Subject: [IGSREPORT-4182] Wk 0923 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 30 Sep 1997 6:39:03 PDT

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IGS Electronic Report    Tue Sep 30  6:39:03 PDT 1997      Message Number 4182
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0923 IGS Final Orbits

Final IGS Orbit Combination - Week 0923   (Sep 14, 1997 - Sep 20, 1997)

Contacts: J. Kouba ([email-masked])
          Y. Mireault ([email-masked]), F. Lahaye ([email-masked])

COMBINATION STRATEGY:

For a complete description of combination strategy, please refer to the report
posted on CDDIS (IGS09237.SUM).

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.

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. 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 (weights are those from the orbit combination). 
Pole rate combination uses only centres providing estimated pole rates.

  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 3 weeks (21 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:

 IGS09230-6.SP3  IGS GPS ephemeris files for days 0-6, week 0923 in SP3 format.
 IGS09237.ERP    Earth Rotation Parameters (ERP) and their rates as well as
                 Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                 with IGS ephemerides.
 IGS09237.SUM    Complete report.

REMARKS on IGS Final Orbit Combination:

1. The centres used in the clock combination are COD, EMR, ESA, GFZ and JPL. The
   other centres are excluded because they either provide broadcast clocks (NGS)
   or clock corrections are not provided (SIO).  The clock information not
   used is still compared to combination for completeness.  
   The value of 999999.999999 microseconds, according to the sp3 format 
   convention, is used to signify that no clock solution is available and 
   therefore must not be used.

2. Only the GFZ "exact" clock corrections (one epoch out of two) are included
   in the combination and RMS computation (no "interpolation" values).

3. Rapid ("IGR") orbits/clocks are included in the combination for statistics
   only.

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

5. Centre clock weights were determined using the following satellites:

         Day | PRN list | Ref. Centre 
        -----+----------+-----------------
         0-6 |    15    |    ---  (PRN list consists of non-SA satellites only)

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
                  ----+--------+---------------
                  1,4 |  NGS   |  ALL (High Rotations - see Table 2)

7. State vector resets were modeled for the following satellites to
   alleviate the effects of modeling problems, experienced by all centres,
   in the Long Arc (LA) process:

          Day (Date) |   TIME   |  PRN  | Centres  | Reason
         ------------+----------+-------+----------+-------------------
          1 (Sep 15) | 00:00:00 |  16   |   All    | Modeling problems
          2 (Sep 16) | 00:00:00 |  14   |   All    | Modeling problems (a)
          5 (Sep 19) | 00:00:00 |  29   |   All    | Modeling problems (b)

   (a) Satellite PRN14 was excluded from long arc evaluation on days 5-6 for
       all centres due to unrealistic RMS. 
   (b) Satellite PRN29 was excluded from long arc evaluation on days 4 and 6 for
       all centres due to unrealistic RMS. 

8. PRN13 was included in this week's Final combination although its status is 
   still UNHEALTHY. Users are reminded to use it with extreme caution.
   PRN13 was launched on 23 July 1997/wk915 day 3 at 03:43 UT.  It resides
   in slot F-5 (ref. NANU 088-97206).  A Follow up NANU will be sent once the
   navigation payload on PRN13 is usable.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS09237.SUM).

Table 1: Week 0923 summary.                       (Sep 14, 1997 - Sep 20, 1997)

Table 1.0923.a   GPS week: 0923   MJD: 50705.0-50711.0

         Mean and standard deviations of transformation parameters.
         WRMS - orbit RMS weighted by the SP3 header accuracy codes.
         STA  - Mean number of stations in the daily solutions.
         Units: meters, mas, ppb, nano-sec, nano-sec/day.

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .00 -.01  -.04   .05   .27  -.3  .05  .04 |   -1.7    4.2     .6
        | .00  .00  .00   .27   .07   .09   .1           |    7.5   18.0
emr  31 | .00 -.02  .00   .20  -.16  -.01  -.1  .10  .10 |  843.7   19.0     .5
        | .01  .01  .01   .18   .05   .12   .1           | 1464.6   26.7
esa  50 |-.01  .01  .01   .32  -.27   .38   .2  .09  .07 |    3.1  -43.5    1.0
        | .00  .00  .00   .28   .14   .12   .1           |   12.9   12.2
gfz  57 | .00  .00  .01  -.03   .28  -.10  -.1  .05  .05 |   -1.9    2.2     .5
        | .00  .00  .00   .11   .06   .10   .1           |    7.0   11.6
igr  n/a| .00 -.01  .00   .19   .08  -.31   .0  .07  .05 |    -.6    1.7     .7
        | .01  .01  .01   .11   .19   .22   .1           |    2.4    5.1
jpl  37 | .00  .01  .00  -.15  -.18  -.07   .2  .05  .05 |  501.3   24.2     .4
        | .00  .00  .00   .15   .04   .11   .0           |  769.8   55.9
ngs  51 | .01 -.05  .00  -.22   .05  -.76   .0  .17  .17 |   -1.4    3.3   79.8
        | .01  .01  .00   .46   .14   .27   .2           |    6.8   10.8
sio  111| .00  .00 -.02   .03   .19  -.31   .1  .08  .07 |     .0     .0     .0
        | .00  .01  .01   .09   .05   .22   .1           |     .0     .0

Table 1.0923.b   GPS week : 0923   MJD: 50705.0-50711.0

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

              Day of GPS week
 PRN  |   0   1   2   3   4   5   6 |  Remarks
------|-----------------------------|------------------------------------------
   1  |   3   3   3   4   3   4   5 |
   2  |   3   3   3   3   3   3   3 |
   3  |   2   2   2   2   3   3   3 |
   4  |   2   3   3   3   2   2   3 |
   5  |   2   3   2   2   3   3   2 |
   6  |   3   2   3   2   3   3   3 |
   7  |   3   2   2   2   2   3   2 |
   9  |   3   2   3   3   2   3   2 |
  10  |   2   3   3   2   3   3   3 |
  13  |   5   5   5   5   6   5   5 |
  14  |   3  12   3   2  15   5   4 | Modeling problems on days 1 and 4.
  15  |   2   4   3   3   4   2   3 |
  16  |   6   3   2   2   3   3   6 |
  17  |   3   2   2   2   3   3   3 |
  18  |   3   3   3   3   2   2   3 |
  19  |   2   2   3   2   2   3   3 |
  21  |   2   3   2   3   2   2   3 |
  22  |   2   2   2   3   2   3   3 |
  23  |   3   3   3   3   3   3   3 |
  24  |   2   2   2   2   2   2   2 |
  25  |   2   2   2   2   2   2   3 |
  26  |   3   2   2   2   2   3   3 |
  27  |   3   2   3   2   3   3   3 |
  29  |   2   2   3   2   0   5  18 | Modeling problems on days 4 and 6.
  30  |   2   2   2   2   3   2   2 |
  31  |   3   2   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
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
         Units: meters, mas, ppb, nano-sec, nano-sec/day.

