[IGSREPORT-27931] Wk 2155 IGS Final Orbits

acc acc at igs.org
Sun May 16 10:18:12 UTC 2021


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2155   (Apr 25, 2021 - May 01, 2021)

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:

igs2155[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs2155[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs2155[0-6].cls  IGS GPS clock combination summary report.
igs21557.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs21557.sum      Complete report.

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

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, GRG, MIT, and
    JPL. The other centres are excluded because of poorer consistency, they provide
    broadcast clocks, or clock corrections are not provided (SIO). The clock
    information not used is still compared to the combination for completeness. The
    value of 999999.999999 microseconds, according to the SP3 format convention,
    signifies that no clock solution is available and therefore must not be used.
    
    In general, if an AC does not contribute to the terrestrial reference frame
    (i.e. the SINEX combination), then any corresponding orbits & clocks
    contributed from that AC should not be included with weight in this
    combination. This is done to ensure a high level of consistency between the TRF
    and the orbital frame. However, there is an exception for the clocks if the AC
    is the reference center. In that case, only the clocks from that AC are
    included with weight.
    
    Starting week 1707:
      cod = cof${wwww}[0-6].[clk,snx,sp3] & cod = cof${wwww}7.[erp,sum]

 2. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1582, a new orbit solution from CNES/GRGS (GRG) is included with
    weight. GRG clocks are included with weight starting 12-Aug-2012 (GPS Week
    1701, day 0, MJD 56151), after a procedural change to generate estimates in
    the center-of-figure frame instead of the center-of-mass frame. GRG LOD
    estimates are included for comparison only.

 3. The following centre clock solutions, which provide broadcast clock
    corrections, were excluded from the combination but kept in the combination
    statistics:
             -> Centre: NGS 

 4. The following clock solutions were excluded from the combination because they
    were biasing the combined clock solutions (clock shifts/outliers) but were
    kept for the RMS computation. Duplicate entries can arise due to separate
    combination runs for the 30-s clocks ACs (listed first) and the 5-min clock
    ACs (listed second).
    
               Day | Centre | PRN/STA list
               ----+--------+---------------
                0  |  COD   | BADG HYDE LHAZ MAG0 MDVJ SGOC HYDE
                0  |  EMR   | HOB2
                0  |  ESA   | HYDE HYDE
                0  |  GFZ   | IRKJ
                0  |  GRG   | 21 21 IRKJ SVTL IRKJ SVTL
                0  |  JPL   | WHIT BADG MAG0 MCM4 NRIL WHIT
                1  |  COD   | NTUS SCUB TIXI TIXI
                1  |  EMR   | FAIR SUTM YELL
                1  |  ESA   | CPVG MAW1 PTBB CPVG MAW1 PTBB
                1  |  GFZ   | ANKR PRDS IRKJ PRDS
                1  |  GRG   | CPVG LHAZ CPVG LHAZ
                1  |  JPL   | SYOG FAIR MCM4 POLV SYOG
                2  |  COD   | 7 30 TIXI LHAZ TIXI
                2  |  EMR   | 30 IRKJ SUTM
                2  |  ESA   | CUSV IRKJ OHI2 SCOR OHI2 PTBB SCOR
                2  |  GFZ   | ANKR IRKJ MDVJ OHI2 ANKR IRKJ MDVJ OHI2
                2  |  GRG   | 30 NRMD SVTL IRKJ NRMD SVTL
                2  |  JPL   | DAV1 FAIR MCM4 POLV DAV1 FAIR MCM4 POLV
                3  |  COD   | TIXI TIXI
                3  |  EMR   | 21 21
                3  |  ESA   | CPVG LHAZ PTBB CPVG LHAZ PTBB
                3  |  GRG   | 13 13 CPVG JOG2 LHAZ CPVG JOG2 LHAZ
                4  |  COD   | IRKJ POVE SOFI TIXI IRKJ POVE TIXI
                4  |  EMR   | NNOR SUTM TSKB
                4  |  ESA   | IRKJ PTBB SGOC ANKR CPVG IRKJ PTBB SGOC
                4  |  GFZ   | 21
                4  |  GRG   | 21 21 JOG2 JOG2
                4  |  JPL   | CPVG SOFI
                5  |  COD   | 21 21 ANKR POVE TIXI TIXI
                5  |  EMR   | SUTM
                5  |  ESA   | CAS1 PTBB ANKR CAS1 PTBB
                5  |  GRG   | 13 13 21 CCJ2 NLIB SVTL CCJ2 NLIB SVTL
                5  |  JPL   | 21 21 BADG BADG
                6  |  COD   | ANKR CCJ2 CPVG SYOG TIXI ANKR TIXI
                6  |  EMR   | TSKB
                6  |  ESA   | CCJ2 CPVG PTBB SGOC PTBB SGOC
                6  |  GFZ   | HOLB SYOG
                6  |  GRG   | 13 CCJ2 LHAZ CCJ2 CPVG LHAZ
                6  |  JPL   | BADG ZECK BADG CCJ2 CPVG MCM4 ZECK

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets. Note that only the largest clock offset and drift are output
    to the summary file. However, the clock combination and the listed RMS
    include all the clock segments. In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                2  |  COD   | ~23:30 | ~ -0.13 ns

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

 7. 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
               ----+--------+---------------
                6  |  GFZ   |  30

 8. 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 G30 |  4 |  4 |    |    |    |    |    |
           PRN G31 |  4 |    |    |    |    |    |  4 |

 9. 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.

10. 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 |     .2     .0     .4       6      4      3    -.16
       EMR  |   0 |   -1.9    3.2   -6.1     -23     12    -13     .27
       ESA  |   0 |     .1    -.6    -.5     -18     16     17     .02
       GFZ  |   0 |    -.4    -.1     .0      11     10     16     .05
       GRG  |   0 |    4.9     .3   -4.0      12    -21    -16     .16
       JPL  |   0 |     .1    3.8    7.5       8    -17     -7    -.18
       MIT  |   0 |    2.8    3.5    3.1      -2     18    -14     .20
       NGS  |   0 |   -1.1   -2.9    8.7      -9     -2     -3     .26
       SIO  |   0 |    -.6    2.4    6.8      17     13    -62     .16

       COD  |   1 |     .2     .1     .5       5      3      7    -.20
       EMR  |   1 |     .4     .5   -5.5      -3      8     -7     .16
       ESA  |   1 |    -.1   -1.1    -.6     -17     19     23    -.09
       GFZ  |   1 |    -.2    -.1     .1      14      7     23    -.02
       GRG  |   1 |    3.7    3.9   -3.0      19    -19     -6     .02
       JPL  |   1 |    1.8    1.6    3.2      -4      0    -11    -.02
       MIT  |   1 |     .9    2.4    5.1      -1      4     -1     .08
       NGS  |   1 |    3.6   -5.2    1.6     -32     -8    -43     .20
       SIO  |   1 |     .3    -.5    6.2     -15     -5     -5     .13

       COD  |   2 |     .2     .0     .4       3     -1      4    -.23
       EMR  |   2 |     .6   -7.7    2.6      -4      4    -15     .24
       ESA  |   2 |    -.8    -.5    -.6     -19     21     24    -.15
       GFZ  |   2 |    -.4     .2     .4       9     11     16    -.13
       GRG  |   2 |    2.7    2.9  -10.3      21    -21    -12     .01
       JPL  |   2 |    7.8   -3.9    3.0      10     -2     -1    -.06
       MIT  |   2 |    4.2    2.1    1.0      -3     22      5     .07
       NGS  |   2 |    3.8   -6.4   -4.8     -43     18    -39     .21
       SIO  |   2 |     .5     .4    7.3      -4     -5     17     .02

       COD  |   3 |     .3     .0     .3       3     -2      5    -.22
       EMR  |   3 |    1.3    -.5   -1.9       5     -9    -25     .12
       ESA  |   3 |    -.6    -.9    -.6     -23     -2     20    -.11
       GFZ  |   3 |    -.2    -.1    -.0      12      3     23    -.03
       GRG  |   3 |    2.1    -.2   -9.1      28    -21     -5     .07
       JPL  |   3 |    5.4   -5.6    2.4      -1      3     -3     .07
       MIT  |   3 |    4.1    1.0    7.1      -9      6     -6     .14
       NGS  |   3 |    7.5   -6.0    6.1     -15    -44    -45     .10
       SIO  |   3 |    3.3   -2.0   16.3     -47    -68     27     .01

