Subject: [IGSREPORT-3962] Wk 0913 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 21 Jul 1997 11:21:00 PDT

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IGS Electronic Report    Mon Jul 21 11:21:00 PDT 1997      Message Number 3962
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0913 IGS Final Orbits

Final IGS Orbit Combination - Week 0913   (Jul 06, 1997 - Jul 12, 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 (IGS09137.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 used to integrate 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:

 IGS09130-6.SP3  IGS GPS ephemeris files for days 0-6, week 0913 in SP3 format.
 IGS09137.ERP    Earth Rotation Parameters (ERP) and their rates as well as
                 Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                 with IGS ephemerides.
 IGS09137.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 non-SA satellites:

                  Day | PRN list
                  ----+---------
                  0-6 |  15 

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
                  ----+--------+---------------
                   5  |  ESA   |  ALL
                   6  |  ESA   |  ALL

7. The following orbit solutions were excluded from the combination because 
   they were biasing the weighted average (generally indicated by long arc RMS).
   They were still used for statistics computation.

                  Day | Centre | PRN list
                  ----+--------+---------------
                   1  |  GFZ   |  16
                   2  |  ESA   |  16

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 (Jul 08) | 00:00:00 |  19   |   ALL    | Modeling problems (a)
          3 (Jul 09) | 00:00:00 |  10   |   ALL    | Modeling problems
          3 (Jul 09) | 00:00:00 |  16   |   ALL    | Modeling problems (b)
          3 (Jul 09) | 00:00:00 |  21   |   ALL    | Modeling problems

   (a) Satellite PRN19 was excluded from long arc evaluation on day 1 for all
       centres due to unrealistic RMS.
   (b) Satellite PRN16 was excluded from long arc evaluation on day 1 to 2 for
       all centres due to unrealistic RMS.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS09137.SUM).

Table 1: Week 0913 summary.                       (Jul 06, 1997 - Jul 12, 1997)

Table 1.0913.a   GPS week: 0913   MJD: 50635.0-50641.0

         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  79 | .00  .01 -.01  -.40   .06   .26  -.2  .05  .04 |     .6   -3.2     .4
        | .00  .00  .00   .15   .11   .09   .1           |    6.7   10.8
emr  30 | .01 -.02  .00   .39   .04   .52  -.1  .13  .13 |  780.8   76.8     .4
        | .00  .01  .01   .15   .13   .21   .1           |  166.4   12.2
esa  53 | .00  .00  .00   .05  -.20   .04   .2  .09  .06 |    2.4  -53.3    1.6
        | .00  .00  .00   .13   .10   .20   .1           |   14.0   31.1
gfz  50 | .00  .00  .01   .13   .11   .05   .0  .09  .09 |  782.3   77.1     .4
        | .00  .00  .00   .06   .09   .11   .1           |  166.5   12.2
igr  n/a| .00 -.03  .01   .12  -.01   .05   .0  .08  .05 |     .0    -.1     .4
        | .01  .01  .01   .12   .12   .25   .1           |     .5     .6
jpl  36 | .00  .01  .00  -.01  -.17  -.04   .2  .05  .05 |  767.9   68.9     .4
        | .00  .00  .00   .08   .12   .12   .1           |  178.3   27.5
ngs  50 | .01 -.06 -.01   .15   .31  -.04  -.3  .19  .19 |     .3     .0   79.2
        | .01  .01  .01   .32   .22   .33   .2           |    8.4   11.7
sio  108| .00  .01 -.01   .15   .11  -.68  -.2  .07  .06 |     .0     .0     .0
        | .01  .00  .01   .10   .07   .22   .2           |     .0     .0

Table 1.0913.b   GPS week : 0913   MJD: 50635.0-50641.0

         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   4   3   3   3   2 |
   2  |   3   3   3   2   3   3   3 |
   3  |   3   2   3   2   2   3   3 |
   4  |   3   2   3   2   3   2   2 |
   5  |   2   3   3   2   3   2   3 |
   6  |   3   3   3   3   3   3   3 |
   7  |   2   3   3   2   2   2   3 |
   9  |   3   3   3   3   2   2   2 |
  10E |   3   3   4   3   3   3   3 |
  14E |   3   4   4   3   3   3   3 |
  15  |   2   3   2   2   2   2   2 |
  16E |   3  12  11   3   3   3   3 | Modeling problems on day 1 and 2.
  17  |   3   2   3   2   2   3   2 |
  18  |   2   4   4   2   2   2   2 |
  19  |   2  11   3   2   2   3   2 | Modeling problems on day 1.
  21E |   4   5   4   5   4   4   3 |
  22  |   2   3   2   3   3   2   3 |
  23E |   4   5   5   4   4   5   3 |
  24  |   3   2   3   2   2   2   2 |
  25  |   3   2   2   3   2   2   2 |
  26  |   3   3   2   3   2   3   3 |
  27  |   2   3   2   2   2   2   2 |
  29  |   2   2   3   2   2   2   2 |
  30  |   3   3   3   2   3   3   3 |
  31  |   2   3   2   2   2   2   2 |

