[IGSREPORT-20757] Wk 1682 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Thu Apr 19 08:31:39 PDT 2012


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1682   (Apr 01, 2012 - Apr 07, 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:

igs1682[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1682[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1682[0-6].cls  IGS GPS clock combination summary report.
igs16827.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16827.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   | 9 27 9 27
                0  |  EMR   | 8 8
                0  |  GFZ   | 27 QAQ1 SFER THTI THU3
                0  |  GRG   | ONSA
                0  |  JPL   | 8
                0  |  MIT   | DAV1 MAW1 NYAL
                1  |  COD   | 8 9 27 9 27
                1  |  GFZ   | 9 27 MATE MCM4 SUWN SYOG
                1  |  GRG   | ONSA
                1  |  JPL   | 8
                1  |  MIT   | 22 22 CAS1
                2  |  COD   | 8 9 27 8 9 27
                2  |  ESA   | AREQ AREQ
                2  |  GFZ   | 8 9 27 AREQ
                2  |  GRG   | AMC2
                2  |  MIT   | 11 11 MAW1 TLSE
                3  |  COD   | 9 27 9 27 WILL
                3  |  ESA   | AREQ TIXI AREQ TIXI
                3  |  GFZ   | 9 27 31 SCH2
                3  |  GRG   | AMC2
                3  |  JPL   | 8 27 31
                3  |  MIT   | 21 22 31 21 22 31 CAS1 DAV1
                4  |  ALL   | 22
                4  |  COD   | 8 8 KOUC WILL
                4  |  EMR   | 9 27 9 27
                4  |  ESA   | AREQ AREQ NNOR
                4  |  GFZ   | 8 9 27 30 BRFT DGAR TWTF
                4  |  GRG   | AMC2
                4  |  JPL   | 1 27
                4  |  MIT   | 22 ONSA CAS1 DAV1 MAC1 MAW1 ONSA
                5  |  COD   | 8 9 8 9
                5  |  ESA   | AREQ AREQ NNOR THTI UNSA
                5  |  GFZ   | 9
                5  |  GRG   | AMC2
                5  |  JPL   | 8
                5  |  MIT   | BAKO CAS1
                6  |  COD   | 8 9 8 9 KOUC
                6  |  EMR   | MCM4
                6  |  ESA   | AREQ TIXI AREQ TIXI
                6  |  GFZ   | 8 9 ARTU BRFT
                6  |  GRG   | AMC2
                6  |  MIT   | MAW1 TWTF

 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  |     .7     .5    -.8     -37    -19     21     .14
       EMR  |    -.9   -7.5   11.9      -3      4      9     .46
       ESA  |    2.2   -2.9    8.7     -44    -71    111     .33
       GFZ  |    -.4     .6    -.6     -64      6    -27     .10
       GRG  |    2.1   -6.7   11.5     -51     48    -34     .21
       JPL  |   -3.2   -2.1    6.3     -10    -30     42     .43
       MIT  |    5.7   -6.0   11.3     -45     33    -57     .45
       NGS  |    4.3   -4.8   14.7     -73     -4     18     .43
       SIO  |   -4.1   -4.8    7.8     -76     -3    131     .61


 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 1.1682.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1682.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 2.1682.[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 3.1682.[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 5.1682.0-6).

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 1682 summary.                       (Apr 01, 2012 - Apr 07, 2012)

Table 1.1682.a   GPS week: 1682   MJD: 56018.000-56024.000

         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  258|    0     0     0   -12     1     5  -.28   10    9 |    -306    -591     18     78
        |    0     0     0    11    13    19   .02           |     551    1283
emr   93|   -1    -1     2   -60   -23   -15   .44   20   20 |    5297     196     15    101
        |    1     1     1    18    21    22   .02           |    1677     982
esa  173|    0     0     0   -30    96    32   .26    8    8 |    -735     410     29    178
        |    0     0     1    12    12    11   .02           |     929    1638
gfz  192|    0     0    -2    23    15   -26  -.19   12   12 |     189    -147     28    142
        |    1     0     1    30    51    13   .04           |     423     810
grg  124|    1     0     3     8  -111   -42   .63   17   16 |     -13      50     52    204
        |    0     1     1    11    14    12   .06           |     284     391
igr  n/a|    1     0    -3   -67   -31   -21  -.07    6    5 |    7441    -387     21    114
        |    0     0     0    13    18    10   .01           |     930     880
jpl  166|    0     0    -4   -70    27    34   .54   16   16 |    2944     150     22     90
        |    1     1     1     4    10    20   .02           |    1347     866
mit  264|    0     0     0     0   -70   -27  -.40   13   10 |    -199      55     22    127
        |    1     0     0    17    10    15   .04           |     203     400
ngs  226|    0     0     2    73   -48   -43  -.22   11   10 | -106558  186233   2008   3561
        |    1     0     1    27    39     9   .05           |  405371 1006735
sio  237|    0     2     3    82    -2   131  -.37   21   20 |     ---     ---    ---    ---
        |    2     1     1    16    21    16   .01           |     ---     ---


Table 1.1682.b   GPS week : 1682   MJD: 56018.000-56024.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1682.0   GPS week: 1682   Day: 0   MJD: 56018.000                            

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  258|    0     0    -1   -29    16    13  -.27   10    9 |    -649     284     18     89
        |                     53   -15                       |
emr   93|   -1    -2     1   -69    11   -12   .46   22   22 |    4384   -1164     12     82
        |                    -37   -51                       |
esa  173|    1     0     0   -37    89    31   .28    8    8 |     331   -2008     29    174
        |                     15   -18                       |
gfz  192|    0     1    -3    10   -74   -13  -.16   13   13 |     507   -1093     24    128
        |                    -28    24                       |
grg  124|    2     2     5     4  -133   -44   .65   17   17 |    -141    -250     48    233
        |                      7    -1                       |
igr  n/a|    1     0    -3   -72    -5   -16  -.07    6    6 |    8426   -1524     20    140
        |                    -15    37                       |
jpl  166|    0     0    -2   -75    23    37   .55   17   17 |    2223    -844     22     95
        |                     -7    38                       |
mit  264|   -1    -1    -1     7   -83   -40  -.43   13   10 |    -479     264     24    110
        |                      7    10                       |
ngs  226|    0     0     2   103    27   -56  -.29   11   11 |    -618     123   1991   3656
        |                    -82   -80                       |
sio  237|   -3     0     1   100   -40   134  -.35   22   23 |     ---     ---    ---    ---
        |                   -102    15                       |

Table 2.1682.1   GPS week: 1682   Day: 1   MJD: 56019.000                            

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  258|    0     0     0    -5    -2    15  -.26   10    9 |     193    -815     20     79
        |                     32    11                       |
emr   93|   -2    -3     0   -64   -49    14   .46   20   20 |    3180     368     16     95
        |                    -14   -11                       |
esa  173|    0     0     0   -27    93    26   .29    8    8 |   -2196    2009     33    181
        |                     13   -11                       |
gfz  192|    1     0    -4   -16    45   -21  -.16   12   11 |    -622     896     24    140
        |                    -40   -13                       |
grg  124|    1     0     2    10  -104   -58   .56   18   18 |    -212     146     56    210
        |                    -26     8                       |
igr  n/a|    2     0    -3   -76   -33   -21  -.07    6    5 |    6866    -401     19    115
        |                      3    30                       |
jpl  166|   -1     0    -3   -68    23    34   .55   16   16 |    1348     295     22    104
        |                     29   -31                       |
mit  264|    0     0     0     0   -56   -47  -.43   13    9 |    -419     200     28    145
        |                      1    -9                       |
ngs  226|    0    -1     5    97   -99   -40  -.29   12   10 | -999999 2307352   2024   3880
        |                    -56    70                       |
sio  237|   -1     2     2    93    20   124  -.38   22   20 |     ---     ---    ---    ---
        |                    -93   -29                       |