       COD  |   4 |     .1    -.1     .7      10      8      0    -.19
       EMR  |   4 |    1.0     .4   -1.6      -4     -6      1     .21
       ESA  |   4 |    -.4    -.8    -.4     -17     13     24     .04
       GFZ  |   4 |    -.1    -.3     .1       8      1     23     .04
       GRG  |   4 |    3.1     .3   -7.7      20    -20     -7     .09
       JPL  |   4 |    3.5   -2.0    2.0       9      4      3     .03
       MIT  |   4 |    3.3    1.8    5.5      -8     10     12     .20
       NGS  |   4 |     .1   -2.4    6.2      11     16     16     .24
       SIO  |   4 |   -1.4     .0   16.8     -16     17     80    -.12

       COD  |   5 |     .3    -.0     .5      10      5      4    -.22
       EMR  |   5 |     .7   -4.3   -1.6      -4     25      5     .08
       ESA  |   5 |    -.1   -1.2     .1      -6     24     12    -.08
       GFZ  |   5 |    -.0    -.0     .3       6      5      6    -.17
       GRG  |   5 |    4.0     .3  -16.2      29    -16     -8     .07
       JPL  |   5 |    1.3   -1.7    1.6      14     -8     20    -.04
       MIT  |   5 |    1.6     .7    7.4       2     14     14    -.01
       NGS  |   5 |    5.2   -5.8    1.0     -16    -15    -11     .17
       SIO  |   5 |   -1.2     .5   14.5      10      8     98    -.17

       COD  |   6 |     .4    -.1     .5      -2      1     -2    -.23
       EMR  |   6 |    1.2   -1.0   -1.5      -4     16     15     .01
       ESA  |   6 |    -.3    -.8    -.5     -17     13     22    -.12
       GFZ  |   6 |    -.0    -.3     .0       7     -8     15    -.14
       GRG  |   6 |    1.0    1.0  -11.2      26    -18     -3     .01
       JPL  |   6 |    6.2   -3.3    1.7      -2     -9    -11     .12
       MIT  |   6 |    5.4    2.5    6.7       0     17     21     .12
       NGS  |   6 |    6.0   -3.1    3.5       2     -5    -15     .13
       SIO  |   6 |    3.0    1.4   13.9      16    -63    111    -.09


11. 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.

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


ORBIT COMBINATION AND EVALUATION STATISTICS:                                    
--------------------------------------------                                    

Most combination statistics are with respect to the combined orbits and
consist of seven parts. The first, Table 1, summarizes all statistics for
the week. It contains means and standard deviations over the week of
satellite ephemeris and clock correction transformation parameters for
each centre (Table 1.2155.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2155.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 2.2155.[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 3.2155.[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 5.2155.0-6). 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 2155 summary.                       (Apr 25, 2021 - May 01, 2021)

Table 1.2155.a   GPS week: 2155   MJD: 59329.000-59335.000

         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  736|    0     0     0     0    -7     5  -.01    7    6 |    -613     136      6     84
        |    0     0     1     8    10    18   .01           |      23     204
emr   80|   -3     0     0     1     2    13   .10   12   12 |  178318    -154     14    104
        |    1     3     1    14     9     7   .02           |     544     612
esa  150|    0     0    -2    -1     2    15  -.05    7    7 |    -952     628      6     78
        |    0     0     1     9    10    16   .02           |     272     496
gfz  237|   -1     1     0     0     2    -8   .07   12   12 |       7      -9     11     68
        |    0     1     2    21    13    15   .03           |     249     532
grg  106|    1     0    -7     9     9    -9  -.08   10    9 |       9     -22      8    131
        |    0     0     3    11    13    24   .02           |     176     386
igr  n/a|    0     0    -1    -2   -10    -2   .02    5    4 |    4819    -364     10     76
        |    0     0     1    11    14    14   .01           |     971     667
jpl   80|    0     0     0     4   -21     5   .16    8    8 |    2295     -72      8     89
        |    0     1     1    16     8    11   .03           |     880     571
mit  355|    0     0     2    -3     4   -14  -.04    6    6 |    4291    -341     27   1633
        |    0     0     0    21    23    25   .01           |     945     701
ngs  208|    0     0     2    13    16   -14  -.06    9    8 |    -643     217    729   1525
        |    0     0     1     7    32    10   .03           |      74     194
sio  415|    0     0     1   -11    -6     9  -.05    9    8 |     ---     ---    ---    ---
        |    0     0     0    40    48    46   .02           |     ---     ---


Table 1.2155.b   GPS week : 2155   MJD: 59329.000-59335.000   

         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    3    4    4    3 |
   2  |    3    3    4    4    3    4    3 |
   3  |    3    3    3    3    3    3    3 |
   4  |    3    3    3    3    3    3    3 |
   5  |    3    3    3    3    3    3    3 |
   6  |    3    3    3    3    3    3    3 |
   7  |    3    3    3    4    3    3    4 |
   8  |    3    3    3    3    3    3    3 |
   9  |    3    3    3    3    3    3    3 |
  10  |    3    3    3    3    3    3    3 |
  12  |    3    3    3    3    3    3    3 |
  13  |    4    3    3    3    3    3    3 |
  14  |    3    3    3    4    3    3    3 |
  15  |    3    3    3    3    3    3    3 |
  16  |    3    3    3    4    4    4    4 |
  17  |    3    3    3    3    3    3    3 |
  18  |    5    5    6    6    6    5    6 |
  19  |    3    3    3    3    3    3    3 |
  20  |    3    3    3    3    3    3    3 |
  21  |    3    3    3    3    3    4    3 |
  22  |    3    2    3    3    2    3    3 |
  23  |    3    4    4    3    3    3    3 |
  24  |    4    5    5    4    4    4    3 |
  25  |    3    2    3    3    3    3    3 |
  26  |    3    3    3    3    3    3    3 |
  27  |    3    3    3    3    3    3    3 |
  28  |    3    3    3    3    3    3    3 |
  29  |    4    4    3    4    3    3    3 |
  30  |    4    7    5    5    5    6    4 |
  31  |    4    3    4    4    3    3    3 |
  32  |    3    3    3    2    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 2.2155.0   GPS week: 2155   Day: 0   MJD: 59329.000                            

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  740|    0    -1     0    -8    -1    42  -.00    7    6 |    -592     317      7     89
emr   80|   -2     4     0    -2     7    16   .06   11   11 |  178269    -256     13     81
esa  150|   -1     0    -3     0     2    30  -.07    7    7 |    -495      49      7     73
gfz  231|   -1     0     0   -31    -1    23   .04   11   10 |    -194     270     11     61
grg  108|    2     0    -5    16     1    41  -.07   10    8 |     263    -501     10    138
igr  n/a|    0     0    -3   -10    -5    20   .02    4    4 |    5144    -181     11     77
jpl   80|    0     0    -1    -6   -19    26   .17    8    8 |    2079     293     10    100
mit  355|    1     0     1    22   -40   -59  -.03    7    6 |    4674     -49     29   1482
ngs  213|    1     0     5    15    41   -16  -.08    9    8 |    -602     327    847   1526
sio  417|    0     0     1   -10    44   -70  -.03    9    8 |     ---     ---    ---    ---

Table 2.2155.1   GPS week: 2155   Day: 1   MJD: 59330.000                            

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  737|   -1     0     1    -7   -17    -5  -.02    6    5 |    -632     419      6     87
emr   80|   -2     3    -1    16     3     4   .10   12   12 |  178568     776     12     85
esa  150|    1     0    -2    13   -14    18  -.07    7    7 |    -962    1079      6     81
gfz  239|   -1     0     3    12   -11   -13   .03   11   10 |    -103     512     11     74
grg  109|    2     0    -3    19    -5    -5  -.07    9    8 |    -173     540      8    139
igr  n/a|    0     0    -1    13   -36    -8  -.00    4    4 |    5407     925     10     74
jpl   80|    0     1     1    12   -36    -4   .19   10   10 |    2885     922      9     78
mit  355|    0     0     1   -11     6    17  -.03    7    7 |    5087     967     23   1600
ngs  211|    0     0     0    20    24   -18  -.07    9    8 |    -620     399    816   1408
sio  424|    0     0     0   -58    57   -23  -.02   10    8 |     ---     ---    ---    ---

