[IGSREPORT-20028] Wk 1646 IGS Final Orbits

Jim Ray igs.acc at noaa.gov
Thu Aug 11 04:50:58 PDT 2011


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1646   (Jul 24, 2011 - Jul 30, 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:

igs1646[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1646[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1646[0-6].cls  IGS GPS clock combination summary report.
igs16467.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16467.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 of poorer consistency (GRG),
    they 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  |  EMR   | 6 3 6 26
                0  |  ESA   | 6 30 6 UNSA
                0  |  GFZ   | 19
                0  |  GRG   | NKLG SANT
                0  |  JPL   | 15 19 25 26 GUAT
                0  |  MIT   | 16 19 26 30 3 16 19 26 30 CAS1 CAS1 CEDU MDVJ
                1  |  COD   | MCM4 MCM4
                1  |  EMR   | 26
                1  |  ESA   | UNSA
                1  |  GFZ   | MDVJ
                1  |  GRG   | IRKJ SANT
                1  |  JPL   | 6 25 26
                1  |  MIT   | 5 26 30 3 26 30 DAV1 MDVJ DAV1 MDVJ
                2  |  EMR   | 3 6
                2  |  ESA   | NTUS UNSA
                2  |  GFZ   | 22 BOGT HOLM MDVJ NKLG RIOP
                2  |  GRG   | SANT
                2  |  JPL   | 15 25 26 PRDS
                2  |  MIT   | 1 11 26 30 1 3 6 11 26 30
                3  |  COD   | IISC
                3  |  EMR   | 3 6 3 6
                3  |  ESA   | 3 IRKJ UNSA
                3  |  GFZ   | 31 DAV1 MAS1 MDVJ NTUS
                3  |  GRG   | IRKJ
                3  |  JPL   | 25 26
                3  |  MIT   | 1 6 26 30 1 6 26 30 DAV1 NTUS USNO DAV1 NTUS USNO
                4  |  COD   | ALGO
                4  |  EMR   | 3 6 3 6
                4  |  ESA   | UNSA
                4  |  GFZ   | MDVJ
                4  |  GRG   | SANT
                4  |  JPL   | 3 18 25 26
                4  |  MIT   | 1 3 6 15 26 30 1 3 6 15 26 30 DAV1 MDVJ NNOR MDVJ
                4  |  MIT   | NNOR
                5  |  EMR   | 3 6 3 6
                5  |  ESA   | BJFS UNSA
                5  |  GFZ   | MDVJ
                5  |  GRG   | CEDU
                5  |  JPL   | 3 15 25 26 CEDU
                5  |  MIT   | 1 26 30 31 1 3 6 26 30 MDVJ USNO
                6  |  EMR   | 3 6 3 6 MATE MATE
                6  |  ESA   | UNSA
                6  |  GFZ   | MATE MDVJ
                6  |  JPL   | 25
                6  |  MIT   | 1 3 6 25 26 30 1 3 6 25 26 30 MAW1 BOR1 MAW1

 5. 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   |  30
                3  |  GRG   |  30

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

 7. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011
    (GPS Week 1631, day 6, MJD 55667) 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.  The IGS05 frame
    is also the basis for the homogeneously reprocessed IGS products from GPS
    Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products,
    are based on the IGS realization of the ITRF2008 reference frame (IGS08).
    For more information see IGSMAIL #6354.
    

 8. 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  |     .2     .4     .3      -9     -6     14     .0 
       EMR  |   -1.9   -4.2    -.2       1     11     10     .37
       ESA  |    -.3   -9.1   11.9     -66     -4     95     .10
       GFZ  |   -1.3     .2    -.1     -24     19      5     .04
       GRG  |    4.3   -5.0   13.5      -7     -6     -8     .0 
       JPL  |   -2.4    2.2  -10.1     -42     88     57   -1.22
       MIT  |    3.9  -11.0   22.1      -8      6    -18     .0 
       NGS  |    1.7    -.5   13.9     -37     22     -6     .04
       SIO  |    5.8   -5.1   -4.8     -97   -131     19    -.03


 9. Starting on 22-Oct-2000 (GPS Week 1085-0; mjd=51839) all IGS clock products
    are based on the new clock combination scheme which uses the clock RINEX
    files as input if available, otherwise SP3 clocks are used. 
    The navigation solution is still based on the SP3 clocks but this will soon
    adopt the clock RINEX files as well.

10. Starting on 27-Feb-2000 (GPS Week 1051-0; MJD 51601) the IGS final products
    are aligned to the IGS reference frame products (station coordinates and
    ERPs as generated by 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.

11. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011
    (GPS Week 1631, day 6, MJD 55667) the absolute antenna model is introduced
    (IGSMAIL #5438). The antenna phase center offsets and phase center
    variations are given in the file:
        ftp://igs.org/igscb/station/general/igs05.atx
    These antenna calibrations are also used in the homogeneously reprocessed
    IGS products from GPS Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) the absolute antenna
    model is updated (IGSMAIL #6255 & #6374) as given in the file:
        ftp://igs.org/igscb/station/general/igs08.atx
    The JPL solution does not yet use IGS08/igs08.atx, which causes their RMS
    clock residuals to be higher than for the other centres; for the same
    reason, the JPL solution is excluded from the weekly SINEX combination.

    
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 1.1646.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1646.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 2.1646.[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 3.1646.[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 5.1646.0-6).

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 1646 summary.                       (Jul 24, 2011 - Jul 30, 2011)

Table 1.1646.a   GPS week: 1646   MJD: 55766.000-55772.000

         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  253|    0     0    -2   -25     5    19  -.21    8    7 |    -252      51     16     76
        |    0     0     0    17     6    20   .03           |     600     712
emr   95|    0     0    -7   -79    10   -13   .38   18   18 |    2781     349     18    117
        |    1     2     1    35    19    11   .02           |    1068    1200
esa  124|    1     0     0    -2    61    24   .26    8    8 |    -408    -620     19    162
        |    1     0     0    15    12    17   .03           |    1198    2134
gfz  197|    0     0     3    -5   -65   -25  -.28   13   12 |     -77     219     24    135
        |    1     1     1   116    73    21   .02           |     162     251
grg  131|    1     1    10   -32    31    -4   .72   16   14 |    1685     317     46    227
        |    0     1     1    28    30    14   .08           |     962    1107
igr  n/a|    0     0     1   -30    -2   -61  -.09    5    5 |    6019     533     21     98
        |    0     0     0    15    25     5   .03           |    1363    1190
jpl  137|   -1     0   -12     9  -181    -4   .54   18   18 |    1281     322     22    303
        |    0     0     1    15    12    29   .04           |     954    1092
mit  268|    0    -1     2   -16   -48   -29  -.36   13   10 |     751    -497     24    197
        |    0     0     1    32    22    15   .04           |    1551    2272
ngs  225|    0     0     2    43   -44   -15  -.18   10    7 |   -6438   90283   2022   3723
        |    1     0     1    58    36    23   .04           |  123283  578438
sio  252|    0     2    -2   160   252    10  -.29   19   19 |     ---     ---    ---    ---
        |    1     1     1    27    16     8   .02           |     ---     ---


Table 1.1646.b   GPS week : 1646   MJD: 55766.000-55772.000   

         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  |   46   33   25   25   25   17   19 |
   2  |    4    5    4    5    5    4    4 |
   3  |    6    6    5    6    6    5    6 |
   4  |    3    3    3    4    4    4    4 |
   5  |    4    5    4    5    5    5    5 |
   6  |    5    6    6    6    6    6    6 |
   7  |    4    4    4    4    4    4    4 |
   8  |    3    3    3    4    4    4    4 |
   9  |    4    4    4    4    4    4    4 |
  10  |    3    3    3    4    3    3    4 |
  11  |    3    3    4    4    4    4    4 |
  12  |    5    5    5    5    5    5    5 |
  13  |    4    4    5    4    4    4    5 |
  14  |    5    4    4    4    4    4    4 |
  15  |    4    4    4    5    5    5    5 |
  16  |    5    5    5    5    5    5    5 |
  17  |    4    4    4    4    4    4    4 |
  18  |    4    5    4    5    4    5    4 |
  19  |    4    4    4    4    4    5    5 |
  20  |    4    4    4    4    4    4    4 |
  21  |    4    4    4    4    5    5    5 |
  22  |    4    4    4    4    4    4    4 |
  23  |    4    4    4    4    4    4    5 |
  24  |    3    3    3    3    3    4    4 |
  25  |    5    5    6    5    5    5    5 |
  26  |    6    7    6    6    6    6    6 |
  27  |    4    4    5    4    4    4    4 |
  28  |    4    4    4    5    4    5    4 |
  29  |    5    5    5    5    5    5    5 |
  30  |    7   10    8   10   10    9   10 |
  31  |    6    4    4    5    5    5    5 |
  32  |    3    4    4    3    4    4    4 |



