Subject: [IGSREPORT-2381] Wk 0837 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Sat, 3 Feb 1996 18:46:55 PST

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IGS Electronic Report    Sat Feb  3 18:46:55 PST 1996      Message Number 2381
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0837 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0837   (Jan 21, 1996 - Jan 27, 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 (IGS08377.SUM).

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:

 IGS08370-6.SP3  IGS GPS ephemeris files for days 0-6, week 0837 in SP3 format.
 IGS08377.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08377.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 on days 0,1 and 3 (Jan 21,22 and 24);
   PRN15 and PRN28 for days 2,4-6 (Jan 23,25-27) since PRN12 exhibited clock
   jumps up to 298 usec that corrupted the centre clock weights.

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

            Day (Date)  |   PRN    | Centres | Shifts/Outliers
           -------------+----------+---------+------------------
            0 (Jan 21)  | 16,18,19 |   ESA   | up to ~70 ns
                        | 21,22,24 |         |               
                        | 26,27,28 |         |               
                        | 29,31    |         |               
           -------------+----------+---------+------------------
            2 (Jan 23)  |   27     |   ESA   |  ~100 ns
            2 (Jan 23)  |   31     |   GFZ   |  ~50 ns

5. 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 (Jan 23) | 00:00:00 | 23  |   ALL    | Modeling problems

6. 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.

7. 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).

8. 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.

9. Starting with GPS week 0837, the igp orbits/clocks ("igp" standing for igs 
   preliminary combination) are now included in the rapid combination for 
   statitics only.  Note that the "igp" daily combination is performed on a 
   daily basis within 36 hours of last observation.
   
10.Large sigmas and RMS can be seen in all tables for igp on day 6 (Jan 27).
   This is due to data not available on time for the IGS preliminary 
   combination since JPL local network was down for that day.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08377.SUM).

Table 1: Week 0837 summary.                       (Jan 21, 1996 - Jan 27, 1996)

Table 1.0837.a   GPS week: 0837   MJD: 50103.0-50109.0

         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  65 | .00  .03 -.01  -.27   .10  -.25   .3  .07  .07 |    1.4    2.1    2.5
        | .01  .00  .01   .14   .13   .17   .1           |    8.6   12.4
emr  29 | .01 -.04 -.01   .37  -.21   .40  -.2  .10  .09 |  336.4   21.1    1.0
        | .01  .00  .01   .21   .10   .13   .2           |   39.7    5.5
esa  48 | .00 -.03 -.01   .21   .32  -.32   .2  .16  .13 |   15.0  -10.0    3.4
        | .01  .01  .01   .17   .25   .31   .1           |    7.2   12.3
gfz  44 |-.04 -.02  .00   .14  -.17  -.02  -.4  .10  .10 |  338.7   19.0    6.9
        | .00  .00  .00   .08   .07   .17   .1           |   40.4    7.9
igp  n/a| .01 -.02 -.02   .38  -.17   .06  -.2  .09  .08 |    1.3   -4.7    3.4
        | .01  .01  .01   .29   .11   .17   .1           |    4.5   15.6
jpl  37 | .01  .03  .00  -.25   .11  -.01   .2  .08  .08 |  336.6   21.6    1.0
        | .00  .00  .00   .05   .09   .10   .1           |   40.1    5.5
ngs  45 | .01 -.02  .01   .10   .22  -.02  -.2  .13  .14 | -687.5 1055.616728.9
        | .01  .01  .01   .15   .18   .19   .1           | 1831.1 2803.8
sio  112|-.01  .03  .02   .00  -.24   .05   .1  .09  .08 |     .0     .0     .0
        | .00  .00  .01   .13   .07   .14   .1           |     .0     .0

Table 1.0837.b   GPS week : 0837   MJD: 50103.0-50109.0

         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   2   3 |
   2  |   3   3   2   3   3   3   2 |
   4  |   3   3   3   4   3   3   3 |
   5  |   3   3   3   3   3   2   3 |
   6  |   3   2   3   3   3   3   3 |
   7  |   3   4   4   3   3   4   3 |
   9  |   3   3   3   3   3   2   2 |
  12  |   3   4   3   3   3   3   3 |
  14E |   4   4   4   4   4   3   4 |
  15  |   4   3   3   4   3   3   3 |
  16E |   3   4   4   5   4   4   5 |
  17  |   4   3   3   2   3   3   3 |
  18  |   3   2   2   3   2   2   2 |
  19  |   3   2   2   2   3   3   2 |
  20  |   3   4   3   3   3   3   3 |
  21E |   5   6   5   5   4   5   6 |
  22  |   4   3   3   3   3   3   4 |
  23E |   8  12   7   8  10  12  11 |
  24  |   3   3   3   3   3   3   3 |
  25  |   2   3   2   2   3   3   3 |
  26  |   4   3   3   3   2   3   3 |
  27  |   3   2   2   2   2   3   2 |
  28  |   3   3   4   3   4   4   4 |
  29  |   3   3   2   3   2   3   3 |
  31  |   4   4   3   4   3   3   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 2.0837.0   GPS week: 0837   Day: 0   MJD: 50103.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .03 -.01  -.48   .19  -.12   .5  .08  .07 |    6.1  -10.9    1.6
emr  29 | .01 -.05 -.01   .57  -.07   .24  -.3  .09  .08 |  283.4   11.1    1.0
esa  48 | .00 -.03 -.01   .22   .18  -.35   .1  .15  .13 |   14.0  -21.9    6.5
gfz  44 |-.04 -.02  .00   .07  -.21   .04  -.5  .11  .10 |  289.6    6.1    7.5
igp  n/a| .00 -.01  .00   .58  -.32   .19  -.2  .08  .07 |     .2   -2.3    1.1
jpl  37 | .01  .03  .00  -.18   .05  -.07   .1  .08  .08 |  283.4   11.3    1.0
ngs  47 | .01 -.02  .02  -.10   .08   .05   .0  .11  .11 |    2.9   -1.4   75.6
sio  106| .00  .04  .03   .07  -.11  -.03   .1  .10  .09 |     .0     .0     .0

