[IGSREPORT-20742] Wk 1680 IGS Final Orbits Resubmission

IGS ACC igs.acc at noaa.gov
Mon Apr 16 08:49:28 PDT 2012


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1680   (Mar 18, 2012 - Mar 24, 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:

igs1680[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1680[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1680[0-6].cls  IGS GPS clock combination summary report.
igs16807.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16807.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  |  COD   | 4 9 27 4 9 27 KOUC YELL
                0  |  EMR   | 8 8
                0  |  ESA   | AREQ
                0  |  GFZ   | 7 9 27 31 SUTM
                0  |  GRG   | YELL
                0  |  JPL   | 4 8
                0  |  MIT   | 21 21
                1  |  COD   | 4 9 4 9 SOFI
                1  |  EMR   | 8 8
                1  |  ESA   | AREQ AREQ
                1  |  GFZ   | 4 7 9 27 30 31 ALRT BRFT
                1  |  GRG   | YELL
                1  |  JPL   | 8
                1  |  MIT   | CAS1
                2  |  COD   | 4 9 27 4 9 27 GRAZ WILL
                2  |  EMR   | 8 MCM4
                2  |  ESA   | AREQ AREQ
                2  |  GFZ   | 4 7 9 27 30 31 BRFT TWTF
                2  |  GRG   | YELL
                2  |  JPL   | QAQ1
                2  |  MIT   | DAV1
                3  |  COD   | 4 9 27 4 9 GRAZ
                3  |  EMR   | 8 8
                3  |  ESA   | AREQ AREQ
                3  |  GFZ   | 4 7 9 27 31 BRFT
                3  |  GRG   | USN3
                3  |  JPL   | 8 9 27
                3  |  MIT   | 17 17 CAS1 DAV1 MAW1
                4  |  COD   | 4 9 27 4 9 27
                4  |  GFZ   | 4 7 9 31 BRFT THTI
                4  |  GRG   | KIT3 WSRT
                4  |  MIT   | CAS1 MAW1
                5  |  COD   | 4 4
                5  |  EMR   | 8 8
                5  |  ESA   | AREQ AREQ MATE
                5  |  GFZ   | 4 7 9 27 31 MCM4
                5  |  GRG   | WSRT
                5  |  JPL   | 8 30
                5  |  MIT   | 9 27 27 DAV1
                6  |  ALL   | 8
                6  |  COD   | 9 9 30 KOUC
                6  |  ESA   | AREQ AREQ
                6  |  GFZ   | 4 7 9 30 31
                6  |  GRG   | AMC2
                6  |  JPL   | 4 30 CAS1 PALM
                6  |  MIT   | 22 30 22 CAS1

 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 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  |    -.8     .3   -1.8     -55     -4     -8     .12
       EMR  |    -.3   -1.5   11.5      -2      8     11     .59
       ESA  |    -.8    -.5    4.2      34    -79    119     .28
       GFZ  |   -2.1     .4    -.8     -55     46    -32     .19
       GRG  |   -2.8   -2.8    6.0     -45     54    -18     .10
       JPL  |   -2.5    -.9   11.7     -21    -28     -2     .45
       MIT  |    2.7   -3.5   12.6     -48     37    -69     .34
       NGS  |    4.2    1.8    8.6     -35     -7     19     .38
       SIO  |    -.1   -2.8    7.1     -54    -42     53     .65


 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 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 1.1680.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1680.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 2.1680.[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 3.1680.[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 5.1680.0-6).

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 1680 summary.                       (Mar 18, 2012 - Mar 24, 2012)

Table 1.1680.a   GPS week: 1680   MJD: 56004.000-56010.000

         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  259|    0     0     0    39   -10   -10  -.28    9    8 |    -511    -519     20     85
        |    0     0     0    12    16    16   .02           |     734     925
emr   91|    0     0     4   -59     0   -29   .48   22   22 |   92430     469     17    100
        |    1     3     1    44    21    10   .02           |  234605     799
esa  165|    0     0     0  -101    95    26   .23    9    9 |    -438     222     41    767
        |    0     0     1    11    18    17   .02           |     796    1353
gfz  186|    0    -1    -2    37   -67   -24  -.23   14   13 |      93      74     33    114
        |    0     1     1    51    62    14   .02           |     582     722
grg  118|    0     0    -1     9  -109   -17   .59   18   16 |     332     309     49    218
        |    0     0     2    14    11    14   .03           |     537     730
igr  n/a|    0     0    -2   -45   -25   -17  -.11    6    5 |   17652    -380     22    115
        |    0     0     1    14    18    16   .04           |     667     787
jpl  145|    0    -1     0   -29    44    41   .56   17   17 |    2122     254     23     93
        |    1     2     1    14     9    27   .02           |    1086     798
mit  276|    0     0     0    43   -61   -12  -.37   13   11 |    -189     159     23    128
        |    0     1     1    25    29    21   .05           |     156     141
ngs  225|    0     1     0    16    -6   -14  -.21   13    9 |   -2756    7979   1921   3513
        |    0     0     1    33    35    15   .06           |    5703   22302
sio  222|   -1     0     1    50    85    60  -.10   21   20 |     ---     ---    ---    ---
        |    1     2     0    12    25    28   .03           |     ---     ---


Table 1.1680.b   GPS week : 1680   MJD: 56004.000-56010.000   

         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  |    6    5    6    5    4    5    4 |
   2  |    5    5    4    4    5    5    5 |
   3  |    4    4    4    4    4    5    4 |
   4  |    6    5    6    5    5    5    6 |
   5  |    5    5    5    5    5    5    6 |
   6  |    4    4    4    4    3    4    4 |
   7  |    5    4    5    5    4    5    4 |
   8  |    7    7    7    6    6    7    6 |
   9  |    7    7    6    7    6    7    6 |
  10  |    4    4    4    3    4    4    4 |
  11  |    4    5    5    5    4    4    4 |
  12  |    5    5    6    5    5    5    5 |
  13  |    5    4    5    5    4    5    5 |
  14  |    5    5    5    5    5    6    5 |
  15  |    5    5    5    5    5    6    5 |
  16  |    5    5    5    5    5    5    5 |
  17  |    5    5    5    5    5    6    7 |
  18  |    5    5    5    5    5    6    6 |
  19  |    5    5    5    5    5    5    4 |
  20  |    6    5    6    5    5    5    5 |
  21  |    6    5    4    4    4    4    5 |
  22  |    5    5    5    5    5    6    5 |
  23  |    5    5    5    5    4    5    5 |
  24  |    0    0    0    0    0    0    0 |
  25  |    4    4    4    4    5    4    4 |
  26  |    4    4    4    4    4    5    5 |
  27  |    6    8    6    8    7    7    6 |
  28  |    5    5    5    5    5    6    5 |
  29  |    5    5    5    5    5    5    5 |
  30  |    4    4    4    4    4    4    4 |
  31  |    5    5    5    5    5    5    5 |
  32  |    5    5    4    5    5    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 2.1680.0   GPS week: 1680   Day: 0   MJD: 56004.000                            

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  259|   -1     0     1    51   -25   -42  -.31   10    9 |    -555    -614     16     81
        |                      6     2                       |
emr   91|    2     4     4    -4   -11   -17   .45   22   22 |    2985    -505     17     99
        |                    -30   -37                       |
esa  165|    0     0     1   -88    74    28   .19    8    8 |   -1165     363     32    195
        |                     36    24                       |
gfz  186|    0    -3    -4   -59   -87   -47  -.25   15   13 |     154     -70     33    106
        |                    -18    71                       |
grg  118|    1     0     2    14  -115   -27   .57   16   15 |      35     256     49    218
        |                    -22   -11                       |
igr  n/a|    1     0    -3   -28   -33   -47  -.12    5    5 |   18764    -593     23     90
        |                     -9    37                       |
jpl  145|   -2     1    -3   -18    39    53   .56   17   17 |    1717    -407     20     76
        |                     54   -43                       |
mit  276|    0    -2     1    30   -28    31  -.44   14   12 |    -111     133     23    129
        |                    -10    -2                       |
ngs  225|    0     1    -3    72   -11   -44  -.25   13   10 |    -348   -1042   1821   3298
        |                    -78    34                       |
sio  222|    0    -2     1    50   104   108  -.06   23   21 |     ---     ---    ---    ---
        |                    -19   -86                       |