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 2.0913.0   GPS week: 0913   Day: 0   MJD: 50635.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  78 | .00  .01 -.01  -.28   .18   .32  -.2  .04  .04 |   10.3   -6.1     .5
emr  30 | .01 -.02 -.01   .52  -.03   .39   .0  .13  .13 |  556.2   68.8     .4
esa  51 | .00  .00  .01  -.10  -.07   .18   .0  .05  .05 |  -11.3  -69.6     .9
gfz  48 | .00  .00  .01   .20   .03  -.09  -.1  .06  .06 |  557.7   69.1     .4
igr  n/a| .00 -.03  .01   .07  -.11  -.15   .0  .06  .05 |    -.7     .9     .3
jpl  36 | .00  .00  .01   .03  -.18  -.08   .2  .04  .04 |  557.5   68.9     .4
ngs  49 | .01 -.07  .01  -.09   .14   .01   .0  .16  .16 |   15.3  -15.6   79.2
sio  107|-.01  .01 -.01   .15   .05  -.72  -.1  .07  .07 |     .0     .0     .0

Table 2.0913.1   GPS week: 0913   Day: 1   MJD: 50636.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .01 -.01  -.21   .20   .26  -.4  .07  .04 |    1.8   -5.4     .4
emr  30 | .01 -.01  .00   .32   .01   .20  -.1  .15  .14 |  628.1   67.6     .5
esa  52 | .01 -.01  .00   .24  -.36  -.37   .2  .11  .07 |  -18.1  -68.1    1.0
gfz  50 | .01  .00  .02   .10  -.01  -.06   .0  .18  .18 |  629.4   68.0     .5
igr  n/a| .01 -.03  .00  -.08  -.19  -.24   .2  .12  .05 |    -.6     .4     .5
jpl  36 | .00  .01  .01  -.08  -.35   .16   .2  .07  .07 |  629.4   67.7     .4
ngs  50 | .03 -.07 -.01   .18   .62   .38  -.4  .23  .21 |    8.4   -9.6   78.7
sio  109|-.01  .00 -.01  -.03   .24  -.31   .0  .07  .06 |     .0     .0     .0

Table 2.0913.2   GPS week: 0913   Day: 2   MJD: 50637.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .00 -.01  -.33   .05   .12  -.2  .05  .04 |   -8.3     .7     .3
emr  30 | .00 -.01  .01   .14   .27   .35  -.2  .16  .16 |  697.6   69.3     .4
esa  53 | .00  .01  .01   .23  -.20   .09   .2  .17  .07 |   -5.9  -79.3    1.1
gfz  50 | .00  .00  .02   .08   .12   .15   .0  .06  .06 |  699.3   69.0     .4
igr  n/a| .00 -.03  .00   .09   .15   .14   .0  .14  .06 |     .1    -.3     .5
jpl  35 | .00  .01  .00   .00  -.26   .09   .2  .06  .06 |  599.6   12.7     .4
ngs  52 | .02 -.07  .00  -.09   .32   .31  -.2  .17  .17 |   -4.3     .6   78.8
sio  105|-.01  .01 -.02   .06   .09  -.63  -.2  .07  .06 |     .0     .0     .0

Table 2.0913.3   GPS week: 0913   Day: 3   MJD: 50638.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .01 -.01  -.47  -.05   .15  -.2  .04  .04 |    -.6  -15.2     .4
emr  31 | .01 -.01  .01   .32  -.01   .71   .0  .12  .11 |  777.6   68.1     .4
esa  54 | .00  .00  .00  -.03  -.06   .23   .2  .06  .05 |   11.7  -86.2    1.0
gfz  51 |-.01 -.01  .01   .20   .17   .07   .0  .06  .06 |  779.1   68.7     .4
igr  n/a| .00 -.04  .00   .27   .10   .52   .0  .06  .05 |     .4    -.9     .4
jpl  36 | .00  .01  .00   .10  -.18  -.07   .3  .05  .05 |  779.3   68.0     .4
ngs  48 | .00 -.07 -.01  -.30   .22  -.53  -.3  .20  .19 |   -2.1   -6.7   79.2
sio  106| .00  .01  .00   .22   .05  -.70  -.1  .06  .06 |     .0     .0     .0

Table 2.0913.4   GPS week: 0913   Day: 4   MJD: 50639.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .01  .00  -.63  -.11   .33  -.2  .05  .04 |   -6.1   13.5     .6
emr  30 | .00 -.01 -.01   .62   .04   .60  -.1  .11  .11 |  850.4   92.7     .4
esa  54 | .00  .00  .00   .04  -.21  -.03   .3  .05  .05 |   18.1  -13.0    1.4
gfz  51 | .00  .00  .01   .15   .21   .18   .0  .06  .06 |  852.0   92.8     .4
igr  n/a|-.01 -.03  .01   .23   .01   .08   .0  .07  .06 |     .3    -.5     .5
jpl  37 | .00  .01  .00  -.02  -.12  -.20   .1  .04  .04 |  851.6   93.1     .4
ngs  48 | .00 -.06 -.02   .51   .57  -.02  -.6  .18  .18 |   -8.3   16.0   80.5
sio  111| .01  .01  .00   .14   .13  -.52  -.2  .06  .06 |     .0     .0     .0

