Subject: [IGSREPORT-2627] Wk 0850 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 6 May 1996 7:23:43 PDT

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IGS Electronic Report    Mon May  6  7:23:43 PDT 1996      Message Number 2627
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0850 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0850   (Apr 21, 1996 - Apr 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 (IGS08507.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:

 IGS08500-6.SP3  IGS GPS ephemeris files for days 0-6, week 0850 in SP3 format.
 IGS08507.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08507.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. PRN 18 was set unhealthy from day 0 (Apr 21) at 02:15 until day 1 (Apr 22) 
   at 17:34 (ref. NANU 078-96113).
   PRN 16 was set unhealthy on day 2 (Apr 23) from 04:22 until 14:39 
   (ref. NANU 081-96114).

6. Some orbit solutions were excluded from the combination because they were
   biasing the weighted average. They were still used for statistics 
   computation.  The following table lists the exclusions:

                     Day (Date)  | PRN  | Centres  
                    -------------+------+---------------
                     0 (Apr 21)  |  18  | ESA           

7. There was a maneuver of PRN06 on day 5 (Apr 26) (ref. NANU 085-96117).
   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 PRN06 were excluded from the long arc evaluation and the point
   positoining evaluation on day 5 due to unrealistic RMS caused by the 
   maneuver.

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

          Day (Date) |   TIME   | PRN | Centres  | Reason
         ------------+----------+-----+-------------------------------------
          3 (Apr 24) | 00:00:00 | 03  |   ALL    | Modeling problems    
          3 (Apr 24) | 00:00:00 | 16  |   ALL    | Modeling problems
          6 (Apr 27) | 00:00:00 | 06  |   ALL    | Maneuver

9. Centre specific UT1-UTC values for ESA and NGS 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 (IGS08507.SUM).

Table 1: Week 0850 summary.                       (Apr 21, 1996 - Apr 27, 1996)

Table 1.0850.a   GPS week: 0850   MJD: 50194.0-50200.0

         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  66 | .01  .02  .01  -.40   .06  -.22   .0  .07  .05 |   -3.3   -1.2    2.6
        | .00  .00  .00   .10   .04   .11   .1           |    7.3    8.5
emr  29 | .00 -.02 -.01   .63  -.06   .63  -.1  .12  .12 | 2177.5   22.7     .9
        | .00  .01  .00   .10   .14   .18   .1           |   53.2    6.9
esa  51 | .01  .00 -.01  -.02   .05  -.26   .0  .78  .15 |    4.3  -21.3   29.2
        | .01  .00  .01   .08   .19   .38   .1           |   32.1   51.1
gfz  45 |-.05 -.05 -.02   .21   .10  -.24  -.2  .14  .13 | 2178.9   22.9     .8
        | .00  .01  .00   .09   .10   .12   .1           |   53.1    6.6
igp  n/a| .01  .00  .00   .20  -.15  -.02  -.2  .12  .08 |    1.3   -2.3    1.2
        | .01  .01  .01   .26   .27   .15   .3           |    3.7    6.0
jpl  34 | .01  .01  .00  -.06  -.02   .24   .2  .09  .09 | 2178.5   23.4     .9
        | .00  .00  .01   .12   .10   .14   .1           |   53.2    6.7
ngs  43 |-.01 -.05  .02   .05   .29  -.47  -.4  .16  .17 |   -3.5    2.2   78.2
        | .01  .01  .01   .27   .11   .24   .1           |    2.4    6.7
sio  109| .00  .02  .00   .04  -.22  -.08   .0  .09  .09 |     .0     .0     .0
        | .01  .00  .00   .14   .04   .07   .1           |     .0     .0

Table 1.0850.b   GPS week : 0850   MJD: 50194.0-50200.0

         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 |
   2  |   4   4   3   4   4   4   4 |
   3  |   5   5   5   5   5   5   5 |
   4  |   4   4   3   3   4   4   3 |
   5  |   3   3   3   2   3   2   3 |
   6  |   4   4   4   4   5   0   4 | Maneuver on day 5.
   7  |   4   4   3   4   4   3   3 |
   9E |   4   3   4   4   4   4   4 |
  14  |   3   3   3   3   3   3   3 |
  15  |   4   4   3   4   4   3   3 |
  16  |  20  34  14   9   7  14  17 | Modeling problems all week. See Remark 5.
  17  |   4   5   4   4   4   4   5 |
  18  |  33   5   4   3   4   3   4 | Unhealthy on days 0-1. See Remark 5.
  19E |   6   5   4   5   5   6   5 |
  20  |   3   5   3   3   3   3   3 |
  21  |   3   3   3   3   3   3   3 |
  22  |   3   3   3   3   3   3   3 |
  23  |   4   4   4   4   4   3   4 |
  24  |   4   5   4   4   4   4   4 |
  25E |   4   4   4   4   4   5   5 |
  26  |   4   4   3   3   4   4   4 |
  27E |   5   5   4   5   5   5   5 |
  28  |   4   4   3   3   3   3   4 |
  29  |   3   2   3   3   3   3   3 |
  31  |   4   4   3   3   3   4   4 |

