[IGSREPORT-25048] Wk 1931 IGS Final Orbits

acc at igs.org acc at igs.org
Wed Feb 1 02:48:53 PST 2017


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 1931   (Jan 08, 2017 - Jan 14, 2017)

Contacts: acc at igs.org


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 at each SP3 epoch. 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 with broadcast GPS time, the IGS clocks use
the linear combination of phase-smoothed P1 and P2 pseudorange data to remove
the 1st order ionospheric delay, with no other delay calibrations 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 over each daily arc. 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 10 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:

igs1931[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1931[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1931[0-6].cls  IGS GPS clock combination summary report.
igs19317.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs19317.sum      Complete report.

    
REMARKS concerning the IGS Orbit Combination:                                  
---------------------------------------------

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, GRG, MIT, and
    JPL. The other centres are excluded because of poorer consistency, they provide
    broadcast clocks, or clock corrections are not provided (SIO). The clock
    information not used is still compared to the combination for completeness. The
    value of 999999.999999 microseconds, according to the SP3 format convention,
    signifies that no clock solution is available and therefore must not be used.
    
    In general, if an AC does not contribute to the terrestrial reference frame
    (i.e. the SINEX combination), then any corresponding orbits & clocks
    contributed from that AC should not be included with weight in this
    combination. This is done to ensure a high level of consistency between the TRF
    and the orbital frame. However, there is an exception for the clocks if the AC
    is the reference center. In that case, only the clocks from that AC are
    included with weight.
    
    Starting week 1707:
      cod = cof${wwww}[0-6].[clk,snx,sp3] & cod = cof${wwww}7.[erp,sum]

 2. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1582, a new orbit solution from CNES/GRGS (GRG) is included with
    weight. GRG clocks are included with weight starting 12-Aug-2012 (GPS Week
    1701, day 0, MJD 56151), after a procedural change to generate estimates in
    the center-of-figure frame instead of the center-of-mass frame. GRG LOD
    estimates are included for comparison only.

 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   | FAIR MAL2 SYOG FAIR MAL2 SYOG
                0  |  EMR   | SYOG
                0  |  ESA   | DRAG TIXI
                0  |  GFZ   | DRAG HERS MAL2 REUN CEDU FAA1 HERS MAL2 REUN
                0  |  GRG   | 21 21 FAIR GLSV KIRU NRMD DRAG FAA1 FAIR GLSV MAW1
                0  |  GRG   | SYOG
                0  |  JPL   | TUVA
                1  |  COD   | NRIL SYOG DAV1 MAG0 NRIL SYOG
                1  |  ESA   | ALRT ALRT
                1  |  GFZ   | FAA1 GODE FAA1 GODE
                1  |  GRG   | FAA1 GLSV NRIL SYOG DAV1 FAA1 GLSV LHAZ MAL2 NRIL
                1  |  GRG   | SYOG
                1  |  JPL   | MCM4
                1  |  MIT   | DAV1 NYAL
                2  |  COD   | NRMD
                2  |  ESA   | MAL2 MAL2
                2  |  GFZ   | DAV1 GMSD GODE MAL2 MAW1 CEDU DAV1 GMSD GODE MAL2
                2  |  GFZ   | MAW1
                2  |  GRG   | 21 21 DGAR MAW1 DUBO MAW1
                2  |  MIT   | DAV1 DAV1
                3  |  COD   | MAL2 MAL2
                3  |  EMR   | BJNM
                3  |  ESA   | HOB2
                3  |  GFZ   | BJNM FAA1 GMSD GODE MAL2 BJNM FAA1 GMSD GODE MAL2
                3  |  GRG   | CHTI DAV1 GLSV CHTI DAV1 GLSV
                3  |  JPL   | SEYG TUVA
                4  |  COD   | FAA1 FAA1
                4  |  ESA   | MAL2 DAV1 MAL2
                4  |  GFZ   | CHTI FAA1 GODE MAL2 REUN BOGT CHTI DAV1 FAA1 GODE
                4  |  GFZ   | MAL2 REUN
                4  |  GRG   | 13 13 BOGT CHTI GLSV SYOG CHTI GLSV SYOG
                4  |  JPL   | TUVA
                5  |  COD   | HOLM MAL2 NRMD SYOG HOLM MAL2 NRMD
                5  |  EMR   | SYOG
                5  |  ESA   | BOGT BOGT
                5  |  GFZ   | BJNM GODE HRAO MAL2 REUN BJNM CHTI GODE HRAO MAL2
                5  |  GFZ   | REUN SYOG
                5  |  GRG   | BOGT BRUX CHTI CRO1 FAA1 GLSV KARR REUN SCUB TOW2
                5  |  GRG   | VILL BOGT CAS1 CHTI GLSV KOUR LHAZ MAS1 NICO SYOG
                5  |  JPL   | TUVA
                5  |  MIT   | HRAO HOLM HRAO
                6  |  COD   | 21 21 BJNM NKLG BJNM NKLG REUN
                6  |  EMR   | HERS
                6  |  ESA   | MAL2 MAL2 REUN
                6  |  GFZ   | BJNM CHTI FAA1 GODE MAL2 NKLG BJNM CHTI GODE MAL2
                6  |  GFZ   | NKLG
                6  |  GRG   | CHTI DAV1 GLSV LHAZ LPGS NRMD SSIA SYOG CHTI DAV1
                6  |  GRG   | GLSV LHAZ MAS1 NICO REUN
                6  |  JPL   | DAV1 TUVA
                6  |  MIT   | MAR6 NKLG MAR6 NKLG

 5. 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 AC clocks are
    corrected for the radial offsets of their satellite orbits compared to the
    combination.

 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, if available. 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
               ----+------------+----------
               G03 | 2017_01_10 | 2017002 

 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 G04 |  4 |  4 |  4 |  4 |    |  4 |  4 |

 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.
    
    Starting 07-Oct-2012 (GPS Week 1709, day 0, MJD 56207) all IGS products, are
    based on the updated IGS08 frame (IGb08). For more information see IGSMAIL
    #6663.

 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 RX, RY and RZ rotations
    were estimated in the IGS SINEX combination process, performed by the IGS
    Reference Frame Coordinator at the Institut Geographique National (IGN).
    Starting on 19-Aug-2012 (GPS Week 1702; MJD=56158), ACs began contributing
    products based on 1d SINEX integrations. As a result, the SINEX combinations
    are now done daily instead of weekly, and the associated daily rotations are
    applied here to the orbits and ERPs. 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 | Day |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+-----+---------------------------------------------------
       COD  |   0 |   -2.3   -1.1   -4.4       0     28     -5     .96
       EMR  |   0 |    1.2    3.3   17.5      44    -25     35    1.12
       ESA  |   0 |     .3    -.3     .5      68    -53     23     .59
       GFZ  |   0 |    1.0    -.3   -1.2     -30   -103    -55     .82
       GRG  |   0 |    8.3     .7   -1.8      36     65    -30     .45
       JPL  |   0 |    6.9    7.2   10.7     -14     -1    -48     .73
       MIT  |   0 |    6.0    4.0    7.2      38    -28    -31    1.10
       NGS  |   0 |     .5    4.9   11.9       6    -35     -4     .98
       SIO  |   0 |    2.2    2.1   -4.4     -16     15    -24    1.06

       COD  |   1 |   -1.8   -1.3   -2.6      -1     17      8     .78
       EMR  |   1 |    5.3    1.7   23.1      94     -8     19     .90
       ESA  |   1 |     .3    -.3   -1.4      14     -4     -7     .40
       GFZ  |   1 |     .3    -.0    -.6     -20   -104    -60     .69
       GRG  |   1 |    2.3    3.4    6.6      61     34     46     .32
       JPL  |   1 |   10.2   -3.4   13.2     -53     53     25     .36
       MIT  |   1 |    4.6    3.0    9.5      28    -22    -22     .86
       NGS  |   1 |     .2    -.9    1.0      16    -23    -16     .79
       SIO  |   1 |    4.5     .7   -2.6       9    -24    -11     .62

       COD  |   2 |   -1.7   -1.6   -2.5     -19      9      8     .83
       EMR  |   2 |    6.6    7.1   19.6      73     -2     32     .76
       ESA  |   2 |    -.8    -.0    -.7      24     -9     33     .59
       GFZ  |   2 |     .2    -.7    -.7     -14   -103    -18     .88
       GRG  |   2 |    2.5    5.4    6.6      42     50     18     .61
       JPL  |   2 |    1.7    2.0    8.1     -52     56     10     .83
       MIT  |   2 |    3.7    8.3    -.2      46    -18    -15    1.08
       NGS  |   2 |   -1.3    6.5    5.8      29    -26     -1     .99
       SIO  |   2 |    -.3    6.4   -7.6      18    -18      2     .92