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1646.0   GPS week: 1646   Day: 0   MJD: 55766.000                            

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  253|    0     0    -2   -21     1    33  -.23    7    6 |     -61     111     19     85
        |                     30     2                       |
emr   95|    0    -1    -7   -43    24   -32   .38   18   18 |     703    2216     15    116
        |                     -3   -81                       |
esa  124|    1     0     0   -16    60    11   .25    7    7 |     138    -744     16    147
        |                     35   -24                       |
gfz  197|    0     2     2   -35   -43   -25  -.26   13   13 |      -8     367     23    132
        |                    -16     6                       |
grg  131|    1     1    11   -60   -26   -11   .66   15   13 |     -41    1912     50    212
        |                     17    31                       |
igr  n/a|    0     0     2   -32    14   -53  -.09    5    5 |    3518    2350     21     88
        |                     26    -6                       |
jpl  137|   -2     0   -11    14  -192    20   .48   18   17 |    -428    1908     24    319
        |                    -73   -39                       |
mit  281|    0    -1     1   -21   -51   -41  -.41   15   10 |     952    -374     26    171
        |                     -3    37                       |
ngs  225|    0     0     3    55   -31   -24  -.20    9    6 |  205411 -900425   2228   4098
        |                    -45   -16                       |
sio  252|   -1     1    -2   164   249     5  -.30   19   17 |     ---     ---    ---    ---
        |                    -78  -130                       |

Table 2.1646.1   GPS week: 1646   Day: 1   MJD: 55767.000                            

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  253|    0     1    -3   -28     6   -13  -.22    8    7 |     116   -1184     17     65
        |                     45   -24                       |
emr   95|    0    -1    -8   -67    45   -11   .39   18   18 |    3301   -1368     21     90
        |                      9   -88                       |
esa  124|    0     0     1     4    58    46   .27    7    7 |     933   -2890     21    167
        |                     25   -21                       |
gfz  197|    0     0     2   -74  -188   -15  -.29   13   12 |     -84     269     24    136
        |                    -31    45                       |
grg  131|    0     0    12   -18    64     1   .63   16   14 |    2244   -1465     43    201
        |                    -35  -119                       |
igr  n/a|    0     0     1   -31     7   -61  -.11    5    5 |    6229   -1232     21    103
        |                     35    16                       |
jpl  137|   -2    -1   -10     1  -172    31   .49   18   17 |    1754   -1413     23    310
        |                     74     8                       |
mit  281|    0     0     0   -32   -79   -19  -.42   13   10 |    1674   -3318     24    220
        |                      0    41                       |
ngs  225|    1     0     2    70     6   -39  -.23   10    7 | -219939  963078   1710   3891
        |                    -31   -40                       |
sio  252|    0     1    -4   163   228     4  -.29   19   17 |     ---     ---    ---    ---
        |                    -79  -125                       |

Table 2.1646.2   GPS week: 1646   Day: 2   MJD: 55768.000                            

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  253|    0     0    -1    10     8    32  -.16    7    7 |   -1539    1206     14     77
        |                      2   -25                       |
emr   95|    0     3   -10   -29    10     4   .40   18   18 |    1964    1133     17    117
        |                      0   -53                       |
esa  124|    0     0    -1    23    53    10   .29    8    8 |     693   -2852     19    173
        |                     28   -14                       |
gfz  197|    0     0     1  -191   -61   -44  -.25   11   11 |    -229     343     26    145
        |                    -31    35                       |
grg  131|    1     2     9    10    44    24   .65   17   16 |     834    1101     44    249
        |                    -76   -96                       |
igr  n/a|    0     0     1   -14   -23   -61  -.06    5    5 |    4826    1468     20    112
        |                     25    45                       |
jpl  137|   -2     0   -11    30  -179   -30   .56   19   18 |     371    1101     21    308
        |                    -13    76                       |
mit  281|    0    -1     3   -80   -58   -19  -.37   12    9 |   -1991    2307     23    189
        |                      7    35                       |
ngs  225|    1     0     4   144   -26    -7  -.18   10    8 |  -30276  571242   2184   3994
        |                    -90    54                       |
sio  252|   -2     2    -2   106   256    23  -.29   20   19 |     ---     ---    ---    ---
        |                    -58  -136                       |

Table 2.1646.3   GPS week: 1646   Day: 3   MJD: 55769.000                            

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  253|    0     0    -2   -25     5    -1  -.18    8    7 |    -146    -142     18     84
        |                     74   -11                       |
emr   95|    1    -3    -7   -82    -4   -20   .36   19   19 |    3657    -840     22    123
        |                     34   -42                       |
esa  124|    0     0     0   -20    52    50   .28    9    9 |     301   -2418     22    168
        |                     33   -11                       |
gfz  197|   -2     1     5   -31    42    -2  -.30   14   12 |     106      70     26    135
        |                    -12    31                       |
grg  131|    1     3    11   -26    18    -3   .75   17   16 |    2483    -527     49    271
        |                    -11   -17                       |
igr  n/a|    0     0     1   -56   -47   -66  -.05    5    5 |    6852    -346     24     95
        |                     51    14                       |
jpl  137|   -1     0   -12    -8  -175     6   .57   18   18 |    2024    -539     26    306
        |                    109   -34                       |
mit  281|    0     0     1     2   -19   -11  -.35   11    8 |    1242   -1369     31    207
        |                    -15    14                       |
ngs  225|    0     0     2    48  -101   -30  -.11    9    8 |    -160    -141   1784   3271
        |                     21    43                       |
sio  252|    2     3    -4   174   281     9  -.25   18   19 |     ---     ---    ---    ---
        |                    -94  -153                       |

Table 2.1646.4   GPS week: 1646   Day: 4   MJD: 55770.000                            

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  253|    0     0    -2   -33    -1    39  -.21    7    7 |    -142     384     17     73
        |                     23    16                       |
emr   95|   -2     0    -5  -103   -12    -6   .38   18   18 |    3144     728     19    128
        |                     67   -42                       |
esa  124|    1     0     0    -8    48     9   .24    7    7 |   -1527    1266     18    164
        |                     56     5                       |
gfz  197|    1     0     4   135   -47   -33  -.31   15   14 |    -359     454     27    137
        |                    -43    39                       |
grg  131|    0     0    11   -74    34    -9   .83   15   14 |    2107     804     48    211
        |                     70   -60                       |
igr  n/a|    0     0     1   -42    -8   -64  -.13    5    5 |    6584    1005     21     81
        |                     38    -5                       |
jpl  137|   -1     0   -12    26  -174     9   .55   18   18 |    1598     753     21    279
        |                    -17    -5                       |
mit  281|    0     0     3    11   -51   -22  -.36   12   10 |    -387    2722     22    203
        |                    -31    26                       |
ngs  225|   -1     0     2   -19   -65   -36  -.19    9    7 |     -86   -1704   2303   3230
        |                     31    -6                       |
sio  252|    1     4    -2   195   258     1  -.30   17   18 |     ---     ---    ---    ---
        |                    -99  -149                       |

