[IGSREPORT-19700] Wk 1631 IGS Final Orbits

Jim Ray igs.acc at noaa.gov
Thu Apr 28 05:47:19 PDT 2011


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1631   (Apr 10, 2011 - Apr 16, 2011)

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 (as part of the separate SINEX combination since GPS
week 1051; weighted according to the orbit combination before that time). 

  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:

igs1631[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1631[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1631[0-6].cls  IGS GPS clock combination summary report.
igs16317.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16317.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 1582, a new solution from CNES/GRGS (GRG) is included with
    weight except for the clock and LOD combinations.

 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  |  EMR   | 4 9 4 9 HARB WTZR HARB WTZR
                0  |  ESA   | MATE
                0  |  GFZ   | 7 9 27 31 CAS1 IISC WTZR
                0  |  GRG   | ADIS
                0  |  JPL   | 4 9 25 27 ADIS URUM
                0  |  MIT   | 8 9 24 27 8 9 24 27 CAS1
                1  |  EMR   | 4 9 24 4 9 24 WTZR WTZR
                1  |  ESA   | MCM4
                1  |  GFZ   | 7 9 27 31 BRUS MDVJ OHI2 RECF WAB2 WSRT ZIMM
                1  |  GRG   | WTZR
                1  |  JPL   | 4 9 25 27
                1  |  MIT   | 8 9 22 24 27 8 9 22 24 27 DAV1
                2  |  COD   | CHUR
                2  |  EMR   | 9 9 24 WTZR WTZR
                2  |  ESA   | MCM4 TIXI UNSA
                2  |  GFZ   | 7 9 27 31 CHUR KIT3 MATE MDVJ WAB2 WSRT
                2  |  GRG   | NOVM NRC1
                2  |  JPL   | 9 25 27 SFER
                2  |  MIT   | 8 9 12 24 8 9 12 24 MAW1 FAIR HARB MAW1 TIXI
                3  |  EMR   | 9 8 9 24 WTZR WTZR
                3  |  ESA   | IRKJ UNSA
                3  |  GFZ   | 7 9 27 31 AREQ KERG MDVJ
                3  |  GRG   | AMC2 IRKJ
                3  |  JPL   | 8 9 24 25 27
                3  |  MIT   | 8 9 27 8 9 27 CAS1 MAW1 FAIR KELY MAW1
                4  |  ALL   | 1 1
                4  |  COD   | 24 24 WTZR
                4  |  EMR   | 8 8 WTZR WTZR
                4  |  ESA   | UNSA
                4  |  GFZ   | 7 8 9 27 31
                4  |  GRG   | AMC2 FAA1
                4  |  JPL   | 8 24 25 PIMO
                4  |  MIT   | 8 9 22 24 27 8 9 22 24 27 CAS1 MAW1 CAS1
                5  |  COD   | RAMO
                5  |  EMR   | 8 8 WILL
                5  |  ESA   | UNSA
                5  |  GFZ   | 7 8 9 31 MDVJ
                5  |  GRG   | NOVM
                5  |  JPL   | 8 25 YAKT
                5  |  MIT   | 8 9 27 8 9 27 DAV1 DAV1
                6  |  EMR   | 8 8
                6  |  ESA   | IISC UNSA
                6  |  GFZ   | 7 8 9 27 NYAL WAB2 ZIMM
                6  |  GRG   | LPGS
                6  |  JPL   | 8 25
                6  |  MIT   | 8 9 22 27 8 9 22 27 HRAO CAS1 HRAO

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets.  Note that only the largest clock offset and drift are output
    to the summary file.  However, the clock combination and the listed RMS
    include all the clock segments.  In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                1  |  MIT   | ~00:00 | ~ 0.38 ns

 6. 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
               ----+--------+---------------
                1  |  GRG   |   6

 7. 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 G24 |  4 |    |    |    |    |    |  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 all the AC orbit and ERP values in order
    to align them to the IGS05 frame. These rotations were estimated in the IGS
    SINEX combination process, performed by the IGS Reference Frame Coordinator
    at the Institut Geographique National (IGN), and are based on the common
    stations between the individual AC SINEX solutions and the IGS05.snx SINEX
    frame. 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  |   -1.1     .6    1.4     -20     11    -27     .23
       EMR  |   -2.7   -1.3   -7.2      35     -8     -5     .40
       ESA  |    1.0   -3.0    -.6      60     -5    114     .10
       GFZ  |   -1.2    1.2    -.7      28      7    -23     .73
       GRG  |    -.3    3.9    8.5      15     19    -69     .55
       JPL  |     .5   -1.6     .3      35    -13    -16     .24
       MIT  |    6.1   -4.0   -3.4      -9    -13    -64     .35
       NGS  |    3.3   -8.1    2.6    -113    -45     51     .25
       SIO  |    2.7     .2  -15.4      29   -157     27     .65


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 IGN. 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 5-Nov-2006 (GPS Week 1400, day 0; MJD 54044) the absolute antenna
    model is introduced (IGSMAIL #5438). 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 1.1631.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1631.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 2.1631.[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 3.1631.[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 5.1631.0-6).

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 1631 summary.                       (Apr 10, 2011 - Apr 16, 2011)

Table 1.1631.a   GPS week: 1631   MJD: 55661.000-55667.000

         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  246|    0     0     0    33   -54   -17  -.22   10    8 |    -290    -536     19     71
        |    0     0     1    14    12    18   .02           |     401     826
emr  104|   -1     0    -1   -64    45     0   .46   22   22 |   -1319    -222     17    103
        |    1     1     1    31    38    20   .03           |     850     886
esa  139|    1     1     0  -155   -85    67   .25   10   10 |    -706    -227     15    111
        |    1     1     1     7    26    20   .02           |     745    1230
gfz  194|    0     0     1   -54   -59   -22  -.17   12   11 |     233      75     22    100
        |    0     0     2    29    58     8   .03           |     284     930
grg  135|    1     0     2   -32   -63   -37   .66   17   15 |      40      -6     53    211
        |    1     0     1    26    11    14   .02           |     284     532
igr  n/a|    0     0    -1    17     7    -7   .00    6    6 |   -4414    -167     19     67
        |    0     0     0    25    27    11   .03           |     911     821
jpl  126|    1     1    -1   -70    10   -33   .45   24   23 |     659    -264     21     93
        |    2     1     1     9    13    37   .02           |     757     753
mit  261|    0     0    -3    61    32    -9  -.38   17   11 |     -67    -133     19    153
        |    1     0     1    28    24    14   .01           |     472     410
ngs  212|    0     0    -1   241    99   -19  -.24   13    9 | -142932  325540   2200   3824
        |    1     0     0    30    46    30   .02           |  377930  863574
sio  258|    0     2     8   -19   269    29  -.31   21   20 |     ---     ---    ---    ---
        |    1     0     1    18    18    22   .04           |     ---     ---


Table 1.1631.b   GPS week : 1631   MJD: 55661.000-55667.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1631.0   GPS week: 1631   Day: 0   MJD: 55661.000                            

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  246|    0     0     1    51   -35   -24  -.21   11    8 |    -104   -1182     21     85
        |                     98    28                       |
emr  104|   -2     0     0   -26    60   -35   .46   21   21 |     109   -1784     21    111
        |                    -37   -32                       |
esa  139|    0     0    -2  -167   -42    65   .26    9    9 |   -1273    1144     16    113
        |                    123   106                       |
gfz  194|    0     0     3  -110   -91    -9  -.20   10    9 |     360    -293     26    100
        |                    -25    63                       |
grg  135|    4     0     3   -58   -77   -25   .65   20   18 |     296    -536     60    198
        |                    116    33                       |
igr  n/a|    0     0    -2    62    56   -21   .03    6    6 |   -3503   -1719     21     77
        |                    -24    49                       |
jpl  126|    2     2    -4   -65    36   -52   .48   24   23 |    1846   -1784     20     98
        |                     14    13                       |
mit  261|    0     0    -3   101   -17    -3  -.38   17   10 |     -14    -217     20    145
        |                    -16     0                       |
ngs  212|    0     0    -3   297   142   -24  -.23   14    9 |     102   -1427   2043   3365
        |                     15   -54                       |
sio  258|   -3     1     9     8   240    37  -.30   23   23 |     ---     ---    ---    ---
        |                    -67   -71                       |

