[IGSREPORT-28996] Wk 2231 IGS Final Orbits

acc acc at igs.org
Mon Oct 31 00:43:09 UTC 2022


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2231   (Oct 09, 2022 - Oct 15, 2022)

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:

igs2231[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs2231[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs2231[0-6].cls  IGS GPS clock combination summary report.
igs22317.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs22317.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   | AREQ ASCG FAIR GUAM IQAL MAC1 NICO VILL WTZR AREQ
                0  |  COD   | NICO WTZR
                0  |  EMR   | FAIR MCM4 TWTF YELL
                0  |  ESA   | GAMB MAW1 GAMB MAW1 YEL2
                0  |  GFZ   | 13 13
                0  |  GRG   | JFNG SGOC SVTL JFNG SGOC SVTL
                0  |  JPL   | BADG BADG IQAL MAC1
                1  |  COD   | AREQ CCJ2 CNMR COCO CPVG GUAM HARB MCM4 PIE1 SCUB
                1  |  COD   | SGOC TONG YELL COCO CZTG NTUS TONG
                1  |  EMR   | YELL
                1  |  ESA   | 12 CZTG DAV1 GOLD GUAM MKEA GOLD GUAM MKEA
                1  |  GFZ   | 13 13 AREQ CRO1 DAV1 HERS MKEA POHN AREQ CRO1 HARB
                1  |  GFZ   | HERS MKEA POHN
                1  |  GRG   | CPVG CRO1 CZTG GAMB SVTL CRO1 CZTG GAMB GUAM NKLG
                1  |  GRG   | SVTL
                1  |  JPL   | CCJ2 CNMR
                1  |  MIT   | PIE1
                2  |  COD   | CNMR CZTG GUAM HARB KOUR PIMO SGOC CZTG HARB ZECK
                2  |  EMR   | TSKB ZECK
                2  |  ESA   | 25 25 CZTG DAV1 GAMB CZTG DAV1 GAMB
                2  |  GFZ   | 13 13 DAV1 HERS DAV1 HERS POHN
                2  |  GRG   | 13 25 13 21 25 SVTL SGOC SVTL
                2  |  JPL   | ASCG COCO NTUS YKRO ZAMB ASCG CNMR COCO DAV1 KOUR
                2  |  JPL   | NKLG NTUS PIMO STHL YKRO ZAMB
                3  |  COD   | ADIS ASCG GRAC HYDE STHL UFPR USUD ADIS GRAC HYDE
                3  |  COD   | SCUB USUD
                3  |  ESA   | 25 25 DAV1 GAMB PDEL DAV1 GAMB SAVO
                3  |  GFZ   | 13 13 28 DAV1 HERS NYA2 ONSA DAV1 HERS NYA2 ONSA
                3  |  GFZ   | PDEL POHN
                3  |  GRG   | 13 25 13 25 DAV1 GAMB SVTL DAV1 GAMB SVTL
                3  |  JPL   | CUSV CZTG RIOP ABMF ASCG CUSV CZTG MCM4 PTGG RIOP
                3  |  JPL   | STHL UFPR
                4  |  COD   | 30 32 GAMB HYDE QAQ1 SCUB GRAC HYDE QAQ1 SCUB
                4  |  EMR   | 32 MDVJ
                4  |  GFZ   | 13 HERS NYA2 POHN HERS POHN
                4  |  GRG   | 13 21 13 21 MCM4 PTGG SVTL MCM4 PTGG SVTL
                4  |  JPL   | CUSV RBAY CUSV CZTG RBAY
                4  |  MIT   | 32
                5  |  COD   | HARB MAYG MCM4 HARB
                5  |  EMR   | CHUR CRO1 MCM4 YELL
                5  |  ESA   | KOUR GAMB KOUR
                5  |  GFZ   | 13 5 13 SCUB SCUB
                5  |  GRG   | 13 21 13 21 GLSV MAC1 SVTL GLSV MAC1 SVTL
                5  |  JPL   | BADG BADG MCM4 POHN
                6  |  COD   | OWMG SOFI OWMG
                6  |  EMR   | FAIR FAIR
                6  |  ESA   | FAIR PTBB YEL2 DAV1 FAIR SALU YEL2
                6  |  GFZ   | 13 13 HERS POHN SALU HERS POHN SALU
                6  |  GRG   | 13 MAYG SVTL HYDE MAYG SVTL
                6  |  JPL   | HYDE

 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
               ----+--------+---------------
                4  |  GRG   |  30

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

 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 |     .6    -.4     .7       0     -4      6    -.48
       EMR  |   0 |    3.8    9.7   17.0     -19      3    -28    -.37
       ESA  |   0 |    -.4   -1.8    -.0     -30    -19     52    -.44
       GFZ  |   0 |     .7    -.3     .0      -1    -28     23    -.53
       GRG  |   0 |    -.5   -1.9   15.5      -1    -11    -12    -.14
       JPL  |   0 |    1.3    5.5   21.8      -8     -3     10    -.27
       MIT  |   0 |    2.1    6.2   14.3      -2    -13      6    -.22
       NGS  |   0 |    2.3    -.1   26.2     -38     84     -1    -.24
       SIO  |   0 |   -2.6    9.2   12.3      74    -61     75    -.48

       COD  |   1 |     .3    -.2     .4      -3     -7      8    -.40
       EMR  |   1 |    9.5    6.5   10.7     -22     -2    -17    -.28
       ESA  |   1 |   -1.4   -1.2     .5     -15    -17     45    -.28
       GFZ  |   1 |    1.0    -.4    -.3      -7    -20     13    -.34
       GRG  |   1 |    5.1    -.3   12.1     -15    -15    -14    -.05
       JPL  |   1 |    4.8    2.7   10.9      -9     13    -14    -.10
       MIT  |   1 |    5.0    8.6   12.7      25     -5     -6    -.17
       NGS  |   1 |    2.7    4.0   17.1      11     62    -25    -.24
       SIO  |   1 |    1.9    9.1   11.1      80    -88    121    -.35

       COD  |   2 |     .2     .6     .5      13     -7    -13    -.39
       EMR  |   2 |    9.5    5.7   10.3     -37    -13    -22    -.41
       ESA  |   2 |    -.8   -1.6     .2      -6    -37     39    -.32
       GFZ  |   2 |     .2    -.9     .2     -18     -9      0    -.32
       GRG  |   2 |    5.3    1.0   10.8      -5    -19    -26    -.18
       JPL  |   2 |    6.1   -2.2   12.6       0      7    -11    -.23
       MIT  |   2 |    4.0   10.2   13.5      14    -27    -23    -.22
       NGS  |   2 |    2.0    1.0   16.9      -7     43     -7    -.35
       SIO  |   2 |    4.5   11.4   13.2     106   -113    139    -.55

       COD  |   3 |     .5    -.0    1.0      -7     -8      8    -.40
       EMR  |   3 |    5.6    5.7   17.9     -27      6    -28    -.45
       ESA  |   3 |   -1.3   -1.2     .4      -3    -31     31    -.35
       GFZ  |   3 |     .7    -.5     .0       1    -13     13    -.35
       GRG  |   3 |     .3    1.9    8.4      -7    -18    -21    -.10
       JPL  |   3 |     .9    -.4   15.9       0      7    -11    -.20
       MIT  |   3 |     .6    7.1   16.2      23      5    -29    -.28
       NGS  |   3 |    6.1    3.2   24.0     -39     74     -4    -.31
       SIO  |   3 |     .2    8.8   13.3      97    -87    154    -.56

       COD  |   4 |     .5     .0     .7       3     -5     -3    -.48
       EMR  |   4 |    7.8    2.9   25.2     -26     -4     -7    -.54
       ESA  |   4 |    -.2    -.2    1.2       4     -9     -1    -.45
       GFZ  |   4 |     .5    -.5     .5     -10     -6      5    -.42
       GRG  |   4 |    4.2    -.9   17.0       3     -9    -21    -.34
       JPL  |   4 |    6.1     .5   11.8     -10      7      2    -.41
       MIT  |   4 |    3.3    4.0   15.7      -6    -15    -16    -.27
       NGS  |   4 |    7.0    1.9   20.3     -34     54     13    -.47
       SIO  |   4 |    2.7    5.0   20.3      48   -152    119    -.74

