[IGSREPORT-19985] Wk 1644 IGS Final Orbits

Jim Ray igs.acc at noaa.gov
Thu Jul 28 04:55:04 PDT 2011


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1644   (Jul 10, 2011 - Jul 16, 2011)

Contacts: J. Ray       (jim.ray at noaa.gov),
          J. Griffiths (jake.griffiths at noaa.gov)


COMBINATION STRATEGY:
---------------------

Starting with GPS week 860, the IGS Final orbit combination is done directly
in the ITRF without any alignment to the Bulletin B EOP series.

Each centre satellite clock corrections are first transformed to a common 
reference. One of the following two methods can be used (the REMARKS section of
this report gives which method is used):
[1] For each centre, a clock offset and a drift are estimated with respect to
    the broadcast clock corrections using only non-SA satellites;
[2] A chosen reference centre is aligned to the broadcast clock corrections
    using all satellites. All other centres are then aligned to that reference
    centre. 
The offsets and drifts are used to align each centre satellite clock
corrections to GPS time. Ephemerides and clock corrections are then combined
as weighted averages computed over all centres. Each centre is given a
position weight and a clock weight. The position weights are computed from
each centre's absolute deviation to the unweighted average orbit after the
estimation of a 7-parameter Helmert transformation. The clock weights are
either computed from [1] the absolute deviation of the initial alignment to
broadcast clock for the non-SA satellites, or [2] from the absolute deviation
of centre's aligned clock corrections with respect to the unweighted mean.
Finally, a 7-parameter Helmert transformation and clock offset and drift are
estimated for each centre with respect to the combined solutions and parameters
and RMS of fit reported. All the above estimations are performed using the
L1-norm robust scheme.

  Each centre ephemerides are also evaluated individually and independently from
the orbit combination by using week long arcs. The Earth Orientation Parameters
(EOP) used in this evaluation are those submitted by the respective centres.
The IGS combined orbits/clocks and all centres providing both orbit and clock 
solutions are further evaluated by an independent point positioning (navigation)
program that uses both phase and pseudorange data. This is primarily intended 
for testing clock solution precision as well as the orbit/clock consistency.

 Like the clock solutions broadcast in the navigation message, the combined
satellite clocks are corrected for the periodical relativistic correction (see
e.g. GPS interface Control document ICD-GPS-200, p.73):

                              -2*(X.V)/c  [distance unit],

where X and V are the inertial sv state and velocity vectors and c is the speed
of light. Also for compatibility, no satellite L1/L2 delay calibration should be
applied.


SOFTWARE:
---------

The weighted average software used was originally developed by T. Springer
and G. Beutler in 1993. The GPS long arc orbit analysis software used here for
individual centre ephemeris evaluation was developed by Beutler et al. at the
Astronomical Institute of the University of Bern (AIUB). For more details on
the orbit combination and complete references for both software see:

  Beutler G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS 
  Analysis Centers, Bulletin Geodesique, 69, pp 200-222.

  Kouba J., Mireault Y. and F. Lahaye, 1995, 1994 IGS Orbit/Clock Combination
  and Evaluation, Appendix I of the Analysis Coordinator Report, International
  GPS Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.

  Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1995 Annual Report, 
  pp. 45-76.

  Kouba J. and Y. Mireault, 1997, Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1996 Annual Report, 
  pp. 55-100.


PRODUCTS GENERATED:
-------------------

The resulting average ephemeris and clocks are output to daily files in SP3
format. The satellite accuracy codes displayed in the header are based on the
weighted RMS for each satellite. Note that each file contains all the
satellites that appear in any of the centre ephemeris files. If a satellite or
centre was excluded from combination, a note in the REMARKS section of this
report will identify the exclusion and the reason.

  The resulting x and y earth rotation parameters (ERP) associated with the IGS
ephemeris files and their rates (xrt, yrt) are computed using a weighted average
of all available centres (as part of the separate SINEX combination since GPS
week 1051; weighted according to the orbit combination before that time). 

  Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
Final IGS solutions.  AC LOD biases with respect to Bulletin A are estimated
using Bulletin A most recent 3 weeks (21 days), i.e. up to 5 days prior to
the last non-predicted day of Bulletin A.  AC LOD biases are removed and the
new AC bias-free LODs are used to compute a weighted IGS LOD which in turn
is integrated into IGS UT1-UTC. The starting UT1-UTC value is chosen as
Bulletin A fifth day prior to its last non-predicted day. Both IGS LOD and 
UT1-UTC values are printed in the IGS Final erp file.



The Final Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:

igs1644[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1644[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1644[0-6].cls  IGS GPS clock combination summary report.
igs16447.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16447.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  |  ESA   | UNSA
                0  |  GFZ   | 13 15 21 23 KOSG STJO WILL
                0  |  JPL   | 21 25 26
                0  |  MIT   | 14 26 14 26
                1  |  COD   | 26 26
                1  |  ESA   | 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                1  |  ESA   | 21 22 23 24 25 26 27 28 29 30 31 32 2 3 4 5 6 7 8
                1  |  ESA   | 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
                1  |  ESA   | 26 27 28 29 30 31 32 IRKJ
                1  |  GFZ   | 13 14 23 26 MDVJ
                1  |  GRG   | IRKJ
                1  |  JPL   | 21 25 IRKJ MCM4
                1  |  MIT   | 10 30 30 MCM4 IRKT MCM4 TWTF
                2  |  COD   | 21 CEDU
                2  |  EMR   | 26 21 26
                2  |  ESA   | 21 CEDU IRKJ
                2  |  GFZ   | 13 14 23 26
                2  |  GRG   | IRKJ
                2  |  JPL   | 15 25 26 GUAT PERT
                2  |  MIT   | 26 21 26 30 MAW1 CEDU DAV1 GUAT MAW1
                3  |  EMR   | 26 26
                3  |  ESA   | BJFS IRKJ
                3  |  GFZ   | 13 14 26 MDVJ OPMT VILL WAB2
                3  |  GRG   | IRKJ
                3  |  JPL   | 25
                3  |  MIT   | 26 26 HRAO HRAO
                4  |  COD   | CONZ CONZ
                4  |  EMR   | 26 26
                4  |  ESA   | IRKJ UNSA
                4  |  GFZ   | 13 14 26 YAKT
                4  |  GRG   | IRKJ
                4  |  JPL   | 25 26
                4  |  MIT   | 26 30 26 30
                5  |  COD   | CAS1
                5  |  EMR   | 26 26 MATE
                5  |  GFZ   | 12 13 14 26 MATE MDVJ YAKT YAR2
                5  |  GRG   | IRKJ
                5  |  JPL   | 25 26
                5  |  MIT   | 3 26 30 3 26 30 CAS1 MDVJ PERT TWTF WROC MDVJ WROC
                6  |  EMR   | 26 26
                6  |  ESA   | UNSA
                6  |  GFZ   | 7 13 14 26 MDVJ WILL
                6  |  JPL   | 25 26
                6  |  MIT   | 26 30 14 26 30

 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  |     .0     .3     .6     -29     10     -7     .06
       EMR  |    -.7    6.2   -2.0      10      2     18     .21
       ESA  |    1.0   -3.1    6.1      -1    -49     64     .22
       GFZ  |   -2.3     .2    -.1     -24     47      9     .06
       GRG  |    6.0   -1.0   18.7      -3      8    -21    -.04
       JPL  |    2.1    2.6   -1.5      15      7     51   -1.07
       MIT  |    4.5   -2.2   16.0     -13      4    -15     .03
       NGS  |    6.1    -.3   15.2     -24      2     -3     .04
       SIO  |    1.5   -2.8   -6.2     -64    -82      8     .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 1.1644.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1644.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 2.1644.[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 3.1644.[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 5.1644.0-6).