Table 2.0837.1   GPS week: 0837   Day: 1   MJD: 50104.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .03  .00  -.41   .07  -.45   .2  .08  .07 |    3.1   -1.7    1.6
emr  31 | .01 -.04 -.01   .54  -.14   .35  -.1  .09  .08 |  294.0   27.3     .8
esa  49 | .01 -.02 -.02   .33   .18  -.62   .3  .16  .11 |   26.9   13.7    2.0
gfz  44 |-.04 -.02  .00   .10  -.21   .24  -.4  .10  .10 |  292.4   29.0    7.5
igp  n/a| .00 -.01  .00   .61  -.28  -.21  -.2  .06  .06 |    -.8     .3     .9
jpl  37 | .01  .03 -.01  -.23   .04  -.10   .2  .09  .09 |  294.0   27.6     .9
ngs  47 | .01 -.02  .01   .20   .43   .30  -.1  .13  .14 |    8.3   -8.5   77.6
sio  115|-.01  .03  .03  -.21  -.22   .22   .2  .10  .09 |     .0     .0     .0

Table 2.0837.2   GPS week: 0837   Day: 2   MJD: 50105.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .03 -.01  -.27   .18  -.39   .3  .07  .06 |    4.1    6.2    2.4
emr  31 | .01 -.05 -.01   .54  -.33   .57  -.3  .09  .08 |  319.3   23.1    1.3
esa  45 |-.01 -.04 -.01   .05   .10  -.24   .1  .17  .13 |   13.3  -17.7    4.3
gfz  45 |-.04 -.03  .00   .10  -.11  -.20  -.4  .11  .10 |  320.1   20.5    6.9
igp  n/a| .01 -.01 -.01   .45  -.16   .13  -.3  .06  .06 |    2.9   -2.2    1.2
jpl  37 | .02  .03  .00  -.24   .19  -.02   .2  .06  .06 |  319.3   23.9    1.2
ngs  42 | .00 -.03  .00   .08   .05  -.10  -.3  .11  .11 |-4840.0 7414.044260.0
sio  114| .00  .03  .02  -.09  -.28   .24   .3  .08  .07 |     .0     .0     .0

Table 2.0837.3   GPS week: 0837   Day: 3   MJD: 50106.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .01  .02 -.01  -.14   .21  -.44   .3  .07  .06 |    4.9   -2.2    2.9
emr  30 | .00 -.04 -.01   .33  -.27   .48   .1  .11  .11 |  341.8   17.4    1.0
esa  49 | .00 -.04  .01   .29   .26   .30   .0  .17  .13 |   20.9   -9.9    1.9
gfz  45 |-.04 -.02  .00   .08  -.03  -.01  -.2  .09  .08 |  342.5   15.2    6.5
igp  n/a| .01 -.03 -.02   .70  -.07   .12  -.2  .07  .07 |    -.2     .6    1.1
jpl  37 | .01  .03  .00  -.25   .01  -.03   .1  .08  .08 |  341.5   18.1    1.0
ngs  46 | .01 -.02  .01   .05   .05  -.05  -.2  .10  .10 |    1.4    2.9   76.6
sio  113| .00  .03  .01  -.08  -.24  -.06   .1  .10  .09 |     .0     .0     .0

Table 2.0837.4   GPS week: 0837   Day: 4   MJD: 50107.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .01  .02 -.02  -.14   .09  -.16   .3  .06  .06 |     .3    -.6    3.8
emr  29 | .01 -.04  .00   .21  -.25   .32  -.2  .09  .09 |  351.8   22.9    1.2
esa  50 | .00 -.03 -.03   .21   .72  -.59   .2  .15  .14 |   13.2   -2.3    2.0
gfz  45 |-.04 -.02  .00   .13  -.21   .11  -.6  .10  .10 |  353.3   22.3    6.3
igp  n/a| .00 -.01 -.02   .35  -.08   .28  -.1  .07  .07 |   10.5  -39.0    1.5
jpl  37 | .01  .03  .00  -.35   .14  -.08   .2  .08  .08 |  351.6   23.4    1.2
ngs  45 | .00 -.04  .02   .13   .18   .09  -.3  .16  .13 |    1.3   -3.8   76.8
sio  114|-.01  .03  .03   .11  -.29  -.02   .0  .09  .09 |     .0     .0     .0