       COD  |   5 |     .4    -.3    1.0       1      1      0    -.49
       EMR  |   5 |    5.8   12.6   14.3     -43      7    -21    -.24
       ESA  |   5 |   -1.0   -1.0    -.3     -17     -5     32    -.42
       GFZ  |   5 |     .7    -.3    -.3     -10    -19      2    -.52
       GRG  |   5 |    3.0   -4.3   20.5      -7     -4    -19    -.23
       JPL  |   5 |    3.6    2.2   15.5      -6      6      5    -.10
       MIT  |   5 |    2.8    5.5   11.8       4     -1    -16    -.23
       NGS  |   5 |    8.7    7.7   21.5       4     57     -5    -.25
       SIO  |   5 |     .6    5.5   20.5      56   -139    117    -.61

       COD  |   6 |     .3    -.2     .9       0      2      3    -.55
       EMR  |   6 |    5.5    8.5   18.8     -34    -13    -17    -.38
       ESA  |   6 |   -1.0    -.9     .2      -8    -11     27    -.49
       GFZ  |   6 |     .7    -.3     .5       4    -19     20    -.55
       GRG  |   6 |    1.8   -3.2   14.9       3     -5    -17    -.36
       JPL  |   6 |    3.2   -3.7   14.6       7      0     -5    -.38
       MIT  |   6 |    -.1    3.6   19.3      13     -3     -6    -.31
       NGS  |   6 |    6.1    -.7   19.8     -39     46     24    -.40
       SIO  |   6 |     .1    4.7   22.0      50   -154    115    -.72


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


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 1.2231.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2231.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 2.2231.[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 3.2231.[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 5.2231.0-6). 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 2231 summary.                       (Oct 09, 2022 - Oct 15, 2022)

Table 1.2231.a   GPS week: 2231   MJD: 59861.000-59867.000

         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  678|    0     0     0     8    -3    -5  -.01    8    7 |    -498    -161      6     92
        |    0     0     1    14    24    19   .01           |     155     221
emr   81|   -1     1     5     3     0   -29   .03   13   13 |  213357     222     13     85
        |    1     2     2    10    28    13   .04           |     730     533
esa  150|    0     0     2     3    16   -18  -.02    8    8 |   -1231     383      8     79
        |    0     0     1    17    11    17   .03           |     240     317
gfz  238|   -1     0     0    36     5   -31   .14   12   12 |      -2      44     13     81
        |    0     1     2    22    20    16   .04           |     173     203
grg  123|    2    -4     0    19     6     0  -.13   13   11 |     -51      69      9    121
        |    0     1     3    14     7    12   .03           |     188     295
igr  n/a|    0     0    -1     5    13    -7   .04    4    4 |   10502     334     11     94
        |    0     0     0    11    15    12   .01           |     778     417
jpl   80|    0     0     2    -8    11   -19   .15    8    8 |    -645     229      8     92
        |    1     0     1     9    16     6   .02           |     718     537
mit  363|    0     0    -2   -10     6   -30  -.06    7    7 |    9269     417     28   1799
        |    0     0     0    14     8    21   .01           |     729     457
ngs  209|    0     0     0    13    39    -6  -.08   11   10 |    -520    -145    770   1688
        |    0     0     1    23    32    18   .02           |     119     173
sio  610|    0     0    -6   -40   -72   124  -.05    9    8 |     ---     ---    ---    ---
        |    0     0     1    37    44    23   .02           |     ---     ---


Table 1.2231.b   GPS week : 2231   MJD: 59861.000-59867.000   

         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    3    4 |
   2  |    4    3    3    4    4    4    4 |
   3  |    3    3    3    4    3    3    3 |
   4  |    3    3    3    3    3    3    3 |
   5  |    3    3    3    3    3    3    3 |
   6  |    4    3    3    3    4    4    4 |
   7  |    3    3    3    4    4    3    3 |
   8  |    3    3    3    3    3    3    3 |
   9  |    3    3    3    3    3    3    3 |
  10  |    3    3    3    3    5    3    3 |
  11  |    6    5    6    5    5    5    5 |
  12  |    3    3    3    4    4    4    3 |
  13  |    3    3    3    3    3    3    3 |
  14  |    3    3    3    3    3    3    3 |
  15  |    3    3    3    3    3    3    3 |
  16  |    3    4    3    4    3    4    3 |
  17  |    3    4    3    3    3    4    3 |
  18  |    5    5    5    5    5    6    5 |
  19  |    3    3    3    4    3    4    4 |
  20  |    3    3    3    3    3    3    3 |
  21  |    4    4    4    4    4    4    4 |
  22  |    3    3    3    3    3    3    2 |
  23  |    3    3    3    3    3    3    3 |
  24  |    7    4    4    4    4    4    4 |
  25  |    3    3    6    4    3    3    3 |
  26  |    3    3    3    3    3    3    3 |
  27  |    3    3    3    3    3    3    3 |
  28  |    4    4    4    5    4    4    4 |
  29  |    3    3    3    3    5    4    3 |
  30  |    4    4    4    5    7    5    4 |
  31  |    3    3    4    3    4    5    4 |
  32  |    3    3    3    3    4    4    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 2.2231.0   GPS week: 2231   Day: 0   MJD: 59861.000                            

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  662|    0     1    -2     3    28    11  -.02    9    7 |    -575      16      7     89
emr   81|    0     2     9    -9   -57   -11   .01   14   14 |  212478     643     11     68
esa  150|    0     0     0     0     1   -24   .01    8    7 |   -1369     844      8     76
gfz  234|   -1    -1     0    25     1   -18   .10   11   12 |      30     326     13     75
grg  125|    1    -4     0     8     3    11  -.07   13   11 |    -381     574      8    105
igr  n/a|    0     0    -3     9     3    -4   .05    4    4 |    9523     768     11     92
jpl   80|    1     1     5    -4     3   -30   .18    9    9 |   -1507     664      9     73
mit  363|    0     0    -3    -7     1    -4  -.06    6    6 |    8603     853     28   1786
ngs  208|    0     0     4    34    -8   -11  -.07   10   10 |    -543     -52    798   1753
sio  606|    0     0    -6   -36    -1    76  -.08    8    8 |     ---     ---    ---    ---

Table 2.2231.1   GPS week: 2231   Day: 1   MJD: 59862.000                            

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  666|    0     0     0   -20    11   -10  -.03    8    7 |    -602     145      7     91
emr   81|   -1     0     3    12    15   -30   .05   13   13 |  212706     376     12     79
esa  150|    0     0     2    10    20    -9  -.01    9    9 |   -1603     467      8     85
gfz  240|   -1     0     4    59   -20   -49   .10   12   13 |     244    -196     13     82
grg  125|    2    -3     0    18     0     5  -.10   11   10 |       6     -83      8    100
igr  n/a|    0     0    -1    16     6    -8   .03    4    4 |    9885     292     11     92
jpl   80|    0     0     0    -7     4    -9   .15    8    8 |   -1293     396      7     82
mit  363|    0     0    -2     4     4   -28  -.06    7    7 |    8420     371     24   1814
ngs  208|    0     0     0    47    73   -42  -.07   10    9 |    -605      61    650   1463
sio  606|   -1     0    -4   -74   -80   115  -.07    8    7 |     ---     ---    ---    ---

Table 2.2231.2   GPS week: 2231   Day: 2   MJD: 59863.000                            

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  678|    0     0     0    10   -16   -41  -.02    8    7 |    -389    -196      8    101
emr   81|   -1     1     5     7     1   -43   .03   13   13 |  213222     170     13     96
esa  150|    0     0     3     0    14     9  -.00    8    8 |   -1333     670      9     79
gfz  238|   -1     0     1    72     1   -43   .14   12   12 |    -319     301     14     87
grg  123|    3    -3    -2    23     8   -21  -.12   12   11 |    -166     240      8    131
igr  n/a|    0     0    -1    19    26   -14   .03    4    4 |   10274     167     13     96
jpl   80|    0    -1     2     1    18   -13   .17    8    8 |    -758     178      8    108
mit  363|    0     1    -1    -8    -1   -29  -.06    6    6 |    9681     -33     34   1855
ngs  203|    0     0     0   -20    39     4  -.07   10   10 |    -487      59    906   1854
sio  616|    0     0    -5   -66   -55   142  -.07    8    8 |     ---     ---    ---    ---