Table 2.0913.5   GPS week: 0913   Day: 5   MJD: 50640.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .01 -.01  -.55   .09   .36  -.1  .05  .04 |    7.6  -15.9     .4
emr  31 | .01 -.03 -.01   .35   .12   .59  -.2  .11  .11 |  939.5   75.4     .3
esa  52 | .00  .00  .00   .05  -.24   .11   .3  .05  .05 |    8.5  -47.0    2.3
gfz  50 | .00  .00  .01   .05   .17   .12  -.1  .06  .06 |  941.0   75.9     .4
igr  n/a| .01 -.02  .01   .11   .04  -.05   .0  .05  .05 |     .0     .0     .7
jpl  37 | .00  .01  .00   .04  -.11  -.12   .2  .04  .04 |  940.8   75.8     .3
ngs  52 |-.01 -.06  .00   .52   .00  -.08  -.3  .19  .21 |   -1.5    1.7   78.9
sio  110| .00  .00 -.01   .21   .12  -.93  -.4  .07  .06 |     .0     .0     .0

Table 2.0913.6   GPS week: 0913   Day: 6   MJD: 50641.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .01 -.01  -.36   .03   .28  -.1  .04  .04 |    -.7    6.1     .3
emr  28 | .01 -.04 -.01   .45  -.13   .80   .1  .11  .11 | 1016.2   95.7     .3
esa  53 | .00  .00  .01  -.04  -.25   .09   .1  .05  .05 |   13.5  -10.0    2.8
gfz  50 | .00  .00  .01   .11   .05   .00   .1  .05  .05 | 1017.9   96.3     .3
igr  n/a| .01 -.03  .00   .19  -.05   .05   .0  .05  .05 |     .4    -.6     .2
jpl  37 | .00  .01  .00  -.12   .03  -.05   .3  .04  .04 | 1017.0   96.3     .2
ngs  50 | .00 -.05 -.01   .34   .32  -.36  -.3  .17  .18 |   -5.4   13.7   79.1
sio  109| .01  .01 -.02   .28   .06  -.93  -.5  .07  .06 |     .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 3.0913.0   GPS week: 0913   Day: 0   MJD: 50635.0

               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  15   6   7   5   5  10   7    3 |    7  12   7   6   9   4  13   8    5
   2  |   3  14   6   5   6   2  13   9    3 |    6  13   6   6   7   7  15   7    5
   3  |   4   8   6   4   5   3  19   7    3 |    5  10   4   6   6   4  15   6    4
   4  |   3  12   5   7   4   4  14   8    3 |    4  11   5   6   6   6  17   7    5
   5  |   5  10   4   5   4   3  13   7    2 |    4   8   6   6   6   6  14   7    4
   6  |   4  12   6   8   4   4  17  10    3 |    3  13   6   4   6   5  15   8    4
   7  |   4  11   4   5   6   3  16   5    2 |    3  13   5   8   9   5  18   7    5
   9  |   5  18   6   9   5   2  10   6    3 |    4  14   6   6   6   5  12  10    5
  10E |   4  22   6   7   8   5  16   7    3 |    5  11   7   8   7   4  13   6    5
  14E |   5  16   9   6   5   4  20   8    3 |   14  21  19  17  17  13  30  16   16
  15  |   4  10   4   7   4   3  11   5    2 |    4   9   5   7   7   5  12   5    4
  16E |   4  11   4   6   8   6  21   7    3 |    2   5   2   2   2   2   4   2    2
  17  |   3   8   7   7   5   3  12   9    3 |    5   9   5   6   8   7  11   6    5
  18  |   4   7   4   6   4   4  11   6    2 |    5   7   8   8   7   6  13   9    5
  19  |   3   9   5   3   5   3  15   5    2 |    0   3   1   1   1   1   3   2    1
  21E |   3  23   4   8   7   3  20  10    4 |    3  10   4   5   7   3  18   5    3
  22  |   2   9   3   3   4   4  20   7    2 |    5  11   5   6   6   6  16   6    4
  23E |   4  22   7   6  12   5  32  11    4 |   24  24  21  20  26  21  35  23   22
  24  |   3  11   5   5   5   4  21   7    3 |    3  10   6   5   6   7  15   7    5
  25  |   5   9   4   5   3   5  13  10    3 |    7  10   8  10   7   5  13  11    7
  26  |   4  16   9   8   7   3  11   6    3 |    4  14   8   9   7   5  15   8    6
  27  |   3   8   7   4   7   4  14   6    2 |    4   9   8   7   8   5  15   6    5
  29  |   5   8   4   5   5   4  14   6    2 |    6  10   6   7   7   4  14   8    6
  30  |   4  12   3   8   6   4  16   6    3 |    5  10   7   5   7   5  17   7    5
  31  |   5   9   4   5   6   2  12   6    2 |    6   8   4   8   8   6  14   5    5
------|--------------------------------------|--------------------------------------
 RMS  |   4  13   5   6   6   4  16   7      |T   7  11   7   8   8   6  16   8    7
 WRMS |   4  13   5   6   5   4  16   7      |NE  4  10   6   6   6   5  14   7    4
 MEDI |   4  11   5   6   5   4  14   7      |MD  5  10   6   6   7   5  15   7    5

