[IGSREPORT-24094] Wk 1872 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri Dec 11 12:26:40 PST 2015


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1872   (Nov 22, 2015 - Nov 28, 2015)

Contacts: igs.acc 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:

igs1872[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1872[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1872[0-6].cls  IGS GPS clock combination summary report.
igs18727.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs18727.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   | FLRS KOUC FLRS KOUC MOBS NRMD
                0  |  ESA   | SOFI SOFI
                0  |  GFZ   | NKLG NRMD TONG NKLG NOVM TONG
                0  |  GRG   | 6 6 MCM4 RABT SCOR MANA MCM4 RABT SCOR
                1  |  ESA   | TWTF
                1  |  GFZ   | TONG TONG TWTF
                1  |  GRG   | 3 13 13 MCM4 NRMD TWTF ULAB MCM4 NRMD POHN ULAB
                1  |  JPL   | TONG
                1  |  MIT   | TWTF
                2  |  COD   | MCM4 TWTF MCM4 TWTF
                2  |  ESA   | 10 10
                2  |  GFZ   | CGGN CHTI MDVJ TONG CGGN CHTI GLPS MDVJ TONG
                2  |  GRG   | 3 3 NRMD SCOR TWTF NRMD POHN SCOR TWTF
                2  |  JPL   | TWTF
                3  |  COD   | REUN
                3  |  ESA   | TWTF REUN
                3  |  GFZ   | MAL2 TONG HOLM MAL2 TONG
                3  |  GRG   | 6 MAL2 MCM4 TWTF MAL2 MCM4 POHN
                3  |  JPL   | TUVA
                4  |  COD   | REUN REUN
                4  |  ESA   | TWTF SAVO TONG TWTF
                4  |  GFZ   | TONG TWTF NOVM NRMD TWTF UFPR
                4  |  GRG   | MCM4 TRO1 MCM4 POHN TONG TRO1
                5  |  ESA   | 10 10
                5  |  GFZ   | TONG NOVM TONG
                5  |  GRG   | RABT DARW POHN RABT
                5  |  MIT   | RABT RABT
                6  |  ESA   | MAL2 MAL2
                6  |  GFZ   | TONG NOVM TONG
                6  |  GRG   | 6 6 ALRT ARTU MAL2 MCM4 NRMD SYOG ALRT ARTU DARW
                6  |  GRG   | MAL2 MANA MCM4 NRMD POHN SYOG
                6  |  MIT   | HOB2 KIRI

 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. 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 |  4 |    |  4 |    |    |    |    |
           PRN G10 |  4 |    |    |    |    |    |    |

 7. 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.

 8. 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 |     .1   -2.6   -1.5     -43    -16     25     .70
       EMR  |   0 |     .6   -1.9   13.8      11      4     38     .32
       ESA  |   0 |    -.2    -.5   -1.2      -9    -13     38     .51
       GFZ  |   0 |     .7    -.8   -2.3     -69   -111     -8     .41
       GRG  |   0 |    -.5    5.7  -15.4     -31    -55     15     .61
       JPL  |   0 |    1.4    -.4    2.3     -36     -7     27     .50
       MIT  |   0 |    3.5    -.4   -3.2      22     15    -21     .69
       NGS  |   0 |     .0    6.2    5.4      11    -21     -2     .62
       SIO  |   0 |   -4.3    2.9    -.6       4    -30     19     .33

       COD  |   1 |    -.9   -2.4   -2.8     -49     -7     22     .73
       EMR  |   1 |     .7    3.1   11.1       1     -6     45     .31
       ESA  |   1 |     .1     .1    -.7     -34     11     -6     .39
       GFZ  |   1 |    -.1    -.7   -1.5     -39   -108     16     .36
       GRG  |   1 |   -4.0    3.6   -4.8     -22    -31     16     .77
       JPL  |   1 |    1.5     .3    4.0      -9    -13     18     .07
       MIT  |   1 |    3.6    1.4   -4.7      35     11     -7     .94
       NGS  |   1 |   -5.0    1.4    2.2       9     -3    -33     .71
       SIO  |   1 |    -.7    7.4   -4.7      10    -22     19     .35

       COD  |   2 |    -.3   -1.9   -2.2     -60      1     17     .62
       EMR  |   2 |    2.8   -1.7   17.4      29      0     51     .32
       ESA  |   2 |     .1    -.4   -1.2     -11    -12     40     .47
       GFZ  |   2 |    1.0    -.9   -1.9     -45   -119      5     .55
       GRG  |   2 |   -1.5     .7   -7.7       9    -44      6     .78
       JPL  |   2 |     .9   -1.2    9.8     -59     15     49     .52
       MIT  |   2 |    5.7    3.2   -1.8      64     15    -38     .82
       NGS  |   2 |   -4.7   -1.2   12.2     -36     -6    -59     .55
       SIO  |   2 |     .4    4.5   -3.4       9    -12     26     .61

       COD  |   3 |     .3    -.7   -1.0     -32    -14     -5     .60
       EMR  |   3 |    6.5   -1.5    5.2      17      1     10     .32
       ESA  |   3 |    -.5    -.6     .4     -36    -17     15     .44
       GFZ  |   3 |     .9   -1.0   -2.1     -45   -125    -14     .51
       GRG  |   3 |   13.1    2.1  -15.1     -41    -56     25     .28
       JPL  |   3 |    8.7   -5.2     .1     -41     47     10     .50
       MIT  |   3 |    7.5     .4   -6.1      31     13    -35     .84
       NGS  |   3 |    3.8   -1.9    7.6       1    -32     -5     .83
       SIO  |   3 |    1.5    3.3   -4.0      -7    -17     38     .62

       COD  |   4 |     .3    -.9    -.3     -43      6     -8     .59
       EMR  |   4 |    5.2   -3.6    5.4      -5     -6     31     .62
       ESA  |   4 |    -.5   -1.1    -.7     -21    -20     19     .59
       GFZ  |   4 |     .6    -.6    -.9     -57   -115      3     .53
       GRG  |   4 |    5.5    3.8  -17.7     -52    -58     33     .27
       JPL  |   4 |    6.4   -5.0   -3.0     -30     12     36     .50
       MIT  |   4 |    4.0    1.9   -4.2      43      1     -3     .62
       NGS  |   4 |    2.6    5.0   -1.6      58    -14      9     .67
       SIO  |   4 |   -1.6   -3.2   -9.0      -8    -10      2     .50

       COD  |   5 |    -.5    -.5   -1.0     -16     20      6     .65
       EMR  |   5 |     .1   -2.5    8.3      -1     -8     43     .48
       ESA  |   5 |     .2    -.9   -1.0     -27     -6     29     .65
       GFZ  |   5 |     .1    -.5    -.8     -60    -86    -18     .33
       GRG  |   5 |    4.0   -1.3  -18.3     -66    -77     19     .81
       JPL  |   5 |    5.9   -6.8    -.4     -34     44     42     .62
       MIT  |   5 |    -.3     .5   -5.7      43     10    -27     .61
       NGS  |   5 |   -1.2    3.8   -4.0      51      5    -20     .54
       SIO  |   5 |   -2.3   -3.3    2.0      -5     -7      4     .53

       COD  |   6 |     .1   -1.0   -1.7     -41     17     -9     .47
       EMR  |   6 |    3.1   -1.8   10.4      24     -5     35     .16
       ESA  |   6 |    -.6     .1   -1.0     -12    -31     40     .32
       GFZ  |   6 |     .8     .1   -1.6     -38    -92    -27     .27
       GRG  |   6 |     .8    -.2   -9.5     -59    -78     63     .07
       JPL  |   6 |    1.7    3.2    2.5      -2      2     10     .53
       MIT  |   6 |    1.6    -.3   -6.4      34     18    -18     .53
       NGS  |   6 |    1.5    2.0    5.9       0    -21     -7     .47
       SIO  |   6 |    1.3    -.2    4.2      -9    -10    -14     .30


 9. 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.