Table 2.1680.1   GPS week: 1680   Day: 1   MJD: 56005.000                            

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  259|    0     0     1    39   -19    -7  -.30    8    7 |     908   -2451     15     71
        |                     36    10                       |
emr   91|   -2     3     4   -13    -5   -29   .47   23   21 |    2205     609     18    111
        |                    -55   -48                       |
esa  165|    0     0     0   -90   102    31   .22    9    9 |   -1115     759     31    250
        |                     23    18                       |
gfz  186|   -1    -2    -1    18   -10   -12  -.21   15   14 |      53     505     33    124
        |                    -59    34                       |
grg  118|    0     0     2    13  -115   -24   .64   16   15 |     113      61     40    231
        |                    -11   -10                       |
igr  n/a|    0     0    -2   -55   -44   -20  -.07    6    5 |   18029      58     20    113
        |                     22    18                       |
jpl  145|    0     0     0   -36    35    16   .53   17   17 |    1145     533     21     96
        |                     37   -36                       |
mit  276|    0    -3    -3     5   -73   -18  -.40   14   11 |     -97     129     22    127
        |                     20    27                       |
ngs  225|    0     2    -1    45   -13    -4  -.26   13    8 |  -15670   58550   1871   3518
        |                    -97   -13                       |
sio  222|    0    -2     0    41    76    81  -.11   21   21 |     ---     ---    ---    ---
        |                    -34   -67                       |

Table 2.1680.2   GPS week: 1680   Day: 2   MJD: 56006.000                            

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  259|   -1    -1     0    35     1   -21  -.26    8    7 |   -1425     322     16     86
        |                     16    13                       |
emr   91|    0    -1     7   -27    18   -18   .48   22   21 |    2652    -402     15     96
        |                    -34   -49                       |
esa  165|    1     2     0  -102    77    30   .26   10   10 |     639   -1792     35    471
        |                      8    16                       |
gfz  186|    0     0     0    52   -83   -30  -.24   15   14 |      73    -499     32    112
        |                    -28    85                       |
grg  118|    0     0     0    11  -102   -14   .60   16   14 |     440    -993     41    204
        |                     17    -4                       |
igr  n/a|    0     0    -1   -58   -25     4  -.09    5    5 |   17933   -1263     19    118
        |                      7    27                       |
jpl  145|    0     0     1   -22    42    81   .55   17   18 |    1680    -732     22     99
        |                     25   -39                       |
mit  276|   -1    -1    -2    45   -55   -18  -.39   13   11 |    -402     173     17    115
        |                     -6    10                       |
ngs  225|    2     2    -1   -12    16   -17  -.26   12    9 |   -1150     -45   2101   3581
        |                     15     3                       |
sio  222|   -3     0     0    53   104    58  -.16   21   20 |     ---     ---    ---    ---
        |                    -52   -87                       |

Table 2.1680.3   GPS week: 1680   Day: 3   MJD: 56007.000                            

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  259|    0     0     1    21     1    -4  -.26    8    7 |    -378    -429     22     95
        |                     48   -15                       |
emr   91|    0     0     5   -96    30   -47   .51   23   23 |  624457    1578     16    111
        |                     36   -63                       |
esa  165|    1     1     0  -114    97     9   .24   10    9 |    -598    -256     44   1173
        |                     10    18                       |
gfz  186|    1    -2    -2    92   -73   -34  -.21   15   15 |    -966    1422     34    126
        |                    -65    43                       |
grg  118|   -1    -1    -2    -9  -117   -20   .62   17   16 |    -244     391     50    216
        |                     42   -11                       |
igr  n/a|    0     0     0   -37   -13   -23  -.10    6    5 |   16754     759     23    152
        |                     -9    26                       |
jpl  145|    0    -1    -1   -37    60    73   .54   17   17 |    1002    1405     23    102
        |                     82   -48                       |
mit  276|    0    -1     0    78   -96   -10  -.36   13   10 |    -346     419     22    157
        |                    -18    21                       |
ngs  225|    0     1     1    -7     1    -6  -.14   13    8 |    -391    -371   1718   3200
        |                    -16    40                       |
sio  222|   -3     1     1    67    54    72  -.12   20   21 |     ---     ---    ---    ---
        |                    -57   -56                       |

Table 2.1680.4   GPS week: 1680   Day: 4   MJD: 56008.000                            

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  259|   -1     0     0    50   -36    -4  -.27    8    7 |    -412      13     18     83
        |                      6    34                       |
emr   91|    0     0     4  -102   -35   -34   .50   21   21 |    3500    1375     22    123
        |                     58   -40                       |
esa  165|    1     0     0   -89    98    56   .22    9    9 |    -544    2132     60    876
        |                     39    -4                       |
gfz  186|    0    -2    -2    19    23    -6  -.20   13   13 |    -123     175     34    108
        |                    -88    29                       |
grg  118|    1     0    -2     9  -112   -37   .57   18   18 |     657    1267     54    235
        |                      1     5                       |
igr  n/a|    0     0    -2   -44   -49    -9  -.07    6    6 |   17110     314     23    143
        |                     -4    54                       |
jpl  145|    0    -4     1    -7    36    20   .59   17   17 |    2099    1060     22     90
        |                    -17     4                       |
mit  276|    0     0     0    30   -35   -31  -.34   12   10 |     -96      94     22    112
        |                    -14    11                       |
ngs  225|    0     2     0    13   -59   -23  -.21   12    8 |    -306    -450   1879   3650
        |                    -25    93                       |
sio  222|   -1     1     2    29   114    43  -.11   20   20 |     ---     ---    ---    ---
        |                    -48   -67                       |

Table 2.1680.5   GPS week: 1680   Day: 5   MJD: 56009.000                            

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  259|    0     0     2    23     4     6  -.26    9    8 |   -1101    -588     30    100
        |                     54    10                       |
emr   91|    2    -3     4  -111     2   -29   .51   23   23 |    5280     390     18     90
        |                     60   -48                       |
esa  165|    0     0     0  -108    86    26   .26   12   11 |     707    -996     37   1163
        |                     28    34                       |
gfz  186|    0     0    -3    88   -65   -11  -.23   12   12 |     584    -727     35    112
        |                    -74    45                       |
grg  118|    1     1    -4    -7  -116    -8   .57   21   19 |    1344    1016     60    214
        |                      2    -7                       |
igr  n/a|    0     0    -3   -66   -19    -9  -.13    6    6 |   17665    -634     23     96
        |                     -3   -12                       |
jpl  145|   -1    -4     0   -50    45    17   .57   19   19 |    3366     271     28     92
        |                     23   -10                       |
mit  276|    0     0     0    71   -37   -27  -.31   13   11 |    -293     219     26    126
        |                    -21    -7                       |
ngs  225|    0     2    -1   -20   -32     0  -.12   13   10 |    -953    -749   2193   3879
        |                     -7    59                       |
sio  222|    0     3     2    62    94    25  -.08   21   20 |     ---     ---    ---    ---
        |                    -56   -57                       |

