Subject: [IGSREPORT-3065] Wk 0873 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Wed, 16 Oct 1996 6:10:29 PDT

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IGS Electronic Report    Wed Oct 16  6:10:29 PDT 1996      Message Number 3065
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0873 IGS Final Orbits

Final IGS Orbit Combination - Week 0873   (Sep 29, 1996 - Oct 05, 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 (IGS08737.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:

 IGS08730-6.SP3  IGS GPS ephemeris files for days 0-6, week 0873 in SP3 format.
 IGS08737.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08737.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. There was a maneuver on PRN18 on day 2 (Oct 01) (ref. NANU 170-96275).
   The ESA solution which modeled the maneuver is provided for that satellite
   on that day as the combined solution. An associated accuracy code of 0
   (unknown) was given since there was no redundancy. The ESA, NGS and the 
   combined solutions for PRN18 were excluded from the long arc evaluation on 
   day 2 due to unrealistic RMS caused by the maneuver.

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

                  Day | Centre | PRN list
                  ----+--------+---------------
                   2  |  NGS   |  18

8. State vector resets were modeled for the following satellites to
   alleviate the effects of modelling problems, experienced by all centres,
   in the Long Arc (LA) process:

          Day (Date) |   TIME   |  PRN  | Centres  | Reason
         ------------+----------+-------+------------------------------
          2 (Oct 01) | 00:00:00 |  18   |   ALL    | Maneuver
          3 (Oct 02) | 00:00:00 |  14   |   ALL    | Modeling problems
          3 (Oct 02) | 00:00:00 |  19   |   ALL    | Modeling problems (a)
          4 (Oct 03) | 00:00:00 |  30   |   ALL    | Modeling problems
          5 (Oct 04) | 00:00:00 |  19   |   ALL    | Modeling problems

  (a) Due to unrealistic long arc RMS, PRN29 was excluded from the long arc
      evaluation on day 2 for ACs that submitted solutions for this satellite;

9. 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.

10.PRN30, launched on Sep 12 1996 (wk870/day 4) at 8:48 (ref NANU 162-96256),
   achieved initial usable status on wk873/day 2 (Oct 1, 1996) at 15:28 
   (ref. NANU 171-96275). For that reason, PRN30 should be used with caution
   on day 2.

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

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08737.SUM).

Table 1: Week 0873 summary.                       (Sep 29, 1996 - Oct 05, 1996)

Table 1.0873.a   GPS week: 0873   MJD: 50355.0-50361.0

         Mean and standard deviations of transformation parameters.
         WRMS - orbit RMS weighted by the SP3 header accuracy codes.
         STA  - Mean number of stations in the daily solutions.
         Units: meters, mas, ppb, nano-sec, nano-sec/day.

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .02  .00  -.22  -.04   .07  -.2  .07  .06 |    -.5   -2.6    1.2
        | .00  .00  .00   .12   .07   .18   .1           |    5.0    6.6
emr  32 | .00  .01  .00   .26  -.04   .26  -.1  .09  .08 |  339.8   20.8     .5
        | .00  .01  .00   .15   .10   .19   .1           |   54.2    4.3
esa  59 | .00  .01  .00   .15  -.06   .11   .3  .09  .07 |   -5.6   15.2    1.0
        | .00  .00  .01   .09   .25   .09   .1           |   16.0   10.7
gfz  53 | .00 -.02  .00   .04   .17  -.11  -.1  .05  .05 |  341.6   20.9     .4
        | .00  .00  .01   .07   .05   .07   .1           |   54.0    4.3
igr  n/a| .00  .00  .00  -.18  -.11  -.09   .1  .07  .05 |     .0    -.6     .6
        | .01  .01  .01   .18   .07   .07   .1           |     .7    1.5
jpl  37 | .00  .01  .00  -.22  -.13   .04   .3  .08  .07 |  341.4   20.8     .5
        | .00  .01  .01   .09   .06   .07   .1           |   54.2    4.3
ngs  50 | .00 -.04  .00   .09  -.11  -.34  -.114.3914.39 |   -1.7     .6   78.1
        | .01  .01  .01   .19   .21   .25   .1           |    6.0    7.7

