Subject: [IGSREPORT-2868] Wk 0863 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Wed, 7 Aug 1996 6:25:19 PDT

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IGS Electronic Report    Wed Aug  7  6:25:19 PDT 1996      Message Number 2868
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0863 IGS Final Orbits

Final IGS Orbit Combination - Week 0863   (Jul 21, 1996 - Jul 27, 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 (IGS08637.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 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.
These values are supplemented with the current IERS Bulletin A UT1-UTC values. 

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

 IGS08630-6.SP3  IGS GPS ephemeris files for days 0-6, week 0863 in SP3 format.
 IGS08637.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08637.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. Centre clock weights were determined using the following non-SA satellites:
   PRN15 and PRN28.

4. Higher clock RMS for NGS on day 4 (Jul 25) was caused by clock jumps
   on PRN29.

5. Some clock solutions were excluded from combination due to large clock
   shifts/outliers/rms that were biasing the combined clock solution, but were
   kept for the RMS computation. The following table lists the exclusions:

                 Day  (Date)   |   PRN    | Centres 
                ---------------+----------+---------
                  4   (Jul 25) |   ALL    |   ESA  
                ---------------+----------+---------
                  6   (Jul 27) |   ALL    |   ESA  

   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.

6. 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
         ------------+----------+-------+------------------------------
          4 (Jul 25) | 00:00:00 |  14   |   ALL    | Modeling problems     
          5 (Jul 26) | 00:00:00 |  18   |   ALL    | Modeling problems
          6 (Jul 27) | 00:00:00 |  16   |   ALL    | Modeling problems
          6 (Jul 27) | 00:00:00 |  23   |   ALL    | Modeling problems

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

8. SIO solutions were not used in the combination due to late submission
   to CDDIS.

9. Starting with GPS week 0860, several modifications have taken place in the
   IGS combination.  Please refer to the IGS Final Report for GPS week 0860
   (IGS Report #2817 and IGS Mail #1391) for a description of these changes.

10.PRN20 has been unusable since May 10, 1996 (wk 0852, day5) beginning at 
   15:18. PRN20 will not return to service (ref. NANU 118-94204).

11.PRN10 was launched on Jul 16, 1996 (wk862, day2) at 00:50.  The projected
   usable date for PRN10 is Aug 12, 1996 (wk866, day1) (ref. NANU 120-96204).

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08637.SUM).

Table 1: Week 0863 summary.                       (Jul 21, 1996 - Jul 27, 1996)

Table 1.0863.a   GPS week: 0863   MJD: 50285.0-50291.0

         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  67 | .00  .01  .00  -.44   .04  -.10   .0  .06  .06 |    1.4   -6.3    1.5
        | .00  .00  .00   .12   .06   .20   .1           |    3.0    4.9
emr  28 | .00  .00  .00   .18   .21   .58   .0  .11  .10 |  100.0   32.3     .7
        | .01  .01  .01   .11   .12   .28   .1           |   86.1    5.1
esa  49 | .00 -.01  .00   .28  -.17   .23   .2  .09  .07 |  -34.0    3.7    2.7
        | .00  .01  .01   .18   .14   .13   .1           |   90.1    7.3
gfz  46 | .00 -.01 -.01   .21   .07  -.40  -.2  .11  .10 |  100.0   32.1     .6
        | .01  .01  .01   .10   .10   .10   .2           |   86.0    5.1
igr  n/a| .01  .00 -.01  -.17  -.02  -.19  -.1  .12  .12 |    1.4   -1.7     .9
        | .01  .01  .01   .14   .12   .16   .1           |    1.5    4.6
jpl  37 | .00  .02  .01  -.04  -.05  -.04   .0  .07  .06 |  100.0   32.8     .6
        | .00  .00  .00   .08   .06   .09   .1           |   86.1    5.0
ngs  47 |-.01 -.05  .00   .14   .01  -.26  -.2  .15  .15 |  -14.9   23.6  513.9
        | .02  .01  .01   .36   .34   .33   .2           |   38.8   69.6