       COD  |   3 |   -1.6    -.6   -1.7      19     43     30     .70
       EMR  |   3 |    1.1    8.5   12.7      86     35    -20     .79
       ESA  |   3 |    -.1    -.2   -1.3       8    -16     17     .32
       GFZ  |   3 |     .9    -.3   -1.6      -4    -92    -67     .76
       GRG  |   3 |    1.8    7.0    -.9      21     45     28     .29
       JPL  |   3 |   -3.9    8.1    5.2     -93     32     57     .38
       MIT  |   3 |    3.6    5.0    1.2      51      7    -40     .80
       NGS  |   3 |   -1.9    5.7   -6.4      98     -9    -37     .75
       SIO  |   3 |    2.1    8.6  -10.2      17     -8    -36     .45

       COD  |   4 |   -1.2    -.4   -2.7     -23     29      6     .77
       EMR  |   4 |    3.9    4.2   13.9     124     26      5     .77
       ESA  |   4 |    -.9     .5     .2      38    -21     50     .40
       GFZ  |   4 |     .2     .0    -.7      -7    -93    -25     .80
       GRG  |   4 |    2.7    7.1   14.4      32      5     -9     .40
       JPL  |   4 |   -3.1    -.3   10.0     -27      8     52     .79
       MIT  |   4 |    1.3    4.9    1.4      23     -2    -35    1.27
       NGS  |   4 |    3.3    3.8    4.8      32    -26     17    1.04
       SIO  |   4 |     .5    5.0   -2.3      29     -3    -13     .68

       COD  |   5 |   -1.3     .7   -2.4       6     32      9     .65
       EMR  |   5 |    4.7   -2.3   21.7     107      1     30     .53
       ESA  |   5 |    -.1     .2    -.4      28    -16     22     .44
       GFZ  |   5 |     .6    -.7    -.5     -17   -112    -22     .79
       GRG  |   5 |    8.2   -2.7   15.1      41     42      2     .41
       JPL  |   5 |    -.4   -1.1   19.6     -25    -24     29     .99
       MIT  |   5 |    1.8     .7    6.2      44      4    -42     .88
       NGS  |   5 |   -3.6   -1.4   -1.0       7      0    -52     .94
       SIO  |   5 |    2.9    -.4   -1.4     -14      8    -68     .88

       COD  |   6 |    -.9    -.4   -3.2      -2     38    -12     .74
       EMR  |   6 |    3.2     .4   16.4     113     10     57     .94
       ESA  |   6 |    -.7    -.1    -.4     101    -62     76     .26
       GFZ  |   6 |    -.0    -.7    -.6     -13   -108    -32    1.00
       GRG  |   6 |    1.8    2.4    9.5      61     14    -23     .42
       JPL  |   6 |   -7.9    4.7     .6     -50     72     37     .37
       MIT  |   6 |     .8    2.7    5.5      27    -25    -24     .98
       NGS  |   6 |    -.3   -1.2   -6.3      40    -17    -24     .99
       SIO  |   6 |   -2.6    3.7     .3       1    -38    -10     .82


10. As inidicated in the previous remarks, the IGS final orbits are aligned to the
    IGS reference frame by pre-aligning each AC orbit with the 3 corresponding
    SINEX rotations. This approach began 27-Feb-2000 (GPS Week 1051-0; MJD 51601).
    Starting sometime prior to 19-Aug-2012 (GPS Week 1702; MJD=56158), the orbit
    combination procedures used an incorrect sign convention to apply the SINEX
    RX and RY values to the AC orbits.
    
    Also starting 27-Feb-2000 (GPS  Week 1051-0; MJD 51601), the AC orbits were
    pre-aligned using rotations derived from differences between AC and IGS
    combined x and y polar motion. These ERP rotations were intended to
    approximate day-to-day variations of the AC orbital frames when only weekly
    averaged AC TRF rotations were available (For more details, see IGSMAIL
    #2750). With the change to daily SINEX integrations starting 19-Aug-2012, the
    ERP rotations are no longer needed/applied.

11. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) the absolute antenna model is introduced (IGSMAIL
    #5438). The antenna phase center offsets and phase center variations are given
    in the file:
        ftp://igs.org/igscb/station/general/igs05.atx
    These antenna calibrations are also used in the homogeneously reprocessed IGS
    products from GPS Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) the absolute antenna
    model is updated (IGSMAIL #6255 & #6374) as given in the file:
        ftp://igs.org/igscb/station/general/igs08.atx
    
    The JPL solution did not use IGS08/igs08.atx until GPS Week 1649, which caused
    their RMS clock residuals to be higher during that period than for the other
    centres; from GPS Week 1632 through 1648 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 seven 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 1.1931.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1931.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 2.1931.[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 3.1931.[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 part, 
Table 5, is similar to Table 4 and contains daily precise navigation
statistics (Tables 5.1931.0-6). The sixth part, Table 6, is a weekly
summary of daily ERP combination statistics. The seventh part, Table 7,
contains the daily ERP statistics. But this is not the IGS official ERP
combination products (which come from the accompanying SINEX combination)
but provided to check combination consistency, etc.

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 1931 summary.                       (Jan 08, 2017 - Jan 14, 2017)

Table 1.1931.a   GPS week: 1931   MJD: 57761.000-57767.000

         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  232|   -1     1    -1    18    -1    18   .06   10   10 |    -725    -393     15    132
        |    0     1     1    14    18    18   .03           |     227     280
emr   80|    0     0     5   -17   -32     1   .32   12   12 |    2558     -84     18    142
        |    1     1     1    29    10     9   .05           |    1169     960
esa  149|    0     0     0    21     9    10  -.49    7    7 |    -617    -300      8    157
        |    0     0     1    17    20    15   .02           |    1014    1671
gfz  193|   -1     0    -4    30     0     2   .18   12   12 |    -395     107     11    134
        |    0     1     1    15    14    11   .03           |     254     324
grg  113|    0     0     1    -8    44    11  -.31   13   12 |       8      31     25    199
        |    0     0     7    19    15    20   .02           |     140     396
igr  n/a|    0     0    -1   -22    24    -8   .01    5    4 |   16017    -276     16     82
        |    0     0     1    11    16     8   .06           |    1107     783
jpl   80|    0     0     6   -15    23   -42   .32   10   10 |    2302    -112     15    108
        |    0     0     1    33    34    21   .03           |     837     664
mit  349|    1     0    -4   -26   -29     5   .01   13   13 |     -64     -21     46    318
        |    0     0     1    43    43    13   .02           |     362     423
ngs  205|    0     0    -3   -25     1     7   .16   10    9 |    -752    -331    957   2105
        |    1     1     4    16    23    16   .03           |     212     300
sio  286|    0    -2    -3    -3   -37    -2   .02   14   14 |     ---     ---    ---    ---
        |    0     0     1    27    54    27   .03           |     ---     ---


Table 1.1931.b   GPS week : 1931   MJD: 57761.000-57767.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1931.0   GPS week: 1931   Day: 0   MJD: 57761.000                            

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  233|   -1     1     0    29    -8    27   .11   11   10 |   -1169     148     17    108
emr   80|    0     0     6   -19   -49     5   .35   10   10 |    2399     755     13    100
esa  147|    0     0     1    28   -17    24  -.50    7    7 |   -1157     872     11    168
gfz  192|    0    -2    -3    16     6     2   .14   12   11 |    -401     303     11     72
grg  106|    1     0   -12   -43    59    -1  -.27   14   13 |     -47    -105     30    171
igr  n/a|    0     0    -1   -27    27     4  -.00    4    4 |   15733     658     15     80
jpl   80|    1     1     7    31   -20   -69   .36   10   10 |    1837     645     14     88
mit  350|    1     0    -3   -18    14   -23  -.03   14   13 |    -130    -415     50    309
ngs  204|    0     0     1   -31     5    38   .09   10    8 |   -1168     178    700   1906
sio  280|    0    -2    -6   -46    52   -12   .02   15   14 |     ---     ---    ---    ---