Table 1.0873.b   GPS week : 0873   MJD: 50355.0-50361.0

         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   4   2   3   3 |
   2  |   3   2   2   2   3   3   3 |
   3  |   3   3   4   3   3   3   3 |
   4  |   3   3   3   3   3   3   3 |
   5  |   3   2   3   2   2   2   3 |
   6  |   3   4   4   4   3   3   4 |
   7  |   3   3   3   3   3   3   3 |
   9  |   3   3   3   3   2   3   3 |
  10  |   3   4   3   3   3   3   4 |
  14  |   6   4  12   3   2   2   2 | Modeling problems on day 2.
  15  |   4   3   3   3   2   3   3 |
  16  |   3   3   3   2   2   2  15 | Modeling problems on day 6.
  17  |   3   3   3   3   2   2   3 |
  18  |   3   6   0   5   6   5   6 | Maneuver on day 2.
  19  |   3   3   4   3   5   5   3 |
  21  |   5   2   3   2   2   2   2 |
  22  |   3   3   4   2   3   3   3 |
  23  |   3   3   3   3   3   3   3 |
  24  |   2   2   2   3   2   3   2 |
  25  |   3   4   4   3   3   2   3 |
  26  |   3   4   3   3   3   3   3 |
  27  |   3   4   4   3   2   4   3 |
  28  |   3   3   3   3   3   3   3 |
  29  |   4   9  16   3   4   2   2 | Modeling problems on day 2.
  30  | --- ---  17  10  11   9   9 | Modeling problems. See Remark 10.
  31  |   4   3   4   3   3   4   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 2.0873.0   GPS week: 0873   Day: 0   MJD: 50355.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02 -.01  -.36   .02  -.05  -.2  .06  .05 |   -8.2    8.6    1.2
emr  33 |-.01  .01  .00   .37  -.24   .35   .0  .10  .10 |  265.2   18.2     .6
esa  60 | .00  .02  .01   .32  -.08   .01   .4  .08  .07 |   -8.8    6.6     .8
gfz  55 | .01 -.02  .01   .01   .22  -.11  -.2  .06  .06 |  267.3   17.9     .4
igr  n/a|-.01  .02 -.01  -.36  -.10  -.07   .1  .07  .07 |    -.8   -1.1     .5
jpl  37 | .00  .00  .00  -.14  -.13   .13   .3  .06  .06 |  266.9   17.9     .5
ngs  50 | .00 -.04  .00   .14   .06  -.03  -.1  .12  .12 |  -10.0   11.8   76.9

Table 2.0873.1   GPS week: 0873   Day: 1   MJD: 50356.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  78 | .00  .02  .00  -.27  -.04   .30  -.2  .06  .06 |   -5.6   -6.5    1.3
emr  32 | .00  .01 -.01   .29  -.03  -.04   .0  .07  .07 |  287.3   19.2     .6
esa  60 | .00  .01  .01   .13   .15   .13   .2  .09  .07 |   13.2   15.0     .8
gfz  55 | .00 -.02  .00  -.08   .21  -.09  -.1  .06  .05 |  289.4   19.1     .5
igr  n/a| .00  .00  .00  -.02  -.08  -.12   .1  .06  .04 |     .5   -1.7     .6
jpl  37 | .00  .01  .02  -.25  -.22   .13   .5  .09  .10 |  288.9   19.3     .5
ngs  50 |-.01 -.04 -.01   .29  -.43  -.45  -.1  .11  .11 |   -1.9    -.3   78.0

Table 2.0873.2   GPS week: 0873   Day: 2   MJD: 50357.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 |-.01  .02  .00  -.30  -.18  -.11  -.2  .08  .06 |   -1.2   -4.8    1.3
emr  33 | .00  .01  .00   .45  -.04   .27   .0  .10  .08 |  311.4   25.9     .5
esa  60 |-.01  .01  .00   .19   .20   .09   .3  .08  .07 |  -25.7   19.1     .9
gfz  55 | .01 -.02  .00   .00   .11  -.09   .1  .05  .05 |  313.2   26.0     .4
igr  n/a| .00  .01  .00  -.03  -.05  -.01   .0  .11  .06 |    -.5     .9     .6
jpl  37 |-.01  .01  .00  -.20  -.15  -.05   .4  .12  .12 |  313.1   25.7     .5
ngs  50 | .01 -.03  .00  -.12  -.25  -.15  -.338.0838.08 |    -.8   -3.2   78.4

Table 2.0873.3   GPS week: 0873   Day: 3   MJD: 50358.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .01  .02  .00  -.03   .00  -.04  -.2  .06  .06 |    2.6   -3.6    1.3
emr  33 |-.01  .02 -.01  -.02   .02   .49  -.1  .10  .09 |  342.5   22.8     .5
esa  60 |-.01  .01  .01   .06  -.01  -.01   .1  .06  .06 |  -22.7   30.7    1.2
gfz  53 | .00 -.02  .01   .06   .11  -.01  -.2  .06  .06 |  344.2   23.1     .4
igr  n/a| .00  .00  .00  -.11  -.19  -.09   .1  .05  .04 |     .4   -1.0     .5
jpl  37 | .00  .02  .00  -.17  -.15   .05   .2  .05  .05 |  343.9   23.0     .5
ngs  49 | .00 -.04  .00   .04  -.04  -.51   .1  .13  .13 |   -5.7    6.5   78.5