Table 1.0863.b   GPS week : 0863   MJD: 50285.0-50291.0

         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   4   3   4   4   4   3 |
   2  |   3   3   4   3   3   4   3 |
   3  |   3   4   4   4   5   5   4 |
   4  |   3   3   5   4   3   4   3 |
   5  |   3   4   4   3   3   4   3 |
   6  |   3   4   3   4   3   4   4 |
   7  |   4   4   4   4   4   5   4 |
   9  |   4   4   3   3   3   4   3 |
  14E |   5   5   6   9   5   4   3 |
  15  |   3   3   4   4   4   4   3 |
  16E |   6   7   6   8   9  13   6 |
  17  |   3   4   3   3   3   3   3 |
  18  |   3   4   3   4   3   5   4 |
  19  |   4   3   2   3   3   4   3 |
  21E |   4   5   5   4   4   4   5 |
  22  |   3   4   3   4   4   4   4 |
  23E |   6   6   7   6   6   6   6 |
  24  |   3   3   3   4   4   3   3 |
  25  |   2   3   4   4   5   3   3 |
  26  |   3   3   3   3   4   4   4 |
  27  |   4   2   3   3   3   3   3 |
  28  |   3   4   4   3   4   5   4 |
  29  |   4   5   4   5   4   3   3 |
  31  |   4   4   3   3   4   5   4 |

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 2.0863.0   GPS week: 0863   Day: 0   MJD: 50285.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  66 | .00  .02  .01  -.36   .13   .14  -.1  .06  .06 |    1.4   -8.9    1.5
emr  29 | .01  .01  .00   .23   .30  1.05   .2  .10  .11 | 1604.5   30.2     .6
esa  48 | .00 -.01 -.01   .13  -.28   .05   .1  .08  .07 | -236.6    2.2    1.0
gfz  46 | .01 -.02 -.01   .09   .11  -.52  -.1  .08  .08 | 1606.1   30.3     .5
igr  n/a| .01  .01 -.03  -.14   .01  -.05  -.3  .18  .19 |    2.6   -5.0     .8
jpl  37 | .00  .02  .01  -.07  -.15  -.16   .0  .06  .06 | 1606.0   31.1     .5
ngs  46 | .00 -.04 -.01   .32   .12  -.37  -.2  .15  .15 |    2.5   -9.1   78.2

Table 2.0863.1   GPS week: 0863   Day: 1   MJD: 50286.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .01  .00  -.32   .09   .08   .0  .06  .05 |    4.0  -11.2    1.7
emr  29 | .00  .00  .00   .08   .07   .15  -.2  .11  .10 | 1641.4   32.1     .7
esa  47 | .00 -.01  .00   .02  -.12   .38   .2  .08  .07 |  -18.9    5.7    1.7
gfz  48 |-.01  .00 -.01   .24   .05  -.39   .0  .14  .12 | 1644.3   31.2     .6
igr  n/a| .01  .00  .00  -.13   .04  -.15  -.1  .14  .13 |     .1   -3.6    1.0
jpl  37 | .00  .02  .01  -.14  -.10  -.13   .0  .06  .06 | 1642.8   32.7     .7
ngs  47 | .00 -.05 -.01   .79  -.04  -.62  -.2  .13  .13 |    -.2   -6.3   78.3

Table 2.0863.2   GPS week: 0863   Day: 2   MJD: 50287.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .01  -.48   .09  -.03   .1  .06  .06 |   -2.3   -9.2    1.5
emr  27 | .01  .01  .00   .17   .34   .75  -.1  .14  .13 | 1684.5   27.2     .8
esa  47 | .00 -.01 -.01   .45  -.05   .27   .2  .08  .07 |   -4.4    2.1    1.3
gfz  47 |-.01 -.02  .00   .23  -.03  -.33  -.1  .08  .08 | 1685.3   27.5     .6
igr  n/a| .02  .01 -.02  -.42  -.06  -.14   .0  .12  .10 |    2.3   -6.6     .9
jpl  37 | .00  .03  .01  -.09   .04  -.04   .1  .06  .06 | 1685.2   27.4     .7
ngs  48 |-.01 -.04 -.01   .01  -.48  -.59  -.2  .14  .14 |   -4.6    2.1   77.7

Table 2.0863.3   GPS week: 0863   Day: 3   MJD: 50288.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .01  .01  -.68  -.03  -.05   .1  .07  .06 |    2.0   -5.6    1.4
emr  28 | .00  .00  .01   .00   .36   .53   .1  .11  .09 | 1726.9   37.8     .6
esa  50 | .00  .00  .00   .55  -.08   .41   .2  .12  .08 |   20.7   16.2    1.2
gfz  48 | .00 -.02  .00   .16   .01  -.52  -.4  .09  .09 | 1729.2   36.8     .6
igr  n/a| .02  .00  .00  -.28  -.20  -.43  -.1  .13  .13 |     .6    3.5    1.4
jpl  37 | .00  .02  .00  -.07   .01   .03   .2  .07  .06 | 1727.9   38.0     .6
ngs  49 |-.01 -.04 -.02   .35  -.38  -.19  -.1  .15  .15 |    1.6   -3.2   77.2

