[IGSREPORT-29251] Wk 2253 IGS Final Orbits

acc acc at igs.org
Mon Apr 3 08:29:32 UTC 2023


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2253   (Mar 12, 2023 - Mar 18, 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_20230710000_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 CZTG
                0  |  ESA   | NRMD NRMD SVTL TUVA
                0  |  GFZ   | 5 CPVG CPVG LAUT
                0  |  GRG   | CZTG JFNG CZTG JFNG MAW1
                1  |  COD   | NANO SVTL
                1  |  ESA   | DGAR
                1  |  GFZ   | SEYG DGAR SEYG
                1  |  GRG   | 13 17 13 17 GLPS HYDE REUN
                1  |  MIT   | MDVJ
                2  |  COD   | DAEJ
                2  |  ESA   | NRMD CPVG NRMD
                2  |  GFZ   | 13 CPVG
                2  |  GRG   | 13 CPVG JFNG HYDE JFNG KIRI
                3  |  COD   | AREQ
                3  |  ESA   | FAIR NRMD FAIR NRMD
                3  |  GRG   | 13 CZTG DAV1 CZTG DAV1 FAIR KIRI SVTL
                4  |  ESA   | NKLG SVTL
                4  |  GFZ   | 5 5 LAUT
                4  |  GRG   | ASCG CZTG GAMB ASCG CZTG GAMB KIRI SEYG
                4  |  MIT   | MDVJ
                5  |  GRG   | 1 6 1 6 CZTG CZTG KIRI
                6  |  COD   | COCO HYDE
                6  |  GFZ   | 13
                6  |  GRG   | 13 13 DAV1 GUAM DAV1 GUAM SVTL

 5. Starting on 22-Oct-2000 (GPS Week 1085-0; MJD=51839) all IGS clock products
    are based on the new clock combination scheme which uses the clock RINEX
    files as input if available, otherwise SP3 clocks are used. The AC clocks are
    corrected for the radial offsets of their satellite orbits compared to the
    combination.

 6. The following orbit solutions were excluded from the combination because they
    were biasing the weighted average (generally indicated by long arc RMS). They
    were still used for statistics computation.
    
               Day | Centre | PRN list
               ----+--------+---------------
                5  |  GRG   |   1   6

 7. Velocity changes were estimated to alleviate the effects of modeling problems,
    experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G01 |  4 |    |  4 |    |    |  4 |  4 |
           PRN G06 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |

 8. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) all IGS products, including the IGS combined
    orbits, are based on the IGS realization of the ITRF2005 reference frame
    (IGS05). For more information see IGSMAIL #5447. The IGS05 frame is also the
    basis for the homogeneously reprocessed IGS products from GPS Weeks 730 to 1459
    (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products, are
    based on the IGS realization of the ITRF2008 reference frame (IGS08). For more
    information see IGSMAIL #6354.
    
    Starting 07-Oct-2012 (GPS Week 1709, day 0, MJD 56207) all IGS products, are
    based on the updated IGS08 frame (IGb08). For more information see IGSMAIL
    #6663.
    
    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.
    

 9. Small rotations were applied to all the AC orbit and ERP values in order to
    align them to the current IGS reference frame. These RX, RY and RZ rotations
    were estimated in the IGS SINEX combination process, performed by the IGS
    Reference Frame Coordinator at the Institut Geographique National (IGN).
    Starting on 19-Aug-2012 (GPS Week 1702; MJD=56158), ACs began contributing
    products based on 1d SINEX integrations. As a result, the SINEX combinations
    are now done daily instead of weekly, and the associated daily rotations are
    applied here to the orbits and ERPs. The estimated 7 transformations, from
    which only the 3 rotations are applied to the orbit and ERP values, are:
    
            |     |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre | Day |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+-----+---------------------------------------------------
       COD  |   0 |     .5     .5     .3      -2     -6      1     .20
       EMR  |   0 |   -6.5    7.0    1.5      15     -7     24     .40
       ESA  |   0 |    1.2     .4   -1.3       3     -7     -1    -.20
       GFZ  |   0 |     .2     .0    -.3     -20    -14      7     .55
       GRG  |   0 |     .2   -1.0    -.8       8     -1     24     .30
       JPL  |   0 |    2.7    2.3   -8.7      -3     70    -26     .76
       MIT  |   0 |    5.2   -1.0   33.9      -2    -28      3     .29
       NGS  |   0 |    8.0    2.5    5.9     -20    -23     24     .24
       SIO  |   0 |    7.8    3.3    5.6      52   -103     25     .24

       COD  |   1 |     .1     .5     .4       0     -9      0     .15
       EMR  |   1 |    2.0    2.0    -.4      11     -9     19     .48
       ESA  |   1 |     .4     .1   -1.2       1      2    -13    -.24
       GFZ  |   1 |    -.4    -.1    -.0     -20      4     11     .36
       GRG  |   1 |     .8    -.3    -.9     -17     -9     14     .15
       JPL  |   1 |    2.7   -4.0   -7.3       0     50    -39     .78
       MIT  |   1 |    6.8   -5.3   36.8      -4     -7     24     .20
       NGS  |   1 |   10.5   -1.3     .5     -19    -34      4     .18
       SIO  |   1 |   10.4     .1    8.8      -7   -117     13    -.04

       COD  |   2 |     .2     .1     .7       0    -12     -2     .09
       EMR  |   2 |     .9     .8     .7      13     -1     25     .55
       ESA  |   2 |     .7     .4   -1.2     -14    -19     11    -.30
       GFZ  |   2 |    -.1     .5    -.1     -31     -8     25     .37
       GRG  |   2 |     .7    -.1    -.7     -17    -18     44     .10
       JPL  |   2 |    6.0   -1.7   -8.8     -19     48    -36     .52
       MIT  |   2 |    5.1   -4.5   32.2     -16    -25     -1     .32
       NGS  |   2 |    7.4   -1.4    3.3     -26    -27     33     .04
       SIO  |   2 |    7.1    -.2    6.7     -31   -123     46     .27

       COD  |   3 |    -.4     .2     .6       3    -13     -3     .12
       EMR  |   3 |    1.5    5.7   -3.3       6    -21     22     .23
       ESA  |   3 |     .2    -.2   -1.1     -13     -5      7    -.41
       GFZ  |   3 |    -.7    -.1     .3     -21      8     14     .32
       GRG  |   3 |     .9     .1    -.8     -12    -15     14    -.06
       JPL  |   3 |     .0    6.7   -6.0      -2     62    -43     .64
       MIT  |   3 |    7.2    -.6   29.2      -5    -23    -12     .11
       NGS  |   3 |    8.3   -7.2   15.4     -85     -1     36     .04
       SIO  |   3 |    6.0    4.2    5.8      57    -92     32    -.12

       COD  |   4 |    -.7     .3     .4       4     -4     -7     .18
       EMR  |   4 |    1.1    2.5   -3.9      11     -5      8     .39
       ESA  |   4 |    -.1    -.8    -.7      -1    -27     21    -.11
       GFZ  |   4 |    -.2     .0     .2     -14     10      8     .41
       GRG  |   4 |     .5    -.9    -.7      -9     -6     31     .31
       JPL  |   4 |   -4.2   -5.2   -9.5      -5     52    -24    1.00
       MIT  |   4 |    3.7   -4.4   31.6     -33    -28      7     .34
       NGS  |   4 |    5.1   -8.6    6.2     -65     -7      9     .27
       SIO  |   4 |    5.0   -2.3   11.9     -37    -45     48     .09

       COD  |   5 |    -.7     .3     .1      -4     -9      3     .20
       EMR  |   5 |   -2.8    4.6   -8.5      11     -8     31     .21
       ESA  |   5 |     .5     .2    -.8     -11    -10     20    -.26
       GFZ  |   5 |     .3     .7    -.2     -23    -16     24     .39
       GRG  |   5 |     .0    -.8    -.8      -4    -19     34     .46
       JPL  |   5 |   -6.5   -5.7  -10.1       1     37    -48     .86
       MIT  |   5 |    3.1   -4.1   29.0      -6    -16      0     .13
       NGS  |   5 |    5.4    1.3   22.0     -51     28     -7     .29
       SIO  |   5 |    6.0   -4.5   19.1     -65    -44     63    -.06