Table 2.2155.2   GPS week: 2155   Day: 2   MJD: 59331.000                            

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  734|    0     0     0    10   -16     5  -.02    7    7 |    -586    -127      6     88
emr   80|   -5    -5     3    -4    15    14   .10   14   14 |  178928    -193     15    100
esa  150|    0     0    -2   -15    -4    31  -.04    7    7 |    -802     517      6     79
gfz  239|   -1     1     2    -2   -15   -21   .08    9   10 |     359    -456     12     73
grg  106|    1     0    -8    -2    13    -6  -.07    9    8 |     212    -187      8    115
igr  n/a|    0     0     0   -13   -23     6   .04    4    4 |    5953    -583     11     80
jpl   80|    1     0     0    -6   -28     6   .16    8    8 |    3564    -512      9    109
mit  355|    1     0     2    19     0   -19  -.03    6    6 |    5437    -684     28   1968
ngs  211|    0     0     1    14    44    -6  -.09    8    8 |    -567     -70    562   1548
sio  422|    0     0     0    -4    11     4  -.06   10    9 |     ---     ---    ---    ---

Table 2.2155.3   GPS week: 2155   Day: 3   MJD: 59332.000                            

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  733|    0     0     0     1     7     2  -.03    6    6 |    -626     208      6     82
emr   80|   -1    -2     1    25   -15    21   .11   12   12 |  178556     -62     15    117
esa  150|   -1    -2    -2     6    -1    25  -.01    8    8 |   -1216    1060      7     80
gfz  238|    0     2     0    35     6    -6   .07   10   11 |    -174     172     13     73
grg  105|    0     1    -6    23    33   -15  -.10   10    9 |    -131      15      8    143
igr  n/a|    0     0    -1     9     0     8   .04    5    5 |    5443    -755     12     75
jpl   80|    1    -1     0    34   -16    12   .10    8    8 |    2891    -650      8     82
mit  355|    0     0     2   -30    38   -28  -.03    6    6 |    4769    -768     32   1732
ngs  199|    1     0     3    12   -48     4  -.03    9    9 |    -580     109    627   1644
sio  404|    0     0     0   -71   -41    -1  -.04    9    9 |     ---     ---    ---    ---

Table 2.2155.4   GPS week: 2155   Day: 4   MJD: 59333.000                            

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  736|    0     0     0     7     4    10  -.01    6    6 |    -633    -118      6     88
emr   80|   -1     0     1    -9     4     3   .10   12   12 |  178601    -524     17    135
esa  150|    0     0    -2    -1     6   -12  -.06    8    8 |    -800    -111      6     95
gfz  239|   -1     0    -1    -4     5   -10   .08   13   12 |     -51     -60     11     63
grg  102|    0     0    -6    -6    21   -19  -.13   11   11 |     -31      22      8    140
igr  n/a|    0     0    -2    -7    -9   -21   .03    5    5 |    4653    -540     10     75
jpl   80|    0    -1     1    -1   -13     4   .15    8    8 |    2175    -470      7     91
mit  355|    0     0     1     7     3    -7  -.04    6    5 |    3830    -526     21   1709
ngs  210|    0     1     1     0     7   -21  -.01    9    8 |    -755     135    713   1522
sio  419|    0     0     1     7   -17    38  -.06    8    8 |     ---     ---    ---    ---

Table 2.2155.5   GPS week: 2155   Day: 5   MJD: 59334.000                            

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  739|    0     0    -1     7   -13    -8  -.00    7    6 |    -637     123      6     80
emr   80|   -2     0     0   -17     0    20   .11   11   11 |  178053   -1152     16    120
esa  150|    0     0     0    -3    16     1  -.06    7    7 |   -1177     757      7     71
gfz  237|   -1     1     0     3    16   -13   .07   13   15 |     372    -957     11     69
grg  104|    1     0   -12    13     0   -20  -.07   11   10 |      66    -425      9    119
igr  n/a|    0     1     0     5    -1   -15   .01    4    4 |    4002   -1213     10     71
jpl   80|    0    -1     0     9   -19    -4   .17    9    9 |    1367    -320      9     83
mit  355|    0     0     2   -29     7   -11  -.05    7    7 |    3338   -1217     42   1499
ngs  209|    1     0     2    19     8   -14  -.03    9    9 |    -640     132    916   1661
sio  413|    0     0     2    18   -21    54  -.04    9    8 |     ---     ---    ---    ---

Table 2.2155.6   GPS week: 2155   Day: 6   MJD: 59335.000                            

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  739|    0     0     0    -8   -13   -10  -.00    7    7 |    -586     130      6     76
emr   80|   -4     0     0     1     4    10   .11   11   11 |  177253     330     15     96
esa  150|    0     0    -1    -9    14    10  -.06    7    8 |   -1217    1051      7     71
gfz  237|    0     2    -2   -17    18   -18   .11   14   16 |    -157     455     11     66
grg  109|    1     1   -10     3     3   -36  -.07   10    9 |    -142     376      9    126
igr  n/a|    0     0    -1   -13     4    -8   .02    5    5 |    3134    -201     11     81
jpl   80|    0    -1     2   -11   -17    -3   .17    8    8 |    1105     228      7     82
mit  355|    0     0     2    -3    15     8  -.05    6    6 |    2907    -110     19   1443
ngs  208|    0     0     2    11    39   -28  -.07    8    8 |    -739     488    626   1367
sio  411|    0     0     2    40   -79    61  -.09    9    8 |     ---     ---    ---    ---

       
       
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 3.2155.0   GPS week: 2155   Day: 0   MJD: 59329.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6   16    9   10    9    4    8    7    8    6    3 |    30   34   30   29   31   29   33   31   31   29    30
   2E |   10    8   10   14   11    6    7    6    7   10    3 |    34   30   27   28   37   29   28   28   30   31    29
   3  |    6   10    7    7    8    3    7    6    7    6    2 |    21   31   24   21   21   23   31   22   22   24    23
   4  |    7    7    8   10    8    6    7    7    7    8    2 |    75   77   76   80   78   75   77   79   80   78    77
   5  |    5    8    7   13    6    4    5    6    7    7    2 |    47   45   48   47   46   47   48   44   44   46    46
   6  |    8    9    8   13    8    6    9    5    8    8    3 |    35   37   34   33   36   33   34   34   32   33    33
   7E |   11   13    7    9    7    4    8    9    7    9    3 |   127  129  128  129  126  128  126  131  130  130   129
   8  |    5   10    8   11    6    3    9    8    7    8    2 |    22   26   23   24   22   22   26   22   22   21    22
   9  |    6    7    8    9    6    4    4    7    6    7    2 |    31   33   33   31   29   31   34   32   32   30    31
  10  |    6   12    7    7    6    3    8    5    8   10    2 |    30   34   30   32   30   31   36   29   27   27    30
  12  |    6   15    6    8    6    3    8    6   10    7    2 |    43   47   42   44   38   42   43   42   40   40    41
  13  |    6   12    5   11   19    5    9    7    7   11    3 |    26   34   25   29   29   28   33   30   27   32    27
  14  |    8    9    9    6   11    5    8    8   10   10    3 |    52   56   54   55   60   54   55   60   55   60    56
  15  |    6   10    7    9    7    5    7    9    8   11    3 |    47   46   47   47   46   46   46   42   42   40    44
  16  |    7   20    6    9   10    5    6    5    9    8    3 |    19   24   21   25   18   20   20   22   21   20    20
  17  |    7    8    6    8    6    4    6    8    6    7    2 |    32   33   31   33   33   31   35   33   32   33    32
 X18  |   10   21   13   17   15    4   10    9   16  ---    5 |    77   74   77   84   80   77   80   74   79  ---    76
  19  |   10   12    7   11    7    4    8    6    7    9    3 |    39   41   41   42   40   39   41   41   42   40    40
  20  |    6   11    7   10    7    4    6    8    8   10    2 |    22   24   22   24   22   22   24   22   20   22    21
  21E |    5   11    7   15   17    4    7    6    9    7    3 |    23   24   24   24   29   24   24   26   28   26    24
  22  |    4    7    8    6    8    4    6    7    7    7    2 |    24   28   26   24   24   26   29   25   27   25    25
  23  |    5   14    4   14    8    3   14    6    6   11    3 |    36   39   37   41   39   37   38   35   38   39    36
  24E |    6   11    8   21   10    3    7    6    7   10    3 |    36   30   32   33   32   33   32   33   32   32    32
  25  |    5   10    7    8    6    4    7    5    6    9    2 |    23   28   25   23   23   23   27   24   23   21    23
  26  |    5    7    8    7    6    3    7    4   11    8    2 |    19   24   22   26   19   20   24   21   23   18    20
  27  |    6   12    8   10    7    3    7    8    8    9    3 |    21   24   23   24   23   22   23   23   23   22    21
  28  |    7   11    5    9    7    3    8    5    9    8    2 |    31   37   35   35   34   33   37   34   36   36    34
  29  |    9   20    6   10   10    5   10    6   13   12    3 |    34   32   30   32   32   31   32   31   29   31    30
  30E |   10   11    8   14   17    5   10    9   14    7    3 |   168  167  170  174  166  168  156  165  167  167   167
  31E |    7    8    7   13   16    5    5    5   17   12    3 |   155  156  156  158  153  156  155  157  156  157   156
  32  |    4    8    6    6    7    3    6    6   13    5    2 |    38   39   38   38   39   37   41   37   39   35    37
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   11    7   11   10    4    8    7    9    9      |T   45   47   46   47   46   45   47   46   46   44    45
 WRMS |    6   11    7   10    8    4    8    6    8    8      |NE  33   36   34   35   33   33   36   34   33   33    33
 MEDI |    6   11    7   10    8    4    7    6    8    8      |MD  34   34   32   33   33   31   34   33   32   32    32