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

Table 2.0850.0   GPS week: 0850   Day: 0   MJD: 50194.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  70 | .01  .02  .00  -.45   .14  -.30  -.2  .07  .05 |   11.5  -18.6    1.3
emr  32 | .00 -.02 -.01   .58   .04   .86  -.1  .13  .12 | 2112.1   13.8     .7
esa  55 | .02  .00  .00   .08  -.05  -.40  -.2 2.03  .33 |   68.8 -133.2   49.6
gfz  49 |-.05 -.04 -.02   .12   .10  -.21  -.2  .11  .11 | 2114.1   14.3     .6
igp  n/a| .02 -.01  .01   .14  -.23  -.06  -.3  .17  .10 |    -.2    2.5     .8
jpl  37 | .01  .02  .01   .00  -.18   .09   .3  .09  .09 | 2113.4   14.7     .7
ngs  45 | .01 -.05  .04  -.13   .21  -.32  -.3  .16  .16 |     .1   -2.5   76.8
sio  115|-.01  .02  .00   .23  -.18  -.11   .0  .13  .13 |     .0     .0     .0

Table 2.0850.1   GPS week: 0850   Day: 1   MJD: 50195.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 | .01  .02  .01  -.49   .03  -.28   .0  .11  .06 |   -5.5    7.8    1.5
emr  31 | .00 -.01 -.01   .50  -.25   .34   .0  .11  .11 | 2123.4   26.7     .7
esa  55 | .01  .00  .00  -.06   .21   .31  -.1  .14  .09 |  -23.7    3.9   24.1
gfz  48 |-.04 -.05 -.02   .11   .01  -.09  -.1  .11  .11 | 2124.7   26.6     .6
igp  n/a| .01 -.01  .00   .30  -.13   .20  -.1  .17  .07 |   -1.7    -.3     .8
jpl  37 | .00  .02  .00  -.17   .01   .12   .2  .13  .13 | 2124.1   27.2     .7
ngs  47 |-.01 -.06  .02   .33   .32  -.42  -.5  .16  .16 |   -4.8     .2   79.3
sio  112| .00  .02  .00   .13  -.18  -.08   .0  .08  .08 |     .0     .0     .0

Table 2.0850.2   GPS week: 0850   Day: 2   MJD: 50196.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 | .01  .02  .00  -.39   .10  -.09   .0  .06  .05 |   -8.4    3.3    2.4
emr  28 | .00 -.02 -.01   .69  -.03   .47  -.2  .10  .10 | 2151.2   20.0    1.0
esa  54 | .00  .00 -.01   .03  -.23  -.80   .2  .19  .10 |  -11.1   14.9   24.4
gfz  42 |-.05 -.05 -.01   .25   .06  -.40  -.3  .14  .14 | 2152.2   20.0    1.0
igp  n/a| .00  .00 -.01   .30   .35   .09  -.4  .09  .09 |   -1.4    1.7    1.1
jpl  37 | .02  .01  .01  -.04   .11   .33   .1  .07  .06 | 2151.9   20.4    1.0
ngs  42 |-.01 -.04  .03  -.38   .12  -.45  -.2  .15  .15 |   -6.6   14.0   78.8
sio  109| .00  .02 -.01  -.02  -.22   .02  -.1  .09  .09 |     .0     .0     .0

Table 2.0850.3   GPS week: 0850   Day: 3   MJD: 50197.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .00  .02  .01  -.29   .02  -.15   .1  .06  .05 |   -4.9   -1.9    2.6
emr  28 | .00 -.03  .00   .64   .14   .57  -.1  .10  .11 | 2171.9   29.6    1.1
esa  50 | .00  .00 -.02   .08   .09  -.25   .1  .12  .09 |   15.9   -8.8   24.2
gfz  43 |-.05 -.06 -.01   .36  -.06  -.30  -.3  .15  .14 | 2173.0   29.7     .9
igp  n/a| .00 -.01  .00   .47  -.21   .10  -.2  .08  .06 |    1.7   -1.0    1.1
jpl  28 | .01  .01  .00  -.15  -.06   .12   .2  .07  .07 | 2172.9   30.4    1.1
ngs  42 |-.01 -.04  .03  -.13   .36  -.07  -.4  .16  .17 |   -4.7    -.9   79.7
sio  106| .00  .02 -.01   .03  -.23  -.12  -.1  .08  .08 |     .0     .0     .0

