Subject: [IGSREPORT-3081] Wk 0874 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 22 Oct 1996 6:32:52 PDT

******************************************************************************
IGS Electronic Report    Tue Oct 22  6:32:52 PDT 1996      Message Number 3081
******************************************************************************

Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0874 IGS Final Orbits

Final IGS Orbit Combination - Week 0874   (Oct 06, 1996 - Oct 12, 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 (IGS08747.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:

 IGS08740-6.SP3  IGS GPS ephemeris files for days 0-6, week 0874 in SP3 format.
 IGS08747.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08747.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 28 

6. 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
         ------------+----------+-------+------------------------------
          3 (Oct 09) | 00:00:00 | 14,30 |   ALL    | Modeling problems
          4 (Oct 10) | 00:00:00 |  19   |   ALL    | Modeling problems (a)
          5 (Oct 11) | 00:00:00 |  18   |   ALL    | Modeling problems
          6 (Oct 12) | 00:00:00 |  31   |   ALL    | Modeling problems

  (a) Due to unrealistic long arc RMS, PRN19 was excluded from the long arc
      evaluation on day 3 for ACs that submitted solutions for this satellite;

7. PRN21 was set unhealthy from day 1 (Oct 7) @ 14:30 until day 4 (Oct 10)
   @ 21:52 (Ref. NANU 175-96285). This could explain higher RMS for PRN21 
   on days 1-2.

8. 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.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08747.SUM).

Table 1: Week 0874 summary.                       (Oct 06, 1996 - Oct 12, 1996)

Table 1.0874.a   GPS week: 0874   MJD: 50362.0-50368.0

         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  77 | .00  .02 -.01  -.25  -.01   .29  -.2  .06  .05 |   -2.4    2.4    1.3
        | .00  .00  .00   .07   .04   .08   .0           |    6.5   10.8
emr  31 | .00  .00  .00   .18  -.03   .22  -.1  .08  .07 |  491.3   23.3     .5
        | .00  .01  .00   .05   .11   .18   .1           |   39.8    8.4
esa  54 |-.01  .00  .00   .26  -.11   .15   .1  .09  .07 |    4.4   19.2     .9
        | .00  .01  .00   .12   .18   .13   .1           |   18.8   11.3
gfz  48 | .00 -.03  .00   .14   .13  -.25  -.1  .07  .06 |  492.9   23.4     .5
        | .00  .00  .00   .07   .09   .11   .1           |   39.9    8.4
igr  n/a| .01 -.01  .00  -.09  -.02  -.02  -.1  .09  .04 |    -.2    1.4     .5
        | .01  .01  .00   .07   .06   .15   .1           |     .4    1.0
jpl  37 | .00  .01  .00  -.14  -.08   .11   .2  .05  .06 |  492.7   23.3     .5
        | .00  .01  .00   .05   .10   .14   .1           |   39.9    8.3
ngs  49 | .00 -.05  .00   .33  -.03  -.33  -.1  .14  .14 |   -2.2    2.7   78.6
        | .01  .01  .01   .32   .14   .26   .1           |    5.0    6.4
sio  114| .00  .02  .01  -.20   .06  -.37   .1  .07  .06 |     .0     .0     .0
        | .01  .01  .01   .08   .04   .29   .1           |     .0     .0

