[IGSREPORT-25462] Wk 1961 IGS Final Orbits

acc acc at igs.org
Fri Aug 25 03:02:20 PDT 2017


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 1961   (Aug 06, 2017 - Aug 12, 2017)

Contacts: acc at igs.org


COMBINATION STRATEGY:
---------------------

Starting with GPS week 860, the IGS Final orbit combination is done directly
in the ITRF without any alignment to the Bulletin B EOP series.

Each centre satellite clock corrections are first transformed to a common 
reference. One of the following two methods can be used (the REMARKS section of
this report gives which method is used):
[1] For each centre, a clock offset and a drift are estimated with respect to
    the broadcast clock corrections using only non-SA satellites;
[2] A chosen reference centre is aligned to the broadcast clock corrections
    using all satellites. All other centres are then aligned to that reference
    centre. 
The offsets and drifts are used to align each centre satellite clock
corrections to GPS time. Ephemerides and clock corrections are then combined
as weighted averages computed over all centres. Each centre is given a
position weight and a clock weight. The position weights are computed from
each centre's absolute deviation to the unweighted average orbit after the
estimation of a 7-parameter Helmert transformation. The clock weights are
either computed from [1] the absolute deviation of the initial alignment to
broadcast clock for the non-SA satellites, or [2] from the absolute deviation
of centre's aligned clock corrections with respect to the unweighted mean.
Finally, a 7-parameter Helmert transformation and clock offset and drift are
estimated for each centre with respect to the combined solutions and parameters
and RMS of fit reported. All the above estimations are performed using the
L1-norm robust scheme.

  Each centre ephemerides are also evaluated individually and independently from
the orbit combination by using week long arcs. The Earth Orientation Parameters
(EOP) used in this evaluation are those submitted by the respective centres.
The IGS combined orbits/clocks and all centres providing both orbit and clock 
solutions are further evaluated by an independent point positioning (navigation)
program that uses both phase and pseudorange data at each SP3 epoch. This is
primarily intended for testing clock solution precision as well as the
orbit/clock consistency.

 Like the clock solutions broadcast in the navigation message, the combined
satellite clocks are corrected for the periodical relativistic correction (see
e.g. GPS interface Control document ICD-GPS-200, p.73):

                              -2*(X.V)/c  [distance unit],

where X and V are the inertial sv state and velocity vectors and c is the speed
of light. Also for compatibility with broadcast GPS time, the IGS clocks use
the linear combination of phase-smoothed P1 and P2 pseudorange data to remove
the 1st order ionospheric delay, with no other delay calibrations applied.


SOFTWARE:
---------

The weighted average software used was originally developed by T. Springer
and G. Beutler in 1993. The GPS long arc orbit analysis software used here for
individual centre ephemeris evaluation was developed by Beutler et al. at the
Astronomical Institute of the University of Bern (AIUB). For more details on
the orbit combination and complete references for both software see:

  Beutler G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS 
  Analysis Centers, Bulletin Geodesique, 69, pp 200-222.

  Kouba J., Mireault Y. and F. Lahaye, 1995, 1994 IGS Orbit/Clock Combination
  and Evaluation, Appendix I of the Analysis Coordinator Report, International
  GPS Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.

  Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1995 Annual Report, 
  pp. 45-76.

  Kouba J. and Y. Mireault, 1997, Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1996 Annual Report, 
  pp. 55-100.


PRODUCTS GENERATED:
-------------------

The resulting average ephemeris and clocks are output to daily files in SP3
format. The satellite accuracy codes displayed in the header are based on the
weighted RMS for each satellite over each daily arc. Note that each file
contains all the satellites that appear in any of the centre ephemeris files.
If a satellite or centre was excluded from combination, a note in the REMARKS
section of this report will identify the exclusion and the reason.

The resulting x and y earth rotation parameters (ERP) associated with the IGS
ephemeris files and their rates (xrt, yrt) are computed using a weighted average
of all available centres (as part of the separate SINEX combination since GPS
week 1051; weighted according to the orbit combination before that time). 

Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
Final IGS solutions. AC LOD biases with respect to Bulletin A are estimated
using Bulletin A most recent 10 days, i.e. up to 5 days prior to the last
non-predicted day of Bulletin A. AC LOD biases are removed and the new AC
bias-free LODs are used to compute a weighted IGS LOD which in turn is
integrated into IGS UT1-UTC. The starting UT1-UTC value is chosen as Bulletin
A fifth day prior to its last non-predicted day. Both IGS LOD and UT1-UTC
values are printed in the IGS Final erp file.



The Final Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:

igs1961[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1961[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1961[0-6].cls  IGS GPS clock combination summary report.
igs19617.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs19617.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   | BJCO HYDE MAL2 TIXI BJCO HYDE TIXI
                0  |  EMR   | HERS MAS1 SFER
                0  |  ESA   | DGAR KOUR LHAZ DGAR FAA1 KOUR LHAZ
                0  |  GFZ   | 13 PDEL SYOG PDEL SYOG
                0  |  GRG   | GLSV MAL2 SYOG FAA1 GLSV NKLG PDEL SYOG
                0  |  MIT   | AREG DGAR AREG DGAR PDEL
                1  |  COD   | TIXI CHTI MAL2 TIXI
                1  |  EMR   | 21 ALBH HERS MAS1 SYOG TWTF
                1  |  ESA   | FAA1 THU2 FAA1
                1  |  GFZ   | FAA1 KOUR MAL2 AUCK KOUR NICO
                1  |  GRG   | CHTI GLSV LMMF MAL2 PDEL SYOG TRO1 CHTI FAA1 GLSV
                1  |  GRG   | LMMF MAL2 PDEL SYOG TRO1
                2  |  COD   | TIXI LMMF SYOG TIXI
                2  |  EMR   | NRC1 YAR2 ALBH MAS1 NIST NRC1 SFER YAR2
                2  |  GFZ   | GRAZ KOUR MAL2 GRAZ KOUR MAL2 STHL
                2  |  GRG   | GLSV MAL2 SYOG GLSV MAL2 SYOG
                3  |  COD   | SYOG TIXI FAA1 NTUS SYOG TIXI
                3  |  EMR   | HERS MAS1 SFER
                3  |  ESA   | BAKE DGAR BAKE DGAR REUN
                3  |  GFZ   | BAKE SALU TRO1
                3  |  GRG   | 12 12 GLSV MAL2 NKLG SYOG GLSV LMMF MAL2 NKLG SYOG
                4  |  COD   | FAA1 SAVO SYOG TIXI BAKE FAA1 SYOG TIXI
                4  |  EMR   | HERS MAS1 NIST SFER
                4  |  ESA   | MAL2 MAL2 REUN
                4  |  GFZ   | SAVO
                4  |  GRG   | 15 15 BAKE DAEJ FAA1 GLSV MAL2 SCUB SYOG TRO1 BAKE
                4  |  GRG   | DAEJ FAA1 GLSV MAL2 SCUB SYOG
                5  |  COD   | 9 FAA1 TIXI FAA1 TIXI
                5  |  EMR   | MAS1
                5  |  ESA   | DGAR LHAZ DGAR LHAZ
                5  |  GFZ   | 21 DRAO FAA1 MAL2 DRAO FAA1 MAL2 NTUS SAVO
                5  |  GRG   | 9 9 DAEJ MAL2 SYOG DAEJ MAL2 SYOG
                5  |  MIT   | 9 9 REUN REUN
                6  |  COD   | LHAZ NTUS TIXI LHAZ NTUS TIXI
                6  |  EMR   | HERS MAS1
                6  |  ESA   | SAVO SAVO
                6  |  GFZ   | ALBH MAL2 SFER TRO1 ALBH MAL2 SFER TRO1
                6  |  GRG   | DAEJ MAL2 PIE1 TRO1 DAEJ GLSV MAL2 PIE1 REUN TRO1

 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. 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.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) all IGS products,
    are based on the IGS realization of the ITRF2014 reference frame (IGS14).
    For more information see IGSMAIL #7399.