Table 2.0923.0   GPS week: 0923   Day: 0   MJD: 50705.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .01  .00  -.46  -.02   .34  -.1  .05  .04 |   -2.0   10.2     .6
emr  32 | .00 -.01  .00   .36  -.15  -.09  -.3  .07  .07 |  -41.6     .9     .4
esa  46 | .00  .01  .00  -.31  -.28   .26   .3  .10  .06 |   -1.5  -40.4     .8
gfz  56 | .00  .00  .01   .12   .38  -.03  -.1  .05  .04 |   -2.0    9.9     .3
igr  n/a| .00 -.02  .00   .11  -.01  -.47   .0  .05  .05 |   -1.3    2.1     .4
jpl  37 | .00  .01  .00   .08  -.14   .01   .2  .04  .04 | 1583.1   95.9     .3
ngs  50 | .01 -.05 -.01   .09  -.02  -.53  -.2  .16  .17 |    1.6    2.4   81.2
sio  110| .00  .00 -.02   .17   .26  -.35   .2  .10  .09 |     .0     .0     .0

Table 2.0923.1   GPS week: 0923   Day: 1   MJD: 50706.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .00  .00  -.40   .04   .33  -.2  .05  .04 |   -5.8   19.9     .5
emr  32 | .00 -.01 -.01   .36  -.15  -.18  -.2  .10  .09 |  -48.4   15.0     .4
esa  50 |-.01  .00  .01   .42   .03   .31   .4  .09  .08 |   27.9  -43.3    1.0
gfz  57 | .01  .00  .00   .11   .24  -.29  -.1  .05  .05 |    -.5    7.8     .4
igr  n/a| .00 -.02 -.01   .40   .40  -.41   .0  .08  .06 |     .9   -1.8     .5
jpl  37 | .00  .00  .00   .04  -.23  -.22   .2  .05  .05 | 1671.8  111.1     .4
ngs  49 | .00 -.07  .00   .13  -.19 -1.16  -.2  .18  .19 |   -3.6   13.0   78.5
sio  111|-.01 -.01 -.02   .00   .15   .09   .2  .09  .07 |     .0     .0     .0

Table 2.0923.2   GPS week: 0923   Day: 2   MJD: 50707.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .01 -.01   .08  -.01   .33  -.3  .04  .04 |    1.7  -16.0     .5
emr  31 | .00 -.01  .00   .14  -.18   .08  -.1  .08  .08 |  -40.1  -14.5     .5
esa  52 | .00  .01  .01   .40  -.26   .58   .3  .08  .07 |    6.7  -69.1     .7
gfz  57 | .00  .00  .01  -.08   .19  -.02  -.1  .06  .06 |    -.9   -3.3     .5
igr  n/a| .01 -.01  .00   .18   .20  -.53   .1  .06  .05 |    2.6   -3.5    1.2
jpl  37 | .00  .00  .01  -.21  -.17  -.07   .3  .04  .04 |   71.5  -29.5     .3
ngs  53 | .00 -.05  .00  -.07   .05  -.94  -.2  .14  .14 |   -1.1   -2.9   79.5
sio  111| .00  .00 -.02  -.04   .21  -.56   .1  .06  .06 |     .0     .0     .0

Table 2.0923.3   GPS week: 0923   Day: 3   MJD: 50708.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .01  .00 -.01   .11   .10   .29  -.3  .05  .05 |   10.3  -25.3     .5
emr  31 |-.01 -.03 -.01   .09  -.14  -.10  -.1  .12  .13 | 2963.6   46.2     .7
esa  52 |-.01  .01  .01   .41  -.35   .32   .2  .05  .05 |   -5.7  -40.9     .8
gfz  58 | .00  .00  .01  -.10   .24  -.01   .0  .05  .05 |    5.5  -21.5     .4
igr  n/a| .00 -.01  .00   .24  -.16  -.45   .2  .04  .04 |     .2     .7     .5
jpl  37 | .00  .01  .00  -.28  -.13  -.13   .2  .04  .04 |   55.9  -19.0     .3
ngs  52 | .02 -.04  .00  -.23  -.03  -.39   .0  .13  .14 |    7.2  -17.7   81.4
sio  113| .00  .01 -.02  -.02   .23  -.41   .1  .06  .05 |     .0     .0     .0

Table 2.0923.4   GPS week: 0923   Day: 4   MJD: 50709.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .01  .00   .09   .15   .28  -.4  .06  .05 |  -10.5    4.8     .6
emr  30 | .00 -.02  .00  -.04  -.25   .14  -.1  .10  .10 | 3010.4   62.9     .7
esa  53 |-.01  .00  .00   .51  -.38   .28   .1  .07  .07 |    5.8  -44.2    1.2
gfz  58 | .00  .00  .00  -.17   .33  -.09  -.1  .05  .05 |  -11.8    2.4     .5
igr  n/a|-.01  .00  .00   .07   .02   .03   .1  .09  .05 |   -2.7    3.9     .9
jpl  37 | .00  .01  .00  -.25  -.21  -.17   .1  .06  .06 |   38.4    1.3     .4
ngs  50 | .00 -.04  .00 -1.22   .15  -.95  -.2  .26  .23 |  -12.9    7.6   78.5
sio  108|-.01  .00 -.01  -.07   .22  -.50   .2  .09  .07 |     .0     .0     .0