10. 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 1.1872.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1872.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 2.1872.[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 3.1872.[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 5.1872.0-6). 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 1872 summary.                       (Nov 22, 2015 - Nov 28, 2015)

Table 1.1872.a   GPS week: 1872   MJD: 57348.000-57354.000

         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  246|    1     0     5   -13     1     2  -.01   11   11 |    -673    -473     12    123
        |    0     0     2    21     6     6   .03           |     149     254
emr   79|    0    -2     4   -21   -22     4   .20   12   12 |    6459     -13     20    126
        |    0     1     1    15    19    12   .02           |     621     683
esa  150|    0     1     5    -4   -22     4  -.40   12   12 |    -886    1004      7    142
        |    0     0     1    52    31    18   .02           |     963    1175
gfz  196|   -2     0    -6    -6   -16    19   .07    9    9 |    -199     128     12    109
        |    0     0     1    11    19    10   .03           |     406     541
grg  114|    0     0    -6   -11    50     8   .06   15   13 |     -90     103     26    201
        |    1     0     2    23    36    24   .06           |     171     381
igr  n/a|    0     0     0   -17    12     3  -.01    4    4 |    5474    -309     14     66
        |    0     0     1    16    17    15   .02           |    1239     864
jpl   80|    2     0     5    -7    18    -3   .21   10   10 |    6501     -37     15    128
        |    1     1     0    15    22    19   .04           |     612     686
mit  347|    0     0    -7     9   -16   -14  -.18   12   11 |     -11    -113     47    397
        |    0     0     0    25    26    19   .03           |     228     480
ngs  213|   -1     1     0    26    14    -8   .02    9    8 |    -683    -486   1024   2485
        |    0     1     2    18    14    13   .03           |     153     269
sio  290|    0     0     0    27    -7   -12  -.08   14   13 |     ---     ---    ---    ---
        |    0     0     1    23    34    20   .03           |     ---     ---


Table 1.1872.b   GPS week : 1872   MJD: 57348.000-57354.000   

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

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    4    4    3    3    3    3    3 |
   2  |    4    5    4    5    4    4    4 |
   3  |    4    4    3    3    3    4    3 |
   5  |    4    5    4    4    4    5    5 |
   6  |    3    3    3    4    3    4    3 |
   7  |    4    5    4    4    4    4    4 |
   8  |    5    5    6    4    4    4    4 |
   9  |    4    4    4    4    3    4    4 |
  10  |   38   23   20   22   24   19   38 |
  11  |    4    4    4    4    4    4    4 |
  12  |    5    5    5    5    5    5    5 |
  13  |    3    4    4    3    3    4    4 |
  14  |    4    4    3    3    4    4    4 |
  15  |    5    5    4    4    4    4    5 |
  16  |    4    5    5    5    4    5    5 |
  17  |    4    4    4    4    4    4    4 |
  18  |    5    4    5    5    5    5    5 |
  19  |    4    4    5    4    4    4    4 |
  20  |    4    4    4    4    4    4    4 |
  21  |    4    4    4    4    4    4    4 |
  22  |    4    4    4    4    4    4    4 |
  23  |    4    5    5    5    5    5    5 |
  24  |    4    4    4    4    4    4    4 |
  25  |    4    4    4    3    4    4    4 |
  26  |    3    4    3    4    4    4    4 |
  27  |    4    4    5    4    4    4    4 |
  28  |    4    4    4    4    4    4    4 |
  29  |    5    4    5    5    5    5    5 |
  30  |    3    4    3    3    3    3    3 |
  31  |    4    4    4    4    4    4    4 |
  32  |    4    4    3    4    4    4    4 |



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         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 2.1872.0   GPS week: 1872   Day: 0   MJD: 57348.000                            

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  244|    1     0     5     2     4     2   .02   11   11 |    -745    -170     12    125
emr   80|    0    -2     5    -5   -33     6   .22   12   12 |    6193     477     20    118
esa  150|    0     1     3    -1    -9    20  -.39   12   12 |   -1227    1576      7    120
gfz  197|   -2    -1    -5   -18   -15     1   .10   10    9 |    -263     223     10     82
grg  115|    1     0    -8   -10    12    -1   .06   14   14 |    -159     236     27    161
igr  n/a|    0     0     0   -13    31   -16  -.00    4    4 |    6678    -111     13     58
jpl   80|    1     0     5   -18    18    26   .25   10   10 |    6255     435     15    124
mit  348|    0    -1    -7     0     6   -30  -.21   14   12 |     -80     -20     42    355
ngs  214|    0     1    -1    21    16    -1  -.04    8    7 |    -745    -174    716   1999
sio  291|    0     0     0    35   -27   -20  -.09   13   13 |     ---     ---    ---    ---

Table 2.1872.1   GPS week: 1872   Day: 1   MJD: 57349.000                            

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  244|    2    -1     4    16     0     6  -.01   12   12 |    -799    -280     16    118
emr   80|    0     0     4   -24   -15     7   .21   11   11 |    6802   -1231     18    110
esa  150|    1     1     4   -19     0    17  -.38   13   13 |    -267    -148      8    114
gfz  195|   -1    -1    -6     8    -6    20   .07    9    9 |      94    -836     13    113
grg  114|    1     0    -4     0    44   -18   .01   14   13 |      88    -493     27    206
igr  n/a|    0     0     0     0    30    -8  -.03    4    4 |    6604   -1696     14     81
jpl   80|    0     0     6     6    20   -30   .21   10   10 |    6839   -1268     16    133
mit  348|    0     0    -9   -19   -49     0  -.22   13   11 |     266    -733     46    365
ngs  212|   -1     2     0    11    28    -1   .02    9    8 |    -887    -222   1042   2411
sio  291|    0    -1     0    25   -46    -4  -.06   15   13 |     ---     ---    ---    ---

Table 2.1872.2   GPS week: 1872   Day: 2   MJD: 57350.000                            

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  249|    0     0     3   -35     2     1  -.05   11   11 |    -553    -531     12    115
emr   80|    0    -4     7   -14   -54    16   .22   12   12 |    5938     815     18    111
esa  150|    1     1     4   -19   -10    14  -.37   12   12 |   -1611    1792      7    118
gfz  194|   -1     0    -7    12   -32    35   .02    9    9 |    -570     770     12     90
grg  115|    1     0    -5    23    92    -8  -.04   14   14 |    -191     293     27    195
igr  n/a|    0     0    -1   -28    12   -12   .00    4    4 |    5152    1122     14     59
jpl   80|    2     0     6   -28   -22    -4   .28   10   10 |    6014     786     16    137
mit  348|    0     0    -8    33     2   -43  -.17   13   11 |    -181     160     54    396
ngs  215|   -2     1     0     4    36   -14  -.00    8    7 |    -596    -505   1086   2609
sio  295|    0    -1    -2    41     4    17  -.03   16   14 |     ---     ---    ---    ---

Table 2.1872.3   GPS week: 1872   Day: 3   MJD: 57351.000                            

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  247|    1     0     2   -16    -3    -9  -.02   10   11 |    -704    -481      9    119
emr   80|    0    -1     2   -43   -32    19   .21   11   11 |    6583      42     17    112
esa  150|    1     1     5   -55   -20     7  -.40   12   12 |      97    -251      8    161
gfz  195|   -2    -1    -6   -12   -37    16   .05    9    9 |     319     102     11    162
grg  116|    0     0    -7     6    94    14   .11   15   14 |     140    -197     27    226
igr  n/a|    0     0     0   -44     3    10  -.02    4    4 |    6107    -517     14     49
jpl   80|    1     0     5   -15    27     3   .20   10   10 |    6615      50     15    123
mit  348|    1     0    -8    41     2   -22  -.16   12   10 |     -15      21     44    389
ngs  213|   -1     0     4    44     7   -25   .02    9    7 |    -724    -445    949   2359
sio  292|    1     0     0    47   -13   -10  -.11   14   13 |     ---     ---    ---    ---

