Subject: [IGSREPORT-2484] Wk 0842 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 12 Mar 1996 19:42:43 PST

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IGS Electronic Report    Tue Mar 12 19:42:43 PST 1996      Message Number 2484
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0842 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0842   (Feb 25, 1996 - Mar 02, 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 (IGS08427.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:

 IGS08420-6.SP3  IGS GPS ephemeris files for days 0-6, week 0842 in SP3 format.
 IGS08427.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08427.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. 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 38 hours of last observation.

4. Centre clock weights were determined using the following non-SA satellites:
   PRN12, PRN15 and PRN28. 

5. 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
           -------------+----------+---------+------------------
            4 (Feb 29)  | 2,4,6,7  |   COD   |  up to ~55 ns           
                        | 16,22,27 |         |                         
                        | 31       |         |                         
           -------------+----------+---------+------------------
            6 (Mar 02)  | 2,12,18  |   ESA   |  up to ~35 ns           
                        | 21,29    |         |                         
 
6. 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 (Feb 28) | 00:00:00 | 23  |   ALL    | Modeling problems
          4 (Feb 29) | 00:00:00 | 16  |   ALL    | Modeling problems (a)

   (a) Due to modeling problems, PRN16 was excluded from the long arc 
       evaluation on days 2-3 (Feb 27-28).

7. 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.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08427.SUM).

Table 1: Week 0842 summary.                       (Feb 25, 1996 - Mar 02, 1996)

Table 1.0842.a   GPS week: 0842   MJD: 50138.0-50144.0

         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  63 | .00  .01 -.01  -.09   .07   .04   .1  .07  .06 |    2.9     .6    2.5
        | .00  .00  .00   .06   .05   .19   .0           |    4.7    5.4
emr  28 | .02  .00  .00   .18  -.06   .47  -.2  .13  .12 |  998.9   19.1    1.1
        | .01  .01  .00   .11   .12   .22   .1           |   38.6    7.3
esa  55 | .00 -.02  .00   .03   .19  -.06  -.1  .12  .10 |    -.2   -8.7    2.6
        | .01  .01  .01   .17   .12   .16   .1           |   16.2   15.2
gfz  45 |-.04 -.04  .00   .12  -.15  -.13  -.3  .13  .12 | 1000.8   18.7    3.2
        | .00  .01  .01   .06   .10   .15   .1           |   38.8    8.2
igp  n/a| .01 -.01 -.01   .26  -.09   .27   .0  .16  .09 |    1.2   -1.4    2.2
        | .00  .01  .01   .17   .20   .15   .4           |    1.8    1.9
jpl  37 | .01  .02 -.01  -.14  -.02   .02   .0  .08  .08 |  999.6   20.2    1.0
        | .01  .01  .01   .13   .16   .09   .1           |   38.4    7.2
ngs  43 | .01 -.05  .01   .15   .50   .00  -.2  .17  .16 |    1.5    -.1   76.9
        | .01  .01  .01   .44   .28   .42   .2           |    3.8    5.5
sio  111|-.01  .02  .01   .07  -.26  -.26   .2  .08  .08 |     .0     .0     .0
        | .00  .00  .00   .08   .04   .12   .1           |     .0     .0