Table 2.0923.5   GPS week: 0923   Day: 5   MJD: 50710.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 |-.01  .00 -.01   .19  -.04   .09  -.3  .06  .05 |   -9.4   19.6     .7
emr  30 | .00 -.01  .01   .07  -.15   .01   .0  .09  .08 |   23.5   14.9     .6
esa  47 |-.01  .01  .01   .39  -.31   .48   .2  .12  .08 |  -12.9  -31.3    1.1
gfz  57 | .00  .00  .01   .00   .29  -.08   .0  .06  .06 |  -10.2   11.8     .6
igr  n/a|-.01 -.01  .00   .10   .19  -.04   .0  .05  .05 |   -4.5   11.6     .5
jpl  37 | .00  .01  .00  -.20  -.16   .10   .2  .04  .04 |   39.2    9.4     .5
ngs  50 | .00 -.04  .00  -.26   .13  -.75   .1  .15  .14 |   -5.6   11.4   80.3
sio  110| .00  .00 -.01  -.01   .17  -.29  -.1  .06  .06 |     .0     .0     .0

Table 2.0923.6   GPS week: 0923   Day: 6   MJD: 50711.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 |-.01  .00 -.01   .07   .10   .19  -.4  .06  .05 |    3.7   16.5     .5
emr  31 |-.01 -.03 -.01   .41  -.10   .08  -.1  .14  .11 |   38.5    7.8     .5
esa  50 |-.01  .00  .01   .41  -.32   .45   .1  .10  .08 |    1.4  -35.4    1.3
gfz  55 | .00  .00  .01  -.09   .27  -.17   .0  .05  .05 |    6.3    8.0     .5
igr  n/a| .00 -.01  .01   .19  -.07  -.34  -.2  .10  .05 |     .6   -1.3     .4
jpl  37 | .00  .00  .01  -.23  -.24  -.01   .2  .04  .04 |   49.3     .5     .4
ngs  53 | .00 -.03  .00   .02   .24  -.61   .4  .16  .15 |    4.8    9.5   78.9
sio  111| .00  .01 -.02   .15   .10  -.18  -.1  .10  .07 |     .0     .0     .0

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.
         "T" stands for Total long arc orbit RMS for all satellites.
         "NE" stands for long arc orbit RMS for Non-Eclipsing satellites only.
         "MEDI","MD" stands for median of the centre's satellite RMS.

         Units: cm.

Table 3.0923.0   GPS week: 0923   Day: 0   MJD: 50705.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   5  10  10   5   5   4  16   7    3 |    7  11  10   9  10   8  20  11    8
   2  |   6   7   5   7   5   4   9  12    3 |   10  13  14  13  14   9  14  13   11
   3  |   3   6   5   6   4   3  12  11    2 |    8   9  11   8  11   7  13   9    8
   4  |   4   8   6   4   4   3  10  11    2 |    5   9   7   5   8   5  12  13    5
   5  |   4   5   6   4   5   3  11  11    2 |    8  13  16  11  15   8  16  15   11
   6  |   3   7   5   4   5   4  23   9    3 |    8  10  15   8  15   7  21  15   10
   7  |   5   8   9   5   4   3  13   9    3 |    8  11  10   7  11   7  17  11    9
   9  |   5   7   5   4   3   4  18   7    3 |    6   8  10   5  10   4  17   9    6
  10  |   2   6   4   5   3   3  18   9    2 |    7   9  10   7  13   7  12  13    9
  13  |   7 ---   8   6   8 --- ---  16    5 |    8 ---  11   9  14 --- ---  12    8
  14  |   9   5   8   4   3   4  19  11    3 |    6   8   2   1   7  10   9  12    7
  15  |   7   6   4   4   3   4  10   8    2 |    6   6   6   6   8   5  13  10    6
  16  |   5   7  41   7   8   5  24   8    6 |    1   2   2   1   1   1   4   2    1
  17  |   4   7   5   5   8   3  20   8    3 |    8   7   9   7   9   6  20  10    7
  18  |   3   8   4   5   7   4  16  11    3 |    9  10  16   9  13   9  14  14   10
  19  |   5   6   5   4   6   3  16  11    2 |    9  10  12   7  10   6  12  11    7
  21  |   3   7   5   5   7   3  17   9    2 |    8  14  13  12  14   9  16  13   11
  22  |   3   5   5   4   3   2  13  10    2 |    9   9  12  10  13  10  19  12   10
  23  |   6   6   7   6   4   4  18   8    3 |   13  15  19  15  17  15  21  19   15
  24  |   2   8   6   3   3   4  18   9    2 |    5   7   8   6  10   4  16  11    5
  25  |   3   6   4   3   3   2  14   7    2 |    5   9   7   4   6   4  19   6    4
  26  |   6   8   4   4   4   3  20   7    3 |    8  12  11  10  14   8  18  11   10
  27  |   4  10   5   5   4   3  15   9    3 |    8   9  11   5  10   5  12  10    6
  29  |   4   7   4   3   3   4  18   8    2 |    3   7   6   5   6   3  16   7    3
  30  |   4   7   6   3   5   3  12   9    2 |   10  12  16  10  16   9  17  15   12
  31  |   8   7   9   4   3   5  18   8    3 |    8  10  10   9  11   9  16  11    9
------|--------------------------------------|--------------------------------------
 RMS  |   5   7  10   5   5   4  16  10      |T   7   9  11   8  11   7  15  11    8
 WRMS |   4   7   6   4   5   4  17   9      |NE  7   9  11   8  11   7  15  11    8
 MEDI |   4   7   5   4   4   3  16   9      |MD  8   9  11   8  11   7  16  11    8