Table 2.1931.1   GPS week: 1931   Day: 1   MJD: 57762.000                            

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  232|   -1     1     0    38    -5     5   .08   10   10 |    -807    -373     17    137
emr   80|    0     2     6     0   -33     2   .34   12   12 |    3985     275     16    108
esa  150|    0     0     1    -2    39   -17  -.49    7    7 |     569   -2177     10    149
gfz  192|    0     0    -3    45    20    -3   .21   11   11 |     126    -434     12    147
grg  108|    0     0     0     2    44    18  -.30   13   13 |    -102     375     26    183
igr  n/a|    0     0    -1   -24    57    -3   .01    4    4 |   17211     508     16     68
jpl   80|    1     0     5   -50    37   -26   .30   10   10 |    3303     193     15    110
mit  350|    1     0    -4     9   -93     9  -.01   13   12 |    -174     436     44    314
ngs  206|   -1    -1    -7   -40     4    17   .14   10    9 |    -724    -614   1026   1916
sio  285|   -1     0    -4    13  -100    36   .03   14   14 |     ---     ---    ---    ---

Table 2.1931.2   GPS week: 1931   Day: 2   MJD: 57763.000                            

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  235|   -1     0     0     5    13    10   .04   11   11 |    -721    -300     16    140
emr   80|    0     1     3   -29   -35    13   .32   12   12 |    3827    -152     21    146
esa  150|    0     0     0    32    23     5  -.45    7    7 |   -1902    1850      8    161
gfz  197|   -1    -1    -4    37   -20     2   .24   12   12 |    -498     237     10    163
grg  108|    1     0     2     1    37    10  -.33   13   12 |     -18     266     26    207
igr  n/a|    0    -1     0   -15    30   -21   .04    4    4 |   17321    -311     17     80
jpl   80|    0     0     5    11    58   -51   .34   10   10 |    3160      25     16    106
mit  350|    1     0    -7   -47   -29    17   .01   13   12 |    -401     419     56    350
ngs  211|    0     0     0   -38   -36     0   .16   11    9 |    -707    -306   1059   2265
sio  292|   -1    -2    -3   -19   -38    27  -.02   16   15 |     ---     ---    ---    ---

Table 2.1931.3   GPS week: 1931   Day: 3   MJD: 57764.000                            

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  233|   -1     1     1     6    10     5   .06   10   10 |    -463    -723     15    117
emr   80|   -1     0     5   -72   -19   -13   .23   11   11 |    3306    -508     22    167
esa  150|    1    -1     0    31    17    10  -.48    8    8 |     385   -2005     10    140
gfz  194|   -1    -1    -4    41     0   -10   .18   12   12 |    -503     -24     13     83
grg  117|    1     0     0   -10    55    19  -.31   12   10 |     -52     191     25    202
igr  n/a|    0    -1    -1   -11    20   -15   .11    6    5 |   16624    -174     20     81
jpl   80|    0     1     5   -61    57    -4   .29   10   10 |    2930    -198     14     97
mit  350|    2    -1    -4    14   -63    16   .01   13   13 |    -187      27     43    323
ngs  204|    0     0    -4     1   -18     2   .15   10    8 |    -464    -710    937   2043
sio  291|    0    -3    -2    35   -91   -39   .06   16   15 |     ---     ---    ---    ---

Table 2.1931.4   GPS week: 1931   Day: 4   MJD: 57765.000                            

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  234|   -2     0    -3     9   -32    18   .02   10   10 |    -710    -508     16    157
emr   80|    0     0     5     3   -21     1   .32   12   12 |    1954   -1966     21    172
esa  150|    0     0    -1    40   -16    19  -.50    8    8 |   -1570     195      9    155
gfz  192|   -1     0    -6     1   -17    25   .18   12   12 |    -689      -6     15    247
grg  120|    0     1    10   -21    20   -22  -.33   13   11 |     311    -795     22    200
igr  n/a|    0     0    -3   -40    12    -5  -.01    5    4 |   15717   -1606     19     95
jpl   80|    0     0     4     3     2   -36   .33   10   10 |    2083   -1409     16    118
mit  350|    0     0    -5   -68    31     2   .03   13   12 |     228    -682     45    337
ngs  203|    0    -2     0    -9    35   -13   .16   10    9 |    -766    -373    770   2271
sio  289|    0    -2    -4   -14     0     5   .03   14   14 |     ---     ---    ---    ---

Table 2.1931.5   GPS week: 1931   Day: 5   MJD: 57766.000                            

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  233|    0     2    -2     6    23    54   .05   10   11 |    -663    -384     16    144
emr   80|    0     0     8   -18   -41    -4   .32   12   12 |    1306     125     20    155
esa  150|    0     0     0    23    15     4  -.51    8    8 |     284   -1842      7    183
gfz  194|   -1     0    -5    32     9    -6   .14   11   11 |    -341      68     10    120
grg  116|    1     2     7    -3    61    44  -.32   13   12 |      37      54     25    208
igr  n/a|    0     0    -1   -29     8   -13  -.06    5    5 |   15269    -900     16     87
jpl   80|    1    -1     7   -33   -16   -53   .28   11   11 |    1711    -377     16    129
mit  350|    1     0    -3    18   -18     3   .03   13   13 |    -395     226     41    311
ngs  208|   -2    -1    -6   -20    15     4   .18   10    8 |    -653    -391   1298   2195
sio  286|    0    -1    -2   -13   -65   -22   .03   14   13 |     ---     ---    ---    ---

Table 2.1931.6   GPS week: 1931   Day: 6   MJD: 57767.000                            

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  230|   -1     1    -2    33   -10     2   .05   10   11 |    -543    -614     14    127
emr   80|    1    -1     6    17   -24     7   .38   16   14 |    1129     882     18    146
esa  150|    1     0     0    -3     5    26  -.49    7    7 |    -931    1006      7    145
gfz  195|   -1     0    -2    37    -5     2   .17   12   12 |    -460     608     12    108
grg  117|    1     0     3    15    33    11  -.30   14   11 |     -73     234     24    224
igr  n/a|    0     0    -1    -7    14    -6  -.04    4    4 |   14246    -110     15     85
jpl   80|    0     0     6   -11    46   -55   .35   10   10 |    1092     337     15    114
mit  349|    1     0    -3   -89   -45    12   .02   14   13 |     605    -160     49    285
ngs  200|   -2    -1    -8   -38     0     7   .20   11    9 |    -787    -102    912   2141
sio  283|    0    -1    -2    20   -17   -16  -.01   13   13 |     ---     ---    ---    ---

       
       
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 3.1931.0   GPS week: 1931   Day: 0   MJD: 57761.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   12   11    6    7   16    4    8   11    8   13    3 |    19   24   16   15   22   17   23   19   19   20    17
   2E |   10   13    5   10   17    3   14   14   11   12    4 |    23   24   18   20   29   17   23   20   18   23    19
   3  |    7    8    5    8   11    4    7   10    6   12    2 |    12   11    7    9    9    7   10   11    7   10     9
  X4  |    3  ---  ---  ---  ---   50  ---  ---  ---  ---    0 |   232  ---  ---  ---  ---  213  ---  ---  ---  ---   233
   5  |    6    9   10   15    7    5   12   16   12   21    4 |    41   47   38   36   39   37   48   34   37   41    38
   6E |   11    8    6    9   15    5    8   11    7   13    3 |    22   23   14   18   20   17   22   20   19   21    17
   7E |   20   15    4   12   17    7   16   12    9   12    4 |   111  106  103  107  101  103  100  105  106  101   103
   8  |   11   11    5    6   14    2   10   13   11   13    3 |    25   25   15   20   24   19   26   23   20   26    20
   9  |    8    9    4    7    9    3    9    8    9   10    2 |    47   50   42   45   43   44   49   45   48   40    45
  10  |    8    7    5    6    7    3    9    7    7    5    2 |    27   29   22   23   23   21   27   24   19   25    22
  11E |   12   10    6    6   16    4   10   13   11   15    3 |    22   21   20   19   28   19   23   21   22   23    19
  12  |   14   10    5   14   14    5   10   18   11   21    4 |    30   28   19   26   25   21   29   18   20   18    21
  13  |    5   11    9   15   13    5   13   13   13   12    4 |    40   44   39   44   38   39   40   38   38   36    38
  14  |    8    8    8   14    9    4    6   13    9   13    3 |    35   37   36   43   36   38   35   39   37   37    36
  15  |    6    9    8   13   11    4   12   17   13   16    4 |    45   47   44   47   43   43   46   44   42   45    43
  16  |   20   14    5   16   15    6   10   18   13   17    5 |    30   22   13   19   21   15   20   19   17   13    15
  17  |   10    9    6   19   20    4    8   17    9   13    4 |    23   28   18   33   24   21   28   18   21   19    21
  18  |   13    8    7   13    9    4    9   12   13   19    4 |    37   35   34   36   35   31   32   34   31   38    32
  19  |   12   10    7   18   22    5   11   20   10   17    4 |    21   23   13   24   26   16   24   17   15   17    16
  20  |    7    8    9   15    9    5   10   13   11   19    4 |    44   36   38   44   41   38   36   40   36   44    38
  21E |   11    9    5    9   14    4   10    8    9   11    3 |    21   21   15   20   22   16   21   15   17   22    17
  22  |    6    9   10   12   10    4    7   20   10   19    4 |    37   39   40   42   38   37   37   43   36   36    37
  23  |    6    8   10   12    8    3    8   12    9   19    3 |    32   31   31   33   29   30   31   32   32   25    30
  24  |    7   11    7    8   13    4   10   11    8   15    3 |    23   23   16   22   27   20   24   20   20   23    19
  25  |    9   14    5    7    9    7   11   11    6   11    3 |    20   25   13   19   19   15   26   15   16   17    17
  26  |   10   10    3    8   14    3    9    9    7   10    3 |    24   26   14   20   22   20   25   20   21   23    20
  27  |    9   13    7    7   10    2   10    8    8   13    3 |    25   32   20   24   24   23   30   24   24   27    23
  28  |   11   10    9   23   20    4    9   19   14   12    5 |    24   26   18   38   27   22   28   23   25   19    22
  29  |   13   11    7   15   18    7   10   18   11   21    4 |    27   24   15   24   26   18   24   19   18   18    18
  30E |   11   10    6    8   16    4    9   15    8    8    3 |    55   56   50   52   52   51   56   49   55   51    52
  31E |   14   10    3   10   17    4    7   10    9    9    3 |    84   82   81   84   85   83   83   83   82   85    83
  32  |    7    9    4    7    9    3    9    8    3   14    2 |    43   50   41   43   45   44   47   47   44   44    44
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   10    7   12   14    4   10   14   10   15      |T   40   35   29   33   33   36   34   31   31   31    37
 WRMS |   10   10    7   11   13    4   10   13    8   14      |NE  39   32   25   31   29   34   31   28   27   27    35
 MEDI |   10   10    6   10   14    4   10   13    9   13      |MD  27   28   20   26   27   21   28   23   22   25    22

