[IGSREPORT-20655] Wk 1677 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Thu Mar 15 11:16:09 PDT 2012


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1677   (Feb 26, 2012 - Mar 03, 2012)

Contacts: J. Griffiths (jake.griffiths at noaa.gov)
          K. Choi (kevin.choi 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:

igs1677[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1677[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1677[0-6].cls  IGS GPS clock combination summary report.
igs16777.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16777.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   | 27 MCM4 MCM4
                0  |  ESA   | HYDE TIXI HYDE NNOR TIXI UNSA
                0  |  GFZ   | 5 11 27 DGAR KERG
                0  |  GRG   | USN3
                0  |  MIT   | 9 22 27 9 22 27 CAS1 MAW1 CAS1
                1  |  COD   | CAS1
                1  |  EMR   | 9 27 9 27
                1  |  ESA   | HYDE HYDE KERG NNOR TIXI UNSA
                1  |  GFZ   | 9 11 FAIR SCUB
                1  |  GRG   | NRC1
                1  |  JPL   | 9 27 KARR
                1  |  MIT   | 3 9 11 17 27 28 3 9 11 17 27 28 MAW1 CAS1 KOUC MAW1
                1  |  MIT   | SYOG
                2  |  ALL   | 25
                2  |  COD   | CAS1 KOUC MAW1
                2  |  EMR   | 9 27 9 27
                2  |  ESA   | CAS1 NNOR UNSA
                2  |  GFZ   | 9 11 27 MIZU TSKB
                2  |  GRG   | MAW1 NRC1
                2  |  JPL   | 9 27 CHUR MAW1
                2  |  MIT   | 9 27 9 27
                3  |  COD   | KOUC CAS1 KOUC
                3  |  EMR   | 27 27
                3  |  ESA   | 9 NNOR
                3  |  GFZ   | 9 11 27
                3  |  GRG   | NRC1
                3  |  MIT   | 22 27 22 27 CAS1 GRAZ CAS1 GRAZ
                4  |  COD   | KOUC KOUC
                4  |  EMR   | 9 9 YELL YELL
                4  |  ESA   | MAW1 AREQ MATE MAW1
                4  |  GFZ   | 11 KELY NYAL
                4  |  GRG   | USN3
                4  |  MIT   | 9 18 19 9 18 19 DAV1 SOFI
                5  |  COD   | YELL KOUC RIO2 XMIS YELL
                5  |  EMR   | THTI
                5  |  ESA   | NNOR
                5  |  GFZ   | 11 30 CHUR DAV1 SYOG
                5  |  GRG   | USN3
                5  |  MIT   | SFER
                6  |  COD   | XMIS
                6  |  EMR   | 9 27 9 27 YELL
                6  |  ESA   | NNOR
                6  |  GFZ   | 11 DAV1 DRAO HRAO IRKJ THU3 YSSK
                6  |  GRG   | USN3
                6  |  JPL   | 8 9 27 STJO TIXI
                6  |  MIT   | 1 3 7 8 9 17 19 21 27 1 3 7 8 9 17 19 21 27 CAS1
                6  |  MIT   | DAV1 YELL CAS1 DAV1 PARC STJO TIXI YELL

 5. The following table lists all maneuvered satellites for this week.
    The solutions from COD and ESA, which modeled the maneuver, are used
    that day for combination. An associated accuracy code of 0 (unknown) 
    is given if only one AC is left (no redundancy). For the long arc  
    evaluation the arc is split into two parts at the given maneuver epoch.
    
               PRN |    Date    | Ref. NANU
               ----+------------+----------
               G04 | 2012_03_01 | 2012017 

 6. Velocity changes were estimated to alleviate the effects of modeling
    problems, experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G25 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |

 7. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011
    (GPS Week 1631, day 6, MJD 55667) all IGS products, including the IGS
    combined orbits, are based on the IGS realization of the ITRF2005 reference
    frame (IGS05).   For more information see IGSMAIL #5447.  The IGS05 frame
    is also the basis for the homogeneously reprocessed IGS products from GPS
    Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products,
    are based on the IGS realization of the ITRF2008 reference frame (IGS08).
    For more information see IGSMAIL #6354.
    

 8. Small rotations were applied to all the AC orbit and ERP values in order
    to align them to the current IGS reference frame. These rotations were
    estimated in the IGS SINEX combination process, performed by the IGS Reference
    Frame Coordinator at the Institut Geographique National (IGN). 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  |    -.7     .2   -1.8     -46      8     -4     .26
       EMR  |    6.2   -3.9   13.4      -9     16     -1     .38
       ESA  |    5.8    2.3  -20.4     119   -200    130     .03
       GFZ  |   -1.1     .9   -1.2     -31     22    -17     .16
       GRG  |   -1.9     .8   -7.1     -36     45    -21     .25
       JPL  |     .5    5.4   17.3     -51      3     10     .51
       MIT  |    5.0    1.2    2.4     -37     27    -55     .17
       NGS  |    5.2   -2.4    -.1     -11    -30     35     .35
       SIO  |    6.4   -1.0   14.1     -31   -119     36     .16


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

10. Starting on 27-Feb-2000 (GPS Week 1051-0; MJD 51601) the IGS final products
    are aligned to the IGS reference frame products (station coordinates and
    ERPs as generated by IGN). For more information see IGSMAIL #2750.
    Because of this change in alignment Table 2 has been enhanced with one 
    additional line per AC. This additional line shows the X- and Y-rotations 
    which were applied to each of the AC orbits prior to the orbit combination. 
    These rotations are based on the difference between the individual AC ERP 
    estimates and the IGS reference frame ERP product. The total rotation of
    the individual AC orbits w.r.t. the IGS combined orbit is the sum of the
    values in the two lines of Table 2 plus the reference frame rotation.

11. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011
    (GPS Week 1631, day 6, MJD 55667) the absolute antenna model is introduced
    (IGSMAIL #5438). The antenna phase center offsets and phase center
    variations are given in the file:
        ftp://igs.org/igscb/station/general/igs05.atx
    These antenna calibrations are also used in the homogeneously reprocessed
    IGS products from GPS Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) the absolute antenna
    model is updated (IGSMAIL #6255 & #6374) as given in the file:
        ftp://igs.org/igscb/station/general/igs08.atx
    The JPL solution did not use IGS08/igs08.atx until GPS Week 1649, which
    caused their RMS clock residuals to be higher during that period than for
    the other centres; since GPS Week 1632 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 1.1677.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1677.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 2.1677.[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 3.1677.[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 5.1677.0-6).

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 1677 summary.                       (Feb 26, 2012 - Mar 03, 2012)

Table 1.1677.a   GPS week: 1677   MJD: 55983.000-55989.000

         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  254|    0     0     2    42   -55    -2  -.34    9    9 |    -395    -330     20     77
        |    1     0     0    14    17    14   .04           |     450     776
emr   95|    1    -2     8    38   -95   -51   .39   22   22 |    3109     396     17    116
        |    2     1     2    24    22    12   .05           |     708    1397
esa  134|    0     1     0  -160   214    58   .14    9    9 |   -1263     804     15    137
        |    0     0     1    18    20    14   .03           |    1107    1274
gfz  191|    0    -2    -2     9   -82   -17   .51   12   12 |     -97     280     28     99
        |    0     1     1    66    85    16   .05           |     505     928
grg  123|    0     0    -4    13  -117   -18   .53   15   14 |     -26     -15     49    213
        |    1     1     0    17    12     9   .03           |     329     525
igr  n/a|    0     0     0   -27   -41   -25  -.10    5    5 |    7731     659     20     77
        |    0     0     0    19    21    11   .02           |    1065    1137
jpl  158|    1     0     3    68   -40    22   .50   16   16 |    2328     304     20     98
        |    1     1     1    18    19    28   .03           |     447    1054
mit  263|    0     0    -4    44  -123   -56  -.46   12   11 |    -203     102     21    155
        |    1     0     0    22    37    13   .02           |     290     406
ngs  223|    0     0    -2    15     7     1  -.32   11    8 | -122924  428649   1950   3536
        |    0     0     0    27    56    24   .04           |  730075 1157814
sio  244|    0     0     4    36   194    23  -.30   18   16 |     ---     ---    ---    ---
        |    1     1     1    20    31    13   .02           |     ---     ---