Table 2.2231.3   GPS week: 2231   Day: 3   MJD: 59864.000                            

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  686|    1     1     1    22   -47    11  -.02    9    8 |    -212    -530      7    100
emr   81|   -1     0     4    -3    24   -38   .03   13   13 |  213232    -104     14     85
esa  150|    0     0     2   -10    27   -38  -.00    8    8 |    -890     -92      8     78
gfz  238|    0     0     0     7    39   -24   .17   13   13 |     -75      14     11     74
grg  123|    3    -4    -4     3     7    -8  -.15   12   11 |     241    -349      9    114
igr  n/a|    0     0    -1   -13    28   -11   .04    4    4 |   10172     256     12     93
jpl   80|   -2    -1     1   -13     1   -22   .14    8    8 |    -791    -103      9    121
mit  363|    1     0    -1    11    21   -28  -.07    7    6 |    8800     406     25   1367
ngs  209|    0     0     1    -3    29    -4  -.05   10   10 |    -265    -401    823   1538
sio  609|    0     0    -4   -22  -102   146  -.07    9    8 |     ---     ---    ---    ---

Table 2.2231.4   GPS week: 2231   Day: 4   MJD: 59865.000                            

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  685|    1     0     1    16   -10    -4  -.02    9    8 |    -517    -234      6     92
emr   81|   -3    -2     8    10    16   -47  -.03   14   14 |  213196    1033     16     83
esa  150|    0     0     2    32    29   -40  -.02    8    8 |   -1302     265      8     84
gfz  243|   -2     1     3    43    15   -52   .18   13   12 |      56      18     14     87
grg  117|    3    -5     0    47    14    -5  -.15   12   11 |     -29     171     10    120
igr  n/a|    0     0    -1     7    19   -27   .04    5    4 |   10620    1021     12     94
jpl   80|   -1     0     0    -1    38   -21   .14    8    8 |    -792    1039      9     96
mit  363|    0     0    -2   -25    -2    -8  -.05    6    6 |    9277    1171     32   2082
ngs  213|    2     0     0    18    83   -12  -.10   14   13 |    -579    -227    854   1677
sio  612|   -1     0    -6   -76  -121   135  -.02    8    8 |     ---     ---    ---    ---

Table 2.2231.5   GPS week: 2231   Day: 5   MJD: 59866.000                            

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  683|    0     0     0    15    14    12   .01    8    7 |    -510    -282      6     92
emr   81|   -1     4     3    12   -13   -19   .05   14   14 |  214201      57     15    108
esa  150|    0     0     0    12     0   -15  -.05    8    8 |   -1030     133      8     82
gfz  239|    0    -1     0    26   -13   -20   .18   12   13 |     -46    -164     15     81
grg  124|    3    -6     5    19    -5    15  -.16   14   12 |     -12     -99     10    143
igr  n/a|    0     0    -2     6   -13    10   .02    4    4 |   11368     -41     12    101
jpl   80|    0     0     2   -28   -10   -21   .13    8    8 |     161      50      8     90
mit  363|    0     0    -2   -24     7   -44  -.07    7    7 |    9601     252     28   1983
ngs  211|    1     0     1    22    47     9  -.11   12   10 |    -556    -206    691   1944
sio  609|    0     0    -8   -33   -32   121  -.03   10    9 |     ---     ---    ---    ---

Table 2.2231.6   GPS week: 2231   Day: 6   MJD: 59867.000                            

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  686|    0     0     1     9    -6   -14   .01    8    7 |    -683     -51      6     84
emr   81|   -1     5     3    -8    10   -19   .08   13   13 |  214467    -621     14     81
esa  150|   -1     0     2   -21    24   -11  -.05    8    8 |   -1095     394      7     72
gfz  235|   -1     0    -2    22    13   -13   .12   12   13 |      90      15     15     84
grg  124|    2    -6     3    15    17     4  -.15   13   12 |     -20      29     10    137
igr  n/a|    0     0    -2    -6    21     4   .04    4    4 |   11675    -124     11     90
jpl   80|    0     0     2    -7    22   -18   .11    8    8 |     462    -616      9     77
mit  363|    0     0    -2   -21    10   -66  -.06    7    7 |   10506     -98     26   1709
ngs  212|    0    -1    -1    -2     9    13  -.06    9    8 |    -608    -251    671   1593
sio  617|    0     0    -7    30  -110   134  -.04    9    9 |     ---     ---    ---    ---

       
       
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 3.2231.0   GPS week: 2231   Day: 0   MJD: 59861.000                            

        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 |    5   10    8   10   13    4    7    4    9    6    2 |    33   33   33   30   35   32   32   29   35   31    31
   2E |   11   19   10    8   11    4   11    7   10    8    3 |    28   32   24   24   28   24   28   26   28   29    26
   3  |    6   11    6    5   10    5    9    4    7    9    2 |    45   46   48   50   45   47   49   46   44   48    46
   4  |    7   12    5    7   10    5    9    9   10    7    3 |    77   77   77   77   77   78   77   79   81   81    78
   5  |    6    8    6    5    7    4    9    5    9    7    2 |    53   52   52   53   50   52   56   51   52   55    52
   6E |    5   14    5   18   15    3    9    6    7    9    3 |    43   49   45   48   48   44   45   46   46   45    45
   7E |   10   14    7    8   12    3    8    4   11    6    3 |   142  137  136  142  139  139  134  139  139  141   139
   8  |    6   11    8    6    7    3    6    5   11    5    2 |    31   33   31   33   30   31   31   31   31   32    30
   9  |    8   10    9    7   10    3    8    6    8   10    3 |    31   33   29   26   28   28   32   30   30   30    29
  10  |    5   10    6    8    7    3    7    6    6    7    2 |    37   39   38   36   34   36   40   33   35   35    36
  11E |   12   20   14   20   24    8   12   13   14   13    5 |    59   62   57   64   63   61   61   58   62   60    59
  12  |    6   18    5   10   12    4    7    4    9   10    3 |    56   63   55   54   47   55   57   55   51   56    54
  13  |    9   13    7   10   10    3   10    6    8    8    3 |    38   44   38   42   41   39   44   40   38   43    40
  14  |    8   11    9    9   10    5    8    5   10    8    3 |    67   62   59   63   66   60   61   64   66   67    63
  15  |    8   11    7   12    6    4    7    5   10    8    3 |    48   52   44   49   44   44   49   42   47   42    45
  16  |    9   21    5    9   12    2    8    5    9    7    3 |    26   27   24   25   23   24   26   22   26   24    23
  17  |    7   12    6   11   10    4    8    5    5    7    2 |    36   39   37   40   37   38   39   37   37   40    37
  18E |   13   15   10   21   20    6   12    9   11   14    4 |    48   51   50   50   46   49   51   47   49   52    48
  19  |   10   17    7   13   11    4    8    6    8    7    3 |    28   27   31   31   32   31   32   33   33   34    30
  20  |    6    9    5    6    8    4   10    6    8    7    2 |    33   32   32   34   30   32   31   32   33   32    32
  21E |    8   15    8    9   14    5   10    6   12    6    3 |    26   27   23   28   29   24   25   28   24   26    24
  22  |    6   13    7    9    7    5    8    9    5    8    2 |    42   44   40   39   43   41   43   42   40   45    41
  23  |    5   11    6    8   10    4   10    8    9    6    2 |    32   34   34   37   35   32   32   30   32   37    33
  24E |   17   17    9   28   34    5   16    7   27   11    6 |    46   44   42   33   40   40   45   40   44   41    39
  25  |    8   10    7    9    9    3   10    6    7   11    3 |    30   33   32   27   27   30   30   27   26   25    29
  26  |    9   11    7    8    7    4    9    6    7    8    2 |    41   39   38   36   37   39   42   36   41   40    38
  27  |    8   11    8   10    8    4    7    4    7    8    2 |    33   34   32   33   31   31   34   31   30   33    31
 X28  |    9   14    7   14    9    4   10    7    8  ---    3 |    20   29   22   26   20   22   26   20   20  ---    21
  29  |    8   14    6   10   12    4   10    4    9   10    3 |    29   30   31   35   32   32   31   31   34   34    31
  30E |   12   16    8   12   13    3    9    7   11    6    3 |   158  162  159  154  162  158   70  159  159  159   159
  31E |   11   19    5    8   10    5    7    6   10    7    3 |   195  196  194  192  196  195  194  195  194  197   195
  32  |    8   12   10   10    8    3    9    7    6    6    3 |    26   32   30   25   27   27   27   25   25   21    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   14    8   11   13    4    9    6   10    8      |T   51   52   50   51   50   50   49   50   51   52    50
 WRMS |    7   14    7   12   11    4    9    6   10    8      |NE  39   40   38   39   38   38   40   38   38   40    38
 MEDI |    8   12    7    9   10    4    9    6    9    8      |MD  37   39   38   36   37   38   40   36   37   40    37