Table 2.0873.4   GPS week: 0873   Day: 4   MJD: 50359.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .02  .00  -.09  -.02  -.10  -.2  .06  .05 |    5.8  -10.8    1.2
emr  33 |-.01  .00  .00   .25  -.04   .38  -.2  .09  .07 |  370.7   19.0     .6
esa  59 | .00  .01 -.01   .12   .06   .17   .2  .09  .07 |   14.3   15.2    1.3
gfz  50 | .00 -.02  .00   .07   .14  -.12  -.2  .05  .05 |  372.5   19.5     .5
igr  n/a| .01  .00 -.01  -.11  -.04  -.22   .1  .04  .04 |     .0     .1     .6
jpl  37 | .00  .01  .00  -.18  -.13   .00   .2  .05  .05 |  372.2   19.3     .5
ngs  50 | .00 -.04  .01  -.17  -.27  -.33   .1  .12  .12 |    -.4   -2.5   78.1

Table 2.0873.5   GPS week: 0873   Day: 5   MJD: 50360.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 |-.01  .02 -.01  -.22   .03   .19   .0  .06  .06 |    3.0   -4.8    1.3
emr  30 | .00  .00  .00   .23   .10   .03  -.2  .06  .06 |  393.3   14.4     .6
esa  57 | .00  .00  .00   .17  -.51   .11   .5  .09  .07 |    1.7   -2.3     .9
gfz  49 | .00 -.02  .00   .12   .18  -.17  -.2  .05  .05 |  395.1   14.7     .4
igr  n/a| .00  .00  .01  -.49  -.23  -.12   .0  .05  .05 |    1.1   -2.9     .6
jpl  37 | .00  .02  .00  -.41  -.11   .02   .2  .06  .06 |  394.9   14.4     .5
ngs  49 | .01 -.05  .01   .13   .12  -.12   .0  .11  .11 |    9.7  -12.0   78.9

Table 2.0873.6   GPS week: 0873   Day: 6   MJD: 50361.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02  .00  -.31  -.07   .27  -.2  .08  .06 |    -.3    4.0    1.2
emr  31 | .00  .01  .00   .24  -.03   .34   .0  .08  .07 |  408.3   26.1     .5
esa  57 | .00  .01  .00   .06  -.26   .25   .3  .10  .07 |  -11.3   22.0    1.0
gfz  51 | .00 -.02 -.01   .09   .20  -.22  -.2  .05  .05 |  409.7   26.3     .4
igr  n/a| .01  .00  .00  -.13  -.06   .00   .1  .05  .04 |    -.6    1.5     .5
jpl  37 | .00  .02  .00  -.22  -.01   .02   .4  .08  .07 |  409.8   26.0     .5
ngs  50 | .00 -.06  .01   .34   .04  -.75  -.2  .13  .13 |   -2.7    3.9   78.1

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 3.0873.0   GPS week: 0873   Day: 0   MJD: 50355.0

               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   5   4   6  12    3 |    6   9   6  10   7   9  14    6
   2  |   6  11   6   6   9   6   9    3 |    5   7   8  11   8   8  11    5
   3  |   7   7   6   6   4   5  12    3 |    4  11   9  13   8   5  18    7
   4  |   6   6   6   5  10   4  11    3 |    7   6   6   7   7   6  13    4
   5  |   4   7   7   6   7   7   9    3 |    5   7   7   8   8   9  13    6
   6  |   7   8  10   8   7   5  11    3 |    5   9   9  11   9   6  13    6
   7  |   6   8   6   6   6   4   9    3 |    5   7   7  10   5   4  13    5
   9  |   4   7   6   5  12   6  11    3 |    5   9   8  11  11   8  12    7
  10  |   5   8   8   5   4 ---   9    3 |    5  10   9   9   7 ---   9    6
  14  |   9  15  14 ---  11  13  11    6 |   94  96   2 ---  88  90  87   91
  15  |   4  10  13   9   9   6   7    4 |    4   9   8   8   8   4  10    4
  16  |   4   8   6   5   5   6   8    3 |   12  11   7   7  11  12  12   11
  17  |   4   7   7   4   5   6  13    3 |    5   9   5   8   6   5  11    5
  18  |   6   9   7   7   5   4  13    3 |    3  10   7   9   5   2  10    4
  19  |   7   7   6   6   7   5  14    3 |    6  11   6  10  10   7  14    7
  21  |   5  27   9   6   6   6   8    5 |    6  23   9  10   8   8  11    8
  22  |   5   8   6   5   3   5  14    3 |    3   7   9   8   7   6  15    5
  23  |   8   8   7   4   6   6  15    3 |   14  13  13  11  11  12  10   11
  24  |   4   7   4   4  10   4  11    2 |    5   7   5   9   7   8  10    5
  25  |   4   5   5   5   9   5  18    3 |    6  10   9   9   7   8  21    8
  26  |   5   6   6   8   9   6  14    3 |    7   8  11  12  12   5  14    7
  27  |   5   7  13   5   6   5   9    3 |    7  12   7  11   8   7  15    7
  28  |   5   7   7   4   4   6  15    3 |    5   9   9  10   7   5  20    7
  29  |   6  12  12   6   6   4  11    4 |    3  12   8   2  10  12  10    4
  31  |   8   7  12   5   5   6  18    4 |    5   9   8  10   9   4  19    6
------|----------------------------------|----------------------------------
 RMS  |   6  10   8   6   7   6  12      |T  19  21   7   9  19  19  21   19
 WRMS |   5  10   7   6   7   6  12      |NE 19  21   7   9  19  19  21   19
 MEDI |   5   8   7   5   6   6  11      |MD  5   9   8  10   8   7  13    6

