105     -56     12 |      10     19
ngs   uuuuu |     -39      43     -26      35    -26 |       9     18
sio   uuxuu |      89      40    -422     135     -7 |      78     79

Table 7.1531.4   GPS week: 1531   Day: 4   MJD: 54965.500

                                                         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 |     -11      -6     127      -6    -17 |       9     17
emr   uuuuu |      34      20    -108      80    -11 |      51     54
esa   uuuuu |      -7     -34      73    -225    -12 |       7     21
gfz   uuuuu |      -6       6     113       2    -13 |      31     35
grg   xxxxx |     -58     -23      69     -42     -5 |      -2     14
igr   xxxxx |      -2      35    -102      14     17 |      -5     22
irf   xxxxx |       2      11     -99       5     -6 |      -1     15
jpl   uuuuu |      -6      20     -64       6     22 |       5     18
mit   xxxxx |     610     498    -214      11      2 |      15     22
ngs   uuuuu |     -38       1     -92     111     -7 |       9     18
sio   uuxuu |      95      17    -513     293    -13 |      80     81

Table 7.1531.5   GPS week: 1531   Day: 5   MJD: 54966.500

                                                         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 |       1       9     103     -71     -5 |       4     11
emr   uuuuu |      -5      61    -223     202    -11 |      48     50
esa   uuuuu |      15     -49     139     -89     -7 |       4     18
gfz   uuuuu |      16       9      78     -82     -5 |      29     32
grg   xxxxx |     -84     -30      60     -69      5 |      -4     13
igr   xxxxx |      -1     -17     -88     -57     11 |      -4     23
irf   xxxxx |      14      -5     -50     -35     -4 |      -3     13
jpl   uuuuu |      -3      17     -90    -128      6 |       7     20
mit   xxxxx |     624     483    -160     -35      3 |      13     20
ngs   uuuuu |     -87       9     -64     130      3 |       5     12
sio   uuxuu |     131     -26    -495      78    -16 |      77     78

Table 7.1531.6   GPS week: 1531   Day: 6   MJD: 54967.500

                                                         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 |     -54     -33      -5     -49     13 |       3     10
emr   uuuuu |      38      54    -288     253     -8 |      46     48
esa   uuuuu |       6     -48      95     -39      7 |       4     18
gfz   uuuuu |      -7     -16      26     -43     -4 |      29     32
grg   xxxxx |     -51    -124     281    -236     56 |      -5     13
igr   xxxxx |      51     -10      78      16     14 |      -2     22
irf   xxxxx |      -3     -18     -63     -15     -1 |      -3     13
jpl   uuuuu |     -16      21     183    -181     -2 |      10     20
mit   xxxxx |     605     464    -152      27      4 |      15     21
ngs   uuuuu |     -40      48     -86       0     -1 |       5     13
sio   uuxuu |      81     -56    -520     147     -8 |      76     76



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