Table 3.1931.1   GPS week: 1931   Day: 1   MJD: 57762.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   11   13    4    8   15    5    9    8    6   10    3 |    20   24   11   18   19   16   19   16   20   16    14
   2E |    9   16    5    8   14    5   15   17    9   17    4 |    20   27   17   19   20   16   22   22   18   21    17
   3  |    6    8    6    7   10    6    8    7    9   12    2 |    11   14    9   13   14   12   10   11   13    9    11
  X4  |    3  ---  ---  ---  ---   89  ---  ---  ---  ---    0 |   282  ---  ---  ---  ---  269  ---  ---  ---  ---   283
   5  |    7   13   11   12   10    4   11   20   12   23    4 |    31   37   29   30   25   28   35   25   29   33    27
   6E |    9   12    7    9   15    5    9   11    9   12    3 |    20   20   13   21   18   14   19   20   17   22    15
   7  |    8   15    4   14   20    7   13   15   11   15    4 |    58   54   51   57   52   54   57   54   60   54    54
   8  |   12   10    5    7   15    3   12   12   11   15    4 |    22   25   12   22   22   19   25   21   24   26    18
   9  |    9   10    5    6    7    3    8    9    9   10    2 |    29   37   27   30   26   29   37   33   33   28    29
  10  |    7    7    5    7    9    2    8   10    8    6    2 |    19   29   17   21   19   20   25   21   21   19    18
  11E |    6   10    9    7   10    3   10   11   13   13    3 |    21   22   15   23   19   19   23   23   23   26    19
  12  |   13   12    5   14   13    5    9   15   11   17    4 |    24   25   16   25   19   18   23   18   21   15    17
  13  |    9   13   11   13   13    3   13   13   15   15    4 |    26   36   28   32   24   26   33   26   31   27    27
  14  |    9    8    9   10    8    4    7   12    9   15    3 |    27   32   27   33   28   30   30   31   33   32    28
  15  |    8   13    8   12    9    3   11   18   12   17    4 |    24   30   24   28   25   24   28   26   23   27    23
  16  |   17   11   10   18   22    4   11   13   15   18    5 |    30   23   21   23   33   19   21   20   25   13    19
  17  |    8   14    7   14   17    4    9   17   11   11    4 |    20   31   17   27   21   20   28   14   24   19    19
  18  |   15   11    9   16   11    5    7   13   12   18    4 |    28   31   26   30   25   23   25   25   25   27    23
  19  |   10   15    8   15   20    5   10   21   11   13    4 |    19   28   15   22   24   16   25   13   18   15    15
  20  |    8   11    9   14   10    3    8   15   10   18    4 |    30   29   29   35   33   28   28   29   29   31    28
  21E |   10   10    6   12   14    3   12    8    8   11    3 |    20   24   16   22   26   18   22   18   19   22    18
  22  |    9    9   12   13   12    6    8   14   12   16    4 |    31   31   32   32   28   28   30   28   27   25    28
  23  |    8    8   10   12   11    4    6   12   10   19    3 |    24   25   26   27   23   23   25   26   27   17    22
  24  |    7   12    7    7    9    4   10   11    8   14    3 |    19   24   14   19   19   18   22   19   22   20    17
  25  |    9   16    6    6    8    5   12    9    6   11    3 |    17   24   14   21   15   16   24   16   18   18    15
  26  |   10   10    5   11   12    3    8    8   10   10    3 |    20   23   13   20   18   18   20   18   25   21    17
  27  |    9   12    5    8   13    3   10    7   10   13    3 |    30   34   26   32   31   29   33   27   33   29    28
  28  |    9   12    9   12   16    3    8   16    9   12    4 |    19   28   19   25   19   20   25   21   23   16    19
  29  |   15   15    7   16   15    5   10   14   11   19    4 |    26   24   18   26   21   19   23   19   20   18    18
  30E |   10   14    4    9   17    5   11   13    7    9    3 |    35   34   29   34   29   32   35   30   34   31    30
  31E |   11    8    4   10   15    5    8   10    8   13    3 |    81   77   74   78   76   78   77   79   79   79    77
  32  |    7   10    4   11    9    3   10    8    6   13    3 |    26   37   25   30   29   30   33   30   32   31    28
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   12    7   11   13    4   10   13   10   14      |T   34   30   22   28   25   32   28   25   27   25    31
 WRMS |   10   12    7   11   13    4   10   12    9   14      |NE  34   28   21   26   23   32   26   22   25   22    32
 MEDI |    9   12    7   11   13    4   10   12   10   13      |MD  24   28   19   26   24   20   25   22   24   22    19