Table 2.0850.4   GPS week: 0850   Day: 4   MJD: 50198.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  62 | .00  .01  .01  -.52   .03  -.30   .0  .06  .05 |     .2   -3.2    4.0
emr  27 | .00 -.03  .00   .71  -.07   .66   .1  .11  .11 | 2203.4   22.6    1.2
esa  50 | .01  .00  .00  -.05   .29   .04   .1  .11  .09 |   11.4  -15.3   24.2
gfz  42 |-.05 -.05 -.02   .14   .14  -.35  -.2  .17  .14 | 2204.8   22.7    1.0
igp  n/a| .01  .01  .00  -.34  -.26  -.13  -.4  .10  .09 |    9.1  -15.3    1.4
jpl  37 | .01  .01 -.01   .15  -.10   .31   .1  .07  .07 | 2204.0   22.9    1.2
ngs  41 | .00 -.04  .03   .23   .43  -.76  -.4  .17  .17 |   -4.1    6.0   77.4
sio  104| .00  .03  .00  -.21  -.22  -.08   .0  .08  .08 |     .0     .0     .0

Table 2.0850.5   GPS week: 0850   Day: 5   MJD: 50199.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .01  .02  .01  -.41   .05  -.32   .0  .08  .06 |   -5.7    4.0    3.5
emr  29 | .00 -.03 -.01   .78  -.23   .78  -.1  .14  .14 | 2224.1   31.3    1.0
esa  49 | .01  .00  .00  -.11   .14  -.15  -.1  .13  .09 |  -15.6   10.1   24.4
gfz  44 |-.05 -.05 -.02   .24   .21  -.11  -.1  .16  .13 | 2226.3   31.2    1.0
igp  n/a| .01  .01 -.01   .26  -.53  -.16   .5  .10  .08 |     .8   -1.7    1.6
jpl  30 | .01  .02  .00  -.05   .00   .26   .1  .08  .08 | 2225.7   32.0    1.0
ngs  43 |-.01 -.06  .00   .33   .24  -.76  -.3  .18  .18 |   -3.4    5.3   77.0
sio  105|-.01  .02  .00   .05  -.22  -.01   .0  .08  .08 |     .0     .0     .0

Table 2.0850.6   GPS week: 0850   Day: 6   MJD: 50200.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .00  .02  .01  -.23   .05  -.06   .0  .07  .05 |  -10.3     .2    1.9
emr  29 | .01 -.03 -.01   .52  -.05   .74  -.1  .13  .13 | 2256.4   15.1     .8
esa  47 | .01  .00 -.01  -.11  -.12  -.58  -.1  .18  .10 |  -15.8  -20.8   24.3
gfz  44 |-.04 -.05 -.02   .24   .21  -.25  -.2  .13  .12 | 2257.2   15.9     .6
igp  n/a| .00 -.01  .00   .29  -.04  -.15  -.4  .10  .08 |     .7   -2.2    1.1
jpl  30 | .00  .01  .01  -.19   .07   .47   .1  .09  .09 | 2257.2   16.4     .8
ngs  42 | .00 -.05  .01   .09   .38  -.49  -.6  .17  .17 |    -.8   -6.5   78.5
sio  110| .00  .03  .00   .05  -.29  -.19   .1  .09  .09 |     .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 3.0850.0   GPS week: 0850   Day: 0   MJD: 50194.0

               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  |   4  12  10   9   7   6  10   9    3 |    4  15   9  11  10   6  15   8    7
   2  |   6   8   7  13   7   6  19   7    4 |    4   7   8   8   5   7  13  12    6
   3  |   9  11 ---  18  38  11  13  10    5 |   10  11 ---  18  33  11  18  11    8
   4  |   4   9  10   9   9   9  11  20    4 |    4  11  10  12  10   8  13  19    7
   5  |   5   7   6   7   5   4  12   6    3 |    4  12   9   9   7   6  13   9    6
   6  |   6   6   8  16  13   5  25   7    4 |    4   7   8  10  12   4  23   4    4
   7  |   2   7  15   7   6   7  25  15    4 |    4   8   9  11   9   6  15  12    4
   9E |   6   8   9  12   7   6  11   9    4 |    9  16  12  16  14  11  16  11   10
  14  |   5   8   5   8   6   5  14  14    3 |    8  11   9  10  10   7  12  14    8
  15  |   7  10   9  11  13   8  14  14    4 |    7   6   9  11  11   6  14  13    4
  16  |  24  36  62 ---  54  27 --- ---   20 |   85  92  82 ---  99 103 --- ---   87
  17  |   6  16   7  14  12   7  18   8    4 |    5  13   8  14   7   7  18   8    6
  18  | ---  29 993 --- --- --- ---  37   33 |  ---  18 762 --- --- --- ---  48   28
  19E |   8  12  19  15   7  13  17  17    6 |    9  11  15  16  10   8  19  14    7
  20  |   5   8   7   7   6   4  10   7    3 |    4  12   7   8   6   5  13   9    6
  21  |   4  10   6   9   7   5  12   9    3 |    6  15   9  11   7   9  15   8    7
  22  |   4   6   9   8  11   6  11   9    3 |    4   6   9   9  12   5  11   7    5
  23  |   7   9   6   6   6   7  22   7    4 |    7  13  10   9   7   9  17   9    7
  24  |   4   8  10   9   8  11  12  17    4 |    6  10  12  14  10   6  15  12    7
  25E |   5  11  12  11  14   6  15   9    4 |    8  15  12  19  12  10  18  11   10
  26  |   6   8  13   9   7   8  23  10    4 |    7  12  18  11  12   8  24   9    9
  27E |   8  10  19  18   8   9  22  12    5 |   16  17  20  21  17  17  24  16   15
  28  |   5   9  13  10  24   9  12   7    4 |    4   7   9  12  25   6  15   6    4
  29  |   5   6   9   9   5   8  14  11    3 |    4   9  11  10   8   6  18  12    6
  31  |   4   8  19  12  13   9  11  12    4 |    5   7  12  12  11   7  13  13    5
------|--------------------------------------|--------------------------------------
 RMS  |   7  13 203  11  17   9  16  13      |T  18  21 156  12  23  22  16  14   19
 WRMS |   5  12  33  11  10   9  16  13      |NE 19  22 171  11  25  24  15  15   20

