Subject: [IGSREPORT-2701] Wk 0854 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Wed, 5 Jun 1996 6:57:19 PDT

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IGS Electronic Report    Wed Jun  5  6:57:19 PDT 1996      Message Number 2701
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0854 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0854   (May 19, 1996 - May 25, 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 (IGS08547.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:

 IGS08540-6.SP3  IGS GPS ephemeris files for days 0-6, week 0854 in SP3 format.
 IGS08547.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08547.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:
   PRN15 and PRN28. 

5. PRN20 was set unusable from day 5/wk852 (May 10) starting at 15:18 
   until day 1/wk854 (May 20) at 7:36 (ref. NANU 094-96141).
   Also, PRN20 was set unusable from day 2/wk854 (May 21) starting at 22:42
   until futher notice (ref. NANU 095-96142). These explain higher RMS values
   for PRN20 on days 0-1 and the missing solutions for days 3-6.

6. There was a maneuver of PRN25 on day 5 (May 24) (ref. NANU 096-96145).
   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 PRN25 were excluded from the long arc evaluation and the point
   positioning evaluation on day 5 due to unrealistic RMS caused by the
   maneuver.

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
         ------------+----------+-------+------------------------------
          3 (May 22) | 00:00:00 |  19   |   ALL    | Modelling problem (a)
          4 (May 23) | 00:00:00 |  14   |   ALL    | Modelling problem
          6 (May 25) | 00:00:00 |  25   |   ALL    | Maneuver 

  (a) PRN19 was excluded from the long arc evaluation on day 2 (May 21)
      because of severe long arc modeling problems;

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

9. SIO solutions were not used in the combination due to late submission to
   CDDIS. These will be used in the Final combination.

10.The IGP sp3 file on day 0 (igp08540.sp3) included positions for satellite
   PRN50 which is obviously wrong.  Users must disregard this "virtual" GPS
   satellite.  We are sorry for any inconvenience this might have caused.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08547.SUM).

Table 1: Week 0854 summary.                       (May 19, 1996 - May 25, 1996)

Table 1.0854.a   GPS week: 0854   MJD: 50222.0-50228.0

         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  69 | .00  .01  .01  -.08   .02  -.24   .1  .09  .06 |   -5.1    -.2    1.5
        | .01  .00  .01   .09   .06   .11   .1           |    6.8   12.2
emr  29 | .00 -.01 -.02   .66  -.02   .32   .2  .12  .12 |   93.8   27.0     .7
        | .00  .01  .01   .09   .07   .30   .2           |   57.8    8.9
esa  52 | .00  .00 -.01  -.11  -.07  -.14   .0  .10  .09 |     .0    6.4    2.1
        | .01  .01  .01   .11   .07   .16   .1           |   20.0   21.7
gfz  49 | .00 -.01 -.01   .03   .07  -.12  -.3  .07  .07 |   95.3   27.1     .6
        | .00  .00  .00   .06   .06   .14   .0           |   57.6    9.0
igp  n/a| .00  .00  .00   .13  -.02   .21  -.1  .07  .05 |     .4   -1.3     .7
        | .00  .01  .01   .09   .08   .16   .1           |    1.6    2.0
jpl  37 | .00  .02  .00  -.02   .07   .31   .2  .10  .10 |   94.7   27.6     .7
        | .00  .00  .01   .12   .11   .14   .1           |   57.7    8.9
ngs  48 |-.01 -.05 -.01  -.25  -.22  -.16  -.1  .14  .14 |   -1.7     .5   77.8
        | .01  .01  .01   .21   .23   .40   .2           |    5.0    7.8