Table 3.0873.1   GPS week: 0873   Day: 1   MJD: 50356.0

               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   7   7   6   2   6   9    3 |    3   9   7  11   7   6  12    6
   2  |   5   6   4   5   2   5   6    2 |    3   7   7   7   5   8   8    4
   3  |   7   6   7   4   3   8  10    3 |    3  12  12  11   9   6  15    8
   4  |   6   9   6   5   3   7  16    3 |    5   6   6   6   4   8  18    4
   5  |   4   6   6   4   3   7   8    2 |    4   9   7   8   8   7  11    6
   6  |   6  10  12   6   8   6   9    4 |    4  10   8  10  12   6  13    6
   7  |   5   6   7   5   6   5  11    3 |    3   8   5   9   7   6  12    5
   9  |   6   8   9   5   5   6  13    3 |    5   9   8   9   7   5  14    5
  10  |   7  10   6   6   2 ---   8    4 |    5  10   7   5   5 ---   8    5
  14  |   6   5 ---   7  13  10   7    4 |  106 103 ---   1 104 106 108  105
  15  |   5   4   6   5   5   7  12    3 |    3   5   7   8   6   6  12    4
  16  |   6   5   6   6   5   7   8    3 |   11   8   6   5   8  12  10    8
  17  |   4   6  10   6   3   5  14    3 |    6   9   8   8   4   7  11    5
  18  |   9  16  19   5   9 ---  11    6 |    3  12  11   8   5 ---   9    5
  19  |   6   6   9   6   4   7   8    3 |    5  10   7  10   7   7  10    6
  21  |   5   6   4   4   4   6   6    2 |    4   7   5   7   5   6   9    5
  22  |   5   6   6   4   3   5  14    3 |    4   8   8   7   5   6  14    5
  23  |   7   6   5   4   3   5  13    3 |    9   8   8   8   7   7  14    7
  24  |   5   6   4   4   6   7   9    2 |    5   8   5   6   7   7  14    4
  25  |   7   5   9   6   7   8  16    4 |    6  12   9  12  10  11  23    9
  26  |   6   5   7  11   4   9   9    4 |    6   9  10  14  10   5  16    9
  27  |   5   7  18   5   4   7  12    4 |    4   9   5   8   8   9  11    5
  28  |   7   6   6   4   5   5  10    3 |    4   9   9   9   8   6  16    7
  29  |  12   8  15 ---  14  31   9    9 |    5  10   5 ---  18  40  10   13
  31  |   6   5   7   6   3   8   9    3 |    6  10  11  10   7   6  15    8
------|----------------------------------|----------------------------------
 RMS  |   6   7   9   6   6   9  11      |T  21  22   7   8  22  24  25   21
 WRMS |   6   7   7   5   4  10  11      |NE 21  22   7   8  22  24  25   21
 MEDI |   6   6   7   5   4   7   9      |MD  5   9   7   8   7   7  12    6