Table 3.0850.1   GPS week: 0850   Day: 1   MJD: 50195.0

               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  |   4   8  10   8   7   6  16   7    3 |    4   7  11  10   8   4  13   7    5
   2  |   5   7   6   8   6   6  25   7    4 |    4   7   8   8   7   7  20   5    4
   3  |   7  11 ---  16  13   8  15   9    5 |    7  11 ---  17  15   8  17   8    7
   4  |   5   7  14   9   5   6  17   8    4 |    4   8  14  13  11   6  19   7    7
   5  |   5   4   7   7   4   7  13   5    3 |    4   7   7   8   6   4  12   6    3
   6  |   4  12   7  12   7   6  22   6    4 |    3  10   7  11   8   4  16   7    4
   7  |   5   9   9   8   3   6  20   9    4 |    3   9  12  11   7   4  25   6    6
   9E |   7   9   9  13   5   6  12   6    3 |    9  16  12  19  12   9  16   9   10
  14  |   6   6   4   5   4   5  12   8    3 |    6   6  12   8   7   5  15   6    5
  15  |   7  11   7  12   8   7  17   9    4 |    4   9  11  11  10   6  12   6    5
  16  |  45 ---  46 ---  78  54 --- ---   34 |  175 --- 143 --- 181 187 --- ---  169
  17  |   5  19  10  14   9   7  15   5    5 |    4  21   8  14   6   7  16   4    5
  18  |   6   6  20   9  15 --- ---  10    5 |    3   9 244  11  14 --- ---  20   15
  19E |   7  13   8  16   6   9  15  12    5 |    8  11  14  24  12   6  18   7    8
  20  |   5  24   7   9   4   7  12  12    5 |    3  22   6   9   7   5  12   8    4
  21  |   5   8   7   8   6   5  13  10    3 |    4  11  11   9   6   7  13   6    5
  22  |   5   9   6  11   4   6  12   7    3 |    5  10  12   8   7   5  11   4    5
  23  |   8  10   7   7   5   9  19   7    4 |    6  13  11  10   7   9  15   7    6
  24  |   5   9  17  15   6   6  24   8    5 |    5  12  11  18  10   6  23   8    7
  25E |   7  14  11  13   9   7  22   6    4 |    9  14  11  17  10   6  19   4    8
  26  |   6  13  12  10   8   6  15   8    4 |    6  17  22  11  12   5  18   6    8
  27E |   8  11   8  20   8   7  11  11    5 |   10  13  15  24  12   9  15   8    9
  28  |   5   9  14   9   6   7  14   7    4 |    3   9  11  13   9   6  16   4    6
  29  |   5   5   8   7   4   4  11   5    2 |    4   8  11  11  10   4  15   6    6
  31  |   5   8  16  10   6   6  14   7    4 |    5  10  13  11   7   6  14   4    5
------|--------------------------------------|--------------------------------------
 RMS  |  11  11  14  11  17  13  16   8      |T  35  11  58  13  37  38  16   7   34
 WRMS |   6  11   9  11   7  13  16   8      |NE 38  11  64  11  40  42  16   7   37