Table 1.0854.b   GPS week : 0854   MJD: 50222.0-50228.0

         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   2   3   3   3 |
   2  |   4   3   5   3   3   3   3 |
   3  |   3   4   4   4   4   4   4 |
   4E |   5   3   4   4   4   5   5 |
   5  |   4   4   3   3   4   4   3 |
   6  |   3   4   3   3   3   3   3 |
   7  |   4   3   4   4   4   3   3 |
   9  |   4   4   5   3   4   4   4 |
  14  |   4   3   3   4   9   4   3 |
  15E |   6   4   4   5   5   4   4 |
  16  |   4   3   3   4   3   3   3 |
  17E |   7   7   7   6   5   6   5 |
  18  |   4   3   5   3   3   4   3 |
  19  |  38  59  48   4   3   3   3 | Modeling problems on days 0-2.
  20  |  16  18   4 --- --- --- --- | See Remark 5. No tracking on days 3-6.
  21  |   4   3   4   3   4   3   4 |
  22  |   3   3   3   3   3   3   3 |
  23  |   4   4   5   4   4   5   4 |
  24E |   5   4   5   5   4   5   5 |
  25  |   3   3   3   3   5   0   5 | Maneuver on day 5.
  26  |   4   3   4   3   3   3   3 |
  27  |   6   5   6   4   3   3   3 |
  28  |   3   3   3   4   3   3   3 |
  29  |   3   2   3   2   4   4   3 |
  31  |   4   4   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 2.0854.0   GPS week: 0854   Day: 0   MJD: 50222.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  71 | .00  .01  .00   .08   .00  -.20   .0  .11  .08 |  -15.7   14.2    1.5
emr  31 | .00 -.01 -.03   .60   .05  -.11   .5  .13  .14 |    9.9   35.6     .7
esa  54 | .00  .00  .00   .01   .00   .07   .0  .09  .08 |  -17.8    5.0    2.0
gfz  50 | .00 -.01  .00   .04  -.02  -.18  -.3  .06  .06 |   11.9   34.7     .7
igp  n/a| .00  .00 -.01   .04  -.02   .14  -.1  .08  .05 |   -1.0    1.6     .9
jpl  37 |-.01  .02  .01  -.23  -.01   .25   .2  .12  .13 |   10.8   36.3     .7
ngs  47 |-.02 -.04  .01  -.47   .08   .50   .0  .17  .16 |   -2.9    3.6   78.2

Table 2.0854.1   GPS week: 0854   Day: 1   MJD: 50223.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  70 | .00  .02  .02   .00   .11  -.33   .1  .13  .07 |   -3.3    -.5    1.5
emr  29 | .00 -.01 -.02   .61   .06   .25   .2  .11  .10 |   44.7   31.8     .5
esa  53 | .00  .01 -.01  -.16  -.19  -.18   .1  .08  .08 |   24.2   -6.6    2.1
gfz  48 | .00 -.01 -.01   .04   .02  -.11  -.3  .07  .06 |   46.0   32.2     .4
igp  n/a| .00  .01  .00   .07   .09   .05  -.1  .08  .05 |     .0    -.8     .5
jpl  37 | .00  .02  .01   .06   .24   .48   .3  .15  .15 |   45.6   32.4     .6
ngs  48 | .00 -.05  .00  -.49  -.54   .18  -.1  .15  .15 |   -3.8    7.2   76.4

Table 2.0854.2   GPS week: 0854   Day: 2   MJD: 50224.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 | .00  .01  .01  -.08  -.02  -.37   .2  .11  .06 |   -6.0    1.2    1.5
emr  27 | .00 -.02 -.02   .72  -.09   .15   .3  .15  .15 |   75.1   13.6     .8
esa  51 | .00  .00  .01  -.22  -.02  -.11  -.1  .09  .08 |   21.4   10.2    2.1
gfz  49 | .01 -.01 -.01  -.09   .06   .06  -.3  .09  .08 |   76.6   13.1     .7
igp  n/a| .01  .00  .01   .10   .09   .52   .0  .10  .06 |    2.3   -3.6     .8
jpl  37 | .00  .02  .01   .06   .21   .55   .1  .12  .13 |   76.0   14.1     .8
ngs  48 |-.01 -.04 -.02  -.03  -.51  -.58  -.3  .16  .15 |   -5.4    4.2   77.8