Table 1.0842.b   GPS week : 0842   MJD: 50138.0-50144.0

         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
------|-----------------------------|------------------------------------------
   1E |   3   3   4   4   4   4   4 |
   2  |   3   3   3   2   3   3   3 |
   4  |   3   3   3   3   3   2   3 |
   5  |   2   3   3   3   3   3   2 |
   6E |   3   4   5   5   4   4   4 |
   7E |   4   4   4   4   5   5   5 |
   9  |   2   3   3   3   3   3   3 |
  12  |   3   5   4   4   3   3   3 |
  14  |   2   3   3   3   3   3   3 |
  15  |   3   3   3   3   3   3   3 |
  16  |   3   3  24  12   3   3   3 | Modeling problems on days 2-3.
  17  |   3   3   4   3   3   3   3 |
  18E |   3   3   3   3   3   3   3 |
  19  |   2   2   3   3   2   2   2 |
  20  |   2   2   3   2   2   3   2 |
  21  |   4   3   4   3   4   3   3 |
  22  |   4   2   4   3   3   3   3 |
  23  |   3   4   5   9   6   6   4 |
  24  |   2   3   4   4   3   3   3 |
  25  |   3   3   2   2   3   3   3 |
  26E |   3   3   4   4   3   5   3 |
  27  |   2   2   3   3   2   2   2 |
  28E |   5   6   6   7   4   5   4 |
  29E |   2   3   3   3   3   4   3 |
  31E |   4   3   4   5   5   5   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 2.0842.0   GPS week: 0842   Day: 0   MJD: 50138.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .01  .00  -.11   .02   .09   .1  .05  .05 |    1.3    2.2    1.6
emr  29 | .00  .01 -.01   .36  -.04   .14  -.2  .10  .09 |  942.7   26.1     .9
esa  53 | .00 -.04  .00  -.06   .19   .10  -.1  .10  .10 |  -24.0     .1    2.2
gfz  46 |-.04 -.04  .00   .05  -.25  -.39  -.1  .13  .12 |  943.9   25.9    2.4
igp  n/a| .01 -.01  .00   .06  -.01   .32   .0  .06  .06 |    -.3     .6     .9
jpl  37 | .02  .00  .00  -.06   .16   .15   .0  .05  .05 |  943.5   26.7     .8
ngs  43 | .00 -.05 -.01   .41   .31  -.61   .0  .16  .16 |    -.3    2.4   76.0
sio  113|-.01  .02  .01   .00  -.23  -.23   .1  .07  .07 |     .0     .0     .0

Table 2.0842.1   GPS week: 0842   Day: 1   MJD: 50139.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .00  .01  .00  -.17   .01   .24   .2  .06  .06 |    9.5    -.3    1.7
emr  29 | .02  .01  .00   .25  -.16   .32  -.2  .11  .09 |  967.9   15.2    1.0
esa  55 | .01 -.01  .00   .23   .40  -.12  -.1  .11  .10 |  -12.6  -25.8    2.5
gfz  46 |-.05 -.04  .00   .09  -.15  -.25  -.2  .11  .11 |  969.1   15.1    3.1
igp  n/a| .01 -.01 -.02   .33   .04   .40  -.1  .09  .08 |     .5   -3.2    1.1
jpl  37 | .01  .02  .00  -.25   .11   .04   .0  .06  .06 |  968.9   15.6     .9
ngs  42 | .00 -.05  .01   .66   .23  -.18  -.1  .15  .15 |    4.7   -6.0   75.7
sio  96 |-.01  .02  .01   .04  -.28  -.35   .2  .08  .08 |     .0     .0     .0

Table 2.0842.2   GPS week: 0842   Day: 2   MJD: 50140.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .01 -.01   .03   .06  -.31   .2  .10  .06 |    6.3   -8.9    2.1
emr  27 | .02  .01  .00   .22   .14   .38  -.2  .14  .12 |  982.8   12.4    1.0
esa  56 | .00 -.02  .01   .24   .19   .15   .1  .12  .10 |    1.1  -17.2    2.3
gfz  46 |-.04 -.03  .00   .19  -.26  -.12  -.4  .11  .11 |  986.3    9.4    3.1
igp  n/a| .01  .00 -.01   .07   .20   .27  -.4  .30  .10 |    5.0   -4.3    5.0
jpl  37 | .01  .03 -.01  -.30   .11   .06   .2  .12  .12 |  983.4   13.5     .9
ngs  42 | .02 -.07  .01  -.62   .23   .46  -.4  .22  .21 |    2.4   -2.5   78.1
sio  116|-.01  .01  .01   .04  -.24  -.06   .2  .10  .10 |     .0     .0     .0