Table 1.0874.b   GPS week : 0874   MJD: 50362.0-50368.0

         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  |   2   2   3   3   2   2   3 |
   3  |   3   3   3   3   2   3   3 |
   4  |   3   2   3   3   3   3   3 |
   5  |   3   2   3   2   2   2   2 |
   6  |   3   3   4   3   2   3   3 |
   7  |   3   2   3   4   3   3   2 |
   9  |   3   3   3   2   3   3   6 |
  10  |   3   3   3   3   2   3   3 |
  14  |   2   2   3   3   3   2   2 |
  15  |   3   3   3   4   3   3   3 |
  16  |   3   2   2   2   2   2   3 |
  17  |   3   2   3   2   2   2   2 |
  18  |   2   2   2   4   2   3   3 |
  19E |   3   3   4  16   3   3   3 | Modeling problems on day 3.
  21  |   2  15  10   3   2   3   3 | See Remark 7.
  22  |   2   2   3   3   2   2   3 |
  23  |   2   3   4   3   3   3   3 |
  24  |   3   2   2   2   2   3   2 |
  25  |   3   3   3   3   3   3   3 |
  26  |   3   3   3   3   2   3   3 |
  27  |   3   2   3   4   3   3   3 |
  28  |   3   2   3   3   2   2   2 |
  29  |   2   2   3   2   2   2   2 |
  30  |   5   6   5   5   5   5   5 |
  31  |   3   2   3   3   2   3   7 |

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 2.0874.0   GPS week: 0874   Day: 0   MJD: 50362.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02 -.01  -.29  -.04   .34  -.2  .05  .05 |   11.1  -14.6    1.4
emr  29 |-.01  .00  .00   .13   .02   .02   .0  .07  .07 |  440.9   11.6     .5
esa  56 | .00  .00  .01   .44  -.08   .26   .2  .07  .06 |   17.1    3.5     .9
gfz  48 | .00 -.03 -.01   .14   .17  -.31  -.1  .07  .06 |  442.6   11.8     .4
igr  n/a| .01  .00  .00  -.19  -.02  -.18  -.1  .05  .04 |     .2    1.2     .5
jpl  37 | .00  .00  .00  -.20  -.13   .07   .3  .05  .05 |  442.2   11.7     .5
ngs  47 | .00 -.05 -.01   .76   .03  -.15  -.1  .12  .12 |    7.5   -7.8   78.4
sio  115| .00  .02  .02  -.37   .12  -.41   .1  .06  .06 |     .0     .0     .0

Table 2.0874.1   GPS week: 0874   Day: 1   MJD: 50363.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  75 | .00  .02 -.01  -.16   .00   .34  -.2  .06  .05 |     .4    9.1    1.2
emr  33 | .00 -.01  .00   .18   .13   .30  -.2  .08  .07 |  454.1   27.7     .5
esa  55 |-.01 -.01  .00   .10  -.36   .18   .0  .09  .07 |   17.2   23.8     .9
gfz  50 | .00 -.02  .00   .24   .20  -.35  -.2  .06  .06 |  455.5   28.0     .4
igr  n/a| .02 -.02  .01  -.12   .05   .19  -.1  .07  .06 |    -.7    3.0     .6
jpl  37 | .00  .01  .00  -.20  -.15  -.19   .1  .04  .04 |  455.2   27.9     .5
ngs  50 | .00 -.06  .00   .36  -.03  -.14  -.1  .13  .13 |   -1.7   10.3   78.9
sio  117| .00  .02  .01  -.15   .05   .01   .1  .06  .05 |     .0     .0     .0

Table 2.0874.2   GPS week: 0874   Day: 2   MJD: 50364.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  74 | .00  .02 -.01  -.31   .02   .30  -.2  .06  .06 |   -4.5    1.9    1.3
emr  32 | .00 -.01  .00   .18   .07   .24  -.1  .08  .07 |  471.1   13.6     .5
esa  54 |-.01  .00  .00   .29  -.31   .12   .1  .08  .07 |   15.5    6.4    1.2
gfz  47 | .01 -.02 -.01   .18   .18  -.27  -.1  .07  .07 |  472.5   13.9     .5
igr  n/a| .01 -.01  .00  -.01   .06  -.23  -.1  .06  .04 |    -.1     .7     .5
jpl  37 | .01  .02  .00  -.12  -.14   .14   .3  .06  .06 |  472.5   13.6     .5
ngs  50 | .00 -.05  .01  -.13  -.12   .03   .0  .12  .12 |   -1.2   -3.7   79.0
sio  117|-.02  .01  .02  -.12   .05  -.64   .2  .08  .07 |     .0     .0     .0