Table 3.2155.1   GPS week: 2155   Day: 1   MJD: 59330.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6   12    7    8   10    3    9    6    8    7    2 |    43   44   42   43   45   42   45   45   43   43    43
   2E |    6   10   10    8   11    5    8    8    6    7    3 |    44   42   35   44   46   39   40   41   42   44    41
   3  |    5    9    7    8    8    3   10    6    7    8    2 |    37   43   41   36   38   38   45   39   41   39    39
   4  |    8    9    7    9   11    4   10    9    7    8    3 |    68   68   69   71   72   69   69   73   72   68    70
   5  |    4    9    6   12    5    5    7    7    6    9    2 |    46   45   44   48   44   46   45   49   47   50    46
   6  |    6   10    6    9    8    5    9    6    9    7    2 |    56   57   56   56   55   54   56   58   54   58    56
   7E |    8   11    7   11    9    5    9    8    8   11    3 |    82   84   84   86   83   84   83   83   84   86    83
   8  |    5   10    8   10    6    3    8    6    6    9    2 |    35   40   39   38   38   36   40   39   38   38    38
   9  |    6    7    8    8    7    5    7    6    7    8    2 |    50   51   53   49   49   49   52   53   50   51    50
  10  |    5   10    7    6    5    4   10    7    8    8    2 |    44   48   47   47   46   46   52   48   47   44    46
  12  |    6   17    4    8    8    3    7    3    7    5    2 |    34   36   34   36   32   36   38   37   35   34    35
  13  |    6   14    6    9    7    4   11    8    5   12    3 |    36   44   37   40   37   38   42   42   40   41    39
  14  |    7   11    9    7   11    5    8    7   10   10    3 |    52   58   55   56   56   54   56   61   55   62    56
  15  |    5   11    7    8    7    6    8   10    5   13    3 |    51   53   50   52   49   52   52   50   50   47    50
  16  |    5   21    6    7    9    5    8    6    9    7    3 |    29   32   31   32   30   30   31   34   33   33    31
  17  |    5   10    5   10    9    2    7    7    8    8    2 |    47   50   47   48   49   47   49   51   48   51    48
 X18  |   10   20   12   20   15    5   12    9   10  ---    5 |    79   79   78   82   80   79   80   79   83  ---    79
  19  |    5   11    5    8    7    4    8    6    7   10    2 |    54   58   55   57   54   54   57   59   58   57    56
  20  |    5   13    6    6    7    4    8    7    8   12    2 |    41   41   41   42   41   42   43   43   44   41    42
  21E |    6   10    7   13   13    4    8    5    8    7    3 |    50   49   47   50   58   48   49   52   50   51    50
  22  |    5    7    7    7    9    3    7    5    5    5    2 |    41   44   43   41   42   43   46   43   45   42    42
  23  |    4   17    5   13    9    5   14    9    7   10    3 |    45   41   44   48   47   45   44   48   46   44    45
  24E |    7   10    8   34    9    6    8    8    8   14    4 |    28   27   27   38   30   28   30   30   27   30    28
  25  |    5    8    7    8    7    3    5    4    7    7    2 |    39   39   41   38   39   39   43   42   42   37    40
  26  |    4    7    8   12    7    2    6    5   10    7    2 |    33   36   37   37   34   34   37   38   36   35    35
  27  |    6   11    7    9    7    3    7    7   10    7    2 |    34   40   39   38   38   37   39   38   39   37    37
  28  |    6   12    5    6    8    3    7    6   10    5    2 |    46   50   46   47   47   47   50   51   50   52    48
  29  |    7   18    8    9    8    5    9    6   12   11    3 |    44   46   46   47   47   46   46   46   51   47    46
  30E |   10   25   10   17   19    9   27   17   18   25    6 |   222  223  224  227  218  222  195  224  220  224   222
  31E |    6   10    6    9   11    5    6    6   15    6    3 |    86   87   85   85   84   85   86   84   82   86    85
  32  |    6    6    6    9    7    4    9    6   10    6    2 |    53   58   57   57   55   56   62   56   60   54    56
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    6   12    7   11    9    4   10    7    9   10      |T   53   55   54   55   54   53   54   56   55   54    54
 WRMS |    5   12    7   10    8    4   10    7    8    8      |NE  43   46   45   45   44   44   47   47   46   45    45
 MEDI |    6   10    7    9    8    4    8    6    8    8      |MD  45   46   46   47   47   46   46   48   47   44    46

Table 3.2155.2   GPS week: 2155   Day: 2   MJD: 59331.000                            

        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   17    6    6   10    3    9    5    8   11    3 |    25   28   25   25   25   25   28   23   25   25    24
   2E |   10   12    9    8   13    4    7    9    8   10    3 |    33   31   27   33   37   29   30   28   28   31    30
   3  |    6   12    8   10    9    4   10    9    8   13    3 |    23   33   28   25   24   26   33   23   28   26    25
   4  |    7   14    7    8    8    3    9    7    7   10    3 |    57   54   53   59   54   55   55   56   57   61    56
   5  |    8   12    8    9    6    4    5    5    7    9    2 |    33   31   33   34   31   33   34   32   32   31    32
   6  |    8   13    7   13    7    4   11    5    9    9    3 |    24   24   24   23   22   23   25   21   27   22    22
   7E |    6   19    8    9   10    3    8    5   10    6    3 |    72   74   68   69   67   67   68   65   65   66    67
   8  |    5   10    8    8    6    3    8    5    8    6    2 |    25   29   27   26   26   25   27   23   23   26    25
   9  |    6   12    8    9    7    3    7    5    6    5    2 |    20   25   21   18   18   20   24   18   21   20    19
  10  |    6   13    5   10    6    3    8    6    8   10    2 |    19   26   20   22   20   21   25   18   20   20    20
  12  |    7   17    6   10    8    3    9    5    9   10    3 |    31   41   29   38   30   34   33   34   31   35    32
  13  |   10   14    7    9    7    4   10    6    6   11    3 |    25   38   28   31   30   29   36   31   31   31    30
  14  |    8   14    9    7   10    5    8    7    9    8    3 |    31   39   36   35   40   34   37   38   39   38    36
  15  |    7   11    8    6    7    6    7    7    7   13    3 |    33   34   31   34   32   32   33   27   30   27    30
  16  |    6   24    6    9    9    5    8    7    9   10    3 |    15   21   16   19   19   17   19   15   16   19    15
  17  |    8   10    7   10    9    4    6    4    6    8    2 |    23   31   24   27   27   25   29   24   26   24    25
 X18  |   10   28   16   19   16    4   10    8   16  ---    5 |    39   44   37   45   44   39   41   38   43  ---    39
  19  |    7   13    7    9    8    4    8    3    8    7    2 |    25   32   28   30   29   28   28   26   31   27    27
  20  |    4   14    7    7    7    4    6    7   10   10    2 |    14   17   16   18   14   16   17   15   16   15    14
  21E |    9   13    8    7   11    5    8    6    7    8    3 |    23   23   23   27   30   24   26   26   30   26    25
  22  |    7   11    7    7    8    4    9    8    7    5    2 |    16   23   20   19   16   19   24   17   22   18    18
  23  |    3   21    5   12    8    4   14    7    8   11    3 |    24   29   27   29   28   26   27   28   27   28    26
 X24E |   10  ---    9   28    9    8    7    9   10   16    5 |    28  ---   24   30   25   25   26   27   27   28    25
  25  |    5   12    6   11    7    3    7    4    7   12    2 |    17   26   22   21   19   20   24   19   15   20    18
  26  |    7   10    7   13    6    2    6    5    6    9    2 |    22   27   25   27   23   24   25   23   22   26    23
  27  |    6    9    9    9    9    4    8    7   10    7    3 |    20   25   25   23   25   22   23   20   19   21    21
  28  |    8   14    6    6    8    3    8    4    9    7    2 |    21   30   23   23   23   22   27   22   25   23    23
  29  |    7   17    7    9   10    4    9    4   12   10    3 |    25   25   24   27   24   25   25   23   25   23    23
 X30E |    9   22    8   14   13    8  ---    8   21   11    5 |    93   92   95   93   99   97  ---   90  104   92    94
  31E |    8   14   10   10   14    8    7   13   14   20    4 |   112  112  112  113  113  112  113  117  114  112   113
  32  |    5   10    6    9    6    3    6    6    7    9    2 |    22   28   22   23   23   23   25   20   21   24    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   14    7    9    9    4    8    6    8   10      |T   31   36   32   34   33   32   32   31   33   32    32
 WRMS |    7   14    7   10    8    4    8    6    8    9      |NE  24   30   26   27   26   26   28   25   26   26    25
 MEDI |    7   13    7    9    8    4    8    6    8   10      |MD  25   29   25   27   26   25   27   24   27   26    25