Table 3.0873.2   GPS week: 0873   Day: 2   MJD: 50357.0

               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   8   7   5   5   5  15    3 |    5   8   6  10   6   6  19    7
   2  |   4   8   6   4   5   6   5    2 |    4   8   6   8   8   7   8    7
   3  |   8   7  10   5   3   8  15    4 |    4   8  14  11   7   6  17    7
   4  |   6   6   5   6   3   8   9    3 |    5   7   6   7   5   7  12    7
   5  |   4   7   5   4   6   7  11    3 |    3  10   5   7   7   7  12    6
   6  |   6  11  11   5   4   8  10    4 |    4  10   9  10   7   7  11    7
   7  |   6   6   7   5   4   5   8    3 |    3   8   7   8   7   3  12    7
   9  |  10   6   7   5   6   6  10    3 |    6   8   9  13   7   6  14    6
  10  |   5   7   4   3   2 ---   9    3 |    7   8   8  10   8 ---  13    7
  14  |  15  19 --- ---  16  25  25   12 |   95  89 --- ---  96  97 107   95
  15  |   5   8   7   6   8   8  12    3 |    3   9   5   9  10  10  11    6
  16  |   6   6   6   5   4   5  11    3 |   10  10   7   8   9   7  10   10
  17  |   5   8   6   5   4   5   7    3 |    6  16   5  12  10   9  15    9
  18  | --- ---   2 --- --- --- >>>    0 |  --- ---   0 --- --- ---   0  ---
  19  |   6  12  11   7   5   9   9    4 |    7  18   8  12  11  10  13    9
  21  |   4   7   6   6   3   6   7    3 |    5   8   5   9   7   8   9    6
  22  |   7   9  11   5   6  12  11    4 |    4   9   9   8   7  12  12    6
  23  |   7   7   7   4   5   4  14    3 |   11  10   9  10   9  10   9    8
  24  |   4   6   4   3   4   7   7    2 |    4   8   7   7   6   5  10    5
  25  |   6   7  11   4   7   9  14    4 |    5  12   8  11   7  12  20   10
  26  |   6   9  10   6   4   6   9    3 |    5  13  10  10   7   6  12    8
  27  |   6   9  12   6   5   7  12    4 |    5  12   6  11  10   6  14    7
  28  |   6   8   5   4   3   7  13    3 |    4   8   8  10   6   7  17    7
  29  |  20  22 --- ---  46  35  39   16 |    0   0 --- ---   0   0   0  ---
  30  |  15  20 --- ---  19 --- ---   17 |   18  30 --- ---  27 --- ---   21
  31  |   7   6   8   6   7  11  14    4 |    5  10  14  12  13   9  16    9
------|----------------------------------|----------------------------------
 RMS  |   8  10   8   5  11  12 >>>      |T  20  21   8   9  21  22  25   21
 WRMS |   6   8   7   5   6  12 >>>      |NE 20  21   7   9  21  21  24   21
 MEDI |   6   8   7   5   5   7  11      |MD  5  10   8  10   7   7  12    7

Table 3.0873.3   GPS week: 0873   Day: 3   MJD: 50358.0

               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  12   6   7   4   5  23    4 |    5  10   7  13   6   4  25    8
   2  |   4   6   4   5   2   6   7    2 |    5   7   7   9   6   5   9    6
   3  |   6   7   7   5   2   6  10    3 |    5  10  11  10   7   5  16    7
   4  |   6   9   5   5   7   3  17    3 |    5   9   5   7   6   4  21    5
   5  |   3   6   5   4   5   4  13    2 |    5   8   8   8   8   5   9    5
   6  |   9   7  10  10   4   6  18    4 |    5  11   9  13   8   5  15    8
   7  |   4   8   8   6   4   4  11    3 |    5   9   8   9   6   5  13    6
   9  |   4  10   6   6   3   5   8    3 |    8  12   8  11   8   6  13    7
  10  |   7  11   6   3   8 ---   6    3 |    6   9  10   7  10 ---  11    6
  14  |   5   8   5   4   5   4  14    3 |    3   6   4   5   6   5   6    4
  15  |   6   6   7   7   4   7   9    3 |    4   8   6   6   4   4  11    4
  16  |   7   9   4   4   3   4   8    2 |   12   8   5   5   9  11  12    9
  17  |   3  10   6   7   1   4  10    3 |    5  11   6   9   6   7   9    6
  18  |   6  25   6   8   9   5  14    5 |   45  42  44  43  44  46  44   44
  19  |   4  12   5   6   3   5  12    3 |    9  14  13  11   8   9  15    9
  21  |   4   7   5   5   4   4   7    2 |    6   9   7  11   8   7   9    7
  22  |   4   5   6   4   4   5  11    2 |    3   6   8   8   6   6  13    5
  23  |   7   7   5   6   6   4  13    3 |   12  10  10  10  11  10   9    9
  24  |   6  11   5   6   4   6  13    3 |    4   9   5   8   6   6  15    5
  25  |   5  12   4   6   6   4  11    3 |    8  14  10  12   8   9  19    9
  26  |   5   8   7   4   3   5  16    3 |    7  12   9  12   9   6  17    8
  27  |   5  10   8   6   3   5  12    3 |    7  10   8   9   8   6  16    7
  28  |   7   7   7   4   4   6  12    3 |    5  10  10  10   9   7  15    7
  29  |   6  11 ---   5   3   3  15    3 |    2  10 ---  11   5   4   9    6
  30  |   9  12 --- ---  11 ---  26   10 |   19  29 --- ---  19 ---   7   22
  31  |   8   7   8   5   3   6  13    3 |    6  10  11  11   8   6  16    7
------|----------------------------------|----------------------------------
 RMS  |   6  10   6   6   5   5  13      |T  11  13  12  12  11  11  16   11
 WRMS |   6   9   6   6   4   5  13      |NE 11  13  12  12  11  11  16   11
 MEDI |   6   9   6   5   4   5  12      |MD  5  10   8  10   8   6  13    7