Table 2.1646.5   GPS week: 1646   Day: 5   MJD: 55771.000                            

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  253|    0     0    -3   -41    18    16  -.22    8    7 |     306    -133     14     68
        |                     25   -30                       |
emr   95|   -1    -2    -7  -131     5   -16   .39   18   18 |    3508     170     20    130
        |                     94   -26                       |
esa  124|    2     0     0     6    84    17   .26    9    9 |   -1370    1416     20    161
        |                     44     1                       |
gfz  197|    0     1     4   132  -126     1  -.28   11   12 |      33     315     22    145
        |                    -37    -2                       |
grg  131|    0     1     9   -34    31   -15   .82   15   13 |    2539      37     48    230
        |                     36   -25                       |
igr  n/a|    0     0     1   -10    27   -66  -.08    5    5 |    7403      76     21    113
        |                      0   -16                       |
jpl  137|   -1    -1   -14    12  -172   -50   .60   19   19 |    2177      14     19    291
        |                    -16   178                       |
mit  281|    0    -2     1   -12   -60   -36  -.34   13   11 |    2867   -2437     19    188
        |                    -33    22                       |
ngs  225|    0     0     1   -28   -21    13  -.17   10    8 |     293    -147   1892   3520
        |                     47    13                       |
sio  252|    1     3    -1   150   241    22  -.28   19   18 |     ---     ---    ---    ---
        |                   -100  -145                       |

Table 2.1646.6   GPS week: 1646   Day: 6   MJD: 55772.000                            

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  253|    0     0    -2   -37     2    32  -.24    8    8 |    -302     120     15     81
        |                     48    10                       |
emr   95|   -1    -1    -6   -97     4    -8   .36   17   17 |    3193     407     18    118
        |                     60   -34                       |
esa  124|    1     0     1    -8    72    26   .22    8    8 |   -2028    1882     17    160
        |                     50   -17                       |
gfz  197|    0     0     2    28   -34   -55  -.27   10   11 |      -3    -285     23    117
        |                      3    22                       |
grg  131|    1     1     8   -21    56   -16   .74   15   14 |    1631     359     41    215
        |                     15   -29                       |
igr  n/a|    0     0     0   -27    11   -55  -.08    5    5 |    6726     416     20     97
        |                     38    11                       |
jpl  137|   -2     0   -11    -8  -206   -16   .50   18   18 |    1471     436     26    311
        |                    217   -48                       |
mit  281|    0    -2     4    14   -17   -53  -.31   14   12 |     905   -1012     25    201
        |                    -24     7                       |
ngs  225|    0     0     1    31   -74    16  -.17    9    7 |    -313      82   2054   4060
        |                    -34    82                       |
sio  252|    2     3    -1   171   252     9  -.32   22   22 |     ---     ---    ---    ---
        |                    -96  -140                       |

       
       
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 3.1646.0   GPS week: 1646   Day: 0   MJD: 55766.000                            

        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  |   47  ---   45  ---  ---  110  ---  ---  ---  ---   46 |    42  ---   32  ---  ---   77  ---  ---  ---  ---    35
   2  |    6   16    8   13    9    2   18   14    5   23    4 |    22   33   27   24   31   22   36   21   24   28    23
   3E |   13   20   10   14   20    7   18   24   20   13    6 |    35   38   38   36   48   37   47   47   46   41    38
   4  |    6   12    4    8   11    4   11    9    8   17    3 |    34   33   36   41   41   38   37   39   41   34    35
   5  |    6   15    6   11    9    7   22   11    8   30    4 |    20   24   21   22   27   19   30   22   24   28    20
   6E |   13   20    9   13   18    8   15   18   13   20    5 |    44   53   46   47   50   44   47   51   50   47    46
   7  |    5   19    5    9   19    5   17    8    5   12    3 |    17   28   19   18   25   15   28   19   18   17    17
   8  |    6   12    5    7   15    3    9   10    7   13    3 |    16   22   14   17   14   14   25   19   15   17    15
   9  |    8   15    8    8   11    5   12   19   11   21    4 |    15   24   18   15   19   13   25   19   12   21    14
  10  |    6   10    5   11   14    2    8   11   10   14    3 |    22   25   23   30   30   24   25   29   26   25    24
  11  |    6   13    4   10   12    4   18    8    7   13    3 |    39   50   44   45   59   42   52   38   43   34    43
  12  |    6   20   10   20   16    6   23   13    8   16    4 |    23   35   24   20   34   22   38   23   25   24    22
  13E |    6   16    6   12   15    4   20   11    9   23    4 |    24   34   28   24   38   23   38   22   27   23    25
  14E |    5   13    7   12   28    3   23   11    7   12    4 |    18   24   21   19   23   16   31   16   16   16    17
  15E |    7   26    7   11   13    6   20   13    9   11    4 |    18   34   22   18   28   16   32   19   21   16    19
  16  |    7   22    6   14   14    6   24   15    9   18    4 |    29   38   30   26   38   29   42   26   31   23    29
  17  |    6   15    5   13   20    3   14    9    5   17    3 |    27   29   22   28   25   24   31   27   23   30    23
  18  |    7   23    7   10   10    4   20   12    6   22    4 |    22   34   22   27   24   21   37   22   21   29    21
  19  |    6   20    7   11   16    4   17   11    5   12    3 |    24   34   24   27   38   24   34   22   26   24    25
  20  |    6   17    6   11   11    4   17   10    6   26    4 |    21   31   22   23   27   22   35   20   23   22    22
  21  |    6   18    6    7   12    3   20   11    9   27    4 |    18   28   23   20   27   21   28   20   24   23    20
  22  |    6   18    5    8   14    5   20   10    8   24    4 |    20   26   19   24   24   19   29   25   21   31    20
  23E |    7   23    6   16   12    4   19   11    9   14    4 |    21   35   23   20   25   19   35   18   21   21    21
  24  |    4   12    4   10   13    5   12    8    5   14    2 |    38   39   40   42   47   39   45   37   40   38    39
  25  |    7   15    8   10   19    4   25   17    6   18    4 |    21   32   28   28   38   26   45   27   26   28    25
  26E |   12   16   11   12   16    4   15   41   16   13    6 |    38   27   39   35   43   35   40   41   35   36    35
  27  |    8   15    8    7   11    5   13   21   11   22    4 |    16   24   19   15   21   14   26   19   15   20    15
  28  |    5   16    5    9   18    4   16    8    8   24    4 |    21   30   22   21   32   20   36   21   21   27    21
  29  |    5   24    6   12   21    4   21   13    8   20    4 |    19   30   19   24   23   21   27   25   25   27    20
 X30  |    8   19   12  ---  ---   10  ---   14  ---  ---    7 |    19   25   22  ---  ---   17  ---   17  ---  ---    18
  31  |    8   19    6   32   17    4   19   17    8   18    5 |    16   26   18   29   29   13   25   19   14   18    15
  32  |    6   14    3   11   12    5   12   10    6   16    3 |    19   23   22   20   26   19   30   17   21   26    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   18    7   13   15    5   18   15    9   19      |T   24   31   25   26   31   25   34   25   25   26    24
 WRMS |    6   18    7   13   13    5   17   10    6   17      |NE  21   28   22   21   26   22   31   21   20   23    20
 MEDI |    6   16    6   11   14    4   18   11    8   17      |MD  21   30   22   24   28   21   34   22   24   25    21