Table 3.2155.3   GPS week: 2155   Day: 3   MJD: 59332.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   11    8   10   13    5    7    7   10    9    3 |    27   27   26   26   30   25   28   25   26   25    25
   2E |    8   10   10   12   13    6    7    8   12   10    3 |    32   28   26   34   35   28   28   29   28   31    29
   3  |    5    9    7    7    9    6    9    6    9   10    2 |    26   32   30   27   27   28   33   25   27   25    27
   4  |    6   11    6    8    9    5    9    6    7   10    2 |    50   48   49   56   52   49   50   52   55   51    51
   5  |    6   10    9    7    9    5    7    5    8    9    2 |    41   40   42   40   41   42   42   38   41   40    40
   6  |    7   11    9   16   10    5   10    6   10    7    3 |    32   36   30   30   31   31   33   34   32   33    31
   7E |    7   22    8   17   12    6    7    4   10    8    3 |    57   62   57   65   58   58   56   56   62   56    57
   8  |    6    8    7    8    9    3    7    4    9    6    2 |    25   27   28   23   28   26   27   26   23   28    25
   9  |    8    8    8   10    7    4    9    5    8    8    2 |    27   28   28   24   26   26   27   25   23   25    25
  10  |    5    9    8   11    7    4    9    4    9   10    2 |    24   26   25   26   25   25   30   26   22   24    25
  12  |    5   16    8   10    7    5    9    5    6   11    3 |    37   41   34   39   34   36   38   35   35   37    36
  13  |    5   10    8   12   10    5   11    7    9    9    3 |    32   40   31   36   34   33   39   34   36   36    34
  14  |    7   12   10    9   11    7    9    9    9   12    3 |    33   35   32   35   39   33   35   38   36   38    35
  15  |    4    9    9   10    8    7    7    9    8    9    3 |    39   41   39   43   38   39   39   36   35   34    37
  16  |    6   22    6   12   12    7   10    4    9    9    3 |    21   24   20   23   19   20   21   21   18   22    20
  17  |    3    9    7    8    9    5    9    6    9   12    2 |    27   31   25   31   28   27   31   27   29   31    28
 X18  |   10   23   14   18   17    5   12    7   18  ---    5 |    33   34   33   38   41   34   39   35   36  ---    34
  19  |    4   14    8    9    8    4    9    5   10   10    3 |    27   31   27   28   27   25   29   26   25   28    26
  20  |    4   12    8    7    7    6    7    6    7   11    2 |    21   24   22   23   20   20   23   22   20   22    21
  21E |    6   10    9   11   10    8    7    6   13    8    3 |    42   41   42   44   49   41   41   44   39   43    42
  22  |    5    7    9    8    9    6    7    5    9    6    2 |    18   23   23   20   21   22   24   20   19   21    20
  23  |    5   14    6    8    8    4   12    7   12   12    3 |    21   20   21   23   25   20   22   23   23   21    21
  24E |   12   13    8   11    8    5    7    9    8   14    3 |    29   33   28   35   29   30   30   29   29   34    29
  25  |    5   10    7   10    8    3    5    4   10   10    2 |    26   30   27   28   27   25   29   26   26   27    26
  26  |    6    8    7    8    9    5    6    4    9    5    2 |    27   29   29   30   26   28   29   28   26   28    27
  27  |    6   10    8   11   12    4    8    5   11    8    3 |    21   24   26   22   26   22   24   23   20   23    22
  28  |    6   12    8   10   10    6   10    5    7    9    3 |    24   29   26   25   24   24   28   26   24   27    25
  29  |    7   18    8   11   12    6   11    4   14   12    3 |    25   24   21   29   27   24   24   23   25   28    24
 X30E |    8   10   10   27   17    5  ---    6   14    5    4 |   127  126  126  125  126  127  ---  127  123  129   126
  31E |    6   13    6   14   15    6   10    7   10    7    3 |    60   56   56   58   58   59   57   55   63   59    57
  32  |    5    8    7    8    8    4    4    4    6   10    2 |    23   25   22   21   21   22   26   21   20   20    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    6   12    8   10   10    5    8    6    9    9      |T   34   35   33   35   35   33   32   34   33   34    33
 WRMS |    6   12    8   11    9    5    8    6    9    9      |NE  27   30   28   29   28   28   30   28   27   28    28
 MEDI |    6   10    8   10    9    5    9    6    9    9      |MD  27   31   28   30   28   28   29   27   27   28    27

Table 3.2155.4   GPS week: 2155   Day: 4   MJD: 59333.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   18   10    8   18    5    7    6    7    9    3 |    45   50   46   46   49   46   48   46   51   46    46
   2E |    8   11    9   13   11    6    8    9   10    9    3 |    34   35   32   36   36   32   32   31   31   32    32
   3  |    4    8    9   12    7    4    8    6    8    6    2 |    29   35   29   29   28   30   36   27   34   29    30
   4  |    7   11    8   11    9    6   10    7    9   11    3 |    60   60   62   62   60   61   61   63   65   61    61
   5  |    6   10   11    8    7    4    7    6    6    8    2 |    36   35   37   35   35   36   37   33   34   33    34
   6  |    6   10    7   16    9    6    9    6    8    6    3 |    48   48   49   48   44   46   48   46   47   46    46
   7E |    4   17    9   12   12    5    6    5   10    6    3 |    47   49   46   45   47   47   47   47   43   46    46
   8  |    6    9    7    7    9    2    8    5    9    7    2 |    25   30   28   25   28   26   30   26   25   26    26
   9  |    5    7    8   11    9    3    8    4    7    7    2 |    32   33   34   31   31   32   35   31   35   30    31
  10  |    5   10    8    7    8    5   10    4    6   11    2 |    27   34   29   30   29   29   33   28   30   26    28
  12  |    7   16   11   11   10    6   10    6    9    6    3 |    33   38   35   37   35   33   34   32   29   33    32
  13  |    7   10    8    9   11    5    9    6    6   10    3 |    31   39   30   36   35   35   39   34   38   37    34
  14  |    7   10   10    8   11    6    7    6    9    7    3 |    37   42   41   40   46   41   42   44   42   44    41
  15  |    7   10    9    8    9    6    7    9    8   11    3 |    40   44   42   42   40   42   42   39   40   38    40
  16  |    6   22    5    7   14    6   10    5   12    8    3 |    21   28   22   25   19   23   23   21   27   21    21
  17  |    6    8    8   10   10    4    7    6    5    4    2 |    36   39   36   40   38   37   40   37   40   37    37
 X18  |   10   24   15   17   18    6   11    9   22  ---    5 |    50   52   54   58   57   52   55   52   61  ---    53
  19  |    6   13    7    9    7    4    6    6    7    7    2 |    38   42   40   41   39   39   40   40   42   39    39
  20  |    6   10    8    7    8    6    5    7    8   10    2 |    24   26   27   25   25   27   24   24   27   23    24
  21E |    5    9    9    9   14    4    7    5    8    8    2 |    29   30   27   28   30   27   29   28   30   28    28
  22  |    4    6    7    9    8    3    7    5    8    5    2 |    24   29   27   27   24   26   29   25   31   25    25
  23  |    5   12    4   13   10    5   13    6    8   11    3 |    28   30   28   33   31   28   29   28   31   29    28
  24E |    9   12    6   19   12    6    7    7   11   11    3 |    25   26   23   24   25   24   28   24   25   26    23
  25  |    5    9    7    9   10    4    6    4    7    7    2 |    28   33   32   28   30   29   32   28   29   28    29
  26  |    5   10    8   14   10    4    7    3    9    7    2 |    27   31   28   32   25   28   29   27   29   26    27
  27  |    6   10    7    7   15    3    8    5   10    7    3 |    22   27   24   24   26   24   26   22   25   23    22
  28  |    6   10    8   10    8    4    6    4    8    6    2 |    30   35   33   35   35   32   36   32   34   34    32
  29  |    6   17    7   11   14    5    9    3    9    8    3 |    30   30   29   31   30   29   31   28   31   31    29
  30E |    9    9    9   43   12    5   10    6   13    6    5 |    94   95   97   99   95   95  140   95   98   96    95
  31E |    6   12    6    8   15    4   10    7   11    7    3 |    87   86   85   86   88   87   87   89   84   88    87
  32  |    6    9    7    6   10    3    7    3    7   11    2 |    30   36   34   32   32   33   36   33   34   35    33
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    6   12    8   13   11    5    8    6    9    8      |T   37   40   38   39   38   37   41   37   39   37    37
 WRMS |    6   12    8   12   10    5    8    5    8    8      |NE  31   35   33   33   32   32   34   31   34   32    31
 MEDI |    6   10    8    9   10    5    8    6    8    7      |MD  31   35   33   35   35   32   36   32   34   32    32