Table 2.1680.6   GPS week: 1680   Day: 6   MJD: 56010.000                            

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  259|    0     0     0    51     3     0  -.29    9    8 |    -616     111     24     82
        |                     11   -17                       |
emr   91|   -1    -3     3   -61    -1   -29   .46   22   22 |    5932     238     18     76
        |                     35    -2                       |
esa  165|   -1     0    -1  -114   129     2   .24    9    8 |    -996    1348     53   1247
        |                     19    20                       |
gfz  186|    0    -1    -1    50  -173   -25  -.24   13   12 |     879    -284     34    111
        |                    -40    35                       |
grg  118|    1     0    -3    34   -87     8   .56   18   17 |     -21     168     49    213
        |                    -13   -45                       |
igr  n/a|    1     0    -2   -28     5   -14  -.18    6    5 |   17312   -1306     24     93
        |                    -25     8                       |
jpl  145|    0    -1     1   -31    52    25   .55   18   17 |    3845    -351     26     96
        |                     23    23                       |
mit  276|    1     1     0    45  -101   -16  -.33   12   11 |      18     -50     29    134
        |                     -5    23                       |
ngs  225|    0     0     2    25    50    -3  -.19   13    9 |    -475     -37   1866   3469
        |                    -42   -61                       |
sio  222|    0     2     2    51    50    37  -.09   23   21 |     ---     ---    ---    ---
        |                    -58   -33                       |

       
       
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 3.1680.0   GPS week: 1680   Day: 0   MJD: 56004.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   10   32   11   22   14    7   15   19   11   16    5 |    36   44   40   35   32   32   32   44   34   37    35
   2E |    9   23    5   14   25    6   18    9   13   22    5 |    24   28   24   22   25   23   24   20   21   30    21
   3  |   10   12    7   12   12    6   13   11    6   14    3 |    15   26   23   22   26   19   23   21   21   16    19
   4E |   11   28   11   14   14    7   20   14   17   22    5 |    32   44   32   28   34   31   40   25   33   29    29
   5  |    8   20    8   15   14    6   18   18   15   20    5 |    26   37   30   33   33   26   36   32   26   30    28
   6  |   10   13    7   14   11    6   13   11    4   17    3 |    19   27   26   26   26   22   24   25   23   27    23
   7E |    6   20    8    9   16    6   15   17   12   17    4 |    24   27   23   18   25   21   27   29   24   21    22
   8E |   15   21    7   17   25    6   18   12   32   19    6 |    32   35   33   29   36   32   37   30   49   38    32
   9E |   17   22   12   18   18    7   21   16   24   22    6 |    47   45   43   50   49   47   45   46   56   43    45
  10  |    7   15    5   11   11    5   13    7   10   15    3 |    21   21   23   26   25   23   22   20   23   21    22
  11E |    8   18    5   12   11    5   11   16   16   19    4 |    21   28   20   24   22   22   24   27   26   26    21
  12  |   10   24    9   14   16    6   18   13    9   26    5 |    21   31   27   27   30   21   27   25   24   26    23
  13  |    7   24    9   12   15    6   17   14    8   19    4 |    22   35   28   26   38   24   34   29   26   22    25
  14  |   10   25    6   16   14    5   15   13    7   24    4 |    24   34   30   34   38   28   33   32   27   25    28
  15  |    9   23    8   18   18    5   18   15   11   24    5 |    22   32   26   35   37   25   32   26   27   24    25
  16  |    7   25    9   16   12    5   22   16    9   23    5 |    22   30   25   26   28   21   30   22   20   19    21
  17  |    6   22   10   15   14    5   21   10   10   36    5 |    15   29   17   18   22   14   28   14   16   26    14
  18  |   10   23    6   20   15    3   18   12   11   31    5 |    23   40   27   30   30   25   36   25   22   31    25
  19  |    8   26    8   13   13    5   22   10   12   24    5 |    18   29   17   22   19   20   26   20   19   22    16
  20  |    9   29   13   20   13    6   17   15   13   26    5 |    31   44   32   31   35   30   37   37   31   32    31
  21E |   10   21    7   14   37    6   14   11    9   24    5 |    19   31   25   24   38   24   29   24   26   27    24
  22  |    9   25    6   16   15    3   18   12    9   29    5 |    26   41   30   31   37   28   39   31   26   32    28
  23  |    8   26    8   15   13    5   15   12   10   25    4 |    22   34   27   27   30   24   29   29   30   23    24
 X24  |    6  ---  ---  ---  ---  ---  ---  ---  ---  ---    0 |    23  ---  ---  ---  ---  ---  ---  ---  ---  ---    24
  25  |    8   17    5   11   15    3   16   12   10   18    4 |    24   31   30   23   38   25   35   31   21   28    27
  26  |    6   13    6   17   14    5   11   12   10   19    4 |    21   19   22   26   27   21   25   21   22   19    21
  27E |   14   19   10   17   20    6   17   20   18   23    6 |    50   45   48   49   51   45   46   54   49   45    46
  28  |    8   27    8   11   17    3   21   10    9   23    5 |    21   33   25   25   37   22   32   25   25   26    24
  29  |    9   21    6   16   16    5   16   10   11   31    4 |    14   26   13   11   15   12   24   17   15   25    12
  30  |    9   13    7   13   10    3   10   10   11   18    3 |    16   25   20   17   20   16   24   17   21   17    17
  31E |   11   23    7   10   12    6   15   26   11   22    5 |    28   33   29   26   33   28   33   29   31   22    27
  32  |   10   25    7   15   12    6   16   11   14   18    4 |    21   26   24   27   22   19   23   27   22   20    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   22    8   15   16    5   17   14   13   23      |T   24   32   27   27   30   24   30   27   26   26    25
 WRMS |    9   22    8   13   15    5   17   12   10   21      |NE  21   30   24   25   29   22   29   25   23   24    22
 MEDI |    9   23    7   15   14    6   17   12   11   22      |MD  22   31   26   26   30   24   30   26   25   26    24

Table 3.1680.1   GPS week: 1680   Day: 1   MJD: 56005.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   10   30    9   24   13   10   11   17   10   14    5 |    26   35   28   31   28   25   25   28   27   26    24
   2E |    6   22    6   11   21    6   18   10   15   19    4 |    25   32   27   24   29   26   27   21   26   30    24
   3  |    7   12    8   11   12    4   10   11    8   14    3 |    19   30   23   24   27   22   26   20   17   21    21
   4E |    9   20   10   11   14    5   17    9   20   22    5 |    26   36   30   28   31   28   35   26   33   33    28
   5  |    7   20   11   12   15    7   19   12    7   22    4 |    27   36   28   33   34   29   33   29   28   30    27
   6  |    6   14    8   11   11    3   11   10    8   16    3 |    21   32   24   26   28   25   28   23   21   28    23
   7E |    5   17    7   11   16    4   13   18   12   14    4 |    24   26   29   26   30   23   25   33   28   24    25
   8E |   13   23   10   11   24    5   19   13   30   18    6 |    34   38   37   30   38   33   38   35   49   39    35
   9E |   16   19   13   17   20    9   22   16   26   24    6 |    60   61   56   63   62   59   57   58   66   56    57
  10  |    5   15    8    9   13    5   13    8    9   17    3 |    25   25   25   24   26   22   24   21   25   24    24
  11E |   10   18    6   11   13    7   11   17   12   18    4 |    24   38   29   30   34   28   30   34   31   29    28
  12  |    8   24   10   14   17    5   17   13   12   23    5 |    21   34   25   28   32   25   29   24   28   24    23
  13  |    5   22    8   13   15    6   16   15    9   16    4 |    26   36   31   28   38   27   36   32   28   28    28
  14  |    9   23    5   19   14    5   15   15    7   20    4 |    28   39   31   37   37   31   35   34   28   28    30
  15  |    7   20   10   16   17    6   19   11    8   24    4 |    28   37   33   34   35   30   34   30   29   30    29
  16  |    7   23    6   12   14    4   20   14    9   23    4 |    21   33   23   24   32   22   32   22   20   18    21
  17  |    8   20    9   14   15    6   17    8   14   32    5 |    29   33   27   25   31   27   33   26   28   28    25
  18  |    8   24    7   17   15    5   19   12   12   22    5 |    23   38   29   33   32   25   34   29   25   29    27
  19  |    6   25    9   14   14    4   21    8   10   23    4 |    21   33   22   22   26   22   32   23   24   30    22
  20  |    6   25    8   20   13    7   16   19    7   21    5 |    35   45   34   38   36   32   37   40   34   36    34
  21E |    8   22   21   12   21    7   15   12   10   14    5 |    23   32   26   24   29   22   27   22   24   21    22
  22  |    8   25    5   18   12    4   17   10    8   25    4 |    31   43   33   35   42   30   39   33   30   34    32
  23  |    6   21    9   14   14    6   16   15   10   22    4 |    27   35   28   27   31   28   32   32   32   27    27
 X24  |    5  ---  ---  ---  ---   65  ---  ---  ---  ---    0 |    23  ---  ---  ---  ---   62  ---  ---  ---  ---    23
  25  |    7   15   12   12   17    5   15   12   10   15    4 |    25   31   32   28   38   28   34   29   25   25    27
  26  |    5   17    8   12   16    5   13   10    8   26    4 |    24   28   26   27   28   25   24   23   27   26    24
  27E |   12   63   10   15   25    7   21   19   16   23    7 |    57   93   55   59   50   54   55   60   55   52    56
  28  |    7   23    7   11   15    6   17   10    8   22    4 |    22   37   24   19   37   24   34   22   22   26    23
  29  |   10   22    8   17   16    5   19   10   10   29    5 |    16   28   22   23   22   18   27   21   22   26    18
  30  |    9   11    6    7   11    4   12   14   10   16    3 |    21   31   24   21   28   23   29   27   25   23    23
  31E |    8   20    8   12   10    5   17   27   12   18    5 |    21   32   27   28   32   22   29   35   23   23    24
  32  |    9   22    7   30   13    5   15   12   10   16    5 |    22   27   23   36   21   18   22   24   21   21    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   23    9   15   16    6   17   14   13   21      |T   26   36   29   30   33   28   32   29   29   28    27
 WRMS |    7   21    9   14   15    5   17   11    8   21      |NE  24   33   27   28   31   27   31   26   25   26    25
 MEDI |    7   22    8   12   15    5   17   12   10   21      |MD  24   34   28   28   32   25   32   28   27   28    24