Table 2.1682.2   GPS week: 1682   Day: 2   MJD: 56020.000                            

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  258|    0     0     0    -4    21   -25  -.27   10    9 |    -203   -1751     18     75
        |                     32    -4                       |
emr   93|   -2     0     2   -54    -9   -46   .45   20   20 |    3791    1331     15     95
        |                    -29    -9                       |
esa  173|    1     1    -2   -22    88    46   .26    9    9 |     274   -1100     29    174
        |                    -11   -18                       |
gfz  192|    0     0    -2     9    17   -19  -.18   11   11 |     195      15     26    137
        |                    -60   -10                       |
grg  124|    1    -2     4    13  -114   -40   .67   17   15 |    -300     779     48    196
        |                    -27    -2                       |
igr  n/a|    1     0    -2   -64   -16   -31  -.06    6    5 |    6610     616     21    126
        |                    -24    33                       |
jpl  166|    0     1    -3   -78    49    38   .57   16   15 |    1742    1156     19     87
        |                     29   -32                       |
mit  264|    0     0     0   -21   -69   -22  -.42   13   10 |    -230      43     22    117
        |                     20    -9                       |
ngs  226|    0     0     2    96   -41   -29  -.25   11   10 |    -245   -1610   2341   3368
        |                      6   104                       |
sio  237|   -1     2     3    57   -12   151  -.38   20   19 |     ---     ---    ---    ---
        |                    -66   -12                       |

Table 2.1682.3   GPS week: 1682   Day: 3   MJD: 56021.000                            

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  258|    0     0    -1   -17     0    -1  -.31   10    9 |     137    -839     17     69
        |                     -3     1                       |
emr   93|   -2    -2     4   -28   -42   -17   .46   19   19 |    4967    1332     16    106
        |                    -51     4                       |
esa  173|    1     0     0   -44   121    17   .22    9    9 |    -370    -324     28    164
        |                     10   -39                       |
gfz  192|    0     0    -4    25    10    -9  -.17   11   11 |     547   -1116     29    140
        |                    -26    -7                       |
grg  124|    1     1     3    26  -128   -22   .68   16   16 |     -70     -86     54    193
        |                    -24    -1                       |
igr  n/a|    1     0    -3   -77   -28   -14  -.08    5    5 |    7026     619     22     98
        |                    -21    20                       |
jpl  166|   -1     0    -5   -68    17    70   .53   16   15 |    2620    1149     26     97
        |                     35   -25                       |
mit  264|    0    -1     0   -12   -71   -36  -.43   12   11 |    -143    -270     21    138
        |                     -1    -3                       |
ngs  226|    0     0     1    80   -41   -49  -.17   10    9 |  255812 -999999   1914   3368
        |                     65   100                       |
sio  237|    0     3     3    69     9   125  -.38   20   18 |     ---     ---    ---    ---
        |                   -103   -22                       |

Table 2.1682.4   GPS week: 1682   Day: 4   MJD: 56022.000                            

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  258|    0     0     0   -21     1    18  -.30    8    8 |    -755      46     19     82
        |                     31    10                       |
emr   93|    0     0     3   -49   -15    11   .41   21   21 |    7235     154     16    102
        |                    -63   -23                       |
esa  173|    0     0    -1   -45    99    23   .24    8    8 |    -518     770     28    196
        |                      3   -25                       |
gfz  192|    0     0    -2    83   -22   -38  -.17   15   15 |     576    -430     30    144
        |                    -24    33                       |
grg  124|    0     0     1    10   -98   -32   .68   17   17 |     457     197     53    197
        |                     -1   -25                       |
igr  n/a|    0     0    -3   -78   -27   -12  -.05    5    5 |    8644    -671     23    122
        |                    -27    20                       |
jpl  166|    3    -1    -4   -68    28     9   .51   17   16 |    4724    -164     23     83
        |                     -4     2                       |
mit  264|    1     0     0    30   -84   -25  -.39   13   11 |       0     312     19    123
        |                    -16     0                       |
ngs  226|   -2    -1     2    41   -44   -45  -.21   11   10 |    -651    -173   1959   3787
        |                     86    29                       |
sio  237|    1     3     4    91     4   119  -.38   20   19 |     ---     ---    ---    ---
        |                   -112    -5                       |

Table 2.1682.5   GPS week: 1682   Day: 5   MJD: 56023.000                            

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  258|    0     0    -1     4   -17   -12  -.27   10    9 |   -1146    1371     18     79
        |                      2     0                       |
emr   93|   -2    -2     2   -86   -26   -26   .43   21   21 |    7515    -955     16    110
        |                     -3   -32                       |
esa  173|    0     0     1   -21   100    50   .26    8    8 |   -1326    2501     27    172
        |                     -4   -34                       |
gfz  192|   -1     0    -1    33    70   -39  -.23   12   12 |     128    -107     34    149
        |                    -42    19                       |
grg  124|    0     0     3     9   -99   -54   .60   16   15 |     312    -449     47    202
        |                      3     5                       |
igr  n/a|    0     0    -3   -59   -57   -12  -.08    5    5 |    8129   -1416     20     96
        |                    -19    46                       |
jpl  166|    1     0    -6   -63    20     9   .53   17   17 |    4674    -988     20     69
        |                    -12     6                       |
mit  264|    1     0    -1   -11   -63     0  -.34   13   11 |    -208     508     19    117
        |                      9    -8                       |
ngs  226|   -1    -1     1    48   -71   -33  -.20   10    9 |    -542     357   1465   3133
        |                    -11    82                       |
sio  237|    1     3     4    69    17   153  -.38   22   20 |     ---     ---    ---    ---
        |                   -101   -20                       |

Table 2.1682.6   GPS week: 1682   Day: 6   MJD: 56024.000                            

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  258|    0     0     1   -12    -9    28  -.30    9    9 |     280   -2437     19     79
        |                     31    -2                       |
emr   93|    1    -2     1   -69   -31   -32   .44   19   19 |    6012     308     17    119
        |                     -9   -10                       |
esa  173|    0     0     1   -12    85    31   .24    8    8 |   -1341    1025     29    189
        |                     10   -26                       |
gfz  192|   -1     0    -2    20    63   -40  -.25   10   10 |      -6     806     35    158
        |                    -16     1                       |
grg  124|    1     0     0   -13  -103   -46   .56   16   16 |    -142      18     64    201
        |                     22     8                       |
igr  n/a|    0     0    -3   -41   -55   -38  -.06    6    6 |    6389      63     23    104
        |                      4    52                       |
jpl  166|    0     1    -4   -72    28    39   .55   17   16 |    3282     450     24     96
        |                     21   -49                       |
mit  264|    2    -1     0     9   -62   -20  -.37   13   11 |      81    -667     21    143
        |                      4    -7                       |
ngs  226|    0     0     0    44   -65   -45  -.17   10    9 |     335   -2415   2368   3737
        |                   -114    44                       |
sio  237|    0     2     4    95   -12   109  -.38   22   19 |     ---     ---    ---    ---
        |                   -114   -11                       |

       
       
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 3.1682.0   GPS week: 1682   Day: 0   MJD: 56018.000                            

