Subject: [IGSREPORT-2909] Wk 0865 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Wed, 21 Aug 1996 6:35:26 PDT

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IGS Electronic Report    Wed Aug 21  6:35:26 PDT 1996      Message Number 2909
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0865 IGS Final Orbits

Final IGS Orbit Combination - Week 0865   (Aug 04, 1996 - Aug 10, 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 (IGS08657.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:

 IGS08650-6.SP3  IGS GPS ephemeris files for days 0-6, week 0865 in SP3 format.
 IGS08657.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08657.SUM    Complete report.

REMARKS on IGS Final Orbit Combination:

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

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

3. Centre clock weights were determined using the following non-SA satellites:
   PRN15 and PRN28.

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

                 Day  (Date)   |   PRN    | Centres 
                ---------------+----------+---------
                 0-2  (Aug 4-6)|   ALL    | ESA    

   Note that starting with week 860, Centres with clock RMS higher than 2 ns are
   excluded from the clock combination if they bias the combined clock solution.
   This will make IGS clock precision more comparable to the best ACs.

5. Higher orbit RMS for IGR on day 1 were mainly caused by PRN 3 and 16 
   (modeling problems identidied in the rapid combination: igr08651.sum).
   Higher orbit RMS for IGR on day 4 were mainly caused by PRN 16 and 18 
   (modeling problems identidied in the rapid combination: igr08654.sum).

   Higher clock RMS for IGR on day 1 were caused by the lack of redundancy in
   the clock combination. Only JPL and ESA submitted clock corrections at the
   time of the rapid combination.
 
6. Some 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.  The following table 
   lists the exclusions:

                     Day (Date)  | PRN  | Centres  
                    -------------+------+--------
                     0 (Aug 04)  |  16  | ESA,JPL (a)
                     1 (Aug 05)  |  16  | ESA           

   (a) Only 2 Acs submitted a solution for PRN16 on day 0 and both ACs disagree
       at the ~ 8-9 metre level. Consequently, PRN16 was deleted from the
       combination.

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

          Day (Date) |   TIME   |  PRN  | Centres  | Reason
         ------------+----------+-------+------------------------------
          3 (Aug 07) | 00:00:00 |  3,23 |   ALL    | Modeling problems (a)
          4 (Aug 08) | 00:00:00 | 10,14 |   ALL    | Modeling problems (b)
          5 (Aug 09) | 00:00:00 | 16,18 |   ALL    | Modeling problems (c,d)
          5 (Aug 09) | 00:00:00 |  19   |   ALL    | Modeling problems (e)

  (a) Due to unrealistic long arc RMS, PRN3 was excluded from the long arc
      evaluation on days 1-2 for ACs that submitted solutions for this 
      satellite;

  (b) Due to unrealistic long arc RMS, PRN14 was excluded from the long arc
      evaluation on days 2-4 for ACs that submitted solutions for this 
      satellite;

  (c) Due to unrealistic long arc RMS, PRN16 was excluded from the long arc
      evaluation on days 0 and 4 for ACs that submitted solutions for this 
      satellite;

  (d) Due to unrealistic long arc RMS, PRN18 was excluded from the long arc
      evaluation on day 4 for ACs that submitted solutions for this satellite;

  (e) Due to unrealistic long arc RMS, PRN19 was excluded from the long arc
      evaluation on day 5 for ACs that submitted solutions for this satellite;

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.

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

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

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

12.A new satellite, PRN10, was launched on Jul 16, 1996 (wk 0862 day 2) at
   00:50 UTC (ref. NANU 120-96204).  It was set active to users on wk 866/day 4
   (Aug 15, 1996) at 15:05 (ref. NANU 133-96228).

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08657.SUM).

Table 1: Week 0865 summary.                       (Aug 04, 1996 - Aug 10, 1996)

Table 1.0865.a   GPS week: 0865   MJD: 50299.0-50305.0

         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  76 | .00  .02  .00  -.09   .01   .16   .0  .08  .05 |   -4.5   -3.1    1.2
        | .00  .01  .00   .11   .09   .12   .1           |   10.7   16.6
emr  32 | .00  .01 -.01   .12   .06   .53   .1  .10  .08 |  100.0   31.5     .6
        | .01  .01  .01   .12   .09   .22   .1           |   74.1    4.6
esa  55 | .00  .00 -.01   .12  -.14   .10   .0  .11  .08 |    3.3    4.5    2.6
        | .00  .00  .01   .08   .14   .11   .1           |   12.3    5.3
gfz  47 | .00 -.02  .00   .14   .08  -.43  -.1  .07  .06 |  100.0   31.3     .5
        | .00  .00  .01   .09   .07   .14   .1           |   73.7    5.0
igr  n/a| .01  .00 -.01   .04  -.03  -.13   .0  .17  .07 |     .3    -.5    1.2
        | .01  .01  .01   .20   .15   .28   .1           |    1.5    3.1
jpl  37 | .00  .01  .00  -.19  -.13  -.12   .1  .10  .10 |  100.0   32.0     .5
        | .01  .00  .01   .11   .08   .16   .3           |   74.0    4.5
ngs  49 | .00 -.05 -.01  -.13   .05  -.27   .0  .18  .16 |     .0   -4.6   78.2
        | .01  .01  .01   .36   .33   .23   .1           |    2.2    8.0

