Subject: [IGSREPORT-3097] Wk 0875 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 28 Oct 1996 6:02:53 PST

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IGS Electronic Report    Mon Oct 28  6:02:53 PST 1996      Message Number 3097
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0875 IGS Final Orbits

Final IGS Orbit Combination - Week 0875   (Oct 13, 1996 - Oct 19, 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 (IGS08757.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 and their rates (xrt, yrt) are computed using a weighted average
of all available centres (weights are those from the orbit combination). 
Pole rate combination uses only centres providing estimated pole rates.
These values are supplemented with the current IERS Bulletin A UT1-UTC values. 

  The Final Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:

 IGS08750-6.SP3  IGS GPS ephemeris files for days 0-6, week 0875 in SP3 format.
 IGS08757.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08757.SUM    Complete report.

REMARKS on IGS Final 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. Rapid ("IGR") orbits/clocks are included in the combination for statistics
   only.

4. The following centre clock solutions, which provide broadcast clock
   corrections, were excluded from the combination but kept in the combination
   statistics:
            -> