[IGSREPORT-20842] Wk 1686 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri May 18 06:25:34 PDT 2012


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1686   (Apr 29, 2012 - May 05, 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:

igs1686[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1686[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1686[0-6].cls  IGS GPS clock combination summary report.
igs16867.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16867.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   | USNO USNO WILL
                0  |  EMR   | 10 10 CHUR CHUR MCM4
                0  |  ESA   | AREQ AREQ
                0  |  GFZ   | 10 DAV1
                0  |  JPL   | 32 CHUR NNOR
                0  |  MIT   | 10 10 32 DAV1 DAV1
                1  |  EMR   | 10 32 10 32
                1  |  ESA   | AREQ AREQ NNOR
                1  |  GFZ   | 10 ALRT DAV1
                1  |  GRG   | LHAZ
                1  |  JPL   | 32 RAMO
                1  |  MIT   | 10 32 10 32 CAS1
                2  |  COD   | 10 10 WILL
                2  |  EMR   | 30 MCM4
                2  |  ESA   | 10 10 UNSA
                2  |  GFZ   | 10 32 REUN
                2  |  JPL   | 1 10 32
                2  |  MIT   | 27 32 27 32 MAW1 CAS1 MAW1
                3  |  COD   | 10 10 USNO DAV1 TLSE USNO
                3  |  ESA   | 10 10 CHUR YAKT CHUR COCO NNOR UNSA
                3  |  GFZ   | 10 32 BRFT CHUR NICO WILL
                3  |  JPL   | 32 CHUR COCO
                3  |  MIT   | 32 32 CAS1 TLSE
                4  |  COD   | 10 10 HNPT KOUC WILL
                4  |  EMR   | 20 30 GRAZ WTZR
                4  |  ESA   | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                4  |  ESA   | 21 22 23 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7 8
                4  |  ESA   | 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26
                4  |  ESA   | 27 28 29 30 31 32 AREQ AREQ
                4  |  GFZ   | 10 30 32 BOGT BRFT QAQ1
                4  |  JPL   | 30
                4  |  MIT   | 14 14 DAV1 TLSE
                5  |  COD   | FLRS
                5  |  EMR   | 10 21 30 10 21 30 HERS
                5  |  ESA   | NNOR UNSA
                5  |  GFZ   | 10 BRFT DAV1 DGAR HARB SOFI
                5  |  GRG   | ADIS
                5  |  JPL   | 32
                5  |  MIT   | 10 32 10 32 DAV1 MAW1 CAS1 DAV1 MAW1
                6  |  COD   | KOUC FLRS KOUC XMIS
                6  |  ESA   | DAV1 IRKJ NNOR UNSA
                6  |  GFZ   | 10 32 BRFT DGAR PDEL RAMO SEY1
                6  |  GRG   | IRKJ
                6  |  JPL   | 10 32
                6  |  MIT   | 10 10 CAS1 MAW1 CAS1 DAV1 MAW1

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets.  Note that only the largest clock offset and drift are output
    to the summary file.  However, the clock combination and the listed RMS
    include all the clock segments.  In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                0  |  ESA   | ~13:45 | ~ 0.03 ns

 6. The following table lists all maneuvered satellites for this week.
    The solutions from COD and ESA, which modeled the maneuver, are used
    that day for combination. An associated accuracy code of 0 (unknown) 
    is given if only one AC is left (no redundancy). For the long arc  
    evaluation the arc is split into two parts at the given maneuver epoch.
    
               PRN |    Date    | Ref. NANU
               ----+------------+----------
               G19 | 2012_05_01 | 2012029 

 7. Velocity changes were estimated to alleviate the effects of modeling
    problems, experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G32 |    |    |    |    |    |    |  1 |

 8. 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.
    

 9. 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  |     .3    -.3   -1.1     -46    -24     31     .11
       EMR  |     .1   -7.7    3.7       6     18      6     .47
       ESA  |   -1.0     .0   20.1      -3     65     93     .13
       GFZ  |   -1.1    1.0     .2     -56     18    -13     .11
       GRG  |   -1.0   -2.6   21.3     -48     37    -42    -.02
       JPL  |   -1.7   -3.2    9.2     -38     15     18     .48
       MIT  |     .7   -4.3   15.1     -58     37    -75     .16
       NGS  |    4.6   -4.5   17.4     -80     -5     22     .32
       SIO  |   -1.9    -.1    1.0      -6    -42     92     .32


10. 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.

11. 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.

12. 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 1.1686.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1686.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 2.1686.[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 3.1686.[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 5.1686.0-6).

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 1686 summary.                       (Apr 29, 2012 - May 05, 2012)

Table 1.1686.a   GPS week: 1686   MJD: 56046.000-56052.000

         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  267|    0     0     0    15    47     5  -.25    9    9 |    -473    -340     19     69
        |    0     0     1    10    14    11   .02           |     603     812
emr   89|    1     0    -2   -98    19   -12   .33   17   17 |    2502    -612     15    113
        |    1     2     1    11    26    14   .04           |    1199    1120
esa  177|    0     0     1   -74   -37    15   .23    8    8 |    -647    -208     47    158
        |    1     0     1    10    12    11   .02           |     332     748
gfz  196|    0     0    -2    35   -19    -9  -.20   12   11 |      39    -138     29    110
        |    0     0     1    44    44    18   .04           |     438     759
grg  124|    0     0    10     0   -48   -23   .58   16   15 |     190    -317     58    202
        |    0     1     1     8     8    12   .06           |     282     406
igr  n/a|    0     0    -1   -59     9   -28  -.07    5    5 |    2002    -379     19     77
        |    0     0     0     6    14    13   .02           |     591    1087
jpl  150|    0     1    -5     3   -32    30   .52   14   14 |    1950    -293     18     86
        |    0     1     1    14    11    44   .03           |     428    1125
mit  290|   -1     0    -3    51   -42   -28  -.42   11   11 |    -165      -3     20    140
        |    0     0     1    13    19    14   .02           |     416     485
ngs  226|    0     0     4    89    47   -36  -.26   11   10 |   99621 -167424   2072   3567
        |    0     0     1    31    28     8   .04           |  245961  372543
sio  241|    0     1    -2   -36   124    95  -.12   19   18 |     ---     ---    ---    ---
        |    1     1     1    12    19    11   .04           |     ---     ---


Table 1.1686.b   GPS week : 1686   MJD: 56046.000-56052.000   

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

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



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 2.1686.0   GPS week: 1686   Day: 0   MJD: 56046.000                            

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  267|    0    -1     0    12    39     0  -.26    9    8 |     523   -1690     20     63
        |                     46   -26                       |
emr   89|    1     4    -3  -103    14   -31   .34   17   17 |    4451    -655     18    132
        |                     15   -42                       |
esa  177|    0     0     1   -78   -26    40   .23    9    9 |    -193   -1136     15    127
        |                      9    15                       |
gfz  196|    0    -1    -4    11    22   -26  -.20   15   14 |      17    -218     29    122
        |                     25     8                       |
grg  124|    0     0    11    10   -40   -30   .53   14   13 |     412    -524     55    228
        |                     34   -33                       |
igr  n/a|    0     0    -2   -59     4   -22  -.09    5    5 |    3039    -548     17     70
        |                      1    32                       |
jpl  150|    0     3    -5    -4   -28    69   .51   13   12 |    2604    -477     15     73
        |                     11   -41                       |
mit  290|   -1    -2    -4    46   -68   -49  -.47   10    9 |     427    -720     19    160
        |                     -2     8                       |
ngs  226|    0     0     6   127    37   -38  -.31   13   11 |     341   -1289   2350   3924
        |                   -100    36                       |
sio  241|   -1     0    -3   -50    93    79  -.16   19   18 |     ---     ---    ---    ---
        |                    -15   -80                       |

