Subject: [IGSREPORT-2650] Wk 0851 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 14 May 1996 7:14:24 PDT

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IGS Electronic Report    Tue May 14  7:14:24 PDT 1996      Message Number 2650
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0851 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0851   (Apr 28, 1996 - May 04, 1996)

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 (IGS08517.SUM).

SOFTWARE:

  The weighted average software used was developed by T. Springer and
G. Beutler during 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, Kouba, Springer, 1993, Combining orbits of the IGS processing
   centres, in IGS Analysis Centre Workshop, October 12-14, Ottawa, pp 19-55.

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 are computed using a weighted average of all available centres 
(weights are those from the orbit combination). These values are supplemented 
with the current IERS Bulletin A UT1-UTC values. 

  The Rapid Service Orbit files generated and uploaded into CDDIS @ NASA/GSFC
are:

 IGS08510-6.SP3  IGS GPS ephemeris files for days 0-6, week 0851 in SP3 format.
 IGS08517.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08517.SUM    Complete report.

REMARKS on IGS Rapid Service 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. Starting with GPS week 0837, the igp orbits/clocks ("igp" standing for igs 
   preliminary combination) are now included in the rapid combination for 
   statitics only.  Note that the "igp" daily combination is performed on a 
   daily basis within 38 hours of last observation.

4. Centre clock weights were determined using the following non-SA satellites:
   PRN15 and PRN28.
   Higher clock RMS for NGS on days 1-2 (Apr 29-30) were caused by PRN24 which
   was unhealthy from 20:07 until 23:12 on day 1 (ref. NANU 087-96120).

5. State vector resets were modeled for the following satellites to
   alleviate the effects of modelling problems, experienced by all centres,
   in the long arc process:

          Day (Date) |   TIME   | PRN | Centres  | Reason
         ------------+----------+-----+-------------------------------------
          3 (May 01) | 00:00:00 | 09  |   ALL    | Modeling problems    
          3 (May 01) | 00:00:00 | 25  |   ALL    | Modeling problems
          4 (May 02) | 00:00:00 | 16  |   ALL    | Modeling problems

6. Centre specific UT1-UTC values for ESA and NGS were not used in the long arc 
   evaluation. Smaller RMS were obtained when UT1-UTC values from Bulletin A
   were used.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08517.SUM).

Table 1: Week 0851 summary.                       (Apr 28, 1996 - May 04, 1996)

Table 1.0851.a   GPS week: 0851   MJD: 50201.0-50207.0

         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  69 | .00  .01  .01  -.32   .06  -.14   .0  .06  .05 |   -6.3    1.9    1.6
        | .00  .00  .00   .06   .10   .13   .1           |    7.4   13.2
emr  29 | .00 -.01 -.01   .55  -.15   .33  -.1  .11  .11 | 2372.9   28.0     .8
        | .00  .01  .01   .08   .12   .17   .1           |   67.2    7.4
esa  53 | .00 -.01  .00  -.22   .13   .17   .1  .11  .09 |   15.0    7.5    4.5
        | .00  .00  .01   .10   .07   .11   .1           |   21.9   13.7
gfz  48 | .01 -.02  .00   .06   .13  -.27  -.1  .08  .07 | 2374.2   28.3     .6
        | .01  .00  .00   .09   .07   .11   .1           |   67.1    7.5
igp  n/a| .00  .00  .00   .31  -.07   .10  -.1  .09  .08 |    -.1    -.2     .9
        | .01  .01  .01   .16   .14   .18   .2           |    1.1    1.9
jpl  37 | .00  .02  .01  -.03   .05   .20   .1  .07  .07 | 2373.7   28.6     .7
        | .00  .01  .00   .12   .04   .08   .1           |   67.1    7.5
ngs  46 | .00 -.05 -.01  -.40  -.16   .11  -.1  .14  .14 |   -8.0   10.8   97.0
        | .01  .01  .01   .23   .22   .28   .1           |    9.6   16.2
sio  112|-.01  .02 -.01   .35  -.23  -.17   .0  .07  .07 |     .0     .0     .0
        | .00  .01  .00   .09   .06   .26   .1           |     .0     .0

Table 1.0851.b   GPS week : 0851   MJD: 50201.0-50207.0

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

              Day of GPS week
 PRN  |   0   1   2   3   4   5   6 |  Remarks
------|-----------------------------|------------------------------------------
   1  |   3   3   3   3   3   3   3 |
   2  |   3   3   3   3   3   3   3 |
   3  |   4   4   3   4   3   4   4 |
   4  |   3   3   3   4   3   3   3 |
   5  |   3   2   2   3   2   3   3 |
   6  |   3   3   3   3   3   4   3 |
   7  |   3   3   3   4   3   3   3 |
   9E |   3   4   4   4   4   4   4 |
  14  |   3   3   3   3   3   3   3 |
  15  |   4   3   3   3   3   3   3 |
  16  |   3   3   3   4   5   3   4 |
  17  |   3   4   3   5   4   4   4 |
  18  |   3   3   3   3   3   3   3 |
  19E |   5   5   5   5   5   4   5 |
  20  |   2   2   2   3   3   3   3 |
  21  |   2   3   3   3   3   3   3 |
  22  |   2   3   3   3   3   3   3 |
  23  |   3   4   3   3   3   3   4 |
  24  |   3   3   3   4   3   3   3 |
  25E |   4   4   4   4   4   4   4 |
  26  |   4   3   4   4   4   3   3 |
  27E |   4   4   4   5   6   5   5 |
  28  |   2   3   2   3   3   3   3 |
  29  |   3   2   2   3   2   3   2 |
  31  |   3   3   3   3   3   3   3 |

Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
         Units: meters, mas, ppb, nano-sec, nano-sec/day.