        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   24    9   13   20   15   12    8   10   24    4 |    52   51   56   52   57   54   52   51   52   51    52
   2  |    8   27    8   13   18    5   22   10    9   24    5 |    25   31   27   22   33   25   32   25   25   24    25
   3  |   10   12   10    8   11    6   11    7   10   20    3 |    21   23   28   24   30   21   22   17   22   19    22
   4  |   11   21    7   13   20    6   16   15    8   21    4 |    30   36   31   28   32   28   41   27   27   34    29
   5  |    6   25    9   13   19    6   20   18   10   26    5 |    17   27   20   24   26   17   25   22   18   18    18
   6  |    8   14   10    9   12    3   11    6    9   20    3 |    24   25   31   28   34   24   26   21   22   21    25
   7E |   11   15    8    9   13    7   17   12   11   10    4 |    30   32   30   31   37   30   31   35   33   31    30
   8E |   28   25   19   15   24   11   27   39   23   35    9 |    48   57   46   47   54   47   61   66   56   55    49
   9E |   10   18    6   16   19    5   19   12    9   20    4 |    59   66   60   61   63   61   65   67   62   67    60
  10  |    7   17    6   12   15    4   13   16   13   20    4 |    22   25   28   24   31   26   28   25   29   19    25
  11  |    6   17    8   10   26    5   11    6   12   20    4 |    16   22   17   18   30   17   20   20   17   29    16
  12  |   10   30    8   16   18    4   21   10   11   24    5 |    34   43   36   40   39   33   37   36   36   33    33
  13  |    6   20   10   12   15    4   15    7   12   20    4 |    27   37   36   33   39   30   39   33   25   27    30
  14  |    7   27    4   14   10    5   17   14   16   27    5 |    33   40   37   46   41   36   39   39   37   32    35
  15  |    8   24    9   13   11    7   20   12   10   25    4 |    34   36   34   37   38   35   33   34   24   25    31
  16  |    7   24    8   15   16    6   20    8    9   22    4 |    21   26   26   31   35   21   26   20   20   19    22
  17  |   15   21    8   13   13    4   18   19   10   27    5 |    22   29   25   22   28   19   32   18   20   21    21
  18  |    8   28    6   15   15    7   17    9   11   21    4 |    25   36   31   32   35   27   32   26   29   26    28
  19  |    8   25    9   11   13    7   18   11   10   28    4 |    23   33   24   23   23   23   30   25   26   30    24
  20  |    8   26    7   14   17    5   16   16   12   18    5 |    18   25   23   22   26   20   23   28   21   24    20
  21  |   10   25    6   11   11    5   14    8    9   19    4 |    26   38   26   24   33   26   32   22   28   28    26
  22  |    6   25    7   11   18    6   19   11   10   19    4 |    23   33   30   32   42   28   32   25   28   20    27
  23  |    6   21   10   17   17    4   12    8   11   23    4 |    25   33   31   34   33   27   32   31   26   27    27
 X24  |    4  ---  ---  ---  ---   28  ---  ---  ---  ---    0 |    39  ---  ---  ---  ---   22  ---  ---  ---  ---    39
  25  |    7   22    4   16   14    3   15    9   12   22    4 |    23   34   32   33   40   27   34   33   33   24    28
  26  |    8   12    9   11   13    5   14   12    9   17    4 |    25   25   28   28   31   24   27   23   23   21    24
  27E |   12   19    7   14   22    5   20   12   11   19    5 |    66   70   69   68   64   68   67   73   72   70    67
  28  |   12   25    9   14   20    5   20   14   13   22    5 |    24   36   36   33   45   29   35   29   33   26    30
  29  |   11   21    5   14   12    6   20    7    9   29    4 |    25   35   26   28   27   25   34   28   27   26    26
  30  |    9   16    6   10   17    6   12   11   11   20    4 |    30   34   30   26   36   31   34   29   31   30    31
  31E |    6   26    7   13   20    5   17   12   12   21    4 |    19   32   21   21   31   19   26   23   24   24    21
  32  |    7   22    6   13   18    4   15   12   13   16    4 |    19   22   24   24   26   20   24   27   21   20    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   22    8   13   17    6   17   13   11   22      |T   28   35   32   32   36   29   34   31   30   29    30
 WRMS |    9   22    8   13   17    6   17   10   11   23      |NE  26   32   29   29   34   26   31   27   26   25    27
 MEDI |    8   22    8   13   17    5   17   11   11   21      |MD  25   33   30   28   34   26   32   27   27   26    27

Table 3.1682.1   GPS week: 1682   Day: 1   MJD: 56019.000                            

        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   22    8   13   26    6   15   11   10   19    4 |    32   37   36   34   39   31   32   32   31   29    31
   2  |    6   21    6   10   13    5   21    9   10   15    4 |    20   31   25   20   24   22   28   21   20   18    21
   3  |   10   12    8    8   16    4    8    7   10   17    3 |    18   23   21   19   28   17   22   15   16   17    18
   4  |    9   19    9   12   22    5   12   12   11   20    4 |    23   35   27   28   27   26   35   26   25   32    25
   5  |    7   20    5   15   22    8   19   17   15   19    5 |    16   28   18   22   29   18   25   19   14   18    17
   6  |   10   13    9   10   16    3   10    8   10   18    3 |    21   26   24   25   32   21   26   20   18   18    22
   7E |    8   16    7    9   14    5   16   14    9   11    4 |    21   27   22   21   26   22   24   24   22   25    22
   8E |   22   25   12   12   22   10   28   36   23   38    8 |    38   51   37   39   49   40   55   53   45   40    39
   9E |   11   18    7   13   19    7   17   11   14   22    4 |    53   54   48   50   57   50   54   54   50   55    51
  10  |    9   23    9   10   13    4   10   17   11   16    4 |    20   28   24   25   26   24   27   32   23   27    22
  11  |    9   21    8    9   21    5   11    8   11   20    4 |    17   29   17   17   22   16   20   19   17   30    15
  12  |   11   24    7   13   17    6   20    8   12   24    5 |    28   35   28   30   36   26   32   32   31   29    28
  13  |    5   18    8   11   32    6   16    9   13   19    4 |    24   36   28   29   39   26   34   26   24   23    25
  14  |   10   19    7   13   15    5   14   12   14   24    4 |    18   33   26   30   32   25   29   26   25   21    22
  15  |   10   22    8   12   15    4   18   12   13   25    4 |    22   34   22   27   32   23   29   24   22   22    22
  16  |    7   23    6   14   15    4   20    7   12   21    4 |    16   29   19   22   28   17   26   16   16   15    16
  17  |    9   19    8   19   10    5   20   12   11   27    5 |    18   29   20   18   26   18   31   20   20   18    18
  18  |    9   24    7   13   20    6   14    8   11   19    4 |    17   32   21   23   31   19   25   20   18   21    18
  19  |    9   20    5   11   15    6   15   10   11   30    4 |    15   26   13   14   18   12   22   16   14   25    14
  20  |   10   23    9   15   18    5   17   20   10   21    5 |    19   35   23   26   22   20   28   25   23   25    21
  21  |    7   19    6   12   22    5   12    5    9   17    4 |    19   28   18   16   29   18   24   17   15   21    16
  22  |    7   20    8   11   21    4   13    8    6   19    4 |    14   29   23   23   35   19   26   18   15   16    19
  23  |    7   23    9   15   14    5   14   10   12   23    4 |    23   35   28   31   26   26   28   27   24   23    24
 X24  |    4  ---  ---  ---  ---   26  ---  ---  ---  ---    0 |    35  ---  ---  ---  ---   32  ---  ---  ---  ---    37
  25  |    4   14    4   12   14    7   13    9   13   20    3 |    18   26   22   20   31   19   30   24   25   17    20
  26  |   11   10    9    9   14    5   16   11    9   19    4 |    21   24   22   19   24   20   25   20   18   17    19
  27E |   13   21    8   12   19    6   19   10   13   21    5 |    53   55   51   57   51   53   49   58   58   52    53
  28  |    9   22    7   13   16    9   18   15    8   23    4 |    20   33   29   25   39   23   31   27   26   22    25
  29  |   11   18    7   11   11    6   18    9   10   30    4 |    17   25   15   16   17   16   23   18   15   18    15
  30  |    8   15    6    9   15    5   10    9   13   21    3 |    30   39   36   34   45   32   38   33   33   33    33
  31E |    8   19    6   10   17    4   16   10   13   18    4 |    13   25   18   16   26   12   22   17   13   16    14
  32  |    9   19    6   11   16    4   16   12   10   19    4 |    17   23   18   18   19   16   20   18   19   14    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   20    8   12   18    6   16   13   12   22      |T   23   32   25   25   31   23   29   25   23   24    23
 WRMS |    9   20    8   11   18    5   16    9   10   20      |NE  20   30   23   23   29   21   27   22   21   21    21
 MEDI |    9   20    7   12   16    5   16   10   11   20      |MD  20   29   23   23   29   21   28   24   22   22    21

