[IGSREPORT-29270] Wk 2255 IGS Final Orbits

acc acc at igs.org
Sun Apr 16 23:38:24 UTC 2023


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2255   (Mar 26, 2023 - Apr 01, 2023)

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:

IGS0OPSFIN_${yyyy}${doy}0000_01D_15M_ORB.SP3  IGS GPS ephemeris files in SP3
                                              format.
IGS0OPSFIN_${yyyy}${doy}0000_01D_05M_CLK.CLK  IGS GPS satellite and station
                                              clocks in clock RINEX format.
IGS0OPSFIN_${yyyy}${doy}0000_01D_01D_CLS.SUM  IGS GPS clock combination summary
                                              report.
IGS0OPSFIN_${yyyy}${doy}0000_07D_01D_ERP.ERP  Earth Rotation Parameters (ERP)
                                              and their rates as well as
                                              Universal Time (UT1-UTC) and
                                              Length Of Day (LOD) associated 
                                              with IGS ephemerides.
IGS0OPSFIN_20230850000_07D_01D_SUM.SUM        Complete report.

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

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, GRG, 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.
    

 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   | CPVG MAYG
                0  |  ESA   | HRAO NRMD
                0  |  GFZ   | 13
                0  |  GRG   | 13 13 JFNG SEYG CZTG FAA1 HRAO HYDE JFNG SEYG
                0  |  MIT   | 22
                1  |  COD   | GAMB HYDE SCUB SGOC ULAB
                1  |  GFZ   | 21 21
                1  |  GRG   | JFNG SEYG JFNG SEYG SVTL
                2  |  COD   | KOKB SCUB
                2  |  ESA   | SCUB AREQ NRMD SCUB
                2  |  GFZ   | 5 5 ASCG AREQ ASCG PTVL
                2  |  GRG   | 13 13 AREQ CZTG CZTG KIRI SVTL
                3  |  COD   | HYDE NNOR
                3  |  ESA   | PIE1
                3  |  GRG   | CZTG PIE1 CZTG SVTL
                3  |  JPL   | YAR2
                4  |  COD   | SCUB
                4  |  ESA   | HRAO NRMD SCUB HRAO NRMD SCUB
                4  |  GFZ   | TASH
                4  |  GRG   | 13 13 CZTG CZTG SGOC SVTL
                5  |  COD   | CZTG SEYG
                5  |  ESA   | YEL2
                5  |  GFZ   | 13
                5  |  GRG   | 13 13 SEYG FLIN KIRI SEYG
                6  |  ESA   | NRMD CPVG MAL2 MAW1 NRMD
                6  |  GFZ   | 13
                6  |  GRG   | 13 21 13 21 CPVG CPVG HYDE SVTL
                6  |  MIT   | 20

 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 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.
    
    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.
    
    Starting 17-May-2020 (GPS Week 2106, day 0, MJD 58986) all IGS products,
    are based on the updated reference frame (IGb14).
    For more information see IGSMAIL #7921.
    
    Starting 28-Nov-2022, all IGS products, are based on the IGS realization of
    the ITRF2020 reference frame (IGS20). Starting from the same date, the IGS
    products are based on the repro3 standards, including long filename formats.
    For more information see IGSMAIL #8238, #8256, #8274 and #8282.
    

 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 |     .4     .7     .0      -2      3    -13     .14
       ESA  |   0 |     .3     .9   -1.1     -12    -13     -1    -.18
       GFZ  |   0 |     .2    -.0    -.8      -1      4      9     .45
       GRG  |   0 |     .9    -.1    -.8      21     -8      3     .08
       JPL  |   0 |    4.2   -2.1   -1.8       5     51    -62     .89
       MIT  |   0 |    8.1   -2.7   21.9     -20     -5      4     .31
       NGS  |   0 |    6.2   -8.7   -1.4     -35    -20     28     .35
       SIO  |   0 |    7.8    2.5    1.1       5   -147      7     .29

       COD  |   1 |     .3     .6     .0       4      0     -4     .09
       ESA  |   1 |     .6     .3   -1.4     -14     -2     -7    -.16
       GFZ  |   1 |     .2    -.6    -.8     -39      7     27     .51
       GRG  |   1 |     .4   -1.2   -1.3     -27      0     39    -.03
       JPL  |   1 |    8.0    4.8   -6.7     -10     57    -34    1.01
       MIT  |   1 |    7.5   -4.4   18.3     -10     -4     17     .21
       NGS  |   1 |    1.0   -4.0    -.5     -25     22      5     .35
       SIO  |   1 |    5.0    2.7   -2.5       3   -114      9     .58

       COD  |   2 |    -.1     .5    -.3       2     -6      1     .10
       ESA  |   2 |     .3     .7   -1.3      -3    -12      7    -.16
       GFZ  |   2 |    -.2    -.4    -.3       1     10     15     .39
       GRG  |   2 |     .7     .1    -.5      15     -1     16     .07
       JPL  |   2 |    2.7    4.6     .3     -21     52    -20     .56
       MIT  |   2 |    4.5   -1.4   23.6       9     -3     -4     .16
       NGS  |   2 |    -.2    4.7    9.5      -2     16     -8     .22
       SIO  |   2 |    4.4    3.8    -.6      62    -87      8     .26

       COD  |   3 |    -.2     .5    -.4      15     -3      3     .13
       ESA  |   3 |     .1     .6    -.9       2    -11     14    -.14
       GFZ  |   3 |    -.3     .2    -.4      16     13     -1     .36
       GRG  |   3 |    1.3    -.0   -1.0      19    -18      7     .10
       JPL  |   3 |    3.2     .3    1.4     -10     53    -33     .77
       MIT  |   3 |    8.1   -2.6   22.8       0    -18     20     .27
       NGS  |   3 |   -4.4    5.0   -1.6      27     29    -34     .29
       SIO  |   3 |    2.0    4.1   -2.4      62    -44     40     .36

       COD  |   4 |     .1     .5     .1      13     -3      3     .14
       ESA  |   4 |     .9     .8    -.6       6     -4     -9    -.22
       GFZ  |   4 |     .0     .2    -.2     -11      9      4     .40
       GRG  |   4 |     .9     .1   -1.2      28     -4     10    -.02
       JPL  |   4 |     .4   -3.9    3.8       0     45    -37     .46
       MIT  |   4 |    7.2   -4.3   23.8     -14    -19     11     .16
       NGS  |   4 |    2.6   -6.9    3.2     -34     -6      1     .22
       SIO  |   4 |    3.0    7.3   -2.9     117    -93     53    -.05

       COD  |   5 |     .4     .4     .1      15     -6      7     .14
       ESA  |   5 |    1.2     .1    -.7       2     -9      7    -.24
       GFZ  |   5 |     .3    -.8    -.7     -10      1     27     .56
       GRG  |   5 |     .8    -.7   -1.3      -3     -7     29     .16
       JPL  |   5 |     .4   -1.0   -2.5       6     58    -12     .85
       MIT  |   5 |    6.1    -.1   16.3     -10    -16     24     .42
       NGS  |   5 |    2.7     .3     .3       2     -6    -18     .37
       SIO  |   5 |    3.6    3.8   -2.5      67    -92     68     .20