Table 2.0863.4   GPS week: 0863   Day: 4   MJD: 50289.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .01  .00  -.48   .00  -.13  -.1  .06  .06 |   -1.2    1.4    1.3
emr  29 | .01  .00  .01   .28   .15   .45   .0  .09  .08 | 1768.1   27.0     .6
esa  47 | .00 -.01 -.02   .29  -.03   .14   .2  .08  .08 |   -2.4   -6.8    4.2
gfz  46 | .00 -.01 -.01   .12  -.06  -.44  -.1  .13  .12 | 1770.8   26.2     .5
igr  n/a| .00  .00 -.01  -.19  -.14  -.40  -.1  .08  .05 |    3.8   -5.2     .6
jpl  37 | .00  .02  .00   .09  -.03   .04   .0  .06  .06 | 1768.9   27.6     .6
ngs  47 |-.04 -.06  .02  -.16   .04  -.35   .0  .16  .16 | -102.7  181.0 1346.0

Table 2.0863.5   GPS week: 0863   Day: 5   MJD: 50290.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 |-.01  .02  .00  -.36   .04  -.29   .0  .07  .05 |    6.2  -10.1    1.6
emr  27 | .00  .00  .00   .32   .09   .59   .0  .13  .11 | 1805.2   31.2     .7
esa  49 | .00  .00  .00   .20  -.23   .15   .3  .10  .08 |     .0    8.0    1.6
gfz  45 | .01 -.02 -.01   .25   .14  -.31   .0  .11  .11 | 1806.3   32.1     .5
igr  n/a| .00  .01  .00  -.08   .06  -.06  -.1  .08  .07 |     .7    -.6     .6
jpl  37 | .01  .02  .01  -.02  -.08  -.06  -.1  .08  .09 | 1806.1   31.8     .6
ngs  47 |-.01 -.05 -.01  -.14   .40   .28  -.4  .17  .17 |    2.8   -6.5   79.0

Table 2.0863.6   GPS week: 0863   Day: 6   MJD: 50291.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .02  .00  -.42  -.02  -.43   .0  .05  .05 |    -.2    -.8    1.3
emr  30 | .00 -.01 -.01   .17   .18   .52  -.1  .09  .09 | 1839.2   40.6     .6
esa  53 |-.01  .00  .00   .30  -.41   .21   .1  .08  .07 |    3.3   -1.2    4.8
gfz  45 | .01 -.01 -.02   .39   .24  -.27  -.4  .13  .11 | 1840.9   40.9     .6
igr  n/a| .00  .01  .00   .01   .14  -.09  -.3  .11  .07 |    -.4    5.4     .6
jpl  37 | .00  .01  .01   .01  -.02   .07  -.1  .06  .06 | 1841.0   40.7     .6
ngs  48 | .02 -.04  .00  -.18   .38   .02  -.6  .14  .14 |   -3.4    7.4   79.2

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 3.0863.0   GPS week: 0863   Day: 0   MJD: 50285.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   4   7   5   7  29   6  15    3 |    7   8   9  12  31   6  13    7
   2  |   4   6   9  11  15   5  10    3 |    6   9   7  13  14   8  17    8
   3  |   5   9   6   7   9   5  17    3 |    6  11   8  13  11   5  15    6
   4  |   4   8   4   5  15   4  14    3 |    5   8   9  10  14   4  13    6
   5  |   5   8   7   9  17   5  16    3 |    5  13   8  11  14   5  11    6
   6  |   5  10   9   7  14   5  11    3 |    7   8  10  10  14   5  14    6
   7  |   8   9   6  13  21   6  10    4 |    7  12   9  11  20   6  14    7
   9  |  10  15   9   7   7   5   8    4 |    9  15  11  13  12   8   9    8
  14E |   5 ---  15   8  35   9  12    5 |    6 ---  21  12  28   4  17    9
  15  |   6   8  10   6  20   5  12    3 |    8  11   7   8  10   6  11    7
  16E |  13   7  11 ---  25  11  24    6 |   47  54  45 ---  49  55  51   48
  17  |   2   8   8   9  10   4   7    3 |    5   9   8   9  13   5   9    6
  18  |   5   7   4   8  10   4  11    3 |    6   8   7  11  12   6  10    6
  19  |   6  13   6  10   8   6   9    4 |    8  11  10  11  14   8  13    9
  21E |   6  17   9   6  33   7  14    4 |   27  29  26  31  40  29  30   27
  22  |   5  13   9   6  12   4  12    3 |    7  11   9  12  13   6  13    8
  23E |  12  13   8   7   9   8  36    6 |   42  46  42  37  42  40  45   41
  24  |   5   6   5   6  17   4   8    3 |    5   9   7  11  12   5   9    6
  25  |   5   8   4   5  18   4   8    2 |    8   8   8  11  13   8  11    8
  26  |   5   7   4   8  22   5   9    3 |    6   7   7  13  20   5   9    7
  27  |   4  19   7   8  12   5   5    4 |    9  18   8  15  15   8  11   10
  28  |   6   7   7   6  10   4  14    3 |    6  11   9  13  15   7  15    7
  29  |   4  12   9   8  18   4  16    4 |    6   8   9  15  24   5  17    7
  31  |   6   8   5  15   9   7  16    4 |    6  10   8  15  11   6  13    5
------|----------------------------------|----------------------------------
 RMS  |   6  10   8   8  18   6  15      |T  15  18  16  15  21  16  19   15
 WRMS |   6  11   7   8  19   6  15      |NE  6  10   8  11  15   6  12    7
 MEDI |   5   8   7   7  15   5  12      |MD  7  11   9  12  14   6  13    7