Table 3.0923.1   GPS week: 0923   Day: 1   MJD: 50706.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   2  13   7   4   6   3  21  10    3 |    4  10   5   5   8   5  22   9    4
   2  |   6   8   6   7   5   2  12   6    3 |    7  10   7   8  10   7  13   7    7
   3  |   3   6   5   6   7   3  10   6    2 |    5   9   5   7   9   5  14   8    4
   4  |   4   7  17   5   4   3  14   7    3 |    5   8   9   5   6   4  14   6    3
   5  |   4   8   9   4   5   4  12   9    3 |    6  10  10   8   9   5  15  11    6
   6  |   4   8   9   5   8   3  19   7    2 |    6   9   5   5   9   5  20   9    5
   7  |   4   8   5   5   7   3  18   7    2 |    5  10   7   7   6   4  18  11    5
   9  |   4   8   4   6   5   4  27   7    2 |    5  10   7   5   9   4  19  10    5
  10  |   3   7  11   7   5   3  18   9    3 |    6   8   6   8  10   7  13   9    7
  13  |   6 ---   8   5   8 --- ---  14    5 |    8 ---   5   6  10 --- ---   9    5
  14  |  21  22 --- ---  21  19  31  25   12 |   11  17 --- ---  13  39  20  27   22
  15  |   4  13  18   6   8   3  20  10    4 |    6  13  10   4   9   4  22  11    5
  16  |   4  12 ---   5  16   5  19  10    3 |   12  19 ---  14  17  12  23  21   14
  17  |   4   9   7   4  11   4  16   5    2 |    5   8   6   4  10   4  17  10    5
  18  |   3   7  11   5   6   5  15   7    3 |    6   9   6   6   7   6  16  10    5
  19  |   5   8   9   5   5   3  15   4    2 |    7   9   6   6   8   6  13   8    5
  21  |   3   7  12   7   5   3  14   7    3 |    7   9   6   8  10   7  17   9    7
  22  |   3   8  11   4   4   4  11   6    2 |    6  11   6   8  10   8  11   9    7
  23  |   5  11  11   5   9   4  22   9    3 |    9  12  14   9  13  11  20  12    9
  24  |   4   7   7   4   4   2  13   5    2 |    4   6   5   5   6   3  14   6    3
  25  |   3   9   5   3   6   3  18   5    2 |    4   9   5   4   8   4  14   6    3
  26  |   3   8   5   4   5   2  23   6    2 |    6   9   5   9   7   5  18  10    7
  27  |   3   9   8   7   4   2  22   6    2 |    8   7   7   6   8   6  14   7    5
  29  |   3  10   6   4   5   2  18   7    2 |    3  10   6   4   7   3  16   7    2
  30  |   2   6   8   4   5   2  14   7    2 |    5   7   8   6   7   5  16   8    4
  31  |   3   9   5   4   6   3  18   7    2 |    5  10   4   6   7   4  15  12    5
------|--------------------------------------|--------------------------------------
 RMS  |   5  10   9   5   8   5  18   9      |T   6  10   7   6   9   9  16  11    7
 WRMS |   4   9   8   5   6   5  19   7      |NE  6  10   7   6   9   9  16  11    7
 MEDI |   4   8   8   5   6   3  18   7      |MD  6   9   6   6   9   5  16   9    5

Table 3.0923.2   GPS week: 0923   Day: 2   MJD: 50707.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4  12   6   6   5   4  17   7    3 |    6  12   7   7   8   6  21   9    6
   2  |   5   6   7   8   5   5   8   7    3 |    8  10  13  10  11   8  11  11    9
   3  |   4   7   4   6   6   4  13   6    2 |    6   8   8   8   9   6  13   9    6
   4  |   5   8  10   6   5   5  16   5    3 |    5  10   8   7   7   6  13  10    6
   5  |   3   9   8   3   3   5  11   7    2 |    6  10  11   7  10   5  11  13    8
   6  |   3   9   9   6   5   4  13   5    3 |    5  10  10   8  10   6  15   8    6
   7  |   5   7   5   5   7   3  16   5    2 |    6   9   9   6   9   6  17   9    7
   9  |   5   9   6   6   5   4  17   4    3 |    4   9   8   5   8   4  13  10    6
  10  |   4   8  11  11   4   5   9   6    3 |    5  10  10   6   9   6   9  11    7
  13  |   6 ---   6  10  12 --- ---  12    5 |    8 ---   9   9  17 --- ---  16    9
  14  |   4   8 ---   5  10   5  10   7    3 |   10   5 ---   3  13  13  16  12   12
  15  |   6   7  15   5   5   6  10   5    3 |    6   6   9   5   8   4  12  10    5
  16  |   4   5  11   3  13   5  11   4    2 |    5   6  10   6  14   7  11   9    6
  17  |   5   7   5   3   7   3  10   5    2 |    8   9  11   7  11   6  15  11    8
  18  |   2   7   9   5   6   7  17   7    3 |    7  10   8   6  11   7  15  12    7
  19  |   7   6   7   3   5   6  16   4    3 |    7   9   8   7   8  10  12   9    6
  21  |   4   5   5   6   4   3  11   8    2 |    6  10  11   7  10   5  14  12    8
  22  |   3   8   9   6   3   2  14   6    2 |    7  11  11   7  10   7  12  10    8
  23  |   6   8   6   6   8   5  17   7    3 |   10  14  15  12  12  12  19  18   12
  24  |   3   6   5   6   5   3  14   5    2 |    4   8   7   6   8   4  15   9    6
  25  |   4   7   4   3   5   4  15   6    2 |    6   9   7   5   8   5  19  10    5
  26  |   5   6   8   4   6   3  13   7    2 |    7  10  10   8  10   8  13  13    9
  27  |   3   8  11   5   2   3  17   5    3 |    8  10   9   6   8   6  12   7    6
  29  |   4   6   6   4   6   5  20   5    3 |    2   6   5   6   6   4  19   6    3
  30  |   2   7   6   3   4   3   9   5    2 |    6  10  12   7  11   6  13  10    8
  31  |   3  10   7   4   6   3  17  10    3 |    6  10   7   8   8   6  14  14    7
------|--------------------------------------|--------------------------------------
 RMS  |   4   8   8   6   6   4  14   6      |T   6   9   9   7  10   6  14  10    7
 WRMS |   4   8   7   6   5   4  14   6      |NE  6   9   9   7  10   6  14  10    7
 MEDI |   4   7   7   5   5   4  14   6      |MD  6  10   9   7  10   6  13  10    7