Table 1.1677.b   GPS week : 1677   MJD: 55983.000-55989.000   

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



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 2.1677.0   GPS week: 1677   Day: 0   MJD: 55983.000                            

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  254|    0     0     1    65   -71     0  -.35    9    9 |    -417     -20     16     73
        |                      2   -25                       |
emr   95|    2     0    10    83   -95   -29   .36   23   23 |    3587   -1176     14    109
        |                    -95     6                       |
esa  134|    0     1     1  -128   208    46   .15    8    8 |   -1241    -532     14    154
        |                     12    11                       |
gfz  191|    0     0    -5   -62    13   -26   .44   13   13 |     -89    -496     29     98
        |                     25   -13                       |
grg  123|    0     0    -3    14  -109   -22   .51   15   14 |     286    -450     43    230
        |                    -19   -37                       |
igr  n/a|    0     0    -1    -8   -49   -39  -.09    5    5 |    6755    -378     19     68
        |                    -34    21                       |
jpl  158|    2     0     2    98   -52    21   .51   16   15 |    2614    -800     18     95
        |                    -16   -40                       |
mit  263|   -1     0    -5     7  -166   -27  -.46   13   12 |      -9      41     22    134
        |                      8    35                       |
ngs  223|   -1     0    -1    41   -37    -3  -.31   10    9 |    -446    -132   2128   3326
        |                    -66     2                       |
sio  244|    0    -2     2     9   202    -1  -.31   20   19 |     ---     ---    ---    ---
        |                    -29  -112                       |

Table 2.1677.1   GPS week: 1677   Day: 1   MJD: 55984.000                            

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  254|    1     1     2    49   -52    -2  -.37    9    8 |    -320    -605     20     80
        |                     46   -37                       |
emr   95|    2    -1     8    59   -90   -60   .37   21   21 |    2818    -211     14    115
        |                   -105     0                       |
esa  134|    0     1     0  -163   241    45   .12    7    7 |   -2184    2197     13    127
        |                     -3    -8                       |
gfz  191|   -1    -2    -3    70  -136   -32   .49   11   10 |    -339    1504     29    104
        |                     -5    31                       |
grg  123|    0     0    -2     2  -134   -26   .50   15   14 |    -398     465     60    201
        |                     22   -49                       |
igr  n/a|    1     0     0   -15   -10   -34  -.11    6    6 |    6827     410     20     78
        |                    -56     1                       |
jpl  158|    2     1     1    52   -45    78   .45   16   16 |    2203     -68     19    105
        |                     24    15                       |
mit  263|    0     0    -4    62  -149   -64  -.45   13   12 |    -396      77     20    142
        |                      4    23                       |
ngs  223|    0    -1    -2     9     4   -14  -.28   12    9 | -999999 1596979   2185   3491
        |                    -13     3                       |
sio  244|    0    -2     4    37   161    17  -.27   19   18 |     ---     ---    ---    ---
        |                    -20   -85                       |

Table 2.1677.2   GPS week: 1677   Day: 2   MJD: 55985.000                            

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  254|   -1     1     2    24   -45   -18  -.38   10    9 |     372   -1759     22     78
        |                      2   -16                       |
emr   95|    0    -3    11    22   -67   -48   .30   22   22 |    2998   -1136     15    113
        |                    -46   -16                       |
esa  134|    0     0     0  -186   207    74   .09    9    9 |     633    -712     15    153
        |                     40     9                       |
gfz  191|    0     0    -3    57   -62     5   .52   10   10 |     319    -520     28     91
        |                      5    18                       |
grg  123|    2     2    -4     9  -107     0   .53   15   14 |     402    -693     48    211
        |                     31   -37                       |
igr  n/a|    0     0     0   -50   -37   -23  -.11    5    5 |    7419    -893     20     75
        |                    -33    60                       |
jpl  158|    1    -2     6    43   -28     2   .48   16   15 |    2351   -1007     20    104
        |                     49   -10                       |
mit  263|    1     0    -4    58  -136   -52  -.49   12   11 |      60    -398     19    147
        |                    -25    16                       |
ngs  223|    0     0    -2   -17     8   -26  -.36   12    9 | 1141857 -999999   1999   3894
        |                    -53    26                       |
sio  244|    2     0     3    58   186    30  -.31   17   15 |     ---     ---    ---    ---
        |                    -57   -81                       |

Table 2.1677.3   GPS week: 1677   Day: 3   MJD: 55986.000                            

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  254|    0     1     3    47   -74    14  -.30    9    8 |    -682     417     23     84
        |                    -16     8                       |
emr   95|    2    -4     6    18  -125   -42   .43   21   20 |    2589     397     16    130
        |                    -42    14                       |
esa  134|    0     1     3  -164   196    52   .15    9    9 |    -310     735     12    125
        |                     17    13                       |
gfz  191|    0    -2    -2    56    28     1   .52   12   12 |     553    -859     31    103
        |                    -12    15                       |
grg  123|    0     1    -4    39  -133   -12   .58   15   14 |     -45    -309     44    202
        |                    -12     8                       |
igr  n/a|    0     0     0   -59   -63   -14  -.09    5    5 |    7435     377     20     80
        |                    -57    40                       |
jpl  158|   -1    -1     2    83   -72    33   .53   16   15 |    2289     145     19    117
        |                     22    -2                       |
mit  263|    0     0    -5    21   -59   -68  -.44   11   10 |    -123      55     20    171
        |                      9   -24                       |
ngs  223|    0     0    -3   -13   -69   -15  -.35   11    7 | -999999 2403964   1696   3702
        |                    -79    70                       |
sio  244|    0     0     3    15   244    22  -.30   17   15 |     ---     ---    ---    ---
        |                    -23   -99                       |

Table 2.1677.4   GPS week: 1677   Day: 4   MJD: 55987.000                            

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  254|    0     0     3    24   -44   -23  -.29    9    8 |    -983     439     20     71
        |                      9    -1                       |
emr   95|    0    -1     6    22  -127   -52   .41   21   21 |    2514     507     18    112
        |                    -52    46                       |
esa  134|    0     0    -1  -172   199    62   .19    9    9 |   -2024    1474     14    133
        |                     27    18                       |
gfz  191|    0    -1     0    59  -107   -20   .57   13   13 |    -499     431     28     97
        |                    -12    51                       |
grg  123|    0     1    -4    16  -105   -19   .54   14   16 |      74    -186     52    223
        |                     21   -33                       |
igr  n/a|    0     0     0   -27   -52   -33  -.09    5    5 |    7521     937     21     79
        |                    -45    50                       |
jpl  158|    2     0     4    74   -39    18   .50   18   18 |    1753     657     23     96
        |                     12    -8                       |
mit  263|    1     0    -4    69   -91   -61  -.45   10   10 |    -127    -199     23    177
        |                    -11     0                       |
ngs  223|    0     0    -1    -2     7    44  -.28   11    9 |    -986     498   2045   3475
        |                    -42    48                       |
sio  244|    1     1     5    62   213    22  -.31   17   15 |     ---     ---    ---    ---
        |                    -61   -94                       |

Table 2.1677.5   GPS week: 1677   Day: 5   MJD: 55988.000                            

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  254|   -1     0     3    40   -29    14  -.29    9    8 |    -682     -42     23     67
        |                     29   -15                       |
emr   95|    4    -2     6    22   -81   -67   .44   23   23 |    2760    2284     28    118
        |                    -54    23                       |
esa  134|    1     2    -2  -161   246    45   .16    9    9 |   -2459    2440     26    150
        |                     37   -16                       |
gfz  191|    0    -3    -2   -30  -218   -10   .56   12   12 |    -871    1275     28    101
        |                    -20    14                       |
grg  123|   -1     0    -5   -13  -123   -22   .55   15   14 |    -498     709     50    216
        |                     26   -45                       |
igr  n/a|    0     0     0   -21   -12    -6  -.05    5    4 |    8318    2168     21     81
        |                    -43    68                       |
jpl  158|    3    -1     5    67   -12    -3   .53   17   17 |    1961    1796     22     81
        |                    -26    57                       |
mit  263|    1     0    -3    49  -146   -63  -.44   10    9 |    -776     892     24    135
        |                      1    16                       |
ngs  223|   -1     0    -1    44   109    22  -.29   12    8 |    -785       1   1733   3447
        |                   -164     5                       |
sio  244|    0     1     5    27   149    31  -.29   19   16 |     ---     ---    ---    ---
        |                    -48   -67                       |