       COD  |   6 |    -.1     .1    -.1       2     -3     -1     .08
       EMR  |   6 |    9.0    2.5    2.3       7     -3     26     .28
       ESA  |   6 |     .6     .6   -1.2     -10    -11     -6    -.39
       GFZ  |   6 |    -.3    -.0     .1     -19     -9     -1     .45
       GRG  |   6 |     .8    -.7    -.4      -8      8     21     .00
       JPL  |   6 |     .5   -1.7   -4.5     -17     39    -49     .77
       MIT  |   6 |    6.7   -3.5   28.8     -45    -13     -1     .34
       NGS  |   6 |   13.8   -5.1   -4.0     -23    -57     38     .14
       SIO  |   6 |    8.6    1.9   11.5      27   -127      1    -.02


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

11. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) the absolute antenna model is introduced (IGSMAIL
    #5438). The antenna phase center offsets and phase center variations are given
    in the file:
        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 1.2253.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2253.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 2.2253.[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 3.2253.[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 5.2253.0-6). 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 2253 summary.                       (Mar 12, 2023 - Mar 18, 2023)

Table 1.2253.a   GPS week: 2253   MJD: 60015.000-60021.000

         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  831|   -1     0     1    14   -35     7   .02    8    8 |    -655     261      5     89
        |    0     0     1    12    14    18   .01           |     119     136
emr   86|   -7     1     0    60   -46    -3   .01   20   19 |      -7   -1990     54    133
        |    2     1     2    25    21    35   .04           |    2143    4496
esa  150|   -1     0     3    14   -23    -3  -.03    9    9 |    -922     866      6     73
        |    0     0     1    17    13    16   .01           |     367     641
gfz  124|    0     0     4    35    -4    -4   .09   10    9 |     -53      62      9     84
        |    0     0     3    14    15    18   .03           |     296     494
grg  120|    2    -1     0     7    -7    -6   .01   16   10 |    -111     112      7    123
        |    0     0     1    19    17    20   .03           |      91     146
igr  n/a|    0     0    -3    15   -11    -2   .03    5    5 |    2910    -491     11     73
        |    0     0     1    14    10    20   .01           |    1865     927
jpl   80|   -3    -1    -9    18   -21    16   .16   24   25 |    1298    -313     72    150
        |    1     1     1    17    13    23   .01           |    1726     915
mit  363|    0     0    -3   -14   -29   -16  -.01    6    6 |   -6217    -149     86  12491
        |    0     0     1    20    22    53   .02           |    9415     557
ngs  280|    1     0    -2     7   -14    10  -.08   11    9 |    -627     216    863   1784
        |    0     1     6    23    22    30   .02           |     181     219
sio  368|    0     0    -2   -58   149    25  -.04    9    8 |     ---     ---    ---    ---
        |    0     0     1    62    63    27   .02           |     ---     ---


Table 1.2253.b   GPS week : 2253   MJD: 60015.000-60021.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.2253.0   GPS week: 2253   Day: 0   MJD: 60015.000                            

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  840|    0     0     3     2   -37    35   .01    7    7 |    -535     138      6     97
emr   88|   -8     3     2    54   -37    47  -.03   19   19 |   -1129    1331     55    123
esa  150|    0     0     3    35   -39     3  -.01    8    8 |   -1552    2043      6     73
gfz  126|    0     0     2    42   -23    -8   .06    8    8 |      52    -103      9     83
grg  124|    1    -1     0    33   -17    30   .01   13   11 |    -163     214      8    114
igr  n/a|    0     0    -2    28   -15    15   .02    4    4 |    5114     395     11     70
jpl   80|   -2    -3    -7    26   -22    32   .17   25   25 |    2755    1148     74    143
mit  363|    0     0    -4   -32   -32   -56   .00    6    6 |    8716     376     62  13335
ngs  290|    2     1    -3    38    -4    26  -.09   10    8 |    -536     145    843   1819
sio  366|    0     1    -2   -85   181    13  -.05    8    7 |     ---     ---    ---    ---

Table 2.2253.1   GPS week: 2253   Day: 1   MJD: 60016.000                            

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  839|    0     1     2     6   -59    14   .01    8    8 |    -665     288      5     94
emr   88|   -8     1     1    27   -61    -3   .04   19   18 |    -870    -629     51    135
esa  150|   -1     0     5     1   -10    -4  -.01    9    8 |   -1127    1153      5     68
gfz  127|    0    -1     5    33    15    26   .12    9    8 |    -153     262      9     88
grg  125|    1    -2     0   -12    -1     6  -.02   11   10 |    -115     229      7    128
igr  n/a|    0     0    -1     5     7    20   .03    5    5 |    5206   -1116     11     69
jpl   80|   -2    -1   -11    -1     7    43   .18   24   25 |    3559    -697     72    156
mit  363|    0     0    -3    22   -51   -48   .00    6    6 |   -9553    -684     77  12227
ngs  288|    1     0    -6    10    -4    29  -.08   10    9 |    -753     410    703   1654
sio  374|    0     1    -2   -90   147    12  -.04    8    8 |     ---     ---    ---    ---

Table 2.2253.2   GPS week: 2253   Day: 2   MJD: 60017.000                            

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|   -1     0     2    39   -17     5   .02    9    8 |    -446      11      5     91
emr   84|   -8     0    -2    78   -42   -30   .02   20   20 |    4694  -11935     50    124
esa  150|   -1    -1     4    15   -19   -27  -.04    9    9 |    -567     263      6     69
gfz  125|    0     0    10    28   -11   -24   .07   10   10 |     111    -503      9     80
grg  125|    2    -2     0     4     1     0  -.00   10   10 |      38    -125      8    141
igr  n/a|   -1     0    -2    27   -10   -22   .03    5    5 |    4107   -1574     12     73
jpl   80|   -2    -2   -11     3   -22    -4   .15   24   25 |    2872    -905     68    173
mit  363|    0     1    -4     3   -40    10   .02    6    6 |  -17440    -978    190  13002
ngs  286|    1     1    -5    16   -13    -3  -.09   10   10 |    -449      23    968   1918
sio  373|    0     0    -4  -131   168    26  -.00   10    9 |     ---     ---    ---    ---

Table 2.2253.3   GPS week: 2253   Day: 3   MJD: 60018.000                            

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  825|   -1     1     0    14   -35    15   .04    9    9 |    -756     331      6     85
emr   86|   -9     2    -2   105   -50   -19  -.06   19   18 |    -147   -1767     53    109
esa  150|   -1    -1     4    39   -24     4  -.03    9    9 |   -1172    1173      6     74
gfz  123|   -1     0     1    63   -20    -4   .10    9    9 |    -646     834     10     83
grg  118|    1    -1    -2    30   -22   -29   .06   12   11 |    -214     284      8    123
igr  n/a|    0     0    -4    35   -13     5   .01    5    5 |    2185   -1487     11     73
jpl   80|   -2     1   -11    50   -24    21   .16   24   24 |    -770   -1373     71    146
mit  363|    0     0    -4   -25   -46   -29  -.01    6    5 |    1661    -165     76  14377
ngs  275|    1     0     3    -6   -34    17  -.11   10    9 |    -848     481   1162   2049
sio  362|    0     0    -2   -84   199    36  -.04    8    7 |     ---     ---    ---    ---

Table 2.2253.4   GPS week: 2253   Day: 4   MJD: 60019.000                            

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  824|   -1     0     0     6   -43     6   .03    8    8 |    -761     357      5     87
emr   85|   -5     0     0    49   -64    10   .04   20   20 |   -1702     524     50    141
esa  150|    0     0     2    17   -44    22  -.03    9    9 |    -643     287      6     70
gfz  125|    0     0     4    35    -6    14   .07   11   11 |      84     181     10     91
grg  115|    2    -1     0    11   -28    -7   .04   12   11 |    -202     -27      8    108
igr  n/a|   -1     0    -4    10   -26    12   .03    5    5 |     671     742     11     75
jpl   80|   -4     0    -9    24   -29    39   .16   24   24 |      37     573     71    147
mit  363|    0     1    -2   -18   -18   -80   .01    6    6 |   -1450     632     62  10186
ngs  272|    1    -1    -2    24   -24    53  -.11   10    9 |    -721     263    936   1721
sio  367|    0     0    -2   -57   201    63  -.05    9    9 |     ---     ---    ---    ---