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 1644 summary.                       (Jul 10, 2011 - Jul 16, 2011)

Table 1.1644.a   GPS week: 1644   MJD: 55752.000-55758.000

         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  252|    0     0    -1    25   -26   -13  -.17    7    7 |    -415    -202     13     72
        |    0     0     0     7    10    21   .03           |     370     589
emr   94|    0     0    -6   -67    11    11   .39   17   17 |     893    -264     18    110
        |    2     2     1    21    29    10   .02           |     599    1004
esa  127|    0     0     2   -46    78    16   .29    8    8 |    -622    -688     43    163
        |    1     0     1    20    18     7   .02           |    1749    1698
gfz  197|    0     0    -2    19  -118   -13  -.19   11   10 |     130     240     24    151
        |    1     0     1    41    87    14   .04           |     288     616
grg  133|    2    -1     9   -48     8   -24   .46   20   17 |     983    -311     55    227
        |    0     0     1    21    32    22   .21           |     797     855
igr  n/a|    0     0     0   -25     0   -25  -.05    5    5 |    4557    -670     20    109
        |    0     0     0    16    13    13   .03           |    1458     983
jpl  124|    0     0    -6   -79    -9     0   .56   19   17 |     735    -315     21    305
        |    1     0     2    13    11    48   .04           |     753     863
mit  264|    0     0     0    10   -22   -21  -.33   11   10 |     443    -548     23    181
        |    0     0     0    16    13    15   .03           |     942    1174
ngs  225|    0     0     3    23     0    25  -.16    9    7 |  -32346  -12071   2091   3806
        |    0     0     1    17    49    11   .03           |   84561   31323
sio  253|   -1     1    -1   122   151     6  -.08   19   17 |     ---     ---    ---    ---
        |    0     1     0    21    16    10   .04           |     ---     ---


Table 1.1644.b   GPS week : 1644   MJD: 55752.000-55758.000   

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



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 2.1644.0   GPS week: 1644   Day: 0   MJD: 55752.000                            

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  252|    0     0    -3    20   -10     3  -.19    8    7 |    -401    -254     12     72
        |                     20     8                       |
emr   94|   -2    -1    -5   -97    44     7   .41   18   18 |    1485    -670     18    107
        |                     36   -33                       |
esa  127|   -2     0     2   -90    99     1   .30    9    9 |    -882    1229     17    160
        |                     56    10                       |
gfz  197|   -2     0    -2    87  -230   -15  -.21   10    9 |     442    -105     23    161
        |                      6   101                       |
grg  133|    3     0     9   -91   -44    -9   .64   15   12 |    1379    -760     51    215
        |                     92    22                       |
igr  n/a|    0     0     0   -22    21   -40  -.07    5    5 |    6755   -1390     20    116
        |                     29    30                       |
jpl  124|    0     0    -2   -74    -3    -6   .51   19   17 |    1327    -713     21    321
        |                    -42    51                       |
mit  277|    1     0     0    43   -12     0  -.37   14   10 |    -105    -120     25    183
        |                     -9    18                       |
ngs  225|    1     0     2     6    78    26  -.18    9    8 | -224112  -83091   1976   3662
        |                    -19   -61                       |
sio  253|    0     0    -1   166   167   -10  -.08   21   16 |     ---     ---    ---    ---
        |                    -99   -88                       |

Table 2.1644.1   GPS week: 1644   Day: 1   MJD: 55753.000                            

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  252|   -1     0    -1    29   -30   -43  -.18    7    6 |     225    -164     16     77
        |                     12    13                       |
emr   94|    2     0    -6   -48    33    -3   .39   18   18 |     468     331     17    112
        |                      2   -30                       |
esa  127|    0     0     1   -33    85    16   .30    7    7 |    1347   -3909    206    263
        |                     42    36                       |
gfz  197|   -1     0    -2   -37  -249    -5  -.24   11   11 |     253    1216     27    167
        |                     14   122                       |
grg  133|    2    -1     9   -40    25   -15   .66   15   13 |     548     422     46    225
        |                      8   -94                       |
igr  n/a|   -1     0     0    -9   -11   -27  -.09    5    5 |    5008    -354     22    124
        |                     25    66                       |
jpl  124|   -1     0    -7   -97     3    33   .52   20   19 |     239     434     23    293
        |                     46    70                       |
mit  277|    1     0     0     0   -20    -7  -.35   11    9 |    2039   -2151     23    180
        |                      0    12                       |
ngs  225|    0     0     3    47    54    27  -.17    8    7 |     275    -252   2362   3983
        |                    -38   -59                       |
sio  253|   -1     1    -2   119   159    13  -.06   19   17 |     ---     ---    ---    ---
        |                    -76   -82                       |

Table 2.1644.2   GPS week: 1644   Day: 2   MJD: 55754.000                            

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  252|    0     0    -1    38   -31     9  -.15    7    7 |    -397    -551     15     73
        |                     21    30                       |
emr   94|    1     1    -6   -51    35    22   .39   18   18 |    1644   -1386     17    110
        |                      8   -55                       |
esa  127|   -1     0     4   -41    59    28   .29    8    8 |    -562     -62     15    145
        |                     29    18                       |
gfz  197|   -1     0    -3    -6   -89     6  -.14   12   11 |     166     -62     22    148
        |                    -31    98                       |
grg  133|    3    -1    10   -26     5   -17   .68   15   14 |    1671   -1093     39    228
        |                      8   -35                       |
igr  n/a|    0     0     0   -16    -5    -5  -.06    5    5 |    5499   -1496     19     90
        |                     51    48                       |
jpl  124|    0     0    -6   -96    -6   -54   .56   18   17 |    1480   -1128     21    320
        |                     28    24                       |
mit  277|    0     0     0    -5   -13   -27  -.36   10    8 |     275    -680     23    192
        |                      1     1                       |
ngs  225|    1     0     0    38    -3     3  -.20    8    7 |    -505    -364   1664   3842
        |                     54    23                       |
sio  253|   -2     2    -2   119   149     4  -.05   20   19 |     ---     ---    ---    ---
        |                    -79   -79                       |

Table 2.1644.3   GPS week: 1644   Day: 3   MJD: 55755.000                            

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  252|    0     0     0    28   -26   -17  -.13    6    6 |    -452   -1174     11     70
        |                     31    36                       |
emr   94|    1     4    -5   -98   -32     4   .40   17   17 |    1116   -1600     19    120
        |                     28    13                       |
esa  127|    1     0     3   -25    48    13   .26    9    9 |   -2133    -741     18    159
        |                     34    17                       |
gfz  197|    1     0    -2    -9   -37   -13  -.13   10   10 |     438    -739     26    146
        |                     -9   118                       |
grg  133|    2    -2    10   -49    42   -66   .50   20   17 |    1808   -1393     65    214
        |                     42   -65                       |
igr  n/a|    0     0     1   -20     7   -31   .00    5    5 |    4945   -1765     21     91
        |                      5    55                       |
jpl  124|    0     0    -8   -73   -15    27   .58   19   17 |    1401   -1409     20    303
        |                    -22    79                       |
mit  277|    0    -1     0     6    -7   -16  -.30    9    8 |      84    -888     26    163
        |                     -8     5                       |
ngs  225|    0     0     4    15   -25    41  -.12    8    7 |    -312   -1451   2270   3938
        |                    -41     4                       |
sio  253|   -2     0    -2   127   168    22  -.07   17   17 |     ---     ---    ---    ---
        |                    -78   -95                       |

