Subject: [IGSREPORT-2593] Wk 0848 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 23 Apr 1996 6:00:07 PDT

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IGS Electronic Report    Tue Apr 23  6:00:07 PDT 1996      Message Number 2593
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0848 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0848   (Apr 07, 1996 - Apr 13, 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 (IGS08487.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:

 IGS08480-6.SP3  IGS GPS ephemeris files for days 0-6, week 0848 in SP3 format.
 IGS08487.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08487.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.  Higher clock RMS for NGS on day 4 (Apr 11) was caused by
   a clock jump on PRN24.

5. A new GPS satellite, PRN03, was launched on Mar 28 at 00:21 (wk846/day 4). 
   According to NANU 068-96100, PRN03 was usable on Apr 9/96 starting at 21:17 
   (wk848/day 2). However, PRN03 is to be used with caution because of modeling
   problems.

6. PRN16 was set unhealthy from day 5/wk848 @ 20:40 (Apr 12) until day 1/wk849 
   @ 20:19 (Apr 15). Consequently, PRN16 is to be used with caution during this
   period (ref. NANU 072-96103).
   
7. There was a maneuver of PRN01 on day 5 (Apr 12) (ref. NANU 069-96103).
   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 PRN01 were excluded from the long arc evaluation on
   day 5 due to unrealistic RMS caused by the maneuver.

8. High orbit RMS for IGP was caused by a maneuver on PRN01. Only one Centre 
   (ESA) submitted a solution at the time of the IGP combination. IGS users 
   were notified to use this satellite with caution (See file igp08485.sum).

9. 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
         ------------+----------+-----+-------------------------------------
          4 (Apr 11) | 00:00:00 | 03  |   ALL    | Modeling problems
          6 (Apr 13) | 00:00:00 | 01  |   ALL    | Maneuver
          6 (Apr 13) | 00:00:00 | 16  |   ALL    | Modeling problems

10.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 (IGS08487.SUM).

Table 1: Week 0848 summary.                       (Apr 07, 1996 - Apr 13, 1996)

Table 1.0848.a   GPS week: 0848   MJD: 50180.0-50186.0

         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 | .01  .01  .00  -.46   .18  -.10   .0  .06  .05 |    -.8   -5.1    1.5
        | .00  .00  .00   .17   .08   .25   .1           |    7.2   12.7
emr  28 | .01 -.01  .00   .81  -.28   .40   .0  .12  .10 | 1833.4   23.0     .7
        | .00  .01  .01   .13   .12   .34   .1           |   55.6    8.2
esa  51 | .00  .01  .00  -.14   .01  -.17   .0  .09  .08 |    2.1    2.3    6.0
        | .00  .01  .00   .17   .19   .13   .1           |   19.7   23.4
gfz  45 |-.03 -.05 -.01   .21   .14  -.24  -.2  .11  .11 | 1834.6   23.4     .6
        | .00  .00  .01   .08   .14   .25   .1           |   55.4    8.4
igp  n/a| .01  .00  .00   .11   .04   .29   .0  464  .07 |    -.5    -.6    1.1
        | .00  .00  .01   .09   .18   .11   .1           |    1.6    3.2
jpl  37 | .00  .01  .00  -.14   .06   .08   .1  .07  .07 | 1834.1   23.7     .6
        | .01  .01  .00   .20   .27   .16   .1           |   55.7    8.1
ngs  44 | .01 -.06  .04  -.12   .25  -.36  -.3  .16  .15 |   67.4 -118.2 2270.8
        | .01  .01  .02   .28   .21   .23   .2           |  182.3  316.2
sio  110| .00  .01  .00   .18  -.24   .05   .0  .08  .08 |     .0     .0     .0
        | .00  .00  .00   .10   .09   .44   .0           |     .0     .0

