Subject: [IGSREPORT-3330] Wk 0885 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 7 Jan 1997 13:33:59 PST

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IGS Electronic Report    Tue Jan  7 13:33:59 PST 1997      Message Number 3330
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0885 IGS Final Orbits

Final IGS Orbit Combination - Week 0885   (Dec 22, 1996 - Dec 28, 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 (IGS08857.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 and Springer, 1995, Combining the orbits of the IGS Analysis
   Centers, Bulletin Geodesique, 69, pp 200-222.

   Kouba, Mireault and Lahaye, 1995, 1994 IGS Orbit/Clock Combination and 
   Evaluation, Appendix I of the Analysis Coordinator Report, International GPS 
   Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.

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:

 IGS08850-6.SP3  IGS GPS ephemeris files for days 0-6, week 0885 in SP3 format.
 IGS08857.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08857.SUM    Complete report.

REMARKS on IGS Final Orbit Combination:

1. The centres used in the clock combination are COD, EMR, ESA, GFZ and JPL. The
   other centres are excluded because they either provide broadcast clocks (NGS)
   or clock corrections are not provided (SIO).  The clock information not
   used is still compared to combination for completeness.  
   The value of 999999.999999 microseconds, according to the sp3 format 
   convention, is used to signify that no clock solution is available and 
   therefore must not be used.

2. Only the GFZ "exact" clock corrections (one epoch out of two) are included
   in the combination and RMS computation (no "interpolation" values).

3. Rapid ("IGR") orbits/clocks are included in the combination for statistics
   only.

4. The following centre clock solutions, which provide broadcast clock
   corrections, were excluded from the combination but kept in the combination
   statistics:
            -> Centre: NGS 

5. Centre clock weights were determined using the following non-SA satellites:

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

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

                   Day  | Centre | PRN list
                  ------+--------+---------------
                  0,1,6 |  ESA   |  ALL

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

                  Day | Centre |  Time  |  Jump
                  ----+--------+--------+-------------
                   1  |  IGR   | ~00:15 | ~ -296 ns
                   1  |  JPL   | ~00:15 | ~ -295.6 ns

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

                  Day | Centre | PRN list
                  ----+--------+---------------
                  0-6 |  SIO   |  ALL (High rotations - see Table 2)

9. 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 (Dec 25) | 00:00:00 |  14   |   All    | Modeling problems (a)
          3 (Dec 25) | 00:00:00 |  23   |   All    | Modeling problems
          4 (Dec 26) | 00:00:00 |  19   |   All    | Modeling problems

  (a) Due to unrealistic long arc RMS, PRN14 was excluded from the long arc
      evaluation on day 6 for ACs that submitted solutions for this satellite;

10.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 (IGS08857.SUM).

Table 1: Week 0885 summary.                       (Dec 22, 1996 - Dec 28, 1996)

Table 1.0885.a   GPS week: 0885   MJD: 50439.0-50445.0

         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  83 | .00  .02  .00  -.38  -.12   .20  -.3  .07  .06 |    4.2    3.4    1.2
        | .00  .00  .00   .07   .08   .23   .1           |    8.8   15.4
emr  31 |-.01  .00  .00   .28   .03   .24  -.2  .09  .09 |  137.9   33.7     .6
        | .00  .01  .00   .12   .08   .26   .1           |   81.5   21.2
esa  57 | .00  .00  .00   .05   .07   .07   .2  .09  .07 |    1.0    9.6    3.5
        | .00  .01  .01   .11   .05   .13   .1           |   11.8   26.7
gfz  48 | .00 -.02  .00   .18   .04  -.26  -.1  .06  .06 |  137.2   38.3     .5
        | .00  .00  .00   .04   .10   .09   .1           |   84.8   11.2
igr  n/a| .01  .00  .00   .03   .06  -.06   .0  .06  .04 |   42.5     .1     .7
        | .00  .01  .00   .16   .08   .13   .1           |  111.1    4.8
jpl  37 | .00  .01  .00  -.13  -.01  -.08   .5  .07  .07 |  179.3   35.4     .6
        | .00  .00  .00   .05   .06   .09   .1           |   95.9   17.7
ngs  50 | .00 -.04  .00   .20   .09  -.15   .0  .14  .14 |    2.6    3.4   79.7
        | .01  .00  .01   .23   .12   .19   .1           |    4.9    9.5
sio  125| .00  .01  .03  1.69   .69  -.47   .9  .14  .08 |     .0     .0     .0
        | .00  .00  .00   .17   .23   .21   .4           |     .0     .0