Table 3.2155.5   GPS week: 2155   Day: 5   MJD: 59334.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8   18    8   13   10    7    7    6    7   16    3 |    64   72   63   65   66   64   69   67   63   71    65
   2E |   13   10   10   10   10    5    7   11   10   11    3 |    35   32   28   31   35   29   32   32   32   30    31
   3  |    5    9    6    9    8    3    9    6    8    7    2 |    26   32   29   26   26   28   33   26   31   26    27
   4  |    7    9    5    8    8    4   10    7    8   10    2 |    50   52   50   52   52   50   51   53   51   56    51
   5  |    7    9    8    9    9    5    9    7    6    9    2 |    27   30   24   28   26   27   31   25   27   24    26
   6E |    8   11    6   14    7    4    9    7    8   10    3 |    43   42   40   38   42   40   41   43   43   41    41
   7E |    7   11    8   11   15    5    8    6    9    6    3 |    64   65   68   67   65   65   66   64   70   66    66
   8  |    7   10    6    8    8    4    8    6    9    7    2 |    26   31   28   27   28   26   29   25   29   24    26
   9  |    5    7    7   11    6    4    6    5    5    6    2 |    20   24   19   15   19   18   24   16   19   19    18
  10  |    6   10    9    9    8    4   10   10    9   13    3 |    21   26   20   23   22   21   27   22   20   20    20
  12  |    5   14    6   10   11    4    9    5    9    9    3 |    27   30   26   29   21   27   29   26   25   27    26
  13  |    7   10    4   11    9    4   10    6    7    8    2 |    31   40   35   35   39   36   38   34   35   34    34
  14  |    6   10   10    8   11    5   10    6   10    7    3 |    27   29   29   32   35   27   28   29   32   32    29
  15  |    7    8    7   12    8    5    6    9    9   10    3 |    33   37   35   35   33   34   38   33   33   32    33
  16  |    6   18    6   11   13    7    9    6   10   10    3 |    14   16   16   18   15   15   16   15   16   15    14
  17  |    4    7    5    9   10    4    8    5    7    7    2 |    28   30   25   31   29   28   30   26   29   27    27
 X18  |   11   23   10   14   12    6   11   13   14  ---    5 |    61   63   65   64   56   63   65   62   60  ---    61
  19  |    5   13    6    8    8    3    9    6   10    7    2 |    33   35   34   34   32   33   34   32   39   32    33
  20  |    5   10    8   11    8    5    7    9   10   10    3 |    16   18   17   21   14   17   18   19   17   17    16
  21E |    7    8    9    8   22    4    6    7    6   10    3 |    33   30   31   32   35   31   29   30   33   29    30
  22  |    6    8    5    7    9    3    7    4    8    9    2 |    15   22   18   19   16   17   22   18   21   21    18
  23  |    6   11    5   10    8    4   13    9    8   12    3 |    32   35   35   36   34   34   35   35   34   35    33
  24E |   10   14    6   15   11    6    9    8   12    8    3 |    23   23   21   21   25   21   21   21   20   23    20
  25  |    5   12    7   10   11    3    8    8    7    8    3 |    19   26   22   21   18   20   25   22   17   22    19
  26  |    8    8    7   11   11    3    8    5    9    8    3 |    20   22   23   21   17   20   23   19   19   18    19
  27  |    6   11    6    8   15    4    8    7   11    8    3 |    18   22   20   18   22   18   20   17   17   18    17
  28  |    6   10    4    8    9    4    8    5    6    5    2 |    18   23   20   24   20   19   23   18   21   19    19
  29  |    7   15    7   10   13    5    9    5    8    9    3 |    31   31   30   32   30   29   32   30   29   33    29
  30E |   12   18    9   44   16    4   12    6   12    7    5 |   105  108  109  111  106  107   92  107  107  107   107
  31E |    7   13    6   14   15    3    7    7    9    7    3 |    98   99   97  100   96   97   97   98  103   99    98
  32  |    7    9    6    6   10    4    7    8    7   14    3 |    27   31   26   27   27   26   30   23   24   26    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   11    7   13   11    4    9    7    9    9      |T   35   37   35   36   35   35   37   35   36   34    34
 WRMS |    6   11    7   15   10    4    9    7    9    8      |NE  25   29   26   27   26   25   28   25   26   26    25
 MEDI |    7   10    6   10   10    4    8    6    9    8      |MD  27   31   28   31   29   28   30   26   29   27    27