Table 2.1686.1   GPS week: 1686   Day: 1   MJD: 56047.000                            

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  267|    0     0     0    25    36    16  -.23    9    8 |   -1375     536     16     72
        |                     -2    18                       |
emr   89|    2     0    -1  -100    -4   -17   .38   18   18 |    3379    -615     15    149
        |                     -6   -17                       |
esa  177|    0     1     1   -81   -34    16   .26    8    8 |   -1224     220     15    145
        |                     -1    11                       |
gfz  196|    0     0    -3   -30    32    -3  -.15   11   11 |    -543     718     25    107
        |                     -5    34                       |
grg  124|    0     0     8    -2   -45   -29   .56   14   13 |      84    -349     52    214
        |                     -6    -6                       |
igr  n/a|    0     0    -1   -52   -15   -45  -.04    5    5 |    2048    -441     18     77
        |                     12    31                       |
jpl  150|    0     2    -6    27   -46    32   .54   15   14 |    1714    -386     18     98
        |                    -25    16                       |
mit  290|   -1     0    -3    25   -16   -39  -.43   10   10 |    -782     658     16    147
        |                      7    -4                       |
ngs  226|    0     0     5   139     2   -25  -.29   10    8 |    -907    -258   1949   3571
        |                    -14    61                       |
sio  241|    0     0    -3   -50   146   100  -.10   20   18 |     ---     ---    ---    ---
        |                    -24   -88                       |

Table 2.1686.2   GPS week: 1686   Day: 2   MJD: 56048.000                            

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  267|    0    -2     1    29    62     7  -.28   11   10 |    -144    -898     27     73
        |                     16   -36                       |
emr   89|    1     1    -1   -79    -5   -21   .36   17   17 |    3118   -1420     14    113
        |                    -24   -12                       |
esa  177|    0     1     1   -83   -39    11   .24    8    8 |    -799    -103     16    141
        |                     21    14                       |
gfz  196|    0    -1    -1     9   -46   -16  -.22   11   11 |     164    -465     26     96
        |                     -5    13                       |
grg  124|    0     1     9     6   -52   -21   .64   16   16 |     407    -575     54    208
        |                      3   -21                       |
igr  n/a|    0     0     0   -59    18   -37  -.08    5    5 |    2442   -1104     18     81
        |                      8    18                       |
jpl  150|    0     1    -3    17   -25    57   .52   14   14 |    2232   -1080     17     84
        |                    -37    49                       |
mit  290|    0     0    -3    51   -39   -24  -.43   10   10 |    -150    -171     17    127
        |                     -6    -2                       |
ngs  226|    0     0     1    84    78   -44  -.27   12   10 |  656191 -999999   2076   3648
        |                    -35   -30                       |
sio  241|    0     0     0   -28   115    96  -.09   19   18 |     ---     ---    ---    ---
        |                    -32   -96                       |

Table 2.1686.3   GPS week: 1686   Day: 3   MJD: 56049.000                            

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  267|    0     0     0    -2    51   -16  -.25    9    9 |    -178    -608     18     70
        |                     31    10                       |
emr   89|    2    -4    -4   -86    41     7   .29   18   18 |    1978    1435     14    119
        |                    -19   -68                       |
esa  177|   -2     0     1   -65   -49     3   .22    9    9 |    -645    -693     17    142
        |                     10    11                       |
gfz  196|    0     0    -2    61   -62     3  -.16   12   11 |    -167     640     27    122
        |                      3    12                       |
grg  124|    0     1    10    -5   -61   -26   .65   16   14 |      80     465     59    209
        |                     -1   -25                       |
igr  n/a|    0     0    -1   -66     9   -18  -.06    5    5 |    1362    1620     20     84
        |                     12    19                       |
jpl  150|    0     1    -4    -2   -23    32   .54   14   14 |    1248    1766     17     98
        |                      3    24                       |
mit  290|   -1     0    -2    62   -28   -15  -.42   12   12 |    -247     391     18    137
        |                     -6     5                       |
ngs  226|    0     0     4    67    46   -40  -.26   11    9 |    -263    -526   1907   3757
        |                     15   -46                       |
sio  241|    1     0    -1   -31   147   103  -.08   20   17 |     ---     ---    ---    ---
        |                    -47   -88                       |

Table 2.1686.4   GPS week: 1686   Day: 4   MJD: 56050.000                            

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  267|    0     0    -1    11    53    12  -.25    9    8 |    -801    -440     18     59
        |                     40   -15                       |
emr   89|    1     0    -2   -99    66     3   .33   19   19 |    2112   -1002     14     64
        |                    -23   -79                       |
esa  177|    0     0     3   -78   -53    17   .21    7    7 |    -497     912    233    275
        |                    -14     1                       |
gfz  196|    0     0    -1    95   -52    14  -.21   13   14 |    -209     176     30    100
        |                      5    26                       |
grg  124|    0    -1     9     5   -41   -43   .53   16   15 |    -360     -39     59    193
        |                      5   -14                       |
igr  n/a|    0     0    -1   -49    30   -10  -.07    4    4 |    1980    -703     22     81
        |                    -22    23                       |
jpl  150|    0     0    -6    -2   -25   -14   .55   15   15 |    2054    -567     22     75
        |                      7    43                       |
mit  290|    0     0    -3    57   -68   -23  -.40   11   10 |    -579     304     24    111
        |                     -5     9                       |
ngs  226|    0    -1     2    65    84   -46  -.28   12   11 |   43189 -170140   2284   3393
        |                     45   -14                       |
sio  241|    0     2    -2   -38   117   107  -.10   18   17 |     ---     ---    ---    ---
        |                    -46   -93                       |

Table 2.1686.5   GPS week: 1686   Day: 5   MJD: 56051.000                            

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  267|    1     0     0    16    22     7  -.24    9    9 |    -668     341     19     66
        |                     29    47                       |
emr   89|   -1    -3    -1  -111    21    -1   .32   17   17 |    1426   -2068     14     84
        |                      9   -50                       |
esa  177|    0     0     0   -53   -43     9   .27    8    8 |    -400    -959     14    118
        |                     -2     9                       |
gfz  196|    0     0    -1    24    28     1  -.21   11   10 |     867   -1509     32    104
        |                      8    28                       |
grg  124|    0     3    12   -15   -56    -9   .51   17   16 |     338    -725     68    170
        |                      9    -2                       |
igr  n/a|    0     0    -2   -63    15   -24  -.06    4    4 |    1730   -1782     21     72
        |                     28    -5                       |
jpl  150|    0     0    -5     2   -28   -41   .46   15   15 |    2021   -1741     19     94
        |                     -3    56                       |
mit  290|   -1     0    -2    50   -41    -8  -.41   12   11 |     135    -428     24    158
        |                      3     7                       |
ngs  226|    0    -1     3    80    30   -30  -.20   12   10 |    -550      19   1855   3043
        |                    -19   -90                       |
sio  241|    0     2    -1   -38   112    99  -.17   18   17 |     ---     ---    ---    ---
        |                    -30   -83                       |

Table 2.1686.6   GPS week: 1686   Day: 6   MJD: 56052.000                            

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  267|    1     0    -1    15    62    12  -.27    9    9 |    -673     376     21     82
        |                     43    18                       |
emr   89|    1    -1    -2  -106     3   -23   .27   17   17 |    1051      35     18    130
        |                    -18   -23                       |
esa  177|   -1     0     1   -80   -19     9   .20    7    7 |    -774     298     19    159
        |                      6    -7                       |
gfz  196|    0     0    -1    78   -58   -36  -.25    9    9 |     145    -308     36    121
        |                     -3    11                       |
grg  124|    1     0    10    -5   -39    -6   .62   15   14 |     375    -472     63    196
        |                     18   -26                       |
igr  n/a|    0     0    -2   -67     7   -42  -.09    4    4 |    1416     303     22     77
        |                      7    -2                       |
jpl  150|   -1     0    -5   -16   -52    80   .49   14   14 |    1781     429     18     80
        |                    -30    28                       |
mit  290|   -1     0    -1    66   -34   -36  -.40   13   12 |      40     -56     24    143
        |                     -7     6                       |
ngs  226|    0     0     3    63    48   -30  -.19   11    9 |    -653     220   2087   3635
        |                    -31   -13                       |
sio  241|   -1     3    -3   -13   136    78  -.15   21   21 |     ---     ---    ---    ---
        |                    -34   -93                       |

       
       
Table 3: Daily fit for each satellite and each centre resulting from weighted
         average combination and from long arc orbit dynamics (7-day). The
         first IGS column gives resulting satellite accuracy measures found in
         SP3 header. The last IGS column gives the RMS fit of the IGS orbit
         when processed through the 7-day arc evaluation.