Table 3.1646.1   GPS week: 1646   Day: 1   MJD: 55767.000                            

        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  |   34  ---   31  ---  ---   56  ---  ---  ---  ---   32 |    74  ---   85  ---  ---   85  ---  ---  ---  ---    79
   2  |    6   19    9   19   12    5   23   13    7   24    4 |    21   33   28   31   29   24   36   27   24   26    25
   3E |   13   16    9   12   17    6   17   23   21   14    5 |    31   37   37   34   41   35   44   40   38   38    34
   4  |    6   12    6   10   10    4   12    8    9   19    3 |    24   24   28   32   27   26   24   30   26   24    25
   5  |    5   17    6   15   20    6   24   11   10   27    4 |    17   21   19   22   26   18   25   22   21   24    18
   6E |   15   21    9   14   20    8   19   23   19   21    6 |    30   38   31   32   39   29   38   31   37   30    30
   7  |    7   19    5   12   17    5   18    8    6   13    3 |    12   24   16   16   24   13   24   12   13   13    12
   8  |    7   14    5   10   10    4    9    7    6   12    3 |    12   17   15   18   15   12   19   17   14   14    13
   9  |    9   16    7   13   10    8   13   15    8   20    4 |    20   25   22   24   25   19   27   27   24   25    21
  10  |    5   14    7   13   11    6   10   10    5   13    3 |    19   20   21   24   21   20   17   26   20   23    20
  11  |    7   12    4   10   15    3   16    6    7   15    3 |    31   45   37   36   51   35   50   31   35   29    36
  12  |    8   21    7   19   20    3   24   10    9   15    4 |    16   33   24   24   33   20   32   21   18   19    19
  13E |    6   17    5   12   14    4   18   10    8   26    4 |    21   30   24   22   29   22   31   21   21   28    21
  14E |    7   12    7   11   16    5   21    9    9   14    3 |    22   25   26   24   28   21   29   20   23   19    22
  15E |    6   25    6   15   10    6   20   12   10   13    4 |    16   27   22   21   25   16   26   17   19   14    17
  16  |    8   22    6   15   16    5   21   13   12   19    4 |    27   35   31   25   33   28   38   25   26   25    27
  17  |   14   17    5   12   15    7   16    8    9   19    4 |    31   37   34   34   32   32   38   36   33   34    32
  18  |    6   20   10   14   11    4   23   12    8   22    4 |    18   29   21   27   22   18   31   16   16   22    17
  19  |    6   20    5   12   13    4   14   10    9   10    3 |    23   30   25   27   32   24   28   20   25   22    23
  20  |    8   15    8   15   12    5   14    7   10   26    4 |    14   25   24   23   21   18   28   14   19   16    18
  21  |    6   14    7   10   12    3   20    8    5   28    4 |    19   29   23   22   28   19   30   18   20   22    20
  22  |    5   17    9    9    9    5   18   11   10   23    4 |    18   24   21   23   21   18   24   22   19   29    18
  23E |    5   21    5   14   16    4   19    9    7   20    4 |    20   32   27   18   24   20   30   20   20   24    21
  24  |    5   10    4   10   13    5   10    6    8   15    3 |    31   35   36   34   37   34   38   29   33   33    33
  25  |    7   18    7   15   19    4   24   14    7   18    4 |    16   32   24   22   35   19   39   21   20   21    20
  26E |   12   17   10   14   27    8   14   38   13   15    6 |    43   29   41   43   52   42   46   61   47   45    44
 X27  |    9   14    6   14   12    8  ---   15   10   17    4 |    18   23   21   23   25   18  ---   25   23   22    20
  28  |    6   19    5   11   22    5   18    8    9   21    4 |    16   26   16   18   29   14   27   17   15   26    15
  29  |    8   23    7   15   15    4   21    9    8   25    4 |    28   32   27   27   27   26   31   26   25   26    26
 X30  |   13   20   18  ---  112   16  ---   15  ---  ---    9 |    17   29   35  --- 9999   28  ---   15  ---  ---    24
  31  |    6   16    7   13   19    5   15    9    7   17    4 |    17   27   21   28   28   17   26   18   17   18    18
  32  |    7   14    5   13   13    5   10    9    8   14    3 |    17   21   24   19   22   18   25   17   19   21    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   18    7   13   16    5   18   13   10   19      |T   23   28   27   25   29   24   31   23   23   24    24
 WRMS |    7   18    7   12   14    5   17   10    7   17      |NE  21   26   27   22   26   23   28   19   19   21    23
 MEDI |    7   17    7   13   15    5   18   10    8   18      |MD  19   29   24   24   28   20   30   21   21   24    21

Table 3.1646.2   GPS week: 1646   Day: 2   MJD: 55768.000                            

        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  |   34  ---   40  ---  ---   78  ---   28  ---  ---   24 |    32  ---   44  ---  ---   60  ---  730  ---  ---    34
   2  |    7   19    8   13   11    3   21    7    6   26    4 |    16   26   22   27   19   20   30   18   19   19    18
   3E |   12   18    9    8   18    6   16   21   19   15    5 |    26   33   32   24   37   28   36   32   37   29    29
   4  |    6   12    6    8    9    4   12    6    8   21    3 |    30   27   30   35   32   31   31   34   32   28    31
   5  |    5   17    7   10   12    4   18   11    8   26    4 |    20   23   21   24   23   20   27   22   22   27    20
   6E |   14   21    8   11   20    7   19   21   18   21    5 |    20   28   23   29   31   21   30   31   27   27    21
   7  |    5   19    6    7   20    3   17    8    8   13    3 |    14   30   19   19   26   16   27   16   18   16    17
   8  |    5   12    5    8   17    3    8    7    9   13    3 |    18   22   19   22   21   19   23   23   19   19    19
   9  |    9   17   13    9    7    5   12   13   10   20    4 |    15   24   26   22   23   17   23   23   17   24    19
  10  |    4   12    7   13   14    4    9    7    9   16    3 |    24   21   21   29   28   23   23   28   23   25    24
  11  |    7   15    5    8   21    4   20    7   10   15    3 |    35   44   38   32   53   38   47   31   39   29    36
  12  |    7   20    9   21   19    4   27    8   10   16    5 |    20   31   24   26   30   19   35   23   24   22    21
  13E |    6   18    5   10   19    4   22    9   10   36    4 |    22   29   25   19   31   25   33   22   26   35    24
  14E |    6   14    8    9   15    7   22    8   10   12    3 |    19   25   21   25   23   21   27   21   21   17    19
  15E |    5   26    7    9   13    6   20   13    8   11    4 |    15   28   21   22   23   18   29   19   18   17    17
  16  |    7   23    5   13   17    6   23   12   11   22    4 |    23   33   25   22   30   23   33   23   29   21    23
  17E |   10   16    5   10   17    7   15    7    5   17    3 |    31   36   29   31   32   28   31   31   33   31    30
  18  |    7   20    8   12   13    4   23    8   10   22    4 |    21   29   24   27   23   21   32   21   22   26    21
  19  |    6   20    7    8   13    4   22    9    9   11    3 |    26   33   26   21   29   26   32   23   27   23    25
  20  |    5   15    9   11   13    3   16    8    9   24    3 |    22   31   24   24   26   23   32   21   23   20    23
  21  |    6   18    6    8   14    3   22    8    7   29    4 |    19   29   23   21   27   19   31   17   21   24    20
  22  |    6   17    8    8   12    5   22    9   10   23    4 |    22   25   24   27   23   22   28   25   22   31    22
  23E |    4   26    6   13   21    3   17    8   10   17    4 |    17   32   22   20   22   19   28   19   20   18    19
  24  |    4   12    4   10   13    4   11    5    9   15    3 |    32   33   33   28   38   33   34   29   35   32    32
  25  |    7   17    8   26   19    5   29   15    9   19    5 |    18   30   24   34   33   19   43   22   20   22    21
  26E |   13   14   11   10   27    6   16   28   16   17    6 |    28   29   31   37   32   30   29   49   39   35    31
  27  |    9   19   13    8   11    6   14   13   13   19    4 |    16   26   26   23   23   18   23   25   19   26    19
  28  |    6   18    4    8   20    3   18    8    7   20    3 |    25   29   24   21   30   24   32   25   26   29    24
  29E |    7   27    8   10   22    5   23    8    6   15    4 |    27   37   30   37   30   28   34   29   28   30    28
 X30  |   13   23   13  ---  ---   20  ---    8  ---  ---    8 |    23   31   25  ---  ---   25  ---   16  ---  ---    21
  31  |    8   17    9   11   21    5   16   14    7   21    4 |    22   29   23   21   31   19   28   22   23   21    21
  32  |    6   14    7   10   12    5   15    6    9   18    3 |    18   25   22   22   24   20   28   18   20   21    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   18    8   11   17    5   19   12   10   20      |T   22   29   25   25   28   24   30   46   24   24    23
 WRMS |    7   18    8   11   16    5   18    9    8   19      |NE  20   27   24   24   26   22   29   72   21   23    21
 MEDI |    6   18    7   10   15    4   18    8    9   18      |MD  22   29   24   24   28   21   30   23   23   24    21