Table 3.0923.3   GPS week: 0923   Day: 3   MJD: 50708.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4  33   4   6   4   4  16   6    4 |   10  34  11   9  10  10  22  12    9
   2  |   5  12   5   7   3   4  12   6    3 |   12  15  14  12  13  12  14  14   12
   3  |   4   7   4   6   3   3  15   4    2 |    9  13   9  10  10   7  18   9    9
   4  |   4  18   6   4   3   3  18   6    3 |    6  13   8   5   7   4  13   8    4
   5  |   4   9   5   4   3   4  13   9    2 |   10  13  13  12  13  10  15  10   11
   6  |   3   8   4   3   4   4  11   5    2 |   10  15  11   9  11   8  18  14   10
   7  |   5  12   3   4   4   3  12   6    2 |    9  14  10   9  10   9  14  14    9
   9  |   4  17   5   4   3   4  14   7    3 |    7  18   7   7   6   7  12   7    6
  10  |   3  10   7   5   4   5  13   5    2 |   10  15  12  10  11  10  12  12   10
  13  |   7 ---   6   7  10 --- ---  14    5 |    9 ---  10  10  14 --- ---  13    9
  14  |   6   6   5   4   4   3   8   5    2 |   14   9   3   5  13  14  16  12   13
  15  |   7   9   7   5   4   5  11   6    3 |    9   9  11   7   9   7  13  10    6
  16  |   3   6   4   4   4   5   6   6    2 |   10  12   9  11  13  10  14  14   11
  17  |   5  12   4   3   3   3  14   6    2 |   10   7  10   8   9   9  20  12    9
  18  |   3   6   8   5   4   8  10   6    3 |   10  15  13  10  11   9  15  14   11
  19  |   8   9   4   4   5   3  14   5    2 |    9   7   5   7   7   8  11   6    5
  21  |   3  14   4   8   6   4  10   6    3 |   12  14  13  11  13  10  13  12   11
  22  |   5   7   9   6   4   5  14   4    3 |   11  12  13  13  13  11  17  15   12
  23  |   5  11   8   5   5   5  18   6    3 |   13  18  18  15  16  15  16  18   15
  24  |   4  11   5   3   5   2  10   6    2 |    6   8   6   6   7   5  13   8    5
  25  |   4  14   6   3   4   2  14   4    2 |    6  12   9   5   9   6  19   9    6
  26  |   4   7   6   4   5   4  13   5    2 |   10  14  11  12  12   9  16  12   10
  27  |   4   9   5   6   3   4  14   5    2 |    7  10   6   6   6   6  14   8    5
  29  |   4   7   4   4   3   3  21   5    2 |    3   8   5   5   5   3  17   7    4
  30  |   3  12   5   4   4   4   9   3    2 |   11  18  14  11  14  10  14  13   11
  31  |   3  12   5   3   5   3  15   6    2 |    9  15  10  10  12   8  17  11   10
------|--------------------------------------|--------------------------------------
 RMS  |   5  12   5   5   4   4  13   6      |T   9  14  10   9  10   9  15  11    9
 WRMS |   5  13   5   5   4   4  14   5      |NE  9  14  10   9  10   9  15  11    9
 MEDI |   4  10   5   4   4   4  13   6      |MD 10  13  10  10  11   9  15  12   10

Table 3.0923.4   GPS week: 0923   Day: 4   MJD: 50709.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4  15  10   4   6   6  39   7    3 |    9  16  11   9   7   9  26  11    8
   2  |   5   8   5   7   4   4  26   7    3 |    8  13   9   9   9   9  13  10    9
   3  |   4   8   6   7   4   6  21  12    3 |    9  10   8   8   9   9  21  17    8
   4  |   4   9   8   4   6   4  26   7    2 |    5   9   5   6   7   4  16   7    4
   5  |   4  13   8   5   3   3  14   4    3 |    9  14  11  10   9   8  15  11    9
   6  |   4  12   6   4   6   4  14   8    3 |    8  12   9   8  10   8  21  13    9
   7  |   5   9   6   4   5   3  29   8    2 |    8  10   9   9   7   7  17  12    8
   9  |   4  10   6   6   6   3  32   5    2 |    7  13   5   8   9   7  23   8    7
  10  |   3   9   9   5   5   4  13   7    3 |    9   8  10   7   8   7  13   9    8
  13  |   8 ---   8   9  13 --- ---  14    6 |    8 ---  10  10  19 --- ---  15    9
  14  |  20 --- --- ---  36  23  70  23   15 |   54 --- --- ---  46  60  43  55   54
  15  |   8  11   9   4   8   8  17  13    4 |    8  10   6   6   9   6  16  14    5
  16  |   4  13   8   4   4   4  19  12    3 |   12  16   8  12   9   9  23  19   11
  17  |   4  12   5   7   4   3  12   7    3 |    7   7   6   7   7   7  13  10    7
  18  |   4   9   4   4   5   5  24   7    2 |    9  10  10   8  10   9  26  13    8
  19  |   7   7   4   4   3   5  16   4    2 |    7   9   4   7   7   7  18   7    6
  21  |   3   8   6   5   5   4  18   6    2 |    9  11  11   8   9   8  20  10    8
  22  |   4   8   6   5   5   3  16   8    2 |    9  11  12   9  10   8  17  13    9
  23  |   6  11  10   4   6   5  27   8    3 |   11  15  15  12  14  13  19  13   11
  24  |   3   9   5   4   8   3  21   6    2 |    4   9   5   5   9   3  19   7    4
  25  |   3   9   4   4   5   4  25   8    2 |    5   8   5   7   8   6  22   9    5
  26  |   4   9   4   5   4   3  20   6    2 |   10  10   8  10  11   9  22  10    9
  27  |   5   9   8   8   6   3  14   5    3 |    8  11   7   8   8   9  11   5    7
  29  | --- ---   4 --- --- --- --- ---    0 |  --- ---   0 --- --- --- --- ---  ---
  30  |   4  13   8   4   4   3  16   6    3 |   10  11  13   9  10   9  18  13   10
  31  |   5  10   9   4   6   2  19   6    3 |    9  14   9  10  10   9  22  15    9
------|--------------------------------------|--------------------------------------
 RMS  |   6  10   7   5   9   6  26   9      |T  13  11   9   8  13  14  20  15   13
 WRMS |   5  10   7   5   5   6  23   7      |NE 13  11   8   8  13  14  20  15   13
 MEDI |   4   9   6   4   5   4  20   7      |MD  9  11   9   8   9   8  19  11    8