         "E"    stands for eclipsing satellites (earth).
         "M"    stands for eclipsing satellites (moon).
         "X"    stands for excluded from the statistics but included in IGS orbit.
         "T"    stands for Total long arc orbit RMS for all satellites.
         "NE"   stands for long arc orbit RMS for Non-Eclipsing satellites only.
         "MEDI" stands for median of the centre's satellite RMS.
         "MD"
         Units: mm.

Table 3.1686.0   GPS week: 1686   Day: 0   MJD: 56046.000                            

        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   15   10   12   11    4   14    7   14   13    4 |    34   30   28   39   24   31   24   37   37   33    30
   2  |    8   18   13   20   14    5   18   11   13   31    5 |    20   25   19   16   20   17   30   18   17   26    16
   3  |    6   12    8   14    9    5    9    7   14   14    3 |    21   23   25   24   30   21   26   17   20   16    21
   4  |    9   11   11   15    9    7   11   14   14   19    4 |    15   20   24   16   23   14   23   18   22   21    17
   5E |    9   17    9   15   16    5   16   11   10   16    4 |    17   22   19   17   18   16   23   19   14   18    16
   6  |    4   11    7   14    9    5    8    5   14   21    3 |    25   28   29   27   33   25   30   23   24   23    25
   7  |    8   14   13   18   19    4   14   10   13   16    4 |    22   31   26   26   35   23   32   23   26   27    23
   8  |    9   21    6   16   13    4   12    7   10   15    4 |    21   36   25   24   24   23   32   21   23   22    22
   9  |    9   20    8   15    9    6   14    9   12   14    4 |    22   30   20   24   25   19   30   24   21   22    21
  10E |   16   12    8   22   17    7   15   15   16   25    5 |    39   36   35   37   31   37   34   46   40   40    36
  11  |   10   12   10   10   13    4    9    8   15    9    3 |    27   29   31   26   36   26   32   22   29   26    26
  12  |    9   23    9   18   17    6   19   11   13   18    5 |    15   26   15   18   22   13   24   24   16   20    15
  13  |    9   16    9   19   20    5   13    8   11   23    4 |    15   29   25   25   35   19   29   25   18   32    21
  14  |    8   21    9   13   14    6   13   11    9   19    4 |    23   33   35   33   36   31   32   28   26   28    28
  15  |   10   21   11   15   17    5   15   13   12   24    5 |    26   29   25   27   29   18   27   22   21   20    21
  16  |    7   20    9   15   13    4   16    7   13   21    4 |    18   27   20   17   28   17   24   17   19   19    17
  17  |    9   14   10   13    8    6   14   12   16   23    4 |    24   25   31   23   30   24   29   25   24   25    25
  18E |    9   19    6   13   13    3   10    8    8   14    3 |    14   25   22   22   24   16   23   18   16   21    17
  19  |    8   13    9   12    9    5   10    6   19   22    4 |     8   15    9    9    9    6   15   10   13   11    10
  20E |    8   21    9   15   10    5   11    7    8   13    4 |    40   46   41   44   43   41   42   42   39   41    40
  21  |    9   19    9   13   15    6   15    7    9   21    4 |    22   28   19   26   23   20   27   27   21   23    20
  22E |    8   18    9   14   18    5   11    9   10   15    4 |    14   25   21   17   18   16   23   14   17   22    16
  23  |   10   18   10   18   18    3   12   11   18   22    5 |    15   28   22   22   24   17   25   23   20   23    17
 X24  |    4  ---  ---  ---  ---   24  ---  ---  ---  ---    0 |    40  ---  ---  ---  ---   36  ---  ---  ---  ---    40
  25  |    9   18    7   16   13    6   11   10   14   11    4 |    20   31   20   20   30   17   29   20   25   20    20
  26  |    6   12    7   11   15    5    8   12   13   18    3 |    34   36   37   37   42   34   39   34   29   37    35
  27  |   10   18    7   15   14    5   14   13   11   11    4 |    22   28   22   25   22   20   28   22   22   23    20
  28  |    7   15    9   16   16    6   12    9    7    9    4 |    17   27   22   20   33   18   28   17   17   18    19
  29  |    7   13    9   14   13    4   16   12   13   33    5 |    21   24   26   25   28   18   26   25   20   27    22
  30  |    8   18    7   15   10    5   13   12   13   29    4 |    17   30   19   17   24   14   27   18   17   23    18
  31  |    7   22   10   13   19    7   14   12   14   16    4 |    16   34   23   19   38   18   30   19   22   18    19
  32E |    9   21    9   20   12    6   16   15   17   19    5 |    96   87   88  102   78   91   83   95   95   80    90
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   17    9   15   14    5   13   10   13   19      |T   24   30   26   26   29   23   29   25   24   25    24
 WRMS |    8   17    9   14   13    5   12    9   11   18      |NE  21   28   23   23   28   20   27   22   21   23    21
 MEDI |    9   18    9   15   13    5   13   10   13   18      |MD  21   28   24   24   28   19   28   22   21   23    21

Table 3.1686.1   GPS week: 1686   Day: 1   MJD: 56047.000                            

        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   13    6   11   10    4   17   10   11   11    3 |    35   30   25   38   24   31   27   37   36   32    31
   2  |    7   21   10   11   11    4   20    9    8   28    4 |    19   27   14   19   17   15   27   18   15   27    16
   3  |    5   12    6   14   12    2    9    7    7   19    3 |    17   19   21   26   24   21   24   17   22   13    20
   4  |    8   11    6    7   10    5   10   14   14   19    4 |    15   21   21   15   22   17   23   16   23   21    18
   5E |    7   18    9   11   13    5   19   13   11   13    4 |    15   22   14   16   17   15   20   17   20   15    15
   6  |    6   10    6   14   10    3    8    7    8   24    3 |    20   23   24   27   27   23   28   18   27   16    23
   7  |    9   15    9   12   17    6   13   10   11   15    4 |    20   25   19   21   29   20   24   20   21   23    20
   8  |    9   23    6    8   10    3   14    9   11   16    4 |    20   34   21   23   23   20   30   24   23   25    22
   9  |    8   19    5   12   12    5   16   10    7   13    3 |    19   28   20   19   23   19   27   23   21   21    20
  10E |   15   15    6   10   12    5   14   14   12   19    4 |    35   31   30   35   28   33   30   39   35   32    32
  11  |    8   12    8    9   13    5   11    8   10   10    3 |    26   28   25   24   32   26   33   26   24   25    25
  12  |   11   23    7    9   15    6   23   13    9   18    4 |    17   27   16   16   23   15   26   23   21   21    17
  13  |   10   17    8   12   18    4   12   12   14   28    4 |    17   30   20   21   27   19   27   22   21   24    19
  14  |    7   23   10   12   13    5   14    8    8   21    4 |    17   31   27   25   28   22   28   23   18   22    22
  15  |   14   24    7   11   15    4   17   13   11   26    5 |    24   31   20   23   29   21   26   22   21   23    20
  16  |    6   20    9   13   15    6   18    7    7   22    4 |    17   30   23   21   28   23   28   20   23   20    20
  17  |    8   12   10    9    7    6   16   13   10   25    4 |    18   28   27   20   24   23   26   22   21   21    22
  18E |    9   23    7   13   21    4   14   10    7   16    4 |    12   25   17   21   22   15   19   17   15   18    15
  19  |    6   13    5   10   11    4   10    7    9   23    3 |     8   15    8    7   11    9   14   13   15   13    13
  20E |    9   15    7   11   12    4   12    7    8   19    3 |    35   38   38   34   35   36   34   36   35   41    34
  21  |    7   22    8   13   14    4   16    8   11   20    4 |    20   28   17   21   12   20   22   26   24   22    19
  22E |    7   18    8   12   17    3   13   10    7   19    4 |    12   19   17   17   16   14   20   13   15   22    15
  23  |   10   18   10   13   18    5   11   12   15   23    4 |    17   30   21   20   24   21   27   21   25   22    20
 X24  |    4  ---  ---  ---  ---   38  ---  ---  ---  ---    0 |    27  ---  ---  ---  ---   44  ---  ---  ---  ---    27
  25  |   11   13    8   10   13    5   12   10    8   10    3 |    17   25   18   19   27   17   28   23   18   19    19
  26  |    7   13    7    7   12    3   11    8    8   17    3 |    26   28   31   29   32   28   31   29   31   31    29
  27  |    8   19    5   10   14    5   15   10    9   11    3 |    18   27   20   19   21   19   26   22   20   21    19
  28  |    6   16    9   10   16    6   14    9   10   13    4 |    18   29   23   20   31   19   26   19   23   20    21
  29  |   10   13    8   10   14    4   18   11   12   33    4 |    15   20   19   17   18   15   20   19   22   21    17
  30  |    8   19    7    9   10    8   14    8    9   23    4 |    15   31   19   17   23   16   23   17   19   20    18
  31  |    5   21    9   12   20    4   15    9    8   14    4 |    13   25   21   18   36   17   25   16   17   14    17
  32E |   14   21    8   13   17    5   18   13   13   21    5 |    94   84   85   93   79   90   84   94   92   77    88
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18    8   11   14    5   15   10   10   20      |T   21   28   23   23   26   23   27   24   24   23    22
 WRMS |    8   18    8   11   13    5   14   10    8   18      |NE  19   26   20   21   24   20   25   21   22   21    20
 MEDI |    8   18    8   11   13    5   14   10    9   19      |MD  18   28   21   21   24   20   26   22   21   21    20