Table 1.0865.b   GPS week : 0865   MJD: 50299.0-50305.0

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

              Day of GPS week
 PRN  |   0   1   2   3   4   5   6 |  Remarks
------|-----------------------------|------------------------------------------
   1  |   3   4   4   2   3   3   3 |
   2  |   3   3   4   3   4   4   3 |
   3E |   4   0  43   7   5   7   4 | Lack of data(day1).Modeling problems(day2)
   4  |   2   3   3   3   5   3   2 |
   5  |   3   3   4   3   3   2   3 |
   6E |   3   3   4   3   4   4   4 |
   7E |   3   3   3   3   3   3   3 |
   9  |   3   3   3   3   3   3   3 |
  10E | ---   0   0   0   0   0   0 | Not set active yet. See Remark #12.
  14E |   3   4   9   4  26   4   3 | Modeling problems on day 4.
  15  |   3   3   4   3   4   3   3 |
  16E | ---   6   7   5  27   5   4 | Modeling problems on days 0 and 4.
  17  |   2   3   3   2   3   2   2 |
  18  |   4   3   4   4  20   5   3 | Modeling problems on day 4.
  19  |   2   3   5   3   5  14   3 | Modeling problems on day 5.
  21E |   5   4   5   4   4   3   3 |
  22  |   3   3   4   4   4   3   3 |
  23E |   3   4   4   3   4   4   3 |
  24  |   3   3   3   3   4   3   3 |
  25  |   2   3   3   4   3   2   4 |
  26  |   4   5   4   3   5   3   3 |
  27  |   2   3   4   4   3   4   2 |
  28E |   3   5   4   3   3   3   3 |
  29  |   3   3   4   4   6   3   3 |
  31E |   3   4   4   5   4   4   4 |

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

Table 2.0865.0   GPS week: 0865   Day: 0   MJD: 50299.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  76 |-.01  .02  .00  -.06   .04   .05   .1  .05  .04 |   -8.3    2.5    1.3
emr  33 | .00  .00  .00   .25  -.01   .60   .0  .10  .09 | 2137.1   27.0     .6
esa  55 | .00  .01  .00  -.05   .04   .07   .2  .08  .07 |    2.6     .0    1.1
gfz  50 | .00 -.02  .01   .07   .04  -.19  -.1  .06  .05 | 2140.1   25.7     .5
igr  n/a| .00  .00 -.01   .09  -.19  -.14   .1  .06  .05 |     .9    -.6     .6
jpl  37 | .00  .01  .00  -.16  -.17   .09   .0  .05  .05 | 2138.9   27.1     .5
ngs  50 | .01 -.04  .01   .34   .18  -.46   .1  .12  .12 |     .3   -7.9   77.3

Table 2.0865.1   GPS week: 0865   Day: 1   MJD: 50300.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  76 | .00  .02  .00   .11   .09   .32   .1  .05  .05 |     .2  -17.2    1.1
emr  33 | .01  .00  .00   .07   .14   .22  -.1  .10  .08 | 2166.9   30.4     .5
esa  55 | .00  .00  .00   .08  -.21   .23   .0  .20  .08 |   -7.6   -3.2    4.4
gfz  46 | .00 -.03  .01   .05   .06  -.45  -.1  .08  .08 | 2168.9   30.0     .5
igr  n/a| .01  .02  .00  -.20  -.25   .09   .2  .33  .09 |    2.2   -4.4    2.4
jpl  37 | .00  .01  .00  -.26  -.28  -.14   .3  .06  .06 | 2168.2   30.9     .5
ngs  50 | .01 -.05 -.01   .14   .32  -.34  -.2  .12  .12 |    3.2  -12.8   77.6