Table 3.1646.3   GPS week: 1646   Day: 3   MJD: 55769.000                            

        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  |   36  ---   42  ---  ---   34  ---   25  ---  ---   25 |    93  ---  122  ---  ---  112  ---  707  ---  ---   104
   2  |    7   19   10   14   12    4   23    7    8   23    4 |    23   30   23   26   26   22   36   22   27   23    21
   3E |   12   17   10   11   19    7   18   21   15   17    5 |    29   34   32   29   36   32   38   39   38   36    31
   4  |    5   14   10    9   16    5   14    4    7   20    3 |    37   34   34   41   39   37   33   36   36   32    35
   5  |    6   18    9   15   16    4   22    9   10   26    4 |    19   26   16   22   25   21   30   22   22   29    19
   6E |   15   25   12   14   17    7   18   21   15   22    6 |    39   47   47   42   44   39   55   44   50   48    42
   7  |    8   18    7   10   16    7   16    6    6   16    3 |    19   30   23   19   28   21   31   20   21   21    19
   8  |    7   14    9   11   20    4    9    8    6   13    3 |    19   26   20   19   21   20   26   21   20   19    18
   9  |    9   12    9   10   11    4   13   12    9   15    3 |    19   21   16   18   21   17   28   22   23   22    18
  10  |    4   13    9   10   20    4   12    8    8   15    3 |    24   26   21   26   28   25   25   29   26   26    24
  11  |    7   15    6   13   19    4   20    7    7   15    4 |    34   48   44   45   55   40   50   35   41   33    39
  12  |    7   19   12   20   20    4   24    8    9   13    4 |    22   34   25   21   34   23   39   23   28   23    23
  13E |    5   18    6   10   19    5   20    9    9   16    4 |    26   35   30   25   37   29   40   23   30   24    27
  14E |    7   14    9   13   23    4   18    7    7   11    4 |    21   24   23   22   29   21   31   22   23   21    20
  15E |    7   31    8   10   15    7   22   11    5   10    4 |    19   32   20   17   29   17   31   19   21   18    19
  16  |    7   21    9   12   15    6   22   12   10   20    4 |    27   34   24   22   27   24   36   24   25   25    24
  17E |    5   25    8   11   16    7   16    6    9   18    4 |    27   40   27   27   27   27   34   31   25   30    26
  18  |    7   21    9   14   15    4   20    9    8   22    4 |    22   30   20   26   28   22   33   22   22   28    21
  19  |    5   21    6   14   18    4   16    9    7   12    4 |    22   33   24   31   33   23   28   19   27   23    23
  20  |    7   17    7   13   11    6   18    7    7   23    4 |    22   28   21   25   26   22   33   20   22   17    21
  21  |    7   17    6   11   15    5   20    9    7   28    4 |    22   30   21   19   30   21   30   19   20   24    20
  22  |    7   18    8    9   15    4   17    7    7   24    4 |    23   26   19   25   26   23   27   25   25   33    21
  23E |    5   23    7   16   17    5   20    8    8   19    4 |    23   32   25   19   27   24   36   19   25   23    22
  24  |    4   11    5   11   16    6   13    6    8   16    3 |    36   37   39   41   42   37   38   34   35   36    36
  25  |    7   18    9   27   15    7   25   13    9   16    5 |    23   35   25   38   34   26   44   24   31   27    26
  26E |   14   16   10   16   22    6   20   25   15   16    6 |    58   41   56   57   63   56   61   66   60   58    57
  27  |   10   16    8    8   14    4   12   13    9   16    4 |    19   25   16   18   23   17   27   21   20   22    17
  28  |    7   20    9   11   20    7   19   10    9   21    4 |    23   34   19   23   28   24   34   24   29   30    22
  29E |    8   25   14   17   16    6   21   12   11   12    5 |    33   39   33   33   34   31   35   33   34   32    32
 X30  |   12   29   22  --- >>>>   15  ---    9  ---  ---   10 |    20   30   29  --- 9999   22  ---   16  ---  ---    17
  31  |    7   17    6   26   15    4   15   11    8   19    4 |    17   28   19   35   27   16   26   16   14   16    16
  32  |    5   13    5   12   13    8   14    6    5   16    3 |    19   22   20   24   25   19   29   17   20   19    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    9   14   17    5   18   11    9   18      |T   27   31   29   27   31   28   34   47   28   27    27
 WRMS |    7   19    9   12   16    5   18    8    8   19      |NE  26   28   28   23   27   27   31   70   22   24    25
 MEDI |    7   18    9   12   16    5   18    9    8   16      |MD  23   32   23   25   28   23   33   22   25   24    22

Table 3.1646.4   GPS week: 1646   Day: 4   MJD: 55770.000                            

        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  |   35  ---   37  ---  ---   29  ---   29  ---  ---   24 |    82  ---  103  ---  ---   95  ---  720  ---  ---    90
   2  |    5   18    8   16   11    4   22    9   10   24    4 |    17   25   19   19   22   15   25   18   20   19    16
   3E |   13   16    9   11   15    6   19   23   19   14    5 |    26   33   31   26   36   29   38   39   36   32    29
   4  |    7   12    6   13   13    3   15    7   10   20    3 |    26   28   31   33   33   28   24   30   32   26    27
   5  |    6   19    8   16   15    4   22   12   10   31    5 |    17   25   20   23   23   17   29   20   21   28    17
  X6E |   13   22    9   13   15    7  ---   23   17  ---    6 |    26   37   28   33   28   29  ---   37   33  ---    28
   7  |    6   17    7   10   13    5   17    6    7   15    3 |    19   29   22   16   26   15   31   19   19   20    19
   8  |    6   14    6   10   22    4   10    7    7   12    3 |    21   26   22   19   23   19   30   23   21   21    21
   9  |    8   13    6    9   15    5   14   12    7   11    3 |    16   23   19   15   22   16   26   21   19   17    16
  10  |    6   10    6   12   13    5   11    9    8   15    3 |    20   22   22   26   26   20   22   27   24   24    20
  11  |    7   13    3   14   17    6   18    8    4   12    3 |    31   43   36   38   57   34   44   33   34   29    34
  12  |    7   21    9   26   15    6   26   10    8   14    5 |    21   36   23   20   29   19   35   25   23   21    21
  13E |    5   17    6   15   17    5   19   10    7   14    4 |    22   32   26   17   36   22   31   20   28   21    24
  14E |    7   17    8   15   20    5   18   10    8    9    4 |    19   27   25   21   23   20   29   19   25   19    20
  15E |    7   27    8   11   17    5   20   13    9   11    4 |    16   29   24   14   28   15   29   16   21   16    17
  16  |    8   21    8   20   13    9   22   12    9   19    4 |    24   35   29   21   32   24   39   24   27   21    25
  17E |    5   13    5   11   17    4   20   12   11   17    4 |    23   25   20   23   25   24   30   27   25   27    23
  18  |    6   20    7   15   13    6   18   11   10   22    4 |    19   28   20   25   24   19   33   20   20   26    18
  19E |    8   23    8   16   20    4   19   10    8    9    4 |    41   48   42   47   48   42   44   38   45   41    41
  20  |    5   15    6   17   11    4   17    8    5   21    3 |    17   26   21   24   28   18   28   19   19   20    19
  21  |    6   19    7   12   15    6   21   12    8   27    4 |    15   31   23   16   30   17   29   20   18   22    18
  22  |    5   18    6   15   12    6   17   10   11   23    4 |    18   23   18   25   22   21   25   26   22   33    18
  23E |    6   20    5   19   16    4   19    9   10   13    4 |    22   32   28   21   31   24   31   23   29   23    25
  24  |    6   12    5   12   14    6   13    8    7   12    3 |    30   35   32   35   40   32   37   29   33   30    31
  25  |    6   15    6   22   11    5   22   19   11   15    4 |    20   32   24   26   31   24   41   26   26   25    23
  26E |   11   17   10   12   21    6   14   23   15   18    5 |    17   32   20   19   23   14   23   25   21   20    13
  27  |    9   17    6    7   15    5   14   12   11   10    3 |    19   28   22   14   23   18   28   22   25   19    19
  28  |    6   19    5    6   17    6   19   13    8   22    4 |    20   30   19   19   25   20   31   24   21   27    19
  29E |    7   23    6   19   12    6   22   14    9   13    4 |    18   32   21   27   19   18   26   26   21   27    19
 X30  |   15   23   21  ---  ---   17  ---    9  ---  ---   10 |    17   23   33  ---  ---   21  ---   17  ---  ---    17
  31  |    6   18    7   20   13    5   22   15    9   17    4 |    16   27   21   21   24   15   27   18   18   17    16
  32  |    6   13    6   16   15    3   11    8    8   13    3 |    13   21   20   17   26   14   24   14   18   21    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   18    7   15   15    5   18   12    9   17      |T   22   29   27   23   28   23   30   45   24   23    23
 WRMS |    7   18    7   14   14    5   18   10    7   18      |NE  23   28   28   20   25   24   31   71   21   22    24
 MEDI |    6   17    6   14   15    5   19   10    9   15      |MD  19   29   22   21   26   20   29   23   22   22    19

