[IGSREPORT-19967] Wk 1643 IGS Final Orbits

Jim Ray igs.acc at noaa.gov
Fri Jul 22 06:00:21 PDT 2011


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1643   (Jul 03, 2011 - Jul 09, 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:

igs1643[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1643[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1643[0-6].cls  IGS GPS clock combination summary report.
igs16437.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16437.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   | 26
                0  |  ESA   | IRKJ UNSA
                0  |  GFZ   | 15 23 BOR1 BRUS GUAT MDVJ NYA1
                0  |  GRG   | USN3
                0  |  JPL   | 25
                0  |  MIT   | 6 16 26 30 6 26 30 KHAJ GUAT KHAJ
                1  |  COD   | USNO PRDS USNO
                1  |  ESA   | UNSA
                1  |  GFZ   | 15 23 MDVJ PRDS
                1  |  GRG   | USN3
                1  |  JPL   | 25
                1  |  MIT   | 16 23 26 16 23 26 BRMU DAV1 PRDS
                2  |  COD   | GUAT
                2  |  EMR   | 26 26
                2  |  GFZ   | 13 15 23 31 DAV1 GUAT NYA1 QAQ1
                2  |  GRG   | GUAT IRKJ USN3 WTZR
                2  |  JPL   | 25
                2  |  MIT   | 26 30 26 30 MAW1 MAW1
                3  |  COD   | CHUR
                3  |  ESA   | 3 DUBO
                3  |  GFZ   | 7 15 23 MDVJ
                3  |  GRG   | AMC2
                3  |  JPL   | 3 25
                3  |  MIT   | 26 30 26 30 USNO USNO
                4  |  COD   | 26
                4  |  ESA   | 21 21 26 UNSA
                4  |  GFZ   | 15 21 23 31 MDVJ
                4  |  GRG   | USN3
                4  |  JPL   | 15 25 COCO
                4  |  MIT   | 21 30 21 30 CAS1 USNO USNO
                5  |  COD   | ALIC WES2
                5  |  EMR   | 26 26 MATE
                5  |  ESA   | IRKJ UNSA WIND
                5  |  GFZ   | 7 12 13 15 23 31 MDVJ
                5  |  GRG   | IRKJ
                5  |  JPL   | 15 25
                5  |  MIT   | 26 10 26 MAW1 MAW1
                6  |  EMR   | 26 26
                6  |  ESA   | UNSA
                6  |  GFZ   | 7 13 15 23 WILL YAKT
                6  |  JPL   | 15 25
                6  |  MIT   | 16 26 30 16 26 30 MAW1

 5. 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.
    

 6. 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     .6     .3     -11     -4      7     .05
       EMR  |    3.8    8.6    4.4      -6      8     -8     .21
       ESA  |    1.7   -1.3    5.0       4    -46     63     .20
       GFZ  |   -2.3     .4     .0      -8     40     16     .05
       GRG  |    6.2    -.1   26.5      -2     22    -32    -.06
       JPL  |    3.0    2.6    5.4      -1     13     63   -1.23
       MIT  |    5.8   -3.3   16.1     -12      4    -13     .04
       NGS  |    4.9    -.6   17.6     -40      1      8     .04
       SIO  |    4.1   -1.5   -8.6     -43   -149     28     .03


 7. 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.

 8. 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.

 9. 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 1.1643.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1643.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 2.1643.[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 3.1643.[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 5.1643.0-6).

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 1643 summary.                       (Jul 03, 2011 - Jul 09, 2011)

Table 1.1643.a   GPS week: 1643   MJD: 55745.000-55751.000

         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    -1   -25     3  -.21    9    8 |   -1023    -319     17     90
        |    0     0     1    12    13    13   .03           |     512     795
emr   95|    2     1    -5   -32     8    -8   .36   17   17 |    2396    -950     15    113
        |    1     2     2    19    24    17   .06           |    1477     783
esa  130|    0     0     1   -43    37     6   .26    8    8 |      47   -1447     15    160
        |    0     0     1    11    17     9   .04           |    1175    1330
gfz  197|   -1     0    -2   -11  -105    -1  -.24   12   12 |     284    -158     25    155
        |    1     1     1    51    75     8   .05           |     400     312
grg  132|    3     0    17   -35   -46   -25   .51   18   16 |     117    -317     52    226
        |    1     1     4    45    18    37   .06           |     260     372
igr  n/a|    0     0     0    -3   -22   -48  -.08    5    5 |   11727   -1897     21    119
        |    0     0     0    20     9    13   .03           |    3550    1014
jpl  123|    0     0    -2   -48   -38    -2   .49   18   17 |    2344    -901     20    361
        |    1     0     0    11    17    71   .05           |    1498    1080
mit  257|    1     0     0     0    -3    -4  -.30   13   11 |   -1196     651     21    196
        |    1     0     0    10    16    26   .04           |     611     873
ngs  222|    0     0     1    92   -22    -5  -.23   10    9 |   -1035    -338   2216   3917
        |    0     0     1    34    30    13   .03           |     511     797
sio  250|   -1     1    -3    60   306    26  -.07   19   17 |     ---     ---    ---    ---
        |    0     0     0    13    20    13   .04           |     ---     ---


Table 1.1643.b   GPS week : 1643   MJD: 55745.000-55751.000   

         Satellite position sigmas for the combined orbits
         (coded in the IGS SP3 orbit files).
         "E" flags eclipsing satellites.
         Units: mm.

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    0    0    0    0    0    0    0 |
   2  |    4    5    5    5    5    5    5 |
   3  |    4    4    4    4    4    4    4 |
   4  |    4    4    5    5    4    4    4 |
   5  |    5    5    5    5    5    5    5 |
   6  |    4    4    4    4    4    4    4 |
   7  |    4    5    5    5    5    5    5 |
   8  |    4    4    4    4    4    4    4 |
   9  |    4    4    4    4    4    4    4 |
  10  |    4    4    4    4    4    4    4 |
  11  |    4    4    4    4    3    4    4 |
  12  |    5    5    5    5    5    6    5 |
  13  |    4    4    5    5    4    4    5 |
  14  |    4    5    5    4    4    4    5 |
  15  |    5    5    6    5    5    5    5 |
  16  |    5    5    6    6    6    5    5 |
  17  |    4    4    5    5    5    5    5 |
  18  |    5    5    6    5    5    5    5 |
  19  |    5    6    5    5    4    4    4 |
  20  |    4    4    4    5    5    4    4 |
  21  |    4    4    4    5    4    4    4 |
  22  |    5    5    5    5    5    5    4 |
  23  |    5    5    6    7    6    5    6 |
  24  |    3    4    4    3    3    3    4 |
  25  |    5    5    6    6    6    5    5 |
  26  |    5    5    6    5    5    6    7 |
  27  |    4    4    4    4    4    4    4 |
  28  |    4    4    4    4    6    7    5 |
  29  |    5    5    5    5    5    5    4 |
  30  |   10    7    8    7    9    8    7 |
  31  |    4    5    6    5    5    5    5 |
  32  |    4    4    4    4    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 2.1643.0   GPS week: 1643   Day: 0   MJD: 55745.000                            

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   -10   -19     6  -.21    9    9 |    -998    -781     20     95
        |                     14    21                       |
emr   95|    3     2    -4     6   -17   -16   .41   17   17 |    4030    -977     19    128
        |                     -5   -57                       |
esa  130|    0     0     1   -44    34    17   .30    9    9 |      42   -1544     13    145
        |                     29    49                       |
gfz  197|    0     0    -3    12     0    -4  -.20   10   10 |     583    -380     25    157
        |                     24   111                       |
grg  132|    2     0    19   -44   -77   -33   .60   16   15 |     184    -407     45    285
        |                     93    77                       |
igr  n/a|    0     0     1   -11   -37   -37  -.05    5    5 |   15978   -1867     20    114
        |                     28    24                       |
jpl  123|    1     0    -2   -61   -57    30   .47   18   17 |    3395    -825     20    386
        |                     64    66                       |
mit  269|    0    -1     0    -8     8   -24  -.27   11    9 |   -1416     935     22    241
        |                     -2   -13                       |
ngs  222|    0    -1     3    65   -80    -5  -.26    9    9 |    -949    -855   2311   4588
        |                     17    57                       |
sio  250|   -1     0    -3    47   326    45   .00   18   17 |     ---     ---    ---    ---
        |                    -22  -177                       |

