Subject: [IGSREPORT-2465] Wk 0841 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 5 Mar 1996 18:40:39 PST

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IGS Electronic Report    Tue Mar  5 18:40:39 PST 1996      Message Number 2465
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0841 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0841   (Feb 18, 1996 - Feb 24, 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 (IGS08417.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:

 IGS08410-6.SP3  IGS GPS ephemeris files for days 0-6, week 0841 in SP3 format.
 IGS08417.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08417.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. 

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
           -------------+----------+---------+------------------
            3 (Feb 21)  |    31    |   GFZ   |  up to ~ 240 ns          

5. There was a maneuver of PRN09 on day 5 (Feb 23) (ref. NANU 031-96040).
   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 PRN09 were excluded from the long arc evaluation on 
   day 5 due to unrealistic RMS caused by the maneuver.

6. Some orbit solutions were excluded from the combination because they were
   biasing the weighted average (generally indicated by long arc RMS). 
   They were still used for statistics computation.  The following table 
   lists the exclusions:

                     Day (Date)  | PRN  | Centres  
                    -------------+------+--------
                       (Feb   )  |      |         

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

          Day (Date) |   TIME   | PRN | Centres  | Reason
         ------------+----------+-----+-------------------------------------
          1 (Feb 19) | 00:00:00 | 26  |   ALL    | Modeling problems
          2 (Feb 20) | 00:00:00 | 23  |   ALL    | Modeling problems
          3 (Feb 21) | 00:00:00 | 16  |   ALL    | Modeling problems
          6 (Feb 24) | 00:00:00 | 09  |   ALL    | Maneuver

8. PRN16 is to be used with caution on day 0 (Feb 18). PRN16 was set unhealthy
   until day 3 (Feb 21/16:48 UT). See ref. NANU 037-96052. Note that on day 0
   in the long arc evaluation, PRN16 was excluded for cod, gfz, igp, jpl, sio
   and igs  because of unrealistic long arc RMS.

9. 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.

10.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.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08417.SUM).

Table 1: Week 0841 summary.                       (Feb 18, 1996 - Feb 24, 1996)

Table 1.0841.a   GPS week: 0841   MJD: 50131.0-50137.0

         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  .02 -.01  -.25   .09   .10   .1  .07  .06 |   -2.6     .0    1.7
        | .01  .01  .00   .19   .09   .12   .1           |    8.7   10.8
emr  28 | .00  .00  .00   .37  -.11   .45  -.3  .10  .09 |  891.9   10.1     .9
        | .01  .01  .01   .24   .15   .17   .1           |   26.6    8.2
esa  54 | .00 -.02 -.01   .02   .16  -.32   .1  .11  .10 |   12.0   -8.9    2.0
        | .00  .01  .01   .26   .13   .26   .2           |   11.9   11.3
gfz  45 |-.04 -.04 -.01   .22  -.26  -.36  -.2  .47  .48 |  894.6    8.6    5.0
        | .01  .00  .01   .08   .12   .09   .1           |   27.4    8.7
igp  n/a| .01 -.01 -.01   .26  -.13   .22  -.1  .08  .07 |     .9   -1.9    1.0
        | .01  .00  .01   .10   .26   .22   .1           |     .9    1.0
jpl  37 | .01  .01  .00  -.15   .08  -.02   .1  .06  .06 | -479.0  -52.1     .9
        | .00  .01  .00   .15   .06   .07   .0           | 1734.7   81.9
ngs  44 |-.01 -.05  .02  -.04   .22  -.04  -.1  .15  .15 |    1.0   -3.2   76.9
        | .01  .01  .01   .22   .13   .37   .2           |    7.0   10.4
sio  114| .00  .02  .01   .16  -.13  -.10   .2  .08  .08 |     .0     .0     .0
        | .00  .01  .01   .09   .08   .20   .2           |     .0     .0