Table 2.1872.4   GPS week: 1872   Day: 4   MJD: 57352.000                            

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  243|    0     0     9   -38     2    -1  -.06   11   10 |    -389    -975     11    126
emr   79|    0    -2     2   -30     6    -2   .19   10   10 |    7489     272     20    160
esa  150|    0     0     5   109   -92   -34  -.42   13   13 |     312     -33      8    219
gfz  196|   -2     0    -5    -9    15    12   .06   10    9 |     199    -294     13    128
grg  113|    0     0   -11   -45    66    12   .09   15   13 |    -173     583     25    222
igr  n/a|    0     0     2   -24    20    19  -.03    5    5 |    6037    -527     15     69
jpl   80|    3    -1     5   -14    26   -23   .17   10   10 |    7516     257     15    139
mit  347|    0     0    -7   -18    -7    14  -.19   10    9 |    -107     406     48    391
ngs  215|    0     2    -1    57    -4    14   .05    8    7 |    -396    -998   1206   2456
sio  295|    1     0     1   -21   -10   -19  -.07   13   12 |     ---     ---    ---    ---

Table 2.1872.5   GPS week: 1872   Day: 5   MJD: 57353.000                            

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  248|    0     0     6     5    -6     7   .02   10   10 |    -745    -474     12    131
emr   80|    0    -2     3   -28   -18   -18   .17   12   12 |    6622    -558     24    155
esa  150|    0     0     7   -27   -14    -3  -.41   12   12 |   -2315    2818      7    144
gfz  198|   -2     0    -3   -13   -32    21   .07    9    8 |    -451     477     11     95
grg  110|    0     0    -6   -29    41     0   .04   14   13 |       2    -113     27    210
igr  n/a|    0     0     3   -10   -17    18  -.02    5    5 |    4389    -648     14     65
jpl   80|    3     0     6     4    50    14   .21   11   11 |    6651    -591     16    126
mit  348|    1     0    -6    32   -11   -13  -.18   11   11 |     328    -837     48    499
ngs  214|   -1     0    -3    19    12    -6   .03    9    8 |    -692    -563   1021   2705
sio  287|    0     0    -1    31   -19     0  -.07   15   15 |     ---     ---    ---    ---

Table 2.1872.6   GPS week: 1872   Day: 6   MJD: 57354.000                            

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  247|    0     0     5   -29    12     6   .00   11   11 |    -778    -404     13    127
emr   80|    0    -2     3     0   -10     1   .18   12   12 |    5589      92     24    122
esa  150|    0     0     6   -18   -11     8  -.42   12   12 |   -1196    1279      6    119
gfz  197|   -1     0    -7    -8    -9    28   .10   10    9 |    -724     459     14     99
grg  117|   -1     0    -2   -22     1    58   .13   15   14 |    -340     415     27    189
igr  n/a|    0     0     0     1     7    12   .04    5    5 |    3353     208     16     85
jpl   80|    2     1     4    13    10    -8   .16   10   10 |    5623      68     17    117
mit  348|    0     0    -7     0   -59    -7  -.16   11   11 |    -291     209     48    390
ngs  213|    0     0     0    23     5   -21   .06    9    8 |    -741    -500   1149   2860
sio  283|    1     0    -1    34    63   -48  -.12   11   11 |     ---     ---    ---    ---

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

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

Table 3.1872.0   GPS week: 1872   Day: 0   MJD: 57348.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   21   14    9    8    4    7   13    5   13    4 |    45   56   42   50   51   46   49   47   45   46    46
   2  |   14    9   13   10   13    3    9   11    8   15    4 |    35   40   39   50   47   41   41   49   42   49    42
   3  |   11   20   13    7   10    3    6   12    7    8    4 |    34   43   28   31   34   31   38   29   31   33    32
   5  |    9   12   14   11   15    4   12   14    8   11    4 |    43   45   42   39   39   39   45   34   39   38    39
   6  |    9    8   14    6   11    3    9   11    6    7    3 |    42   45   42   48   52   44   46   54   46   49    46
   7  |   12   13   11   11   14    3   11   15    9   12    4 |    26   22   18   26   22   19   23   18   23   17    19
   8  |   16    9   12   13   17    5   10   14    8   14    4 |   160  161  161  165  164  161  160  166  160  163   161
   9E |    9   10   14    6   19    4    8   12    7    9    3 |    29   27   32   30   25   28   29   28   28   27    27
 X10  |   36  ---   40  ---  ---   40  ---  ---  ---  ---   38 |   145  ---  185  ---  ---  148  ---  ---  ---  ---   161
  11  |    6   12   16    8   16    4    8   15    5   13    3 |    57   59   56   62   65   58   58   64   57   57    58
  12  |   19   13   10   14   17    5   12   14   10   21    5 |    28   26   20   27   28   23   29   20   25   26    23
  13E |   10   13    9    7   15    3   10    8    6    9    3 |    31   35   30   33   31   30   33   28   30   32    30
  14E |   11   12    5    7   15    4    8   19    8   18    4 |    24   21   19   27   25   22   24   23   26   22    21
  15E |   10   20   10   11   15    5   15   13    9   11    4 |    41   44   41   41   39   39   40   39   37   41    39
  16  |    9   14    7   12   13    4   11   16    9   15    4 |    27   25   22   25   23   21   25   26   20   25    21
  17  |   14   12    8    9   16    3   15   12    8   12    4 |    39   38   33   39   42   36   38   42   36   43    37
  18  |   13   10   14   19   16    4    8   21   12   14    5 |    25   27   25   46   38   29   29   33   29   27    28
  19  |   10   12   10    9   16    4   13   14    6   11    4 |    24   26   18   26   26   21   23   24   21   21    21
  20  |    9    9   14    9   15    3    9   11    8   14    3 |    33   35   31   43   44   35   35   39   36   36    35
  21  |   10   12   13    9   13    5    9   17    8   19    4 |    38   38   38   46   45   40   40   46   41   43    40
  22  |    7    9   13    9   13    4    8   22    9   13    4 |    34   36   35   44   46   37   38   45   35   37    37
  23E |   12   10    7   12   21    4   13   13    9   12    4 |    27   26   22   30   25   23   27   25   27   27    24
  24  |    9   11   14    7   10    5   10    9    6   12    3 |    21   24   26   24   23   22   24   21   21   22    21
  25  |   10   10   15   11   11    6   10   12    7   12    3 |    24   27   28   25   25   24   27   21   24   25    23
  26  |    7   10   14    7    8    4    9   12    7   10    3 |    30   30   35   29   30   30   31   31   26   33    29
  27  |   10   12   16    9   14    4    9   14    7   18    4 |    55   52   52   54   57   52   53   58   51   58    53
  28  |   13    9   10   10   16    3   10   12    8   15    4 |    29   26   19   25   28   21   27   20   21   19    21
  29  |   17   12    7    9   18    4   13   14    8   16    4 |    33   31   25   33   32   29   30   32   29   36    29
  30  |    8    8   13    7   10    3    7    7    5    6    2 |    22   21   23   21   20   19   23   19   18   19    19
  31  |    9   10   11    9   14    5   10   14   10   12    3 |    26   27   20   28   29   22   28   21   23   25    23
  32  |   11   10   10    8   12    3    7   10    7   16    3 |    24   27   24   25   31   24   27   24   23   19    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   12   12   10   14    4   10   14    8   13      |T   40   38   39   39   39   39   38   37   35   37    39
 WRMS |   11   12   12    9   14    4   10   12    7   13      |NE  36   33   37   35   35   36   33   32   30   31    36
 MEDI |   10   11   13    9   14    4    9   13    8   12      |MD  31   30   30   31   31   30   30   29   29   32    29