Table 2.1643.1   GPS week: 1643   Day: 1   MJD: 55746.000                            

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   -25    -5    -3  -.21    9    9 |    -652    -578     20    104
        |                     36   -32                       |
emr   95|    3     4    -1   -49    23   -28   .30   18   18 |    3311    -403     16    103
        |                     28   -67                       |
esa  130|    1     0     1   -32    33    -6   .25    8    8 |    -191    -892     17    160
        |                     55    81                       |
gfz  197|    0     0    -2    57  -110     9  -.22   11   11 |     925    -285     23    150
        |                     41   108                       |
grg  132|    2     0    19   -78   -27   -43   .57   17   15 |     412    -717     56    220
        |                    118     9                       |
igr  n/a|   -1     0     0     9   -11   -44  -.06    5    5 |   14424   -1004     21    129
        |                      1    17                       |
jpl  123|   -2     0    -2   -58   -18   138   .46   18   17 |    2908     154     20    354
        |                    152   -69                       |
mit  269|    0    -1     0    11   -26   -36  -.27   10   10 |   -1106     500     26    203
        |                     -5   -25                       |
ngs  222|    1     0     2    74   -23   -19  -.24   11    9 |    -679    -575   2171   3880
        |                    -28    28                       |
sio  250|   -2     0    -4    62   270    23  -.08   17   17 |     ---     ---    ---    ---
        |                    -47  -190                       |

Table 2.1643.2   GPS week: 1643   Day: 2   MJD: 55747.000                            

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|   -1     0    -3    -1   -37    -2  -.25   10   10 |    -805   -1277     18    100
        |                     40    32                       |
emr   95|    2     0    -3   -28     0    -8   .27   17   17 |    3390    -891     16    113
        |                     41   -46                       |
esa  130|    0     0     0   -33    14     4   .25    8    8 |     641   -1281     17    159
        |                     25    57                       |
gfz  197|   -3     0    -1   -75   -80     8  -.29   14   13 |     228    -239     27    148
        |                     -3   125                       |
grg  132|    3     0    22   -31   -59   -25   .47   17   15 |     278    -495     40    196
        |                     52    19                       |
igr  n/a|    0     0     0     7   -27   -35  -.12    5    5 |   13964   -1696     23    125
        |                      4    48                       |
jpl  123|    0     0    -2   -29   -36   -13   .41   17   16 |    3621    -656     22    384
        |                    -22    35                       |
mit  269|    1     0    -1   -14   -10    -7  -.28   14   13 |    -969    -295     23    176
        |                      5   -22                       |
ngs  222|    1    -1     0   143   -28   -19  -.24   11   10 |    -814   -1266   2408   3774
        |                    -49    25                       |
sio  250|   -1     1    -4    43   305    42  -.11   17   16 |     ---     ---    ---    ---
        |                    -23  -194                       |

Table 2.1643.3   GPS week: 1643   Day: 3   MJD: 55748.000                            

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    -4     7   -37   -10  -.24    9    8 |   -1902    1178     18     91
        |                     35    10                       |
emr   95|    0     0    -7   -41     0     4   .33   17   17 |    2547    -854     16    111
        |                     29   -56                       |
esa  130|    0     0     3   -30    32    18   .19    9    9 |   -2299     183     14    169
        |                     14    41                       |
gfz  197|   -1     0    -2   -72   -84    -6  -.26   12   13 |     147     280     26    163
        |                     34   113                       |
grg  132|    2     0    17   -64   -52   -44   .46   16   14 |    -162     183     56    230
        |                     74    33                       |
igr  n/a|    0     0     0    27   -28   -44  -.12    5    5 |   12324   -2167     22    127
        |                     21    33                       |
jpl  123|   -1     0    -1   -35   -35   -26   .49   17   16 |    3051   -1121     20    375
        |                    -32   -25                       |
mit  269|    2    -1    -1     5    -7    41  -.28   15   14 |   -2264    2208     22    209
        |                      2   -18                       |
ngs  222|    0     0     1   118   -30     0  -.22   10    9 |   -1900    1153   2503   3898
        |                     -1    14                       |
sio  250|   -1     1    -4    57   318    28  -.08   18   17 |     ---     ---    ---    ---
        |                    -20  -187                       |

Table 2.1643.4   GPS week: 1643   Day: 4   MJD: 55749.000                            

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     9   -13    25  -.23    9    8 |   -1357     201     14     83
        |                     63    23                       |
emr   95|    0     1    -7   -39    56   -27   .35   18   18 |    2751   -2594     15    111
        |                     17   -92                       |
esa  130|    0     0     0   -55    54    -6   .26    9    8 |    1547   -4118     15    160
        |                     41    46                       |
gfz  197|   -3    -2     0    -8  -226     6  -.30   13   13 |      24     299     26    151
        |                     18   117                       |
grg  132|    2     2    19   -58   -46   -23   .54   16   14 |     325    -665     58    209
        |                     71    -6                       |
igr  n/a|    0     0    -1   -26   -15   -66  -.12    6    6 |   11252   -3964     21    104
        |                     27    34                       |
jpl  123|    0     0    -4   -49   -14   -48   .53   19   17 |    3035   -3136     20    383
        |                     77    22                       |
mit  269|    1    -1     0    11   -14     6  -.34   13   12 |   -1462    1210     19    177
        |                     -1   -11                       |
ngs  222|    0     0     1    85    17   -12  -.19    9    9 |   -1427     218   2012   4031
        |                     -6   -36                       |
sio  250|    0     1    -4    72   288    17  -.05   18   18 |     ---     ---    ---    ---
        |                    -34  -166                       |

Table 2.1643.5   GPS week: 1643   Day: 5   MJD: 55750.000                            

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     7   -37    -8  -.19    9    9 |    -320    -619     16     85
        |                     13    29                       |
emr   95|    0     0    -4   -25     0    17   .43   17   17 |     744    -783     15    122
        |                     42   -35                       |
esa  130|    0     0     1   -48    65     8   .27    7    7 |     260   -1688     16    167
        |                     48    31                       |
gfz  197|   -1    -1    -2   -29  -176   -13  -.23   14   14 |     400    -347     24    156
        |                     41   110                       |
grg  132|    4    -2    14   -32   -32   -60   .44   19   18 |    -292     193     58    217
        |                     60   -35                       |
igr  n/a|    0     0     0     1   -21   -42  -.07    5    5 |    7922   -1647     19    113
        |                     30    46                       |
jpl  123|    0     0    -3   -51   -50   -17   .53   18   17 |     546    -678     19    316
        |                     36    -4                       |
mit  269|    1     0     0    -8     3    11  -.35   12   12 |    -294      -6     17    172
        |                      4    -6                       |
ngs  222|    0     0     0   111     2    18  -.24    9    8 |    -346    -647   1946   3570
        |                    -79   -24                       |
sio  250|   -1     2    -3    55   306    20  -.08   20   18 |     ---     ---    ---    ---
        |                    -41  -163                       |