Table 1.0848.b   GPS week : 0848   MJD: 50180.0-50186.0

         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   4   3   3   4   0   4 | Maneuver on day 5.
   2  |   3   3   3   3   3   4   4 |
   3  | ---   0  57  35  10  17  16 | New satellite. Set usable on day 2.
   4  |   3   3   3   3   3   4   3 |
   5  |   2   3   3   3   3   3   3 |
   6  |   4   3   3   4   4   4   5 |
   7  |   3   3   3   3   3   3   4 |
   9  |   3   3   4   3   3   3   3 |
  14  |   3   3   3   3   3   3   3 |
  15  |   3   3   3   3   4   3   4 |
  16  |   4   4   4   3   3   6   0 | Unhealthy on days 5-6. See Remark #6.
  17  |   3   3   4   4   4   4   4 |
  18  |   4   4   3   3   3   3   3 |
  19  |   3   3   3   3   4   4   4 |
  20  |   3   3   3   3   3   3   3 |
  21  |   3   3   3   3   3   3   3 |
  22  |   3   3   4   3   3   3   3 |
  23  |   4   3   3   3   4   4   4 |
  24  |   3   3   3   3   3   4   5 |
  25  |   4   3   3   3   3   4   3 |
  26  |   4   4   4   3   4   4   4 |
  27  |   3   3   3   3   3   4   5 |
  28  |   3   3   3   3   4   4   4 |
  29  |   3   3   3   3   3   4   3 |
  31  |   3   4   3   4   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 2.0848.0   GPS week: 0848   Day: 0   MJD: 50180.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .01  .00  -.27   .26   .12   .0  .04  .04 |   -7.1   15.4    1.4
emr  28 | .01  .00  .00   .69  -.23   .41   .0  .10  .10 | 1761.8   31.2     .7
esa  51 | .00  .00 -.01   .10  -.34  -.12   .0  .07  .07 |    2.9   13.7    5.6
gfz  45 |-.03 -.05 -.01   .29  -.06  -.58  -.2  .11  .11 | 1763.5   31.7     .7
igp  n/a| .02  .00 -.01   .22  -.02   .28   .1  .07  .06 |   -2.6    4.6     .7
jpl  37 | .01  .01  .00  -.12   .14   .01  -.1  .06  .06 | 1762.2   31.5     .6
ngs  45 |-.01 -.06  .01  -.13   .32  -.39  -.2  .13  .13 |   -6.1   10.3   78.5
sio  114| .00  .01  .00   .13  -.22  -.03  -.1  .09  .09 |     .0     .0     .0

Table 2.0848.1   GPS week: 0848   Day: 1   MJD: 50181.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .01  .00  -.24   .22   .01   .0  .04  .04 |    3.9  -11.7    1.4
emr  28 | .01 -.02  .00   .64  -.32  -.03  -.1  .10  .10 | 1785.8   16.5     .5
esa  52 | .00  .00  .00  -.15  -.17  -.16   .0  .08  .07 |  -22.1    1.5    5.8
gfz  45 |-.03 -.05 -.01   .15   .12  -.31  -.1  .11  .11 | 1787.6   17.7     .5
igp  n/a| .01  .00  .00   .10  -.18   .34   .1  .76  .06 |    -.2     .3     .6
jpl  37 |-.01  .02  .00  -.40  -.01  -.15   .0  .06  .06 | 1787.0   17.6     .5
ngs  43 | .01 -.06  .05  -.08   .20  -.18  -.5  .16  .15 |    -.3   -1.0   76.4
sio  111| .00  .01  .00   .31  -.09   .44   .0  .06  .06 |     .0     .0     .0

Table 2.0848.2   GPS week: 0848   Day: 2   MJD: 50182.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .01  .01  .00  -.38   .06   .09   .1  .10  .05 |     .8  -19.6    1.5
emr  27 | .01  .00 -.01   .75  -.31  -.05   .1  .19  .11 | 1805.5   12.3     .6
esa  52 | .01  .00 -.01   .04   .19  -.38   .1  .08  .08 |   11.2   -9.8    5.4
gfz  45 |-.03 -.06  .00   .30   .06  -.46  -.2  .10  .10 | 1806.6   12.0     .5
igp  n/a| .02  .00 -.01   .06   .11   .13  -.1  .14  .06 |    1.5   -3.8     .8
jpl  37 | .01  .02  .01  -.20   .17  -.08   .0  .06  .06 | 1806.0   12.8     .5
ngs  45 | .00 -.08  .05  -.19   .20  -.13  -.3  .16  .16 |     .5   -3.8   78.3
sio  112|-.01  .01  .01   .04  -.30   .66   .0  .07  .07 |     .0     .0     .0