Table 2.0865.2   GPS week: 0865   Day: 2   MJD: 50301.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  76 | .00  .01  .00  -.01  -.02   .06   .1  .08  .05 |  -16.9   20.3    1.1
emr  31 |-.01  .02  .00   .22   .12   .90   .2  .08  .07 | 2208.1   29.7     .6
esa  55 | .00  .01 -.01   .10  -.23   .03   .0  .10  .09 |  -14.2   13.5    5.0
gfz  45 | .00 -.02  .01   .10   .04  -.61  -.1  .09  .07 | 2209.9   29.4     .5
igr  n/a| .02  .00  .00  -.07  -.07  -.51  -.1  .11  .05 |    2.3   -4.1     .8
jpl  37 | .01  .00  .01  -.20  -.05  -.39  -.5  .10  .10 | 2208.3   30.6     .6
ngs  50 | .00 -.07 -.03  -.73   .11  -.60   .1  .22  .17 |   -1.0   -2.3   81.2

Table 2.0865.3   GPS week: 0865   Day: 3   MJD: 50302.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  75 | .00  .02  .00  -.15   .05   .04   .0  .06  .06 |    -.4  -17.5    1.3
emr  33 | .01  .01 -.01   .15   .12   .69   .2  .08  .08 | 2240.3   26.0     .5
esa  58 | .01  .00 -.01   .16  -.36   .03   .0  .11  .08 |   17.2    3.5     .7
gfz  48 | .00 -.03  .00   .31   .15  -.42  -.2  .07  .07 | 2242.1   25.9     .4
igr  n/a| .00  .01 -.01   .34   .04  -.09   .0  .07  .06 |     .2   -1.4     .6
jpl  37 | .00  .01 -.01  -.40  -.12  -.15   .3  .08  .08 | 2241.7   26.8     .5
ngs  50 | .00 -.04  .00   .12  -.16  -.09  -.1  .12  .12 |   -3.7     .6   78.3

Table 2.0865.4   GPS week: 0865   Day: 4   MJD: 50303.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02  .01  -.16  -.10   .09   .1  .14  .06 |    9.6  -20.7    1.3
emr  30 |-.01  .01  .00  -.11  -.01   .38   .0  .15  .11 | 2271.2   32.8     .6
esa  54 | .00  .01 -.02   .14  -.10   .19   .0  .08  .07 |   14.7    4.4     .9
gfz  45 | .00 -.02  .01   .20   .18  -.31  -.1  .06  .05 | 2273.2   32.9     .4
igr  n/a| .01 -.01  .00  -.15   .01  -.40  -.2  .25  .08 |   -1.3    3.1    1.2
jpl  37 | .01  .01  .00  -.15  -.12   .01   .2  .20  .20 | 2272.7   33.0     .6
ngs  50 |-.01 -.05 -.01  -.32  -.54  -.15   .1  .29  .23 |    -.8   -2.4   76.5

Table 2.0865.5   GPS week: 0865   Day: 5   MJD: 50304.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02  .00  -.19  -.11   .28  -.1  .09  .06 |    3.6   -4.8    1.2
emr  32 | .00  .00 -.01   .11   .16   .52  -.1  .08  .07 | 2310.4   38.2     .6
esa  53 | .01  .00 -.01   .21   .01  -.05  -.1  .11  .09 |   14.0    7.5     .9
gfz  48 | .00 -.02  .01   .09  -.01  -.53  -.1  .06  .06 | 2311.9   38.5     .4
igr  n/a| .00  .00 -.01   .03   .12  -.14  -.1  .09  .05 |    -.9    1.1     .7
jpl  37 |-.01  .02  .00  -.09  -.04  -.06   .4  .09  .09 | 2312.3   38.4     .5
ngs  49 |-.01 -.03 -.01  -.32  -.01   .06   .0  .20  .20 |     .1    7.8   78.1

Table 2.0865.6   GPS week: 0865   Day: 6   MJD: 50305.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  75 | .00  .02  .00  -.21   .10   .27   .2  .06  .05 |  -19.2   15.7    1.3
emr  31 | .00  .00 -.01   .13  -.08   .39   .2  .08  .07 | 2340.4   36.4     .5
esa  52 |-.01  .01 -.01   .16  -.14   .22   .2  .06  .06 |   -3.6    5.7     .7
gfz  45 |-.01 -.02 -.01   .16   .09  -.46  -.1  .07  .06 | 2342.0   36.5     .5
igr  n/a| .00  .00 -.01   .26   .16   .31  -.1  .11  .09 |   -1.0    2.9     .7
jpl  37 | .02  .01  .01  -.10  -.15  -.22  -.2  .05  .05 | 2340.9   37.0     .5
ngs  47 | .00 -.05  .00  -.16   .44  -.34   .1  .12  .12 |    1.6  -15.5   78.6