Table 3.0913.1   GPS week: 0913   Day: 1   MJD: 50636.0

               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   3   4   4   4  20   8    3 |    5  13   3   4   5   4  14   5    3
   2  |   3  13   5   3   5   3  21  10    3 |    3  11   5   4   5   6  21   8    3
   3  |   4   8   5   4   4   3  12   5    2 |    5   9   5   5   5   4  15   5    4
   4  |   3  10   6   6   4   5  15   4    2 |    3  11   5   4   5   4  17   5    2
   5  |   3  10   4   7   5   4  17   4    3 |    4   9   6   6   6   5  17   8    4
   6  |   4   8   5   9   5   4  23   6    3 |    4  10   5   4   6   5  15   6    3
   7  |   4  13   5   7   5   3  25   6    3 |    3  13   5   4   6   4  26   6    4
   9  |   5  18   9   6   5   3  15   9    3 |    4  12   8   4   6   4  17   6    4
  10E |   3  15   6   6   4   3  24   8    3 |    4   9   5   8   8   5  18   7    5
  14E |   4  18  11   5   9   7  24   8    4 |    9  18  10  12  11  11  25  12   10
  15  |   3  13   4   5   5   3  17   6    3 |    4  10   5   4   7   4  18   5    4
  16E |  12 --- ---  81  48  21  52  15   12 |    0 --- ---   0   0   0   0   0  ---
  17  |   3   8   4   4   3   3  15   5    2 |    4  10   5   4   5   5  16   5    4
  18  |   6  16  18  11   8   4  15   8    4 |    5  15  11   7   9   7  18   9    5
  19  |  26  30  36 ---  21  15  33  12   11 |    0   0   0 ---   0   0   0   0  ---
  21E |   4  29   8   9   6   3  32   6    5 |    4  13   4   5   7   4  21   4    3
  22  |   3  10   7   5   4   5  21   5    3 |    3  10   5   5   5   6  15   4    4
  23E |   4  23  11   8  12   8  46   7    5 |   27  20  19  28  24  30  28  30   25
  24  |   2   8   7   6   4   3  20   5    2 |    3   7   5   4   6   4  20   7    2
  25  |   3   7   9   4   4   5  12   6    2 |    6   8  11   8   8   4  13   7    7
  26  |   6  10   7   4   3   2  17   5    3 |    3  11   7   7   5   6  15   9    5
  27  |   3  11  13   4   4   4  12   5    3 |    4  11  11   4   6   5  17   4    3
  29  |   4   6   5   6   3   5  18   4    2 |    2   8   6   4   5   4  14   5    4
  30  |   5  16   7  10   3   2  12   5    3 |    4  12   6   4   6   5  12   6    3
  31  |   4   8   8   6   3   3  13   7    3 |    5   8   9   7   7   3  11   6    4
------|--------------------------------------|--------------------------------------
 RMS  |   7  15  11  18  12   7  23   7      |T   7  11   7   8   8   8  18   8    6
 WRMS |   4  14   7  18   5   7  21   6      |NE  3  10   6   5   5   4  16   6    3
 MEDI |   4  12   7   6   4   4  18   6      |MD  4  11   5   4   6   5  17   6    4