Table 2.0842.3   GPS week: 0842   Day: 3   MJD: 50141.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .00  .02 -.01  -.12   .02   .03   .1  .08  .06 |    6.7     .6    2.0
emr  29 | .02  .00  .00   .19  -.04   .86  -.3  .19  .16 | 1000.7   13.0    1.3
esa  56 | .00 -.01  .00   .11   .04  -.24   .0  .11  .10 |     .2  -25.4    2.5
gfz  44 |-.04 -.05  .01   .19  -.11  -.08  -.2  .13  .11 | 1002.8   14.9    3.5
igp  n/a| .01 -.02  .00   .35  -.06   .43   .0  .11  .07 |     .6    1.1    1.3
jpl  37 | .00  .02 -.02  -.18  -.01  -.16  -.1  .08  .08 | 1001.5   14.6    1.3
ngs  45 | .03 -.05  .04   .15   .68   .07  -.4  .17  .17 |    7.2   -6.1   77.6
sio  113| .00  .01  .01   .14  -.33  -.17   .3  .09  .09 |     .0     .0     .0

Table 2.0842.4   GPS week: 0842   Day: 4   MJD: 50142.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .00  .01  .00  -.09   .11   .10   .2  .06  .05 |    -.7     .7    4.7
emr  27 | .01 -.02  .00   .06  -.25   .52   .1  .12  .13 | 1012.5   15.4    1.1
esa  55 | .00 -.03 -.01  -.10   .05  -.17  -.2  .14  .12 |   27.8   14.3    1.8
gfz  43 |-.04 -.04 -.01   .06  -.23  -.15  -.4  .14  .13 | 1014.4   15.0    3.5
igp  n/a| .02 -.01 -.01   .52  -.33   .35  -.3  .13  .08 |     .8   -1.3    1.1
jpl  37 | .00  .03  .00  -.23  -.07   .04   .0  .06  .06 | 1013.3   17.2    1.1
ngs  45 | .02 -.06  .00   .46   .98   .39  -.2  .16  .16 |   -1.6    3.6   77.0
sio  114|-.01  .02  .01   .23  -.25  -.41   .1  .07  .07 |     .0     .0     .0

Table 2.0842.5   GPS week: 0842   Day: 5   MJD: 50143.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  62 | .00  .01 -.01  -.08   .11  -.10   .1  .06  .06 |    1.2     .7    2.2
emr  28 | .02  .00  .00   .02  -.03   .54  -.2  .11  .11 | 1027.8   31.8    1.0
esa  55 |-.01 -.02  .00  -.20   .19   .07  -.2  .11  .10 |   -1.9    3.2    1.9
gfz  45 |-.05 -.04  .02   .13  -.06  -.04  -.4  .14  .14 | 1027.9   33.6    3.1
igp  n/a| .02  .00 -.02   .34  -.13   .11   .7  .15  .10 |     .4   -1.6    1.1
jpl  37 | .01  .02 -.01   .03  -.28   .01   .0  .08  .08 | 1027.9   33.0    1.0
ngs  40 | .02 -.05  .02   .23   .62   .30  -.2  .16  .15 |   -4.1    9.1   76.4
sio  115|-.01  .02  .01   .04  -.19  -.33   .3  .08  .08 |     .0     .0     .0

Table 2.0842.6   GPS week: 0842   Day: 6   MJD: 50144.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  59 | .01  .02  .00  -.10   .14   .20   .1  .07  .06 |   -4.0    9.6    2.2
emr  29 | .01  .00 -.01   .19  -.01   .51  -.4  .10  .10 | 1058.2   20.1    1.2
esa  57 | .00 -.02 -.01   .02   .25  -.20  -.2  .11  .10 |    8.3  -10.3    4.2
gfz  43 |-.04 -.05 -.02   .14   .00   .08  -.1  .13  .13 | 1061.4   17.3    3.5
igp  n/a| .00  .00 -.02   .15  -.37   .02   .5  .13  .10 |    1.3   -1.3    1.3
jpl  37 | .01  .01 -.01   .01  -.12   .03   .0  .06  .06 | 1058.7   20.7    1.2
ngs  45 | .00 -.04  .02  -.24   .43  -.47   .0  .13  .12 |    2.0    -.9   77.4
sio  112|-.01  .01  .02   .00  -.27  -.26   .2  .07  .07 |     .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 3.0842.0   GPS week: 0842   Day: 0   MJD: 50138.0