Table 2.0851.0   GPS week: 0851   Day: 0   MJD: 50201.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .00  .02  .01  -.37  -.10  -.15   .1  .05  .05 |   -1.3   -2.1    2.0
emr  29 | .00 -.01 -.01   .52   .05   .55  -.1  .10  .10 | 2280.7   25.4     .9
esa  55 | .00 -.01  .01  -.10   .13   .01   .1  .11  .10 |   12.7   -4.1    2.6
gfz  47 | .00 -.02  .00   .16   .13  -.15  -.1  .06  .06 | 2282.4   25.8     .7
igp  n/a|-.01 -.03  .00   .17  -.16  -.12  -.1  .07  .07 |    1.2   -1.9    1.1
jpl  37 | .00  .01  .00  -.11   .01   .19   .2  .06  .06 | 2281.6   26.1     .9
ngs  43 | .01 -.03 -.01  -.36  -.03  -.22   .0  .16  .15 |   -7.5   12.9   78.8
sio  110|-.01  .03 -.01   .21  -.24  -.25   .0  .07  .07 |     .0     .0     .0

Table 2.0851.1   GPS week: 0851   Day: 1   MJD: 50202.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 | .00  .02  .01  -.19   .00  -.04   .1  .06  .05 |   -7.5    5.7    1.6
emr  30 |-.01 -.01 -.01   .61  -.02   .40  -.2  .09  .09 | 2309.7   31.3     .7
esa  53 | .00 -.01  .01  -.13   .11   .07   .2  .11  .09 |   29.1    7.9    1.9
gfz  48 | .00 -.02  .00   .08   .17  -.25  -.1  .07  .07 | 2310.6   31.5     .6
igp  n/a| .00 -.01  .00   .17  -.01  -.06  -.2  .05  .05 |     .0    -.2     .8
jpl  37 | .00  .01  .01  -.24   .02   .05   .2  .06  .06 | 2310.6   32.0     .7
ngs  45 | .00 -.04  .00  -.57  -.18   .01  -.1  .14  .14 |  -17.1   22.1  109.4
sio  113|-.01  .02 -.01   .26  -.25  -.13  -.1  .07  .07 |     .0     .0     .0

Table 2.0851.2   GPS week: 0851   Day: 2   MJD: 50203.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 |-.01  .01  .01  -.31   .03   .08   .1  .06  .05 |  -20.5   22.6    1.4
emr  29 | .00  .00 -.02   .55  -.14   .21  -.2  .10  .10 | 2336.3   36.0     .7
esa  53 | .01 -.01  .00  -.36   .16   .19   .1  .12  .10 |   53.1    7.7    1.5
gfz  49 | .01 -.02  .00   .11   .22  -.17  -.3  .06  .06 | 2337.6   36.3     .6
igp  n/a| .00  .02  .00   .40   .03   .34  -.4  .11  .09 |   -1.4    -.3     .8
jpl  37 | .01  .02  .01  -.05   .07   .25   .1  .06  .06 | 2337.2   36.5     .7
ngs  46 |-.01 -.04  .00  -.42  -.18  -.08   .0  .15  .15 |  -23.6   37.5  151.0
sio  113|-.01  .02 -.01   .40  -.31  -.67   .0  .08  .08 |     .0     .0     .0

Table 2.0851.3   GPS week: 0851   Day: 3   MJD: 50204.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  71 | .00  .02  .00  -.35   .01  -.12   .1  .06  .05 |    3.5  -18.0    1.5
emr  28 |-.01  .00  .00   .63  -.26   .16  -.1  .10  .10 | 2381.7   16.4     .8
esa  52 | .00 -.01  .00  -.29   .19   .33   .2  .12  .10 |  -16.4    2.0    3.1
gfz  49 | .00 -.02  .00  -.06   .04  -.35  -.1  .08  .08 | 2383.4   16.3     .7
igp  n/a| .01  .00  .00   .46   .07   .21  -.1  .08  .07 |    -.1    -.1     .9
jpl  37 | .00  .00  .02   .10   .10   .18   .1  .08  .08 | 2382.4   16.9     .8
ngs  45 | .01 -.05  .00  -.70   .26   .53   .1  .14  .15 |    3.4   -9.9   78.1
sio  110|-.01  .02 -.01   .35  -.18  -.12  -.1  .08  .08 |     .0     .0     .0