 7. 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     .6     .9      16     10     -9    -.43
       EMR  |   0 |   -2.2     .5   -3.7      -2     53    -37    -.15
       ESA  |   0 |    -.2    -.5    -.9      -4     -6    -10    -.49
       GFZ  |   0 |     .1     .6    1.3      12    -13     -4    -.42
       GRG  |   0 |    -.3    1.2    7.1      27     26      5    -.52
       JPL  |   0 |    -.1    1.4  -10.3     -37    -60     49     .01
       MIT  |   0 |   -2.2   -6.3    1.4     -17     29      2    -.20
       NGS  |   0 |    -.7   -6.9   -5.5       7     -2     13    -.21
       SIO  |   0 |   -5.1   -4.8  -10.4     -22     -9     -2    -.35

       COD  |   1 |     .3     .2     .9       2      7     -7    -.44
       EMR  |   1 |   -3.6    5.3  -12.8      12     47      3    -.08
       ESA  |   1 |    -.7    -.4    -.9      -4      3    -13    -.48
       GFZ  |   1 |     .8    -.0     .7      -6    -34      0    -.39
       GRG  |   1 |    3.8    -.3  -10.4      43     14     33    -.38
       JPL  |   1 |    2.2   -1.3   -8.4       3    -28     93     .01
       MIT  |   1 |   -1.5   -5.5    1.1       8     40      6    -.07
       NGS  |   1 |   -5.1   -7.6    1.7      10    -31     -8    -.26
       SIO  |   1 |   -3.0   -4.5   -9.3      -7    -10      9    -.14

       COD  |   2 |     .0     .1     .8       8     11     -1    -.37
       EMR  |   2 |    7.3   -2.6   -7.3      18     42     -7    -.31
       ESA  |   2 |    -.1    -.7   -1.1      -7     -5     -2    -.43
       GFZ  |   2 |     .9     .3     .9       2    -40     -5    -.46
       GRG  |   2 |   -5.1   -7.9   18.9      46    -15     46    -.22
       JPL  |   2 |    6.9   -5.7   -5.3      -1    -78    106    -.24
       MIT  |   2 |   -2.0   -9.3    3.5      -1     32      9    -.23
       NGS  |   2 |   -2.4  -11.0   -3.8      27     -3      0    -.19
       SIO  |   2 |   -1.4   -2.7   -4.9     -11    -12     -6    -.46

       COD  |   3 |     .1     .1    1.3      10     18      3    -.37
       EMR  |   3 |    4.0   -4.8   -7.3      21     40    -23    -.58
       ESA  |   3 |    -.4    -.1   -1.1     -15      6    -20    -.53
       GFZ  |   3 |     .4     .5     .6       7    -31     -6    -.41
       GRG  |   3 |    -.2   -6.0    -.9      17     10     45    -.39
       JPL  |   3 |   11.9   -4.1   -4.3     -55    -44     72    -.04
       MIT  |   3 |   -3.7   -6.5    4.8      -8     17      5    -.15
       NGS  |   3 |    1.4   -6.0   -8.7      30     -1     -5    -.29
       SIO  |   3 |   -2.5   -2.6   -8.7       0    -28      0    -.16

       COD  |   4 |     .0     .3     .9       7     12     -9    -.41
       EMR  |   4 |    3.5   -2.5   -9.1      11     54    -36    -.15
       ESA  |   4 |    -.5    -.2    -.8     -10     17    -14    -.52
       GFZ  |   4 |     .4     .5    1.0      10    -30     -3    -.41
       GRG  |   4 |    2.5     .8   10.0      49     19     27    -.17
       JPL  |   4 |    9.5   -6.5    -.0     -33    -40     46    -.07
       MIT  |   4 |    -.5   -6.8    5.1     -12     46      2    -.11
       NGS  |   4 |    2.0   -4.2   -1.0       4     -3    -15    -.23
       SIO  |   4 |    1.4   -1.7   -3.7     -19     -5     -4    -.40

       COD  |   5 |     .7    -.1    1.2       5      4     -9    -.43
       EMR  |   5 |   -2.5    2.7  -11.0     -21     46      4    -.16
       ESA  |   5 |    -.3    -.9   -1.0     -12      3     -6    -.42
       GFZ  |   5 |     .9     .3    1.1       0    -36     -8    -.41
       GRG  |   5 |   -5.6    7.4    1.9      23     17     43    -.35
       JPL  |   5 |   -1.1   -2.1   -8.7      -8    -28     98     .19
       MIT  |   5 |   -1.8   -3.7    3.7     -36     22     15    -.20
       NGS  |   5 |   -2.4   -9.7   -2.2      31    -12      7    -.21
       SIO  |   5 |   -5.4    -.6   -7.1     -44    -18      0    -.24

       COD  |   6 |     .3     .2     .9       8     -2     -2    -.58
       EMR  |   6 |   -1.2   -1.3  -10.3      15     22    -16    -.39
       ESA  |   6 |    -.1    -.7    -.2       4     -1    -15    -.54
       GFZ  |   6 |     .5     .2     .9       0    -27     -3    -.42
       GRG  |   6 |   -6.3    5.3    4.7      34      1     45    -.45
       JPL  |   6 |    5.6   -7.4   -5.9     -35    -40     76     .08
       MIT  |   6 |     .7   -6.2    -.3     -15     30      8    -.19
       NGS  |   6 |   -1.3   -4.0   -8.9      -6      1    -26    -.39
       SIO  |   6 |   -1.9   -3.9  -10.9     -28     11      4    -.25


 8. 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.

 9. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) the absolute antenna model is introduced (IGSMAIL
    #5438). The antenna phase center offsets and phase center variations are given
    in the file:
        ftp://igs.org/igscb/station/general/igs05.atx
    These antenna calibrations are also used in the homogeneously reprocessed IGS
    products from GPS Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) the absolute antenna
    model is updated (IGSMAIL #6255 & #6374) as given in the file:
        ftp://igs.org/igscb/station/general/igs08.atx
    
    The JPL solution did not use IGS08/igs08.atx until GPS Week 1649, which caused
    their RMS clock residuals to be higher during that period than for the other
    centres; from GPS Week 1632 through 1648 the JPL solution is excluded from the
    weekly SINEX combination.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) the absolute antenna
    model file has been updated to igs14.atx to be consistent with IGS14.
    See IGSMAIL #7399 for more information
        ftp://igs.org/pub/station/general/igs14.atx


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 1.1961.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1961.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 2.1961.[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 3.1961.[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 5.1961.0-6). 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 1961 summary.                       (Aug 06, 2017 - Aug 12, 2017)

Table 1.1961.a   GPS week: 1961   MJD: 57971.000-57977.000

         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  275|    1     0     3     7    10    -7   .03   10   10 |    -535    -355     11    102
        |    0     0     2    16    19     6   .02           |     360     493
emr   80|    0     2    -3    25     3     5   .15   16   16 |     612    -410     20    144
        |    1     1     0    20    14    13   .04           |    1121     448
esa  150|    0     0    -3    -1     0   -11  -.02    9    9 |   -1431    -235      8    153
        |    0     0     1    13    15     9   .02           |    1035     997
gfz  196|   -1     1     1   -11     1     7   .12   10   10 |    -158    -103     11    128
        |    0     0     1    16     5     7   .04           |     356     642
grg  107|    1     0     4   -11     0    21  -.32   17   16 |      65     -63     13    175
        |    0     0     6    17    15    20   .04           |     268     395
igr  n/a|    0     0     1    -9   -12     3   .02    4    4 |   -5050     -17     12     81
        |    0     0     0    10    11    14   .01           |     688     599
jpl   80|    0     0    -2    21   -14    32   .22   12   12 |     408    -336     40    206
        |    1     0     2    31    17    21   .02           |     706     481
mit  349|    0    -2     3    -8   -10    21  -.14   13   11 |    -482     -67     37    326
        |    0     0     0    30    26     5   .04           |     600     416
ngs  216|    0     0    -2     5     0     0   .08    8    7 |    -529    -369    959   2238
        |    0     0     1    17    13    11   .07           |     321     464
sio  351|    0     0     0    -7   -11   -12  -.04   11   11 |     ---     ---    ---    ---
        |    0     0     1    24    36    21   .05           |     ---     ---


Table 1.1961.b   GPS week : 1961   MJD: 57971.000-57977.000   

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

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    4    4    4    4    3    4    4 |
   2  |    5    5    5    5    4    5    5 |
   3  |    3    3    3    3    3    3    3 |
   4  |    0    0    0    0    0    0    0 |
   5  |    4    5    4    4    4    4    4 |
   6  |    5    4    4    4    4    5    4 |
   7  |    5    5    5    5    5    5    5 |
   8  |    3    3    3    4    3    4    3 |
   9  |    4    4    4    3    4    4    4 |
  10  |    3    3    3    3    3    4    4 |
  11  |    4    4    4    4    4    4    4 |
  12  |    5    5    5    5    5    5    5 |
  13  |    4    4    3    4    4    4    4 |
  14  |    4    4    4    4    4    4    5 |
  15  |    4    4    4    4    6    4    4 |
  16  |    5    6    5    5    6    5    5 |
  17  |    5    5    6    6    5    5    5 |
  18  |    6    5    5    5    6    6    6 |
  19  |    5    6    6    6    6    6    6 |
  20  |    4    4    4    4    4    4    4 |
  21  |    5    5    5    5    5    6    5 |
  22  |    5    5    5    5    5    5    5 |
  23  |    5    4    5    4    5    5    5 |
  24  |    3    3    3    3    3    3    4 |
  25  |    4    4    4    4    4    4    6 |
  26  |    6    5    5    4    5    5    5 |
  27  |    3    3    3    4    4    4    3 |
  28  |    5    4    4    4    4    4    4 |
  29  |    5    5    5    5    5    5    5 |
  30  |    3    3    3    3    3    3    3 |
  31  |    7    7    7    6    6    6    6 |
  32  |    4    4    4    4    4    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
         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 2.1961.0   GPS week: 1961   Day: 0   MJD: 57971.000                            