       COD  |   6 |     .2     .2     .3      11      0      5     .19
       ESA  |   6 |     .0     .6    -.9      11    -11     19    -.07
       GFZ  |   6 |     .1    -.3    -.4     -24     10     11     .47
       GRG  |   6 |     .8    -.4   -1.3      -6     -5     21     .30
       JPL  |   6 |    -.1    2.9     .3      12     60     -9     .90
       MIT  |   6 |   11.4    3.2   21.3       8      1     17     .32
       NGS  |   6 |    6.5     .4    4.9       0    -18     35     .51
       SIO  |   6 |    5.0    9.0    2.5     136    -99     34     .32


 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:
        https://files.igs.org/pub/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:
        https://files.igs.org/pub/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
        https://files.igs.org/pub/station/general/igs14.atx
    
    Starting 28-Nov-2022, the absolute antenna model file has been updated to
    igs20.atx to be consistent with IGS20.
    See IGSMAIL #8238 and #8256 for more information
        https://files.igs.org/pub/station/general/igs20.atx
    
    The JPL solution did not use IGS20/igs20.atx until GPS Week TBA, which caused
    their orbit and clock residuals to be higher during that period than for the other
    centres; from GPS Week 2238 through TBA, the JPL solution is excluded from the
    weekly SINEX combination, as well as from orbit and clock combinations.
    


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 1.2255.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2255.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 2.2255.[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 3.2255.[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 5.2255.0-6). 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 2255 summary.                       (Mar 26, 2023 - Apr 01, 2023)

Table 1.2255.a   GPS week: 2255   MJD: 60029.000-60035.000

         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  843|    0     0     0    25   -27     7   .02    9    8 |    -601     106      5     95
        |    0     0     1    14    18    13   .01           |     199     322
esa  150|    0     0     7    16   -19    -3  -.02    9    9 |    -762     433      5     76
        |    0     0     0    14    11    19   .01           |     160     280
gfz  119|    0     0     1    33   -15     1   .14   11   11 |      82     -15     11     93
        |    0     0     2    12     7     9   .04           |      82     200
grg  114|    1    -2    -1     3     9     4  -.01   10    9 |     -67     -13      7    129
        |    0     0     1    17    13     9   .01           |     165     167
igr  n/a|    0     0     0     9   -13     4   .03    5    5 |    1634      67     11     71
        |    0     0     0    23    12    11   .01           |     367     525
jpl  n/a|   -1     0    -2    25   -11    28   .16   24   24 |    -622     117     77    157
        |    0     0     1    14    17    21   .03           |     575     538
mit  361|    0     0    -4   -10   -29   -32  -.02    7    7 |    2190    -190    536  13779
        |    0     0     1    23    25    23   .02           |    9976     964
ngs  275|    0     0    -2    13   -28     0  -.06   11   10 |    -563      20    871   1728
        |    0     0     1    29    20    18   .03           |     204     343
sio  371|    0     0     0   -58   112    32  -.03    9    9 |     ---     ---    ---    ---
        |    0     0     1    68    52    21   .01           |     ---     ---


Table 1.2255.b   GPS week : 2255   MJD: 60029.000-60035.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         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 2.2255.0   GPS week: 2255   Day: 0   MJD: 60029.000                            

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  848|    0     0     0    29   -32     8   .03    8    8 |    -704     263      5     87
esa  150|    0    -1     7    13   -36   -15  -.00    9    9 |    -589     143      6     77
gfz  117|    0     0     3    24   -20     7   .06   11   11 |     145    -160     12     91
grg  116|    0    -3     0    -8    -4    -4   .01   10   10 |      36    -248      7    121
igr  n/a|    0     0    -1    23    -9     6   .02    4    4 |    1206    -218     11     71
jpl  n/a|    0     0    -3    20   -34    20   .14   24   24 |   -1321     232     82    160
mit  361|    0     1    -5    33   -48   -11   .01    8    8 |  -14178    -151     63  13858
ngs  278|    1     0    -4     0   -48     0  -.06   10    9 |    -643     116    867   1770
sio  373|    0     0     0   -99   187     6  -.03    9    9 |     ---     ---    ---    ---

Table 2.2255.1   GPS week: 2255   Day: 1   MJD: 60030.000                            

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  855|    0     0    -1    51   -51    -2   .03    9    8 |    -605     203      5    105
esa  150|    0     0     8    43   -28   -18  -.02    9    9 |    -800     531      5     66
gfz  120|    0     2     1    55   -24     4   .17   11   10 |     -70    -180     12     85
grg  116|    1    -3    -2    35    -4     0   .00   10   10 |    -365     212      7    144
igr  n/a|    0     1    -1    54   -36     2   .03    5    5 |    1265     341     12     67
jpl  n/a|    0     0    -2    57   -11    12   .17   24   24 |    -838     358     79    165
mit  361|    0     0    -5   -26   -37    -6  -.03    8    7 |   11116     204     71   7958
ngs  278|    0     0    -2    15   -40    -4  -.03   13   11 |    -601     197   1069   2047
sio  371|    0     0     0  -133   170    23  -.04    8    8 |     ---     ---    ---    ---

Table 2.2255.2   GPS week: 2255   Day: 2   MJD: 60031.000                            

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  855|    0     0    -1     7   -14    26   .03   10    9 |    -256    -486      6     95
esa  150|    0    -1     8    15   -23    17  -.01    9    9 |    -526     -38      6     69
gfz  119|    0     0     2    30   -18    11   .14   11   10 |     136      52     12     89
grg  113|    1    -2     0     2    17    15  -.02   10   10 |      62    -139      7    123
igr  n/a|    0     0     0     1   -12    23   .03    6    5 |    1988    -186     13     75
jpl  n/a|   -1     2    -1    22     4    57   .18   24   24 |    -195    -164     78    166
mit  361|    0     0    -6    -2   -38   -65  -.02    7    7 |    6213   -2242   3257  16208
ngs  271|    0     1     0    49   -31     5  -.07   11   10 |    -306    -418    751   1635
sio  370|    0     1    -1   -87   115    15  -.05    9    8 |     ---     ---    ---    ---

Table 2.2255.3   GPS week: 2255   Day: 3   MJD: 60032.000                            

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  844|    0     0     0    28   -12    21   .04    9    8 |    -433    -140      5     95
esa  150|    0     0     6     4    -9    14  -.02    9    9 |    -878     439      6     98
gfz  115|    0     0     4    41    -1   -17   .17   11   11 |     113    -240     11    103
grg  110|    1    -1     0    17     0    15   .00   11    9 |    -200     186      7    134
igr  n/a|    0     0     0     0    -2    -1   .03    5    5 |    1529     574     12     83
jpl  n/a|   -2     0     0    24    17    27   .14   24   24 |    -702     125     77    161
mit  361|    0     0    -5   -19   -36   -44  -.01    8    7 |    -315     305    142  12886
ngs  266|    0     1    -3    58   -33   -26  -.11   11   10 |    -449    -146   1080   1920
sio  372|    0     0     0   -96   109    23  -.04   10    8 |     ---     ---    ---    ---