Table 3.1680.2   GPS week: 1680   Day: 2   MJD: 56006.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    7   35   11   21   20    5   11   14   11   20    5 |    25   37   24   29   28   24   24   25   25   31    23
   2E |    6   22    6   13   19    6   15    8   12   18    4 |    21   29   26   21   22   23   29   21   19   24    22
   3  |    6   13    9   11   13    3    9   10   11   13    3 |    18   23   22   22   24   18   23   16   20   15    18
   4E |   11   21    8   12   12   10   17   16   21   25    5 |    21   31   25   21   26   26   33   24   36   27    23
   5  |    7   19   12   16   14    6   21    9   12   20    4 |    27   35   27   29   31   25   34   27   29   26    26
   6  |    6   15    8   11   11    3   12   10    9   15    3 |    18   25   21   21   24   19   23   17   20   22    19
   7E |    6   17    8   13   19    4   15   20   10   14    4 |    21   27   20   20   24   21   26   22   17   19    19
   8E |   14   26   10   16   23    6   22   14   29   20    6 |    31   34   33   30   34   27   37   30   36   33    29
   9E |   14   21   12   19   17    7   18   18   20   23    6 |    47   46   37   48   43   44   45   47   48   41    43
  10  |    4   15    5   11   16    4   14    8    7   18    3 |    22   21   26   27   30   23   24   23   25   26    24
  11E |   13   17   11   15   15    4   10    9   15   21    4 |    34   48   42   44   46   38   44   39   38   38    38
  12  |    9   25   13   23   16    5   19   14    7   24    5 |    18   30   23   25   27   18   27   20   15   20    18
  13  |    7   21   12   13   15    5   18   14    9   19    4 |    24   34   29   25   37   25   37   25   20   25    24
  14  |    8   23    8   17   16    5   14   18    7   22    5 |    28   33   32   33   39   28   34   28   26   32    29
  15  |    8   24   13   16   16    6   21   11   13   21    5 |    23   32   25   26   30   21   30   26   24   25    22
  16  |    6   29   10   16   16    5   23    9    9   23    5 |    16   29   22   21   28   18   27   15   13   16    17
  17  |    8   23   12   18   13    5   18   11    8   31    5 |    16   33   21   21   29   18   31   19   16   20    18
  18  |    8   26    7   20   16    5   23   11   10   21    5 |    21   38   27   27   30   24   34   23   23   23    23
  19  |    6   26   11   15   16    5   20    9    9   20    4 |    15   31   18   20   24   15   27   13   15   14    15
  20  |    8   23   15   19   12    7   18   21    9   21    5 |    31   41   31   34   29   29   38   32   30   34    29
  21E |    5   16   14   14   15    3   15    9   12   12    4 |    24   30   34   23   30   26   30   23   26   24    25
  22  |    6   24    9   14   15    4   16   14   15   23    5 |    30   37   32   31   39   29   34   27   29   27    28
  23  |    6   22    8   16   13    4   16   12    7   23    4 |    24   32   24   27   26   25   33   27   25   23    24
 X24  |    4  ---  ---  ---  ---   26  ---  ---  ---  ---    0 |    27  ---  ---  ---  ---   31  ---  ---  ---  ---    27
  25  |    9   16    8   13   16    4   15   13    8   19    4 |    23   31   28   26   35   24   35   25   21   22    25
  26  |    6   14   10   12   12    4   18    7   13   19    4 |    20   24   23   21   25   19   25   22   20   17    20
  27E |   14   22   13   17   24    6   19   20   17   24    6 |    61   57   69   66   64   66   60   71   71   65    63
  28  |    6   23    9   13   17    3   19   10   11   23    4 |    21   36   28   24   38   25   33   27   29   27    25
  29  |    8   21    8   18   11    7   18   10   10   29    4 |    17   28   15   17   19   15   28   16   17   23    15
  30  |    8   13    9   12   13    5   10   12    8   18    3 |    16   24   19   15   23   17   25   19   19   19    18
  31E |    7   21   12   14   12    6   12   20   10   18    4 |    22   30   27   24   29   23   28   21   22   18    21
  32  |    9   20    9   15   12    5   14   11    9   16    4 |    23   26   25   30   25   23   27   29   22   28    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   22   10   15   16    5   17   13   12   21      |T   24   32   27   27   30   25   31   25   25   25    24
 WRMS |    7   21   10   14   14    5   17   11    9   20      |NE  21   30   24   24   29   22   29   22   21   23    22
 MEDI |    7   21   10   15   15    5   17   11   10   20      |MD  22   31   26   25   29   24   30   24   23   24    23

