[IGSREPORT-21692] Wk 1731 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Thu Mar 28 08:54:31 PDT 2013


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1731   (Mar 10, 2013 - Mar 16, 2013)

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 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:

igs1731[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1731[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1731[0-6].cls  IGS GPS clock combination summary report.
igs17317.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs17317.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   | 4 9
                0  |  EMR   | 4 8 9 8 HERS HERS
                0  |  ESA   | 4 9 MATE
                0  |  GFZ   | 30 LHAZ
                0  |  GRG   | 4 8 9 8 MAS1 NICO ASPA MAS1 NICO SCUB USNO
                0  |  JPL   | 8 9 22
                0  |  MIT   | 8 ALGO ALIC AMC2 AUCK BREW BRMU CAS1 CHUR CRO1 DARW
                0  |  MIT   | DAV1 DRAO FLIN GLSV GUAT HERS HNPT HOB2 HYDE IENG
                0  |  MIT   | IRKJ IRKT JOZ2 KOKB KOUR LAMA MAC1 MAR6 MAW1 MDVJ
                0  |  MIT   | MIZU MOBS NICO NRC1 NTUS ONSA PDEL PRDS PTBB SCH2
                0  |  MIT   | SFER SPT0 STJO STR1 SYDN SYOG TIDB TLSE TOW2 TSKB
                0  |  MIT   | TWTF USN3 VILL WES2 WROC WSRT WTZR YEBE YELL
                1  |  COD   | 4 9 4 9 JOZ2 JOZ2 WTZR
                1  |  EMR   | 8 8 MAS1 USNO HERS WES2
                1  |  ESA   | 4 9 4 9 WES2 WES2
                1  |  GRG   | 8 8 NICO NICO
                1  |  JPL   | 8 9
                1  |  MIT   | 8 22 8 21 22 29 NICO WROC HYDE MDVJ NICO WROC WTZR
                2  |  COD   | 4 8 9 4 8 9 ARTU
                2  |  ESA   | 4 8 9 4 8 9 ARTU MAS1 TLSE
                2  |  GFZ   | 8 MATE MCIL NTUS PIMO
                2  |  GRG   | ARTU LHAZ MAS1 POLV
                2  |  JPL   | 9 RAMO
                2  |  MIT   | 14 14 HYDE TLSE TWTF WROC HYDE NTUS TLSE TWTF WROC
                3  |  COD   | 4 8 9 4 8 9
                3  |  EMR   | HERS HERS
                3  |  ESA   | 4 8 9 4 8 9 MAS1
                3  |  GFZ   | 8 DAEJ FAIR GLPS IISC LHAZ MCM4 PIMO THU3 YELL
                3  |  GRG   | MAS1 NICO USNO WROC MAS1 NOVM POLV
                3  |  JPL   | 9
                3  |  MIT   | 14 28 14 28 MDVJ NICO MDVJ NICO
                4  |  COD   | 4 8 9 4 8 9 HNPT JOZ2 WROC HNPT JOZ2
                4  |  EMR   | HARB
                4  |  ESA   | 4 8 9 4 8 9 MATE TNML MAS1 MATE TNML UNSA
                4  |  GFZ   | 3 8 30 MATE
                4  |  GRG   | YELL LHAZ MAS1 YELL
                4  |  MIT   | 15 19 22 26 15 19 22 26 GMAS KOSG
                5  |  COD   | 4 8 9 4 8 9 WROC WROC
                5  |  EMR   | HARB HARB HERS
                5  |  ESA   | 4 8 9 4 8 9 HOLM KOUR LHAZ MDVJ
                5  |  GFZ   | 8 9 DARW MDVJ RAMO
                5  |  GRG   | GLSV NICO USNO ADIS GLSV KOUR MDVJ NICO NTUS
                5  |  JPL   | 9
                5  |  MIT   | 22 11 22 30 DARW KOSG
                6  |  COD   | 8 9 8 9 ARTU HERT MATE HERT MATE NICO
                6  |  EMR   | 4 4 9 HARB HARB
                6  |  ESA   | 8 9 8 9 MATE ARTU
                6  |  GFZ   | 8 9 KOSG LHAZ MKEA TLSE
                6  |  GRG   | NICO TLSE WROC ARTU HARB NICO TLSE WROC
                6  |  JPL   | 4 9
                6  |  MIT   | 4 4 DARW KOUR NICO WROC BOR1 DARW NICO WROC

    
 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  |  MIT   | ~20:15 | ~ -0.60 ns

 6. 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.

 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 G08 |    |  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.
    
    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 |     .5     .7   -1.1     -39      5    -13     .12
       EMR  |   0 |   10.0   -6.8    9.0      11      8      4     .41
       ESA  |   0 |    3.9   -1.4   -3.7      48   -217    185     .10
       GFZ  |   0 |    -.4     .3    -.8     -32    -25    -16     .01
       GRG  |   0 |   -4.8   -8.5    6.6     -24     11    -35     .27
       JPL  |   0 |    2.0   -5.4   15.6     -41     11    -11     .09
       MIT  |   0 |     .3    -.4   12.5       6      4    -28     .06
       NGS  |   0 |    4.8   -5.8    7.3     -89    -27     40     .78
       SIO  |   0 |   -2.7   -1.6     .4      32     -1    156     .12

       COD  |   1 |     .2     .7   -1.0     -33     -9     15     .13
       EMR  |   1 |    5.9  -13.0    6.6      12      2     17     .23
       ESA  |   1 |     .5   -7.9   -2.7     -37   -164    233     .0 
       GFZ  |   1 |    -.1     .7    -.1     -25    -25    -10    -.40
       GRG  |   1 |   -1.3  -11.7   14.6     -26     -1    -34     .36
       JPL  |   1 |    1.6   -8.6   18.6     -76     -2    -12     .28
       MIT  |   1 |   -3.6   -2.3   10.7      -1      3    -18     .08
       NGS  |   1 |    2.6   -8.1     .7     -61    -12     23     .55
       SIO  |   1 |   -3.8     .1    6.6      65     -5    435     .09

       COD  |   2 |     .5    1.3   -1.1     -13      9    -23     .19
       EMR  |   2 |    8.6  -10.9   10.4      11      6     11     .07
       ESA  |   2 |    4.7   -7.2    1.0     -28   -209    219     .17
       GFZ  |   2 |     .0     .5    -.3     -28    -20     -6    -.24
       GRG  |   2 |    5.4  -11.0    8.9     -34     41    -35     .31
       JPL  |   2 |    5.3   -8.4   15.1     -49      6     20     .05
       MIT  |   2 |    1.9   -2.1    6.0       3      8    -25     .04
       NGS  |   2 |    4.4   -8.4    1.4     -64    -21     46     .72
       SIO  |   2 |    2.8     .6   10.0      85    -68    446     .16

       COD  |   3 |     .6    1.1    -.7     -31      4    -35     .25
       EMR  |   3 |    6.7  -12.0   10.6       7      6     11     .26
       ESA  |   3 |    5.0   -4.1   -4.3       3   -244    172     .28
       GFZ  |   3 |    -.4     .4    -.2     -29    -25    -13    -.08
       GRG  |   3 |    3.8   -5.5    3.6     -14      5     -8     .32
       JPL  |   3 |    7.7   -6.3   14.0     -67     -9    -21     .14
       MIT  |   3 |    2.3   -1.5    9.3      -6      1    -23     .01
       NGS  |   3 |    8.8   -4.7   -2.3     -25    -56     81     .63
       SIO  |   3 |    -.1    1.5   11.6      69    -15    310     .22

       COD  |   4 |     .1    1.4    -.8     -31     -2    -19    -.02
       EMR  |   4 |    3.3  -10.3    7.0      10     10      1     .36
       ESA  |   4 |    2.6   -4.1    -.8      -3   -175    148     .16
       GFZ  |   4 |    -.5     .4    -.4     -44    -30     -9    -.09
       GRG  |   4 |   -3.2   -5.7     .0     -27     28    -35     .46
       JPL  |   4 |   -1.4   -3.5   18.2     -40     -8    -62     .04
       MIT  |   4 |    1.6   -3.5    5.9      -4     10    -22     .06
       NGS  |   4 |    1.3   -8.8    -.4     -55     -7     20     .68
       SIO  |   4 |   -5.1   -2.7  -16.4      21    -79    238     .05