Table 2.2255.4   GPS week: 2255   Day: 4   MJD: 60033.000                            

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  836|    0     0     1    16   -11    -7   .03    9    8 |    -785     286      6     93
esa  150|    0     0     8    16   -12   -27  -.04    9    9 |    -993     735      6     71
gfz  123|    0     0    -1    24   -10    -5   .14   11   10 |      89     221     12     83
grg  111|    1    -3    -4    -1    13     0  -.03    9    8 |      87     -45      7    124
igr  n/a|   -1     1     0     0   -23    -1   .03    6    6 |    2199    -771     11     75
jpl  n/a|   -2     0    -1    23   -20    17   .19   24   24 |    -486    -815     76    152
mit  361|    1     0    -3   -26   -20   -30  -.00    8    7 |   11584    -342     69  13407
ngs  278|   -1     0    -1    -5   -38    13  -.04   11    9 |    -785     290    735   1570
sio  370|    0     1     1   -14    68    63  -.02    9    9 |     ---     ---    ---    ---

Table 2.2255.5   GPS week: 2255   Day: 5   MJD: 60034.000                            

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  831|    0     0     1    27   -13    -3   .02    9    8 |    -819     486      5    100
esa  150|   -1     0     7    23    -5   -14  -.02    9    9 |    -791     587      6     80
gfz  124|   -1     0     0    38   -15     7   .16   11   10 |      13     266     11    103
grg  115|    1    -2    -1    -5    30    -6  -.02   10    9 |       4     -78      9    126
igr  n/a|   -1     0     0     4    -5    -9   .01    5    5 |    1494     -23     11     64
jpl  n/a|   -2     1    -2    21   -15     7   .11   24   24 |   -1167     122     72    138
mit  361|    0     1    -3     2   -50   -12  -.03    7    6 |   -7694     183     72  11823
ngs  282|    0     1    -3   -18   -17   -20  -.07    9    9 |    -819     484    989   1636
sio  373|    0     0     0   -53    92    55  -.02    9    8 |     ---     ---    ---    ---

Table 2.2255.6   GPS week: 2255   Day: 6   MJD: 60035.000                            

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  833|    0     1     0    19   -54    13  -.01    9    8 |    -610     131      5     91
esa  150|    0     0     5    -1   -21    17  -.03    9    9 |    -761     636      5     73
gfz  121|    0     0     3    19   -14     1   .18   12   11 |     150     -67     12     97
grg  117|    0    -1    -2   -13    17     8  -.01    8    7 |     -98      16      7    135
igr  n/a|    0     0     0   -16    -1    13   .04    5    5 |    1763     753     11     68
jpl  n/a|   -2     0    -4    10   -21    59   .17   23   24 |     353     967     78    157
mit  361|    0     1    -2   -33    24   -55  -.04    7    7 |    8607     708     79  20313
ngs  272|    0     0     0    -4    11    25  -.03   12   10 |    -340    -379    611   1523
sio  372|    0     0     0    71    41    40  -.02   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 3.2255.0   GPS week: 2255   Day: 0   MJD: 60029.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1E |    6    5   17   10    5   12   10   11    8    4 |    19   21   20   18   20   21   22   23   32    19
   2E |   11   11   11    9    4   15    6    8    7    3 |    34   26   29   31   27   33   29   29   38    28
   3  |    8   10    8    6    3   11    7    7    9    3 |    27   29   25   26   26   32   26   25   36    26
   4  |   17   11    8    9    5   49    9    7   11    4 |    69   73   70   70   69   84   69   67   72    69
   5  |    7    9    9    8    4   10    8    9   10    3 |    42   39   40   40   42   42   40   42   52    41
   6E |    8    7    9    8    4    9    6   13    8    3 |    36   34   36   35   36   37   37   32   45    35
   7E |   12    6   10    8    5   14    6   12   10    4 |    28   25   28   31   27   29   30   33   35    28
   8  |    8    9    7   12    4   12    6   11   10    3 |    19   24   19   22   20   22   21   25   30    20
   9  |    8    9   11    6    4   12    7    8   11    3 |    34   35   31   32   32   34   32   30   39    31
  10  |    7    9   13    7    5   10   11    6   12    4 |    85   85   85   83   86   86   88   84   94    85
  11E |    7   14   12   13    4   61    9   15    9    4 |    72   73   73   73   72   77   73   69   79    72
  12  |    7    7    6   12    5   11    6    8    6    3 |    58   61   60   61   59   60   56   57   62    58
  13  |    8    6   10   11    6   12    8    9   11    3 |    22   26   22   28   25   29   26   26   39    25
  14  |    6    7    9    7    5   48    5   12    8    3 |    33   34   34   35   33   48   34   33   47    34
  15  |    7    6    9   20    5    9   11   11   10    4 |    36   37   40   38   37   38   38   37   44    36
  16  |   10    4    9    9    5   13    7    7    9    3 |    21   20   22   17   20   22   18   19   26    18
  17  |    5    7   11    9    4   12    7   10    6    3 |    28   28   30   31   31   35   27   29   37    28
  18E |    9   16   12   11    4   58   10   12   11    4 |    64   66   63   64   63   73   64   62   64    62
  19  |    6    6   10    8    3   10    9   12    8    3 |    40   40   42   42   41   42   39   34   47    39
  20  |    8    8   11    7    5    8    5   11    9    3 |    32   29   30   29   30   32   30   29   39    29
  21E |    7   11    9    7    4    9    7   11    5    3 |    34   27   33   34   29   29   32   37   41    32
 X22  |    9  ---   13    7    7   14    6    9  ---    4 |    30  ---   34   33   31   34   31   29  ---    31
  23  |    9    5   13    7    4   53    7    9   11    3 |    31   31   35   34   32   28   34   34   41    32
  24E |    8   13   17   18    5    9   10   11   12    5 |   106  107  108  105  104   97  105  100  106   104
  25  |    6   11    7   10    3    9    8    8    5    3 |    28   32   30   28   27   32   23   26   36    27
  26  |    9    8   13    8    4   11    5    9    9    3 |    34   30   35   28   29   33   27   23   33    28
  27  |    8    8    9   10    4   11    7   10   10    3 |    23   24   18   22   20   25   22   24   29    21
 X28E |    9   16  ---   18    6   57    7   12    6    5 |    90   91  ---   92   90   91   94   90   92    91
  29  |    6   10   11   14    4   14    6    8    8    3 |    33   30   31   28   30   32   33   31   36    30
  30E |   10   10   16   11    4   13    6    8    9    4 |    39   41   48   39   40   43   42   42   48    41
  31E |    8    6   11   10    6   13    7   12    6    3 |    27   27   26   29   27   26   25   29   36    26
  32  |    7    8   10    7    4   10   10    7    7    3 |    26   28   26   26   26   28   23   27   34    25
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    8    9   11   10    4   24    8   10    9      |T   40   41   39   40   40   42   40   39   48    39
 WRMS |    8    9   11   10    4   24    8    9    9      |NE  35   36   36   35   35   38   35   34   43    34
 MEDI |    8    8   10    9    4   12    7    9    9      |MD  33   31   33   32   31   33   32   31   39    31