Table 3.0923.5   GPS week: 0923   Day: 5   MJD: 50710.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4  12   5   6   5   4  30   7    4 |    7  15   8   7   9   7  24   9    7
   2  |   6  10   8   6   4   4   8   7    3 |    8  10  10  10  10   7  13   8    8
   3  |   4   5   6   8   4   5  12   6    3 |    6   9   6   5   8   6  17   8    5
   4  |   4   8  10   3   6   3  12   5    2 |    5   9  10   6   7   4  15   6    6
   5  |   3  10   9   5   4   4   7   6    3 |    7  15   8   8   8   6  11   6    7
   6  |   4  13   9   5   5   3  12   6    3 |    6  12   6   6   7   6  18  10    7
   7  |   8   9   8   4   5   3  17   7    3 |    6   8  10   6   8   6  17   9    5
   9  |   7  10   5   4   5   4  22   5    3 |    8  12   8   7   8   8  18  10    9
  10  |   3  11  10  10   3   3  12   6    3 |    8  10   8   7   9   7  15   8    7
  13  |   9 ---   6   7   9 --- ---  13    5 |    7 ---   8   7  13 --- ---  14    7
  14  |   9   8  38   5   3   4  16   4    5 |    0   0   0   0   0   0   0   0  ---
  15  |   4   6  11   3   5   5  13   6    2 |    6   9   7   6  10   6  17   7    6
  16  |  11   6   8   5   3   5  11   4    3 |    6  10  11  12  10   9  13   9    7
  17  |   5   8   4   7   6   6   9   8    3 |    7   8   8   7   7   9  16  12    9
  18  |   3   8   7   5   4   6  11   5    2 |    6  12   7   7   8   6  14  10    7
  19  |   6   7   5   4   4   5  17   7    3 |    9  10   7   8   8   7  19   7    8
  21  |   3   6   8   6   3   4  11   7    2 |    8  11  10   9   9   8  11   8    8
  22  |   8   7   9   6   3   5  14   6    3 |    7   9   8   6   8   6  15  10    6
  23  |   5   9   9   6   6   7  14   6    3 |    9  14  13   9  12  11  19  11   10
  24  |   3   9   5   5   5   3  12   7    2 |    5   9   7   6   8   4  14   6    5
  25  |   3   7   3   3   5   4  15   6    2 |    6  12   9   8  10   5  21  11    9
  26  |   7   7   6   5   5   3  15   4    3 |    7   9   8   7   8   6  16   8    7
  27  |   5  10   9   6   5   4  13   8    3 |    9  12   8   7   7   7  14   9    7
  29  |   4   7  27   5   9 ---  18   6    5 |   21  22  21  22  21 ---  22  23   22
  30  |   3   7   7   3   3   3   9   5    2 |    6  10   9   6   7   6  11   6    6
  31  |   5   7   8   4   5   4  17   6    3 |    7  10   7   7   9   6  18   8    7
------|--------------------------------------|--------------------------------------
 RMS  |   6   9  12   6   5   4  15   6      |T   8  11   9   8   9   6  16   9    8
 WRMS |   5   8   8   6   5   4  14   6      |NE  7  11   9   8   9   6  16   9    8
 MEDI |   5   8   8   5   5   4  13   6      |MD  7  10   8   7   8   6  16   9    7

Table 3.0923.6   GPS week: 0923   Day: 6   MJD: 50711.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4  15   5   4   8   3  41  13    5 |   11  17   9  10   9  10  30  16    9
   2  |   7   9   7   7   4   4   9   7    3 |   11  12  12  12  12  10  14  13   11
   3  |   7  12   4   5   5   5  11   7    3 |    9  11  11  10  12   9  15  15    9
   4  |   5   9   5   4   4   3  16   7    3 |    7   8   5   4   5   3  17   9    4
   5  |   2   7   8   3   3   4  11   5    2 |   10  11  10   9  10   9  15  11    9
   6  |   3  12   8   5   5   4  15   9    3 |   10  12  12  10  11   9  15  17   10
   7  |   7   8   7   4   4   3  13   5    2 |    9  11  10   9   9   9  16  13    9
   9  |   5  11   6   3   3   3  10   7    2 |    8   9   8   9   9   7  22  13    9
  10  |   2   9   7   6   4   3  11  10    3 |   10  17  11   8  11   9  15  10    9
  13  |   6 ---   8   5   9 --- ---  17    5 |    9 ---   6   8  11 --- ---  15    7
  14  |   8  21  20   4   9   5   6  13    4 |    0   0   0   0   0   0   0   0  ---
  15  |   5  15  15   3   7   4   9   9    3 |    8  11   8   6   6   5  15   9    6
  16  |  12  13  20  15   6  10  20   9    6 |   19  29  14  36  24  23  45  31   25
  17  |   4  13   4   5   7   3  18  10    3 |   10   9   7   9  12   9  23  16    9
  18  |   4  12  13   5   4   6  11  10    3 |   11  12  10  10  10   9  19  19   10
  19  |   7  13   7   5   6   4  18   8    3 |    7  11   5   9  11   8  19   8    6
  21  |   4   9  10   4   3   3  13   9    3 |   10  11  10  10  10  11  17  10   10
  22  |   6  10   6   4   5   4  12  11    3 |   10  10  11  11  11   9  18  16   10
  23  |   5  10  13   5   3   5  15   8    3 |   13  15  17  13  13  16  18  16   14
  24  |   3   7   4   3   3   3  15   6    2 |    4   7   4   4   4   3  15   8    3
  25  |   6   9   6   4   9   4  19  12    3 |    5   9   7   7  12   6  25  15    7
  26  |   6   7   6   4   4   3  16   8    3 |   10  11  11  10  10   9  19  11   10
  27  |   4  11  13   6   4   3  10   6    3 |    7  11   5   6   6   7  15   8    5
  29  |  16  43 --- ---  40 --- ---  24   18 |    0   0 --- ---   0 --- ---   0  ---
  30  |   3   9   6   3   3   3  11   6    2 |   10  11  12   9  11  10  14  14   10
  31  |   8  12   8   5   7   3  12   8    3 |   11  16  12  12  13  10  21  16   11
------|--------------------------------------|--------------------------------------
 RMS  |   6  14  10   5  10   4  16  10      |T   9  12   9  11  11   9  20  14   10
 WRMS |   5  11   8   5   5   4  15   7      |NE  9  12   9  11  10   9  19  13   10
 MEDI |   5  11   7   4   5   4  13   9      |MD 10  11  10   9  11   9  17  14    9

Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the initial 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.
	 U    - Station Used in centre's solution (at least one day).
         Units: centimetres.

