Subject: [IGSREPORT-2346] Wk 0835 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 22 Jan 1996 18:11:59 PST

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IGS Electronic Report    Mon Jan 22 18:11:59 PST 1996      Message Number 2346
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0835 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0835   (Jan 07, 1996 - Jan 13, 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 (IGS08357.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 are computed using a weighted average of all available centres 
(weights are those from the orbit combination). These values are supplemented 
with the current IERS Bulletin A UT1-UTC values. 

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

 IGS08350-6.SP3  IGS GPS ephemeris files for days 0-6, week 0835 in SP3 format.
 IGS08357.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08357.SUM    Complete report.

REMARKS on IGS Rapid Service 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:
   PRN12, PRN15 and PRN28 except on day 0 (Jan 07) when only PRN15 and PRN28
   were used since PRN12 exibited clock jumps up to 50 ns that corrupted
   the centre clock weights.

4. PRN20 was set unhealthy from 22:46 on day 4 (Jan 11) until 01:17 on day 6
   (Jan 13) (ref. NANU 014-96013). This explains the large clock RMS seen for
   NGS on day 5.

5. 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  
                 -------------+------+--------
                  1 (Jan 08)  | 24   | NGS,SIO (See Remark 7)

6. There was a maneuver of PRN24 on day 1 (Jan 08) (ref. NANU 005-96009).
   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 and the 
   combined solutions for PRN24 were excluded from the long arc evaluation on 
   day 1 due to unrealistic RMS caused by the maneuver.

** Note that EMR solution for PRN24 was included in the combination on day 1 
   (Jan 08) since it did not generate any orbit positions (0.000000 records)
   after 18:00 on that day. The maneuver on PRN24 occured around 20:00.

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
         ------------+----------+-----+------------------------------
          2 (Jan097) | 00:00:00 | 24  |   ALL    | Maneuver 
          5 (Jan 12) | 00:00:00 | 23  |   ALL    | Modeling problems

8. Centre specific UT1-UTC values for ESA were not used in the long arc 
   evaluation. Smaller RMS were obtained when UT1-UTC values from bulletin A
   were used.

9. Starting with GPS week 0834, long arc RMS for non-eclipsing satellites (NE)
   are now output below the total long arc RMS (T) (See Table 3).

10.Starting with GPS week 0834, the IGS combined orbits/clocks and all centres 
   providing both orbit and clock solutions are now further evaluated by an 
   independent point positioning (navigation) program. See COMBINATION
   STRATEGY AND ORBIT COMBINATION AND EVALUATION STATISTICS sections for more
   details. Tables 4 and 5 show the evaluation results.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08357.SUM).

Table 1: Week 0835 summary.                       (Jan 07, 1996 - Jan 13, 1996)

Table 1.0835.a   GPS week: 0835   MJD: 50089.0-50095.0

         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  59 | .00  .02  .01  -.21  -.17  -.33   .0  .06  .06 |    3.8   -2.0    1.8
        | .00  .00  .01   .08   .17   .19   .1           |    6.7    6.2
emr  25 | .01 -.03 -.01   .30  -.12   .35   .0  .11  .10 |   93.6   16.9    1.1
        | .01  .01  .00   .23   .18   .19   .1           |   32.2    7.4
esa  41 | .01 -.02 -.04   .46   .22   .14   .1  .16  .15 |   -2.0   -7.4   13.3
        | .01  .01  .01   .27   .37   .49   .2           |   16.6    6.5
gfz  41 |-.03 -.03 -.01   .07  -.05  -.12  -.3  .11  .11 |   96.7   17.4    7.9
        | .01  .01  .01   .08   .08   .18   .1           |   34.1   10.1
jpl  37 | .00  .02 -.01  -.13  -.05   .10   .2  .08  .08 |   96.0   16.7     .9
        | .01  .01  .01   .11   .09   .12   .1           |   32.3    7.3
ngs  42 | .02 -.02  .01   .29   .65   .18  -.110.53 7.36 |  -17.1   30.5  302.9
        | .01  .01  .01   .24   .25   .27   .1           |   50.6   86.5
sio  101|-.01  .03  .02  -.25  -.11  -.07   .210.54 7.64 |     .0     .0     .0
        | .01  .00  .01   .18   .05   .35   .1           |     .0     .0