Table 2.0851.4   GPS week: 0851   Day: 4   MJD: 50205.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .01  -.35   .19  -.20   .0  .06  .05 |   -3.7   -9.2    1.3
emr  30 | .00  .00 -.02   .38  -.22   .17  -.1  .13  .13 | 2403.1   20.8     .6
esa  53 | .00 -.01  .00  -.27   .10   .19   .2  .12  .08 |   11.6   -8.1   10.5
gfz  49 | .00 -.01  .00   .11   .07  -.20  -.1  .08  .08 | 2403.8   20.9     .5
igp  n/a| .01  .00 -.01   .22   .00   .22  -.3  .07  .06 |    1.2   -2.7     .7
jpl  37 | .00  .01  .01   .00   .04   .16   .1  .06  .06 | 2403.9   21.2     .5
ngs  46 | .00 -.05 -.02  -.20  -.28   .46  -.3  .14  .14 |     .3   -5.7   78.2
sio  113|-.01  .01 -.01   .33  -.13  -.18   .0  .06  .06 |     .0     .0     .0

Table 2.0851.5   GPS week: 0851   Day: 5   MJD: 50206.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  70 | .00  .01  .01  -.34   .13  -.29   .0  .06  .05 |   -7.2    4.1    1.5
emr  30 |-.01  .00  .00   .54  -.26   .28  -.1  .10  .09 | 2431.9   35.5     .7
esa  54 | .00 -.01  .00  -.26   .00   .29   .0  .10  .09 |   15.3   13.3    1.8
gfz  49 | .02 -.03  .00   .09   .21  -.36  -.1  .08  .07 | 2433.8   35.6     .6
igp  n/a| .01  .01 -.02   .55  -.14   .17   .3  .09  .08 |   -1.7    3.1     .8
jpl  37 | .01  .03  .01   .01   .10   .23   .1  .07  .07 | 2432.9   36.3     .6
ngs  48 | .01 -.05 -.01  -.02  -.36   .00  -.3  .14  .14 |   -8.8   12.7   81.3
sio  116|-.02  .01 -.01   .37  -.25   .15   .1  .08  .08 |     .0     .0     .0

Table 2.0851.6   GPS week: 0851   Day: 6   MJD: 50207.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  71 | .00  .01  .02  -.31   .14  -.27  -.1  .05  .04 |   -7.1    9.9    1.6
emr  28 |-.01 -.01 -.01   .59  -.19   .55   .0  .12  .12 | 2466.6   30.6     .9
esa  54 | .00  .00 -.01  -.12   .22   .12  -.2  .12  .10 |    -.1   33.7    2.5
gfz  45 | .02 -.02  .00  -.07   .10  -.42  -.1  .09  .09 | 2467.5   31.4     .8
igp  n/a| .01  .00 -.01   .20  -.33  -.08  -.1  .12  .10 |    -.1     .6    1.0
jpl  37 | .00  .02  .00   .09   .03   .30   .1  .06  .06 | 2467.2   31.3     .9
ngs  50 | .01 -.05 -.01  -.53  -.38   .08  -.1  .13  .13 |   -2.5    5.9   78.1
sio  112|-.01  .02 -.01   .50  -.27   .01   .0  .07  .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 (all satellites).
         "NE" stands for Non-Eclipsing satellites long arc orbit RMS.

         Units: cm.

Table 3.0851.0   GPS week: 0851   Day: 0   MJD: 50201.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4   9   9   8   6   6   8   7    3 |    4   8  11   7   9   4  12   7    5
   2  |   6   9  12   5   7   6  10   7    3 |    8  10  14  10  10   6  11   6    8
   3  |   4  12  18   6  12   9  16   8    4 |   15  16  18  18  18  17  20  15   15
   4  |   4   8   7   6   9   4  20   7    3 |    3   9   9   7   8   4  17   7    6
   5  |   5   5   9   5   6   4  13   6    3 |    5   6   6   8   8   4  11   7    4
   6  |   4   8  10   6   8   4  16   8    3 |    4   8   6   6   6   4  12   7    4
   7  |   2   7  14   6   7   4  15   6    3 |    3   6   9   8   9   5  12   6    4
   9E |   5  12  11   6   8   6  16   7    3 |    6  10  12   9   8   4  16   7    6
  14  |   6   7   7   5   5   6  11  10    3 |    8   7   7   9   8   7  11   8    6
  15  |   4  11   7   7   7   8  18  11    4 |    8  10  11  10  11   7  15  11    9
  16  |   4  14  11   6   4   4 ---   7    3 |    6  13   7   4   8   5 ---   5    5
  17  |   7  13   8   5   7   6  18   6    3 |    6   9   9   9  10   5  15   4    6
  18  |   6   7  10   7   4   6  13   6    3 |    6  12  12  11  10   5  13   9    7
  19E |   8  10  18   9   5  15  21  11    5 |   28  29  31  33  29  22  40  25   27
  20  |   4  11   6   6   5   3   7   5    2 |    4   8   9   6   8   4   9   4    5
  21  |   3  11   7   4   5   4   7   7    2 |    5   9  11   7   7   6  13   5    6
  22  |   4   8   9   5   4   4  11   6    2 |    3  12  10   9  10   6  13   4    6
  23  |   7  10   7   5   5   6  21   7    3 |    7  10  14   8   8   9  20  12    9
  24  |   5  11   6   7   8   5  18   6    3 |    5  14   9   8   8   6  18   8    6
  25E |   9  12  12   8   9   8  16   9    4 |    7  17  13  13   8   4  19   6    8
  26  |   8  10  13   4   6   4  21   8    4 |    6  11  16   7   8   5  19   9    7
  27E |   8   8  13   7   6   8  18   8    4 |   14  12  14  15  12  13  16   9   11
  28  |   4   7   9   4   7   5  11   5    2 |    3   9   9   8   7   6  13   2    5
  29  |   5   7  12   6   6   7  11   6    3 |   11  11  20  10  13   9  14  14   11
  31  |   5   7  14   4   5   7  21   7    3 |    6  10  12   8   8   7  14   5    5
------|--------------------------------------|--------------------------------------
 RMS  |   5  10  11   6   7   6  16   7      |T   8  11  13  11  10   8  16   9    8
 WRMS |   5  10  10   6   7   6  15   7      |NE  6  10  11   8   9   6  14   8    7