Table 2.1631.1   GPS week: 1631   Day: 1   MJD: 55662.000                            

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  246|    0     0     0    15   -75   -28  -.20   10    8 |    -652     741     17     73
        |                     84    59                       |
emr  104|    0    -1    -2  -104    26   -20   .52   22   22 |   -2394     789     16    104
        |                      5   -15                       |
esa  139|    1     2     0  -152   -57    83   .28   11   11 |   -1999     832     14    133
        |                    136   104                       |
gfz  194|    0     0     2   -28   -11   -22  -.17   10    9 |    -171     481     21    135
        |                    -15    82                       |
grg  135|    0    -1     2   -27   -58   -29   .65   18   16 |    -154     941     54    213
        |                     73   -14                       |
igr  n/a|    0     0    -2   -10   -19   -13   .04    6    5 |   -5785     741     18     59
        |                     14    75                       |
jpl  126|    2     3    -3   -87    -5     2   .43   24   24 |    -375     533     22    101
        |                     66   102                       |
mit  261|    0     0    -4    75    29   -18  -.37   18   11 |    -128     -35     18    162
        |                    -16    -6                       |
ngs  212|   -1     0    -2   213    44    17  -.24   13    9 |    -670     720   2189   3387
        |                    -36    50                       |
sio  258|   -1     2     8   -23   284    12  -.35   23   23 |     ---     ---    ---    ---
        |                    -55   -87                       |

Table 2.1631.2   GPS week: 1631   Day: 2   MJD: 55663.000                            

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  246|    0     0     2    26   -55    -5  -.23   12   10 |    -891     325     22     73
        |                     83    15                       |
emr  104|   -2     0     0   -96    -9     9   .46   21   21 |   -1914     151     22    106
        |                     14    30                       |
esa  139|    3     0    -2  -152   -84    23   .24   11   11 |     164   -2113     15    109
        |                    106   100                       |
gfz  194|    0     0     0   -36   -18   -26  -.21   12   12 |       0    1999     22     96
        |                     34    75                       |
grg  135|    0     0     0   -31   -63   -41   .65   17   16 |    -309     467     70    246
        |                     88    -6                       |
igr  n/a|    0    -1    -2   -11   -20   -13  -.04    6    6 |   -5260     278     28     70
        |                     11    60                       |
jpl  126|    1     2     0   -57    10   -71   .45   24   24 |      82      78     23     97
        |                    -47    97                       |
mit  261|    1    -1    -3    83    39    -9  -.40   19   10 |    -922     633     18    133
        |                    -16    -4                       |
ngs  212|   -1    -1    -1   237    68    19  -.25   14    9 | -999999 2283943   2125   3838
        |                    -41   -20                       |
sio  258|   -1     3    11     0   260    55  -.37   21   21 |     ---     ---    ---    ---
        |                    -64   -90                       |

Table 2.1631.3   GPS week: 1631   Day: 3   MJD: 55664.000                            

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  246|    0     0     0    31   -57   -38  -.20   10    8 |    -171   -1153     17     66
        |                     63    24                       |
emr  104|    0     1    -2   -71     7    -1   .45   22   22 |   -1444    -513     13     89
        |                     -8    27                       |
esa  139|    1     0     1  -151  -103    87   .24    9    9 |    -513      21     12    102
        |                     38   101                       |
gfz  194|   -1    -2     4   -52    15   -10  -.14   12   12 |     356     -99     23     96
        |                    -10    63                       |
grg  135|    1     0     2   -23   -53   -47   .63   16   14 |     213     -92     50    204
        |                     41    18                       |
igr  n/a|    0     0    -2    28     7    -2   .02    6    6 |   -4530    -412     18     75
        |                    -69    61                       |
jpl  126|   -3     2    -2   -67     6   -17   .48   23   22 |     506    -331     20     97
        |                     32   -80                       |
mit  261|    2     0    -4    37    34    16  -.37   17   12 |     543    -763     19    166
        |                     -4     0                       |
ngs  212|   -1    -1    -2   222    69   -52  -.27   10    6 |    -219   -1104   2045   3859
        |                    -10   -36                       |
sio  258|    0     3     7   -34   266    31  -.26   19   20 |     ---     ---    ---    ---
        |                    -56   -79                       |

Table 2.1631.4   GPS week: 1631   Day: 4   MJD: 55665.000                            

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  246|    0     0    -1    19   -60    12  -.21   10    8 |    -116    -847     23     71
        |                     97    69                       |
emr  104|   -3    -1     0   -79    58     6   .44   23   22 |   -1888     102     17    105
        |                    -27   -32                       |
esa  139|    0     0    -1  -163  -116    67   .24   10   10 |    -715   -1036     19    108
        |                     23   117                       |
gfz  194|    0     0     0   -23   -51   -24  -.12   12    9 |     390    -539     20     89
        |                     -3   147                       |
grg  135|    0    -1     3   -50   -75   -25   .69   16   15 |     133    -491     44    210
        |                     57     9                       |
igr  n/a|    0     0     0    22    -4    -5   .00    6    5 |   -4705     180     19     66
        |                     -5    43                       |
jpl  126|    1     0    -1   -70     1    13   .44   24   23 |     287     -44     24     86
        |                     48    75                       |
mit  261|    0     0    -1    63    64   -26  -.37   16   10 |     -16    -227     19    169
        |                     -7   -15                       |
ngs  212|    0    -1    -1   223    66   -56  -.25   12    9 |      16   -1083   2172   3959
        |                     42    -8                       |
sio  258|    0     2     8   -12   299    -6  -.28   20   19 |     ---     ---    ---    ---
        |                    -63   -77                       |

Table 2.1631.5   GPS week: 1631   Day: 5   MJD: 55666.000                            

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  246|    1     0    -1    48   -54   -35  -.24    9    7 |     325   -1397     22     68
        |                     37    40                       |
emr  104|   -2    -2     0   -33    96    18   .49   22   22 |    -933     528     16    107
        |                    -41   -58                       |
esa  139|    0     1     0  -146   -88    66   .24    8    8 |    -636     731     16    113
        |                     35   110                       |
gfz  194|    0     0     0   -55  -143   -32  -.16   15   14 |     652    -730     20     88
        |                    -11   115                       |
grg  135|    1    -2     3   -53   -69   -65   .66   15   15 |     384    -223     42    200
        |                     21   -15                       |
igr  n/a|    0     0     0     5    29    15  -.02    6    6 |   -3590     343     16     61
        |                    -28    42                       |
jpl  126|    1     1     0   -71     6   -24   .42   23   22 |    1208     216     19     87
        |                    -13    90                       |
mit  261|    0     0    -4    46    41    -2  -.39   15   11 |     355    -130     21    142
        |                      6    -3                       |
ngs  212|   -1     0     0   269   150    -9  -.24   14   11 |     595   -1855   2349   4136
        |                     -1   -62                       |
sio  258|    0     1     7   -42   274    55  -.35   19   18 |     ---     ---    ---    ---
        |                    -71   -81                       |