Table 1.0885.b   GPS week : 0885   MJD: 50439.0-50445.0

         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   2   2   3   2   3   3 |
   2E |   6   4   4   4   4   4   4 |
   3  |   3   2   3   3   3   3   3 |
   4  |   2   3   3   4   3   3   3 |
   5E |   4   3   4   4   3   3   3 |
   6  |   3   3   3   3   4   3   3 |
   7  |   4   3   3   3   3   3   3 |
   9  |   3   3   4   3   3   3   3 |
  10  |   4   4   4   5   4   4   5 |
  14  |   3   3  20   4   3   5  14 | Modeling problems on days 2 and 6.
  15  |   3   3   4   3   3   3   3 |
  16  |   3   3   5   4   3   3   3 |
  17  |   3   3   3   3   4   3   3 |
  18  |   3   3   3   3   3   2   2 |
  19  |   2   2   2   9   4   3   3 |
  21  |   3   3   4   3   3   3   3 |
  22E |   6   4   4   4   4   4   4 |
  23  |   2   3   3   2   3   3   2 |
  24  |   3   3   3   3   3   3   3 |
  25  |   2   2   4   3   2   3   3 |
  26  |   3   3   3   3   3   2   2 |
  27  |   3   4   3   3   3   3   3 |
  29  |   3   3   5   3   3   3   3 |
  30E |   4   5   5   4   3   3   3 |
  31  |   3   3   2   4   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 2.0885.0   GPS week: 0885   Day: 0   MJD: 50439.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  83 | .01  .02  .00  -.37  -.03   .68  -.3  .06  .06 |  -13.0   28.7    1.0
emr  32 |-.01 -.01  .00   .36  -.06  -.20  -.3  .09  .09 |  269.3   53.2     .5
esa  58 | .00  .00  .00  -.05   .06  -.16   .2  .09  .07 |    2.1    1.8    3.7
gfz  50 | .00 -.02  .00   .18   .18  -.14  -.1  .06  .05 |  271.1   53.0     .4
igr  n/a| .00  .00  .00   .11  -.05  -.21  -.1  .04  .04 |    -.5     .4     .5
jpl  37 | .01  .01  .00  -.08  -.06  -.15   .5  .06  .06 |  270.7   53.2     .4
ngs  52 | .01 -.04  .01   .10  -.04  -.08   .2  .12  .13 |   -3.8   11.5   80.3
sio  129| .00  .01  .02  1.40   .26  -.38   .4  .08  .08 |     .0     .0     .0

Table 2.0885.1   GPS week: 0885   Day: 1   MJD: 50440.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  84 | .00  .02  .00  -.38  -.26   .13  -.3  .06  .06 |    4.8   -8.2    1.1
emr  33 |-.01 -.01  .00   .35   .08   .25  -.1  .08  .08 |   45.1  -10.6     .6
esa  58 | .00  .00  .00   .03   .04   .05   .1  .07  .07 |  -12.9  -25.2    6.8
gfz  52 | .00 -.03 -.01   .21   .11  -.29  -.1  .07  .06 |   30.6   20.3     .5
igr  n/a| .01  .00  .00   .05   .06  -.11   .0  .05  .05 |  294.5     .3     .7
jpl  37 | .00  .02  .00  -.14  -.02   .03   .4  .05  .05 |  326.5    -.4     .6
ngs  50 | .01 -.05  .00   .21   .32  -.18   .2  .13  .13 |    7.6  -13.8   79.3
sio  128| .00  .01  .03  1.63   .52  -.62   .5  .09  .07 |     .0     .0     .0