Table 1.0841.b   GPS week : 0841   MJD: 50131.0-50137.0

         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  |   4   3   4   3   3   3   3 |
   2  |   3   3   4   3   3   3   2 |
   4  |   4   3   3   3   3   3   2 |
   5  |   3   2   3   2   3   3   2 |
   6E |   3   3   3   3   4   4   3 |
   7E |   5   4   4   4   3   4   4 | Maneuver on day 5.
   9  |   3   3   2   2   3   0   3 |
  12  |   6   4   4   3   4   4   4 |
  14  |   3   3   3   3   4   3   3 |
  15  |   4   3   3   2   3   3   3 |
  16  |  26   4   4   4   3   3   3 | Modeling problems on day 0.
  17  |   4   3   2   3   3   3   3 |
  18  |   3   3   3   3   3   3   3 |
  19  |   2   3   2   2   2   2   2 |
  20  |   3   3   2   3   4   3   2 |
  21  |   4   3   3   3   3   4   3 |
  22  |   3   3   3   3   3   3   3 |
  23  |   3   3   4   3   4   3   3 |
  24  |   4   4   3   3   3   3   2 |
  25  |   3   3   2   4   3   3   2 |
  26  |   6   4   4   3   3   3   3 |
  27  |   2   2   2   2   2   2   2 |
  28E |   5   4   4   4   4   4   4 |
  29  |   3   3   3   3   3   3   3 |
  31E |   4   3   4   3   3   3   3 |

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

Table 2.0841.0   GPS week: 0841   Day: 0   MJD: 50131.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  66 | .01  .03 -.01  -.50   .16   .02   .2  .13  .07 |    7.2  -11.6    1.8
emr  29 | .01  .00 -.01   .67  -.14   .75  -.3  .10  .10 |  856.2    4.3    1.1
esa  56 | .00 -.01 -.01  -.08   .39  -.55   .3  .12  .12 |   20.3  -20.3    2.8
gfz  46 |-.04 -.04 -.01   .21  -.36  -.22  -.1 1.20 1.24 |  858.7    3.8    4.3
igp  n/a| .01  .00 -.03   .23   .10   .43   .0  .13  .07 |    1.4   -2.1    1.2
jpl  37 | .01  .02  .00  -.05   .00  -.12   .1  .09  .09 |-2195.9 -142.0    1.1
ngs  46 |-.01 -.04  .04  -.11   .08  -.21  -.2  .15  .15 |   14.4  -20.9   77.6
sio  114|-.01  .03  .01   .22  -.02  -.05   .3  .12  .12 |     .0     .0     .0

Table 2.0841.1   GPS week: 0841   Day: 1   MJD: 50132.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .02 -.01  -.42   .20   .26   .1  .07  .06 |   -6.5    2.5    1.7
emr  29 |-.01 -.01 -.01   .76  -.39   .36  -.4  .11  .10 |  861.9   12.5     .8
esa  57 | .00 -.03 -.01  -.01   .02  -.47  -.2  .11  .10 |   18.8  -13.1    1.8
gfz  47 |-.03 -.04 -.01   .10  -.28  -.37  -.3  .12  .12 |  864.0   13.3    5.7
igp  n/a| .01 -.01 -.01   .16   .08  -.04   .0  .08  .07 |     .7   -2.0     .8
jpl  37 | .02  .01  .00  -.10   .09   .01   .0  .06  .06 |-2337.6 -134.2     .6
ngs  46 |-.01 -.04  .03  -.08   .18  -.18   .0  .14  .13 |   -1.1    -.6   75.5
sio  112| .00  .02  .01   .17  -.09   .13   .1  .07  .07 |     .0     .0     .0

Table 2.0841.2   GPS week: 0841   Day: 2   MJD: 50133.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .02 -.01  -.38   .17   .20   .1  .06  .05 |   -1.6   -1.5    1.5
emr  30 | .00 -.02  .00   .32  -.06   .46  -.2  .09  .09 |  886.6    3.7    1.0
esa  54 | .00 -.02 -.01   .45   .05  -.59   .1  .12  .10 |   10.1    9.0    3.0
gfz  46 |-.03 -.04 -.01   .24  -.16  -.35  -.4  .11  .11 |  886.4    6.1    3.4
igp  n/a| .02 -.02 -.01   .33  -.35   .17  -.1  .07  .07 |     .1    -.9    1.0
jpl  37 | .01  .01  .00  -.18   .06   .08   .0  .06  .06 |-2461.4 -141.7     .9
ngs  46 | .00 -.04  .02  -.31   .10   .14   .2  .15  .15 |    2.6   -7.8   77.6
sio  115| .00  .01  .02   .28  -.17  -.34   .4  .07  .07 |     .0     .0     .0