Table 3.2255.1   GPS week: 2255   Day: 1   MJD: 60030.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1E |    6    6    7   12    4   10    9   13    6    3 |    21   23   22   21   21   23   24   23   32    21
   2E |   12    7   13    7    4   15    5   12    8    3 |    35   27   28   32   28   34   30   37   38    30
   3  |    8    9    9    8    3   13    9    9    7    3 |    27   31   27   25   29   32   30   26   33    27
   4  |   12    9    8    8    6   48    9   11    9    4 |    60   60   58   59   58   64   58   54   60    58
   5  |    9   10    9    9    5    9    6   19    9    4 |    29   25   30   25   28   28   30   31   42    28
   6E |   10    7   12    7    4   13    5   10    8    3 |    36   36   36   36   36   37   37   32   44    35
   7E |   11    7   11    9    4   12    7    7    9    3 |    25   24   29   26   25   25   29   27   36    26
   8  |    6    9   11   12    5   14    5    9    7    3 |    23   27   24   23   24   28   24   24   34    24
   9  |    8    8   11    6    4   11    7    7    9    3 |    35   36   33   34   32   35   33   29   39    33
  10  |    7   10    9    8    4   13   10    9   10    4 |    57   55   57   54   56   58   60   56   66    57
  11E |   10   14    8   12    5   62    7   17    9    4 |    60   63   62   61   60   65   63   55   67    61
  12  |    8    6   11   11    5    9    7   12    6    3 |    38   39   41   36   40   40   37   44   40    38
  13  |    9    7   12   11    6   13    8   18   12    4 |    21   24   26   23   24   30   24   29   32    23
  14  |    7    6    8    7    5   51    5   13    7    3 |    33   30   35   33   30   39   32   26   43    32
  15  |    9    8   10    7    7   13   10   13   10    4 |    32   31   37   32   34   34   34   36   38    32
  16  |    8    5    9   10    7   12    7   14    9    3 |    19   19   20   18   19   19   18   19   28    18
  17  |    6    6   10    9    5   11    7   14    6    3 |    28   27   32   29   30   34   27   28   38    28
  18E |   11   16   10   12    5   58   11   17   10    5 |    56   60   59   58   57   62   57   57   60    57
  19  |    7    5   12    7    4   11    7   11    7    3 |    35   36   40   35   36   34   35   40   42    36
  20  |   11    7   11    8    6   10    6   14    9    3 |    34   31   34   30   33   32   33   32   40    32
  21E |    8   11   11    9    5   14    7   18    7    4 |    34   29   31   33   30   32   33   38   43    33
 X22  |   11  ---   11    8    5    9    7   16  ---    5 |    24  ---   26   24   23   26   27   28  ---    25
  23  |    9    7   11    6    5   50    9   13   11    4 |    31   32   36   32   31   27   34   34   38    32
  24E |    8   13   27   20    6   11   13   15   11    6 |    83   86   90   85   84   73   83   87   86    84
  25  |    6   10   10    9    5    9    7    7    8    3 |    26   31   26   24   26   31   26   27   30    26
  26  |    7   10   12    6    4   15    5   11    6    3 |    28   27   32   26   26   28   26   27   36    27
  27  |   10    8   14   12    5   12    5   11    8    4 |    25   27   24   22   24   29   24   25   29    23
 X28E |    9   16  ---   17    6   57    8   16    7    5 |    75   74  ---   76   75   75   76   78   75    74
  29  |    6    8    9   11    5   14    6    9    7    3 |    33   30   32   31   31   33   32   34   36    31
  30E |    9   10   15   12    4   10    5    9    7    4 |    39   41   46   39   41   41   39   40   47    40
  31E |    7    7   10   12    4   12    8   12    5    3 |    21   20   21   23   21   21   25   21   32    22
  32  |    7    8    8    7    4    9    6   10    8    3 |    26   30   29   28   29   32   26   32   36    27
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    9    9   11   10    5   24    7   13    8      |T   35   36   36   35   35   37   36   36   43    35
 WRMS |    8    9   10   10    5   24    7   10    8      |NE  31   32   33   30   31   33   31   32   39    31
 MEDI |    8    8   11    9    5   12    7   12    8      |MD  32   31   32   31   30   32   32   32   38    31

Table 3.2255.2   GPS week: 2255   Day: 2   MJD: 60031.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1E |   10    6    9   11    3   11    6    7    9    3 |    17   18   21   20   17   18   18   19   25    17
   2E |   13    6   12    7    5   18    4    8    9    3 |    29   21   22   24   22   28   25   24   29    23
   3  |    9   10    6    7    4    9    7    7    9    3 |    20   23   21   20   21   25   19   17   25    19
   4  |   15    8    9    8    6   46    8   13    7    4 |    50   54   53   52   53   64   51   56   57    52
   5  |    8    9    8    8    6    9    7    9   10    3 |    33   28   32   31   32   34   33   31   38    31
   6E |   11    7   12    9    4   11    5   12    5    3 |    21   21   20   21   20   21   19   21   27    19
   7E |   14    6   10    9    6   14    8   10   10    4 |    25   23   27   25   25   26   28   26   32    25
   8  |    9    9   10   13    6   10    6   11   10    4 |    20   24   20   22   21   25   20   23   28    20
   9  |    8    8   12    6    5   12    7   10    7    3 |    25   27   23   23   25   27   22   26   30    23
  10  |    8   11   13    7    5   13    8    7   10    4 |    88   89   90   87   88   90   90   91   91    89
  11E |   11   15   11   12    6   62    6   14    6    4 |    28   34   31   31   29   36   29   30   36    29
  12  |    7    9    8    9    5   14    7   10    6    3 |    41   42   47   44   43   45   40   41   44    42
  13  |   11    8   12   13    9   15    9   15   15    4 |    20   22   24   26   22   30   23   24   29    22
  14  |    8    8    7    8    5   51    6   12    8    3 |    23   27   23   27   24   37   24   26   30    24
  15  |   10    7   10    9    8   11    7   13   12    4 |    29   27   30   24   28   32   29   25   31    26
  16  |    9    5    8    9    7   11    7   10    7    3 |    19   18   20   18   18   19   16   20   23    17
  17  |    4    7    9    8    5   11    7    9    8    3 |    24   24   28   25   25   30   23   21   27    23
  18E |   15   14   13   12    6   55   13   18   12    5 |    30   36   37   32   31   39   31   29   34    30
  19  |    6    8   10    7    4   11    7   11    7    3 |    24   26   27   27   26   28   25   26   29    24
  20  |   11    7    8    8    5   11    6   11   10    3 |    31   27   29   25   28   32   27   28   36    27
  21E |    9   11   10   12    5   10    5   12   11    4 |    30   24   27   29   26   26   30   32   36    28
 X22  |   12  ---   16    5    8   13    5   15  ---    5 |    32  ---   33   31   29   31   31   26  ---    30
  23  |   11    6   17    8    6   50    7   13   10    4 |    16   18   26   21   17   16   19   16   24    17
  24E |   15   14   24   20   10   17   15   15   14    7 |    56   56   62   61   57   82   54   56   55    55
  25  |    8   10   11    8    4   11    8    9    6    3 |    22   28   24   24   23   29   22   23   25    22
  26  |    8    9   10    7    4   11    4   10    8    3 |    32   31   33   30   29   32   27   27   33    29
  27  |   20    9   10   13    6   11    7   13    8    4 |    28   24   18   22   20   25   20   25   27    21
 X28E |   13   17  ---   20    7   53    9   18   10    6 |    51   51  ---   51   48   51   50   50   52    49
  29  |    7    7    7   11    5   14    5   12    8    3 |    21   18   20   20   19   23   21   23   24    19
  30E |   12   11   15   14    7   13    5   13    9    4 |    25   28   26   24   25   30   24   29   29    24
  31E |    9    6    9   11    4   12    8   13    6    3 |    30   29   30   30   29   30   30   29   32    29
  32  |    7    7   11    5    4   10    8    7    6    3 |    19   22   23   20   20   22   18   20   25    19
------+---------------------------------------------------+----------------------------------------------------
 RMS  |   10    9   11   10    6   24    7   11    9      |T   29   30   30   30   29   33   29   30   34    28
 WRMS |    9    9   10   10    5   24    7   10    8      |NE  29   29   30   29   29   33   28   29   33    28
 MEDI |    9    8   10    9    5   12    7   11    9      |MD  25   27   27   25   25   30   25   26   30    24