Table 3.1686.2   GPS week: 1686   Day: 2   MJD: 56048.000                            

        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  |   12   17    6   13   12    5   15    9   12   11    4 |    29   28   20   32   17   25   17   30   31   26    25
   2  |   13   21   11   11   11    6   17    9   12   27    5 |    18   26   12   14   16   10   23   15   19   24    13
   3  |    7   10    7   12   14    5    9    7   11   21    3 |    16   21   22   22   27   17   20   15   15   12    18
   4  |   12   11    5    8   10    7   11   15   12   21    4 |    12   17   19   17   21   14   20   15   21   19    14
   5E |   12   15    9    9   17    5   18   12   12    9    4 |    11   21   15   14   17   11   19   17   16   19    12
   6  |    7   10    8   12   12    5    8    7   12   25    4 |    20   23   25   23   29   20   23   17   16   15    20
   7  |    9   13    9   11   16    5   12   13   10   14    4 |    17   23   17   21   27   16   24   21   23   22    17
  X8  |   11   16    6    9  ---    5   12    9   11   14    4 |    14   24   14   22  ---   16   22   19   25   20    17
   9  |    9   17    7    9   12    6   16   11   16   14    4 |    19   26   19   21   23   22   29   20   28   24    20
  10E |   17   15    7   10   15    5   14   10   15   17    4 |    36   35   32   36   23   34   31   38   37   29    32
  11  |   10   16    7   10   13    3   11    7   11   11    3 |    18   27   22   22   31   19   30   19   17   23    20
  12  |   15   23   10    8   15    7   20   13    7   17    5 |    16   27   17   15   22   13   23   20   18   18    15
  13  |   10   18    9   12   18    5   14   12   14   20    4 |    13   27   23   19   29   17   24   24   17   25    18
  14  |   10   19    8   14   14    5   13    8   12   21    4 |    17   29   28   31   30   23   27   24   22   21    23
  15  |   14   21   11   10   17    4   19   11   10   27    5 |    25   28   24   21   27   19   26   22   21   28    20
  16  |    7   19    8   15   18    4   19    6   10   24    4 |    13   29   21   20   28   16   29   18   15   15    17
  17  |   11   11    8   11    8    6   13   10   11   26    4 |    13   20   21   21   20   18   23   18   23   19    17
  18E |   13   22    9   12   28    5   14   12    9   15    5 |    18   28   15   20   27   16   19   19   20   19    15
 X19  |    6  ---  ---  ---  ---  202  ---  ---  ---  ---    0 |    30  ---  ---  ---  ---  363  ---  ---  ---  ---    34
  20E |    8   18    6   11   17    4   13   12   11   21    4 |    27   32   27   29   30   27   28   29   32   32    26
  21  |    8   19   10   12   15    6   18   10    8   21    4 |    21   26   18   23   12   20   21   27   21   25    18
  22E |    8   16    9   16   17    4   11   11    6   15    4 |    11   21   17   19   22   13   19   15   16   19    13
  23  |   11   18   10   12   15    6   12   11   13   18    4 |    11   27   21   17   22   15   23   17   15   18    15
 X24  |    6  ---  ---  ---  ---  101  ---  ---  ---  ---    0 |    31  ---  ---  ---  ---   59  ---  ---  ---  ---    30
  25  |   11   12    7   12   15    4   11    9    8    9    3 |    19   21   18   19   23   14   23   17   19   16    16
  26  |    9   12    9    6   15    4   12    9   22   14    4 |    26   28   32   27   33   29   32   26   38   29    28
  27  |   11   17    6   10   30    7   16   10   15   13    5 |    16   26   18   15   19   19   26   19   23   21    16
  28  |    7   13    7    9   17    5   11    8   10   16    3 |    12   22   16   16   27   14   21   14   18   13    14
  29  |   15   14    9   11   15    5   19    9    9   33    5 |    21   24   21   21   22   19   24   22   21   24    19
  30  |    8   15    7    9   12    6   15    7    8   17    3 |    13   26   15   16   20   12   23   16   13   19    15
  31  |    9   19    6   12   19    4   12    9   11   15    4 |    15   27   21   19   35   17   26   17   17   16    17
  32E |   14   18    9   13   17    7   16    9   14   22    5 |    83   75   78   86   67   81   74   86   83   69    79
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   17    8   11   16    5   14   10   12   19      |T   20   27   22   23   25   32   25   22   23   22    21
 WRMS |   10   17    8   11   16    5   14   10   10   18      |NE  18   25   20   20   24   32   24   19   20   20    19
 MEDI |   10   16    8   11   15    5   13    9   11   17      |MD  17   26   20   21   23   17   23   19   20   20    17