Table 3.0913.2   GPS week: 0913   Day: 2   MJD: 50637.0

               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  28   6   6   6   5  15   5    4 |    6  25   5   4   8   4  12   8    4
   2  |   3  13   8   4   6   4  18   7    3 |    5  10   7   5   8   7  19   8    5
   3  |   4  12   3   4   4   4  19   6    3 |    4  11   4   5   7   4  13   6    3
   4  |   3  10   8   4  10   3  19   4    3 |    3  12   5   4   8   6  17   7    5
   5  |   6  10   5  10   4   4  13   6    3 |    3   8   5   6   7   4  16   9    4
   6  |   5   9   5   8   5   5  12   5    3 |    8  15   6   4   6   5  11   9    6
   7  |   4  17   4   5   5   5  12   7    3 |    3  17   4   4   6   4  15   7    3
   9  |   8  14   6   6   5   3  14  10    3 |    4  14   6   6   8   4  15   9    5
  10E |   3  14   9  10  11   4  22   7    4 |    5   8   7  10   8   4  15   5    5
  14E |   5  24  10   6  12   6  21   8    4 |   16  26  17  15  18  14  26  14   15
  15  |   4  15   5   6   5   3  11   4    2 |    4  12   4   6  10   4  11   5    4
  16E |  16 ---  77 ---  62  18 ---  13   11 |    0 ---   0 ---   0   0 ---   0  ---
  17  |   4  13   5   4   4   5  11  10    3 |    4  12   6   4   7   4  11  10    3
  18  |   5  28  10   5   9   5   9   6    4 |    6  21   8   8  13   8  12   7    5
  19  |   6  13   7   4   7   3  16   4    3 |    4  12   5   5   5   5  12   5    4
  21E |   5  30   6   9   5   2  26   7    4 |    3  11   4   4   5   4  14   5    2
  22  |   2  11   6   4   4   3  15   5    2 |    3  11   5   6   5   4  14   5    3
  23E |   8  22  11   6   8   7  33  11    5 |   28  26  32  32  32  33  40  32   31
  24  |   2  11  10   5   7   6  13   6    3 |    3  13   5   6   5   6  13   7    4
  25  |   2   9   8   3   5   5  13   5    2 |    5  11   7   6   6   5  12   7    5
  26  |   4   9   4   4   6   5  14   4    2 |    5  10   4   5   5   4  12   6    4
  27  |   3  10   5   5   7   5  15   5    2 |    4  12   6   5   7   5  14   5    4
  29  |   5  12   5   5   5   7  19   8    3 |    4  13   8   5   8   5  16  10    4
  30  |   4  13   6  10   5   4  13   5    3 |    4  10   7   5   8   6  12   6    4
  31  |   5  10   3   6   5   4  16   5    2 |    3  10   5   5   8   4  14   5    3
------|--------------------------------------|--------------------------------------
 RMS  |   5  16  17   6  14   6  17   7      |T   7  14   9   8  10   8  16   9    8
 WRMS |   4  16   7   6   6   6  17   6      |NE  4  13   5   5   7   5  13   7    4
 MEDI |   4  13   6   5   5   5  15   6      |MD  4  12   6   5   8   5  14   7    4

Table 3.0913.3   GPS week: 0913   Day: 3   MJD: 50638.0

               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  |   7  13   6   6   4   5  24   5    3 |    6  13   4   5   6   5  17   6    4
   2  |   3   9   3   3   4   3  14   6    2 |    5  10   8   4   4   6  13   6    6
   3  |   4   7   4   5   4   3  22   5    2 |    6   7   6   5   7   3  16   7    5
   4  |   2   7   5   5   7   4  22   4    2 |    3   8   8   4   7   4  19   5    5
   5  |   3   6   5   5   7   6  15   4    2 |    4   7   5   3   8   8  16   6    4
   6  |   6  13   4   8   5   5  13   5    3 |    3  12   6   6   8   8  13   6    6
   7  |   4  10   7   4   4   5  15   5    2 |    3  12  10   6   7   6  15   7    6
   9  |   6  12   6   6   9   6  17   6    3 |    3  12   7   7   9   8  19   9    7
  10E |   6  11   8   7   7   3  32   6    3 |   13  14  14  13  14  12  27  11   12
  14E |   3  16   6   8   9   5  28   4    3 |   17  20  14  13  19  21  25  15   16
  15  |   5  11   5   5   4   3  13   6    2 |    4   8   5   6   5   4  11   4    5
  16E |   6  10   8   6  10   6  24   4    3 |    7  10   6   4  11   8  24   7    6
  17  |   4   7   3   4   4   3   9   4    2 |    5  11   6   6   5   6  12   6    8
  18  |   4   7   5   5   5   4  12   4    2 |    3  11   6   5   7   6  15   5    4
  19  |   3   6   6   4   5   4  11   7    2 |    3   9   5   4   8   5  12  10    5
  21E |   5  30   5   9   5   6  27   7    5 |    7  18  10  11  10  11  21   9    8
  22  |   3   8   4   4   5   3  28   7    3 |    3   8   5   4   5   5  23   8    4
  23E |   7  20  10   4   9  10  36   6    4 |   38  34  29  32  37  36  38  35   34
  24  |   2   9   5   5   4   4  14   4    2 |    3   8   8   4   5   4  12   5    6
  25  |   3   9   6   8   3   5  17   9    3 |    5   9  10   8   5   6  18   9    7
  26  |   5   8   5   5   6   7  20   5    3 |    4  10   6   5   6   6  15   7    5
  27  |   3  11   6   3   5   4  12   7    2 |    4  13   6   6   6   6  14   7    7
  29  |   4   7   4   6   3   6  20   4    2 |    4   8   5   6   6   4  12   6    4
  30  |   2   9   5   6   5   5  18   5    2 |    4   8   7   4   6   5  14   7    5
  31  |   5   7   3   6   4   4  16   4    2 |    4   7   6   8   6   4  15   6    6
------|--------------------------------------|--------------------------------------
 RMS  |   4  12   6   6   6   5  20   6      |T   9  12   9   9  10  10  18  10    9
 WRMS |   4  11   5   6   5   5  19   6      |NE  4   9   6   5   6   5  15   6    5
 MEDI |   4   9   5   5   5   5  17   5      |MD  4  10   6   6   7   6  15   7    6