Table 3.0851.1   GPS week: 0851   Day: 1   MJD: 50202.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4   9  12   7   4   6   9   6    3 |    4   7  10   8   8   4   9   7    4
   2  |   7   7   9   8   4   5  13   5    3 |    7  11  12  16  10  10  15  11   10
   3  |   6  10  14   5   4   9  13  10    4 |    9  12  14  12  12  11  16  14   10
   4  |   5   6   9   9   2   5  13   5    3 |    3  10  11   7   8   4  15   5    5
   5  |   4   7   6   5   5   5   9   5    2 |    4   7   6   9   8   5  12   5    5
   6  |   4   7   8   8   4   5  19   5    3 |    4   7   8   6   5   3  14   8    4
   7  |   4   7  12   7   3   5  13   5    3 |    4   9   8   8   6   4  13   5    3
   9E |   7  11  15   8   9   8  12   5    4 |    6  14  15  11  12   6  16   7    8
  14  |   5   8   6   7   8   4  12   8    3 |    5   8   7   7   7   5   8   7    4
  15  |   5  10   9   6  10   6  11   7    3 |    9  11  13  10  10   8  16  11    8
  16  |   7  10  11   6   3   4  12   9    3 |    5   8   6   6   9   3  13   7    4
  17  |  10  12   8  11   4   9  17   6    4 |    5   9   8   9   8   6  15   6    5
  18  |   5   9  14   6   4   4   8   7    3 |    5  11  13   9   6   6  10   7    6
  19E |   9   9  15   6   5  11  18  15    5 |   23  22  24  23  24  20  32  20   21
  20  |   4   7   6   5   5   4   9   5    2 |    6   8   6   7   7   6  11   4    5
  21  |   3  12   9   6   5   5  10   9    3 |    3   7  10   6   5   5  10   7    3
  22  |   4   6  10   7   4   4  12   6    3 |    3  10   9  11   7   5  12   4    5
  23  |   8  15   8   4   5   7  20  10    4 |    5  12  10   9   6   5  17  11    7
  24  |   3   8   8   7   4   6  19   6    3 |    3   9   8   5   8   4  20   5    3
  25E |   9  14  17   9   4   8  17   8    4 |    7  18  29  12   8   4  19   4    8
  26  |   7   5  11   5   7   6  15   8    3 |    6   8  12   9  11   5  15   8    6
  27E |  11   5  10   6   7   8  19  10    4 |   15  13  14  14  10   9  23  11   11
  28  |   5   7   8   6   3   6  13   5    3 |    4  10  10   9   7   4  12   4    5
  29  |   4   9   9   5   5   3  10   5    2 |    7  11  10   8   8   6  13  11    7
  31  |   3  11  17   4   4   4   8   7    3 |    5   8  12   9   8   5  14   6    5
------|--------------------------------------|--------------------------------------
 RMS  |   6   9  11   7   5   6  14   7      |T   7  10  12  10   9   7  15   8    7
 WRMS |   5   9   9   7   5   6  14   7      |NE  5   9   9   8   8   5  13   7    5