Table 3.1686.3   GPS week: 1686   Day: 3   MJD: 56049.000                            

        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   11   11   14    6   12   11   10   12    4 |    35   31   29   35   26   31   25   35   35   32    30
   2  |    9   21   12   11   11    5   18   11   13   31    5 |    13   26   18   17   17   11   24   14   17   23    13
   3  |    7   10    9   13   15    5   10   12   14   21    4 |    16   21   24   27   27   20   22   19   25   16    20
   4  |    7   12    6    7    9    4   11   13    9   25    3 |    16   20   22   17   27   17   21   14   20   20    17
   5E |    7   15    7   13   14    5   17   13   11   14    4 |    14   23   17   21   16   14   21   17   15   16    15
   6  |    6   10    8   13   13    4    9   11   14   23    4 |    19   24   26   31   33   24   27   22   29   21    24
   7  |   10   15    8   12   17    4   15   15   11   14    4 |    13   24   17   15   24   15   23   21   18   22    15
  X8  |    7   20    9    7  ---    6   13   13   11   14    4 |    16   28   18   18  ---   16   25   18   19   17    16
   9  |    7   20    7   10   13    5   15   12   10   15    4 |    20   27   26   21   23   19   27   27   27   22    23
  10E |   15   14    9   15   16    5   16   16   15   15    5 |    35   31   30   38   21   32   29   38   36   27    30
  11  |    9   14    6   10   15    4    9    8   12   13    3 |    29   35   35   32   39   32   35   30   34   32    32
  12  |   15   23    8   10   21    5   23   10    9   18    5 |    18   30   20   15   26   17   28   19   20   22    18
  13  |    8   17    7   13   18    6   14   15   11   18    4 |    11   28   20   20   28   14   23   24   16   24    16
  14  |    9   21    9   12   15    4   12   10   10   19    4 |    25   32   34   32   35   29   31   28   24   26    27
  15  |   10   22   11    9   17    6   18    9   10   22    4 |    25   30   27   24   29   21   26   21   19   21    21
  16  |    5   19   10   11   19    4   16   10   10   23    4 |    22   32   24   21   36   26   32   27   27   25    23
  17  |   10   14   12   12    8    5   15   12   13   27    4 |    23   25   31   23   27   24   25   24   23   21    23
  18E |   11   16    9   12   17    4   12   13   11   16    4 |    19   20   21   21   21   14   19   16   16   19    15
 X19  |    9  ---    7    8   13    4  ---   12   14   23    4 |     7  ---   21   18   22   38  ---   16   15   16    14
  20E |    7   20    8   10   19    3   12   15    8   20    4 |    53   57   53   51   54   53   54   54   53   55    52
  21  |    9   24    8   11   15    5   15   10   10   25    4 |    20   33   17   22   14   17   21   26   23   22    18
  22E |    7   21   11   14   16    4   12   14    9   18    4 |    11   23   24   21   20   14   18   14   12   21    15
  23  |    7   19    9   11   14    4   13   12   14   18    4 |    16   30   23   21   23   18   23   20   19   20    18
 X24  |    5  ---  ---  ---  ---   88  ---  ---  ---  ---    0 |    33  ---  ---  ---  ---   48  ---  ---  ---  ---    32
  25  |    6   16   10   13   15    3   11   12   10   13    4 |    16   27   23   23   27   17   25   16   19   17    17
  26  |    7   10    7    8    9    5   10   11    8   14    3 |    26   29   30   32   30   27   29   32   29   31    28
  27  |    7   17    7    8   20    5   13    8    9   13    3 |    18   26   24   20   30   19   25   22   22   23    21
  28  |    7   16    8   11   21    7   11   11    8   17    4 |    15   24   17   18   33   12   21   14   14   15    14
  29  |   13   15    8   13   17    5   18   14    5   34    5 |    17   24   20   22   24   15   22   24   19   25    17
  30  |    8   17    5    9   15    5   13    8    8   16    3 |    11   26   15   18   21   12   23   15   19   18    15
  31  |    6   24    6    9   19    4   10   12   11   13    4 |    16   31   23   20   34   19   27   17   20   16    19
  32E |   16   19    9   21   21    6   17   19   15   21    6 |    86   86   78   86   69   82   75   90   85   72    81
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18    9   12   16    5   14   12   11   20      |T   22   30   26   25   28   23   27   24   24   24    23
 WRMS |    9   18    9   11   14    5   14   11    9   17      |NE  19   27   23   22   27   21   25   21   22   21    20
 MEDI |    7   17    8   11   15    5   13   12   10   18      |MD  18   27   23   21   27   19   25   21   20   22    18

Table 3.1686.4   GPS week: 1686   Day: 4   MJD: 56050.000                            

        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   17    6   16   14    3   13   11   12   14    4 |    32   30   29   35   24   31   21   34   35   30    29
   2  |   10   21    9   15   12    4   22   10   11   29    5 |    13   25   14   12   16   11   24   14   14   26    11
   3  |    7   10    6   15   17    2   10    8   12   20    4 |    15   20   24   19   29   18   21   17   22   16    19
   4  |   10   13    6   13   13    5   13    9   11   22    4 |    15   18   22   18   22   17   19   17   22   21    16
   5E |    9   16    7   11   16    3   19   12    9   12    4 |    13   22   21   18   19   15   22   21   16   23    16
   6  |    8    9    7   14   13    3    9    8   10   19    3 |    19   24   27   20   30   21   25   20   22   19    22
   7  |    9   15    7   13   20    4   14   15   15   12    4 |    13   21   14   12   25   12   19   18   17   19    12
   8  |    6   19    6   10   13    4   15   11    9   12    3 |    14   28   18   15   21   16   25   19   16   18    14
   9  |    7   22    5   13   13    4   13   11   11   12    4 |    11   24   13   15   20   11   20   15   15   13    12
  10E |   17   17    7   15   15    6   18   16   17   17    5 |    36   36   33   37   26   33   29   40   38   32    32
  11  |   10   15    8   11   17    3   12    8   14   12    4 |    26   31   31   27   34   27   31   23   26   27    26
  12  |   11   26    7   12   22    4   25    8   11   14    5 |    14   29   16   14   24   12   27   16   16   15    14
  13  |    5   19    9   15   21    4   16   16   16   16    5 |    16   30   16   20   30   17   27   23   15   21    16
  14  |    8   24    7   13   15    5   16   11   13   19    4 |    18   30   25   25   29   23   26   20   19   19    19
  15  |    7   24    8   11   15    5   19    9   10   15    4 |    20   30   19   16   23   15   23   20   16   17    16
  16  |    7   21    9   12   19    4   13    8   12   22    4 |    12   24   17   15   28   14   20   14   20   15    14
  17  |   12   14    8   16   10    5   16   11   12   23    4 |    18   25   28   25   26   23   25   26   21   21    21
  18E |    8   19    6   12   18    5   12   14   11   18    4 |    14   24   17   19   18   16   18   23   20   25    16
  19  |    6   12    7   10   13    3   10   10   13   23    4 |    13   14   17   14   16   32   17   14   14   14    16
  20E |    9   22   10   15   17    5   14   10   16   12    4 |    34   34   32   35   31   33   34   35   38   33    33
  21  |    9   23   10   13   14    5   16   10   12   22    4 |    18   25   13   19   10   15   18   23   21   22    14
  22E |    9   20    9   13   13    5   14   13   10   17    4 |    12   22   18   21   16   14   19   18   18   22    14
  23  |    8   21   10   17   21    4   13   10   16   17    5 |    16   28   17   24   23   17   23   20   20   21    16
 X24  |    5  ---  ---  ---  ---   79  ---  ---  ---  ---    0 |    28  ---  ---  ---  ---   50  ---  ---  ---  ---    27
  25  |    8   16    6   15   17    4   13   12    9   11    4 |    15   24   19   15   27   16   25   17   16   17    14
  26  |    7   13    6    8   12    4   13   11   12   15    3 |    19   25   25   23   26   22   27   29   26   28    23
  27  |    8   22    6   12   14    5   11   11   10   12    4 |    10   25   16   20   19   12   21   18   14   15    14
  28  |    6   16    7   11   19    5   14    7   10   12    3 |    13   27   19   16   31   16   22   17   16   18    15
  29  |    7   16    7   12   16    6   19   14    9   31    5 |    15   21   16   18   22   14   20   24   21   24    16
  30  |    7   20    6   14   13    4   13    9   11   15    4 |    14   30   16   19   22   15   25   20   19   24    16
  31  |   11   25    7   14   22    5   12   10   14   13    4 |    14   31   19   14   34   15   25   14   17   14    15
 X32E |   15  ---   12   16   23    6   20   24   20   24    7 |    87  ---   78   89   70   83   74   95   91   70    82
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19    7   13   16    4   15   11   12   18      |T   19   25   22   22   25   21   24   23   22   22    20
 WRMS |    8   19    7   14   15    4   15   10   11   17      |NE  16   25   19   18   24   18   23   19   19   19    17
 MEDI |    8   19    7   13   15    4   14   11   12   16      |MD  15   25   19   19   24   16   23   20   19   21    16