Table 2.1644.4   GPS week: 1644   Day: 4   MJD: 55756.000                            

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  252|    0     1     0    23   -12   -10  -.16    7    7 |   -1027     703     13     68
        |                     18     3                       |
emr   94|   -3     0    -5   -48   -12    15   .38   17   17 |     749    -153     19    110
        |                     -4    -2                       |
esa  127|    1     0     2   -45    89    16   .31    8    8 |    2018   -1675     17    137
        |                     29     6                       |
gfz  197|    0     0    -4    18  -120    -9  -.23   11   10 |     105     497     25    153
        |                     19    87                       |
grg  133|    2    -2     8   -56    20    -1   .24   25   20 |    1499    -379     65    243
        |                     72   -96                       |
igr  n/a|    0     0     0   -13   -10   -37  -.00    5    5 |    4173    -648     20    130
        |                     16    56                       |
jpl  124|    1     0    -7   -60     1   -67   .61   18   17 |    1029    -401     20    295
        |                     -7    -6                       |
mit  277|    1     0     0    -1   -28   -19  -.29   10   10 |    -890    1724     22    180
        |                    -10    12                       |
ngs  225|    1     0     5    25    -8    31  -.12    8    6 |    -998     724   2211   3647
        |                     -1    57                       |
sio  253|   -2     2    -1    98   141     7  -.06   18   17 |     ---     ---    ---    ---
        |                    -63   -82                       |

Table 2.1644.5   GPS week: 1644   Day: 5   MJD: 55757.000                            

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  252|    0     1    -1    25   -30   -37  -.18    7    7 |    -565    -217     15     71
        |                     18     0                       |
emr   94|    0    -2    -7   -61    -7     5   .35   17   17 |    -103     529     19    110
        |                      6   -24                       |
esa  127|    2     0     1   -45    90    20   .28    7    7 |   -1385    -284     13    134
        |                     57    -1                       |
gfz  197|    0     0     0    41   -48   -16  -.20   13   12 |    -308     344     25    149
        |                     29    63                       |
grg  133|    4    -1     7   -45    38   -20   .27   26   20 |    -201       7     69    233
        |                     52  -100                       |
igr  n/a|    0     0     1   -49   -12    -6  -.06    5    5 |    2545     -93     21     99
        |                      6    57                       |
jpl  124|   -2     0    -5   -79   -22    66   .58   19   17 |    -401     -23     24    311
        |                     16  -150                       |
mit  277|    0    -1     0    10   -46   -32  -.31   11   10 |     516    -722     25    193
        |                    -28    15                       |
ngs  225|    0     0     3    27   -57    25  -.15   10    8 |    -521    -283   2270   3884
        |                    -17    53                       |
sio  253|   -2     1     0   114   122     2  -.12   18   18 |     ---     ---    ---    ---
        |                    -69   -85                       |

Table 2.1644.6   GPS week: 1644   Day: 6   MJD: 55758.000                            

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  252|    0     1    -1    16   -39     4  -.21    7    7 |    -290     239     15     73
        |                     25    35                       |
emr   94|   -1    -3    -7   -68    18    26   .41   16   16 |     895    1098     18    106
        |                     -6   -45                       |
esa  127|    0     0     1   -43    73    15   .26    7    7 |   -2761     626     15    145
        |                     47   -13                       |
gfz  197|    0     0     0    45   -51   -41  -.17   10   10 |    -183     529     25    135
        |                     53   102                       |
grg  133|    2    -1     9   -29   -25   -42   .26   25   21 |     177    1018     55    236
        |                    -28   -30                       |
igr  n/a|    0     0     0   -49     8   -29  -.05    5    5 |    2980    1055     19    114
        |                     38    28                       |
jpl  124|    0     0    -7   -71   -24     3   .55   18   17 |      73    1030     18    294
        |                    -14     6                       |
mit  277|    1    -1     0    19   -26   -46  -.30   13   13 |    1183    -999     20    176
        |                    -33    15                       |
ngs  225|    1     0     3     0   -36    21  -.19    9    7 |    -249     218   1889   3687
        |                     25    51                       |
sio  253|   -1     2     0   107   153     8  -.14   19   18 |     ---     ---    ---    ---
        |                    -57   -93                       |

       
       
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 3.1644.0   GPS week: 1644   Day: 0   MJD: 55752.000                            

        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  ---  ---  ---  ---   45  ---  ---  ---  ---    0 |    48  ---  ---  ---  ---   72  ---  ---  ---  ---    47
   2  |    8   16   10   17   11    4   20   12    8   20    4 |    22   27   27   32   22   22   27   27   24   24    23
   3  |    7   18    8    8   13    5   15    8    9   20    3 |    29   34   31   29   29   30   32   33   29   35    29
   4  |    6   13    7    8   10    5   12    7    7   19    3 |    33   35   37   40   34   36   34   39   35   32    34
   5  |    8   22   10   10   17    6   27   12    9   26    5 |    17   24   22   24   23   20   28   24   24   30    19
   6  |    9   18    7   11   12    4   13    5    9   21    4 |    48   49   49   45   49   46   49   47   46   48    47
   7  |    6   18    8    7   18    4   18   13    8   16    4 |    20   31   26   26   27   23   28   24   20   22    21
   8  |   11   14   11   11   17    9   13   29    8   41    6 |    50   52   50   58   49   53   50   37   48   26    47
   9  |    8   14    9    9   13    4   13   10    7   17    3 |    16   24   24   23   21   18   28   21   18   21    18
  10  |    6   13    8    8   12    4   13    9    8   11    3 |    27   33   32   33   33   30   28   33   32   29    30
  11  |    9   12    6    8   10    4   15    7    8   13    3 |    33   41   41   35   47   36   41   33   37   34    36
  12  |    7   19    9   12   20    4   27    9    6   19    4 |    12   26   20   18   30   16   30   17   16   19    15
  13E |    8   22    7   11   16    5   20   24   14   14    5 |    25   39   31   27   36   26   35   35   26   34    27
  14E |    6   15    8   10   28    5   22   17   11   19    5 |    19   26   24   23   30   22   31   20   23   21    20
  15E |    8   20   16   11   15    5   26   24   11   18    5 |    35   37   39   41   36   29   39   31   30   26    33
  16  |    6   26    8   13   16    4   21   10   10   17    4 |    17   29   23   18   26   18   29   17   20   18    18
  17  |    8   20   11   10   17    3   22   14    8   12    4 |    29   34   21   24   27   24   38   24   22   28    23
  18  |    5   20   10   11   13    3   21    7    7   19    4 |    20   28   24   23   20   23   33   23   25   17    21
  19  |    8   17    8   10   17    5   20   15    9   21    4 |    25   35   26   25   32   24   37   27   23   26    25
  20  |    6   20   10   10    9    3   17    9    6   25    4 |    13   25   17   19   21   15   28   13   14   20    13
  21  |    5   14    9    7   11    3   15    7    9   30    4 |    25   30   29   24   29   27   31   28   27   31    26
  22  |    6   22   10    9   12    5   20    7    7   19    4 |    22   27   26   22   22   25   30   25   25   20    22
  23E |    7   19   10   11   11    6   25   14   11   10    4 |    20   28   25   20   23   20   32   24   21   24    20
  24  |    4   16    8    7   14    6   12    7    8    8    3 |    25   26   31   25   33   25   25   28   25   25    25
  25  |    8   26   11   10   17    5   31    9    7   11    4 |    15   36   28   26   32   22   41   22   22   25    21
  26E |   19   20   12   13   15    9   17   32   18   41    7 |    77   84   78   75   82   79   82   66   77   66    74
  27  |   10   14    8   10   13    4   12   12    7   18    4 |    12   18   19   20   16   14   23   21   13   22    14
  28  |    5   16    6    9   21    3   20   11    7   17    4 |    13   19   16   17   26   16   27   17   15   22    14
  29  |    6   23    9    7   15    4   24   10   11   17    4 |    25   38   24   27   31   26   39   26   27   27    25
 X30  |   10   23    9   22   12    6  ---   10  ---  ---    6 |    19   29   22   29   18   19  ---   21  ---  ---    19
  31  |    8   17    7    9   16    5   16    8   12   22    4 |    19   29   23   21   30   21   29   20   21   22    19
  32  |   10   18    7    7    9    4   14    7    5   14    3 |    16   20   21   18   24   15   24   18   15   22    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   18    9   10   15    5   19   14    9   21      |T   25   32   29   28   30   27   34   27   26   27    26
 WRMS |    7   18    9    9   12    5   17   10    8   16      |NE  24   30   27   26   28   26   32   25   24   25    24
 MEDI |    7   18    9   10   14    4   18   10    8   18      |MD  22   29   26   25   29   23   31   24   24   25    22