Table 2.1677.6   GPS week: 1677   Day: 6   MJD: 55989.000                            

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  254|   -1     0     1    44   -73    -1  -.37   11   10 |     -58    -746     20     87
        |                      2    36                       |
emr   95|    0    -3     8    40   -82   -57   .41   22   22 |    4503    2113     15    121
        |                    -54   -12                       |
esa  134|    0     2     0  -145   203    81   .14    9    9 |   -1259      31     11    123
        |                     38    19                       |
gfz  191|    0    -3     0   -85   -96   -38   .47   13   13 |     243     625     29    104
        |                    -35     2                       |
grg  123|    1     2    -3    28  -111   -27   .51   15   14 |      -9     357     52    208
        |                    -12   -28                       |
igr  n/a|    0     0     0   -11   -60   -25  -.12    6    5 |    9846    1995     21     83
        |                    -39    45                       |
jpl  158|    1    -1     4    62   -35     2   .50   15   15 |    3126    1408     19     90
        |                      4    -6                       |
mit  263|    2     0    -4    42  -115   -57  -.50   13   11 |     -54     249     22    180
        |                      7     5                       |
ngs  223|    0     0    -2    44    29     0  -.37   13    9 |    -110    -763   1865   3422
        |                    -56    82                       |
sio  244|    0     0     5    44   201    41  -.31   20   17 |     ---     ---    ---    ---
        |                    -44  -101                       |

       
       
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 3.1677.0   GPS week: 1677   Day: 0   MJD: 55983.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    9   25    9   11   19    4   13    9    7   16    4 |    39   50   37   40   53   36   46   35   36   42    37
   2  |    9   23   10   15   14    4   12    9   11   16    4 |    25   31   24   30   34   23   30   24   24   25    24
   3  |    9   16    7   11   15    5   11   11    6   11    3 |    18   23   21   21   24   17   27   22   20   19    18
   4  |    8   21    7    9   13    5   13   15   11   18    4 |    15   25   14   11   19   12   21   13   13   15    13
   5  |    8   20   10   34   11    6   17   11   10   26    5 |    30   34   32   47   37   31   35   32   27   33    31
   6  |    9   17    4    9   13    4   10   12    7   13    3 |    20   25   20   21   24   20   30   24   22   22    20
   7E |    7   19    6   15   12    6   21   12    8   17    4 |    32   34   34   34   36   31   38   29   33   31    32
   8  |   11   20    7   11   21    6   11    9    9   24    4 |    78   83   75   78   80   76   85   77   74   84    76
   9E |   18   22   14   14   16    7   20   27   21   16    6 |    97  104  102   98   96   96  106   91   98   94    98
  10  |   10   14    5    9   12    5   11   11    6   17    3 |    30   26   29   35   41   29   31   38   31   30    31
  11E |    8   22   11   11   14    3   10    9    8   22    4 |    22   29   26   29   32   22   30   22   24   24    22
  12  |   11   25    7   10   16    5   17   16   11   21    4 |    21   34   26   32   33   25   32   26   23   26    24
  13  |    7   25   10   11   20    5   18   17   10   12    4 |    29   34   31   26   38   25   36   30   28   26    27
  14  |    8   31    7    8   13    6   11    9    9   16    4 |    23   34   24   29   32   23   31   27   25   29    24
  15  |    8   26   10   14   19    6   19   12   11   25    5 |    30   40   33   33   40   29   40   29   26   33    29
  16  |    7   25    7    9   14    4   17   14   12   29    5 |    29   34   29   33   36   29   36   29   29   29    28
  17  |    7   24    7   15   15    6   21   18   12   14    5 |    34   40   30   28   36   32   43   34   35   33    32
  18  |   11   22    7   17   11    5   14   11   10   28    4 |    30   30   30   40   32   28   32   35   31   36    28
  19  |    5   26    6   13   16    7   16   13    9   27    4 |    27   42   27   31   33   28   39   30   30   32    28
  20  |    9   22    9   14    9    4   16   11   10   23    4 |    35   37   37   37   39   33   41   39   39   35    35
  21  |    8   26    5    9   18    6   12    7   13   22    4 |    21   29   19   22   33   16   24   19   15   23    17
  22  |    9   25    7    9   10    4   15   13   10   26    4 |    36   30   37   41   41   38   37   44   39   40    36
  23  |    5   27    8    8   15    5   17    8    8   21    4 |    32   39   33   29   35   30   40   31   30   27    30
 X24  |    8  ---  ---  ---  ---   33  ---  ---  ---  ---    0 |    27  ---  ---  ---  ---   33  ---  ---  ---  ---    25
  25  |   10   19    7   12   17    6   15   18    7   16    4 |   605   32   31  603   33  605   33  604   27   42   606
 X26  |    6   12    7   11    9    5   13   10    9  ---    3 |    21   19   18   25   26   17   24   19   16  ---    18
 X27E |   14   19    9   11   17    6   15   16   25  ---    6 |    25   30   29   32   41   26   35   30   37  ---    28
  28  |    8   22   10   11   14    5   17   10    9   22    4 |    28   34   27   30   33   25   36   30   28   28    26
  29  |    8   24    8   13   17    4   21   13   11   15    4 |    33   40   30   29   36   31   43   29   32   27    30
  30  |   10   14    5    7   15    6   11   10    7   14    3 |    33   36   33   33   40   31   38   34   34   33    32
  31E |    6   23   10   12   16    4   20   12    6   16    4 |    18   26   19   18   26   17   29   18   18   22    17
  32  |   11   24    9    8   10    4   16   19   10   20    4 |    26   30   30   35   37   31   39   40   33   27    31
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   23    8   13   15    5   16   13   10   20      |T   49   36   31   52   37   48   38   51   31   33    48
 WRMS |    9   23    8   13   14    5   15   12    9   19      |NE  50   33   28   54   34   50   34   53   27   29    50
 MEDI |    8   22    7   11   15    5   15   12   10   18      |MD  29   34   30   32   36   29   36   30   29   29    28