Table 3.1686.5   GPS week: 1686   Day: 5   MJD: 56051.000                            

        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   14    5   12   18    4   18   14   11   13    4 |    30   27   24   32   25   28   24   33   30   26    26
   2  |    8   19    8   12   14    4   20    8   13   31    5 |    13   26   16   16   21   14   27   13   19   25    14
   3  |    8   11    8   10   18    5    9   10   11   22    4 |    14   18   21   15   26   15   20   11   17   10    16
   4  |    8   11    7   11   14    5    9   10   11   19    3 |    14   20   20   12   23   15   21   16   22   17    16
   5E |    8   17    7    7   19    3   15   12   12   12    4 |    19   27   21   18   25   16   23   17   19   20    19
   6  |    8    9    9    9   16    4    8    9   12   18    3 |    17   23   24   18   29   18   23   15   19   12    19
   7  |   11   14   12   13   18    2   13   12   11   13    4 |    12   22   16   15   26   13   19   16   18   18    14
   8  |    8   18    6    9   14    5   15   12    9   13    3 |    16   28   18   20   19   17   25   20   20   18    18
   9  |    7   17    4    9   12    4   14   13    9   10    3 |    17   26   18   19   21   16   24   22   18   17    18
  10E |   13   18    9   14   23    5   14   20   18   15    5 |    37   33   28   38   35   34   30   38   40   27    32
  11  |    9   14    8   11   17    4   12   11   12   15    4 |    27   36   32   30   41   29   35   25   29   27    29
  12  |   13   26    6   12   21    4   25   11    9   18    5 |    14   28   14   15   22   13   26   16   17   18    14
  13  |    7   16   11   13   22    4   14   15   14   16    4 |    12   27   21   15   31   15   26   21   17   19    16
  14  |    8   24    8   10   17    4   14   13   12   18    4 |    19   29   26   22   30   20   24   20   18   19    20
  15  |   12   24   11    8   19    4   23    9   10   13    5 |    29   31   27   24   29   22   28   23   21   20    23
  16  |    8   19   13   11   19    4   16    8   14   21    4 |    16   26   22   14   29   19   24   17   22   16    18
  17  |    8   11    6   13    9    6   15   12   12   23    4 |    18   25   22   20   25   18   23   27   26   18    20
  18E |    8   14    8    9   13    5   13   14   13   19    4 |    14   18   16   15   17   12   16   16   20   23    14
  19  |    7   13    6    8   16    4   11   11   10   24    4 |    14   14   17   14   20   25   13   14   15   16    14
  20E |    9   25   10   10   16    6   13   12    8   17    4 |    34   43   33   35   35   34   35   35   30   39    33
  21  |   11   19   10    9   16    6   14   11   16   24    4 |    21   23   15   21   13   18   16   27   24   25    17
  22E |    8   17    7   10   20    6   12   16    8   20    4 |    14   21   19   18   22   14   18   13   19   19    14
  23  |    8   18    9   14   21    4   11   11    9   18    4 |    18   30   22   21   24   19   26   19   25   23    20
 X24  |    4  ---  ---  ---  ---   70  ---  ---  ---  ---    0 |    22  ---  ---  ---  ---   33  ---  ---  ---  ---    22
  25  |    7   15    5   10   16    4   13    9    9   10    3 |    16   22   18   17   24   17   23   19   20   19    16
  26  |    6   12    9    5   12    4   12    9   12   14    3 |    23   26   26   25   28   23   27   24   19   27    23
  27  |    8   16    5    7   14    4   13   11   11   12    3 |    18   26   19   20   24   18   24   22   18   18    19
  28  |    6   15    7   12   21    5   13   10    8   15    4 |    13   24   16   17   31   14   20   18   16   16    15
  29  |   10   17    6   11   14    5   17   15   11   33    5 |    14   22   10   12   19   11   21   21   17   23    14
  30  |    9   18    5   10   16    4   16   10   15   22    4 |    16   31   19   18   25   17   25   23   27   31    20
  31  |    7   20    7   11   21    4   15   12   13   13    4 |    12   27   21   16   35   15   24   17   20   15    16
 X32E |   14  ---   16   16   25    6   21   36   27   23    8 |    85  ---   77   86   73   85   76  102   94   71    83
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   17    8   11   17    4   15   12   12   18      |T   20   25   22   21   27   21   25   23   23   22    21
 WRMS |    9   17    8   10   16    4   15   11   10   17      |NE  17   25   20   18   25   18   23   19   20   19    18
 MEDI |    8   17    8   10   17    4   14   11   11   18      |MD  16   26   21   18   25   17   24   20   20   19    18

Table 3.1686.6   GPS week: 1686   Day: 6   MJD: 56052.000                            

        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   12    6   10   14    4   14   16    9   15    3 |    32   30   29   35   32   29   28   34   33   30    29
   2  |   11   20    9    8   13    5   19   11    9   32    5 |    17   30   17   18   22   14   29   17   13   24    15
   3  |    6   10    4    9   14    4    9    9   12   19    3 |    20   27   27   25   36   22   27   20   22   18    23
   4  |   10   10    6    7   14    4    9   14    8   21    3 |    19   23   25   21   32   21   24   24   25   25    21
   5E |   11   18    9    9   16    3   14   22    9   16    4 |    19   23   20   23   24   19   20   26   18   20    19
   6  |    7    8    5    9   13    5    8    8    9   17    3 |    25   32   32   31   40   27   32   26   28   22    29
   7  |    8   14    7    9   18    3   12   11   12   16    4 |    14   22   14   17   25   13   22   14   15   19    13
   8  |    9   18    5    7   11    4   12   11    8   14    3 |    13   26   16   21   14   15   25   19   19   18    16
   9  |    9   18    5    8   10    4   16   12    8   18    3 |    21   28   21   18   23   18   27   18   19   23    18
  10E |   16   17    8   16   19    5   18   24   20   17    6 |    39   36   33   44   29   36   34   45   42   33    35
  11  |    9   14    7    8   16    4   11    9   17   14    4 |    35   45   41   36   54   36   47   33   32   36    38
  12  |   11   24    7   11   21    5   26   10    9   18    5 |    18   32   19   17   29   16   30   16   20   19    16
  13  |    8   18    7    9   19    4   12   16   13   19    4 |    18   32   21   22   33   20   30   26   21   24    20
  14  |    6   22   10    9   10    4   15   12    8   20    4 |    23   33   33   30   32   29   29   25   27   25    26
  15  |   10   22   10    7   17    4   19   11    9   16    4 |    27   31   26   22   32   22   25   23   19   20    22
  16  |    8   17    9    7   16    3   13    8    8   21    4 |    19   28   24   19   32   21   27   25   23   22    21
  17  |   12   11    9   14    8    4   12   12    9   26    4 |    23   29   38   36   35   30   30   34   31   27    30
  18E |    8   15    7    8   14    3   14   16    8   23    4 |    17   23   20   19   22   15   20   20   13   25    17
  19  |    5   11    5   10   12    3   13    9   14   26    4 |    15   18   19   17   24   36   18   14   16   19    18
  20E |    9   17    7   10   18    4   11   13   11   21    4 |    35   38   33   33   35   34   33   36   34   41    32
  21  |    9   19    8    8   11    3   16    9    9   26    4 |    24   25   16   22   11   19   21   27   24   31    18
  22E |    7   17    8    9   15    5   12   20    7   24    4 |    18   23   21   23   21   17   22   26   17   29    19
  23  |    8   19    8   11   16    4   13   15   11   21    4 |    17   30   19   23   26   19   27   21   18   22    18
 X24  |    6  ---  ---  ---  ---   28  ---  ---  ---  ---    0 |    26  ---  ---  ---  ---   34  ---  ---  ---  ---    24
  25  |    7   13    7    9   17    4   10   13    7   11    3 |    18   24   22   18   24   18   25   20   20   19    17
  26  |    7   11    9   10   10    3   15    8    7   17    3 |    23   24   29   27   27   22   26   23   21   26    23
  27  |    9   15    3    9   13    5   14   10   12   21    3 |    20   24   20   18   24   18   24   17   23   25    17
  28  |    7   14    8    8   19    3   11   10    5   16    3 |    14   23   19   20   30   15   24   20   18   19    17
  29  |   10   16    6    8   17    6   17   15    9   34    4 |    20   27   22   23   31   19   25   28   21   33    21
  30  |   10   18    6   10   12    4   13   13   10   27    4 |    13   29   15   21   20   12   24   16   12   31    15
  31  |   11   19    6    8   20    4   10   13    9   15    4 |    15   28   21   18   34   16   25   18   13   15    17
  32E |   14   24    8   10   20    8   15   17   22   19    5 |   119  115  109  118  108  114  112  121  115  106   114
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   17    7    9   15    4   14   13   11   21      |T   24   30   26   26   31   24   29   26   24   27    24
 WRMS |    9   17    7    9   14    4   14   12    9   21      |NE  20   28   23   23   28   21   26   22   21   23    20
 MEDI |    9   17    7    9   15    4   13   12    9   19      |MD  19   28   21   22   29   19   26   23   21   24    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 4.1686   GPS week: 1686   MJD: 56046.0-56052.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3046 |U    7     6    17 |U    6     7    23 |U   12    13    23 |
emr | emr 2914 |    11     7    20 |U   10    13    29 |    14    14    26 |
esa | esa 2962 |     7     6    17 |U    6     7    24 |    10    12    21 |
gfz | gfz 2954 |U    7     6    17 |U    8    13    35 |U   11    12    21 |
grg | grg 2934 |     9     8    25 |U   12    18    45 |    14    20    29 |
igr | igr 2948 |     8     6    18 |     6     7    22 |    11    13    22 |
igs | igs 2932 |     7     6    17 |     7    10    26 |    12    14    23 |
jpl | jpl 2939 |     9     6    19 |U    9    17    32 |    15    16    35 |
mit | mit 2962 |     8     8    21 |U   16    24    68 |    14    15    23 |