Table 3.0851.2   GPS week: 0851   Day: 2   MJD: 50203.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   6   7  11   7   6   6   8   7    3 |    5   7   9   7   6   5  12   5    4
   2  |   5   6   8   6  12   5  18  11    3 |    8   7   9   9  10   8  21  15    8
   3  |   6   9  15   5  21   6  12   7    3 |   12  14  16  18  17  15  19  14   14
   4  |   6   6  10   8   8   5  13   7    3 |    3   8  11   7   7   4  15  10    4
   5  |   4   7   7   4   6   3   9   9    2 |    4   8   8   7   9   4  10   4    4
   6  |   3   7  10   5   5   4  17   7    3 |    4   6   8   8   6   4  19   8    3
   7  |   4  14   8   6   8   5  13   6    3 |    6   8  10   8   6   5  13   5    4
   9E |   4   9  22   5   6   6  14   5    4 |    5  11  19  12   7   6  16  10    8
  14  |   4   8   8   4   6   4  13  10    3 |    6   8   6   7   9   6   9   7    5
  15  |   5  11  10   6   5   6  12   7    3 |    7  12  13  10  13   8  11   6    8
  16  |   9  13  10   5  28   4  16   7    3 |    9  12   8   7  22   5  16   7    4
  17  |   5  12   9   7   8   8  17   8    3 |    5  11   9  12   9   4  17  10    6
  18  |   4   8  11   5   6   5  13   6    3 |    5   9   8   8   7   7  12   8    6
  19E |   7   9  19   6   8   9  25  12    5 |   19  22  30  23  20  17  38  20   20
  20  |   4   6   7   4   5   4  10   4    2 |    4   8   8   7   8   6  11   6    4
  21  |   3  12   7   4   6   4   9   8    3 |    5   7   9   7   7   6  12   9    5
  22  |   5   8  15   5  15   5  13   8    3 |    3  13  11  11  13   8  13   6    6
  23  |   8  10  10   6  11   5  17   6    3 |    5   9  10  12   6  11  20  12    8
  24  |   4   8   9   7   9   4  20  10    3 |    3  10  10   7  10   4  20   9    4
  25E |   6  16  15   8   9   7  19   7    4 |    9  18  18  12  10   5  21   6    9
  26  |   9  17  12   5  10   6  19   8    4 |    7  20  10   7  12   4  18   4    4
  27E |  11  10  14   6  10   9  18  12    4 |   11  12  16  12  10   9  16   6    8
  28  |   5   6  10   5  13   4  11   5    2 |    3   7  10   8  11   7  12   4    5
  29  |   4   8   8   4  11   5   9   5    2 |    4   9   8   6   9   6  14   6    5
  31  |   5   8  12   6  12   5   8   6    3 |    4  10  10   8   7   7  11   4    5
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  12   6  11   6  15   8      |T   7  11  12  10  10   7  16   8    7
 WRMS |   5  10  10   6   9   6  15   8      |NE  5  10   9   9  10   6  14   8    6

Table 3.0851.3   GPS week: 0851   Day: 3   MJD: 50204.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4   9   8   9   6   8  10   6    3 |    5  11   6  10   8   6  11   6    6
   2  |   8  10  13   5   5   6  15   5    3 |    8  14  16  13  11   8  18   9    9
   3  |   5  11  15   7   8  11  14   7    4 |   14  14  16  18  13  19  21  13   14
   4  |   3   7  13   9   6  10  17   8    4 |    4   9  15  10   9   8  17  10    5
   5  |   5   7   6   7   6   5  12   7    3 |    4   9   8   8   6   6  14   8    4
   6  |   5   7  12   6   4   7  19   7    3 |    5   7  10   9   4   9  15   5    3
   7  |   5  12  12   6   5   9  11  12    4 |    5   8  12  13   7   7   9  10    4
   9E |   4  15  24   5  14   6  16   7    4 |   10  14  20  17  17  12  21  12   12
  14  |   5   8   6   6   8   5  11   9    3 |    7   7   6   8  11   5   9   7    5
  15  |   6   9   7  12  11   7   8   6    3 |   16  18  17  22  24  17  17  18   18
  16  |   7   8 ---   9  10  14  14   8    4 |    7   8 ---  10  13  16  17   9    6
  17  |   9  13  13  16   7  14  21   6    5 |    5  14  10  15   6   9  14   7    7
  18  |   3  11  10   6   5   5   9   8    3 |    5  11  10   8   6   7  11   7    5
  19E |  14  11  16  13  13   9  21  11    5 |   17  21  19  21  21  17  27  20   17
  20  |   3  10   7   5   5   5  11   6    3 |    4   8   7   9   4   5  11   7    4
  21  |   5   8   6   4   4   6  10   7    3 |    5   8   8  10   7   7  13   6    5
  22  |   4   7   9  11   5   6  13   9    3 |    6  11   9  11   9  10  10   5    6
  23  |   6  11   7   7   6   8  16   5    3 |    6  14  10  14   7   9  14   9    7
  24  |   4   8  16   7   6   6  23   8    4 |    5  10  19   8  11   7  25   9    6
  25E |   5  16  12   8   5   7  14   7    4 |   10  14  16  14  13   7  20   7   10
  26  |   5   9  18   5   7   8  14   7    4 |    5   9  22   8  10   9  15   5    6
  27E |  14  13  18   9  12  10  17  11    5 |   14  14  18  15  13  11  20  10   11
  28  |   5   8   9   9   6   8  11   6    3 |    4   9  10  10   7   8  14   5    5
  29  |   4   7  10   7   5   5  11   5    3 |    6   7  10  10   9   5  12   6    5
  31  |   4   8  10   5   8   6   8   7    3 |    7   9  10  10   7   6  14   4    6
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  12   8   8   8  14   8      |T   8  11  13  12  11  10  16   9    8
 WRMS |   5  10  10   8   7   8  15   8      |NE  7  10  12  11   9   9  14   8    7

