Subject: [IGSREPORT-4355] Wk 0931 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 25 Nov 1997 7:38:35 PST

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IGS Electronic Report    Tue Nov 25  7:38:35 PST 1997      Message Number 4355
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0931 IGS Final Orbits

Final IGS Orbit Combination - Week 0931   (Nov 09, 1997 - Nov 15, 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 (IGS09317.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:

 IGS09310-6.SP3  IGS GPS ephemeris files for days 0-6, week 0931 in SP3 format.
 IGS09317.ERP    Earth Rotation Parameters (ERP) and their rates as well as
                 Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                 with IGS ephemerides.
 IGS09317.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  |    All   |    EMR  (see note below)
         1-6 |    15    |    ---  (PRN list consists of non-SA satellites only)

     Note: A different strategy for clock alignment was chosen since the
           alignment using non-SA satellites gave inappropriate weights 
           and unrealistic clock RMS.
           A chosen reference centre is aligned to the broadcast GPS clocks
           using all satellites; all other centres are then aligned to that
           reference centre. The clock weights are computed from the absolute
           deviation of centre's aligned clock corrections with respect to the
           unweighted mean.

6. The following clock solutions were excluded from the combination because
   they were biasing the combined clock solutions (large clock shifts/outliers)
   but were kept for the RMS computation. Note that starting with week 860, 
   Centres with clock RMS higher than 2 ns are excluded from the clock 
   combination if they bias the combined clock solution. This will make IGS 
   clock precision more comparable to the best ACs.

                  Day | Centre | PRN list
                  ----+--------+---------------
                   0  |  ESA   |  ALL
                   4  |  ESA   |  ALL
                   6  |  ESA   |  ALL

7. New clock offsets and drifts were estimated for centres showing reference
   clock resets.  Note that only the first clock offset and drift are output
   to the summary file.  However, the clock combination and the listed RMS
   include all the clock segments.  In summary, the following clock
   shifts/resets were noticed and accounted for:

                  Day | Centre |  Time  |  Jump
                  ----+--------+--------+-------------
                   0  |  ESA   | ~00:15 | ~ -12.4 ns

8. 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
         ------------+----------+-------+----------+-------------------
          2 (Nov 11) | 00:00:00 |  13   |   All    | Modeling problems
          3 (Nov 12) | 00:00:00 |  19   |   All    | Modeling problems
          3 (Nov 12) | 00:00:00 |  23   |   All    | Modeling problems (a)
          6 (Nov 15) | 00:00:00 | 14,16 |   All    | Modeling problems

   (a) Satellite PRN23 was excluded from long arc evaluation on days 3 and 6 for
       all centres due to unrealistic RMS.

9. 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.

10.A new satellite, PRN08, was launched on Nov 06, 1997 (wk 0930 day 4) at
   00:30 UTC (ref. USNO GPS Automated Data Service (ADS)). It will reside in the
   A5 slot. A follow up NANU will be sent once the navigation payload on PRN08
   is usable.

11.Starting with GPS wk 929, a new weighting scheme for the IGS LOD combination
   was adopted. AC LOD BIAS RMS (1/RMS^2) are now used for AC LOD weights 
   instead of the AC orbit weights used up to now. Tests over 150 days showed 
   improvements in the IGS LOD and IGS integrated UT1 values when compared to
   Bulletin A.

   Note: Since GPS wk 929, AC LOD BIAS RMS are now printed in Tables 6-7 instead
         of AC LOD BIAS SIGMA.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS09317.SUM).

Table 1: Week 0931 summary.                       (Nov 09, 1997 - Nov 15, 1997)

Table 1.0931.a   GPS week: 0931   MJD: 50761.0-50767.0

         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  84 | .00  .01  .00  -.29   .10   .07  -.3  .05  .04 |    3.8   -4.4     .5
        | .00  .01  .00   .09   .04   .13   .0           |    7.6    8.6
emr  29 | .00 -.02 -.01   .26  -.12   .53   .0  .11  .11 |  430.4   43.5     .5
        | .01  .00  .01   .16   .09   .14   .2           |  516.3   58.0
esa  52 | .00  .01  .01   .01  -.19   .46   .3  .10  .08 |   38.7  -22.2    2.2
        | .01  .00  .01   .21   .12   .10   .1           |  117.0   13.9
gfz  56 | .00 -.01  .00   .15  -.02  -.36  -.1  .05  .05 |    2.7   -2.8     .4
        | .00  .00  .00   .10   .06   .04   .1           |    7.5    6.6
igr  n/a| .00 -.01  .00   .22   .03   .16   .0  .08  .05 |     .0    2.0     .5
        | .01  .00  .00   .13   .13   .27   .1           |     .6    6.0
jpl  37 | .00  .01 -.01  -.09  -.11  -.01   .4  .05  .05 | 1015.0  105.4     .4
        | .00  .00  .00   .15   .05   .10   .1           |  231.2    3.2
ngs  52 |-.01 -.05  .00   .56   .18   .29  -.3  .17  .17 |    1.0   -2.7   80.0
        | .01  .01  .02   .20   .21   .25   .3           |    4.9    3.6
sio  109| .00  .00  .00  -.07   .12  -.15   .0  .07  .06 |     .0     .0     .0
        | .00  .00  .00   .08   .06   .11   .1           |     .0     .0