Table 3.0913.4   GPS week: 0913   Day: 4   MJD: 50639.0

               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   9   4   4   3   4  26   3    3 |    5   8   4   4   5   4  14   5    2
   2  |   2  12   4   3   5   3  22   7    3 |    4  10   7   6   6   6  19   6    4
   3  |   6   7   5   5   6   3  15   7    2 |    5   8   5   6   8   3  15   7    4
   4  |   4  10   5   4   4   4  26   6    3 |    4  13   4   4   7   4  20   8    4
   5  |   3  10   6   5   5   4  13  11    3 |    3   7   5   5   6   5  15  10    3
   6  |   3  11   3  11   5   4   9   7    3 |    3  12   4   7   7   5  14   7    4
   7  |   4   8   4   3   5   4  15   5    2 |    3   9   7   5   6   4  16   7    4
   9  |   5  11   4   4   7   3  10   9    2 |    4   8   4   7   8   4  11  10    4
  10E |   4  11   6  11   8   4  22   7    3 |   15  14  14  15  17  12  27  16   14
  14E |   4  17   5   6   8   5  16   6    3 |   14  19  14  13  13  12  17  12   12
  15  |   4  12   4   4   4   4  14   6    2 |    3   7   5   5   5   5  12   5    3
  16E |   3  14   6   6  10   5  18   6    3 |    4  10   6   4  11   5  20   4    4
  17  |   5   8   4   6   4   4  11   6    2 |    4  10   5   4   6   4  12   5    4
  18  |   4   6   5   8   5   4  12   7    2 |    3   9   9   5   7   7  13   5    3
  19  |   4   6   5   5   3   4  12   6    2 |    3  11   5   5   6   6  10   7    5
  21E |   6  16   9   6  13   4  32   4    4 |    7  21   7   8  11   8  24   9    7
  22  |   4  10   6   5   6   4  17   6    3 |    3  12   8   5   6   6  14   7    4
  23E |  10  19   9   6  13   6  36   6    4 |   27  25  30  35  31  31  28  32   29
  24  |   3   8   4   6   7   3  18   5    2 |    3   8   5   5   7   4  15   7    4
  25  |   3   8   7   5   4   3  15   5    2 |    6   8   7   7   7   6  15  12    6
  26  |   4   8   4   3   7   4  14   5    2 |    4  10   5   5   8   3  18   5    4
  27  |   2   9   4   3   4   3  12   3    2 |    4  10   4   6   7   5  12   5    4
  29  |   5   9   4   4   5   6  14   6    2 |    4   6   7   4   3   6  10   7    3
  30  |   4  14   5   8   5   5  13   5    3 |    4  13   5   4   6   6  11   3    3
  31  |   6   5   4   5   5   2  16   6    2 |    4   5   5   6   7   3  14   4    3
------|--------------------------------------|--------------------------------------
 RMS  |   5  11   5   6   7   4  18   6      |T   7  11   8   9  10   8  16   9    7
 WRMS |   4  11   5   6   6   4  18   6      |NE  3   9   5   5   6   4  14   6    3
 MEDI |   4  10   5   5   5   4  15   6      |MD  4  10   5   5   7   5  15   7    4

Table 3.0913.5   GPS week: 0913   Day: 5   MJD: 50640.0

               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   6   4   4   3   3  24   6    3 |    3   7   3   4   4   4  12   6    3
   2  |   3   9   5   3   5   4  32   8    3 |    6  10   7   5   8   7  21   7    7
   3  |   4   7   4   5   3   3  22   8    3 |    5   7   4   6   5   3  14   8    4
   4  |   4   8   4   5   4   4  12   4    2 |    2  11   5   5   6   4  16   5    5
   5  |   2   8   6   8   4   3  12   7    2 |    3   8   6   5   6   5  11   7    4
   6  |   5   9   4   9   3   4  25   8    3 |    3  11   4   6   6   5  21   7    6
   7  |   4   7   4   5   4   4  20   6    2 |    3   9   5   5   6   5  18   7    5
   9  |   4  13   4   4   7   2  12   5    2 |    4   9   5   5   7   4  12   6    4
  10E |   4   8   6  11   4   4  19  12    3 |   13  16  13  14  13  14  20  17   13
  14E |   8  12   4  10   8   4  17   8    3 |   18  19  15  14  16  16  20  15   16
  15  |   2   8   4   4   5   3  13   4    2 |    3   7   4   4   5   5  15   5    4
  16E |   5  11   4   7   5   3  17   4    3 |    4  11   4   4   8   6  18   4    4
  17  |   5  12   4   6   5   5  16   6    3 |    3  14   5   5   6   5  14   7    6
  18  |   4   9   5   6   5   4   8   5    2 |    6  10   5   5   6   8  12   6    6
  19  |   4  23   6   6   7   3  11   4    3 |    4  21   4   5   7   6   9   8    6
  21E |   7  18   6   6   8   6  31   6    4 |    6  19   7   7   8   9  21   9    7
  22  |   4   8   4   3   3   3   9   9    2 |    3   8   6   4   7   6  16   8    5
  23E |   7  20   7 ---  10   5  38   7    5 |   29  41  26 ---  26  31  38  27   28
  24  |   4   8   5   7   4   3  11   4    2 |    3   9   5   6   5   4  12   5    5
  25  |   5   8   5   3   4   3  12   7    2 |    6   7   5   7   7   6  13   9    6
  26  |   4   6   4   4   5   7  16  11    3 |    4   9   4   6   7   4  15  13    4
  27  |   2  11   4   3   5   3  16   4    2 |    4  12   4   5   5   5  13   6    6
  29  |   6   6   6   5   3   5  12   4    2 |    4   6   6   5   6   9  12   6    4
  30  |   4  13   4   8   6   3  13   8    3 |    3  11   6   5   7   7  12   8    5
  31  |   6   7   3   7   4   4  14   7    2 |    4   7   4   7   5   4  14   7    4
------|--------------------------------------|--------------------------------------
 RMS  |   5  11   5   6   5   4  19   7      |T   8  13   8   6   8   9  16   9    8
 WRMS |   4  11   5   6   5   4  21   6      |NE  3  10   4   5   6   5  14   7    5
 MEDI |   4   8   4   6   5   4  16   6      |MD  4  10   5   5   6   5  14   7    5