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  275|    1     0     4    43    16   -11   .05   10   10 |    -553    -310     10     99
emr   80|   -2     2    -4    29    -4     7   .12   16   16 |    2748    -558     17    121
esa  150|    0     0    -5    -4   -16    -6  -.03    9    9 |    -681    -890      9    177
gfz  196|    0     1     0    -8    -1     6   .19   11   12 |    -158     -15     11    112
grg  106|    1     0    10   -10    -3     8  -.33   17   15 |    -128     361     14    205
igr  n/a|    0     0     0    -1   -26     2   .02    5    5 |   -4306    -346     11     89
jpl   80|   -1     0    -4    29   -25    18   .19   12   12 |    1904    -580     39    211
mit  350|    0    -1     2   -36    -8    17  -.20   14   12 |     -49     -88     37    359
ngs  218|   -1    -1    -2     5     5     6   .13    8    7 |    -540    -294    906   1850
sio  352|    0     0     0   -31    -6    -7  -.11   11   11 |     ---     ---    ---    ---

Table 2.1961.1   GPS week: 1961   Day: 1   MJD: 57972.000                            

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  275|    0     0     7    -4   -17    -8   .04   10    9 |    -632    -212     12    107
emr   80|    0     4    -3    17    22    18   .15   16   16 |    1501   -1018     24    136
esa  150|    0     0    -3   -25     0    -7  -.04    9    9 |   -2050    -437      9    158
gfz  196|    0     0    -1   -29     1     5   .07   10   10 |    -537    -343     11    149
grg  107|    1     0    -7    -2     9    30  -.33   18   17 |      19    -118     14    164
igr  n/a|    0     0     2   -23    -8    -3   .02    5    5 |   -5326    -761     14     85
jpl   80|    0     0    -2    54    10    -3   .25   12   12 |     595    -997     40    207
mit  350|    1    -2     4    37     3    14  -.16   14   11 |    -555    -133     41    309
ngs  218|    0     0    -1     0    -1    -8   .15    9    8 |    -729     100    815   2487
sio  350|    0     0     2    29     2   -13  -.08   11   11 |     ---     ---    ---    ---

Table 2.1961.2   GPS week: 1961   Day: 2   MJD: 57973.000                            

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|    1     0     4    -1    13    -6   .01   10   10 |    -673    -282     12    106
emr   79|    0     2    -2    37    23    24   .11   15   15 |     438    -189     23    165
esa  150|    0     0    -4     4     9   -20  -.04    9    9 |   -1032     513      8    154
gfz  193|   -1     1     1     0    -1    -4   .12    9    9 |    -526     704     11    128
grg  107|    1     0     9    -2     3    34  -.37   19   19 |    -107     110     15    167
igr  n/a|    0     0     1    -8    -2   -13   .03    4    4 |   -5993     441     12     74
jpl   80|    1     0    -4    56   -28    17   .20   12   12 |    -155      37     43    206
mit  350|    0    -1     2     3   -43    16  -.15   13   10 |   -1027     353     36    311
ngs  217|   -1     0    -3   -14    20     8   .15    8    7 |    -652    -313    898   2356
sio  354|    0     0     0    -7   -28   -11  -.04   11   10 |     ---     ---    ---    ---

Table 2.1961.3   GPS week: 1961   Day: 3   MJD: 57974.000                            

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  278|    1     0     2     1    33     3   .01    9    9 |    -672    -167     11     88
emr   80|    1     0    -3    27    -2   -17   .11   15   15 |    -142     325     22    126
esa  150|    0     0    -3   -11   -16   -28  -.01    9    9 |    -690   -1540      9    153
gfz  198|   -2     0     2    -2    -6     4   .13    9    9 |    -305     648     11    147
grg  108|    1    -1     2   -34   -31    54  -.38   19   19 |    -159     296     14    155
igr  n/a|    0     0     2   -21   -28    -1   .02    4    4 |   -5535     831     13     82
jpl   80|    0     0     1   -20   -38    40   .20   12   12 |     355     345     40    198
mit  350|    1    -1     3    17    19    28  -.16   13   11 |   -1017     462     36    342
ngs  218|    0     0    -3     0    -2    -4   .06    8    7 |    -737     -74   1008   2306
sio  358|    0     0     2    12     4    11  -.03   11   10 |     ---     ---    ---    ---

Table 2.1961.4   GPS week: 1961   Day: 4   MJD: 57975.000                            

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  279|    0     0     0    -2    27    -9   .06    9    9 |    -916     148     13    117
emr   81|    0     1    -2    15     2    -5   .15   15   15 |    -135    -773     21    161
esa  150|    0     0    -1     2    20    -1  -.02    8    9 |   -2264     540      7    137
gfz  199|   -1     0     1     8    10    13   .11   10   10 |     133   -1005     11    117
grg  110|    2     0     9     0     6    19  -.29   18   16 |     -52      51     13    176
igr  n/a|    0     0     1   -13   -11    16   .00    4    4 |   -5085    -595     12     80
jpl   80|   -1    -2    -2     8   -11    52   .23   12   12 |      73    -750     39    218
mit  349|    0    -2     3   -28   -48    23  -.13   13   11 |   -1044      63     36    305
ngs  221|    0     0    -3    19    -2   -16   .03    8    7 |    -715    -343    992   2222
sio  352|    0     0     0   -34   -60     6  -.01   12   10 |     ---     ---    ---    ---

Table 2.1961.5   GPS week: 1961   Day: 5   MJD: 57976.000                            

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  276|    2     0     0     6    13   -14  -.00   11   11 |     230   -1420     14    114
emr   79|   -1     3    -3    -8   -11     3   .19   16   16 |    -314    -130     20    154
esa  150|    0     0    -1     2    17    -7   .01    9    9 |   -3062    1186      8    146
gfz  198|   -1     1     1   -37     3    15   .12   10   10 |    -173      -1     13    142
grg  108|    1     0     4   -38    15    -4  -.26   15   14 |     529    -756     13    182
igr  n/a|    0     0     0     4     0    -4   .03    4    4 |   -5103     446     15     91
jpl   80|    1    -1    -1   -17   -13    50   .22   11   11 |     -71       0     44    208
mit  349|    0    -2     2    -6    -8    20  -.09   13   10 |     515    -748     37    364
ngs  214|    0     0    -1    36     1     3  -.01    9    8 |     167   -1356   1283   2451
sio  344|    0     0     0     7   -44   -16   .02   12   12 |     ---     ---    ---    ---

Table 2.1961.6   GPS week: 1961   Day: 6   MJD: 57977.000                            

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  274|    1     0     5    11   -13    -2   .04   11   10 |    -530    -243     11     87
emr   84|    0     0    -2    56    -9     3   .20   16   15 |     193    -531     16    150
esa  150|    0     0    -2    18    -9    -4   .02    8    8 |    -238   -1023      8    146
gfz  197|   -1     2     2    -9     3    14   .10   11   11 |     457    -710     11    106
grg  108|    1     0     3     5     5     5  -.31   16   15 |     357    -388     14    182
igr  n/a|    0     0     1     0   -10    29  -.01    5    5 |   -4007    -140     13     68
jpl   80|    0     0    -1    36     3    48   .24   11   11 |     155    -409     36    195
mit  349|    1    -2     4   -48    11    27  -.11   14   12 |    -203    -378     41    298
ngs  212|    0     0    -3    -8   -24    16   .03    9    8 |    -500    -307    812   1995
sio  352|   -1    -1     0   -26    48   -53  -.00   11   10 |     ---     ---    ---    ---

       
       