Table 1.0931.b   GPS week : 0931   MJD: 50761.0-50767.0

         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  |   2   2   2   2   2   2   3 |
   2  |   3   2   3   2   3   3   3 |
   3  |   2   2   2   2   2   3   3 |
   4  |   3   3   3   3   3   4   3 |
   5  |   3   2   3   2   3   3   3 |
   6  |   2   3   2   2   3   3   3 |
   7  |   2   2   2   2   3   3   2 |
   9  |   2   2   3   2   2   3   3 |
  10  |   3   3   2   3   2   3   3 |
  13  |   6   6   8   6   7   5   6 |
  14  |   2   2   3   2   2   3  16 | Modeling problems on day 6.
  15  |   3   3   4   3   3   4   4 |
  16  |   2   2   3   2   3   7   4 |
  17  |   3   4   3   3   3   3   3 |
  18  |   2   3   3   2   2   2   3 |
  19  |   2   2   3   6   2   2   3 |
  21  |   2   2   2   2   2   2   3 |
  22  |   2   3   3   2   3   3   3 |
  23  |   3   3   4   5   4   5   5 |
  24  |   3   3   3   3   3   4   4 |
  25  |   2   2   3   3   3   3   2 |
  26  |   2   2   2   3   3   3   3 |
  27  |   2   3   3   2   3   2   3 |
  29  |   2   2   2   2   2   2   2 |
  30  |   3   2   3   2   3   3   3 |
  31  |   2   2   2   3   2   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 2.0931.0   GPS week: 0931   Day: 0   MJD: 50761.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  85 | .00  .00  .01  -.44   .14   .22  -.4  .04  .04 |   -4.6    8.9     .3
emr  28 | .00 -.02 -.01   .18  -.14   .42   .1  .11  .11 |  691.9  110.0     .4
esa  55 | .00  .01  .00   .19  -.15   .34   .2  .08  .07 |  301.6    2.5    2.8
gfz  59 | .00 -.01  .01   .07  -.03  -.39  -.1  .04  .04 |   -5.5    8.1     .2
igr  n/a| .00 -.01 -.01   .14  -.11   .02   .0  .05  .05 |   -1.1   15.6     .2
jpl  37 | .00  .01  .00   .06  -.09   .00   .4  .04  .04 |  693.0  110.7     .2
ngs  52 | .01 -.06 -.01   .74   .17   .49  -.2  .13  .13 |   -3.0    2.6   81.5
sio  109| .00  .01  .00  -.11   .04  -.16   .0  .06  .05 |     .0     .0     .0

Table 2.0931.1   GPS week: 0931   Day: 1   MJD: 50762.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  83 | .00  .01  .01  -.34   .08   .07  -.3  .04  .04 |   -8.4    1.3     .6
emr  28 |-.01 -.02  .00   .03  -.13   .29  -.2  .12  .12 |  795.3  103.0     .6
esa  53 | .00  .01  .01   .29  -.23   .42   .3  .09  .08 |   -7.3  -27.8    1.3
gfz  57 | .00  .00  .00   .04   .04  -.33  -.1  .05  .05 |   -8.8     .5     .5
igr  n/a| .00 -.01  .00   .23  -.10  -.05   .0  .13  .06 |     .1     .7     .5
jpl  37 | .00  .01 -.01   .16  -.10   .04   .2  .04  .04 |  796.6  103.3     .5
ngs  51 | .01 -.07 -.03   .26   .35   .42   .0  .16  .15 |   -7.1   -1.0   79.6
sio  107| .00  .00  .01  -.04   .06  -.07   .1  .05  .04 |     .0     .0     .0

Table 2.0931.2   GPS week: 0931   Day: 2   MJD: 50763.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  84 | .00  .01  .00  -.29   .06  -.02  -.4  .05  .04 |    9.6  -15.9     .5
emr  27 | .01 -.02 -.02   .48  -.15   .60   .1  .12  .12 |   50.8   -6.5     .4
esa  51 |-.01  .00  .01   .17  -.40   .63   .3  .09  .09 |  -10.9  -40.8    1.3
gfz  55 | .00  .00  .01   .03  -.05  -.34  -.1  .04  .04 |    4.6   -8.1     .3
igr  n/a| .01 -.01 -.01   .21   .12   .44   .1  .05  .04 |     .0    -.5     .3
jpl  37 | .00  .01 -.01  -.17  -.02   .14   .5  .05  .05 |  911.4  101.1     .3
ngs  50 | .00 -.04 -.01   .61   .16   .40  -.2  .18  .18 |     .9   -4.3   79.9
sio  108| .00  .00  .00   .02   .16  -.38   .0  .05  .05 |     .0     .0     .0

Table 2.0931.3   GPS week: 0931   Day: 3   MJD: 50764.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  84 | .00  .00  .00  -.18   .06   .07  -.3  .04  .04 |    4.8     .3     .8
emr  31 |-.01 -.02 -.03   .24  -.19   .56   .2  .11  .10 |   49.4   -2.3     .7
esa  51 | .01  .01  .02  -.16  -.25   .49   .3  .12  .07 |   20.3  -19.8    1.6
gfz  56 | .00 -.01  .00   .21  -.02  -.31  -.2  .05  .05 |    7.3   -3.5     .7
igr  n/a| .00 -.01  .00   .35   .18  -.13  -.1  .08  .06 |    -.4     .1     .8
jpl  37 | .00  .00  .00  -.17  -.09  -.07   .3  .04  .04 | 1018.1  105.1     .7
ngs  53 |-.02 -.05 -.01   .50   .05   .06  -.8  .19  .18 |    1.9     .5   81.0
sio  110| .00  .00  .00   .02   .13  -.07   .1  .05  .05 |     .0     .0     .0

Table 2.0931.4   GPS week: 0931   Day: 4   MJD: 50765.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  84 | .00  .01  .00  -.25   .14  -.13  -.3  .05  .04 |   11.9  -10.7     .3
emr  29 | .00 -.02 -.01   .48   .09   .70  -.1  .10  .10 |   49.0     .1     .3
esa  50 | .00  .01  .01  -.27   .00   .38   .3  .08  .07 |  -27.3  -33.4    3.6
gfz  56 | .00 -.01  .00   .17  -.13  -.37  -.3  .04  .04 |   11.9   -5.6     .3
igr  n/a| .00 -.01  .00   .04   .16   .61   .1  .06  .05 |     .7   -1.4     .7
jpl  37 | .00  .01  .00  -.09  -.17   .03   .3  .04  .04 | 1125.4  108.3     .2
ngs  53 |-.01 -.04  .00   .73   .57   .61  -.4  .19  .16 |    8.0   -7.8   79.9
sio  110|-.01  .00 -.01  -.16   .14  -.17   .0  .07  .07 |     .0     .0     .0