Table 2.0874.3   GPS week: 0874   Day: 3   MJD: 50365.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02 -.01  -.33   .02   .37  -.3  .08  .05 |   -3.6   -3.5    1.3
emr  30 | .01  .01  .00   .11  -.19   .55  -.1  .10  .09 |  485.1   33.2     .6
esa  52 |-.01  .00  .00   .31   .18   .20   .2  .10  .08 |    9.6   34.9     .9
gfz  49 | .00 -.03  .00   .12   .13  -.28  -.1  .06  .06 |  486.7   33.3     .5
igr  n/a| .00 -.01 -.01  -.06  -.06  -.07   .0  .20  .04 |    -.4    1.8     .7
jpl  37 | .00  .02  .00  -.10  -.12   .21   .2  .08  .09 |  486.5   33.1     .6
ngs  48 |-.01 -.05  .00   .71   .10  -.56  -.2  .17  .17 |   -5.1    3.6   78.5
sio  113| .01  .02  .00  -.19  -.01  -.69   .2  .09  .08 |     .0     .0     .0

Table 2.0874.4   GPS week: 0874   Day: 4   MJD: 50366.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .02  .00  -.27  -.06   .14  -.2  .05  .04 |   -7.2   12.9    1.1
emr  33 | .00  .00 -.01   .24   .02   .08  -.1  .06  .06 |  507.1   30.7     .5
esa  56 |-.01 -.01  .01   .24  -.13   .09   .2  .08  .07 |    9.2   26.1     .7
gfz  51 | .00 -.03  .00   .01  -.05  -.33   .0  .08  .07 |  508.5   31.0     .4
igr  n/a| .01  .00  .00  -.17   .00  -.02   .0  .03  .03 |    -.6    2.2     .5
jpl  37 | .01  .01 -.01  -.08   .14   .14   .3  .04  .04 |  508.5   30.6     .5
ngs  50 |-.01 -.05  .00   .11  -.27  -.31  -.1  .11  .11 |   -8.2    7.2   79.9
sio  113| .00  .01  .01  -.14   .10  -.07   .1  .05  .05 |     .0     .0     .0

Table 2.0874.5   GPS week: 0874   Day: 5   MJD: 50367.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .02 -.01  -.22   .06   .31  -.3  .05  .05 |   -6.2   15.5    1.3
emr  29 |-.01 -.01  .00   .18  -.12   .22  -.1  .07  .07 |  535.2   26.0     .5
esa  56 | .00 -.01  .00   .34  -.09  -.10   .0  .10  .08 |   -2.2   24.4     .7
gfz  47 | .01 -.02  .00   .15   .07  -.18  -.1  .06  .06 |  536.9   25.9     .5
igr  n/a| .00  .00  .00  -.02  -.08   .06  -.1  .04  .04 |    -.1     .4     .5
jpl  37 | .00  .01 -.01  -.14  -.10   .24   .3  .05  .05 |  536.6   25.9     .5
ngs  48 | .00 -.04  .00   .37   .16  -.51  -.1  .12  .12 |   -1.1    2.5   78.6
sio  108| .00  .01  .01  -.22   .06  -.17   .1  .05  .05 |     .0     .0     .0

Table 2.0874.6   GPS week: 0874   Day: 6   MJD: 50368.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  75 | .00  .02 -.01  -.15  -.05   .27  -.3  .08  .05 |   -6.7   -4.3    1.3
emr  30 | .00 -.01  .00   .25  -.11   .13  -.1  .07  .07 |  545.8   20.0     .5
esa  51 | .00  .00  .01   .12   .00   .27   .2  .09  .08 |  -35.5   15.3     .7
gfz  45 | .00 -.02  .00   .12   .18  -.03   .0  .07  .07 |  547.4   19.9     .5
igr  n/a| .00 -.01  .00  -.07  -.07   .11   .1  .04  .04 |     .3     .4     .5
jpl  37 | .00  .01  .01  -.12  -.04   .19   .2  .05  .05 |  547.1   20.1     .5
ngs  49 | .01 -.06  .01   .14  -.07  -.66  -.3  .17  .17 |   -5.3    7.0   76.6
sio  112|-.01  .01  .01  -.17   .04  -.62   .0  .08  .08 |     .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 3.0874.0   GPS week: 0874   Day: 0   MJD: 50362.0