Table 3.1931.2   GPS week: 1931   Day: 2   MJD: 57763.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   11   12    4    7   12    5   10    8    7   11    3 |    19   22   15   21   13   17   24   19   20   19    16
   2E |   14   13    6   11   14    3   12   15   10   19    4 |    22   23   17   24   18   19   24   19   20   29    18
  X3  |    1  ---  ---  ---  ---   32  ---  ---  ---  ---    0 |    83  ---  ---  ---  ---   70  ---  ---  ---  ---    86
  X4  |    1  ---  ---  ---  ---   42  ---  ---  ---  ---    0 |   165  ---  ---  ---  ---  166  ---  ---  ---  ---   165
   5  |    7   10   11   16   10    5   10   19   13   22    4 |    36   41   35   33   37   33   41   29   34   37    34
   6E |   11   11    6    7   19    5    8    9    8   18    3 |    19   21    8   17   20   14   18   18   18   22    13
   7  |   10   18    4   11   22    7   14   13   11   15    4 |    38   41   35   41   37   37   41   37   37   32    35
   8  |   10   10    5    7   12    4   12   13    8   15    3 |    23   26   15   23   21   21   26   23   22   27    20
   9  |    8    8    5    6    9    4   11    8    6   15    3 |    32   39   30   33   29   30   39   34   31   32    32
  10  |    8    8    5    6    9    2    7    8    6    7    2 |    22   26   19   22   18   19   23   23   19   23    19
  11E |   10   13    8    9   11    3    9    8   11    9    3 |    22   28   16   21   22   19   25   18   21   19    19
  12  |   12   13    5   15   13    4    9   17   13   15    4 |    24   25   15   26   20   18   25   18   22   19    18
  13  |    8   12    9   14   11    5   11   14   14   14    4 |    28   35   26   31   27   26   32   29   29   27    27
  14  |    8    6    8   12   12    4    7   14    9   18    3 |    30   32   31   34   29   29   29   35   30   32    29
  15  |    8   11    8   14    6    4   10   16   13   18    4 |    30   35   31   32   33   31   36   32   33   34    31
  16  |   18   13    6   15   15    6   10   12   11   19    4 |    30   23   16   22   24   16   20   20   19   16    17
  17  |    8   14    9   18   17    5   12   17   12   13    4 |    20   30   22   32   22   22   28   18   26   26    22
  18  |   14    8    9   15   10    5    9   13   14   21    4 |    30   32   28   34   26   25   28   31   29   31    27
  19  |    9   15    7   16   15    5   12   20   12   15    4 |    21   28   17   22   22   18   26   17   19   20    17
  20  |    9    8    9   17   10    5   11   16   14   20    4 |    31   31   30   37   30   28   29   34   24   33    28
  21E |   11   10    6   11    8    4   11    9   10   13    3 |    18   17   13   20   13   13   17   15   19   21    14
  22  |   10    9    8   14   11    5    9   13   13   18    4 |    30   33   31   31   26   27   31   33   26   29    28
  23  |    8    7   10   10    8    4    7   13    8   19    3 |    25   27   26   26   22   23   25   26   22   18    23
  24  |   11   13    6    8    8    3    9    9   12   13    3 |    22   25   20   27   21   21   23   24   25   25    21
  25  |    9   15    5    7    9    4    9   10    6   13    3 |    16   24    9   20   14   15   22   16   18   17    14
  26  |   10   12    4    9   14    4   10    9    7   10    3 |    24   26   17   21   20   19   24   22   24   25    20
  27  |    8   10    5    7   10    4   12    9    7   14    3 |    30   32   20   29   25   26   32   28   30   26    26
  28  |   12   14    7   13   16    4    8   17   15   12    4 |    27   29   20   29   26   24   26   23   31   21    23
  29  |   17   13    6   15   15    4   10   13   13   19    4 |    31   24   16   25   24   19   27   18   22   23    19
  30E |   10   12    5    7   18    5   10   15    9   11    4 |    56   56   52   56   46   53   55   51   59   51    52
  31  |   12   12    5   10   16    4    8   12   11   16    4 |    52   49   47   50   50   47   47   50   45   49    47
  32  |    6   10    5   13   12    4    9    9    7   14    3 |    36   42   33   36   35   35   39   40   36   38    35
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   12    7   12   13    4   10   13   11   16      |T   34   30   23   29   25   30   29   26   27   27    31
 WRMS |   11   12    7   12   12    4   10   12    9   15      |NE  35   30   23   28   25   31   28   26   25   26    32
 MEDI |   10   12    6   11   12    4   10   13   11   15      |MD  28   28   20   27   24   23   26   23   24   26    23

Table 3.1931.3   GPS week: 1931   Day: 3   MJD: 57764.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   12   13   11    8   13    4    8    8    7   12    3 |    20   32   23   22   20   25   27   23   28   23    21
   2E |    8   12    7    9   15    6   11   14   11   16    4 |    23   31   21   21   26   20   26   26   27   30    22
  X3  |   12    8    5   10    8    6   11    9  ---   13    3 |    19   19   11   17   11   18   22   11  ---   19    16
  X4  |    1  ---  ---  ---  ---   37  ---  ---  ---  ---    0 |   197  ---  ---  ---  ---  179  ---  ---  ---  ---   199
   5  |    7   13   10   14    8    6   11   24   12   22    4 |    35   46   37   34   34   36   42   32   34   38    34
   6E |    8    8    6    9   16    6    8   12    8   13    3 |    19   26   12   20   22   18   21   23   24   22    17
   7  |    9   16    5   12   20    7   14   12   11   17    4 |    40   42   35   43   43   39   39   37   43   32    37
   8  |   15   12    6    8   12    4   13   16   10   19    4 |    28   32   21   27   24   26   29   26   29   31    23
   9  |    8    8    6    6    7    3    9    4    6   11    2 |    38   46   39   42   36   39   44   42   44   42    40
  10  |    7   11    7    9    7    4    9    8    8    9    3 |    24   32   17   23   22   22   27   24   25   25    21
  11E |   13   11    8   10   10    6   11    8    6   13    3 |    28   33   23   27   22   26   26   22   27   22    23
  12  |   10   10    8   14   15    7    9   15   10   18    4 |    27   30   20   23   23   21   26   23   25   21    21
  13  |    8   13   10   14   10    6   12   17   12   14    4 |    37   43   35   40   35   36   38   37   40   35    36
  14  |    9    8    9   12    5    5    8   13    9   13    3 |    30   36   32   41   31   35   33   40   38   34    32
  15  |    6   13    8   14    6    7   12   17   12   15    4 |    40   46   39   40   39   39   42   40   38   41    39
  16  |   18   10    7   14   12    6   11   12   13   21    4 |    33   28   23   29   25   24   27   23   28   20    23
  17  |   10    9    6   15   14    7    8   18   13   14    4 |    25   31   22   31   23   25   30   22   28   28    23
  18  |   11   11   11   16    9    8   10   14   11   20    4 |    30   33   28   33   30   29   30   30   29   33    27
  19  |   12   10    6   16   14    8   10   21   13   14    4 |    23   30   21   26   25   21   29   21   26   24    21
  20  |    6   11   10   17   10    6   11   18   11   18    4 |    33   32   33   39   35   34   30   36   34   38    32
  21E |   11   13    6   13   12    6   11   11    6   11    3 |    25   27   16   22   24   19   19   21   21   25    19
  22  |   11   10   12   15   10    7    8   10   11   21    4 |    34   40   35   40   30   35   35   35   39   33    33
  23  |    9    7   10   10    6    6   10   11   10   17    3 |    28   30   32   32   29   29   30   32   35   24    29
  24  |    8   12   11    8   10    5    9   11    5   14    3 |    29   36   27   28   27   28   31   29   29   32    27
  25  |    9   13    5    7    7    4   10   12    7   13    3 |    24   30   16   22   16   21   25   21   27   30    20
  26  |    9   12    7    7   10    2    9    9    9   11    3 |    25   30   17   25   21   23   25   24   28   24    21
  27  |    7   12    9    9    9    5   12   10    8   15    3 |    38   45   33   39   36   39   42   40   43   39    37
  28  |   10   11    7   16   14    7    8   13   11   11    4 |    22   29   22   33   21   22   25   24   27   21    22
  29  |   15   13    7   16   11    7   11   17    9   23    4 |    33   31   23   29   26   25   28   26   30   31    25
  30  |    8   10    6    7   19    6    9   10    8   11    3 |    64   62   61   64   63   61   63   58   62   59    61
  31  |   12   10    9   11   14    4    9   13    9   17    4 |    36   39   35   40   36   37   36   39   36   38    34
  32  |    8   11    6   10    6    5   10    7    6   10    3 |    41   48   39   45   41   43   45   48   47   43    42
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   11    8   12   12    6   10   13   10   16      |T   35   35   27   32   28   34   32   30   33   30    33
 WRMS |   10   11    8   12   10    5   10   13    8   15      |NE  37   34   27   32   27   35   31   29   32   30    35
 MEDI |    9   11    7   11   10    6   10   12    9   14      |MD  29   32   23   31   26   26   30   26   29   31    25