Table 3.1644.1   GPS week: 1644   Day: 1   MJD: 55753.000                            

        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  ---  ---  ---  ---  172  ---  ---  ---  ---    0 |    56  ---  ---  ---  ---  103  ---  ---  ---  ---    56
   2  |    6   13    4   17    9    5   19   10    8   23    4 |    13   19   14   25   15   14   23   17   13   15    13
   3  |    8   16    6   10   12    3   14    7    8   19    3 |    39   40   38   38   35   38   41   41   41   44    39
   4  |    6   12    7    9   13    5   14    8   11   23    3 |    24   22   21   29   20   23   18   28   22   19    21
   5  |    7   20    6   10   16    5   27    8    6   25    4 |    13   21   17   20   19   15   27   19   18   25    15
   6  |    9   15    6   12   13    4   14    5    7   20    3 |    54   53   54   53   45   53   55   55   55   58    54
   7  |    5   21    9   10   16    4   23   10    7   16    4 |    16   30   23   21   28   17   25   19   20   18    18
   8  |    5   14    7   10   12    4   12    9    6   15    3 |    22   28   26   19   24   21   25   17   23   16    20
   9  |    7   13    5   11   12    4   13    8    8   21    3 |    14   23   18   16   21   14   26   16   13   19    14
  10  |    5   12    6    9   15    5   12    6    8   15    3 |    18   21   18   21   20   19   18   20   23   19    18
  11  |    6   13    4   10   10    5   17    6    7   16    3 |    26   35   29   24   40   28   37   25   29   29    27
  12  |    5   17    8   12   21    5   24    8    5   18    4 |    12   23   20   18   30   14   28   19   17   19    15
  13E |    7   19    9   14   12    5   21   14    8   14    4 |    34   42   37   35   41   34   42   37   34   37    35
  14E |    6   16    7   13   27    5   22   18    9   16    5 |    14   23   18   15   24   16   27   25   16   21    16
  15E |    6   18    6    9   20    8   27    6    8   18    4 |    21   23   21   23   27   20   27   21   22   23    20
  16  |    5   28    7   15   16    4   25   11    8   21    4 |    15   29   22   15   25   16   28   17   18   15    16
  17  |    7   23    9   12   16    6   24   15    7   15    4 |    18   31   17   16   24   15   31   18   15   21    15
  18  |    7   23    9   12   11    4   25    6    8   17    4 |    12   25   12   14   19   10   26   12   13   11     9
  19  |    8   19    9   10   18    6   20   14    7   21    4 |    17   28   21   19   32   19   30   21   17   19    18
  20  |    5   20    6   12   10    5   23    7    5   24    4 |    13   23   15   15   20   13   26   13   12   16    12
  21  |    5   14    8    8   11    6   17   10   10   30    4 |    17   29   25   15   21   22   29   19   16   28    18
  22  |    6   22    9   10   11    4   24    7    5   18    4 |    13   23   13   13   18   13   24   15   13   14    11
  23E |    7   20   10   13   14    6   28   18    8   15    4 |    17   26   21   18   21   18   31   18   16   20    16
  24  |    4   12    4    9    9    6   12    6    7   10    2 |    22   23   25   23   23   21   21   21   19   24    21
  25  |    5   21   14   10   17    7   26   11    9   13    4 |    11   27   27   18   30   16   39   17   17   20    16
  26E |   18   20    9   15   16   13   19   21   13   16    5 |    36   38   36   43   43   37   41   46   44   42    37
  27  |    7   13    4   10   16    7   12   10    7   20    3 |    12   17   13   13   19   10   18   17   10   21    11
  28  |    5   13    6   11   18    5   18   13    6   17    3 |    11   18   15   13   27   13   20   14   15   16    12
  29  |    8   23    6    8   16    4   26   12    7   18    4 |    21   34   22   17   32   19   35   16   17   19    19
 X30  |   10   20   24   20   15   11  ---   15  ---  ---    8 |    16   25   34   24   18   15  ---   17  ---  ---    18
  31  |    6   18    6    9   16    5   17    7    9   27    4 |    16   28   21   21   29   17   27   16   18   20    17
  32  |    7   15    5    9   10    4   17    6    5   18    3 |    16   19   19   13   20   15   24   14   13   19    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   18    7   11   15    5   20   11    8   19      |T   20   27   22   21   26   22   28   21   20   22    20
 WRMS |    6   18    7   11   13    5   19    9    7   17      |NE  19   26   22   20   25   21   28   20   19   21    19
 MEDI |    6   18    7   10   15    5   19    9    7   18      |MD  16   25   21   19   24   17   27   18   17   19    17