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 3.0865.0   GPS week: 0865   Day: 0   MJD: 50299.0

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

Table 3.0865.1   GPS week: 0865   Day: 1   MJD: 50300.0

               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   7   9   6  12    4 |    4  14   6  11   6   4  14    6
   2  |   4   9   6   9   5   6   8    3 |    5  12   6  12   6   6  12    6
   3E |   2 --- --- --- 129 --- ---    0 |    0 --- --- ---   0 --- ---  ---
   4  |   4  11   6   7   5   7  12    3 |    6  10  10   9   4   9  11    5
   5  |   3   8  10   5   6   3  10    3 |    5   7   7   8   6   7   9    5
   6  |   6  10   8   7   5   6   8    3 |    8  12   9  11   6  12  16    7
   7E |   6   7   7   6   7   5  10    3 |   11  12  12  13  10   9  19   11
   9  |   5   7  11   5   7   5   9    3 |    5  11   7   8   6   7   8    6
  10E |   2 --- --- ---  29 --- ---    0 |   53 --- --- ---  46 --- ---   52
  14E |  12  11   9   7   8   7  11    4 |    5  10   7   9   5   5  12    4
  15  |   6   6   6   8   5   4   9    3 |    5   7  10   8   8   5  10    5
  16E |   4  18  88 ---  89   6  14    6 |   22  15  32 ---  42  19  26   21
  17  |   5   8   7   4   6   5   9    3 |    6  10   7   8   6  10  10    6
  18  |   4   9   8   5   7   5  14    3 |    5  11  13  10   7   6  18    6
  19  |   5   6   7   9   5   5   9    3 |    5  12  10   8   8   5  12    6
  21E |   4  13   9   8  13   6  14    4 |    7  14   8  14  15   8  18    8
  22  |   4   8   6   7  11   8  13    3 |    5  11   8  11  11   7  18    7
  23E |   9   7   6   9   5   7  15    4 |   18  21  17  24  22  23  19   20
  24  |   4  10  10   6   7   5  11    3 |    4  11   6  10   6   8   9    4
  25  |   5   6   7   5   7   4  11    3 |    5   7   8   6   6   7   8    5
  26  |   8   7  12  17   6   5  12    5 |    5  13  10  16   7   9  14    8
  27  |   3   7   7   5   5   5   8    3 |    5  12  11  11   9   7  12    7
  28  |   5  21  13   7   7   7  18    5 |    7  24  18  12   8   6  19    9
  29  |   4   7   7  11   7   5  14    3 |    6  12   9  11   8   6  13    6
  31E |   5  13  13   6   6   6  17    4 |   13  18  26  17  15  12  21   15
------|----------------------------------|----------------------------------
 RMS  |   5  10  20   8  33   6  12      |T  13  13  12  11  15   9  15   13
 WRMS |   5   8   8   8   9   6  12      |NE  5  12   9  10   7   7  12    6
 MEDI |   5   8   7   7   7   5  11      |MD  5  12   9  11   8   7  13    6

Table 3.0865.2   GPS week: 0865   Day: 2   MJD: 50301.0

               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  10   7   4   8  11    4 |    4  10   5  12   7  12  15    7
   2  |   4  12  10   8   5  10   8    4 |    5  15   6  12   8  10  11    7
   3E |  24 --- --- ---  43 ---  78   43 |    0 --- --- ---   0 ---   0  ---
   4  |   3   4  10   3   6   9   7    3 |    5   8  10   7   9  10  10    6
   5  |   4   9  13   6   5   7  12    4 |    6  10   7  10   8   7  12    6
   6  |   6   7  16  10   5   8  11    4 |    8  12  17  12   8   9  16    8
   7E |   5   6   6   6   5   7  14    3 |    6   9   8  12  11  10  16    7
   9  |   4   4   6   7   4   8  10    3 |    7   9   8  10   8   7  12    8
  10E |   1 --- --- ---  13 --- ---    0 |   52 --- --- ---  45 --- ---   52
  14E |  13   9 --- ---  20  22  24    9 |    0   0 --- ---   0   0   0  ---
  15  |   6   5  11  11   5   8   9    4 |    5   8   9  10   7  12  12    6
  16E |   6   9  13 ---  11  14  36    7 |   31  30  32 ---  31  34  36   30
  17  |   2   7   5   6   4   8  11    3 |    6  10   5   7   5  13  10    7
  18  |   5   7  10  14   6   7  12    4 |    5   9  11  10   7   7  15    6
  19  |   4   8   7  10   5   8  33    5 |    8   8   8  12  10  14  37    9
  21E |   9   7  12  10   5   7  20    5 |   12  13  10  16  11  15  22   10
  22  |   7  13   8   7   6  11   9    4 |    5  16   6  10  10  13  15    9
  23E |  10   7  14  10   6   6  12    4 |   22  29  29  33  30  28  28   26
  24  |   3   6   6   6   4   8  12    3 |    4  12   6   7   8   9  12    6
  25  |   4   5   6   6   7   6   9    3 |    6   8   8   7   8   8  10    7
  26  |   4   5   9  13   5   9   8    4 |    6  11   9  12   9   9  14    8
  27  |   5   6  10  11   5   6  12    4 |    6   7   9  12  10  13  10    7
  28E |   7 ---   5   8   5  12  11    4 |    8 ---  10  13   9  16  16    9
  29  |   7   7   7   7   6   7  18    4 |    6   9   7   9   9   9  19    6
  31E |   9   7  13   9   5   9  14    4 |   12  19  18  14  14  12  20   15
------|----------------------------------|----------------------------------
 RMS  |   8   8  10   9  11  10  22      |T  14  13  12  12  15  14  18   15
 WRMS |   5   7   9   7   5  10  17      |NE  5  10   8  10   8  10  15    7
 MEDI |   5   7  10   8   5   8  12      |MD  6  10   9  12   9  11  15    7