Table 3.1872.1   GPS week: 1872   Day: 1   MJD: 57349.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   13   15    8   10    3    8   17   10   13    4 |    35   40   28   36   37   32   38   37   31   35    34
   2  |   16    9   14   11   14    4   10   11   12   18    4 |    30   33   29   37   31   30   31   36   32   33    31
   3  |    9    9   14    7   11    4    7   13    5   11    3 |    29   36   28   26   32   28   34   29   29   29    29
   5  |   15   12   14   11   14    4   11   12   13   15    4 |    35   34   30   25   25   27   34   25   29   28    27
   6  |   10    9   16    4   10    5    7   11    7    8    3 |    33   38   32   35   38   32   37   40   33   37    34
   7  |   17   13   14   10   13    3    9   15    9   12    4 |    27   26   18   22   22   18   24   19   25   15    20
   8  |   13   12   12   10   20    5   10   13   11   18    4 |    90   91   91   93  100   92   90   93   87   91    90
   9E |   12   11   15    7   14    4    8   12   10   12    4 |    28   28   32   29   23   27   27   28   28   27    26
 X10  |   35  ---   45  ---  ---   22  ---   41   35  ---   22 |    91  ---  111  ---  ---  104  ---   86  108  ---   100
  11  |    7   10   19    8   16    4    7   15   11   18    4 |    41   44   38   43   51   40   44   48   39   40    41
  12  |   18   13   12   12   18    7   12   12    9   24    5 |    26   26   21   31   25   23   26   18   24   25    22
  13E |    9   11    9    7   17    3   13    8    7    9    3 |    38   41   37   38   33   37   42   40   37   39    37
  14E |   11   10    6    7    9    4   10   12    9   13    3 |    21   19   17   25   20   20   19   21   25   18    18
  15E |   13   16    8    9   14    4   14   12   12   12    4 |    32   31   25   28   25   26   28   26   26   27    26
  16  |    8   14    8   13   12    4   13   18   13   20    4 |    25   23   18   24   24   20   24   22   21   21    19
  17  |   15   13    9    8   17    4   13   11    8   13    4 |    34   35   29   36   39   32   34   36   32   38    32
  18  |   10    8   14   13   13    5    8   17   10   15    4 |    24   25   23   36   25   24   26   21   26   23    23
  19  |   12   15   11    8   18    5   11   15    7   10    4 |    28   25   17   24   27   19   23   24   20   17    20
  20  |   10    9   13    8   15    5    8   10   10   14    3 |    30   32   28   32   28   28   31   32   30   30    29
  21  |    8   11   13   10   10    5    8   14    8   20    4 |    30   33   30   31   29   28   31   29   30   30    29
  22  |    5    8   13    8   11    4    8   18    9   13    3 |    27   28   26   31   29   25   28   29   26   26    26
  23E |   13   12    9   13   23    5   10   13   11   15    4 |    24   25   20   27   26   22   25   23   26   23    22
  24  |    7   11   15    8   11    5   11    7    9   16    3 |    26   26   29   28   23   25   26   25   26   22    24
  25  |    9   11   17    6    9    5    9    8    7   14    3 |    21   25   29   26   22   23   25   20   23   29    23
  26  |    8    7   14    9    8    4    8   11    9   12    3 |    25   27   28   27   24   24   28   23   24   27    24
  27  |   10   12   16    7   20    6   10   11    9   14    4 |    29   33   33   35   42   35   34   34   35   32    32
  28  |   13   10   12    8   15    3    9   12   10   11    4 |    28   27   19   23   29   21   27   19   22   18    21
  29  |   16    9    9   10   14    4   11   13   10   17    4 |    30   27   21   33   27   26   26   25   28   30    25
  30  |   18   10   16    9    9    5    9    9    7    8    4 |    27   23   25   20   20   19   25   19   22   21    20
  31  |    9    9   10    8   15    5    8   13    9   13    3 |    26   28   18   25   28   21   27   17   22   23    21
  32  |    9    9   10    8   12    2    7   10    7   18    3 |    23   25   23   23   22   21   22   22   22   20    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   12   11   13    9   14    4   10   13    9   15      |T   32   31   30   31   30   30   31   31   31   29    30
 WRMS |   12   11   13    9   13    4   10   11    8   13      |NE  31   29   29   28   28   28   29   29   30   26    28
 MEDI |   10   11   13    8   14    4    9   12    9   13      |MD  28   28   28   28   27   26   27   25   26   27    26

Table 3.1872.2   GPS week: 1872   Day: 2   MJD: 57350.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   12   14    6    9    5    8    9    5   12    3 |    38   43   36   39   36   38   43   40   37   38    38
   2  |   13   10   15   12   13    4    9   12    8   21    4 |    34   35   32   40   33   34   35   40   33   37    34
   3  |    7    7   13    6    8    4    7    7    6   12    2 |    26   33   26   23   23   25   33   26   26   27    26
   5  |    9   11   15   10   13    3   11   13    8   17    4 |    34   40   36   27   27   31   40   31   31   31    32
   6  |    8   11   15    7    9    4    7    9    6   12    3 |    43   43   40   42   41   41   43   47   42   42    42
   7  |   12   15   12    8   18    4   10   15    8   12    4 |    25   30   21   19   25   22   30   24   23   18    22
   8E |   18    9   12    9   20   10   12   25   12   25    5 |   155  154  157  156  155  154  154  156  152  159   155
   9E |    9   11   15    5   18    4   10    9    7   12    3 |    30   31   34   28   21   30   34   30   29   28    29
 X10  |   27   38   55  ---  ---   27  ---   43   37  ---   20 |   111   33  146  ---  ---  114  ---   53   79  ---   121
  11  |    9   13   16    7   18    4    8   10    7   14    4 |    46   50   46   48   50   47   49   52   45   45    47
  12  |   18   13   12   12   18    4   11   13    9   22    5 |    27   29   20   23   26   21   27   18   21   21    21
  13E |    8   13    9    6   16    3   11   10    7   12    3 |    33   36   29   31   29   29   36   29   28   31    30
  14E |    6   10    8    7   10    3    8   11    7   10    3 |    23   23   19   22   18   22   22   26   24   19    21
  15E |   12   17    6   11   14    5   14   12    9   14    4 |    35   39   32   32   28   30   36   33   27   32    31
  16  |   15   11    8   11   18    5   11   13    8   21    4 |    27   28   19   20   21   20   27   20   19   24    20
  17  |    9   16    8    7   16    4   15   12    8   14    4 |    40   38   32   37   34   36   39   37   35   45    36
  18  |   13   10   15   17   14    4   10   18    8   15    4 |    26   28   20   37   29   26   27   28   25   24    25
  19  |   12   20    8    8   18    4   12   15    6   14    4 |    27   31   19   24   23   23   26   28   22   24    23
  20  |   10    9   14    7   14    3    9    9    8   14    3 |    29   34   30   32   33   32   34   35   33   34    32
  21  |    7   11   16    8    9    4    9   13    7   20    4 |    33   34   32   33   33   32   34   35   30   32    32
  22  |    8    8   14    7   10    4    9   18    7   16    3 |    29   32   28   33   34   31   31   36   29   30    29
  23E |   15   13    8   11   14    5   11   14   13   16    4 |    33   37   27   30   30   29   35   32   32   29    30
  24  |   10   13   14    8   12    4   12    9    7   18    4 |    23   28   26   21   18   22   27   24   21   22    22
  25  |   11   14   15    6   12    4   12    9    7    9    3 |    23   30   27   21   23   24   27   22   23   24    23
  26  |   11    7   12    6   10    4    9    9    5   11    3 |    31   31   33   25   24   28   32   25   23   30    27
  27E |   10   16   14   10   17    6   11   19    9   22    4 |    52   52   53   49   50   50   54   56   48   58    51
  28  |   11   11    9    7   19    4   11   11    9   16    4 |    27   30   19   21   29   22   30   20   20   20    22
  29  |   20   15    7   11   14    3   12   15    9   14    4 |    33   34   25   28   22   27   31   28   26   28    27
  30  |    8   10   13    8   11    2    8    8    6    9    3 |    24   28   28   20   23   24   30   23   23   26    24
  31  |    9    9   11    8   16    4    8   11   10   14    3 |    24   28   18   23   28   22   28   19   20   22    21
  32  |    7    7   11    8   13    4    7   10    8   17    3 |    20   23   21   20   18   19   24   22   20   17    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   12   12    9   14    4   10   13    8   16      |T   37   37   36   33   32   35   37   35   33   33    35
 WRMS |   11   12   12    9   14    4   10   11    7   14      |NE  33   32   32   28   28   31   32   30   29   28    31
 MEDI |   10   11   13    8   14    4   10   12    8   14      |MD  30   33   28   28   28   29   32   29   27   28    29