Table 3.0850.2   GPS week: 0850   Day: 2   MJD: 50196.0

               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   8   9   9   8   5  12   7    3 |    4   9   8  10   8   6  15   5    5
   2  |   6   8   8  10   4   4  16  10    3 |    5  10   8   9   5   6  18   4    5
   3  |   8   9 ---  17  12   9  21   8    5 |    8  11 ---  19  14   9  18   7    7
   4  |   4   6   8  10  10   5  18   7    3 |    4   9  11  15   8   6  14   7    6
   5  |   5   6   8  10  11   3  13  14    3 |    3  10   7   8   7   5   9  14    4
   6  |   5   9  10  14   5   4  18   6    4 |    5  12   6  14   8   6  14   3    6
   7  |   4   7   9  10   7   5  13   7    3 |    4   8  13  10   8   5  10   4    5
   9E |   6   9  12  18  10   7  18   7    4 |    9  17  14  21  15   9  22   9   11
  14  |   5   9  10   9   6   4  12   8    3 |    6   9   9   9   9   6   9   8    6
  15  |   5  11   9  11   3   6  12   9    3 |    4   7  10  11   8   6  12   6    4
  16  |  13  26  80  39  16  13 ---  14   14 |  224  93 174   0 223 210 ---   1  210
  17  |   5  14  12  16   9   7  16   8    4 |    5  16  10  16   7   5  16   5    5
  18  |   5   6  15   9   7 ---  14  10    4 |    3   9  90  11   7 ---  11  10    8
  19E |   9   7  11  13  17  10  19  11    4 |    8  12  12  19  17   9  22   6    8
  20  |   4   6   9   8   9   4  10   8    3 |    4  10   8   9  10   4   9   6    4
  21  |   4   8   6   9  12   7  11   8    3 |    7  10  10   8  12   9  14   5    7
  22  |   4   5  12   8   9   6  10   7    3 |    4   7  11  10   8   4  14   4    5
  23  |   4  13  10   6   7   8  20   8    4 |    6  14  11   8  10   7  16   6    6
  24  |   7   9  11  11   8   6  18   8    4 |    4  14  11  17  11   6  18   6    7
  25E |   5  10  14  14   9   6  19   8    4 |    8  13  12  20  13   8  22   8    9
  26  |   5   7  14   9   7   7  12   7    3 |    6   8  15  13  10   6  11   5    5
  27E |   7   7   8  21  10   9  12  11    4 |   11  13  13  26  13  15  15  10   11
  28  |   7   7  10  10   7   5  14   5    3 |    5   8   9  13  12   6  17   7    6
  29  |   5   5  10   9   7   4  10   5    3 |    3   9  10  11   8   4  12   7    5
  31  |   6   9  11  11  10   6   8   7    3 |    8   7  10  13   7   6  11   5    4
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  19  14   9   7  15   9      |T  45  21  41  14  45  43  15   6   42
 WRMS |   5  10  10  14   9   6  15   9      |NE 49  22  44  11  49  47  13   6   46

Table 3.0850.3   GPS week: 0850   Day: 3   MJD: 50197.0

               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  |   3   9   9  14   3   5  13   6    3 |    4   8   9  11   7   5  15   6    4
   2  |   5   9  12  11   4   5  21   9    4 |    3   9   9   8   6   7  15   6    4
   3  |   7  10 ---  19  12   9  17   7    5 |   12  13 ---  19   9  13  19  11   10
   4  |   4   6   9  14   8   4  15   9    3 |    5   9  10  12   9   5  15   5    5
   5  |   4   6   5   8   6   5  12   6    2 |    3   7   5   9   7   6  12   8    4
   6  |   4   8   8  16   8   5  21   9    4 |    4  10   7  14   7   4  21   5    4
   7  |   3   7  12   9   5   5  20  10    4 |    6   7  11  11   9   6  17   5    5
   9E |   5   9  10  18   6  10  17   8    4 |    9  16  13  18  12   9  22  10    9
  14  |   7   7   9  10   4   3  11   9    3 |    7   9   8  10   8   5   9   7    5
  15  |   5  14   7  11   7   6  13   7    4 |    4  10  11  12  10   5  11   4    5
  16  |  14  24  40  32  14  16  21  13    9 |   92  93  82  34  91  89  38  90   88
  17  |   6  17   6  18   6   7  15   6    4 |    4  14   7  16   7   5  16   6    5
  18  |   5   8  13  12   9   5   9   8    3 |    2  12  50  12   8   3  11   8    7
  19E |  12  12   9  20  13  13  17   9    5 |   10  12  11  25  11   8  21   8    8
  20  |   4  10   7  12   4   3  11   4    3 |    4  11   7  12   8   4  11   4    4
  21  |   4   8   6   9   6   6  13   7    3 |    4   9   9   9   7   8  16   7    6
  22  |   5   9   7  12   5   5  17   5    3 |    3  10   7  11   7   4  11   6    3
  23  |   6  13   6   6   7   7  19   7    4 |    6  12  11   9   5   7  16   7    7
  24  |   4   9   8  12   7   6  21   9    4 |    6  13   9  17  13   5  17   6    6
  25E |   8  14   9  16  11   6  17   6    4 |    7  14  13  19  10   8  20   8    8
  26  |   7   7  12  10   7   8  11   8    3 |    6   9  13  13  12   7  13   5    6
  27E |   6   8   8  28   6   9  24   7    5 |   13  15  15  33  16  15  20  11   13
  28  |   4   8  11  10   7   6  14   5    3 |    6  10   9  12  11   3  16   7    5
  29  |   6   5   9   8   5   5  10   5    3 |    4   9   9  13   8   5  11   6    5
  31  |   6   6  11  14   9   6  10   8    3 |    7   8  11  13   9   4  11   7    4
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  12  15   8   7  16   8      |T  19  21  21  16  20  19  17  19   18
 WRMS |   5  11   9  14   6   7  17   8      |NE 20  22  23  14  21  20  16  20   19