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 3.1961.0   GPS week: 1961   Day: 0   MJD: 57971.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   14    8    9   15    4   10    8    7    6    3 |    35   36   34   34   36   34   36   33   36   34    34
   2  |   12   15    6   13   21    6   12   15    9   13    4 |    32   35   32   35   31   32   34   33   33   32    31
   3  |    8   14    6    8   10    5   12    8    7    8    3 |    35   33   36   35   36   35   38   32   37   34    34
  X4  |    4  ---  ---  ---  ---   30   24  ---  ---  ---    0 |    70  ---  ---  ---  ---   71   69  ---  ---  ---    70
   5  |   11   10    7   13   14    6    9   10    9   11    4 |    30   30   28   31   27   28   31   23   30   22    26
   6  |   12   16    9   14   22    4   11   11    7   10    4 |    38   42   38   38   35   37   39   37   38   36    37
   7  |   13   16   10   11   15    5    8   16    9   14    4 |    41   42   38   40   41   38   39   34   38   38    38
   8  |    6   13    8    7   10    4    9    8    8    8    3 |    32   32   31   35   33   32   31   30   35   31    32
   9  |    8   14    9   10   10    5   10    9    7    9    3 |    51   51   44   52   48   49   49   50   49   51    50
  10  |    7   12    5    7   15    4    8   10    7    8    3 |    38   39   38   37   33   36   40   35   39   41    37
  11  |    7   11   11   10   15    4   10   10    7   10    3 |    43   44   40   45   39   43   45   45   44   43    42
  12E |   11   29    7   11   20    6   18   11    8   11    5 |    55   55   58   61   59   60   54   65   64   64    60
  13  |    9   12   12   14    9    5   12    8    9   12    4 |    41   40   39   42   38   40   39   41   41   41    40
  14  |    9   12   10   13    9    4   10   12    6   10    3 |    44   41   41   44   42   42   38   47   45   44    43
  15  |    8   14   10   12    9    4   15   12    9   12    4 |    64   69   67   54   66   65   68   61   64   52    64
  16E |   11   22    7   14   24    5   19   13   10    9    5 |    27   29   36   40   28   35   29   39   35   36    33
  17  |    9   14    8   16   20    5    9   14    8   14    4 |    40   42   39   41   34   41   41   47   41   28    40
  18  |   11   27    9   14   18    6   16   20    9   12    5 |    36   43   39   38   33   38   41   38   41   40    37
  19  |   12   21    7   15   18    6   11   15    8   20    5 |    32   38   33   39   32   35   36   39   35   34    33
  20  |    8   12    7   10   16    3    8   11    9   10    3 |    29   28   28   26   26   25   29   22   27   25    25
  21  |    8   11    7   11   26    4    9   17    8   11    4 |    35   38   36   40   33   35   38   38   36   34    34
  22  |   14   13    9   10   18    6    9   15   11   13    4 |    30   26   27   32   29   31   28   28   35   28    28
  23  |   11   24   10    9    8    6   15   13    9   12    4 |    34   37   35   41   35   36   31   41   41   38    37
  24  |    6   13    7   12   10    4   12    8    5    5    3 |    32   34   33   33   30   31   35   32   33   34    32
  25E |    9   11    9    8   23    5   10   11    8    8    4 |    24   28   28   25   26   24   27   27   25   27    25
  26E |   17   17   10   14   32    4   10    9    8   10    5 |    24   31   27   27   25   23   23   24   25   25    24
  27  |    9   10    8    6   11    5   10    9    9    8    3 |    30   29   28   30   30   28   29   29   33   30    29
  28E |   15   12    6   12   19    4    9    9   10    9    4 |    40   34   34   34   39   34   35   34   33   33    34
  29  |   10   25    9   14   15    5   19   18   10   11    5 |    35   36   34   36   34   34   35   37   34   35    34
  30  |    6   13    6    9    9    2   10    7    6    6    3 |    34   38   34   33   36   32   35   32   36   35    34
  31  |   10   18   13   12   16    6   16   38   12   11    6 |    38   42   40   41   39   37   41   50   35   36    36
  32  |    8   14   10    8   10    4   10   12    6   10    3 |    31   38   29   38   30   33   38   36   34   37    33
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   16    9   11   17    5   12   14    8   11      |T   37   38   36   37   35   37   38   37   37   36    37
 WRMS |   10   16    9   12   15    5   12   12    7   11      |NE  38   38   36   38   35   37   39   37   38   35    37
 MEDI |    9   14    8   11   15    5   10   11    8   10      |MD  35   38   35   38   34   35   36   36   36   35    34

Table 3.1961.1   GPS week: 1961   Day: 1   MJD: 57972.000                            

        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  |   10   14    7    6   18    3   11    9    9    7    3 |    20   25   20   21   20   19   25   20   22   20    20
   2  |   13   14    7   12   17    6   11   14    8   16    4 |    23   26   23   26   22   24   24   26   24   26    22
   3  |    7   13    6    7   16    5    9    9    8    6    3 |    20   22   20   20   24   18   26   19   20   22    19
  X4  |    4  ---  ---  ---  ---   50   18  ---  ---  ---    0 |    67  ---  ---  ---  ---   88   75  ---  ---  ---    66
   5  |   10    9    8   12   24    5    7   11    9   14    4 |    19   20   15   19   23   16   22   11   20   13    15
   6  |   10   20    7    8   10    4    9    9    5    7    3 |    24   33   25   22   23   22   29   26   23   25    23
   7  |   13   16   13   13   18    5   10   16   11   14    5 |    30   33   27   27   30   24   33   23   28   27    26
   8  |    5   12    7    6   11    3    9    7   10    8    3 |    20   23   19   21   16   19   21   19   21   16    19
   9  |   10   15    9    7    9    4    9    9    5   11    3 |    36   42   34   35   32   34   44   35   37   40    36
  10  |    7   10    5    6   17    5   10   10    7    8    3 |    25   27   25   29   23   24   28   27   29   31    26
  11  |    8   12   13    8   15    3    7   10    9   10    4 |    27   31   29   28   25   27   32   30   30   27    27
  12E |   10   28    6   12   16    4   22   10    8    8    4 |    37   37   40   43   39   40   37   43   43   41    39
  13  |    7   11   12    6   10    4    9    8    9   11    3 |    20   23   18   24   18   20   23   20   25   25    20
  14  |    5   12   11   11   15    3   10   14    6    9    3 |    27   22   26   25   24   25   22   29   28   29    25
  15  |    7   13   11   12   16    4   18   11    8   12    4 |    41   44   42   37   46   44   44   39   43   37    42
  16E |   12   26    8   15   30    6   16   12   11   10    5 |    23   23   24   30   29   26   21   27   29   26    23
  17  |   10   20   10   14   19    4    9   13   11   14    5 |    33   38   32   38   28   35   36   40   38   19    34
  18  |    9   24    8   14   21    6   16   20    9   11    5 |    18   27   21   22   24   19   27   24   23   21    18
  19  |   13   23    9   15   19    5   12   13   10   21    5 |    19   30   20   25   21   21   23   22   22   20    19
  20  |    8   10    8   12   21    4   10   13   11   10    4 |    17   16   15   18   21   15   17   16   16   18    14
  21  |   11   20    8   10   24    5   13   16    9   13    5 |    22   25   22   27   16   22   25   27   27   26    21
  22  |   10   12   11   10   22    5    9   16   11   10    4 |    17   19   17   18   22   15   20   12   16   13    13
  23  |   10   22   10    8    6    5   14   14    8   13    4 |    14   18   17   20   15   18   17   19   23   20    16
  24  |    7   10    7    8    9    3   13    9    5    7    2 |    15   20   16   17   16   15   24   12   18   20    15
  25E |    7   11    9    8   23    6   10    9   10    9    4 |    19   22   22   22   22   20   20   22   22   21    20
  26E |   19   13   13   12   23    5   10    8    8    9    5 |    26   23   24   25   22   21   20   24   24   24    22
  27  |    8   11    8    6   15    3    9    8    9    8    3 |    17   19   16   17   15   15   20   16   18   17    16
  28E |   12   16    7   12   20    4   10   10    7    8    4 |    22   23   20   21   31   19   24   19   21   20    19
  29  |   10   22   11   10   15    4   16   15   12   13    5 |    24   21   16   21   18   19   21   23   21   21    19
  30  |    7   12    5    9   11    3    9    7    5    7    3 |    25   30   25   24   26   23   32   23   27   29    25
  31  |   11   20   11   12   21    7   15   39   12   13    6 |    20   30   21   24   26   20   27   36   23   20    18
  32  |    6   13    9    6   12    2   12   13    5   12    3 |    19   30   20   22   17   21   30   21   23   28    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   16    9   10   18    5   12   14    9   11      |T   24   26   22   24   23   24   27   24   25   23    23
 WRMS |    9   16    9   10   17    5   12   11    8   11      |NE  24   26   22   24   22   24   28   23   24   23    23
 MEDI |   10   13    8   10   17    4   10   11    9   10      |MD  22   25   21   24   23   21   24   23   23   22    20