Table 2.0837.5   GPS week: 0837   Day: 5   MJD: 50108.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .02 -.02  -.15   .14  -.03   .3  .09  .07 |  -17.1   27.8    1.9
emr  27 | .01 -.04  .00   .01  -.30   .57  -.4  .09  .09 |  374.5   20.2     .7
esa  50 | .00 -.03 -.02  -.06   .65  -.44   .3  .17  .13 |   12.7  -18.9    1.8
gfz  42 |-.03 -.03  .00   .28  -.21  -.24  -.3  .11  .11 |  380.0   13.8    7.1
igp  n/a| .01 -.02 -.01   .11  -.06  -.08  -.4  .08  .08 |     .4     .2    3.2
jpl  37 | .00  .03  .00  -.26   .05   .04   .2  .07  .07 |  375.5   20.8     .7
ngs  41 | .01 -.02  .01   .37   .36  -.25  -.1  .14  .19 |   10.8  -14.7  156.1
sio  110|-.01  .03  .02   .13  -.31  -.11   .0  .09  .08 |     .0     .0     .0

Table 2.0837.6   GPS week: 0837   Day: 6   MJD: 50109.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 |-.01  .03 -.01  -.32  -.18  -.19   .0  .07  .07 |    8.6   -3.9    2.5
emr  28 | .02 -.05 -.02   .36  -.14   .30  -.2  .11  .11 |  389.9   25.5    1.0
esa  47 |-.01 -.04 -.01   .44   .16  -.30   .2  .17  .12 |    3.9  -13.0    2.0
gfz  42 |-.03 -.02 -.01   .21  -.18  -.11  -.2  .10  .09 |  393.0   26.3    6.5
igp  n/a| .01 -.03 -.04  -.11  -.23  -.01  -.4  .18  .15 |   -3.6    9.3    8.1
jpl  37 | .01  .03  .01  -.24   .26   .19   .1  .07  .07 |  390.9   25.8    1.1
ngs  44 | .00 -.01  .02  -.02   .43  -.21  -.3  .13  .13 |    3.1     .8   80.0
sio  110| .00  .03  .02   .07  -.23   .10   .2  .09  .08 |     .0     .0     .0

Table 3: Daily fit for each satellite and each centre resulting from weighted
         average combination and from long arc orbit dynamics (7-day). The
         first IGS column gives resulting satellite accuracy measures found in
         SP3 header. The last IGS column gives the RMS fit of the IGS orbit
         when processed through the 7-day arc evaluation.

         "E" stands for  eclipsing satellites.
         "T" stands for Total long arc orbit RMS (all satellites).
         "NE" stands for Non-Eclipsing satellites long arc orbit RMS.

         Units: cm.

Table 3.0837.0   GPS week: 0837   Day: 0   MJD: 50103.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   8   4  11   8   8   6   8   5    3 |    5   8  15   9   7   6  11   9    8
   2  |   6   8  18   8   8   5  10   8    3 |    6  13  15  15  11   8  17   8    9
   4  |   4   6  10  10   6   7  11   8    3 |    6  12  20  14  12   9  15   6    9
   5  |   5   6   7   8   6   7   8  11    3 |    4  11  13  15   9   6  15   8    6
   6  |   6  10  10  10   4   7   8  10    3 |    6  14  13  14  11   7  14   7    8
   7  |  10   6   7   7  10   7  14   6    3 |    6  14  17  15  12   8  16   7   10
   9  |   5   8  11   6   9   6  10   8    3 |    8   9  11   8  10   9  12   6    7
  12  |   5  12   9   4   4   7  10   8    3 |    8   9  14  14   9  10  15  11    9
  14E |  10   7  19  12   7  10  10   6    4 |    7  16  20  17  11   7  15   7    9
  15  |   6   7  12  14   5   9  10  10    4 |    6  12  18  17  11   7  14   6    9
  16E |   7   7  12  13   6   8   7   8    3 |    9  13  18  14  10   7  14   8    8
  17  |   9   8  15  10   7   6  13  10    4 |    5  12  22  12  13   7  17   8    9
  18  |   7   6  10   7   3   6   9   6    3 |    6  10  14  11   7  12  10   6    7
  19  |   7   6  15   7   4   6   9  10    3 |    6   8  12  10   8  10  10   8    7
  20  |   5   6   8  11   4   8  13  11    3 |    4  11  14  16   8   7  18   8    7
  21E |   8   8  19  21  16  12  15  14    5 |   38  38  51  45  42  36  42  40   39
  22  |   6   7  18  10   8   7  10  11    4 |    6  11  15  13   9   6  20   6    8
  23E |  19  18  20 ---   5  16  19  14    8 |   30  44  31 ---  32  19  37  16   28
  24  |   4   7  19  11   7   5   8   7    3 |    6  11  21  12  11   6  13   6    7
  25  |   3   6  13   5  11   5   7   9    2 |    7  10  16   8   8   6  13   7    7
  26  |   6  11  24   7   5   8   6   8    4 |    7  12  14  11   8   8  10   7    8
  27  |   7   7  11   6   2   6   6   8    3 |    7  12  11  12  10  10  13   8    8
  28  |   5   5  14  10   8   7  11  10    3 |    6  13  13  11  11   7  16   7   10
  29  |   8   8   7  10   4   8   7   5    3 |   10  13  13  10   8  12  14   9    9
  31  |   7   6  22  15   8   9  10  11    4 |    7  13  15  20  11   7  20   6   12
------|--------------------------------------|--------------------------------------
 RMS  |   7   8  15  10   7   8  10   9      |T  11  16  19  15  14  11  18  11   12
 WRMS |   6   8  12   9   7   8  11   8      |NE  6  11  15  13   9   8  14   7    8