Table 2.0854.3   GPS week: 0854   Day: 3   MJD: 50225.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .02  .01  -.12   .07  -.18   .1  .06  .06 |  -11.5   11.2    1.5
emr  29 |-.01  .00 -.01   .59  -.12   .57   .0  .12  .12 |   88.0   25.0     .8
esa  52 |-.01  .00 -.01   .05  -.02  -.41   .1  .12  .09 |  -21.6   46.5    2.8
gfz  49 | .00 -.02  .00  -.01   .14  -.10  -.4  .07  .07 |   89.7   24.7     .7
igp  n/a| .01 -.01  .01   .21  -.12   .26  -.1  .06  .05 |   -1.7    -.1     .8
jpl  37 | .00  .03  .01   .02  -.03   .14   .1  .06  .06 |   89.3   24.8     .8
ngs  49 | .01 -.06 -.02   .02  -.26  -.01  -.4  .13  .12 |   -7.2    7.7   79.1

Table 2.0854.4   GPS week: 0854   Day: 4   MJD: 50226.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .01  .02  .01  -.16  -.03  -.20   .0  .07  .06 |   -4.2    5.0    1.6
emr  28 | .00 -.02 -.02   .71  -.05   .23   .2  .12  .13 |  113.1   33.4     .7
esa  52 | .00  .00 -.01  -.08  -.06   .04   .0  .10  .09 |  -21.3    7.0    1.5
gfz  49 | .00 -.01  .00   .09   .15   .03  -.3  .06  .07 |  114.4   33.9     .6
igp  n/a| .00 -.01 -.02   .26  -.02   .16   .1  .09  .06 |    -.6    -.2     .7
jpl  37 |-.01  .02  .00  -.12   .04   .24   .2  .08  .08 |  114.1   33.9     .6
ngs  48 |-.01 -.05 -.01  -.11  -.08  -.38   .1  .13  .13 |     .0    -.8   77.5

Table 2.0854.5   GPS week: 0854   Day: 5   MJD: 50227.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .02  .02  .01  -.11   .06  -.34   .1  .06  .06 |    3.2  -14.9    1.5
emr  30 | .00 -.01  .00   .81  -.03   .84   .0  .12  .12 |  151.4   16.4     .7
esa  51 | .00  .01 -.01  -.11  -.13  -.15   .0  .11  .10 |    5.0  -25.7    2.3
gfz  50 | .00 -.02 -.01   .04   .04  -.29  -.3  .08  .07 |  152.8   16.7     .6
igp  n/a| .00  .00  .00   .07  -.07   .18  -.1  .05  .05 |    2.4   -3.3     .7
jpl  37 | .00  .02  .00  -.02   .10   .25   .2  .06  .06 |  152.2   17.4     .7
ngs  48 |-.01 -.04 -.01  -.34  -.13  -.27  -.4  .11  .11 |    8.2  -14.5   77.5

Table 2.0854.6   GPS week: 0854   Day: 6   MJD: 50228.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .02  -.17  -.02  -.05   .2  .05  .05 |    1.7  -17.7    1.6
emr  31 |-.01 -.02 -.01   .58   .01   .33   .1  .10  .10 |  174.5   33.2     .6
esa  49 | .00  .00 -.02  -.26  -.05  -.23   .0  .13  .10 |    9.8    8.3    1.9
gfz  47 | .00 -.01 -.01   .07   .06  -.27  -.4  .07  .07 |  175.7   34.1     .5
igp  n/a|-.01  .00 -.01   .18  -.09   .11  -.1  .05  .05 |    1.1   -3.0     .7
jpl  37 |-.01  .02  .00   .10  -.02   .27   .3  .06  .06 |  175.3   34.3     .6
ngs  48 |-.01 -.05 -.02  -.36  -.08  -.58  -.1  .12  .12 |    -.8   -3.6   78.2