Table 3.0851.4   GPS week: 0851   Day: 4   MJD: 50205.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4  15   6  12   4   6  10   7    3 |    5  14   9   7   7   5  10   6    5
   2  |   5   7   8   5   5   4  19   5    3 |    7  14  11  12  13   9  16  10    9
   3  |   6  13  11   7   9   8  12   7    3 |   12  14  15  14  13  14  17  11   11
   4  |   3  15  11   9   5   7  13   4    3 |    5  15  12   8   7   4  14   6    4
   5  |   5   9   7   5   5   4  10   5    2 |    4  10   6   7   6   4  11   6    4
   6  |   6   9   9   8   7   5  18   5    3 |    6  12   8  13  14  10  18  12    8
   7  |   4  12   6  10   8   7  17   4    3 |    3   9   9   8  11   6  20   3    4
   9E |   4  18  12  11   4   6  16   5    4 |   14  23  16  18  18  15  18  16   15
  14  |   6  12   6   5   3   4   9   8    3 |    6   8   7   9   5   4  10   8    4
  15  |   6  10  10   8   7   7  14   6    3 |   10  11  12  11   9   8  14  12    9
  16  |   9  12  31   8  11   8  11   8    5 |    4   9  17  10   6   4  10   9    6
  17  |   9  16   7  13   7   8  14   5    4 |    5  11  10  12  12   8  12   7    6
  18  |   5  12   7   6   4   7  11   7    3 |    5  13  10   7   9   8  14   9    6
  19E |   9  14  14   8  12   8  22  11    5 |   17  16  16  18  22  15  30  19   17
  20  |   3  14   7   7   4   4   8   5    3 |    5  10   5   8   6   5  11   5    4
  21  |   3  13   8   5   7   5   8   7    3 |    5  11   9   6   8   6  12   6    4
  22  |   4  13   8  11   5   5  11   7    3 |    5  16   8  10   7   7  13   5    5
  23  |   6  10   6   6   6   7  16   5    3 |    7  15  10  13  10   8  16  11    8
  24  |   4   9  15   6   3   6  12   6    3 |    6  10  10   8   7   5  15   7    5
  25E |   6  19  13  11   7   7  18   8    4 |    7  14  12  11   8   5  16   5    5
  26  |   6  14  18   5   5   9  12   7    4 |    5  17  16   9   9   6  13   6    5
  27E |  17  22  14  11   7   7  24   8    6 |   15  21  18  13  10  10  25   9   10
  28  |   5   8   8   7   4   6  11   5    3 |    4  12  12   8  10   5  16   4    5
  29  |   4   8   6   6   5   6  10   4    2 |    5  10   7  10   9   6  13  10    6
  31  |   3   9   9   6  10   5   8   7    3 |    6  11   9   9  10   6  11   5    5
------|--------------------------------------|--------------------------------------
 RMS  |   6  13  12   8   7   6  14   6      |T   7  13  11  10  10   8  15   9    7
 WRMS |   5  13   8   8   6   6  14   6      |NE  6  12  10   9   9   6  13   7    6

Table 3.0851.5   GPS week: 0851   Day: 5   MJD: 50206.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   3  10   9  10   4   7  10   9    3 |    4  11   8   9   8   5  13   6    5
   2  |   6   8   8   7   4   5  14   6    3 |    9  10  13  12  12   8  15  10   10
   3  |   6   8  14   8   6   9  12   8    4 |   11  13  16  17  12  13  15  10   11
   4  |   2   8  10   8   5   6  14   7    3 |    3   7  12   8   7   5  14   6    4
   5  |   4   6   9   6   7   3  13  11    3 |    3   8   8   8   8   4  12   7    4
   6  |   3  14  10   6  13   5  16  18    4 |    4  12   7  11  10   8  13  13    6
   7  |   4   9   6   9  16   6  12   6    3 |    5   7   9   8  13   5  11   5    4
   9E |   6  11  18   5   7   8  15   6    4 |   10  12  21  14  14  11  17   9   11
  14  |   4   9   7   5   6   6   9   8    3 |    5   9   7   8   9   4  12   8    5
  15  |   4  11  10   6  12   7  12   6    3 |   11  15  17  14  16  11  14  14   11
  16  |   5  10   8   8   7   6  11   8    3 |    5   7  12   6   5   5  12   5    4
  17  |   7  17   8  12   7   8  13   7    4 |    7  14   8  17  12   8  15   8    9
  18  |   6   8   9   6   8   6  16   7    3 |    5  10   9   9   8   6  16   9    6
  19E |   7   9  11   8  13   8  21   6    4 |   21  21  23  24  21  18  31  19   20
  20  |   3   6   8   5   7   4  13   8    3 |    4   6   8   8   6   4  14   6    4
  21  |   4   9   6   6   8   7   8   6    3 |    5  10  10  11   9  10  13   4    7
  22  |   4   7   6   9   5   5  14   8    3 |    4   9   8   8  12   6  14   4    5
  23  |   7  11   6   8   8   5  15   6    3 |    5  12   9  13   7   7   9   7    7
  24  |   2   8   7   7   7   7  13   7    3 |    3  10  11   6   7   6  16   8    3
  25E |   8  14  13  10  10   8  18   9    4 |   10  15  14  13   9   6  19   7    8
  26  |   5   8  10   7   6   7  17   8    3 |    4   8  11   9   9   5  18   5    5
  27E |  13   9  10   8  12   8  22  10    5 |   14  13  14  12  15  11  20  10   11
  28  |   4   7   7   8   4   7  14   5    3 |    5   8  10   9   9   6  12   5    5
  29  |   5   9   9   7  11   6   8   5    3 |    6   9   8  10  11   6  14   8    6
  31  |   4   8  13   6  10   5  14   7    3 |    6   7  15   9  12   6  11   6    5
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  10   8   9   7  14   8      |T   7  11  12  11  11   8  15   8    7
 WRMS |   5   9   9   7   8   7  14   8      |NE  5   9  10  10   9   6  13   7    6