Table 2.0931.5   GPS week: 0931   Day: 5   MJD: 50766.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  86 | .01  .02  .00  -.19   .07   .02  -.3  .05  .05 |    4.3   -4.4     .4
emr  28 | .01 -.02 -.01   .22  -.15   .55   .0  .11  .11 |   43.8   -2.8     .5
esa  52 | .01  .01  .00  -.03  -.13   .42   .2  .11  .08 |  -14.7  -19.1    1.6
gfz  56 |-.01  .00  .01   .26   .01  -.32  -.1  .05  .05 |    2.1     .7     .4
igr  n/a|-.02 -.02  .00   .14  -.10   .14   .0  .07  .06 |     .4    -.6     .5
jpl  37 | .01  .01 -.01  -.27  -.18   .01   .4  .06  .06 | 1227.4  105.9     .4
ngs  53 |-.02 -.04  .02   .73  -.06  -.04   .1  .18  .18 |    2.5   -3.6   78.6
sio  110| .00  .00  .00  -.16   .20  -.12   .1  .08  .07 |     .0     .0     .0

Table 2.0931.6   GPS week: 0931   Day: 6   MJD: 50767.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .02  .00  -.31   .10   .24  -.3  .07  .05 |    8.9  -10.4     .3
emr  32 | .00 -.02 -.01   .21  -.14   .61   .0  .10  .10 | 1332.5  103.2     .3
esa  49 | .01  .01  .01  -.10  -.16   .51   .4  .12  .09 |    9.0  -17.3    2.1
gfz  53 | .00 -.01  .00   .25   .06  -.43   .0  .04  .04 |    7.6  -11.8     .3
igr  n/a| .00 -.01 -.01   .40   .08   .08   .0  .08  .06 |     .1    -.3     .3
jpl  37 | .01  .01 -.01  -.18  -.14  -.20   .4  .08  .08 | 1333.4  103.7     .3
ngs  50 |-.02 -.03  .02   .34   .05   .11  -.5  .19  .19 |    4.1   -5.5   79.8
sio  111| .00  .00  .00  -.05   .09  -.04  -.1  .09  .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 3.0931.0   GPS week: 0931   Day: 0   MJD: 50761.0

               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  |   3   8   5   5   4   4  10   7    2 |    5   8   7   6   8   6  12   9    5
   2  |   5  11   8   4   5   4  15   6    3 |    7  12   7   7   9   6  15   7    6
   3  |   4   8   5   3   4   4  10   5    2 |    5   8   5   5   8   4  10   7    4
   4  |   5  13   9   5   8   4  17   6    3 |    4  16   4   7  11   4  17   5    4
   5  |   6  10   4   5   4   5  12   7    3 |    6   9   6   6   7   3  13   5    4
   6  |   2   7   5   2   5   4  15   7    2 |    5   9   7   6   9   4  13  10    5
   7  |   4   9   4   3   6   3  10   5    2 |    5   8   5   4   8   4  10   5    3
   9  |   4   9   3   5   3   3  12   5    2 |    4   8   3   4   5   3  12   5    4
  10  |   4   6  15   4   4   4   6   6    3 |    6  10   6   7   7   5   8   5    5
  13  |   6 ---  10 ---  11 ---  13 ---    6 |    4 ---   1 ---  13 ---  10 ---    4
  14  |   4   9   5   4   4   3   8   3    2 |    7   9   8   7   8   7  11   7    7
  15  |   5  19   8   4   6   4  23   5    3 |   17  22  19  17  18  18  23  16   18
  16  |   3  12  10   4   4   4  13   4    2 |    5  11   5   3   4   3  11   4    3
  17  |   5  13   4   4   8   3  19   5    3 |   14  17  12  11  13  12  20  11   13
  18  |   4   8  10   4   4   3   8   6    2 |    7  11  11   8  10   8  13   8    8
  19  |   3  10   8   2   5   3  15   4    2 |    3   8   6   5   6   4  12   5    3
  21  |   4  11   6   3   4   4   7   5    2 |    6  10   7   5   7   5  11   6    5
  22  |   4  13   9   2   4   3  15   3    2 |    6  12   5   5   7   5  23   4    5
  23  |   7  14   8   5   7   4  12   8    3 |    5  10   8   6   5   5  15   9    5
  24  |   4  21  12   4   7   5  19   4    3 |    8  16  11   9   9   9  16  10    8
  25  |   3  13   4   6   4   3  13   5    2 |    5   7   5   7   6   3  16   5    4
  26  |   4   9   8   5   5   3  14   7    2 |    6  10   8   8   9   6  12   8    7
  27  |   3  10   8   3   4   4  11   5    2 |    5  10   6   7   7   5  15   5    4
  29  |   2   8   5   4   3   3   7   3    2 |    6   8   6   7   7   6  11   6    6
  30  |   5  10   5   4   4   4  15  10    3 |    5  10   5   7   7   4  16   8    4
  31  |   4   8   6   5   5   2  11   4    2 |    4   7   5   5   5   4  10   6    3
------|--------------------------------------|--------------------------------------
 RMS  |   4  11   8   4   5   4  13   6      |T   6  11   7   7   8   6  14   7    6
 WRMS |   4  11   7   4   5   4  13   5      |NE  6  11   7   7   8   6  14   7    6
 MEDI |   4  10   7   4   4   4  13   5      |MD  5  10   6   7   8   5  13   6    5