Table 3.2255.3   GPS week: 2255   Day: 3   MJD: 60032.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1E |    7    6    7   10    3   12    8   11    7    3 |    19   19   18   19   18   21   18   20   23    17
   2E |   12    9   12    9    4   18    9    9   11    4 |    29   25   24   27   24   31   27   26   25    25
   3  |    7    9   12    8    3    9    7   11    7    3 |    26   26   25   22   25   27   22   27   25    23
   4  |   13    9   13    6    7   50    8   12    8    4 |    29   34   30   29   30   51   31   27   34    29
   5  |    6    8    9    8    4    9    7    9    8    3 |    30   30   32   29   30   33   30   33   34    30
   6E |    8    7    9    7    3    9    4    9    6    3 |    19   19   17   20   17   18   16   18   25    17
   7E |   11    6   10   11    6   14    8    8   15    4 |    27   20   24   25   23   27   24   25   30    23
   8  |    7    8    9   11    5   12    6   13    9    3 |    20   23   16   22   19   26   19   22   27    19
   9  |    8    8   12    8    4   10    7    8    7    3 |    20   23   21   19   21   23   21   19   27    20
  10  |   10   12   11    8    4   14    9   10   13    4 |    59   63   63   64   62   65   62   63   62    61
  11E |   10   14   11   11    2   59    5   14    8    4 |    17   26   27   24   18   30   20   16   26    20
  12  |    8    7   10   11    4   12    7   15    6    3 |    44   43   50   44   42   43   39   44   43    43
  13  |   11    6    9   11    7   13    8   12   13    4 |    21   24   26   27   25   31   24   28   29    24
  14  |    7    8    7    8    5   53    6   10    5    3 |    13   19   17   19   15   34   18   17   22    16
  15  |   11    7   10   10    5   12    7   12   11    4 |    35   33   33   28   32   37   34   29   36    32
  16  |    7    7    9    8    6   14    6   13   10    3 |    19   18   21   16   17   18   16   17   19    16
  17  |    5    5   10    7    5   12    7   11    5    3 |    23   19   25   23   24   29   20   24   26    21
  18E |   10   16   12   12    4   54   12   13   13    5 |    21   29   30   25   23   33   26   22   29    23
  19  |    4    6   18    7    4   12    7   10    7    3 |    22   22   30   23   23   25   22   21   25    22
  20  |    8    6   11    8    5    9    7   11    8    3 |    25   24   26   20   24   23   26   24   31    24
  21E |   10   10    6    7    4    8    6   10    7    3 |    29   23   26   29   25   25   27   31   33    27
 X22  |    9  ---   12    8    8   10    7    9  ---    4 |    22  ---   25   23   20   23   24   23  ---    22
  23  |    9    9   16    6    4   47    6    8   12    4 |    10   15   24   16   12   13   15   10   25    14
  24E |   11   14   16   29    9  ---   16   18   18    7 |   104  100  101  107   98  ---   97   99   97   100
  25  |    6   10   16    9    5   10   10   13    7    4 |    21   26   28   23   21   28   21   23   25    21
  26  |    6    8   11    6    4   10    6   11    7    3 |    26   27   30   25   26   28   24   21   29    25
  27  |    7   10   10   12    5   12    6   10   10    4 |    18   25   19   21   20   24   18   20   26    19
 X28E |   12   17  ---   21    8   55   11   13   12    6 |    37   38  ---   36   36   38   39   37   42    36
  29  |   11    8   11   11    5   10    7   14    7    4 |    23   15   20   19   17   20   18   21   21    17
  30E |   12   12   15   15    9   13   14    8   16    5 |    22   24   19   22   20   23   24   20   28    19
  31E |    7    6    8   13    4   11    7   11    6    3 |    21   17   19   22   19   18   18   21   22    18
  32  |    8    8   13    6    3   11    9    6   10    3 |    16   20   21   18   18   21   17   17   23    16
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    9    9   11   11    5   24    8   11   10      |T   27   28   28   27   26   28   26   27   31    26
 WRMS |    8    9   11    9    5   24    7   10    8      |NE  24   26   27   25   24   29   24   25   29    24
 MEDI |    8    8   11    8    4   12    7   11    8      |MD  22   24   25   23   23   27   22   22   27    22

Table 3.2255.4   GPS week: 2255   Day: 4   MJD: 60033.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1E |    8    7    6    9    5   11    9   11    9    3 |    19   19   18   18   17   19   20   18   21    17
   2E |    8    6   15    9    3   18    5    8   10    3 |    31   25   22   26   24   30   26   29   31    26
   3  |    8   10    7    7    5   12    8    8    8    3 |    18   21   19   18   20   24   19   18   26    18
   4  |   10   10    9    7    7   50    8   13    8    3 |    50   53   51   53   51   58   51   50   53    51
   5  |    6    8   10    6    5   11    6    6    9    3 |    25   21   29   24   25   30   25   26   29    24
   6E |   12    6   12    7    5   10    5   11    7    3 |    26   26   24   25   25   24   25   22   30    24
   7E |   11    6    9    8    7   14   10   16   11    4 |    26   22   26   22   23   26   26   26   30    23
   8  |    7    9    9    7    4   10    4    9    9    3 |    21   23   21   22   20   23   20   18   25    20
   9  |    9    8   12    6    4   14    6    8    8    3 |    27   28   30   26   27   27   26   26   30    26
  10  |   10    9   11    6    6   15    9    5   11    3 |    95   92   92   93   92   95   92   92   93    92
  11E |   10   18   12   11    4   59    7   14    8    4 |    37   42   37   38   36   41   37   33   41    37
  12  |    6    5    5    6    5   12    7   10   10    3 |    35   34   32   35   33   40   33   33   39    34
  13  |   11   10   17   21    9   16    8   13   14    5 |    22   23   27   33   24   31   24   27   29    24
  14  |    9    8    9    7    7   51    6   12    8    3 |    23   26   26   27   25   36   25   25   28    24
  15  |    8    8   10    8    8   15   10    8   10    3 |    34   35   41   34   38   41   35   36   37    35
  16  |    8    5    7    8    7   12    4   10    7    3 |    13   13   17   14   15   16   15   16   18    13
  17  |    5    6    9    7    8   12    8   10    8    3 |    21   22   30   22   25   28   22   21   23    22
  18E |   10   16   10   12    4   54    9   13   10    4 |    38   44   41   38   38   50   37   35   41    38
  19  |    6    7    9    6    7    8    7    9    7    3 |    24   27   30   24   25   25   23   20   24    23
  20  |   10    7   12    7    6    9    7    9   10    3 |    35   34   36   35   36   39   35   35   38    34
  21E |    8   10    8    6    6    9    7   11    6    3 |    35   29   29   33   29   28   32   30   37    31
 X22  |    8  ---   10    7    6   12    6    7  ---    4 |    27  ---   26   23   23   26   25   27  ---    25
  23  |    8    6   12    7    6   48    7   10   11    3 |    17   20   25   22   19   22   23   19   24    20
  24E |   21   14   17   16    7  ---   14   23    9    6 |    95   95   89   92   91  ---   87   86   91    89
  25  |    6    9    8    8    6    9   11    6   14    3 |    22   23   20   20   21   27   21   22   25    20
  26  |    7    9    9    7    6   12    5   10    6    3 |    25   25   26   21   24   26   23   22   26    22
  27  |    8    9    8    8    3   11    5    9    8    3 |    21   23   18   23   20   22   20   19   25    19
 X28E |   13   18  ---   18    8   56   12   10   11    6 |    49   48  ---   48   47   50   50   47   52    47
  29  |    6    7    8    7    5   12    7    7    7    3 |    28   24   27   23   24   29   23   25   27    24
  30E |   13   13   23   11    6   11    7   15   12    5 |    28   29   39   29   29   27   26   30   33    28
  31E |    6    6   10   10    4   12    6    9    8    3 |    26   25   26   28   26   26   27   27   27    26
  32  |    6    8   10    6    3   13    9    7    8    3 |    22   24   23   22   22   26   19   24   23    20
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    9    9   11    9    6   24    8   11    9      |T   31   32   32   31   31   32   31   30   34    30
 WRMS |    8    9   10    8    6   24    7    9    9      |NE  28   29   30   29   29   32   28   28   32    28
 MEDI |    8    8   10    7    6   12    7   10    9      |MD  26   25   27   25   25   27   25   26   29    24