Table 3.1961.2   GPS week: 1961   Day: 2   MJD: 57973.000                            

        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  |   10   11    7    8   24    4   10    7    9    9    4 |    30   35   32   35   37   32   33   31   36   33    32
   2  |   15   13    6   14   22    5    9   12    8   15    5 |    36   34   34   36   30   33   32   32   36   31    32
   3  |    6   11    7    7   18    4    9    7    8    7    3 |    36   38   35   39   41   34   35   35   37   36    36
  X4  |    2  ---  ---  ---  ---   26   27  ---  ---  ---    0 |   107  ---  ---  ---  ---  108  101  ---  ---  ---   107
   5  |   10   10    8    9   16    4    9   10    7   13    3 |    35   36   33   33   35   33   36   31   35   29    32
   6  |   10   23    7   10   22    4   10    9    7    8    4 |    35   40   33   32   35   31   36   33   33   34    33
   7  |   12   15   13   10   17    4   12   15   11   14    5 |    36   41   34   38   36   34   39   34   37   37    35
   8  |    8   12    6    4   17    3    8    5    9    8    3 |    31   31   32   33   31   31   31   30   34   30    31
   9  |   10   12   11    7   10    6   11    7    6    9    3 |    42   45   33   41   35   39   42   38   41   40    39
  10  |    7   10    6    8   17    2    9    9    5    7    3 |    32   36   33   36   33   32   35   33   33   38    33
  11  |   10    9   12    9   20    2    9    8    9   11    4 |    33   37   32   38   34   34   37   34   38   33    34
  12E |   15   25    8    9   14    4   18   10   11   10    4 |    26   25   22   27   22   25   25   28   31   28    25
  13  |    7   11   12    7   10    3    7    7    7    8    3 |    40   42   38   39   34   40   41   42   43   44    40
  14  |    9   10   11   12   14    5   12   13    6   10    4 |    44   44   40   45   44   44   41   42   44   44    43
  15  |    8   14   11    8   12    3   14   10    7   12    3 |    73   75   75   55   73   74   78   74   77   58    74
  16E |   15   23    9   13   23    5   18   13    8   11    5 |    33   35   32   34   35   32   29   34   34   32    32
 X17  |    7   17    9  ---   22    6   10   12   12  ---    5 |    35   37   33  ---   34   32   37   34   38  ---    35
  18  |   10   22    9   11   21    5   17   20    8   11    5 |    27   32   27   26   29   24   29   30   26   26    25
  19  |   11   22   10   13   21    4   12   13   11   24    5 |    29   34   30   36   28   30   31   33   34   32    30
  20  |    8   11    8    8   17    3   10   15    9    8    3 |    38   36   36   36   36   35   37   37   38   35    36
  21  |   10   11    8    8   33    5   11   18    7   13    5 |    30   32   31   32   35   29   32   31   31   30    29
  22  |   10   10   10   11   21    4   10   15   10   10    4 |    32   34   31   35   36   30   32   30   31   28    30
  23  |    8   22   12    9   12    5   19   11    9   11    4 |    37   40   34   41   39   37   35   36   41   36    37
  24  |    7   13   11    6   10    3    9    9    5    9    3 |    34   36   34   34   32   34   36   34   36   38    34
  25E |   10   11   10    8   22    3    7    9    9    7    4 |    38   40   37   36   39   36   36   38   36   38    36
  26E |   16   13   12   12   30    4    9    9    8    9    5 |    41   43   39   41   41   38   36   37   38   39    38
  27  |    8   11    6    6   15    3   10    5    7    5    3 |    29   31   30   30   29   29   32   30   33   29    30
  28E |   12   14    7   12   22    4   21    9    8    9    4 |    24   28   27   28   30   25   36   28   28   29    26
  29  |    8   23   10   10   14    3   13   11    9   11    4 |    42   42   41   43   40   41   42   45   43   43    42
  30  |    8   12    8    6   12    3   11    7    8    6    3 |    31   37   33   34   32   33   37   32   37   35    34
  31  |   12   19   13   12   19    5   16   35    9   14    6 |    37   40   34   35   34   34   38   39   35   33    32
  32  |    8   12    9    7   10    4   10   12    5   10    3 |    25   33   26   32   28   29   32   31   29   34    29
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   15    9    9   19    4   12   13    8   11      |T   37   37   34   36   35   36   38   35   36   35    36
 WRMS |   10   15    9    9   19    4   12   10    7   10      |NE  38   38   34   36   35   37   39   35   37   35    37
 MEDI |   10   12    9    9   17    4   10   10    8   10      |MD  35   36   33   35   35   33   36   34   36   34    33

Table 3.1961.3   GPS week: 1961   Day: 3   MJD: 57974.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5   11    8    7   24    3   11    8    5    9    3 |    28   30   28   28   30   27   29   28   28   29    27
   2  |   12   14    9   13   21    6   11   13    8   14    4 |    26   30   29   32   26   27   26   27   30   27    27
   3  |    8    9    7    7   22    6   10    7    5    8    3 |    28   29   26   29   31   27   32   27   24   29    27
  X4  |    2  ---  ---  ---  ---   28   21  ---  ---  ---    0 |    51  ---  ---  ---  ---   57   51  ---  ---  ---    50
   5  |    9   12    8    8   14    3   10   10    9    9    3 |    27   29   24   27   28   24   28   22   23   23    24
   6  |   12   18    7    9   24    3   10    9    9    9    4 |    28   33   28   28   29   28   30   30   31   31    28
   7  |   12   16   11   11   21    5   14   13   10   16    5 |    34   36   32   32   37   29   33   26   30   30    30
   8  |    7   12    8    7   17    5    9    8    8    9    3 |    28   27   26   27   28   25   28   25   29   29    27
   9  |    8   13    9    7   11    5   10    7    5   10    3 |    37   43   27   41   34   37   39   37   36   39    37
  10  |    6   11    5    8   19    3   10   11    6    8    3 |    27   29   27   28   29   26   31   27   28   32    27
  11  |    7    9   13    9   20    3   10   11    6   11    4 |    35   34   29   36   28   32   34   34   34   33    32
  12E |   10   26    6    8   17    3   18   12    9   10    4 |    27   29   27   29   31   26   28   29   31   29    27
  13  |    8    9   11    8   12    3    8    9    6   10    3 |    28   30   28   34   29   29   32   31   31   35    30
  14  |    8   13   11   12   11    3   11   15    6   12    4 |    25   27   25   29   26   26   26   31   26   28    26
  15  |    8   12   11   11   14    3   13   12    9   12    4 |    40   43   41   39   39   37   44   36   38   44    39
  16E |   12   22    8   11   25    3   16   12    9   11    4 |    22   27   27   28   26   26   24   26   25   27    24
 X17  |   10   23   12   14   25    6   10   14   12  ---    6 |    50   52   48   53   47   48   52   50   50  ---    49
  18  |    9   24    7   12   21    5   17   21    9   11    5 |    26   33   26   26   29   24   31   26   25   25    24
  19  |   13   20   10   14   21    5   12   15   12   25    6 |    27   29   28   33   27   27   28   29   29   28    27
  20  |   10   13    6    9   19    4   11   15    8   10    4 |    26   28   24   24   26   22   29   26   24   26    24
  21  |    9   11    7    7   29    5   10   16    9   11    4 |    25   26   26   28   26   26   29   26   30   25    25
  22  |   10   10    8   11   26    5   10   17    7   13    4 |    24   24   24   25   30   23   25   23   23   24    22
  23  |    8   21    9   10   10    5   15   13    6   14    4 |    28   28   26   32   27   27   24   28   28   29    27
  24  |    7   12    9    6   11    3   12   12    4   10    3 |    26   28   28   28   25   26   29   27   27   32    27
  25E |   10   13    8    5   16    3    8   11    7    8    3 |    28   29   28   26   28   26   28   26   28   28    26
  26E |   13   15   12   10   19    3   10    9    7    7    4 |    23   29   27   28   25   24   23   25   25   23    24
  27  |    7   13    7    7   19    4    9    8    7    8    3 |    24   24   25   23   24   22   28   25   26   27    24
  28E |   12   14    7   10   22    3   12   10    8   11    4 |    28   25   27   30   28   25   30   27   24   30    26
  29  |    7   21   11   10   15    4   15   13    9   12    4 |    28   30   26   27   27   27   30   26   29   28    26
  30  |    9   11    6    7   12    3   10    6    4    7    2 |    31   35   31   34   32   29   35   28   31   31    31
  31  |   12   19   12   12   15    5   14   31   10   13    5 |    33   35   31   29   34   28   33   33   31   29    28
  32  |    7   13   10    8    9    2   10   12    7   10    3 |    26   32   23   27   23   27   34   31   26   32    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   15    9    9   19    4   12   13    8   11      |T   29   31   28   30   29   28   31   28   29   29    28
 WRMS |    9   15    9    9   19    4   12   11    7   10      |NE  30   31   28   30   29   29   32   29   29   29    29
 MEDI |    9   13    8    9   19    3   10   12    8   10      |MD  28   29   27   28   28   27   29   27   28   29    27