Table 3.0931.1   GPS week: 0931   Day: 1   MJD: 50762.0

               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   7   4   3   5   5  16   4    2 |    4   8   7   7   7   5  12   7    4
   2  |   3   8   4   4   6   4  17   4    2 |    4  11   8   6   9   5  14   6    5
   3  |   4   9   5   4   5   3  17   5    2 |    5   9   6   6   9   3  10   5    4
   4  |   4  18   9   5   8   4  11   3    3 |    3  15   4   6  10   3  12   4    3
   5  |   6  12   7   3   6   4  12   5    2 |    5   9   5   4   7   4  14   6    3
   6  |   4  10  12   5   7   5  13   9    3 |    3  10   6   5   7   3  17  12    3
   7  |   4  11   5   4   6   3  12   4    2 |    4  11   6   4   8   3  14   4    3
   9  |   4  10   5   4   4   3  14   4    2 |    5  12   4   5   6   4  14   5    5
  10  |   4  23  11   3   9   4   7   3    3 |    5  24   5   5  10   5   7   4    5
  13  |   9 --- --- ---  58 ---  14   7    6 |    5 --- --- ---  21 ---  12   1    4
  14  |   3   6   4   6   4   3  17   4    2 |    7  12   9  10   9   8  12   7    9
  15  |   2  11   6   4   7   6  31   3    3 |    9  16   9  10  11   9  29   8   10
  16  |   3  11   9   4   4   3  10   4    2 |    3   8   4   3   6   3   8   4    3
  17  |   4  22  10   6   7   4  25   4    4 |    8  20  10   9  10   7  25   8    9
  18  |   4   5  15   6   6   6   8   3    3 |    4   8   5   7   7   7   9   6    4
  19  |   4   9   8   5   3   4  17   4    2 |    3   9   4   6   5   3  12   5    3
  21  |   5  10   6   3   6   3  16   5    2 |    4   8   5   5   7   4  12   7    5
  22  |   5  12  11   4   7   4  20   5    3 |    4  13   4   5   9   4  19   4    5
  23  |   8  14   8   5   4   5  13   5    3 |    4  12   8   6   6   5  11   7    5
  24  |   5  19   8   6   7   5  19   5    3 |    6  17   7   7  11   7  24   9    6
  25  |   3   7   4   4   5   3  15   4    2 |    3   7   5   6   7   3  19   6    4
  26  |   4   9   7   4   8   3   9   4    2 |    3  10   5   5   7   3   8   6    4
  27  |   3   9  18   3   4   4  16   2    3 |    4   9   6   6   7   5  12   8    4
  29  |   3   9   3   3   4   3  11   5    2 |    5   8   6   6   7   5  10   6    5
  30  |   4   9   8   4   7   3  18   5    2 |    4  10   6   5   7   3  17   5    3
  31  |   4  10   9   7   4   2  13   3    2 |    4  11   5   5   6   3  13   4    3
------|--------------------------------------|--------------------------------------
 RMS  |   4  12   9   5  13   4  16   5      |T   4  12   6   6   8   4  15   6    5
 WRMS |   4  12   8   5   6   4  15   4      |NE  4  12   6   6   8   4  15   6    5
 MEDI |   4  10   8   4   6   4  15   4      |MD  4  10   6   6   7   4  12   6    4

Table 3.0931.2   GPS week: 0931   Day: 2   MJD: 50763.0

               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  14   7   4   3   3  10   5    2 |    4  12   6   6   9   5  10   5    4
   2  |   4  11   9   4   4   8  17   5    3 |    5  13   6   6   8   6  14   7    4
   3  |   4   6   7   5   5   5  16   6    2 |    4   7   9   8   8   4  13   8    4
   4  |   4  11  10   5   5   5  16   6    3 |    5  12   8   7   7   4  15   8    5
   5  |   5  11   9   5   3   5  25   4    3 |    6  10   9   5   8   3  21   5    4
   6  |   3   8   7   3   4   5  12   5    2 |    4  10   6   4   6   3  15   7    4
   7  |   4   6   8   4   3   4  17   6    2 |    4   8   7   5   7   3  14   6    4
   9  |   4  11   6   4   3   5  18   5    3 |    5  12   4   5   6   3  19   5    5
  10  |   5   6   8   4   2   4  11   5    2 |    5   6   5   4   4   4   9   5    2
  13  |   9 ---  13 ---  10 ---  16 ---    8 |    7 ---  14 ---  11 ---  19 ---    8
  14  |   5  18   4   6   4   4  19   6    3 |   10  24  15  12  15  14  19  12   12
  15  |   3  18   6   5   5   8  25   6    4 |   10  16  14   9  12  12  30  10   11
  16  |   4  16   7   4   3   4  19   6    3 |    5  14   8   5   6   5  12   7    5
  17  |   4  15   4   4   7   4  27   5    3 |    6  18   6   7  10   5  28   7    6
  18  |   4  10  15   5   5   6  12   5    3 |    6  11  17   6  11   7  16  11    8
  19  |   5  12  15   7   6   8  11   6    3 |    3  10   3   8   5   9  13   8    5
  21  |   5  10   6   3   4   4  11   4    2 |    4   9   4   3   6   4   9   6    3
  22  |   5  13   9   4   3   4  20   4    3 |    4  11   6   5   6   3  21   6    4
  23  |  10  20   8   5   6   5  11   6    4 |    4   9   6   6   5   4   8   8    3
  24  |   4  17   6   4   4   4  17   5    3 |    6  21  10   7  10   6  21   9    6
  25  |   4  12   6   5   4   3  24   5    3 |    4  14   7   6   9   5  24   5    5
  26  |   5   7   7   4   5   2  21   4    2 |    6   9   6   5   6   4  23   6    5
  27  |   4  11  13   2   5   5  13   4    3 |    5  10   4   5   7   5  15   6    4
  29  |   2   8   5   4   3   3  14   5    2 |    4   8   7   5   6   5   7   6    4
  30  |   4  10  11   3   4   4  25   6    3 |    4  12  12   4   8   3  21   6    4
  31  |   4   9  10   4   4   3  16   4    2 |    4   9   8   5   6   4  14   6    3
------|--------------------------------------|--------------------------------------
 RMS  |   5  12   9   4   5   5  18   5      |T   5  12   8   6   8   5  17   7    5
 WRMS |   4  12   9   4   4   5  18   5      |NE  5  12   8   6   8   5  17   7    5
 MEDI |   4  11   8   4   4   4  17   5      |MD  5  11   7   5   7   4  15   6    4