Table 2.0848.3   GPS week: 0848   Day: 3   MJD: 50183.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .01  .01  .00  -.52   .08   .10   .0  .07  .05 |   -4.3   -1.7    1.4
emr  27 | .01 -.01 -.01   .97  -.31   .49   .0  .13  .14 | 1823.0   26.9     .7
esa  50 | .01  .01 -.01  -.34   .00  -.07  -.1  .08  .08 |   10.0   17.3    5.7
gfz  43 |-.04 -.05  .00   .24   .14  -.27  -.2  .12  .12 | 1823.6   27.4     .6
igp  n/a| .01  .00  .00   .24   .03   .40   .2  .11  .07 |   -1.7     .3     .9
jpl  37 | .00  .01  .00  -.09   .14   .14   .1  .05  .05 | 1823.5   27.7     .7
ngs  41 | .01 -.07  .04  -.27   .38  -.10  -.2  .15  .15 |   -5.9    6.1   80.3
sio  107|-.01  .01  .00   .30  -.39  -.49   .0  .07  .07 |     .0     .0     .0

Table 2.0848.4   GPS week: 0848   Day: 4   MJD: 50184.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .01  .01  .00  -.61   .17  -.17   .1  .05  .05 |  -11.8    5.7    1.6
emr  26 | .01 -.01 -.01   .99  -.37   .81  -.1  .09  .09 | 1851.6   28.4     .8
esa  50 | .01  .02  .00  -.10   .15  -.08   .0  .09  .09 |  -23.6  -12.0    6.9
gfz  46 |-.04 -.05 -.01   .23   .19  -.18  -.2  .11  .11 | 1853.2   28.3     .8
igp  n/a| .01  .00  .01   .10   .19   .38  -.2  .10  .05 |    1.1   -4.5     .9
jpl  37 | .00  .00  .01  -.14   .05   .25   .1  .06  .06 | 1852.5   29.0     .9
ngs  43 | .01 -.06  .05  -.10  -.13  -.64  -.4  .15  .16 |  480.8 -835.0 6005.0
sio  105| .00  .01  .00   .21  -.23  -.51   .1  .08  .08 |     .0     .0     .0

Table 2.0848.5   GPS week: 0848   Day: 5   MJD: 50185.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .02  .00  -.70   .22  -.32  -.1  .06  .05 |    8.2  -17.9    1.8
emr  28 | .02  .00 -.01   .85  -.40   .47   .0  .08  .08 | 1891.6   14.6     .6
esa  51 | .00  .02  .00  -.34   .05  -.33  -.1  .11  .10 |   32.8  -33.2    7.1
gfz  46 |-.03 -.05 -.01   .07   .10   .16  -.2  .10  .10 | 1892.8   14.5     .5
igp  n/a| .01  .00  .01   .00  -.16   .35   .0 1225  .10 |     .5   -2.7     .8
jpl  37 | .01  .01  .00   .25   .43   .21   .2  .10  .10 | 1892.8   15.2     .6
ngs  44 | .00 -.04  .06  -.50   .22  -.60  -.3  .16  .16 |    6.1  -13.8   77.3
sio  110| .00  .01  .01   .18  -.27   .18   .0  .08  .08 |     .0     .0     .0

Table 2.0848.6   GPS week: 0848   Day: 6   MJD: 50186.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  66 | .01  .01  .00  -.52   .27  -.55   .0  .06  .06 |    5.0   -5.6    1.6
emr  29 | .00  .00  .00   .79  -.04   .73   .0  .10  .10 | 1914.2   30.8     .7
esa  52 | .00  .02  .00  -.22   .15  -.04  -.2  .10  .09 |    3.7   38.8    5.5
gfz  46 |-.03 -.05 -.02   .17   .41  -.06  -.3  .12  .12 | 1915.2   32.0     .6
igp  n/a| .01  .00  .00   .06   .32   .12  -.1  .17  .08 |   -2.1    1.3    2.1
jpl  37 | .00  .01  .01  -.27  -.47   .20   .0  .06  .06 | 1914.8   31.7     .7
ngs  44 | .02 -.07  .02   .42   .54  -.49   .0  .17  .17 |   -3.3   10.1   76.6
sio  109| .00  .01  .01   .11  -.20   .07   .0  .08  .08 |     .0     .0     .0

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

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

         Units: cm.