Table 3.1680.3   GPS week: 1680   Day: 3   MJD: 56007.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8   31   10   20   16    7   12   13    9   16    5 |    23   32   28   26   29   24   23   31   23   27    24
   2E |    6   22    6   12   17    6   19    9   13   14    4 |    16   26   25   24   23   21   22   18   21   20    19
   3  |    9   15   11   15   13    4   17    9    6   15    4 |    16   25   25   20   26   19   26   17   16   17    18
   4E |    8   17    7   10   16   12   17   14   23   20    5 |    14   26   15   16   21   13   26   19   23   19    14
   5  |    6   26   11   11   15    5   22    8   14   18    4 |    31   42   36   39   34   33   39   34   32   32    32
   6  |    6   15    7   10   13    3   16    7    5   14    3 |    19   25   25   21   28   21   26   24   20   22    21
   7E |    7   20   12   12   15    4   15   15   12    9    4 |    20   25   25   23   27   21   22   29   21   24    21
   8E |   12   22   12   16   24    5   19   15   28   18    6 |    33   37   38   32   40   33   39   40   46   40    35
   9E |   15   20   14   18   26    8   21   16   27   24    6 |    65   68   60   67   64   65   61   65   71   60    62
  10  |    4   15    7    9   13    8   14    6   12   12    3 |    22   23   28   28   32   21   23   23   21   19    23
  11  |    6   17   13   15   25    5   12   10   12   20    4 |    20   28   23   23   30   22   23   26   22   24    20
  12  |    8   25    8   15   18    6   21   15   10   24    5 |    19   34   27   24   30   22   28   22   24   20    21
  13  |    6   23    9   12   18    6   16   13    8   19    4 |    23   38   30   30   42   27   33   32   27   26    27
  14  |    9   25    7   13   17    4   12   17   11   20    4 |    29   40   38   37   41   34   36   41   38   32    34
  15  |    5   26   10   18   13    5   20    9    9   19    4 |    32   43   37   42   41   35   38   30   36   30    33
  16  |    6   26    9   16   15    4   21    5    6   22    4 |    16   27   22   19   28   15   24   14   16   15    16
  17  |    7   21   13   17   14    5   20   15   10   30    5 |    19   31   18   18   25   17   31   22   18   25    17
  18  |    8   27    7   15   16    5   22   10    9   20    4 |    24   39   28   32   31   26   36   27   28   26    26
  19  |    9   28   14   15   16    5   19    9    9   20    5 |    17   32   20   18   22   17   28   20   20   21    17
  20  |    8   23   11    9   15    7   18   21   10   21    5 |    32   41   33   35   36   31   36   39   27   35    31
  21E |    6   18    7   13   20    6   13    5    7   13    3 |    22   29   25   26   32   24   29   25   23   28    24
  22  |    7   25   13   14   14    4   16   11   13   20    4 |    32   42   37   33   41   32   38   34   35   32    33
  23  |    6   24    8   14   17    5   17   11    8   23    4 |    23   35   30   31   34   28   30   32   28   27    27
 X24  |    4  ---  ---  ---  ---   53  ---  ---  ---  ---    0 |    25  ---  ---  ---  ---   43  ---  ---  ---  ---    26
  25  |    5   17    6   11   16    5   15   11    9   16    3 |    22   29   25   23   33   24   32   26   27   24    23
  26  |    4   17    6   10    8    6   15    8    6   22    3 |    26   31   30   33   31   27   25   26   26   29    26
  27E |   14   20   15   21   28    6   21   31   28   27    8 |   110  113  114  111  114  108  111  108  108  114   109
  28  |    8   30    9   16   19    4   21    8    7   23    5 |    15   37   22   21   33   17   29   21   17   22    18
  29  |    8   23    6   18   16    4   18    8    9   29    4 |    17   28   18   21   19   16   27   20   25   29    18
  30  |    7   16    6   12   16    3   10    8    9   17    3 |    16   28   20   14   23   16   25   21   19   21    18
  31E |    6   28    7   13   16    5   11   13   10   24    4 |    18   30   22   22   28   18   23   24   21   19    19
  32  |    9   26    6   27   15    4   17    8   10   17    5 |    16   25   19   37   24   20   19   23   23   19    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   23   10   15   17    6   17   13   13   20      |T   26   35   30   30   34   27   32   30   29   28    27
 WRMS |    7   23    9   15   16    5   17   10    8   21      |NE  22   33   27   27   31   24   29   26   24   24    23
 MEDI |    7   23    9   14   16    5   17   10   10   20      |MD  22   31   25   26   31   22   28   26   23   25    23

Table 3.1680.4   GPS week: 1680   Day: 4   MJD: 56008.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    7   24    8   14   18    7   12    9    8   17    4 |    15   27   19   20   25   16   21   20   17   21    16
   2E |    6   24    7   11   20    6   21    9   11   14    4 |    20   29   23   15   27   23   28   19   22   22    21
   3  |    8   12    8   10   17    7    9    8   11   14    3 |    14   22   23   15   25   17   22   13   20   12    16
   4E |   10   21    8   10   16    7   16   13   22   21    5 |    14   26   17   13   19   16   25   17   27   19    16
   5  |    8   24    8   12   18    5   23    8   10   18    4 |    21   31   24   27   27   20   29   20   21   22    21
   6  |    6   13   10    9   13    4   10    8    6   13    3 |    15   22   26   17   25   19   22   19   17   17    19
   7E |    4   16    8   12   19    7   17   12   12    9    4 |    14   21   14   14   17   15   19   18   16   14    13
   8E |   12   23    9   13   26    4   21   12   24   18    6 |    19   29   25   23   33   22   32   26   34   32    23
   9E |   17   20   14   17   26    8   21   15   16   21    6 |    46   51   49   58   54   50   52   52   50   50    48
  10  |    6   13    7   11   19    4   13   10    9   13    3 |    18   17   21   20   25   17   18   17   21   19    18
  11  |    4   16    9   15   23    7    8    7    7   20    4 |    14   27   18   14   21   13   20   16   13   17    13
  12  |    7   24   10   14   18    4   21   15    7   23    5 |    13   29   24   20   28   17   25   19   15   15    17
  13  |    7   19    7    9   20    4   15   10    8   17    4 |    16   29   17   17   34   15   28   17   16   14    16
  14  |    9   23    8   14   17    6   15   16   12   19    4 |    16   29   26   30   31   23   27   28   25   20    23
  15  |    8   25   11   12   20    7   18    9   10   19    4 |    19   29   29   29   32   23   25   19   20   18    20
  16  |    6   27    9   11   17    4   20    7    7   24    4 |    15   27   19   16   26   13   25   12   13   12    14
  17  |    5   19    9   15   16    7   20   12    9   32    5 |    17   30   16   15   25   18   29   18   19   24    16
  18  |   10   29    8   12   19    5   19   12    7   23    5 |    15   37   26   21   29   17   30   22   19   16    20
  19  |    7   19    9   13   17    8   19    8   11   21    4 |    13   26   12   16   18   13   25   15   16   16    13
  20  |    9   22   11   12   16    5   16   17   10   19    5 |    19   28   19   24   23   18   25   26   21   21    18
  21E |    7   15   14   12   23    6   11    7   13   12    4 |    20   27   26   19   28   18   25   22   22   20    22
  22  |    8   25   11   12   17    5   19   12    9   17    4 |    15   34   28   21   31   19   30   24   19   16    20
  23  |    7   23    6   13   19    5   17    8    9   21    4 |    12   26   14   17   26   14   21   15   13    9    13
 X24  |    5  ---  ---  ---  ---   26  ---  ---  ---  ---    0 |    21  ---  ---  ---  ---   19  ---  ---  ---  ---    22
  25  |    5   17    8   16   17    5   16   14    8   18    4 |    15   25   19   18   33   16   29   21   18   19    17
  26  |    6   15   10   13   13    7   15   11    8   19    4 |    12   16   23   27   23   17   20   15   14   21    16
  27E |   15   18   12   18   22    6   20   26   17   27    6 |    85   83   84   77   87   80   75   88   88   77    82
  28  |    6   22    8   14   18    4   23   11   11   22    5 |    13   34   19   19   34   15   28   20   20   20    18
  29  |    9   23    7   14   17    4   19   10   11   28    5 |    14   29   19   14   23   17   29   22   16   24    17
  30  |    8   13    7   12   13    3   10    9   11   15    3 |    14   24   18   15   22   13   24   16   16   19    16
  31E |    6   20    9   12   13    4   13   14    9   28    4 |    14   25   16   15   27   14   24   18   19   23    16
 X32  |    7   21    8   27  ---    5   17    9   11   17    5 |    14   15   16   31  ---   12   15   18   12   16    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   21    9   13   18    6   17   12   12   20      |T   18   29   23   22   29   19   27   22   21   21    20
 WRMS |    7   21    9   13   17    5   17   10    8   20      |NE  15   26   20   20   27   16   25   18   17   17    17
 MEDI |    7   21    8   12   18    5   17   10   10   19      |MD  15   27   19   19   26   17   25   19   19   19    17