Table 3.0873.4   GPS week: 0873   Day: 4   MJD: 50359.0

               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   5   8   4   3   4   8    2 |    5  10   6  10   7   5  13    8
   2  |   4   8   6   6   3   5   9    3 |    5   8   6   9   8   4  10    7
   3  |   8   5   9   4   3   7  14    3 |    4  11  14  10  10   6  19    9
   4  |   5   7   7   7   3   4  10    3 |    3   8   6   8   6   4  10    7
   5  |   5   6   7   4   3   4  10    2 |    4   7   8   8   8   4  13    7
   6  |   6   8   8   5   5   3  15    3 |    5   9   8  11   9   7  16    9
   7  |   7   6   7   7   4   5   9    3 |    5   9   7  10   8   5  14    9
   9  |   4   7   5   4   3   5  10    2 |    7  11   8  11   7   6  15    8
  10  |   6   7   6   4   5 ---   7    3 |    5   9   7   7   8 ---  10    7
  14  |   4   8   6   4   2   3   5    2 |    2   7   7   5   5   4   6    3
  15  |   4   5   6   4   4   4   7    2 |    4   6   4   6   6   4  11    6
  16  |   6   4   5   5   3   3   9    2 |   18  14   6   6  13  17  15   15
  17  |   4   5   7   5   3   4   7    2 |    4   7   6   7   7   6  10    7
  18  |   6  27  11   6   7   7  15    6 |   53  53  50  54  57  55  56   52
  19  |   7   9  21   7   5   8  10    5 |    7  11  15  10   6   6  14    9
  21  |   4   6   5   4   3   4  11    2 |    5   8   8   7   7   4  14    7
  22  |   5   6   6   4   2   5  13    3 |    3   8   8   7   5   5  11    6
  23  |   5   6   7   4   2   3  13    3 |   10   9  11   7   8   9  13    9
  24  |   4   6   4   4   4   4   9    2 |    3   7   6   7   7   5  10    6
  25  |   5   7  11   6   4   4  14    3 |    9  11  14  11  11   9  14   11
  26  |   6   7   6   6   6   7  14    3 |    6  10   8   9   9   8  14    8
  27  |   4   7   6   4   3   4   9    2 |    7  10  10  10   8   7  14    8
  28  |   5   8   9   5   4   5  12    3 |    5   9  10   9  10   5  16    9
  29  |   4   7  22   7   3   3   8    4 |    2  10  19   9   6   3  11    5
  30  |  10  11 --- ---   8 ---  29   11 |   23  25 --- ---  27 ---  35   24
  31  |   5   6  13   4   4   7  11    3 |    5   9  13  10   9   6  13    8
------|----------------------------------|----------------------------------
 RMS  |   6   9   9   5   4   5  12      |T  12  14  13  13  14  12  18   13
 WRMS |   5   7   7   5   4   5  12      |NE 12  14  13  13  14  12  18   13
 MEDI |   5   7   7   4   3   4  10      |MD  5   9   8   9   8   6  14    8

Table 3.0873.5   GPS week: 0873   Day: 5   MJD: 50360.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   9   5   7   9   5   6   9    3 |    4  10   7  14   6   3  15    7
   2  |   5   6  10   6   4   5  10    3 |    5   9  10  10   6   4  10    6
   3  |   6   5   8   4   4   7   6    3 |    4   9  13   8  10   5  14    6
   4  |   8   5   7   7   4   5  14    3 |    5   7   8   7   6   5  13    5
   5  |   5   5   5   6   4   4   9    2 |    5   6   5   8   7   5  10    5
   6  |   6   6   8   7   2   5  11    3 |    4   8   8   9   9   4  13    6
   7  |   6   5  12   6   4   5  13    3 |    4   8   7   9   6   4  12    6
   9  |   5   6   7   5   8   5   8    3 |    8  10   8  11  10   7  15    8
  10  |   6   4   6   6   6 ---   8    3 |    4   9  10   6   7 ---  12    6
  14  |   5   5   8   4   3   4   4    2 |    2   5   8   7   7   5   7    4
  15  |   5   5   6   4   4   6  10    3 |    3   6   4   8   7   5  12    5
  16  |   5   4   6   4   7   4   8    2 |   24  19   6   6  16  21  19   20
  17  |   5   4   5   4   4   4   8    2 |    6   7   7   9   7   6   9    7
  18  |   7   6  27   5   6   8   9    5 |   79  78  52  78  80  80  81   75
  19  |   9  11 ---   5   6  10  12    5 |    2  10 ---   9   7   5  11    6
  21  |   4   5   6   5   3   5   9    2 |    3   8   5   9   6   4   9    5
  22  |   5   4   4   6   6   6  13    3 |    3   6   7   7   6   5  12    5
  23  |   6   5   4   4   5   4  12    3 |    8   9   8   6   9   7   7    7
  24  |   5   5   6   6   5   5   9    3 |    2   7   6   8   8   6  10    5
  25  |   6   5   4   5   8   5   9    2 |    9  10  14  10  11   7  15   10
  26  |   8   4   5   6   6   6  16    3 |    5   9   8  10  10   6  16    7
  27  |   7   8  12   7   6   7  11    4 |    9  14  12  12  11  10  18   11
  28  |   6   5   5   4   4   7   9    3 |    5   9   7   8   9   5  15    6
  29  |   6   5   4   3   4   6   8    2 |    2   8  10   9   6   7   9    6
  30  |  11   9 --- ---  10 ---  23    9 |   21  24 --- ---  24 ---  32   22
  31  |   7  11  14   6   5   8  11    4 |    6  11  12  11   8   5  15    7
------|----------------------------------|----------------------------------
 RMS  |   6   6   9   5   5   6  11      |T  17  18  13  17  18  17  21   16
 WRMS |   6   6   7   5   5   6  11      |NE 17  18  13  17  18  17  21   16
 MEDI |   6   5   6   5   5   5   9      |MD  5   9   8   9   8   5  13    6