Table 1.0835.b   GPS week : 0835   MJD: 50089.0-50095.0

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

              Day of GPS week
 PRN  |   0   1   2   3   4   5   6 |  Remarks
------|-----------------------------|------------------------------------------
   1  |   3   3   3   3   3   3   3 |
   2E |   5   4   4   4   3   3   3 |
   4  |   4   3   3   3   4   4   4 |
   5E |   4   3   3   3   4   4   3 |
   6  |   3   4   4   3   3   3   3 |
   7  |   3   3   3   3   3   3   4 |
   9  |   3   4   4   4   3   3   3 |
  12  |   3   3   3   3   3   3   4 | Low tracking on days 0-6.
  14  |   3   3   3   2   3   3   4 |
  15  |   4   4   4   3   3   4   4 |
  16  |   4   3   3   3   3   3   3 |
  17  |   4   5   4   3   4   4   4 |
  18  |   2   2   2   2   3   3   3 |
  19  |   3   3   3   2   3   3   3 |
  20E |   6   3   4   4   5   5   6 |
  21E |   4   3   3   3   5   5   5 |
  22E |   4   4   3   4   4   4   4 |
  23E |   4   2   5   4   5   6   4 |
  24  |   4   7   8   4   4   4   4 |
  25  |   3   3   2   3   4   3   4 |
  26  |   3   2   4   3   3   5   3 |
  27  |   2   3   3   3   3   3   3 |
  28  |   4   4   3   3   3   3   3 |
  29  |   2   2   3   2   2   2   3 |
  31  |   4   3   4   3   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 2.0835.0   GPS week: 0835   Day: 0   MJD: 50089.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  60 | .00  .02  .01  -.28  -.08  -.17   .0  .06  .05 |   -3.9    2.1    1.7
emr  27 |-.01 -.04 -.01   .52  -.14   .23  -.1  .10  .10 |   44.8   20.8     .9
esa  44 |-.01 -.03 -.04   .05   .21   .80   .1  .18  .15 |   21.0  -12.7   14.1
gfz  41 |-.03 -.03  .00   .06  -.01  -.39  -.2  .13  .12 |   45.9   27.9   10.0
jpl  37 | .01  .02 -.02   .02  -.18  -.03   .2  .08  .08 |   47.3   20.6     .8
ngs  42 | .02 -.03  .00   .21  1.04   .19   .1  .14  .14 |   -2.0    4.2   76.2
sio  98 |-.01  .03  .02  -.15  -.17  -.14   .1  .09  .09 |     .0     .0     .0

Table 2.0835.1   GPS week: 0835   Day: 1   MJD: 50090.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  59 | .01  .02  .01  -.26   .03  -.21   .1  .05  .05 |    8.1   -3.4    1.7
emr  25 | .00 -.03 -.02   .43  -.30   .14  -.2  .09  .09 |   62.4   24.1    1.0
esa  44 | .01 -.02 -.01   .31  -.17  -.56   .1  .16  .14 |   -9.5    -.7   14.0
gfz  42 |-.02 -.03 -.01   .09   .04  -.17  -.3  .09  .08 |   64.5   28.6    8.6
jpl  37 | .01  .03 -.02   .00  -.04   .05   .3  .09  .09 |   64.8   24.1     .7
ngs  41 | .03 -.03  .02   .30   .76   .13  -.127.8719.47 |   -3.0    7.4   75.6
sio  101|-.02  .02  .03  -.53  -.01   .51   .127.8820.22 |     .0     .0     .0

Table 2.0835.2   GPS week: 0835   Day: 2   MJD: 50091.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  57 | .00  .02  .02  -.30  -.24  -.35  -.1  .06  .05 |   10.3   -4.7    1.9
emr  25 | .00 -.04 -.01  -.03   .12   .64   .0  .11  .11 |   79.7   19.3    1.5
esa  40 | .00 -.03 -.03   .70   .12   .45   .2  .16  .14 |  -14.3   -8.2   14.3
gfz  41 |-.03 -.03 -.01   .13  -.10  -.29  -.4  .12  .12 |   77.7   24.9    6.1
jpl  37 | .00  .03 -.01  -.16  -.03   .24   .2  .07  .07 |   82.2   19.2    1.3
ngs  42 | .03 -.03  .01   .66   .45   .17  -.1  .12  .12 |    2.6   -3.1   76.1
sio  96 |-.01  .03  .01  -.16  -.11  -.50   .3  .09  .09 |     .0     .0     .0