Table 3.2255.5   GPS week: 2255   Day: 5   MJD: 60034.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1E |    7    7    7   10    4   11    7    7    8    3 |    28   29   27   28   27   30   28   27   31    27
   2E |   10    8    9   10    5   16    9    6   10    3 |    41   37   39   40   39   43   39   40   42    38
   3  |    6    9    7    8    4   11    7    7    7    3 |    36   41   36   37   38   41   36   38   43    37
   4  |   11    8    9    7    6   49    9   12    7    3 |    62   64   64   64   62   72   62   64   65    63
   5  |    6    9    8    7    4   11    5    6   10    3 |    31   28   32   29   30   33   29   30   37    29
   6E |    7    7   10   11    6   11    5   10    8    3 |    45   44   44   46   44   44   41   45   49    43
   7E |   12    6   13   12    6   11    7   12    9    4 |    23   20   26   23   21   21   21   23   27    21
   8  |    7    8    8    8    5   10    5   10    8    3 |    30   32   31   30   31   33   28   33   33    29
   9  |    7    8   10    7    4   11    7    6    6    3 |    39   40   39   40   39   43   38   40   39    38
  10  |   15    9   13   19    6   14    8    9   11    5 |   179  179  182  170  178  181  179  184  174   178
  11E |   10   14   10   12    4   59    5   11    6    4 |    67   69   67   67   66   70   67   67   72    67
  12  |    8    5    5    8    5   10    5   11    5    2 |    38   38   38   40   38   40   38   35   41    37
  13  |   11    9   10   13    6   15    9   10   11    4 |    28   29   34   32   32   36   29   32   35    29
  14  |   10    8    6    7    5   51    6   11   10    3 |    37   38   39   40   39   43   37   39   42    37
  15  |    8    8   12    8    7   12    9   10    9    3 |    35   37   39   38   37   42   36   34   39    35
  16  |    9    6    7    9    7   12    6   11    9    3 |    28   26   27   26   26   29   25   29   27    25
  17  |    7    5   11    7    5   12    5    9   10    3 |    38   37   42   40   40   43   35   38   41    37
  18E |    9   16   10   12    4   55    9   12    9    4 |    62   66   63   64   62   67   61   59   65    62
  19  |    5    5   11    6    4   13    5    8    7    2 |    40   40   45   40   41   41   39   42   41    40
  20  |    9    6   10    9    5    9    5    7    9    3 |    26   25   26   22   25   26   22   23   31    23
  21E |    6    9    8   16    5    7    9   11    8    4 |    37   33   32   42   34   35   35   37   41    35
 X22  |   12  ---   11    6    6   11    6   10  ---    4 |    24  ---   32   30   30   32   29   28  ---    28
  23  |    8    5   12    8    4   50    6    9    9    3 |    35   38   40   40   37   33   37   34   42    37
  24E |    8   16   21   18    6   11    8   14    8    5 |   131  131  132  127  130  124  128  125  129   128
  25  |    6   10    8    7    4    9    5    8    6    3 |    29   33   30   30   31   34   27   30   31    29
  26  |    5    8    9    6    4   12    5    8    7    2 |    28   29   31   27   27   30   26   26   31    27
  27  |    7    8    8   10    4   10    6    8    8    3 |    28   30   29   27   28   32   26   30   31    27
 X28E |   15   22  ---   27   10   51   16   14   18    8 |    93   91  ---   96   91   90   93   88   97    91
  29  |    6    8    7    8    5   10    6    9    7    3 |    40   38   40   38   39   40   36   39   38    37
  30E |   13   12   27   12    7   10    7   10   14    5 |    48   50   58   49   50   50   48   51   53    49
  31E |    7    6    9    9    5    8    6   11    8    3 |    19   19   24   20   21   21   19   24   24    19
  32  |    9    8    8    5    3    8    5    8    9    3 |    35   35   34   34   33   35   33   31   38    33
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    9    9   11   10    5   24    7    9    9      |T   45   46   45   46   45   47   44   45   49    44
 WRMS |    8    9   10    9    5   24    6    9    8      |NE  41   42   43   41   41   44   40   41   44    40
 MEDI |    8    8    9    8    5   11    6   10    8      |MD  36   37   38   38   37   40   36   35   41    37