Table 3.1644.2   GPS week: 1644   Day: 2   MJD: 55754.000                            

        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 |    66  ---  ---  ---  ---   45  ---  ---  ---  ---    65
   2  |    5   14    7   15    7    4   13    7    6   24    3 |    17   20   21   25   17   18   17   17   21   15    17
   3  |   11   16    7   12   15    6   13   16   10   20    4 |    43   43   40   41   33   42   41   40   52   37    41
   4  |    7   10    8    8   12    4    8    6    8   26    3 |    26   26   28   29   27   26   21   29   26   25    26
   5  |    8   21   10   13   14    5   25    8    5   24    4 |    17   25   21   24   22   17   25   24   18   26    18
   6  |   10   19    7   11   13    4   14    9    8   38    4 |    64   67   65   68   63   65   67   67   71   68    66
   7  |    4   17    9   12   19    4   21    8    9   14    4 |    20   32   24   25   29   20   30   21   19   21    20
   8  |    5   12    9   10   12    5    9    7    7   16    3 |    25   31   27   30   28   26   28   25   25   29    25
   9  |    9   18    8   10   12    5   11    9   10   20    4 |    21   26   24   23   21   20   24   25   23   28    22
  10  |    4   13    6    7   16    4    9    7    6   15    3 |    26   26   30   28   29   27   22   29   26   26    27
  11  |    8   14    5   10   11    4   16    8    8   17    3 |    29   41   35   29   45   31   42   28   31   32    31
  12  |    7   22    9   16   20    5   23    7    7   18    4 |    18   28   24   18   28   17   25   19   21   20    18
  13E |    7   15    9   10   14    3   20   16   10   13    4 |    35   39   38   36   38   36   40   29   36   34    35
  14E |    7   15    9   10   16    4   20   16    8   17    4 |    20   20   18   19   22   16   24   15   18   17    16
  15E |    6   20    9   12   19    6   27    6    5   12    4 |    18   25   21   24   26   20   28   22   18   23    19
  16  |    6   27    7   15   17    7   21   11    6   20    4 |    17   29   17   16   27   16   24   17   22   18    16
  17  |    7   17   10    9   15    5   18    5    6   17    3 |    20   28   17   17   24   18   28   18   18   24    17
  18  |    6   22   12   13   13    4   22    7    8   17    4 |    14   25   18   19   21   13   29   15   15   13    14
  19  |    8   20    6   10   17    4   19   14    6   18    4 |    24   33   24   22   33   21   30   22   25   20    22
  20  |    7   19    8   10   12    5   17    8    8   23    4 |    17   26   18   17   19   14   25   13   16   17    15
  21  |    8   16    8    8   14    5   17   10   10   29    4 |    20   28   26   21   28   21   24   20   19   31    20
  22  |    6   21   12   11   14    5   19    8    9   16    4 |    16   23   18   18   22   16   22   15   18   12    14
  23E |    6   20    8   12   19    6   25   16   15   13    5 |    23   31   23   18   28   20   36   19   23   22    20
  24  |    6   13    6   12   12    6    7    9    6   14    3 |    28   29   29   27   28   27   28   22   21   29    25
  25  |    7   19    8   15   17    4   25    8    7   14    4 |    20   27   25   27   31   20   36   20   20   22    20
  26E |   12   18    8   17   15   11   20   17    9   16    5 |    38   48   44   49   48   41   49   44   42   39    42
  27  |    9   14    6   11   13    5   11   10    9   21    3 |    13   21   19   19   20   17   22   21   19   26    17
  28  |    8   17    9   11   20    4   20    6    5   15    4 |    15   24   18   16   28   16   24   15   17   19    15
  29  |    6   24    8    9   15    3   23    8    8   15    4 |    23   37   21   24   32   24   34   20   22   24    23
 X30  |    9   18   12   12   13    9  ---    9  ---  ---    5 |    18   25   19   18   23   14  ---   17  ---  ---    15
  31  |    5   17    9   12   19    4   17    6    8   26    4 |    20   27   24   24   31   20   26   20   25   24    21
  32  |    8   18    6    8   13    4   15    4    6   16    3 |    18   22   21   16   23   17   23   16   17   22    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   18    8   12   15    5   18   10    8   20      |T   24   30   25   25   28   23   29   23   24   25    24
 WRMS |    7   18    8   11   14    5   17    8    7   19      |NE  24   29   25   24   28   23   28   22   24   25    24
 MEDI |    7   18    8   11   14    5   18    8    8   17      |MD  20   27   24   24   28   20   26   20   21   24    20

Table 3.1644.3   GPS week: 1644   Day: 3   MJD: 55755.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    8   14   11   16   14    4   16    7   10   22    4 |    19   23   23   26   21   20   21   23   27   20    20
   3  |    7   16    6   10   16    6   16    8   10   19    3 |    22   23   21   22   27   20   18   26   20   23    21
   4  |    6   11    7   11   13    5   11    6    6   24    3 |    25   27   29   32   29   28   21   29   30   27    27
   5  |    6   19   10   12   17    6   26   10    7   24    4 |    15   24   17   20   21   16   27   21   22   27    17
   6  |    6   16    8   11   16    5   14    8    9   20    3 |    25   26   26   25   29   23   23   28   28   19    24
   7  |    6   18    9    7   28    5   20    7    6   16    4 |    18   30   23   20   33   17   28   23   22   22    20
   8  |    4   10   10    6   18    4   10    8    6   13    3 |    18   23   21   20   25   19   21   26   23   26    21
   9  |    6   15   10    8   18    3   14    9    9   16    3 |    20   26   22   20   28   19   24   23   21   25    20
  10  |    4   12    7   10   16    4   11    7    7   14    3 |    24   26   23   28   30   25   24   29   29   25    25
  11  |    5   13    6    6   13    6   16    7    7   17    3 |    33   39   36   33   47   34   39   33   32   34    34
  12  |    5   24   10   18   34    5   21    7    8   16    5 |    14   31   18   16   41   16   25   18   21   19    16
  13E |   12   15   11    9   18    5   21   13    7   17    4 |    77   86   87   83   87   82   85   85   85   85    83
  14E |    4   13    9    9   23    4   22   13    9   13    4 |    11   16   16   11   21    9   21   11   13   14    10
  15E |    5   18   10   10   21    4   26    8    6   11    4 |    19   26   24   23   25   19   25   22   26   22    21
  16  |    4   26    8   15   29    7   21   12   10   18    5 |    17   29   20   16   35   16   28   18   15   17    15
  17  |    7   15    6    7   18    5   17    9    8   18    3 |    23   29   17   20   24   17   28   21   18   24    20
  18  |    5   22   11   11   16    4   21    7   11   17    4 |    12   27   12   15   18   10   28   15   16   14    11
  19  |    7   19    6    8   19    4   18   11    8   15    3 |    20   33   23   21   30   19   36   25   20   22    22
  20  |    5   16    8   14   13    5   19    7   10   19    4 |    13   24   18   18   20   12   24   13   16   14    14
  21  |    5   15    7   11   14    5   15   11    9   29    4 |    18   28   24   19   26   19   25   22   19   31    20
  22  |    6   22   12    7   17    5   19    7   10   15    4 |    14   25   18   15   19   13   24   16   15    9    13
  23E |   10   19    6    9   17    6   25   10    6   13    4 |    18   24   22   20   21   16   25   17   19   20    17
  24  |    5   12    6    8   12    6   10    7    8   13    3 |    22   25   24   23   28   22   23   22   26   22    22
  25  |    5   15    9    7   31    4   26    8    8   12    4 |    15   27   22   13   43   17   37   17   21   21    18
  26E |   10   25    9   15   19    6   20   12    9   16    4 |    30   42   34   29   42   29   38   32   32   30    31
  27  |    7   14    7   11   18    3   13   11    8   14    3 |    18   21   24   22   30   18   24   21   18   21    19
  28  |    5   14    9    7   34    5   17    7   10   13    4 |    13   22   16    9   37   11   21   16   17   19    13
  29  |    5   24   10    8   17    5   25    9    9   14    4 |    22   37   20   20   29   21   36   20   23   21    21
 X30  |    9   23   19   14   25   12  ---   11  ---  ---    6 |    14   25   23   18   30   10  ---   16  ---  ---    12
  31  |    6   18    8    9   29    3   17    7    9   24    4 |    16   30   17   22   34   18   26   17   21   19    16
  32  |    7   15    7    8   15    4   12    4    7   14    3 |    14   21   19   16   21   13   22   13   14   19    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    6   17    9   10   20    5   19    9    8   17      |T   20   28   23   22   30   20   28   23   23   23    21
 WRMS |    6   17    9   10   17    5   17    8    7   17      |NE  18   26   21   20   29   18   26   21   21   21    19
 MEDI |    6   16    9    9   18    5   17    8    8   16      |MD  18   26   22   20   29   18   25   21   21   21    20