Table 3.0837.1   GPS week: 0837   Day: 1   MJD: 50104.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |  10   6  12   7   7   5  12   8    3 |    3  13  13   6  10   6  12  10    7
   2  |   6   7  15   8   7   6  14   9    3 |    4  13  16  13  10   6  14   7    7
   4  |   4   6  11   8   8   7   8   7    3 |    5  11  15  12  12   5  12   7    6
   5  |   4   7  12  10   5   7  11  11    3 |    5  11  13  15   9   6  13   8    6
   6  |   4   7  10   6   5   7   7   8    2 |    6  13  15  12  16   6  14   9    9
   7  |  10   9   9   9   5   9   8  11    4 |    5  14  14  14  11   7  12  12    7
   9  |   5  10   9   8   3   5  12   7    3 |    6  10  13  10  10   7  12   6    6
  12  |   8  11   8  10   4   7  16  11    4 |    8   8  13  15  12   6  17  13    8
  14E |   7   8  14  10   4  11  12   7    4 |    6  15  16  13  11   6  12   7    8
  15  |   5   6  17  10   6   8   7   8    3 |    5  11  20  14  10   7  13   6    6
  16E |   7   8  14  16   5   8  14   8    4 |   12  14  18  11  12   5  18   5    9
  17  |   6   5  15   8   6   5  11  10    3 |    6  14  21  13  11   7  21   6   10
  18  |   5   6   9   7   4   4  11   5    2 |    5  10   9   8   7   6  12   6    6
  19  |   5   5   9   6   4   3   8   7    2 |    4   9   8   9   8   4   9   6    5
  20  |   4   9  14  14   4   7  10  10    4 |    3  12  16  13   9   4  14   6    6
  21E |   8  10  31  20   7  12  13  18    6 |   24  30  35  33  29  24  33  26   26
  22  |   4   8  14  10   4   8  11  10    3 |    5  12  19  13   9   6  15   7    7
  23E |  20  26  41 ---   7  26  32  22   12 |   26  36  30 ---  25  12  36  12   20
  24  |   5   5  17  14   4   6  10   8    3 |    7  10  22  18   9   4  11   9    7
  25  |   6   7  12   4   8   7  10   8    3 |    5  10  13   5   7   6  13   6    5
  26  |   6   6   8   9   3   5  10   9    3 |    2   7  11   8   7   6  13   4    4
  27  |   3   3   7   5   6   4  12   8    2 |    5  10   8  10  10   5  13   8    6
  28  |   5   8  12  10   3   6  14   9    3 |    5  10  16  11   8   5  11  10    6
  29  |   6   9   7   8   6   7   8   7    3 |    6  12   9   8   8   8   9  10    6
  31  |   8   6  21  11   4  10  12   8    4 |    5  12  16  10   9   4  14   8    6
------|--------------------------------------|--------------------------------------
 RMS  |   7   9  16  10   5   9  12  10      |T   8  14  17  13  12   7  16   9    9
 WRMS |   6   8  11   9   5   9  14   9      |NE  5  11  14  11   9   5  13   8    6