Table 3.2231.1   GPS week: 2231   Day: 1   MJD: 59862.000                            

        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   11    9    7   12    2    8    6    6    5    2 |    27   23   25   23   27   23   25   23   24   25    23
   2E |    8   11    9    8   11    5   10    9   10    8    3 |    23   24   20   21   22   20   22   20   25   22    21
   3  |    9   10    6    7    8    3    6    5    7    5    2 |    29   28   28   30   25   27   31   27   25   28    27
   4  |    5   11    9   14   11    5    8    7    9    7    3 |    55   58   55   54   60   56   59   58   60   60    57
   5  |    6    9    5    6    9    3    8    6    8    9    2 |    23   26   22   29   22   25   28   25   27   26    24
   6E |    7   13    6   10   12    4    6    7   10    6    3 |    29   32   32   27   29   29   31   30   32   31    29
   7E |    9   12    9    9    6    4    7    7   11    8    3 |    82   79   79   79   81   80   82   81   81   81    81
   8  |    5    8   17   10    8    5    7    7    9    6    3 |    19   22   25   23   19   20   22   20   21   23    20
   9  |    5    9    8   11    9    4    5    6    7   10    2 |    29   31   29   28   26   28   31   29   28   28    28
  10  |    6   10    6    9    8    3    8    5    8    8    2 |    19   25   22   22   17   19   24   17   20   20    19
  11E |   12   21   13   18   25    5   11   12   14   10    5 |    47   50   48   51   54   48   49   45   47   48    47
  12  |    6   18    7    8   13    3    8    8    8    7    3 |    33   38   34   34   28   33   36   34   32   35    33
  13  |    7   12    7    8    8    3    9    5   11    5    2 |    21   32   23   23   22   24   31   23   21   25    23
  14  |    7   12    9   11   10    5    6    5   10    9    3 |    51   49   50   50   52   49   49   52   52   54    50
  15  |    8    9    5   10    8    4    7    6   12    3    2 |    42   43   40   43   39   39   43   37   45   41    41
  16  |    7   20    6   17   10    4    7    5   10    8    3 |    17   17   18   21   15   16   17   15   16   21    15
  17  |    6   10    7   25   10    3    7    8    6    9    3 |    24   27   25   35   22   23   26   22   25   27    24
  18E |   12   19   12   24   19    5   12    9   13   12    5 |    33   39   36   45   35   37   38   33   35   39    35
  19  |    8   17    5   12    9    4    6    8    8   11    3 |    20   19   21   21   19   19   22   20   19   24    19
  20  |    7    9    5    7   10    3    9   10    7    6    2 |    20   22   17   20   18   18   20   16   18   20    18
  21E |   10   16   12   10   11    4    6    5   14    5    3 |    15   22   18   20   21   16   18   19   23   23    17
  22  |    5   12    6    8    7    4    7    7   12    8    3 |    25   31   26   28   27   27   30   24   31   28    26
  23  |    5   12    8    8   11    4   10    7    8    7    3 |    18   19   21   25   21   17   16   20   17   24    18
  24E |   11   14    7   13   21    5   12    7   11   12    4 |    42   40   37   36   36   37   39   38   39   38    37
  25  |   10    8    8    9    9    4    8    8    9    6    3 |    22   29   28   22   22   25   27   25   24   26    25
  26  |    8   11   10    8    5    5    6    5   10    8    2 |    24   26   26   22   22   23   27   21   20   28    23
  27  |    5   10   12   12    8    6    8    7    7    5    3 |    21   23   23   21   20   19   23   20   17   22    20
 X28  |    7   14    6   12   11    3    8   11   11  ---    3 |    18   24   20   18   16   18   24   18   19  ---    18
  29  |    9   14    4    9   12    4    7    7   11    8    3 |    17   18   17   21   20   19   18   19   22   20    18
  30E |   10   12    8   18    7    4    9    8   13   10    3 |    96  100   92  100   96   94   47   93   95   93    95
  31E |   13   14    6    7   12    3    6    5   10    7    3 |   123  125  123  123  124  123  123  124  122  126   123
  32  |    6   10    9    8    6    4    8    7   10    6    2 |    23   26   26   22   20   22   24   20   24   22    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13    9   12   11    4    8    7   10    8      |T   33   36   34   35   33   33   34   33   34   36    33
 WRMS |    7   13    9   13   10    4    8    7    9    7      |NE  25   28   27   27   25   25   28   25   26   28    25
 MEDI |    7   12    7    9   10    4    8    7   10    8      |MD  24   27   26   25   22   24   27   23   25   27    24

Table 3.2231.2   GPS week: 2231   Day: 2   MJD: 59863.000                            

        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 |    9    8   11   12   12    3    8    7   11    8    3 |    29   27   30   24   29   27   30   26   28   29    26
   2E |    9   11    9   11    9    5   10    8    7    7    3 |    22   25   20   22   18   20   22   23   22   22    20
   3  |    9    8    6    8    9    3    8    5    7    6    2 |    44   45   44   44   42   44   46   43   44   47    43
   4  |    5   10    7   11   11    7    8    6    8    8    2 |    59   60   59   61   63   59   61   63   61   64    61
   5  |    6    9    7    8    8    4    7    5    5    8    2 |    41   41   40   43   37   40   42   42   42   43    40
   6E |    8   12    4   19   11    5    7    5    8   10    3 |    31   34   33   37   33   32   32   32   33   35    32
   7E |   10   10   11   14    9    6    5    7   11    6    3 |    70   69   69   72   72   72   71   71   70   68    70
   8  |    6   10    8   11    7    3    7    7   13    6    3 |    30   28   32   32   25   29   31   28   31   31    29
   9  |    8    8    7   12   10    5    7    6   11   13    3 |    26   29   27   27   24   24   30   24   24   26    25
  10  |    6    7    6   10    8    4    7    6    7   11    2 |    31   35   34   32   30   31   37   30   36   35    32
  11E |   11   22   16   23   26    6   11    9   20   10    5 |    43   46   44   52   50   44   45   41   45   41    43
  12  |    6   18    5   10   10    3    7    5    8    7    3 |    42   48   40   41   35   41   45   39   43   42    41
  13  |    7   13    8    9   10    4   11    7   10    9    3 |    36   42   35   41   37   37   42   38   39   39    37
  14  |    9   12    8   10   10    4    8    4   10    8    3 |    38   36   37   39   40   37   40   40   38   44    38
  15  |    8   11    7    9   11    3    7    6    9    6    2 |    62   65   60   60   56   61   62   59   56   58    59
  16  |    6   20    6   10   13    3    7    5   10    8    3 |    21   26   21   28   21   21   26   21   25   27    22
  17  |    7   12    6   10    8    4    7    5    9    8    2 |    30   32   35   37   31   34   35   33   32   37    32
  18E |   12   19   11   25   18    6   11    7   11    9    4 |    34   38   37   44   34   36   37   35   36   39    35
  19  |    8   18    4   11    9    4    8    7    7   12    3 |    27   29   33   34   30   31   32   32   33   36    31
  20  |    8   10    6    7    9    5    9    7    8    8    2 |    24   26   26   28   23   26   26   26   25   27    25
  21E |    9   18   11    7   23    4    8    7    9    5    3 |    27   29   24   22   31   23   25   25   25   28    23
  22  |    4    9    6    9    7    3    7    5   10    8    2 |    35   39   38   38   39   37   40   38   36   42    37
  23  |    5   12    7   10    8    4    9    6    7    7    2 |    27   30   30   33   29   28   28   29   29   34    29
  24E |   11   15   10   15   20    6   10    7   10   15    4 |    33   35   32   25   27   32   32   31   31   35    30
 X25  |    8   13   18  ---    9    6  ---   10   10  ---    5 |    24   32   36  ---   25   27  ---   28   32  ---    28
  26  |    8   10    8    9    6    3    8    5    7    7    2 |    35   33   37   34   33   34   37   34   33   39    34
  27  |    8   10    7    9    9    3    8    7   15    4    3 |    28   28   27   28   24   25   28   26   28   27    26
 X28  |    9   12    7   18    9    5    9    9    9  ---    3 |    20   24   24   24   20   25   28   24   24  ---    22
  29  |    7   16    7    7   12    5    9    8    8    9    3 |    26   28   31   32   28   29   30   29   31   29    28
  30E |    8   12    9   18    9    6    9    6   11    7    3 |    91   93   87   90   89   87   65   87   90   87    88
  31E |   10   11    6    9   13    4    6    5   16    9    3 |   117  118  119  119  117  118  118  119  121  120   118
  32  |    5   11    9    9    9    2    8    6    8    5    2 |    26   32   31   23   24   26   27   26   28   22    27
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13    8   12   12    4    8    6   10    8      |T   38   40   39   40   38   38   40   38   39   41    38
 WRMS |    7   13    8   12   11    4    8    6   10    8      |NE  33   35   35   36   32   33   36   34   35   37    33
 MEDI |    8   11    7   10    9    4    8    6    9    8      |MD  31   33   34   34   31   32   35   32   33   36    32