Table 3.1680.5   GPS week: 1680   Day: 5   MJD: 56009.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8   26   10   11   17    6   13    9   14   16    4 |    16   29   20   24   23   19   24   20   20   23    17
   2E |    7   22    9   11   30    5   22   10    8   17    5 |    13   25   17   11   22   13   20   11   14   16    12
   3  |   14   15    9   10   17    5   15   11   12   16    4 |    11   21   16   12   20   13   19   12   13   11    11
   4E |   10   22   10   11   15   10   17   11   23   16    5 |     9   27   15   14   19   17   25   16   27   18    13
   5  |    7   23    8    9   21    6   22    9   12   22    4 |    24   30   25   20   25   20   27   21   22   20    20
   6  |    9   16    9   11   13    5   17   11   11   15    4 |    10   22   17   16   20   11   16   17   16   15    13
   7E |    6   18   11   13   19    9   17   13   13   11    4 |    11   18   14   15   14   11   17   14   10   13     9
   8E |   13   24    7   13   22   10   24   15   31   21    6 |    47   51   49   44   50   44   51   52   53   53    46
   9E |   17   23   22   14   23   10   24   15   25   25    7 |    80   78   71   78   79   77   79   75   76   75    74
  10  |    5   14   10   11   23    5   14   13    9   14    4 |    13   15   15   18   23   13   15   15   19   17    14
  11  |    6   16   10   12   24    7   12    9    8   21    4 |    17   29   19   19   27   20   25   18   19   18    16
  12  |    7   27   10   13   20    6   22   14    8   23    5 |    13   30   22   19   24   15   27   16   14   13    14
  13  |    6   21    8   12   21    7   16   11    9   20    4 |    18   31   21   22   36   21   29   19   21   15    18
  14  |    9   25   12   16   17    8   18   18   15   20    5 |    21   31   32   29   34   26   29   28   25   22    24
  15  |    7   28   16   18   18    6   23   10   12   20    5 |    17   29   27   25   29   18   26   15   20   16    18
  16  |    9   30    9   14   18    4   26    8   10   24    5 |    12   26   19   16   27   14   27   11   19   12    13
  17  |    7   21   12   12   18    4   21   18   11   45    6 |    11   27   17   14   21   14   29   20   17   32    12
  18  |    9   30   16   15   20    5   25   14   12   22    6 |    17   34   23   19   27   16   28   20   17   19    16
  19  |    7   24   12   10   17    5   21    7    7   23    4 |    14   28   14   12   20   14   25   12   16   19    12
  20  |    7   26    8    8   20    5   15   12    8   19    4 |    23   37   26   25   26   24   28   27   25   27    23
  21E |    8   24   10   12   18    5   14    6   13   10    4 |    15   27   17   17   28   17   22   14   18   17    15
  22  |    9   31   17   13   21    7   24   16    9   19    6 |    22   35   31   24   36   23   29   27   23   22    22
  23  |    7   23    7   13   19    4   15    7   10   24    4 |    21   30   21   23   27   21   24   19   25   16    19
 X24  |    4  ---  ---  ---  ---   52  ---  ---  ---  ---    0 |    41  ---  ---  ---  ---   25  ---  ---  ---  ---    39
  25  |    4   21    9   14   15    4   17   12    9   16    4 |    15   26   21   20   28   16   29   19   20   18    16
  26  |    8   18   11    9   14    6   18   12   11   24    4 |    20   19   20   18   23   18   21   23   17   20    17
  27E |   14   21   20   12   36    6   20   25   14   28    7 |   103  106  110  105  106  104  105  112  109  104   106
  28  |    9   24   12   13   39    7   21   14   12   24    6 |    13   33   25   21   40   16   29   20   17   20    17
  29  |    8   27   10    9   18    5   20    8    5   30    5 |    12   31   17   13   18   13   27   14   12   23    14
  30  |    8   17    7   11   19    5   15   10   11   12    4 |    10   22   19   16   21   14   22   16   20   20    14
  31E |    7   19   14   10   18    4   17   18   13   20    5 |    12   23   21   19   20   15   22   20   17   14    14
  32  |    9   19    8    7   17    4   14    7   10   15    3 |    17   23   23   22   23   20   21   23   22   22    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   23   12   12   21    6   19   13   13   21      |T   21   32   25   24   30   22   29   24   24   24    22
 WRMS |    8   23   11   12   19    6   19   11   10   20      |NE  17   27   21   19   26   17   25   18   19   19    17
 MEDI |    8   23   10   12   19    5   18   11   11   20      |MD  15   29   21   19   25   17   26   19   19   19    16

Table 3.1680.6   GPS week: 1680   Day: 6   MJD: 56010.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    9   24    6   10   16    5   11    8   10   16    4 |    17   28   24   23   24   18   23   22   21   25    19
   2E |    8   28   10   11   19    5   21   13   13   14    5 |    16   29   24   17   22   17   24   17   18   20    17
   3  |   11   12    8    9   13    5   10   14    8   13    3 |    13   21   22   19   21   15   24   19   17   12    16
   4E |   13   27    8   11   20    9   17   16   26   19    6 |    14   36   22   16   25   19   27   23   31   19    18
   5  |    8   24    9   13   21    7   23   11   17   24    5 |    21   31   24   22   27   19   28   20   22   21    20
   6  |    8   13   10    8   11    5   11   13    6   12    3 |    16   22   25   23   23   19   23   24   19   19    20
   7E |    8   17    9   11   15    5   18    9    6   10    4 |    16   22   19   18   15   14   21   16   15   15    16
   8E |   16   24   12   13   17    9   26   14   23   21    6 |    35   45   43   36   39   35   43   39   46   45    38
   9E |   15   20    9   14   19    8   20   15   25   24    6 |    70   70   66   71   67   71   66   71   77   61    68
  10  |    7   15    8    9   21    5   12   13   12   15    4 |    18   17   24   25   31   19   19   22   23   21    20
  11  |    6   13    7   13   21    4   10    9    7   23    4 |    19   28   25   24   26   20   24   22   23   23    20
  12  |    8   26    7   12   19    6   20   12   10   24    5 |    12   30   23   20   25   16   25   21   15   15    15
  13  |    8   22    7   14   20    4   17   10   10   22    4 |    18   33   23   30   36   22   30   25   24   25    22
  14  |   10   21    6   12   18    6   17   15   10   21    4 |    21   28   28   31   36   25   28   28   25   24    24
  15  |    7   27    7   15   20    6   22    8   14   19    5 |    17   29   26   30   34   20   25   16   23   17    20
  16  |    9   29   10   13   15    6   23   10    9   23    5 |    16   29   21   22   26   15   27   14   15   15    16
  17  |    9   23   11   13   15    4   20   18    9   56    6 |    16   29   21   14   23   16   30   21   18   49    16
  18  |    8   26    6   15   20    4   22   10   16   28    5 |    17   32   23   22   28   21   30   20   25   30    19
  19  |    8   23    8    9   13    7   17    8    8   25    4 |    14   29   15   16   18   14   27   16   18   22    15
  20  |    8   26   11   11   31    5   18   12    6   20    5 |    24   43   27   33   37   25   31   29   28   38    26
  21E |   10   22    8   11   17    6   17    6   14   14    4 |    25   36   29   27   26   21   33   23   22   23    25
  22  |    7   22   10   10   20    5   17   14   11   20    4 |    19   29   28   26   34   20   28   25   23   24    21
  23  |    7   25    8   14   19    4   14    9   12   23    4 |    15   30   22   29   26   20   24   23   21   18    18
 X24  |    5  ---  ---  ---  ---   92  ---  ---  ---  ---    0 |    26  ---  ---  ---  ---   68  ---  ---  ---  ---    26
  25  |    7   20    6   13   13    4   15   12   13   13    4 |    20   26   25   22   28   19   31   25   18   20    20
  26  |   12   18    8   12   13    5   18   13   12   24    4 |    16   20   23   25   26   16   20   21   22   18    18
  27E |   12   17   13   15   25    9   19   21   15   28    6 |   110  114  120  115  108  113  113  110  114  120   112
  28  |   10   25   10   15   21    6   20   11    8   24    5 |    16   34   28   30   35   19   29   24   23   25    23
  29  |    8   24    5   11   14    6   19    9    8   30    4 |    19   32   20   15   18   18   32   18   20   26    19
  30  |    9   14    5   12   15    6   13   10    7   15    3 |    16   23   17   19   19   15   25   19   19   17    17
  31E |    9   19    8   15   18    4   18   15    8   16    4 |    15   22   24   21   20   14   23   16   15   15    16
  32  |    9   20    7   22   20    6   14   12    8   16    4 |    14   25   23   35   23   18   20   27   20   25    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   22    9   13   18    6   18   12   13   23      |T   22   32   28   28   30   25   30   26   26   27    24
 WRMS |    8   22    8   12   17    5   17   11    9   21      |NE  17   28   23   24   27   20   26   21   20   22    19
 MEDI |    8   22    8   12   19    5   18   12   10   21      |MD  17   29   24   23   26   19   27   22   22   22    19