Table 3.1646.5   GPS week: 1646   Day: 5   MJD: 55771.000                            

        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  |   23  ---   27  ---  ---   35  ---   22  ---  ---   17 |    72  ---   84  ---  ---   80  ---  712  ---  ---    74
   2  |    6   19   10    9   13    7   22   10    8   25    4 |    15   27   23   24   23   16   26   17   18   17    16
   3E |    9   18    9    8   18    6   17   21   16   16    5 |    28   34   30   28   38   30   37   37   35   30    29
   4  |    5   13    7    7   13    5   11    9    9   24    3 |    32   33   34   39   38   34   31   39   35   34    33
   5  |    6   17   11   12   11    4   19   12   10   35    5 |    17   23   20   18   19   15   24   20   16   30    15
   6E |   11   19    8   11   23    5   17   21   13   21    5 |    40   49   48   46   52   43   50   49   44   42    44
   7  |    5   19   11   10   12    5   19    8    8   14    3 |    11   25   22   18   26   14   30   14   11   13    13
   8  |    6   15    9   10   12    6   10    9    9   10    3 |    12   21   17   17   15   14   20   18   15   16    13
   9  |   10   13   11    7   14    5   14   13    9   13    4 |    16   21   20   18   24   14   28   18   18   17    15
  10  |    4   10    7   10   13    4   12    8    9   16    3 |    21   22   23   23   23   20   19   28   22   25    21
  11  |    7   14    5   11   15    4   18   10    7   13    3 |    32   42   36   33   53   32   43   30   33   27    33
  12  |    6   21   13   16   16    5   25    8    7   15    4 |    16   33   22   20   28   16   31   21   18   20    17
  13E |    5   17   11   13   11    5   19    9    7   11    3 |    16   24   20   16   30   15   32   14   14   15    16
  14E |    9   15   11    9   19    5   20   11   11    9    4 |    21   27   30   20   27   21   31   22   24   21    21
  15E |    5   29   11   10   16    5   23   14   11   12    4 |    20   27   23   20   31   17   30   20   18   20    18
  16  |    7   20   10   15   13    9   21   14   12   19    4 |    23   30   24   16   26   20   32   22   23   19    20
  17E |    7   17    6    8   11    6   18   15   10   24    4 |    19   21   17   23   18   19   22   23   22   28    18
  18  |    5   19    9   11   14    4   25   11    9   22    4 |    21   27   20   21   23   19   43   19   19   26    18
  19E |    6   18   10   14   13    6   21   12    7   22    4 |    25   31   28   30   33   27   34   25   30   27    26
  20  |    5   16   10   14   11    5   18    9    9   23    4 |    16   23   23   21   22   17   26   17   20   18    17
  21  |    7   21    7    9   15    4   24   14   11   27    5 |    20   33   23   18   31   20   40   23   22   28    20
  22  |    7   15    7    7   10    4   17   11   10   27    4 |    17   21   18   21   19   16   29   22   21   32    16
  23E |    6   22    7   15   16    5   18    9    8   12    4 |    24   33   29   25   28   27   34   25   31   28    26
  24  |    6   16    5   12   14    5   13    8    9   16    3 |    36   35   36   39   40   35   35   34   38   35    35
  25  |    9   14   12   22   14    6   25   16   10   18    5 |    17   29   24   32   28   22   43   21   20   24    20
  26E |   16   17    8    8   22    8   18   22   20   19    5 |    44   41   43   46   51   42   46   48   46   45    43
  27  |   11   15   10    6   13    6   12   13    8   14    4 |    16   23   21   19   24   16   26   20   21   22    17
  28  |    7   20    7    8   14    6   22   15    8   21    4 |    16   29   18   17   26   15   33   21   18   27    16
  29E |   10   22    9   15   19    6   24   19    9   18    5 |    21   30   25   23   22   21   30   27   23   28    21
 X30  |   10   28   13  ---  ---   14  ---   13  ---  ---    8 |    19   30   23  ---  ---   16  ---   15  ---  ---    16
  31  |    5   19   11   12   16    5   19   10   14   19    4 |    16   26   22   18   27   17   28   17   29   16    16
  32  |    8   13    7   12   10    5   17   12   10   14    3 |    14   20   22   17   23   17   25   18   20   22    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   18    9   11   15    5   19   13   10   19      |T   22   28   27   24   28   23   31   45   24   25    23
 WRMS |    7   18    9   12   13    5   19   11    8   18      |NE  20   26   25   19   24   21   31   68   19   21    20
 MEDI |    7   17    9   10   14    5   18   12    9   18      |MD  19   27   23   21   26   19   31   21   21   25    18