Table 3.1644.4   GPS week: 1644   Day: 4   MJD: 55756.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    6   16    9   15   12    4   16    8    5   22    4 |    15   21   19   23   18   16   19   21   19   20    17
   3  |    8   13    5   10   21    4   15    7    8   19    3 |    17   18   14   18   27   12   16   19   17   17    14
   4  |    8   10    5    8   18    5   13   12    8   29    4 |    21   23   22   27   27   23   18   29   28   29    23
   5  |    7   20    9   11   17    6   23   10    6   25    4 |    11   22   15   15   18   12   24   16   14   24    12
   6  |   10   15    5   10   21    4   12    8    9   19    4 |    31   30   26   31   36   26   22   32   30   24    28
   7  |    5   20    8    6   36    6   18    8    6   18    4 |    15   31   22   19   37   16   27   21   16   22    18
   8  |    6   11    8    8   28    5    9   11    5   14    3 |    16   27   22   20   32   17   26   25   17   22    19
   9  |    9   12    6    8   29    3   10   10    9   14    3 |    14   20   18   19   35   14   26   18   14   18    16
  10  |    6   12    5    9   17    7   11   11    6   14    3 |    19   24   22   24   26   19   20   26   21   22    21
  11  |    8   15    8   11   14    4   17    7    5   17    3 |    28   39   34   28   41   30   41   31   31   32    30
 X12  |    7   22   13   15  ---    5   26    7    6   15    5 |     9   27   17   15  ---   11   28   14   10   14    12
  13E |   12   14    8    8   20    6   19   10   10   15    4 |    39   45   42   38   41   42   49   40   42   43    40
  14E |    5   12    5   10   41    2   23   16   10   15    4 |    15   20   14   16   36   12   22   16   16   17    13
  15E |    6   20   10   10   21    5   24    9    9   13    4 |    17   20   17   20   24   14   24   20   17   22    16
  16  |    5   25    5   14   40    6   25   12    8   19    5 |    11   26   14    9   40   11   27   11   15   11    10
  17  |    7   15    9   11   23    5   16   13    7   19    4 |    18   24   11   20   22   15   25   19   17   24    15
  18  |    6   22   10    7   20    7   21    8    7   18    4 |    12   27   14   14   17   13   29   14   12   14    11
  19  |    5   21   10   10   23    5   18    9    9   14    4 |    19   33   27   21   29   18   32   21   19   17    20
  20  |    7   14   12   12   16    3   18    6    9   18    4 |    14   20   14   15   18   12   25   12   11   11    12
  21  |    6   15   10    6   17    7   16   11    7   29    4 |    15   25   22   13   25   18   25   20   19   29    17
  22  |    6   20    9    9   19    6   20    7    5   15    3 |    13   22   12   15   18   12   26   15   13   10    11
  23E |    6   21    5   12   19    5   21    8   10   14    4 |    17   28   20   19   20   17   27   18   19   18    18
  24  |    6   13    7   10   12    4    9    7    9   12    3 |    18   21   24   18   24   19   23   18   21   20    19
  25  |    9   15    8    9   37    5   24   10    6   10    4 |    14   28   20   19   50   18   36   19   19   20    18
  26E |   11   17    9   12   23    7   20   18   11   15    5 |    22   32   28   27   38   22   36   31   28   29    25
  27  |    8   11    5   10   32    3   11   13    9   15    4 |    19   27   22   24   39   20   27   25   19   31    22
  28  |    6   16    7    9   46    5   18   12    8   15    4 |     9   20   11   12   46    9   22   18   13   18    11
  29  |    6   24   11   10   17    7   23    9    8   13    4 |    15   32   18   19   24   15   28   16   17   18    16
 X30  |    5   19   13   17   32    9  ---   12  ---  ---    6 |    11   23   16   22   34   10  ---   13  ---  ---    10
  31  |    7   19   12   22   36    4   18    7    7   23    5 |    14   26   24   24   38   15   26   16   15   19    15
  32  |    5   13    4    8   13    4   13    6    8   14    3 |    11   19   15   13   19   12   24   12   15   14    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   17    8   11   25    5   18   10    8   18      |T   16   25   19   19   29   16   26   20   18   20    17
 WRMS |    7   17    8   10   20    5   17   10    6   17      |NE  15   25   19   19   29   15   25   19   17   20    16
 MEDI |    6   15    8   10   21    5   18    9    8   15      |MD  15   25   19   19   27   15   26   19   17   20    16

Table 3.1644.5   GPS week: 1644   Day: 5   MJD: 55757.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    5   13    8   14   14    3   16    9   10   22    4 |    17   22   19   24   21   18   27   22   22   21    18
   3  |    8   12    7   13   22    4   14   13    7   18    4 |    21   24   19   25   30   21   30   27   22   22    20
   4  |    8   10    5    8   18    5   10   10   11   29    4 |    20   22   19   22   25   19   26   28   23   28    20
   5  |    8   20    6   13   17    4   25    9    9   27    4 |    14   27   14   17   19   17   31   20   21   27    15
   6  |    9   14    8   13   21    4   15   11    8   19    4 |    19   22   14   23   27   17   24   26   20   15    17
   7  |    5   19    8   11   34    7   16    6    9   21    4 |    16   31   22   19   39   16   32   21   21   24    18
   8  |    5   14    8   17   27    6   11   16    7   18    4 |    14   25   21   18   31   14   28   22   16   22    15
   9  |   10   12    5    9   26    5   14    9   16   14    4 |    17   22   19   17   33   18   33   17   19   20    17
  10  |    6   12    4    6   18    5    9   12    9   15    3 |    21   28   20   17   25   19   28   27   21   23    21
  11  |   10   13    7    8   16    3   17    8    6   16    3 |    28   36   27   23   38   27   43   27   27   29    27
  12  |    7   21    9   34   41    3   26    9   13   15    6 |    14   28   20   23   45   15   32   19   16   18    14
  13E |    4   15    5   10   22    7   17   11   10   12    3 |    47   55   50   53   54   51   59   51   50   52    50
  14E |    7   10    5   12   50    4   21   14    9   15    4 |    16   17   12   15   34   15   28   14   18   17    12
  15E |    6   18    8   15   20    3   25   10   11   12    4 |    16   22   14   17   22   15   28   19   19   20    14
  16  |    7   21    6   15   39    6   19   12    6   19    4 |    13   24   14   13   42   13   28   17   13   15    12
  17  |    8   19    7   10   20    5   20   16   10   17    4 |    17   27   13   17   21   13   33   20   17   21    15
  18  |    6   22    7   13   19    3   25    9    7   18    4 |    15   28   12   13   17   14   34   16   16   17    13
  19  |    7   21   10   11   23    4   18   10    9   13    4 |    18   35   24   17   27   20   36   22   22   18    20
  20  |    6   15    6   10   14    5   17    6    9   18    3 |    14   21   15   17   18   12   28   14   15   17    13
  21  |    6   13    6   12   13    4   19   10   10   30    4 |    17   27   20   19   21   18   29   23   18   33    19
  22  |    6   20    7   11   20    5   19    8    7   19    4 |    12   23   10   15   18   12   26   15   14   14    10
  23E |    5   17    6   10   17    4   20    7   10   15    3 |    15   23   13   15   14   13   28   14   15   15    13
  24  |    8   11    7    7   13    4    9    7    9   14    3 |    20   21   20   21   21   19   31   19   22   24    19
  25  |    6   18    5   10   39    4   27   13   11   10    4 |    12   27   19   18   48   16   42   16   17   16    15
  26E |   10   15    9   17   17    7   22   22   12   15    5 |    27   36   30   31   38   29   41   39   34   29    29
  27  |    7   15    4   13   28    4   15   11   15   17    4 |    15   20   16   14   33   15   32   18   22   22    16
  28  |    7   15    9    9   43    5   19   14    8   17    4 |    10   22   13   12   43   10   30   18   11   24    11
  29  |    5   24    8   11   19    5   25   10   10   12    4 |    17   35   18   14   24   16   33   18   18   17    17
 X30  |   15   22   12   19   29   10  ---   11  ---  ---    7 |    18   24   16   21   36   14  ---   16  ---  ---    12
  31  |    5   17    9   17   38    4   17    7   14   22    5 |    14   25   18   18   39   14   28   15   16   21    13
  32  |    6   14    4   10   14    3   15    6    6   13    3 |    13   19   18   19   21   14   28   15   16   18    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   17    7   13   26    5   19   11   10   18      |T   17   26   18   19   29   17   31   21   20   21    17
 WRMS |    7   17    7   12   20    5   17   10    8   18      |NE  16   25   17   18   29   16   30   19   18   21    16
 MEDI |    7   15    7   11   20    4   17   10    9   17      |MD  16   24   18   18   27   16   30   19   18   21    16