Table 3.0931.3   GPS week: 0931   Day: 3   MJD: 50764.0

               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   8   6   3   4   2  14   4    2 |    5   8   8   7  11   6  17   8    6
   2  |   3   9   9   3   6   3  16   4    2 |    5  12   7   6  11   6  15   7    5
   3  |   5   7   7   3   6   3  11   4    2 |    5   8   8   5   8   4  15   6    3
   4  |   4  14   9   6   8   4  26   5    3 |    4  13   5   9  11   4  23   6    5
   5  |   4  12   6   4   6   5  15   4    2 |    5  10   7   6   9   4  13   3    4
   6  |   3   7   6   5   5   6  10   6    2 |    4  10   5   6  11   4  13   8    4
   7  |   4   8   9   5   7   3  18   5    2 |    5   8   8   6  10   5  14   5    4
   9  |   3   9   5   5   5   4  21   4    2 |    5   9   5   5   8   4  24   5    5
  10  |   3  11   8   7   4   4  10   5    3 |    5   9   8   8   9   6   7   7    5
  13  |   8 ---  11 ---  14 ---  14  10    6 |    7 ---  11 ---  12 ---  19  11   10
  14  |   4   7   5   5   6   3  18   4    2 |    7   8   8   7   9   7  10   7    7
  15  |   4  17   8   5   6   4  28   8    3 |   11  14  14  12  13  10  22  10   11
  16  |   3  11   9   3   5   3  14   3    2 |    4   8   5   6   7   6  11   6    4
  17  |   3  11   8   4  15   4  25   4    3 |    5  15  10   7  16   6  27   6    6
  18  |   4   9   7   5   4   3  10   4    2 |    6  11  11   9  12   8  15   9    7
  19  |   5  12  47   8  15   4  18   5    6 |    4   7  36   5  12   4  15   5    5
  21  |   3   7   8   4   9   3  17   5    2 |    6   9  11   6  14   5  13   6    5
  22  |   4   8   6   3   7   3  24   4    2 |    4  10   6   8  11   6  26   6    6
  23  |   7  24  17   7  18   6  29   9    5 |    0   0   0   0   0   0   0   0  ---
  24  |   4  17   9   6   6   5  18   3    3 |    7  18   7   8   9   6  20   7    6
  25  |   3  12   5   6   5   3  20   7    3 |    4  10   6   7  10   4  19   8    4
  26  |   5   9  10   3   6   3  19   6    3 |    7  12   8   7  10   6  20  11    7
  27  |   3   7  10   2   5   4  17   4    2 |    5   8  14   5   9   4  17   6    4
  29  |   2   8   3   3   4   3   9   4    2 |    7   9   7   8   9   7  11   7    7
  30  |   4  12   6   3   7   3  17   5    2 |    4  12   8   6  10   5  15   6    4
  31  |   5   8   6   7   8   2  24   5    3 |    4   8  12   6   8   5  16   6    4
------|--------------------------------------|--------------------------------------
 RMS  |   4  11  12   5   8   4  19   5      |T   5  10  11   7  10   5  17   7    5
 WRMS |   4  10   7   5   6   4  18   5      |NE  5  10  10   6  10   5  17   6    5
 MEDI |   4   9   8   5   6   3  18   5      |MD  5  10   8   7  10   6  15   6    5

Table 3.0931.4   GPS week: 0931   Day: 4   MJD: 50765.0

               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   6   5   3   4   3  10   9    2 |    5   9   7   8   7   5  15   9    5
   2  |   5  10  10   4   3   5  14   7    3 |    5  14   9   8   8   6  17   9    6
   3  |   4   9   8   3   4   4  13   7    2 |    6   9   7   5   6   5  15   8    4
   4  |   4  10   8   7   7   5  21   8    3 |    5  10   8   8   8   4  18   8    4
   5  |   7   8  11   4   5   5  24   6    3 |    3   8   8   6   6   4  19   6    3
   6  |   4  11   4   7   4   5  13   6    3 |    3  10   7   8   7   4  17  10    5
   7  |   4   9   5   5   6   2  13   9    3 |    4   8   7   7   9   4  14  10    4
   9  |   4   7   8   4   4   4  16   6    2 |    5  10   5   6   5   4  14   7    5
  10  |   5  10   4   4   3   4  13   7    2 |    5   9   7   6   6   5  11   7    4
  13  |   6 ---   8 ---   9 ---  21 ---    7 |    5 ---   7 ---  11 ---  26 ---    7
  14  |   5   8   6   5   3   4  14   8    2 |    6  10  10   8   7   7  10  10    7
  15  |   4  14   9   3   5   5  24  10    3 |    9  13   8   9  10  10  24  16   10
  16  |   6   9   7   5   4   3  20   6    3 |    7   7   5   6   7   6  11  10    6
  17  |   4  18   6   5   6   4  18   5    3 |    7  19   7   8  10   6  24   8    7
  18  |   5  10   7   4   5   3  10   6    2 |    4  10   7   7   8   6  13   8    6
  19  |   7   8   5   4   4   3  18   6    2 |    5  10  12   5   7   4  17   9    4
  21  |   4   9   5   3   4   4  14   6    2 |    5   8   5   8   9   6  20   9    6
  22  |   5   8   4   4   5   3  25   5    3 |    5  13  10   7   7   4  27   5    5
  23  |   7  12  23   4  19   6  25   5    4 |   18   9  22  15  12  18  12  17   16
  24  |   3  16   9   5   6   4  19   6    3 |    6  15   9   8   9   5  19   6    6
  25  |   4   9   5   6   4   4  16   8    3 |    5   9   6   7   7   4  18   9    5
  26  |   5   7   5   4   5   4  24   9    3 |    5  11   8   6   7   6  25  12    6
  27  |   3  10   6   2   5   4  16   9    3 |    5   9   5   7   7   5  20  11    5
  29  |   3   7   6   4   4   3   9   5    2 |    6  11   7   8   8   7  12   8    6
  30  |   5  12   7   4   8   3  33   8    3 |    3  13   8   6   8   5  30   9    4
  31  |   4   9   6   4   3   4  14   6    2 |    4   9   8   7   6   4  15   9    4
------|--------------------------------------|--------------------------------------
 RMS  |   5  10   8   4   6   4  19   7      |T   6  10   8   7   7   6  18   9    6
 WRMS |   4  10   7   4   5   4  16   7      |NE  6  10   8   7   7   6  18   9    6
 MEDI |   4   9   6   4   5   4  16   6      |MD  5  10   7   7   7   5  17   9    5