Table 2.0885.2   GPS week: 0885   Day: 2   MJD: 50441.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  83 | .00  .03  .01  -.38  -.19   .07  -.2  .10  .07 |     .2   10.2    1.4
emr  29 |-.01 -.01  .00   .35   .16   .27  -.1  .09  .10 |   54.9   42.1     .6
esa  57 | .01  .00  .00  -.10  -.01   .21   .2  .08  .07 |  -16.3   24.4    1.5
gfz  46 | .00 -.02  .00   .16   .00  -.27  -.2  .06  .06 |   56.4   42.5     .5
igr  n/a| .01 -.01  .00   .11   .07  -.06  -.1  .09  .05 |   -1.4    4.8     .7
jpl  37 | .00  .01  .00  -.18   .03  -.20   .5  .11  .11 |   56.2   42.9     .6
ngs  48 | .01 -.05 -.02   .07   .12   .16  -.2  .17  .17 |   -2.0   12.2   80.4
sio  120| .00  .01  .03  1.66   .85  -.33   .7  .15  .09 |     .0     .0     .0

Table 2.0885.3   GPS week: 0885   Day: 3   MJD: 50442.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .03  .00  -.45  -.11  -.04  -.2  .06  .05 |    9.7   -1.7    1.3
emr  31 |-.02  .01  .00   .33   .07   .58  -.4  .08  .08 |   92.8   36.3     .8
esa  57 | .00  .00  .00   .10   .11   .21   .4  .14  .09 |   15.1   53.0    2.0
gfz  47 | .00 -.02  .00   .13  -.10  -.22  -.1  .06  .05 |   94.3   36.7     .7
igr  n/a| .01 -.01  .01   .22   .21   .18   .0  .05  .05 |    3.2   -5.9     .8
jpl  37 | .00  .01  .00  -.17   .10  -.04   .6  .07  .07 |   94.0   36.5     .8
ngs  50 | .00 -.04 -.01   .46   .09  -.15   .1  .15  .15 |    5.7    -.7   79.3
sio  118| .00  .01  .02  1.80   .71  -.10  1.3  .14  .11 |     .0     .0     .0

Table 2.0885.4   GPS week: 0885   Day: 4   MJD: 50443.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .02  .00  -.45  -.11   .10  -.3  .06  .06 |    8.3   -7.6    1.2
emr  31 |-.02  .01  .00   .33   .05   .46  -.2  .08  .08 |  132.9   28.1     .7
esa  55 | .01 -.01  .02   .21   .04   .00   .1  .09  .08 |   12.2   27.7    1.5
gfz  45 | .00 -.02  .00   .16   .12  -.42  -.2  .06  .06 |  134.1   28.7     .7
igr  n/a| .01  .01  .00   .06   .11   .02   .0  .03  .03 |    3.3   -5.6     .7
jpl  37 | .01  .02 -.01  -.06  -.08  -.06   .6  .06  .06 |  134.2   28.2     .7
ngs  49 | .00 -.04  .01  -.10   .10  -.46   .0  .12  .13 |    4.7     .1   78.6
sio  123| .00  .01  .03  1.94   .79  -.60  1.2  .09  .08 |     .0     .0     .0

Table 2.0885.5   GPS week: 0885   Day: 5   MJD: 50444.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .01  .02  .00  -.40  -.13   .18  -.3  .06  .06 |   14.5  -14.0    1.2
emr  29 |-.02 -.01  .01   .09  -.07   .06  -.2  .09  .09 |  168.5   38.4     .4
esa  56 | .00  .01  .01   .06   .11   .15   .1  .06  .06 |    5.1  -10.1    2.2
gfz  49 | .00 -.01  .00   .25  -.04  -.20  -.1  .06  .05 |  170.3   38.5     .4
igr  n/a| .01  .01  .01  -.30   .00  -.16   .2  .05  .05 |     .3    -.2     .7
jpl  37 | .00  .01  .01  -.18   .01  -.16   .5  .06  .06 |  169.9   38.7     .4
ngs  50 | .00 -.05 -.01   .56   .00  -.04  -.1  .12  .13 |    7.6    2.4   79.3
sio  126| .00  .01  .03  1.66   .94  -.65  1.1  .09  .08 |     .0     .0     .0