Table 2.0835.3   GPS week: 0835   Day: 3   MJD: 50092.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  58 | .00  .02  .01  -.14  -.35  -.31   .1  .07  .05 |   12.2   -9.1    1.6
emr  25 | .01 -.03 -.01   .17   .01   .20  -.1  .10  .10 |  103.8    4.0    1.0
esa  43 | .01 -.02 -.05   .53   .02   .47   .0  .14  .15 |     .4  -19.0   17.3
gfz  41 |-.03 -.03  .00   .09  -.08   .00  -.3  .09  .09 |  110.2    2.5    6.8
jpl  37 | .01  .02 -.01  -.27   .05   .03   .2  .07  .07 |  106.1    4.0     .8
ngs  42 | .01 -.03  .01   .16   .79   .65  -.2  .11  .12 |    7.7   -9.7   76.5
sio  99 |-.01  .02  .01   .01  -.13  -.50   .2  .09  .08 |     .0     .0     .0

Table 2.0835.4   GPS week: 0835   Day: 4   MJD: 50093.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  59 | .00  .03  .00  -.15  -.29  -.62   .0  .07  .06 |    3.7   -8.3    1.6
emr  27 | .01 -.04 -.01   .19  -.20   .48   .0  .12  .11 |  109.3   15.9     .9
esa  40 | .01 -.03 -.05   .43   .80   .24  -.2  .14  .13 |   -9.1   -2.2   18.0
gfz  43 |-.03 -.02 -.01   .08  -.17  -.10  -.4  .10  .10 |  116.1   10.6    7.2
jpl  37 | .01  .02  .00  -.21   .05   .04   .2  .06  .06 |  111.7   15.9     .8
ngs  43 | .01 -.02 -.01   .58   .45   .33  -.1  .13  .15 |    6.0   -7.2   78.1
sio  106|-.02  .03  .03  -.35  -.11   .06   .3  .09  .09 |     .0     .0     .0

Table 2.0835.5   GPS week: 0835   Day: 5   MJD: 50094.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  61 | .00  .02  .00  -.11  -.31  -.54   .1  .08  .07 |     .5     .8    1.7
emr  24 | .01 -.02 -.01   .22   .00   .52   .1  .11  .11 |  123.4   10.7     .9
esa  40 | .01 -.03 -.05   .88   .64  -.09   .3  .19  .16 |  -21.9   -4.5    2.4
gfz  40 |-.02 -.03 -.01   .17  -.08   .11  -.2  .11  .10 |  125.3    9.9    6.8
jpl  37 | .00  .02  .00  -.16  -.03   .08   .2  .08  .08 |  125.9   10.1     .8
ngs  43 | .01 -.01  .01   .19   .32   .03  -.1  .11  .11 | -131.6  226.2  779.1
sio  102|-.02  .02  .02  -.38  -.14   .08   .0  .09  .08 |     .0     .0     .0

Table 2.0835.6   GPS week: 0835   Day: 6   MJD: 50095.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  58 | .00  .02  .01  -.23   .05  -.13   .1  .06  .06 |   -4.2    8.2    2.0
emr  25 | .01 -.03 -.01   .62  -.36   .26   .1  .10  .10 |  131.6   23.8    1.5
esa  39 | .02 -.01 -.05   .33  -.07  -.34   .3  .17  .14 |   19.4   -4.4    4.1
gfz  39 |-.02 -.01 -.01  -.10   .04  -.01  -.5  .15  .14 |  136.8   17.4    9.0
jpl  37 |-.01  .01 -.01  -.13  -.15   .29  -.1  .09  .09 |  134.2   23.1    1.3
ngs  41 | .02 -.02  .01  -.03   .71  -.25   .0  .11  .11 |     .6   -4.2   77.1
sio  103| .00  .03  .02  -.16  -.12   .02   .3  .11  .10 |     .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.