Table 3.1644.6   GPS week: 1644   Day: 6   MJD: 55758.000                            

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



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 4.1644   GPS week: 1644   MJD: 55752.0-55758.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3003 |U    9     9    22 |U    6     8    27 |U   12    15    27 |
emr | emr 2972 |U   11    10    30 |U   12    22    39 |    13    17    26 |
esa | esa 2976 |    11    11    28 |U    6     6    24 |    11    15    24 |
gfz | gfz 2971 |U   11    10    27 |U   11    20    61 |U   12    16    28 |
grg | grg 2962 |    10     8    24 |U    7     7    29 |    12    18    30 |
igr | igr 2975 |     9     9    23 |     6     6    24 |    11    15    25 |
igs | igs 2946 |     9     8    23 |     6    10    27 |    13    14    28 |
jpl | jpl 2872 |    16    13    39 |U   11    26    46 |    13    16    26 |
mit | mit 2976 |U   12    11    28 |U   11    29    49 |U   18    16    34 |



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 5.1644.0   GPS week: 1644   Day: 0   MJD: 55752.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3051 |    12    11    27 |     7    10    30 |    12    14    36 |
emr | emr 2972 |    15    10    32 |     9    21    32 |    14    13    28 |
esa | esa 2976 |    12     8    24 |     6    10    25 |    12    12    34 |
gfz | gfz 2972 |    10     7    23 |    11    25    58 |    16    14    42 |
grg | grg 2976 |    10     8    25 |     7    10    25 |    14    17    37 |
igr | igr 2976 |    11     9    23 |     6     9    23 |    12    14    34 |
igs | igs 2952 |    11     8    25 |     7    19    38 |    16    13    39 |
jpl | jpl 2871 |    13    13    40 |    12    22    45 |    12    12    28 |
mit | mit 2976 |    20     9    28 |     8    25    51 |    17    22    39 |

Table 5.1644.1   GPS week: 1644   Day: 1   MJD: 55753.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3041 |    11    10    25 |     6     7    29 |     7     8    20 |
emr | emr 2972 |    10     8    26 |    10    22    35 |     9     9    20 |
esa | esa 2976 |    22    18    52 |     6     6    22 |     8     8    21 |
gfz | gfz 2972 |    16    11    23 |    12    21    57 |     8     9    22 |
grg | grg 2976 |    10     6    21 |     6     5    30 |     9     9    23 |
igr | igr 2976 |     8     6    19 |     5     5    23 |     8     8    19 |
igs | igs 2956 |     9     6    18 |     7    22    35 |     7     7    18 |
jpl | jpl 2876 |    42    26    51 |     8    25    42 |     9    10    19 |
mit | mit 2976 |    18    16    46 |     6    16    35 |    29    12    40 |

Table 5.1644.2   GPS week: 1644   Day: 2   MJD: 55754.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3029 |  ----  ----  ---- |  ----  ----  ---- |  ----  ----  ---- |
emr | emr 2972 |    11    10    35 |    13    26    59 |    11    15    27 |
esa | esa 2976 |     9     9    28 |     6     5    22 |     9    11    28 |
gfz | gfz 2971 |    12     9    28 |    10    19    86 |     8    11    30 |
grg | grg 2976 |     9     9    26 |     6     6    25 |    11    15    36 |
igr | igr 2976 |     8     8    25 |     6     4    24 |     8    11    27 |
igs | igs 2949 |     8     7    25 |     6     5    22 |    10    13    33 |
jpl | jpl 2875 |    10    11    33 |    10    26    63 |    10    12    26 |
mit | mit 2976 |     8     7    25 |    12    31    60 |    11    13    31 |

Table 5.1644.3   GPS week: 1644   Day: 3   MJD: 55755.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     7    16 |     6     7    30 |    36    26    55 |
emr | emr 2972 |    10     7    26 |    15    27    38 |    33    31    50 |
esa | esa 2976 |    13    16    20 |     6     5    27 |    26    26    35 |
gfz | gfz 2972 |     7     9    19 |    10    18    76 |    33    29    46 |
grg | grg 2976 |     8     6    19 |     8     6    43 |    24    28    47 |
igr | igr 2976 |    11    14    20 |     7     6    29 |    32    28    44 |
igs | igs 2931 |     7     7    18 |     5     6    29 |    35    27    49 |
jpl | jpl 2876 |    12    10    42 |    10    25    46 |    39    32    40 |
mit | mit 2976 |    11    14    19 |    12    31    46 |    48    22    65 |

Table 5.1644.4   GPS week: 1644   Day: 4   MJD: 55756.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     7     7    18 |     6     6    25 |     6     9    14 |
emr | emr 2972 |     9    10    31 |    14    20    45 |    10     7    14 |
esa | esa 2976 |     7     8    22 |     6     6    28 |     7     8    14 |
gfz | gfz 2973 |     9    13    26 |    10    20    64 |     7     8    14 |
grg | grg 2880 |    10     8    24 |     7     9    27 |    11     8    23 |
igr | igr 2975 |     6     8    20 |     6     7    25 |     7     9    15 |
igs | igs 2936 |     7     8    21 |     6     6    24 |     7     8    15 |
jpl | jpl 2867 |     9     9    32 |    13    30    47 |     8     7    20 |
mit | mit 2976 |     8     7    20 |    13    33    49 |     9     8    19 |

Table 5.1644.5   GPS week: 1644   Day: 5   MJD: 55757.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    10     9    21 |     8     9    26 |     6     8    17 |
emr | emr 2972 |    11    11    27 |    13    15    26 |     8     9    16 |
esa | esa 2976 |     9     7    22 |     8     8    25 |     7     8    17 |
gfz | gfz 2972 |    10    10    26 |    14    21    41 |     9     6    21 |
grg | grg 2976 |    10     7    20 |     9     7    32 |     9     9    22 |
igr | igr 2976 |     9     6    20 |     8     8    24 |     6     7    16 |
igs | igs 2958 |     9     7    21 |     8     7    24 |     6     7    15 |
jpl | jpl 2870 |    15    13    28 |    12    28    39 |     6     7    21 |
mit | mit 2976 |     8     6    22 |    13    36    52 |     6     6    20 |

Table 5.1644.6   GPS week: 1644   Day: 6   MJD: 55758.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     7     8    25 |     4     7    21 |     6    27    19 |
emr | emr 2972 |    13    12    36 |    12    23    37 |     9    33    27 |
esa | esa 2976 |     9    10    32 |     4     6    20 |     7    30    17 |
gfz | gfz 2965 |    11    10    45 |    10    18    45 |     6    34    19 |
grg | grg 2976 |    11    10    31 |     5     5    24 |     8    37    21 |
igr | igr 2976 |     9    10    33 |     5     5    20 |     6    29    18 |
igs | igs 2944 |     9    10    32 |     4     5    19 |     7    25    26 |
jpl | jpl 2869 |    14    11    44 |    10    28    43 |     7    31    26 |
mit | mit 2976 |    15    17    37 |    12    35    52 |    10    26    28 |