Table 3.1646.6   GPS week: 1646   Day: 6   MJD: 55772.000                            

        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  |   28  ---   26  ---  ---   25  ---   26  ---  ---   19 |    96  ---  106  ---  ---  101  ---  741  ---  ---    96
   2M |    7   15    7    8   12    5   22    9    7   25    4 |    19   25   25   26   25   22   32   26   21   25    21
   3E |   10   16   12   10   14    9   17   25   22   15    5 |    34   37   34   29   38   33   47   37   37   36    32
   4M |    9    9    7    7   13    6   13   11    8   27    3 |    40   41   40   47   46   42   36   48   43   41    41
   5  |    9   15    7   12   10    5   21   10    6   38    4 |    21   23   23   27   24   22   30   24   24   37    21
   6E |   11   21   10   12   17    6   17   25   16   24    5 |    43   52   46   50   50   45   45   52   50   44    46
   7  |    7   19    6    9   14    4   17   11    9   16    4 |    19   29   23   21   27   20   33   21   20   21    20
   8  |    7   12    8   11   15    4   10   11    7   16    3 |    22   27   23   25   24   23   35   24   22   21    23
   9  |    9   14    6    7   15    4   13   15    9   16    3 |    23   28   24   26   28   24   39   30   23   26    24
  10M |    7   11    9    9   15    3    8   10    7   21    3 |    23   28   25   32   32   25   30   33   28   32    26
  11M |    6   14    5   12   15    4   16   16    8   18    4 |    46   57   49   55   66   49   58   46   49   44    50
  12  |    8   20    9   17   18    5   26   11    8   17    5 |    27   40   28   25   31   26   47   29   28   27    27
  13E |    7   18    7   12   22    6   18   12   10   29    4 |    21   30   23   18   32   20   35   18   24   32    21
  14E |    8   17   10    8   19    3   17    9    9    9    4 |    30   34   30   29   30   28   37   30   31   29    28
  15E |    8   32   11    8   12    4   21   16    9   12    5 |    24   37   28   24   31   23   34   21   24   24    24
  16  |    9   18    8   11   13    4   21   13   11   20    4 |    33   37   32   24   32   29   43   27   29   29    29
  17E |    8   14    7    9   14    6   14   16    7   27    4 |    31   35   29   30   29   30   38   36   28   40    30
  18  |    6   18    8   11   10    4   22   11    6   22    4 |    26   32   25   27   25   24   40   26   26   30    24
  19E |    5   20    8   16   13    5   15   13   11   20    4 |    35   38   37   39   38   36   40   36   37   37    35
  20M |    7   17   10   10   14    5   13    9    8   28    4 |    27   34   28   28   32   27   36   29   29   40    28
  21  |    7   20    6    8   12    6   25   19    8   28    4 |    21   35   22   21   35   22   33   23   23   29    22
  22  |    7   16    8    7   12    2   19   13    6   28    4 |    21   25   21   24   23   21   33   27   21   34    20
  23E |    7   20    7   15   19    4   15   12    8   13    4 |    29   37   31   22   31   28   38   27   32   30    28
  24M |   10   11    4   10   13    5   10   17    6   19    3 |    35   39   39   41   45   37   37   38   37   32    37
  25  |    7   17    8    6   16    3   24   16    8   21    4 |    24   34   30   28   34   26   47   24   28   28    26
 X26E |   15  ---   10   10   16    5   15   20   12   23    5 |    46  ---   41   46   43   41   43   53   46   44    43
  27  |    9   17    7    9   13    5   12   12    7   13    3 |    20   27   22   21   26   20   34   22   21   20    20
  28M |    8   21    8    8   14    5   19   14    7   23    4 |    25   36   24   24   29   23   41   27   23   33    24
  29E |    8   21   10   11   24    6   23   17    6   22    5 |    21   31   21   22   24   19   31   27   24   34    21
 X30  |   14   30   14  ---  ---   20  ---   16  ---  ---   10 |    20   31   24  ---  ---   13  ---   14  ---  ---    16
  31  |    9   16    9   12   15    6   17    9   13   16    4 |    19   25   21   23   26   19   27   18   23   20    18
  32M |    9   15    6   11   12    5   11   10    7   22    3 |    16   21   19   14   23   15   24   17   18   26    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   17    8   10   15    5   18   14    9   22      |T   29   33   31   28   32   29   37   51   28   31    29
 WRMS |    8   17    8   10   14    5   18   12    7   22      |NE  28   30   30   24   27   27   36   75   24   26    27
 MEDI |    8   17    8   10   14    5   17   13    8   21      |MD  24   34   25   26   31   24   36   27   26   30    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 4.1646   GPS week: 1646   MJD: 55766.0-55772.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3062 |U    8    10    23 |U    5     7    23 |U   12    10    30 |
emr | emr 2948 |U   12    10    25 |U    9    12    32 |    12    15    37 |
esa | esa 3072 |     8    10    22 |U    5     6    21 |     8    11    25 |
gfz | gfz 2866 |U   14    11    31 |U    5     7    21 |U    9     9    30 |
grg | grg 2879 |    15    12    32 |U    5     7    22 |     9    10    23 |
igr | igr 3017 |     8    10    21 |     5     7    22 |    13    12    46 |
igs | igs 3045 |     9    10    21 |     4     7    21 |    12    10    29 |
jpl | jpl 2838 |    15    12    31 |U    6    14    29 |U   13    13    43 |
mit | mit 3044 |U    9    10    22 |U    8    18    33 |U   21    16    48 |



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 5.1646.0   GPS week: 1646   Day: 0   MJD: 55766.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3064 |     9    14    23 |     5     7    19 |  ----  ----  ---- |
emr | emr 2963 |    11    12    24 |     7    12    31 |  ----  ----  ---- |
esa | esa 3072 |    10    14    22 |     4     5    19 |     3     6    21 |
gfz | gfz 2868 |    18    14    37 |     4     5    17 |  ----  ----  ---- |
grg | grg 2880 |    19    14    35 |     5     7    21 |  ----  ----  ---- |
igr | igr 2974 |     9    13    23 |     5     5    19 |    30    23   154 |
igs | igs 3029 |    12    13    23 |     4     5    19 |  ----  ----  ---- |
jpl | jpl 2858 |    18    15    35 |     6    13    28 |    26    19    97 |
mit | mit 2976 |     8    11    22 |     7    19    34 |    31    23   153 |

Table 5.1646.1   GPS week: 1646   Day: 1   MJD: 55767.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3069 |     8     9    23 |     5     6    29 |    13    11    42 |
emr | emr 2963 |    11    11    22 |    10    16    36 |    11    10    39 |
esa | esa 3072 |     9    10    24 |     5     5    27 |     9    14    35 |
gfz | gfz 2869 |    14    11    32 |     5     5    29 |     6    10    36 |
grg | grg 2880 |    16    10    37 |     7     9    31 |     7    11    21 |
igr | igr 2955 |     9    11    25 |     6     6    29 |     8    11    33 |
igs | igs 3058 |     9     9    22 |     5     5    27 |    14     9    38 |
jpl | jpl 2772 |    13    13    27 |     7    15    43 |    10    11    35 |
mit | mit 2976 |     8    11    23 |     9    21    43 |    25    24    35 |

Table 5.1646.2   GPS week: 1646   Day: 2   MJD: 55768.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3045 |     7     7    19 |     6     7    27 |     8     9    16 |
emr | emr 2961 |     9     7    19 |     9    13    36 |    10    12    22 |
esa | esa 3072 |     7     8    18 |     5     7    25 |     8     8    17 |
gfz | gfz 2869 |    14     9    31 |     5     9    26 |     7     8    18 |
grg | grg 2880 |    11    10    24 |     6     6    28 |     8     8    21 |
igr | igr 3035 |     7     7    18 |     6     8    25 |     7     9    19 |
igs | igs 3046 |     7     7    16 |     5     7    27 |     7     8    17 |
jpl | jpl 2868 |    12     9    26 |     8    22    33 |     8     9    22 |
mit | mit 3072 |    11     9    17 |     8    19    32 |     8     9    23 |

Table 5.1646.3   GPS week: 1646   Day: 3   MJD: 55769.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3062 |     8     9    21 |     5    10    21 |     9     6    19 |
emr | emr 2961 |    24    10    30 |    10    12    27 |     9     6    14 |
esa | esa 3072 |     7     9    20 |     4     8    19 |     8     5    16 |
gfz | gfz 2869 |    16    10    26 |     5     8    21 |     8     5    15 |
grg | grg 2880 |    16    11    28 |     5     7    20 |     9     6    18 |
igr | igr 3051 |     8     8    19 |     5     8    19 |     8     5    15 |
igs | igs 3040 |     8     9    21 |     4     9    19 |     8     6    17 |
jpl | jpl 2863 |    16    13    30 |     6    14    21 |     9     5    19 |
mit | mit 3072 |     8     8    20 |     7    16    26 |     9     5    20 |

Table 5.1646.4   GPS week: 1646   Day: 4   MJD: 55770.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3066 |    10    12    30 |     5     8    24 |     8    10    23 |
emr | emr 2962 |    12    11    28 |    10    11    40 |    11    12    27 |
esa | esa 3072 |     9    10    27 |     5     7    19 |     8     9    20 |
gfz | gfz 2853 |    14    14    30 |     5     9    16 |     7     7    24 |
grg | grg 2879 |    14    15    28 |     5     7    19 |     8     9    24 |
igr | igr 3060 |     8     9    24 |     6     9    22 |     8     9    20 |
igs | igs 3043 |     9     9    27 |     5     8    19 |     8    10    21 |
jpl | jpl 2776 |    16    14    27 |     8    14    28 |     9    10    31 |
mit | mit 3072 |    13    11    32 |     9    17    31 |    11    12    32 |

Table 5.1646.5   GPS week: 1646   Day: 5   MJD: 55771.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3069 |     8     9    19 |     4     6    20 |    11     8    29 |
emr | emr 2956 |     8    10    22 |     8     7    26 |    14    10    34 |
esa | esa 3072 |     8    10    19 |     5     5    17 |    11     7    29 |
gfz | gfz 2868 |    13     9    30 |     4     5    17 |    12     9    28 |
grg | grg 2879 |    15    11    35 |     5     6    17 |    12     8    26 |
igr | igr 3000 |     8     8    17 |     5     6    18 |    11     7    31 |
igs | igs 3045 |     8     9    17 |     3     5    15 |    11     8    28 |
jpl | jpl 2862 |    14    11    37 |     5    11    25 |    13     9    35 |
mit | mit 3072 |     7     7    17 |     7    15    31 |    11     8    31 |