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

Table 3.0842.1   GPS week: 0842   Day: 1   MJD: 50139.0

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

Table 3.0842.2   GPS week: 0842   Day: 2   MJD: 50140.0

               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   7  11  12  14   5  11  10    4 |    8  11  14  13  15   9  19   9    7
   2  |   5   7   6   9   7   5  23   7    3 |    5   9  14  12   9   9  16  12    6
   4  |   5   5   9  10   9   5  19   6    3 |    7   8  13  15  13   7  18   8    7
   5  |   4   6   9   6   7   4  20  10    3 |    6   8  11  12   8   7  11  12    6
   6E |   6  14  16  15  11  12  13   8    5 |   10  17  15  18  16  12  18   6    8
   7E |   8  15   6  17   6   9  12   4    4 |    5  11  15  24  11   8  21   9    9
   9  |   6   6   8  10   4   4  17   8    3 |    6  10  10  10   8   7  14   9    5
  12  |   7  14   9 ---  12 ---  12   7    4 |    8  15   8 ---  16 ---  14  11    9
  14  |   5   5   8  10   6   5  23   6    3 |    5   9  11  15  10   7  19   9    7
  15  |   5  12  10   9  13   6  17   7    3 |    7  14  13  12  13   6  16   8    6
  16  |  36 --- --- --- 143  49  65  26   24 |    0 --- --- ---   0   0   0   0  ---
  17  |   5  11  18   9  13   6  22   6    4 |    5  15  13  11  16   8  22   7    6
  18  |   5   7   9  13   9   6  14   7    3 |    8  10  15  14  15   9  22   7    9
  19  |   5   8  11   7  10   6  16   9    3 |    4  10  12   8   8   9  15   7    5
  20  |   4   8   8   7   7   5  15   7    3 |    5   9  12  11   8   6  14   9    6
  21  |   7  23  11   8   9   5  22   8    4 |    5  24  15  13  11   8  23   6    6
  22  |   5  14  10   6  12   7  16  11    4 |    5  15  12   9  15   6  17  13    5
  23  |   7   5  26  11   7   4  16   6    5 |   12  16  22  20  13  16  18  15   14
  24  |   6  13  17  11   8   7  17   6    4 |    9  10  11  16  14   8  20   9    7
  25  |   5  10   7   5   6   4  10   6    2 |    5  12  11   8   9   8  12   8    5
  26  |   7  10  11  12   9   6  20   6    4 |    9   9  15  11  15   8  24   8    7
  27  |   6  13   7   8   7   5  16  10    3 |    5  12  11   7  11   8  15  10    6
  28E |   7  38   9  19   9   6  16  10    6 |    9  47  14  17  15   8  18   7   10
  29  |   6   7  11   9   8   5  11   6    3 |   12  13  16  14  16  13  22  12   11
  31E |   5   9  10  14  18  11  21  15    4 |   14  16  18  18  18  13  20  17   13
------|--------------------------------------|--------------------------------------
 RMS  |   9  13  11  11  30  12  21   9      |T   7  15  13  13  13   9  18   9    7
 WRMS |   6  12   9  10  10  12  21   9      |NE  6  12  13  12  12   8  17   9    7