Table 3.1677.1   GPS week: 1677   Day: 1   MJD: 55984.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    9   25    8   12   20    6   11    9   11   17    4 |    33   49   41   42   49   36   48   30   34   44    38
   2  |    9   23    7   12   16    5   14    9    9   13    4 |    16   26   21   28   30   15   23   15   16   16    17
   3  |    8   15    7   10   15    4   14   15   11   12    4 |     8   15   13   15   13   10   18   12   13   11     9
   4  |    7   17    5   11   13    7   14   13   13   15    4 |     9   21   12   11   10    8   15   10   11   13     8
   5  |    7   16    6   11   10    5   18   10   12   23    4 |    19   29   22   29   28   20   31   19   16   23    19
   6  |    8   13    7   10   12    4   13   13    8   11    3 |     9   15   11   14   13    9   19   11   10   11     9
   7E |    8   16    6   12   17    6   22   13    9   16    4 |    18   28   21   23   25   21   27   27   20   27    20
   8  |   10   23    7   11   19    5   15   10   12   26    4 |    81   87   82   83   84   80   87   83   85   79    82
   9E |   19   19   10   20   20    8   18   16   30    9    6 |    75   77   77   76   81   79   77   74   85   74    75
  10  |    9   10    4    8   12    5   12    9    7   11    3 |    23   23   22   28   29   22   26   29   23   25    23
  11E |    5   22    8   10   12    4   14    8   10   13    3 |    16   27   20   26   26   16   25   14   15   18    18
  12  |    8   21    9    9   17    6   19   14   11   19    4 |    15   29   20   26   25   17   29   18   19   19    18
  13  |    6   19    6    9   21    5   16   14   10   10    4 |    14   26   17   18   34   14   28   19   14   16    16
  14  |    8   24    6   10   14    5   11   11   14   19    4 |    14   24   16   23   24   16   21   18   19   21    14
  15  |    8   25   10   14   15    5   18   11   12   21    5 |    23   36   30   37   40   26   35   18   29   21    27
  16  |    7   25    7   11   13    4   20   14    9   24    4 |    20   27   20   24   27   18   28   18   20   18    19
  17  |    7   19    8   14   19    5   21   14   13   14    4 |    21   28   20   25   26   20   28   21   22   20    18
  18  |   10   21    7   17   12    7   14   12   12   25    4 |    17   23   20   31   22   19   23   22   24   26    19
  19  |    6   25   11   12   17    5   19   16   10   19    5 |    18   31   25   22   25   17   30   16   20   20    19
  20  |    8   21    8   12   12    6   15   10    9   23    4 |    19   26   21   25   25   18   28   21   20   22    20
  21  |    7   20    8   11   18    4   14   11   11   19    4 |    15   21   20   21   31   12   20   11   15   14    14
  22  |    9   21    6   10   11    7   13   14   10   25    4 |    23   25   25   28   26   27   25   29   29   28    24
  23  |    5   25    6    9   13    8   16   11    8   20    4 |    16   29   20   21   28   17   27   19   14   21    18
 X24  |    7  ---  ---  ---  ---   23  ---  ---  ---  ---    0 |    17  ---  ---  ---  ---   19  ---  ---  ---  ---    17
 X25  |   13  ---  ---   14  ---   10  ---   17   15  ---    8 |  9999  ---  --- 9999  --- 9999  --- 9999   24  ---  9999
 X26  |   10   13    6   13   10    7   15   11   12  ---    4 |    14   17   14   24   19   12   22   12   14  ---    12
 X27E |   13   19    9   14   41    6   16   21   27  ---    7 |    13   24   19   27   50   20   31   20   38  ---    21
  28  |    7   18    7   11   15    4   17   10   10   24    4 |    18   28   19   22   29   17   27   20   22   17    18
  29  |    8   25    9   10   14    5   20   13    9   14    4 |    21   36   28   27   28   25   35   19   27   21    24
  30  |    7   14    7    9   15    5    9   12    9   10    3 |    23   26   19   23   23   22   27   25   24   24    22
  31E |    9   20    9    8   16    6   21   18    9   21    4 |    10   21   12   14   29    9   24   18   11   23    11
  32  |   11   25    5    8   14    7   15   19    7   25    4 |    23   27   26   31   29   26   31   31   26   25    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   21    7   11   15    6   16   13   12   19      |T   21   30   24   28   30   22   30   23   24   24    22
 WRMS |    8   21    7   10   14    6   16   12    9   18      |NE  18   26   20   24   26   18   27   19   20   20    18
 MEDI |    8   20    7   11   15    5   15   13   10   19      |MD  18   26   20   25   27   18   27   19   20   21    19

Table 3.1677.2   GPS week: 1677   Day: 2   MJD: 55985.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   28   12   10   19    5   11   10   10   15    4 |    35   50   40   44   56   38   48   36   37   48    39
   2  |   11   24    8    9   18    5   16   10   13   12    4 |    20   28   24   28   33   18   25   19   21   18    21
   3  |   10   16    7    9   11    5   11   14    7   10    3 |    12   21   19   20   18   15   22   18   15   16    15
   4  |   10   17    8   10   16    7   11   14   12   17    4 |    15   20   13   16   14   11   15   13   15   12    14
  X5  |    7   17    8   11  ---    7   18    9   10   20    4 |    26   28   26   37  ---   25   29   28   24   28    25
   6  |   10   15    8   10   10    4   12   13    9   10    3 |    11   21   19   19   20   14   23   17   12   18    15
   7E |   10   18    9    9   25    6   22   10    7   10    4 |    19   30   23   26   37   18   30   23   19   20    21
   8E |   15   22    8   10   21    7   13   11   12   18    5 |    44   53   47   49   52   46   51   50   51   49    48
   9E |   17   22   13   11   19    6   18   19   33   16    6 |    46   53   48   44   51   44   50   40   56   43    44
  10  |   11   11    5    8   12    5   10    8    6   10    3 |    26   23   26   29   34   24   24   31   27   24    25
  11E |    8   24    6    7   11    4   12    8   11   13    3 |    24   35   32   35   40   26   35   25   28   32    29
  12  |   12   24    9   12   16    5   17   10   12   23    5 |    19   31   24   32   30   20   29   21   24   21    22
  13  |    7   18    8    9   16    5   16    8    9    9    3 |    20   32   23   25   39   19   32   22   20   18    21
  14  |    7   25    8    9   17    5   13    9   10   16    4 |    16   26   17   25   29   17   23   21   19   21    17
  15  |    9   24   12    9   16    5   15   14    9   17    4 |    32   43   34   39   45   31   38   32   31   32    33
  16  |    9   27    7    9   13    3   18   12    9   24    4 |    21   31   22   28   27   22   29   23   20   24    22
  17  |    6   20   10   12   16    4   18   13   13   11    4 |    25   31   21   26   30   24   31   26   28   26    23
  18  |   12   19    8   17   12    7   15   11    8   24    5 |    20   26   24   39   28   23   23   26   21   27    22
  19  |    8   25    9    9   16    6   19   11    9   19    4 |    18   33   23   27   29   20   31   21   19   23    21
  20  |    9   24   11   13   13    6   18   11    7   27    5 |    23   32   26   33   33   23   30   29   24   28    25
  21  |   11   24   10   12   18    4   13    9   14   14    4 |    15   28   21   24   36   17   22   17   17   13    17
  22  |    9   19   12    8   12    5   14   13    7   22    4 |    27   27   30   36   33   28   26   34   32   31    28
  23  |    8   27    8    8   13    4   17   11    6   17    4 |    21   36   22   27   30   18   30   21   18   17    20
 X24  |    7  ---  ---  ---  ---   20  ---  ---  ---  ---    0 |    22  ---  ---  ---  ---   37  ---  ---  ---  ---    22
 X25  |   41  ---  ---   44  ---   36  ---   20  ---  ---   26 |  9999  ---  --- 9999  --- 9999  --- 9999  ---  ---  9999
  26  |    7   16    9    9   12    6   11   11    9   25    4 |    17   19   18   25   26   15   21   21   13   20    16
 X27E |   11   26   12   10   22    7   15   21   28  ---    6 |    20   29   29   29   40   22   31   26   35  ---    24
  28  |    8   22   12   11   13    5   16    7   12   21    4 |    19   32   20   24   24   19   28   21   20   21    19
  29  |    8   25   10   10   11    4   16   12    9   14    4 |    27   36   28   27   34   25   36   23   25   25    25
  30  |    9   15    6    8   13    5   12   16   13   16    4 |    26   30   28   30   29   29   33   30   32   28    27
  31E |    6   16    8   10   19    7   25   11   12    8    4 |    15   24   20   23   29   17   30   16   16   20    17
  32  |   12   23    7    8   13    7   15   13   10   24    4 |    23   32   27   36   33   27   32   35   28   30    28
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   22    9   10   15    5   16   12   12   17      |T   22   31   25   30   33   23   30   25   24   25    24
 WRMS |    9   22    9   10   14    5   15   11    9   15      |NE  21   29   23   29   30   22   28   24   22   23    22
 MEDI |    9   22    8   10   16    5   15   11   10   16      |MD  21   30   24   28   33   22   30   23   21   24    22