Table 2.1631.6   GPS week: 1631   Day: 6   MJD: 55667.000                            

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  246|    0    -1     0    43   -45    -4  -.25    8    7 |    -426    -239     17     63
        |                     60    43                       |
emr  104|   -1     2    -4   -39    81    21   .43   22   22 |    -773    -827     17     99
        |                    -59   -52                       |
esa  139|    0     2     0  -152  -107    74   .27    9    9 |      29   -1169     18    101
        |                     41    82                       |
gfz  194|   -2    -1     0   -71  -114   -29  -.17   12   11 |      46    -290     22     99
        |                    -55    86                       |
grg  135|    0     0     4    18   -46   -29   .68   15   13 |    -280    -110     55    210
        |                    -32   -47                       |
igr  n/a|    0     0    -1    23     2   -13  -.03    5    6 |   -3530    -586     19     66
        |                    -50    41                       |
jpl  126|    2     0    -1   -72    14   -86   .44   22   22 |    1065    -518     21     90
        |                    -11    -8                       |
mit  261|    0     0    -2    20    33   -19  -.37   15   12 |    -287    -196     22    156
        |                     17    -2                       |
ngs  212|    1     0    -1   224   152   -34  -.22   12    9 |    -355    -414   2478   4226
        |                     28   -30                       |
sio  258|    1     2     8   -27   259    21  -.29   19   17 |     ---     ---    ---    ---
        |                    -94   -62                       |

       
       
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 3.1631.0   GPS week: 1631   Day: 0   MJD: 55661.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   26  ---  ---  ---  ---   45  ---   42   29  ---   22 |    63  ---  ---  ---  ---   78  ---    9   34  ---    56
   2E |   10   23   10    8   22    4   24    9    8   20    4 |    21   26   17   19   31   18   25   22   25   22    19
   3  |    5   14    9   11   15    8   12    7   11   16    3 |    15   18   14   21   24   19   18   14   22   15    13
   4E |   13   22    8    7   27    4   20   22   17   31    6 |   111  111  112  109  114  109  113  110  113  116   111
   5  |    6   21    8    9   17    5   22   12    8   21    4 |    21   30   18   24   28   19   26   22   24   18    19
   6  |    5   16    6   10   14    7   14    8    9   15    3 |    19   20   18   22   39   23   19   20   22   18    18
   7E |    8   17    7    6   16    5   27   14    8   16    4 |    23   32   27   21   31   22   33   23   26   22    21
   8E |   21   28   12   13   28    6   22   54   31   23    9 |    34   36   34   27   41   31   39   58   47   24    29
   9E |   16   22    8   12   19    5   21   18   11   25    5 |    51   52   57   63   50   54   52   57   55   55    56
  10  |    5   13    5    7   16    3   15    7   10   18    3 |    25   27   28   28   30   25   26   28   28   23    25
  11  |    8   16   12    8   22    4   15    7   11   20    4 |    29   26   33   21   35   25   30   24   28   21    23
  12  |    8   25    7   10   18    6   29   14   10   29    5 |    22   32   31   32   31   26   28   28   25   25    25
  13  |    7   20    6    7   22    7   24   15    9   25    4 |    23   37   26   26   40   25   36   26   28   20    24
  14  |   10   26    7   16   18    6   31    9   10   20    5 |    27   34   31   37   40   29   32   27   29   28    28
  15  |    7   24    8   10   18    6   30   13   10   20    5 |    22   30   26   28   33   25   33   23   27   27    21
  16  |    7   26    8   10   18    7   27   10   11   23    5 |    25   32   25   26   28   28   31   23   31   23    22
  17  |    8   20   10   12   16    6   28   13   10   28    5 |    20   29   19   22   21   20   35   22   21   21    17
  18  |    9   25   12   14   20    6   31   10    7   18    5 |    12   29   24   24   30   18   29   19   18   19    17
  19  |   10   23   12    9   12    7   23    9   10   25    4 |    27   33   25   22   22   27   35   28   29   25    23
  20  |   12   25   11    9   19    6   26   18    9   24    5 |    17   25   27   21   26   20   27   24   22   18    17
  21E |    6   20    6    8   21    4   22   12    8   16    4 |    25   31   31   18   36   26   35   25   28   20    23
  22  |    8   23   11    9   20    6   30   14   10   18    5 |    19   28   26   26   33   20   27   26   20   23    21
  23  |    8   23    6   10   19    5   29    9    9   25    4 |    22   35   24   27   34   23   34   24   23   21    22
  24E |   27   23   12   14   28   11   19   17   41   23    8 |    96  100   93   94   99   95  102   97   98  103    96
 X25  |    6   15    8   10   19    5   25   19    9  ---    5 |    36   38   44   41   48   37   46   34   35  ---    38
 X26  |    7  ---  ---   11   11   10  ---   10   20   25    6 |    57  ---  ---   56   56  131  ---   62   53   51    52
  27E |   15   17   12   13   23   10   21   40   20   31    7 |    29   38   35   31   40   33   40   52   37   46    31
  28  |   10   25    9    9   19    6   29   12   11   28    5 |    25   39   34   34   40   31   35   31   30   31    28
  29  |    7   20    5   11   15    4   25   10    8   31    4 |    17   31   19   16   22   18   37   19   19   21    17
  30  |    7   13    6    6   16    5   16   11   11   23    4 |    28   27   26   25   32   27   26   27   30   28    24
  31E |   11   20    8    8   23    5   30   14   11   28    5 |    25   32   27   22   34   26   32   25   29   32    23
  32  |   11   18    8    9   18    4   19    7   11   22    4 |    16   18   22   24   23   19   20   23   23   17    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   21    9   10   20    6   24   17   14   23      |T   31   35   32   32   38   35   36   32   33   31    30
 WRMS |    8   21    9    9   18    6   23   10    9   23      |NE  25   29   25   27   32   31   30   25   27   23    24
 MEDI |    8   21    8   10   19    6   24   12   10   23      |MD  25   31   26   26   33   25   32   25   28   23    23