Table 3.2255.6   GPS week: 2255   Day: 6   MJD: 60035.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1E |    7    7   12   10    4   12    7   11   12    3 |    20   20   28   20   20   23   21   17   24    20
   2E |   11    6   13    7    4   14    4   10   12    3 |    31   26   29   28   28   30   29   33   32    28
   3  |    9   10   11   11    6   11   10   12   11    4 |    41   45   44   35   43   46   42   43   38    40
   4  |   11    7    9    6    8   48   10   12   10    3 |    73   76   75   74   73   86   73   74   74    74
   5  |    5    8    7    5    4    9    5    8   10    2 |    34   33   35   33   34   37   35   37   38    34
   6E |   11    8   13    8    6   10    5   14   10    4 |    29   28   25   30   28   29   31   29   33    28
   7E |   12    5   12    8    6   10    8   13   12    4 |    43   38   40   41   39   40   44   41   43    40
   8  |    9    9    9    6    6   12    8   12   11    3 |    22   23   21   21   20   25   19   21   23    20
   9  |    9    7   11    5    3    8    8   10   10    3 |    35   36   34   34   35   39   33   35   35    34
  10  |    7   10   12    6    5   11    8   11   15    4 |   137  136  137  136  138  140  140  142  143   138
  11E |   10   15   11   10    4   56    5   11   10    4 |    61   66   67   65   64   70   67   61   69    64
  12  |    7    5    6    7    4   11    4   10    9    2 |    51   52   53   52   51   54   50   52   53    51
  13  |   10    7   13   10    6   14   10   12   13    4 |    24   24   29   32   27   30   27   29   33    26
  14  |    8    6    8    7    6   56    6   10    9    3 |    36   37   38   39   38   55   39   38   43    37
  15  |    7    8    8    5    5    8    7   10   13    3 |    42   43   44   40   43   46   44   40   43    41
  16  |   10    5    7    7    6   10    6    9   11    3 |    19   20   20   20   22   24   20   21   24    19
  17  |    5    5   12    8    6   13    6   12    7    3 |    25   24   29   28   25   30   24   25   27    24
  18E |   12   16   12   10    5   54   11   14   14    5 |    54   58   57   57   53   59   55   49   53    54
  19  |    6    4    8    6    4   11    6   20    8    3 |    26   26   29   28   25   28   26   29   28    26
  20  |    7    8   10    6    5   10    6    9   14    3 |    23   23   27   24   24   26   28   28   34    25
  21E |    8    8   15    7    5   10    6   12   12    4 |    28   25   26   27   24   27   28   26   30    26
 X22  |   10  ---   12    5    5   10    5   11  ---    4 |    30  ---   33   30   29   34   31   33  ---    31
  23  |    9    7   11    5    5   50    7   10   13    3 |    29   31   34   34   30   29   32   32   33    31
  24E |   12   15   29   11    5   10    7   11   15    6 |   117  114  116  113  114  103  113  112  118   114
  25  |    7   10    9    8    4    9    5   10    9    3 |    28   32   28   28   29   32   25   30   29    27
  26  |    7    9    9    6    5    6    6    6    9    3 |    28   28   29   22   28   30   25   23   28    25
  27  |    8    8    8    9    5   10    6    9   11    3 |    22   22   21   19   20   26   20   20   22    20
 X28E |   35   32  ---   25    8   59   23   18   21   12 |   107   99  ---  105   99   97  100  107   98   101
  29  |    7    7   10    9    6   10    7   10    8    3 |    26   23   27   24   22   25   22   23   22    23
  30E |   10   10   23   11    7   10    9   16   11    5 |    34   37   39   37   34   38   37   39   37    35
  31E |    6    7    8    8    5    9    7   12    9    3 |    35   37   36   34   36   37   32   31   37    34
  32  |    9    8   11    6    4    8    8    9   17    4 |    28   29   32   28   29   31   26   28   31    27
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    9    9   12    8    5   23    7   12   11      |T   41   42   41   41   41   44   41   42   44    41
 WRMS |    8    9   11    7    5   24    7   10   11      |NE  37   38   39   37   37   41   37   38   40    36
 MEDI |    9    8   11    7    5   10    7   11   11      |MD  30   32   33   32   29   32   31   32   34    31



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 4.2255   GPS week: 2255   MJD: 60029.0-60035.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |U   10    10    31 |U   10    16    38 |U    8    15    29 |
esa | esa 2976 |    13    14    30 |U   11    19    44 |U    7    17    32 |
gfz | gfz 2975 |U   10    10    29 |U   10    13    36 |     8    14    29 |
grg | grg 3069 |U   12    13    36 |U   11    16    37 |     9    15    35 |
igr | igr 3069 |    10    10    28 |    10    14    36 |     7    13    27 |
igs | igs 3057 |    11    10    30 |     9    13    34 |     7    12    26 |
jpl | jpl 3044 |    16    14    32 |    11    17    50 |    11    19    35 |
mit | mit 3072 |U   28    28    53 |U   54    78   196 |U   19    24    47 |



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 5.2255.0   GPS week: 2255   Day: 0   MJD: 60029.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10     7    29 |    12    16    41 |     8    16    27 |
esa | esa 2976 |    12    14    28 |    13    18    46 |     7    16    30 |
gfz | gfz 2976 |     8     7    26 |    12    11    34 |     8    10    27 |
grg | grg 3072 |    11    13    32 |    13    15    38 |     8    13    29 |
igr | igr 3072 |    10    11    25 |    12    14    38 |     6    12    24 |
igs | igs 3072 |     9    10    27 |    11    13    36 |     6    12    25 |
jpl | jpl 3072 |    14    11    27 |    13    17    56 |    10    17    28 |
mit | mit 3072 |    35    19    71 |    28    12    80 |    15    18    54 |

Table 5.2255.1   GPS week: 2255   Day: 1   MJD: 60030.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9     9    28 |     9    14    31 |     7    18    40 |
esa | esa 2976 |    12    14    26 |     9    15    42 |     7    20    39 |
gfz | gfz 2976 |     8    10    24 |     8    12    29 |     6    20    37 |
grg | grg 3072 |    10    13    31 |     9    15    27 |     8    18    44 |
igr | igr 3072 |     9    11    24 |     8    12    27 |     6    17    32 |
igs | igs 3072 |    10    11    27 |     8    11    29 |     6    15    36 |
jpl | jpl 3072 |    14    15    26 |    10    13    44 |    10    25    41 |
mit | mit 3072 |    16    17    32 |    10    11    45 |    11    19    43 |

Table 5.2255.2   GPS week: 2255   Day: 2   MJD: 60031.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10     9    31 |    12    16    44 |     8    11    24 |
esa | esa 2976 |    14    15    31 |    13    20    54 |     7    15    29 |
gfz | gfz 2976 |    11    16    31 |    13    15    42 |     8     9    23 |
grg | grg 3070 |    12    11    36 |    13    17    45 |     8    11    30 |
igr | igr 3072 |    10    10    29 |    12    16    43 |     6    11    22 |
igs | igs 3072 |    11    10    31 |    12    15    43 |     6    10    22 |
jpl | jpl 3072 |    15    14    30 |    13    19    66 |     9    15    28 |
mit | mit 3072 |    72    64    85 |   238   395   927 |    60    60    97 |

Table 5.2255.3   GPS week: 2255   Day: 3   MJD: 60032.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10    10    34 |  ----  ----  ---- |     9    15    26 |
esa | esa 2976 |    11    13    32 |  ----  ----  ---- |     9    19    34 |
gfz | gfz 2976 |     9     8    30 |  ----  ----  ---- |     9    11    26 |
grg | grg 3072 |    11    11    37 |  ----  ----  ---- |    10    18    33 |
igr | igr 3072 |    10     9    29 |  ----  ----  ---- |     7    16    25 |
igs | igs 3066 |    10     9    30 |  ----  ----  ---- |     7    11    23 |
jpl | jpl 2976 |    16    14    37 |  ----  ----  ---- |    14    23    33 |
mit | mit 3072 |    20    17    43 |  ----  ----  ---- |     9    16    26 |

Table 5.2255.4   GPS week: 2255   Day: 4   MJD: 60033.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    13    10    38 |    11    17    39 |     9    13    33 |
esa | esa 2976 |    15    16    37 |    13    20    32 |     6    19    33 |
gfz | gfz 2976 |    11    10    34 |    13    16    43 |     8    14    31 |
grg | grg 3071 |    14    15    43 |    15    18    38 |     8    13    38 |
igr | igr 3056 |    13    10    36 |    11    17    33 |     7     9    27 |
igs | igs 2976 |    15    12    39 |    11    15    29 |     8     9    25 |
jpl | jpl 2976 |    18    17    43 |    12    18    43 |    12    18    37 |
mit | mit 3072 |    16    18    47 |    18    17    44 |    15    25    37 |