Table 3.0851.6   GPS week: 0851   Day: 6   MJD: 50207.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4  12  12   9   6   6  11   7    3 |    4  12  11   8  11   7  11   5    7
   2  |   4  15   7   5   9   5  14   7    3 |    8  11  10   8  13   7  10   6    7
   3  |   6  13  14   9  22  10  14   8    4 |   14  17  17  19  18  15  22  15   14
   4  |   3  10  12   9   6   5  14   8    3 |    6   9  12  12  11   6  13   9    6
   5  |   5   8   9   7   8   6  10   5    3 |    4  11   9   8   9   5  11   4    5
   6  |   3   7  10  10   8   3  11   7    3 |    4   8  10   7  10   6  12   6    6
   7  |   3   9   9  10  10   7   8  10    3 |    4   8  10  10  14   8  13   6    6
   9E |   4  12  15   5   8   7  19   4    4 |   11  14  18  13  13  12  17  10   12
  14  |   4  14   9   5   8   5   8   8    3 |    9  10   7  11  11   7  11   7    7
  15  |   4  20  14   6  14   5  10   6    3 |   11  12  19  13  18  12  14  12   13
  16  |   3  13  23  12  15   6  12   9    4 |    7  14  10   9  11   9   9   8    6
  17  |   6  18  13  12   6   8  16   4    4 |    7  15  11  12  10   7  12   7    7
  18  |   5  14  10   6  11   6   9   7    3 |    6  12  11  11  11   7  15   8    7
  19E |   7  12  19  17  15   7  19   7    5 |   26  32  28  32  34  28  35  31   29
  20  |   4   9   8   6   7   4  11   7    3 |    5   9   8   7   7   3  10   4    4
  21  |   3  13  11   7   7   5   8   8    3 |    7  11  11  11  10   8  13   5    6
  22  |   2   8   8  10  22   5  12   8    3 |    4   9  10   8  14   6  15   4    6
  23  |   6  11   8  10   6   8  15   7    4 |    7  13  10  15  11  10  13  11    8
  24  |   3  12  10   7   9   6  19   7    3 |    5  13  11   8  12   6  18   8    6
  25E |   7  14  14   9  24   7  23   6    4 |   10  13  16  11  15   6  16   5    9
  26  |   4  13  10   6   9   8  13   6    3 |    4  13  15   9  13   6  13   6    5
  27E |  11   8  16  16  10   6  15   7    5 |   14  16  14  18  17  12  20  11   13
  28  |   3  11   9  10  21   5  11   6    3 |    4  10  12   7  12   6  14   4    6
  29  |   3   8   7   6   9   6   9   5    2 |    4   8   8  11  11   7  13   6    6
  31  |   3  12  11  10  13   6  11   5    3 |    5   8  14  10  12   7  11   4    6
------|--------------------------------------|--------------------------------------
 RMS  |   5  12  12   9  12   6  13   7      |T   9  13  13  12  14   9  15   9    9
 WRMS |   4  12  10   9  10   6  13   7      |NE  6  11  11  10  12   7  13   7    7

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 4.0851   GPS week: 0851   MJD: 50201.0-50207.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2310 |U  50   33   82 |U  51   35   91 |   36   28   65 |
emr | emr 2386 |   34   24   63 |   37   26   75 |U  26   15   43 |
esa | esa 2072 |  138   94  281 |U 141  104  293 |  114   81  241 |
gfz | gfz 1200 |   34   22   63 |U  33   24   71 |   22   14   40 |
igp | igp 2275 |   39   26   69 |   37   30   74 |   27   17   49 |
igs | igs 2397 |   38   26   70 |   39   29   80 |   29   19   55 |
jpl | jpl 2380 |U  35   22   63 |U  33   25   70 |   23   14   38 |