Table 3.0931.5   GPS week: 0931   Day: 5   MJD: 50766.0

               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  12  10   2   4   3  10   7    2 |    4   9  12   6   7   5  15  10    5
   2  |   5  11   6   6   8   5  15   8    3 |    6  12   8   7  11   6  19   7    6
   3  |   4  11   9   4   5   6  17   7    3 |    3  11   7   6   9   4  18   9    4
   4  |   4  14   8   7   9   5  23   9    4 |    5  16  10   9  11   5  18   8    5
   5  |   7  11   8   4   8   6  21   5    3 |    4  10   5   5   7   5  16   5    3
   6  |   3   8  11   3   5   7  14   7    3 |    3  10   8   7   9   5  13   9    4
   7  |   4  10   7   6   6   3  17   7    3 |    3   8   7   7   6   4  15   6    4
   9  |   5   7   6   4   5   5  22   7    3 |    7  10   6   5   9   5  19   7    6
  10  |   4   7  14   5   6   6  16   9    3 |    7   9   5   9  10   5  14   9    6
  13  |   6 ---  11 ---  14 ---  14  11    5 |    4 ---   7 ---  12 ---  18  12    6
  14  |   6   9  15   6   7   3  12   7    3 |    6  10  12   9  10   8  12   7    7
  15  |   4  19  10   3   7   4  22   8    4 |    7  11   7   7  11   8  21   9    7
  16  |  11  17 ---  12  14  22  25  17    7 |   11   8 ---   9  10  34  16  22   12
  17  |   4  14   8   4  10   4  24   7    3 |    7  17   9   7  11   7  25   6    7
  18  |   6   9   6   4   6   4  12   5    2 |    5  10   8   6   9   6  13   7    5
  19  |   5   7   6   5   5   3  12   7    2 |    5   7   7   5   5   3  17   5    3
  21  |   5   7   6   3   5   3  13   6    2 |    6   8   8   6   7   5  15   9    5
  22  |   5  12  14   4   5   4  21   6    3 |    4  10   7   6   8   4  25   7    4
  23  |   5 ---  30   5  13   5  26   7    5 |   28 ---  15  25  21  28  25  30   25
  24  |   4  16  17   5   5   6  18   6    4 |    9  18  10  10  11   8  20   9    7
  25  |   5  11   5   7   5   3  15  12    3 |    5   9   6   6   6   4  16   9    3
  26  |   5  10  11   3   4   4  18   7    3 |    4  12   8   5   7   4  19   8    5
  27  |   3  10   9   3   5   3  13   6    2 |    4   9   8   5   9   5  17   9    4
  29  |   2  10   6   3   4   2  13   6    2 |    4   9   7   6   7   5  14   7    4
  30  |   6  12   7   4   6   4  19   6    3 |    3  11   6   6   7   3  13   4    2
  31  |   3  10  11   4   6   3  16   6    3 |    3  10   7   5   8   4  16   5    3
------|--------------------------------------|--------------------------------------
 RMS  |   5  11  11   5   7   6  18   8      |T   7  10   8   8   9  10  17  10    7
 WRMS |   5  11   8   5   6   6  18   7      |NE  7  10   8   8   9  10  17  10    7
 MEDI |   5  11   9   4   6   4  17   7      |MD  5  10   7   6   9   5  17   8    5

Table 3.0931.6   GPS week: 0931   Day: 6   MJD: 50767.0

               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  |   6   7   8   4   3   5  19   7    3 |    6   8  11   8   7   6  21  10    6
   2  |   7   8  13   3   4   5  20   7    3 |   10  21  25  15  16  13  25  16   14
   3  |   4   7   7   5   7   5  13   8    3 |    6   9   8   8   8   4  17   9    6
   4  |   5  12  10   5   7   6  21   9    3 |    6  11   9   8   8   5  17  10    6
   5  |   6  10   8   2   5   5  20   5    3 |    4  10   7   6   7   5  16   5    4
   6  |   4   8  11   3   4   6  12   6    3 |    5   9   6   7   8   6  14   6    4
   7  |   4   9   4   4   6   3  12   8    2 |    5   9   7   6   8   5  12   8    4
   9  |   4  10   5   3   6   5  21   6    3 |    7  12   6   6   7   6  22   7    7
  10  |   3  11   9   3   9   8  13   9    3 |    7  11   6   7   9   6  13  11    6
  13  |   4 ---   8 ---  17 ---  18 ---    6 |    4 ---   6 ---  14 ---  16 ---    3
  14  |  22 --- --- ---  26  35  30  24   16 |    4 --- --- ---  20  39   4   3   13
  15  |   6  22   7   4   4   4  23   9    4 |   15  19  16  14  16  15  25  14   15
  16  |   7  10  23   8   7   5  18   8    4 |   39  30  42  37  37  40  35  41   39
  17  |   4  10   9   4   6   3  24   7    3 |   12  20  13  12  12  10  22  10   12
  18  |   5   6  12   5   5   3  11   6    3 |    8  10  11   9   9   8  16   9    7
  19  |   3   8   9   4   4   3  17   7    3 |    5   9   8   4   5   3  17   7    4
  21  |   5   6  12   4   4   4  15   7    3 |    7  10   9   7   8   6  19   8    6
  22  |   6  10   7   4   6   4  21   7    3 |    5  12   8   7  10   6  22   8    6
  23  |  10  11  30   5  14   6  35   7    5 |    0   0   0   0   0   0   0   0  ---
  24  |   5  16  11   4   5   6  20   7    4 |    8  19  10  10  11   7  19  12    9
  25  |   3   7   5   5   4   3  12   7    2 |    4   7   6   6   6   4  14   8    4
  26  |   4   8  10   4   4   3  20   8    3 |    7  12   8   7   8   6  23  10    6
  27  |   2   9  11   4   5   6  15   7    3 |    7   8   7   6   9   5  23  13    6
  29  |   4   9   5   4   4   3   7  10    2 |    6   9   7   8   8   6  13  12    6
  30  |   4  10   6   4   5   4  18   6    3 |    5  11   6   7   8   5  16   6    4
  31  |   5  10  12   6   5   3  20   9    3 |    5   8   9   7   7   5  17   8    4
------|--------------------------------------|--------------------------------------
 RMS  |   7  10  12   4   8   8  19   9      |T  10  13  13  11  12  13  19  12   10
 WRMS |   5  10   9   4   6   8  19   7      |NE 10  13  12  11  12  12  18  12   10
 MEDI |   5  10   9   4   5   5  19   7      |MD  6  10   8   7   8   6  17   9    6