Table 2.1643.6   GPS week: 1643   Day: 6   MJD: 55751.000                            

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     0     0   -25    18  -.16    8    7 |   -1131    -362     13     76
        |                     41    38                       |
emr   95|    3     0    -7   -47    -1    -3   .42   18   18 |       3    -149     13    108
        |                     37   -28                       |
esa  130|    0     0     2   -58    24     7   .31    8    8 |     330    -795     14    166
        |                     47    14                       |
gfz  197|   -1    -1    -3    38   -58    -6  -.17   11   10 |    -317    -434     25    161
        |                     56    76                       |
grg  132|    7     1    10    58   -31    55   .50   23   21 |      77    -312     57    229
        |                   -136   -27                       |
igr  n/a|    0     0     0   -31   -16   -69  -.05    5    5 |    6229    -935     21    125
        |                      9    46                       |
jpl  123|    0     0    -2   -51   -55   -82   .55   20   18 |    -148     -47     21    332
        |                      7    50                       |
mit  269|    1     0     0     5    23   -20  -.34   12   10 |    -865      11     22    195
        |                     -1     2                       |
ngs  222|    0    -1     2    43   -18    -1  -.18   10    7 |   -1134    -396   2166   3681
        |                    -28   -35                       |
sio  250|   -1     1    -2    82   328     7  -.11   22   20 |     ---     ---    ---    ---
        |                    -52  -159                       |

       
       
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 3.1643.0   GPS week: 1643   Day: 0   MJD: 55745.000                            

        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  |    3  ---  ---  ---  ---   60  ---  ---  ---  ---    0 |    24  ---  ---  ---  ---   84  ---  ---  ---  ---    23
   2  |    8   13    8   13   11    4   15   12    9   25    4 |    25   26   29   32   31   27   22   30   27   30    26
   3  |    8   12    8    9   15    4   10   10   11   19    3 |    12   20   14   15   18   14   18   16   17   23    13
   4  |    9    9    9   10   13    4   10    7   11   27    4 |    39   46   45   40   53   42   44   44   42   35    42
   5  |    9   18   10   12   19    5   23   14    9   17    4 |    22   29   21   22   27   21   32   20   20   28    21
   6  |    8   13    7    9   13    4   11   10   11   16    3 |    15   25   17   13   22   16   22   14   18   23    15
   7  |    7   18    8    8   17    5   19   11    9   18    4 |    20   32   24   19   25   20   28   22   20   18    19
   8  |   10   14   11    7   15    5   11   10   10   20    4 |    16   26   25   17   17   18   24   22   17   28    18
   9  |    9   13    8    8   13    5   11    8    7   18    3 |    14   25   15   17   14   17   21   20   20   27    17
  10  |    8   14    9   12   14    6    9   13   10   15    4 |    22   27   26   19   32   23   24   30   26   26    24
  11  |   11   12    8    8   13    4   14    7    7   19    3 |    38   40   42   36   48   39   39   37   39   30    37
  12E |   10   20   11   13   28    4   20   10    8   19    5 |    14   28   20   18   32   16   25   19   19   24    16
  13E |    8   16    8    9   19    5   18    9    8   14    4 |    19   30   22   19   33   20   25   23   24   27    21
  14E |    7   17    8   12   21    5   20    8    7   12    4 |    13   24   19   22   24   15   22   15   16   20    15
  15E |    8   23   12   13   18    6   23   11   11   11    5 |    23   33   23   21   24   21   28   32   26   32    25
  16E |    7   25    8   10   19    7   22   13   12   13    4 |    20   33   26   18   31   21   30   21   21   28    21
  17  |   10   15   14    9   18    7   17    8    6   19    4 |    24   33   24   21   36   23   35   19   21   21    22
  18  |    7   26    9    9   16    6   23   10   11   22    5 |    17   36   19   13   27   19   34   19   19   21    18
  19  |    8   19   10    9   19    4   23   18   13   21    5 |    19   29   18   18   25   18   30   27   20   28    19
  20  |    8   15    7   11   11    4   15    8    8   10    3 |    21   28   16   16   19   19   24   18   17   20    17
  21  |    8   10    8    6   16    6   19   11    9   24    4 |    24   36   32   25   38   29   32   29   29   27    28
  22  |    6   25   11    9   16    5   19    7    9   18    4 |    14   34   14   10   28   14   27   14   14   16    14
  23E |    8   18    9   12   20    7   26   13    8   13    4 |    22   31   25   24   28   25   30   21   26   24    23
  24  |   10    9    8    8   13    7    7    6    7   14    3 |    26   28   28   23   33   28   24   27   27   24    26
  25E |   11   20   10    8   16    5   24   16   11   21    5 |    20   33   26   20   31   22   36   20   25   19    21
  26E |   15   22   10   12   17    7   17   14   12   21    5 |    43   48   43   43   35   43   42   50   44   45    43
  27  |   12   12    6   10   15    6   12    9    6    9    3 |    22   30   20   20   17   22   26   26   26   29    23
 X28E |    9   15   12    7  ---    5   17   10    9   15    4 |    44   50   50   47  ---   47   54   44   46   47    46
  29  |    8   20   14    8   16    5   26    9   10   20    5 |    23   36   25   20   29   21   35   19   20   26    22
 X30E |   20   29   19   23   30   11  ---   20  ---  ---   10 |    59   73   59   66   70   60  ---   60  ---  ---    62
  31  |    5   16    8    6   19    4   21    7    9   20    4 |    12   27   19   17   29   14   25   15   15   18    15
  32  |   10   16    8    8    8    4   15    7    7   12    3 |    14   21   13   14   16   14   17   16   16   17    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   17    9   10   16    5   18   11    9   18      |T   23   32   25   23   29   26   29   25   23   26    23
 WRMS |    9   17    9   10   15    5   17    9    9   17      |NE  21   30   23   20   27   24   27   23   22   24    21
 MEDI |    8   16    9    9   16    5   17   10    9   18      |MD  21   30   24   20   28   21   27   21   20   26    21

Table 3.1643.1   GPS week: 1643   Day: 1   MJD: 55746.000                            

        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  |    4  ---  ---  ---  ---  197  ---  ---  ---  ---    0 |    23  ---  ---  ---  ---  118  ---  ---  ---  ---    23
   2  |    7   11    9   13   10    3   14   12   15   23    4 |    13   21   19   18   19   17   18   21   19   24    16
   3  |    8   15    7    8   15    7   12   11   14   19    4 |    15   23   15   15   16   15   19   15   17   21    14
   4  |   10   10    9   10   13    5    8   12    8   27    4 |    27   34   35   29   39   31   37   35   27   28    31
   5  |   10   15    8   12   16    4   21   11   11   19    4 |    15   20   13   12   20   11   23   18   14   24    12
   6  |   10   15    8   10   14    6   12   10   14   18    4 |    15   26   16   12   18   14   24   11   18   21    14
   7  |    8   21    8   11   19    6   18   11    9   17    4 |    17   32   21   21   29   19   27   20   19   18    18
   8  |    8   15    7   10   13    5    9   11    9   20    3 |    18   26   21   18   23   20   25   25   21   29    20
   9  |    7   14    7    8   11    4   10    9   13   20    3 |    13   21   17   14   12   14   20   20   17   22    13
  10  |    8   12    9   10   16    5   11   15   12   13    4 |    16   23   21   17   30   18   24   29   24   26    21
  11  |    9   15    6   10   13    4   17    7    8   18    3 |    27   34   29   32   38   28   31   28   30   25    28
  12E |   10   19   11   13   24    4   22    9    9   13    4 |    16   27   18   18   31   16   29   22   21   21    17
  13E |   10   18    9   12   15    6   19   10   11   11    4 |    11   23   14   14   22   11   21   17   16   16    12
  14E |    8   15    7   12   29    6   20   12    9   13    4 |    13   25   16   13   25   13   21   16   13   18    13
  15E |    7   21   11   12   27    6   25    9   14   11    5 |    14   23   16   14   17   11   22   19   13   18    13
  16E |   10   26    8   13   18    6   25   12   13   14    5 |    12   25   19   15   24   14   29   14   16   17    13
  17  |   10   18    8    7   17    4   18    9    8   19    4 |    18   28   20   16   32   17   32   16   17   16    17
  18  |   10   24    7   12   15    5   22    9   12   21    4 |    17   34   20   13   23   16   33   22   19   20    18
  19  |   11   24    6   10   15    5   22   18   15   22    5 |    13   29   16   15   21   14   28   19   15   22    14
  20  |    7   15    9   10   14    6   18    8   11   13    3 |    12   19   11   13   16   11   21   15   15   14    10
  21  |    9   12    8   11   12    5   13   10   12   23    4 |    15   27   24   16   23   19   26   22   20   21    19
  22  |    8   24    9   12   15    4   22    8   10   18    4 |    12   30   13   10   23   10   29   14   12   14    11
  23E |    8   25   11   11   17    6   26   12   12   14    5 |    15   27   17   18   20   14   24   17   18   17    14
  24  |    7   15    6    9   15    4   10    8    9   13    3 |    17   24   19   20   26   18   18   21   20   17    18
  25E |    9   21    7    9   18    5   24   12    8   12    4 |    15   32   23   22   27   20   35   23   19   20    19
  26E |   15   19   10   17   15    8   13   13   15   18    5 |    43   43   40   41   38   40   40   46   42   38    40
  27  |    7   16    6   10   13    5   10    9   12   12    3 |    13   21   15   12   14   12   19   18   15   18    13
  28E |    7   14    8   10   17    6   15    8    7   20    4 |    34   38   38   33   38   34   42   36   35   39    35
  29  |    9   23   10   11   14    6   22    8   11   17    4 |    14   30   14   20   20   14   28   15   14   20    14
 X30  |   13   24   15   13   17   17  ---   13  ---  ---    6 |    51   62   54   57   49   52  ---   51  ---  ---    53
  31  |    7   18    9   23   20    4   20    6    9   19    5 |    11   28   20   17   31   14   28   14   13   16    15
  32  |   11   19    6    8   12    4   17    8    6   12    3 |     8   16   11   13   14    9   16   14   11   13     8
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18    8   11   17    5   18   10   11   17      |T   17   28   20   19   25   21   26   21   19   21    18
 WRMS |    9   18    8   11   15    5   17   10    9   17      |NE  15   26   18   16   23   20   25   19   17   20    16
 MEDI |    8   18    8   11   15    5   18   10   11   18      |MD  15   27   19   16   23   15   25   19   17   20    15