Table 3.0873.6   GPS week: 0873   Day: 6   MJD: 50361.0

               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   7   7   4   8  10    3 |    5   9   6  13   8   5  16   10
   2  |   5   9   6   5   4   6   8    3 |    6   8   7   8   8   6  12    8
   3  |   6   6   8   4   3   5   8    3 |    6  11  14  11  11   7  13   10
   4  |   4   8   7   5   6   5  10    3 |    6   9   9   7   9   6  10    8
   5  |   5   7   5   6   3   4  13    3 |    5   6   7  10   8   6  16    8
   6  |   5   6  10   8   2   7  16    4 |    6  11   9  12  12   7  16   11
   7  |   8   6  11   6   3   6  10    3 |    6  10   8  11  10   7  15   10
   9  |   6   9   7   4   3   5   7    3 |    8  10  10  12  10   9  15   10
  10  |   8   9  13   4   6 ---  12    4 |    6  12  11  10  10 ---  15    9
  14  |   5   4   7   4   3   5   7    2 |    2   5   5   6   7   6  10    5
  15  |   5   5   9   4   3   8   8    3 |    4   7   7   8   8   5  12    7
  16  |  28  25 --- ---  14  22  36   15 |   72  59 --- ---  54  70  55   61
  17  |   5   5   3   6   3   7   9    3 |    8   9   9   9  10  10  14   10
  18  |   6   6  32   7   3   9  17    6 |   81  77  79  83  82  84  81   80
  19  |   6   8   8   5   7   8  12    3 |    2   9   3   9   7   4  11    5
  21  |   5   5   5   5   3   5   6    2 |    6  10   9  11  11   8  12    9
  22  |   3   5   7   5   4   6  11    3 |    4   7   7   8   6   6  11    6
  23  |   8   4   7   5   6   7  15    3 |   14  11  11  10  14  13   8   12
  24  |   5   4   5   4   3   4  10    2 |    4   8   5   7   8   5  13    8
  25  |   5   8  14   5   2   6  10    3 |    8  11   9  12   9  10  16   10
  26  |   8   6   3   6   5   6  11    3 |    7  10   8  11  13   6  17   10
  27  |   4   8   8   4   5   6  11    3 |    8  12  10  10  11   9  16    9
  28  |   5   7   7   4   2   6  10    3 |    6  10   9  10  10   6  17   10
  29  |   5   6   6   2   4   5  10    2 |    3  11   5   8   7   5  13    7
  30  |  10  10 --- ---   8 ---  20    9 |   18  22 --- ---  23 ---  34   21
  31  |   7   7   7   5   7   7  15    3 |    7  11  12  13  13   8  15   11
------|----------------------------------|----------------------------------
 RMS  |   8   8  10   5   5   8  13      |T  22  21  18  19  21  23  24   21
 WRMS |   6   7   7   5   4   7  13      |NE 22  21  18  19  21  23  24   21
 MEDI |   5   7   7   5   4   6  10      |MD  6  10   9  10  10   7  15   10

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 4.0873   GPS week: 0873   MJD: 50355.0-50361.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2452 |U  51   30   88 |U  43   31   83 |   36   24   60 |
emr | emr 2424 |   48   26   88 |   34   22   69 |   27   16   46 |
esa | esa 1737 |   42   25   74 |U  35   22   76 |   30   21   49 |
gfz | gfz 1158 |   40   26   94 |U  35   22   71 |   29   19   46 |
igr | igr 2443 |   44   26   87 |   34   22   70 |   26   17   43 |
igs | igs 2455 |   45   25   84 |   34   22   70 |   27   17   45 |
jpl | jpl 2276 |U  47   26   87 |U  34   22   67 |   26   19   45 |