Table 2.0885.6   GPS week: 0885   Day: 6   MJD: 50445.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .02  .00  -.24  -.02   .25  -.2  .06  .05 |    5.0   16.2    1.0
emr  31 |-.02  .00  .01   .12   .00   .28  -.1  .10  .09 |  202.1   48.2     .5
esa  56 |-.01 -.01  .00   .13   .13   .05   .0  .07  .07 |    1.9   -4.1    3.7
gfz  47 | .00 -.02  .00   .18   .02  -.27  -.3  .06  .06 |  203.5   48.5     .4
igr  n/a| .00  .00  .00  -.03   .03  -.10  -.1  .07  .04 |   -1.9    7.2     .6
jpl  37 | .00  .02  .00  -.08  -.06   .04   .6  .05  .05 |  203.4   48.3     .4
ngs  49 |-.01 -.04  .00   .09   .02  -.27   .1  .13  .13 |   -1.6   12.3   80.8
sio  128| .00  .02  .02  1.74   .79  -.61  1.2  .25  .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 3.0885.0   GPS week: 0885   Day: 0   MJD: 50439.0

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

Table 3.0885.1   GPS week: 0885   Day: 1   MJD: 50440.0

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

Table 3.0885.2   GPS week: 0885   Day: 2   MJD: 50441.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4   7   5   5   3   6   9   9    2 |    3   7   8   7   6   4  13   7    5
   2E |   9  10   8   8   3   7  13   7    4 |    8  15  14  14  11   9  21  12   11
   3  |   5   5   7   4   3   7  14   9    3 |    3   8   9   7   6   6  14   6    5
   4  |   6   9   6   6   4   7  11   6    3 |    3  10  10  11   8   4  12  10    6
   5E |   8  11   9   6   3   8  13   9    4 |    6  13  20   9   9   6  16   7    7
   6  |   6   9   6   7   5   6  16   8    3 |    3   8   9  13  10   5  16   6    7
   7  |   6   7   7   4   3   5  12  11    3 |    3  11   6   9   7   4  17  11    6
   9  |   7  11   8   4   3   6  16  11    4 |    4   9   8   5   4   4  14   8    4
  10  |  10   6   6   6   2 ---  13  12    4 |    3  11  10  12  10 ---  20   6    9
  14  |  36   8 --- ---  43  46  36  60   20 |   15   6 --- ---  15  93  29  73   48
  15  |   9  13   7   7   5   7  15  12    4 |    4  18  11   9  10   5  15  10    7
  16  |   9  10  15   6   4   9  17  12    5 |    6  11  16  12  10   7  20  10    8
  17  |   7   6   5   6   7   5  17   9    3 |    3  10   8  10   8   5  16   7    6
  18  |   5   6   6   6   2   4  11   8    3 |    4   9   9   7   5   4   9   7    5
  19  |   5   8   5   5   4   4   8   9    2 |    4   9  13   9   6   5  13   7    6
  21  |   5  16   7   6   5   7  11   6    4 |    4  17   6   9   9   5  12   6    6
  22E |   7   8  10   8   4   6  23   8    4 |    6  10  22  11  10   5  28   7    9
  23  |   4   8   5   4   6   4  14   7    3 |   13  14   8   8  13  11  16  11   10
  24  |   6   9   7   7   3   6  13   8    3 |    4   8   6   9   6   5  16   7    4
  25  |   5  10   6   4   4   5  25   6    4 |    3   8   7   5   5   6  23   7    4
  26  |   5  10   6   5   2   3  10   8    3 |    7  11   9   6   9   5  13  10    8
  27  |   3   6   6   5   3   3  15   9    3 |    4   8   5   8   5   5  17   9    4
  29  |   5   8  10   8   3   8  28  15    5 |    5  15  15   8   9   5  28  10    8
  30E |  10  16  14   9   4  10  17  12    5 |    6  16  32  13  10   7  19   7    9
  31  |   6   8   5   3   3   4  10   9    2 |    4   9  11   6   5   3  15   9    4
------|--------------------------------------|--------------------------------------
 RMS  |  10   9   8   6   9  11  17  15      |T   5  11  12   9   8  19  18  16   11
 WRMS |   7  10   7   6   5  11  17   9      |NE  5  10   9   8   8  21  17  17   12
 MEDI |   6   8   7   6   3   6  14   9      |MD  4  10   9   9   9   5  16   7    6