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 5.0851.0   GPS week: 0851   Day: 0   MJD: 50201.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2196 |   50   35   86 |   56   34   97 |   34   25   62 |
emr | emr 2372 |   37   28   56 |   43   28   74 |   21   15   37 |
esa | esa 2004 |  150   64  143 |   65   56  150 |  120   46  179 |
gfz | gfz 1200 |   35   28   43 |   52   28   88 |   13   15   31 |
igp | igp 2209 |   42   33   73 |   50   40   85 |   26   20   52 |
igs | igs 2400 |   50   32   61 |   43   28   79 |   31   16   47 |
jpl | jpl 2384 |   40   22   59 |   41   26   70 |   17   14   32 |

Table 5.0851.1   GPS week: 0851   Day: 1   MJD: 50202.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2373 |   52   28   73 |   55   28   87 |   41   28   65 |
emr | emr 2397 |   34   25   68 |   32   21   61 |   25   14   40 |
esa | esa 2064 |   65   47  124 |   78   54  167 |   75   70  206 |
gfz | gfz 1200 |   34   20   71 |   28   20   37 |   17   11   35 |
igp | igp 2397 |   36   26   69 |   33   24   59 |   24   16   48 |
igs | igs 2398 |   34   22   71 |   38   23   66 |   27   20   57 |
jpl | jpl 2382 |   35   23   69 |   28   21   51 |   22   13   38 |

Table 5.0851.2   GPS week: 0851   Day: 2   MJD: 50203.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2395 |   51   38   95 |   39   30   87 |   36   27   69 |
emr | emr 2393 |   32   28   79 |   32   22   76 |   28   16   48 |
esa | esa 2099 |   67   46   89 |   70   57  148 |   83   56  149 |
gfz | gfz 1200 |   35   26   77 |   28   18   85 |   30   15   51 |
igp | igp 2362 |   37   30   77 |   32   24   76 |   32   18   57 |
igs | igs 2399 |   38   31   77 |   32   25   78 |   32   17   52 |
jpl | jpl 2382 |   37   28   77 |   25   19   70 |   28   15   44 |

Table 5.0851.3   GPS week: 0851   Day: 3   MJD: 50204.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2398 |   53   35   76 |   47   36   80 |   37   28   62 |
emr | emr 2397 |   35   21   60 |   34   23   59 |   24   16   42 |
esa | esa 2072 |  121  123  311 |  204  198  458 |  102  119  291 |
gfz | gfz 1200 |   34   20   69 |   34   27   55 |   23   15   45 |
igp | igp 2354 |   37   23   65 |   32   26   56 |   23   17   46 |
igs | igs 2399 |   42   30   87 |   44   38   91 |   28   25   70 |
jpl | jpl 2382 |   36   20   59 |   30   22   52 |   23   13   36 |

Table 5.0851.4   GPS week: 0851   Day: 4   MJD: 50205.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2387 |   47   28   85 |   61   36   92 |   34   28   57 |
emr | emr 2381 |   35   22   63 |   52   26  101 |   26   14   44 |
esa | esa 2105 |  282  188  621 |  270  145  530 |  200  132  437 |
gfz | gfz 1200 |   40   19   70 |   25   28   96 |   21   12   42 |
igp | igp 2329 |   43   24   73 |   49   30   96 |   32   15   43 |
igs | igs 2391 |   35   21   67 |   51   27   90 |   22   15   40 |
jpl | jpl 2375 |   33   19   63 |   50   26   95 |   20   12   38 |

Table 5.0851.5   GPS week: 0851   Day: 5   MJD: 50206.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2385 |   45   33   77 |   43   34   86 |   36   23   78 |
emr | emr 2379 |   33   23   57 |   27   23   66 |   28   14   45 |
esa | esa 2064 |   61   35  127 |   51   53  120 |   48   40   98 |
gfz | gfz 1200 |   30   24   56 |   23   15   42 |   24   10   41 |
igp | igp 2180 |   43   27   72 |   26   26   59 |   28   17   56 |
igs | igs 2390 |   31   23   62 |   27   25   67 |   27   15   53 |
jpl | jpl 2373 |   34   22   56 |   19   22   56 |   26   13   43 |

Table 5.0851.6   GPS week: 0851   Day: 6   MJD: 50207.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2036 |   49   33   83 |   49   45  108 |   34   35   56 |
emr | emr 2384 |   33   20   55 |   36   36   82 |   26   17   41 |
esa | esa 2099 |   56   34   97 |   81   59  159 |  101   48  159 |
gfz | gfz 1200 |   28   17   43 |   28   30   68 |   22   16   34 |
igp | igp 2091 |   32   19   54 |   31   36   79 |   22   15   36 |
igs | igs 2399 |   33   18   56 |   35   35   82 |   32   20   56 |
jpl | jpl 2383 |   30   18   52 |   30   34   81 |   23   16   36 |

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