Subject: [IGSREPORT-2577] Wk 0847 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 15 Apr 1996 19:53:50 PDT

******************************************************************************
IGS Electronic Report    Mon Apr 15 19:53:50 PDT 1996      Message Number 2577
******************************************************************************

Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0847 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0847   (Mar 31, 1996 - Apr 06, 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 (IGS08477.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:

 IGS08470-6.SP3  IGS GPS ephemeris files for days 0-6, week 0847 in SP3 format.
 IGS08477.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08477.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 days 2 and 4 (Apr 2 and 4) were
   caused by clock jumps on PRN02 and PRN04 respectively.

5. Note that PRN12, a non-SA satellite, was set unhealthy starting on Nov. 18,
   1995 (wk827, day 6) and was disposed of on Mar. 26, 1996 (wk846, day2) 
   (Ref. NANU 051-96086). 

   Also, a new GPS satellite, PRN03, was launched on Mar 28 at 00:21 
   (wk846/day 4). According to NANU 068-96100, PRN03 will be usable on Apr 9/96
   starting at 21:17 (wk848/day 2). Before this time, PRN03 is to be used with
   caution.

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

          Day (Date) |   TIME   | PRN | Centres  | Reason
         ------------+----------+-----+-------------------------------------
          1 (Apr 01) | 00:00:00 | 16  |   ALL    | Modeling problems

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

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08477.SUM).

Table 1: Week 0847 summary.                       (Mar 31, 1996 - Apr 06, 1996)

Table 1.0847.a   GPS week: 0847   MJD: 50173.0-50179.0

         Mean and standard deviations of transformation parameters.
         WRMS - orbit RMS weighted by the SP3 header accuracy codes.
         STA  - Mean number of stations in the daily solutions.
         Units: meters, mas, ppb, nano-sec, nano-sec/day.

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  66 | .00  .01  .00  -.26   .05   .07   .1  .06  .05 |     .0   -8.7    1.4
        | .00  .00  .00   .11   .07   .11   .1           |    3.2    7.1
emr  28 | .01 -.01  .00   .45  -.09   .30  -.1  .10  .10 | 1676.2   17.3     .6
        | .01  .01  .01   .14   .11   .23   .1           |   46.6    8.9
esa  53 | .01  .01  .00  -.11  -.02  -.03   .1  .09  .07 |   -5.1    2.8    6.1
        | .01  .01  .00   .15   .21   .09   .1           |   11.1   12.5
gfz  47 |-.04 -.05 -.01   .16   .04  -.28  -.4  .12  .11 | 1677.9   17.4     .6
        | .00  .01  .01   .12   .09   .18   .1           |   46.5    8.8
igp  n/a| .01 -.01  .00   .43  -.05   .17   .0  .06  .06 |     .6   -1.8     .9
        | .01  .00  .00   .18   .22   .12   .1           |    1.6    3.4
jpl  37 | .01  .02  .00  -.04   .05  -.15   .1  .07  .07 | 2052.8   31.4     .6
        | .00  .01  .00   .07   .10   .11   .1           |  995.5   36.2
ngs  47 | .01 -.06  .02   .02   .21  -.09  -.1  .15  .15 |   -3.8   31.6 7919.4
        | .01  .01  .01   .20   .08   .32   .1           |   11.1   92.8
sio  112| .00  .02  .00   .04  -.02   .00   .0  .08  .08 |     .0     .0     .0
        | .01  .00  .01   .10   .18   .25   .1           |     .0     .0