Table 3.0865.3   GPS week: 0865   Day: 3   MJD: 50302.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   4   6   6   4   4   7   7    2 |    5  11   7   8   6   8  13    6
   2  |   3   6   8   7   5   5   8    3 |    6  10   8  10   6  13  12    7
   3E |   9  10  29   7  11  18  14    7 |   18  26  25  23  21  11  30   20
   4  |   4   7   5   7   4   7  12    3 |    5  12   9   9   8  10  14    7
   5  |   5   6   8   7   4   6   7    3 |    5   9   8   8   5  10  11    6
   6E |   5   7   5   6   5   9  11    3 |   10  13  12  10   7  11  14    9
   7E |   5   6   6   7   6   6  18    3 |    4   8   8  10   8   9  17    6
   9  |   5   6   7   6   6   5   7    3 |    8  10   9   8  10   8   9    8
  10  |   1 --- --- ---  20 --- ---    0 |   53 --- --- ---  47 --- ---   53
  14E |   5   8  16   6   7  10  11    4 |    0   0   0   0   0   0   0  ---
  15  |   7   5   9   5   4   5   9    3 |   10  10   7   8   7  11  10    8
  16E |   5  16  14  11   7  11  20    5 |   27  28  27   2  26  32  35   30
  17  |   3   6   7   5   5   6   8    2 |    4   7   8   9   6  11  10    6
  18  |   6   8   6  10   4   7  12    4 |    5  12   7  17   6   6  12    7
  19  |   3   7   8   6   5   5   7    3 |    6  10   8   9   7   7  12    6
  21E |   8   8  12  12   7   6  11    4 |    8  14  18  18  13  11  17   11
  22  |   7  12   6   7   8   7  11    4 |    6  13   8  12  12   9  14    7
  23E |   6   8   6   7   5   5   9    3 |   19  23  17  26  21  21  17   20
  24  |   3   9   6   6   4   7  10    3 |    4  11   8  10   8   9  10    6
  25  |  10   6  10   7   8   5  11    4 |   10   8  14   9   7  11  13    8
  26  |   6   4   8   8   5   6  12    3 |    6   6   8  13   9   8  12    7
  27  |   4  12  10  10   7   4   8    4 |    6  12   9  11   8   8  10    7
  28E |   5   7   8   6   5   7  12    3 |    7  13  12  11  10   9  16    9
  29  |   6   7   6   7   7   8  16    4 |    9  10  10  11   8  10  20    8
  31E |   8   8  16   7   7  10  21    5 |   16  18  18  18  18  13  17   15
------|----------------------------------|----------------------------------
 RMS  |   6   8  11   7   7   8  12      |T  14  13  12  12  14  12  16   15
 WRMS |   6   8   8   7   6   8  12      |NE 14  10   8  10  13   9  12   14
 MEDI |   5   7   8   7   5   7  11      |MD  7  11   9  10   8  10  13    8