       COD  |   5 |    -.6    1.2   -1.8     -40    -18    -24     .19
       EMR  |   5 |    8.2   -6.1   11.2      17     14      1     .29
       ESA  |   5 |    1.8     .9    6.4      66   -113    145     .39
       GFZ  |   5 |     .1     .7     .0     -37    -40     -7    -.20
       GRG  |   5 |    3.1   -2.1    2.7     -36     27    -23     .37
       JPL  |   5 |    1.6   -1.5   14.8     -71     38    -40     .40
       MIT  |   5 |    3.5    3.9   12.6       3      2    -31    -.08
       NGS  |   5 |    5.2    -.4   -4.0       5    -41     38     .57
       SIO  |   5 |   -2.6    2.2   -3.4       7   -123     85     .09

       COD  |   6 |    -.2    1.1   -2.2     -40     -1    -16     .20
       EMR  |   6 |    6.3   -1.4   12.2      21     13      7     .40
       ESA  |   6 |    4.2    1.7    3.6      76   -194    128     .36
       GFZ  |   6 |    -.4     .1    -.2     -63    -27     -9     .25
       GRG  |   6 |    5.1   -1.0    7.9     -32     37    -18     .42
       JPL  |   6 |    8.1    -.2   16.1     -76     -6    -26     .35
       MIT  |   6 |    5.0    4.9   12.3       0      2    -26     .16
       NGS  |   6 |    8.8   -4.2     .2     -41    -65     72     .64
       SIO  |   6 |    1.8    4.5    6.2       3   -142     47     .25


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 1.1731.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1731.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 2.1731.[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 3.1731.[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 5.1731.0-6). 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 1731 summary.                       (Mar 10, 2013 - Mar 16, 2013)

Table 1.1731.a   GPS week: 1731   MJD: 56361.000-56367.000

         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  268|    0     0     2    25     4     1  -.39   11   11 |    -861      36     22     93
        |    0     0     1    26    20    15   .02           |     558    1061
emr   79|    0    -3     2   -34     7    14   .24   18   18 |    3387    -810     14    103
        |    1     1     0    33    12    18   .04           |    1220     740
esa  150|    1     0     1    11   -11     4   .12    6    6 |   -1387     684     11    118
        |    0     0     1    21    18     9   .02           |     985    1253
gfz  199|    0     0    -3   -38   -72    -6  -.36   11   10 |      53    -203     20    106
        |    0     1     1    86    47    10   .02           |     294     523
grg  136|    1     0     0   -19     0   -27   .65   16   16 |     -88      39     19    132
        |    1     1     2    13    14    16   .02           |     304     540
igr  n/a|    0     0     0   -14    72   -32  -.13    5    5 |    -642    -738     17     83
        |    0     0     1    19     9     4   .03           |    1823     697
jpl   80|   -1     0     0    -4    20     7   .37   17   17 |    2466    -948     17    101
        |    0     1     1    19    20    21   .03           |    2174     724
mit  239|    0     0     2    18     0    -1  -.51   11    9 |    -271     354     24    217
        |    1     0     1    12    11    14   .01           |     193     398
ngs  236|    0     0    -5     9    70    -1   .39   11    9 |    -720    -173   1983   3486
        |    0     0     3    31    21    17   .05           |     482     865
sio  287|    0     0     5    -9   -54   234  -.25   19   17 |     ---     ---    ---    ---
        |    1     0     1    27    63   175   .02           |     ---     ---


Table 1.1731.b   GPS week : 1731   MJD: 56361.000-56367.000   

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

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1731.0   GPS week: 1731   Day: 0   MJD: 56361.000                            

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  269|    0     0     1   -17     5     2  -.41   10   10 |   -1146     688     22    111
emr   80|    0    -3     2   -57     2    -5   .28   18   18 |    5532   -1511     15    110
esa  150|    1     0     0    -4   -30    10   .09    7    7 |   -2272     691     11    129
gfz  204|    0     0    -4    68   -51   -25  -.36   14   13 |     125    -607     21    119
grg  134|    0     0     0    -6   -12   -48   .65   17   16 |     201    -275     25    155
igr  n/a|    0     0     0   -33    73   -32  -.15    5    5 |    2305   -1659     17    120
jpl   80|   -1     1     0    -9    30   -22   .37   17   17 |    5844   -1776     17    115
mit  240|    0     0     3    15   -20    26  -.51   13   11 |     -80     403     25    377
ngs  231|   -1     0     0     7    93     5   .40   12   11 |    -903     235   1763   3551
sio  249|    0     0     4   -17    -1   146  -.22   21   19 |     ---     ---    ---    ---

Table 2.1731.1   GPS week: 1731   Day: 1   MJD: 56362.000                            

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  268|    0     0     0    60     2    16  -.43   12   11 |      -7   -1775     24     83
emr   80|    0    -3     4   -73   -14     0   .26   17   17 |    4420    -545     14     93
esa  150|    1     0     1   -19   -14    13   .11    6    6 |   -2241     137     11    120
gfz  201|    0     2    -4    86   -33     2  -.36   11   11 |    -304     -42     21    101
grg  135|    0     0     3   -43     9   -43   .66   17   17 |    -286     517     23    124
igr  n/a|    0     1     1   -30    59   -35  -.08    5    5 |     966    -291     18     74
jpl   80|    0     0     1   -40    -5   -12   .37   18   18 |    4456    -538     17     96
mit  239|   -2     0     4    23     6     4  -.52   11    9 |    -200      20     26    185
ngs  237|    0     1   -10    -8    65   -16   .46   12   10 |      21   -1639   1804   3291
sio  285|   -2     0     8    24    22   458  -.26   19   19 |     ---     ---    ---    ---

Table 2.1731.2   GPS week: 1731   Day: 2   MJD: 56363.000                            

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  270|    0     0     4    37    26   -24  -.38   11   10 |   -1149    1008     24     77
emr   80|   -1    -4     2   -77     9    -9   .20   18   18 |    3356   -1674     18    111
esa  150|    2     0     1    -6     0    14   .12    7    7 |   -1786     933     14    114
gfz  201|    0     1    -5   -22  -113     1  -.36   11   10 |    -122    -380     21    101
grg  137|    0     0    -1   -28    10   -15   .65   16   15 |     261    -657     22    136
igr  n/a|    1     1     0   -38    71   -26  -.11    5    5 |     145   -1432     16     86
jpl   80|   -1     1     0   -12    32    35   .37   18   16 |    3385   -1679     16     91
mit  240|   -2     0     1    16     3    -5  -.50   11    8 |    -176     -48     26    198
ngs  237|   -1     0    -5    36    29    13   .42   12    9 |    -678     304   1998   3839
sio  284|    0     0     6    22   -61   430  -.25   18   18 |     ---     ---    ---    ---

Table 2.1731.3   GPS week: 1731   Day: 3   MJD: 56364.000                            

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  272|    0     0     3    51     1    -1  -.38   14   13 |   -1031     -11     22     86
emr   80|   -2    -4     3   -14    23    17   .24   18   18 |    2730     457     15    104
esa  150|    2     0     0    30   -11    -8   .13    7    6 |   -2271    3246     12    101
gfz  198|   -1     1    -2  -138   -81     2  -.34    9    8 |    -246     873     19    105
grg  139|    3     0    -1   -15    -3   -29   .65   16   15 |    -489     839     18    123
igr  n/a|    0     1     0     2    83   -33  -.15    4    4 |   -1542     206     17     65
jpl   80|    0    -1     1    10    31    12   .42   17   15 |    1599     139     16     95
mit  240|   -1     1     3    15    10    -5  -.51   10    8 |    -452     857     25    149
ngs  237|    0     0    -4    50    72    14   .38   11    9 |    -877    -199   2109   4040
sio  293|    0     2     7     4    -4   297  -.25   18   17 |     ---     ---    ---    ---