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

Table 3.0874.1   GPS week: 0874   Day: 1   MJD: 50363.0

               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   9   6   8   6   3  14   6    3 |    4   9   9  13   8   7  19   4    6
   2  |   5   5   8   6   5   4  10   5    2 |    8   9  14  11  12   7  14  14    8
   3  |   5   6   9   7   7   6   8   5    3 |    3   9  12  10  10   5  13   8    5
   4  |   4   5   4   5   5   3  12   7    2 |    3   7   7   8   6   5  13   8    4
   5  |   4   5   5   4   8   3   8   4    2 |    3   5   7   8   7   3  10   4    4
   6  |   5   7   9   6   5   5  12   4    3 |    4  11   9  10  10   4  13   6    6
   7  |   5   5   9   6   4   4   8   5    2 |    3   6   9  10   7   3  11   4    4
   9  |   5   9   7   5   4   4  13   8    3 |    5   8   8   8   7   4  17   7    4
  10  |   6   6   7   7   4 ---  13   6    3 |    3   9   9   9   5 ---  11   5    4
  14  |   4   4   4   6   3   2  11   4    2 |    2   5   6   4   5   4   9   3    3
  15  |   5   6  11   8   5   6   8   5    3 |    4   8  11  10  10   6  13   6    5
  16  |   4   4   6   5   4   3   8   7    2 |    3   5   8   6   4   4   9   5    2
  17  |   6   5   5   8   8   4   8   5    2 |    4   7   8   8   9   5  12   8    5
  18  |   3   5   6   5   6   3  12   6    2 |    3   9   8   9   8   4  12   9    5
  19  |   5   8   6   7   8   5  15   4    3 |    4  11   5  10   9   4  13   6    5
  21  |  12  27  22 ---  15 --- --- ---   15 |   21  54  17 ---  33 --- --- ---   29
  22  |   4   4   8   5   6   4   9   6    2 |    4   6   9   7   7   4  12   5    3
  23  |   8   4   7   8   9   5  21   6    3 |    8   6  13   7   8   6  13   6    5
  24  |   4   4   4   5   6   3   8   5    2 |    3   6   9   8   7   3  11   4    3
  25  |   5   7  15   6   7   5   9   5    3 |    5  10   9  11  10   9  13   5    7
  26  |   6   5  11   7   4   3  13   5    3 |    3   6  11  10   7   4  16   5    4
  27  |   4   9   5   7   5   5  11   4    2 |    3   9  10   8   7   3  12   4    4
  28  |   5   6   5   6   7   4  10   6    2 |    4   8  10  10   8   4  15   5    5
  29  |   3   6   9   4   4   3   9   5    2 |    4  11  11  10   8   5  12   4    6
  30  |  13  14  13  10   8 ---  31   9    6 |   15  21  19  23  19 ---  30  16   18
  31  |   5   5   7   7   8   4  10   5    2 |    3   7   8  11  10   4  12   4    4
------|--------------------------------------|--------------------------------------
 RMS  |   6   8   9   6   7   4  13   6      |T   6  13  10  10  10   4  13   6    8
 WRMS |   5   7   7   6   6   4  13   5      |NE  6  13  10  10  10   4  13   6    8
 MEDI |   5   6   7   6   6   4  10   5      |MD  4   8   9  10   8   4  13   5    5