Table 3.1682.2   GPS week: 1682   Day: 2   MJD: 56020.000                            

        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   20    9    9   23    8   15   12   12   15    4 |    46   46   48   46   47   47   46   45   49   43    45
   2  |    6   24    9   10   12    4   22   12   11   14    4 |    23   30   25   20   29   21   30   23   23   22    23
   3  |   12   16    7   10   16    5   10    7   12   18    4 |    19   23   20   24   27   18   21   18   21   16    19
   4  |    9   18    9   11   17    5   12   12   15   21    4 |    25   32   28   28   28   24   33   26   24   32    26
   5  |    8   22    9   11   19    6   20   12   11   14    4 |    19   30   20   21   26   18   25   22   19   18    20
   6  |    7   14    7   12   13    4    8    7   12   18    3 |    20   25   24   27   30   19   24   21   23   16    22
   7E |   10   16    8   10   14    3   15   15    9   15    4 |    26   30   25   26   31   25   28   31   27   28    25
   8E |   21   23   13   12   17   10   26   31   21   29    7 |    38   50   36   37   47   37   53   48   44   37    39
   9E |   12   16    8   13   20    6   18   11   10   20    4 |    37   38   28   33   37   32   36   36   37   35    34
  10  |    6   15   10   12   11    3   15   16   12   14    4 |    23   23   25   22   25   23   24   30   23   26    23
  11  |   11   14    6    9   22    4   11    6   10   20    4 |    21   25   16   20   25   18   21   21   23   30    18
  12  |   13   22    6   10   17    5   17   13   11   22    4 |    33   34   27   30   30   28   29   33   30   29    29
  13  |    6   21   10    9   18    4   15    9   11   17    4 |    26   34   31   27   34   26   34   30   27   26    27
  14  |   10   24    7   11   15    5   14   12    8   24    4 |    26   39   33   37   38   30   34   34   26   28    30
  15  |   11   25    9    9   15    7   19   18   10   24    5 |    28   35   28   30   34   27   31   31   22   25    26
  16  |    9   24    8   14   14    4   18    7   13   21    4 |    19   29   22   25   30   18   25   18   22   15    19
  17  |   11   19    9   11    7    7   17   11   14   24    4 |    21   29   19   16   23   16   30   18   19   23    17
  18  |   10   24    9   14   18    6   15    8    8   17    4 |    18   30   22   25   29   19   24   21   17   21    19
  19  |   11   20    6    8   16    6   15   11   10   26    4 |    24   30   22   18   21   20   27   25   27   28    22
  20  |    8   25   13   12   16    5   16   22   12   16    5 |    21   29   25   27   22   21   26   30   23   28    22
  21  |    9   20    7    8   14    4   11    6    9   16    3 |    22   30   23   20   26   21   25   20   22   25    21
  22  |    9   22    7    9   18    5   13    9    6   19    4 |    19   31   27   27   35   22   27   24   21   20    23
  23  |    6   25   10   12   14    3   13   11   10   21    4 |    25   36   30   30   28   26   31   30   26   26    26
 X24  |    4  ---  ---  ---  ---   29  ---  ---  ---  ---    0 |    27  ---  ---  ---  ---   36  ---  ---  ---  ---    29
  25  |    7   16    4   10   15    4   13    9    8   19    3 |    24   27   24   27   33   22   32   29   25   21    24
  26  |   12   11    9    7   14    5   12   11    8   17    4 |    21   23   24   23   27   20   25   21   18   17    21
  27E |   11   25    9   15   21    7   21    8   10   19    5 |    68   69   66   71   62   67   64   71   72   67    67
  28  |    9   23    8   10   18    7   18   16   15   20    5 |    21   35   24   24   35   24   30   26   28   22    24
  29  |   12   19    5   11   12    8   17    7    8   27    4 |    23   28   19   24   19   21   24   24   20   22    21
  30  |   10   13    6   10   26    6   10   10   11   26    4 |    31   45   41   37   52   35   45   35   35   35    37
  31E |    6   19   10   10   14    5   18   10   10   20    4 |    22   31   22   25   28   20   26   25   23   23    22
  32  |    9   17   12   11   13    4   14   10   10   18    4 |    19   24   26   26   22   21   22   23   22   18    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   20    9   11   17    6   16   13   11   20      |T   26   32   27   28   31   25   30   28   27   26    26
 WRMS |    9   20    9   11   15    5   15   10   10   19      |NE  23   30   25   26   29   23   28   26   24   24    24
 MEDI |    9   20    9   10   16    5   15   11   10   19      |MD  23   30   25   26   29   22   28   26   23   25    23