Table 2.1731.4   GPS week: 1731   Day: 4   MJD: 56365.000                            

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  269|    0     0     2     6    21    -1  -.37   10   10 |   -1500     793     20     96
emr   80|    0    -3     2    -1    17    29   .24   18   18 |    3083    -960     13     98
esa  150|    1     0     0    26     1     3   .15    6    6 |      26    -640     10    106
gfz  198|    0     0    -1   -86  -117    -7  -.35   11   10 |     333    -488     21    117
grg  138|    1     0    -1    -3   -18    -4   .68   16   15 |    -416     367     18    131
igr  n/a|    0     0    -1    -8    85   -27  -.12    5    5 |   -1538    -935     17     83
jpl   80|   -1    -1     1    17    26    29   .37   18   18 |    1573   -1248     18     99
mit  240|    0     0     3    40    -4     1  -.52   10    8 |    -626     940     25    190
ngs  241|    0     0    -4   -32    81   -22   .35   11    8 |   -1410     602   2302   3401
sio  289|    0     0     5   -13   -72   246  -.27   18   17 |     ---     ---    ---    ---

Table 2.1731.5   GPS week: 1731   Day: 5   MJD: 56366.000                            

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  265|    0     0     2    18     9    -1  -.39   10    9 |    -151   -1059     23    103
emr   80|    0    -3     2    -1     8    38   .29   18   18 |    2715   -1133     15    113
esa  150|    1     0     3    32    12     7   .12    6    5 |    -784     602     11    128
gfz  198|   -1     0    -2   -77  -114    -5  -.36   10    9 |     101    -151     20    103
grg  135|    1     3    -4   -23    -9   -12   .66   15   15 |      88    -355     14    123
igr  n/a|    0     0    -1     6    65   -37  -.17    5    5 |   -2133    -956     17     72
jpl   80|    0    -2     0     5    38    14   .36   17   17 |     628   -1231     19    103
mit  240|    0     0     2    18    -8   -19  -.51   10    9 |    -183     111     21    207
ngs  235|    0     0    -6   -17    61   -19   .40   11    9 |    -222   -1076   1854   3048
sio  306|    1     0     5   -43  -118    61  -.23   18   16 |     ---     ---    ---    ---

Table 2.1731.6   GPS week: 1731   Day: 6   MJD: 56367.000                            

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  269|    1    -1     2    21   -37    23  -.40   11   10 |   -1046     613     25     97
emr   79|    1     0     2   -18     2    28   .18   18   18 |    1873    -308     11     98
esa  150|    1    -1     3    20   -39    -5   .14    6    6 |    -381    -180     11    128
gfz  195|   -1    -2    -1   -98     5   -13  -.40   11   11 |     484    -632     20    101
grg  136|    1     0     0   -13    23   -37   .61   16   15 |      19    -158     15    133
igr  n/a|    0     0    -1     3    67   -38  -.14    5    5 |   -2699     -99     17     87
jpl   80|   -2     0    -1     0   -14    -2   .30   16   16 |    -223    -307     16    110
mit  240|    0     1     1    -3    11    -9  -.52   12   10 |    -180     199     26    213
ngs  235|   -1     0    -7    34    89    17   .30   10    9 |    -977     557   2053   3235
sio  307|    1     0     4   -41  -144     0  -.25   20   15 |     ---     ---    ---    ---

       
       
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 3.1731.0   GPS week: 1731   Day: 0   MJD: 56361.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    9   24    7   17   19    5   13   11   10   13    5 |    40   42   41   37   44   38   39   42   43   39    39
   2E |    6   18    6   14   17    5   19   10   12   11    4 |    26   31   27   22   31   22   30   23   34   26    25
   3  |    5    9    3   11   17    5    8    7    8   24    3 |    14   23   18   13   22   15   20   15   19   23    15
   4E |   13   21    9   11   14    6   16   14   19   14    5 |    44   38   40   40   38   38   36   43   43   43    39
   5  |    9   18    5   14   15    4   19   12    7   13    4 |    20   21   18   28   28   17   22   24   19   17    18
   6  |    6   10    4    9   14    4    9    9    9   18    3 |    15   26   17   18   25   15   21   19   20   27    17
   7E |    9   17    6   12   15    9   19   10   14   11    4 |    31   30   28   32   35   27   32   33   30   29    29
   8E |   18   18   10   15   26    9   20   22   14   25    6 |    98   99  105  101   98  102   97  108  103  101   100
   9E |   11   22   10   12   21    5   22   17   17   18    5 |    80   77   74   79   73   78   81   84   88   78    78
  10  |    9   14    8    9   14    5   15   10    9   13    4 |    29   25   34   36   38   28   27   35   34   30    31
  11  |    9   12    6   12   25    3   15   14   12   21    4 |    23   35   28   25   43   26   30   24   37   26    27
  12  |   16   22    7   13   19    6   24   11   12   17    5 |    22   27   19   18   31   16   25   25   25   22    19
  13  |    6   16    8   13   19    5   16   13   12   19    4 |    28   34   26   30   38   23   31   27   29   26    27
  14  |    9   15    6   14   15    6   14   13   10   29    4 |    32   34   30   37   41   29   32   36   29   33    32
  15  |   21   22    7   15   13    5   26   16   15   31    6 |    32   33   30   37   40   28   32   30   34   34    29
  16  |    8   18    7   12   15    4   21    8   14   22    4 |    15   26   19   22   31   17   26   15   23   17    18
  17  |   14   19    9   20   16    4   20   10   14   32    5 |    26   36   24   21   33   22   34   23   32   29    24
  18  |    9   21    4   15   16    4   19   14   10   22    4 |    20   26   21   28   31   18   26   26   19   26    20
  19  |   12   16    6   12   17    5   17    9   13   25    4 |    22   35   26   22   27   23   34   24   32   28    24
  20  |    8   22    8   18   18    6   20   27   15   27    6 |    29   35   27   36   32   25   32   28   28   27    27
  21E |    8   13    4   13   13    4   15    6   13   25    4 |    23   28   28   22   34   24   28   24   27   30    24
  22  |    7   17    4   11   18    4   17   16   14   21    4 |    24   28   29   32   42   26   28   30   29   28    27
  23  |    8   17    8   16   15    5   16   20   11   24    5 |    29   31   26   34   33   24   31   27   28   26    27
  24E |   12   21    9   15   13    5   15   15    8   17    5 |    28   32   34   29   35   29   36   37   31   38    30
  25  |    9   18    4   14   16    6   18   12   11   13    4 |    19   24   22   20   33   18   32   27   22   27    21
  26  |    8   14    7   12   15    5   14    9   13   22    4 |    15   25   21   24   29   18   22   19   22   21    19
 X27  |    6  ---  ---  ---  ---   74  ---  ---  ---  ---    0 |    28  ---  ---  ---  ---   28  ---  ---  ---  ---    28
  28  |   10   20    7   15   17    6   22   11   10   21    4 |    17   29   25   27   37   19   27   26   24   23    22
  29  |   11   18    7   12   13    5   20    9   10   34    4 |    24   38   27   24   26   26   41   29   28   34    27
  30  |    7   11    5   11   19    4   11    6   12   13    3 |    20   31   23   25   29   22   30   23   28   25    23
  31E |   11   20    6   12   16    6   17   10   11   10    4 |    25   31   24   23   34   21   27   25   29   28    23
  32  |    6   12    4   14   19    4   11    8   11   12    3 |    34   35   32   40   41   33   32   37   33   35    35
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   18    7   14   17    5   17   13   12   21      |T   29   34   30   31   37   27   33   31   32   32    29
 WRMS |   10   18    7   13   16    5   17   11   11   19      |NE  23   29   24   27   33   22   28   25   27   26    24
 MEDI |    9   18    7   13   16    5   17   11   12   21      |MD  25   31   27   28   34   24   31   27   29   28    27