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 4.1680   GPS week: 1680   MJD: 56004.0-56010.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3047 |U    5     4    10 |U   10    13    32 |U   13    28    47 |
emr | emr 2960 |     7     8    19 |U   12    13    35 |    17    40    54 |
esa | esa 2976 |     5     5    13 |U   10    12    32 |    18    28    52 |
gfz | gfz 2959 |U    8     7    17 |U   18    17    48 |U   15    33    55 |
grg | grg 2962 |     9    12    24 |U   12    21    43 |    22    46    57 |
igr | igr 2971 |     5     5    12 |    10    12    31 |    13    28    49 |
igs | igs 2930 |     5     6    14 |    10    13    31 |    14    39    54 |
jpl | jpl 2960 |     7     7    18 |U   10    13    33 |U   18    41    56 |
mit | mit 2976 |     8     7    18 |U   10    13    33 |    19    40    58 |



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 5.1680.0   GPS week: 1680   Day: 0   MJD: 56004.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3053 |     5     4    12 |     9    11    33 |     7    11    18 |
emr | emr 2960 |     6    10    16 |    16    13    47 |    12    12    21 |
esa | esa 2976 |     5     6    12 |    10    11    33 |     8    14    17 |
gfz | gfz 2959 |     8     7    15 |    20    15    46 |     9    16    24 |
grg | grg 2976 |     7     8    17 |    10    11    37 |    10    16    24 |
igr | igr 2975 |     5     6    10 |    11    10    37 |     7    11    20 |
igs | igs 2915 |     5     6    18 |    10    10    34 |     8    10    20 |
jpl | jpl 2960 |     6     9    17 |    10    13    36 |    13    12    28 |
mit | mit 2976 |    19    19    29 |    10    12    35 |    17    12    52 |

Table 5.1680.1   GPS week: 1680   Day: 1   MJD: 56005.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3045 |     7     5    12 |    12    11    35 |     6     9    18 |
emr | emr 2960 |     7     8    18 |    13    12    35 |    15    12    19 |
esa | esa 2976 |     6     6    15 |    11    11    34 |     7    12    19 |
gfz | gfz 2960 |     9     7    24 |    19    16    53 |    13    15    18 |
grg | grg 2976 |     6     7    23 |    11    12    39 |    10    12    26 |
igr | igr 2976 |     5     6    15 |    11    11    31 |     7    14    18 |
igs | igs 2934 |     5     5    11 |    11    13    33 |    10     9    22 |
jpl | jpl 2960 |    13     8    21 |    11    13    34 |    12     7    16 |
mit | mit 2976 |     6     5    20 |    12    12    36 |    10     9    21 |

Table 5.1680.2   GPS week: 1680   Day: 2   MJD: 56006.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3041 |     4     5    11 |     9    13    36 |    11    33    21 |
emr | emr 2960 |     7     8    17 |     9    12    37 |    19    46    34 |
esa | esa 2976 |     5     6    16 |     9    12    40 |    12    26    24 |
gfz | gfz 2959 |     7     7    19 |    20    18    51 |    18    37    36 |
grg | grg 2976 |     6     7    23 |    10    14    42 |    21    47    44 |
igr | igr 2976 |     5     5    15 |     9    13    36 |    11    38    22 |
igs | igs 2961 |     5     6    15 |     9    12    36 |    18    39    30 |
jpl | jpl 2960 |     7     7    20 |     9    15    40 |    22    43    35 |
mit | mit 2976 |     5     5    16 |     9    13    38 |    19    39    33 |

Table 5.1680.3   GPS week: 1680   Day: 3   MJD: 56007.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3052 |     5     7    11 |    15    18    50 |    13    30    28 |
emr | emr 2960 |     7    12    21 |    16    20    49 |    15    44    60 |
esa | esa 2976 |     6     8    14 |    15    18    51 |    14    36    30 |
gfz | gfz 2957 |     6     8    13 |    23    21    61 |    17    47    55 |
grg | grg 2976 |     7    10    17 |    17    20    57 |    16    37    49 |
igr | igr 2976 |     6     8    12 |    14    19    47 |    12    31    26 |
igs | igs 2954 |     6     9    16 |    16    19    46 |    16    44    58 |
jpl | jpl 2960 |     8    10    19 |    15    19    51 |    14    40    60 |
mit | mit 2976 |     6     8    15 |    17    20    60 |    17    47    49 |

Table 5.1680.4   GPS week: 1680   Day: 4   MJD: 56008.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3045 |     4     2    10 |    10    20    28 |    27    36   114 |
emr | emr 2960 |     7     7    22 |    11    16    29 |    24    82   106 |
esa | esa 2976 |     5     4    13 |    10    14    23 |    57    44   199 |
gfz | gfz 2959 |     8     4    15 |    12    25    39 |    18    26   125 |
grg | grg 2880 |    14    18    33 |    14    38    50 |    59   103   136 |
igr | igr 2976 |     5     3    12 |     9    16    24 |    20    25   127 |
igs | igs 2963 |     5     5    15 |     9    17    26 |    21    87   113 |
jpl | jpl 2960 |     7     6    20 |    11    14    28 |    38   100   125 |
mit | mit 2976 |     6     5    15 |     9    17    26 |    36    93   108 |

Table 5.1680.5   GPS week: 1680   Day: 5   MJD: 56009.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3034 |     4     4     7 |     9    11    22 |    21    70   110 |
emr | emr 2960 |     7     7    19 |    10    11    23 |    25    76   119 |
esa | esa 2976 |     5     5    10 |    10     8    23 |    20    54    57 |
gfz | gfz 2960 |     9     8    17 |    16    14    41 |    17    76   109 |
grg | grg 2976 |    18    28    43 |    14    48    52 |    22    94    99 |
igr | igr 2961 |     4     5     9 |     7     9    20 |    24    68   116 |
igs | igs 2964 |     6     5    14 |     9    10    19 |    15    73   112 |
jpl | jpl 2960 |     7     7    16 |     9     9    22 |    17    76   112 |
mit | mit 2976 |     6     5    17 |     7    10    21 |    23    69   118 |