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 6.1644   GPS week: 1644   MJD: 55752.500-55758.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      -8     -15      -2     -98     -2 |       6     16
            |      13      11      49      57      7 |       3
emr   uuuuu |      35      -4      55     178     -9 |      25     29
            |      22      20     110     103     11 |       6
esa   uuuuu |      -1     -36       2     -95     -8 |      16     22
            |      19      11      49      97      4 |       4
gfz   uuuuu |     -89      -5      -6    -118     -4 |       7     18
            |      18      25      79      86      6 |       5
grg   uuuux |      66     -29      14    -230    -28 |     -76    118
            |      45      44     139      60    134 |      27
igr   xxxxx |     -39     -18      21     -47     -1 |       4     15
            |      18      14     114      75      3 |       3
irf   xxxxx |      10       6     -32     -11     -5 |       6     17
            |       9       7      59      10      2 |       4
jpl   uuuuu |      -1       5      93      11     13 |       5     16
            |      74      31      67     105      9 |       4
mit   uuuuu |      -2      19    -151      71     -6 |      20     26
            |      12      18      76      28      4 |       3
ngs   uuuuu |       0      11      -3      34     -1 |       9     15
            |      49      30      62     103      4 |       2
sio   uuuuu |      96      81     200     196     -4 |      35     38
            |      12      14     155      39      4 |       4


Table 7.1644.0   GPS week: 1644   Day: 0   MJD: 55752.500

                                                         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     -12     -98    -116      5 |      12     19
emr   uuuuu |      40     -28     136     324     -1 |      35     37
esa   uuuuu |      -3     -48     108    -182     -3 |      23     26
gfz   uuuuu |     -94       2     -52    -116     -1 |      16     23
grg   uuuux |     -15     -84     239    -280    159 |    -116    160
igr   xxxxx |     -23     -21     -57      85      4 |       9     15
irf   xxxxx |       7       8    -104     -15     -5 |      14     19
jpl   uuuuu |     -44      50     155     167      6 |       8     20
mit   uuuuu |     -11      17    -236      37     -6 |      27     30
ngs   uuuuu |      68      27     -91     117      0 |      15     20
sio   uuuuu |      95     107     -23     175     -3 |      42     45

Table 7.1644.1   GPS week: 1644   Day: 1   MJD: 55753.500

                                                         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     -10     -13    -208     -2 |       7     13
emr   uuuuu |      32       0     189     148     -9 |      29     31
esa   uuuuu |     -34     -40     -24    -102    -12 |      19     22
gfz   uuuuu |    -120     -12     -78    -243    -13 |      11     16
grg   uuuux |      96      -6     -37    -118    105 |     -96    150
igr   xxxxx |     -64     -23    -151    -108     -6 |       5     12
irf   xxxxx |       2       2      20      -9     -8 |       9     14
jpl   uuuuu |     -68     -44      53     113      9 |       2     12
mit   uuuuu |     -10       2     -54     110     -8 |      22     25
ngs   uuuuu |      61      40     -45      39      7 |       9     14
sio   uuuuu |      84      78     312     262     -4 |      37     39

Table 7.1644.2   GPS week: 1644   Day: 2   MJD: 55754.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -19      -9      10     -48      6 |       3     15
emr   uuuuu |      66       4     139     319    -19 |      24     29
esa   uuuuu |      -7     -17      -4    -134     -4 |      15     23
gfz   uuuuu |     -87      43     -89    -229      4 |       5     17
grg   uuuux |      46       4     -77    -257     48 |     -65    109
igr   xxxxx |     -37     -39     -32    -137      2 |       1     16
irf   xxxxx |      11      12      40     -20     -2 |       4     17
jpl   uuuuu |     -13     -16      33      15      6 |      -1     13
mit   uuuuu |      10      11     -56      94     -7 |      18     25
ngs   uuuuu |     -12     -42     -34     103     -2 |       7     14
sio   uuuuu |      90      91     383     175      3 |      33     37

Table 7.1644.3   GPS week: 1644   Day: 3   MJD: 55755.500

                                                         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 |     -17     -38      -8    -103     -4 |       6     16
emr   uuuuu |       6     -35      48     119    -15 |      25     29
esa   uuuuu |       2     -41     -44    -219    -15 |      17     24
gfz   uuuuu |     -99       2      37     -83     -4 |       7     18
grg   uuuux |      84     -49      -2    -271    -75 |     -41     76
igr   xxxxx |     -36     -12     163     -89     -2 |       4     16
irf   xxxxx |      19      -7     -41     -27     -8 |       6     17
jpl   uuuuu |     -60      15     160      19     19 |       1     14
mit   uuuuu |      14       1    -192      48     -8 |      19     26
ngs   uuuuu |      15      34      51     155     -6 |       9     15
sio   uuuuu |     114      71     219     226     -6 |      36     39

Table 7.1644.4   GPS week: 1644   Day: 4   MJD: 55756.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      16     -14      11     -60    -11 |       6     16
emr   uuuuu |      21       8    -128     142    -23 |      22     27
esa   uuuuu |      13     -25      -7     -76     -8 |      14     21
gfz   uuuuu |     -68     -15     -40     -70     -7 |       5     17
grg   uuuux |     115     -68      76    -280   -209 |     -48     83
igr   xxxxx |     -37     -12      61     -53      1 |       3     15
irf   xxxxx |      19       4     -29      -5     -6 |       5     17
jpl   uuuuu |      25      11      94     -89     21 |       5     15
mit   uuuuu |       7      14    -135      93     -7 |      18     25
ngs   uuuuu |     -38       5      67       5     -1 |       9     15
sio   uuuuu |     101      67     249     214     -9 |      34     37

Table 7.1644.5   GPS week: 1644   Day: 5   MJD: 55757.500

                                                         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      -7      64     -42    -10 |       5     16
emr   uuuuu |      20       5      26      53     -7 |      20     25
esa   uuuuu |      -3     -46     -12      63     -9 |      13     21
gfz   uuuuu |     -67     -18      62     -22     -8 |       5     17
grg   uuuux |      96     -41      94    -212   -132 |     -73    115
igr   xxxxx |     -61       5       6       5     -1 |       3     15
irf   xxxxx |      -4      11       3      -3     -6 |       4     16
jpl   uuuuu |     146      -5      -3    -134     26 |       8     18
mit   uuuuu |     -19      39    -145      67     -7 |      18     25
ngs   uuuuu |     -57      28     -31    -144     -2 |       9     15
sio   uuuuu |      81      80     263     169     -6 |      33     36

Table 7.1644.6   GPS week: 1644   Day: 6   MJD: 55758.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -21     -11      16    -107      0 |       5     16
emr   uuuuu |      59      20     -28     144     10 |      18     24
esa   uuuuu |      27     -33      -7     -13     -9 |      10     18
gfz   uuuuu |     -88     -39     120     -61      4 |       3     16
grg   uuuux |      44      42    -196    -192    -95 |     -93    131
igr   xxxxx |     -14     -24     154     -30     -1 |       3     15
irf   xxxxx |      14      14    -113       2     -3 |       2     15
jpl   uuuuu |       8      28     158     -15      5 |      12     21
mit   uuuuu |      -1      47    -238      47      2 |      16     23
ngs   uuuuu |     -37     -11      60     -38     -3 |       8     14
sio   uuuuu |     107      71      -5     149     -6 |      32     35



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