Table 3.1731.1   GPS week: 1731   Day: 1   MJD: 56362.000                            

        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 |   13   25    7   12   26    6   16   12   14   13    5 |    61   68   62   57   69   60   61   59   57   63    60
   2E |    8   19    7   11   18    3   23   10   14   16    5 |    27   31   30   25   30   25   31   23   28   27    26
   3  |   11   11    4   12   21    4   10    7   14   23    4 |    19   25   19   23   23   20   23   18   32   22    20
   4E |   14   18    9    9   15    4   15   16   19   22    5 |    33   33   31   32   31   29   31   32   33   28    30
   5  |    7   17    6   14   15    5   19   12    8   12    4 |    21   22   17   24   26   17   23   19   19   16    18
   6  |    7   11    3   12   16    4    9    8   12   17    3 |    17   23   17   24   22   18   23   18   27   22    19
   7E |   11   16    5   10   16    4   16   11   11   12    4 |    19   24   15   20   29   17   23   24   20   21    19
   8E |   16   21    9   13   24    8   18   18   16   23    6 |   148  139  142  146  144  141  141  152  143  139   143
   9E |   14   23    8   10   16    5   20   15   11   23    5 |    77   84   79   74   77   78   79   78   78   81    77
  10  |   10   13    5    8   16    1   15    7   11   10    3 |    27   27   23   31   28   24   22   23   25   22    25
  11  |    7   13    7   13   24    5   14    8   17   15    4 |    20   30   25   25   39   23   29   21   31   21    24
  12  |   20   23    7    8   19    3   24   13   13   19    5 |    28   37   24   24   38   24   31   25   28   28    26
  13  |    7   18    5   10   18    3   16   10   11   16    4 |    18   30   17   20   33   16   28   21   24   19    19
  14  |   12   14    5   13   10    5   16   10   10   24    4 |    26   34   27   33   32   28   31   29   31   24    29
  15  |   20   22    5   12   13    6   27   13   12   26    5 |    23   30   22   24   34   22   28   21   30   23    22
  16  |    7   18    5   14   20    4   19    7   11   22    4 |    16   27   17   24   32   19   28   15   24   15    19
  17  |   13   19    7   19   14    4   20   10   13   28    5 |    25   34   20   20   32   20   33   20   31   24    22
  18  |   11   19    6   14   16    7   20   10    8   18    4 |    21   28   23   27   30   22   27   22   22   23    23
  19  |   11   16    7    9   18    5   18   12   13   23    4 |    24   33   25   25   27   23   33   25   36   25    26
  20  |   10   19    7   11   15    6   23   19   13   18    5 |    24   28   21   25   25   18   27   24   22   22    21
  21E |    8   10    5   10   15    6   16    7   13   18    3 |    24   28   26   27   34   23   29   26   29   27    25
  22  |   10   17    6   10   16    5   19   11   10   16    4 |    26   30   26   28   37   26   27   24   27   25    26
  23  |    7   17    7   13   13    4   17   12   13   19    4 |    19   28   18   23   27   17   25   22   23   20    20
  24E |   11   22    8   11   14    5   15   14    9   19    4 |    17   25   24   20   28   19   27   20   23   27    19
  25  |   12   14    4   11   15    6   17   13   15   13    4 |    22   24   20   20   34   19   33   21   25   25    21
  26  |    9   13    6    9   13    4   13    9    5   20    3 |    15   22   18   17   22   14   19   13   21   20    16
 X27  |    7  ---  ---  ---  ---   46  ---  ---  ---  ---    0 |    41  ---  ---  ---  ---   41  ---  ---  ---  ---    39
  28  |   12   20    8   11   19    5   21   10   11   21    5 |    15   28   21   20   36   18   25   19   23   21    20
  29  |   12   18    6   11   15    8   24    8   12   30    4 |    24   31   20   23   26   21   32   23   24   29    22
  30  |    8   13    4    9   17    3   13    7   11   17    3 |    23   32   22   27   28   23   30   22   31   20    25
  31E |   16   21    4    8   17    7   17   10    9   15    4 |    27   33   20   24   35   18   27   21   28   20    24
  32  |   15   11    5   12   17    4   12    6   11   12    4 |    30   35   28   33   35   29   29   32   35   30    31
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   12   17    6   11   17    5   18   11   12   19      |T   29   35   29   31   36   28   34   29   33   29    29
 WRMS |   11   17    6   11   17    5   18    9   10   19      |NE  22   29   21   24   30   21   27   21   26   22    23
 MEDI |   11   18    6   11   16    5   17   10   12   18      |MD  24   30   22   24   32   22   28   22   28   23    23

Table 3.1731.2   GPS week: 1731   Day: 2   MJD: 56363.000                            

        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   24    6   12   20    5   13   10   14   11    4 |    32   30   36   33   39   32   36   36   44   30    33
   2E |    9   19    7   10   17    4   21   12   14   14    4 |    26   30   27   23   33   23   31   19   33   22    25
   3  |    7   11    6   10   18    4   10    5   11   20    3 |    13   22   20   18   23   16   20   13   27   15    16
   4E |   15   18    8    8   12    8   17   20   23   21    5 |    35   30   33   34   33   31   29   34   37   32    30
   5  |    8   18    7    9   17    5   21    9   10   14    4 |    25   22   25   22   31   18   25   21   23   18    20
   6  |    6   11    5   11   13    3    9    7   12   13    3 |    16   21   20   21   23   15   22   15   22   19    16
   7E |   10   17    8   11   12    5   18   14   11   18    4 |    29   27   32   24   29   25   31   27   29   25    24
   8E |   18   23   14   13   22   13   25   32   21   21    8 |    62   74   71   65   69   69   71   63   67   66    64
   9E |   15   22   10    9   16    5   22   13   13   26    5 |    41   55   49   44   48   44   53   44   48   53    45
  10  |    9   15    6    7   16    4   15    7   12   10    4 |    28   23   33   31   38   27   25   27   35   24    28
  11  |    8   13    9   11   23    3   10    9   17   16    4 |    22   31   27   26   42   23   28   22   39   22    25
  12  |   12   22    7    7   17    4   23    9   11   19    4 |    24   30   24   24   32   19   25   20   27   22    21
  13  |    7   16    9   10   15    4   16    7   10   15    4 |    19   30   25   25   34   20   30   22   23   20    21
  14  |    8   16    4   12   12    4   15    8   13   22    4 |    24   30   26   31   33   24   29   26   26   23    26
  15  |   20   22    6   11   16    6   26    8    8   24    5 |    25   31   29   29   35   27   30   22   30   24    24
  16  |    7   20    6   11   16    3   23    6    9   21    4 |    19   25   20   21   29   17   26   14   23   14    18
  17  |   15   23    8   15   15    5   20   11   11   29    5 |    22   35   23   20   34   22   34   19   26   25    21
  18  |    8   19    5   14   14    4   22    9   10   19    4 |    16   22   20   24   26   16   23   18   21   16    17
  19  |   11   17    7    9   16    6   19    9   13   23    4 |    22   32   26   23   28   22   32   22   34   22    23
  20  |   12   20    7   10   17    4   19   14    8   17    4 |    21   30   26   27   31   21   25   23   26   18    21
  21E |    7   12    4   10   16    2   16    5   10   16    3 |    27   33   37   27   36   31   36   29   38   30    30
  22  |    6   16    5   11   15    5   18   10    9   15    4 |    17   24   25   27   34   21   25   22   31   20    22
  23  |    7   16    9   12   13    3   15    8    9   18    4 |    18   27   24   26   29   20   27   21   23   18    21
  24E |   11   23    8   14   12    3   15   12    8   17    4 |    24   27   30   24   34   25   29   25   31   27    24
  25  |   12   17    6   10   11    5   17   10    8   12    4 |    18   20   25   18   31   18   30   20   27   19    19
  26  |    8   14    5   10   13    5   13    7    6   16    3 |    15   22   22   19   27   18   22   18   24   18    17
 X27  |    7  ---  ---  ---  ---  166  ---  ---  ---  ---    0 |   108  ---  ---  ---  ---   69  ---  ---  ---  ---   107
  28  |    9   27    6   11   15    6   17    8    7   18    4 |    16   29   24   20   32   17   25   19   25   18    17
  29  |    9   19    5   10   13    6   24    7    9   25    4 |    20   31   25   24   26   20   33   23   26   24    22
  30  |    8   13    4   10   16    3   14    6   10   15    3 |    22   29   25   23   28   22   30   23   26   20    23
  31E |    8   21    6    9   13    4   19    8   13   11    4 |    26   32   27   27   35   23   31   26   33   27    26
  32  |    7   13    6   10   15    4    9    7   12   14    3 |    17   25   25   26   32   21   23   24   26   21    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   18    7   11   16    5   18   11   12   18      |T   26   29   28   26   33   25   30   24   30   24    27
 WRMS |   10   18    7   10   15    5   16    8    9   18      |NE  23   26   24   23   30   22   26   20   26   20    24
 MEDI |    8   18    6   10   15    4   17    9   11   17      |MD  22   30   25   24   32   22   29   22   27   22    22