Table 3.0913.6   GPS week: 0913   Day: 6   MJD: 50641.0

               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   8   4   4   4   3  18   6    2 |    5  10   5   6   6   3  16   8    4
   2  |   5  11   4   3   7   3  23   7    3 |    7  13   8   7   9   9  15   7    6
   3  |   5  10   3   5   3   3  18   8    3 |    5  11   6   6   7   4  16  10    5
   4  |   3  10   5   3   6   3  16   5    2 |    4  11   4   6   6   4  16   8    5
   5  |   4  12   5   8   5   4  12  13    3 |    4   8   5   5   6   7  10  13    4
   6  |   5  20   3   6   6   4  22   7    3 |    3  19   4   5   8   4  19   6    5
   7  |   5   9   4   3   6   3  28   6    3 |    4  10   6   6   7   5  24   8    5
   9  |   3  11   4   4   3   4  13   6    2 |    5  10   4   6   5   6  11  10    5
  10E |   6  10   7   8   6   4  22  11    3 |   13  15  12  15  15  13  28  14   12
  14E |   4  13   5  10   6   6  19   6    3 |   12  18  15  11  16  14  22  16   13
  15  |   2   8   3   3   6   3  20   5    2 |    3   7   4   4   6   5  13   8    4
  16E |   4  11   7   7   8   4  15   5    3 |    7  12   5   6  11   7  20   7    6
  17  |   4   8   2   5   4   4  16   5    2 |    5  10   5   5   6   5  16   5    5
  18  |   4   9   5   5   5   3  10   6    2 |    4   8   8   5   7   7  15   7    4
  19  |   3   8   4   6   5   3  12   8    2 |    3   9   4   4   6   6  11  10    5
  21E |   5  18   4   3   7   3  23   7    3 |    6  17   6   8   9   7  18  11    6
  22  |   4  11   4   4   4   3  22   8    3 |    4  11   6   6   7   6  19  10    5
  23E |   5   9   6   5   5   4  16   7    3 |   40  32  37  36  36  39  30  38   36
  24  |   4   8   4   5   6   4  17   5    2 |    4   8   4   4   6   5  17   8    4
  25  |   3   9   7   5   5   4  16   5    2 |    6   8   7   7   6   6  19   9    6
  26  |   3  12   9   3   4   4  12   6    3 |    6  14   7   9  11   5  19  11    7
  27  |   3  11   3   3   4   3   8   5    2 |    5  13   6   6   7   7  10   7    5
  29  |   4   8   3   7   4   5  12   6    2 |    5   8   6   7   7   5  14   9    5
  30  |   3  16   4   4   5   5  12   5    3 |    4  13   5   5   8   7  11   7    4
  31  |   5   6   4   6   6   3  17   6    2 |    5   8   6   9   7   4  15   7    5
------|--------------------------------------|--------------------------------------
 RMS  |   4  11   5   5   5   4  17   7      |T   9  13   9   9  10  10  17  11    9
 WRMS |   4  11   5   5   5   4  18   6      |NE  4  10   5   6   7   5  15   8    4
 MEDI |   4  10   4   5   5   4  16   6      |MD  5  11   6   6   7   6  16   8    5

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 4.0913   GPS week: 0913   MJD: 50635.0-50641.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2393 |U  58   26   88 |U  39   26   87 |   23   14   43 |
emr | emr 2268 |   63   27   87 |   40   31   92 |U  23   14   46 |
esa | esa 2206 |   48   30   86 |U  49   30   94 |   28   21   60 |
gfz | gfz 1166 |   66   26   84 |U  44   29   87 |   26   19   53 |
igr | igr 2397 |   57   26   86 |   39   28   89 |   23   15   49 |
igs | igs 2400 |   57   26   85 |   38   27   87 |   24   14   46 |
jpl | jpl 2378 |   57   26   86 |U  38   26   88 |   23   15   46 |