Table 3.0874.2   GPS week: 0874   Day: 2   MJD: 50364.0

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

Table 3.0874.3   GPS week: 0874   Day: 3   MJD: 50365.0

               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  10  12   7   3   5  13   8    3 |    4  10  18  13   6   6  15   6    6
   2  |   5  10  11   5   5   6   9   7    3 |    8  14  12  11  12   6  17  14    8
   3  |   6   8   8   5   3   5   9   8    3 |    4   9  12   9   5   4  11   9    4
   4  |   5   6   8   5   7   4  16   8    3 |    5   8  10   8   8   4  12   7    4
   5  |   5   6   5   5   3   4  12   6    2 |    5   8  11   8   7   5  14   7    6
   6  |   5   5   7   8   3   5   9   7    3 |    4   8  12  12   7   4  13   7    5
   7  |   6   6  16   5   5   4  25  10    4 |    4   7   7   9   5   4  18  10    5
   9  |   4   6   5   5   4   6   9   5    2 |    6  10  15  10   6   4  14   7    5
  10  |   5   7   9   7   6 ---  10   5    3 |    4  10  14   8   9 ---  13   6    6
  14  |   7   7 ---   6  11   6   9   9    3 |   16  15 ---  15  12  13  19  17   15
  15  |   8   5  19   8   4   9   8   7    4 |    5  10  12   9   6   5  12   9    5
  16  |   4   6   7   6   3   3   5   9    2 |    5   5  13   8   5   5   8   9    4
  17  |   4   6   3   6   4   4  13   5    2 |    3   7  10   6   8   4  13   5    4
  18  |   5   6  20   5   7   5  27  13    4 |    3   7  16   8   7   4  20  10    5
  19  |  28  30 --- ---  96  32  52  23   16 |    0   0 --- ---   0   0   0   0  ---
  21  |   5  10   5   4   3   5  13   8    3 |    7  15  13   8  10   7   9   6    8
  22  |   5  11   5   5   5   5  17   6    3 |    5  14  10   8   9   4  14   6    5
  23  |   8  11   6   5   3   5  12   4    3 |   11  11  12   8   8   9   6   8    8
  24  |   4   5   6   5   5   4  14   5    2 |    3   6  13   7   5   4  13   5    4
  25  |   6   9  15   6   4   6  15   9    3 |    6  11  18  11   8   5  17   8    6
  26  |   6  11   6   6   4   4  12   6    3 |    5  10  16  10   9   6  14   7    6
  27  |   4  12  11   7   7   5  15  17    4 |    3  13  13   9   8   4  16  17    4
  28  |   5   8   6   5   2   5  13   5    3 |    4  12  11  10   8   4  14   5    6
  29  |   3   8   6   4   4   6   9   5    2 |    3  10  16   7   6   5  12   7    5
  30  |   9  14   9   9   7 ---  17   9    5 |   17  21  21  25  22 ---  26  17   19
  31  |   5  11   9   6   4   4  14  10    3 |    3   7  17  11   6   5  15   9    5
------|--------------------------------------|--------------------------------------
 RMS  |   8  10  10   6  20   8  17   9      |T   6  10  13  10   8   5  14   9    7
 WRMS |   5   9   8   6   4   9  17   8      |NE  6  10  13  10   8   5  14   9    7
 MEDI |   5   8   8   5   4   5  13   8      |MD  5  10  13   9   8   5  14   7    5