Table 2.2253.5   GPS week: 2253   Day: 5   MJD: 60020.000                            

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  824|   -1     0    -2     7   -37     0   .02   11    7 |    -711     393      6     84
emr   89|   -7     3    -3    45   -64    28   .03   20   19 |    -748    -770     53    142
esa  150|   -1     0     1     0   -21    -4  -.04   10    9 |    -642     715      7     84
gfz  124|    0     0     0    31     7   -16   .10   10   10 |     275    -566     11     80
grg  112|    2    -2    -1    -3    -9   -16  -.00   44   10 |     -84     101      8    118
igr  n/a|    0     0    -5     8   -13   -24   .05    6    5 |    1696    -457     13     75
jpl   80|   -6     0   -10    20   -32   -11   .16   26   27 |     756    -942     76    148
mit  363|    1     1    -3   -23   -28     5  -.03    8    6 |  -13798    -154     70  15534
ngs  279|    2     2     8     5    23   -15  -.05   11    9 |    -357    -137    696   1745
sio  370|    0     0     0   -18   128    45  -.06   13    9 |     ---     ---    ---    ---

Table 2.2253.6   GPS week: 2253   Day: 6   MJD: 60021.000                            

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  834|   -1     0     1    21   -17   -25   .03    8    8 |    -713     311      5     90
emr   86|   -3    -1     2    66    -3   -54   .02   20   20 |    -148    -689     70    161
esa  150|    0    -1     4    -3    -7   -20  -.04    9    9 |    -757     431      6     76
gfz  124|    0     0     4    17     6   -21   .13    9    9 |     -97     333      9     86
grg  123|    1    -2     0   -15    24   -26  -.01    9    8 |     -38     113      7    129
igr  n/a|    0     0    -1    -3    -7   -23   .03    5    5 |    1393      54     11     76
jpl   80|   -2     0    -6     7   -25    -5   .16   24   24 |    -117      -1     72    142
mit  363|    0     0    -2   -31    13    80  -.03    6    6 |  -11655     -74     68   8777
ngs  275|    2     0    -8   -33   -44   -35  -.05   11   10 |    -729     331    733   1585
sio  366|    0     0     0    60    17   -22  -.06   10   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 3.2253.0   GPS week: 2253   Day: 0   MJD: 60015.000                            

        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  |    4   21    9    9   12    4   11    8    6    6    3 |   168  169  169  171  171  168  168  171  167  168   168
   2  |    8   16    6    6   24    4   18    5    8    6    3 |    83   87   85   83   81   84   87   82   81   82    82
   3  |    7   20   10    9    6    3   11    6    5    7    3 |    21   27   21   16   19   19   26   20   18   30    18
   4  |   11   18   15    9   11    6   53    7   15    8    4 |    69   69   71   72   68   69   79   72   72   71    70
   5  |    6   15    8    7    6    4    9    7    6   10    3 |    25   29   26   28   25   27   29   26   28   37    26
   6  |    6   16    9    8    8    4   12    8   11   10    3 |   457   27  456  454  456  456  455  455  456  460   457
   7  |    6   17    7   13   14    3   10    6   12    7    3 |    30   36   30   32   35   32   36   35   36   43    32
   8  |    7   16    9    5   15    4    8    7   11    8    3 |    28   30   29   29   30   26   25   24   27   29    25
   9  |    6   21    8    9   11    4   10    5   11    9    3 |    39   41   39   39   38   38   41   38   39   41    37
  10  |    4   21    9   10    5    5   10    6    8    9    3 |    20   25   20   19   18   20   24   20   19   31    18
  11  |    7   27    8    7   13    6   60    7   13   10    3 |    73   75   75   75   75   73   80   72   76   80    73
  12  |    6   14    4    6    5    2    9    3    8    5    2 |    51   52   50   52   50   50   49   52   51   56    50
  13  |   10   18    7    9   15    5   10    9   13   11    4 |    27   29   26   28   27   27   34   28   28   32    25
  14  |    6   19    6    6   10    5   54    9   10    5    3 |    49   49   50   51   52   50   63   48   50   57    49
  15  |    8   19    7   13   13    5   11    7   14    9    4 |    38   43   37   40   37   37   40   34   35   40    35
  16  |    9   13    4    7   14    4    9    7    8    8    3 |    19   26   21   21   21   21   25   22   22   30    20
  17  |    4   18    6    9   11    5   11    8   10    9    3 |    33   39   34   37   34   34   37   35   38   39    33
  18  |    7   22   10    8   16    5   56    5   10    8    3 |    73   74   73   72   77   72   80   72   70   78    72
  19  |    8   15    5   10    9    4    9    7   14    9    3 |    36   38   37   40   38   36   36   36   37   40    35
  20  |    8   17    6    9   10    3    9    8    8   11    3 |    16   16   18   20   17   18   17   18   19   34    17
  21  |    8   13    7   10   24    4   10    8    8    6    4 |    66   71   66   72   69   67   66   66   69   71    67
 X22  |   11   33  ---   22   10    6   16    7   11  ---    6 |    44   47  ---   51   44   47   48   41   47  ---    43
  23  |    7   20    5   10    6    5   54    4    7    8    3 |    34   31   32   36   34   33   33   34   33   38    33
  24  |   11   18    9    7   19    5   15    5    8    8    4 |    46   44   44   43   45   44   46   45   43   52    44
  25  |    5   14    9    6    7    3    9    3    5    4    2 |    17   25   20   18   18   17   25   18   17   24    16
  26  |    8   19    9    8   11    4   12    6    8    6    3 |    19   28   18   20   17   17   24   16   14   22    16
  27  |    8   13    9    5   15    3   10    4   11   11    3 |    26   25   27   24   29   23   23   21   24   25    22
 X28  |    8   34   16  ---   14    7  ---    6   11    7    4 |    52   70   58  ---   54   55  ---   50   56   55    52
  29  |    8   15    7    7   14    3   12    5   10    7    3 |    38   35   34   35   39   33   34   34   32   38    34
  30  |    8   23   10    8    9    4   13    5    9    9    3 |    41   41   43   41   44   42   44   40   43   44    40
  31  |    7   27    7    8   13    6   12    4   11    7    3 |    26   31   23   26   26   25   28   23   24   32    23
  32  |    5   27    8    9    9    4    9    4    7    6    2 |    36   34   36   38   39   37   39   34   38   38    35
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    8    8   13    4   25    6   10    8      |T   56   45   57   57   57   56   59   55   56   61    55
 WRMS |    7   19    8    8   11    4   25    6    8    7      |NE  55   43   56   56   56   55   58   54   55   61    54
 MEDI |    7   18    8    8   11    4   11    6   10    8      |MD  36   36   36   38   38   36   37   35   37   40    35