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 5.1686.0   GPS week: 1686   Day: 0   MJD: 56046.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3060 |     7     9    22 |     6     4    24 |     9    10    21 |
emr | emr 2968 |    12    12    22 |    11    13    24 |    20    17    18 |
esa | esa 2976 |     6     8    19 |     6     4    23 |     7    12    15 |
gfz | gfz 2968 |     6     8    19 |     6     5    23 |     9     9    15 |
grg | grg 2976 |     7     9    22 |    11    12    43 |    13    12    20 |
igr | igr 2976 |     6     8    19 |     6     4    22 |     7    10    16 |
igs | igs 2940 |     6     8    19 |     7     4    25 |    10    10    18 |
jpl | jpl 2966 |     6     7    20 |     9    16    30 |    22    13    28 |
mit | mit 2976 |     6     7    22 |    13    15    46 |    11    13    16 |

Table 5.1686.1   GPS week: 1686   Day: 1   MJD: 56047.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3065 |     5     5    20 |     5     7    20 |     8    17    17 |
emr | emr 2968 |     8     9    24 |     7     8    33 |    10    12    17 |
esa | esa 2976 |     6     6    20 |     5     7    21 |     8    16    17 |
gfz | gfz 2968 |     5     7    20 |     7    14    31 |     7    16    15 |
grg | grg 2976 |     8     8    22 |    12    19    49 |    11    23    23 |
igr | igr 2976 |     5     6    19 |     5     6    21 |     8    17    16 |
igs | igs 2911 |     5     6    19 |     5     7    21 |    10    21    18 |
jpl | jpl 2968 |     7     7    20 |     7     8    23 |    11    16    19 |
mit | mit 2976 |     5     8    20 |    12    20    45 |    10    19    18 |

Table 5.1686.2   GPS week: 1686   Day: 2   MJD: 56048.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2963 |     8    10    26 |     6     8    23 |    37    29    62 |
emr | emr 2872 |    10     8    31 |    11    20    24 |    33    26    63 |
esa | esa 2880 |     9     9    27 |     7     8    24 |    29    24    52 |
gfz | gfz 2873 |     9     9    27 |     9    20    36 |    33    24    58 |
grg | grg 2783 |    12    10    41 |    14    25    32 |    41    28    71 |
igr | igr 2783 |     9    10    28 |     7     8    22 |    34    27    60 |
igs | igs 2859 |     8     8    27 |     9    17    23 |    36    27    62 |
jpl | jpl 2872 |     9     9    26 |    11    23    28 |    45    45   114 |
mit | mit 2880 |     8     9    28 |    39    56   217 |    40    30    60 |

Table 5.1686.3   GPS week: 1686   Day: 3   MJD: 56049.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3063 |    11     6    15 |     6     6    29 |     5     8    12 |
emr | emr 2872 |    12     7    20 |    11    18    34 |     6     8    22 |
esa | esa 2976 |    12     6    17 |     6     8    27 |     4     7    12 |
gfz | gfz 2968 |    11     6    17 |    13    24    66 |     4     7    13 |
grg | grg 2879 |    12     7    24 |    10    20    41 |     7    11    20 |
igr | igr 2975 |    12     7    18 |     5     7    25 |     4     8    12 |
igs | igs 2955 |    11     6    18 |     8    13    32 |     4     8    11 |
jpl | jpl 2872 |    12     7    21 |    12    26    48 |     5    10    18 |
mit | mit 2976 |    11     7    19 |    10    19    41 |     6     9    11 |

Table 5.1686.4   GPS week: 1686   Day: 4   MJD: 56050.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3055 |     5     4    13 |     5     6    19 |     8    13    18 |
emr | emr 2876 |     7     6    16 |     9    10    23 |    10    18    18 |
esa | esa 2976 |     5     4    16 |     6     7    18 |     8    10    18 |
gfz | gfz 2968 |     4     4    15 |     7    13    32 |     9    12    17 |
grg | grg 2976 |    10    12    32 |    11    12    44 |    10    38    24 |
igr | igr 2976 |     5     5    15 |     6     7    18 |     8    14    15 |
igs | igs 2968 |     6     4    14 |     8     9    33 |     9    16    17 |
jpl | jpl 2968 |     5     4    17 |     8    11    24 |     8    14    21 |
mit | mit 2976 |    10    10    26 |    11    18    41 |    12    14    21 |

Table 5.1686.5   GPS week: 1686   Day: 5   MJD: 56051.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3057 |     6     5    14 |     6     9    21 |     7     9    16 |
emr | emr 2876 |    21     6    17 |    10    11    25 |     8    10    22 |
esa | esa 2976 |    11     5    13 |     6     9    24 |     6     9    20 |
gfz | gfz 2968 |    10     5    13 |     6    10    22 |     6     9    17 |
grg | grg 2976 |     6     8    19 |    12    15    43 |     9    13    27 |
igr | igr 2976 |    16     5    16 |     6     9    23 |     6     9    20 |
igs | igs 2940 |    12     5    13 |     7     9    21 |     6     9    18 |
jpl | jpl 2966 |    18     4    18 |     9    17    31 |     7    10    23 |
mit | mit 2976 |    10     8    15 |    12    18    45 |     8    10    23 |

Table 5.1686.6   GPS week: 1686   Day: 6   MJD: 56052.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3063 |     4     7    11 |     7     7    27 |     7     7    18 |
emr | emr 2968 |     6     5    13 |    12    10    40 |     8     9    23 |
esa | esa 2976 |     3     4    10 |     7     9    27 |     7     7    15 |
gfz | gfz 2967 |     4     5    10 |     9     9    34 |     7    10    14 |
grg | grg 2975 |     6     6    16 |    14    23    61 |     9    13    20 |
igr | igr 2976 |     3     4     9 |     7     9    27 |     7     6    15 |
igs | igs 2953 |     3     3     9 |     8    10    26 |     6     7    16 |
jpl | jpl 2967 |     3     4    12 |    11    17    40 |     7     6    20 |
mit | mit 2976 |     5     5    14 |    13    23    40 |     7    10    15 |