Table 3.1682.3   GPS week: 1682   Day: 3   MJD: 56021.000                            

        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   24   10    9   21    8   13    9   11   14    4 |    45   45   46   45   48   47   44   45   45   43    44
   2  |    7   22    8   12   14    6   22   13   11   15    4 |    21   27   22   21   29   22   30   24   26   24    22
   3  |   11   14    8    8   14    4   10    6    8   18    3 |    21   25   25   25   31   22   24   23   23   19    23
   4  |   10   18   10   11   14    4   15   18   13   19    5 |    21   29   25   25   27   21   32   21   26   28    23
   5  |    7   21    8    7   15    3   16   12   10    9    4 |    21   30   24   26   24   23   29   26   23   19    23
   6  |    9   14    9    9   12    4   10    7   10   19    3 |    28   31   31   32   36   27   31   29   28   25    29
   7E |    9   15    8    9   14    4   14   11    9   11    3 |    20   25   24   24   31   23   24   30   26   26    23
   8E |   17   22   11   12   20    7   22   23   16   29    6 |    45   56   42   47   55   44   61   48   45   45    46
   9E |   11   15    9   14   26    6   19   11   15   22    5 |    53   58   56   60   60   54   57   62   56   61    56
  10  |    7   13   10   10   12    3   13   18   10   12    4 |    18   22   22   23   23   18   22   23   26   16    20
  11  |    8   18    7    9   23    4   12    8   10   20    4 |    18   22   14   20   24   18   20   22   21   30    16
  12  |   14   26    8   12   16    6   21   12    9   24    5 |    36   45   39   39   38   34   39   43   34   37    35
  13  |    7   18   11   10   15    6   16   11   13   19    4 |    25   32   30   30   33   26   34   33   27   28    27
  14  |   12   22   10   15   14    6   13   16    7   26    5 |    28   38   39   44   43   35   39   41   33   34    35
  15  |   12   23    9    6   13    5   20   15    9   22    4 |    31   37   31   36   39   33   37   37   33   28    32
  16  |    8   21    8   12   16    4   20    7    9   23    4 |    20   34   25   28   35   23   29   25   23   22    23
  17  |   12   14    7   13    9    6   16   12   14   30    5 |    20   25   22   15   25   17   28   16   26   21    18
  18  |   10   23    9   10   17    5   15   12    8   17    4 |    17   33   27   25   27   21   28   29   25   24    24
  19  |    9   21    9    8   14    5   17   11    9   28    4 |    18   32   22   21   20   20   28   27   23   32    21
  20  |   10   21   10   15   17    5   15   18   12   18    5 |    14   24   21   26   22   17   20   29   22   25    19
  21  |    8   18    6   10   17    4   11    9    8   16    3 |    20   28   22   21   29   21   26   21   25   25    22
  22  |    9   23    8    9   14    5   13   10    8   17    4 |    16   32   30   26   35   23   28   26   24   22    24
  23  |    7   18    9   12   13    4   13   11    9   21    4 |    21   28   26   29   28   24   27   31   28   26    25
 X24  |    4  ---  ---  ---  ---   48  ---  ---  ---  ---    0 |    53  ---  ---  ---  ---   49  ---  ---  ---  ---    54
  25  |    5   14    5   16   12    6   13    8    7   16    3 |    18   29   22   24   35   19   30   28   21   22    21
  26  |   12   12    7    6   18    5   10   14    7   17    4 |    24   27   26   29   31   26   28   23   24   24    25
  27E |   11   20    9   14   26    5   20    8   11   22    5 |    77   75   78   77   70   76   72   78   79   75    75
  28  |   10   19    9   11   19    4   18   14   10   24    5 |    23   33   33   26   43   25   30   27   29   25    27
  29  |    9   16    8   14    9    7   17   13   11   27    4 |    23   31   23   25   21   23   32   33   27   29    25
  30  |    9   14    7    8   20    4   10   11   11   17    4 |    26   32   26   26   29   24   29   23   30   20    26
  31E |    9   18   11   13   15    4   16    9   10   21    4 |    16   30   23   22   29   19   25   27   27   25    22
  32  |    8   14   10   10   15    5   14    8   11   16    4 |    15   17   23   21   23   18   19   21   20   17    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   19    9   11   16    5   16   12   10   20      |T   26   33   29   30   33   27   32   31   29   28    28
 WRMS |    9   19    9   11   16    5   15   11    9   18      |NE  23   30   26   27   30   25   29   27   26   25    25
 MEDI |    9   18    9   10   15    5   15   11   10   19      |MD  21   31   25   26   31   23   29   27   26   25    24

Table 3.1682.4   GPS week: 1682   Day: 4   MJD: 56022.000                            

        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   21    8   14   24    6   14   10   12   15    4 |    41   42   41   44   47   42   40   41   46   38    40
   2  |    7   26    7   14   18    4   22   12    8   15    4 |    17   32   21   15   34   19   30   20   19   23    19
   3  |    9   14    7   12   13    4    9    6   11   18    3 |    17   25   21   18   29   20   24   18   20   18    19
   4  |    9   18    7   13   17    5   16   17   10   19    4 |    20   31   26   27   31   23   33   25   20   27    22
   5  |    7   25    6    9   18    4   20   18   10   16    4 |    24   33   29   27   26   27   29   35   30   34    25
   6  |    4   16    6   13   13    3    8    6    7   18    3 |    21   31   26   24   35   25   29   24   23   22    24
   7E |   10   16    6   16   18    6   17   17   12   15    4 |    17   24   20   20   24   16   22   24   23   22    17
   8E |   16   20    7   15   18    8   24   17   17   25    6 |    43   56   46   48   58   46   60   52   49   46    48
   9E |    8   19    9   15   28    7   20   10   17   20    5 |    37   44   40   37   46   40   42   45   43   44    38
  10  |    8   13    8   14   16    3   13   16   12   14    4 |    14   19   18   18   24   17   20   22   16   15    14
  11  |    6   17    5   13   26    4   12    8    9   21    4 |    21   27   20   22   29   20   25   23   20   32    19
  12  |   11   29    9   15   18    5   25   17   10   23    5 |    32   37   28   33   34   29   31   35   35   31    29
  13  |    5   19    6   15   16    5   15   11   11   20    4 |    23   34   29   25   37   27   35   31   24   26    25
  14  |   10   25    8   22   14    6   17   18    9   26    5 |    27   36   36   44   36   32   35   35   31   27    30
  15  |    9   26   11   11   12    5   22   13   10   23    5 |    27   35   32   30   35   28   31   29   26   26    27
  16  |    7   26    9   15   18    4   16    8   12   23    4 |    21   31   24   24   33   22   24   21   21   18    21
  17  |   10   16    7   21   12    8   16   11   12   27    5 |    15   26   19   20   24   18   27   15   20   21    15
  18  |    8   30   10   14   12    8   20   11    9   16    4 |    11   32   18   19   23   15   23   18   12   17    13
  19  |    8   21    7   10   16    6   15   12    9   27    4 |    19   28   18   15   21   18   24   18   20   23    17
  20  |    7   21    8   15   16    6   13   22   11   18    4 |    17   28   23   22   23   20   21   27   20   27    17
  21  |    5   20    8   11   20    7   12    9    9   17    4 |    17   25   17   18   30   18   24   16   19   22    16
  22  |    6   27    8   14   14    6   14   14    9   18    4 |    14   33   22   24   32   21   27   22   18   19    18
  23  |    6   22    6   16   15    3   13   10    9   22    4 |    24   34   31   29   32   26   32   30   23   25    26
 X24  |    5  ---  ---  ---  ---   48  ---  ---  ---  ---    0 |    33  ---  ---  ---  ---   31  ---  ---  ---  ---    34
  25  |    7   18    7   16   15    4   15    8   11   18    4 |    18   27   24   20   34   21   29   24   28   22    21
  26  |    8   15    8   12   14    5   14   18   10   17    4 |    19   22   26   24   27   21   22   28   22   17    21
  27E |   10   24    9   14   25    7   25    9   12   31    5 |    92   96   93   97   90   93   92   98   95   93    92
  28  |    9   20    8   16   18    5   20   14    8   21    4 |    19   29   27   29   38   22   28   26   29   21    23
  29  |    7   20    6   12   12    4   18    8   10   26    4 |    17   25   13   17   14   14   24   18   17   18    15
  30  |    7   17    5   16   14    4   10   13   12   15    4 |    22   30   24   21   32   22   28   24   23   23    23
  31E |    7   21    8   16   17    5   17   16   11   14    4 |    14   27   17   17   23   17   20   21   18   18    14
  32  |    6   16    7   15   13    5   12    9    9   17    3 |    20   25   23   24   25   22   25   26   24   22    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   21    8   15   17    5   17   13   11   20      |T   24   33   27   27   33   26   30   28   26   27    25
 WRMS |    8   21    8   15   17    5   16   11   10   19      |NE  21   29   24   24   30   22   27   25   23   23    21
 MEDI |    7   20    7   14   16    5   16   12   10   18      |MD  20   31   24   24   32   22   28   24   23   23    21