Table 5.1680.6   GPS week: 1680   Day: 6   MJD: 56010.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3059 |     4     3     9 |     6     7    19 |     7     8    19 |
emr | emr 2960 |     5     6    21 |     7     7    24 |    10     9    23 |
esa | esa 2976 |     4     3     9 |     6     7    18 |     8    10    19 |
gfz | gfz 2961 |     8     8    14 |    16    13    44 |    12    15    19 |
grg | grg 2976 |     6     5    14 |     6     8    25 |    13    15    21 |
igr | igr 2961 |     4     3     8 |     6     7    20 |     7     7    17 |
igs | igs 2823 |     4     3     9 |     7     8    21 |    10    10    21 |
jpl | jpl 2960 |     5     5    11 |     7     7    21 |     9     7    19 |
mit | mit 2976 |     6     5    15 |     7     7    20 |    12    12    25 |


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 6.1680   GPS week: 1680   MJD: 56004.500-56010.500

                                                         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     -33       7       6      0 |       9     27
            |      16      21      76      64      6 |       2
emr   uuuuu |      46     -17    -104     129     -8 |      74     79
            |      21      48     161     107      4 |       3
esa   uuuuu |     -13     -31     -41     -97      0 |      11     29
            |      14      16     120      46      5 |       2
gfz   uuuuu |     -44      46      39    -184     -8 |      10     29
            |      23      24      53     143      5 |       6
grg   uuuux |      17     -10      11    -100    -40 |      11     44
            |      14      19      65      39     27 |      17
igr   xxxxx |     -18      -4       0     -41     -7 |      -1     25
            |      21      18      55      48      8 |       3
irf   xxxxx |       5      -7      -9     -15      8 |      -5     20
            |       6       6      20      17      4 |       2
jpl   uuuuu |      26     -40     140      18      2 |      49     54
            |      26      28     105      48     14 |       2
mit   uuuuu |      -7       0     -29      62     -3 |      13     28
            |      18      18      67      69      6 |       4
ngs   uuuuu |     -17      28       2     165      6 |       3     19
            |      45      36      66      92      5 |       2
sio   uuxuu |      69      39    -475      62    -12 |      82     86
            |      20      17      88      67      4 |       5


Table 7.1680.0   GPS week: 1680   Day: 0   MJD: 56004.500

                                                         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     -11      74     -50      1 |      13     22
emr   uuuuu |      42      25    -356      78     -9 |      80     82
esa   uuuuu |     -19     -41      89     -71     -8 |      14     22
gfz   uuuuu |     -66      13      -1    -313    -19 |      21     26
grg   uuuux |      16      17     -47    -150    -16 |      37     61
igr   xxxxx |     -32       4     -23     -72    -11 |       6     16
irf   xxxxx |       5      -5     -29     -10     12 |      -3     12
jpl   uuuuu |      48     -59       1      48     28 |      50     51
mit   uuuuu |       7       5     -73     105     -9 |      20     23
ngs   uuuuu |     -29      73     115     206      9 |       6     13
sio   uuxuu |      91      14    -584     162     -8 |      89     90

Table 7.1680.1   GPS week: 1680   Day: 1   MJD: 56005.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -13     -53      27      57      2 |       9     24
emr   uuuuu |      45      38    -205     223     -3 |      75     78
esa   uuuuu |     -21     -40     -95     -56     -1 |      11     25
gfz   uuuuu |     -37      42      81    -242     -5 |      14     27
grg   uuuux |       7      -6      45    -115    -17 |      27     56
igr   xxxxx |     -21     -39     117     -50      2 |       0     22
irf   xxxxx |      -3     -17      21     -26      9 |      -5     16
jpl   uuuuu |      33     -54     206     -19      3 |      48     49
mit   uuuuu |     -30     -37      39      49    -11 |      15     25
ngs   uuuuu |      10      80     -43     172      6 |       3     16
sio   uuxuu |      64      17    -408      50    -13 |      85     88

Table 7.1680.2   GPS week: 1680   Day: 2   MJD: 56006.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -13     -17     -33      55      6 |       6     25
emr   uuuuu |      49      33    -210     217     -2 |      73     77
esa   uuuuu |     -16      -9      95    -150      9 |       9     26
gfz   uuuuu |     -85      27      50    -262     -5 |      10     28
grg   uuuux |       4     -18     -79    -113    -29 |      18     53
igr   xxxxx |     -27      -8      -5       5      4 |      -2     24
irf   xxxxx |       0      -1     -29     -28      1 |      -8     19
jpl   uuuuu |      39     -26     178     -74     12 |      46     49
mit   uuuuu |     -10       5    -147      96     -3 |      12     27
ngs   uuuuu |      -3     -16      33     252     -2 |       1     17
sio   uuxuu |      87      51    -587      74     -7 |      82     86

Table 7.1680.3   GPS week: 1680   Day: 3   MJD: 56007.500

                                                         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 |      20     -48      16     -13      1 |       9     30
emr   uuuuu |      68     -36      84     274    -13 |      76     81
esa   uuuuu |     -13     -10     -55    -167     -1 |      13     33
gfz   uuuuu |     -38      65     -34    -265     -9 |      11     30
grg   uuuux |      16     -42      94     -87    -18 |       7     27
igr   xxxxx |     -21       9     -11     -54     -1 |       0     28
irf   xxxxx |       5       0     -22      -8     14 |      -5     23
jpl   uuuuu |      53     -82     147      34    -14 |      51     57
mit   uuuuu |     -16      18     -54      70     -5 |      15     31
ngs   uuuuu |     -35      16     -23     195     13 |       3     22
sio   uuxuu |      61      57    -499      95    -17 |      85     89

Table 7.1680.4   GPS week: 1680   Day: 4   MJD: 56008.500

                                                         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     -16      52     -59      1 |      10     30
emr   uuuuu |      53     -68      12      77     -8 |      74     80
esa   uuuuu |      17     -49      38     -99     -3 |      12     33
gfz   uuuuu |     -16      78       9    -228     -4 |       7     31
grg   uuuux |       8     -11     -11    -121    -71 |       4     29
igr   xxxxx |     -41      -6     -50    -117    -14 |      -1     29
irf   xxxxx |      13     -10     -13     -12      6 |      -5     23
jpl   uuuuu |       9       7     -14      40      0 |      50     57
mit   uuuuu |       2       4      14      84      2 |      12     32
ngs   uuuuu |     -80      15     -64     213      4 |       3     22
sio   uuxuu |      80      38    -426      30    -13 |      81     86

Table 7.1680.5   GPS week: 1680   Day: 5   MJD: 56009.500

                                                         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     -63    -145     103     -2 |       8     29
emr   uuuuu |      61     -69      41      -3    -13 |      72     78
esa   uuuuu |     -21     -37    -216     -47      2 |      10     32
gfz   uuuuu |     -32      65     123     -70     -5 |       5     30
grg   uuuux |      20     -11      83     -84    -82 |      -4     38
igr   xxxxx |      25      -6     -34     -28    -16 |      -3     30
irf   xxxxx |      13      -9       3      17      4 |      -6     23
jpl   uuuuu |      23     -32     224      64     -9 |      50     56
mit   uuuuu |      20      12      -8     114      4 |      10     30
ngs   uuuuu |     -46      -2     -52     -31      3 |       2     22
sio   uuxuu |      70      47    -469      79     -9 |      77     83

Table 7.1680.6   GPS week: 1680   Day: 6   MJD: 56010.500

                                                         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     -19      58     -47    -12 |       9     29
emr   uuuuu |       2     -43     -92      36     -8 |      71     77
esa   uuuuu |     -20     -27    -144     -89      1 |      11     33
gfz   uuuuu |     -35      32      45      91    -10 |       3     30
grg   uuuux |      45       5      -4     -28    -50 |     -13     47
igr   xxxxx |      -8      17       8      27    -13 |      -5     30
irf   xxxxx |       0      -8       7     -35      8 |      -5     23
jpl   uuuuu |     -23     -31     242      32     -3 |      49     56
mit   uuuuu |     -23      -3      29     -86      3 |      10     30
ngs   uuuuu |      61      34      51     150      6 |       2     22
sio   uuxuu |      33      50    -354     -58    -14 |      76     82



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