Table 2.0841.3   GPS week: 0841   Day: 3   MJD: 50134.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .00  .01 -.01  -.20  -.05   .13   .2  .05  .06 |   -8.4    5.0    1.8
emr  28 |-.01  .01 -.01   .23  -.04   .30  -.3  .10  .09 |  891.4    8.5     .8
esa  54 | .00 -.02 -.01  -.17   .13  -.41   .0  .10  .09 |    5.0  -16.7    1.4
gfz  44 |-.04 -.04 -.01   .23  -.45  -.37  -.4  .12  .12 |  895.2    6.4    7.7
igp  n/a| .00 -.02 -.01   .33  -.62  -.13  -.2  .08  .06 |     .7   -1.0    1.0
jpl  37 | .02  .02  .00   .11   .19   .04   .1  .06  .06 |  892.2    9.3     .8
ngs  44 | .01 -.05  .04  -.17   .21   .63  -.2  .13  .13 |   -1.2   -1.9   75.8
sio  116|-.01  .02  .02   .09  -.06  -.36  -.1  .09  .09 |     .0     .0     .0

Table 2.0841.4   GPS week: 0841   Day: 4   MJD: 50135.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .00  .01 -.01  -.05   .09   .05   .1  .05  .05 |   -9.1    8.0    1.8
emr  26 | .00  .01  .01   .19  -.08   .28  -.2  .09  .08 |  900.5   21.3     .9
esa  53 | .00 -.02  .00  -.33   .18  -.12   .1  .11  .11 |   17.7   -7.4    1.5
gfz  42 |-.05 -.04  .00   .36  -.29  -.37  -.4  .13  .13 |  903.9   18.7    4.1
igp  n/a| .01 -.02 -.01   .41  -.02   .31  -.3  .07  .07 |    1.3   -3.7    1.0
jpl  37 | .01  .02  .00  -.23   .05  -.05   .1  .06  .06 |  901.3   21.9     .8
ngs  43 |-.01 -.04  .00  -.11   .22   .12  -.4  .17  .16 |   -6.1   11.6   77.4
sio  113| .00  .02  .00   .25  -.18  -.11   .1  .09  .09 |     .0     .0     .0

Table 2.0841.5   GPS week: 0841   Day: 5   MJD: 50136.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .00  .01 -.01  -.08   .06  -.10   .1  .05  .05 |   11.4  -16.5    1.5
emr  28 | .01  .01  .01   .15   .10   .61  -.1  .10  .09 |  926.1     .3     .8
esa  53 | .00 -.01  .01   .25   .07  -.20   .2  .11  .11 |   23.0  -17.6    1.3
gfz  44 |-.05 -.04  .00   .16  -.12  -.29  -.2  .13  .13 |  930.5   -6.0    3.3
igp  n/a| .01 -.02 -.01   .23  -.09   .36  -.1  .08  .07 |    2.4   -2.4    1.0
jpl  37 | .02  .02  .00  -.35   .12  -.03   .0  .06  .06 |  926.8    1.3     .9
ngs  43 |-.02 -.06  .01   .21   .35  -.48  -.1  .16  .16 |    4.0   -7.8   76.1
sio  114| .00  .02  .01   .06  -.19   .12   .2  .07  .07 |     .0     .0     .0

Table 2.0841.6   GPS week: 0841   Day: 6   MJD: 50137.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 |-.01  .01 -.01  -.08   .03   .10   .0  .05  .05 |  -11.0   14.1    1.8
emr  29 | .01  .01  .00   .24  -.17   .38  -.3  .09  .09 |  920.4   20.2    1.0
esa  53 | .01 -.01  .00   .04   .27   .12   .0  .11  .10 |  -11.0    3.9    1.7
gfz  43 |-.05 -.04 -.01   .27  -.18  -.52   .0  .14  .14 |  923.4   17.6    5.3
igp  n/a| .01 -.01 -.01   .13  -.01   .42  -.2  .07  .06 |    -.2   -1.4    1.1
jpl  37 | .01  .01  .00  -.26   .07  -.07   .1  .05  .05 |  921.3   20.8    1.0
ngs  43 |-.01 -.06  .01   .31   .44  -.33  -.1  .15  .15 |   -5.9    5.3   78.4
sio  116| .00  .02  .01   .08  -.23  -.07   .1  .06  .06 |     .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 3.0841.0   GPS week: 0841   Day: 0   MJD: 50131.0