Table 3.0863.1   GPS week: 0863   Day: 1   MJD: 50286.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   6  11  12   6  16   5  15    4 |    7  15  12  10  19   7  18    8
   2  |   4  11   6  14  20   4  10    3 |    5   9   8  13  16   5  15    6
   3  |   4   9   6  14  15   6  15    4 |    6  10  11  19  19   5  16    8
   4  |   6  11   6  11  14   7   9    3 |    5  14   9  17  16   5  10    6
   5  |   7   7   4  17  18   4  12    4 |    4   9   7  11  25   5  10    4
   6  |   6  12  12   7  10   5   7    4 |    6   9  12   9  14   6  11    6
   7  |   7  10   7  19  15   6  10    4 |    6  12  11  22  18   6  14    7
   9  |   6  11   7  12   6   4  13    4 |    5  12   7  10  11   7   8    5
  14E |   8  10  15  15  24  12  14    5 |    6  12  21  11  26   8  17    8
  15  |   5   7   6   9  18   6  10    3 |    7   6   8   8  12   6  12    6
  16E |  11  17  10 ---  14   7  24    7 |   36  31  37 ---  46  37  47   35
  17  |   4  10   9   6  10   5  15    4 |    6  11   8  12  20   5  13    6
  18  |   6   8   5  23   9   5   7    4 |    7   9   8  14  12   9  10    7
  19  |   5   7   5  14   8   3   5    3 |    6   9   8  10  13   5   7    6
  21E |   5 ---  12  18  20  10  12    5 |   22 ---  24  27  27  24  28   21
  22  |   6  10   7  15  12   4  10    4 |    5  11  12  17  20   6  15    7
  23E |  10  20   5  16  10   9  19    6 |   31  36  33  35  38  32  43   32
  24  |   4   5   8   9  14   5   9    3 |    4   7   7  11   9   4   9    4
  25  |   6   7   7   9  10   7  10    3 |    8  10  12  12  17   7  10    8
  26  |   5   7   4   9  15   5  13    3 |    4  10   6  10  18   5  12    4
  27  |   5   6   4   6  13   3   6    2 |    7  13   6   7  10   7   9    6
  28  |   5   8   6  21  17   5  12    4 |    8  11  12  23  22   7  13   10
  29  |   7  16   6  13   8   5  19    5 |    7  13   8  17  13   7  15    7
  31  |   4   9   6  16  10   6  14    4 |    4   9   7  14  13   4  13    4
------|----------------------------------|----------------------------------
 RMS  |   6  11   8  14  14   6  13      |T  12  14  14  16  20  12  18   12
 WRMS |   5  10   7  12  13   6  13      |NE  5  10   9  14  16   6  12    6
 MEDI |   6  10   6  14  14   5  12      |MD  6  11   9  12  18   6  13    7