Table 3.0848.0   GPS week: 0848   Day: 0   MJD: 50180.0

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

Table 3.0848.1   GPS week: 0848   Day: 1   MJD: 50181.0

               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  12  10  14   6   7  18   6    4 |    3  10   7  14   8   6  17   5    5
   2  |   3   7   5  10   5   6  19   5    3 |    3   7   6   9   9   5  11   7    3
   3  | ---   5 --- --- 379 --- --- ---    0 |  ---  75 --- --- 120 --- --- ---   86
   4  |   3   8   9  12   4   7   9   8    3 |    3  10   8  12   7   7  12   8    5
   5  |   5   6   5   9   4   6  16   5    3 |    6   7   7  10   8   6   9   6    4
   6  |   6   8   6  12   8   5  16   7    3 |    4   7   7  11   8   7  13   5    4
   7  |   5   9   6   9   6   6  16   3    3 |    4  10  10  14  11   8  11   8    7
   9  |   4   9   6  11   5   5  13   6    3 |    4  11   8  13   7   6  15   6    4
  14  |   5   9   6  13   5   5  20   9    3 |    5  11   8   9   9   6  14   9    6
  15  |   5  13   8   8  11   4  11   7    3 |    3   7   8  10  10   7  11   5    4
  16  |   4  14  11  10   6  10  12   8    4 |    4  11  10   7   8   5  12   5    4
  17  |   5  13   6  14   6   5  17   6    3 |    3   7   7  13   8   7  13   4    4
  18  |   4  13   8  12   4   6  15   8    4 |    4  10   7  10   7   5  16   7    4
  19  |   5  11   7  13   5   6  16   5    3 |    5  12   8  10   8   8  16   7    5
  20  |   3   8   5  10   5   5  16   6    3 |    5   8   7   8   6   7  11   7    3
  21  |   2   9   8  10   5   5  17   5    3 |    4   7   7   7  10   7  12   6    5
  22  |   4   5   6   7   6   7  12   7    3 |    4   6   8   8   7   7  10   6    4
  23  |   5  10   8   7   7   6  23   3    3 |    6   8  11   7  11   9  14   8    6
  24  |   3   6   5  10   6   8  16   6    3 |    4   9   7  15   7   6  13   6    4
  25  |   6   8  12  11   8   5  17   6    3 |    5   9   8  13   9   6  13   5    5
  26  |   5  12   9  18   4   7  21   6    4 |    6   9  15  14   9   8  20   9    6
  27  |   4   8   6  14   4   5  16   5    3 |    5  11   8   9  10   5  12   6    5
  28  |   4  11   8  10   8   6   9   6    3 |    4   7  11  13  12   8  13   5    4
  29  |   4   9   6  14   6   5  12   5    3 |    4   9   8  10   9   6  11   7    4
  31  |   3  12   9  12  10   7  11  11    4 |    3  11  12  13  12   6  10   6    4
------|--------------------------------------|--------------------------------------
 RMS  |   4  10   8  11  76   6  16   6      |T   4  17   8  11  25   6  13   6   17
 WRMS |   4  10   7  11   6   6  15   6      |NE  4  17   8  11  25   6  13   6   17