Table 3.1677.3   GPS week: 1677   Day: 3   MJD: 55986.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |    6   27   13  ---   21    7   11   10    8  ---    5 |    37   51   39  ---   54   39   51   34   34  ---    38
   2  |    8   23    6   14   16    5   13   12   11   12    4 |    26   35   27   31   38   24   30   23   24   23    25
   3  |    8   13    7   10   11    4   12   11    8    7    3 |    15   24   15   18   19   15   27   19   16   14    15
   4  |    7   22    9   11   14    7   13   17   12   16    4 |    19   28   18   14   21   18   23   13   18   16    16
   5  |    7   17    9   14   13    4   18    9    8   20    4 |    27   35   25   36   39   28   35   31   29   30    28
   6  |    8   12    7    9   13    3   13   12    7    8    3 |    16   25   19   20   22   17   29   20   19   15    17
   7E |    7   13   10   12   13    5   20    9    9   10    4 |    20   29   21   24   29   16   29   21   19   18    19
   8E |   14   20   12   12   20    5   15    9   11   20    5 |    89   88   87   85   84   85   86   91   93   88    88
   9E |   16   19   11   14   20    6   17   25   34   14    7 |    60   67   62   63   69   62   69   66   68   60    62
  10  |    9   10    8   10   13    4    8    9    7   10    3 |    31   33   28   38   38   31   33   35   37   30    32
  11E |    7   21    7   11   11    3   11    9   10   18    4 |    23   33   23   29   34   23   34   21   23   32    23
  12  |   10   24   10   12   15    6   17    7   11   21    4 |    21   30   24   31   33   23   32   20   21   19    21
  13  |    6   18   11   13   36    6   13    7   12   10    5 |    21   33   22   24   45   19   31   23   23   19    20
  14  |    7   24    8   12   15    5   12    9   10   15    4 |    17   29   18   28   29   17   26   22   19   20    18
  15  |    9   21   10   12   15    5   18   12    8   17    4 |    29   43   31   36   42   29   41   34   28   27    30
  16  |    9   25   10    9   14    5   19   10    8   24    4 |    25   34   27   29   32   25   34   26   24   25    24
  17  |    8   41    6   14   14    6   22    8    6   11    5 |    28   50   20   22   30   24   36   27   29   26    23
  18  |   10   20    8   21   12    7   15   11   10   24    5 |    24   28   22   40   27   25   28   28   26   24    22
  19  |    5   27    7   13   16    4   20   10   12   17    4 |    23   41   20   25   29   21   37   25   25   25    23
  20  |    8   21   11   20   11    5   16   10    7   27    5 |    22   34   23   39   30   25   33   29   28   31    25
  21  |    7   21    7    9   19    4   14    7   10   11    4 |    18   28   21   24   35   17   26   16   18   14    18
  22  |    9   20   12    8    9    7   17   15   11   20    4 |    25   28   29   31   33   29   30   34   28   28    26
  23  |    6   23    7   10   13    5   17    8    5   16    4 |    22   33   24   26   33   21   32   23   22   22    22
 X24  |    7  ---  ---  ---  ---   31  ---  ---  ---  ---    0 |    24  ---  ---  ---  ---   26  ---  ---  ---  ---    23
 X25  |   12   15   11   10   17    6   15   13   12  ---    5 |   520   27   25  520   24  522   25  520   22  ---   522
  26  |    8   12    5    9   11    4   12   11    6   26    3 |    20   24   18   20   27   17   23   19   19   19    16
 X27E |    9   20    9   11   18    5   17   21   28  ---    6 |    20   31   20   28   37   22   32   22   37  ---    21
  28  |    7   21    8   10   13    5   18   10   10   19    4 |    25   33   24   26   29   24   31   27   26   23    22
  29  |    8   23    7   13   12    3   17   11    6   13    4 |    26   36   23   28   29   23   34   23   27   22    24
  30  |   10   12    8   11   13    4   11    8    8    9    3 |    20   27   20   21   27   18   26   21   20   17    18
  31E |    7   24   10   13   18    4   20   10    8   14    4 |    17   31   19   23   29   18   28   18   18   18    17
  32  |   10   22    7   10   12    6   14    9    5   24    4 |    29   38   31   40   41   33   39   35   35   33    33
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   21    9   12   15    5   16   11   11   17      |T   41   35   26   47   35   41   34   44   28   26    41
 WRMS |    8   20    9   12   14    5   15   10    7   15      |NE  43   33   23   49   32   43   31   46   24   22    43
 MEDI |    8   21    8   11   14    5   15   10    9   16      |MD  23   33   23   28   32   23   32   23   24   23    23

Table 3.1677.4   GPS week: 1677   Day: 4   MJD: 55987.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |    7   26    8   14   23    5  ---    9    9   19    5 |    29   45   35   42   49   30  ---   28   31   41    33
   2  |    7   23    9   14   14    4   15   12   11   11    4 |    18   27   24   29   31   17   24   18   19   19    19
   3  |    7   15    8   12   12    4   12   10   11    7    3 |     8   19   15   19   17   10   20   12   12   10    10
  X4  |    6  ---  ---  ---  ---   37  ---  ---  ---  ---    0 |    12  ---  ---  ---  ---   66  ---  ---  ---  ---    12
   5  |    7   16    6   13   13    5   21    9   10   20    4 |    15   25   21   29   30   18   26   21   21   25    19
   6  |    8   15    6   13   12    4   13   10    8    9    3 |    10   23   14   22   17   11   24   14   15   13    12
   7E |    8   21    7   10   17    6   21    9    9   10    4 |    13   28   13   18   22   11   23   13   14   11    11
   8E |   18   24   10   13   21    7   19   12   15   21    5 |    50   54   46   45   48   51   51   50   50   54    47
   9E |   16   18   12   16   17    6   20   14   32   14    6 |    34   44   39   41   43   37   47   40   46   38    37
  10  |    8   14    9   13   12    6   14   11    9    9    3 |    18   22   21   29   31   21   23   26   20   22    21
  11E |    7   20    7    9   13    5   13    8    7   17    3 |    14   27   20   25   26   17   27   17   17   26    18
  12  |    9   21   11   11   15    6   19    7    8   22    4 |    16   29   22   30   29   19   26   16   21   22    18
  13  |    7   21    8   13   22    5   21    9   11   12    4 |    16   29   21   22   34   16   32   20   21   18    18
  14  |    8   23    8   13   16    5   17   11    9   16    4 |    14   23   15   26   27   15   23   20   15   19    15
  15  |    8   23   13   14   17    4   23   11   10   19    5 |    31   43   35   40   46   32   40   27   31   32    32
  16  |    7   25    8   12   12    4   19   12    9   25    4 |    19   28   21   30   27   17   27   19   21   17    18
  17  |    6   21   10   13   18    3   17    6   15   12    4 |    24   32   23   25   26   20   30   25   27   25    22
  18  |   11   21    9   18   11    6   21   10    9   25    5 |    17   25   19   33   23   18   24   25   20   27    18
  19  |    7   28    9   12   14    5   21   10    9   17    4 |    19   35   20   20   30   18   32   17   21   20    19
  20  |    8   23    8   14   10    7   16   10   11   27    4 |    16   27   24   30   26   22   29   24   23   27    21
 X21  |    9  ---    9   15   18    6   16    8   11   10    4 |    11  ---   18   21   32   12   22   13   10   12    12
  22  |   11   21    9   11   10    5   18   12    9   18    4 |    22   24   25   26   29   24   26   30   30   22    23
  23  |    8   26    8   12   14    4   20   10    8   17    4 |    15   30   21   23   29   15   30   19   16   15    17
 X24  |    6  ---  ---  ---  ---   31  ---  ---  ---  ---    0 |    20  ---  ---  ---  ---   23  ---  ---  ---  ---    19
 X25  |    9   14    6   11   18    4   17   12   12  ---    4 |   318   15   10  317   12  317   13  316    9  ---   318
  26  |    9   14    6   14   10    5   18   10   11   19    4 |    12   18   14   21   22   11   19   14   12   18    11
 X27E |   10   18   11   12   20    4   18   18   25  ---    6 |    17   26   21   26   35   17   26   19   29  ---    18
  28  |    6   19    8   14   15    4   19    9   12   20    4 |    22   27   19   26   26   19   29   25   27   22    20
  29  |    7   22    8   13   13    4   21   11    7   14    4 |    18   30   19   23   24   17   28   17   17   20    17
  30  |    8   12    8   11   10    5   12   11    7    6    3 |    10   21   14   19   18   13   19   17   17   12    13
  31E |    6   24   10   10   14    5   21   10    9   15    4 |    11   23   15   19   23   14   25   18   18   23    14
  32  |    9   18    9   11   12    7   13    7    9   25    4 |    19   26   27   32   32   23   32   25   23   20    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   21    9   13   14    5   18   10   11   17      |T   27   28   21   36   28   30   27   31   21   22    28
 WRMS |    8   21    9   13   16    5   18   10    9   15      |NE  29   27   20   39   27   32   26   33   20   20    30
 MEDI |    8   21    8   13   14    5   18   10    9   17      |MD  17   27   21   26   27   18   26   19   20   20    18