Table 1.0847.b   GPS week : 0847   MJD: 50173.0-50179.0

         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   4   4   4   4   4   3 |
   2  |   2   3   3   3   3   3   3 |
   4  |   3   4   3   2   3   3   3 |
   5  |   3   3   3   2   2   3   3 |
   6E |   4   5   4   4   5   5   3 |
   7E |   4   4   4   3   3   4   3 |
   9  |   4   3   4   3   3   3   3 |
  14  |   3   3   3   3   4   3   3 |
  15  |   3   3   3   3   3   3   4 |
  16  |  10   6   4   3   3   8   7 | Modeling problems on day 0.
  17  |   3   3   3   3   4   4   4 |
  18  |   4   3   3   3   4   3   3 |
  19  |   3   3   3   3   4   4   3 |
  20  |   3   3   3   2   3   2   2 |
  21  |   3   3   3   3   3   3   3 |
  22  |   3   3   4   3   3   3   3 |
  23  |   3   3   3   3   3   4   4 |
  24  |   3   3   3   3   2   3   3 |
  25  |   4   4   4   4   4   4   4 |
  26  |   5   3   4   4   3   4   4 |
  27  |   4   3   4   3   3   3   3 |
  28E |   4   4   4   4   4   3   3 |
  29  |   4   3   3   3   3   3   3 |
  31E |   5   5   4   4   4   4   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 2.0847.0   GPS week: 0847   Day: 0   MJD: 50173.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  66 | .00  .01  .00  -.44   .12   .11   .1  .06  .05 |   -2.1   -2.0    1.4
emr  29 | .01 -.01 -.01   .55  -.22   .38  -.2  .09  .09 | 1607.8   21.9     .6
esa  51 | .01  .01  .00  -.21   .37   .03   .1  .10  .08 |   -5.9   -6.6    6.7
gfz  46 |-.04 -.05  .00   .22   .13  -.46  -.2  .12  .12 | 1609.6   22.0     .6
igp  n/a| .00  .00  .00   .41  -.20   .14   .1  .07  .05 |    -.2     .9     .6
jpl  37 | .00  .00  .00  -.01  -.15  -.14   .0  .08  .08 | 1608.6   22.7     .6
ngs  48 | .02 -.05  .03   .15   .25  -.12  -.1  .16  .16 |   -2.9    3.0   78.2
sio  114| .00  .01  .01   .07  -.25  -.28   .1  .10  .09 |     .0     .0     .0

Table 2.0847.1   GPS week: 0847   Day: 1   MJD: 50174.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .01  -.18  -.03   .13   .1  .06  .05 |    5.7  -16.5    1.4
emr  29 | .02  .00  .00   .52  -.17   .37   .0  .10  .10 | 1639.0    6.3     .5
esa  53 | .01  .01 -.01  -.40   .08  -.03   .2  .09  .08 |   10.7   -3.8    6.5
gfz  48 |-.03 -.05 -.01   .27   .19  -.22  -.4  .11  .11 | 1640.0    6.7     .5
igp  n/a| .01  .00  .00   .59  -.23   .03  -.1  .05  .05 |     .9   -2.8     .6
jpl  37 | .01  .03  .00  -.20   .16  -.36  -.1  .07  .07 | 1639.7    7.6     .5
ngs  48 | .02 -.06  .03  -.28   .18  -.40   .0  .14  .14 |    5.5  -17.4   78.6
sio  115| .01  .02  .00   .22  -.17   .40   .1  .08  .08 |     .0     .0     .0

Table 2.0847.2   GPS week: 0847   Day: 2   MJD: 50175.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .01  -.38   .05   .09   .1  .05  .05 |   -1.7   -7.9    1.4
emr  29 | .00 -.01 -.01   .61  -.03  -.15  -.1  .09  .09 | 1653.5   27.9     .6
esa  54 | .01  .01 -.01  -.01  -.13   .00   .0  .09  .09 |    7.6   25.6    6.4
gfz  49 |-.04 -.04  .00   .16   .01   .00  -.4  .11  .11 | 1655.7   27.7     .6
igp  n/a| .01 -.01  .00   .14  -.08   .41   .0  .05  .05 |   -1.2    2.6     .6
jpl  37 | .01  .02  .00  -.08   .12  -.12   .2  .06  .06 | 1654.5   28.6     .6
ngs  51 | .02 -.05  .03   .27   .15  -.04  -.4  .14  .14 |  -27.7  241.420950.0
sio  112|-.01  .02 -.01  -.08   .00   .15   .2  .10  .10 |     .0     .0     .0