Table 3.0848.2   GPS week: 0848   Day: 2   MJD: 50182.0

               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  10  10  11   4   5  16   6    3 |    4  10   8  13   8   6  19  10    5
   2  |   3   4   9   8   7   5  17   7    3 |    3   6   8   8   7   6  14   9    4
   3  |  42  79 --- ---  64 --- --- ---   57 |   29  84 --- ---  80 --- --- ---  115
   4  |   4   7   6   8   4   7  11   6    3 |    4   8  11  12   7   7  13   7    5
   5  |   5   6   5   7   3   5  18   6    3 |    5   7   7  10   6   4  14   9    4
   6  |   5   8   7   7   6   5  15   8    3 |    4   9   7  11   9   5  13  12    4
   7  |   6  17   8   7   5   4  16   5    3 |    6  17   9  13   9   7  12  10    7
   9  |   6  16   7  12   7   5  14   7    4 |    4  16   6  17   7   4  13  10    4
  14  |   6   6  10  11   6   4  15   6    3 |    5  11  10  10   8   7  14  11    7
  15  |   6  10   6  10   8   4  12   4    3 |    4   9   8  11  11   9  15  10    7
  16  |   5  13  11  10   7   7  15  10    4 |    5  12  11   9  11   6  14  12    6
  17  |   5  10   5  14   7   7  19   6    4 |    4   9   7  15   7   8  18   9    4
  18  |   5  11   8  12   5   5  10   7    3 |    4  11   8  12   5   5  10  10    4
  19  |   5  12   7  11   6   6  18   5    3 |    5  12   8  13   9   6  19   8    5
  20  |   5  11   6   7   4   6  17   4    3 |    5   8   7  10   6   5  12   8    3
  21  |   3   5   7  10   6   6  17   6    3 |    4   8   8  10   7   9  15  10    5
  22  |   4  12   7   7   5   7  10  12    4 |    4  12  10   9   5   6  11  13    4
  23  |   6   8   9   9   5   5  22   5    3 |    7   7  11   9   9   9  13  14    7
  24  |   5   7   6   7   5   6  19   6    3 |    4  10   9  13   9   5  14   7    5
  25  |   4   7   8   8   9   5  20   8    3 |    4   8   8  14   8   8  16  12    6
  26  |   6  12   9  13   7   5  18   9    4 |    7  11  15  15   8   6  15  14    6
  27  |   4   7   7  12   5   6  18   5    3 |    5   9   8  10   9   6  13  10    5
  28  |   4  11   8  10   6   6  14   7    3 |    4   9  10  14   8   4  14  10    5
  29  |   4   7   6  10   3   4  14   6    3 |    4  10   7  11   7   5  13  11    4
  31  |   5  15   8  10  12   6  11   6    3 |    4  14  11  12  14   6  15  10    6
------|--------------------------------------|--------------------------------------
 RMS  |  10  19   8  10  14   6  16   7      |T   7  19   9  11  17   6  14  10   23
 WRMS |   5  11   8  10   6   6  16   7      |NE  7  19   9  11  17   6  14  10   23

Table 3.0848.3   GPS week: 0848   Day: 3   MJD: 50183.0

               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  11   9  12   6   6  14   7    3 |    4  10   6  11   7   7  18   4    4
   2  |   3   7   8  10   8   4  12   7    3 |    5   8   9   8   9   5  14   7    4
   3  |  26  47 --- ---  46 --- --- ---   35 |   35  76 --- ---  58 --- --- ---   65
   4  |   3   7   7  10   4   5  14   7    3 |    4   9   7  14   6   5  17   7    4
   5  |   4   7   6   6   4   3  16   8    3 |    5   9   6  10   7   6  11   4    4
   6  |   5  10   8  14   8   4  19  11    4 |    5   6   5  12  10   5  20  11    4
   7  |   5  10   8  12   7   6  15   6    3 |    5  10   9  17   8   6  14   8    5
   9  |   6   8   6  17   7   5  10   6    3 |    4  10   6  14   7   6  12   6    4
  14  |   5  10   9   7   5   3  16   6    3 |    7   9   9  11   6   7  13   8    6
  15  |   6   6   7  12   7   4  13   8    3 |    4   9   9  12   9   8   9   7    5
  16  |   2  11  10  10   7   4  12   9    3 |    6   9  12  10   6   5   9   6    6
  17  |   6  11   6  18   8   5  16   7    4 |    4   9   9  18   6   5  13   6    4
  18  |   5   6   8  12   5   4  13   9    3 |    5   7   6  12   7   5  12   8    4
  19  |   7  10   8  14   4   4  15   5    3 |    6  14   8  19   7  10  20   9    9
  20  |   5  11   7  12   4   3  13   6    3 |    5   8   7  12   6   5  11   4    4
  21  |   2   6   5  10   8   6   9   9    3 |    6   8   8  11  10  10  13   9    7
  22  |   3   6  12   8   5   5  11   8    3 |    3   7  13  11   6   8  10   4    5
  23  |   6   8   6   7   7   4  17   8    3 |    7  10  13   8   8  10  12  12    8
  24  |   2   8   7  10   5   6  14   7    3 |    4  12   7  13   8   5  15   7    4
  25  |   4  10  10   9   9   7  18   7    3 |    6  10   9  13   7  10  18   7    6
  26  |   3  10   8  15   6   4  18   7    3 |    6   9  13  15   8   8  15   8    7
  27  |   5   8   9  16   6   4  15   4    3 |    5  10   8  15   7   7  16   5    6
  28  |   6   9  11  12   4   4  14   5    3 |    5   9   9  14   9   7  10   6    5
  29  |   4   6   8  11   6   4  14   6    3 |    4   8   6  12   9   4  11   5    3
  31  |   5  11   8  10   8   6  20   8    4 |    5  13   8  12  14   9  14   4    6
------|--------------------------------------|--------------------------------------
 RMS  |   7  13   8  12  11   5  15   7      |T   8  17   8  12  13   7  13   7   14
 WRMS |   5  14   8  12   7   5  15   7      |NE  8  17   8  12  13   7  13   7   14