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 3.0854.0   GPS week: 0854   Day: 0   MJD: 50222.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs  IGS |  cod emr esa gfz igp jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   4   7   8   6   6   8   9    3 |    5  10   8   7   7   6  10    5
   2  |   5  13   6   6   9  11  20    4 |   12  13  11  12  18  13  21   11
   3  |   8   9   7   4   5   6  16    3 |    9  10   9  12   7   8  19    8
   4E |   7  24   7   6   6   8  13    5 |   10  16  13  15  11  12  20   11
   5  |   6  12  10   5   4   7  10    4 |    5  12   9   8   8   5  13    7
   6  |   6   9   7   4   4   4  14    3 |    3   9   7   7   6   5  12    5
   7  |   8  14   8   6   3   7  18    4 |    4  10   8  10   8   8  15    6
   9  |   8   7  11   6   3   9  22    4 |    4  10  12   8   8   5  22    6
  14  |   6  13  13   4   4   7  12    4 |    3   7   8   8   7   5  12    4
  15E |   9  11  13   8  11  10  32    6 |    6  13   9  10   9   9  21    7
  16  |   5  11   8   5   6   9  22    4 |   11   9  12   7   9  10  23    8
  17E |  16  14  14  14   3   9  23    7 |   14  17  11  15  10   7  20    8
  18  |   9  16   7   5   5   8  14    4 |   11  16  10   8   9  10  17    8
  19  |  36 --- --- ---  28  41 ---   38 |   26 --- --- ---   5  46 ---   25
  20  |  15 --- --- ---  11  17 ---   16 |   15 --- --- ---  12  20 ---   16
  21  |   9   9   7   6   6  10  13    4 |    4   8   7  10   7   8  12    6
  22  |   6   7   6   5   5   6   9    3 |    4  12   6   9   6   4  15    6
  23  |   7   8   7   6   4   9  21    4 |   13  15  15  15  14  14  21   13
  24E |   9  21   8   8   8  12  14    5 |   14  16  14  14  16  11  25   13
  25  |   6   6   8   6   3   8  13    3 |    7   8   6   9   8   6  16    6
  26  |   8   8  12   5   8   6  12    4 |    5   9  13  10  10   7  12    7
  27  |   8  28  14   7   6  13  21    6 |    6  20   8   7   9   7  24    6
  28  |   8  10   6   6   5   6  14    3 |    5  10   6   8   7   4  14    5
  29  |   5   8   6   6   4   8  12    3 |   13  11  13  16  14  13  18   12
  31  |   7  15  12   4   4   6  12    4 |    8   8   9   9   5   6  14    6
------|----------------------------------|----------------------------------
 RMS  |  11  13   9   6   8  12  17      |T  10  12  10  10   9  12  17    9
 WRMS |   8  14   8   6   5  13  16      |NE  9  11   9   9   9  13  16    9