Table 3.0865.4   GPS week: 0865   Day: 4   MJD: 50303.0

               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   6   7   4   5   5  12    3 |    6  11   8  10   9   6  12    6
   2  |   5   8   7 ---   8   5  15    4 |    6  12   9 ---  10   7  23    6
   3E |  13  11   9   6   7  13  18    5 |   13  17  17  16  13   9  29   13
   4  |   6  26   4   5  11   8  20    5 |    6  25   8   9   8   7  22    8
   5  |   8  12   7   4   6   6  12    3 |    6  12   8   9   9   8  13    6
   6E |   6  13   7   6   6  10  20    4 |   10  13  11  14  13  13  24   10
   7E |   7  13   8   6   7   6  10    3 |    8  12  11  11  14   7  21    8
   9  |   5   8   8   5   4   4  14    3 |    5   7   8  12   9   8  15    7
  10  |   2 --- --- ---  31 --- ---    0 |   39 --- --- ---  33 --- ---   40
  14E |  37  29 --- ---  29  46  86   26 |    0   0 --- ---   0   0   0  ---
  15  |   6  12   9   5   6   7  14    4 |    7  11   8   9   9   6  17    6
  16E |  39  34 --- ---  52  62  49   27 |    0   0 --- ---   0   0   0  ---
  17  |   6  10  10   3   6   6  11    3 |    4   8  11   9   6   5  14    7
  18  |  24 --- --- --- 102  47  60   20 |    0 --- --- ---   0   0   0  ---
  19  |  10  15  16   5   7   5  22    5 |    9  14  12   8   7   7  22    5
  21  |   8   6   9   9   6   8   8    4 |   11  11  13  17  14   8  17   11
  22  |   5  19   7   4   5   8  16    4 |    7  18  11  11  10   5  17    9
  23E |  10   9   7   6   6   7  14    4 |   26  30  25  35  32  29  32   29
  24  |   5  14   8   7   7   8  22    4 |    6  20   6   9   6   9  20    8
  25  |   4   9  11   4   6   6  14    3 |   10  13  10   8  10   8  11    8
  26  |  12   8   9   6   5   6  29    5 |    7   8  12  11  11   7  28    6
  27  |   5  11   7   5   7   5  12    3 |    9  10  10  10  10   6  14    7
  28E |   6   9   5   5   5   9  20    3 |    9  12  10  12  11   9  23    9
  29  |  10  24   5   5   5   6  33    6 |    9  19   8  10   7   7  35    6
  31E |   6   8   7   8   5   7  16    4 |    8  10  10  13  11   7  19    9
------|----------------------------------|----------------------------------
 RMS  |  14  15   8   6  25  20  29      |T  12  15  11  13  13   9  21   13
 WRMS |   6  11   7   5   8  20  23      |NE 11  14   9  10  11   6  19   12
 MEDI |   6  11   7   5   6   7  16      |MD  8  12  10  11  10   7  20    8

Table 3.0865.5   GPS week: 0865   Day: 5   MJD: 50304.0

               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   6   8   3   6   5  11    3 |    4   8   7   7   8   8  15    6
   2  |   5   7   8   8   2   7  17    4 |    4   8  10  11   8  10  16    7
   3E |  13   8  11   8   5  12  48    7 |   11  22  17  22  15  10  47   17
   4  |   4   7   6   6   8   5  15    3 |    5  11   5  10  10  10  19    6
   5  |   6   6   5   4   3   5   9    2 |    5   9   8  12   9  11  14    7
   6E |   9   9   8   9   5   8  13    4 |   10  13   9  13  11  11  14    9
   7E |   5   6   8   5   4   6  12    3 |    4   9   8  10   8   9  14    7
   9  |   4   6   6   7   4   6  10    3 |    6   9   8  10   7   9  12    7
  10  |   2 --- --- ---  33 --- ---    0 |   38 --- --- ---  35 --- ---   38
  14  |   5   7  11   6   7   7  20    4 |    3   6   8  13   5   6  15    5
  15  |   6   5  14   4   4   5  14    3 |    6   7   6   9   9   7  15    6
  16  |   9   7  14 ---   8   7  22    5 |    8  11  14 ---  11  11  19    9
  17  |   3   6   9   4   5   4   9    2 |    5   8   5   7   5   9  11    5
  18  |  10  16  12   5   6   7  20    5 |    6  13  11   8  10   7  13    7
  19  |  27  12  24 ---  17  30  52   14 |    0   0   0 ---   0   0   0  ---
  21  |   5   6   5   5   6   5  15    3 |    8  10   9  14   9   9  14    9
  22  |  10   8  10   5   6   6  10    3 |    7  14   9  11   9   8  14    8
  23  |   8   5  20   5   5   5  10    4 |   36  32  24  33  34  34  28   32
  24  |   6   8   6   6   7   7  10    3 |    6  10   6   9   7  14  13    7
  25  |   5   6   8   4   4   4   8    2 |    7   8   9   8   8   9  12    6
  26  |   6   3   9   8   6   6  13    3 |    7   7  11  11  11   9  15    8
  27  |   5   7  11   7   4   4  23    4 |    7  10  10  11   9  10  25    8
  28E |   8   9   6   6   4   7   9    3 |   10  17  11  14  11   9  17   11
  29  |   6   6   9   4   6   5  20    3 |    4  10   9  10   6  10  17    5
  31E |   7  11   8   8   4   5  16    4 |   12  13  18  16  12  10  18   14
------|----------------------------------|----------------------------------
 RMS  |   9   8  11   6   9   9  20      |T  12  12  10  13  13  11  18   12
 WRMS |   6   7   9   6   5   9  20      |NE 12  11  10  12  13  11  16   13
 MEDI |   6   7   9   6   5   6  14      |MD  7  10   9  11   9   9  15    7