Table 3.1731.3   GPS week: 1731   Day: 3   MJD: 56364.000                            

        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 |   20   27    5    7   12    4   14    7   11   13    4 |    54   50   51   47   53   47   47   46   48   45    47
   2E |   13   19    7   10   21    4   21    8   12   11    4 |    33   32   34   27   38   28   34   25   32   26    29
   3  |    9   10    3    9   16    3   11    6   10   20    3 |    18   23   25   16   22   18   26   15   28   14    18
   4E |   17   18    7    9   15    6   16   16   20   18    5 |    45   39   39   42   41   40   38   41   44   38    39
   5  |   11   17    5    9   17    4   14    7   10   14    4 |    28   24   27   26   33   22   26   24   25   20    22
   6  |    8   12    4    8   12    4   13    8   11   14    3 |    18   22   23   17   22   17   26   17   27   18    18
   7E |   20   15    6    9   16    4   17    9   15    9    4 |    36   27   29   25   30   23   30   26   31   25    25
   8E |   25   23   13   14   25    8   23   28   18   26    7 |    97   89   92   86   93   88   92   96   96   89    90
   9E |   23   26   11    9   18    5   20   13   14   32    6 |    87   87   84   83   80   81   88   83   85   88    83
  10  |   12   12    4    6   15    3   12    7   10    8    3 |    36   29   38   38   41   33   31   33   33   29    34
  11  |    6   13    7    8   22    3   12    8    8   16    3 |    24   32   32   25   39   24   30   23   34   22    26
  12  |   19   19    8    6   21    4   20   12    7   18    5 |    28   24   22   18   32   16   27   19   25   18    18
  13  |    9   16    5   10   15    2   15    6   11   15    3 |    34   38   31   29   36   26   35   27   33   28    29
  14  |    7   14    5    9   11    3   14    7    9   17    3 |    27   31   32   33   37   28   33   29   34   26    30
  15  |   28   21    7    9   15    4   22    7   12   23    5 |    32   32   31   28   34   25   32   24   32   22    26
  16  |    9   20    7   13   17    3   21    6   15   21    4 |    20   27   24   24   29   20   29   18   25   16    19
  17  |   17   20    6   14   13    4   19   10   13   30    5 |    32   36   27   23   34   23   36   23   33   26    25
  18  |    8   20    6   10   15    3   17    7   10   18    4 |    25   23   25   24   29   19   23   20   24   14    20
  19  |   15   17    8    8   12    6   19    8   14   23    4 |    24   35   31   24   31   26   37   25   40   22    27
  20  |   10   19    6    9   15    3   19   10   10   17    4 |    28   33   24   29   28   22   30   24   27   23    24
  21E |    7   11    4    9   15    5   14    4    9   13    3 |    28   28   33   22   34   25   32   23   34   24    27
  22  |    9   18    7    8   17    3   17   11    8   14    4 |    26   25   30   27   36   25   27   26   28   20    25
  23  |    8   17    6   11   13    3   14    6   11   18    3 |    31   34   30   29   33   25   33   25   31   25    28
  24E |    9   21    8    9   12    5   14   13   11   14    4 |    27   27   32   27   34   28   34   31   32   29    27
  25  |   15   17    5    7   17    5   15    8    6    9    4 |    22   24   26   20   32   21   34   23   25   23    22
  26  |   14   13    7    6   15    5   10    7    9   18    3 |    24   24   26   21   26   20   27   22   25   18    21
 X27  |    6  ---  ---  ---  ---  204  ---  ---  ---  ---    0 |   121  ---  ---  ---  ---  115  ---  ---  ---  ---   118
  28  |   17   23    7    8   15    3   19    8   12   20    4 |    29   28   29   24   36   22   28   27   32   20    24
  29  |   18   19    5    7   15    7   21    6    7   22    4 |    24   36   31   25   30   26   38   27   31   26    27
  30  |   10   13    4    5   13    3   12    8    7   11    3 |    29   34   31   28   34   28   37   30   35   23    29
  31E |   12   23    9   15   11    5   18    7   10    9    4 |    27   32   28   21   34   23   29   23   29   25    24
  32  |    8   13    5    7   14    4   11    6    9   13    3 |    34   33   35   35   36   30   35   35   33   32    33
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   14   18    7    9   16    4   17   10   11   18      |T   35   34   33   30   37   31   35   30   35   28    32
 WRMS |   13   18    6    8   15    4   15    8    9   17      |NE  31   29   28   25   32   27   30   24   30   22    28
 MEDI |   11   18    6    9   15    4   16    8   10   17      |MD  28   32   31   26   34   25   32   25   32   24    26

Table 3.1731.4   GPS week: 1731   Day: 4   MJD: 56365.000                            

        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   25    5    6   13    3   15    7   11   12    4 |    39   39   35   36   42   35   38   34   38   37    35
   2E |    7   20    6   10   20    4   21   10   11   12    4 |    23   27   29   22   30   22   28   19   32   21    23
   3  |    8   11    4   10   14    3   12    7   11   20    3 |    16   24   22   22   23   18   21   17   27   16    19
   4E |   15   18    8    8   14    5   18   13   18   17    5 |    36   37   39   41   34   37   37   37   46   34    37
   5  |    8   16    6   12   16    5   20    7    8   15    4 |    20   24   21   24   29   20   24   20   23   18    19
   6  |    7   12    5   10   10    3   12    8   10   14    3 |    20   26   23   25   26   19   25   22   24   22    21
   7E |   13   17    7    9   13    6   17    7   10    8    4 |    30   31   31   32   35   27   34   33   32   29    29
   8E |   15   21   13   11   24    8   25   27   16   23    7 |    53   50   52   49   53   49   54   69   57   58    52
   9E |   14   24    8   10   19    7   21   14   10   31    5 |    58   64   58   58   60   58   67   63   58   71    58
  10  |    7   15    5    8   19    4   13    6   10    9    3 |    26   26   30   34   33   28   25   27   30   25    28
  11  |    7   12    4   10   21    5   12    6    9   16    3 |    23   29   26   26   40   24   28   22   28   23    25
  12  |   11   19    6    8   19    4   23   10    8   19    4 |    19   27   21   22   34   20   26   20   28   21    20
  13  |    7   18    6    9   14    5   18    6    9   16    3 |    26   34   28   32   38   28   33   27   30   24    28
  14  |    9   15    6   16   15    4   17    6   13   17    4 |    29   33   30   37   36   28   34   29   32   26    30
  15  |   14   24    5   12   16    4   23    7    9   23    4 |    23   34   28   28   35   25   33   24   30   24    25
  16  |    6   20    6   14   15    6   22    8   10   20    4 |    19   27   22   30   34   21   28   22   23   17    22
  17  |   17   19    8   16   13    3   22   12   15   30    5 |    26   35   29   29   34   27   38   29   32   28    27
  18  |    9   19    3   13   16    3   19    7    9   20    4 |    22   24   24   25   30   21   25   22   23   17    21
  19  |   11   18    7   10   10    5   20    9   11   22    4 |    25   34   27   26   31   24   34   25   31   23    26
  20  |    8   18    4    9   15    4   19   10    7   18    4 |    22   31   24   29   32   24   28   26   25   21    24
  21E |    6   14    4   10   15    4   17    5    8   11    3 |    29   33   32   27   38   29   36   28   31   28    29
  22  |    7   16    6   15   15    4   18    9    9   15    4 |    26   28   30   33   38   28   29   26   26   21    27
  23  |    5   16    5   11   11    5   19    7    9   20    3 |    27   33   28   33   33   29   30   28   33   22    28
  24E |   10   19    6   10   16    4   15   10   14   16    4 |    23   27   27   25   36   25   30   28   33   27    25
  25  |   14   16    5    7   15    4   15    8    4   10    3 |    19   25   22   23   35   20   31   20   25   21    21
  26  |   10   12    5    9   18    5   13    9   12   21    3 |    20   24   24   22   25   18   25   21   24   22    20
  28  |   11   20    6   11   19    4   21   11    9   19    4 |    23   28   27   27   37   23   29   29   25   23    24
  29  |   16   21    5    9   18    6   24    6   10   24    4 |    27   38   30   27   30   26   40   26   34   27    28
  30  |    8   16    4   10   11    4   12    9   10   11    3 |    27   37   28   32   35   27   34   31   29   28    29
  31E |   11   22    6    8   15    5   18    8   10    8    4 |    23   29   23   26   32   21   26   22   30   22    23
  32  |    7   11    3    9   13    6   10    6    8   16    3 |    28   34   29   31   37   29   29   31   30   31    30
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   18    6   11   16    5   18   10   11   18      |T   26   32   29   30   35   26   32   28   31   26    27
 WRMS |   10   18    6   10   15    5   18    8    8   17      |NE  23   29   26   28   32   23   29   24   27   22    24
 MEDI |    9   18    6   10   15    4   18    8   10   17      |MD  25   31   28   28   34   25   30   26   30   23    26