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 5.0913.0   GPS week: 0913   Day: 0   MJD: 50635.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2393 |   74   25  102 |   46   22   81 |   23   16   45 |
emr | emr 2301 |   77   25  105 |   43   26   76 |   22   18   48 |
esa | esa 2298 |   46   31   66 |   50   28   86 |   27   23   68 |
gfz | gfz 1187 |   99   28  131 |   56   25   83 |   23   24   61 |
igr | igr 2399 |   73   26   99 |   45   23   80 |   23   18   52 |
igs | igs 2400 |   75   25   97 |   46   23   78 |   23   17   52 |
jpl | jpl 2377 |   72   24   99 |   44   23   78 |   23   18   49 |

Table 5.0913.1   GPS week: 0913   Day: 1   MJD: 50636.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2386 |   82   25   90 |   34   35  103 |   23   13   45 |
emr | emr 2108 |   93   28   82 |   37   40  113 |   22   13   51 |
esa | esa 2009 |   75   42  143 |   40   37  115 |   32   22   64 |
gfz | gfz 1138 |  107   27   86 |   62   33  104 |   28   19   50 |
igr | igr 2400 |   82   24   89 |   33   37  104 |   25   13   52 |
igs | igs 2400 |   80   25   92 |   35   35  103 |   24   14   47 |
jpl | jpl 2377 |   82   25   89 |   34   35  103 |   25   14   50 |

Table 5.0913.2   GPS week: 0913   Day: 2   MJD: 50637.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2397 |   65   33  108 |   44   24   94 |   23   15   46 |
emr | emr 2107 |   74   36  118 |   46   28   98 |   26   14   46 |
esa | esa 2170 |   43   27   72 |   64   25   98 |   25   23   63 |
gfz | gfz 1151 |   30   31   76 |   43   27   85 |   27   21   56 |
igr | igr 2400 |   64   34  110 |   42   23   95 |   25   16   56 |
igs | igs 2400 |   63   33  106 |   40   23   95 |   24   15   49 |
jpl | jpl 2377 |   63   33  109 |   42   24   95 |   24   15   47 |

Table 5.0913.3   GPS week: 0913   Day: 3   MJD: 50638.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2394 |   40   25   76 |   44   25   84 |   25   17   38 |
emr | emr 2399 |   39   23   72 |   44   26   90 |   25   15   38 |
esa | esa 2195 |   40   27   76 |   54   31   90 |   30   23   56 |
gfz | gfz 1182 |   43   19   64 |   33   21   75 |   27   23   42 |
igr | igr 2400 |   41   23   74 |   47   26   86 |   24   18   42 |
igs | igs 2400 |   39   23   73 |   43   26   83 |   25   16   41 |
jpl | jpl 2380 |   41   24   73 |   44   25   84 |   23   17   41 |

Table 5.0913.4   GPS week: 0913   Day: 4   MJD: 50639.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2398 |   33   24   75 |   35   27   82 |   24   14   40 |
emr | emr 2274 |   38   25   66 |   34   30   90 |   24   15   45 |
esa | esa 2223 |   37   26   69 |   44   28   89 |   31   21   52 |
gfz | gfz 1182 |   36   26   70 |   23   30   83 |   28   14   46 |
igr | igr 2390 |   33   26   74 |   35   28   85 |   23   13   43 |
igs | igs 2400 |   33   24   72 |   35   27   83 |   24   13   41 |
jpl | jpl 2379 |   32   24   73 |   35   27   82 |   23   13   42 |

Table 5.0913.5   GPS week: 0913   Day: 5   MJD: 50640.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2385 |    0    0    0 |   31   27   88 |   20   13   44 |
emr | emr 2289 |    0    0    0 |   40   35   91 |   21   14   46 |
esa | esa 2238 |    0    0    0 |   46   27   96 |   23   20   55 |
gfz | gfz 1135 |    0    0    0 |   36   39   88 |   24   15   65 |
igr | igr 2392 |    0    0    0 |   33   28   91 |   21   13   52 |
igs | igs 2400 |    0    0    0 |   30   27   88 |   21   13   48 |
jpl | jpl 2377 |    0    0    0 |   31   26   89 |   21   13   48 |

Table 5.0913.6   GPS week: 0913   Day: 6   MJD: 50641.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   33   22   68 |   35   23   75 |   24   11   42 |
emr | emr 2395 |   33   24   65 |   32   26   80 |   23   10   44 |
esa | esa 2308 |   32   22   59 |   43   27   82 |   27   14   56 |
gfz | gfz 1187 |   33   22   56 |   40   23   85 |   24   16   48 |
igr | igr 2398 |   28   23   60 |   34   24   79 |   23   12   44 |
igs | igs 2400 |   30   22   61 |   33   23   76 |   24   11   43 |
jpl | jpl 2379 |   34   24   67 |   35   23   79 |   25   10   44 |

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