Table 2.0847.3   GPS week: 0847   Day: 3   MJD: 50176.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .00  -.27   .07   .04   .1  .05  .04 |   -1.8   -5.9    1.4
emr  30 | .01 -.01  .00   .36  -.06   .32  -.2  .08  .08 | 1678.7   18.2     .5
esa  55 | .00  .00  .00   .00  -.02   .09   .2  .08  .07 |   -9.6    3.3    6.3
gfz  48 |-.03 -.05 -.02   .12   .00  -.24  -.3  .10  .10 | 1680.8   17.8     .5
igp  n/a| .01 -.02  .00   .22  -.21   .20   .1  .07  .06 |   -1.0     .1     .7
jpl  37 | .01  .01  .00  -.02   .06  -.12   .1  .05  .05 | 4307.9  111.1     .5
ngs  48 | .00 -.05  .02   .17   .08  -.24  -.3  .15  .15 |   -3.1    4.3   78.4
sio  111| .00  .02  .01   .03  -.07  -.10   .1  .07  .06 |     .0     .0     .0

Table 2.0847.4   GPS week: 0847   Day: 4   MJD: 50177.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  66 | .00  .02  .00  -.26   .14   .11   .0  .05  .05 |   -1.6   -4.6    1.4
emr  26 | .00  .00  .00   .44  -.15   .19  -.1  .10  .10 | 1696.0   15.7     .5
esa  54 | .02  .01  .00  -.03  -.04  -.10   .1  .08  .07 |   -3.8    5.0    5.5
gfz  46 |-.03 -.05 -.01  -.09   .00  -.16  -.4  .11  .11 | 1697.6   15.7     .6
igp  n/a| .02 -.01 -.01   .54   .24   .13   .1  .07  .07 |    2.7   -6.0    1.7
jpl  37 | .01  .02  .01   .03   .06  -.01   .0  .06  .06 | 1697.7   16.5     .5
ngs  44 | .00 -.07  .01   .05   .28   .55   .0  .15  .16 |    3.5   -7.5  298.3
sio  109| .00  .02  .01   .08  -.10  -.29  -.1  .07  .06 |     .0     .0     .0

Table 2.0847.5   GPS week: 0847   Day: 5   MJD: 50178.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .00  .01  .00  -.12   .05  -.17   .2  .07  .06 |   -1.8   -3.4    1.2
emr  27 | .01 -.02  .01   .20  -.12   .57  -.1  .11  .11 | 1714.8   25.8     .6
esa  53 | .00  .01 -.01  -.10  -.31  -.03   .0  .09  .07 |  -18.6    9.2    5.9
gfz  46 |-.04 -.06 -.02   .23  -.06  -.34  -.6  .15  .13 | 1716.5   26.5     .6
igp  n/a| .01  .00 -.01   .61   .28   .16   .0  .07  .05 |     .1   -1.1     .6
jpl  37 | .01  .02  .00   .00   .09  -.15   .1  .07  .07 | 1716.3   27.0     .6
ngs  47 | .00 -.06  .02  -.08   .26   .03  -.1  .14  .14 |   -3.5    2.1   78.5
sio  112|-.01  .02  .00  -.01   .19  -.01   .1  .07  .06 |     .0     .0     .0

Table 2.0847.6   GPS week: 0847   Day: 6   MJD: 50179.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .00  .00  -.21  -.04   .17   .1  .06  .05 |    3.4  -20.5    1.4
emr  26 | .01  .00  .01   .51   .10   .45   .0  .12  .12 | 1743.6    5.1     .7
esa  53 | .00  .00 -.01   .02  -.11  -.16   .0  .07  .06 |  -16.1  -12.7    5.5
gfz  45 |-.03 -.05  .00   .17  -.02  -.52  -.3  .11  .11 | 1745.0    5.5     .6
igp  n/a| .02 -.01  .00   .50  -.11   .12   .2  .07  .06 |    2.8   -6.2     .8
jpl  37 | .01  .02  .00  -.04   .02  -.13   .1  .06  .06 | 1744.6    6.1     .7
ngs  45 | .01 -.06  .02  -.17   .26  -.38  -.1  .16  .16 |    1.3   -4.7   76.9
sio  108| .00  .02  .00  -.06   .25   .14  -.2  .07  .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 3.0847.0   GPS week: 0847   Day: 0   MJD: 50173.0