Table 3.0885.3   GPS week: 0885   Day: 3   MJD: 50442.0

               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   5   6   4   4  13  12    3 |    3   7   7   6   6   4  12  10    4
   2E |   7  10  12   7   6   6  10   9    4 |   12  16  15  14  12  12  19  12   13
   3  |   5   6   6   6   4   8  14   9    3 |    4   5   8  10   8   4  16  10    5
   4  |   5  10  18   5   3   6  12  10    4 |    3  11  13  10   7   5  12   9    5
   5E |   7  10   7   5   3   6  22   9    4 |    8  13  10  12   9   7  18   9    8
   6  |   6   8   9   4   4   4  12  13    3 |    4  11  12  10  10   6  12  13    7
   7  |   4   9  11   6   5   5  15   9    3 |    3  10   6  10   8   6  17  10    6
   9  |   5   5   6   5   3   5  13  10    3 |    4  10   8  10   6   5  11  10    6
  10  |   7   5   8   6   5 ---  28  37    5 |    2  10   8  10   7 ---  21  33    7
  14  |   5   7  25   7  12   6  11  18    4 |    4   7  16  10  14   4  12  11    7
  15  |   5   6   7   5   7   6  12  10    3 |    3  10  11   8   9   4  16   9    5
  16  |   9  12   9   6   4   9  15  10    4 |    9  15  13  12  11   9  20  12    8
  17  |   6   5  11   5   5   5  12  10    3 |    4  10  12  11   9   5  15  10    7
  18  |   5   8  10   5   5   5  16  10    3 |    3  12  12  13   9   4  13  11    6
  19  |  10  11  45   9   6  23  13  27    9 |   10  11  41  14  10  21  13  17   12
  21  |   4   7   6   5   5   5  12   7    3 |    4  11   6  11   6   5  13   7    6
  22E |   6   8   8   7   7   6  18  10    4 |    7   8   8  13  11   5  15  11    7
  23  |   3   5   5   4   4   3  14   9    2 |   11  10  12  12  11  10  11  14   11
  24  |   5  10   9   5   4   6  10  11    3 |    3  11   9   8   7   5  11   9    5
  25  |   4   8   7   4   5   5  19   6    3 |    4   7   7   8   6   6  10   9    5
  26  |   4   6   8   6   3   4   7  10    3 |    6  10   8   9   8   6  15  12    7
  27  |   5   6  10   3   3   3  16  13    3 |    4  10  11   9   8   5  17  10    7
  29  |   5   4   8   4   4   4  19   9    3 |    5   8  11  10   8   6  17  10    7
  30E |   6  11   9   6   3   8  16   9    4 |    7  14  15  13  11   9  18   9    9
  31  |   5   5  18   4   6   6  16   5    4 |    5   9  14   7   9   4  17  10    6
------|--------------------------------------|--------------------------------------
 RMS  |   6   8  14   6   5   7  15  14      |T   5  10  13  10   9   7  15  12    7
 WRMS |   5   8   9   5   5   7  15  11      |NE  5   9  13  10   8   7  14  12    6
 MEDI |   5   8   9   5   4   6  14  10      |MD  4  10  11  10   9   5  15  10    7