Table 3.0863.2   GPS week: 0863   Day: 2   MJD: 50287.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   5   7   4   4  16   8  15    3 |    6  12   6   7  22   9  17    6
   2  |   4  20   5   6  12   5  10    4 |    5  18   6  12  12   7  13    7
   3  |   8  11   8   7   7   6  16    4 |    7  10  11  13  14   5  14    7
   4  |   6  28   6  10  11   6  12    5 |    5  29   7  11  14   4  12    6
   5  |   5  16   4  12  16   5   6    4 |    5  18   7  11  18   7  13    7
   6  |   6  10   7   9  10   6  13    3 |    7   9  10  10  12   6  13    6
   7  |   7  12   5  11  13   5   9    4 |   10  13   9  12  16   9  14    9
   9  |   7  14   5   7   8   3   7    3 |    5  16  12  10  10   8  11    8
  14E |   8 ---  14 ---  20   8  13    6 |    9 ---  16 ---  16   4  18    8
  15  |   5  17   6   6   6   6  13    4 |    6  15   8   8  10   7  14    5
  16E |  11  17  12 ---  20  12  13    6 |   34  36  40 ---  41  40  39   36
  17  |   4  10   9   7  11   5   9    3 |    5  11   6  10  13   4  13    5
  18  |   4  13   7   7   6   5   7    3 |    9  14  11  14  15   9  11    9
  19  |   3  10   4   6   5   5   7    2 |    7   9   8   9   9   7   9    6
  21E |   8  12   7  14  21  11  13    5 |   23  31  29  31  36  25  31   26
  22  |   6  11   9   7   9   5  10    3 |    6   9  12  11  14   6  13    7
  23E |   7  22  13  13   9   8  35    7 |   37  41  42  39  37  35  50   38
  24  |   4  10   5   6   7   5   9    3 |    5  10   8  10  11   5  10    6
  25  |   6  10   8   5  14   6  14    4 |    6  10   9   7  18   8  10    6
  26  |   5   6   6   6   7   5  10    3 |    8   6  12   7  12   5  11    6
  27  |   6   9   8   6   5   4   8    3 |    6  12  10  11  10   7   9    7
  28  |   5  12   7   7   6   4  17    4 |    6  12   9  10  11   5  19    7
  29  |   7  13   7  12  10   4  18    4 |    6   8   8  12  13   5  16    5
  31  |   6   7   5  10   7   6  13    3 |    6   7   9  12  14   5  12    6
------|----------------------------------|----------------------------------
 RMS  |   6  14   8   8  12   6  14      |T  12  18  15  14  18  13  18   13
 WRMS |   6  13   7   8  10   6  14      |NE  6  13   9  10  13   6  12    6
 MEDI |   6  12   7   7  10   5  13      |MD  6  12   9  11  14   7  13    7

Table 3.0863.3   GPS week: 0863   Day: 3   MJD: 50288.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   7  10   7   7  10   6  15    4 |    8  14  15   9  15  10  18    9
   2  |   4  11   6   7  13   5   9    3 |    6  10  14  12  15   8  15    8
   3  |   8  14   7   8  11   4  10    4 |    9  12  11  15  15   6  14    7
   4  |   6   8   5   6  12   6  22    4 |    6  14   9  11  15   6  23    7
   5  |   4  10  10   6  10   5  12    3 |    5   9  10  11  13   5  13    5
   6  |   7  11   7   8  18   5  13    4 |    8  12  12  11  17   6  12    6
   7  |   9  11  12  11  19   6  10    4 |   13  15  14  15  18  13  23   12
   9  |   6  12   6   6   8   4  14    3 |    7  14  12  11   9   8  13    8
  14E |  11  20  39  10  22  20  19    9 |    8  16  21   9  14  25  17    8
  15  |   8  13   5   7  13   6  12    4 |   10  15   9  10  10   6  10    7
  16E |  16  14  21 ---  11   9  19    8 |   42  45  34 ---  42  45  44   41
  17  |   4   7   8  10  11   5  10    3 |    6   8   9  15  13   6  12    6
  18  |   8   9   7  12  14   5   8    4 |    7  13  11  12  13   6  11    5
  19  |   5   8   5   7   5   5   8    3 |    8  11  12  11  12   9  11    9
  21E |   6  11   9  12  23   8  18    4 |   21  28  25  26  29  21  31   23
  22  |   6   9  10  10  13   5  10    4 |    5   9   8  14   8   7  14    7
  23E |   9   8  13  12  13   6  29    6 |   44  46  45  44  48  44  43   44
  24  |   6   9   6  11   6   6  21    4 |    6  10   6  15  12   6  17    6
  25  |   7   7   9   7  13   6  16    4 |    9  11  17  12  13   9  15   10
  26  |   6   7   7   8   6   6  11    3 |    8   8   9  12  15   6  13    6
  27  |   4   6   7   6  15   4   7    3 |    6  10  14  10  15   8   9    8
  28  |   6  10   9   6   5   4  10    3 |   11  14  11  22  13  11  16   12
  29  |   6  13   9  11   7   8  20    5 |    8  11  12  17  12   7  19    8
  31  |   6   7   6  11   9   5  13    3 |    8  12  11  17  17   8  16    8
------|----------------------------------|----------------------------------
 RMS  |   7  11  12   9  13   7  15      |T  15  18  16  16  19  16  20   15
 WRMS |   6   9   8   9  13   6  15      |NE  7  11  11  13  13   7  15    7
 MEDI |   6  10   7   8  12   6  13      |MD  8  12  12  12  15   8  15    8