Table 3.1872.3   GPS week: 1872   Day: 3   MJD: 57351.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7    8   14    6   10    5    8    9    5   11    3 |    42   46   38   44   42   41   47   44   40   40    42
   2  |   13   11   13   14   12    6    8   12   13   19    4 |    33   34   30   40   35   33   32   37   26   37    32
   3  |   10    7   14    7   13    3    6    8    6   10    3 |    28   34   26   24   31   27   33   28   29   27    28
   5  |    8   11   14   12   12    4   11   15   11   14    4 |    43   45   44   37   36   41   47   37   44   39    40
   6  |    7    9   14    6   10    4    8   11    9   12    3 |    38   39   33   39   40   35   37   41   31   39    36
   7  |   11   12   13    9   10    5    9   16   10   11    4 |    23   26   20   20   23   21   25   21   25   19    21
   8E |   10    9   14    9   20    7   10   14    7   11    4 |   107  109  109  109  105  108  107  108  104  106   107
   9E |    8   11   14    6   20    4   10   11    6   10    3 |    28   29   32   26   28   28   28   28   26   29    27
 X10  |   36  ---   39  ---  ---   10  ---   40   38  ---   22 |   119  ---  150  ---  ---  137  ---   77  104  ---   132
  11  |    7   10   17    7   18    6    8    9    7   11    3 |    53   57   50   58   59   53   57   56   50   49    53
  12  |   17   14    9   12   15    6   10   13   10   19    4 |    29   31   22   27   26   26   29   21   27   22    25
  13E |    7   10    7    5   12    4    7    7    6    9    2 |    35   39   34   34   37   36   39   35   35   36    36
  14E |   10   10    6    7   14    3    7   11    8   10    3 |    21   23   17   21   19   20   19   22   21   16    19
  15E |   10   15    6   11   12    5   15   12    9   10    4 |    43   46   42   41   42   42   46   42   43   45    43
  16  |   14   16    9   11   17    5   13   18    9   19    5 |    29   33   24   25   22   24   29   25   22   23    23
  17  |    7   16    7    9   18    3   15   11    8   16    4 |    45   47   41   47   46   43   47   45   40   49    44
  18  |   10    8   13   16   16    4    8   14   10   17    4 |    27   30   26   37   31   28   27   28   26   24    27
  19  |    9   13    9    7   19    4   13   14    6    9    4 |    26   28   18   25   30   22   26   26   20   22    23
  20  |    8    9   12    9   14    4    8   10    8   14    3 |    28   35   28   34   35   31   32   35   30   35    31
  21  |   10    8   14    9   15    3    8   10    9   16    3 |    32   36   31   35   38   32   34   36   30   35    33
  22  |    6    9   14    8   14    3    8   15   11   13    4 |    34   39   31   36   39   33   34   40   33   32    34
  23E |   12   17   10   13   21    4   13   10   11   15    4 |    30   30   27   31   30   27   30   29   30   31    28
  24  |    6   11   13    7   10    5   11    9    9   11    3 |    29   34   32   29   25   31   32   31   33   29    30
  25  |    7   10   15    7   11    5   10    7    7    9    3 |    24   32   30   25   25   27   29   23   27   27    26
  26  |   14   13   12    8   14    4    9    9    7   14    4 |    33   37   33   28   23   30   31   28   26   34    29
  27E |    9   14   15    6   22    6   10   12    8   15    4 |    33   31   31   31   23   28   30   31   26   31    29
  28  |   12   13    9    7   13    4   10   12   10   15    4 |    27   29   18   19   27   22   29   20   23   17    22
  29  |   19   12    6    9   20    4   12   16   10   16    4 |    34   34   23   29   28   28   29   29   25   28    27
  30  |    6   10   15    7    9    3    7    9    5    8    3 |    21   25   28   21   21   23   26   23   24   22    23
  31  |   13   10   12    8   15    5    8    9    9   13    3 |    29   32   24   26   27   25   29   24   27   29    26
  32  |   11    7   11    9   20    3    7   10    5   17    3 |    24   27   23   23   32   24   25   28   24   21    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   11   12    9   15    4   10   12    9   13      |T   37   37   35   34   34   36   35   35   34   33    36
 WRMS |   11   11   12    9   14    4   10   10    7   13      |NE  35   34   34   31   31   34   32   33   32   29    34
 MEDI |   10   10   13    8   14    4    9   11    9   13      |MD  30   34   30   29   30   28   30   29   27   29    29

Table 3.1872.4   GPS week: 1872   Day: 4   MJD: 57352.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6    7   13    9    8    4    8    6    5    9    2 |    32   39   31   37   43   35   40   36   39   37    36
   2  |   11    9   15   11   13    6   10   12   10   16    4 |    26   30   29   37   35   27   31   33   28   35    29
   3  |    7    5   14   10   14    5    7    6    6   12    3 |    29   35   27   29   33   28   37   30   30   29    30
   5  |   12   11   14   11   11    5   11   10    9   16    4 |    39   40   39   30   30   34   40   32   31   34    34
   6  |    6    7   15    5   11    5    8   12    7   12    3 |    31   34   28   34   41   29   32   35   31   33    32
   7  |    8   14   12   10   10    4   11   12    9   13    3 |    25   27   22   22   21   22   26   19   25   18    21
   8E |   13    8   17    8   18    4    9    7    7   14    3 |    68   74   72   72   68   69   69   71   72   72    71
   9E |    8   11   14    7   15    6    8    7    6   10    3 |    29   29   33   28   28   28   29   27   30   30    29
 X10  |   38  ---   45  ---  ---   23  ---   40   40  ---   23 |    92  ---  123  ---  ---  117  ---   59   70  ---   105
  11  |    7   10   18    8   17    5    8    6    7    9    3 |    44   54   46   50   57   47   50   50   49   50    49
  12  |   12   14   13   11   15    5   11   11   10   18    4 |    29   28   25   31   26   25   30   25   27   27    26
  13E |    8    8   10    7   13    4    9    8    8   11    3 |    31   31   28   27   31   29   30   28   30   28    29
  14E |   15   10    7    6   12    5    8   11    7    9    3 |    27   27   22   29   28   23   25   26   25   25    24
  15E |   14   14    7   13   18    5   12   10   10   12    4 |    50   52   48   48   51   48   49   53   50   52    49
  16  |   14   10   12   10   11    6   11   11   11   19    4 |    28   27   22   25   23   21   24   22   24   30    22
  17  |    8   14    8    9   18    4   14   16    7   12    4 |    48   51   45   49   54   47   50   50   50   49    48
  18  |   11    9   16   21   17    7    8   13    9   13    4 |    25   27   25   43   34   25   27   26   26   23    26
  19  |    8   10    8    9   17    4   13   10    6   10    3 |    25   28   21   26   31   22   27   24   23   24    24
  20  |    9    9   13   10   13    4    8   10    7   14    3 |    25   30   26   32   36   27   30   32   28   31    29
  21  |   10   10   17    9   16    5    9   14    9   18    4 |    29   32   30   33   38   28   31   32   29   29    30
  22  |    7    7   14    6   15    5    7   13    8   12    3 |    28   34   31   34   43   30   33   37   31   32    32
  23E |   15   11    8   12   19    5   14   11   12   15    4 |    28   26   23   27   25   24   28   27   29   26    24
  24  |    7   10   14    6   10    5    9    9    6   14    3 |    25   29   27   24   23   24   25   28   24   28    25
  25  |    9    9   18    8   11    4   10    6    8   11    3 |    26   29   30   28   25   25   27   23   29   29    27
  26  |   14   13   17    7   12    6   13    6    7   12    4 |    28   28   34   27   25   27   30   26   28   32    27
  27E |   10   13   15    5   18    4    9    7    7   16    4 |    28   29   30   28   30   26   28   27   27   32    27
  28  |    8   11    8    8   11    3   10    9    8   13    3 |    28   30   23   24   27   23   30   24   24   23    25
  29  |   19   17   10   10   17    5   12   13   11   15    5 |    34   34   26   35   36   31   31   33   35   31    31
  30  |    7   10   16    7    9    3    8    8    4    9    3 |    24   26   29   23   20   23   25   24   24   23    24
  31  |   16    8   11   11   11    5   10   12    9   11    4 |    30   27   19   26   24   23   24   21   24   24    23
  32  |   11    7   11    8   25    4    8    8    7   16    4 |    23   25   23   23   34   21   26   23   24   20    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   10   13   10   15    5   10   10    8   13      |T   33   33   33   32   34   32   32   32   32   31    33
 WRMS |   10   10   13    9   13    5   10    9    7   12      |NE  31   31   32   30   31   31   30   30   30   29    31
 MEDI |   10   10   14    9   13    5    9   10    8   12      |MD  28   29   28   29   31   27   30   28   29   29    29