Table 3.1731.5   GPS week: 1731   Day: 5   MJD: 56366.000                            

        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   24    5    7   14    5   16    8    8   11    4 |    31   33   32   32   38   30   34   30   31   33    30
   2E |    8   18    5    9   22    3   23   10    9   10    4 |    21   26   23   20   33   20   27   14   29   18    21
   3  |    5   12    4    8   13    4   11    5   10   22    3 |    12   21   17   13   21   12   19   14   23   12    14
   4E |   14   21    7    8   16    7   16   13   18   17    5 |    39   37   36   37   36   38   35   33   41   30    35
   5  |    8   18    5   10   19    3   18   11    9   19    4 |    16   22   19   22   30   18   23   19   21   17    17
   6  |    5   13    4    7   10    4   11    9   11   15    3 |    17   24   18   20   24   16   24   21   25   19    19
   7E |    9   16    6    8   13    6   16    6    9    7    3 |    23   23   23   23   25   20   25   25   26   20    21
   8E |   14   22   10   11   21    8   24   24   16   19    6 |    74   73   71   71   78   73   77   80   78   75    72
   9E |   16   26    7   11   17    7   21   11   10   30    5 |    82   87   82   85   83   86   88   85   82   89    83
  10  |    9   15    4    7   16    4   12   10    5   10    3 |    25   26   29   27   33   25   27   28   29   27    27
  11  |    9   13    5    9   21    4   12    8    9   17    3 |    19   25   19   19   37   18   23   18   27   19    19
  12  |   11   20    7    8   16    6   22    9    8   21    4 |    16   26   19   20   30   14   26   15   25   18    18
  13  |    9   17    4    7   15    5   18    9    9   18    3 |    18   30   16   20   33   17   28   18   19   15    17
  14  |    7   16    6   11   14    6   12    7   10   17    3 |    24   28   27   28   33   23   29   25   30   23    26
  15  |   12   21    6    8   13    5   20    9   10   23    4 |    16   30   24   24   32   22   29   20   27   19    21
  16  |    7   21    6   10   17    4   24   11   13   21    4 |    17   25   21   23   33   18   26   19   21   16    19
  17  |   14   20    8   15   12    5   20   14   13   31    5 |    20   32   22   19   30   20   30   21   27   23    20
  18  |    9   22    6   13   13    4   15    6   12   19    4 |    20   22   21   22   26   19   23   21   21   17    18
  19  |    9   18    7    8   11    6   19   11   14   24    4 |    18   31   21   21   29   18   30   23   27   18    20
  20  |   10   17    4   10   14    4   19   10   11   18    4 |    16   21   15   20   25   14   21   19   16   17    14
  21E |    8   15    5   10   13    3   11    5   12   11    3 |    21   24   23   21   30   21   26   19   27   19    21
  22  |    7   18    5   11   16    6   15   11   10   14    4 |    22   23   25   26   34   24   24   26   25   21    22
  23  |    7   15    4    8   14    4   15    6    7   19    3 |    20   25   17   21   27   19   26   19   18   15    19
  24E |    9   23    7   14   13    5   11   10   15   14    4 |    22   20   25   24   32   19   28   16   28   19    21
  25  |   10   17    5    9   13    4   14    8   10    9    3 |    15   20   21   19   30   14   29   16   21   18    17
  26  |   11   13    6    8   15    5    9    7   11   17    3 |    12   20   19   16   21   15   20   12   24   18    15
  28  |   13   22    5   14   17    3   22   18   10   19    5 |    16   26   20   23   32   15   27   19   21   16    17
  29  |   13   19    5    9   17    8   19    7    9   26    4 |    23   31   21   25   25   19   30   21   29   23    22
  30  |    7   13    4    7   12    6   14    7   11   14    3 |    32   38   34   36   38   31   39   34   37   31    34
  31E |    7   24    6    8   16    7   16    9   17   10    4 |    20   28   22   22   27   17   23   18   31   20    20
  32  |    8   11    4    9   12    5   12    8    8   10    3 |    23   30   23   29   31   24   29   27   27   28    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   18    6   10   15    5   17   10   11   18      |T   24   29   25   26   33   23   30   25   29   24    24
 WRMS |    9   18    5    9   15    5   17    9    9   16      |NE  18   26   21   22   29   18   26   20   24   19    20
 MEDI |    9   18    5    9   14    5   16    9   10   17      |MD  20   26   22   22   31   19   27   20   27   19    20

Table 3.1731.6   GPS week: 1731   Day: 6   MJD: 56367.000                            

        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   27    4    9   15    5   12    9    8   11    4 |    42   42   39   37   48   38   46   40   44   41    40
   2E |    8   15    6   10   17    4   22   11    9   10    4 |    30   32   31   27   34   29   35   26   33   28    29
   3  |    8   13    4   10   15    3   11    9   10   22    3 |    16   25   19   17   23   17   24   19   24   17    18
   4E |   12   18    9    8   16    5   17   16   18   19    5 |    55   51   53   55   50   54   51   53   56   52    52
   5  |    9   16    4   14   17    4   14   13   16   21    4 |    23   20   20   27   31   19   22   22   25   19    20
   6  |    7   12    4   10   11    3   10   10    9   17    3 |    17   22   19   17   22   16   23   21   20   22    18
   7E |   12   15    7   11   13    4   15    6   12    8    4 |    34   35   33   36   36   32   35   37   37   32    34
   8E |   16   20   12   15   19    8   25   22   12   15    6 |    60   72   66   61   70   61   71   63   65   63    63
   9E |   14   26    7   12   18    8   19   10    8   30    5 |    80   90   85   82   85   80   85   78   80   91    82
  10  |    8   13    6   11   18    5   12    7   10    9    3 |    35   30   37   40   44   36   31   38   33   34    36
  11  |    8   13    7   10   20    4    8   11   11   16    4 |    24   29   25   24   37   22   29   24   29   27    24
  12  |   13   23    6    9   18    4   18    9   12   22    4 |    25   25   20   18   33   17   24   20   23   23    19
  13  |    7   20    5    9   16    4   17   10    8   21    4 |    32   38   31   33   40   32   38   33   31   30    32
  14  |    9   16    5   15   11    5   16    7   11   24    4 |    32   36   33   42   39   32   33   36   31   33    34
  15  |   12   22    6   12   15    4   19    9   10   27    4 |    28   33   32   36   40   31   34   28   32   26    30
  16  |    6   19    6   12   16    4   21   16   11   22    4 |    20   27   22   21   30   18   27   21   21   19    19
  17  |   18   20    9   14   15    5   18   12   11   38    5 |    31   38   30   27   33   28   37   32   31   42    28
  18  |    7   17    5   15   14    5   16    7    8   19    4 |    23   23   18   27   28   18   21   23   19   21    19
  19  |   14   17    5   10   13    4   18   12   11   24    4 |    27   35   27   24   30   26   37   26   34   26    27
  20  |   10   16    4    7   18    4   17   11   12   19    4 |    26   27   22   25   30   21   24   26   24   29    24
  21E |   10   13    4   10   16    3   15    6   10   14    3 |    27   30   28   24   35   28   33   28   29   30    27
  22  |    9   16    4   12   16    6   13   13    7   15    4 |    28   27   26   33   39   25   24   30   25   27    26
  23  |    6   14    5    8   13    4   14   10    8   21    3 |    32   34   29   32   37   30   34   30   32   27    31
  24E |   13   23    6   13   15    4   14   17   11   14    5 |    34   39   35   31   44   34   40   39   34   35    35
  25  |    8   22    5    9   12    3   15    8   10    8    4 |    25   28   23   18   33   20   31   22   24   21    22
  26  |   13   12    6   14   14    4    8    9    8   18    3 |    27   28   25   28   31   24   29   25   24   22    26
  28  |   14   19    5   15   15    5   16   23   11   20    5 |    24   28   29   32   38   25   32   39   27   29    27
  29  |   11   19    6   11   12    5   20    8    6   30    4 |    28   40   28   27   32   27   41   31   34   34    30
  30  |    8   14    4    9   18    5   13   11    8   15    3 |    26   33   26   27   31   24   33   27   26   24    26
  31E |   12   21    7    9   20    5   20   10    9   11    4 |    33   35   28   27   37   28   33   30   31   32    29
  32  |   10   11    4   10   15    5   10    9    9   11    3 |    31   32   32   33   44   31   35   35   34   30    33
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   18    6   11   16    5   16   12   10   20      |T   31   34   31   31   38   29   35   32   32   31    30
 WRMS |   10   18    6   11   15    4   16   10    9   15      |NE  26   29   26   27   33   24   30   27   27   26    25
 MEDI |   10   17    5   10   15    4   16   10   10   19      |MD  28   32   28   27   36   28   33   30   31   29    28