Table 3.0874.4   GPS week: 0874   Day: 4   MJD: 50366.0

               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   5   6  20   6   4   5   6    3 |    3   6  16  23   6   7  14   8    7
   2  |   4   5   5   6   3   4   9   5    2 |   11  11  11  13  11  13  13  10   11
   3  |   4   6   8   5   3   4   7   6    2 |    4   8  12  11   4   6  12   4    6
   4  |   4   5   5   7   5   4  17   4    3 |    3   7  11   7   6   4  13   5    4
   5  |   4   6   7   5   3   5  11   3    2 |    4   8   9   9   7   4  15   5    4
   6  |   5   6   6   7   3   3   9   4    2 |    3   7  15  11   7   5  13   6    5
   7  |   4   8   9   6   5   4  15   4    3 |    2   8   7   8   5   4  12   4    4
   9  |   6   6   6  10   3   5  12   6    3 |    7  10  10  13   7   6  18   6    7
  10  |   4   5   7   6   3 ---   7   4    2 |    4   7  13   6   6 ---  11   6    4
  14  |   6   6  17   7   2   6   5   5    3 |   17  24  11  19  20  22  19  20   20
  15  |   4   5   8  10   1   7   9   3    3 |    3   8   7  10   5   7  10   5    5
  16  |   3   4   8   5   3   3  10   5    2 |    3   6  14   6   4   7  11   7    4
  17  |   4   5   7   7   2   3  12   5    2 |    4   7   8   7   5   5  15   7    4
  18  |   4   3  10   4   2   4  11   4    2 |    4   8  18   9   6   4  12   6    5
  19  |   6   7 ---   7   7   5  17   7    3 |    5  10 ---   9   7   6  14   5    5
  21  |   3   3   7   5   2   4   6   6    2 |    4   7  10  10   7   7  12   6    6
  22  |   4   5   6   5   3   3  12   5    2 |    4   7  12   7   5   4  13   5    4
  23  |   7   4   7   6   3   3  14   5    3 |   10   6  13   6   7   5   8   8    6
  24  |   2   4   3   7   4   4  11   4    2 |    3   6   9   8   6   5  13   4    3
  25  |   5   7   6   9   4   4  12   5    3 |    8  11  22  12  11   7  17  10    9
  26  |   4   5   8   6   3   4   8   7    2 |    4   7  11   9   6   4  12   8    4
  27  |   5   6   9   7   2   5  13   4    3 |    3   7  18   9   7   5  13   8    4
  28  |   4   6   7   7   3   4  11   5    2 |    3   7  11  11   6   6  13   4    4
  29  |   3   6   3   6   3   5   9   6    2 |    4   9  12  11   7   7  13   6    5
  30  |   8  11  13   9   3 ---  17   6    5 |   13  17  19  20  15 ---  23  14   14
  31  |   4   5   7   8   3   5   9   6    2 |    4   6  11  10   5   5  12   4    4
------|--------------------------------------|--------------------------------------
 RMS  |   5   6   8   8   3   4  11   5      |T   6   9  12  11   8   7  13   7    7
 WRMS |   4   6   7   7   3   4  11   5      |NE  6   9  12  11   8   7  13   7    7
 MEDI |   4   5   7   7   3   4  11   5      |MD  4   7  11  10   6   6  13   6    5