Table 3.1872.5   GPS week: 1872   Day: 5   MJD: 57353.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    9    8   12    8   11    3    8    9    7   13    3 |    30   37   28   32   38   30   36   32   32   32    31
   2  |   10    9   13   10   12    5   12   11   13   19    4 |    23   26   25   31   27   23   24   28   27   27    25
   3  |    8    7   15    7   13    3    7   10    8   12    3 |    27   33   23   24   31   25   32   26   30   27    26
   5  |    8   13   13   10   12    5   14   13   11   18    4 |    33   37   34   29   28   31   39   29   30   28    30
   6  |    8    8   14    6   10    5    9   10   10   10    3 |    28   30   25   29   32   26   29   33   30   32    28
   7  |    8   15   10   10    9    3   14   11    9   12    4 |    24   26   18   25   24   22   26   19   25   19    21
   8E |   12   10   14   11   15    5   10    7    8   20    4 |    64   67   64   64   61   64   64   64   65   67    64
   9E |    8   11   13    6   18    4   10    6    9   13    3 |    30   29   32   29   28   28   28   27   29   27    27
 X10  |   27   28   45  ---  ---   23  ---   34   45  ---   18 |    90   43  106  ---  ---  101  ---   79  104  ---    93
  11  |    6   10   16   10   19    4    9   12    7   12    4 |    35   44   35   38   49   36   41   42   37   36    38
  12  |   13   14   11   12   15    5   14   15   11   19    4 |    21   25   16   26   22   20   25   17   22   21    19
  13E |    8   15   10    5   15    6   10    8    8   11    3 |    28   31   28   27   27   28   29   27   29   27    27
  14E |   13    9    7    6   11    6    8   11    8   11    3 |    24   21   18   24   25   20   21   23   23   18    20
  15  |    8   15    7    8   20    6   16   11    8   14    4 |    29   32   27   28   30   26   32   28   27   28    27
  16  |   14   15   11    8   15    5   11   13   13   20    4 |    25   26   18   24   21   20   24   17   22   26    19
  17E |   13   14    7    9   17    7   16    9    7   13    4 |    69   69   63   70   71   63   70   67   64   74    67
  18  |    9   10   15   21   15    6    8   15   10   14    5 |    26   27   20   42   27   25   24   22   25   24    24
  19  |    9   14    7    9   16    3   13   11    7   12    3 |    25   28   19   23   29   22   27   22   24   21    22
  20  |    8   10   12    8   11    5    9   10   10   13    3 |    27   27   23   25   27   23   26   27   30   25    25
  21  |    7   11   15    9   13    4    9   15    7   18    4 |    25   28   24   26   26   23   28   28   25   22    24
  22  |    8   10   14    7   12    4    8   10   10   15    3 |    31   35   30   31   34   28   31   29   31   31    30
  23E |   13   17    8   13   22    6   15   12   13   18    5 |    29   27   23   29   29   26   31   25   28   28    25
  24  |   10   11   15    7    9    7   12   12    9   18    4 |    23   23   25   24   20   22   23   23   24   21    21
  25  |    7    9   16    6   10    5   12    9    7   11    3 |    18   24   23   22   21   20   24   18   20   22    19
  26  |   12   13   14    8   12    4   10    7    8   14    3 |    27   30   26   25   23   24   27   22   25   30    25
  27E |    7   15   15    7   15    5   10   12   10   13    4 |    20   28   23   20   23   21   23   18   21   19    19
  28  |    9   11    8    8   11    3   13   12    6   13    3 |    27   28   20   23   27   22   29   20   22   19    22
  29  |   18   13    7   10   17    5   15   16    8   15    4 |    39   33   28   35   32   30   33   33   33   30    31
  30  |    8   12   15    8    5    3    9    6    5    7    3 |    22   22   25   21   21   21   24   21   22   22    21
  31  |   18   10   10    9   11    4    9   13    9   14    4 |    28   25   17   23   26   22   25   16   21   20    20
  32  |    7    8   11    7   16    3    9    9    6   15    3 |    19   23   20   21   29   20   23   21   25   20    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   12   12    9   14    5   11   11    9   15      |T   31   31   29   29   30   29   30   29   31   28    29
 WRMS |   10   12   12    8   13    5   11   11    8   15      |NE  28   29   27   26   27   27   27   26   29   25    27
 MEDI |    9   11   13    8   13    5   10   11    8   13      |MD  27   28   25   26   27   24   27   26   27   26    25

Table 3.1872.6   GPS week: 1872   Day: 6   MJD: 57354.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7    7   11    9    9    4    8    7    7    7    2 |    39   46   38   48   50   42   46   46   42   47    43
   2  |   11    9   15   10   14    5    9   11   11   14    4 |    33   36   33   44   44   37   36   42   38   42    37
   3  |    9    8   14    9   12    4    8    9    7    8    3 |    35   43   32   34   42   37   44   37   37   40    36
   5  |    8   13   13   11   12    6   14   14   14   17    4 |    48   48   48   42   42   41   48   39   42   40    42
   6  |    8    8   14    8   10    5   10    9    9    7    3 |    38   42   34   42   46   39   40   44   37   44    39
   7  |   10   15   10   12   11    5   11   11    9   10    4 |    29   28   23   28   26   24   28   19   29   26    24
   8E |   17   15   15    8   17    5    8    9    7    7    4 |   106  109  110  111  107  107  108  109  108  105   108
   9E |    7   18   14    8   17    4    8   10   12    9    4 |    37   35   41   37   39   36   38   35   38   39    36
 X10  |   35  ---   40  ---  ---   40  ---  ---  ---  ---   37 |   125  ---  168  ---  ---  130  ---  ---  ---  ---   142
  11  |    9   11   16   12   19    6   10   11    7    9    4 |    55   61   53   63   64   56   59   63   57   57    58
  12  |   20   14   10   12   14    4   12   14    9   15    4 |    32   27   22   29   27   25   28   22   28   29    24
  13E |    8   17    7    7   11    7   12    8    8   12    3 |    32   34   28   32   37   29   32   29   32   34    30
  14E |   16   11    6    6   21    5    9   10    6   14    4 |    26   22   19   25   29   22   21   22   25   23    21
  15  |   11   17    8   10   20    5   12   13    8   12    4 |    32   38   33   36   37   32   36   35   32   35    32
  16  |   18   11   11   15   16    4   10   10   12   15    4 |    31   26   21   29   27   24   26   19   26   26    22
  17E |    8   13    7    8   13    5   12   11    7   10    3 |    57   57   53   58   60   58   57   58   60   64    57
  18  |   10   10   14   19   13    4    9   14   11   13    4 |    29   33   28   50   39   34   34   31   33   32    32
  19  |    9   13    8    9   19    4   12   13    8    9    4 |    30   34   25   30   38   29   30   30   30   29    28
  20  |    9    9   13    8   12    5    9   11   10   11    3 |    29   36   26   38   42   34   35   38   37   36    34
  21  |    9   11   15    9   12    4   10   15    7   15    4 |    32   38   33   41   41   35   37   41   35   36    35
  22  |    7    8   13    7   18    4    9   12   10   10    3 |    37   41   36   45   52   40   42   45   39   40    40
  23E |   15   11    8   13   21    4   12   11   12   12    4 |    31   30   27   31   36   28   32   24   30   31    27
  24  |   10   14   15    7   11    4   10    9    7   11    3 |    23   22   27   27   21   21   21   19   23   21    21
  25  |   11   10   15    6   12    4    9   11    8   10    3 |    23   26   29   27   26   23   25   24   25   29    24
  26  |   11    8   15    8   15    5   10    6    9   12    3 |    32   31   33   29   28   29   33   28   31   34    29
  27E |   10   10   14    6   16    4   10   11    7   12    3 |    31   30   34   33   33   30   31   31   30   34    30
  28  |    8   12   10    6   12    4    9   13    7   12    3 |    28   32   24   26   30   25   29   25   26   24    25
  29E |   16   12   10   10   20    5   11   17   10   15    4 |    46   44   40   47   47   43   42   48   44   45    43
  30  |    8    9   14    8   10    4    8    6    7    7    3 |    25   24   29   25   23   24   27   24   27   26    24
  31  |   14   11    9    9   13    6   10   11    8    9    3 |    30   28   21   28   29   25   28   21   25   24    24
  32  |   10    8   11    8   22    3    9   17    7    9    4 |    23   28   23   25   38   24   29   28   27   25    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   12   12   10   15    5   10   11    9   11      |T   38   37   38   38   40   38   37   35   36   37    38
 WRMS |   11   12   12    9   14    5   10   11    8   11      |NE  36   34   36   35   36   36   34   32   33   33    36
 MEDI |   10   11   13    8   13    4   10   11    8   11      |MD  32   34   32   33   38   32   33   31   32   34    32