Table 3.1643.2   GPS week: 1643   Day: 2   MJD: 55747.000                            

        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  |    4  ---  ---  ---  ---  153  ---  ---  ---  ---    0 |    24  ---  ---  ---  ---  125  ---  ---  ---  ---    22
   2  |    9   14    8   14   12    5   11   17   14   22    4 |    19   27   22   24   26   22   23   30   22   24    21
   3  |    9   14    6   14   14    4   11    9   13   18    4 |    13   16   13   16   17   11   14   15   19   21    12
   4  |   11   11    9   13   14    5    9   14   11   26    4 |    30   37   35   33   41   32   35   38   32   27    32
   5  |    8   18    9   13   16    5   20   18    8   18    4 |    14   25   14   16   24   12   25   22   16   19    13
   6  |   10   14    6   12   10    4   11    9   15   16    4 |    15   19   17   15   22   14   19   16   21   22    15
   7  |    7   17    6   13   21    6   18   14   10   14    4 |    18   31   22   21   24   20   26   29   24   24    20
   8  |    8   14    8   10   14    4   10   15    9   17    4 |    18   28   20   20   18   18   22   32   24   31    20
   9  |   12   15    8   12   14    4    9   12   11   19    4 |    21   24   16   15   16   15   21   25   16   26    17
  10  |    8   16    7   13   13    5    8   16   10    9    4 |    16   26   20   17   27   18   20   29   19   19    19
  11  |   14   11    6   12   10    4   14   12   11   15    4 |    32   34   31   27   42   29   32   29   31   25    30
  12E |   11   15   10   14   21    5   14   14    9   15    4 |    23   33   25   27   37   23   30   34   24   30    26
  13E |    9   13    8   15   19    4   20   16    9    9    4 |    15   21   17   15   27   13   21   19   19   18    15
  14E |    9   12    7   14   18    7   19   13    7   16    4 |    14   24   18   17   20   13   21   18   16   21    15
  15E |   10   21    9   13   26    5   25   11   11   13    5 |    15   26   16   17   18   15   23   22   18   23    15
  16E |    9   21    9   17   18    8   25   16   15   13    5 |    24   33   27   23   36   23   33   23   24   27    24
  17  |   10   16    8   10   20    4   18   12   10   21    4 |    24   36   26   24   33   24   33   27   28   25    25
  18  |   10   24   13   13   18    6   23   12   14   18    5 |    14   31   16   13   20   13   31   21   16   16    14
  19  |    9   20   10   12   18    6   21   17   16   19    5 |    16   28   18   17   25   13   27   21   19   21    15
  20  |    8   18    9   11   12    5   17   13    9   14    4 |    18   24   15   14   15   14   22   22   18   18    15
  21  |    8   11    8   10   13    6   12   16   11   23    4 |    16   25   26   21   27   19   23   26   20   19    21
  22  |    8   21   11   16   18    3   20   12    9   17    5 |    13   30   15   16   25   11   27   18   11   14    12
  23E |   11   21   10   15   20    6   26   17   11   13    5 |    14   24   18   15   21   13   23   23   18   22    14
  24  |   12    9    7   11   10    3    8   12    9   12    3 |    24   23   23   18   27   19   16   24   20   20    20
  25E |   18   17    9    8   20    6   21   19   11   14    5 |    27   28   30   25   34   22   40   31   26   22    25
  26E |   16   20   11   20   17    7   13   16   11   18    5 |    35   36   31   36   29   32   30   38   35   27    30
 X27  |   11   13    6   13   14    5  ---   12   10   12    4 |    19   22   15   17   17   15  ---   22   15   20    15
  28E |    9   15    8   12   15    6   14   12    8   11    4 |    33   39   35   29   26   33   38   38   36   36    34
  29  |   10   22    8    9   17    6   22   13    9   19    5 |    23   32   24   19   25   20   31   25   19   26    21
 X30  |   11   24   12   15   21   12  ---   21  ---  ---    7 |    40   53   36   38   55   40  ---   48  ---  ---    40
  31  |    8   17    8   28   20    5   18    9   13   18    5 |    11   25   17   25   30   10   24   14   14   15    12
  32  |   10   16    7   10   11    5   16   14    8   10    4 |    15   18   15   14   16   12   17   21   19   18    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   17    8   14   17    5   17   14   11   17      |T   20   28   21   20   26   22   25   25   21   22    20
 WRMS |   10   17    8   13   15    5   16   13   10   16      |NE  18   26   20   19   24   22   24   24   20   21    18
 MEDI |    9   16    8   13   17    5   17   14   10   16      |MD  18   27   20   18   25   18   24   24   19   22    19