Table 3.0842.3   GPS week: 0842   Day: 3   MJD: 50141.0

               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  |   6   8  10  11   5   5  23  10    4 |    8  11  13  15  12   9  30  11    8
   2  |   7  11   6   8   6   3  10   4    2 |    6  13  11  14  10   7  21  11    7
   4  |   5   9   8   9  11   5  11   8    3 |    6  10  11  13  11   6  11   7    6
   5  |   4   9  10   8   5   4  14   6    3 |    5  12  12  11   9   7   9   6    5
   6E |   8  17  10  14   8   9  27  11    5 |    7  20  12  17  12   8  24  12    7
   7E |  10  21   7  13   7   4  13   5    4 |    6  12  13  23  15  10  21  11   10
   9  |   4  10  10   9   5   4  11   9    3 |    4  11   8   9   7   6  12   8    5
  12  |   5  14   8 ---   7 ---   9   9    4 |    8  18   7 ---   8 ---  11  15    8
  14  |   6  10   8  15   5   5  12   6    3 |    7  12  12  13  10   5  10   8    6
  15  |   6   5  10   8   8   6  13   6    3 |    4   9  11  12  12   7  13   8    7
  16  |  20  33 --- ---  35  19 ---  17   12 |    0   0 --- ---   0   0 ---   0  ---
  17  |   4   9  10  11   6   6  12   8    3 |    6  12  11  15  11   8  19  10    7
  18E |   6  10  10  16   5   6   9   6    3 |   11  14  11  15  14  12  16  16   11
  19  |   4   8  10   6   4   3  10  10    3 |    4   8   9   7   8   6  12  10    5
  20  |   2   5  10   7   4   5  14   5    2 |    5  10  13  12   8   7  10   6    5
  21  |   5   9  12   8   6   6  16   6    3 |    6  11  14  14  11   8  22   9    6
  22  |   4  16  11   8   7   4  11   5    3 |    6  19  14  11  12   9  15  11    7
  23  |  16  36  26  27  18  18  36  18    9 |   27  38  36  23  26  37  28  36   27
  24  |   6  18   9  11  13   7  16   8    4 |   11  13  12  18  10  10  19  12   10
  25  |   6   8   8   6   7   4  11   7    2 |    6  10   9   7   7   7  12   7    5
  26  |   6  26  12  11   8   6  12   7    4 |    7  22  15  17  12  10  14  11    9
  27  |   5   6   6   7   5   5  11  11    3 |    4   9   9   7   8   9   7  10    5
  28E |   7  52  10  12  10   7  20  10    7 |    6  53  15  15  16   8  17  10    8
  29E |   4   7  13  11   5   6   8   6    3 |   11  13  19  20  11  10  15  15   11
  31E |   7  13  10  19   9   8  21   8    5 |   16  16  18  20  16  13  29  16   13
------|--------------------------------------|--------------------------------------
 RMS  |   7  18  11  12  10   7  16   9      |T   9  18  14  14  12  11  17  12    9
 WRMS |   6  15  10  11   7   7  16   9      |NE  8  14  13  13  11  11  16  12    9

Table 3.0842.4   GPS week: 0842   Day: 4   MJD: 50142.0

               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  |   6   8   9  16   9   8  19   7    4 |    8  16  15  15  10   9  24   9    8
   2  |   5   9  11  13   6   5  16   5    3 |    5  11  14  12  10   8  13   9    5
   4  |   5  10  13  12   4   6  14   5    3 |    5  14  12  14   9   6  12   4    6
   5  |   3   6  12   9   6   3  15   7    3 |    4   8  12  11   8   6  15   9    4
   6E |   5  19  14  16  15   5  15   7    4 |    8  23  13  20  15   6  19  10    7
   7E |   8  22  11  18  11   6  21   6    5 |    5  14  14  25  16   7  25   8    7
   9  |   4   8  14  11   5   4  11   6    3 |    6   9  10  12   9   6  11   7    4
  12  |   3   9  10 ---   7 ---  11   5    3 |    5   8   9 ---  10 ---  13  10    6
  14  |   5   5  16  13   5   4  17   6    3 |    7   9  16  16  10   9  14   7    7
  15  |   5   9  14  13   4   5  10   6    3 |    8  11  13  15   9   9  11   6    7
  16  |   5  13  10 ---  35   4  12   4    3 |    4  10   9 ---  26   4  14   6    5
  17  |   5   9   8  10   4   6  15   5    3 |    8  12  12  15  11   9  15   8    7
  18E |   6   8   8  17   4   6  13   5    3 |   10  14  12  18  13  12  19  13   11
  19  |   3   7   9   9   5   4  10   7    2 |    4   9   9   7   8   8   9   9    4
  20  |   2   5  15   7   6   5  11   5    2 |    4   7  13  13   9   8  10   7    5
  21  |   6  11  10  10   8   9  23   6    4 |    7  14  15  16  12  12  22   6    6
  22  |   5  16  13  10   8   7  10   6    3 |    4  18  12  14   6   8  11   8    5
  23  |   6  25  35  11  34   6  22  10    6 |   39  50  22  31  52  38  44  44   37
  24  |   3  10  14  12  11   5  11   6    3 |    5  11  12  16  10   5  12  10    5
  25  |   6  13  13   7  14   4  13   6    3 |    5  14  11   9   9   7  14   6    5
  26E |   5   6   8  14   8   5  15   4    3 |   10  17  17  21  18  13  17  12   12
  27  |   3   6   8   8   4   5  14   8    2 |    5   8   9  10   7   7  10   8    4
  28E |   7  19  11  19  10   6  17   7    4 |    5  18  13  22  11   8  20  11    6
  29E |   4   8   9  12   9   5  11   6    3 |    8  10  11  14  15  11  13   9    8
  31E |   8   9  14  25   8   7  21  10    5 |   10  12  15  25  13  10  23  11    9
------|--------------------------------------|--------------------------------------
 RMS  |   5  12  13  14  12   6  15   6      |T  10  16  13  17  15  11  17  12    9
 WRMS |   5  13  11  12   8   6  15   6      |NE 10  16  12  15  16  11  17  12   10