Table 3.2155.6   GPS week: 2155   Day: 6   MJD: 59335.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    6   17    8   10   13    6    7    6    7    9    3 |    44   46   42   46   46   43   44   46   45   45    44
   2E |   10    8   10    8   10    4    7    8    7    7    3 |    38   32   30   36   36   32   32   31   30   32    32
   3  |    6    9    7    7    8    3    8    7    5    6    2 |    29   34   30   29   27   30   35   28   28   30    29
   4  |    8   11   11    8    8    6   10    6    8   10    3 |    75   72   71   74   75   72   73   78   77   77    75
   5  |    8    7    9    8    9    5    7    7    6    7    2 |    45   43   47   45   44   46   47   41   45   42    44
   6E |    9   13    6   19    7    4    9    5    8    6    3 |    32   34   30   27   31   28   33   32   30   33    30
   7E |    8   11   12   13   12    6    8    5   11    9    3 |   111  109  110  110  105  110  109  109  108  109   109
   8  |    7    9    7    8   10    4    9    5    8    8    2 |    26   30   28   25   26   26   29   25   26   24    26
   9  |    7    8    9    9    5    5    9    3    6    8    2 |    22   25   21   18   20   20   25   20   21   21    21
  10  |    7    8    8    7    7    4   10    7    5   10    2 |    24   28   24   25   23   24   27   24   22   23    23
  12  |    6   15    6    9   10    4   11    7    8    7    3 |    40   46   40   43   37   41   44   40   38   43    40
  13  |    7   10    7   10   18    6    8    7    7    8    3 |    35   43   38   39   40   38   42   39   44   40    39
  14  |    6   12    9    9   11    4    9    6    7   10    3 |    45   48   43   50   53   45   44   49   45   48    46
  15  |    6    7    6   10    8    6    7    8    5    9    2 |    46   51   48   51   48   48   49   45   45   43    46
  16  |    5   19    7    9   12    6    9    6   12   11    3 |    22   27   22   24   22   23   23   22   21   23    21
  17  |    5   11    6    8    9    4    8    7    7    8    2 |    27   29   25   29   28   26   31   26   28   27    26
 X18E |   10   27   13   17   29    9   12    8   19  ---    6 |    83   79   80   94   88   82   87   82   92  ---    84
  19  |    5   13    5    7    8    3    8    5    7    8    2 |    34   39   35   35   36   34   36   34   35   36    34
  20  |    7    8    7    9    6    5    6    7   10    9    2 |    17   19   18   20   14   18   19   18   19   17    17
  21E |    7   12   10    8   17    5    8    5    7    8    3 |    26   29   28   30   35   26   27   28   27   30    28
  22  |    5    7    6    8    8    4    6    6    8    6    2 |    18   21   18   18   17   18   23   18   20   19    18
  23  |    6   13    5    9    9    4   13    8    8   12    3 |    35   39   37   39   36   37   37   37   39   39    37
  24E |    9   11    6   11   12    4    8    6    9   10    3 |    35   32   32   38   33   34   34   33   32   34    33
  25  |    6    9    7    8    8    3    6    6    7    6    2 |    26   32   28   27   24   27   31   26   25   27    26
  26  |    6    9    7   10   10    3    5    6    9    8    2 |    27   30   28   31   24   28   29   27   25   27    27
  27  |    5    9    7    9   15    4    8    6    6    8    3 |    20   23   22   21   24   20   21   18   18   19    19
  28  |    7   14    5    8    8    4    7    5    6    8    2 |    24   28   24   28   26   25   29   24   26   24    24
  29  |    8   15    7   11   12    6   11    5    8   10    3 |    33   36   31   33   30   31   34   31   34   36    32
  30E |   10   11    8   55   12    7   11    8   12   11    4 |   126  127  128  134  128  128  121  127  132  128   127
  31E |    6   14    5   11   11    5    6    6    8    9    3 |   156  157  157  157  152  156  156  157  154  159   156
  32  |    6    9    8   10    8    4    6    6    6   13    2 |    31   36   31   34   32   30   35   29   29   29    31
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   11    7   14   10    5    8    6    8    9      |T   43   45   43   45   43   43   45   43   43   42    43
 WRMS |    7   11    8   16    9    5    8    6    8    8      |NE  31   35   32   33   32   32   34   31   32   32    31
 MEDI |    7   11    7    9   10    4    8    6    7    8      |MD  33   34   31   34   33   31   34   31   30   32    32



Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the estimated coordinates for the Latitude,
         Longitude and Height components. See Table 5 for the daily summary.

         CLK  - Satellite clocks used.
         EPO  - Mean number of satellite clock epochs available in the daily
                solutions.
         Units: mm.

Table 4.2155   GPS week: 2155   MJD: 59329.0-59335.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2975 |U   11     9    29 |U    9    13    27 |U   12    11    29 |
emr | emr 2962 |U   15    14    39 |U   16    24    42 |U   15    17    35 |
esa | esa 2976 |    12    11    31 |U    9    19    32 |    12    17    32 |
gfz | gfz 2976 |U   11     9    25 |U    7    12    30 |U   12    10    26 |
grg | grg 2974 |U   11    11    27 |U    8    15    29 |    14    13    32 |
igr | igr 2975 |    10     8    24 |     8    15    27 |    12    12    28 |
igs | igs 2973 |    10     8    24 |     9    15    27 |    12    12    28 |
jpl | jpl 2948 |U   11    11    34 |U   11    21    33 |U   16    20    35 |
mit | mit 2976 |U   10    10    24 |U    8    13    31 |U   12    10    27 |



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 5.2155.0   GPS week: 2155   Day: 0   MJD: 59329.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    11    10    29 |     8    15    38 |    11    10    28 |
emr | emr 2976 |    12    14    48 |    16    23    43 |    13    13    28 |
esa | esa 2976 |    11    11    31 |     9    18    43 |    10    14    32 |
gfz | gfz 2976 |    11    10    24 |     7    15    33 |    10    11    25 |
grg | grg 2976 |    12    14    24 |     7    18    35 |    15    11    29 |
igr | igr 2976 |    10     9    23 |     7    15    32 |    10    11    29 |
igs | igs 2976 |     9     8    23 |     7    14    36 |    10    10    28 |
jpl | jpl 2976 |    11    12    32 |    10    17    42 |    13    16    35 |
mit | mit 2976 |     9     9    27 |     8    13    40 |    10    10    27 |

Table 5.2155.1   GPS week: 2155   Day: 1   MJD: 59330.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    11     8    28 |     6    14    22 |     9    10    22 |
emr | emr 2976 |    12    13    34 |    11    22    39 |    12    11    30 |
esa | esa 2976 |    11    12    28 |     8    20    32 |    10    15    27 |
gfz | gfz 2976 |    11     9    23 |     5    14    24 |    10    10    19 |
grg | grg 2976 |    10    10    25 |     8    17    21 |    10    11    27 |
igr | igr 2976 |    10     8    22 |     7    15    24 |    10    10    22 |
igs | igs 2976 |     9     8    23 |     6    15    22 |     9     9    22 |
jpl | jpl 2976 |    12    15    31 |    10    21    29 |    15    15    33 |
mit | mit 2976 |    10    10    23 |     6    13    28 |    10     8    24 |

Table 5.2155.2   GPS week: 2155   Day: 2   MJD: 59331.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2975 |    13    12    30 |     9    10    27 |    12    12    25 |
emr | emr 2880 |    17    17    38 |    16    21    49 |    15    23    42 |
esa | esa 2976 |    13    13    32 |    10    15    33 |    13    18    32 |
gfz | gfz 2976 |    13    13    25 |     7     9    28 |    13    10    22 |
grg | grg 2976 |    14    15    30 |     7    11    29 |    15    12    30 |
igr | igr 2973 |    12    11    25 |     8    10    27 |    13    13    26 |
igs | igs 2955 |    12    13    23 |     8    13    28 |    13    12    25 |
jpl | jpl 2880 |    12    12    39 |     9    16    37 |    16    19    36 |
mit | mit 2976 |    13    13    26 |     7    10    30 |    13     9    24 |

Table 5.2155.3   GPS week: 2155   Day: 3   MJD: 59332.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    10     9    27 |  ----  ----  ---- |    13    12    27 |
emr | emr 2976 |    16    20    45 |  ----  ----  ---- |    15    19    35 |
esa | esa 2976 |    12    10    31 |  ----  ----  ---- |    13    17    30 |
gfz | gfz 2976 |     9    10    25 |  ----  ----  ---- |    14    10    25 |
grg | grg 2971 |     9    12    26 |  ----  ----  ---- |    15    11    29 |
igr | igr 2976 |     9     8    23 |  ----  ----  ---- |    13    13    26 |
igs | igs 2976 |     9     8    22 |  ----  ----  ---- |    13    12    25 |
jpl | jpl 2880 |    11     9    29 |  ----  ----  ---- |    16    22    32 |
mit | mit 2976 |     9    11    22 |  ----  ----  ---- |    12     8    23 |

Table 5.2155.4   GPS week: 2155   Day: 4   MJD: 59333.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    12     8    32 |    12    14    24 |    12    11    28 |
emr | emr 2976 |    14    13    31 |    18    23    42 |    15    18    36 |
esa | esa 2976 |    13    11    32 |    11    19    31 |    11    16    32 |
gfz | gfz 2976 |    11     8    33 |     8    13    24 |    11     9    25 |
grg | grg 2970 |     9    10    25 |     9    14    26 |    14    13    31 |
igr | igr 2976 |    11     8    26 |    11    15    25 |    12    13    26 |
igs | igs 2976 |    11     8    26 |    11    15    24 |    12    12    28 |
jpl | jpl 2976 |    12    11    39 |    13    23    27 |    15    21    33 |
mit | mit 2976 |    10    10    27 |    10    15    28 |    13    10    28 |

Table 5.2155.5   GPS week: 2155   Day: 5   MJD: 59334.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    11     6    27 |    12    13    27 |    13    10    36 |
emr | emr 2976 |    17    12    43 |    17    25    38 |    16    15    36 |
esa | esa 2976 |    12     9    34 |    10    20    29 |    13    17    38 |
gfz | gfz 2976 |     9     5    26 |     9    11    32 |    11     9    30 |
grg | grg 2976 |    11     7    29 |    10    15    33 |    16    13    41 |
igr | igr 2976 |    10     6    24 |    10    15    29 |    12    12    33 |
igs | igs 2976 |    10     5    26 |    10    15    27 |    14    12    36 |
jpl | jpl 2976 |    11    10    37 |    13    23    34 |    18    20    38 |
mit | mit 2976 |    10     6    23 |    10    11    31 |    12     9    34 |