Table 3.1677.5   GPS week: 1677   Day: 5   MJD: 55988.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   29   12   15   15    5   12   13   10   21    5 |    31   51   36   41   46   31   43   28   31   41    34
   2  |    8   22    8   14   19    5   15   12   13   12    4 |    16   26   21   29   29   17   22   16   20   16    18
   3  |    9   15    9   11   11    5   16    9    8    8    3 |    12   19   18   19   16   15   20   16   17   14    14
  X4  |    7  ---    9    9  ---    9  ---   13   13   18    5 |    12  ---   13   11  ---   11  ---   13   12   12    11
   5  |    7   19   10   14   12    4   21    9   12   21    4 |    18   28   25   30   27   20   26   22   19   22    20
   6  |    8   16    8    9   11    4   14   10    6   10    3 |    14   22   18   19   17   16   23   17   17   16    15
   7E |    6   22    8   11   14    4   20   11    7   10    4 |    16   26   21   16   20   16   25   15   17   15    16
   8E |   18   29   11   13   23   11   20   16   16   20    6 |    90   90   87   88   87   91   89   90   89   88    87
   9E |   15   24   13   15   19    5   20   10   31   14    6 |    50   61   53   54   57   54   62   52   64   53    54
  10  |    7   17    7   12   15    6   13    8    9   13    3 |    20   21   25   25   26   19   22   23   23   20    21
  11E |    7   22    8   10   13    2   16    9   15   20    4 |    21   36   26   28   33   21   30   22   23   31    23
  12  |   10   25   10   10   18    6   20    5   14   20    4 |    15   28   20   28   28   20   29   13   22   18    18
  13  |    6   23    8   11   18    4   17    8    9   12    4 |    20   33   25   24   34   19   32   19   22   22    21
  14  |    8   28   10   11   15    4   15   11   11   17    4 |    17   23   20   26   28   19   25   21   23   18    18
  15  |    7   22   11   14   17    4   20    8   12   25    5 |    24   34   29   35   39   28   35   20   28   32    27
  16  |    8   26    7   12   12    3   20    9    8   25    4 |    22   31   24   29   27   23   29   22   24   21    22
  17  |    7   25   12   14   17    3   17    8   12   14    4 |    22   29   19   20   22   18   25   21   20   23    18
  18  |   11   26   10   18   15    6   18   11   10   29    5 |    17   28   21   33   24   18   25   21   21   25    18
  19  |    7   27   10   13   14    3   18    9   10   17    4 |    18   31   17   21   28   17   29   18   21   19    18
  20  |    8   22   10   12   10    5   17   10    8   31    4 |    20   30   27   30   27   22   29   23   24   29    23
  21  |    7   31    9   13   23    5   17    7    8   12    4 |    12   32   22   25   32   16   22   12   16   12    15
  22  |    9   22   12   11   12    5   16   17    7   21    4 |    21   27   27   27   28   24   28   27   27   23    23
  23  |    6   26    7    9   13    4   18    8    7   18    4 |    22   34   26   26   30   21   32   22   18   19    22
 X24  |    6  ---  ---  ---  ---   31  ---  ---  ---  ---    0 |    20  ---  ---  ---  ---   27  ---  ---  ---  ---    20
  25  |    8   19    8    8   19    3   16   11   11   12    4 |   356   21   19  358   20  357   21  356   26   11   358
  26  |    8   17    9   14   15    5   15   11   13   21    4 |    11   17   16   20   21   12   17   13   15   17    12
 X27E |   11   22   10   10   22    6   17   15   24  ---    6 |    13   27   18   27   35   16   28   20   29  ---    18
  28  |    8   24   10   10   14    4   16   14   11   23    4 |    18   29   21   22   26   18   26   26   22   20    19
  29  |    7   26    6   13   16    4   20    9   11   14    4 |    18   33   22   24   24   20   29   19   22   20    19
  30  |    8   16    8    9   14    4   12    7    9    9    3 |    15   22   18   20   17   17   23   16   18   15    16
  31E |    6   22   11   12   17    3   21    6   11   14    4 |    20   30   23   23   29   21   28   23   25   28    23
  32  |    9   21    8   10    8    5   14    7   10   26    4 |    22   28   28   31   31   27   31   27   26   25    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   23    9   12   15    5   17   10   12   19      |T   31   31   25   39   30   33   30   33   25   24    33
 WRMS |    8   23    9   12   14    4   17    9    8   16      |NE  31   28   22   39   26   33   27   33   21   20    33
 MEDI |    8   22    9   12   15    4   17    9   11   17      |MD  18   28   22   26   28   19   28   21   22   20    19

Table 3.1677.6   GPS week: 1677   Day: 6   MJD: 55989.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   17   24   10   16   15    5   14   20   11   21    5 |    48   62   51   48   58   46   58   44   45   54    49
   2E |   11   26    7   11   22    6   14   17   12   14    5 |    31   37   34   36   41   27   34   33   27   29    31
   3  |   11   20    7   13   14    5   11   12    6    9    4 |    15   26   16   22   20   15   25   18   14   15    15
   4  |    9   27    8   10   13    7   16   15   11   17    4 |    17   26   15   13   11   15   15   15   14   14    15
   5  |    7   19    8   12   10    4   17   11    9   23    4 |    29   34   29   38   38   29   35   33   29   34    29
   6  |   10   19    8   12   10    4   11   12    6   12    3 |    15   22   16   22   19   15   23   18   15   17    15
   7E |    6   18    9    9   14    6   17    9    9   10    3 |    16   26   19   21   26   15   25   19   19   17    18
   8E |   18   22   11   14   21   12   17   21   20   24    6 |    98   97   96   90   94   91   96  106  100  103    97
   9E |   16   23   13   15   18    7   18   11   36   17    7 |    42   52   44   50   49   44   53   45   60   47    45
  10  |    8   13    5   12   11    5   10    9   11   16    3 |    33   30   32   40   40   31   31   39   30   39    33
  11E |   11   20    9   13   12    5   14   17   14   20    5 |    25   42   31   34   41   27   37   31   29   38    30
  12  |   12   25   10   11   18    7   17    8   14   20    5 |    19   36   24   35   36   23   33   21   23   25    24
  13  |    6   21    8   13   15    5   14    9   10   13    4 |    20   36   22   26   36   19   34   21   20   24    22
  14  |    9   25   11   15   13    4   15   13   14   17    5 |    21   27   20   31   30   20   26   25   21   23    21
  15  |    7   23    9   17   15    5   18   10   13   26    5 |    33   43   35   40   43   31   41   35   26   31    32
  16  |   10   24    8   15   13    5   18   10    9   26    5 |    25   29   26   31   29   24   30   27   26   24    24
  17  |    9   22   11   16   15    4   16   12   10   23    5 |    27   36   26   24   33   24   32   30   23   31    25
  18  |   10   23    8   18   11    6   16   14    9   35    5 |    26   30   30   42   34   28   32   33   28   34    28
  19  |    8   27   12   15   17    5   16   11    7   16    4 |    24   40   22   27   35   22   36   24   22   23    24
  20  |   12   23   10   21   12    6   16   16   13   32    5 |    25   33   32   38   35   29   35   33   30   36    29
  21  |    8   24    7   15   20    6   12   11    8   15    4 |    23   30   25   30   35   21   30   21   18   25    23
  22  |    9   22   11   12   12    6   15   17   11   24    5 |    31   30   37   40   40   35   33   38   38   36    33
  23  |    8   25    7   14   10    5   18    9    6   18    4 |    21   36   26   26   33   20   33   22   20   19    23
 X24  |    8  ---  ---  ---  ---   21  ---  ---  ---  ---    0 |    29  ---  ---  ---  ---   26  ---  ---  ---  ---    28
  25  |   10   18    8   11   15    4   16   13   14   12    4 |   292   50   47  293   47  292   50  291   51   37   292
  26  |   12   14    9   11   14    7   12    9   13   20    4 |    25   23   19   23   23   17   25   22   16   19    19
 X27E |   12   23   10   10   17    6   14   17   29  ---    6 |    22   30   22   28   34   21   32   24   37  ---    23
  28  |   10   20   10    8   14    5   16   13   14   23    4 |    25   33   27   30   37   25   32   34   27   27    27
  29  |   11   22    8   13   16    4   17   11    9   17    4 |    28   39   30   32   36   26   40   27   27   31    28
  30  |    9   13    6   11   13    5   10    9   10   12    3 |    17   21   17   24   22   15   23   19   22   18    17
  31E |   10   19    9   13   18    5   19    9   10   12    4 |    15   24   19   26   28   15   25   17   18   17    17
  32  |   13   21    8   11   11    5   15   11   13   30    5 |    29   35   34   39   37   31   38   34   30   41    32
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   22    9   13   15    6   15   13   13   20      |T   35   35   29   41   36   34   35   38   29   30    36
 WRMS |   10   22    9   13   14    5   15   11    9   17      |NE  35   33   27   42   33   35   32   38   25   28    36
 MEDI |   10   22    9   13   14    5   16   11   11   17      |MD  25   33   26   31   35   24   33   27   26   27    25