Table 3.0863.4   GPS week: 0863   Day: 4   MJD: 50289.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   7   8   3  18   3   5  13    4 |    7  12   7  13  11   6  19    5
   2  |   4   7   5  13   4   5  14    3 |    5  12  11  11  14   7  17    7
   3  |   7  15  10  19   4   6  15    5 |    9  14  18  19  13   7  18    8
   4  |   5   6   7  10   7   5  11    3 |    7  11   7  14  11   3  17    7
   5  |   4   6   9  10   3   5  10    3 |    7   9  12  11  13   5  14    7
   6  |   6   9   8   8   6   4  11    3 |    7  10  10  11  11   6  13    6
   7  |   6  12   6  13   9   6  13    4 |   10  16  14  20  13  10  15   11
   9  |   6   9   5   7   7   4  12    3 |    7  16   9  11  12   7  12    8
  14E |   4   8 --- ---  26   7 ---    5 |    9  12 --- ---  13   5 ---    7
  15  |   8  10   8  12   7   4  10    4 |    8  10   8   9   8   5   8    5
  16E |  13   9 --- ---  15  17  20    9 |   47  47 --- ---  43  42  43   43
  17  |   4   6   8   9   4   4   9    3 |    4   8   9  11  12   4  14    5
  18  |   6   6   6  16   5   6   8    3 |    6   9  10  15  14   6  10    7
  19  |   4   6   8  14   5   4  11    3 |   10  13  12  16  17  12  22   12
  21E |   4  10   9  15   8   7  15    4 |   20  23  25  27  26  19  32   21
  22  |   6   8  10  15   4   6  16    4 |    5   9  12  17  13   5  15    7
  23E |   8   8   9  17   9   6  35    6 |   43  45  43  53  52  43  52   44
  24  |   5   8   9  12   9   6  15    4 |    6  10   6  13  12   3  18    6
  25  |   8   8   8   9   3   4  27    5 |    8  10  14  13  13   9  23    9
  26  |   7   7   8   7   3   6  18    4 |    7   8  12   9  13   5  13    6
  27  |   4   7   9   9   4   3   9    3 |    6  10  12  10  12   7  13    7
  28  |   5  12   8  17   5   6  16    4 |    9  14  14  16  12   7  19    9
  29  |   5  10   5   8   5   6  20    4 |    6  11   8  11  12   7  21    6
  31  |   5   7   7  17   8   7  16    4 |    6   8   9  13  10   6  14    5
------|----------------------------------|----------------------------------
 RMS  |   6   9   8  13   8   6  16      |T  15  17  14  18  18  14  21   14
 WRMS |   6   8   8  12   5   6  16      |NE  7  11  11  13  12   6  16    7
 MEDI |   6   8   8  13   5   6  14      |MD  7  11  12  13  13   7  17    7

Table 3.0863.5   GPS week: 0863   Day: 5   MJD: 50290.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   5  14   7   9  14   5  14    4 |    8  10  10  11  18   9  16    8
   2  |   4  14   7  15   8   4  11    4 |    5  16   9  11  13   6  16    8
   3  |   6  23   9  16   8   6  15    5 |    7  21  15  18  13   6  21    8
   4  |   7   6   4  11   6   7  18    4 |    6   9   5  13  14   5  17    6
   5  |   5   9   7  14   8   4   8    4 |    6   9  10  12  13   6  13    7
   6  |   6  10   9  10   5   6  11    4 |   10   8  10  16  16  12  17   10
   7  |   7  18  11  13   9   6  17    5 |   10  16  14  15  12  12  19   11
   9  |   5  15   6   9   5   5  12    4 |    6  20   9  11  11   7  10    8
  14E |   8   8  12   7   8   8  10    4 |   10  12  10   8  12   5  13    8
  15  |   4  21   6  10   5   5  13    4 |    6  20   6   9  12   5  11    5
  16E |  18  20  23 ---  13  31  32   13 |   50  45  40 ---  48  65  48   47
  17  |   4   7   5   6   5   4  13    3 |    5   9   6  10  11   4  17    5
  18  |   7  11  22   6   8   7   9    5 |   36  33  22  37  39  36  32   32
  19  |   4  12   9  12   7   6   8    4 |   15  19  18  15  24  14  18   15
  21E |   5  12  11  14   7   6  14    4 |   24  27  27  25  26  26  28   23
  22  |   9  10   8  14   9   5  10    4 |    5  13  11  16  12   7  16    7
  23E |   6   8  13   6   6   4  38    6 |   52  54  51  57  55  46  65   51
  24  |   3   7   7   9   9   4  15    3 |    6   9   5  11  14   5  13    5
  25  |   5   6   6   7   7   7  12    3 |    9   7  10  13  13   9  20    9
  26  |   6  13   8   9   7   5  11    4 |    7  10   9  14  15   6  21    7
  27  |   4   8   5   7   4   5  13    3 |    5  10   7   9  12   6  12    6
  28  |   5  17  14  15   6   5  18    5 |    8  18   9  14  11   6  21    8
  29  |   5   7   4   7   6   6  16    3 |    6   8   7  11  10   7  15    5
  31  |   5   9   9  23   5   5  20    5 |    7  10   9  13  11   8  16    7
------|----------------------------------|----------------------------------
 RMS  |   7  13  10  11   8   8  16      |T  18  20  17  19  21  19  23   17
 WRMS |   5  11   8  11   7   9  17      |NE 10  15  10  15  16  11  17   10
 MEDI |   5  11   8  10   7   5  13      |MD  7  13  10  13  13   7  17    8