               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  14  13   8   7   5  11   8    4 |    8  16  14  13  14   9  14   9   11
   2  |   7   5   9   9   6   6  12   8    3 |    3   9  13  13   9   6  17   5    8
   4  |   4  14  10   7   7   9  12   9    4 |    4  12  13  12  10   5  17   7    7
   5  |   4   5  12   6   6   5  11   9    3 |    6   7  10   8   9   6   8  12    5
   6E |   4   8  16  11   8   6  11   9    3 |   11  17  12  17  15  13  14  14   12
   7E |  11  11  13  21   9   7  13   9    5 |    8  11  14  23  10   4  25   4   11
   9  |   7   5   8   8   5   5  13  11    3 |   54  56  55  47  59  51  54  59   54
  12  |   4 --- --- ---  11 ---  12  13    6 |    7 --- --- ---  17 ---  14  10   10
  14  |   4   8  12  10   4   6  16   9    3 |    4   8  17  18  11   7  14   6    8
  15  |   4   7  18  10   4   6  15  10    4 |    4   7  17  12  11   7  17   6    7
  16  |  50 --- --- 584  48  32 ---  22   26 |    0 --- ---   0   0   0 ---   0  ---
  17  |   4  12  11  10  12   7  17  11    4 |    6  12  12  13  15   7  16   6    9
  18  |   5  10   9  10   7   4   9   6    3 |    8  11  15  13  10   8  12   7    8
  19  |   6   7  10   6   4   5   9   7    2 |    5  10  10  10   8   7  11   7    7
  20  |   4   7  11   6   6   7  11   7    3 |    5   9  10  10   8   9   9   6    6
  21  |   5  12  11   9   9   8  13  13    4 |    5  15  15  14   9   7  16  11    8
  22  |   4   8  12  10   6   4  15  11    3 |    4  13  15  11   8   4  19   8    6
  23  |  11   5  10   6  14   7  10   6    3 |   29  27  29  27  35  27  26  27   28
  24  |  10   9  17  10   7   6  21  13    4 |    6  13  16  13  13   6  25   9    8
  25  |   7   7  11   5   8   4  15  11    3 |    6   8  13   7   8   5  10   5    6
  26  |  18  11  13  21  13   8 ---  15    6 |    2  19  20  19  16  21 ---   1   13
  27  |   5   6   8   5   6   4   8   9    2 |    6  11  12  10   9   7  12   6    8
  28E |   6  12  13  12   4   7  28  13    5 |    7  14  14  17  12   6  22   7    9
  29  |   6  11   9   9   6   8  11   5    3 |    5  14  13  11   8   5  11   7    7
  31E |   7   6  12  14   6   6  20  17    4 |    8   8  14  15  13   7  21  16    9
------|--------------------------------------|--------------------------------------
 RMS  |  12   9  12 119  12   9  14  11      |T  13  17  18  17  17  14  19  15   14
 WRMS |   6   9  11 123   7   9  14  11      |NE 14  18  19  16  18  14  19  15   15