Table 3.2253.1   GPS week: 2253   Day: 1   MJD: 60016.000                            

        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    9   11    3    9    5    7    7    3 |   125  126  124  126  126  125  125  125  122  123   123
   2  |   10   14    8    8   11    4   19    4   11    7    3 |   105  108  108  107  108  108  111  106  107  108   107
   3  |    5   20   10    7    6    3    9    7    8    9    3 |    28   38   32   28   28   29   33   28   29   34    27
   4  |   10   24   14    7   12    6   52    5   13    8    4 |    58   62   60   63   59   58   63   58   57   61    57
   5  |    8   10    8   10    7    5   10    5   10   10    3 |    26   26   27   29   28   29   30   27   28   37    26
   6  |    5   15   10   13    9    7   13    8    8    7    3 |   279   35  280  280  281  278  278  277  275  283   279
   7  |    8   21    6   14   14    3   10    6   12    8    4 |    40   48   40   44   45   42   41   40   41   47    39
   8  |    9   22    9    8   13    4   12    6    8   10    3 |    32   37   37   36   35   34   34   30   34   36    31
   9  |    7   17    9    8   10    5   12    6    7   10    3 |    42   49   43   43   44   43   45   40   40   46    40
  10  |    6   24   11    6    5    3   11    5    9   10    3 |    28   31   29   29   28   28   33   25   28   33    26
  11  |    7   22    9    6   12    6   58    6   12    8    3 |    65   65   68   66   69   67   69   61   65   68    64
  12  |    6   13    6    6   10    2    9    6   13    8    3 |    46   45   44   49   47   46   47   48   42   49    45
  13  |    9   18    9   12   13    6   13    7   10   10    4 |    35   40   36   40   36   38   41   34   39   38    34
  14  |    7   21    7    6    8    4   53    7   13    5    3 |    47   54   49   49   52   49   51   45   48   55    47
  15  |    7   28    7   10   12    5    9    6    9   10    3 |    43   48   40   45   42   43   46   38   44   45    40
  16  |   11   13    5    7   12    4    9   12   13    9    4 |    27   29   30   33   30   30   31   26   34   34    27
  17  |    5   22    7   10   11    5   11    6   10    6    3 |    39   50   43   48   43   45   47   39   46   44    40
  18  |    9   16   12   13   16    5   55    6   15    8    4 |    63   70   66   66   69   65   71   60   68   66    63
  19  |    6   19    7    9    8    3   11    6    9    9    3 |    44   50   46   53   48   46   46   41   49   48    44
  20  |    8   23    8   10   11    5   10    4   10    9    3 |    27   29   30   33   29   30   31   26   31   37    27
  21  |    7   14    6   16   11    5    9    6    7    8    3 |   100  103   97  100   98   98   99  101   98  103    99
 X22  |   11   30  ---   22    9    9   19    6   12  ---    6 |    67   71  ---   73   70   71   73   66   71  ---    67
  23  |   10   22    6    7    6    4   49    4   12   10    3 |    38   40   40   42   39   39   37   39   43   43    38
  24  |   10   24   11   13   18    5   13    7   10   11    4 |    40   46   40   39   45   38   42   38   40   44    38
  25  |    7   13    8    7    7    3   11    3   12    5    3 |    25   29   29   28   26   25   33   26   23   31    24
  26  |    7   22    8    7    6    3   10    5   12    7    3 |    25   27   27   28   25   25   28   23   27   32    24
  27  |    9   14    9    5   12    4   12    6   11    9    3 |    31   32   35   33   34   32   33   27   35   33    29
 X28  |   10   30   13  ---   16    9  ---    8   13    6    5 |    45   54   46  ---   46   49  ---   44   53   48    45
  29  |   10   16    9    7   15    4   12    5   11    6    3 |    45   43   42   43   47   42   45   41   42   44    41
  30  |   10   19   11    9    7    4   12    5    7    6    3 |    49   51   50   49   50   49   48   44   47   51    46
  31  |    7   18    8    9   12    7   11    5   12    6    3 |    35   36   34   38   38   35   40   34   37   40    33
  32  |    6   25    9    8    9    4   10    5    8    8    3 |    40   42   42   44   43   41   46   38   43   44    39
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    9    9   11    5   24    6   10    8      |T   54   50   55   57   56   55   57   52   55   58    53
 WRMS |    8   18    8    8   10    5   25    6    9    8      |NE  51   46   52   54   53   52   55   50   53   55    50
 MEDI |    7   19    8    8   11    4   11    6   10    8      |MD  40   45   42   44   44   42   45   39   42   44    40

Table 3.2253.2   GPS week: 2253   Day: 2   MJD: 60017.000                            

        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   18    8    8   10    4   13    6    8    9    3 |   177  179  180  183  181  180  182  183  178  180   179
   2E |   18   18   10   13   13    7   19    6    9    8    4 |   101  105  107  104  105  104  105  108  103  101   104
   3  |    6   25   10    7    7    3   13    5    6    8    3 |    24   38   26   23   19   24   32   26   22   28    22
   4  |   12   24   12    8   11    5   49    7   12   12    4 |    50   47   52   54   51   52   61   56   51   57    51
   5  |    8   13   10    7    5    7   11    7    6   11    3 |    25   26   22   26   24   24   29   29   24   33    24
   6  |    6   19    8    9   10    4   14    7   12    8    3 |   484   28  483  485  484  483  483  481  487  481   484
   7  |    9   20    7   10   11    5   10    7    8   10    3 |    31   36   29   31   34   32   36   39   33   40    32
   8  |    7   14    9    9   11    3   10    6   10   12    3 |    25   25   26   28   27   22   25   23   20   29    23
   9  |    8   19    9   10    9    5   13    5    7   10    3 |    35   36   36   34   35   35   40   39   34   40    34
  10  |    5   18   11    9    5    5   12    6    8   13    3 |    21   25   21   21   20   19   24   20   18   28    19
  11  |    8   24   10    9   10    5   57    6   12    7    3 |    36   38   40   41   41   37   45   39   38   44    37
  12  |    5   17    6    9    8    4   11    5   13    9    3 |    43   45   41   42   41   42   41   44   42   41    40
  13  |   11   15    7   18   12    7   13    8   11   12    4 |    26   29   24   30   26   26   32   28   28   32    24
  14  |    8   17    6    6    6    6   51    7    9    6    3 |    41   44   42   42   44   42   53   48   42   46    42
  15  |   10   24   10    8   12    5   13    6    6   13    4 |    33   38   32   29   31   32   34   34   32   39    30
  16  |   10   18    6   10   12    5    9   11   13   12    4 |    24   25   25   24   25   23   26   27   23   31    22
  17  |    5   21    5   11   11    7   12    7   11    6    3 |    30   37   28   35   30   31   32   35   32   35    30
  18  |    9   17   11   10   15    5   54    6   11   10    4 |    46   45   45   44   47   42   48   45   42   48    43
  19  |    6   27    5    8    7    4   13    4   10    5    2 |    32   37   30   33   31   29   32   34   26   36    29
  20  |    8   13    7    8    6    5   10    4    7    9    3 |    21   20   18   20   18   18   21   21   20   31    18
  21E |    5   12    9   17   11    8   11    5    8    9    3 |    55   56   55   58   58   55   56   59   58   60    56
 X22  |   15   33  ---   23    8    5   17    7   13  ---    6 |    35   50  ---   45   36   37   42   38   34  ---    36
  23  |    8   19    7   11    6    5   46    6   11   10    3 |    25   27   23   26   26   22   18   30   22   32    24
  24  |   11   24   11   11   15    7   15    9   15   13    5 |    38   46   37   36   40   36   40   37   36   47    37
  25  |    7   22    9   12    7    3    9    3   14    6    3 |    20   31   23   23   19   19   25   20   20   27    19
  26  |    7   20    8   11    8    2    9    5   10    9    3 |    22   24   21   22   22   20   24   21   20   30    19
  27  |    9   17   10   10   11    3   11    7   12   15    4 |    24   25   26   27   25   22   23   23   19   26    21
 X28  |   10   30   15  ---   17    8  ---    7   13    9    5 |    41   54   48  ---   46   46  ---   44   47   53    44
  29  |    8   14    7   12   13    4   12    6   12    7    3 |    32   30   29   35   32   30   27   31   27   32    29
  30  |   10   21   10    9    7    5   13    5    9    9    3 |    37   37   38   38   39   36   40   41   40   43    37
  31  |    7   26    8   12   13    7   12    4   13    7    3 |    24   34   20   24   25   23   24   25   22   31    21
  32  |    6   26    9    8    7    5   10    4   10    7    3 |    31   33   28   27   29   29   31   31   29   35    27
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20    9   10   10    5   24    6   10   10      |T   52   42   53   54   53   52   55   54   52   58    51
 WRMS |    8   20    9   10   10    5   25    6   10    9      |NE  51   39   52   53   52   50   54   53   50   57    50
 MEDI |    8   19    9   10   10    5   13    6   10    9      |MD  32   36   29   33   31   31   32   34   32   36    30