Table 3.2231.3   GPS week: 2231   Day: 3   MJD: 59864.000                            

        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 |    7    9    8   15   14    3    8    7   10    8    3 |    30   29   29   29   33   27   30   26   29   29    28
   2E |    9   13    8    7   13    5   12    9    8   10    3 |    35   33   29   30   30   30   33   31   29   33    31
   3  |   11   13    7   11   12    4    8    5    9   13    3 |    35   42   36   35   33   35   38   35   37   37    35
   4  |    6   12    8   10   12    6    9    8    8    5    3 |    56   53   52   51   59   53   55   61   56   58    56
   5  |    7    9    8    9    9    4    8    7    9   11    3 |    49   45   45   48   40   47   48   45   48   44    46
   6E |    8    9    5   16   12    5    8    6    7    9    3 |    30   31   29   30   30   28   29   29   29   29    28
   7E |    9   11    9   12   15    5    6    5    8   14    3 |    66   66   68   69   72   68   68   68   70   72    68
   8  |    7   12    8   13    9    5    6    6    9    7    3 |    29   35   33   33   30   31   32   31   32   32    31
   9  |    8    9    7   13   10    6    6    4    7   10    3 |    26   28   25   20   24   23   28   24   25   22    24
  10  |    6    9    6    9    6    4    7    6   10   10    2 |    32   33   30   34   29   32   35   31   35   32    31
  11E |   11   20   14   18   23    6   11    7   20    8    5 |    44   48   43   51   49   45   45   43   44   43    43
  12  |   10   17    6   10   11    4   10   10    7    8    3 |    50   54   47   52   44   48   52   45   45   49    48
  13  |    8   13    7   11   11    3   10    5   11    7    3 |    30   37   31   35   34   32   34   32   35   33    32
  14  |   11   12    9   10   10    5    7    4   10    9    3 |    40   41   35   35   39   36   37   41   40   45    39
  15  |    7   11    5   10   10    3    6    4    8    7    2 |    49   53   43   53   40   46   50   44   45   42    46
  16  |    8   21    5   10   14    4    7    6   11    8    3 |    18   25   20   26   22   20   22   21   22   24    20
  17  |    8    9    8   15   10    4    7    6    7    9    3 |    31   31   31   33   29   30   33   32   28   33    30
  18E |   13   17   10   23   17    6   11    6   12   10    4 |    31   33   32   38   33   33   34   30   31   34    31
  19  |    9   14    5   13    9    3    8    8    7   14    3 |    28   27   29   30   27   29   29   32   30   32    29
  20  |    7   11    7    8   13    3    8    8   11    6    3 |    25   26   26   29   21   25   25   25   28   24    24
  21E |    8   17   10   12   16    4    8    5    8    8    3 |    25   30   23   27   30   24   25   25   27   29    24
  22  |    5   12    5   11    8    4    6    6   12    9    3 |    28   32   26   32   34   29   31   30   29   30    29
  23  |   11   10    6   12   10    5    9    9    8    8    3 |    21   19   16   28   22   19   19   22   21   22    19
  24E |    9   14    7   20   18    4    8    8   13   13    4 |    41   41   38   38   33   37   40   36   38   36    36
 X25  |    8   11    8  ---    8    5  ---    8    8  ---    3 |    33   33   33  ---   29   31  ---   28   32  ---    31
  26  |    8    9    9   12    9    4    7    5   12    7    3 |    28   30   31   33   29   31   30   29   28   32    29
  27  |    8   10    8   15   10    5    5    5   10    5    3 |    27   32   31   33   30   30   32   29   30   29    29
 X28  |   11   13    7   24   10    5    9    9   15  ---    4 |    22   27   22   26   18   20   25   20   23  ---    20
  29  |    8   17    5    9   13    4    9    7    6   10    3 |    23   18   20   22   20   20   21   21   24   22    20
 X30E |    9   17   11   15   13    5  ---    7   17   11    4 |   132  137  133  136  134  133  ---  133  135  134   134
  31E |    9   12    6   11   13    4    8    6    6    8    3 |    84   88   84   87   87   86   84   88   87   86    86
  32  |    7    9    9   13    9    4    9    8    9    8    3 |    26   28   26   19   25   26   25   25   26   18    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13    8   13   12    4    8    7   10    9      |T   38   40   37   40   37   37   36   37   38   39    37
 WRMS |    8   13    8   13   11    4    8    6   10    8      |NE  32   34   31   33   30   31   33   31   32   33    31
 MEDI |    8   12    7   12   11    4    8    6    9    8      |MD  30   33   31   33   30   31   32   31   30   32    31

Table 3.2231.4   GPS week: 2231   Day: 4   MJD: 59865.000                            

        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 |    7   13    7   16   16    3    8    4   10    9    3 |    35   36   35   34   40   35   36   31   31   34    33
   2E |    7   23   11    9   13    4    9    8   15    8    4 |    27   34   23   27   26   26   24   24   33   26    25
   3  |    9   11    7   11   11    4    7    4    9    6    2 |    52   55   51   54   50   52   53   49   53   53    51
   4  |    5   10    7   11   11    5    8    6    6    7    2 |    54   52   53   51   56   55   57   58   54   59    55
   5  |    9   10    7   10    7    3    7    7    9    8    3 |    39   42   39   42   38   40   42   36   41   35    38
   6E |   10    7    6   17   16    6    6    6   14    7    3 |    35   39   39   39   40   38   39   36   39   38    37
   7E |    8   15    9   13   11    5   10    6   11    6    3 |    89   87   83   90   90   87   85   87   91   87    87
   8  |    8    9   10    8    6    4    6    5    7    7    2 |    33   33   36   35   30   33   34   29   31   30    31
   9  |    6    9    8   18   11    4    6    5    8    7    3 |    25   30   25   23   24   24   28   21   23   24    23
  10  |    8   12   11   10    7    6    8    8   42    9    5 |    36   42   38   38   36   38   40   36   59   36    37
  11E |   14   19   13   20   22    8   11    7   13   11    5 |    46   48   46   49   49   48   48   44   48   46    46
  12  |    8   20    8   10   14    4    7    7   10    8    3 |    42   46   43   40   34   42   44   38   38   40    40
  13  |    7   17    7   11    9    3    9    6    7    7    3 |    41   46   37   44   40   41   44   41   40   40    40
  14  |   10   14   12   10   10    6    7    4   10    7    3 |    48   50   47   48   49   46   47   48   51   50    48
  15  |    6   12    6   14    8    5    8    7   12    5    3 |    53   57   51   56   50   52   55   47   54   50    51
  16  |    8   22    6   11   11    4    7    4    6    8    3 |    26   29   28   31   29   29   31   28   27   30    28
  17  |    9   11    7    9    9    4    6    5    8    7    2 |    36   37   33   37   32   35   34   33   37   35    34
  18E |    9   20   10   29   17    7   10    6   16   10    4 |    40   45   43   45   40   43   44   40   42   43    41
  19  |   11   18    4   10    8    4    7    6    8   10    3 |    33   35   34   36   32   34   34   32   37   31    33
  20  |    8   10    7    8   10    4    6    8    9    9    3 |    24   29   25   26   24   25   27   23   23   24    24
  21E |    9   15   10   10   17    6    7    6   12    6    3 |    26   27   24   24   29   24   24   23   25   24    23
  22  |    5    8    6   12    7    5    8    5   11    7    2 |    41   43   40   48   42   43   44   39   44   42    42
  23  |    6    9    7   13    8    3    8    6   10    6    2 |    33   37   36   41   37   37   35   36   38   38    36
 X24E |    8  ---    9   16   17    6   10    6   12   14    4 |    27  ---   26   29   26   26   29   25   24   29    25
 X25  |    8   11    8   11    9    4    9    8   10  ---    3 |    34   36   32   32   30   34   34   30   32  ---    32
  26  |    6    9    8   12    6    3    9    5    5    9    2 |    35   39   37   36   37   38   41   37   36   38    37
  27  |    7   11   10    8    8    5    6    6    7    5    2 |    26   30   29   30   27   26   29   25   25   27    26
 X28  |    8   12    7   21    9   10    8   10   10  ---    4 |    30   33   28   29   27   28   30   28   30  ---    28
  29  |    6   17    6    9   12    4    9    8   33    8    4 |    34   34   32   38   34   35   35   32   43   33    33
 X30E |   12   25    9   18   60    9  ---    5   26   22    6 |   152  162  156  157  176  159  ---  157  152  166   157
  31E |   16   14    5   10   20    3   12    7   14    8    4 |   143  144  141  141  146  143  141  143  145  140   142
 X32  |    7   13   12  ---    9    7  ---    7    8  ---    4 |    34   40   36  ---   34   35  ---   34   36  ---    35
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   14    8   13   12    5    8    6   14    8      |T   44   48   44   46   45   45   42   43   46   46    44
 WRMS |    8   14    8   12   11    4    8    6   13    8      |NE  36   39   36   38   36   37   38   35   38   37    36
 MEDI |    8   12    7   11   10    4    8    6   10    8      |MD  35   39   36   38   36   37   36   36   38   38    36