Table 5.2255.5   GPS week: 2255   Day: 5   MJD: 60034.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10     9    29 |    10    12    36 |     9    17    34 |
esa | esa 2976 |    14    13    30 |     9    16    50 |    10    20    36 |
gfz | gfz 2975 |    10    10    30 |     8    11    37 |    10    19    37 |
grg | grg 3062 |    13    12    38 |     7    14    39 |    11    19    45 |
igr | igr 3072 |    11    10    30 |     7    11    39 |    10    16    34 |
igs | igs 3072 |    11    10    30 |     7    11    37 |    10    15    33 |
jpl | jpl 3072 |    17    13    31 |     9    16    49 |    12    23    46 |
mit | mit 3072 |    15    10    39 |    12    12    45 |    12    17    41 |

Table 5.2255.6   GPS week: 2255   Day: 6   MJD: 60035.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    11    12    28 |     8    19    34 |     9    13    23 |
esa | esa 2976 |    14    15    26 |     9    22    39 |     8    13    22 |
gfz | gfz 2975 |     9    11    27 |     8    15    33 |    10    14    25 |
grg | grg 3068 |    12    13    33 |     8    16    33 |     9    13    30 |
igr | igr 3072 |    11    11    26 |     7    17    35 |     8    12    23 |
igs | igs 3072 |    11    12    28 |     7    15    32 |     8    11    22 |
jpl | jpl 3072 |    16    15    30 |     8    19    42 |    10    15    32 |
mit | mit 3072 |    21    54    53 |    18    22    37 |    13    17    30 |


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 6.2255   GPS week: 2255   MJD: 60029.500-60035.500

                                                         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 |      -7     -22      62     -60     -6 |      13     19
            |      13      15      63      83      3 |       2
esa   uuuuu |      -2     -16      59       5     -5 |      37     40
            |       9      11      50      27      6 |       2
gfz   uuuuu |       8     -32     132      81      3 |      16     22
            |      13      14      82     127      4 |       4
grg   uuuuu |     -23       1       1      -6      1 |      15     19
            |      18       5      38      74      3 |       2
igr   xxxxx |     -15     -11      87     -54     -3 |       5     14
            |      13      17      19      61      2 |       1
irf   xxxxx |      10       1      -3      61      0 |       5     18
            |      14       7      29      21      6 |       3
mit   uuuuu |      31      34     -86     108      8 |      28     34
            |      20      19      68      29      7 |       5
ngs   uuuuu |     -20      22    -144    -178      2 |      18     22
            |      25      20      82     132      2 |       2
sio   xxxxx |      93     -42    -279    -275     11 |      29     37
            |      35      66      79      74     11 |       5


Table 7.2255.0   GPS week: 2255   Day: 0   MJD: 60029.500

                                                         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 |     -18     -42     -32    -112    -10 |      15     20
esa   uuuuu |      12     -10       5     -21      1 |      34     38
gfz   uuuuu |      28     -27     166     312     -3 |      12     19
grg   uuuuu |     -32      -1     -24      28      2 |      14     19
igr   xxxxx |     -26     -29     100     -53     -4 |       6     13
irf   xxxxx |      26      10      13      75      6 |       3     18
mit   uuuuu |      42      48      -1     140     18 |      23     30
ngs   uuuuu |     -49      25     -90    -348      2 |      16     20
sio   xxxxx |     158      48    -413    -286     29 |      23     32

Table 7.2255.1   GPS week: 2255   Day: 1   MJD: 60030.500

                                                         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 |      -7     -18      54    -156     -9 |      12     18
esa   uuuuu |      -8     -11      12       1      0 |      33     36
gfz   uuuuu |      19     -13      -3     136      8 |      10     18
grg   uuuuu |     -17      -1     -25      48     -1 |      11     16
igr   xxxxx |     -16     -33      94    -123     -4 |       3     12
irf   xxxxx |       6      -6      42      49      6 |       0     15
mit   uuuuu |      19      14      -5     132     11 |      21     27
ngs   uuuuu |      -8      39     -67    -227     -3 |      14     18
sio   xxxxx |     114      33    -221    -351     17 |      23     31

Table 7.2255.2   GPS week: 2255   Day: 2   MJD: 60031.500

                                                         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       4      33       6     -8 |      15     20
esa   uuuuu |       5     -11      15      -1      0 |      37     40
gfz   uuuuu |      13     -30     153       9      7 |      15     21
grg   uuuuu |     -16      11      10      55     -3 |      15     19
igr   xxxxx |     -13       3      96     -81     -5 |       6     14
irf   xxxxx |       1       3       6      66      3 |       4     17
mit   uuuuu |       1       6     -45     125     11 |      26     32
ngs   uuuuu |       8      17    -159    -320      1 |      18     21
sio   xxxxx |      74     -22    -297    -260      1 |      28     37

Table 7.2255.3   GPS week: 2255   Day: 3   MJD: 60032.500

                                                         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 |     -14     -12     133    -104     -4 |      15     20
esa   uuuuu |     -16      -5      62     -33     -6 |      39     41
gfz   uuuuu |      -5     -21     101      34      1 |      17     22
grg   uuuuu |      10       2     -59      78     -2 |      16     20
igr   xxxxx |     -29       9      69    -118     -3 |       6     14
irf   xxxxx |      -8      -7       0      20      1 |       5     18
mit   uuuuu |      14      34    -102      54     12 |      28     34
ngs   uuuuu |      11     -17    -140     -17      3 |      18     22
sio   xxxxx |      48     -59    -269    -293     17 |      28     37

Table 7.2255.4   GPS week: 2255   Day: 4   MJD: 60033.500

                                                         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     -22      32      75     -3 |      13     17
esa   uuuuu |      -1     -26      80      30    -12 |      38     41
gfz   uuuuu |      -3     -51     214     -96      4 |      17     23
grg   uuuuu |     -30      -4      37    -100      1 |      15     19
igr   xxxxx |      10     -18      57     -34      1 |       5     13
irf   xxxxx |      31       0     -15      71     -4 |       6     18
mit   uuuuu |      52      44    -131      93      4 |      30     36
ngs   uuuuu |     -17      44    -184     -60      2 |      19     23
sio   xxxxx |      95    -129    -196    -352      0 |      30     40

Table 7.2255.5   GPS week: 2255   Day: 5   MJD: 60034.500

                                                         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 |       1     -30     150     -14     -5 |      14     18
esa   uuuuu |      -1     -35     103      27     -4 |      40     42
gfz   uuuuu |      -5     -50     224     105      2 |      21     25
grg   uuuuu |     -44      -2      47     -76      5 |      17     21
igr   xxxxx |     -13     -15     114      54     -3 |       8     14
irf   xxxxx |      11      -1     -18      85     -9 |       9     18
mit   uuuuu |      50      61    -156     104     -2 |      35     39
ngs   uuuuu |     -37      28    -298    -208      3 |      22     25
sio   xxxxx |      82     -62    -212    -133      4 |      35     42

Table 7.2255.6   GPS week: 2255   Day: 6   MJD: 60035.500

                                                         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     -34      66    -115     -3 |      10     21
esa   uuuuu |      -7     -11     134      36    -13 |      37     41
gfz   uuuuu |      10     -30      69      66      5 |      19     26
grg   uuuuu |     -34       5      22     -70      2 |      15     22
igr   xxxxx |     -20       5      80     -21     -3 |       4     18
irf   xxxxx |       5       8     -51      64     -6 |       6     22
mit   uuuuu |      37      32    -160     112      0 |      34     39
ngs   uuuuu |     -49      18     -69     -67      2 |      19     26
sio   xxxxx |      78    -105    -347    -247      8 |      34     42


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