Table 3.0885.4   GPS week: 0885   Day: 4   MJD: 50443.0

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

Table 3.0885.5   GPS week: 0885   Day: 5   MJD: 50444.0

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

Table 3.0885.6   GPS week: 0885   Day: 6   MJD: 50445.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4   8   6   6   4   5  13   9    3 |    3   5   9   8   8   6   7  11    5
   2E |   6  15  10   6   3   7  21  11    4 |   16  17  14  19  16  17  21  15   15
   3  |   5  10   4   5   3   5  13   7    3 |    4   7   6   9   6   5  13   7    5
   4  |   6   5   5   5   2   6   9   8    3 |    4  10   8   8   5   4  10   7    5
   5E |   5   8   6   7   4   5  12   7    3 |   10  11  11  11   9   9  13   8    9
   6  |   4  10   9   6   3   5   9   9    3 |    3  12   8   9   5   3  12   8    5
   7  |   6  10   7   6   6   6  14   8    3 |    4  12   6  11   6   5  15   7    5
   9  |   5   7   6   3   3   5  12   8    3 |    4   7   7   6   5   5  10   8    4
  10  |   7  11   9   9   3 ---  23   8    5 |    3  10   9  10   6 ---  13   8    6
  14  |  16  24 --- ---  29 ---  21 121   14 |    0   0 --- ---   0 ---   0   0  ---
  15  |   8   6   7   7   5   5  12   9    3 |    4  10   9   8   5   5  14   6    6
  16  |   6  10  12   5   9   4  10  10    3 |    9  12  10  11  12   8  14  11   10
  17  |   7   7   5   8   3   4   9   7    3 |    4  11   8  11   7   3  13   7    7
  18  |   3   6   5   5   2   3   9   6    2 |    4  10   9   7   7   5   9   7    6
  19  |   5   7   7   6   3   4   6   6    3 |    2   7   6   6   4   3   9   6    3
  21  |   4   7   7   7   5   5   9   9    3 |    4  10   6  11   7   6  13   5    5
  22E |   5  13   7  11   3   7  12   9    4 |    7  10  12  15   9   8  14   9    8
  23  |   4   6   4   4   4   4  12   9    2 |   18  19  18  19  20  18  14  14   17
  24  |   7   6   7   6   5   4  10   6    3 |    4   7   6   9   5   5  11   7    5
  25  |   4   5   3   4   3   4  17   6    3 |    5   8   9  10   8   9  10   9    6
  26  |   4   5   6   5   2   4   8   7    2 |    8  12   9   9   9   6  11  10    9
  27  |   4   6   8   3   2   3  16   7    3 |    5   4   8   8   5   8  18   9    5
  29  |   4   4   4   6   2   4  20   9    3 |    5   8   9   9   8   5  21  12    7
  30E |   5  11   7   7   2   6  13   8    3 |    8  12  12  10   9  10  17   9    9
  31  |   6  10   9   6   4   4  10   5    3 |    3   8   7   8   6   4  12   6    5
------|--------------------------------------|--------------------------------------
 RMS  |   6  10   7   6   7   5  13  25      |T   7  10   9  10   8   7  13   8    7
 WRMS |   5   9   7   6   4   5  13   8      |NE  5   9   8   9   7   6  12   8    6
 MEDI |   5   7   7   6   3   5  12   8      |MD  4  10   9   9   7   5  13   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 4.0885   GPS week: 0885   MJD: 50439.0-50445.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |U  51   34   77 |U  39   33   84 |   30   21   56 |
emr | emr 2338 |   40   27   68 |   34   26   76 |U  27   15   52 |
esa | esa 1837 |   46   26   74 |U  47   37  103 |   29   24   49 |
gfz | gfz 1173 |   43   27   71 |U  31   30   74 |   24   14   43 |
igr | igr 2395 |   39   28   67 |   31   28   69 |   25   14   52 |
igs | igs 2400 |   41   27   67 |   30   27   71 |   24   14   49 |
jpl | jpl 2260 |U  44   26   69 |U  32   30   71 |   24   14   47 |

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 5.0885.0   GPS week: 0885   Day: 0   MJD: 50439.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |    0    0    0 |   45   28  113 |   30   21   49 |
emr | emr 2400 |    0    0    0 |   40   25   96 |   24   14   43 |
esa | esa 1910 |    0    0    0 |   42   26   92 |   24   17   45 |
gfz | gfz 1193 |    0    0    0 |   46   23  106 |   25   12   47 |
igr | igr 2400 |    0    0    0 |   39   25   93 |   25   14   47 |
igs | igs 2400 |    0    0    0 |   39   25   99 |   25   14   44 |
jpl | jpl 2288 |    0    0    0 |   39   23   99 |   26   13   49 |