Table 3.2231.5   GPS week: 2231   Day: 5   MJD: 59866.000                            

        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 |    7    9    8   17   11    3    8    7    7   10    3 |    33   31   33   32   35   31   34   30   31   33    31
   2E |   10   11    9    9   14    4    9    8    9   11    3 |    31   30   30   30   28   29   31   32   27   34    30
   3  |    8    9    9    9   11    4    7    8    8    9    3 |    58   61   59   59   56   57   60   61   58   57    59
   4  |    6   11    8   10   11    5    7    7    9    8    3 |    54   53   54   56   52   55   54   60   59   61    56
   5  |    7    9    7    9    9    4    5    5    9    8    2 |    34   36   32   36   32   32   36   32   33   31    33
   6E |   10   11    6   18   14    5    7    8   11    9    3 |    44   46   44   46   42   42   43   46   45   44    43
   7E |    9   14    7   10   10    6    7    5   15    7    3 |   110  111  109  109  112  109  113  110  107  111   110
   8  |    7    8    9   11    9    3    6    7    7   11    3 |    25   28   29   28   24   27   30   25   26   29    27
   9  |    8    9    8   10    8    5    6    6    7   14    3 |    24   30   27   28   22   25   29   26   25   29    26
  10  |    6   10    7   11    8    4    9    7    6   11    3 |    30   36   31   29   29   30   35   30   30   32    30
  11E |   10   20   14   20   24    6   11    9   19   10    5 |    51   58   54   59   55   53   54   53   52   53    52
  12  |    8   22    7   12   13    3    5    8   12    9    3 |    34   40   34   39   28   34   35   33   34   33    33
  13  |    6   12    6   12    7    3    9    6   11    9    3 |    40   46   40   43   39   40   47   41   42   42    41
  14  |   10   12   12   12   12    4    7    5   10    8    3 |    47   47   43   45   45   44   45   47   48   49    45
  15  |    5   13    5   11    5    4    7    5   13    8    2 |    40   45   38   39   37   37   41   38   37   36    38
  16  |    6   21    5   10   15    4    8    7   10    9    3 |    22   24   26   27   26   24   28   25   26   28    25
  17  |    9   17    9   13    9    4    7    7   11   11    3 |    30   31   32   32   29   30   32   32   33   34    31
  18E |   11   18    9   26   22    6   10    7   29   12    5 |    41   44   44   52   40   43   44   44   48   45    42
  19  |   11   20    7   11   11    4    7    9   15   12    4 |    30   32   34   35   31   31   33   33   38   34    32
  20  |    8    8    6    9   10    4    7    6    9    7    2 |    25   25   25   26   21   24   24   25   24   26    24
  21E |    8   14    8   10   20    4    7    7    7   12    3 |    26   28   25   24   31   24   24   27   28   31    25
  22  |    4    6    5   10    6    4    9    5   10   10    2 |    34   35   34   36   33   34   36   36   33   39    35
  23  |    6   10    6   10   11    3    9    7    8    9    3 |    28   29   29   34   30   29   29   32   28   35    30
  24E |    7   12    6   14   23    5    9    7   11   12    3 |    25   30   25   28   27   25   27   26   25   28    25
  25  |    8   11    7    9   11    3    8    8    8    7    3 |    26   31   28   24   23   26   26   26   24   26    27
  26  |    6   10    8   11   10    3    9    6    8    8    3 |    27   30   30   25   26   27   32   28   27   32    28
  27  |    5   10    9    9   10    5    6    6    9    7    2 |    24   27   28   27   25   27   27   24   27   28    25
 X28  |    7   18    7   22   11    3    8    9   11  ---    4 |    24   31   24   22   23   24   30   26   25  ---    25
  29  |    7   21    6   11   15    4    8    8   17    9    3 |    28   28   28   31   27   29   31   30   29   29    28
 X30E |   12   20   11   10   18    8  ---    8   23    8    5 |   177  185  177  180  174  180  ---  182  180  180   179
  31E |    5   14    7    9   28    7   10   16    9   20    4 |   171  172  171  167  174  171  172  175  173  178   172
 X32  |    7   13    9    9    7    4    7    9   21  ---    4 |    28   34   30   35   24   28   39   27   25  ---    28
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13    8   12   14    4    8    7   12   10      |T   44   47   45   46   43   44   42   45   45   48    44
 WRMS |    7   13    8   13   12    4    8    7   10    9      |NE  32   35   33   34   31   32   35   33   33   35    33
 MEDI |    7   12    7   10   11    4    7    7   10    9      |MD  30   32   32   34   30   30   34   32   31   34    31