Table 3.2253.3   GPS week: 2253   Day: 3   MJD: 60018.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   21    8   10   12    5   12    6   10    9    3 |   148  141  148  150  150  148  149  147  149  147   147
   2E |   16   17   10   11    9    6   22    6    7    6    4 |    51   55   50   49   49   50   54   49   49   52    48
   3  |    7   21   10    5    9    4   12    4    5    8    2 |    34   45   38   37   36   36   39   33   38   41    34
   4  |   12   20   14    9    9    6   49    6   11    8    4 |    43   49   49   45   45   45   57   47   46   55    45
   5  |    7   12   10    8    6    4   10    5   10   10    3 |    38   38   39   39   37   39   40   40   39   49    38
   6  |    8   15    9    8    8    5   12    6    9    9    3 |   373   45  373  375  370  373  375  375  372  378   374
   7  |    8   15    8   11   10    4    9    6   13    8    3 |    41   43   41   42   45   41   43   44   40   50    41
   8  |    8   19    9    7   13    3   11    4    9    8    3 |    41   45   44   42   45   41   41   39   43   45    40
   9  |    8   14    8    9    9    4    9    6    6    5    3 |    39   44   41   42   39   40   41   38   39   48    38
  10  |    9   28   11    9    8    6   13    6   10   11    3 |    38   39   37   36   37   37   39   36   41   42    35
  11  |    9   22   10    9   10    5   57    6   14    8    3 |    43   41   45   42   49   42   51   44   50   51    44
  12  |    7   11    8    7    9    4    7    3    8    8    3 |    49   48   48   49   48   46   49   45   51   50    47
  13  |   11   22    8   13   20    6   13    8   14   11    4 |    41   41   40   44   47   42   44   40   44   46    40
  14  |    9   18    8    7    8    6   52    6    8    6    3 |    34   36   38   39   40   36   49   37   38   43    36
  15  |    9   24    7    9   12    6   10    5    6   11    3 |    44   51   42   46   43   42   44   42   46   50    42
  16  |    9   19    7    7   13    6   10   10   10    5    3 |    35   42   34   34   36   34   34   32   36   39    32
  17  |    6   22    7   10    9    5   11    6    5    8    3 |    43   47   43   47   45   44   44   43   47   48    43
  18  |   11   27    9    7   18    6   52    6   12    9    4 |    47   45   51   49   53   46   59   49   49   52    48
  19  |    9   21    7    9    8    4   10    8   11    7    3 |    41   42   41   44   43   41   41   39   45   47    40
  20  |    8   19    6    7    9    5   11    5   11    8    3 |    37   39   38   37   39   38   39   40   42   49    38
  21E |    7   14    8   10   17    5   10    5   14    8    4 |    42   43   39   43   51   40   44   41   40   46    40
 X22  |   12   32  ---   18   11    9   16    5   17  ---    6 |   120  110  ---  118  119  121  123  120  125  ---   119
  23  |    9   26    6   10    8    6   49    7   14    8    3 |    37   34   35   38   37   35   34   38   38   41    35
  24  |   11   21   11   12   22    7   15    7    9   11    4 |    66   59   64   62   65   63   66   66   69   73    64
  25  |    6   11    9    8    7    4   10    3   10    4    2 |    42   47   43   41   43   40   46   43   42   47    41
  26  |    7   17   10    7   10    6   10    6   12    7    3 |    38   44   37   38   38   36   37   34   35   44    35
  27  |    8   16   10    8   13    4   12    6   15    8    4 |    41   43   43   41   44   40   41   39   44   45    40
 X28  |    9   23   17  ---   17    8  ---    6   14    7    5 |    48   65   53  ---   54   52  ---   48   51   52    49
  29  |    8   15   10    9   14    4   12    6   10    8    3 |    45   42   42   45   43   41   44   43   42   44    41
  30  |   10   19   11   12    9    4   11    5    9    6    3 |    40   37   41   43   41   40   42   40   41   47    39
  31  |    9   13    6    7   15    7   12    4   12    7    3 |    39   49   34   36   37   37   38   36   41   39    35
  32  |    8   22    9   11    9    5   10    4   11    7    3 |    40   43   40   39   40   40   40   37   41   44    37
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19    9    9   12    5   24    6   10    8      |T   58   49   56   59   59   57   60   57   59   61    57
 WRMS |    9   18    9    9   11    5   24    5    9    7      |NE  58   49   57   59   60   58   61   58   60   61    57
 MEDI |    8   19    9    9    9    5   12    6   10    8      |MD  41   44   41   42   43   41   44   40   42   47    40

Table 3.2253.4   GPS week: 2253   Day: 4   MJD: 60019.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    9   16    7    9   14    4   10    7   10    9    3 |   119  118  121  124  119  120  121  122  119  123   118
   2E |    9   18    7    8    9    6   20    7    7    9    3 |    32   31   29   32   31   32   36   28   34   34    30
   3  |    8   20   11   12    7    4    8    5   12   10    3 |    16   27   22   17   17   19   23   15   25   23    19
   4  |   11   16   13   12   11    5   52    5   10    8    4 |    38   39   43   43   39   40   54   44   39   44    40
   5  |    6   16    8   11    7    6   14    8    9   11    3 |    23   30   19   24   23   22   26   25   25   32    24
   6  |    8   18    7   15   10    5   12    9    7    6    3 |   393   29  390  388  394  391  388  383  387  384   390
   7  |    8   19    8   18   11    4   10    5    9    9    4 |    20   25   18   27   20   21   21   23   24   26    21
   8  |    9   18    9    8   14    4   10    5    7   10    3 |    25   31   26   23   29   23   24   19   21   24    24
   9  |    7   19    9   10   10    4    8    6   11    9    3 |    23   24   23   20   20   21   25   23   24   29    21
  10  |    6   27   10    6    7    5   15    5    9    9    3 |    25   30   26   24   25   25   31   20   28   28    26
  11  |    9   23   11   10   11    5   57    5   12   11    4 |    37   42   39   37   40   36   43   36   39   44    37
  12  |    5   15    5    6    9    3    9   10   10   12    3 |    31   34   32   34   34   32   33   41   32   35    33
  13  |   11   17   10   14   18    6   14    7   15   12    5 |    22   22   17   25   32   21   25   18   23   23    20
  14  |    6   22    6   10    7    5   50    5   12    7    3 |    26   33   25   23   25   25   35   29   24   34    25
  15  |    9   23    6   10   15    7   13    7    8   11    3 |    28   37   23   28   26   27   29   24   26   31    25
  16  |   10   18    5    8   13    5   10    7   16   11    4 |    14   19   15   14   16   14   16   13   20   19    15
  17  |    5   24    8   13   11    7   12    6    9    9    3 |    19   30   18   24   21   20   24   20   21   26    18
  18  |   13   23   10   11   18    7   51    6   15   11    4 |    34   40   40   43   43   36   45   40   40   41    38
  19  |    6   29    6   16   10    4   11    8    8   10    3 |    23   34   21   32   21   22   24   24   24   29    22
  20  |    7   17    8   12   10    6   13    6   13   12    3 |    23   24   20   24   22   22   22   20   27   32    23
  21E |    6   16    9    7   15    5   10    5    9    8    3 |    29   30   26   29   35   28   28   29   34   35    29
 X22  |   10   32  ---   21   12    7   17    6   15  ---    6 |    44   38  ---   41   47   41   49   43   44  ---    44
  23  |    8   28    6    8    6    5   48    6    9    8    3 |    12   22   13   19   19   12   13   17   15   22    15
  24E |    9   23   11   10   15    6   15   10   12   12    4 |    49   58   49   46   46   48   49   52   51   55    50
  25  |    5   10   10   14    9    3   10    6    8   10    3 |    20   26   24   28   24   21   26   21   24   24    23
  26  |    8   19    9    7    8    3   10    5   10    8    3 |    23   28   21   23   22   20   25   17   20   24    22
  27  |    7   15    9   15   14    4   11    5   11   11    4 |    23   27   24   25   27   21   23   19   23   22    22
 X28  |   10   31   16  ---   17   10  ---    8   15   10    5 |    44   59   51  ---   51   47  ---   44   54   52    48
  29  |    8   17    7    8   12    6   11    5    8    7    3 |    27   23   21   27   25   23   24   24   28   26    24
  30  |    8   22   10   10    9    5   12    5    8    8    3 |    27   29   28   26   24   26   25   26   26   29    24
  31  |    8   20    7   11   16    6   11    5   12    8    3 |    19   24   15   21   22   18   20   16   21   24    17
  32  |    5   18    8    9   10    4   11    4    9    6    3 |    20   23   20   21   22   19   23   19   21   24    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   20    9   11   12    5   24    6   10    9      |T   40   33   40   42   42   40   43   40   42   45    40
 WRMS |    8   20    9   11   11    5   24    6    9    9      |NE  41   33   41   43   43   40   44   40   42   45    41
 MEDI |    8   19    8   10   11    5   12    6   10    9      |MD  25   30   24   26   25   23   25   24   25   29    24