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 4.1677   GPS week: 1677   MJD: 55983.0-55989.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2937 |U  103    89   268 |U   14    15    43 |U   11    19    61 |
emr | emr 2829 |   110    92   303 |U   15    16    45 |    18    28    69 |
esa | esa 2866 |   102    87   267 |U   13    13    46 |    14    18    57 |
gfz | gfz 2840 |U  106    89   283 |U   16    17    53 |U   18    24    72 |
grg | grg 2837 |    29    26    85 |U   15    17    48 |    18    27    71 |
igr | igr 2866 |   104    88   267 |    14    15    44 |    13    19    63 |
igs | igs 2850 |   102    87   265 |    14    15    46 |    12    20    62 |
jpl | jpl 2828 |   107    90   284 |U   14    16    44 |U   15    22    50 |
mit | mit 2866 |   105    90   280 |U   33    33    96 |U   20    27    56 |



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 5.1677.0   GPS week: 1677   Day: 0   MJD: 55983.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2944 |     5     4    12 |    12    16    32 |     5     6    14 |
emr | emr 2872 |     8     6    12 |    13    19    39 |     8    11    27 |
esa | esa 2880 |     7     6    17 |    11    13    34 |     5     6    16 |
gfz | gfz 2871 |     9     6    18 |    13    18    43 |     6     8    17 |
grg | grg 2880 |     6     6    27 |    11    13    41 |     7     7    19 |
igr | igr 2880 |     7     5    16 |    11    14    37 |     5     5    14 |
igs | igs 2878 |     5     4    16 |    10    15    34 |     5     6    16 |
jpl | jpl 2871 |     5     4    13 |    11    16    33 |     7     8    19 |
mit | mit 2880 |     8     5    24 |    12    17    34 |    11    10    32 |

Table 5.1677.1   GPS week: 1677   Day: 1   MJD: 55984.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2967 |   653   562  1754 |    19    20    52 |     7     9    14 |
emr | emr 2872 |   645   559  1738 |    21    22    52 |    10    12    29 |
esa | esa 2880 |   644   553  1729 |    18    20    53 |     7     6    17 |
gfz | gfz 2872 |   646   552  1732 |    20    23    59 |     8     7    18 |
grg | grg 2880 |    65    94   169 |    19    21    48 |     9    11    28 |
igr | igr 2880 |   646   553  1730 |    18    21    49 |     7     5    17 |
igs | igs 2847 |   646   554  1726 |    19    21    56 |     6     5    15 |
jpl | jpl 2872 |   649   555  1730 |    19    20    53 |     8     9    26 |
mit | mit 2880 |   650   559  1734 |   142   148   380 |    25    14    46 |

Table 5.1677.2   GPS week: 1677   Day: 2   MJD: 55985.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2945 |    10    21    53 |    21    19    58 |  ----  ----  ---- |
emr | emr 2872 |    11    21    56 |    21    22    49 |    37    42    43 |
esa | esa 2880 |    10    19    54 |    20    20    51 |    15    15    24 |
gfz | gfz 2870 |    13    20    58 |    22    19    53 |  ----  ----  ---- |
grg | grg 2784 |    13    13    35 |    18    22    58 |  ----  ----  ---- |
igr | igr 2880 |    10    19    54 |    20    20    50 |  ----  ----  ---- |
igs | igs 2849 |     9    19    53 |    20    19    54 |  ----  ----  ---- |
jpl | jpl 2871 |    13    21    56 |    20    19    51 |    32    34    35 |
mit | mit 2880 |    15    14    46 |    25    22    78 |    33    28    45 |

Table 5.1677.3   GPS week: 1677   Day: 3   MJD: 55986.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2946 |     4     6    11 |     9     9    34 |    12    19   119 |
emr | emr 2872 |    11     6    23 |    13    13    45 |    16    36   132 |
esa | esa 2880 |     6     6    17 |     9    11    39 |    21    20   137 |
gfz | gfz 2771 |    13     9    21 |    12    16    56 |    21    21   149 |
grg | grg 2880 |    16     9    33 |    11    11    42 |    18    50   123 |
igr | igr 2880 |     6     6    15 |     9    10    37 |    17    22   129 |
igs | igs 2837 |     5     5    16 |     9    11    37 |    14    27   129 |
jpl | jpl 2872 |    14     8    17 |     9    12    41 |     6    11    20 |
mit | mit 2880 |    10     8    34 |     9    10    37 |     7    38    28 |

Table 5.1677.4   GPS week: 1677   Day: 4   MJD: 55987.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2852 |    39    17    15 |    25    21    79 |    15     9    23 |
emr | emr 2678 |    42    18    64 |    20    15    80 |    30    12    36 |
esa | esa 2784 |    38    12    24 |    18    15    93 |    19    13    27 |
gfz | gfz 2763 |    39    18    81 |    30    23   100 |    31    26    38 |
grg | grg 2775 |    41    19    81 |    28    29    82 |    27    13    38 |
igr | igr 2784 |    38    16    21 |    27    21    86 |    21    12    25 |
igs | igs 2784 |    38    16    18 |    26    20    93 |    23    12    27 |
jpl | jpl 2678 |    45    24   118 |    25    20    80 |    30    14    37 |
mit | mit 2784 |    38    24    60 |    26    21    94 |    33    14    41 |

Table 5.1677.5   GPS week: 1677   Day: 5   MJD: 55988.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2950 |     6     6    14 |     8    10    23 |     7     6    19 |
emr | emr 2772 |    39    25   204 |     9    12    27 |    10    11    28 |
esa | esa 2880 |     7     8    18 |     8     9    24 |     8     8    21 |
gfz | gfz 2866 |    16    10    56 |     9     9    34 |    11    18    41 |
grg | grg 2781 |    42    28   178 |    10    11    34 |    12     9    31 |
igr | igr 2880 |     9    10    17 |     8     8    25 |     8     7    19 |
igs | igs 2878 |     7     7    13 |     9    10    23 |     9     8    19 |
jpl | jpl 2770 |    15    11    31 |     8    13    26 |    10    12    37 |
mit | mit 2880 |     7     9    28 |     9     8    23 |    10     9    21 |