Table 4.0923   GPS week: 0923   MJD: 50705.0-50711.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2481 |U  44   32   94 |U  36   31   94 |   31   18   62 |
emr | emr 2315 |   43   32   98 |   37   31   97 |U  33   20   63 |
esa | esa 2213 |   47   36   95 |U  42   36  114 |   35   25   65 |
gfz | gfz 1220 |   44   36   98 |U  45   30   94 |   30   23   58 |
igr | igr 2458 |   42   33   96 |   40   33   98 |   32   19   64 |
igs | igs 2490 |   45   34   94 |   37   32   98 |   31   17   63 |
jpl | jpl 2222 |   41   31   96 |U  36   30   96 |   33   17   69 |

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 initial coordinates 
         for the Latitude, Longitude and Height components.
         
         CLK  - Satellite clocks used.
         EPO  - Number of satellite clock epochs available for that day.
         Units: centimetres.

Table 5.0923.0   GPS week: 0923   Day: 0   MJD: 50705.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2493 |   50   31  103 |   27   28   75 |   31   21   53 |
emr | emr 2400 |   49   31  105 |   28   28   79 |   31   22   53 |
esa | esa 2087 |   50   36  102 |   37   28   92 |   36   25   61 |
gfz | gfz 1247 |   50   28  108 |   32   32   80 |   41   28   56 |
igr | igr 2394 |   48   33  106 |   27   28   81 |   32   23   56 |
igs | igs 2496 |   48   32  102 |   28   27   81 |   31   21   53 |
jpl | jpl 2399 |   48   30  104 |   30   27   79 |   31   20   54 |

Table 5.0923.1   GPS week: 0923   Day: 1   MJD: 50706.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2493 |   44   28   89 |   33   27   84 |   32   17   49 |
emr | emr 2203 |   44   28   95 |   31   27   81 |   45   27   57 |
esa | esa 2188 |   43   31   92 |   38   35   97 |   44   27   56 |
gfz | gfz 1198 |   44   27   91 |   43   28   89 |   40   26   59 |
igr | igr 2469 |   42   26   91 |   36   31   87 |   37   16   57 |
igs | igs 2494 |   42   28   90 |   34   28   82 |   32   16   50 |
jpl | jpl 2397 |   42   26   90 |   33   27   80 |   33   16   52 |

Table 5.0923.2   GPS week: 0923   Day: 2   MJD: 50707.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   43   27   91 |   37   28   92 |   31   16   45 |
emr | emr 2398 |   43   27   93 |   27   24   85 |   28   17   42 |
esa | esa 2218 |   40   25   87 |   43   37  107 |   27   19   45 |
gfz | gfz 1247 |   43   28   86 |   55   30   99 |   31   18   45 |
igr | igr 2459 |   41   27   97 |   53   32  101 |   31   19   45 |
igs | igs 2496 |   41   26   90 |   38   28   93 |   28   15   42 |
jpl | jpl 2398 |   42   25   93 |   26   22   86 |   28   16   43 |

Table 5.0923.3   GPS week: 0923   Day: 3   MJD: 50708.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   47   35  100 |   26   26   69 |   45   19   96 |
emr | emr 2395 |   46   33   99 |   24   25   72 |   44   19   95 |
esa | esa 2358 |   47   38   96 |   35   28   88 |   47   23  106 |
gfz | gfz 1247 |   55   40  104 |   38   30   73 |   22   21   48 |
igr | igr 2495 |   45   35   99 |   34   27   72 |   44   18   97 |
igs | igs 2496 |   46   34   97 |   30   26   69 |   45   18   98 |
jpl | jpl 1449 |   41   31   97 |   23   21   73 |   54   16  122 |

Table 5.0923.4   GPS week: 0923   Day: 4   MJD: 50709.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   39   33   98 |   40   26   85 |   20   15   40 |
emr | emr 2208 |   38   35  102 |   47   30   85 |   20   14   44 |
esa | esa 2195 |   63   47  108 |   48   31  139 |   28   35   45 |
gfz | gfz 1152 |   37   40  104 |   50   25   65 |   21   22   55 |
igr | igr 2400 |   40   36  102 |   41   27   96 |   20   17   43 |
igs | igs 2454 |   57   46  103 |   40   30  107 |   22   18   50 |
jpl | jpl 2303 |   38   33  100 |   43   31   85 |   22   13   43 |

Table 5.0923.5   GPS week: 0923   Day: 5   MJD: 50710.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   32   28   92 |   39   41   96 |   26   20   56 |
emr | emr 2396 |   31   30   93 |   41   41   95 |   25   19   56 |
esa | esa 2246 |   30   28   89 |   48   42  113 |   30   20   59 |
gfz | gfz 1248 |   36   34   93 |   40   26   76 |   28   20   60 |
igr | igr 2494 |   31   31   92 |   42   42   98 |   27   19   59 |
igs | igs 2496 |   30   28   90 |   41   40   98 |   26   17   56 |
jpl | jpl 2304 |   31   31   93 |   42   41   97 |   27   19   61 |

Table 5.0923.6   GPS week: 0923   Day: 6   MJD: 50711.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2491 |   48   39   87 |   43   39  138 |   24   17   72 |
emr | emr 2207 |   46   41   97 |   50   40  158 |   26   18   78 |
esa | esa 2199 |   46   41   90 |   46   44  146 |   23   19   65 |
gfz | gfz 1198 |   39   46   99 |   52   39  150 |   22   21   78 |
igr | igr 2496 |   45   41   87 |   45   42  138 |   24   17   72 |
igs | igs 2496 |   46   39   87 |   44   41  139 |   24   16   71 |
jpl | jpl 2303 |   45   38   91 |   47   38  148 |   24   15   71 |

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 (10**-5")                           
         Ypole,Yrt: y pole and y pole rate (10**-5"/day)                       
         LOD: Length Of Day (us)                                               
                                                                               
         AC LOD BIAS: 21-day mean LOD bias with respect to Bulletin A (us)     
         AC LOD BIAS SIGMA: Sigma of AC LOD BIAS (us)                          
                                                                               
         FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
               for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 6.0923   GPS week: 0923   MJD: 50705.5-50711.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS SIGMA
------------------------------------------------------------------------
cod   uuuuu |     -7      7      2      2    -14 |     -17     44
            |      7     26      8     11     19 |       4
emr   uuuuu |     23    -20     39     26    -11 |      13     37
            |     17     19     72    111     27 |       4
esa   uuuuu |     30    -39     19    -17      8 |      15     31
            |     12     27     21     28     15 |       1
gfz   uuuuu |    -28      4      1      6     18 |       8     24
            |      6     11     11     18      3 |       1
igr   xxxxx |    -12    -20      9     11     -8 |      10     21
            |     18     14     23      8     17 |       2
jpl   uuuuu |     23     18    -24      5    -21 |     -35     31
            |      6     13     11     10     16 |       6
ngs   uuuuu |    -17     27     58     12     14 |      16     58
            |     13     48    101    106     40 |       5
sio   uuuuu |    -31    -10     -1     -7     27 |      21     33
            |     10     18     13     30     42 |       5
                                                                               
Table 7: Earth Orientation Parameters daily summary.                           
                                                                               
         Daily Centre ERP, ERP Rates and LOD differences with respect to       
         IGS combined values.                                                  
                                                                               
         Xpole,Xrt: x pole and x pole rate (10**-5")                           
         Ypole,Yrt: y pole and y pole rate (10**-5"/day)                       
         LOD: Length Of Day (us)                                               
                                                                               
         AC LOD BIAS: 21-day mean LOD bias with respect to Bulletin A (us)     
         AC LOD BIAS SIGMA: Sigma of AC LOD BIAS (us)                          
                                                                               
         FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
               for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 7.0923.0   GPS week: 0923   Day: 0   MJD: 50705.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS SIGMA
------------------------------------------------------------------------
cod   uuuuu |      1     48     -9      4     -4 |     -11     45
emr   uuuuu |      6    -37     21    -49     -6 |      17     34
esa   uuuuu |     28     17     16      1     24 |      16     31
gfz   uuuuu |    -35    -12     13     21     20 |       8     24
igr   xxxxx |     -6     -9     20      6    -13 |      13     22
jpl   uuuuu |     22     -3    -36      8    -17 |     -28     30
ngs   uuuuu |     -3    -11     55      7    -11 |      16     62
sio   uuuuu |    -23    -23     11    -13    -11 |      29     39

Table 7.0923.1   GPS week: 0923   Day: 1   MJD: 50706.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS SIGMA
------------------------------------------------------------------------
cod   uuuuu |     -6     41      5     -5      5 |     -13     42
emr   uuuuu |     25    -37    100    -15     -2 |      18     35
esa   uuuuu |      5    -44     -9     12    -13 |      16     32
gfz   uuuuu |    -31     -9     -3     -4     16 |       9     25
igr   xxxxx |    -43    -49     43     -1      0 |      13     22
jpl   uuuuu |     28      3    -32      2    -11 |     -30     28
ngs   xxxxx |    -12    -17     78    -53    -31 |      13     60
sio   uuuuu |    -26    -18      5     15      2 |      26     34

Table 7.0923.2   GPS week: 0923   Day: 2   MJD: 50707.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS SIGMA
------------------------------------------------------------------------
cod   uuuuu |     -4     -5     -9     -3     -5 |     -13     42
emr   uuuuu |     21    -10     12     18     -7 |      17     34
esa   uuuuu |     27    -45     38    -15     19 |      15     32
gfz   uuuuu |    -21      2     14     30     19 |       9     25
igr   xxxxx |    -26    -12     11     13     14 |      12     22
jpl   uuuuu |     16     23    -36    -16      3 |     -32     27
ngs   uuuuu |    -23     17     41    -63      7 |      12     60
sio   uuuuu |    -20      6     -2      4    -26 |      24     32

Table 7.0923.3   GPS week: 0923   Day: 3   MJD: 50708.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS SIGMA
------------------------------------------------------------------------
cod   uuuuu |    -13    -10      0      7    -36 |     -17     42
emr   uuuuu |     -2    -14    -29     14     -9 |      13     34
esa   uuuuu |     36    -43     18    -14     10 |      13     32
gfz   uuuuu |    -22      7    -11      3     23 |       6     23
igr   xxxxx |      4    -23     16     25      6 |       9     19
jpl   uuuuu |     19     32    -15     11    -25 |     -34     28
ngs   uuuuu |     -3     24    139    -35     83 |      10     60
sio   uuuuu |    -25      2    -12     -9     19 |      18     32

Table 7.0923.4   GPS week: 0923   Day: 4   MJD: 50709.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS SIGMA
------------------------------------------------------------------------
cod   uuuuu |    -15     -6     11      9      6 |     -18     43
emr   uuuuu |     38      0     87      7    -68 |      13     34
esa   uuuuu |     41    -68     -8    -67     21 |      15     29
gfz   uuuuu |    -23     16      1     16     16 |       9     22
igr   xxxxx |     -2    -13     -4      4     -3 |       9     19
jpl   uuuuu |     18     25    -24      2    -48 |     -37     28
ngs   xxxxx |    -27    123    209    244     52 |      15     63
sio   uuuuu |    -39     13    -21     24     77 |      17     31

Table 7.0923.5   GPS week: 0923   Day: 5   MJD: 50710.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS SIGMA
------------------------------------------------------------------------
cod   uuuuu |      2    -18     11     16    -38 |     -22     44
emr   uuuuu |     31      2    -57    -61      2 |       8     44
esa   uuuuu |     40    -52     36      6      5 |      14     30
gfz   uuuuu |    -28      9      6      2     18 |       7     24
igr   xxxxx |    -20     -9      6     13    -28 |       8     22
jpl   uuuuu |     27     16     -7     17    -25 |     -43     37
ngs   uuuuu |    -37     52     -6    -12      7 |      22     51
sio   uuuuu |    -39     -8     14     -3     50 |      17     31

Table 7.0923.6   GPS week: 0923   Day: 6   MJD: 50711.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS SIGMA
------------------------------------------------------------------------
cod   uuuuu |    -10     -2      6    -18    -24 |     -22     44
emr   uuuuu |     46    -44    142    269     16 |       8     44
esa   uuuuu |     35    -41     39    -41    -12 |      14     30
gfz   uuuuu |    -37     12    -15    -25     15 |       7     24
igr   xxxxx |      7    -25    -32     14    -32 |       8     22
jpl   uuuuu |     31     28    -16      7    -20 |     -43     37
ngs   uuuuu |    -11      0   -108     -4     -8 |      22     51
sio   uuuuu |    -45    -39      1    -68     77 |      17     31

[Mailed From: Yves Mireault <[email-masked]>]