Table 3.0848.4   GPS week: 0848   Day: 4   MJD: 50184.0

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

Table 3.0848.5   GPS week: 0848   Day: 5   MJD: 50185.0

               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 --- >>> --- --- ---    0 |  --- ---   0 ---  14 --- --- ---  ---
   2  |   7   5  10   8   6  18  17   5    4 |    5   7   7   8   7  20  16   8    5
   3  |  16  19 --- ---  61 --- --- ---   17 |   30  28 --- ---  39 --- --- ---   27
   4  |   4   8   9   9   4  10  20   7    4 |    4   8   7  12   8  10  18   6    4
   5  |   5   6   8   6   6   8  19   6    3 |    5   8   8   8  10  12  12   5    6
   6  |   8   7  10  13   4   8  17  10    4 |    6   7   6  11   7  10  16   9    5
   7  |   5   9   9   7   4   9  18   6    3 |    4  10   7  12   9   9  14   9    6
   9  |   5   7   8  14   5   9  12   6    3 |    5   7   6  13   6   7  12   7    4
  14  |   7   6   9   7   7   6   9  12    3 |    6  10   8  10  10  10  13   8    6
  15  |   7   6   9   9  13   7  15   6    3 |    5  10  10  10  14   8  13   5    6
  16  |   5  11  23   7  13 ---  13  14    6 |   13  15  19  13  18 ---  12  16   12
  17  |   4   8  13  13   6  11  13   6    4 |    4   9   9  12  10  12  16   7    5
  18  |   4   6   5  10   5  11  12   6    3 |    4   8   7  10   8  13  11   5    4
  19  |   6   4  10  11   8  13  21   5    4 |    5   8   8  13   9  11  21   6    5
  20  |   3   5  12   9   4   7  17   6    3 |    5   5   7  10   7  10  10   4    4
  21  |   5   4   8   7   3   8  14  10    3 |    5   7   8  11  10   6  14   9    5
  22  |   3   7   8   7   5  11  15   5    3 |    3   6   8   9   7  11  12   4    4
  23  |   6   7  14  11   8   7  15   6    4 |    6  10   9  11   9   9  14  10    7
  24  |   4   7  11  10   4  13  15   6    4 |    6  11   7  15   8  12  16   6    6
  25  |   6   8   8  14   7   9  23  10    4 |    8  10   9  14   8   9  19   8    6
  26  |   5   9  11  14   6  11  16   5    4 |    4   9  15  13   7   8  16  10    6
  27  |   5   5  10  11   3  11  21   6    4 |    7   8   8  11   8  11  17   6    5
  28  |   6   8  14   9   4   8  15   7    4 |    5   8  10  12   8   6  13   7    5
  29  |   7   6  10  10   5  11  17   7    4 |    5   8   9  13   9  12  14   7    4
  31  |   6  12  11  11   9   9  15   8    4 |    5  16  14  13  13   8  16   6    7
------|--------------------------------------|--------------------------------------
 RMS  |   6   8  11  10 >>>  10  16   8      |T   8  10   9  11  12  10  14   7    7
 WRMS |   5   8  10  10  10  10  16   8      |NE  8  10   9  11  12  10  14   7    7