Table 3.0854.1   GPS week: 0854   Day: 1   MJD: 50223.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs  IGS |  cod emr esa gfz igp jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   4   5  10   9   5   6   6    3 |    4   7   9   8   5   8   7    5
   2  |   6   9   7   9   4   6   9    3 |   11  17  10  14  11   9  15   12
   3  |   9  10   5   8   7   8  19    4 |    6  10   9   8   6   9  19    6
   4E |   7   8   7   7   6   6  12    3 |    8  14  13  14  10   9  20   10
   5  |   7   9  10   6   3   5  10    4 |    5  14  11   9   7   6  17    7
   6  |   7   9   8   6   4   5  25    4 |    5   8   9   7   8   6  29    7
   7  |   6   8   7   5   4   4   9    3 |    4   8   9   8   6   5  10    6
   9  |   7   7  10   7   4   6  14    4 |    5  10  12   9   8   6  14    7
  14  |   4  10   8   5   4   5   7    3 |    3  10   6  10   5   6   8    5
  15E |   6  13  11   7   7   6  14    4 |    6   9  13  13  10   9  24    9
  16  |   7   9   8   5   7   7  10    3 |    6   6   6   5   5   6  13    4
  17E |  16  19  11  15   6   9  28    7 |   13  17  10  15   9   7  16    7
  18  |   7  11   6   5   4   7  11    3 |   10  13  10  11  11   9  19   10
  19  |  55 --- --- --- ---  63 ---   59 |   28 --- --- --- ---  96 ---   42
  20  |  17 --- --- ---  30  20 ---   18 |   10 --- --- ---  27  41 ---   22
  21  |   7   8   6   8   3   8   9    3 |    4   7   8  10   6  10  13    6
  22  |   5   9   7   4   5   9  14    3 |    4  12   7   6   7   6  16    5
  23  |   7  10   6   6   3   9  20    4 |    8   9  11   8  10  11  14    8
  24E |   8  17   7   5   4   6  14    4 |   11  15  13  16  16  12  26   13
  25  |   4   7   6   6   5   7   8    3 |    4   8   6  10   7   5  12    5
  26  |   7   6   7   5  11   7  10    3 |    5  10   7   9  12   6  11    5
  27  |   5  19  11   9   7   9  18    5 |    7  11   9   7  10   8  23    6
  28  |   8   9   5   6   7   5  15    3 |    3  12   7   8  11   7  14    6
  29  |   4   8   5   5   3   6   8    2 |   14  14  16  17  16  14  22   15
  31  |   5  11  11   6   4   8  18    4 |    5   9  10   9   6   7  18    6
------|----------------------------------|----------------------------------
 RMS  |  13  11   8   7   8  15  15      |T   9  11   9  10  10  22  17   12
 WRMS |   7  10   8   6   5  15  15      |NE  9  10   9   9  10  23  16   12

Table 3.0854.2   GPS week: 0854   Day: 2   MJD: 50224.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs  IGS |  cod emr esa gfz igp jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   4   7   7   7   4   6  11    3 |    5   6   8   8   6   7  10    4
   2  |   5  24   6   7   5   6  15    5 |   11  32  10  13  15  11  18   12
   3  |   7  12   8   6   5   7  21    4 |    5  11   8   9   8   6  16    5
   4E |   8  17   7   9   5   9  13    4 |   10  19  14  19  12   8  24   12
   5  |   7   8   9   6   3   5  11    3 |    8  10  11  15   7   6  17    8
   6  |   5   9   6   5   6   4  14    3 |    4   8   7  10   8   4  14    4
   7  |   5  11  12   5   4   7  11    4 |    6   7   7  10   5   5  11    5
   9  |   8   9  12  12   4   6  21    5 |    6  11  14  13   7   5  25    7
  14  |   4  13   7   5   4   5  12    3 |    4  13   9  10   5   6  15    5
  15E |   8  10  11   7   6   8  19    4 |    7  14  13  13  12   8  21    8
  16  |   4  11   8   6   7   7  14    3 |    5   9   9   7   8   5  14    5
  17E |  13  19  13  19   6   9  24    7 |   13  13  10  14   8   6  16    7
  18  |   6  19   9   8   5   7  23    5 |   10  30  15  13  13  12  18   12
  19  |  44 --- --- ---  41  51 ---   48 |    0 --- --- ---   0   0 ---  ---
  20  |   3 --- --- ---   7   4 ---    4 |    2 --- --- ---   2   3 ---    2
  21  |   7  10   5  11   5  10   9    4 |    5   9   9   9   8   8   8    5
  22  |   5  11   6   5   4   6  10    3 |    4  11   6  11   7   5  12    4
  23  |   6   8  13  12   4   7  18    5 |   10  13  13  13  11  12  16   10
  24E |   9  22   9   7   5   8  15    5 |    9  16  15  17  15   9  26   12
  25  |   3   7   7   6   4   7  11    3 |    6   9   9  10   7   5  13    6
  26  |   6  22   7   8   4   6  10    4 |    4  24  11  11   8   6  10    6
  27  |   5  30   7   7  10  12  21    6 |    5  24   8   7  10   6  25    6
  28  |   5  11   6   8   4   6  13    3 |    4  12   7  10   7   5  12    5
  29  |   4  10   5   6   2   6  14    3 |   11  19  13  15  14  11  23   13
  31  |   6  16  12   9   7   6  11    4 |    8  12  11  14   6   5  13    6
------|----------------------------------|----------------------------------
 RMS  |  11  15   9   9  10  12  16      |T   7  16  10  12   9   7  17    7
 WRMS |   6  15   8   8   6  13  15      |NE  6  16  10  11   8   6  15    7