Table 3.1682.5   GPS week: 1682   Day: 5   MJD: 56023.000                            

        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  |    5   22    7   13   21    6   13   12    8   16    4 |    38   40   37   39   39   37   37   37   40   38    36
   2  |    8   26   10   12   18    5   25   14    9   18    5 |    20   30   19   15   32   19   29   20   22   23    20
   3  |    9   14    8   12   12    4   11    6    7   17    3 |    18   23   24   18   28   19   23   17   17   15    20
   4  |   11   17    7   13   12    4   17   14    8   23    4 |    23   36   25   24   31   23   33   21   24   29    25
  X5  |    5   22    9   10  ---    4   19   11   15   14    4 |    24   33   29   25  ---   25   31   29   26   26    27
   6  |    6   13    7   10   12    4   11    8   10   16    3 |    23   31   28   26   35   25   31   24   23   21    26
   7E |   13   16    9   12   18    5   14   18   10   15    4 |    17   24   17   22   23   18   20   27   21   25    18
   8E |   14   18   10    9   19    8   21   13   10   26    5 |    41   55   45   43   53   43   57   47   42   44    44
   9E |    9   22   10   14   24    5   24    8   13   22    5 |    55   62   59   59   65   59   63   60   62   59    58
  10  |   10   17    8   12   15    3   13   10    8   17    4 |    16   21   19   19   20   16   19   18   17   14    16
  11  |    7   19    6   15   22    5   11    9   10   21    4 |    17   28   16   20   27   16   23   22   19   32    17
  12  |   12   30    6   12   17    5   24   16    8   23    5 |    22   31   22   18   25   16   25   28   20   21    20
  13  |    9   21   11   11   16    5   15   13   10   25    4 |    24   33   26   23   35   23   32   30   27   22    24
  14  |   12   26   11   19   15    6   17   22   11   29    6 |    21   34   32   36   32   26   34   34   26   26    27
  15  |    8   28   12   10   13    3   23   11    7   24    5 |    26   32   29   24   29   22   28   26   26   21    24
  16  |    6   26   10   12   17    4   18    7    9   26    4 |    19   29   25   20   33   20   27   19   19   16    20
  17  |   10   16   10   17    8    4   19   10   15   29    5 |    14   25   17   16   25   16   27   18   25   21    16
  18  |    8   27    8    9   16    5   17   13    8   18    4 |    11   32   21   16   24   14   24   23   15   18    16
  19  |   11   22    9    9   14    6   15   11   11   28    4 |    15   25   16   15   18   14   21   17   19   22    15
  20  |   11   26    6   13   16    4   15   17    9   18    4 |    16   29   20   21   19   17   20   27   18   25    17
  21  |    6   20    7    9   17    4   12    9    8   17    3 |    18   26   15   16   28   15   24   18   22   20    17
  22  |    8   26    8   12   19    6   16   21    7   18    5 |    12   30   24   19   33   17   27   28   19   21    20
  23  |    7   20    6   12   15    3   12   11    8   26    4 |    25   32   24   24   26   24   28   29   25   24    24
 X24  |    4  ---  ---  ---  ---   38  ---  ---  ---  ---    0 |    25  ---  ---  ---  ---   27  ---  ---  ---  ---    26
  25  |    6   17    6   11   17    3   16    9    9   17    4 |    19   28   24   17   33   20   30   23   20   20    20
  26  |   10   14    9    7   14    4   13   15    9   18    4 |    20   27   28   25   32   23   27   28   24   22    25
  27E |   21   21    9   15   22    7   20   10   10   29    6 |   107  104  108  109  101  106  105  112  104  110   107
  28  |    9   21    9   10   21    5   21   11    9   22    4 |    17   31   27   19   39   21   29   24   27   19    23
  29  |    7   17    9   11   13    5   21   11   11   25    4 |    22   26   17   16   20   18   28   22   18   21    19
  30  |    7   17    7   12   14    4   11   10    9   16    3 |    19   29   24   20   28   19   26   26   19   23    22
  31E |    8   23    8   13   15    4   17   11   12   32    5 |    17   29   19   18   25   18   24   22   23   29    19
  32  |    7   19    7   11   13    4   17    9   11   16    4 |    18   26   21   18   21   19   24   22   19   18    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   21    8   12   16    5   17   13   10   22      |T   24   33   27   25   32   24   31   28   26   27    25
 WRMS |    9   21    8   12   15    5   17   11    9   20      |NE  20   29   23   21   28   20   27   24   22   22    21
 MEDI |    8   21    8   12   16    4   17   11    9   21      |MD  19   30   24   20   28   19   27   24   22   22    20

Table 3.1682.6   GPS week: 1682   Day: 6   MJD: 56024.000                            

        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   16    8    9   19    8   12   12    9   17    4 |    48   47   49   50   48   48   49   46   44   50    46
   2  |    6   24    9    9   15    6   23   11   11   14    4 |    25   39   28   25   37   30   38   25   24   26    27
   3  |   10   11    6    9   14    6   12    8   11   18    3 |    28   32   33   26   39   28   31   31   27   26    30
   4  |    8   14    9   11   14    5   10   10   10   27    4 |    23   33   27   23   29   23   33   21   21   33    24
   5  |   10   19    7   12   19    5   18    9   11   13    4 |    25   34   28   25   40   27   30   28   25   24    27
   6  |    8   10    6    8   12    4   11   11   12   16    3 |    32   40   40   35   46   36   39   40   32   32    37
   7E |   11   18    8    9   12    5   18   12   10   10    4 |    29   34   31   28   33   31   33   35   31   30    30
   8E |   14   18    9    9   17    9   20   11   16   29    5 |    56   67   55   58   64   55   69   55   55   54    56
   9E |   12   21   10   16   18    9   24   12   14   26    5 |    78   76   72   79   75   70   77   77   73   74    75
  10  |    9   11    8   11   16    6   13   13   13   20    4 |    20   22   23   19   25   20   20   21   21   14    17
  11  |    7   13    7   11   20    8    9   11    6   20    4 |    20   24   14   20   27   17   23   22   19   32    17
  12  |   15   24    8    8   19    8   19   14   11   24    5 |    31   33   27   24   30   25   27   28   26   23    24
  13  |    6   21    9    9   20    6   15   11   12   30    4 |    30   36   32   33   41   29   35   38   24   32    30
  14  |   10   22    6   15   15    7   15   23   11   24    5 |    33   39   41   46   43   40   38   46   33   33    37
  15  |    6   25    9   10   13    5   21   11    9   22    4 |    31   32   31   35   38   31   31   31   28   21    29
  16  |    9   27    9   11   18    3   22   10    8   29    5 |    25   33   33   30   38   26   31   30   27   27    28
  17  |    9   14    7   13   13    6   17   15    8   31    4 |    16   27   19   19   24   17   29   25   18   23    17
  18  |   10   26    6   13   18    5   16   14   10   15    4 |    17   33   23   18   28   16   27   24   16   21    18
  19  |   11   19    9    9   13    9   16   11   11   31    4 |    23   29   25   22   25   21   30   26   24   31    23
  20  |    8   18    9    9   20    8   17   16   11   19    4 |    18   24   21   19   24   19   21   29   19   28    17
  21  |    8   20    8   11   14    6   12   12    8   15    4 |    22   28   21   21   28   20   26   23   20   24    20
  22  |    8   21    9   10   21    7   15   23   14   15    5 |    16   33   28   23   37   20   29   32   22   20    22
  23  |    6   20    9   11   16    6   13   12    9   29    4 |    28   33   32   33   33   29   33   36   24   30    28
 X24  |    5  ---  ---  ---  ---   37  ---  ---  ---  ---    0 |    35  ---  ---  ---  ---   19  ---  ---  ---  ---    35
  25  |    8   16    5   11   14    4   14    8    9   15    3 |    23   26   26   21   33   21   31   28   21   26    23
  26  |    8   13    6   11   13    5   14   16   11   21    4 |    18   24   24   25   32   22   23   24   24   23    22
  27  |    9   17    6   13   16    6   17   10   10   27    4 |    96   95   96   97   93   95   91   98   96   87    94
  28  |    9   19    9    9   19    7   21    9    8   23    4 |    23   32   32   31   41   27   28   30   29   25    27
  29  |   10   16    8    9   12    5   18   10    9   26    4 |    24   26   21   24   22   23   29   25   22   23    22
  30  |    9   14    6    8   15    6   11   18    8   13    4 |    18   30   24   18   30   21   29   31   18   27    23
  31E |    8   20    8    9   21    5   18   21   12   11    5 |    20   32   24   18   31   20   29   34   25   30    24
  32  |    6   16    8    6   15    8   17   10    9   14    3 |    17   20   20   17   26   17   25   24   19   20    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19    8   10   16    6   17   13   10   22      |T   29   35   32   31   37   29   34   34   29   31    30
 WRMS |    9   19    8   10   16    6   16   11    9   19      |NE  24   31   27   26   33   24   30   29   24   26    25
 MEDI |    8   18    8   10   16    6   16   11   10   20      |MD  24   33   28   25   33   23   30   30   24   27    24



Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the estimated coordinates for the Latitude,
         Longitude and Height components.  See Table 5 for the daily summary.