Table 3.0837.2   GPS week: 0837   Day: 2   MJD: 50105.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   8   7  16  13   5   5  10   8    3 |    4   8  11   9   6   7  11   8    4
   2  |   6   6  16   7   6   4   7   5    2 |    5  13  16  14  10   6  13   7    7
   4  |   7   8  16   8   6   4  14   7    3 |    4  11  21  10  11   7  19  11    7
   5  |   6   6   8   9   6   6  16   7    3 |    4  11  12  14   9   6  16   7    6
   6  |   3   8   8   9   6   5  10   7    3 |    6  13  14  12  12   7  13   7    7
   7  |   9   8  21   8   8   5  11   8    4 |    4  13  21  13   9   4  14   6    6
   9  |   4   7  15  10   4   5  10   5    3 |    5   7  10  10   7   7  11   6    4
  12  |   6  11  11   7   5   6   7   5    3 |    9   7  18  13  12   6  13   9    7
  14E |   7   8   8  16   6   7   7  10    4 |    5  14  13  20  12   6  12   9    8
  15  |   6   6  12  10   4   6  14   8    3 |    6  13  16  14  12   7  19   5    7
  16E |   5  10  10  13   3   8  13   8    4 |   13  17  17  14  12   5  21   7   10
  17  |   5  10  11   8   4   4   9   9    3 |    5  16  22  12  11   7  15   6    8
  18  |   6   5   8   7   8   2   8   6    2 |    4  12   9   8  10   7  11   7    6
  19  |   5   6  12   7   5   5   8   6    2 |    3   7  12   9   6   8  11   5    4
  20  |   6   6   8  12   5   6  12   8    3 |    5  11  13  13   8   5  15   6    6
  21E |   9   8  24  19   8  11  13  13    5 |   16  22  34  30  23  11  26  13   17
  22  |   4   8  12   9   6   3   9   8    3 |    6  13  15  13  11   7  14   6    7
  23E |  10  17  39 ---   4  11   8  10    7 |   43  41  33 ---  40  42  39  44   39
  24  |   6   8  23  11   5   5   9   5    3 |    5  10  25  13  11   6  11   5    7
  25  |   4   8  11   7   3   5   8   4    2 |    5  10  14   8   9   8  12   5    5
  26  |   5   6  13   8   2   7   9   4    3 |    6  10  15  11   5   8  10  10    6
  27  |   3   5  14   9   4   4   7   7    2 |    4  11  13  12   7   7  11   6    6
  28  |   6   8  19   8   5   4  16   8    4 |    5  11  14  10   9   5  12   8    6
  29  |   6   8  11   7   7   3   9   5    2 |    5  13  11   9   8   8  11   8    6
  31  |   7  11  18  10   6   7  10   6    3 |    7  19  17  13  11   8  17  10   10
------|--------------------------------------|--------------------------------------
 RMS  |   6   8  16  10   5   6  11   7      |T  10  14  17  13  13  10  16  11   10
 WRMS |   6   8  12   9   5   6  11   6      |NE  5  11  15  11   9   6  13   7    6

Table 3.0837.3   GPS week: 0837   Day: 3   MJD: 50106.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   8   8  19   7   5   4  14   7    3 |    3   8  14   9   8   6  12  12    6
   2  |   5   6  15   9   5   5   6   7    3 |    5  13  22  15  12   5  15   7    8
   4  |   6   9  18   8   5   5  12  13    4 |    5   9  21  10   8   7  15  12    7
   5  |   5   6  11  10   5   8  14  11    3 |    4  11  13  14  11   8  17   9    7
   6  |   3   7  13   8   5   8   6  10    3 |    5  12  15  12  12   6  14  10    8
   7  |  10   8   8   7   6   5   9  12    3 |    6  13  18  14  12   7  13   9    8
   9  |   4   8  17   7   4   5   5   6    3 |    5   8  13   9   7   7  12   7    5
  12  |   6   9  10   3   4   7   9   7    3 |    8   9  14  12  11  10  16   9    8
  14E |   8  11  13  11   7   6  15  10    4 |    5  18  19  16  11   8  20   8   10
  15  |   7  15  17   9   6   8  11  10    4 |    9  16  17  15   9   5  16   9    7
  16E |   7  11  18  17   8  10  13  12    5 |   13  18  24  19  17   5  22   8   11
  17  |   5   8  11   7   4   4   6   8    2 |    5  14  14  12  12   8  15   5    8
  18  |   5   8   6   9   8   5   8   7    3 |    5  13   8   9  12  10  10   8    7
  19  |   4   6  14   7   8   6   3   7    2 |    5   8  11   9   7  10  10   7    5
  20  |   5   6  13   8   7   7  12   9    3 |    4  10  17  14  12   6  17   9    8
  21E |   6  14  14  15   7  10   8  17    5 |   13  23  27  22  19  12  21  15   14
  22  |   4   8  20   7   5   7   9  10    3 |    6  15  23  12  12   6  18   6    9
  23E |  10  29  37 ---  15  20  10  11    8 |   28  40  43 ---  33  25  30  27   26
  24  |   6   8  21   8   7   5   9   7    3 |    4   9  18  12   9   5  16   9    6
  25  |   5   8  11   5   4   4   8   4    2 |    6   8  12   8   8   6  12   8    6
  26  |   5   7   9   8   5   6  11   7    3 |    6   8  10  10   8   7  15   8    6
  27  |   2   3  10   8   6   3   8   8    2 |    6   7   9   8   6   9  15   7    6
  28  |   5   7  20   9   6   5  10   9    3 |    7  11  18  10  11   6  18   7    7
  29  |   6   9  12   7   9   4   9   7    3 |    5  12  11   9   7   8  11   9    7
  31  |   7   8  24   7   5   7  11   8    4 |    4  14  17  12  12   5  20   6    8
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  16   9   7   7  10   9      |T   8  14  18  12  12   8  16  10    9
 WRMS |   6  10  13   8   6   7  10   8      |NE  5  11  15  11  10   7  14   8    7