Table 3.1631.1   GPS week: 1631   Day: 1   MJD: 55662.000                            

        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  |    5  ---  ---  ---  ---   21  ---  ---  ---  ---    0 |    45  ---  ---  ---  ---   41  ---  ---  ---  ---    45
   2E |    8   25   14   10   14    8   25   12   10   20    5 |    21   31   22   24   31   22   28   25   26   26    23
   3  |    7   13    8    8   13    6   15    6    8   14    3 |    12   16   19   17   20   10   12   13   10   14    12
   4E |   15   20   11    8   19    5   18   22   18   33    6 |   103  106   99  101  104  101  105  104  105  108   102
   5  |    7   26   14   11   16    5   26   15   10   24    5 |    23   37   24   26   32   25   29   25   28   29    24
  X6  |    7   13    8    7  111    5  ---    7    8   14    3 |    17   19   22   21   99   16  ---   20   15   18    18
   7E |    7   15   13    5   14    7   24   17    8   18    4 |    17   25   22   12   24   16   25   18   15   16    15
   8E |   22   25   19   13   22   10   27   62   27   21   10 |    39   40   40   32   41   33   43   69   46   29    35
   9E |   15   18   10   14   22    4   19   23   12   23    6 |    55   56   56   53   52   53   56   66   58   49    54
  10  |    5   13   10    7   17    4   14    7    8   18    3 |    24   25   27   22   25   23   26   25   23   25    23
  11  |    7   15    9   12   22    5   16    8   10   17    4 |    15   23   19   19   26   16   21   16   17   21    15
  12  |    8   27   11    9   14    5   27   13    8   29    5 |    14   30   22   19   27   17   24   20   14   18    17
  13  |    6   19   10    8   20    7   25   12   10   22    4 |    18   35   26   20   39   21   33   22   21   19    21
  14  |   10   24    9   12   12    5   28   12   15   18    5 |    20   34   26   25   32   23   30   22   22   24    23
  15  |    7   26    8    8   16    5   27   10    8   17    4 |    18   30   23   17   28   19   28   21   21   24    19
  16  |    8   28    7    9   18    4   27   13    9   22    5 |    18   31   20   23   28   18   28   21   21   22    20
  17  |    6   20   13   10   15    3   24   13   11   26    5 |    19   28   22   20   23   19   27   22   17   25    18
  18  |    9   24    9   11   15    6   29    9    8   16    4 |    14   32   24   21   30   20   29   21   20   21    19
  19  |    8   22   12   11   12    6   25   11   11   24    5 |    19   26   18   21   15   16   29   22   17   20    17
  20  |   10   25   14   12   17    5   27   15    7   23    5 |    15   30   23   20   23   16   24   19   13   20    17
  21E |    9   24   10   10   24    5   22   14    9   17    5 |    20   31   26   20   32   19   33   23   17   22    21
  22  |    9   21   10    9   19    5   28   11   12   17    5 |    21   33   28   24   34   24   29   28   26   27    24
  23  |    7   21    9   13   17    6   26    7    6   25    4 |    20   34   23   23   31   21   29   22   19   23    21
  24E |   18   25   15   14   22    9   20   17   32   19    7 |   131  132  137  124  138  127  137  129  134  129   130
 X25  |    7   19    8    8   15    5   26   16   11  ---    4 |    22   30   32   26   37   26   41   22   23  ---    25
  27E |   15   18   12   12   29    6   21   32   19   30    7 |    25   36   28   26   48   26   40   36   32   43    28
  28  |    7   26   10   10   14    6   27   15    9   27    5 |    20   34   28   21   33   20   33   24   20   25    22
  29  |   10   23    8   11   11    5   28   10   10   30    5 |    13   29   13   10   15   11   33   15   13   17    12
  30  |    7   11    6    7   15    3   16   11   12   23    4 |    23   28   26   22   30   23   27   25   24   25    24
  31E |   10   21    9    8   21    5   32   14   13   26    5 |    21   32   24   22   36   23   29   22   27   30    22
 X32  |   10   17    8   12  ---    7   24    7    7   19    4 |    16   21   16   17  ---   13   20   17   13   16    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   22   11   10   18    6   24   18   13   23      |T   27   36   31   28   39   44   36   31   28   30    28
 WRMS |    8   22   11    9   16    5   24   11    9   23      |NE  19   28   22   20   31   43   27   21   18   21    20
 MEDI |    8   21   10   10   17    5   25   12   10   22      |MD  20   31   24   21   31   21   29   22   21   24    21

Table 3.1631.2   GPS week: 1631   Day: 2   MJD: 55663.000                            

        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  |    5  ---  ---  ---  ---   39  ---  ---  ---  ---    0 |    50  ---  ---  ---  ---   49  ---  ---  ---  ---    50
   2E |   16   24   12   13   18    7   20   18   12   19    5 |    48   49   50   46   52   42   47   46   44   45    45
   3  |    8   13    8   10   13    4   17    6   11   14    3 |    12   16   16   16   22   12   22   13   15   15    13
   4E |   28   22   13   12   22    8   18   28   21   28    7 |   109  105  102   99  102  102  102  106  103  109   103
   5  |    6   22   12    8   15    4   27   15   10   14    5 |    21   35   25   26   35   24   36   27   24   22    24
  X6  |    9   15  ---  ---  ---    9  ---   11   12  ---    6 |    17   19  ---  ---  ---   17  ---   18   18  ---    16
   7E |    7   13   13    8   13    5   26   15   12   15    4 |    19   28   23   16   31   17   27   20   24   18    18
   8E |   20   26   23   15   23    5   28   64   26   20   10 |    32   35   36   27   37   30   38   67   44   27    30
   9E |   18   19   10   12   17    6   20   22   18   25    6 |    48   46   46   52   42   46   44   60   53   46    47
  10  |    7   16   10    7   16    3   14   11    7   15    4 |    21   22   23   19   27   19   24   20   19   17    18
  11  |    7   16   13   12   20    4   19    7   15   17    4 |    19   24   24   20   26   18   24   20   18   19    17
  12  |    8   27    7   11   16    6   25   18    8   28    5 |    21   31   22   22   28   20   26   24   23   21    20
  13  |    6   19    7    9   18    5   24   13   10   20    4 |    21   32   25   22   37   21   33   22   24   20    22
  14  |    9   28   10   11   14    7   29   14   13   16    5 |    21   35   33   31   35   27   35   27   24   28    27
  15  |    8   26    7   14   17    7   31   12   12   18    5 |    19   32   22   28   32   23   34   23   22   27    21
  16  |   10   25    9   16   17    6   30   12   14   24    5 |    19   31   21   27   28   20   34   19   24   23    21
  17  |   12   18   12   12   13    4   20    9   13   24    5 |    21   25   22   16   21   18   29   17   20   17    16
  18  |   12   27   12   17   14    6   30   10   10   15    5 |    17   38   28   32   34   24   33   24   26   21    24
  19  |    8   19   10   13   19    7   23   11   12   23    5 |    19   26   22   20   34   17   32   25   20   20    19
  20  |   11   26   12   12   20    7   22   14   10   22    5 |    13   25   27   21   27   18   22   23   18   19    17
  21E |   11   23    8   12   14    4   21   14   15   19    5 |    18   28   22   19   33   20   31   20   24   25    20
  22  |   10   24   11   11   17    7   30   10   10   15    5 |    18   37   32   34   34   28   32   28   31   24    27
  23  |    8   22    9   17   15    6   26    8    8   23    5 |    17   31   22   26   29   21   32   21   20   22    20
  24E |   20   23   13   13   19   14   15   15   27   19    6 |   108  115  106  103  113  105  112  109  110  115   109
 X25  |    8   18    8   11   15    3   26   15   13  ---    5 |    30   33   30   31   39   26   43   30   24  ---    29
 X26  |    7   14   10    9   11    5  ---    9    9  ---    4 |    19   20   20   22   24  261  ---   19   21  ---    20
  27E |   15   14   14   11   19    6   20   29   19   29    6 |    24   33   32   28   37   25   39   29   31   37    27
  28  |   12   21   12   14   12    6   27   24   10   25    6 |    20   36   32   31   38   25   37   23   26   23    25
  29  |   12   20    8   10   12    6   24    8   12   28    5 |    12   27   16   14   15   17   30   15   15   21    13
  30  |    7   14    7    9   10    4   17   11   13   18    4 |    25   26   22   23   26   20   28   22   19   22    20
  31E |   12   23    8   12   16    5   32   13   14   23    5 |    23   39   27   30   37   24   35   29   23   37    28
  32  |   11   19    9   15   16    6   17    5    9   20    4 |    12   19   21   20   23   16   24   18   15   18    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   12   21   11   12   17    6   24   19   14   21      |T   27   35   31   30   36   36   37   31   29   30    28
 WRMS |   10   21   11   12   16    6   24   10    9   21      |NE  20   28   24   23   29   32   30   21   21   21    21
 MEDI |    9   21   10   12   16    6   24   13   12   20      |MD  20   31   24   26   33   21   33   23   24   22    21