Table 3.1961.4   GPS week: 1961   Day: 4   MJD: 57975.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5   10    5    8   20    3   12    8    6    9    3 |    28   30   28   29   29   27   31   26   27   33    27
   2  |   10   10    8   14   19    4   11   13    9   14    4 |    24   23   23   31   23   24   24   24   26   25    23
   3  |    8   10    6    8   17    3   11    7    5    8    3 |    27   25   24   24   26   23   28   21   25   26    24
  X4  |    2  ---  ---  ---  ---   24   28  ---  ---  ---    0 |    75  ---  ---  ---  ---   75   71  ---  ---  ---    74
   5  |    7   11    8    9   13    4   10   12    9   13    3 |    26   25   20   26   22   22   25   18   24   24    21
   6  |   11   15    6   11   25    3   12    8    7   10    4 |    23   28   23   24   26   23   27   24   23   27    23
   7  |   11   15    9   10   14    4   10   13   10   14    4 |    25   29   23   23   24   22   30   19   22   23    22
   8  |    8   12    6    7   12    3    8    7    6    8    3 |    22   25   23   23   23   21   27   22   22   25    22
   9  |    8   14    9    6    8    3   12    8    9    9    3 |    27   36   40   31   25   28   48   33   26   33    28
  10  |    8   12    6    9   16    5    9   10    6    8    3 |    27   29   26   27   28   25   30   25   26   30    26
  11  |    5    8   11    9   15    4    9   11    6   11    3 |    29   31   27   29   24   28   33   30   27   28    27
  12E |    7   25    6   11   23    2   19   11    9    8    4 |    30   30   28   33   32   28   30   32   29   32    29
  13  |    8   10   10    9    7    3    6   10    9    8    3 |    27   27   26   26   25   26   28   30   27   29    26
  14  |    5   10   10   11    9    3    9   13    7   12    3 |    34   31   31   35   31   33   30   36   34   34    33
 X15  |    9   11   12  ---   19    6   13   18   12  ---    5 |    83   84   86  ---   79   84   87   83   87  ---    84
  16E |   13   30    8   15   27    5   17   13   11   11    5 |    14   23   19   24   20   19   18   22   21   20    17
  17  |    9   16   10   14   21    5   13   15    9   17    5 |    26   28   22   27   22   23   30   27   27   38    23
  18  |   11   24    7   15   19    6   17   22   10   15    5 |    24   27   23   24   26   21   27   25   24   26    21
  19  |   11   21    8   16   19    6   13   13    9   22    5 |    23   27   23   28   19   22   26   25   25   25    22
  20  |   10   10    6   10   18    4   12   15    9   10    4 |    26   22   22   21   23   21   23   19   23   21    21
  21  |    8    9    9    9   28    6    9   18   10   15    5 |    24   23   20   26   23   23   25   24   26   24    20
  22  |   12   10    7   12   19    4   12   17    9   13    4 |    24   21   20   22   24   20   22   18   22   20    18
  23  |    8   23    8   10    8    5   16   14    8   13    4 |    20   23   19   26   20   21   21   25   24   25    21
  24  |    8   10    9    7   13    4   10   10    4   10    3 |    22   25   21   24   19   22   27   21   22   29    22
  25E |    8   11    9    5   19    3   10    9    7    8    3 |    18   25   21   20   22   19   22   23   19   21    19
  26E |   13   12   11    9   33    4    9   10    7    9    4 |    21   25   22   23   28   19   20   23   17   21    19
  27  |   11   12    8    9   14    3   11    9    7    9    3 |    21   23   23   21   21   20   25   22   21   25    21
  28E |   11   11    6   11   19    3    8   10    8    9    3 |    27   26   26   25   27   25   26   26   25   25    24
  29  |    8   21   12   12   16    3   15   13   11   12    4 |    36   34   33   36   33   33   37   36   35   36    34
  30  |    7   12    7    6   10    3    7    6    7    8    3 |    24   31   26   26   26   25   32   23   29   27    25
  31  |   10   17   11   11   12    6   13   30   10   16    5 |    23   30   22   23   20   22   29   26   20   23    19
  32  |    6   13    9    9    8    3   10   10    6   11    3 |    24   31   23   24   23   24   31   28   24   32    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   15    8   10   18    4   12   13    8   12      |T   28   28   26   26   26   27   30   26   26   26    26
 WRMS |    9   15    9   10   16    4   12   11    7   10      |NE  29   29   26   26   26   28   32   27   27   27    27
 MEDI |    8   12    8    9   17    4   11   11    9   10      |MD  24   27   23   25   24   23   27   25   25   25    23

Table 3.1961.5   GPS week: 1961   Day: 5   MJD: 57976.000                            

        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    6    8   16    3    9    7    7    9    3 |    26   27   26   24   23   23   27   25   25   30    25
   2  |   15   10    8   15   22    4   12   15   12   16    5 |    23   26   21   31   17   24   20   23   27   21    21
   3  |    9   10    7    7   11    3   10    5    6    9    3 |    23   27   22   23   26   21   26   20   22   23    22
  X4  |    1  ---  ---  ---  ---   38   21  ---  ---  ---    0 |    42  ---  ---  ---  ---   44   40  ---  ---  ---    42
   5  |    9   12    9    7    9    3    9   11    9   12    3 |    23   25   19   24   20   20   22   12   18   16    18
   6  |   13   17    8   14   22    3    9    9    7   11    4 |    24   31   22   26   21   21   26   23   23   25    22
   7  |   22   15    8   10   16    5   10   12   11   15    5 |    32   30   23   23   22   23   26   22   24   26    23
   8  |    7   13    7    9   12    3    8    7    9   12    3 |    19   20   21   19   18   17   21   17   18   22    18
  X9  |   11   14  ---    8   11    7  ---    8    8   12    4 |    91   88  ---   86   83   85  ---   87   83   89    87
  10  |    7   17    7    9   15    3   10   13    5   11    3 |    22   27   19   22   24   20   23   22   21   24    20
  11  |    6   11   11    8   12    4    8   10    8    9    3 |    25   27   23   24   24   22   27   25   24   22    23
  12E |   13   25    7    8   23    2   18   12   12   13    5 |    24   28   30   36   26   30   27   33   37   34    31
  13  |   12   12   13    7    7    4    9   11    7   10    4 |    24   32   24   28   22   26   26   30   23   29    25
  14  |    8   11   10   13    9    5   11   15    7   13    4 |    35   34   32   33   34   35   34   40   37   41    34
  15  |    9   11   11    7    8    3   14   12    9   14    4 |    52   57   51   71   54   52   51   51   48   74    51
  16E |   14   29    8   13   16    4   14   11    9    9    5 |    13   23   18   22   16   16   13   16   19   18    15
  17  |   11   15   10   13   19    3   12   13    9   17    5 |    38   36   34   29   35   32   40   33   33   21    32
  18  |   12   25   10   13   19    5   16   22    9   12    5 |    18   27   19   19   23   15   21   19   15   16    14
  19  |   14   21    9   14   19    4   14   14   10   20    5 |    19   26   20   27   14   21   21   22   22   19    19
  20  |   11   10    7    7   13    3    9   17    7    9    3 |    24   23   19   22   25   20   23   15   17   19    18
 X21  |    9  ---    9   10   25    5   22   20    7   14    5 |    18  ---   17   23   19   18   27   21   21   18    16
  22  |   11   15    9   10   17    4   10   16    9   11    4 |    18   21   16   19   25   16   18   13   14    9    13
  23  |   12   22    9   11    7    5   14   12    8   13    4 |    14   24   18   24   19   19   19   22   21   21    18
  24  |    8   11   10    5    9    3    8   11    5   11    3 |    23   27   25   25   18   24   25   25   22   33    24
  25E |   11   14   10    5   23    4    9    9    9    9    4 |    24   24   23   23   28   23   25   24   22   26    22
  26E |   13   14   11   10   20    4    9    8    9   11    4 |    23   28   26   25   26   23   25   23   26   27    23
  27  |   11   15    7    8   11    4   11    6    8   10    3 |    21   23   24   18   20   20   26   22   24   27    21
  28E |   14   13    6    9   12    3   13    8    9   10    3 |    23   22   19   20   18   18   21   22   21   22    18
  29  |   12   16   11   12   14    4   14   13   11   14    4 |    31   32   27   34   29   30   31   30   28   37    30
  30  |   10   13    5    8   13    4   11    5    8    8    3 |    24   28   23   20   19   22   25   20   25   25    22
  31  |   12   16   11   13   15    6   13   31   12   15    6 |    21   29   19   20   18   20   27   23   19   23    16
  32  |    6   12    9    8    9    4   10   11    7    9    3 |    17   29   20   20   18   19   28   24   20   26    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   16    9   10   15    4   11   13    9   12      |T   26   30   23   27   25   25   26   25   25   27    25
 WRMS |   11   16    9   10   14    4   11   10    8   12      |NE  27   31   23   28   25   26   26   26   25   28    25
 MEDI |   11   14    9    9   14    4   11   11    9   11      |MD  23   27   22   24   22   21   26   23   22   24    22