Table 3.0837.4   GPS week: 0837   Day: 4   MJD: 50107.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   9   5  17   9   8   4   9   5    3 |    4   7  10   8  10   5  15   5    5
   2  |   6   9   8   8  10   6   8   6    3 |    5  16  13  14  15   7  19   6    8
   4  |   5   7  22   9   5   7  12   6    3 |    3   9  22  11  11   6  10   5    5
   5  |   4   5  15   9   4   7   9   7    3 |    5  10  15  14   9   6  15   5    6
   6  |   4  11  15   8   7  10   8   7    3 |    5  12  17  13  10   5  16   5    7
   7  |   8   7  17   9   5   7   7   6    3 |    7  15  16  16  10   8  16   8   10
   9  |   3   6  14   5   4   5  12   8    3 |    5   7  13   9  10   6  18   7    5
  12  |   7  10   8   5   6   5  10   6    3 |    8  12  14  11  12   8  20   8    8
  14E |   7  11  15  16   7   7  13  13    4 |    6  16  18  24  17  10  21  10   11
  15  |   5   6  10  10   7   7   9   7    3 |    5  13  13  12  10   5  14   5    6
  16E |   9   7  18  12   9   9  12  10    4 |   15  16  16  15  12   5  21   5    9
  17  |   6   8   9   8   6   3  11   7    3 |    6  12  14  12  11   7  15   5    6
  18  |   6   6   8   9   6   4  10   5    2 |    6  12  10  10  11   9  15   4    7
  19  |   3   5  10  11   6   5   9   6    3 |    5   7  10  11   9   6  14   5    4
  20  |   6   6  14   9   7   7   7   9    3 |    4  11  17  13  12   6  15   6    6
  21E |   5   8  18  15   8   7  20  13    4 |   19  22  33  28  26  19  28  21   20
  22  |   4   6  10   7   9   5  21   9    3 |    5  11  17  12  15   6  22   4    7
  23E |  11  18  29 ---   7  21  49  19   10 |   38  45  43 ---  37  31  63  31   36
  24  |   4   6  16  12   6   8  12   6    3 |    4   8  19  12  11   8  11   6    5
  25  |   5  11  12   7   5   6  16   8    3 |    9  11  16   9  10   6  12   5    7
  26  |   4   5  13  10   9   4  10   6    2 |    4   9  10   9  10   7  13   6    6
  27  |   3   5  10   8   6   4  11   7    2 |    8  10  11  10  11   7  12   4    7
  28  |   6   9  20   9   7   7  14   6    4 |    5  12  14  11  12   5  16   5    7
  29  |   6  10   9   7   6   3   6   5    2 |    6  12  12  10   8   9  14   7    7
  31  |   6   9  18   7   9   6  12   6    3 |    4  15  14  10  13   7  18   4    7
------|--------------------------------------|--------------------------------------
 RMS  |   6   8  15  10   7   7  15   8      |T  10  15  17  13  14   9  20   9   10
 WRMS |   5   8  14   9   6   7  13   8      |NE  5  11  14  11  11   6  15   5    6

Table 3.0837.5   GPS week: 0837   Day: 5   MJD: 50108.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   5   6   9   7  12   4   9   5    2 |    5   9  12   6  15   5  10   7    6
   2  |   8   7  15   9   4   3   8   8    3 |    6  14  14  13  12   7  14   6    8
   4  |   7  10  13   7   5   5  13   5    3 |    4  14  16  10  12   6  13   5    6
   5  |   3   8   9   8  10   5   7   7    2 |    5  12  11  13  11   6  12   4    6
   6  |   4  10  10  13   5   7   8   6    3 |    4  14  15  13  11   5  14   5    6
   7  |   9  10  19   9  12   7  12   6    4 |    6  17  17  14  15   7  13   6    9
   9  |   4   8  10   4   6   4  13   5    2 |    5   8  12   7   9   7  14   4    5
  12  |   9  13  10   8   9   9   9   7    3 |   10  11  16  14  11  13  14  10   10
  14E |   9   8  13  13   6   6  10   8    3 |    5  17  18  20  14   8  17   7   10
  15  |   8   7  12   9   8   8  11   7    3 |    5  15  12  14  15   9  14   5    7
  16E |  14   9  17  13  11   9  10  11    4 |   19  16  20  15  12   5  18   6   10
  17  |   5   8  11   9   6   7  12   7    3 |    4  12  15  12  11   8  18   4    7
  18  |   5   9   9   9   5   5   7   5    2 |    5  12  10   8  11   8   9   5    6
  19  |   4   7   7  10   4   7  10   8    3 |    4   7  10   8   8   8  10   7    4
  20  |   5   6  10  11  10   7  10   7    3 |    4  11  14  13  13   6  12   5    6
  21E |   5  12  22  14   4   7  16  17    5 |   25  31  37  31  28  25  30  26   25
  22  |   8   6  14   7   6   5   9  12    3 |    7  12  22  13  14   8  21   5    9
  23E |  29  15  47 ---  12  18  48  20   12 |   48  48  62 ---  42  34  67  36   40
  24  |   6   9  20  13   8   5   8   6    3 |    5  11  14  13  11   5  11   5    6
  25  |   7   8  13   5  11   4   7   8    3 |    6  10  17   7  12   5  15   4    6
  26  |   4   6  16  11   3   3   8   5    3 |    4  12  15   8  10   6  10   7    6
  27  |   5   8  12  12   5   3  11   8    3 |    6  13   9   8   9   6   8   4    6
  28  |   7   8  21  14   7   6  14   6    4 |    6  12  16  17  15   6  16   8    7
  29  |   8   9   8   9   5   4   8   4    3 |    5  10  11  10   9   7   9   6    6
  31  |   6   9  15  11   9   5   9   6    3 |    4  14  14  12  12   7  12   4    7
------|--------------------------------------|--------------------------------------
 RMS  |   9   9  16  10   8   7  14   9      |T  12  16  20  13  15  10  19  10   11
 WRMS |   6   9  12  10   7   7  19   7      |NE  5  12  14  11  11   7  13   5    6