Table 3.2231.6   GPS week: 2231   Day: 6   MJD: 59867.000                            

        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    9    9   18   18    4    6    9    9    8    3 |    30   29   31   29   33   29   31   28   27   27    28
   2E |   10   17    8    9   17    4    8    8    7   10    3 |    25   29   21   22   25   22   23   24   25   26    23
   3  |    8    8    8   11   11    4    6    6    9    7    3 |    51   53   51   55   52   52   53   50   51   52    51
   4  |    4   10    9   12   11    6    8    9    9    6    3 |    70   67   67   67   68   66   69   75   70   73    70
   5  |    5    8    7    7    7    4    6    8    5    7    2 |    49   51   53   51   50   51   53   51   50   50    51
   6E |   10    9    6   16   12    5    8    9    7   10    3 |    39   41   37   41   39   38   40   41   40   40    39
   7E |    8   19    9   11    9    4    7    5    8    9    3 |   129  127  128  127  131  128  128  131  128  128   128
   8  |    6    9    7    8    8    3    6    6    6    8    2 |    25   28   28   28   26   26   28   26   25   27    26
   9  |    5    8    7   12   10    5    7    8    8   11    3 |    21   26   20   20   17   19   25   21   21   22    20
  10  |    6    6    5   10    7    3    8    7    4    9    2 |    32   36   32   34   32   32   37   32   32   34    33
  11E |   10   19   14   18   24    5   11   11   16   11    5 |    49   55   50   53   54   50   50   49   52   49    49
  12  |    6   18    6    7   11    4    7   10    9    8    3 |    50   56   49   49   42   49   49   43   44   50    47
  13  |    7   14    7   11    9    5    9    6    7    9    3 |    40   48   40   40   42   41   45   41   40   41    41
  14  |   10    8   10   13   11    4    8    8    9    8    3 |    68   65   61   65   67   62   63   66   66   66    64
  15  |    8   11    6    9    6    5    6    6    7    6    2 |    58   61   53   56   53   54   57   51   55   50    54
  16  |    7   21    6   10   13    4    8    6    8    8    3 |    22   25   25   24   26   23   25   24   22   24    23
  17  |    9    9    7   13   10    3    6    6    6    8    2 |    32   34   33   34   31   32   35   34   34   36    33
  18E |   12   19   12   23   18    6   12    6   19   12    5 |    41   43   42   52   39   44   44   44   46   44    42
  19  |   11   17    5   11   11    3    6    9    7   13    3 |    32   33   34   37   33   33   35   35   36   37    34
  20  |    9    7    9    9   10    3    7    8    7    5    2 |    20   21   18   20   17   19   20   20   20   20    19
  21E |    7   14    9    9   24    4    8    7    5   11    3 |    23   26   21   22   34   21   23   22   21   21    22
  22  |    3    8    4   11    8    4    7    4    7    7    2 |    36   38   37   38   38   37   39   37   37   39    37
  23  |    6   11    7   10   11    4    9    8    8    8    3 |    29   31   29   34   33   30   30   32   29   35    30
  24E |    5   17    5   16   24    4    8    7   12   11    4 |    35   36   32   33   26   33   33   30   31   33    31
  25  |    7   10    7    8    9    5    8    9    8    9    3 |    30   33   30   29   26   31   31   27   27   25    29
  26  |    7    9    8   10   10    4    8    5    7    8    2 |    32   32   31   31   31   32   33   32   29   32    31
  27  |    6   11    7    9    9    4    6    5    6    6    2 |    24   27   25   23   24   22   26   23   22   23    23
 X28  |    9   11    6   16   10    5    8    9   12  ---    3 |    28   36   28   32   29   30   31   29   32  ---    29
  29  |    6   17    4    8   11    4    9    6    8   11    3 |    24   23   22   24   23   23   24   23   25   25    23
  30E |   12   12    9   14   20    4   10    5    9   14    4 |   145  153  142  151  148  147  135  146  152  151   148
  31E |    9   15    6   14   14    6   11   10   10   11    3 |   198  198  196  194  199  196  195  201  197  198   197
 X32  |    6   11    8    9    8    4    7   10    7  ---    3 |    25   28   24   23   21   22   26   25   24  ---    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13    8   12   13    4    8    7    9    9      |T   47   49   46   48   47   46   48   47   47   49    46
 WRMS |    7   13    8   13   12    4    8    7    8    9      |NE  36   38   35   37   35   35   37   36   35   38    35
 MEDI |    7   11    7   11   11    4    8    7    8    8      |MD  32   36   32   34   33   32   35   32   32   36    33



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 4.2231   GPS week: 2231   MJD: 59861.0-59867.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3070 |U   11    11    25 |U    9    17    50 |U   11    14    26 |
emr | emr 3057 |U   20    15    44 |U   14    22    54 |U   18    17    48 |
esa | esa 3072 |    15    19    32 |U   10    20    47 |    12    10    31 |
gfz | gfz 3030 |U   15    17    36 |U    9    16    42 |U   10    13    34 |
grg | grg 3065 |U   13    19    34 |U    9    16    43 |    12    15    34 |
igr | igr 3050 |    12    12    24 |     9    17    44 |    10    11    27 |
igs | igs 3038 |    12    11    24 |     8    17    44 |    10    11    27 |
jpl | jpl 2989 |U   16    16    37 |U   10    24    50 |U   13    11    33 |
mit | mit 3072 |U   11    10    24 |U    9    16    44 |U   10    14    28 |



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 5.2231.0   GPS week: 2231   Day: 0   MJD: 59861.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9     9    22 |    13    16    54 |     9    11    28 |
emr | emr 3072 |    20    14    32 |    19    31    47 |    17    22    55 |
esa | esa 3072 |    13    17    30 |    15    21    58 |    10     9    37 |
gfz | gfz 3072 |    10    12    24 |    13    17    48 |    12    11    44 |
grg | grg 3072 |    10    13    25 |    10    17    35 |     9    14    28 |
igr | igr 3072 |    11    11    22 |    12    19    43 |     9     9    31 |
igs | igs 3063 |    10     9    21 |    10    17    43 |     9     9    30 |
jpl | jpl 3072 |    14    15    33 |    14    27    45 |    15    16    39 |
mit | mit 3072 |     9     8    18 |    11    16    40 |     9    13    29 |

Table 5.2231.1   GPS week: 2231   Day: 1   MJD: 59862.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10    15    28 |     9    20    46 |    13    16    30 |
emr | emr 3072 |    22    16    50 |    13    21    53 |    18    17    56 |
esa | esa 3072 |    16    26    34 |    10    20    41 |    14    12    37 |
gfz | gfz 3072 |    12    19    34 |     8    17    36 |    12    15    34 |
grg | grg 3072 |    10    19    26 |     7    16    39 |    13    15    34 |
igr | igr 3072 |    12    17    28 |     8    18    39 |    13    13    33 |
igs | igs 3072 |    12    17    28 |     8    18    42 |    13    13    34 |
jpl | jpl 3072 |    17    23    37 |    10    26    51 |    16    11    41 |
mit | mit 3072 |    11    14    28 |     9    19    41 |    12    15    36 |

Table 5.2231.2   GPS week: 2231   Day: 2   MJD: 59863.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3069 |     9    10    27 |     7    20    46 |    10    15    23 |
emr | emr 3070 |    16    14    43 |    12    18    45 |    18    17    49 |
esa | esa 3072 |    14    19    31 |    10    19    41 |    12     9    31 |
gfz | gfz 2975 |    14    17    35 |     7    17    41 |    10    15    31 |
grg | grg 3062 |    12    18    34 |     7    19    46 |    11    16    30 |
igr | igr 3063 |    10    10    21 |     7    18    41 |    10    12    28 |
igs | igs 3020 |    10    10    23 |     8    17    41 |    10    12    27 |
jpl | jpl 2976 |    14    17    39 |     9    23    47 |    10    11    34 |
mit | mit 3072 |     8     9    22 |     7    18    40 |     9    14    25 |

Table 5.2231.3   GPS week: 2231   Day: 3   MJD: 59864.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3069 |    11     9    26 |     7    18    53 |    11    15    24 |
emr | emr 3070 |    16    15    45 |    13    19    58 |    19    15    45 |
esa | esa 3072 |    15    19    32 |     8    19    51 |    10     8    28 |
gfz | gfz 2976 |    15    17    31 |     9    17    47 |     9    11    32 |
grg | grg 3063 |    11    18    26 |     8    18    49 |    15    16    56 |
igr | igr 3054 |    11    10    25 |     8    18    48 |     9    10    25 |
igs | igs 3024 |    11    10    25 |     8    17    50 |     9     9    25 |
jpl | jpl 2880 |    17    15    41 |    12    25    52 |    11    10    30 |
mit | mit 3072 |    11     8    26 |     9    16    48 |    10    12    26 |

Table 5.2231.4   GPS week: 2231   Day: 4   MJD: 59865.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3068 |    11    11    19 |     9    18    52 |    11    12    27 |
emr | emr 2973 |    23    14    44 |    14    23    70 |    21    14    44 |
esa | esa 3072 |    16    18    28 |     9    22    44 |    13     9    32 |
gfz | gfz 2976 |    16    15    34 |    11    20    39 |     9    13    35 |
grg | grg 3057 |    14    17    32 |    10    15    44 |    11    15    31 |
igr | igr 2949 |    12    11    21 |     7    18    40 |    11    11    29 |
igs | igs 2948 |    13    10    22 |     7    18    38 |    11    10    27 |
jpl | jpl 2880 |    17    12    37 |     9    23    43 |    14     9    32 |
mit | mit 3072 |    11     9    21 |     8    20    49 |     9    12    30 |

Table 5.2231.5   GPS week: 2231   Day: 5   MJD: 59866.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    12    10    24 |    10    14    51 |    13    18    26 |
emr | emr 3072 |    23    18    44 |    12    23    55 |    19    17    46 |
esa | esa 3072 |    18    16    34 |    11    19    49 |    12    12    28 |
gfz | gfz 3072 |    23    24    53 |     8    13    39 |    13    18    40 |
grg | grg 3066 |    18    25    52 |     9    12    45 |    15    20    33 |
igr | igr 3072 |    14    11    26 |     9    16    50 |    11    16    25 |
igs | igs 3072 |    14    11    27 |     9    15    49 |    12    15    24 |
jpl | jpl 2976 |    16    13    36 |    10    21    57 |    16    13    31 |
mit | mit 3072 |    14    11    29 |     9    13    47 |    12    19    29 |