Table 3.0850.4   GPS week: 0850   Day: 4   MJD: 50198.0

               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  |   3   8   9  13   5   7   9   6    3 |    3   9   8  13   5   6  12   5    4
   2  |   6  12   6  12  10   6  17   7    4 |    5   9   9   8   7   6  15   5    4
   3  |   8  10 ---  19  22   8  13   9    5 |    8  12 ---  17  18   9  16  10    8
   4  |   2   7   9  14   7   4  20  12    4 |    4   8  12  12   9   4  20  12    5
   5  |   4   8   6  10   5   3   8   7    3 |    3  10   6   9   6   5   9   5    4
   6  |   6  12  14  23   5 ---  19   7    5 |    4  10  10  10   6 ---  14   4    4
   7  |   3   7  11  17  19   5  21  12    4 |    4   8  11  12  16   4  14   7    4
   9E |   8  10  10  15   8   8  19  10    4 |   10  15  13  21  10  11  21  10    9
  14  |   4  10   5   9   7   6   9   8    3 |    7   9   9  10  10   6  12   6    5
  15  |   6  17  12  10  10   7  20   7    4 |    5  12  13  12  14   5  17   5    6
  16  |   9  20  22  37  15  13  22  15    7 |  140 138 125  60 139 140  52 138  137
  17  |   6  18   8  16  10   6  16   9    4 |    5  11   7  16  11   7  18   7    5
  18  |   4  15   7  17   7   7  15   7    4 |    3  18  55  15   7   5  11   7    7
  19E |   9  11   9  23   4  11  18   9    5 |   10  10  11  30   8   9  21   5    8
  20  |   6  12   6   9   7   4  12   4    3 |    6  10   5   9   7   2   9   4    3
  21  |   4   6   7  13   7   6   9   8    3 |    4   7   9  10   7   8  12   5    5
  22  |   4   6  10   8   8   3  21   6    3 |    3   9  10  10   8   4  14   3    4
  23  |   7  12   8   7  11   6  23   7    4 |    4  11   9   8   9   8  16   6    5
  24  |   4   8  11  13   7   6  20   9    4 |    4  13  14  15   9   5  20   6    6
  25E |   5  13  14  16  10   7  20   7    4 |    6  13  13  18  11   8  24   7    6
  26  |   8  11  12  13   9   5  21   8    4 |    8  11  13  15  10   5  19   5    5
  27E |   9   6   9  26  12   9  17   6    5 |   13  13  14  33  14  13  21  11   13
  28  |   5   6  11   9   9   6  19   6    3 |    4   8  10  11  13   9  15   4    6
  29  |   3   7   9  13   7   6  18   5    3 |    5   7   8  11   8   7  15   5    4
  31  |   6   6  13  13  12   6  11   7    3 |    4   7  12  12  12   6  13   5    4
------|--------------------------------------|--------------------------------------
 RMS  |   6  11  11  17  10   7  17   8      |T  28  29  29  19  29  29  19  28   28
 WRMS |   5  11   9  14   9   7  17   8      |NE 30  31  31  17  31  31  18  30   30

Table 3.0850.5   GPS week: 0850   Day: 5   MJD: 50199.0

               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  |   3   7   7  13   8   6  14   6    3 |    3   7   7  10   6   3  15   7    4
   2  |   7   8  10   9   8   4  19   9    4 |    5   9   7  11   7   7  20   8    5
   3  |   6  10 ---  15  17   9  23   7    5 |    8  13 ---  18  16  10  22   7    8
   4  |   5   6   6  11  11   6  24   7    4 |    4   9   8  12   7   5  15   8    4
   5  |   5   7   5   8   5   3  12   5    2 |    5   9   6   9   6   4  13   6    4
   6  | --- ---   2 --- --- --- --- ---    0 |  --- ---   0 --- --- --- --- ---  ---
   7  |   3  10   8  11  10   5  16   8    3 |    3   9   9  11   6   5  21   6    4
   9E |   6  11  13  17   9   7  19   6    4 |   11  16  16  25  17  11  26  11   12
  14  |   6   9   6  12   6   4   9   8    3 |    6  12  10  12   6   6  11   7    6
  15  |   4  15   7  11   8   4  13   7    3 |    4   9   7  13   9   3  15   6    4
  16  |  27  46  42  38  27  27  39  22   14 |  131 131  99  37 115 117  48 114  119
  17  |   6  12   5  17   6   6  15   6    4 |    4  10   7  17   5   4  14   8    4
  18  |   6   8   9  18   7   4  12   4    3 |    3  11  49  15   5   4  14   9    6
  19E |   9  16  12  30  11  10  14   9    6 |   11  11  11  35   6   7  23   9    9
  20  |   3  11   6  10  10   7  12   4    3 |    7  10   6   9   8   3  11   5    4
  21  |   4   7   8  13   5   5  11   8    3 |    4   7   8  11   4   6  12   6    4
  22  |   4   8   7  11   6   4  18   6    3 |    4   8   9  10   8   3  14   4    3
  23  |   6  11   8   8   4   6  17   7    3 |    6   9   7   6   7   8  14   6    5
  24  |   7   7  14  15   8   8  16   7    4 |    3  11  14  15   8   6  14  10    5
  25E |   7  14  12  24  13   8  23   7    5 |    9  18  14  23  11   8  24   8    9
  26  |   8   9  10  11   8   6  15   8    4 |    8  11  15  14  15   6  15   6    8
  27E |  10  11  11  24  12   7  11   7    5 |   14  17  19  26  16  12  20  12   13
  28  |   6   8   7   9   7   5  16   6    3 |    4  10  10  12  10   4  19   5    5
  29  |   6   8   8   9   4   4  12   5    3 |    6  10  10  12  11   4  15   5    6
  31  |   8   9  19  11   6   5  15   7    4 |    6  12  12  15   9   6  13   5    6
------|--------------------------------------|--------------------------------------
 RMS  |   8  14  13  16  10   8  18   8      |T  27  28  25  17  25  24  19  24   25
 WRMS |   6  14   9  13   8   8  18   8      |NE 29  30  26  14  27  26  18  26   27