Table 3.0841.1   GPS week: 0841   Day: 1   MJD: 50132.0

               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  15  10   8   9   4  11   7    3 |    7  15  10  12   9   8  16   6    6
   2  |   6   6  11  12   8   6   8   8    3 |    4   8  12  15  14   6  11   8    5
   4  |   6  12  12   8   5   5  10   5    3 |    4  12  11  11  10   5   9   4    5
   5  |   4   9  10   6   5   4  11   7    2 |    5   9  11   9   7   5   8   5    4
   6E |   6  12  10  11   5   5  13   7    3 |   12  13  13  18  11   9  14   9    9
   7E |   9  17  11  18   7   5  14   8    4 |    6  11  11  21  11   5  21   7    6
   9  |  10   9   7  11   6   6   8   7    3 |   37  36  39  40  35  33  34  36   36
  12  |   4 --- --- ---  22 ---   9   7    4 |    7 --- --- ---  20 ---  12   9    8
  14  |   5   8  12  12   7   8  14   3    3 |    5   7  16  14  12   8  11   8    6
  15  |   4   9  10  10   6   7  13   6    3 |    5  11  13   9   9   9  10   6    5
  16  |   8   8  12  13  11   7  18   5    4 |    9  10   4   2  10   6  12   2    5
  17  |   6  10   9  14   6   4   7   6    3 |    5  14  12  12  11   7  13   6    6
  18  |   5  13   7  14   5   5  14   4    3 |    6  14  12  15  10   8  16   5    5
  19  |   7   7  13   6   3   4  12   5    3 |    4   8   7   7   7   8  14   6    5
  20  |   4   8  11   8   5   5  13   6    3 |    4  10  12  10   8   5   8   4    4
  21  |   4   7  12  11   8   6  14   8    3 |    5  10  14  13  12   5  15  10    5
  22  |   4  14  11   9   6   4  17   4    3 |    4  14  13   9  11   4  12   4    4
  23  |   7   5  11   9   3   6   9   4    3 |   21  25  31  28  27  23  21  24   23
  24  |   9   8  22  10   8   5   7   6    4 |    5   7  13  13  13   6   9   4    5
  25  |   7  10   8  10   4   3  16   8    3 |    4   9   9  10   8   5  12   9    4
  26  |   5  12   9  22   9   7  13   5    4 |    6  12  12  17  11  12  12   8    8
  27  |   3   6   6   5   4   4   9   6    2 |    4   7   8   6   8   8   9   7    5
  28E |   5  13   8  13   8   3  28  10    4 |    6  16  11  17  13   6  19   7    8
  29  |   5   9   9  12   5   5  12   5    3 |    5  11  11  11  11   7  13   8    6
  31E |   5  10   9  15   7   5  14   7    3 |    7   9  13  15  12   7  15   6    6
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  11  12   8   5  13   6      |T  10  13  15  15  13  10  14  10   10
 WRMS |   6  10  10  11   6   5  12   6      |NE 10  14  15  15  14  11  14  11   10

Table 3.0841.2   GPS week: 0841   Day: 2   MJD: 50133.0

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

Table 3.0841.3   GPS week: 0841   Day: 3   MJD: 50134.0

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

Table 3.0841.4   GPS week: 0841   Day: 4   MJD: 50135.0

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

Table 3.0841.5   GPS week: 0841   Day: 5   MJD: 50136.0

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

Table 3.0841.6   GPS week: 0841   Day: 6   MJD: 50137.0

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

Table 4: Precise Navigation Summary.

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

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

Table 4.0841   GPS week: 0841   MJD: 50131.0-50137.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2255 |U  57   35   90 |U  49   38  102 |   48   33   80 |
emr | emr 2325 |   45   28   69 |   36   33   77 |U  42   23   61 |
esa | esa 2056 |  140   71  201 |U  65   52  128 |   54   36   91 |
gfz | gfz 1138 |  148  104  283 |U 238  125  514 |  138   84  189 |
igp | igp 2285 |   49   29   68 |   38   33   79 |   42   23   61 |
igs | igs 2394 |   56   32   81 |   41   32   82 |   35   20   56 |
jpl | jpl 2235 |   45   28   68 |U  36   28   74 |   31   20   50 |

Table 5: Daily Precise Navigation Summary using the corresponding Centre orbit 
         positions and satellite clock corrections at 15 min intervals.

         Each line gives the daily station RMS w.r.t. the initial coordinates 
         for the Latitude, Longitude and Height components.
         
         CLK  - Satellite clocks used.
         EPO  - Number of satellite clock epochs available for that day.
         Units: centimetres.

Table 5.0841.0   GPS week: 0841   Day: 0   MJD: 50131.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2242 |   53   30   84 |   52   45  109 |   50   32  100 |
emr | emr 2176 |   42   27   73 |   45   51   86 |   49   30   87 |
esa | esa 1976 |  219   94  344 |   79   55  133 |   68   47  110 |
gfz | gfz 1152 |  148   93  227 |  252  148  602 |  120   78  151 |
igp | igp 2297 |   39   23   60 |   46   47   79 |   39   23   75 |
igs | igs 2395 |   49   23   88 |   50   41   86 |   31   24   76 |
jpl | jpl 2276 |   35   23   61 |   38   36   71 |   26   21   62 |