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 4.1872   GPS week: 1872   MJD: 57348.0-57354.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2966 |U    5     6    14 |U    7     8    25 |U    5     5    13 |
emr | emr 2907 |     8     7    17 |U    8     8    25 |     7     6    19 |
esa | esa 2976 |     7     6    16 |U    7     9    25 |     6     6    18 |
gfz | gfz 2879 |U    5     6    13 |U    7     8    26 |U    6     6    13 |
grg | grg 2879 |U    5     6    15 |U    7     9    29 |     7     8    15 |
igr | igr 2880 |     5     6    14 |     7     8    25 |     5     5    13 |
igs | igs 2898 |     5     6    14 |     6     8    25 |     6     5    13 |
jpl | jpl 2880 |     7     7    17 |U    7     8    26 |U    7     7    17 |
mit | mit 2948 |U    6     6    15 |U    8    10    32 |U    8     7    17 |



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 5.1872.0   GPS week: 1872   Day: 0   MJD: 57348.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2963 |     5     5    14 |     6     7    26 |     6     6    13 |
emr | emr 2880 |     9     8    17 |     6     9    29 |     6     7    16 |
esa | esa 2976 |     7     6    15 |     5     8    23 |     7     7    18 |
gfz | gfz 2880 |     5     5    13 |     6     7    29 |     7     7    13 |
grg | grg 2880 |     5     6    15 |     6     7    38 |     7     8    16 |
igr | igr 2880 |     6     6    15 |     6     7    29 |     6     7    13 |
igs | igs 2880 |     6     6    14 |     6     7    29 |     6     7    13 |
jpl | jpl 2880 |     7     5    17 |     6     7    28 |     7     8    14 |
mit | mit 2880 |     5     5    13 |     6     7    28 |     8     7    15 |

Table 5.1872.1   GPS week: 1872   Day: 1   MJD: 57349.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2971 |     5     7    17 |     7     7    20 |     5     6    13 |
emr | emr 2880 |     9     8    20 |     6     8    23 |     7     6    18 |
esa | esa 2976 |     7     7    17 |     8     8    23 |     6     6    17 |
gfz | gfz 2880 |     5     7    16 |     7     7    21 |     6     6    10 |
grg | grg 2879 |     5     6    17 |     7     8    21 |     8    11    12 |
igr | igr 2880 |     5     8    15 |     7     7    20 |     5     6    12 |
igs | igs 2880 |     6     9    17 |     7     7    21 |     5     6    12 |
jpl | jpl 2880 |     7     7    17 |     7     6    24 |     7     6    15 |
mit | mit 2976 |     5     7    16 |     8     7    21 |     6     7    11 |

Table 5.1872.2   GPS week: 1872   Day: 2   MJD: 57350.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2959 |     5     5    16 |     6     6    29 |     7     6    16 |
emr | emr 2976 |     7     4    17 |     6     7    27 |     8     6    18 |
esa | esa 2976 |     6     6    17 |     6     8    27 |     8     6    18 |
gfz | gfz 2880 |     5     5    14 |     6     8    29 |     7     7    15 |
grg | grg 2880 |     5     4    18 |     6     9    30 |     9     8    17 |
igr | igr 2880 |     5     5    15 |     6     7    28 |     7     6    15 |
igs | igs 2928 |     5     5    15 |     6     7    30 |     7     6    14 |
jpl | jpl 2880 |     6     7    19 |     6     7    31 |     8     8    16 |
mit | mit 2976 |     7     4    18 |     7     8    31 |    11     9    25 |

Table 5.1872.3   GPS week: 1872   Day: 3   MJD: 57351.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2974 |     5     5    14 |     6     7    22 |     5     4    13 |
emr | emr 2880 |     9     6    15 |     9     8    17 |     7     6    20 |
esa | esa 2976 |     8     5    16 |     7     9    20 |     6     5    17 |
gfz | gfz 2879 |     6     5    12 |     6     8    20 |     6     6    13 |
grg | grg 2880 |     6     5    14 |     7     9    23 |     7     7    14 |
igr | igr 2880 |     6     6    14 |     6     8    19 |     5     5    14 |
igs | igs 2880 |     6     5    12 |     6     8    20 |     6     5    13 |
jpl | jpl 2880 |     8     6    16 |     7     7    15 |     6     6    16 |
mit | mit 2976 |     6     6    11 |     6     8    17 |     7     6    14 |

Table 5.1872.4   GPS week: 1872   Day: 4   MJD: 57352.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2967 |     5     6    11 |     6     6    20 |     4     3    11 |
emr | emr 2879 |    10     7    14 |     6     7    21 |     6     5    19 |
esa | esa 2976 |     8     7    15 |     7     6    21 |     6     4    15 |
gfz | gfz 2880 |     6     6    10 |     7     6    20 |     5     4    12 |
grg | grg 2880 |     5     6    10 |     6     7    21 |     6     7    15 |
igr | igr 2880 |     6     7    12 |     6     6    19 |     5     3    12 |
igs | igs 2880 |     6     7    10 |     6     5    19 |     5     4    12 |
jpl | jpl 2880 |     7     8    13 |     6     5    19 |     6     6    18 |
mit | mit 2976 |     8     8    15 |    12    11    44 |     9     6    18 |

Table 5.1872.5   GPS week: 1872   Day: 5   MJD: 57353.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2968 |     4     6    14 |     8     9    27 |     5     5    12 |
emr | emr 2975 |     7     7    19 |    10    10    28 |     6     6    23 |
esa | esa 2976 |     6     7    18 |     8    11    30 |     6     6    20 |
gfz | gfz 2880 |     4     7    16 |     8    11    33 |     6     6    13 |
grg | grg 2880 |     4     7    16 |     8    11    33 |     7     8    18 |
igr | igr 2880 |     4     7    16 |     9    11    31 |     5     5    14 |
igs | igs 2964 |     4     7    16 |     7    10    28 |     5     6    14 |
jpl | jpl 2880 |     6     8    19 |     9    11    35 |     6     7    19 |
mit | mit 2976 |     5     7    21 |     8    11    35 |     9     6    20 |