Table 3.0842.5   GPS week: 0842   Day: 5   MJD: 50143.0

               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
------|--------------------------------------|--------------------------------------
   1E |   7   6   7  16  12   6  21   8    4 |    9  13  14  18  12  12  23  12   10
   2  |   5  11   7  11   5   7  14   5    3 |    4   9   9  15   7   6  11   5    4
   4  |   5   6   9   9  12   6  10   7    2 |    4  10  12  13  14   5  15   5    5
   5  |   5   5   9   7   9   6  15   8    3 |    5   6   9  11   8   9  12   7    4
   6E |   6   9  14  14  14   6  13   9    4 |    8  15  12  18  14   8  19  10    7
   7E |   9  25   7  15   7   9  19   6    5 |    5  13  13  22  14   7  23   6    8
   9  |   3   6   9  10   8   4  19   6    3 |    4  10  11  11  12   6  19   5    5
  12  |   3   8   7 ---  10 ---   9   8    3 |    5   7   7 ---   9 ---   9   9    4
  14  |   5   4  13  11   6   8  16   5    3 |    5   8  16  12   9   7  18   8    6
  15  |   5   7  13  13   3   6  12   6    3 |    6   9  13  10   7   6  12   6    4
  16  |   4   7   7 ---  30   8  12   5    3 |    6  10   8 ---  29   7  13   7    7
  17  |   4   9   8  10   6   7  11   6    3 |    6   9  12  14   8   8  14   7    6
  18E |   5   7  10  13  45   9  16   6    3 |    7  10  10  17  40  12  14  10    8
  19  |   5   7   6  11   9   5   8   6    2 |    4   8   8  11  10   6  11   5    5
  20  |   4   4  10   8  17   4  18   8    3 |    4   5  11  11  12   5  12   7    5
  21  |   3   7  10  12  10   6  15   7    3 |    5   8  15  14  13   8  21   7    5
  22  |   4   8  15   7   9   7  10   9    3 |    4  10  14   7  10   8   8   6    5
  23  |   7  17   9  18  27  14  33  11    6 |   28  31  27  26  40  41  43  40   32
  24  |   4   9  10  12   9   6  12   5    3 |    6   7  13  16  13   8  12   7    7
  25  |   5   7  10   6   7   5  15   5    3 |    5   8  11   9  11   6  14   5    5
  26E |  10  16  14  25   7   7  18   8    5 |   12  12  17  15  13   8  20   9   10
  27  |   4   3   7  14   6   6   7   6    2 |    4   8   9  13   9   8  12   7    5
  28E |   7  16  13  19   8  11  18  10    5 |    8  13  14  17  11   5  17   6    6
  29E |   6   5  11  16  12   9  16   9    4 |    8  10  12  17  14  11  17  13    8
  31E |   7  11   9  25   8  10  19   9    5 |   15  12  17  25  16  13  27  13   13
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  10  14  15   7  16   7      |T   8  11  13  15  16  11  18  11    9
 WRMS |   5  11  10  13  10   8  15   7      |NE  8  11  12  13  15  12  16  11    9