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

Table 3.0847.1   GPS week: 0847   Day: 1   MJD: 50174.0

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

Table 3.0847.2   GPS week: 0847   Day: 2   MJD: 50175.0

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

Table 3.0847.3   GPS week: 0847   Day: 3   MJD: 50176.0

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

Table 3.0847.4   GPS week: 0847   Day: 4   MJD: 50177.0

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

Table 3.0847.5   GPS week: 0847   Day: 5   MJD: 50178.0

               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  15  11  10   4   7  18   6    4 |    6  12   7  13   9   7  20   4    5
   2  |   6   6   6  13   4   4  12   6    3 |    4   8   5  15   7   6  10   6    4
   4  |   4   9   9  12   3   6  10   5    3 |    5   8  11  13   8   4  12   5    6
   5  |   4   5   6  11   4   6  11   5    3 |    5   7   8  10   6   6   9   6    5
   6E |   7   6  20  10  12   8  18   8    5 |   13  13  22  21  16  15  22  14   12
   7  |   4  12   9  10   6   6  14   9    4 |    6  12   8  15  12   8  15   8    7
   9  |   3   8   5  12   6   5  15   5    3 |    5   7   7  13   8   7  13   6    5
  14  |   4   9   8  10   5   9  12   7    3 |    5  10   5  11   6   5  12   7    6
  15  |   5  13   6  11   7   5  12   5    3 |    4   8   8  11   9   7  10   4    5
  16  |  15  18  22  38  17  16  16  13    8 |   21  29  39  42  34  34  33  30   28
  17  |   7  12   5  20   6   7  15   6    4 |    4   7   6  17   7   7  11   4    5
  18  |   6  10   5  15   4   5  11   8    3 |    6   7   5  13   6   5  11   6    5
  19  |   8  12   8  13   6   6  20   5    4 |    7   9   8  12   8   6  19   6    6
  20  |   4   5   4   8   3   6  11   4    2 |    5   5   7   8   7   5  11   4    5
  21  |   4  10   7   8   4   6  12   6    3 |    3   9   7  11   7   6  13   3    4
  22  |   8   6   7   9   5   5  14   6    3 |    4   7   8   7   6   7   8   4    4
  23  |   8  13   7   9   3   6  17   5    4 |    7  11  10  13   9   8   8   7    8
  24  |   7   6   7  16   6   7  14   7    3 |    7   8   7  17   9   5  13   6    5
  25  |   4  15   7  14   5   5  17   6    4 |    7   9  10  13   9   5  22   6    7
  26  |   7  12  11  19   7   7  16   7    4 |    4  13  13  12   9   8  13   6    7
  27  |   7  11   6  15   5   6  15   5    3 |    9  12   9  18   8   8  13   6    7
  28  |   5   8   8  10  11   7  12   8    3 |    5   9   8  12   8   9  12   6    6
  29  |   6   8   8  14   4   6  13   7    3 |    5   9   7  12   7   5  14   6    5
  31  |   7  17   8  13  12   7  14  10    4 |    8  16  10  12  12   8  11   6    6
------|--------------------------------------|--------------------------------------
 RMS  |   7  11   9  15   7   7  14   7      |T   7  11  12  15  10   9  15   8    8
 WRMS |   6  11   7  13   5   7  14   6      |NE  7  11  11  15  10   9  14   8    8