Table 3.0874.5   GPS week: 0874   Day: 5   MJD: 50367.0

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

Table 3.0874.6   GPS week: 0874   Day: 6   MJD: 50368.0

               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   5   5  10   4   4  11  10    3 |    5   7   6  10   6   5  13   8    5
   2  |   5   4   9   6   3   5  14   8    3 |   43  46  51  42  45  45  39  45   46
   3  |   4   7   8   5   5   4  21   9    3 |    6   9  10  11   7   8  17   8    7
   4  |   4   5   9   7   4   3  19   9    3 |    3   7   6   7   5   3  12   6    4
   5  |   3   5   9   5   5   4   8   6    2 |    4   8   9   9   7   4   9   8    5
   6  |   5   9  10   6   3   3  10   8    3 |    4  10   7   8   6   5  14  12    5
   7  |   4   6   5   6   5   4  14   6    2 |    3   7   7   8   6   4  11   6    5
   9  |  25   9  21   6   5   9  24  11    6 |   16  19  24  17  18  22  19  17   17
  10  |   5   6   8   8   4 ---  11   5    3 |    5   9   8   7   7 ---   9   6    5
  14  |   6   6   6   7   3   4  10   6    2 |   11  10   7  12   9   9  11  10   10
  15  |   6   5   7   8   3   7  12   7    3 |    8  10   8  12  10   9  14  10    9
  16  |   5   7   8   5   5   4  10   8    3 |    4   9   7   7   7   7   8   6    5
  17  |   5   5   6   6   3   4   8   8    2 |    5   8   4   9   8   6  10   7    6
  18  |   6 ---   8   5   6   3   9   6    3 |   11 ---  14  17  16  14  20  17   15
  19E |   5   7   7   7   4   5  11   8    3 |    7   9  11  12  10   7  14   6    7
  21  |   7   5   9   6   4   4  11  10    3 |    8  10  11  11   9   8  12   9    8
  22  |   4   9  10   7   3   4  14   6    3 |    5  10  11   9   7   4  13   6    5
  23  |  10   6   7   6   5   5  12   5    3 |   16   8  10   8  10   9   9  10    8
  24  |   3   5   6   5   6   6  12   9    2 |    3   7   5   6   5   7  11   7    4
  25  |   6   6  11   8   3   4  14   9    3 |   23  27  27  26  23  24  24  27   23
  26  |   5   4   8   7   4   3  16   8    3 |    5   6  11  11   7   5  16   6    5
  27  |   4   5   9   8   4   5  12   6    3 |    4   8   9  10   7   4  14   7    5
  28  |   3   6   6   6   3   5  12   6    2 |    4   9   8  10   8   5  14   4    5
  29  |   3   5   4   4   3   4  12   7    2 |    5   9   7   9   8   8  11   8    6
  30  |   8  14  10   9   4 ---  19   7    5 |   16  21  20  24  18 ---  28  15   18
  31  |  14   8  15  14   7   8  57  19    7 |   46  45  44  42  43  43  59  45   44
------|--------------------------------------|--------------------------------------
 RMS  |   8   7   9   7   4   5  17   8      |T  15  16  17  16  15  15  19  16   15
 WRMS |   5   7   8   7   4   5  17   8      |NE 15  17  17  16  15  15  19  16   15
 MEDI |   5   6   8   6   4   4  12   8      |MD  5   9   9  10   8   7  14   8    6

Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the initial coordinates for the Latitude,
         Longitude and Height components.  See Table 5 for the daily summary.

         CLK  - Satellite clocks used.
         EPO  - Mean number of satellite clock epochs available in the daily
                solutions.
	 U    - Station Used in centre's solution (at least one day).
         Units: centimetres.

Table 4.0874   GPS week: 0874   MJD: 50362.0-50368.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2482 |U  54   31   83 |U  43   32   79 |   33   22   63 |
emr | emr 2455 |   48   26   81 |   38   26   71 |U  25   13   50 |
esa | esa 1687 |   49   27   76 |U  38   24   66 |   31   19   58 |
gfz | gfz 1225 |   49   28   81 |U  33   24   58 |   25   14   53 |
igr | igr 2487 |   49   26   78 |   36   25   70 |   26   13   50 |
igs | igs 2491 |   49   26   78 |   36   25   70 |   26   14   51 |
jpl | jpl 2276 |U  50   28   81 |U  33   26   66 |   24   16   43 |

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 5.0874.0   GPS week: 0874   Day: 0   MJD: 50362.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   48   27   85 |   40   27   66 |   36   22   62 |
emr | emr 2495 |   40   23   72 |   28   17   45 |   27   14   50 |
esa | esa 1745 |   39   22   66 |   30   19   64 |   35   22   61 |
gfz | gfz 1247 |   44   23   88 |   28   18   42 |   33   15   51 |
igr | igr 2496 |   40   23   73 |   27   17   45 |   27   14   54 |
igs | igs 2496 |   39   21   69 |   27   17   48 |   28   15   52 |
jpl | jpl 2304 |   42   24   73 |   21   15   53 |   26   20   47 |