Table 3.1961.6   GPS week: 1961   Day: 6   MJD: 57977.000                            

        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  |   10   11    6    8   15    2    8    7    7    8    3 |    31   36   35   34   31   32   37   34   32   39    33
   2  |   12   11    7   19   19    6    9   15   11   13    5 |    35   34   35   43   33   35   33   36   38   37    35
   3  |    6   10    7    7   16    5   10    7    6    7    3 |    36   41   34   36   41   34   35   36   32   40    36
  X4  |    3  ---  ---  ---  ---   21   24  ---  ---  ---    0 |    60  ---  ---  ---  ---   62   61  ---  ---  ---    60
   5  |    8   13    7    8   16    4   10   11    9   14    4 |    39   41   34   39   41   35   35   35   34   37    36
   6  |   11   13    7   11   21    3    9   11    9    9    4 |    37   35   36   35   34   32   36   35   32   36    34
   7  |   12   15    9   11   11    4    8   13   10   13    4 |    42   43   38   36   40   36   43   32   38   36    37
   8  |    8   12    6    8   12    3    9    7    6    7    3 |    31   32   30   29   30   29   33   30   29   32    30
   9  |    9   12    8    7   10    5   12   12    8    8    3 |   142  139  130  142  141  141  131  143  141  142   141
  10  |   10   12    6    6   15    5    8   14    7    7    3 |    34   38   32   35   36   31   37   34   34   43    34
  11  |    7    9   10    9   13    3    8   12    8   11    3 |    44   47   44   47   40   44   49   47   45   46    44
  12E |   13   27    6   10   16    5   17   14   10   11    5 |    22   26   27   32   26   28   24   34   32   30    27
  13  |    7   11   10    7   10    3    9   10    8    8    3 |    43   47   43   44   40   43   46   47   43   47    44
  14  |    6   10   11   18   11    4   12   16    9   15    4 |    47   43   43   46   44   45   43   50   47   48    45
  15  |   10   11   11   10    9    2   11   12   12   14    4 |    69   71   71   61   70   69   73   68   71   67    69
  16E |   15   25    6   14   20    6   16   13   10   12    5 |    25   29   25   27   31   22   23   23   23   27    23
  17  |   14   13    9   16   21    6    9   16   12   15    5 |    57   53   55   49   50   50   56   49   53   43    52
  18  |   13   28    8   13   21    7   15   22   11   12    5 |    28   37   28   24   32   24   31   24   24   26    24
  19  |   15   18    8   18   22    7   11   17   12   20    6 |    33   34   34   41   29   34   35   37   38   39    34
  20  |   10   10    7   10   13    3   11   12   10   10    3 |    42   40   40   43   45   39   39   40   41   42    41
  21  |    8    9    7   10   23    5    8   22    8   13    4 |    30   31   28   35   35   29   33   32   31   34    29
  22  |   11   13    8   10   19    4   10   17   10   12    4 |    34   37   32   30   41   29   33   28   25   29    30
  23  |   11   23    8   11    8    5   13   13    9   12    4 |    34   41   34   38   36   34   34   36   35   35    34
  24  |    6   12    9    9    8    4    8   10    8    8    3 |    36   40   39   38   35   37   41   37   36   43    37
  25E |   12   43    9    7   20    5    9   11    7    8    6 |    48   64   45   47   50   46   47   47   46   48    47
  26E |   19   11   12   17   23    6   10    9   11    7    5 |    46   47   45   45   50   42   43   43   44   47    45
  27  |    9   13    7    9   12    4   10    9    4    6    3 |    31   33   33   30   32   30   35   34   31   36    32
  28E |   14   12    7   12   17    5    8    8    8    8    4 |    29   31   31   32   28   28   29   27   28   33    29
  29  |    8   19   10   14   13    4   12   15   10   14    4 |    42   41   39   45   41   40   43   43   39   49    41
  30  |    6   12    5    7    7    4   11    5    6    6    2 |    36   39   36   38   37   36   42   34   36   39    36
  31  |   11   16   10   13   13    5   13   30   11   16    5 |    37   42   36   31   39   32   40   31   31   33    32
  32  |    8   12   10   10    9    4   12   13    9    9    3 |    31   37   32   34   32   32   41   38   33   38    33
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   16    8   11   16    5   11   14    9   11      |T   41   43   40   41   41   40   42   40   40   42    40
 WRMS |   10   15    8   11   15    5   11   12    8   10      |NE  43   44   41   42   42   41   44   41   41   43    41
 MEDI |   10   12    8   10   15    4   10   12    9   11      |MD  36   40   35   38   37   34   37   36   35   39    35



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 4.1961   GPS week: 1961   MJD: 57971.0-57977.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3068 |U    7     6    15 |U    6     7    22 |U    8    10    19 |
emr | emr 2958 |U    9     7    19 |U    7     9    27 |U    9    11    20 |
esa | esa 2962 |     8     6    16 |U    6     8    24 |     8    10    19 |
gfz | gfz 2945 |U    8     6    15 |U    6     8    23 |U    8     9    18 |
grg | grg 2972 |U    8     7    15 |U    6     8    24 |     9    11    21 |
igr | igr 2971 |     8     6    15 |     6     7    21 |     8     9    19 |
igs | igs 2971 |     8     6    14 |     5     7    22 |     8     9    19 |
jpl | jpl 3058 |     8     7    18 |U    6     8    24 |U    9    12    21 |
mit | mit 2976 |     8     7    17 |U    7     8    27 |U    9    12    21 |



Table 5: Daily Precise Navigation Summary using the corresponding Centre orbit 
         positions and satellite clock corrections at 15 min intervals.

         Each line gives the daily station RMS w.r.t. the estimated coordinates 
         for the Latitude, Longitude and Height components.
        
         CLK  - Satellite clocks used.
         EPO  - Number of satellite clock epochs available for that day.
         Units: mm.

Table 5.1961.0   GPS week: 1961   Day: 0   MJD: 57971.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     7     5    14 |    10     9    24 |     8    12    20 |
emr | emr 2976 |     7     5    14 |     9     8    28 |     7    13    21 |
esa | esa 2976 |     7     5    12 |     9    10    23 |     8    11    21 |
gfz | gfz 2976 |     8     5    12 |     9     9    22 |     8    11    19 |
grg | grg 2976 |     7     5    14 |     9    10    26 |    10    12    23 |
igr | igr 2976 |     8     4    13 |    10    10    21 |     7    10    20 |
igs | igs 2976 |     7     5    12 |     9     9    22 |     8    11    20 |
jpl | jpl 3072 |     7     5    13 |     9    10    23 |     8    13    24 |
mit | mit 2976 |     7     5    13 |    10    11    26 |     9    13    22 |

Table 5.1961.1   GPS week: 1961   Day: 1   MJD: 57972.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     5     5    11 |     8     8    31 |     8     9    20 |
emr | emr 2974 |     9     8    19 |     7    10    32 |     8     7    14 |
esa | esa 2976 |     6     6    12 |     7     8    31 |     8    10    20 |
gfz | gfz 2976 |     6     6    10 |     8     8    32 |     8     9    19 |
grg | grg 2976 |     6     6    11 |     7     8    31 |     8    10    20 |
igr | igr 2971 |     6     5    11 |     7     7    30 |     8     9    20 |
igs | igs 2971 |     5     5    10 |     7     8    31 |     7     9    19 |
jpl | jpl 3072 |     6     6    16 |     7     8    33 |     9     9    21 |
mit | mit 2976 |     7    11    22 |    11    11    43 |     9    13    21 |

Table 5.1961.2   GPS week: 1961   Day: 2   MJD: 57973.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     7     7    17 |     4     7    19 |     8    13    20 |
emr | emr 2976 |    10     6    21 |     6    11    30 |    11    15    23 |
esa | esa 2976 |     9     7    17 |     4     9    22 |     7    12    20 |
gfz | gfz 2878 |     9     7    18 |     4     8    24 |     8    13    22 |
grg | grg 2976 |     8     7    16 |     5     7    21 |     8    15    23 |
igr | igr 2976 |     9     8    17 |     4     7    19 |     8    13    21 |
igs | igs 2976 |     9     7    16 |     4     8    20 |     7    13    21 |
jpl | jpl 3072 |     8     6    18 |     5    10    23 |     8    15    21 |
mit | mit 2976 |    10     7    18 |     4     8    24 |     9    16    25 |

Table 5.1961.3   GPS week: 1961   Day: 3   MJD: 57974.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3066 |     7     4    16 |     4     5    19 |     8    11    19 |
emr | emr 2970 |     9     9    20 |     6     6    24 |     9    14    18 |
esa | esa 2976 |     7     4    14 |     5     5    20 |     9    11    17 |
gfz | gfz 2970 |     7     4    14 |     4     5    20 |    10    11    18 |
grg | grg 2970 |     7     4    14 |     5     7    21 |     9    12    20 |
igr | igr 2970 |     8     4    14 |     4     4    20 |     9    11    16 |
igs | igs 2970 |     8     4    13 |     4     4    18 |     8    11    16 |
jpl | jpl 3072 |     7     6    18 |     5     5    20 |     8    13    19 |
mit | mit 2976 |     7     4    15 |     6     6    21 |     9    12    16 |

Table 5.1961.4   GPS week: 1961   Day: 4   MJD: 57975.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3065 |     8     9    15 |     5     7    22 |     7     9    19 |
emr | emr 2969 |    10     7    22 |     7    10    28 |     9     9    17 |
esa | esa 2976 |     9     9    16 |     6     8    24 |     7     9    18 |
gfz | gfz 2880 |     9     9    16 |     5     9    25 |     8     8    16 |
grg | grg 2970 |     9     9    16 |     6     8    22 |     8     9    20 |
igr | igr 2969 |     9     9    17 |     5     7    21 |     7     8    19 |
igs | igs 2969 |     9     9    16 |     5     8    22 |     7     8    17 |
jpl | jpl 3072 |     9     8    16 |     6    10    23 |     9    11    18 |
mit | mit 2976 |     9     9    16 |     5     7    23 |     9     9    19 |