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 4.1731   GPS week: 1731   MJD: 56361.0-56367.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3002 |U    4     4    10 |U    7     9    21 |U    6     5    14 |
emr | emr 2963 |     6     6    15 |U    8     9    23 |     9     9    20 |
esa | esa 2976 |     4     4    10 |U    7     9    21 |     7     6    16 |
gfz | gfz 2962 |U    4     4    11 |U    7     9    24 |U    8     8    18 |
grg | grg 2975 |U    6     7    19 |U    8    10    27 |    13    11    24 |
igr | igr 2975 |     4     4    10 |     7     8    21 |     6     5    16 |
igs | igs 2929 |     4     4    10 |     7     9    23 |    10     7    17 |
jpl | jpl 2962 |     6     6    14 |U    7    10    23 |U    9     8    18 |
mit | mit 2976 |     4     4    12 |U    8    10    27 |U   12    10    24 |



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 5.1731.0   GPS week: 1731   Day: 0   MJD: 56361.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3025 |     5     8    10 |     8     9    20 |     6     4    15 |
emr | emr 2964 |     6    10    14 |     8    12    26 |    10     8    19 |
esa | esa 2976 |     4     9     8 |     8     9    22 |     7     6    15 |
gfz | gfz 2962 |     5    10     9 |     8     9    25 |     9     8    17 |
grg | grg 2976 |     5    10    17 |     8    12    29 |    15    13    23 |
igr | igr 2975 |     4     9     8 |     8     9    23 |     7     6    14 |
igs | igs 2936 |     4     9     7 |     8     8    24 |    10     8    20 |
jpl | jpl 2963 |     7    11    15 |     8    12    28 |     8     7    14 |
mit | mit 2976 |     5     9    18 |     8     9    29 |    16    10    36 |

Table 5.1731.1   GPS week: 1731   Day: 1   MJD: 56362.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3032 |     3     3    13 |     7    11    21 |     6     4    16 |
emr | emr 2964 |     5     6    13 |     9     9    21 |     8     8    18 |
esa | esa 2976 |     4     3     8 |     8     9    17 |     6     4    16 |
gfz | gfz 2963 |     4     4    12 |     7     7    20 |     7     6    19 |
grg | grg 2976 |     7     8    19 |     9     7    30 |    13     7    23 |
igr | igr 2976 |     5     3    10 |     7     8    17 |     5     4    16 |
igs | igs 2927 |     4     3     8 |     7     9    22 |    10     6    15 |
jpl | jpl 2963 |     6     6    14 |     8    11    20 |     8     7    16 |
mit | mit 2976 |     5     4    14 |     9    14    30 |    12    11    22 |

Table 5.1731.2   GPS week: 1731   Day: 2   MJD: 56363.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3022 |     4     2     8 |     9    12    23 |     6     6    13 |
emr | emr 2964 |     5     5    15 |     9    11    30 |     9    11    19 |
esa | esa 2976 |     4     3     8 |     9    13    25 |     7     6    15 |
gfz | gfz 2961 |     4     3     9 |     9    12    26 |     9     9    16 |
grg | grg 2976 |     6     6    17 |    11    15    33 |    15    15    27 |
igr | igr 2976 |     4     3     8 |     9    12    23 |     6     7    14 |
igs | igs 2923 |     4     3     9 |     9    13    28 |    10     7    18 |
jpl | jpl 2964 |     6     4    12 |     9    11    29 |     9     8    16 |
mit | mit 2976 |     4     3    10 |     9    12    30 |    13    11    24 |

Table 5.1731.3   GPS week: 1731   Day: 3   MJD: 56364.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3013 |     4     4    11 |     9     6    26 |     6     6    14 |
emr | emr 2964 |     6     5    14 |     8     6    24 |     8     9    19 |
esa | esa 2976 |     4     3     9 |     9     5    24 |     6     6    15 |
gfz | gfz 2962 |     4     3    10 |     8     6    28 |     8     9    16 |
grg | grg 2976 |     7     6    23 |    10     8    27 |    12     9    25 |
igr | igr 2975 |     4     3    10 |     8     5    24 |     6     5    15 |
igs | igs 2936 |     4     3    10 |     9     6    23 |    12     9    21 |
jpl | jpl 2963 |     6     4    15 |     9     7    21 |     8     9    17 |
mit | mit 2976 |     4     4    10 |     9     7    29 |    11    10    22 |

Table 5.1731.4   GPS week: 1731   Day: 4   MJD: 56365.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     3     3    11 |     6     6    18 |     7     5    13 |
emr | emr 2964 |     7     5    18 |     7     7    18 |     8     9    23 |
esa | esa 2976 |     4     4    12 |     6     6    18 |     7     6    15 |
gfz | gfz 2964 |     4     4    13 |     6     7    22 |     9     9    22 |
grg | grg 2976 |     6     5    20 |     7     8    24 |    15    12    25 |
igr | igr 2976 |     4     4    12 |     6     6    20 |     7     6    17 |
igs | igs 2969 |     4     4    13 |     6     6    18 |     8     7    15 |
jpl | jpl 2960 |     6     6    18 |     6     7    18 |     9     8    23 |
mit | mit 2976 |     5     3    11 |     7     7    24 |    11    11    26 |

Table 5.1731.5   GPS week: 1731   Day: 5   MJD: 56366.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2975 |     3     3     8 |     5    10    18 |     6     5    14 |
emr | emr 2963 |     7     6    17 |     6     9    14 |     8     9    21 |
esa | esa 2976 |     3     4     9 |     5     8    18 |     6     7    17 |
gfz | gfz 2965 |     3     3    10 |     6     9    21 |     7     9    19 |
grg | grg 2974 |     6     6    14 |     6     8    20 |    14    12    25 |
igr | igr 2975 |     4     4    10 |     5     9    20 |     5     6    16 |
igs | igs 2922 |     4     4    10 |     5     8    17 |    12     8    15 |
jpl | jpl 2963 |     5     5    14 |     6     9    17 |     9     9    20 |
mit | mit 2976 |     3     4    10 |     5    12    20 |     8     9    19 |

Table 5.1731.6   GPS week: 1731   Day: 6   MJD: 56367.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     4     3    10 |     7    11    24 |     6     6    13 |
emr | emr 2964 |     8     4    15 |     8    11    27 |    10    10    22 |
esa | esa 2976 |     5     3    13 |     7    11    25 |     7     5    17 |
gfz | gfz 2961 |     4     4    12 |     7    12    23 |    10    10    20 |
grg | grg 2976 |     7     8    23 |     7     9    25 |     9     6    18 |
igr | igr 2976 |     5     3    12 |     6    11    23 |     7     5    17 |
igs | igs 2896 |     5     3    12 |     7    11    27 |     7     4    14 |
jpl | jpl 2963 |     6     4    15 |     6    12    26 |    10    10    21 |
mit | mit 2976 |     5     3    12 |     7    12    25 |    11    11    21 |