Table 3.2253.5   GPS week: 2253   Day: 5   MJD: 60020.000                            

        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  |   22   35   10   12   94    7   33   14   10   21    7 |   470  467  469  470  459  471  472  470  472  471   471
   2E |   12   14    9   12   14    5   19    5   11   10    4 |    37   34   33   34   36   35   40   31   37   35    34
   3  |    4   15   11    7    7    4   10    9    8   10    3 |    18   24   25   17   17   21   27   21   21   21    19
   4  |   10   18   13    9   12    5   52    6   12    8    4 |    46   45   51   50   49   47   57   50   47   47    49
   5  |   10   18    9    5    8    7   11    7    8   13    3 |    23   32   22   29   22   23   27   25   26   31    25
   6  |   38  ---   25   27  219   21   55   25   25   42   13 |  9999  --- 9999 9999 9999 9999 9999 9999 9999 9999  9999
   7  |    9   19    7   10   11    5   12    6    9   10    3 |    23   27   23   29   28   25   26   26   29   28    25
   8  |    6   15   10    6   11    4   11    6    8    6    3 |    22   24   25   23   24   22   24   20   25   23    22
   9  |    7   20   10   14   12    4   10    8    9    7    4 |    27   29   28   27   28   27   29   27   26   26    27
  10  |    5   28    9    7    5    5   12    6   10    7    3 |    20   22   20   19   19   20   24   16   20   22    18
  11  |    9   24   11    8    9    6   59    5   12   13    4 |    53   59   56   59   56   56   59   55   59   61    56
  12  |    7   12    8    9    9    3    9    5   10    6    3 |    27   24   22   30   23   27   27   26   32   32    27
  13  |   10   19    7   12   11    5   12    9   10   13    4 |    22   25   23   27   23   23   26   19   22   25    21
  14  |    7   18    6    5    9    4   51    5    6    7    2 |    30   33   31   33   35   31   35   32   28   36    32
  15  |    8   26    7   10   12    6   12    5    9   12    3 |    32   40   29   35   29   33   33   30   31   34    31
  16  |    7   14    4    6    8    4    8    9   11    8    3 |    16   18   16   18   17   16   16   16   18   22    16
  17  |    5   17    7    8   11    6   13    6    8   13    3 |    26   33   26   29   27   27   32   25   27   33    26
  18  |    9   19   12   12   19    6   54    6   12   13    4 |    54   57   55   55   55   53   57   53   53   56    54
  19  |    8   16    8   16    8    5   13    8   11   16    4 |    33   37   33   42   33   33   33   29   39   40    34
  20  |    7   24    7    7    7    7   10    6   14   11    3 |    20   21   20   23   18   20   20   20   24   25    19
  21E |    5   11    8   10   10    5   12    7   10    5    3 |    30   28   25   30   32   28   30   29   28   28    28
 X22  |   10   30  ---   14    9    8   14    7   16  ---    5 |    60   43  ---   56   59   59   59   60   63  ---    58
  23  |    9   24    5    9    9    6   47    8    9   12    3 |    26   29   27   30   28   26   22   30   27   34    29
  24E |    7   23   12   11   13    5   13    5   16    8    4 |    64   60   62   59   65   61   63   63   65   65    61
  25  |    4   15   10    8    7    5    9    3    6   10    3 |    18   27   20   20   17   19   28   19   22   21    18
  26  |    6   17    8    6    7    5   12    5    8    7    2 |    19   25   19   18   20   18   24   18   21   21    18
  27  |    5   14    9    7   12    4   11    7   12    7    3 |    20   22   24   20   23   21   23   19   24   20    20
 X28  |    8   27   19  ---   14    8  ---    6   12    8    5 |    42   54   45  ---   41   43  ---   39   38   40    40
  29  |    7   14    7    8   12    6   12    4   15    6    3 |    33   33   32   36   32   32   33   31   36   34    33
  30  |    8   15   11    8   10    3   15    7    7   10    3 |    32   31   34   35   35   32   34   31   35   34    33
  31  |    7   21    7   10   12    7   12    4   13    8    3 |    21   23   18   23   25   21   22   20   24   23    20
  32  |    5   31    8    8    9    6   12    5    9    8    3 |    24   22   24   28   26   24   25   23   25   26    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   20   10   10   44    6   26    8   11   13      |T   44   46   44   46   45   44   47   44   46   47    44
 WRMS |    7   19    9   10   10    5   27    6    9    9      |NE  44   47   45   47   45   45   47   44   46   47    45
 MEDI |    7   18    9    9   10    5   12    6   10   10      |MD  27   29   25   29   28   27   28   27   28   31    27

Table 3.2253.6   GPS week: 2253   Day: 6   MJD: 60021.000                            

        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   18    7    8   10    4   11    9   12    8    3 |   435  437  434  436  428  434  436  437  433  430   435
   2E |   11   12    8    8   10    5   16    6    9    9    3 |    35   34   33   35   33   33   37   32   31   33    32
   3  |    7   25   12    7    7    4   12    7    8   10    3 |    18   25   24   19   19   20   25   19   22   19    18
   4  |   10   20   12   10   10    7   50    5   16   10    4 |    62   62   68   68   63   64   77   68   61   66    65
   5  |    6   15   10    9    5    5   10    8   10    8    3 |    25   29   26   28   25   26   29   27   29   32    26
   6  |    8  ---   10    8    9    6   12    8    8   10    3 |  9999  --- 9999 9999 9999 9999 9999 9999 9999 9999  9999
   7  |    8   17    8   19   10    4   10    6   14   11    4 |    23   26   22   29   26   24   28   28   28   29    24
   8  |   10   21    9    7   10    5   11    5   11   10    3 |    25   24   24   22   24   20   22   20   24   20    21
   9  |    7   14    9    7    9    5   12    6    8    8    3 |    29   29   30   27   27   28   32   30   27   29    28
  10  |    6   29   10    9    5    5   13    5    8   12    3 |    23   29   23   27   21   24   28   21   24   26    22
  11  |   10   27   10    7   10    5   56    4   11    8    3 |    69   73   70   69   71   68   75   65   73   73    70
  12  |    5   11    7    8    6    3    9    3   11   11    3 |    45   44   44   49   43   44   44   44   45   46    44
  13  |   10   17    8   10   10    5   12    7   12   10    4 |    21   22   20   21   20   20   25   19   22   22    18
  14  |    6   21    8    8    7    5   52    5   10    7    3 |    38   43   39   39   42   39   55   40   38   42    39
  15  |    7   24    8    7    8    5   12    7   18   11    4 |    35   39   31   32   31   33   38   29   32   30    30
  16  |    8   17    5    7    9    5   12    8   10   12    3 |    15   22   16   16   14   16   18   18   17   19    15
  17  |    4   24    6    8    9    7   11    5    8    8    2 |    22   30   22   27   24   25   29   22   28   24    23
  18  |   10   19   14   10   19    5   55    7   13   13    5 |    70   74   70   70   71   69   77   66   72   73    70
  19  |    7   22    6    8    8    5   10   10   14    8    3 |    29   33   28   33   31   28   30   26   29   30    29
  20  |    8   14   10    9    7    5   11    5   14    9    3 |    22   19   23   25   20   21   22   22   26   28    21
  21E |    9   16   10    8   10    5   11    7   17    7    4 |    33   33   30   36   33   33   33   32   37   34    32
 X22  |   12  ---  ---   20    8    7   13    7   11  ---    6 |    55  ---  ---   47   52   50   57   54   50  ---    50
  23  |   10   19    7    8    6    6   48    7   11   12    3 |    35   35   34   39   37   35   32   37   36   38    36
  24E |    6   21   10   12    9    5   13    4   10    8    3 |    65   63   63   60   65   63   65   63   62   61    62
  25  |    5   17    8    8    7    4    9    2   10    9    3 |    20   25   21   23   18   19   27   19   17   21    18
  26  |    6   21   10    7    8    3   12    6    8   14    3 |    23   25   22   23   20   18   23   20   18   19    19
  27  |    8   25   10    7   11    4   12    6   10   12    3 |    24   24   23   22   23   20   22   21   24   21    20
 X28  |    8   25   19  ---   10    7  ---    6   11    8    4 |    56   66   59  ---   51   58  ---   49   57   51    53
  29  |    7   13    6    6   11    4    9    5   11    6    3 |    34   34   29   33   30   31   31   27   32   32    31
  30  |    7   23   11   13    7    4   14    7   10    9    3 |    32   35   35   34   34   32   34   34   32   33    32
  31  |    8   26    7    9   13    6   12    5   11    6    3 |    21   26   19   21   22   20   22   19   23   21    19
  32  |    8   25    8    7    7    4   10    4    6   11    3 |    26   30   26   31   26   27   29   27   27   26    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   20    9    9    9    5   24    6   11   10      |T   47   49   46   48   46   46   50   46   47   47    46
 WRMS |    8   20    9    9    8    5   24    6   10   10      |NE  47   50   47   48   46   46   50   46   48   48    46
 MEDI |    8   20    9    8    9    5   12    6   11    9      |MD  29   30   28   31   30   28   30   28   29   30    29