         Units: cm.

Table 3.0835.0   GPS week: 0835   Day: 0   MJD: 50089.0

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

Table 3.0835.1   GPS week: 0835   Day: 1   MJD: 50090.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz jpl ngs sio  IGS |  cod emr esa gfz jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1  |   6   5  12   5   4  19  11    3 |    2   7  12   5   4  14  13    4
   2E |   9   9  21  10   7  19  10    4 |    9  15  14  15  12  22  13   10
   4  |   5   8  16   8   7  12   9    3 |    4  11  16  13   7  12   8    7
   5E |   5  10  10  10   9  11   8    3 |    7  14  14  14   7  14   7    8
   6  |   4  19  13   7   8   8  12    4 |    8  27  17  13   8  14   7   10
   7  |   4  10  23   7   7  10   9    3 |    3  13  17  12   4  11  11    6
   9  |   5   6  36   6  12  11   8    4 |    5   7  12  10   5  13   6    4
  12  |   6   8  15   4  10  15   9    3 |    6   8  13   9   8  13  10    6
  14  |   4   7  10   6   8  10   9    3 |    5  12  16  12   6  14  11    7
  15  |   7   8  18  13  12  12   9    4 |    6  14  19  20   6  17   7    8
  16  |   4   6  13   8   7  19   9    3 |    4  11  15  13   8  20  11    6
  17  |   6  11  15   9   7  30  13    5 |    6  16  20  15   5  23   8    8
  18  |   3   5   7   5   7   9   7    2 |    5   8  10   7   8  11   6    4
  19  |   5  10  13  10   7  13   6    3 |    3  10  11   8   7  10   4    5
  20E |   3  10  13  12   8  16   8    3 |    5  16  16  15   5  12   8    6
  21  |   4   9  14   7   6   9   8    3 |    6  13  15  12   5  12   9    7
  22E |   4   5  15   8   8  18  15    4 |    6  11  21  11   6  22  13    6
  23  |   3   9  11   3   6  12   6    2 |   11  18  12  12  16  12  11   12
  24  | ---   7   8 --- --- >>> >>>    7 |  ---   8   0 --- ---  12   7  ---
  25  |   5   5   8   6  11  11  10    3 |    4   8  11   6  13  11  10    5
  26  |   6   7  10   7   7   8   5    2 |    5   7  14   9   7  11  11    4
  27  |   3   9  22   8   7  11   8    3 |    4  12  15   7   7  10   5    4
  28  |   5   9  11  10  11  17  11    4 |    4  14  16  13   5  13   9    5
  29  |   2   7   8   4   6  11   8    2 |    4   7  13   7   7  17   7    4
  31  |   5   9  16  10   8   7   7    3 |    5  14  15  13   6  12   6    6
------|----------------------------------|----------------------------------
 RMS  |   5   9  16   8   8 >>> >>>      |T   5  12  15  11   7  14   9    6
 WRMS |   5   9  13   8   8 >>> >>>      |NE  5  12  14  11   7  13   8    6

Table 3.0835.2   GPS week: 0835   Day: 2   MJD: 50091.0

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

Table 3.0835.3   GPS week: 0835   Day: 3   MJD: 50092.0

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

Table 3.0835.4   GPS week: 0835   Day: 4   MJD: 50093.0

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

Table 3.0835.5   GPS week: 0835   Day: 5   MJD: 50094.0

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

Table 3.0835.6   GPS week: 0835   Day: 6   MJD: 50095.0

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

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 4.0835   GPS week: 0835   MJD: 50089.0-50095.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2012 |U  59   37  103 |U  55   40  105 |   45   31   81 |
emr | emr 2360 |   54   37   96 |   38   35   78 |U  42   24   72 |
esa | esa 2014 |  419  269  826 |U 397  245  765 |  453  257  566 |
gfz | gfz 1193 |  252  139  445 |U 236  113  382 |  204  117  250 |
igs | igs 2396 |   47   33   84 |   48   39   91 |   39   22   68 |
jpl | jpl 2307 |U  42   28   72 |U  34   31   66 |   32   20   50 |