Table 3.0850.6   GPS week: 0850   Day: 6   MJD: 50200.0

               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  |   2   8   8  10   8   5  10   7    3 |    4   9   6  10   7   4  13   7    4
   2  |   5  15  10  12   8   6  16   5    4 |    6  15  10   9   9   4  14   5    5
   3  |   5  13 ---  16  17   9  18   8    5 |    9  11 ---  18  16  11  18  11    9
   4  |   3   8  13  10   7   7  15   6    3 |    5  12  14  12  14   4  12   6    6
   5  |   6   7   7   8   4   4  21   5    3 |    3   7   7  10   5   5  16   8    5
   6  |   6 ---  11  11   9   5  17   9    4 |   17 ---  17  16  19  17  15  18   17
   7  |   4  13  10   9   8   6  19   5    3 |    4  10  10  13  11   6  14   4    4
   9E |   4   8  15  14   7   8  24   6    4 |   15  16  24  24  17  14  29  12   15
  14  |   6  10  11   8   6   6   9  11    3 |    7   7   9  11   9   5   9   6    5
  15  |   7  13  10  10  13   5  12   6    3 |    4   7   8  12  12   3  11   4    4
  16  |  22  27  71 ---  26  29 ---  24   17 |  239 246 222 --- 249 254 --- 246  241
  17  |   5  18   7  17   7   7  22   5    5 |    4  10   9  13   7   4  16   6    6
  18  |   5  12  10  15   6   6  13   7    4 |    3  12  48  12   7   5  15  11    7
  19E |   6  13  15  25   8   9  18  11    5 |   11  10  11  23  11   8  22   9    9
  20  |   4  14   7  10   5   5  12   4    3 |    5   9   7  10   6   3  11   5    4
  21  |   3   9   7   9   9   4   9   7    3 |    5   8  10  10   7   7  13   4    6
  22  |   4  12  10   9   9   3  18   6    3 |    4  14   9   9  12   4  14   6    5
  23  |   5  12   9   9   4   7  20   6    4 |    7   9  11  11   7  10  19   9    8
  24  |   6  12  12  13   9   5  15   9    4 |    5  14  11  17  12   5  17   4    6
  25E |   6  13  11  15  16   8  21  10    5 |   10  16  15  21  15  11  20  12   10
  26  |   6  15  19  10   9   7  16   6    4 |    9  19  18  12  17   6  18   7    9
  27E |   7  25  11  19   6   9  19   8    5 |   17  23  14  27  15  13  19  12   15
  28  |   4   9  15  10   9   7  15   6    4 |    6   9   9  11  12   5  16   6    5
  29  |   5   5   8  10   6   3  11   7    3 |    6  10   7  12   9   4  15   7    7
  31  |   7   7  12   9   7   7  18   6    4 |    4   9  10  13   8   6  15   5    6
------|--------------------------------------|--------------------------------------
 RMS  |   7  13  18  13  10   9  17   9      |T  48  51  47  14  51  51  16  49   48
 WRMS |   5  13  10  12   8   9  17   9      |NE 52  56  51  12  55  55  14  54   53

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 4.0850   GPS week: 0850   MJD: 50194.0-50200.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2113 |U  53   32   83 |U  53   34   87 |   32   25   60 |
emr | emr 2355 |   39   28   67 |   38   25   69 |U  24   16   42 |
esa | esa 1621 |  937  583  999 |U 797  451  999 |  992  558  999 |
gfz | gfz 1166 |   44   29   66 |U  39   30   71 |   20   19   44 |
igp | igp 2157 |   45   32   72 |   38   33   74 |   28   22   56 |
igs | igs 2385 |   40   27   68 |   39   26   71 |   23   16   44 |
jpl | jpl 2314 |U  38   27   67 |U  36   26   69 |   20   16   41 |