Table 3.0854.3   GPS week: 0854   Day: 3   MJD: 50225.0

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

Table 3.0854.4   GPS week: 0854   Day: 4   MJD: 50226.0

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

Table 3.0854.5   GPS week: 0854   Day: 5   MJD: 50227.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs  IGS |  cod emr esa gfz igp jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   6   9   9   8   3   6  10    3 |    5  11   9   9   5   8  10    5
   2  |   7   8   8   8   4   6  10    3 |    7  12  10  10   7   7  13    8
   3  |   7  11   8   5   3   7  12    4 |    6  11  11   8   6   8  13    6
   4E |  10  16  14   9   6   8  11    5 |   10  14  16  12  11  10  18   11
   5  |   5   8  12   8   4   5  16    4 |    7  10  13   9   9   7  18    8
   6  |   5   5  12   3   7   4  12    3 |    5   9   8   7   9   5  12    5
   7  |   4   7  10   7   3   5   6    3 |    4   7   9  10   6   4   9    5
   9  |   4   8  14   8   5   7  12    4 |    5  10  15   8   8   4  16    6
  14  |   8  19  12   3   4   5  10    4 |    6  12   7   9  15   7  12    6
  15E |   6   9  13  10   5   7  13    4 |    8  13  17  12  12   8  19   10
  16  |   6   7  11   5   6   5   8    3 |    6   9   8   8   7   7  12    6
  17E |   9  17  16  20   5   7  10    6 |   12  12  17  13   9   5  15    8
  18  |   5  19   7   5   6   3   7    4 |    7  17  11  11  12   6  12    7
  19  |   4  14   7   7   5   6  10    3 |    3  13   7  11   8   4  11    5
  21  |   6   8   8   6   3   6  12    3 |    5   8  11   7   7   8  12    6
  22  |   5   9   6   4   5   6  11    3 |    5  14   8   8   9   5  15    5
  23  |   8   5  13  11   4   7  17    5 |    8   8  10  12  10  10  15    8
  24E |  11  20  13  10   7   7  12    5 |   11  16  19  14  14   9  25   12
  25  | --- ---   2 --- --- --- ---    0 |  --- ---   0 --- --- --- ---  ---
  26  |   5   6  11   3   9   4   9    3 |    4  11  10   9  10   5  12    6
  27  |   3  15   8   5   3   5   9    3 |    5  12   7   7   6   5  13    5
  28  |   7   9   8   6   4   6  12    3 |    4  11   8  12   8   8  14    7
  29  |   5  13   7   5   6   5  18    4 |   30  29  34  33  32  29  36   31
  31  |   5   9  11   5   4   5   9    3 |    4  10   9   8   7   4  11    5
------|----------------------------------|----------------------------------
 RMS  |   6  12  11   8   5   6  11      |T   9  12  13  11  11   9  15    9
 WRMS |   6  12  10   7   5   6  11      |NE  8  12  11  11  11   9  15    9