Table 3.1931.4   GPS week: 1931   Day: 4   MJD: 57765.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   10   12    9    8   19    5   10   12    8   17    4 |    27   30   17   20   25   21   28   23   21   26    20
   2E |   13   13    7   11   13    5   13   14   10   17    4 |    30   29   25   26   27   23   27   22   26   24    24
   3  |   10   10    4    9   10    4    8    7    6   12    3 |    19   23   15   16   17   18   20   15   13   17    19
  X4  |    3  ---  ---  ---  ---   51  ---  ---  ---  ---    0 |    73  ---  ---  ---  ---   74  ---  ---  ---  ---    74
   5  |    5   12   11   14   12    6   13   21   14   21    5 |    39   44   36   29   40   32   43   34   36   39    36
   6E |    9    8    6    8   14    5    6   11    8   12    3 |    28   26   18   22   20   21   25   20   24   24    21
   7  |    8   16    4   14   18    5   13   11    7   14    4 |    36   35   29   37   29   32   35   33   29   27    30
   8  |   12   16    6    9   11    5   13    8   10   12    4 |    27   31   19   23   22   22   29   22   22   26    21
   9  |    9    9    6   13    9    4    9    5    7   12    3 |    42   46   38   43   30   41   45   41   36   42    39
  10  |    9    8    6    7    4    3   10   10    7    8    2 |    27   34   21   22   22   22   27   26   22   27    23
  11E |    9   15    9    6   15    7   11    8   15   13    4 |    27   26   19   24   25   20   27   18   21   23    21
  12  |   12   12    6   12    9    3   11   13   12   12    4 |    31   31   18   22   23   23   30   23   24   23    23
  13  |    8   11    9   14   10    5   10   17   11   13    4 |    37   37   34   34   27   33   36   34   28   31    32
  14  |    9    8    9   12    9    3    8   14   10   14    3 |    35   34   32   40   25   33   32   37   30   33    31
  15  |    6   13    8   12    9    4   10   16   11   17    4 |    39   39   35   34   33   34   36   36   30   34    33
  16  |   18   11    7   16   14    6   12   12   13   18    4 |    30   25   16   21   21   17   21   19   16   16    17
  17  |    8   13    7   18   14    5   11   15   12   12    4 |    28   34   23   33   26   25   33   20   28   24    25
  18  |   10   10    9   15    9    4   12   16   14   21    4 |    32   31   26   28   23   25   29   29   19   30    25
  19  |    8   14    9   16   14    4   12   21   13   13    4 |    27   30   20   24   26   22   32   18   23   19    22
  20  |    8    9   11   13    8    6    8   16   10   18    4 |    32   29   30   31   25   27   28   34   26   33    28
  21E |    9    9    7   11   17    5   11   12   11   12    4 |    26   28   21   23   29   21   27   19   18   28    22
  22  |    9   12    9   13   12    5    8   10   12   17    4 |    35   38   34   33   27   32   33   33   26   29    30
  23  |   10    6   11   13    8    5    7   12   10   16    3 |    28   30   29   29   19   28   28   29   20   22    25
  24  |    8   12    7    8   12    3    9    8   10   11    3 |    37   41   32   37   36   35   38   34   35   36    35
  25  |   11   18    6    8   12    4   11   10    7   14    3 |    25   33   18   24   25   21   32   23   22   27    23
  26  |   11   11    7    9   11    4    8   11    9   10    3 |    23   30   18   22   18   19   26   23   20   23    20
  27  |   10   12    6   10   11    5   11    9    9   13    3 |    35   40   31   36   30   33   36   33   29   35    32
  28  |    8   14    9   15   13    5    8   11   11   10    4 |    27   30   19   30   24   20   28   25   24   21    23
  29  |   17   14    7   15    9    3   10   17   11   17    4 |    33   33   25   27   24   25   28   26   25   27    25
  30  |   10   10    9    7   29    4   12    8    7    9    4 |    42   38   33   40   43   38   42   36   38   37    37
  31  |   15   14    5   10   13    4    7   14    9   12    4 |    38   39   34   40   32   34   34   38   32   36    34
  32  |    8    8    5    9    9    3    9   10    6   12    3 |    39   44   36   41   34   39   43   40   36   38    38
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   12    8   12   13    5   10   13   10   14      |T   32   33   25   29   26   28   31   27   25   28    28
 WRMS |   10   12    8   12   11    4   10   12    9   14      |NE  33   34   26   29   25   29   31   28   25   28    29
 MEDI |    9   12    7   12   12    5   10   12   10   13      |MD  31   33   25   29   25   25   30   26   25   27    25

Table 3.1931.5   GPS week: 1931   Day: 5   MJD: 57766.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8   15    6    9   17    4   10   13   10    9    3 |    20   30   16   22   21   20   24   22   21   22    19
   2E |    7   11    5   12   14    7   20   14   11   19    4 |    21   29   21   26   25   22   28   24   22   35    23
   3  |    9    9    5    6   12    3   10    9    8   12    3 |    17   19   11   13   11   14   15   13   14   15    14
  X4  |    4  ---  ---  ---  ---   64  ---  ---  ---  ---    0 |   184  ---  ---  ---  ---  176  ---  ---  ---  ---   185
   5  |    8   13   10   17   13    5   12   21   12   18    5 |    30   41   29   28   32   28   37   31   27   36    30
   6E |   12    9    8    8   16    7    8   10   10   10    3 |    22   27   14   22   27   18   21   20   20   21    19
   7  |   17   17    6   10   15    5   17    9   10   14    4 |    41   37   33   40   34   34   35   35   37   30    33
   8  |   10   13    7    6   13    4   11   11    8    9    3 |    22   30   17   25   20   21   24   21   21   22    20
   9  |   11   11    7    9    9    4   10    6    7   14    3 |    34   41   29   30   25   31   38   34   31   35    31
  10  |    7   11    5    8    7    4    6    9    4    7    2 |    22   33   14   22   18   20   26   22   22   21    20
  11E |    9   12   12    8   22    5    9    9    8   11    4 |    20   28   13   22   28   17   22   15   19   16    17
  12  |   10   10    6   13   12    3   11   14   10   14    4 |    24   30   17   23   22   19   26   21   21   21    20
  13  |   10   14   12   15   11    5   13   17   11   13    4 |    29   34   28   33   23   28   31   27   28   28    27
  14  |    9   10    8   15   11    3    8   12    9   13    3 |    27   31   27   41   27   30   30   34   34   29    29
  15  |    8   13    8   15   10    2   10   13    9   15    4 |    30   36   29   29   28   28   32   29   28   31    28
  16  |   18   13    9   13   13    6   10   13   12   19    4 |    32   30   23   26   25   23   27   21   26   16    22
  17  |    8   13    9   13   11    5   11   15   11    9    4 |    22   32   23   31   23   22   29   18   26   25    23
  18  |   15   11    9   17   11    5   12   15   12   22    5 |    25   28   20   27   20   19   26   23   19   23    19
  19  |    8   16    9   15   11    5   13   20   11   12    4 |    21   30   21   27   23   20   29   17   22   20    20
  20  |    9   11    9   17   11    5   11   18   10   17    4 |    23   24   23   29   20   20   22   25   18   25    20
  21E |    5   11    6   10   18    4   17    9    8   12    3 |    22   26   20   23   29   19   25   22   24   25    21
  22  |    8   11   10   11   12    5    9   10   12   17    4 |    26   31   25   27   22   26   26   27   24   23    24
  23  |   10    8   10    9   10    5   10   11    9   16    3 |    24   25   23   22   19   22   23   26   22   20    21
  24  |    8   13    7    7   11    5   11    7    9   13    3 |    31   36   26   32   31   29   31   31   32   35    30
  25  |   10   14    3    8    9    3   10   15    6   11    3 |    25   30   17   26   20   21   27   21   22   28    21
  26  |    8   12    4    8   11    5   10   11    7    8    3 |    25   31   21   27   23   25   27   26   28   25    24
  27  |    9   12    6    9   12    4   11   12    9   10    3 |    46   51   47   51   47   48   49   45   47   43    47
  28  |    6   10   10   13   12    4   12   13   15   11    4 |    23   33   24   29   21   23   28   26   22   18    23
  29  |   18   15    7   13   11    6   10   18   10   19    4 |    33   28   21   24   20   23   26   24   25   28    23
  30  |   10   11    7    6   24    4   11   10    9    9    4 |    38   38   31   39   41   35   36   35   39   35    35
  31  |   15   12    5    8   12    6    9   18    8   12    4 |    37   36   30   40   36   34   36   38   35   37    33
  32  |    9   11    8    7    9    6    9   11    6   10    3 |    29   38   26   32   27   30   36   33   34   27    30
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   12    8   11   13    5   11   13   10   14      |T   32   32   23   28   25   29   28   26   26   26    29
 WRMS |   11   12    8   11   12    5   11   13    8   13      |NE  33   32   23   28   23   31   28   25   25   25    31
 MEDI |    9   12    7   10   12    5   10   12    9   12      |MD  25   31   23   27   23   23   27   25   24   25    23