Table 3.1643.3   GPS week: 1643   Day: 3   MJD: 55748.000                            

        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  |    4  ---  ---  ---  ---   92  ---  ---  ---  ---    0 |    24  ---  ---  ---  ---   48  ---  ---  ---  ---    24
   2  |    6   16   11    9   12    4   12   20    8   24    4 |    17   18   22   22   23   19   19   29   20   18    17
   3  |    9   12    8   10   10    4   11   10    7   17    3 |    13   20   12   11   13   11   18   15   16   19    11
   4  |   10   14    9   13   13    6   11   15    9   27    4 |    28   32   33   31   40   31   34   35   33   27    30
   5  |    9   21    9   15   19    6   21   18    8   20    5 |    14   24   13   21   20   12   25   23   15   22    12
   6  |    9   13    6   12    9    4   11   12    8   16    3 |    13   23   15   11   19   12   23   14   16   19    13
   7  |    8   17    9   22   21    5   18   13    9   14    5 |    19   29   21   30   27   18   27   27   23   23    20
   8  |    8   15    8   10   14    6    9   15    7   18    4 |    18   29   20   23   20   17   26   30   24   29    21
   9  |    7   13    7   10   16    4   11   14   12   21    4 |    16   20   18   17   16   14   22   24   19   24    16
  10  |    6   13    8    8   16    6   10   17    9   13    3 |    15   24   21   18   28   16   24   24   20   18    18
  11  |    9   11    7   12    9    4   12   10   10   13    3 |    29   32   37   35   41   33   35   31   33   26    32
  12E |   12   16   11   12   19    5   17   14   11   18    4 |    20   27   24   22   29   16   24   24   18   15    20
  13E |    7   18   10   13   19    4   18   14   12   10    4 |    13   21   17   15   20   13   22   21   16   17    13
  14E |    7   15    8   10   16    5   19   12    8   14    4 |    13   23   19   12   23   11   24   18   14   19    14
  15E |    8   15   10   15   22    5   23   15   12   11    5 |    15   22   16   21   20   13   29   23   17   18    16
  16E |    7   24    8   19   20    8   23   17   13   15    5 |    22   35   22   22   33   22   31   24   24   26    22
  17  |    8   23    8    8   17    5   20   12    7   21    4 |    26   38   23   23   32   22   36   23   25   25    24
  18  |    7   20    7   13   19    4   21   12   14   18    5 |    16   29   17   16   23   16   32   19   19   18    16
  19  |    7   20    9   10   15    4   19   15    7   17    4 |    18   30   18   17   22   15   26   23   18   19    16
  20  |    8   19    9   12   13    4   19   17   12   16    4 |    20   27   11   16   17   16   25   22   19   23    14
  21  |    7   13   12   13   18    5   11   11   10   24    4 |    20   29   25   27   32   24   29   29   27   21    25
  22  |    7   22    8   11   16    5   19   13   12   18    4 |    13   29   14   12   23   11   28   16   15   14    12
  23E |   10   20   10   14   16    7   26   35   15   28    6 |    15   24   18   15   19   16   25   35   21   32    15
  24  |    6   12    5   10    9    6    7   11    9   12    3 |    20   23   26   26   28   22   23   25   24   21    22
  25  |   13   26    7    8   20    6   21   17   12   20    5 |    46   58   51   47   54   47   62   50   53   45    48
  26E |   16   16   13   14   18    9   14   14   13   18    5 |    44   41   41   44   37   39   40   46   43   35    40
 X27  |    7   13    6   12   15    4  ---   14   11   13    4 |    15   21   18   20   18   15  ---   27   19   24    17
  28E |    9   14    9   11   18    5   14   13    9   10    4 |    42   52   46   44   32   45   51   47   48   47    45
  29  |    7   19    8    9   16    4   20   15    9   21    4 |    20   31   19   19   22   20   29   25   21   25    19
 X30  |   13   24   15   11   15    8  ---   19  ---  ---    7 |    36   48   39   37   37   34  ---   35  ---  ---    36
  31  |    7   18    9    9   22    4   17   13   10   19    4 |    13   28   18   19   31   13   26   16   16   16    13
  32  |    8   15    6    8   10    5   14   14    9    9    3 |    12   16   14   10   14   11   14   20   16   14    10
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   17    9   12   16    5   17   15   10   18      |T   20   29   22   22   26   21   28   26   23   23    20
 WRMS |    8   17    9   13   14    5   16   14    9   17      |NE  18   26   19   20   24   18   26   23   20   21    18
 MEDI |    8   16    8   11   16    5   17   14    9   17      |MD  18   28   19   21   23   16   26   24   19   21    17

Table 3.1643.4   GPS week: 1643   Day: 4   MJD: 55749.000                            

        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  |    4  ---  ---  ---  ---   43  ---  ---  ---  ---    0 |    22  ---  ---  ---  ---   63  ---  ---  ---  ---    22
   2  |    9   13   10   14   10    5   17   17    8   28    4 |    14   19   22   23   23   17   18   25   17   20    17
   3  |    7   16    7    8   11    8   13   12    7   16    3 |     9   20   12   13   13   12   18   16   15   20    11
   4  |    9   11    7   12   12    6   10   12   11   29    4 |    28   32   33   26   38   29   35   29   30   23    28
   5  |    9   19    8   18   15    7   25   17    6   20    5 |    12   24   16   20   18   11   28   22   15   21    13
   6  |    9   15    7    8   10    7   14   12    8   13    3 |    11   22   15   13   21   13   24   14   16   21    13
   7  |    7   18   10   14   19    6   17   11    9   14    4 |    14   28   22   22   27   15   25   21   17   18    16
   8  |    6   13    6   12   12    6   10   13    7   17    3 |    11   24   18   21   20   14   23   21   16   24    15
   9  |    8   13    8    9   15    5   14   11   12   23    4 |    14   20   14   18   15   14   22   19   16   21    13
  10  |    6   13    9    9   13    6    9   13    9   14    3 |    10   21   18   17   26   14   19   18   14   14    13
  11  |    7   11    6    9    9    4   14   11    8   14    3 |    26   30   27   32   39   27   33   24   28   23    27
  12  |    6   20   11   15   17    5   25   14   11   16    5 |    21   30   25   27   28   20   29   22   22   19    20
  13E |    7   18    9    8   14    7   22   15    9   10    4 |     9   21   16   11   20   11   23   16   13   15    11
  14E |    7   14    6   11   21    5   18   11    7   16    4 |    10   21   19   14   20   12   22   14   14   20    13
  15E |    5   19    9   12   25    4   27   14    8   10    5 |    13   25   19   18   19   15   24   21   19   19    15
  16  |   12   24   10   14   22   10   24   14   10   15    5 |    41   50   49   46   53   43   49   43   44   42    44
  17  |    9   19   11    7   20    5   21    8   10   22    4 |    22   33   22   17   34   20   34   19   19   19    20
  18  |    6   21    8   11   14    4   23   11   13   20    4 |    10   29   17   12   21   12   30   15   10   16    11
  19  |    6   18    7    9   13    7   17   11    8   16    3 |    13   27   17   16   22   16   26   16   16   21    15
  20  |    7   21   10   14   12    5   17   12    9   17    4 |    14   22   12   13   14   10   21   15   11   15     8
  21  |    8   16   10   11   13    9   14    9    9   24    4 |    21   32   31   22   28   26   26   27   23   21    24
  22  |    6   21    7   12   14    5   21   11   10   19    4 |    10   31   16   14   27   13   30   13   11   15    13
  23E |    8   20   10   23   13    6   25   19   10   13    5 |     9   21   17   30   15   11   21   20   14   19    11
  24  |    7   13    5    9   10    6    9   11    5   13    3 |    16   19   17   22   25   18   18   17   16   17    16
  25  |    8   26    9   13   23    4   22   14    9   22    5 |    17   35   24   17   34   17   35   19   15   23    17
  26E |   18   18    9   14   22    9   16   13   10   17    5 |    42   41   40   48   36   40   38   50   45   33    41
 X27  |    8   12    6   10   15    6  ---   12   11   13    4 |    12   16   12   15   15   13  ---   20   15   16    11
  28E |   25   17   11   14   16    6   17   12    7   13    5 |    44   69   68   66   35   63   68   66   64   62    60
  29  |    8   21    7   13   17    5   25   13    9   21    5 |    15   28   17   16   24   15   27   19   16   19    14
 X30  |   13   22   22   13   30   10  ---   18  ---  ---    8 |    28   36   38   30   42   31  ---   25  ---  ---    30
  31  |    8   16    7   26   21    5   22    8   10   21    5 |    12   28   24   28   31   16   31   15   12   18    16
  32  |    8   14    6   12   11    5   15   13    7   11    3 |     8   14   13   14   13    9   18   15   14   11     9
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18    9   13   16    6   19   13    9   18      |T   17   28   22   22   25   20   28   22   19   21    18
 WRMS |    8   18    8   13   14    6   17   12    9   18      |NE  14   24   18   18   23   18   25   19   16   18    15
 MEDI |    8   18    8   12   14    6   17   12    9   16      |MD  14   27   18   18   24   15   26   19   16   19    15