Table 3.0865.6   GPS week: 0865   Day: 6   MJD: 50305.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   3   8   7  11  21   6  12    3 |    6  10   8  15  15   8  11    7
   2  |   5   4   5   5   7   4  14    3 |    7   9   7  10  10   8  16    7
   3E |   9  11   9  11   7   7  12    4 |   10  17  15  20  13   9  17   13
   4  |   4   7   4   4   9   6  10    2 |    7  11   7  10  11  11  13    8
   5  |   5   7   5   8   7   5  10    3 |    6   8   8   9  11   8  12    7
   6E |   7  19   6   6  11   5  10    4 |    7  23  11  13  12   9  14   10
   7E |   6   6   5   4  10   6  11    3 |    6  12  11  11  16   8  16    8
   9  |   6   7   8   6   6   6   8    3 |    7   9  12  12  11  12  12   10
  10  |   3 --- --- ---  27 --- ---    0 |   34 --- --- ---  37 --- ---   34
  14  |   5   8   7 ---  15   5  11    3 |    4   6   7 ---   9   6  15    6
  15  |   6   6   5   5   7   4  12    3 |    6   8  10  10   7   8  13    8
  16  |   7   8   7 ---   7   4  13    4 |    5  11   6 ---   9   8  16    6
  17  |   3   4   5   5   5   5  10    2 |    5   7   9   8   9  12  10    7
  18  |   7   6   4   5  13   6  14    3 |    7  11  11  10  14   9  16    8
  19  |   4   6   4   5   7   4  13    3 |    8   9   9   8  10   8   7    9
  21  |   4   6   9   7  10   6  10    3 |    9  13  11  14  16  12  19   10
  22  |   8   8   5   4   8   4  10    3 |    5  13  12  10  13   9  14    9
  23  |   5   5   5   4   7   6  14    3 |   33  32  31  36  35  37  33   32
  24  |   4   7   7   9  11   6  10    3 |    7  10   6  12  12  11  10    8
  25  |   8   7   8   8  11   4  16    4 |   11  11   9  10  10  12  14   10
  26  |   4   5   7   6   9   4  10    3 |    8   7  10  12  12  10  12    8
  27  |   3   5   4   5   8   4  10    2 |    8   7  11  10  12  10  15    9
  28E |   5   7   5   6  10   6   9    3 |   10  13  14  16  12   8  17   12
  29  |   5   5   8   6  13   5  15    3 |    7   9  10  10   9   9  16    8
  31E |   6  10   7   9   9   7  19    4 |   12  17  16  15  17   9  22   14
------|----------------------------------|----------------------------------
 RMS  |   6   8   6   7  11   5  12      |T  11  13  11  14  15  11  15   12
 WRMS |   5   7   6   6   9   5  12      |NE 12  11  11  13  15  12  15   12
 MEDI |   5   7   6   6   9   5  11      |MD  7  11  10  11  12   9  15    8

Table 4: Precise Navigation Summary.

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

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

Table 4.0865   GPS week: 0865   MJD: 50299.0-50305.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2368 |U  50   33   78 |U  44   31   87 |   42   26   65 |
emr | emr 2146 |   43   29   65 |   34   22   70 |U  31   18   50 |
esa | esa 1898 |   73   80  131 |U  81   46  142 |  116   85  148 |
gfz | gfz 1049 |   54   33   68 |U  27   22   56 |   31   21   46 |
igr | igr 2345 |   44   31   73 |   37   24   79 |   52   40   85 |
igs | igs 2369 |   41   28   68 |   33   23   69 |   33   17   52 |
jpl | jpl 2255 |U  38   28   67 |U  31   20   67 |   32   18   49 |