Table 3.0837.6   GPS week: 0837   Day: 6   MJD: 50109.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   5   7  16   6  15   4  15   6    3 |    5  11  15   8  11   5  18   8    6
   2  |   6   7   8   8  28   6   6   6    2 |    8  13  17  14  16   8  17   7    9
   4  |   6   7  12   8  29   5  11   5    3 |    4   9  16  10  22   6  16   5    7
   5  |   4  10  11  10  25   5   8  10    3 |    6  12  14  16  11   6  18   6    8
   6  |   5   6  12   9  10   7   9   9    3 |    6  12  13  14  13   5  18   8    7
   7  |   6  10  14  11  19   7  12   5    3 |    7  13  17  13   9   7  19   6    8
   9  |   4  10  11   6   7   4   7   6    2 |    7  10  13   8  12   7  13   3    6
  12  |   8  11   9   5  12   4   9   5    3 |    9  10  18  12  11  11  15  10   10
  14E |   6   9  15  13  12   7  12   9    4 |    6  16  17  20  20   9  23   8   10
  15  |   4   8  13   9   9   5   8   6    3 |    5  13  14  12  14   6  16   6    7
  16E |  15  10  25  13  22  10   8   6    5 |   14  17  23  16  15   9  20   8   12
  17  |   6   8  13  12   6   7  15   7    3 |    5  14  15  13  11   7  14   5    7
  18  |   4   6  12   5   6   5   5   5    2 |    7  11  11  10  12   8  16   7    7
  19  |   4   4  13   4  11   3   9   6    2 |    7   8  12  12   9   8  15   6    7
  20  |   4   7   9  11  22   5   9  10    3 |    6  12  14  17  15   5  17   7    8
  21E |   6  16  16  14  21   9  29  16    6 |   25  30  30  29  29  24  27  26   24
  22  |   8   7  15   7  15   7  17   9    4 |    6  15  20  14  16   8  29   5   10
  23E |  14  34  53 ---  29  14  13  20   11 |   52  69  64 ---  60  44  61  43   51
  24  |   8   6  11  11  20   8   8   6    3 |    5   9  13  11  19   9  14   4    6
  25  |   7   7  13   4  19   4  11   8    3 |    9  10  13   8  20   8  14   7    8
  26  |   5   6  10   7  21   7  14   9    3 |    6  12  13  10  19   6  19  13    7
  27  |   6   4  12   6  10   3  10   6    2 |    8  11  11  11  11   9  14   6    8
  28  |   9   8  13  13  16   6  17  11    4 |    6  12  14  14  18   6  22   9    8
  29  |   4   7  10   7   5   5  11   5    3 |    7  10  12  12   9   9  17  10    7
  31  |   6  14  10   7  12   6  14  11    4 |    5  20  13  14  17   8  24   7   10
------|--------------------------------------|--------------------------------------
 RMS  |   7  11  17   9  18   7  12   9      |T  13  19  20  13  19  12  21  12   13
 WRMS |   6  11  12   8  14   7  12   7      |NE  6  12  14  12  14   7  17   7    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 4.0837   GPS week: 0837   MJD: 50103.0-50109.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1889 |U  60   40   93 |U  56   40  110 |   47   38   81 |
emr | emr 2350 |   43   29   73 |   33   26   69 |U  35   20   54 |
esa | esa 2160 |  147   80  205 |U 119   70  201 |  114   51  167 |
gfz | gfz 1152 |  173  105  335 |U 189  103  307 |  183  101  294 |
igp | igp 2289 |   68   41  114 |   57   38  102 |   44   25   71 |
igs | igs 2397 |   50   34   82 |   39   28   86 |   40   23   63 |
jpl | jpl 2376 |U  40   28   69 |U  30   23   66 |   37   21   57 |