Table 3.1643.5   GPS week: 1643   Day: 5   MJD: 55750.000                            

        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  |    3  ---  ---  ---  ---   78  ---  ---  ---  ---    0 |    22  ---  ---  ---  ---   70  ---  ---  ---  ---    21
   2  |   10   15    6   19   13    6   17   15    9   29    4 |    13   18   16   24   17   11   15   20   11   19    12
   3  |    8   14    6    9   13    4   13   13    7   19    3 |     9   17   13   12   16   11   17   20   13   19    11
   4  |    9   12    6   11   13    6   11    9   11   32    4 |    24   27   29   21   30   24   29   23   22   20    23
   5  |   12   19    9   13   15    7   25   16    9   19    5 |    10   23   13   16   18   10   26   19   15   21    10
   6  |   10   13    5    9   12    4   12   12    6   17    3 |    11   20   16   15   18   13   21   19   12   20    13
   7  |    8   19    7   22   27    4   20   14    8   16    5 |    15   26   19   24   31   16   27   19   15   18    15
   8  |    8   15    5   10   18    6    9   13    9   17    3 |    11   24   16   17   22   11   19   18   14   22    13
   9  |   14   13    8    8   15    3   10   11   12   23    4 |    14   21   14   14   19   12   19   18   14   20    12
  10  |    9   15    6    8   15    6    9   14   11   17    4 |    14   26   21   15   25   16   23   21   18   17    17
  11  |   10   10    5    9   14    5   13   11    7   16    3 |    24   25   24   20   31   22   25   23   25   17    22
  12  |    7   18    9   33   31    4   19   13    9   16    6 |    14   25   19   29   34   14   20   18   18   16    15
  13E |    8   17    7    8   16    3   23   17    7   10    4 |    13   20   16   12   21   14   25   20   14   15    13
  14E |    8   16    6   11   19    5   21   10    8   16    4 |    12   24   18   14   21   14   23   14   17   19    14
  15E |   11   16   11   12   35    6   24    9   12   12    5 |    13   20   16   17   20   14   23   18   19   17    13
  16  |    7   28    6   13   26    8   22   12    7   19    5 |    24   32   28   24   37   25   31   25   23   28    24
  17  |    8   19    7    9   18    5   20   11   11   23    4 |    17   30   22   17   29   16   30   18   15   18    17
  18  |    7   19    7   12   19    5   20    9   10   22    4 |    16   29   22   17   23   19   29   20   19   23    17
  19  |    7   18    9   12   19    5   19   10    7   18    4 |    12   25   15   14   24   12   23   16   13   17    12
  20  |    8   17    8   12   12    7   19   12    8   23    4 |    14   21   15   13   13   16   26   15   15   14    12
  21  |    7   19    7   10   11    5   12    9   11   25    4 |    15   26   19   19   21   18   21   20   15   16    16
  22  |    6   20   10   10   20    5   21    9    8   19    4 |    14   28   18   17   25   15   28   15   15   18    15
  23E |    6   19    8   12   18    5   27   15    9   23    5 |    12   21   17   18   18   14   26   22   14   26    14
  24  |   10   12    5    7   14    6   10   10    6   16    3 |    18   17   19   14   23   16   18   18   19   13    16
  25  |    8   20    7   17   26    6   22   14    9   19    5 |    20   33   25   21   41   22   39   25   23   26    22
  26E |   18   16   11   17   22    7   17   18   14   21    5 |    39   40   38   44   38   39   41   49   44   37    39
  27  |   11   11    7   11   16    4    9   10   10   13    3 |    13   17   15   14   21   13   19   18   14   16    12
 X28  |   36   17   10   12  ---   11   18   15   10   16    7 |    98  105  105  101  ---   99  106  100   99   95    99
  29  |    9   24    8   12   16    5   23   12    9   19    4 |    22   35   23   24   24   22   32   24   21   25    21
 X30  |   14   24   17   12   22    7  ---   14  ---  ---    7 |    28   40   33   35   45   30  ---   29  ---  ---    30
  31  |    7   20    8   22   26    5   19    9    9   20    5 |    13   31   21   18   35   16   28   13   19   16    15
  32  |    8   14    8    5   13    4   19   12    7   14    3 |    12   15   14   14   16   13   20   15   15   12    11
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   17    7   14   19    5   18   12    9   20      |T   18   27   22   21   25   21   27   22   20   22    19
 WRMS |    9   17    7   14   18    5   17   12    8   18      |NE  15   23   18   17   22   17   23   18   16   18    15
 MEDI |    8   17    7   12   16    5   19   12    9   19      |MD  14   25   19   17   23   16   25   19   15   18    15

Table 3.1643.6   GPS week: 1643   Day: 6   MJD: 55751.000                            

        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  |    3  ---  ---  ---  ---   35  ---  ---  ---  ---    0 |    18  ---  ---  ---  ---   39  ---  ---  ---  ---    18
   2  |    5   18   11   15   16    5   17   10   10   30    4 |    23   27   30   28   32   22   21   29   25   25    23
   3  |    8   18    6   10   21    5   14   10    8   20    4 |    13   24   16   14   26   13   21   12   16   23    13
   4  |    5   12    8    9   17    4    8   10   12   32    4 |    33   38   40   37   45   35   38   35   36   31    35
   5  |    8   20   11   13   22    7   26   15   10   23    5 |    11   23   12   16   24   10   29   21   19   26    13
   6  |    9   14    8    9   17    4   13    6    9   19    3 |    11   24   19   13   22   14   25   12   16   23    14
   7  |    6   21    8   14   29    4   24   13    8   20    4 |    23   35   28   34   31   25   33   27   27   30    25
   8  |    6   12    8   12   18    4   15    9    9   19    3 |    19   25   24   24   25   20   28   26   23   27    21
   9  |    9   15    5    9   21    4    9   10   10   23    3 |    14   20   17   18   22   14   24   14   14   19    14
  10  |    5   14    9   10   18    5   11   13   12   21    4 |    17   24   24   22   34   20   23   23   22   20    20
  11  |    9   13    3    8   19    3   16    9    5   18    3 |    37   42   42   41   50   39   40   37   41   34    39
  12  |    6   19    9   11   25    5   24   11   10   19    4 |    14   26   22   22   30   14   24   11   19   16    15
  13E |    7   19    9   12   25    3   23   14    8   19    4 |    18   29   22   15   27   15   29   18   18   25    17
  14E |    7   15    8   10   31    5   21   12   10   18    4 |     8   20   16   10   21   12   23   13   16   17    10
  15E |    5   19   10   10   27    5   28   12    7   10    4 |    15   21   23   17   23   13   24   19   18   19    16
  16  |    8   26    5   12   33    5   27   14   11   20    5 |    17   31   24   25   37   21   31   25   20   24    20
  17  |    8   18   10    9   19    5   22   12   13   23    4 |    25   34   22   23   32   22   34   21   23   26    22
  18  |    5   22    8    9   20    6   24    9    7   26    4 |    17   32   20   19   21   19   36   20   19   25    18
  19  |    6   18    5   10   25    4   17   12    9   14    4 |    16   30   18   18   25   18   30   18   23   19    17
  20  |    4   17    8   14   19    2   23    8    9   22    4 |    17   23   16   18   23   15   28   16   20   19    15
  21  |    6   11    6    9   16    4   15    8    7   27    3 |    25   30   33   30   34   29   26   30   27   23    27
  22  |    5   21    8    9   19    6   22    9    6   18    4 |    14   29   15   11   24   13   29   14   14   18    13
  23E |    6   21   11   11   28    6   27   23   11   39    6 |    14   24   20   19   20   13   24   34   17   42    16
  24  |   10   14    4    8   18    3   14    8    6   17    3 |    23   29   27   29   36   25   30   26   28   21    26
  25  |    6   24    8   16   31    3   26   10    9   21    5 |    20   32   24   25   37   20   38   25   23   25    21
  26E |   19   19   11   16   20    6   18   26   17   26    6 |    44   46   44   46   45   43   43   50   46   41    43
  27  |    8   13    5    9   20    5   10   13    8   16    3 |    10   17   15   17   21   12   20   14   13   13    12
  28  |    7   19   10   10   37    6   19    9    6   11    4 |    50   53   53   53   56   52   57   51   52   50    51
  29  |    7   22    7    8   20    5   22    9    8   21    4 |    20   32   17   19   25   17   29   20   19   23    18
 X30  |    9   22   10   19  ---    9  ---   10  ---  ---    6 |    30   39   35   32  ---   28  ---   29  ---  ---    30
  31  |    8   17    9   12   30    6   18    9   14   22    4 |    15   28   21   15   34   17   28   13   21   16    15
 X32  |    6   18    6   10  ---    3   14    8    6   13    3 |    14   19   16   17  ---   13   21   16   21   14    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   18    8   11   23    5   20   12   10   22      |T   20   29   24   23   30   21   29   23   23   24    21
 WRMS |    7   18    8   10   21    5   18   10    7   20      |NE  18   27   22   22   29   20   28   21   22   22    19
 MEDI |    6   18    8   10   20    5   18   10    9   20      |MD  17   29   22   19   27   18   28   21   20   23    18