Table 3.1931.6   GPS week: 1931   Day: 6   MJD: 57767.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8   13    6    7   17    5    8   10    8    8    3 |    18   24   15   20   21   17   21   20   21   21    17
   2E |   11   13    6   10   21    5   10   13   11   12    4 |    20   23   17   23   23   17   24   20   23   23    18
   3  |    6   12    5    6    6    6    7   13    7    9    2 |    14   19   15   14   12   14   17   11   12   15    14
  X4  |    3  ---  ---  ---  ---   30  ---  ---  ---  ---    0 |   166  ---  ---  ---  ---  153  ---  ---  ---  ---   166
   5  |   12   11   10   14   13    3   12   23   16   17    5 |    43   48   38   36   43   39   48   36   39   41    39
   6E |   11   12    6    9   13    3    7   10    8    7    3 |    21   27   13   22   18   17   23   19   21   21    17
   7  |   10   22    6    9   12    4   10    9   11   12    4 |    46   37   37   42   32   39   41   36   41   38    38
   8  |    7   13    5    7   13    8    9   12   12   11    3 |    24   25   16   24   18   20   25   22   22   26    20
   9  |    8    8    5    9    8    4    7    9    8   14    3 |    48   50   46   47   42   47   51   47   46   51    46
  10  |    7   12    5    6    8    3    8   10    7    6    2 |    24   27   18   25   17   19   26   22   20   20    20
  11E |    8   10    8    7   14    6    8    9    9   10    3 |    24   25   17   23   23   17   22   17   20   17    18
  12  |   12   12    6   15   14    3   12   14   14   13    4 |    26   26   15   26   19   18   23   20   20   15    18
  13  |   10   15   10   19   10    4   13   19   12   13    4 |    45   43   42   49   37   42   41   42   44   39    41
  14  |    5   11    8   12   10    3    8   12   11   11    3 |    32   32   32   43   28   34   32   40   36   36    33
  15  |   10   15    8   13   11    2   12   15   14   17    4 |    44   44   43   48   41   42   43   44   43   46    42
  16  |   18   12    6   14   13    5   10   14   10   19    4 |    31   25   21   25   19   19   22   19   23   15    19
  17  |    9   14    7   17   18    4    9   16   12   12    4 |    24   32   22   34   24   23   28   18   27   23    23
  18  |   13   13    9   16    9    4   10   16   14   21    4 |    32   27   27   37   24   27   28   31   25   29    26
  19  |   10   11    7   16   14    3   10   21   13   14    4 |    23   28   20   26   23   18   27   16   22   18    19
  20  |    5   13    9   15   10    3   10   18   14   15    4 |    35   28   34   44   33   33   29   38   35   38    33
  21E |   12   46    8   13   27    6   16   18   11   14    6 |    21   49   16   24   31   16   18   19   17   27    17
  22  |    8   11   10   14   11    6    8   13   12   18    4 |    35   37   36   42   31   36   34   38   34   34    33
  23  |    9    6    9    8   10    5    7   14    9   15    3 |    30   28   30   31   26   30   28   33   30   27    28
  24  |   10   12    7    7   17    4   11   13    9    9    3 |    87   90   91   90   80   88   86   86   95   88    87
  25  |   10   12    4    6    9    3   10   10    7    9    3 |    20   25   15   24   18   16   25   17   18   18    17
  26  |   10   12    3    7   11    2    8   10    7   10    3 |    23   30   17   23   19   18   26   23   24   21    20
  27  |    8   14    4    5   11    5    9   14    7   12    3 |    51   55   44   51   45   47   55   52   50   52    50
  28  |   10   25    9   18   14    5   11   13   12    8    4 |    23   32   22   35   21   21   28   25   23   20    22
  29  |   16   13    5   12   14    5   11   17   12   18    4 |    29   26   18   26   26   21   26   22   22   21    20
  30  |   11   17    7    9   21    3   10   10    9    6    4 |    56   49   49   55   52   51   52   46   52   49    50
  31  |   15   13    5   10   14    4    7   16   10   13    4 |    36   36   33   43   34   35   35   39   40   37    34
  32  |   11   11    5   13    9    4   10   10   10    8    3 |    44   49   43   51   42   46   50   50   48   47    45
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   16    7   12   14    4   10   14   11   13      |T   37   35   29   35   29   33   33   31   32   31    34
 WRMS |   11   14    7   12   11    4   10   13    9   13      |NE  39   35   30   37   29   36   34   32   32   32    36
 MEDI |   10   12    6   10   13    4   10   13   11   12      |MD  30   30   22   34   26   23   28   25   25   27    23



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 4.1931   GPS week: 1931   MJD: 57761.0-57767.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2962 |U    8     8    15 |U   10    12    29 |U    6     5    11 |
emr | emr 2962 |     9    11    18 |U   12    12    27 |     8     6    17 |
esa | esa 2962 |     8    10    17 |U   10    12    30 |     7     6    17 |
gfz | gfz 2962 |U    8     8    16 |U   10    12    28 |U    6     5    15 |
grg | grg 2961 |U    9    10    18 |U   10    11    30 |     7     7    18 |
igr | igr 2962 |     8     8    16 |    10    14    26 |     6     5    13 |
igs | igs 2962 |     8     9    16 |    10    12    27 |     6     5    14 |
jpl | jpl 2962 |     9    12    19 |U   11    12    29 |     8     6    17 |
mit | mit 2962 |     9     9    19 |U   11    13    34 |U    8     8    21 |



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 5.1931.0   GPS week: 1931   Day: 0   MJD: 57761.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     4     4    10 |     5     7    22 |     6     5     9 |
emr | emr 2976 |     6     7    14 |     7     6    19 |     9     7    19 |
esa | esa 2976 |     5     6    15 |     6     9    25 |     8     7    18 |
gfz | gfz 2976 |     4     4    13 |     6     7    21 |     7     7    17 |
grg | grg 2976 |     6     7    19 |     7     8    26 |     8     9    20 |
igr | igr 2976 |     4     4    12 |     5     7    20 |     7     5    14 |
igs | igs 2976 |     4     5    13 |     6     7    21 |     7     6    16 |
jpl | jpl 2976 |     6    10    16 |     6     7    22 |     9     6    19 |
mit | mit 2976 |     4     4    17 |     8     8    23 |     8     6    21 |

Table 5.1931.1   GPS week: 1931   Day: 1   MJD: 57762.0

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

Table 5.1931.2   GPS week: 1931   Day: 2   MJD: 57763.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2880 |     3     6     9 |     9    12    31 |     6     5    11 |
emr | emr 2880 |     5    10    13 |     8    12    33 |     8     6    16 |
esa | esa 2880 |     4     8    12 |     9    10    34 |     7     6    15 |
gfz | gfz 2880 |     4     7    10 |     9    10    31 |     6     5    14 |
grg | grg 2880 |     6    10    15 |     8     8    32 |     7     8    19 |
igr | igr 2880 |     4     6    10 |    10    19    26 |     6     6    13 |
igs | igs 2880 |     4     8    11 |     9    10    30 |     6     5    13 |
jpl | jpl 2880 |     5    10    14 |    11    11    33 |     8     6    18 |
mit | mit 2880 |    10     8    17 |     9     8    32 |    11     7    25 |

Table 5.1931.3   GPS week: 1931   Day: 3   MJD: 57764.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     4    18 |  ----  ----  ---- |     5     5    11 |
emr | emr 2976 |     6     8    19 |  ----  ----  ---- |     7     5    17 |
esa | esa 2976 |     6     7    19 |  ----  ----  ---- |     7     5    17 |
gfz | gfz 2976 |     6     4    17 |  ----  ----  ---- |     5     5    14 |
grg | grg 2976 |     7     6    20 |  ----  ----  ---- |     6     6    16 |
igr | igr 2976 |     6     4    17 |  ----  ----  ---- |     5     4    13 |
igs | igs 2976 |     6     5    18 |  ----  ----  ---- |     5     4    14 |
jpl | jpl 2976 |     7     9    19 |  ----  ----  ---- |     7     4    16 |
mit | mit 2976 |     6     5    19 |  ----  ----  ---- |     5     5    15 |

Table 5.1931.4   GPS week: 1931   Day: 4   MJD: 57765.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     3    14 |  ----  ----  ---- |     5     4    10 |
emr | emr 2976 |     8     7    15 |  ----  ----  ---- |     7     5    18 |
esa | esa 2976 |     6     6    15 |  ----  ----  ---- |     6     5    17 |
gfz | gfz 2975 |     6     4    13 |  ----  ----  ---- |     5     4    14 |
grg | grg 2973 |     7     6    15 |  ----  ----  ---- |     7     5    19 |
igr | igr 2976 |     5     4    13 |  ----  ----  ---- |     5     5    13 |
igs | igs 2976 |     6     5    14 |  ----  ----  ---- |     5     4    14 |
jpl | jpl 2976 |     6     7    18 |  ----  ----  ---- |     6     4    14 |
mit | mit 2976 |     6     5    16 |  ----  ----  ---- |     6     5    15 |