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 5.0837.0   GPS week: 0837   Day: 0   MJD: 50103.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2170 |   52   37   86 |   54   44  121 |   46   30   69 |
emr | emr 2377 |   35   32   73 |   37   30   82 |   30   18   49 |
esa | esa 1935 |  211  112  270 |  268  130  351 |  222   83  307 |
gfz | gfz 1152 |  109   73  295 |  186  103  299 |  157  106  280 |
igp | igp 2392 |   44   34   76 |   39   32   81 |   47   24   68 |
igs | igs 2400 |   37   33   77 |   48   33  102 |   46   27   77 |
jpl | jpl 2384 |   36   32   68 |   36   27   79 |   36   21   54 |

Table 5.0837.1   GPS week: 0837   Day: 1   MJD: 50104.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2131 |   56   37   88 |   38   32   99 |   51   33   75 |
emr | emr 2366 |   54   28   79 |   26   21   48 |   34   18   54 |
esa | esa 2242 |  102   66  118 |   51   45  139 |   88   56  143 |
gfz | gfz 1152 |  210   99  343 |  160  110  292 |  167  104  295 |
igp | igp 2400 |   53   28   81 |   31   22   53 |   43   22   65 |
igs | igs 2400 |   54   32   77 |   25   20   57 |   31   22   61 |
jpl | jpl 2384 |   51   24   78 |   26   17   49 |   36   19   56 |

Table 5.0837.2   GPS week: 0837   Day: 2   MJD: 50105.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2217 |   51   46   86 |   62   37  111 |   48   35   79 |
emr | emr 2383 |   39   32   69 |   36   27   57 |   32   19   50 |
esa | esa 2220 |  200   85  314 |   64   63  147 |   65   38  133 |
gfz | gfz 1152 |  134   90  262 |  176   88  279 |  170  102  268 |
igp | igp 2393 |   41   36   72 |   40   28   65 |   38   21   56 |
igs | igs 2400 |   42   40   80 |   41   28   79 |   36   20   63 |
jpl | jpl 2384 |   36   34   67 |   28   23   56 |   34   20   51 |

Table 5.0837.3   GPS week: 0837   Day: 3   MJD: 50106.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2160 |   87   40  119 |   73   51  115 |   57   50   79 |
emr | emr 2366 |   45   24   71 |   28   20   49 |   33   19   52 |
esa | esa 2207 |  104   52  150 |   54   42  119 |  100   47  122 |
gfz | gfz 1152 |  120   97  335 |  204   98  316 |  174   93  284 |
igp | igp 2394 |   46   26   71 |   35   20   52 |   35   19   56 |
igs | igs 2398 |   47   24   79 |   33   22   61 |   39   23   50 |
jpl | jpl 2371 |   35   23   60 |   21   15   37 |   37   20   56 |

Table 5.0837.4   GPS week: 0837   Day: 4   MJD: 50107.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod  341 |   45   42   65 |   49   40   91 |   35   41   93 |
emr | emr 2360 |   46   28   80 |   30   23   57 |   32   18   56 |
esa | esa 2065 |  105   50  133 |   55   56  171 |   97   50  169 |
gfz | gfz 1152 |  133  136  433 |  199  110  356 |  257  112  318 |
igp | igp 2399 |   57   39   79 |   41   28   99 |   53   35   88 |
igs | igs 2399 |   54   30   86 |   37   28   85 |   41   23   68 |
jpl | jpl 2384 |   42   27   78 |   28   19   53 |   33   18   56 |

Table 5.0837.5   GPS week: 0837   Day: 5   MJD: 50108.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1970 |   53   36  102 |   54   44  141 |   50   41   88 |
emr | emr 2361 |   36   28   64 |   36   37  108 |   46   25   64 |
esa | esa 2228 |  101   89  130 |   63   56  180 |   56   30  110 |
gfz | gfz 1152 |  225  129  338 |  225  107  317 |  171   99  334 |
igp | igp 2325 |   69   49  113 |   54   49  138 |   47   25   76 |
igs | igs 2380 |   41   38   63 |   35   35  108 |   42   25   67 |
jpl | jpl 2363 |   36   26   64 |   33   34  106 |   45   26   64 |

Table 5.0837.6   GPS week: 0837   Day: 6   MJD: 50109.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2235 |   66   41   95 |   53   31   77 |   40   32   80 |
emr | emr 2234 |   44   30   72 |   33   20   56 |   33   20   51 |
esa | esa 2224 |  156   86  229 |  107   61  208 |   81   37   80 |
gfz | gfz 1152 |  231   96  312 |  162  104  281 |  167   87  270 |
igp | igp 1717 |  126   62  222 |  112   64  168 |   43   28   81 |
igs | igs 2400 |   69   38  107 |   46   28   95 |   43   23   50 |
jpl | jpl 2361 |   41   28   69 |   32   20   57 |   38   21   59 |

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