Table 3.1631.3   GPS week: 1631   Day: 3   MJD: 55664.000                            

        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  |    5  ---  ---  ---  ---   40  ---  ---  ---  ---    0 |    58  ---  ---  ---  ---   49  ---  ---  ---  ---    61
   2  |   13   23    9   12   15    5   24   11    9   15    4 |    35   47   46   45   46   42   46   45   44   44    42
   3  |    6   14    5    9   11    5   16    8    5   13    3 |    16   19   19   23   23   17   21   17   19   20    17
   4E |   14   26   11   12   19   10   15   15   11   22    5 |   147  148  145  146  142  142  145  142  147  146   144
   5  |    5   24   10   11   17    6   23   12    9   15    4 |    18   31   21   23   28   20   32   20   22   21    19
   6  |    5   16    4    9   19    5   16   10    4   11    3 |    21   23   23   28   22   20   23   24   19   26    20
   7E |    8   15    8    9   18    7   24   12    6   11    4 |    20   24   22   18   34   17   31   17   20   15    18
   8E |   21   34   21   16   19    6   29   55   18   17    9 |    27   36   32   30   42   28   37   62   37   25    28
   9E |   14   19    9   14   16    7   20   21   10   19    5 |    60   59   63   67   62   64   62   75   61   67    62
  10  |    7   16    7    7   15    4   15   12    7   16    3 |    28   29   29   26   30   26   32   30   30   30    27
  11  |    6   18    9   11   21    5   17    8    9   16    4 |    18   27   19   16   25   18   29   21   24   19    16
  12  |    8   27    8   21   12    5   29   16   10   26    5 |    22   31   24   35   31   22   31   25   23   24    22
  13  |    5   18    6    8   19    6   25    9    8   18    4 |    25   34   28   24   39   24   38   24   26   21    24
  14  |   11   25   10   16   10    7   28   19    9   17    5 |    23   34   31   31   32   26   35   30   25   25    26
  15  |    7   24    6    9   16    6   26    9   11   19    4 |    20   30   22   22   30   20   32   23   26   22    20
  16  |    6   30    8   12   15    4   30   11   10   21    5 |    26   32   26   30   30   24   33   26   25   24    24
  17  |    7   16    7   15    8    7   22   11    5   23    4 |    25   29   23   22   25   22   34   22   20   23    21
  18  |    9   27    6   13   18    4   28   12   12   16    5 |    13   34   24   22   34   19   33   22   20   17    19
  19  |    9   21   10    8   14    6   22   10   12   24    4 |    22   29   19   20   20   19   33   26   27   22    20
  20  |   10   25   10   14   16    5   25   17   11   19    5 |    14   25   18   20   24   15   26   24   17   19    14
  21E |    5   27    8   10   24    6   23   12   14   20    5 |    26   35   26   27   36   23   37   28   29   26    25
  22  |    9   22   10    9   19    4   24   14    7   15    4 |    18   33   28   23   35   23   30   29   23   21    22
  23  |    8   22    7   15   14    6   28   11    9   21    4 |    22   31   23   25   29   21   35   24   21   21    20
  24E |   20   21   13   11   21   14   17   17   21   21    6 |   102  106  106  104  107  104  108  105  107  111   105
 X25  |   12   16    8    9   11    5   23   18    9  ---    4 |    34   32   35   33   45   30   43   32   30  ---    31
  26  |    6   17    8   10   11    5   13   10   10   17    3 |    23   23   16   23   27  138   21   26   24   27    22
  27E |   12   18   10   11   14    7   23   24   14   24    5 |    29   40   33   29   40   29   46   33   34   40    31
  28  |    7   24    9   14   15    8   30   23    5   20    5 |    25   37   31   31   36   26   39   29   27   24    26
  29  |   10   25    7   12   10    6   27   10    9   29    5 |    15   31   12   12   15   13   32   15   19   19    13
  30  |    5   15    9    7   11    3   16   11    6   14    3 |    27   27   24   29   33   25   30   27   29   26    26
  31E |   11   21   10   15   13    5   27   22   11   18    5 |    30   40   39   32   35   33   40   36   32   38    32
  32  |    9   20    5   15   11    7   20   10    7   17    4 |    18   23   20   22   21   18   24   23   18   20    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   22    9   12   16    6   23   17   10   19      |T   31   38   33   33   38   34   39   34   33   32    31
 WRMS |    8   22    9   12   14    6   22   12    6   20      |NE  23   29   23   24   28   27   31   24   23   22    22
 MEDI |    8   21    8   11   15    6   23   12    9   18      |MD  23   31   24   26   32   23   33   26   25   24    22

Table 3.1631.4   GPS week: 1631   Day: 4   MJD: 55665.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   26  ---  ---  ---  ---   40  ---   28   35  ---   21 |    45  ---  ---  ---  ---   44  ---   13   36  ---    36
   2  |   10   28    8   10   20    6   28   12   10   16    5 |    15   31   22   16   27   17   22   24   23   25    19
   3  |    6   14    7   10   13    3   11    8   10   13    3 |     9   17   15   17   19   13   12   14   16   18    12
   4  |    9   21    7    9   16    5   15   10   10   24    4 |    79   85   83   79   86   80   83   81   83   83    82
   5  |    9   21   10    8   20    7   26   11    9   13    4 |    14   28   18   18   27   14   25   16   21   16    15
   6  |    5   14    8    9   10    4   12    9   12   12    3 |    12   18   16   18   23   14   14   18   17   20    14
   7E |    7   17    9    8   12    4   23   10   10   14    4 |    17   27   22   15   28   16   25   19   19   15    17
   8E |   21   30   15   12   17    7   26   52   19   19    9 |    23   36   25   23   36   28   37   62   40   25    27
   9E |   17   25   14   15   26    7   23   35   19   40    8 |    82   79   82   82   82   77   83   83   83   69    80
  10  |   10   18    8    5   17    4   19   14    8   19    4 |    22   25   25   23   25   21   23   27   24   31    23
  11  |    7   18   12   15   20    5   21   11   15   17    5 |    15   24   14   15   29   15   25   19   17   19    13
  12  |    8   29   10   10   15    5   30   14   11   26    5 |    19   32   26   22   28   19   28   25   20   25    20
  13  |    7   21    6   10   19    6   25    7   10   19    4 |    20   34   25   22   37   20   32   21   23   19    21
  14  |   12   23    9   17   12    7   31   15   10   17    5 |    22   34   34   34   32   26   31   31   28   24    27
  15  |    8   24    8    9   14    5   28    9    8   17    4 |    17   29   25   26   31   20   28   23   23   26    20
  16  |    9   24    6   12   12    4   29    8   10   22    4 |    16   27   23   23   28   18   27   19   22   20    18
  17  |    6   22   12   11   11    7   24    9   12   25    4 |    14   27   19   14   17   13   28   14   20   18    13
  18  |   10   28   11   12   14    5   32   11   12   15    5 |    13   34   29   28   32   21   30   24   25   17    21
  19  |    9   23    9   14   12    5   23   11   15   26    5 |    20   27   18   16   14   14   28   20   19   20    16
  20  |    8   23   14   15   15    5   26   17   14   20    5 |    14   24   25   24   22   16   23   23   15   19    16
  21  |    8   34    8    8   15    5   19    9    7   20    4 |    38   50   43   39   43   35   40   38   40   39    39
  22  |    9   23   10    8   18    6   33   14   12   15    5 |    15   30   27   22   33   20   28   24   23   16    20
  23  |    8   21    9   15   13    4   27   11   10   22    5 |    19   30   25   23   29   18   27   21   19   19    18
  24E |   18   20   17   12   22   12   17   15   22   18    6 |   106  113  112  104  117  108  114  112  108  114   109
 X25  |    9   19    8   10   12    5   24   16   12  ---    5 |    29   36   32   30   41   27   41   33   25  ---    29
  26  |    7   13    9    9   14    6   13   11   11   17    4 |    14   20   19   16   21   55   14   19   19   16    16
  27E |   12   21    9    8   22    5   21   21   12   23    5 |    24   34   29   28   41   25   36   30   27   36    27
  28  |    8   27   10   17   16    5   30   19   11   21    5 |    17   36   28   29   38   24   31   27   29   21    24
  29  |    9   20    7   11   12    5   23   10    9   26    4 |    16   30   17   16   20   16   32   20   20   22    17
  30  |    6   11    6    8   11    3   15    5    9   16    3 |    22   30   26   25   33   25   22   24   26   23    24
  31E |    8   29   10   11   10    6   29   14   13   14    5 |    20   38   26   19   30   22   29   21   23   22    20
  32  |    9   20    9   16   13    6   20    8   10   22    4 |    26   30   33   26   29   26   25   28   24   24    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   23   10   12   16    6   24   16   12   20      |T   26   35   31   28   35   28   33   30   29   28    27
 WRMS |    8   22   10    9   15    5   23   10    9   19      |NE  18   28   23   22   27   21   26   21   22   20    19
 MEDI |    9   21    9   10   14    5   24   11   11   19      |MD  19   30   25   23   29   20   28   23   23   21    20