Table 6: Earth Orientation Parameters weekly summary.                          
                                                                              
        Weekly mean and standard deviation of Centre ERP, ERP rates and       
        LOD differences with respect to IGS combined values. See Table 7 for  
        the daily summaries.                                                  
                                                                              
        Xpole,Xrt: x pole and x pole rate                          
        Ypole,Yrt: y pole and y pole rate                       
        LOD      : Length Of Day                                               
                                                                              
        AC LOD BIAS    : 10-day mean LOD bias with respect to Bulletin A     
        AC LOD BIAS RMS: RMS of AC LOD BIAS                              
                                                                              
        FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
              for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 6.1731   GPS week: 1731   MJD: 56361.500-56367.500

                                                         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 |      -8     -11     -45     -21     -3 |      11     16
            |      23      29      79     102      6 |       2
emr   uuuuu |       3      55    -120     130     -7 |      43     46
            |      16      50     166      69     13 |       4
esa   uuuuu |      -1       1     -66     -37      4 |      14     18
            |      13       8      60      42      3 |       2
gfz   uuuuu |      32       9     130      11     -5 |       2     10
            |      19      21      66      96      3 |       3
grg   uuuux |      27      14      27      48    -10 |       5     19
            |      19      11      36      48     17 |       4
igr   xxxxx |     -58      21       8      33      3 |      -2     10
            |      15      13      71      88      4 |       2
irf   xxxxx |       8      -7      20       2      2 |      -1     11
            |       7      10      17      24      3 |       2
jpl   uuuuu |     -15     -25      70      92      0 |      43     45
            |      20      28      55      77      8 |       2
mit   uuuuu |      29     -24     -31       6      0 |      11     16
            |      19      19      49      74      4 |       3
ngs   uuuuu |     -61       1      94     -64      2 |       4      9
            |      37      48      65     189      4 |       1
sio   xxxxx |      58      26    -303    -156    -21 |      73     75
            |      61      21      44      58      8 |       7


Table 7.1731.0   GPS week: 1731   Day: 0   MJD: 56361.500

                                                         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 |     -28      32     -20    -143     -4 |      13     15
emr   uuuuu |      -6      60    -151      35      5 |      48     49
esa   uuuuu |       6      -2      11    -111     -2 |      16     18
gfz   uuuuu |      17     -15      27     -86     -3 |       6      9
grg   uuuux |      58      19     -35     139      9 |       0     23
igr   xxxxx |     -59      20      17     186      6 |      -3      7
irf   xxxxx |      13       1       2     -12     -3 |       2     11
jpl   uuuuu |     -30     -19      57      18      1 |      44     46
mit   uuuuu |      55      -5     -93      49     -5 |      15     19
ngs   uuuuu |     -65     -56     163     326      3 |       4      7
sio   xxxxx |      13      52    -286    -157    -32 |      82     82

Table 7.1731.1   GPS week: 1731   Day: 1   MJD: 56362.500

                                                         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 |     -28     -50     -75    -107    -14 |      13     15
emr   uuuuu |      25      76     -90     127     -9 |      48     50
esa   uuuuu |     -10      10     -62     -61      1 |      15     17
gfz   uuuuu |       0       0     199     -50     -6 |       5      9
grg   uuuux |      29      17      43      -3     11 |       2     23
igr   xxxxx |     -42       1     160     110      1 |      -2      7
irf   xxxxx |      13       7       9      30      0 |       1     11
jpl   uuuuu |      18       6     107     133      7 |      44     46
mit   uuuuu |      52       0     -70     113     -1 |      14     19
ngs   uuuuu |     -59     -31      84       4      7 |       4      7
sio   xxxxx |      13      25    -321     -59    -28 |      80     81

Table 7.1731.2   GPS week: 1731   Day: 2   MJD: 56363.500

                                                         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 |     -26     -32     104    -118     -7 |       9     15
emr   uuuuu |      17     127    -287     142    -31 |      45     47
esa   uuuuu |     -12       8     -89     -49      4 |      12     14
gfz   uuuuu |      31       4     177     152     -9 |       1      9
grg   uuuux |      22      10      20      61     -8 |       2     23
igr   xxxxx |     -45      39     -14      47      1 |      -5      8
irf   xxxxx |       6      -1      30      32     -1 |      -3     10
jpl   uuuuu |     -19      -3      40     239     -1 |      41     42
mit   uuuuu |      26     -16     -25      44     -5 |      11     15
ngs   uuuuu |     -25     -39      22    -231      3 |       2      5
sio   xxxxx |      65      -1    -233    -114    -27 |      75     77

Table 7.1731.3   GPS week: 1731   Day: 3   MJD: 56364.500

                                                         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     -26    -114      29      2 |       8     14
emr   uuuuu |       3      99    -345     156    -14 |      41     44
esa   uuuuu |       1       2     -47     -19      7 |      12     15
gfz   uuuuu |      31      17     160      96     -5 |       0      9
grg   uuuux |      27       6      71       2    -16 |       8     16
igr   xxxxx |     -64      25     -11     -10      5 |      -4      8
irf   xxxxx |      -3     -16      38     -16      3 |      -4      9
jpl   uuuuu |     -33     -23      49      75      9 |      40     41
mit   uuuuu |       6     -43      10     -73      0 |       9     13
ngs   uuuuu |     -47      11      79    -134      1 |       2      6
sio   xxxxx |     -21      -1    -285    -220    -22 |      72     75

Table 7.1731.4   GPS week: 1731   Day: 4   MJD: 56365.500

                                                         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      16    -112      16      3 |      12     19
emr   uuuuu |      -1       6    -110     232     -4 |      43     46
esa   uuuuu |      -4      -3     -92     -23      7 |      16     22
gfz   uuuuu |      38       5     165      83     -3 |       3     12
grg   uuuux |      40      -3      38      29     -8 |      10     17
igr   xxxxx |     -69      33     -57     -34      5 |       0     12
irf   xxxxx |       2     -22       5       5      3 |       0     13
jpl   uuuuu |     -17     -77      20      87      6 |      44     46
mit   uuuuu |       8     -50     -21     -20      1 |      12     17
ngs   uuuuu |     -46      77     202    -200     -1 |       6     12
sio   xxxxx |      68      24    -376    -183    -17 |      72     75

Table 7.1731.5   GPS week: 1731   Day: 5   MJD: 56366.500

                                                         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 |     -11       0     -95     126     -2 |      11     18
emr   uuuuu |       6      28      -9      47      7 |      41     44
esa   uuuuu |     -11     -15     -11      20      3 |      16     21
gfz   uuuuu |      58       2     133     -50     -6 |       1     12
grg   uuuux |      14      32       2      64    -18 |       8     17
igr   xxxxx |     -48      10      -4     -65      7 |       0     12
irf   xxxxx |       4     -11      13     -34      6 |      -1     13
jpl   uuuuu |     -32     -14      37      11     -6 |      45     47
mit   uuuuu |      25     -36     -64     -99      7 |      10     16
ngs   uuuuu |     -45      47      41     -84      3 |       5     12
sio   xxxxx |     119      36    -311    -220    -14 |      68     71

Table 7.1731.6   GPS week: 1731   Day: 6   MJD: 56367.500

                                                         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 |      34     -19      -5      51      2 |       7     16
emr   uuuuu |     -24      -9     149     169     -2 |      38     40
esa   uuuuu |      24       6    -172     -18      6 |      14     19
gfz   uuuuu |      47      53      51     -71      1 |      -3     12
grg   uuuux |      -3      19      53      44    -39 |       6     18
igr   xxxxx |     -83      17     -32      -5     -2 |      -1     12
irf   xxxxx |      17      -9      43      10      4 |      -3     12
jpl   uuuuu |       7     -45     179      81    -14 |      43     45
mit   uuuuu |      29     -20      46      29      4 |       8     14
ngs   uuuuu |    -141       0      64    -132     -6 |       4     12
sio   xxxxx |     147      44    -308    -137    -10 |      62     65



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