Table 3.0854.6   GPS week: 0854   Day: 6   MJD: 50228.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs  IGS |  cod emr esa gfz igp jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   4   8   9   5   4   4   9    3 |    6  10  11   8   7   8  12    7
   2  |   4   6   9   6   6   5   9    3 |    8  11  10  11  10   8  13    8
   3  |   7  10   6   4   4   8  16    4 |    9  11  10  10   9  10  17    8
   4E |   8  13  17  10   9   8  15    5 |   10  16  16  14  11   9  22   11
   5  |   5   6  14   5   4   4  12    3 |    8  11  15  11   9   8  17    9
   6  |   5   5  13   5   4   4   9    3 |    5   8  10   8   8   5  12    6
   7  |   4   9   9   7   6   4  11    3 |    4   7  12   8   9   6  10    6
   9  |   5   9  18   6   3   5  13    4 |    5  12  16   8  10   7  16    8
  14  |   5   6  13   5   3   5  11    3 |    5  12   9  10   9   6  13    6
  15E |   5  11  20   8   9   6  12    4 |    8  12  19  14  16  10  22   11
  16  |   5   7  10   5   5   5  11    3 |    5   7   9   6   6   6  12    6
  17E |   7  16  14  15   8   8  18    5 |   12  15  14  14  10   9  20   10
  18  |   5  11   8   6   4   4   9    3 |   17  15  13  17  17  15  19   15
  19  |   3  16   9   4   4   7   8    3 |    5  13   8  11   8   5  15    6
  21  |   6   9  10   9   4   7  11    4 |    5   9  10   8   7   7  11    6
  22  |   5   8   7   5   4   5  11    3 |    5  12  10  11   9   6  16    7
  23  |   5  11  13   5   4   6  18    4 |   12  11  14  12  13  14  17   12
  24E |  10  19  12  10   8   7  12    5 |    9  16  11  15  11  10  23   10
  25  |   6   9  21   5   6 --- ---    5 |   30  32  32  31  33 --- ---   31
  26  |   4   8  16   8   5   3   8    3 |    5  11  14  12   9   8  14    8
  27  |   3  13  10   5   4   5   9    3 |    7   8   8   7   9   7  15    7
  28  |   4  10   7   7   4   5  11    3 |    3  11   9   8   8   7  13    5
  29  |   4   5   7   6   3   5  19    3 |   17  16  19  19  18  17  30   18
  31  |   4   8  13   5   4   6   9    3 |    4   8  10  10   7   8  12    5
------|----------------------------------|----------------------------------
 RMS  |   5  10  13   7   5   6  12      |T  10  13  13  12  12   9  16   10
 WRMS |   5  10  10   7   5   6  12      |NE 10  12  13  12  12   8  15   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 4.0854   GPS week: 0854   MJD: 50222.0-50228.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2327 |U  46   36   85 |U  54   39  104 |   42   27   69 |
emr | emr 2239 |   38   29   71 |   38   31   87 |U  29   14   43 |
esa | esa 1971 |   97   61  144 |U  84   61  187 |   87   38  128 |
gfz | gfz 1125 |   34   26   70 |U  35   29   76 |   26   13   39 |
igp | igp 2292 |   38   29   70 |   37   32   79 |   30   17   45 |
igs | igs 2343 |   39   29   75 |   39   32   81 |   33   17   46 |
jpl | jpl 2301 |   35   27   69 |U  35   31   77 |   26   14   39 |

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 5.0854.0   GPS week: 0854   Day: 0   MJD: 50222.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2392 |   45   38   83 |   56   50  133 |   43   27   74 |
emr | emr 2193 |   42   32   74 |   49   46  129 |   31   15   49 |
esa | esa 1916 |   91   68  160 |   84   78  199 |  101   39  161 |
gfz | gfz 1104 |   32   23   55 |   42   21   73 |   26   12   44 |
igp | igp 2394 |   39   31   73 |   42   42   98 |   33   19   48 |
igs | igs 2400 |   43   31   80 |   43   43   94 |   37   18   51 |
jpl | jpl 2384 |   38   31   74 |   42   43   99 |   26   17   43 |