Table 5.1961.5   GPS week: 1961   Day: 5   MJD: 57976.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3059 |     7     3    17 |     5     6    20 |     9     8    16 |
emr | emr 2869 |     8     5    19 |     6     7    27 |    10     9    25 |
esa | esa 2880 |     7     4    24 |     5     7    24 |     9     7    18 |
gfz | gfz 2965 |     9     4    15 |     5     7    21 |    10     8    16 |
grg | grg 2965 |     7     4    17 |     6     7    25 |    10     8    24 |
igr | igr 2960 |     8     3    14 |     5     6    20 |     9     7    19 |
igs | igs 2965 |     8     3    15 |     5     6    21 |     9     7    18 |
jpl | jpl 2976 |     8     6    24 |     5     7    24 |    10    10    22 |
mit | mit 2976 |     7     4    16 |     6     7    27 |    10     8    22 |

Table 5.1961.6   GPS week: 1961   Day: 6   MJD: 57977.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10     9    18 |     5     6    21 |     9     9    18 |
emr | emr 2976 |    10     9    22 |     6     8    23 |     9    12    23 |
esa | esa 2976 |    10     9    18 |     5     7    22 |     9     9    19 |
gfz | gfz 2973 |    10     9    18 |     5     6    21 |     9     7    17 |
grg | grg 2976 |    10    10    18 |     6     8    23 |    10     9    19 |
igr | igr 2976 |    11     9    18 |     5     6    19 |     9     8    18 |
igs | igs 2976 |    10     9    18 |     5     6    20 |     9     8    18 |
jpl | jpl 3072 |    11     9    19 |     6     8    23 |    10    12    21 |
mit | mit 2976 |    10     9    16 |     7     6    24 |    10    11    22 |


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 6.1961   GPS week: 1961   MJD: 57971.500-57977.500

                                                         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      -9      71     166     -3 |      22     30
            |      22      15      50     119      5 |       4
emr   uuuuu |      -7     -11     -25    -102      1 |      16     31
            |      14      19      81      75     19 |       8
esa   uuuuu |       3       8      20     102     -2 |      27     34
            |       9      12      30      51      3 |       4
gfz   uuuuu |     -13      13     133     -91      2 |      34     39
            |      13      16      25      79      9 |       3
grg   uuuuu |      13     -22     -24       8     -3 |       4     20
            |      22      18      22      75      3 |       4
igr   xxxxx |       2      18      34     -51     -2 |      -2     19
            |      12       8      55      30      2 |       4
irf   xxxxx |       1     -17     -16     -66      8 |      -6     22
            |      11       8      19      23      5 |       4
jpl   xxxxx |      25     -20       3      39      1 |      33     38
            |      37      42      69      33      8 |       3
mit   uuuuu |      -1     -14     -49    -148      5 |      27     34
            |      26      16      24      66      3 |       4
ngs   uuuuu |     -15      -2      33    -116      1 |      23     30
            |      30      20      62      78     11 |       3
sio   uuuux |      34      17    -229      88      7 |      53     57
            |      12      10      61      51     10 |       4


Table 7.1961.0   GPS week: 1961   Day: 0   MJD: 57971.500

                                                         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     -44     104     191      2 |      29     32
emr   uuuuu |       2       0      28    -159    -27 |      31     38
esa   uuuuu |      15      18       7     140     -4 |      33     36
gfz   uuuuu |     -37      16     123    -230     16 |      36     39
grg   uuuuu |      -9       4     -55    -103     -1 |      10     18
igr   xxxxx |       2      11      62     -61      0 |       4     14
irf   xxxxx |      11     -33      11     -75      1 |       0     18
jpl   xxxxx |      45     -33     -10      49      3 |      37     41
mit   uuuuu |      30     -37      -7     -81     -1 |      33     37
ngs   uuuuu |     -31       7      56     -64     13 |      24     30
sio   uuuux |      52      23    -285      58     -5 |      59     61

Table 7.1961.1   GPS week: 1961   Day: 1   MJD: 57972.500

                                                         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 |      10      -2      20      25     -3 |      25     31
emr   uuuuu |      10     -38      41       8    -12 |      23     36
esa   uuuuu |      -7      27      -8      19      0 |      29     35
gfz   uuuuu |     -10      36     115    -126     -1 |      35     39
grg   uuuuu |      -8     -46     -15      -4     -2 |       7     19
igr   xxxxx |      -5      21      90     -72      0 |       1     16
irf   xxxxx |       7     -18       7     -62      8 |      -5     20
jpl   xxxxx |      26     -75      78      23     11 |      34     39
mit   uuuuu |      16     -29     -47     -98      5 |      29     35
ngs   uuuuu |     -35     -14      50      31     11 |      22     29
sio   uuuux |      45      10    -177      99      3 |      55     58

Table 7.1961.2   GPS week: 1961   Day: 2   MJD: 57973.500

                                                         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      -5      82     253     -6 |      21     31
emr   uuuuu |     -16      -6     -72    -176     -8 |      15     34
esa   uuuuu |      12      -4      21      81      0 |      25     34
gfz   uuuuu |       6      -5     117     -21      8 |      31     38
grg   uuuuu |      27     -41     -12      30     -7 |       3     23
igr   xxxxx |       2      14      42     -12     -2 |      -3     22
irf   xxxxx |       5      -7     -36     -69     15 |      -9     24
jpl   xxxxx |      74     -76     -45      52      7 |      32     38
mit   uuuuu |       3     -20     -78    -156      9 |      25     34
ngs   uuuuu |     -52      27     107    -188     10 |      20     29
sio   uuuux |      33      16    -288     110      4 |      51     56

Table 7.1961.3   GPS week: 1961   Day: 3   MJD: 57974.500

                                                         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      -5      40     190     -4 |      18     26
emr   uuuuu |       4     -21      31    -173      1 |       9     26
esa   uuuuu |      12      12      34      89      2 |      22     31
gfz   uuuuu |      -7      -5     176     -94      6 |      30     36
grg   uuuuu |      34     -10      14     -45     -4 |      -1     20
igr   xxxxx |      14      17      87     -33     -1 |      -6     20
irf   xxxxx |       8     -18     -11     -47     12 |     -11     22
jpl   xxxxx |      58      11      48      20    -14 |      29     35
mit   uuuuu |      27     -14     -63    -106      3 |      22     29
ngs   uuuuu |     -30      11     -81    -115      3 |      19     28
sio   uuuux |      32       9    -151     129     -4 |      48     52

Table 7.1961.4   GPS week: 1961   Day: 4   MJD: 57975.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -21      -1     139     115      5 |      17     26
emr   uuuuu |     -20      15     -71    -130      6 |       8     25
esa   uuuuu |       2       7      -8     167     -3 |      23     32
gfz   uuuuu |     -10       2     121    -124     -3 |      31     38
grg   uuuuu |      44     -27     -37     122     -6 |      -1     20
igr   xxxxx |      20      34     -61     -56     -2 |      -6     20
irf   xxxxx |       7     -16     -37     -52     12 |     -10     23
jpl   xxxxx |      20      11    -122     102      3 |      29     34
mit   uuuuu |     -25      -3     -61    -164      5 |      23     30
ngs   uuuuu |      12      -7      24    -151     -2 |      21     29
sio   uuuux |      33       7    -231     108     13 |      48     51

Table 7.1961.5   GPS week: 1961   Day: 5   MJD: 57976.500

                                                         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       0       5      33    -11 |      22     30
emr   uuuuu |      -3       1      39     -43     32 |      12     27
esa   uuuuu |      -8       6      15     144     -7 |      27     35
gfz   uuuuu |     -19      26     161     -42     -6 |      36     41
grg   uuuuu |      11      -9     -31      77     -6 |       3     20
igr   xxxxx |      -5      15     -14     -25     -6 |      -2     19
irf   xxxxx |     -16     -14     -27     -44      5 |      -3     21
jpl   xxxxx |     -16      26      47       3     -4 |      34     38
mit   uuuuu |     -28       0     -58    -152      7 |      28     34
ngs   uuuuu |      30     -36      -6    -140    -14 |      25     32
sio   uuuux |      28      23    -174     126     14 |      53     57

Table 7.1961.6   GPS week: 1961   Day: 6   MJD: 57977.500

                                                         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 |      36      -9     105     356     -4 |      23     31
emr   uuuuu |     -26     -28    -168     -44     14 |      15     33
esa   uuuuu |      -1      -9      77      72     -2 |      28     35
gfz   uuuuu |     -15      22     120       2     -8 |      37     43
grg   uuuuu |      -7     -25     -32     -19      1 |       4     21
igr   xxxxx |     -16      12      32    -101      0 |      -1     20
irf   xxxxx |     -14     -15     -17    -111      3 |      -1     23
jpl   xxxxx |     -28      -2      25      20      2 |      36     40
mit   uuuuu |     -27       6     -31    -278      6 |      30     37
ngs   uuuuu |       4      -2      79    -185    -11 |      27     33
sio   uuuux |      13      33    -294     -15     24 |      56     60



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