Table 5.0885.1   GPS week: 0885   Day: 1   MJD: 50440.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |    0    0    0 |   38   34   82 |   35   20   77 |
emr | emr 2207 |    0    0    0 |   44   28   78 |   41   20   77 |
esa | esa 1785 |    0    0    0 |   70   43  199 |   43   40   59 |
gfz | gfz 1162 |    0    0    0 |   21   21   64 |   26   12   37 |
igr | igr 2399 |    0    0    0 |   32   30   74 |   32   15   74 |
igs | igs 2400 |    0    0    0 |   32   28   74 |   32   13   73 |
jpl | jpl 2288 |    0    0    0 |   35   26   71 |   26   12   45 |

Table 5.0885.2   GPS week: 0885   Day: 2   MJD: 50441.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   54   35   71 |   42   31   76 |   37   23   55 |
emr | emr 2265 |   46   31   64 |   28   23   73 |   31   14   53 |
esa | esa 1225 |   44   28   74 |   62   51   87 |   38   30   60 |
gfz | gfz 1139 |   54   31   72 |   23   22   78 |   34   15   47 |
igr | igr 2393 |   43   30   64 |   27   25   67 |   28   13   56 |
igs | igs 2400 |   45   28   62 |   28   23   63 |   28   15   52 |
jpl | jpl 2287 |   46   28   65 |   28   21   65 |   26   14   54 |

Table 5.0885.3   GPS week: 0885   Day: 3   MJD: 50442.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   47   38   83 |   36   30   81 |   28   22   55 |
emr | emr 2397 |   34   30   78 |   27   26   60 |   22   12   49 |
esa | esa 2079 |   37   28   77 |   30   28   68 |   24   16   45 |
gfz | gfz 1193 |   37   28   75 |   28   28   62 |   21   11   46 |
igr | igr 2386 |   33   30   74 |   25   27   57 |   21   11   51 |
igs | igs 2400 |   35   30   74 |   25   25   61 |   20   13   43 |
jpl | jpl 2288 |   41   28   77 |   27   28   56 |   21   12   46 |

Table 5.0885.4   GPS week: 0885   Day: 4   MJD: 50443.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   50   31   79 |   35   39   70 |   28   21   53 |
emr | emr 2398 |   35   25   65 |   28   31   70 |   22   12   45 |
esa | esa 1979 |   50   24   75 |   31   33   62 |   21   16   41 |
gfz | gfz 1186 |   40   26   62 |   27   38   71 |   22   14   40 |
igr | igr 2399 |   35   26   64 |   27   31   66 |   24   13   46 |
igs | igs 2399 |   36   25   67 |   27   31   65 |   21   14   42 |
jpl | jpl 2287 |   36   24   64 |   26   41   65 |   22   11   46 |

Table 5.0885.5   GPS week: 0885   Day: 5   MJD: 50444.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |    0    0    0 |   42   34   87 |   25   23   53 |
emr | emr 2301 |    0    0    0 |   41   28   85 |   25   18   47 |
esa | esa 1925 |    0    0    0 |   44   43   68 |   20   18   49 |
gfz | gfz 1194 |    0    0    0 |   42   43   61 |   23   20   52 |
igr | igr 2395 |    0    0    0 |   38   32   59 |   22   16   46 |
igs | igs 2400 |    0    0    0 |   36   32   64 |   22   17   46 |
jpl | jpl 2191 |    0    0    0 |   40   42   59 |   23   19   48 |

Table 5.0885.6   GPS week: 0885   Day: 6   MJD: 50445.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   52   32   74 |   33   31   73 |   24   20   48 |
emr | emr 2395 |   45   23   65 |   24   23   65 |   19   13   38 |
esa | esa 1958 |   50   24   71 |   31   27   75 |   22   20   43 |
gfz | gfz 1143 |   41   22   74 |   24   25   66 |   16   13   32 |
igr | igr 2396 |   45   24   64 |   22   23   59 |   21   13   40 |
igs | igs 2399 |   46   25   65 |   23   24   63 |   19   14   38 |
jpl | jpl 2192 |   50   24   68 |   24   24   71 |   20   14   38 |

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