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 4.0931   GPS week: 0931   MJD: 50761.0-50767.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |U  38   31   80 |U  40   26   81 |   30   17   42 |
emr | emr 2222 |   37   32   83 |   45   29   83 |U  33   21   47 |
esa | esa 2264 |   39   32   78 |U  43   32   86 |   39   21   57 |
gfz | gfz 1181 |   41   33   87 |U  42   29   84 |   38   22   45 |
igr | igr 2406 |   38   31   83 |   42   27   80 |   31   18   45 |
igs | igs 2496 |   37   31   80 |   40   27   79 |   31   17   43 |
jpl | jpl 2370 |   39   30   86 |   43   28   81 |   31   16   44 |

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 5.0931.0   GPS week: 0931   Day: 0   MJD: 50761.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   39   27   81 |   38   28   76 |   21   13   45 |
emr | emr 2197 |   34   26   80 |   44   36   80 |   24   23   51 |
esa | esa 2352 |   42   30   78 |   38   34   87 |   28   24   54 |
gfz | gfz 1190 |   43   31   92 |   42   28   82 |   24   22   51 |
igr | igr 2398 |   39   28   88 |   42   28   78 |   21   16   46 |
igs | igs 2496 |   39   28   85 |   38   31   76 |   21   14   45 |
jpl | jpl 2380 |   40   26   85 |   40   28   75 |   23   13   46 |

Table 5.0931.1   GPS week: 0931   Day: 1   MJD: 50762.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2494 |   43   25   70 |   28   21   73 |   24   19   38 |
emr | emr 2181 |   42   28   75 |   36   27   90 |   27   20   45 |
esa | esa 2372 |   46   24   67 |   32   23   76 |   30   19   47 |
gfz | gfz 1192 |   52   26   83 |   36   26   85 |   26   20   36 |
igr | igr 2393 |   45   25   77 |   31   23   72 |   23   18   40 |
igs | igs 2495 |   46   25   70 |   30   22   72 |   23   16   39 |
jpl | jpl 2383 |   47   25   78 |   32   26   72 |   23   16   38 |

Table 5.0931.2   GPS week: 0931   Day: 2   MJD: 50763.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   43   28   74 |   52   27   74 |   52   15   49 |
emr | emr 2173 |   40   31   73 |   60   27   74 |   54   17   52 |
esa | esa 2364 |   42   30   76 |   62   30   74 |   54   20   74 |
gfz | gfz 1192 |   40   28   70 |   56   30   87 |   71   16   52 |
igr | igr 2399 |   42   28   77 |   57   28   70 |   51   15   51 |
igs | igs 2495 |   43   30   76 |   53   27   71 |   51   15   52 |
jpl | jpl 2356 |   45   30   81 |   60   32   76 |   51   14   51 |

Table 5.0931.3   GPS week: 0931   Day: 3   MJD: 50764.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   36   33   72 |   39   26   87 |   18   15   40 |
emr | emr 2107 |   41   31   79 |   45   28   79 |   23   18   48 |
esa | esa 2360 |   31   37   70 |   43   32   91 |   32   19   53 |
gfz | gfz 1173 |   35   30   80 |   42   31   88 |   21   18   40 |
igr | igr 2396 |   34   34   73 |   41   27   86 |   20   17   39 |
igs | igs 2496 |   31   33   71 |   40   28   86 |   21   15   37 |
jpl | jpl 2354 |   34   31   77 |   41   28   85 |   20   15   41 |

Table 5.0931.4   GPS week: 0931   Day: 4   MJD: 50765.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   38   30   74 |   41   24   89 |   32   20   48 |
emr | emr 2396 |   36   32   72 |   39   24   82 |   34   24   50 |
esa | esa 2305 |   37   28   73 |   37   28   91 |   36   25   54 |
gfz | gfz 1188 |   42   30   75 |   42   28   96 |   38   31   54 |
igr | igr 2399 |   36   30   74 |   38   25   83 |   36   23   55 |
igs | igs 2496 |   36   31   72 |   43   25   88 |   33   22   49 |
jpl | jpl 2350 |   36   28   79 |   40   23   84 |   33   21   50 |

Table 5.0931.5   GPS week: 0931   Day: 5   MJD: 50766.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   30   32   90 |   28   20   74 |   28   14   38 |
emr | emr 2297 |   31   28   92 |   36   24   76 |   32   19   43 |
esa | esa 2173 |   34   33   88 |   30   27   82 |   44   22   55 |
gfz | gfz 1190 |   27   34   89 |   31   24   73 |   33   16   43 |
igr | igr 2457 |   30   31   91 |   28   23   74 |   32   15   42 |
igs | igs 2496 |   28   32   89 |   28   21   73 |   31   14   40 |
jpl | jpl 2383 |   32   31   98 |   32   22   81 |   30   14   42 |

Table 5.0931.6   GPS week: 0931   Day: 6   MJD: 50767.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   34   40   93 |   45   32   89 |   24   19   36 |
emr | emr 2201 |   37   43  104 |   52   34   97 |   28   24   42 |
esa | esa 1925 |   36   41   92 |   51   43   97 |   44   19   56 |
gfz | gfz 1140 |   42   46  112 |   41   32   77 |   28   26   39 |
igr | igr 2400 |   35   39   96 |   49   31   92 |   24   20   40 |
igs | igs 2496 |   34   39   96 |   45   32   88 |   24   19   38 |
jpl | jpl 2383 |   36   38  101 |   49   32   92 |   24   18   38 |