Table 5.2231.6   GPS week: 2231   Day: 6   MJD: 59867.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    12    12    27 |    10    13    50 |    12    12    22 |
emr | emr 3072 |    19    14    51 |    13    19    51 |    17    14    38 |
esa | esa 3072 |    16    18    32 |    10    18    43 |    11     8    26 |
gfz | gfz 3072 |    16    15    40 |     9    14    41 |     9     9    26 |
grg | grg 3066 |    14    21    45 |     9    12    41 |    10    12    24 |
igr | igr 3072 |    12    12    26 |     9    14    46 |    10    10    22 |
igs | igs 3072 |    13    12    26 |     9    14    45 |     9     8    21 |
jpl | jpl 3072 |    15    14    36 |     9    20    54 |    12     8    24 |
mit | mit 3072 |    12    11    25 |     9    13    41 |     9    11    25 |


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 6.2231   GPS week: 2231   MJD: 59861.500-59867.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      11      -8     -25     -15      2 |      12     17
            |      26      22      65      44      5 |       2
emr   uuuuu |       5      27     -89     125      4 |      23     28
            |      24      32     142     100     14 |       2
esa   uuuuu |     -13      -1     -18     -12     -5 |      29     33
            |       9      17      79      65      6 |       2
gfz   uuuuu |      -9     -29     -50      -1      0 |      29     33
            |      21      19      96      34      7 |       3
grg   uuuuu |      12     -13     -29       4      2 |       7     14
            |      24      15      56      97      3 |       2
igr   xxxxx |      -7      -4      -2     -13      0 |       2     15
            |      12       9      49      42      7 |       2
irf   xxxxx |      -3       9       2       0     -4 |       3     16
            |      15      10      27      17      3 |       2
jpl   uuuuu |     -11      -4      79     -22     -4 |      51     52
            |      11      22      37      44      9 |       2
mit   uuuuu |       6      27       7     -40     -1 |      22     26
            |      19      22      54      60      4 |       2
ngs   uuuuu |       1     -17      53      63     -7 |      17     23
            |      30      23     155     106      4 |       2
sio   xxxxx |      91     -64    -263    -169      8 |      68     69
            |      54      41     153     103      8 |       3


Table 7.2231.0   GPS week: 2231   Day: 0   MJD: 59861.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -27       4     -37     -12     -3 |      11     16
emr   uuuuu |      25     -21      66     283     -4 |      23     29
esa   uuuuu |      -1       2     103    -114      6 |      28     32
gfz   uuuuu |     -17      -5    -183       9      8 |      25     29
grg   uuuuu |     -16      16     -80    -166      1 |       5     13
igr   xxxxx |      -2      -3      -1     -44     11 |      -1     13
irf   xxxxx |      16       9     -38      19     -2 |       2     16
jpl   uuuuu |      -9     -50     107     -27     -1 |      52     52
mit   uuuuu |      27      47     -33      62     -1 |      21     25
ngs   uuuuu |       7     -29      12      40     -1 |      16     22
sio   xxxxx |      77     -65    -283    -251      1 |      64     65

Table 7.2231.1   GPS week: 2231   Day: 1   MJD: 59862.500

                                                         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 |      -6      28       5     -62     -5 |      13     17
emr   uuuuu |       8      29    -156      23      6 |      23     30
esa   uuuuu |      -1      -9      79     -21     -2 |      31     35
gfz   uuuuu |      21     -36     -87      32     -4 |      28     32
grg   uuuuu |      14      -4      22     -11      8 |       7     15
igr   xxxxx |       2     -11      60     -70      4 |       2     15
irf   xxxxx |      11       9      13       1     -8 |       4     17
jpl   uuuuu |       3       8      15     -88    -16 |      54     55
mit   uuuuu |      10       3      -2      11     -6 |      23     27
ngs   uuuuu |     -51     -32      38     195     -5 |      18     24
sio   xxxxx |      81     -95    -394    -225      1 |      67     68

Table 7.2231.2   GPS week: 2231   Day: 2   MJD: 59863.500

                                                         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       3      -3      23      1 |       9     15
emr   uuuuu |       6      32     -62      68      5 |      20     25
esa   uuuuu |     -18      12     -25      44     -2 |      28     32
gfz   uuuuu |     -15     -64     -33       1      6 |      25     30
grg   uuuuu |       7     -15       3     -14     -1 |       5     13
igr   xxxxx |     -27     -13      30     -45      1 |       0     14
irf   xxxxx |     -28      -2      17       8      0 |       0     16
jpl   uuuuu |      -5      -1      58      18      6 |      51     52
mit   uuuuu |      -1       0     -25     -61      2 |      20     24
ngs   uuuuu |       7      17      78     -44     -6 |      15     22
sio   xxxxx |      41    -119      24    -280      9 |      64     65

Table 7.2231.3   GPS week: 2231   Day: 3   MJD: 59864.500

                                                         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 |      53     -41     -23      17      6 |      10     15
emr   uuuuu |     -25      78    -345     106     -4 |      21     26
esa   uuuuu |     -26      17     -66     -74    -10 |      29     32
gfz   uuuuu |     -45     -18     128     -54      2 |      28     31
grg   uuuuu |      54     -25      58     126      1 |       7     11
igr   xxxxx |     -18      11     -21      46      1 |       1     13
irf   xxxxx |     -17      14      41      -1     -6 |       2     13
jpl   uuuuu |      -7     -10     118     -19     -9 |      51     52
mit   uuuuu |     -26      14      62     -37     -5 |      21     25
ngs   uuuuu |      43     -10     -26      64     -5 |      16     21
sio   xxxxx |      11     -97    -144    -227     -1 |      66     67

Table 7.2231.4   GPS week: 2231   Day: 4   MJD: 59865.500

                                                         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     -16      72     -70      9 |      14     20
emr   uuuuu |      41      47     -48     230    -19 |      26     29
esa   uuuuu |     -18     -27    -107      12     -5 |      32     35
gfz   uuuuu |      -7     -40     -18       9      7 |      33     36
grg   uuuuu |      29     -31     -72      62      1 |      10     16
igr   xxxxx |      -4       6     -97      14      0 |       5     15
irf   xxxxx |      -7       2       4      -2     -2 |       6     14
jpl   uuuuu |     -28       6      75     -70      7 |      52     53
mit   uuuuu |      -1      36     101     -54      6 |      25     28
ngs   uuuuu |     -14       9    -200     105    -11 |      20     25
sio   xxxxx |     136     -13    -373     -24     22 |      70     71

Table 7.2231.5   GPS week: 2231   Day: 5   MJD: 59866.500

                                                         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 |      -9     -11     -39      43      4 |      13     20
emr   uuuuu |       4      25    -138      23     17 |      23     29
esa   uuuuu |     -10     -16     -66      -5    -12 |      31     34
gfz   uuuuu |       2     -26     -53     -40    -11 |      32     35
grg   uuuuu |     -12     -15     -50     -51      4 |       8     16
igr   xxxxx |       8     -11       7     -10     -7 |       5     15
irf   xxxxx |       4       3       2     -35     -7 |       4     15
jpl   uuuuu |      -7      20     115      12     -1 |      50     52
mit   uuuuu |      31      31      -8    -108     -3 |      24     28
ngs   uuuuu |     -11     -38     187     174    -13 |      19     25
sio   xxxxx |     145     -40    -378    -134     13 |      71     72

Table 7.2231.6   GPS week: 2231   Day: 6   MJD: 59867.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      21     -21    -146     -43     -1 |      12     20
emr   uuuuu |     -25       0      62     143     24 |      22     29
esa   uuuuu |     -15      13     -44      71     -8 |      28     33
gfz   uuuuu |       0     -16    -106      37     -6 |      30     35
grg   uuuuu |       8     -15     -81      82      1 |       7     16
igr   xxxxx |      -9      -5       9      20    -11 |       3     18
irf   xxxxx |      -4      29     -27      10     -2 |       2     17
jpl   uuuuu |     -22      -1      63      22    -15 |      47     49
mit   uuuuu |       3      56     -45     -96      1 |      22     27
ngs   uuuuu |      22     -38     283     -93     -9 |      15     25
sio   xxxxx |     147     -19    -295     -43     12 |      72     73


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