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 5.0873.0   GPS week: 0873   Day: 0   MJD: 50355.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   51   28   66 |   55   35  104 |   34   28   65 |
emr | emr 2400 |   33   24   54 |   43   25   95 |   22   19   51 |
esa | esa 1952 |   26   21   47 |   51   27  104 |   32   24   53 |
gfz | gfz 1152 |   36   24   56 |   27   32  118 |   32   22   62 |
igr | igr 2388 |   28   23   54 |   45   25   97 |   22   19   50 |
igs | igs 2400 |   33   22   52 |   43   26   95 |   23   21   49 |
jpl | jpl 2304 |   34   24   52 |   42   23   91 |   20   20   51 |

Table 5.0873.1   GPS week: 0873   Day: 1   MJD: 50356.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2396 |   46   33   78 |   45   32   85 |   41   22   54 |
emr | emr 2400 |   39   26   78 |   39   23   64 |   26   15   42 |
esa | esa 1651 |   38   24   65 |   31   24   74 |   33   19   51 |
gfz | gfz 1151 |   44   28   77 |   38   22   69 |   28   17   42 |
igr | igr 2399 |   37   26   76 |   36   23   68 |   25   15   41 |
igs | igs 2400 |   38   25   74 |   36   23   65 |   27   14   40 |
jpl | jpl 2208 |   38   26   81 |   38   27   61 |   27   17   48 |

Table 5.0873.2   GPS week: 0873   Day: 2   MJD: 50357.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2387 |   60   27  112 |   35   30   78 |   32   24   56 |
emr | emr 2303 |   69   31  121 |   23   19   73 |   27   17   38 |
esa | esa 1487 |   41   27   68 |   25   16   57 |   28   15   44 |
gfz | gfz 1056 |   47   30  151 |   23   11   40 |   18    9   38 |
igr | igr 2399 |   54   30  120 |   23   19   78 |   27   15   38 |
igs | igs 2399 |   56   25  112 |   26   21   78 |   26   16   40 |
jpl | jpl 2208 |   57   28  117 |   23   15   65 |   25   21   44 |

Table 5.0873.3   GPS week: 0873   Day: 3   MJD: 50358.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   37   28   82 |   44   30   75 |   40   24   57 |
emr | emr 2399 |   36   23   73 |   36   23   61 |   34   16   44 |
esa | esa 1721 |   38   24   69 |   42   19   79 |   35   25   51 |
gfz | gfz 1200 |   28   23   76 |   45   22   61 |   42   18   39 |
igr | igr 2487 |   34   23   73 |   34   21   59 |   36   18   40 |
igs | igs 2496 |   33   22   70 |   36   21   61 |   34   19   38 |
jpl | jpl 2304 |   38   22   72 |   40   22   60 |   40   21   42 |

Table 5.0873.4   GPS week: 0873   Day: 4   MJD: 50359.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   48   28   70 |   38   27   73 |   30   21   62 |
emr | emr 2495 |   49   23   72 |   28   22   57 |   17   13   43 |
esa | esa 1732 |   48   24   70 |   28   19   67 |   22   16   47 |
gfz | gfz 1200 |   28   24   56 |   27   18   53 |   17   12   48 |
igr | igr 2491 |   48   25   72 |   27   19   56 |   17   13   45 |
igs | igs 2496 |   47   23   69 |   26   19   59 |   19   14   45 |
jpl | jpl 2303 |   50   24   73 |   26   19   56 |   18   15   48 |

Table 5.0873.5   GPS week: 0873   Day: 5   MJD: 50360.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   57   32  109 |   42   32   84 |   35   23   69 |
emr | emr 2475 |   52   26  109 |   28   24   64 |   30   12   60 |
esa | esa 2016 |   56   28  109 |   31   25   79 |   23   16   50 |
gfz | gfz 1196 |   45   26  115 |   28   23   65 |   24   13   41 |
igr | igr 2441 |   53   26  109 |   30   24   67 |   22   13   41 |
igs | igs 2496 |   53   28  106 |   28   23   64 |   26   14   60 |
jpl | jpl 2304 |   54   27  109 |   28   24   73 |   22   15   43 |

Table 5.0873.6   GPS week: 0873   Day: 6   MJD: 50361.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   56   31   90 |   40   28   78 |   39   26   53 |
emr | emr 2493 |   50   26   92 |   35   20   56 |   28   21   42 |
esa | esa 1603 |   41   25   79 |   28   20   63 |   32   27   46 |
gfz | gfz 1151 |   45   23   89 |   46   23   67 |   32   32   46 |
igr | igr 2495 |   49   26   86 |   37   21   57 |   28   21   44 |
igs | igs 2496 |   50   26   87 |   35   20   57 |   28   22   41 |
jpl | jpl 2304 |   49   28   89 |   37   20   56 |   27   25   39 |

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