Table 3.0848.6   GPS week: 0848   Day: 6   MJD: 50186.0

               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   7  10   8 ---  11 ---    4 |   13  14  13  12  14 ---  13 ---   13
   2  |   7  13   9   7   6   8  12   6    4 |    4  14   8   9   9  12  13   7    7
   3  |  12  19 --- ---  74 --- --- ---   16 |   20  34 --- ---  41 --- --- ---   25
   4  |   6   9   9  12   7   8  10   6    3 |    6   9   8  14   8   7  14   5    4
   5  |   5   5   7   7   7   7  15   6    3 |    6   7   6  10   8   8   8   5    5
   6  |   8   9   9  15  13   7  27  10    5 |    5   7   5  12   8   8  21  11    5
   7  |   6   9   6   9   8   5  19  12    4 |    5  11   7  13   8   5  19   6    5
   9  |   5   8   6  13   6   6  14   8    3 |    5  11   6  12   9   9  13   8    7
  14  |   6   5   6   9   8   4  15  10    3 |    7  10   9  12   9   7  13   7    8
  15  |   6   8   8  11  11   6  22   6    4 |    3  10   7  13   9   8  17   4    5
  16  | --- --- --- --- --- --- ---   2    0 |  --- --- --- --- --- --- ---  62   62
  17  |   4  11  10  17   7   6  19   7    4 |    4  10   9  12   9   9  18   8    8
  18  |   5   6   7  11   7   3  17   7    3 |    5  10   7  11   6   6  11   7    7
  19  |   9  12  11  14   7   6  15   5    4 |    6  16   8  17   8   9  16   8    8
  20  |   4   7  10   8   7   6  12   5    3 |    7   7   6  10   7   8  10   6    6
  21  |   4   4   7   8   6   6   8   9    3 |    9   8   9  10  10  10  12   7    6
  22  |   4   6   9  10   9   5  14   6    3 |    5   8  11  11   6   5  11   4    5
  23  |   7   9  10  10   5   7  18   7    4 |    8  10  12  13   9  12  12  10    9
  24  |   8  10  14  12   6  10  22  11    5 |    5   8   9  15   8   8  17   8    6
  25  |   4   7   9  15   6   6  16   7    3 |    4   9   9  14   7   7  15   7    6
  26  |   6  10  13  10  12   8  14   7    4 |    7  10  15  13   9   7  14  11    7
  27  |   8  17  11  13   7   7  16   8    5 |    7  18   8  10   7   9  15  10    6
  28  |   4   8  13  11   4   6  19   8    4 |    4   9  11  14   7   6  18   5    5
  29  |   5   6   8  14  10   4  21   5    3 |    4   9   6  14  12   7  11   8    6
  31  |   4  11  16  16   6   6  17  10    4 |    5  12  13  16  11   6  18   6    7
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  10  12  17   6  17   8      |T   7  12   9  12  12   8  14  14   14
 WRMS |   6  10   9  12   8   6  17   8      |NE  7  12   9  12  12   8  14  14   14

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 4.0848   GPS week: 0848   MJD: 50180.0-50186.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2148 |U  54   41   97 |U  49   40  105 |   46   31   79 |
emr | emr 2265 |   36   33   77 |   33   29   77 |U  29   15   48 |
esa | esa 1989 |  238  149  415 |U 201  128  353 |  228  133  270 |
gfz | gfz 1138 |   40   34   84 |U  36   33   81 |   25   16   45 |
igp | igp 2289 |   47   38   99 |   35   32   79 |   34   19   57 |
igs | igs 2329 |   44   35   85 |   36   30   84 |   38   21   61 |
jpl | jpl 2248 |U  37   34   78 |U  32   28   77 |   29   16   46 |

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 5.0848.0   GPS week: 0848   Day: 0   MJD: 50180.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2160 |   51   43   78 |   52   39   89 |   44   28   81 |
emr | emr 2296 |   36   34   59 |   42   28   76 |   25   16   47 |
esa | esa 1991 |  276  144  421 |  189  113  347 |  204  129  235 |
gfz | gfz 1152 |   34   39   57 |   49   30   60 |   26   19   56 |
igp | igp 2195 |   39   34   64 |   40   28   75 |   19   15   39 |
igs | igs 2303 |   38   34   60 |   40   28   73 |   24   17   49 |
jpl | jpl 2303 |   36   33   57 |   39   27   76 |   22   17   46 |