Table 3.1631.5   GPS week: 1631   Day: 5   MJD: 55666.000                            

        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  |    6  ---  ---  ---  ---  289  ---  ---  ---  ---    0 |    39  ---  ---  ---  ---  231  ---  ---  ---  ---    39
   2  |    8   27    9   15   16    7   27   15   10   17    5 |    11   24   15   16   21   12   18   17   15   23    11
   3  |    7   17    5   12   13    4   13   10   12   15    3 |    11   17   12   15   19   13   15   12   15   16    12
   4  |    8   19    7   14   16    5   17    9    9   24    4 |    75   79   76   74   76   75   75   76   77   82    75
   5  |    5   26    7   15   18    6   26    8   10   12    4 |    12   28   15   19   26   14   25   14   15   13    12
   6  |    7   16    5   15   11    3   14   10   13   11    3 |    14   21   16   20   20   16   17   16   18   18    15
   7E |    8   17   11   13   16    6   20   11   11   12    4 |    16   25   19   16   33   13   23   16   21   11    16
   8E |   20   24   12   14   13    5   22   43   26   18    8 |    29   37   32   31   39   31   41   53   48   28    32
   9E |   17   33   11   16   29    4   19   31   23   28    8 |    56   58   54   57   46   56   54   77   65   62    57
  10  |    6   16    5   10   15    5   18   13    9   19    4 |    22   24   23   24   25   21   25   26   23   29    22
  11  |    6   16    7   15   21    7   21   11   16   16    4 |    19   23   21   17   27   19   24   21   24   26    17
  12  |    7   27   10   15   14    4   29   16   13   24    5 |    15   30   23   20   26   18   26   22   17   21    17
  13  |    4   19    5   16   18    4   25    9   14   17    4 |    20   33   20   19   37   19   32   20   25   19    19
  14  |   10   26    8   20   12   10   28   20    9   17    5 |    21   34   29   30   30   23   32   28   25   21    23
  15  |    8   25    9   13   14    5   28   11   10   18    4 |    16   27   22   18   25   17   26   20   23   24    17
  16  |    8   25    6   14   13    5   26   10    9   22    4 |    16   29   20   22   28   19   29   19   17   21    18
  17  |    8   19   12   15    8    7   21   11   11   22    4 |    17   28   24   17   21   17   29   16   20   18    16
  18  |    7   26    8   15   16    6   27   11   10   14    4 |    12   34   23   22   29   19   29   24   20   16    18
  19  |    7   24    8   16   12    6   23   13   19   28    5 |    17   26   17   18   14   16   26   20   21   21    15
  20  |    8   27    9   17   16    6   29   17   18   18    5 |    13   23   16   21   22   15   25   24   24   16    13
  21  |    6   23    9   14   18    7   18    8   11   20    4 |    15   29   19   20   32   15   24   14   20   20    16
  22  |    7   26    8   13   17    6   28   14   11   15    5 |    14   32   23   22   32   16   27   23   18   14    17
  23  |    6   20    7   18   14    4   28   11   14   23    5 |    18   30   20   19   27   18   30   20   25   18    17
  24E |   10   20   10   19   20    7   16   15   16   19    5 |   130  136  136  129  140  131  140  137  131  136   134
 X25  |    7   19    7   13   11    5   25   16   10  ---    4 |    23   30   27   27   39   25   38   29   25  ---    25
  26  |    5   18    6   15   13    5   13    9   10   16    3 |    18   17   13   20   22  102   13   21   22   19    18
 X27E |   11   18    8   12   23    4  ---   21   15   21    5 |    24   34   27   28   38   25  ---   31   28   34    26
  28  |    7   27    9   17   14    7   28   17   11   20    5 |    19   37   25   23   36   19   33   21   25   17    21
  29  |    8   19    8   14   12    6   24   10   12   24    4 |    14   23   13   12   15   13   28   18   18   23    13
  30  |    4   14    6   13    9    5   16    8   11   15    3 |    19   28   21   23   26   21   22   19   23   22    20
  31E |    8   19    6   15   16    8   30   15   14   13    5 |    34   42   36   31   40   37   42   32   38   35    34
  32  |   10   19    5   17   12    6   20   10   14   20    4 |    16   21   22   22   21   20   22   20   26   22    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   22    8   15   15    6   23   15   14   19      |T   24   34   27   27   33   34   33   29   29   28    25
 WRMS |    7   22    8   14   15    6   22   11   11   18      |NE  17   27   20   20   25   30   26   20   21   19    18
 MEDI |    7   20    8   15   14    6   23   11   11   18      |MD  17   29   22   21   27   19   26   21   23   21    18

Table 3.1631.6   GPS week: 1631   Day: 6   MJD: 55667.000                            

        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  |    5  ---  ---  ---  ---   59  ---  ---  ---  ---    0 |    37  ---  ---  ---  ---  114  ---  ---  ---  ---    34
   2  |   10   31    7   13   16    5   26   17    8   23    5 |    15   31   17   18   24   14   21   22   19   27    14
   3  |    7   16    7   11   14    5   15    8   10   16    3 |    14   19   17   24   26   18   15   15   23   20    17
   4  |    8   21    7   10   11    4   16   14    6   20    4 |   114  120  117  115  117  114  115  114  112  124   115
   5  |    6   27    7   11   18    5   23   10    9   13    4 |    14   29   16   16   27   15   25   19   17   14    13
   6  |    7   16    9   12   13    4   16    8   11   13    3 |    20   26   24   29   29   23   21   23   28   24    24
   7E |    5   20    8   14   13    5   21   16   10   15    4 |    21   27   22   22   33   19   28   23   26   18    21
   8E |   16   20   11   14   19    4   22   34   24   15    7 |    36   44   38   36   54   39   44   54   53   39    41
   9E |   15   23   13   10   22    5   19   26   16   24    6 |    59   62   65   67   58   63   61   67   65   54    59
  10  |    7   14    7    7   11    3   15   20    8   23    4 |    27   25   27   24   30   25   28   26   27   22    24
  11  |    5   19   10   11   22    6   20   11   14   19    4 |    20   26   21   21   26   20   25   23   20   32    17
  12  |    9   29    7   12   14    7   27   15   11   24    5 |    25   32   32   31   29   24   27   30   22   30    24
  13  |    5   22    6   12   18    5   24   13    8   18    4 |    26   34   29   29   38   24   34   28   26   24    25
  14  |   10   23    9   16   14    7   26   20   10   16    5 |    28   39   38   40   40   33   34   37   33   29    32
  15  |    8   25   11    9   16    4   25    8   12   20    5 |    24   32   31   31   32   28   29   28   32   31    27
  16  |    7   25    9   14   13    6   27    8   10   19    4 |    22   29   27   29   31   23   28   24   27   26    24
  17  |    5   19    8   12   11    5   22   12    8   21    4 |    22   30   26   20   26   20   37   20   20   17    20
  18  |    7   24   11   14   16    4   30   12   18   15    5 |    12   32   27   26   31   18   30   23   17   15    18
  19  |    7   23   10   14   13    6   22   11   10   29    5 |    24   29   21   22   19   20   31   23   25   28    20
  20  |    6   25    9   16   14    6   27   14    9   15    4 |    16   24   23   27   23   18   22   25   23   21    17
 X21  |    5  ---   20    8   18   10   18    9   17   22    5 |    21  ---   34   23   34   22   27   21   22   28    22
  22  |    6   19   13   12   18    7   27   13   17   14    5 |    18   30   30   27   36   21   26   29   24   17    22
  23  |    5   24    7   14   10    6   25   11   11   24    4 |    23   34   27   30   31   22   30   26   23   26    22
  24E |    8   20   12   13   20    7   15   18   13   22    5 |    78   91   83   77   81   79   88   78   80   77    81
 X25  |    8   18   10   11   12    4   25   17   11  ---    4 |    36   33   36   34   44   33   42   35   33  ---    33
  26  |    6   15   10   11   13    4   14   12   10   17    4 |    22   19   17   20   24   90   16   23   27   24    21
  27E |    9   17    8    9   16    6   17   17   11   21    4 |    34   42   39   35   45   35   46   34   35   41    36
  28  |    7   29    9   14   13    4   29   13   16   20    5 |    23   40   31   32   42   27   34   27   30   24    27
  29  |    7   18    6   11   14    4   21   16   10   25    4 |    20   30   17   17   16   18   32   22   24   27    19
  30  |    5   14    9   10   10    3   15    9    9   13    3 |    30   33   29   31   35   29   28   30   31   29    29
  31E |   10   19    9   13   11    9   29   23   16   13    5 |    29   44   39   38   38   34   38   40   34   42    33
  32  |    8   20    9   15   10    8   20   11   11   16    4 |    24   22   28   33   28   25   21   28   30   21    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   22    9   12   15    5   22   15   12   19      |T   29   36   33   33   37   34   34   32   32   31    29
 WRMS |    7   22    9   11   13    6   22   12    9   17      |NE  22   29   26   26   30   29   27   25   25   23    23
 MEDI |    7   20    9   12   14    5   22   13   11   19      |MD  23   31   28   29   31   24   29   26   27   26    24