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 4.1643   GPS week: 1643   MJD: 55745.0-55751.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3047 |U    9    11    27 |U    7     9    30 |U   17    13    27 |
emr | emr 2972 |U   11    12    33 |U    9    15    38 |    18    15    28 |
esa | esa 2976 |    10    11    26 |U    6     9    30 |    16    12    27 |
gfz | gfz 2970 |U   12    13    34 |U   11    25    60 |U   17    13    28 |
grg | grg 2921 |    12    13    32 |U    7    10    37 |    23    19    33 |
igr | igr 2975 |    10    10    26 |     6     9    29 |    14    11    24 |
igs | igs 2967 |    10    11    27 |     7    16    37 |    16    13    26 |
jpl | jpl 2832 |    15    14    40 |U    9    18    47 |    15    23    29 |
mit | mit 2976 |U   10    11    27 |U    8    20    45 |U   17    13    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 5.1643.0   GPS week: 1643   Day: 0   MJD: 55745.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3029 |     9    10    23 |     4     7    19 |  ----  ----  ---- |
emr | emr 2972 |    12    17    35 |     8     9    25 |    11    13    13 |
esa | esa 2976 |    10    11    26 |     3     7    17 |  ----  ----  ---- |
gfz | gfz 2967 |    13    14    40 |     8    22    63 |  ----  ----  ---- |
grg | grg 2880 |    14    14    38 |     5     9    37 |  ----  ----  ---- |
igr | igr 2976 |    10    11    25 |     3     6    18 |  ----  ----  ---- |
igs | igs 2956 |    10    11    25 |     5    13    24 |     8    11    17 |
jpl | jpl 2875 |    15    15    39 |     5    12    30 |     9    17    22 |
mit | mit 2976 |    11    12    27 |     5    19    40 |  ----  ----  ---- |

Table 5.1643.1   GPS week: 1643   Day: 1   MJD: 55746.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3058 |    12    16    30 |     5     7    23 |     7     8    14 |
emr | emr 2972 |    13    16    38 |     7     9    22 |    10    10    22 |
esa | esa 2976 |    13    14    27 |     5     7    24 |     7     7    12 |
gfz | gfz 2968 |    13    15    28 |     9    20    47 |     8     7    14 |
grg | grg 2976 |    13    13    31 |     5    10    33 |     9     8    13 |
igr | igr 2976 |    12    13    25 |     4     7    23 |     7     7    14 |
igs | igs 2976 |    12    15    28 |     6    11    22 |    10    12    19 |
jpl | jpl 2866 |    17    18    37 |     7    16    33 |     9     9    20 |
mit | mit 2976 |    12    13    28 |     7    18    26 |    10     9    26 |

Table 5.1643.2   GPS week: 1643   Day: 2   MJD: 55747.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3052 |     9    19    43 |     4     8    15 |  ----  ----  ---- |
emr | emr 2972 |    10    17    40 |     9    19    38 |  ----  ----  ---- |
esa | esa 2976 |     9    16    42 |     3     8    16 |  ----  ----  ---- |
gfz | gfz 2972 |    10    21    62 |    12    25    50 |  ----  ----  ---- |
grg | grg 2976 |    10    18    44 |     5     8    30 |  ----  ----  ---- |
igr | igr 2975 |     9    16    41 |     3     8    15 |     4     6    13 |
igs | igs 2964 |     9    17    41 |     5    18    31 |  ----  ----  ---- |
jpl | jpl 2780 |    15    19    67 |     7    20    41 |     6     8    22 |
mit | mit 2976 |    10    17    37 |     6    20    39 |     8    10    15 |

Table 5.1643.3   GPS week: 1643   Day: 3   MJD: 55748.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3051 |    10    11    20 |     5     6    20 |     9    10    23 |
emr | emr 2972 |    12     9    30 |     6     7    20 |    10     7    22 |
esa | esa 2976 |    12    11    20 |     4     5    17 |     8     7    20 |
gfz | gfz 2972 |    12    11    22 |     8    24    49 |     9     7    24 |
grg | grg 2976 |    14    11    19 |     6     8    19 |     9     8    23 |
igr | igr 2976 |    12    11    20 |     4     7    18 |     8     8    19 |
igs | igs 2976 |    11    10    20 |     5    10    18 |    10     7    20 |
jpl | jpl 2780 |    13    10    25 |     7    13    27 |    12    11    21 |
mit | mit 2976 |    11    10    20 |     7    22    34 |    13    10    19 |

Table 5.1643.4   GPS week: 1643   Day: 4   MJD: 55749.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3053 |     9     9    22 |     5     6    19 |    53    32    70 |
emr | emr 2972 |    11    10    26 |     6    16    36 |    58    39    74 |
esa | esa 2976 |     8     8    21 |     4     5    18 |    53    33    73 |
gfz | gfz 2972 |    12    12    27 |     9    22    70 |    55    37    74 |
grg | grg 2976 |     8     9    24 |     5     6    20 |    74    58    87 |
igr | igr 2976 |     7     8    20 |     4     4    18 |    54    35    71 |
igs | igs 2972 |     8     9    21 |     5    16    35 |    55    35    71 |
jpl | jpl 2780 |    12    13    33 |     6    15    37 |    51   103    79 |
mit | mit 2976 |     8    10    23 |     6    18    41 |    59    38    87 |

Table 5.1643.5   GPS week: 1643   Day: 5   MJD: 55750.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3045 |     9     7    22 |    19    23    89 |     8     9    17 |
emr | emr 2972 |    12     7    34 |    18    31    89 |     9    11    22 |
esa | esa 2976 |    10     7    23 |    19    20    87 |     8     8    18 |
gfz | gfz 2973 |    12     7    25 |    22    36   107 |     7     7    17 |
grg | grg 2880 |    16    19    35 |    19    25    91 |    15    14    23 |
igr | igr 2974 |     9     6    22 |    18    21    90 |     7     8    17 |
igs | igs 2956 |     9     7    24 |    21    26    97 |     7     8    17 |
jpl | jpl 2868 |    21    13    41 |    26    38   105 |     9    10    24 |
mit | mit 2976 |     9     9    23 |    22    26    92 |     8     8    17 |