Table 3.0847.6   GPS week: 0847   Day: 6   MJD: 50179.0

               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  15   7  10   4   6  14   6    3 |    6  10   9  13   9   5  19   4    6
   2  |   3   7   7   8   3   4  13   5    3 |    5   9   6  11   7   5  13   3    5
   4  |   3   6   6  12   5   6  16   6    3 |    6  10   8  12   6   6  10   6    6
   5  |   5   5   5   7   6   5  17   6    3 |    6   6   5  12   7   8  15   3    7
   6  |   6   8   7   9   4   6  19   9    3 |   13  14  13  15  16  15  22  17   12
   7  |   5  12   9   7   8   5  15   6    3 |    9  14  11  14   9   8  17   7   10
   9  |   5   7   4  12   4   5  17   7    3 |    5   7   6  13   6   4  14   6    4
  14  |   4  10   5  11   4   6  16   6    3 |    7  10   5  11   6   6  15   5    5
  15  |   4  21   4   8   8   7  16   9    4 |    5  13   8  11   8   7  16   6    6
  16  |  15  26  20  13  13  10  23  16    7 |   27  46  34  35  42  36  40  37   34
  17  |   8  14   6  15   7   6  14   6    4 |    4   9   7  14  10   6  11   5    6
  18  |   6  11   7  12   4   7  12   7    3 |    5   9   6  11   6   8  13   7    6
  19  |   5  11   6  11   8   5  18   6    3 |    5  11   9  12   9   6  14   7    6
  20  |   3   9   5   8   5   5  11   5    2 |    6   8   6  11   7   6  12   4    7
  21  |   4  11   5   9   3   5  15   5    3 |    6   9   8  11   8   8  18   4    7
  22  |   4   6   4   8   4   5  16   8    3 |    4  10   9   9   8   7  13   4    5
  23  |   8  14   7   7   4   5  19   5    4 |   11  13  12  13  12  12  16  10   11
  24  |   5   8   5   9   6   5   7   8    3 |    7  11   8  12   8   5  11   5    7
  25  |   6   9   6  12  12  10  21   7    4 |    6  12   9  14   9  11  20   7    8
  26  |   4  15   9  17   5   6  20   8    4 |    6  10  13  15   9   8  13   6    8
  27  |   4   7   5  10   5   5  19   6    3 |   10  12  10  13   8   8  17   8    8
  28  |   4   7   9  11  11   9  11   8    3 |    9  12  14  15  13  12  15  10   10
  29  |   5  11   5  14   4   7  16   4    3 |    4  10   6  10   6   7  14   8    5
  31  |   5  12   7   9  10   7  12  10    3 |   10  17  13  14  15  10  13  10   10
------|--------------------------------------|--------------------------------------
 RMS  |   6  12   7  11   7   6  16   7      |T   8  14  11  14  12  10  16  10   10
 WRMS |   5  12   6  11   6   6  16   6      |NE  8  14  11  14  12  10  16  10   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 4.0847   GPS week: 0847   MJD: 50173.0-50179.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2225 |U  58   38   96 |U  48   40  106 |   41   28   65 |
emr | emr 2288 |   41   29   76 |   36   31   80 |U  27   14   39 |
esa | esa 2011 |  265  153  475 |U 218  122  375 |  238  146  271 |
gfz | gfz 1145 |   42   29   80 |U  40   36   89 |   26   17   41 |
igp | igp 2280 |   43   31   82 |   37   34   83 |   28   18   47 |
igs | igs 2304 |   41   28   78 |   36   32   81 |   26   15   39 |
jpl | jpl 2300 |   39   28   75 |U  35   31   79 |   27   15   40 |

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

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

Table 5.0847.0   GPS week: 0847   Day: 0   MJD: 50173.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2247 |   49   39  106 |   42   30   93 |   43   26   67 |
emr | emr 2301 |   39   27   85 |   32   19   56 |   31   14   34 |
esa | esa 1989 |  304  172  471 |  222  118  434 |  260  153  277 |
gfz | gfz 1104 |   47   30  100 |   36   22   67 |   27   17   35 |
igp | igp 2293 |   44   28   88 |   33   21   61 |   28   14   38 |
igs | igs 2304 |   38   27   85 |   31   20   62 |   28   13   36 |
jpl | jpl 2293 |   40   25   84 |   31   18   55 |   30   13   31 |