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 5.0835.0   GPS week: 0835   Day: 0   MJD: 50089.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2067 |   67   44  107 |   44   34  115 |   44   35   87 |
emr | emr 2372 |   52   43   97 |   31   31   81 |   43   23   68 |
esa | esa 2071 |  444  250  966 |  436  219  758 |  488  254  545 |
gfz | gfz 1200 |  314  202  603 |  327  144  474 |  252  156  295 |
igs | igs 2397 |   44   36   83 |   28   26   73 |   33   24   54 |
jpl | jpl 2330 |   45   31   85 |   26   26   65 |   40   26   54 |

Table 5.0835.1   GPS week: 0835   Day: 1   MJD: 50090.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1978 |   65   34  112 |   52   32   85 |   41   32   75 |
emr | emr 2350 |   63   38  103 |   41   32   77 |   37   23   68 |
esa | esa 2014 |  437  273  993 |  395  261  747 |  495  267  525 |
gfz | gfz 1152 |  389  200  641 |  240  117  441 |  266  145  254 |
igs | igs 2398 |   57   44   94 |   56   53   94 |   39   23   68 |
jpl | jpl 2167 |   40   26   66 |   35   23   63 |   28   22   50 |

Table 5.0835.2   GPS week: 0835   Day: 2   MJD: 50091.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1986 |   61   36  104 |   52   41  113 |   52   28   81 |
emr | emr 2366 |   56   35   94 |   36   35   94 |   40   26   75 |
esa | esa 2037 |  446  362  927 |  440  321  874 |  429  190  495 |
gfz | gfz 1200 |  258  144  508 |  286  118  442 |  164   88  186 |
igs | igs 2390 |   51   32  109 |   65   51  114 |   31   19   45 |
jpl | jpl 2247 |   50   28   75 |   33   28   76 |   32   20   47 |

Table 5.0835.3   GPS week: 0835   Day: 3   MJD: 50092.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2081 |   54   32   97 |   66   59  115 |   52   32   95 |
emr | emr 2360 |   48   28   96 |   45   56   98 |   44   25   72 |
esa | esa 2087 |  584  394  999 |  500  333  999 |  587  315  676 |
gfz | gfz 1200 |  170   92  237 |  208  112  323 |  164  101  219 |
igs | igs 2398 |   35   22   70 |   47   52   88 |   33   18   55 |
jpl | jpl 2381 |   38   24   69 |   47   54   86 |   34   21   52 |

Table 5.0835.4   GPS week: 0835   Day: 4   MJD: 50093.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2074 |   64   39  106 |   52   34   90 |   40   27   68 |
emr | emr 2370 |   54   37   97 |   33   27   60 |   39   22   70 |
esa | esa 2084 |  517  271  961 |  516  282  973 |  603  415  872 |
gfz | gfz 1200 |  208   96  322 |  194   80  331 |  197  111  234 |
igs | igs 2396 |   44   31   76 |   33   21   59 |   25   14   43 |
jpl | jpl 2378 |   39   28   72 |   32   18   54 |   28   16   45 |

Table 5.0835.5   GPS week: 0835   Day: 5   MJD: 50094.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1705 |   51   35  104 |   59   33  107 |   43   37   79 |
emr | emr 2332 |   54   37   94 |   37   27   68 |   44   23   71 |
esa | esa 1852 |  144   81  239 |   72   45  135 |   38   30   90 |
gfz | gfz 1200 |  149   84  304 |  182  101  293 |  196   97  270 |
igs | igs 2394 |   47   35   82 |   35   19   57 |   28   16   49 |
jpl | jpl 2258 |   36   24   64 |   30   18   57 |   28   17   50 |

Table 5.0835.6   GPS week: 0835   Day: 6   MJD: 50095.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2196 |   49   39   87 |   54   38  105 |   42   26   79 |
emr | emr 2373 |   49   36   90 |   43   28   61 |   48   24   81 |
esa | esa 1956 |  112   41  121 |  206   95  488 |  244  139  445 |
gfz | gfz 1200 |  188   97  321 |  171  110  328 |  165  106  277 |
igs | igs 2399 |   50   28   66 |   61   36  128 |   69   35  123 |
jpl | jpl 2390 |   42   33   72 |   33   31   54 |   33   14   51 |

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