Table 3.0863.6   GPS week: 0863   Day: 6   MJD: 50291.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   5   9   5   9   7   6  11    3 |    7  12   8  12  14   9  14    8
   2  |   3   7   7  13   5   5  12    3 |    8  12  10  11  14   9  18   10
   3  |   5   5   8  19   7   6  21    4 |    7  11   8  20  10   6  21    8
   4  |   4   7   5  11   5   4   9    3 |    7   9   6  15  14   6  11    7
   5  |   6   7   7  14   5   4   9    3 |    8  10  10  16  12   8  12    9
   6  |   6  16   7   8   7   5  13    4 |    8  16   6   9  11   5  14    6
   7  |   4   9   5  13   9  11  10    4 |   11  18  10  13  14   9  17   10
   9  |   5   8   6   9   4   3  11    3 |    9  14  11  13  13   9  10    9
  14E |   6   9   7   9   3   6  10    3 |    6  12   9   8  10   6  11    7
  15  |   6   9   5   5   4   3  11    3 |    7  13   6  10  13   6  11    7
  16E |   9   8 --- ---  48   9 ---    6 |   40  25 --- ---  41  41 ---   41
  17  |   4   6   7   7   4   5  11    3 |    6   9   9  12  13   5  14    8
  18  |   7  10  10  12   6   6   6    4 |   20  18  20  21  26  20  20   19
  19  |   2   5   6  14   4   3  15    3 |   11  13  12  13  14  12  15   11
  21E |   5  16  13  10   5   7  19    5 |   38  39  40  37  45  44  50   41
  22  |   7   8   6  21   6   5  15    4 |    6  10   9  16  12   6  18    8
  23E |   7  11  11  24   5   9  31    6 |    7   4   6   4   8   7   4    5
  24  |   4   9   8  10   8   6  10    3 |    7  12   6  15  15   7  10    7
  25  |   7   5   5  11   5   4   8    3 |   11  11  13  14  15  11  14   12
  26  |   5   9  14  12   6   4  14    4 |   10  10  10  14  15   6  11    7
  27  |   3   5   5   7   3   4  12    3 |    8  10   7  11  12   8  14    8
  28  |   4   6   9  13   6   5  14    4 |    8  11   7  15  12   6  15    8
  29  |   4   8   6   9   3   5  15    3 |    7  10   7  13  11   7  16    6
  31  |   5   7   7  20   7   5  20    4 |    8  11  10  18  13   8  18    9
------|----------------------------------|----------------------------------
 RMS  |   5   9   8  13  11   6  14      |T  14  14  12  15  18  14  17   14
 WRMS |   5   9   7  11   7   6  14      |NE  9  12   9  14  14   8  14    9
 MEDI |   5   8   7  11   5   5  12      |MD  8  12   9  13  13   8  14    8

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 4.0863   GPS week: 0863   MJD: 50285.0-50291.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2288 |U  50   31   83 |U  48   34   81 |   39   26   63 |
emr | emr 2235 |   43   26   65 |   37   27   63 |U  26   15   42 |
esa | esa 1997 |  132   53  129 |U  72   60  134 |   93   55  160 |
gfz | gfz 1090 |   50   25   72 |U  40   29   62 |   25   17   41 |
igr | igr 2045 |   43   28   74 |   36   32   72 |   27   19   45 |
igs | igs 2304 |   41   25   68 |   34   27   59 |   26   15   41 |
jpl | jpl 2288 |   41   24   68 |U  33   25   58 |   25   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 5.0863.0   GPS week: 0863   Day: 0   MJD: 50285.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2304 |   53   30   76 |   48   27   82 |   36   23   61 |
emr | emr 2183 |   50   26   67 |   32   23   59 |   22   12   42 |
esa | esa 1998 |   44   27   72 |   35   23   61 |   24   14   40 |
gfz | gfz 1104 |   79   28   77 |   32   26   59 |   21   10   45 |
igr | igr 1745 |   49   30   78 |   38   27   68 |   22   16   41 |
igs | igs 2304 |   46   25   69 |   30   22   56 |   22   12   38 |
jpl | jpl 2288 |   47   24   71 |   27   24   54 |   22   12   35 |