Table 5.0847.1   GPS week: 0847   Day: 1   MJD: 50174.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2252 |   52   38   83 |   47   36   95 |   40   30   62 |
emr | emr 2299 |   39   26   81 |   34   22   77 |   27   14   39 |
esa | esa 2011 |  298  158  515 |  227  128  408 |  249  143  284 |
gfz | gfz 1152 |   41   26   84 |   41   24   95 |   26   17   41 |
igp | igp 2304 |   40   27   81 |   34   25   76 |   24   14   42 |
igs | igs 2304 |   37   28   77 |   34   24   75 |   26   14   39 |
jpl | jpl 2294 |   34   26   79 |   34   25   76 |   27   14   38 |

Table 5.0847.2   GPS week: 0847   Day: 2   MJD: 50175.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2185 |   77   41   94 |   46   35   89 |   38   26   64 |
emr | emr 2281 |   50   30   75 |   41   28   62 |   27   15   43 |
esa | esa 2044 |  269  137  499 |  227  112  383 |  254  171  297 |
gfz | gfz 1152 |   48   33   87 |   51   32   74 |   22   19   44 |
igp | igp 2304 |   52   31   87 |   43   31   64 |   23   16   44 |
igs | igs 2304 |   53   28   82 |   41   28   64 |   23   15   40 |
jpl | jpl 2300 |   48   28   78 |   39   27   59 |   27   15   43 |

Table 5.0847.3   GPS week: 0847   Day: 3   MJD: 50176.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2242 |   47   35   98 |   59   56  138 |   36   26   64 |
emr | emr 2289 |   38   22   67 |   45   54  108 |   22   14   33 |
esa | esa 2065 |  236  149  466 |  231  117  365 |  258  159  266 |
gfz | gfz 1152 |   42   24   82 |   52   69  130 |   19   15   31 |
igp | igp 2259 |   42   27   78 |   46   57  113 |   28   21   51 |
igs | igs 2304 |   33   25   77 |   45   53  110 |   21   14   35 |
jpl | jpl 2302 |   34   24   73 |   44   53  106 |   19   14   34 |

Table 5.0847.4   GPS week: 0847   Day: 4   MJD: 50177.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2189 |   67   38  104 |   44   45  117 |   43   28   68 |
emr | emr 2250 |   49   32   90 |   32   28   93 |   27   14   37 |
esa | esa 2017 |  231  152  469 |  213   99  336 |  214  124  254 |
gfz | gfz 1152 |   51   28   88 |   36   38  112 |   27   15   43 |
igp | igp 2294 |   54   40  107 |   35   33   95 |   32   21   49 |
igs | igs 2304 |   47   32   91 |   33   31   94 |   27   15   38 |
jpl | jpl 2304 |   47   31   86 |   34   28   94 |   28   16   40 |

Table 5.0847.5   GPS week: 0847   Day: 5   MJD: 50178.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2250 |   57   37   96 |   44   33   97 |   44   27   68 |
emr | emr 2298 |   32   34   69 |   32   22   69 |   28   13   43 |
esa | esa 2012 |  260  130  441 |  177  111  329 |  212  121  238 |
gfz | gfz 1152 |   28   33   59 |   24   22   55 |   30   15   45 |
igp | igp 2302 |   34   36   69 |   31   25   72 |   33   18   53 |
igs | igs 2304 |   35   31   70 |   31   23   70 |   27   14   43 |
jpl | jpl 2300 |   34   32   63 |   33   20   68 |   32   15   48 |

Table 5.0847.6   GPS week: 0847   Day: 6   MJD: 50179.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2208 |   48   37   88 |   50   41  106 |   41   32   64 |
emr | emr 2295 |   34   27   56 |   32   31   80 |   28   15   42 |
esa | esa 1937 |  250  168  461 |  224  162  354 |  214  141  276 |
gfz | gfz 1152 |   35   24   46 |   28   22   60 |   27   18   44 |
igp | igp 2201 |   33   28   53 |   33   34   87 |   28   18   50 |
igs | igs 2304 |   40   27   63 |   33   33   84 |   27   18   42 |
jpl | jpl 2304 |   32   26   55 |   31   30   80 |   27   16   43 |

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