Table 5.1677.6   GPS week: 1677   Day: 6   MJD: 55989.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2959 |     8     5    16 |     6     7    26 |    19    65   175 |
emr | emr 2868 |    12     8    25 |     7     7    25 |    17    69   190 |
esa | esa 2880 |     5     5    13 |     7     6    26 |    21    59   158 |
gfz | gfz 2868 |     7     5    15 |     7     8    30 |    31    65   170 |
grg | grg 2880 |    20    17    71 |     9    11    32 |    34    72   186 |
igr | igr 2879 |    10     6    18 |     7     8    22 |    20    62   173 |
igs | igs 2877 |     6     4    13 |     7     6    24 |    16    63   168 |
jpl | jpl 2868 |    10     7    22 |     6     9    24 |    16    68   176 |
mit | mit 2880 |     9     8    32 |     9     8    28 |    22    79   181 |


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    : 10-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 6.1677   GPS week: 1677   MJD: 55983.500-55989.500

                                                         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     -23     124     163     -6 |       9     21
            |      20      23     141      72      4 |       2
emr   uuuuu |      -8      52    -163     174      4 |      51     54
            |      20      27     177     149      7 |       5
esa   uuuuu |      -6     -36      66    -251     -3 |       0     15
            |      12      19      58      80      4 |       2
gfz   uuuuu |     -16      -4      -9      45      7 |      16     25
            |      18      19      62      91      3 |       5
grg   uuuux |      32     -20       9      16     -8 |       2     36
            |      17      22      67      41     14 |       3
igr   xxxxx |     -40      32      20     -52      0 |       9     19
            |      21      12      44      47      3 |       3
irf   xxxxx |       1     -12     -32     -17    -11 |       9     25
            |       6       8      15      29      5 |       2
jpl   uuuuu |       0     -22     121     183      4 |      36     42
            |      29      19      96      50      7 |       4
mit   uuuuu |      -9     -11    -187      44     -3 |      14     22
            |      24      18      52      55      2 |       2
ngs   uuuuu |     -33      56      38      89     -8 |      12     26
            |      29      40      87     112      5 |       2
sio   uuuuu |      92      28     126     -62      8 |      26     32
            |      16      19      36      80      9 |       6


Table 7.1677.0   GPS week: 1677   Day: 0   MJD: 55983.500

                                                         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 |      15     -17      40     262     -8 |      10     22
emr   uuuuu |     -16      80    -433       3     10 |      45     50
esa   uuuuu |     -21     -27      55    -163     -6 |       1     16
gfz   uuuuu |       3     -40       9      68      4 |      12     24
grg   uuuux |      27       4     -65     -18    -33 |       8     36
igr   xxxxx |     -31      19      91    -115     -2 |       8     20
irf   xxxxx |     -10     -15     -26     -55    -14 |      13     28
jpl   uuuuu |      30       1      46     169      3 |      32     40
mit   uuuuu |     -45     -23    -104       9     -2 |      14     24
ngs   uuuuu |     -12      51      99     133     -9 |      14     29
sio   uuuuu |     102      14      97    -162     19 |      19     27

Table 7.1677.1   GPS week: 1677   Day: 1   MJD: 55984.500

                                                         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 |      34     -52      23     156    -11 |       7     21
emr   uuuuu |      -3      99    -318     174      5 |      45     50
esa   uuuuu |       5      -3     -29    -139     -7 |      -1     16
gfz   uuuuu |     -34      -1      30      39      6 |      11     23
grg   uuuux |      46     -28      65     -32    -16 |       3     37
igr   xxxxx |      -4      50      11     -45      4 |       6     19
irf   xxxxx |      -3      -6     -39      17     -8 |       8     25
jpl   uuuuu |     -18     -30     209     113      2 |      31     39
mit   uuuuu |     -26     -10    -158     150     -3 |      12     22
ngs   uuuuu |      -6       7      64     -83     -2 |      10     26
sio   uuuuu |      82      14     124      26     19 |      19     28

Table 7.1677.2   GPS week: 1677   Day: 2   MJD: 55985.500

                                                         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 |      15      -4     330     156     -6 |       9     20
emr   uuuuu |      15      44    -156     272      9 |      48     52
esa   uuuuu |     -10     -42      72    -304     -8 |      -1     16
gfz   uuuuu |     -19      -7     -34     179     12 |      14     23
grg   uuuux |      36     -33     129      10      8 |       2     37
igr   xxxxx |     -61      31      -7      28     -3 |       8     18
irf   xxxxx |      -1      -2      -9      -1    -10 |       8     25
jpl   uuuuu |       9     -51      53     135     14 |      34     40
mit   uuuuu |     -17      23    -159      11     -1 |      13     22
ngs   uuuuu |     -27      51     -26      42     -8 |      11     26
sio   uuuuu |      80      55     137    -118     10 |      24     30

Table 7.1677.3   GPS week: 1677   Day: 3   MJD: 55986.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      -3       3     100     183     -1 |       8     20
emr   uuuuu |      -9      29    -196       4     12 |      50     53
esa   uuuuu |      -8     -30      44    -203     -2 |      -2     16
gfz   uuuuu |     -10      -1      85      80      6 |      14     23
grg   uuuux |      -3      -1     -43      10      0 |       0     36
igr   xxxxx |     -35      44      72     -44      0 |       7     18
irf   xxxxx |       5     -13     -30      -9    -14 |       8     25
jpl   uuuuu |       7     -35      39     231      0 |      36     41
mit   uuuuu |      29     -22    -240      65     -1 |      13     22
ngs   uuuuu |     -65      66     162     -25    -12 |      11     26
sio   uuuuu |     104      10     102       6     12 |      26     31

Table 7.1677.4   GPS week: 1677   Day: 4   MJD: 55987.500

                                                         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 |       9     -19     -27     194     -8 |      11     21
emr   uuuuu |     -38      42      65     101     -7 |      56     58
esa   uuuuu |     -10     -37     138    -328      2 |       1     15
gfz   uuuuu |     -43       2      13      45      5 |      18     25
grg   uuuux |      41     -31     -26      89    -13 |       0     36
igr   xxxxx |     -42      35      -8     -35      2 |      10     19
irf   xxxxx |       8     -10     -56      -1    -14 |       8     25
jpl   uuuuu |      16     -22     293     243      6 |      39     43
mit   uuuuu |       8       1    -253      30     -2 |      16     23
ngs   uuuuu |     -40      32    -109     175    -11 |      12     26
sio   uuuuu |     102      51      82     -33      1 |      31     34

Table 7.1677.5   GPS week: 1677   Day: 5   MJD: 55988.500

                                                         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 |      14     -56      89      22      1 |       9     19
emr   uuuuu |     -24      27    -130     397     -3 |      55     57
esa   uuuuu |      15     -64     135    -323      1 |       0     14
gfz   uuuuu |     -15      -7     -63      34     11 |      19     25
grg   uuuux |      44     -53       2       1      3 |      -1     37
igr   xxxxx |     -69      16     -22     -54      5 |      10     19
irf   xxxxx |      -1     -27     -40     -60     -2 |       6     24
jpl   uuuuu |     -58      -1     106     221     -6 |      40     44
mit   uuuuu |     -17     -28    -203     -16     -7 |      15     22
ngs   uuuuu |      -6     137      36     201      0 |      10     26
sio   uuuuu |      66      21     162    -152     -2 |      31     35

Table 7.1677.6   GPS week: 1677   Day: 6   MJD: 55989.500

                                                         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     -12     311     166     -7 |      12     21
emr   uuuuu |      18      44      27     271      4 |      58     60
esa   uuuuu |     -13     -48      49    -294      2 |       3     15
gfz   uuuuu |       4      25    -103    -127      7 |      24     28
grg   uuuux |      34       2       1      51     -7 |       4     35
igr   xxxxx |     -39      29       5    -101     -3 |      14     20
irf   xxxxx |       6     -10     -23      -9    -15 |       9     25
jpl   uuuuu |      12     -14      98     170     12 |      42     46
mit   uuuuu |       1     -17    -195      60     -2 |      17     23
ngs   uuuuu |     -76      46      38     180    -12 |      14     26
sio   uuuuu |     107      34     181       0     -2 |      35     37



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