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 5.0865.0   GPS week: 0865   Day: 0   MJD: 50299.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2208 |   65   41   69 |   37   31   73 |   31   28   65 |
emr | emr 2208 |   56   28   54 |   31   23   55 |   24   21   55 |
esa | esa 2034 |   40   21   53 |   30   20   55 |  214  178  171 |
gfz | gfz 1056 |   70   34   51 |   23   20   43 |   25   25   64 |
igr | igr 2207 |   57   28   51 |   28   20   52 |   23   22   55 |
igs | igs 2208 |   57   30   53 |   28   24   54 |   24   21   55 |
jpl | jpl 2288 |   42   22   60 |   25   20   48 |   27   18   54 |

Table 5.0865.1   GPS week: 0865   Day: 1   MJD: 50300.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2398 |   43   32   90 |   37   31   84 |   34   20   54 |
emr | emr 2015 |   48   30   69 |   28   28   77 |   26   16   42 |
esa | esa 1990 |  105  121  193 |  137   71  245 |  135   94  197 |
gfz | gfz 1056 |   49   34   64 |   28   28   75 |   27   16   40 |
igr | igr 2379 |   53   46  109 |   51   43  129 |  114   98  185 |
igs | igs 2399 |   36   28   84 |   27   28   75 |   21   14   39 |
jpl | jpl 2192 |   37   30   75 |   26   23   71 |   28   17   41 |

Table 5.0865.2   GPS week: 0865   Day: 2   MJD: 50301.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2376 |   51   35   74 |   61   34  102 |   44   26   59 |
emr | emr 2003 |   41   31   59 |   53   18   93 |   28   17   43 |
esa | esa 1708 |  137  165  249 |  150   84  243 |  159   92  270 |
gfz | gfz 1008 |   56   40   66 |   34   27   51 |   33   21   46 |
igr | igr 2380 |   46   28   59 |   51   21   88 |   24   14   40 |
igs | igs 2384 |   46   30   64 |   53   24   89 |   42   17   50 |
jpl | jpl 2169 |   44   34   60 |   51   19   95 |   30   19   40 |

Table 5.0865.3   GPS week: 0865   Day: 3   MJD: 50302.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2391 |   51   27   90 |   45   28   87 |   48   25   87 |
emr | emr 2303 |   35   23   73 |   35   19   65 |   44   14   78 |
esa | esa 2006 |   38   23   76 |   35   21   68 |   45   15   76 |
gfz | gfz 1152 |   36   24   66 |   36   18   68 |   26   10   38 |
igr | igr 2398 |   35   24   75 |   31   18   60 |   44   15   78 |
igs | igs 2391 |   37   23   76 |   31   21   65 |   44   14   77 |
jpl | jpl 2281 |   34   25   76 |   32   19   62 |   46   15   77 |

Table 5.0865.4   GPS week: 0865   Day: 4   MJD: 50303.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   40   35   74 |   42   37   94 |   42   28   74 |
emr | emr 1911 |   47   37   74 |   31   27   68 |   26   21   46 |
esa | esa 1640 |   45   32   60 |   32   28   76 |   24   18   48 |
gfz | gfz  960 |   65   37   86 |   22   18   48 |   25   24   43 |
igr | igr 2387 |   34   31   75 |   39   23   72 |   26   19   45 |
igs | igs 2400 |   32   28   67 |   30   25   73 |   28   18   51 |
jpl | jpl 2288 |   32   30   69 |   27   23   69 |   27   18   45 |

Table 5.0865.5   GPS week: 0865   Day: 5   MJD: 50304.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   49   30   75 |   48   27   89 |   49   25   54 |
emr | emr 2304 |   35   28   71 |   31   18   66 |   34   13   39 |
esa | esa 1933 |   34   27   69 |   28   24   60 |   36   17   45 |
gfz | gfz 1056 |   56   32   79 |   18   21   56 |   44   14   42 |
igr | igr 2398 |   35   28   71 |   28   17   64 |   34   14   38 |
igs | igs 2400 |   37   27   68 |   30   18   65 |   37   15   40 |
jpl | jpl 2284 |   34   27   69 |   28   17   61 |   34   15   39 |

Table 5.0865.6   GPS week: 0865   Day: 6   MJD: 50305.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   46   31   70 |   36   25   76 |   42   28   56 |
emr | emr 2280 |   37   24   55 |   22   17   56 |   28   20   37 |
esa | esa 1973 |   34   24   56 |   23   18   68 |   27   21   44 |
gfz | gfz 1056 |   35   26   57 |   19   14   46 |   30   28   44 |
igr | igr 2266 |   41   24   57 |   24   17   61 |   24   20   49 |
igs | igs 2400 |   35   24   56 |   21   17   59 |   27   21   38 |
jpl | jpl 2284 |   42   24   60 |   19   16   54 |   27   20   38 |

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