Table 5.0874.1   GPS week: 0874   Day: 1   MJD: 50363.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2460 |   45   30   96 |   42   32   87 |   31   26   64 |
emr | emr 2471 |   39   24   90 |   44   28   71 |   20   17   48 |
esa | esa 1614 |   37   22   89 |   46   23   68 |   28   21   62 |
gfz | gfz 1200 |   35   25  112 |   40   28   71 |   23   20   59 |
igr | igr 2478 |   39   24   90 |   40   28   71 |   23   17   51 |
igs | igs 2477 |   39   24   88 |   40   27   69 |   22   21   53 |
jpl | jpl 2208 |   43   23   89 |   46   28   78 |   21   19   50 |

Table 5.0874.2   GPS week: 0874   Day: 2   MJD: 50364.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2432 |   44   28   73 |   37   31   70 |   32   19   57 |
emr | emr 2483 |   45   28   86 |   36   28   94 |   23   12   44 |
esa | esa 1812 |   35   28   60 |   33   26   56 |   26   23   52 |
gfz | gfz 1196 |   36   23   61 |   17   25   42 |   24   13   56 |
igr | igr 2452 |   42   27   73 |   34   27   89 |   24   12   48 |
igs | igs 2484 |   43   26   82 |   34   30   92 |   24   13   47 |
jpl | jpl 2208 |   36   26   68 |   23   22   53 |   23   15   39 |

Table 5.0874.3   GPS week: 0874   Day: 3   MJD: 50365.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   53   27   78 |   41   32   76 |   32   22   68 |
emr | emr 2394 |   51   24   75 |   37   22   59 |   28   13   56 |
esa | esa 1894 |   54   23   73 |   48   23   66 |   33   19   63 |
gfz | gfz 1195 |   62   21   78 |   41   28   61 |   25   14   60 |
igr | igr 2496 |   51   21   73 |   32   23   56 |   27   13   52 |
igs | igs 2496 |   49   22   71 |   33   23   56 |   27   14   55 |
jpl | jpl 2304 |   52   23   86 |   31   25   59 |   24   20   46 |

Table 5.0874.4   GPS week: 0874   Day: 4   MJD: 50366.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   53   37   79 |   59   32   88 |   34   20   56 |
emr | emr 2468 |   43   31   80 |   50   23   75 |   28   12   43 |
esa | esa 1404 |   48   32   86 |   45   21   78 |   33   15   56 |
gfz | gfz 1247 |   53   36   86 |   45   22   76 |   22    9   40 |
igr | igr 2495 |   45   31   79 |   50   23   72 |   28   12   40 |
igs | igs 2495 |   45   31   76 |   51   24   73 |   26   12   44 |
jpl | jpl 2302 |   49   33   76 |   40   33   76 |   26   14   38 |

Table 5.0874.5   GPS week: 0874   Day: 5   MJD: 50367.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   73   36  100 |   38   30   79 |   32   22   64 |
emr | emr 2483 |   68   28   94 |   28   24   66 |   22   11   46 |
esa | esa 1729 |   68   28   92 |   25   22   54 |   25   13   53 |
gfz | gfz 1244 |   45   30   62 |   28   22   49 |   23   12   56 |
igr | igr 2496 |   69   27   93 |   27   22   65 |   22   11   47 |
igs | igs 2496 |   68   28   92 |   27   23   65 |   22   11   48 |
jpl | jpl 2303 |   70   31  108 |   28   24   49 |   22   12   41 |

Table 5.0874.6   GPS week: 0874   Day: 6   MJD: 50368.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   59   31   66 |   41   40   82 |   34   21   67 |
emr | emr 2389 |   45   26   66 |   35   32   80 |   27   14   61 |
esa | esa 1612 |   52   28   61 |   35   31   75 |   33   15   60 |
gfz | gfz 1247 |   63   33   65 |   26   22   57 |   25   13   47 |
igr | igr 2496 |   52   28   62 |   34   31   79 |   28   13   56 |
igs | igs 2496 |   52   28   60 |   34   31   75 |   28   13   57 |
jpl | jpl 2304 |   54   32   59 |   36   31   85 |   26   13   41 |

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