Table 5.0854.1   GPS week: 0854   Day: 1   MJD: 50223.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2395 |   42   34   93 |   54   34  110 |   43   23   68 |
emr | emr 2202 |   35   28   71 |   34   28  104 |   30   12   47 |
esa | esa 1889 |  108   59  139 |   74   52  224 |   74   36  132 |
gfz | gfz 1104 |   30   28   65 |   19   31   96 |   21   12   38 |
igp | igp 2202 |   33   28   69 |   32   28   97 |   33   16   50 |
igs | igs 2400 |   38   27   74 |   34   27   89 |   32   15   49 |
jpl | jpl 2383 |   35   28   76 |   30   27   94 |   27   13   45 |

Table 5.0854.2   GPS week: 0854   Day: 2   MJD: 50224.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2389 |   40   32   80 |   49   40  104 |   37   31   74 |
emr | emr 2196 |   31   24   62 |   26   28   80 |   27   12   41 |
esa | esa 1909 |  111   46  151 |  130   49  198 |  101   48  145 |
gfz | gfz 1104 |   20   21   56 |   25   28   89 |   19   14   35 |
igp | igp 2373 |   33   24   57 |   23   28   79 |   23   16   40 |
igs | igs 2395 |   37   20   69 |   37   27   85 |   33   21   52 |
jpl | jpl 2379 |   31   22   57 |   24   28   78 |   22   15   39 |

Table 5.0854.3   GPS week: 0854   Day: 3   MJD: 50225.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2303 |   39   33   74 |   43   35   90 |   49   28   71 |
emr | emr 2292 |   39   31   69 |   33   22   67 |   28   17   45 |
esa | esa 1926 |   56   38  109 |   54   48  125 |  108   35  129 |
gfz | gfz 1152 |   39   28   78 |   37   16   72 |   22   11   33 |
igp | igp 2303 |   39   32   69 |   34   26   69 |   28   19   45 |
igs | igs 2304 |   36   27   68 |   33   24   69 |   35   15   47 |
jpl | jpl 2288 |   35   25   66 |   30   21   68 |   24   12   37 |

Table 5.0854.4   GPS week: 0854   Day: 4   MJD: 50226.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2302 |   44   36   89 |   51   36   84 |   36   25   59 |
emr | emr 2294 |   33   24   70 |   34   23   56 |   27   15   38 |
esa | esa 1991 |   94   76  159 |   71   39  171 |   62   23  104 |
gfz | gfz 1152 |   36   26   83 |   21   23   56 |   27   13   40 |
igp | igp 2260 |   36   25   73 |   37   25   57 |   28   18   41 |
igs | igs 2303 |   36   31   77 |   36   26   72 |   31   15   42 |
jpl | jpl 2287 |   33   24   67 |   31   24   56 |   24   13   35 |

Table 5.0854.5   GPS week: 0854   Day: 5   MJD: 50227.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2206 |   53   36   85 |   59   39  100 |   45   28   72 |
emr | emr 2198 |   38   30   77 |   45   28   76 |   33   14   45 |
esa | esa 2077 |  121   82  148 |   67   69  208 |   71   37   95 |
gfz | gfz 1104 |   32   28   77 |   49   32   68 |   35   15   45 |
igp | igp 2208 |   39   31   72 |   40   31   73 |   33   18   50 |
igs | igs 2293 |   41   34   82 |   41   32   80 |   35   18   42 |
jpl | jpl 2192 |   34   30   69 |   40   28   66 |   31   14   40 |

Table 5.0854.6   GPS week: 0854   Day: 6   MJD: 50228.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2299 |   54   40   88 |   60   39  100 |   39   25   63 |
emr | emr 2300 |   43   32   72 |   43   36   71 |   27   14   34 |
esa | esa 2087 |   79   42  136 |   85   79  170 |   79   40  118 |
gfz | gfz 1152 |   42   28   71 |   40   45   69 |   28   14   37 |
igp | igp 2303 |   45   34   74 |   46   38   70 |   28   15   38 |
igs | igs 2304 |   39   28   76 |   47   39   77 |   28   13   36 |
jpl | jpl 2192 |   40   31   69 |   44   39   70 |   26   12   34 |

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