Table 3.0842.6   GPS week: 0842   Day: 6   MJD: 50144.0

               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
------|--------------------------------------|--------------------------------------
   1E |   4  11   8  16  25   7  18   7    4 |   12  13  14  17  10  13  27   9   11
   2  |   6   8  11  13   3   5  10   7    3 |    5   9  12  15   9   8  15   7    6
   4  |   6   6  10   8   5   6  13   7    3 |    5   9  14  10   6   7  11   7    7
   5  |   3   5  11  10   6   5   7   6    2 |    6   6   9  12   7   8  13   7    7
   6E |   5  13  11  12   8   6  17   7    4 |    8  17   7  19  10   7  17   8    8
   7E |  13  26  13  14   9   6  16   6    5 |    6  11  13  20  11   7  19   7    7
   9  |   5   5  12  16  10   7   8   5    3 |    5   6  10  14   6   9  11   6    5
  12  |   5   6   9 ---   8 ---   6   8    3 |    8  11   9 ---  11 ---  13  11    8
  14  |   4   6  12  11   4   6  13   4    3 |    5   8  16  14  10   7  14  11    8
  15  |   8   8  14  12   6   4   9   8    3 |    7  17  12  14  12   9  12  10    8
  16  |   6   8   6 ---  21   3  15   6    3 |    5  10  12 ---  18   3  17   8    7
  17  |   7   7  11  10  13   5  16   7    3 |    6   9  12  17  12   9  15   7    5
  18E |   6   5  10  15  26   6  10   7    3 |    9  11  12  17  23   8  19   8   11
  19  |   4   3   8   9  10   3   7   6    2 |    4   7   9  10   6   6   9   7    6
  20  |   2   4  10   7   6   5   9   4    2 |    5   6  10  11   9   8  12   6    6
  21  |   6   6  15  11  12   5  12   6    3 |    5  10  17  15  12   7  17   8    7
  22  |   5   7  11  14  14   4  13   4    3 |    5  12  17  11  14   6  10   8    6
  23  |  12   8   9  12  12   7  17  10    4 |   24  36  39  23  31  33  42  41   33
  24  |   4   5  13  12  10   5   8   6    3 |    7   9  13  20  10   5  10   7    7
  25  |   5   8  10   9  12   3  10   7    3 |    6   7  13   8  13   5   9   9    5
  26E |   6  12   9  15   4   6  13   4    3 |    7  10  12  21   9   7  16   7    7
  27  |   2   2   6  12  10   4  10   6    2 |    5   5  10  14   6   7  10   7    5
  28E |   7  16  14  11   8   8  16   7    4 |    9  18  15  17  13   7  19   8    8
  29E |   5   6   6  14  19   7  10   6    3 |    8   8  12  16  15   7  17  10    8
  31E |  11  12   9  19   9   9  15   8    4 |   21  16  21  24  22  16  26  17   17
------|--------------------------------------|--------------------------------------
 RMS  |   6   9  11  13  12   6  12   6      |T   9  12  14  16  13  10  17  11   10
 WRMS |   6  10  10  12   9   6  12   6      |NE  7  12  15  14  12  10  15  12   10

Table 4: Precise Navigation Summary.

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

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

Table 4.0842   GPS week: 0842   MJD: 50138.0-50144.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2207 |U  49   39   92 |U  51   35  100 |   45   30   72 |
emr | emr 2378 |   36   31   69 |  379  378  382 |U  31   17   44 |
esa | esa 2133 |  108   58  195 |   73   62  161 |   66   47  112 |
gfz | gfz 1118 |  191  131  338 |U 155   96  226 |   90   62  130 |
igp | igp 2361 |   43   35   80 |   38   29   73 |   37   20   60 |
igs | igs 2400 |   49   40   91 |   46   29   77 |   34   19   51 |
jpl | jpl 2282 |U  36   31   70 |U  37   23   65 |   26   15   40 |

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 5.0842.0   GPS week: 0842   Day: 0   MJD: 50138.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2282 |   56   33   97 |   51   41   91 |   41   26   75 |
emr | emr 2393 |   34   21   67 |   39   25   65 |   28   17   51 |
esa | esa 2061 |   80   59  186 |   75   63  193 |   53   32   71 |
gfz | gfz 1152 |  137   84  209 |   95   74  189 |   67   56   83 |
igp | igp 2302 |   41   25   71 |   38   26   68 |   27   17   55 |
igs | igs 2400 |   43   26   77 |   41   28   73 |   28   18   48 |
jpl | jpl 2288 |   37   24   70 |   41   25   67 |   22   14   46 |