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 5.0850.0   GPS week: 0850   Day: 0   MJD: 50194.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2250 |   51   35   92 |   39   32   84 |   35   25   61 |
emr | emr 2394 |   31   31   67 |   28   20   70 |   28   14   43 |
esa | esa  240 |    0    0    0 |    0    0    0 |    0    0    0 |
gfz | gfz 1104 |   32   35   57 |   30   28   60 |   21   13   52 |
igp | igp 2037 |   35   34   70 |   36   32   75 |   28   14   65 |
igs | igs 2394 |   28   32   77 |   28   24   72 |   30   16   46 |
jpl | jpl 2288 |   34   31   65 |   27   24   64 |   25   14   43 |

Table 5.0850.1   GPS week: 0850   Day: 1   MJD: 50195.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2189 |   48   30   78 |   54   28   93 |   33   26   67 |
emr | emr 2293 |   27   22   59 |   40   22   68 |   26   16   40 |
esa | esa 1823 |  968  647  999 |  894  550  999 |  999  580  999 |
gfz | gfz 1152 |   27   21   54 |   40   26  110 |   20   19   36 |
igp | igp 2184 |   35   26   57 |   42   25   78 |   28   15   56 |
igs | igs 2400 |   28   23   56 |   40   24   77 |   24   15   50 |
jpl | jpl 2288 |   25   23   57 |   36   25   79 |   22   14   47 |

Table 5.0850.2   GPS week: 0850   Day: 2   MJD: 50196.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2116 |   45   39   92 |   50   27   76 |   32   21   56 |
emr | emr 2395 |   34   32   73 |   38   18   59 |   22   15   45 |
esa | esa 1872 |  918  561  999 |  750  443  999 |  999  597  999 |
gfz | gfz 1200 |   38   27   74 |   43   26   52 |   19   19   50 |
igp | igp 2338 |   38   32   71 |   40   20   62 |   25   20   51 |
igs | igs 2400 |   36   32   73 |   37   18   56 |   21   15   45 |
jpl | jpl 2281 |   32   31   74 |   36   19   55 |   21   16   43 |

Table 5.0850.3   GPS week: 0850   Day: 3   MJD: 50197.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2233 |   72   28   86 |   53   35   82 |   31   28   61 |
emr | emr 2398 |   61   28   71 |   34   28   77 |   22   17   45 |
esa | esa 1891 |  906  582  999 |  764  373  999 |  956  491  999 |
gfz | gfz 1200 |   75   28   71 |   40   35   91 |   19   19   48 |
igp | igp 2398 |   63   28   77 |   34   32   76 |   22   17   49 |
igs | igs 2400 |   64   26   74 |   37   28   77 |   23   19   48 |
jpl | jpl 2384 |   61   28   71 |   32   27   71 |   17   17   40 |

Table 5.0850.4   GPS week: 0850   Day: 4   MJD: 50198.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1880 |   54   33   70 |   71   42  102 |   27   22   54 |
emr | emr 2398 |   34   31   74 |   52   32   90 |   21   15   37 |
esa | esa 1847 |  902  592  999 |  798  438  999 |  999  516  999 |
gfz | gfz 1200 |   36   38   88 |   36   38   56 |   20   17   33 |
igp | igp 1779 |   37   31   65 |   34   37   85 |   27   20   56 |
igs | igs 2400 |   36   31   73 |   56   33   87 |   19   14   38 |
jpl | jpl 2286 |   34   30   72 |   54   38   92 |   17   17   34 |

Table 5.0850.5   GPS week: 0850   Day: 5   MJD: 50199.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2017 |   44   30   87 |   52   35   83 |   33   33   60 |
emr | emr 2303 |   31   26   62 |   38   27   55 |   24   21   38 |
esa | esa 1843 |  999  538  999 |  815  496  999 |  999  561  999 |
gfz | gfz 1152 |   38   28   56 |   42   30   57 |   22   24   41 |
igp | igp 2161 |   45   39   89 |   44   47   79 |   36   38   56 |
igs | igs 2304 |   34   24   63 |   35   26   56 |   21   21   40 |
jpl | jpl 2288 |   33   24   63 |   33   23   54 |   18   20   41 |

Table 5.0850.6   GPS week: 0850   Day: 6   MJD: 50200.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2106 |   55   28   70 |   49   35   89 |   33   21   62 |
emr | emr 2304 |   47   23   64 |   34   25   60 |   25   16   48 |
esa | esa 1829 |  922  574  999 |  754  380  999 |  999  593  999 |
gfz | gfz 1152 |   45   16   51 |   38   22   46 |   17   18   42 |
igp | igp 2200 |   53   30   70 |   35   33   61 |   28   22   56 |
igs | igs 2400 |   44   21   59 |   33   24   65 |   23   13   41 |
jpl | jpl 2384 |   37   19   63 |   31   22   56 |   21   12   40 |

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