         CLK  - Satellite clocks used.
         EPO  - Mean number of satellite clock epochs available in the daily
                solutions.
         Units: mm.

Table 4.1682   GPS week: 1682   MJD: 56018.0-56024.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3055 |U    4     5    12 |U    6    10    22 |U   11    19    26 |
emr | emr 2966 |     6     5    18 |U    7     9    26 |    12    20    25 |
esa | esa 2976 |     4     4    11 |U    6     9    21 |    10    17    24 |
gfz | gfz 2962 |U    4     4    12 |U    6    10    24 |U    9    18    26 |
grg | grg 2962 |     6     6    18 |U    7    11    27 |    16    22    37 |
igr | igr 2975 |     4     4    11 |     6    10    21 |    10    18    27 |
igs | igs 2945 |     5     5    12 |     7    10    24 |    10    19    25 |
jpl | jpl 2966 |     7     5    18 |U    7    10    26 |U   10    20    26 |
mit | mit 2976 |     5     5    13 |U    7    10    26 |    17    23    33 |



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 5.1682.0   GPS week: 1682   Day: 0   MJD: 56018.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3054 |     5     9    14 |     7     9    20 |     9    37    37 |
emr | emr 2964 |     7     5    20 |     7     7    20 |    10    39    27 |
esa | esa 2976 |     4     4    10 |     6     8    19 |    10    37    33 |
gfz | gfz 2958 |     5     7    13 |     7     8    21 |    10    38    38 |
grg | grg 2976 |     5     5    13 |     7     8    25 |     7    32    43 |
igr | igr 2973 |     4     4    10 |     6     8    19 |    11    35    50 |
igs | igs 2954 |     5     5    11 |     6    10    20 |     7    38    33 |
jpl | jpl 2964 |     7     5    17 |     6     8    21 |    12    38    33 |
mit | mit 2976 |     6     5    13 |     7    10    26 |     6    35    27 |

Table 5.1682.1   GPS week: 1682   Day: 1   MJD: 56019.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3063 |     3     3    11 |     6    11    20 |    14    16    26 |
emr | emr 2964 |     6     3    18 |     7    11    24 |     8    21    25 |
esa | esa 2976 |     3     3    10 |     6    12    17 |     9    15    32 |
gfz | gfz 2964 |     3     2    10 |     7    13    20 |     8    18    30 |
grg | grg 2976 |     7     8    13 |     6    15    22 |    12    13    30 |
igr | igr 2975 |     4     3     9 |     6    13    17 |     8    20    31 |
igs | igs 2965 |     4     4    12 |     6    14    23 |     8    24    29 |
jpl | jpl 2963 |     7     8    21 |     7    14    32 |     8    23    35 |
mit | mit 2976 |     5     4    13 |     7    14    21 |    19    31    35 |

Table 5.1682.2   GPS week: 1682   Day: 2   MJD: 56020.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3067 |     4     4    13 |     5     7    20 |     7    11    24 |
emr | emr 2964 |     5     4    18 |     6     7    24 |    12    12    27 |
esa | esa 2976 |     4     4    12 |     5     6    21 |     8     9    25 |
gfz | gfz 2965 |     4     4    14 |     6     8    20 |     8    10    25 |
grg | grg 2976 |     5     7    16 |     6    10    22 |     9    11    33 |
igr | igr 2976 |     4     3    12 |     5     9    18 |     8    11    25 |
igs | igs 2963 |     4     4    13 |     5     8    22 |     9    10    22 |
jpl | jpl 2964 |     6     4    15 |     6     7    23 |    11    13    29 |
mit | mit 2976 |     4     4    10 |     6     9    26 |    11    14    30 |

Table 5.1682.3   GPS week: 1682   Day: 3   MJD: 56021.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3047 |     5     9    12 |     9     8    25 |    22    15    38 |
emr | emr 2964 |     7     6    19 |     9    10    27 |    25     9    29 |
esa | esa 2976 |     6     6    13 |     7     7    23 |    17    12    29 |
gfz | gfz 2962 |     5     7    14 |     7     7    25 |    15    11    28 |
grg | grg 2976 |     7     6    23 |     8    10    29 |    24    18    39 |
igr | igr 2976 |     6     7    13 |     8     9    24 |    18    12    30 |
igs | igs 2907 |     6     7    13 |    11    11    31 |    19    11    30 |
jpl | jpl 2964 |     7     6    17 |     8    11    29 |    16    12    27 |
mit | mit 2976 |     7     8    14 |    10    10    28 |    57    32    80 |

Table 5.1682.4   GPS week: 1682   Day: 4   MJD: 56022.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3061 |     3     4     8 |     6    18    24 |     8     7    18 |
emr | emr 2968 |     5     4    15 |     8    16    31 |    10    14    19 |
esa | esa 2976 |     4     3     9 |     6    15    27 |     8     8    15 |
gfz | gfz 2962 |     4     3    10 |     7    17    30 |     7     9    19 |
grg | grg 2976 |     5     6    13 |     8    20    30 |     9    12    22 |
igr | igr 2976 |     4     3    10 |     6    16    25 |     7     7    16 |
igs | igs 2957 |     4     4    10 |     7    15    25 |     8    10    22 |
jpl | jpl 2968 |     7     5    17 |     6    15    28 |     9    10    16 |
mit | mit 2976 |     5     6    10 |     7    17    25 |     9    11    23 |

Table 5.1682.5   GPS week: 1682   Day: 5   MJD: 56023.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3052 |     4     4    14 |     6     9    19 |    11    22    20 |
emr | emr 2968 |     6     4    20 |     6     8    26 |    10    27    20 |
esa | esa 2976 |     4     2    14 |     5     8    21 |     9    18    17 |
gfz | gfz 2964 |     4     2    14 |     5    10    24 |     9    17    17 |
grg | grg 2880 |    10     8    31 |     8    10    25 |    36    42    40 |
igr | igr 2975 |     4     3    14 |     6     8    21 |     9    18    18 |
igs | igs 2916 |     5     4    14 |     6     8    22 |    13    17    18 |
jpl | jpl 2968 |     6     5    20 |     6     9    23 |    10    20    18 |
mit | mit 2976 |     5     5    14 |     6     7    29 |    10    19    15 |

Table 5.1682.6   GPS week: 1682   Day: 6   MJD: 56024.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3045 |     4     5    12 |     6     6    23 |     8    22    21 |
emr | emr 2972 |     6     7    16 |     6     6    30 |     8    19    25 |
esa | esa 2976 |     4     4    11 |     5     6    22 |     7    19    19 |
gfz | gfz 2964 |     3     4     8 |     6     7    27 |     7    23    22 |
grg | grg 2976 |     6     5    17 |     7     7    35 |    18    23    50 |
igr | igr 2975 |     4     4    10 |     6     5    24 |     8    21    22 |
igs | igs 2954 |     5     6    12 |     6     5    24 |     7    23    20 |
jpl | jpl 2972 |     6     6    16 |     6     5    28 |     7    26    22 |
mit | mit 2976 |     4     6    13 |     6     5    27 |     7    20    21 |