Table 5.0863.1   GPS week: 0863   Day: 1   MJD: 50286.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2301 |   64   30   76 |   56   38   82 |   37   30   47 |
emr | emr 2197 |   56   28   56 |   49   30   55 |   25   14   39 |
esa | esa 1992 |   55   28   62 |   63   30  101 |   33   24   51 |
gfz | gfz 1104 |   46   27   68 |   54   20   43 |   30   19   42 |
igr | igr 1744 |   35   26   69 |   41   30   67 |   24   17   38 |
igs | igs 2304 |   55   26   59 |   47   27   48 |   24   16   32 |
jpl | jpl 2288 |   54   26   60 |   47   25   46 |   23   14   31 |

Table 5.0863.2   GPS week: 0863   Day: 2   MJD: 50287.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2303 |   56   33   76 |   45   28   79 |   34   27   64 |
emr | emr 2165 |   43   24   62 |   45   17   60 |   28   20   42 |
esa | esa 2046 |   44   24   57 |   44   25   73 |   30   20   41 |
gfz | gfz 1056 |   53   20   52 |   50   19   59 |   25   22   28 |
igr | igr 1945 |   47   28   55 |   40   26   67 |   25   23   38 |
igs | igs 2304 |   45   25   57 |   35   19   55 |   26   18   39 |
jpl | jpl 2288 |   43   24   56 |   35   19   53 |   27   19   37 |

Table 5.0863.3   GPS week: 0863   Day: 3   MJD: 50288.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2246 |   35   25   86 |   46   41   76 |   46   25   59 |
emr | emr 2292 |   27   22   64 |   28   36   56 |   28   13   42 |
esa | esa 2020 |   28   21   73 |   35   62   62 |   31   17   47 |
gfz | gfz 1104 |   45   18   67 |   28   39   56 |   33   17   36 |
igr | igr 2027 |   53   25   94 |   41   49   88 |   37   30   63 |
igs | igs 2304 |   26   19   70 |   30   38   55 |   32   14   42 |
jpl | jpl 2288 |   26   19   71 |   28   33   55 |   30   13   40 |

Table 5.0863.4   GPS week: 0863   Day: 4   MJD: 50289.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2304 |   41   28   74 |   39   35   89 |   43   25   72 |
emr | emr 2303 |   33   21   55 |   25   31   77 |   26   15   39 |
esa | esa 1890 |  118   51  123 |  125   92  240 |  117   65  222 |
gfz | gfz 1056 |   30   17   49 |   28   33   85 |   23   17   40 |
igr | igr 2259 |   36   21   57 |   24   33   81 |   28   13   43 |
igs | igs 2304 |   33   20   57 |   25   31   74 |   26   15   42 |
jpl | jpl 2288 |   33   19   56 |   23   31   72 |   25   14   37 |

Table 5.0863.5   GPS week: 0863   Day: 5   MJD: 50290.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2255 |   48   38   88 |   44   38   86 |   35   24   65 |
emr | emr 2298 |   40   32   57 |   30   27   65 |   23   12   38 |
esa | esa 2043 |   48   31   67 |   39   34   89 |   27   16   43 |
gfz | gfz 1104 |   44   35   61 |   27   31   56 |   18   12   35 |
igr | igr 2302 |   39   33   60 |   31   28   65 |   22   12   36 |
igs | igs 2304 |   40   31   63 |   30   26   61 |   23   13   38 |
jpl | jpl 2288 |   39   30   60 |   28   24   62 |   23   12   38 |

Table 5.0863.6   GPS week: 0863   Day: 6   MJD: 50291.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2302 |   46   31  101 |   53   28   75 |   39   25   69 |
emr | emr 2206 |   46   24   88 |   42   20   67 |   26   15   48 |
esa | esa 1990 |  313  115  280 |  106   99  193 |  204  124  346 |
gfz | gfz 1104 |   41   26  111 |   47   28   69 |   23   19   55 |
igr | igr 2295 |   38   27   91 |   37   21   66 |   26   13   49 |
igs | igs 2303 |   38   24   93 |   39   19   57 |   27   14   51 |
jpl | jpl 2286 |   37   24   91 |   38   18   59 |   24   12   49 |

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