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 4.2253   GPS week: 2253   MJD: 60015.0-60021.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |U    8    12    27 |U   11    20    41 |U    8     9    24 |
emr | emr 3030 |    13    15    34 |U   11    21    51 |    14    15    31 |
esa | esa 2976 |    12    16    26 |U   11    20    48 |U   11    14    34 |
gfz | gfz 2973 |U    8     9    21 |U   10    16    37 |     8     7    23 |
grg | grg 3071 |U    9    13    22 |U   11    16    36 |     9    10    27 |
igr | igr 3072 |     8     8    21 |    10    18    36 |     7     9    22 |
igs | igs 3072 |     8    11    22 |    10    16    36 |     7     8    22 |
jpl | jpl 2976 |    14    14    31 |U   11    21    49 |    11    15    37 |
mit | mit 3072 |U   13    18    37 |U   13    18    51 |U   12    11    39 |



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 5.2253.0   GPS week: 2253   Day: 0   MJD: 60015.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     7    11    23 |     8    14    27 |     5     7    26 |
emr | emr 3072 |    10    12    45 |     9    16    47 |    11    17    31 |
esa | esa 2976 |    11    16    31 |    10    17    41 |     9    14    36 |
gfz | gfz 2976 |     8     9    22 |     8    13    26 |     6     6    23 |
grg | grg 3072 |     8    15    22 |     7    11    26 |     7     8    31 |
igr | igr 3072 |     7     8    21 |     8    14    27 |     4     7    24 |
igs | igs 3072 |     7    11    21 |     7    12    25 |     5     6    24 |
jpl | jpl 2976 |    12     9    26 |     9    18    49 |     9    14    40 |
mit | mit 3072 |    10    19    40 |     8    10    58 |     9     6    40 |

Table 5.2253.1   GPS week: 2253   Day: 1   MJD: 60016.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9    11    26 |    12    19    38 |     7     7    23 |
emr | emr 3072 |    16    23    50 |    14    20    48 |    14    14    30 |
esa | esa 2976 |    16    17    32 |    15    17    47 |    11    12    34 |
gfz | gfz 2976 |    10    10    26 |    13    18    32 |     7     5    22 |
grg | grg 3071 |     9    12    26 |    13    14    34 |    12    16    20 |
igr | igr 3072 |    11     8    26 |    13    18    34 |     7     7    20 |
igs | igs 3072 |    10    10    25 |    13    16    33 |     6     6    20 |
jpl | jpl 2976 |    16    13    30 |    15    18    43 |    11    14    34 |
mit | mit 3072 |    15    16    38 |    19    21    53 |    12    12    32 |

Table 5.2253.2   GPS week: 2253   Day: 2   MJD: 60017.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9    11    24 |    10    22    41 |     9     6    24 |
emr | emr 3071 |    11    12    28 |    10    22    40 |    13    10    30 |
esa | esa 2976 |    10    16    27 |     9    20    39 |     9    12    36 |
gfz | gfz 2970 |     9    10    24 |     9    16    32 |     8     5    24 |
grg | grg 3070 |     9    15    23 |     9    16    29 |     8     7    31 |
igr | igr 3072 |     9    10    24 |     9    19    33 |     6     5    23 |
igs | igs 3072 |     9    11    22 |     8    17    31 |     6     5    23 |
jpl | jpl 2976 |    12    10    29 |     9    23    46 |     9    12    36 |
mit | mit 3072 |    15    22    48 |    14    20    57 |    11    15    44 |

Table 5.2253.3   GPS week: 2253   Day: 3   MJD: 60018.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     7     7    27 |    11    23    53 |     8     9    22 |
emr | emr 3072 |    11    10    22 |    10    24    49 |    14    15    23 |
esa | esa 2976 |    13    15    27 |    10    21    53 |    12    16    33 |
gfz | gfz 2974 |     7     6    22 |    10    19    55 |     8     7    20 |
grg | grg 3072 |     9    10    26 |    11    18    49 |     9    10    25 |
igr | igr 3072 |     9     7    24 |     9    20    44 |     8    10    21 |
igs | igs 3072 |     8     7    23 |    10    18    52 |     8     9    20 |
jpl | jpl 2976 |    13    15    30 |     9    22    50 |    11    15    33 |
mit | mit 3072 |    13    19    37 |    13    22    47 |    13    12    33 |

Table 5.2253.4   GPS week: 2253   Day: 4   MJD: 60019.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     6    10    20 |     9    21    33 |     8     9    24 |
emr | emr 3072 |     9    11    28 |    10    22    44 |    15    19    35 |
esa | esa 2976 |    10    15    26 |    11    21    41 |    11    16    37 |
gfz | gfz 2974 |     6     7    19 |     9    16    27 |     8     7    27 |
grg | grg 3072 |     7    11    20 |     9    17    26 |     8    10    30 |
igr | igr 3072 |     7     6    18 |     9    20    26 |     7     9    26 |
igs | igs 3072 |     6     9    18 |     8    17    27 |     7     9    24 |
jpl | jpl 2976 |    11     7    24 |    10    22    39 |    11    16    40 |
mit | mit 3072 |    13    18    30 |    11    17    38 |    11    10    39 |

Table 5.2253.5   GPS week: 2253   Day: 5   MJD: 60020.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    13    22    49 |    11    22    42 |    10    11    30 |
emr | emr 2976 |    18    21    34 |    12    21    45 |    16    12    32 |
esa | esa 2976 |    11    14    20 |    11    20    47 |    12    15    29 |
gfz | gfz 2976 |     7    12    20 |    10    16    36 |     9     7    22 |
grg | grg 3072 |     9    15    21 |    11    18    34 |     9     9    28 |
igr | igr 3072 |     8    11    21 |     9    18    34 |     8    10    19 |
igs | igs 3072 |     9    17    28 |     9    16    35 |     8     9    23 |
jpl | jpl 2976 |    22    25    52 |    12    21    52 |    17    21    41 |
mit | mit 3072 |    16    21    39 |    10    22    46 |    15    10    43 |