Table 5.2155.6   GPS week: 2155   Day: 6   MJD: 59335.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    11     9    27 |    10    14    26 |    13    15    36 |
emr | emr 2976 |    15    13    35 |    18    29    41 |    18    21    40 |
esa | esa 2976 |    13    11    30 |     9    21    24 |    13    21    37 |
gfz | gfz 2976 |    11    10    23 |     6    12    37 |    13    13    33 |
grg | grg 2976 |    10     7    28 |     8    18    32 |    15    19    38 |
igr | igr 2976 |    10     9    24 |     8    17    23 |    13    16    34 |
igs | igs 2976 |    10     8    23 |     8    17    25 |    13    16    34 |
jpl | jpl 2976 |    11     9    34 |    11    27    29 |    17    27    38 |
mit | mit 2976 |    10    10    21 |     8    13    29 |    12    13    34 |


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 6.2155   GPS week: 2155   MJD: 59329.500-59335.500

                                                         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      47    -103     -4 |       9     24
            |       9      16      42      71      8 |       4
emr   uuuuu |       5     -11      61     259      9 |      15     30
            |      32      20     110     174      7 |       3
esa   uuuuu |      18      -3      56     143     -2 |      21     31
            |      10      11      35      46      4 |       2
gfz   uuuuu |     -13       1      -1     -36      2 |      19     31
            |      26      11     156     165      7 |       2
grg   uuuuu |     -16      -5      24    -190     -5 |       7     23
            |      13       6      33      65      7 |       3
igr   xxxxx |      12       3      47      -2      8 |      -6     25
            |       7       7      34      35      4 |       4
irf   xxxxx |      12       4     -32       0      3 |      -1     24
            |       6      13      30      31      3 |       2
jpl   uuuuu |      41       2      48      71      2 |      33     39
            |       9      17      43      48     10 |       3
mit   uuuuu |      -9      11     -80     -53      2 |      23     33
            |      15      16      63      87      7 |       2
ngs   uuuxu |     -30      -7    -119      87      1 |      11     27
            |      22      28     196     309      4 |       2
sio   xxxxx |      31      10    -347    -120     10 |      39     45
            |      43      31      41     234     12 |       3


Table 7.2155.0   GPS week: 2155   Day: 0   MJD: 59329.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       3      12     134     -59     12 |       4     20
emr   uuuuu |     -18      -9     -75      51     -3 |      12     23
esa   uuuuu |       5     -15      81     142     -5 |      23     27
gfz   uuuuu |     -54     -14     264    -234    -10 |      19     24
grg   uuuuu |     -11      -1      46    -143      7 |       4     18
igr   xxxxx |       4      12      42      45      6 |     -10     19
irf   xxxxx |      10     -17     -23      43     -2 |      -3     17
jpl   uuuuu |      38       8      22      89      0 |      31     35
mit   uuuuu |       5     -21    -137      37     -5 |      24     29
ngs   uuuxu |      -8      44    -304     558     -7 |      12     21
sio   xxxxx |      29     -49    -389     191      1 |      36     40

Table 7.2155.1   GPS week: 2155   Day: 1   MJD: 59330.500

                                                         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      22      27      25     -1 |       3     21
emr   uuuuu |     -24     -46     139      48      8 |      10     25
esa   uuuuu |      20     -17      29      99     -3 |      19     28
gfz   uuuuu |     -43       4     -84    -227     -4 |      15     27
grg   uuuuu |     -25       1      56    -101      4 |       3     20
igr   xxxxx |      21      -9      85     -25      9 |     -12     23
irf   xxxxx |      17      -5     -38      15      1 |      -5     22
jpl   uuuuu |      53      16      46     -21     -1 |      29     35
mit   uuuuu |      11       4    -124      53     -7 |      20     30
ngs   uuuxu |     -39      -9     -37     345     -1 |       8     24
sio   xxxxx |      49     -12    -379      88     -8 |      35     40

Table 7.2155.2   GPS week: 2155   Day: 2   MJD: 59331.500

                                                         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     -12       8    -147     -2 |       8     25
emr   uuuuu |      56     -10     -66     557      6 |      15     31
esa   uuuuu |      18       4      17     151      0 |      21     32
gfz   uuuuu |      -4      13    -118    -164      6 |      19     31
grg   uuuuu |     -23       5      32    -123     -7 |       8     25
igr   xxxxx |      22       6      44      22     15 |      -8     26
irf   xxxxx |      18      15     -83       8      1 |      -1     25
jpl   uuuuu |      36      -8     135     111      3 |      34     41
mit   uuuuu |     -20      29    -170     -69      0 |      23     34
ngs   uuuxu |     -36     -42     218     311      0 |      12     29
sio   xxxxx |      41      13    -360      86      5 |      37     44

Table 7.2155.3   GPS week: 2155   Day: 3   MJD: 59332.500

                                                         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 |     -15       9      30     -88     -6 |      12     27
emr   uuuuu |      45       5     -10     280     13 |      18     34
esa   uuuuu |      34       3      52     158      3 |      23     34
gfz   uuuuu |      -9       0    -211      98     10 |      22     34
grg   uuuuu |     -33      -7      12    -243     -8 |      11     26
igr   xxxxx |      13       5      18       1      5 |      -3     27
irf   xxxxx |       4      -3     -47       7      3 |       1     26
jpl   uuuuu |      40     -24      70      35    -16 |      37     43
mit   uuuuu |     -30      14     -34     -83      7 |      25     36
ngs   uuuxu |       1     -12      34     -80      2 |      13     30
sio   xxxxx |      61      34    -318    -223     25 |      41     47

Table 7.2155.4   GPS week: 2155   Day: 4   MJD: 59333.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -5     -13      20    -195     -7 |      13     27
emr   uuuuu |       5     -12     187     278      9 |      19     34
esa   uuuuu |      15      -7      89     185     -8 |      23     34
gfz   uuuuu |      11       3       6      29      5 |      22     34
grg   uuuuu |     -17      -7       8    -245    -10 |      11     26
igr   xxxxx |      11       1      -8      -5      5 |      -2     27
irf   xxxxx |       5      15     -36       2      4 |       1     26
jpl   uuuuu |      53      -8      30     112     11 |      35     42
mit   uuuuu |     -17      20     -62     -35      8 |      25     35
ngs   uuuxu |     -36      13    -206    -143      6 |      13     30
sio   xxxxx |     -37      42    -354    -381     18 |      43     50

Table 7.2155.5   GPS week: 2155   Day: 5   MJD: 59334.500

                                                         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     -17      64    -134    -10 |      10     26
emr   uuuuu |     -12      17      85     285      7 |      16     32
esa   uuuuu |       9      12      22      68      0 |      19     31
gfz   uuuuu |      -5     -12      99     108      0 |      19     32
grg   uuuuu |     -10      -9      54    -251    -10 |       7     25
igr   xxxxx |       6      -1      81     -64      6 |      -5     27
irf   xxxxx |      13      12      14     -15      8 |      -2     25
jpl   uuuuu |      29       6      16      95     14 |      32     39
mit   uuuuu |      -4      12     -10     -65      8 |      22     32
ngs   uuuxu |     -26     -14    -289    -183      6 |      10     27
sio   xxxxx |     -13      17    -270    -274     14 |      41     48

Table 7.2155.6   GPS week: 2155   Day: 6   MJD: 59335.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       3     -14      47    -120    -14 |      10     26
emr   uuuuu |     -14     -23     166     312     20 |      18     33
esa   uuuuu |      28       3     103     201      0 |      19     31
gfz   uuuuu |      14      16      35     135      5 |      19     32
grg   uuuuu |       5     -13     -38    -226     -9 |       6     25
igr   xxxxx |      10       7      66       9      9 |      -3     27
irf   xxxxx |      15      11     -11     -57      5 |      -1     24
jpl   uuuuu |      40      25      16      77      7 |      32     39
mit   uuuuu |      -9      22     -24    -210      6 |      22     32
ngs   uuuxu |     -65     -31    -247    -196      1 |      10     27
sio   xxxxx |      89      28    -360    -328     19 |      43     49


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