Table 5.1931.5   GPS week: 1931   Day: 5   MJD: 57766.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    25    27    30 |     5     8    23 |     6     4     9 |
emr | emr 2976 |    25    28    32 |     7     8    26 |     8     5    16 |
esa | esa 2976 |    26    28    27 |     6     8    26 |     7     6    17 |
gfz | gfz 2976 |    25    27    29 |     6     8    26 |     6     5    14 |
grg | grg 2976 |    25    29    31 |     6     7    25 |     6     5    14 |
igr | igr 2976 |    26    27    30 |     6     8    23 |     6     5    12 |
igs | igs 2976 |    25    28    27 |     6     8    25 |     6     5    13 |
jpl | jpl 2976 |    27    32    30 |     6    10    29 |     8     8    19 |
mit | mit 2976 |    25    27    30 |     8    12    34 |     9     8    19 |

Table 5.1931.6   GPS week: 1931   Day: 6   MJD: 57767.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     8     8    13 |    24    25    53 |     6     5    23 |
emr | emr 2976 |     9    11    17 |    29    27    42 |     7     5    19 |
esa | esa 2976 |     8     9    17 |    25    27    44 |     7     6    21 |
gfz | gfz 2976 |     8     8    15 |    25    25    46 |     6     5    18 |
grg | grg 2976 |     9    11    16 |    25    24    44 |     8     5    22 |
igr | igr 2975 |     9     9    20 |    24    26    44 |     5     4    18 |
igs | igs 2976 |     8     9    15 |    26    26    45 |     6     4    18 |
jpl | jpl 2976 |     8    10    19 |    25    26    44 |     7     5    18 |
mit | mit 2976 |    11    11    21 |    25    26    59 |    12    18    41 |


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 6.1931   GPS week: 1931   MJD: 57761.500-57767.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       3      -5      64      71     -5 |      -8     34
            |      19      19      91      71      5 |       5
emr   uuuuu |      21      21    -129     112      9 |      22     45
            |      13      25      54      90      9 |       6
esa   uuuuu |     -17     -26      52     -52     -2 |       1     34
            |      15      17      43      54      4 |       4
gfz   uuuuu |     -32     -52      50    -231      1 |       1     34
            |      12      29     130     142      3 |       5
grg   uuuuu |     -10       2     -41     101     -1 |      -8     31
            |      19      23      46      36      5 |       4
igr   xxxxx |     -30      28     -32      35     13 |     -18     39
            |      17      14      65      36      5 |       6
irf   xxxxx |      30      -5     -14      -7      8 |      -9     35
            |      11      11      22      32      6 |       6
jpl   uuuuu |     -19       0      38      35      4 |      13     38
            |      38      26      88      70      8 |       5
mit   uuuuu |      37       7       5      14     -1 |       8     32
            |      27      16      45      81      3 |       5
ngs   uuuuu |      10      35     -93      21     -1 |      -1     34
            |      35      41     175     164      4 |       5
sio   uuxux |      34      51    -359     -47      1 |      40     54
            |      28      16      64      51      7 |       5


Table 7.1931.0   GPS week: 1931   Day: 0   MJD: 57761.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -3     -18     181     123      1 |      -2     50
emr   uuuuu |      46      35    -168     164      2 |      28     67
esa   uuuuu |       2     -45      82     -52      2 |       5     52
gfz   uuuuu |     -20     -45     162     -74     -4 |       8     54
grg   uuuuu |     -42      36     -54      85      4 |      -3     49
igr   xxxxx |     -46      41      55     -11     15 |     -17     55
irf   xxxxx |      38       5     -43       6      6 |      -9     51
jpl   uuuuu |       6     -46      44     -44      6 |      19     57
mit   uuuuu |      55       4     -69      45     -5 |      15     50
ngs   uuuuu |     -38      68    -230    -107     -4 |       7     54
sio   uuxux |     -17      79    -469     -96      7 |      43     66

Table 7.1931.1   GPS week: 1931   Day: 1   MJD: 57762.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       6     -34      84      91     -1 |     -12     42
emr   uuuuu |      20      13    -140     129      6 |      17     50
esa   uuuuu |     -38     -11     121     -31      1 |      -4     42
gfz   uuuuu |     -18     -83     155     -23      3 |      -3     40
grg   uuuuu |       2     -25     -53     122      1 |     -13     40
igr   xxxxx |     -56      39     -73      23     13 |     -26     48
irf   xxxxx |      28     -18       0      28     17 |     -17     44
jpl   uuuuu |     -21      25      68     -40     -5 |      10     45
mit   uuuuu |      57       5      25      57     -2 |       5     38
ngs   uuuuu |       3      71    -349    -140     -2 |      -4     42
sio   uuxux |      39      51    -366    -100      8 |      35     55

Table 7.1931.2   GPS week: 1931   Day: 2   MJD: 57763.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -4       8     135     180    -10 |      -4     34
emr   uuuuu |      20      43    -184     250      2 |      26     48
esa   uuuuu |     -36     -38      49    -152      0 |       4     36
gfz   uuuuu |     -30     -65      56    -253      3 |       4     36
grg   uuuuu |       2       5      10     130     -3 |      -5     31
igr   xxxxx |     -40      30     -63      16     19 |     -17     40
irf   xxxxx |      47       3     -10      40      7 |      -8     35
jpl   uuuuu |     -64     -11     -21      89     11 |      16     42
mit   uuuuu |      74     -11     -24     150     -1 |      10     36
ngs   uuuuu |      52      57     -68    -175      3 |       2     38
sio   uuxux |      54      62    -365     -43      3 |      43     57

Table 7.1931.3   GPS week: 1931   Day: 3   MJD: 57764.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -21       8     130     -44     -7 |      -8     34
emr   uuuuu |      13      60    -149      58     -4 |      21     43
esa   uuuuu |     -15     -33      12     -24      0 |       0     34
gfz   uuuuu |     -31     -52     -85    -290     -2 |      -1     34
grg   uuuuu |      -2      -3     -38     113     -1 |      -9     30
igr   xxxxx |     -16      14     -26      76     17 |     -19     40
irf   xxxxx |      32      -3      -2     -26     13 |     -11     35
jpl   uuuuu |     -55      30     -55      63      2 |      11     36
mit   uuuuu |      33      13      56     -93      5 |       5     32
ngs   uuuuu |      46     -28      77     177      4 |      -2     36
sio   uuxux |      63      50    -334     -41      6 |      39     53

Table 7.1931.4   GPS week: 1931   Day: 4   MJD: 57765.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      32       5       0      56    -12 |     -15     32
emr   uuuuu |      19       2    -152     107     17 |      12     32
esa   uuuuu |      -7     -37      44     -63     -9 |      -7     29
gfz   uuuuu |     -47       8    -133    -441      1 |      -8     28
grg   uuuuu |      -7      25      -7     102    -10 |     -14     29
igr   xxxxx |     -20      38      60       5      5 |     -24     38
irf   xxxxx |      26       4      -6     -20     12 |     -15     34
jpl   uuuuu |      -1      -5      31     -31     17 |       4     29
mit   uuuuu |      24      34       9      17      0 |      -1     25
ngs   uuuuu |     -33     -12     134     205     -3 |     -10     28
sio   uuxux |      32      27    -261      54     -2 |      33     45

Table 7.1931.5   GPS week: 1931   Day: 5   MJD: 57766.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -13      14     -31      31     -4 |      -8     24
emr   uuuuu |      23      -1     -33     118     14 |      22     37
esa   uuuuu |     -16     -15      -9     -63     -6 |       1     23
gfz   uuuuu |     -29     -65      -7    -300      5 |       0     24
grg   uuuuu |     -32       0    -131      27      2 |      -8     23
igr   xxxxx |     -12      32     -86      72     11 |     -15     30
irf   xxxxx |      12     -21     -48     -32      5 |      -4     26
jpl   uuuuu |      44      18     214     101     -7 |      15     31
mit   uuuuu |      -5     -11     -16     -16      1 |       7     23
ngs   uuuuu |      18      25     -13     171      1 |      -2     23
sio   uuxux |      11      44    -326     -57     -1 |      42     50

Table 7.1931.6   GPS week: 1931   Day: 6   MJD: 57767.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      23     -21     -52      64      0 |      -5     20
emr   uuuuu |       3      -6     -80     -42     22 |      27     38
esa   uuuuu |     -10      -1      63      24     -3 |       4     20
gfz   uuuuu |     -47     -64     201    -234      0 |       4     20
grg   uuuuu |       7     -23     -16     126      3 |      -4     17
igr   xxxxx |     -19       5     -94      67     11 |      -9     22
irf   xxxxx |      28      -8       8     -43     -3 |       1     20
jpl   uuuuu |     -42     -10     -14     105      3 |      18     30
mit   uuuuu |      21      17      53     -63     -2 |      11     20
ngs   uuuuu |      22      63    -205      19     -4 |       2     18
sio   uuxux |      55      45    -396     -44    -12 |      47     51



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