Table 6: Earth Orientation Parameters weekly summary.                          
                                                                              
        Weekly mean and standard deviation of Centre ERP, ERP rates and       
        LOD differences with respect to IGS combined values. See Table 7 for  
        the daily summaries.                                                  
                                                                              
        Xpole,Xrt: x pole and x pole rate                          
        Ypole,Yrt: y pole and y pole rate                       
        LOD      : Length Of Day                                               
                                                                              
        AC LOD BIAS    : 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 6.1686   GPS week: 1686   MJD: 56046.500-56052.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      -8     -34      47    -148      5 |       3     17
            |      30      16     133      75      9 |       2
emr   uuuuu |      36       5      59     135    -21 |      41     46
            |      22      15      81     126      7 |       7
esa   uuuuu |     -13      -9      86      -4      0 |      11     19
            |      10      13      50      93      6 |       1
gfz   uuuuu |     -24      -9     157    -163      3 |      10     18
            |       8       9      71      47      3 |       1
grg   uuuux |      13     -14     110    -170      3 |      -8     22
            |      10      14      42      78     33 |       7
igr   xxxxx |     -22     -11      42     -52      8 |      -2     15
            |      14      16      45      35      5 |       2
irf   xxxxx |      -5      -5      25     -30      3 |       0     14
            |       7       4      22      66      2 |       2
jpl   uuuuu |     -30       6     -57     -61     -7 |      37     41
            |      33      16      54      69     15 |       3
mit   uuuuu |      -9      -3    -126     112     -1 |      13     20
            |      12       6      62      83      3 |       1
ngs   uuuuu |       8      15     -82      62      0 |       6     15
            |      46      44     153     116      7 |       2
sio   uuuuu |      83      28    -244     110      3 |      44     47
            |      10      13      67      82      4 |       1


Table 7.1686.0   GPS week: 1686   Day: 0   MJD: 56046.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      18     -49     220    -107     14 |       0     18
emr   uuuuu |      34     -18     107     226    -14 |      48     51
esa   uuuuu |     -23     -12     102     -62      9 |       9     19
gfz   uuuuu |     -16     -28     228    -105      3 |       9     18
grg   uuuux |      25     -37     162     -44     11 |     -20     36
igr   xxxxx |     -40      -4      20     -11      7 |      -5     16
irf   xxxxx |      -8      -3       9      57      4 |      -1     15
jpl   uuuuu |      33     -14      -8      -1     16 |      32     38
mit   uuuuu |     -16      -1     -45     -21     -2 |      14     22
ngs   uuuuu |     -44      97    -356     132    -10 |       7     16
sio   uuuuu |      72      12    -214     -49      6 |      42     45

Table 7.1686.1   GPS week: 1686   Day: 1   MJD: 56047.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      -8      -5      48     -14     13 |       3     18
emr   uuuuu |      27      -1     199      69    -11 |      48     51
esa   uuuuu |      -1      -6     161      75      5 |      12     20
gfz   uuuuu |     -24      -2     164    -125      4 |      11     19
grg   uuuux |      16      -1     137    -124     10 |     -15     31
igr   xxxxx |     -21     -19      93     -85     16 |      -2     15
irf   xxxxx |      10      -7       8      66      4 |       2     15
jpl   uuuuu |      -6      18     -84      53      3 |      38     42
mit   uuuuu |      14     -14    -170      85     -2 |      15     22
ngs   uuuuu |     -51       7    -174    -108     -5 |       8     16
sio   uuuuu |      98      17    -307      65      4 |      45     48

Table 7.1686.2   GPS week: 1686   Day: 2   MJD: 56048.500

                                                         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 |      32     -26      81    -217      4 |       4     19
emr   uuuuu |       8      14     -19      92    -18 |      47     50
esa   uuuuu |     -18     -31      74    -124     -1 |      12     20
gfz   uuuuu |     -17      -5      99    -165      3 |      10     19
grg   uuuux |      17     -13     127    -150     31 |      -8     23
igr   xxxxx |     -22     -18      66     -85     10 |      -1     16
irf   xxxxx |      -4     -10      27     -55      2 |       2     15
jpl   uuuuu |     -53      27     -28     -69      3 |      39     43
mit   uuuuu |      -2      -4    -162     140      1 |      14     21
ngs   uuuuu |      26      25     105     180     -1 |       8     16
sio   uuuuu |      92      22    -295     147      3 |      45     48

Table 7.1686.3   GPS week: 1686   Day: 3   MJD: 56049.500

                                                         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 |     -23     -31      50    -132      7 |       2     19
emr   uuuuu |      55      19      77     256    -27 |      42     47
esa   uuuuu |     -24     -10     138      -3     -2 |      10     20
gfz   uuuuu |     -25      -3      74    -233      9 |       9     19
grg   uuuux |      12       1      30    -231     25 |      -1     11
igr   xxxxx |     -32     -12       4     -43     -1 |      -3     16
irf   xxxxx |     -13       0      32     -31      3 |      -1     15
jpl   uuuuu |     -37      -3     -70     -82    -11 |      38     42
mit   uuuuu |     -18       6    -127     255     -2 |      12     21
ngs   uuuuu |      33     -15     -21     -82      0 |       5     15
sio   uuuuu |      75      47    -275     202      4 |      44     47

Table 7.1686.4   GPS week: 1686   Day: 4   MJD: 56050.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       8     -42      11    -190      7 |       5     16
emr   uuuuu |      72      21     -30     267    -21 |      41     47
esa   uuuuu |      -8      12      36     -97     -2 |      12     19
gfz   uuuuu |     -33      -7     248    -158      3 |      12     18
grg   uuuux |       7      -7      96    -201    -35 |       1     12
igr   xxxxx |     -30      20      12     -11      9 |      -1     13
irf   xxxxx |      -7      -2      69     -80      6 |       0     14
jpl   uuuuu |     -50      -9     -58     -64    -17 |      40     43
mit   uuuuu |     -16       3     -40      95      3 |      14     20
ngs   uuuuu |       7     -47    -133     157      1 |       6     15
sio   uuuuu |      86      44    -130     110      5 |      46     48

Table 7.1686.5   GPS week: 1686   Day: 5   MJD: 56051.500

                                                         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 |     -56     -31     131    -235      1 |       3     15
emr   uuuuu |      41     -11      75     125    -32 |      34     40
esa   uuuuu |     -18       0      28      67     -1 |      10     17
gfz   uuuuu |     -37     -10     198    -215      4 |      10     16
grg   uuuux |      -7     -11     116    -285    -53 |      -5     18
igr   xxxxx |      -4     -30     103     -91     11 |      -1     13
irf   xxxxx |      -9      -2      20    -105      5 |      -2     13
jpl   uuuuu |     -65       1    -156    -159    -27 |      36     40
mit   uuuuu |     -16      -5    -140     141      3 |      11     18
ngs   uuuuu |      81      17      -6     112      2 |       3     12
sio   uuuuu |      74      28    -191     133      2 |      43     45

Table 7.1686.6   GPS week: 1686   Day: 6   MJD: 56052.500

                                                         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 |     -25     -52    -211    -143    -14 |       5     15
emr   uuuuu |      16       9       7     -87    -24 |      29     36
esa   uuuuu |       0     -15      65     114    -10 |      10     18
gfz   uuuuu |     -18      -6      85    -137     -2 |      12     17
grg   uuuux |      19     -27     102    -158     29 |     -10     25
igr   xxxxx |      -5     -16      -5     -35      4 |       1     13
irf   xxxxx |      -7      -9      10     -60      0 |      -2     13
jpl   uuuuu |     -35      21       5    -104    -14 |      35     39
mit   uuuuu |     -13      -2    -200      92     -6 |      12     18
ngs   uuuuu |       6      22      14      44     12 |       2     12
sio   uuuuu |      86      25    -296     163     -5 |      44     46



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