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 RMS: RMS of AC LOD BIAS (us)                              
                                                                               
         FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
               for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 6.0931   GPS week: 0931   MJD: 50761.5-50767.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -11     29      6      4     -5 |     -14     25
            |      3      9     17     19     16 |       1
emr   uuuuu |     20    -25     33     44      3 |      -2     40
            |      8     13     48     59     40 |       5
esa   uuuuu |     14    -11    -27    -32      4 |      16     29
            |      9     20     29     32     18 |       3
gfz   uuuuu |      7    -16      9      5    -13 |       1     26
            |      6     11      9     15     15 |       5
igr   xxxxx |    -11    -21    -24    -10    -14 |      -3     31
            |     11     12     30     28     16 |       5
jpl   uuuuu |     14      8    -17      3     46 |     -41     49
            |      8     17     19     12     15 |       1
ngs   uuuuu |    -40    -37    -16   -114     30 |      -3     38
            |     23     15     68     76     34 |       2
sio   uuuuu |    -24      8      0      6    -97 |      34     67
            |     15      6     32     14     37 |      12
                                                                               
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 RMS: RMS of AC LOD BIAS (us)                              
                                                                               
         FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
               for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 7.0931.0   GPS week: 0931   Day: 0   MJD: 50761.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -14     43     14    -10      1 |     -12     22
emr   uuuuu |     30    -14    -13    148      7 |       4     37
esa   uuuuu |     21    -32    -47    -40      7 |      20     28
gfz   uuuuu |     -4      2      9     -3      1 |       6     21
igr   xxxxx |     -4    -17    -22      6      9 |       3     24
jpl   uuuuu |      9    -12      2      8     52 |     -44     51
ngs   uuuuu |    -39    -52    -68   -123    -26 |       0     35
sio   uuuuu |     -4      6     16      6    -74 |      50     65

Table 7.0931.1   GPS week: 0931   Day: 1   MJD: 50762.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |     -7     35     16     -2     10 |     -13     23
emr   uuuuu |     20     -5     31     42    -10 |       4     37
esa   uuuuu |     14    -36    -48    -12     -5 |      20     28
gfz   uuuuu |      7     -7      9     18     -4 |       5     22
igr   xxxxx |      4    -22      7      0    -19 |       3     24
jpl   uuuuu |     12    -16    -20     -1     38 |     -41     49
ngs   uuuuu |    -44     -8     30   -108      3 |      -3     36
sio   uuuuu |    -15     11      2     -6    -57 |      46     65

Table 7.0931.2   GPS week: 0931   Day: 2   MJD: 50763.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -10     32     -5     32      1 |     -14     25
emr   uuuuu |     30    -47     79      3     -9 |       1     39
esa   uuuuu |     26    -29    -25    -61    -12 |      18     29
gfz   uuuuu |      5    -10     11     24    -10 |       4     24
igr   xxxxx |    -23    -26    -21    -48    -15 |       0     28
jpl   uuuuu |      3     12    -45    -12     59 |     -41     50
ngs   uuuuu |    -40    -44     19   -263     51 |      -4     38
sio   uuuuu |    -16     11     16     32    -99 |      41     65

Table 7.0931.3   GPS week: 0931   Day: 3   MJD: 50764.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -14     17     16     20     11 |     -15     26
emr   uuuuu |     12    -22     77    -26      2 |      -2     40
esa   uuuuu |     18      7    -45    -76      8 |      15     29
gfz   uuuuu |     14    -25     -1     -8    -28 |       2     26
igr   xxxxx |    -19    -22    -47    -46    -42 |      -3     31
jpl   uuuuu |     12     17    -15     25     43 |     -40     48
ngs   uuuuu |    -61    -27     -9   -115     22 |      -5     38
sio   uuuuu |    -15      1    -10     16    -74 |      32     67

Table 7.0931.4   GPS week: 0931   Day: 4   MJD: 50765.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |     -9     20      4    -15      0 |     -15     26
emr   uuuuu |     13    -34    -13     30    -57 |      -5     40
esa   uuuuu |     -3      6      1    -26     18 |      14     29
gfz   uuuuu |     13    -19     15     22    -29 |      -1     28
igr   xxxxx |    -19     -1      6     12    -23 |      -7     35
jpl   uuuuu |     27      7     -6     -5     47 |     -41     49
ngs   uuuuu |    -73    -44     65    -14     69 |      -5     38
sio   uuuuu |    -43     18    -25     -2    -81 |      27     68

Table 7.0931.5   GPS week: 0931   Day: 5   MJD: 50766.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -13     24     25     18    -31 |     -16     27
emr   uuuuu |     13    -25    -20     15     75 |      -8     44
esa   uuuuu |     16      2    -48     21    -20 |      13     29
gfz   uuuuu |     11    -31     -4    -12      8 |      -5     29
igr   xxxxx |      1    -16    -77    -14    -11 |      -9     36
jpl   uuuuu |     16     33      4      8     65 |     -40     48
ngs   uuuuu |     -6    -45   -140   -108     29 |      -2     39
sio   uuuuu |    -42      5     52     -9   -134 |      22     69

Table 7.0931.6   GPS week: 0931   Day: 6   MJD: 50767.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |     -9     31    -25    -15    -24 |     -16     27
emr   uuuuu |     21    -27     87     93     16 |      -8     44
esa   uuuuu |      8      3     24    -34     32 |      13     29
gfz   uuuuu |      2    -18     23     -5    -25 |      -5     29
igr   xxxxx |    -14    -42    -15     21     -1 |      -9     36
jpl   uuuuu |     20     14    -38     -1     19 |     -40     48
ngs   uuuuu |    -17    -39     -7    -68     60 |      -2     39
sio   uuuuu |    -34      3    -48      1   -160 |      22     69

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