Table 5.2253.6   GPS week: 2253   Day: 6   MJD: 60021.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     6    11    23 |    15    22    54 |     8    12    20 |
emr | emr 2880 |    12    14    30 |    14    20    82 |    14    14    34 |
esa | esa 2976 |    11    16    20 |    14    22    69 |    11    15    33 |
gfz | gfz 2971 |     7     8    18 |    14    16    50 |    10     9    22 |
grg | grg 3072 |     8    13    19 |    14    18    52 |     9    10    27 |
igr | igr 3072 |     7     9    16 |    13    18    54 |     8    11    23 |
igs | igs 3072 |     7    10    17 |    14    17    51 |     8    10    21 |
jpl | jpl 2976 |    13    18    27 |    13    25    64 |    11    15    38 |
mit | mit 3072 |    12    14    30 |    16    17    58 |    12    14    40 |


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 6.2253   GPS week: 2253   MJD: 60015.500-60021.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      13     -18      57     -19     -2 |       6     25
            |      17      22      47      72      4 |       4
emr   xxxxx |      20     -64      53     126     -5 |     -14     27
            |      19      42     108     100     10 |      12
esa   uuuuu |       0     -17      52      22     -2 |      25     35
            |      10       7      24      76      4 |       4
gfz   uuuuu |       6     -37      95     194     -1 |       2     27
            |       8      15      78      64      4 |       4
grg   uuuuu |     -16       6     -57      17     -2 |      10     26
            |      13      15      28      67      4 |       4
igr   xxxxx |      -6     -13      52      28      2 |      -1     25
            |      10       6      42      59      3 |       5
irf   xxxxx |      10      -1     -10      22      6 |      -2     27
            |       9      10      19      21      9 |       7
jpl   xxxxx |       8     -18     117       9      1 |      16     29
            |      22      13      70      63     11 |       5
mit   uuuuu |      11      26     -22    -113      6 |      14     29
            |      15      23      49      17      7 |       5
ngs   uuuuu |     -36      34    -165      -2      0 |       5     23
            |      36      40      83     135      5 |       3
sio   xxxxx |     113      24    -329    -157      8 |      14     32
            |      42      63      90     134      5 |       5


Table 7.2253.0   GPS week: 2253   Day: 0   MJD: 60015.500

                                                         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      12      43      73     -1 |       1     21
emr   xxxxx |      -5     -49      12     213    -18 |       0      0
esa   uuuuu |      -3     -18      32     -60      6 |      19     29
gfz   uuuuu |      20     -18       1     204     -7 |      -1     21
grg   uuuuu |     -18     -25     -41     -29      6 |       4     22
igr   xxxxx |     -20     -15      82      -3      6 |      -7     22
irf   xxxxx |       5       1       9       6     14 |     -11     24
jpl   xxxxx |       6     -10      47      79      4 |       9     21
mit   uuuuu |      12      36     -13    -144      3 |       8     20
ngs   uuuuu |     -44     -21     -57     -18     -3 |       2     19
sio   xxxxx |     139     -15    -329     -76      3 |       8     24

Table 7.2253.1   GPS week: 2253   Day: 1   MJD: 60016.500

                                                         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 |      44     -21     -19    -115     -7 |       2     21
emr   xxxxx |      20      14     -84      -8     10 |     -35     35
esa   uuuuu |     -14     -10      53      -9      3 |      20     29
gfz   uuuuu |       9     -31      83     243      3 |      -3     22
grg   uuuuu |      -4      10     -70     115     -6 |       5     21
igr   xxxxx |     -11      -7      23     132      5 |      -6     21
irf   xxxxx |      -1      12      -4       3     14 |     -10     22
jpl   xxxxx |     -19       4      25     -32     22 |       9     21
mit   uuuuu |     -19      39      46    -107     10 |       8     21
ngs   uuuuu |     -16     -11    -177       8     -1 |       2     19
sio   xxxxx |     145      73    -494     -20     15 |       8     24

Table 7.2253.2   GPS week: 2253   Day: 2   MJD: 60017.500

                                                         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     -38      69     -93     -2 |       5     20
emr   xxxxx |      19     -70       8     121     -5 |     -20     25
esa   uuuuu |       4     -16      89      52     -1 |      25     32
gfz   uuuuu |       0     -24     197     147      5 |       1     23
grg   uuuuu |     -16      20     -88      -3     -1 |       9     21
igr   xxxxx |      -7      -7      13      71      4 |      -2     21
irf   xxxxx |       6       0     -35      -4     10 |      -4     22
jpl   xxxxx |      -1     -12     145     -95     -6 |      15     27
mit   uuuuu |       9      16     -89    -124     11 |      12     24
ngs   uuuuu |       3      45    -134     188     -7 |       5     20
sio   xxxxx |     130      58    -367    -205     15 |      13     27

Table 7.2253.3   GPS week: 2253   Day: 3   MJD: 60018.500

                                                         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      -2     128     -22     -8 |      11     28
emr   xxxxx |      32    -111      91     150    -16 |      -2     28
esa   uuuuu |       2     -20      27     161     -4 |      30     40
gfz   uuuuu |      10     -43      18     109     -4 |       6     31
grg   uuuuu |      -5      17     -99      85      1 |      15     30
igr   xxxxx |     -14     -14      -5       1     -1 |       4     28
irf   xxxxx |       9     -19     -11      22      7 |       2     30
jpl   xxxxx |     -17     -28     118      78      9 |      19     33
mit   uuuuu |      14     -11     -32    -111     14 |      18     34
ngs   uuuuu |     -48      92     -71    -131      3 |       9     26
sio   xxxxx |     111     -68    -316    -162      4 |      18     38

Table 7.2253.4   GPS week: 2253   Day: 4   MJD: 60019.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       4     -18      89      69      1 |       4     29
emr   xxxxx |      27     -75      -2      76     -1 |     -15     37
esa   uuuuu |      13     -27      28      10     -5 |      23     37
gfz   uuuuu |       5     -34      50     262     -1 |      -1     31
grg   uuuuu |      -7       1     -29      23     -3 |       9     28
igr   xxxxx |       9     -20      64     -44     -3 |      -2     29
irf   xxxxx |       9      -8       7      45     10 |      -2     31
jpl   xxxxx |      17     -33     116      41     -9 |      15     32
mit   uuuuu |      26      33      35     -89     13 |      13     32
ngs   uuuuu |     -75      24    -278    -201     -3 |       3     25
sio   xxxxx |      66      50    -335    -109     10 |      12     35

Table 7.2253.5   GPS week: 2253   Day: 5   MJD: 60020.500

                                                         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 |      22     -10      63     -20      1 |       9     29
emr   xxxxx |      50     -53     258     286      1 |     -11     33
esa   uuuuu |      10      -6      74      53     -7 |      29     39
gfz   uuuuu |      -3     -43     129     132     -6 |       5     29
grg   uuuuu |     -16      12     -35       8     -2 |      14     29
igr   xxxxx |      -1      -7      79      -3      3 |       3     28
irf   xxxxx |      28       4       1      50     -4 |       5     29
jpl   xxxxx |      37     -29     240       5     -2 |      20     33
mit   uuuuu |      25      10     -39    -102     -1 |      20     35
ngs   uuuuu |     -83      46    -245      14      9 |       8     26
sio   xxxxx |      46     105    -242    -429      5 |      19     37

Table 7.2253.6   GPS week: 2253   Day: 6   MJD: 60021.500

                                                         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     -53      24     -25      3 |       9     29
emr   xxxxx |      -2    -107      87      46     -6 |     -13     32
esa   uuuuu |     -13     -22      61     -53     -2 |      29     39
gfz   uuuuu |       0     -64     186     261      2 |       4     30
grg   uuuuu |     -42       6     -37     -82     -4 |      14     29
igr   xxxxx |       3     -21     108      42      2 |       4     27
irf   xxxxx |      13       0     -36      33     -8 |       6     29
jpl   xxxxx |      32     -17     126     -13     -9 |      21     33
mit   uuuuu |      12      58     -60    -111     -4 |      21     35
ngs   uuuuu |       9      59    -193     124      3 |       9     25
sio   xxxxx |     157     -34    -217     -98      6 |      21     37


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