Table 5.0848.1   GPS week: 0848   Day: 1   MJD: 50181.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2135 |   65   37   88 |   42   35  113 |   40   26   81 |
emr | emr 2296 |   38   31   73 |   32   28   91 |   28   14   52 |
esa | esa 1991 |  261  183  455 |  217  184  353 |  227  120  250 |
gfz | gfz 1152 |   41   30   82 |   25   21   43 |   28   16   56 |
igp | igp 2361 |   37   31   77 |   33   30   96 |   27   15   56 |
igs | igs 2303 |   39   30   71 |   32   28   91 |   26   14   51 |
jpl | jpl 2303 |   35   28   72 |   32   26   91 |   25   13   49 |

Table 5.0848.2   GPS week: 0848   Day: 2   MJD: 50182.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2211 |   51   40   83 |   53   42  102 |   54   36   89 |
emr | emr 2287 |   28   28   65 |   34   27   67 |   38   20   63 |
esa | esa 2029 |  239  146  430 |  229  121  341 |  218  129  262 |
gfz | gfz 1152 |   31   25   67 |   39   34   80 |   24   17   42 |
igp | igp 2391 |   33   28   66 |   40   27   75 |   39   21   68 |
igs | igs 2353 |   31   28   64 |   36   28   71 |   40   21   65 |
jpl | jpl 2304 |   27   26   63 |   34   26   69 |   37   20   62 |

Table 5.0848.3   GPS week: 0848   Day: 3   MJD: 50183.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2080 |   56   40   94 |   48   33   81 |   40   31   72 |
emr | emr 2294 |   42   32   76 |   35   21   56 |   25   13   44 |
esa | esa 2003 |  234  137  432 |  189  106  378 |  218  128  234 |
gfz | gfz 1152 |   62   28   79 |   41   21   56 |   19   14   42 |
igp | igp 2346 |   53   35   84 |   35   24   56 |   25   14   50 |
igs | igs 2352 |   49   32   75 |   34   22   56 |   22   13   42 |
jpl | jpl 2301 |   50   31   73 |   34   20   61 |   21   13   37 |

Table 5.0848.4   GPS week: 0848   Day: 4   MJD: 50184.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2199 |   52   38  112 |   49   52  148 |   43   26   74 |
emr | emr 2295 |   35   30   85 |   33   46  124 |   28   14   38 |
esa | esa 2023 |  280  187  491 |  212  126  361 |  354  174  398 |
gfz | gfz 1152 |   33   25   74 |   36   59  164 |   28   17   38 |
igp | igp 2303 |   37   31   83 |   31   45  120 |   31   16   46 |
igs | igs 2369 |   39   34   98 |   35   44  130 |   27   21   54 |
jpl | jpl 2304 |   34   30   81 |   33   46  123 |   28   15   39 |

Table 5.0848.5   GPS week: 0848   Day: 5   MJD: 50185.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2106 |   56   47  108 |   50   40   99 |   53   33   83 |
emr | emr 2181 |   30   37   78 |   23   19   43 |   34   15   47 |
esa | esa 1978 |  190  131  339 |  178   92  321 |  156  106  243 |
gfz | gfz 1104 |   33   42   92 |   23   18   47 |   22   15   38 |
igp | igp 2238 |   40   35   79 |   23   24   40 |   36   20   57 |
igs | igs 2348 |   66   48  110 |   43   25   88 |   74   35  105 |
jpl | jpl 2110 |   32   38   82 |   20   18   40 |   37   15   44 |

Table 5.0848.6   GPS week: 0848   Day: 6   MJD: 50186.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2144 |   47   42  112 |   45   36   84 |   46   36   70 |
emr | emr 2204 |   39   35   98 |   28   25   48 |   25   15   43 |
esa | esa 1908 |  160   95  309 |  187  136  368 |  155  137  229 |
gfz | gfz 1104 |   40   41  119 |   33   26   47 |   22   15   35 |
igp | igp 2191 |   77   61  184 |   37   37   66 |   49   28   73 |
igs | igs 2277 |   38   35  102 |   28   26   53 |   25   19   37 |
jpl | jpl 2112 |   38   45  105 |   28   26   46 |   28   16   41 |

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