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 4.1631   GPS week: 1631   MJD: 55661.0-55667.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3013 |U    7     8    24 |U   13    13    85 |U    8    13    29 |
emr | emr 2917 |U   10    12    32 |U   13    12    86 |U   11    13    32 |
esa | esa 2934 |     8     8    24 |U   12    12    82 |     7    13    30 |
gfz | gfz 2923 |U   10    11    30 |U   18    17    81 |U   14    14    38 |
grg | grg 2926 |     9     9    25 |U   12    13    80 |     8    12    30 |
igr | igr 2871 |     9    11    27 |    14    15    87 |    10    14    34 |
igs | igs 2916 |     7     8    23 |    13    12    58 |     8    12    30 |
jpl | jpl 2872 |U    9     9    27 |U   15    13    85 |     9    14    33 |
mit | mit 2989 |U    7     8    21 |U   13    13    85 |U    8    12    30 |



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 5.1631.0   GPS week: 1631   Day: 0   MJD: 55661.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3000 |     7    11    23 |     7     8    28 |     6    11    16 |
emr | emr 2860 |    11    13    32 |     8     9    22 |    10    17    31 |
esa | esa 2880 |     9    10    25 |     6     6    19 |     5    12    22 |
gfz | gfz 2930 |     9    13    33 |    17    11    50 |     5    11    32 |
grg | grg 2949 |     9    10    25 |     6     8    22 |     5     7    22 |
igr | igr 2911 |     8    11    26 |    17    20    34 |     5    12    20 |
igs | igs 2939 |     7    10    25 |     6     5    19 |     5    12    18 |
jpl | jpl 2860 |     9    11    25 |     6     9    21 |     7    11    23 |
mit | mit 3072 |     8     9    22 |     6     7    19 |     5     9    18 |

Table 5.1631.1   GPS week: 1631   Day: 1   MJD: 55662.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2943 |     6     9    25 |     5     8    21 |    11    14    29 |
emr | emr 2860 |     9    11    36 |     7     7    25 |    15    15    31 |
esa | esa 2880 |     7     9    27 |     5     7    20 |    11    13    28 |
gfz | gfz 2861 |    10    12    34 |    14    14    47 |    12    11    23 |
grg | grg 2755 |     8    13    32 |     6    10    27 |    10    11    22 |
igr | igr 2686 |     7     8    26 |     5     8    27 |    12    12    28 |
igs | igs 2837 |     7     9    29 |     5     9    22 |    11    12    26 |
jpl | jpl 2761 |     9    10    30 |     6     8    25 |    15    17    37 |
mit | mit 2880 |     7     9    25 |     6    12    45 |    12    10    22 |

Table 5.1631.2   GPS week: 1631   Day: 2   MJD: 55663.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3023 |     8    11    22 |     6     7    23 |     7     7    19 |
emr | emr 2953 |    11    14    33 |     9     8    33 |     9     5    12 |
esa | esa 2880 |    10    11    22 |     6     7    23 |     8     9    17 |
gfz | gfz 2854 |    10    10    23 |    16    12    48 |    14     9    21 |
grg | grg 2880 |    11    10    20 |     7     6    24 |     6     5    27 |
igr | igr 2855 |    16    17    38 |     8    14    28 |    16    14    37 |
igs | igs 2921 |     9    10    20 |     6     6    21 |     8     5    18 |
jpl | jpl 2763 |    15    14    27 |     7    10    32 |     8     7    18 |
mit | mit 2976 |  ----  ----  ---- |     6     8    20 |  ----  ----  ---- |

Table 5.1631.3   GPS week: 1631   Day: 3   MJD: 55664.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3039 |     6     6    19 |     7     9    20 |     7     8    20 |
emr | emr 2960 |    10     8    30 |     7     9    28 |    10    10    16 |
esa | esa 2976 |     6     7    22 |     6     9    22 |     7    10    16 |
gfz | gfz 2949 |     8     8    24 |    14    17    51 |    24    14    42 |
grg | grg 2976 |     8     7    25 |     7    10    30 |     8    11    22 |
igr | igr 2861 |     6     8    21 |     6     9    22 |     7    10    18 |
igs | igs 2918 |     6     6    21 |     6     8    24 |     7     9    19 |
jpl | jpl 2952 |     8     8    28 |     7    11    25 |     8    10    19 |
mit | mit 2976 |     7     6    21 |     6     9    27 |     8    10    21 |

Table 5.1631.4   GPS week: 1631   Day: 4   MJD: 55665.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3029 |     9     5    27 |    32     9   255 |     7     8    18 |
emr | emr 2960 |    10    10    31 |    28    10   248 |    11     8    21 |
esa | esa 2976 |     8     5    25 |    27    13   248 |     6     7    19 |
gfz | gfz 2953 |    10     7    28 |    31    19   130 |    22    13    39 |
grg | grg 2976 |     8     8    23 |    25    11   215 |     8     7    23 |
igr | igr 2898 |     7     6    23 |    27    11   243 |     7     6    16 |
igs | igs 2914 |     7     6    23 |    37     8    79 |     7     7    17 |
jpl | jpl 2946 |     8     7    26 |    29    12   255 |     8    12    20 |
mit | mit 3072 |     8     7    22 |    27     9   237 |     7     6    16 |

Table 5.1631.5   GPS week: 1631   Day: 5   MJD: 55666.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3026 |     8     6    24 |    28    37   226 |     6     8    16 |
emr | emr 2962 |     9     7    28 |    25    31   221 |     8     8    20 |
esa | esa 2976 |     7     6    21 |    27    34   220 |     6     7    17 |
gfz | gfz 2955 |    12     9    28 |    27    35   207 |     6     8    18 |
grg | grg 2976 |     8     8    24 |    25    34   212 |     8    10    21 |
igr | igr 2938 |     7     6    20 |    26    30   234 |    11    13    25 |
igs | igs 2929 |     7     6    19 |    25    35   214 |     6     7    16 |
jpl | jpl 2865 |     8     6    24 |    39    32   214 |     7     8    17 |
mit | mit 2976 |     7     7    17 |    27    35   220 |     7     9    16 |