Table 5.0842.1   GPS week: 0842   Day: 1   MJD: 50139.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2277 |   51   40   82 |   51   31   94 |   43   26   65 |
emr | emr 2397 |   39   30   65 |   45   24   70 |   28   16   44 |
esa | esa 2165 |  106   56  189 |   66   49  134 |   64   31   99 |
gfz | gfz 1152 |  204  146  317 |  169   93  240 |   90   50  140 |
igp | igp 2341 |   41   33   74 |   43   25   67 |   30   17   49 |
igs | igs 2400 |   47   37   89 |   52   27   78 |   38   17   54 |
jpl | jpl 2288 |   40   33   68 |   44   21   67 |   25   15   41 |

Table 5.0842.2   GPS week: 0842   Day: 2   MJD: 50140.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2292 |   46   36   93 |   50   34  106 |   43   30   65 |
emr | emr 2296 |   42   38   71 |   36   24   68 |   31   17   42 |
esa | esa 2161 |  103   57  174 |   63   42  104 |   81   57  148 |
gfz | gfz 1104 |  192  131  336 |  170  105  175 |   83   63  112 |
igp | igp 2346 |   57   41  109 |   44   28   87 |   47   26   73 |
igs | igs 2400 |   41   45   88 |   45   28   72 |   28   19   44 |
jpl | jpl 2280 |   33   33   63 |   32   20   62 |   25   15   37 |

Table 5.0842.3   GPS week: 0842   Day: 3   MJD: 50141.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2235 |   46   37   81 |   48   32   98 |   45   32   75 |
emr | emr 2392 |   33   28   63 |   31   22   69 |   30   15   40 |
esa | esa 2010 |  151   62  273 |   87   75  156 |   76   47  129 |
gfz | gfz 1104 |  225  126  319 |  184  100  263 |  108   65  119 |
igp | igp 2400 |   41   36   65 |   32   23   72 |   37   17   54 |
igs | igs 2400 |   65   39   90 |   52   27   90 |   36   18   55 |
jpl | jpl 2288 |   39   31   68 |   33   21   72 |   23   14   35 |

Table 5.0842.4   GPS week: 0842   Day: 4   MJD: 50142.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1964 |   52   44   95 |   50   38   95 |   56   33   80 |
emr | emr 2388 |   40   31   73 |  999  999  999 |   35   19   45 |
esa | esa 2199 |  100   47  131 |   71   40  102 |   48   26   71 |
gfz | gfz 1104 |  202  137  459 |  159  105  247 |  102   73  140 |
igp | igp 2400 |   42   32   73 |   37   38   81 |   42   20   68 |
igs | igs 2400 |   55   42   97 |   41   27   71 |   38   21   52 |
jpl | jpl 2282 |   36   32   79 |   37   28   69 |   31   18   40 |

Table 5.0842.5   GPS week: 0842   Day: 5   MJD: 50143.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2173 |   46   39  101 |   60   36  115 |   42   33   76 |
emr | emr 2389 |   35   24   76 |   40   32   68 |   32   17   44 |
esa | esa 2156 |   93   39  142 |   65   65  181 |   52   43   81 |
gfz | gfz 1104 |  190  125  356 |  156   96  208 |   87   54  137 |
igp | igp 2352 |   39   27   75 |   39   34   73 |   37   21   61 |
igs | igs 2400 |   50   37   99 |   50   34   91 |   30   20   53 |
jpl | jpl 2275 |   33   25   75 |   41   28   64 |   27   15   39 |

Table 5.0842.6   GPS week: 0842   Day: 6   MJD: 50144.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2228 |   40   45   95 |   43   33  100 |   45   32   70 |
emr | emr 2390 |   28   38   69 |   26   19   50 |   30   19   40 |
esa | esa 2176 |  106   78  234 |   82   84  217 |   79   74  151 |
gfz | gfz 1104 |  169  155  324 |  138   96  244 |   90   68  165 |
igp | igp 2386 |   32   44   83 |   28   22   63 |   33   19   59 |
igs | igs 2400 |   39   52   95 |   38   28   62 |   36   22   51 |
jpl | jpl 2272 |   31   35   69 |   27   17   49 |   27   17   39 |

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