Table 5.1872.6   GPS week: 1872   Day: 6   MJD: 57354.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2964 |     4     6    14 |     7    11    29 |     6     5    15 |
emr | emr 2880 |     8     8    19 |     9    11    30 |     8     5    23 |
esa | esa 2976 |     6     7    16 |     8    12    32 |     7     7    20 |
gfz | gfz 2879 |     4     5    13 |     8    11    31 |     6     5    14 |
grg | grg 2879 |     5     6    16 |     8    14    36 |     5     5    13 |
igr | igr 2880 |     4     7    14 |     8    11    31 |     6     5    14 |
igs | igs 2880 |     4     7    14 |     7    11    30 |     5     5    16 |
jpl | jpl 2880 |     6     7    17 |     8    11    30 |     8     7    23 |
mit | mit 2880 |     5     7    13 |     9    15    46 |     7     5    15 |


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

Table 6.1872   GPS week: 1872   MJD: 57348.500-57354.500

                                                         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       8      64       0     -4 |      16     24
            |      14      27      56      65      9 |       1
emr   uuuuu |      13      60    -199     -11    -10 |      30     37
            |      19      25     117      61      3 |       5
esa   uuuuu |      11      16      83      64     -6 |      16     24
            |       7      21      52      42      5 |       3
gfz   uuuuu |       3      -2       8    -112      1 |      22     28
            |      16      30     117      76      2 |       2
grg   uuuuu |     -20       1      63     -67      8 |      36     39
            |      27      17      87      65     11 |       2
igr   xxxxx |     -10      17      57       3      4 |      -5     18
            |      15      12      75      40      3 |       2
irf   xxxxx |      33     -25      19      47      0 |      -1     17
            |      11      11      39      11      2 |       2
jpl   uuuuu |      -3      20      -9     -41     -1 |      22     30
            |      27      20      53      74      7 |       4
mit   uuuuu |      36     -27     -11     149      0 |      23     28
            |      22      33     100      29      2 |       2
ngs   uuuuu |     -27     -44     158      23      6 |       7     18
            |      39      42     138      76      5 |       2
sio   uuuux |      10     -14    -269      10     -5 |      45     48
            |      23      17      53      45      6 |       2


Table 7.1872.0   GPS week: 1872   Day: 0   MJD: 57348.500

                                                         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 |       0     -14      75      29     10 |      18     25
emr   uuuuu |      16       9     -42      58    -15 |      39     43
esa   uuuuu |      15      -8      65      87      1 |      21     25
gfz   uuuuu |       2       0      -9    -126      2 |      26     30
grg   uuuuu |      -7      13      14     -69      6 |      35     37
igr   xxxxx |     -23      17      17     -50      3 |      -2     16
irf   xxxxx |      44     -14     -63      47     -4 |       3     15
jpl   uuuuu |     -13      15      43     -30     -4 |      29     37
mit   uuuuu |      30      29    -171     136     -2 |      27     30
ngs   uuuuu |     -29     -18     147     -18     -3 |      10     17
sio   uuuux |       8     -16    -312     -33     -2 |      48     50

Table 7.1872.1   GPS week: 1872   Day: 1   MJD: 57349.500

                                                         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 |       5     -36     117       5      6 |      16     25
emr   uuuuu |      12      64    -102      57     -9 |      33     40
esa   uuuuu |      19      20      16      62      0 |      17     24
gfz   uuuuu |       1     -27      34    -100      0 |      22     29
grg   uuuuu |     -15      13     -16     -35     -9 |      34     37
igr   xxxxx |     -17      14     -45     -25      2 |      -5     19
irf   xxxxx |      22     -27      51      57      1 |      -1     18
jpl   uuuuu |      -4      13     -81     -35    -10 |      24     35
mit   uuuuu |      30     -29     114     170      1 |      24     29
ngs   uuuuu |     -47       8      53     -38      3 |       6     19
sio   uuuux |      22     -36    -181     -34     -5 |      45     48

Table 7.1872.2   GPS week: 1872   Day: 2   MJD: 57350.500

                                                         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 |     -19      49     -21      49    -11 |      17     26
emr   uuuuu |      46      52    -214      21     -7 |      32     39
esa   uuuuu |       4       4     150      72     -1 |      17     24
gfz   uuuuu |      -1     -52     212    -178      2 |      22     29
grg   uuuuu |     -60     -21     147    -124      6 |      35     38
igr   xxxxx |     -22      21     138      10      7 |      -6     19
irf   xxxxx |      37     -19      44      58      0 |      -1     18
jpl   uuuuu |      41      42     -67    -198     13 |      22     33
mit   uuuuu |      69     -41     -44     193     -2 |      24     29
ngs   uuuuu |     -70      -8     -29     143      2 |       6     19
sio   uuuux |      30     -22    -225      27      3 |      45     48

Table 7.1872.3   GPS week: 1872   Day: 3   MJD: 57351.500

                                                         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       6      73      59     -8 |      15     23
emr   uuuuu |      25      68    -118     -62     -9 |      28     34
esa   uuuuu |       3      49      39      -6    -11 |      15     22
gfz   uuuuu |      18      -2      45    -140     -1 |      20     26
grg   uuuuu |     -56       5      99    -116     12 |      35     37
igr   xxxxx |     -12      41     122      50      4 |      -7     17
irf   xxxxx |      36     -18       2      40      0 |      -3     17
jpl   uuuuu |       7      22      60       5      2 |      18     26
mit   uuuuu |      61      -6    -101     113     -3 |      22     26
ngs   uuuuu |     -64     -90      83      86     10 |       4     16
sio   uuuux |      41     -15    -292      13     -5 |      43     46

Table 7.1872.4   GPS week: 1872   Day: 4   MJD: 57352.500

                                                         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      27     142    -116     -5 |      16     23
emr   uuuuu |     -13      81    -238     -68    -11 |      28     34
esa   uuuuu |      13      -6     143     101    -11 |      15     22
gfz   uuuuu |     -20      14    -114     -15     -2 |      21     27
grg   uuuuu |     -10      21     -65     -75      2 |      37     39
igr   xxxxx |      -9       9     128     -26      3 |      -7     17
irf   xxxxx |      20     -33      36      56      3 |      -2     16
jpl   uuuuu |      13      47      19      33      2 |      20     26
mit   uuuuu |      30     -46      62     160      4 |      22     26
ngs   uuuuu |      -5    -105     217     -49      9 |       6     16
sio   uuuux |     -21      18    -338      40     -1 |      44     47

Table 7.1872.5   GPS week: 1872   Day: 5   MJD: 57353.500

                                                         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 |     -17       5      48     -63    -12 |      15     24
emr   uuuuu |       8      82    -353       2    -10 |      25     34
esa   uuuuu |       7      35      58     109     -8 |      13     23
gfz   uuuuu |      30      38    -144     -13      2 |      20     27
grg   uuuuu |      -3      -5      96    -113     14 |      35     38
igr   xxxxx |      21       7      59       5      1 |      -7     17
irf   xxxxx |      46     -46      25      35      1 |      -3     17
jpl   uuuuu |     -47       8     -22     -25     -2 |      19     26
mit   uuuuu |      30     -73      44     154      2 |      21     26
ngs   uuuuu |     -12     -53     381     -38      8 |       5     16
sio   uuuux |       2     -25    -257     -30     -9 |      43     46

Table 7.1872.6   GPS week: 1872   Day: 6   MJD: 57354.500

                                                         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 |     -27      15      17      33     -7 |      17     26
emr   uuuuu |      -6      61    -326     -87     -8 |      26     35
esa   uuuuu |      18      16     109      21    -10 |      14     25
gfz   uuuuu |      -8      15      33    -214      3 |      23     31
grg   uuuuu |       8     -19     167      61     26 |      39     44
igr   xxxxx |      -6      10     -17      59     10 |      -4     19
irf   xxxxx |      24     -23      35      32     -1 |       0     20
jpl   uuuuu |     -16     -12     -17     -36     -5 |      21     29
mit   uuuuu |       2     -24      19     115     -1 |      24     30
ngs   uuuuu |      41     -42     253      71     10 |       9     21
sio   uuuux |     -14      -4    -281      86    -16 |      44     48



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