Table 5.1631.6   GPS week: 1631   Day: 6   MJD: 55667.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3037 |     7     7    24 |     9    11    24 |     8    32    87 |
emr | emr 2868 |    13    20    36 |     9     8    25 |    12    30    90 |
esa | esa 2976 |     8     7    24 |     9    11    22 |     8    33    90 |
gfz | gfz 2961 |    14    18    38 |    10    14    33 |    16    31    93 |
grg | grg 2975 |     9     7    27 |     9    14    28 |    14    31    76 |
igr | igr 2952 |    16    19    33 |     9    11    21 |     9    33    93 |
igs | igs 2957 |     8     7    23 |     9    14    28 |    10    32    92 |
jpl | jpl 2958 |     9     7    27 |    10    10    28 |     8    32    96 |
mit | mit 2976 |     7     7    21 |     9    11    27 |    10    28    88 |


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 6.1631   GPS week: 1631   MJD: 55661.500-55667.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -13     -63      42      19      7 |       8     14
            |      17      15      81      93      7 |       1
emr   uuuxu |      45      33      78     349     -8 |      80     82
            |      36      21      45      84     16 |       2
esa   uuuuu |     -76     -60     -41    -129     -1 |      19     22
            |       8      39      85      44      4 |       1
gfz   uuuux |     -64      24      72    -113    -12 |      12     30
            |      28      23      38     129     32 |      11
grg   uuuux |      30     -41      87     -27      5 |       3     13
            |      25      36     172      94     13 |       3
igr   xxxxx |     -26      33     -16      25      1 |      -8     14
            |      13      24      63      38     11 |       4
irf   xxxxx |      27      11      -6      54     -2 |      -5     14
            |      11      12     121      42      8 |       2
jpl   uuuux |     -15      -1      38     209    -25 |      35     41
            |      61      39      59     106     19 |       5
mit   uuuuu |      31      17      53      76     -6 |      16     21
            |      16      25     192      46      6 |       2
ngs   uuuuu |      49      12    -152     144      1 |       4      8
            |      31      38     102     106      1 |       2
sio   uuxuu |     105      79    -344     -33     -1 |      54     55
            |      19      11     133      79      7 |       2


Table 7.1631.0   GPS week: 1631   Day: 0   MJD: 55661.500

                                                         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     -71     147     141      5 |       8     14
emr   uuuxu |      57      64     111     467     16 |      77     78
esa   uuuuu |     -81     -96     -77    -158     -2 |      19     23
gfz   uuuux |     -38      52      55     -36    -45 |      28     33
grg   uuuux |      -8     -89     426     -61    -20 |       7     15
igr   xxxxx |     -24      51     -65      50     -2 |      -2     12
irf   xxxxx |      25      27    -137      56    -10 |      -2     11
jpl   uuuux |      12      13     104     170     -2 |      38     42
mit   uuuuu |      25      43    -172      71     -5 |      19     22
ngs   uuuuu |      79      12    -100     221      1 |       7     11
sio   uuxuu |      96      94    -411    -129     -3 |      57     58

Table 7.1631.1   GPS week: 1631   Day: 1   MJD: 55662.500

                                                         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     -63     137      91     12 |       7     13
emr   uuuxu |      55      16      82     323      9 |      80     81
esa   uuuuu |     -64    -115      60     -96      4 |      19     23
gfz   uuuux |     -42      36      71     -36    -42 |      23     33
grg   uuuux |      54     -52      44     -14     13 |       3     15
igr   xxxxx |     -35       7     -14      -3     -4 |      -4     12
irf   xxxxx |      40      21    -117      95     -6 |      -3     12
jpl   uuuux |     -62     -45      82     153    -23 |      40     43
mit   uuuuu |      46      37    -149     136     -4 |      18     22
ngs   uuuuu |     -10      57    -119       1      0 |       6      9
sio   uuxuu |     127      76    -443     -63      2 |      55     57

Table 7.1631.2   GPS week: 1631   Day: 2   MJD: 55663.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      16     -62     -63     -38      0 |       9     14
emr   uuuxu |       1       7     114     341     -6 |      83     84
esa   uuuuu |     -69     -85      63    -189     -5 |      20     23
gfz   uuuux |     -44     -13      89      48    -45 |      19     33
grg   uuuux |      37     -67      94     -28     11 |       5     16
igr   xxxxx |     -29      10       6      50     -5 |      -5     12
irf   xxxxx |      31      21     -96      57    -11 |      -3     12
jpl   uuuux |     -66      68      95      61    -25 |      41     43
mit   uuuuu |      35      37     -82      55    -13 |      19     22
ngs   uuuuu |      51      62    -288     190      3 |       6      9
sio   uuxuu |     121      85    -459     -93     -3 |      56     57

Table 7.1631.3   GPS week: 1631   Day: 3   MJD: 55664.500

                                                         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     -57      68      89     15 |       6     13
emr   uuuxu |     -11      14      56     191     -6 |      81     82
esa   uuuuu |     -85     -32    -123    -110      5 |      17     21
gfz   uuuux |     -47      16       1     -78     -9 |       9     32
grg   uuuux |      -2     -35      38     -29     -3 |       4     16
igr   xxxxx |     -45      75      71     -37    -13 |     -10     14
irf   xxxxx |      16       6      30      85      9 |      -7     16
jpl   uuuux |      96     -26      11     143     -2 |      37     41
mit   uuuuu |      16      10     168     137      4 |      15     21
ngs   uuuuu |      52      16     -12      47     -1 |       3      7
sio   uuxuu |      95      62    -353      42     12 |      52     53

Table 7.1631.4   GPS week: 1631   Day: 4   MJD: 55665.500

                                                         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 |     -29     -85     -23      15     14 |       8     14
emr   uuuxu |      72      39     132     354    -12 |      82     83
esa   uuuuu |     -77     -11     -18    -175     -1 |      18     22
gfz   uuuux |    -107      15     107    -120      9 |       5     29
grg   uuuux |      31     -45     136    -102     18 |      -1     10
igr   xxxxx |      -3      17      51      38      4 |     -11     16
irf   xxxxx |      40      12      -4      86      6 |      -6     15
jpl   uuuux |     -35     -36     -53     302    -34 |      36     40
mit   uuuuu |      55      19      73      80     -1 |      15     21
ngs   uuuuu |      48     -30    -262     148      0 |       2      7
sio   uuxuu |     117      75    -392      94      4 |      53     54

Table 7.1631.5   GPS week: 1631   Day: 5   MJD: 55666.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -16     -36     -13    -126     -1 |      10     14
emr   uuuxu |      82      42       7     391    -29 |      82     83
esa   uuuuu |     -86     -34     -35     -81     -7 |      19     22
gfz   uuuux |     -91      12      66    -314     18 |       2     27
grg   uuuux |      39     -20      -1    -124     15 |       0     10
igr   xxxxx |     -18      29     -96       7      9 |     -11     15
irf   xxxxx |      24       1      86     -24     -2 |      -5     14
jpl   uuuux |     -66      14      -6     362    -54 |      32     39
mit   uuuuu |      27      -5     210      30    -12 |      16     21
ngs   uuuuu |      86       2    -206     309      3 |       2      7
sio   uuxuu |     105      72    -271     -74     -8 |      54     55

Table 7.1631.6   GPS week: 1631   Day: 6   MJD: 55667.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -33     -68      42     -38      2 |       9     14
emr   uuuxu |      62      51      43     373    -25 |      77     79
esa   uuuuu |     -72     -49    -160     -94     -2 |      17     21
gfz   uuuux |     -76      47     115    -255     30 |      -1     23
grg   uuuux |      57      24    -132     166      4 |       1      9
igr   xxxxx |     -31      42     -68      73     21 |     -12     16
irf   xxxxx |      10      -8     196      23     -1 |      -8     15
jpl   uuuux |      18       3      32     275    -39 |      25     39
mit   uuuuu |      12     -25     324      23    -10 |      12     19
ngs   uuuuu |      40     -36     -78      94      2 |       2      7
sio   uuxuu |      72      86     -77      -9     -9 |      52     53



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