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 6.1682   GPS week: 1682   MJD: 56018.500-56024.500

                                                         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     -37      71      14     -2 |       4     14
            |       9      25      65      63      7 |       1
emr   uuuuu |      18      18      10     199     -6 |      57     59
            |      16      29      73     145      4 |       3
esa   uuuuu |      24     -17     -37     153     -5 |      13     20
            |      14      14      77     111      6 |       2
gfz   uuuuu |      -7      22     120     -69      3 |       2     14
            |      22      17      59     117      7 |       2
grg   uuuux |       1      -5      72     -69     17 |     -14     25
            |      13      25      98      64     30 |      11
igr   xxxxx |     -35       2      73       3      6 |      -6     15
            |      15      19      35      52      8 |       3
irf   xxxxx |      -1     -12      11     -18      3 |      -4     12
            |       7       9      21      22      7 |       1
jpl   uuuuu |      12     -25      67       9    -10 |      47     49
            |      33      20      47      64      8 |       2
mit   uuuuu |       3     -15    -119    -100     -6 |      12     20
            |      13      17      33      23      8 |       3
ngs   uuuuu |     -50       3     -14    -114      1 |       0     11
            |      58      66     136     140      8 |       2
sio   uuxuu |      11      87    -495     -56    -13 |      54     56
            |      20      19      56      74      6 |       5


Table 7.1682.0   GPS week: 1682   Day: 0   MJD: 56018.500

                                                         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     -73     198      14      3 |       4     11
emr   uuuuu |      39      17     -13     447     -6 |      60     61
esa   uuuuu |       6     -35     -29      -1     -2 |      14     18
gfz   uuuuu |     -36       8     198    -122      4 |       0      9
grg   uuuux |     -11     -27     257      52     41 |     -32     42
igr   xxxxx |     -49      -5      15      41      6 |     -10     14
irf   xxxxx |     -12     -20      39      18      2 |      -2     11
jpl   uuuuu |     -50     -13     142     137      3 |      48     49
mit   uuuuu |     -22     -27     -64    -119    -12 |      15     18
ngs   uuuuu |      68      62    -252     -42     -1 |       2     11
sio   uuxuu |     -27      82    -566    -127    -16 |      61     62

Table 7.1682.1   GPS week: 1682   Day: 1   MJD: 56019.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -12     -47      67      32      8 |       4     11
emr   uuuuu |      10      -1      36      81      1 |      59     60
esa   uuuuu |      10     -28     -21     166      5 |      14     18
gfz   uuuuu |      12      25      92      26     11 |       0      9
grg   uuuux |      -9      11     109     -94      4 |     -24     34
igr   xxxxx |     -31     -18      88       7      9 |      -9     13
irf   xxxxx |      -1     -15      24      -2    -13 |      -3     11
jpl   uuuuu |      30     -44      -6       3    -12 |      48     49
mit   uuuuu |       8     -16    -129    -105     -7 |      14     18
ngs   uuuuu |     -71      41      29    -179    -16 |       2     11
sio   uuxuu |      28      78    -576     -15    -13 |      58     60

Table 7.1682.2   GPS week: 1682   Day: 2   MJD: 56020.500

                                                         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     -44      89      74      5 |       6     14
emr   uuuuu |      14      17     -76     110     -8 |      60     62
esa   uuuuu |      23      -1      13     258     -5 |      16     21
gfz   uuuuu |      15      48     154      74      8 |       2     13
grg   uuuux |       7      15      22    -140     26 |     -16     22
igr   xxxxx |     -28      12     108     100     14 |      -6     13
irf   xxxxx |       5     -12      23      -9      2 |      -2     11
jpl   uuuuu |      37     -41      96      19     -4 |      49     50
mit   uuuuu |      14     -32    -131     -97    -14 |      15     19
ngs   uuuuu |     -99     -18     -77    -325      0 |       1     11
sio   uuxuu |      17      54    -439      59    -13 |      58     59

Table 7.1682.3   GPS week: 1682   Day: 3   MJD: 56021.500

                                                         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       4      76      12     -3 |       5     14
emr   uuuuu |       0      52      13     157    -10 |      58     59
esa   uuuuu |      43      -9     -31     306    -14 |      15     20
gfz   uuuuu |      11      27     183    -158     -4 |       3     13
grg   uuuux |       5      25     -62     -97     56 |     -10     16
igr   xxxxx |     -16      22      83     -47      4 |      -5     13
irf   xxxxx |       4       1      -4     -26     11 |      -4     10
jpl   uuuuu |      29     -34      58     -76    -16 |      47     49
mit   uuuuu |       7       2    -118     -70    -15 |      12     17
ngs   uuuuu |     -96     -64     -19    -180      9 |      -1      9
sio   uuxuu |      26     104    -488      13    -21 |      54     55

Table 7.1682.4   GPS week: 1682   Day: 4   MJD: 56022.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -12     -32      54     -29    -12 |       3     17
emr   uuuuu |      21      62     -65     311     -4 |      54     57
esa   uuuuu |      23      -4      18     115     -8 |      10     22
gfz   uuuuu |     -35      23     101    -231      7 |       0     16
grg   uuuux |      23       0      60     -22     27 |      -8     16
igr   xxxxx |     -22      26      60      -6     15 |      -6     16
irf   xxxxx |      -2      -1      19     -43      4 |      -6     13
jpl   uuuuu |      -4       3      62       9     -8 |      44     48
mit   uuuuu |      -2      15    -138    -136     -4 |       8     21
ngs   uuuuu |     -31     -87      -7       9      2 |      -3     12
sio   uuxuu |       3     111    -456    -127    -12 |      49     53

Table 7.1682.5   GPS week: 1682   Day: 5   MJD: 56023.500

                                                         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 |       7     -16      13     -98     -5 |       5     17
emr   uuuuu |      39     -11     141     250     -8 |      55     59
esa   uuuuu |      41     -10      -3      38     -2 |      11     23
gfz   uuuuu |     -12      28      54    -117     -1 |       3     19
grg   uuuux |       2     -17      28     -93      1 |      -4     21
igr   xxxxx |     -39       5      48     -39      1 |      -2     18
irf   xxxxx |       7     -14      -1     -40      4 |      -4     14
jpl   uuuuu |       1      -2      33     -16    -10 |      45     49
mit   uuuuu |      15     -23    -165     -78      1 |      10     22
ngs   uuuuu |     -75      -3      22      89      3 |      -1     13
sio   uuxuu |      27      87    -492     -94     -9 |      49     54

Table 7.1682.6   GPS week: 1682   Day: 6   MJD: 56024.500

                                                         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     -52      -3      92     -8 |       4     17
emr   uuuuu |       5     -12      32      38     -7 |      53     56
esa   uuuuu |      21     -31    -206     190    -10 |      10     22
gfz   uuuuu |      -6      -5      58      47     -7 |       3     18
grg   uuuux |     -13     -43      89     -92    -35 |      -4     21
igr   xxxxx |     -57     -25     109     -34     -8 |      -1     18
irf   xxxxx |      -5     -21     -23     -22      8 |      -4     14
jpl   uuuuu |      44     -42      84     -13    -21 |      44     47
mit   uuuuu |       2     -25     -90     -97      6 |       9     21
ngs   uuuuu |     -49      93     203    -168      7 |      -2     13
sio   uuxuu |       6      93    -448     -99     -3 |      47     51



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