Table 5.0841.1   GPS week: 0841   Day: 1   MJD: 50132.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2225 |   66   30   83 |   51   35   99 |   55   33   87 |
emr | emr 2244 |   52   28   70 |   40   33   87 |   56   30   74 |
esa | esa 2042 |  109   53  151 |   57   49  119 |   55   33   95 |
gfz | gfz 1152 |  146   94  292 |  357  131  989 |  126   91  204 |
igp | igp 2302 |   50   26   66 |   39   30   80 |   53   25   67 |
igs | igs 2392 |   51   28   66 |   40   27   86 |   43   21   63 |
jpl | jpl 2273 |   47   26   65 |   36   26   79 |   37   18   56 |

Table 5.0841.2   GPS week: 0841   Day: 2   MJD: 50133.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2300 |   49   35   99 |   46   28   76 |   47   31   77 |
emr | emr 2378 |   39   33   67 |   25   16   45 |   40   21   59 |
esa | esa 2027 |  142   99  195 |   78   56  151 |   60   46   89 |
gfz | gfz 1104 |  127  106  254 |  144   82  332 |  142   82  193 |
igp | igp 2294 |   47   32   68 |   28   20   55 |   47   24   68 |
igs | igs 2400 |   49   40   73 |   33   16   54 |   36   19   52 |
jpl | jpl 2236 |   41   31   70 |   27   15   44 |   36   18   51 |

Table 5.0841.3   GPS week: 0841   Day: 3   MJD: 50134.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2297 |   59   38   89 |   49   40  109 |   53   30   78 |
emr | emr 2386 |   49   31   65 |   37   31   79 |   41   19   53 |
esa | esa 2026 |  101   57  123 |   49   44  117 |   44   39  105 |
gfz | gfz 1152 |  127   86  280 |  194   99  263 |  114   76  159 |
igp | igp 2287 |   52   34   72 |   39   31   78 |   35   20   54 |
igs | igs 2398 |   59   38   78 |   43   33   87 |   35   19   56 |
jpl | jpl 2284 |   50   33   67 |   35   28   75 |   34   17   49 |

Table 5.0841.4   GPS week: 0841   Day: 4   MJD: 50135.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2297 |   57   39  102 |   48   41  117 |   45   27   75 |
emr | emr 2395 |   45   24   80 |   34   30   87 |   32   18   45 |
esa | esa 2112 |  125   61  168 |   56   49  132 |   56   28   78 |
gfz | gfz 1152 |  150  102  329 |  242  111  335 |  157   97  177 |
igp | igp 2304 |   52   30   83 |   38   35   94 |   37   20   55 |
igs | igs 2400 |   62   32   94 |   35   28   92 |   32   16   49 |
jpl | jpl 2192 |   45   27   79 |   36   27   89 |   25   17   47 |

Table 5.0841.5   GPS week: 0841   Day: 5   MJD: 50136.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2142 |   53   37   82 |   56   42  102 |   43   44   78 |
emr | emr 2295 |   43   28   56 |   36   30   69 |   38   20   51 |
esa | esa 2109 |  109   40   96 |   53   40   84 |   47   27   74 |
gfz | gfz 1104 |  138   91  208 |  144   89  217 |  122   63  183 |
igp | igp 2206 |   47   32   56 |   40   32   81 |   42   21   56 |
igs | igs 2377 |   56   28   60 |   38   30   72 |   33   21   47 |
jpl | jpl 2191 |   46   31   57 |   34   26   66 |   28   16   42 |

Table 5.0841.6   GPS week: 0841   Day: 6   MJD: 50137.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2282 |   59   34   90 |   42   35   97 |   41   28   62 |
emr | emr 2398 |   46   23   71 |   34   28   80 |   33   21   42 |
esa | esa 2097 |  139   69  225 |   75   68  149 |   40   24   78 |
gfz | gfz 1152 |  188  147  357 |  262  183  412 |  176   96  239 |
igp | igp 2303 |   53   26   70 |   34   30   82 |   37   24   51 |
igs | igs 2399 |   64   28  101 |   44   39   92 |   31   20   45 |
jpl | jpl 2192 |   49   27   74 |   45   31   85 |   30   28   35 |

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