Table 5.1643.6   GPS week: 1643   Day: 6   MJD: 55751.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3044 |     9     7    27 |     5     9    23 |     7     5    11 |
emr | emr 2972 |    10     9    31 |     6    13    39 |     7     7    15 |
esa | esa 2976 |     9     7    28 |     5     9    31 |     6     6    12 |
gfz | gfz 2972 |    13    10    34 |     9    23    38 |     6     6    13 |
grg | grg 2784 |    11     8    34 |     7     7    32 |     8     9    21 |
igr | igr 2976 |     9     7    28 |     5     7    25 |     6     5    12 |
igs | igs 2973 |     9     7    29 |     5    14    32 |     6     5    12 |
jpl | jpl 2876 |    12    12    38 |     8    13    53 |     8     7    15 |
mit | mit 2976 |     9     7    29 |     6    17    40 |     5     6    15 |


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 6.1643   GPS week: 1643   MJD: 55745.500-55751.500

                                                         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     -19      55      35     -2 |       5     17
            |      29      20     108     112      7 |       2
emr   uuuuu |      76     -12      18     221      1 |      24     32
            |      26      24      91      22      3 |       5
esa   uuuuu |     -24     -22      47    -191      2 |      15     23
            |      18      14      63      75      6 |       6
gfz   uuuuu |     -87     -15      62    -182     -6 |      12     22
            |      15      20      82      48      4 |       3
grg   uuxux |      12     -32      26     -80     20 |     -85    144
            |      26      79     281     153     71 |       7
igr   xxxxx |     -14      -2      77     -24      1 |       1     16
            |      21      16      80      77      7 |       4
irf   xxxxx |      22      15       0     -26      1 |       5     20
            |      14      10      36      38      4 |       6
jpl   uuuuu |      11     -25      65     130     -2 |      -2     21
            |      46      55      67      71     11 |       4
mit   uuuuu |      35      15    -124      44      5 |      15     24
            |      20      14      56      46      5 |       6
ngs   uuuuu |      18      40     -87     192     -3 |       9     19
            |      24      29      80     107      6 |       3
sio   xuuuu |     198      50     102      41      4 |      30     38
            |      25      18      99      76     10 |       9


Table 7.1643.0   GPS week: 1643   Day: 0   MJD: 55745.500

                                                         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 |      24       8      -4     245     -7 |       1     18
emr   uuuuu |     102      27     -85     180      3 |      16     26
esa   uuuuu |      -4      -7      48    -156     13 |       5     18
gfz   uuuuu |     -66      -2     141    -177      0 |       6     20
grg   uuxux |     -32     -71     240    -264     16 |     -78    143
igr   xxxxx |      21      -6     120      18      9 |      -6     18
irf   xxxxx |      45      22       7      59      8 |      -5     20
jpl   uuuuu |     -21     -42      30     112    -20 |      -8     24
mit   uuuuu |      58      24     -99     134      3 |       6     20
ngs   uuuuu |     -12       5     -70     100    -12 |       5     17
sio   xuuuu |     222      44      27     188     22 |      15     31

Table 7.1643.1   GPS week: 1643   Day: 1   MJD: 55746.500

                                                         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 |      55      -3     -49     -33     -8 |       3     18
emr   uuuuu |      90       5     -72     245      7 |      19     29
esa   uuuuu |     -58     -22       1    -302      6 |       9     21
gfz   uuuuu |     -85      -8     147    -105     -9 |       9     21
grg   uuxux |      14     -85     221     -71     76 |     -82    143
igr   xxxxx |       6      32      16      62      8 |      -2     17
irf   xxxxx |      23      33      44     -52      3 |       0     20
jpl   uuuuu |      92    -119      -2     194     -1 |      -7     24
mit   uuuuu |      48      38     -68      39      3 |      10     21
ngs   uuuuu |      -5      61     -56     287     -3 |       6     17
sio   xuuuu |     213      80      76     -66      8 |      22     35

Table 7.1643.2   GPS week: 1643   Day: 2   MJD: 55747.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       1     -38     237      32    -12 |       5     17
emr   uuuuu |      79     -39     -78     227     -3 |      22     31
esa   uuuuu |     -24     -23     149    -227      6 |      14     21
gfz   uuuuu |     -92       5     132    -189     -6 |      11     21
grg   uuxux |      14     -50     128    -114     66 |     -83    143
igr   xxxxx |     -15      -2     150     -15    -11 |       2     16
irf   xxxxx |      33       2      26     -40      3 |       3     18
jpl   uuuuu |      -2      24      -8     182     -6 |      -6     23
mit   uuuuu |      55      -3     -99      50      8 |      13     22
ngs   uuuuu |       8      51    -187     220     -1 |       8     18
sio   xuuuu |     227      25      18      33      1 |      29     37

Table 7.1643.3   GPS week: 1643   Day: 3   MJD: 55748.500

                                                         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 |      12     -22      48      53      2 |       7     18
emr   uuuuu |      78     -16      85     223      1 |      25     33
esa   uuuuu |     -19      -1     -40    -256     -2 |      18     25
gfz   uuuuu |     -91     -21      85    -259     -6 |      14     22
grg   uuxux |     -11     -61       2    -229     36 |     -81    143
igr   xxxxx |     -11      -8     108     -99     -6 |       4     16
irf   xxxxx |      22      13     -59     -42      2 |       7     20
jpl   uuuuu |      47      45      38     209     -5 |      -1     20
mit   uuuuu |      40      11    -226      39     13 |      17     25
ngs   uuuuu |       8      14      57     356      4 |      11     20
sio   xuuuu |     209      33       5      70     -4 |      35     40

Table 7.1643.4   GPS week: 1643   Day: 4   MJD: 55749.500

                                                         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     -42     100    -128     -1 |       6     17
emr   uuuuu |     102       4      74     228      1 |      26     34
esa   uuuuu |     -36     -20      97    -173      0 |      18     25
gfz   uuuuu |    -107       3     -25    -217    -13 |      14     22
grg   uuxux |      16     -50     123    -115     47 |     -86    144
igr   xxxxx |     -24      -6     175    -125      1 |       4     16
irf   xxxxx |      10      21     -26     -42     -4 |       8     20
jpl   uuuuu |     -12     -56     165     139      6 |       0     20
mit   uuuuu |      21      22    -168      36      5 |      19     27
ngs   uuuuu |      46      27    -128     193      3 |      11     19
sio   xuuuu |     176      55     142      22     -8 |      35     40

Table 7.1643.5   GPS week: 1643   Day: 5   MJD: 55750.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -18      -3     124      46      2 |       6     17
emr   uuuuu |      46     -32     109     205      2 |      28     34
esa   uuuuu |     -20     -38      63     -84     -2 |      19     25
gfz   uuuuu |     -99     -31     -27    -161     -4 |      13     22
grg   uuxux |      46     -50      55      73     34 |     -92    144
igr   xxxxx |     -35     -20     -28     -71      3 |       3     16
irf   xxxxx |      11      10      23     -26      1 |       9     20
jpl   uuuuu |      15     -26     102      46      2 |       1     19
mit   uuuuu |      17       6     -82      27      6 |      20     27
ngs   uuuuu |      35      89    -155      46     -3 |      11     20
sio   xuuuu |     174      51     179      21      4 |      36     41

Table 7.1643.6   GPS week: 1643   Day: 6   MJD: 55751.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -30     -34     -70      29      8 |       8     16
emr   uuuuu |      36     -30      92     238     -1 |      31     35
esa   uuuuu |      -6     -40      13    -140     -5 |      21     25
gfz   uuuuu |     -68     -49     -16    -166     -6 |      15     22
grg   uuxux |      35     143    -582     162   -134 |     -96    145
igr   xxxxx |     -38      -2       2      65      5 |       6     14
irf   xxxxx |       8       7     -16     -39     -3 |      11     19
jpl   uuuuu |     -42       0     129      29     14 |       4     17
mit   uuuuu |       6       8    -125     -19     -4 |      24     28
ngs   uuuuu |      43      35     -68     139     -8 |      12     19
sio   xuuuu |     167      59     271      22      4 |      39     42



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