Table 5.1646.6   GPS week: 1646   Day: 6   MJD: 55772.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3064 |     9    11    23 |     5     7    20 |    25    18    52 |
emr | emr 2872 |     9    10    32 |    10     9    27 |    15    43    86 |
esa | esa 3072 |     9    13    25 |     4     7    20 |     8    29    36 |
gfz | gfz 2869 |    11    12    32 |     4     7    19 |    16    17    61 |
grg | grg 2880 |    13    13    35 |     4     7    19 |    12    19    27 |
igr | igr 3050 |     9    12    22 |     4     7    19 |    17    19    50 |
igs | igs 3059 |     9    11    24 |     4     7    18 |    20    19    52 |
jpl | jpl 2868 |    12    10    35 |     5    10    27 |    15    31    63 |
mit | mit 3072 |     8    11    23 |     7    18    33 |    51    35    41 |


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 6.1646   GPS week: 1646   MJD: 55766.500-55772.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       0     -36     -33     -65     -1 |       3     16
            |      24      23      92     102      7 |       2
emr   uuuuu |      43     -38      39     153      3 |      27     31
            |      15      26      88      19      5 |       2
esa   uuuuu |       3     -39      92      -2     -2 |      11     18
            |      12       8      60      50      4 |       3
gfz   uuuuu |     -34      24     -94      16     -1 |      -5     17
            |      24      23      81      79      5 |       4
grg   uuuux |      36      -3     -31    -236     56 |      -7     54
            |      51      35     137      80     41 |      31
igr   xxxxx |     -17     -31       5       2     -6 |       0     17
            |      22      22      66      92      5 |       5
irf   xxxxx |      -9       0     -54     -13      1 |       1     14
            |      12      14      64      45      2 |       3
jpl   uxuuu |     -28     -40      79     -28      0 |      25     30
            |      76      99      78     129      7 |       2
mit   uuuuu |     -35      14    -208    -106     -1 |      18     22
            |      22      30      88      64      3 |       3
ngs   uuuuu |     -27      14      -7      59      0 |      11     15
            |      34      37     109      72      7 |       2
sio   uuuuu |     131      86     190     164      9 |      29     33
            |      20      29     113      46      4 |       1


Table 7.1646.0   GPS week: 1646   Day: 0   MJD: 55766.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -22     -36    -128     -13     -3 |       4     13
emr   uuuuu |      61      -3     -38     163     10 |      26     30
esa   uuuuu |       4     -41      98       2     -1 |      13     18
gfz   uuuuu |     -26      10     -38      -5     -7 |       1     15
grg   uuuux |     -51     -23     161    -304     88 |     -59    115
igr   xxxxx |     -14     -32      13      30     -7 |       6     16
irf   xxxxx |     -20      -6    -118     -12     -1 |       4     13
jpl   uxuuu |      19      67     149      85    -12 |      29     33
mit   uuuuu |     -57      -3    -320     -93     -3 |      21     24
ngs   uuuuu |      -4      39     -74      20      9 |      13     17
sio   uuuuu |     110      72      69     185     10 |      29     32

Table 7.1646.1   GPS week: 1646   Day: 1   MJD: 55767.500

                                                         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 |      -4     -56       1    -222     11 |       2     14
emr   uuuuu |      60     -20     -59     154      4 |      27     31
esa   uuuuu |      -7     -36     117     -40      2 |      11     18
gfz   uuuuu |     -73      20     -90    -110      0 |      -3     17
grg   uuuux |      91      24     -40     -91     23 |     -34     85
igr   xxxxx |     -44     -46     -43     -63     -6 |       2     17
irf   xxxxx |     -28     -11     -71     -84      3 |       1     14
jpl   uxuuu |     -36     -85     141     120     -2 |      25     31
mit   uuuuu |     -69     -11    -222    -170     -1 |      19     24
ngs   uuuuu |      12      20     -33     113     -6 |      11     16
sio   uuuuu |      97      68     187     137     16 |      28     30

Table 7.1646.2   GPS week: 1646   Day: 2   MJD: 55768.500

                                                         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     -25      76     -68      3 |       5     17
emr   uuuuu |      56     -23     -38     166      2 |      30     34
esa   uuuuu |      17     -51     184     -76      1 |      13     20
gfz   uuuuu |     -32       8     -75     -45     -5 |      -2     18
grg   uuuux |      99      53    -163    -285     14 |     -13     56
igr   xxxxx |     -42     -48     -59    -137      2 |       3     17
irf   xxxxx |       3     -23      43     -13      0 |       3     15
jpl   uxuuu |     -73     -10     -82     -35      8 |      25     31
mit   uuuuu |     -32     -30     -69     -59     -3 |      21     26
ngs   uuuuu |     -51      67    -132     180     -1 |      12     17
sio   uuuuu |     139      35     357     221     12 |      30     35

Table 7.1646.3   GPS week: 1646   Day: 3   MJD: 55769.500

                                                         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 |       6     -71       0       1     -6 |       4     16
emr   uuuuu |      37     -31     135     165     -6 |      29     32
esa   uuuuu |       6     -30      31      61     -9 |      13     19
gfz   uuuuu |     -36      15      19      21     -2 |      -5     15
grg   uuuux |      12      14     -19    -318     25 |       4     18
igr   xxxxx |     -19     -48     102     -37     -9 |       1     16
irf   xxxxx |      -5       3      23      10     -3 |       2     14
jpl   uxuuu |      29    -106      76    -216      2 |      25     31
mit   uuuuu |     -19      18    -131     -45     -6 |      19     23
ngs   uuuuu |     -48     -18    -118      30     10 |      11     16
sio   uuuuu |     148      97     334     188      7 |      30     35

Table 7.1646.4   GPS week: 1646   Day: 4   MJD: 55770.500

                                                         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      -5    -185     -10      2 |       1     16
emr   uuuuu |      29     -49      55     113      5 |      25     29
esa   uuuuu |     -18     -38      12      -4      2 |       9     18
gfz   uuuuu |     -52      61    -168     119      1 |      -8     16
grg   uuuux |      47     -52      92    -216    104 |       6     18
igr   xxxxx |      -8     -20      48       9     -8 |      -3     16
irf   xxxxx |     -13      18    -117      66      1 |      -1     14
jpl   uxuuu |      -8      35     120    -184      4 |      22     28
mit   uuuuu |     -39      49    -298     -31     -2 |      15     20
ngs   uuuuu |      -7     -13     142      -2     -5 |      10     15
sio   uuuuu |     136     117      93     203      7 |      28     32

Table 7.1646.5   GPS week: 1646   Day: 5   MJD: 55771.500

                                                         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     -12     -32    -187    -10 |       2     16
emr   uuuuu |      29     -81     161     143     -1 |      26     29
esa   uuuuu |       2     -31      71     -17     -6 |       9     18
gfz   uuuuu |       5      50    -225      93      1 |      -9     17
grg   uuuux |      28     -23     -12    -257    105 |      19     36
igr   xxxxx |      19      13     -76     146    -11 |      -4     16
irf   xxxxx |       3      13     -76     -36      1 |      -1     14
jpl   uxuuu |    -175      29      88      43      6 |      25     29
mit   uuuuu |     -19      46    -196    -188      1 |      15     20
ngs   uuuuu |     -10     -34      96      92      0 |      11     14
sio   uuuuu |     148     113     143     107      7 |      29     33

Table 7.1646.6   GPS week: 1646   Day: 6   MJD: 55772.500

                                                         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     -44      34      46     -4 |      -1     16
emr   uuuuu |      33     -56      58     165      3 |      25     28
esa   uuuuu |      16     -46     131      58     -3 |       6     15
gfz   uuuuu |     -23       1     -83      41      9 |     -12     17
grg   uuuux |      28     -11    -239    -184     34 |      28     51
igr   xxxxx |     -12     -34      51      68      0 |      -8     17
irf   xxxxx |      -1       4     -59     -19      4 |      -3     13
jpl   uxuuu |      47    -213      62     -12     -6 |      24     28
mit   uuuuu |      -8      28    -220    -154      4 |      13     18
ngs   uuuuu |     -83      38      69     -23     -4 |       8     11
sio   uuuuu |     139     100     145     109      3 |      28     32



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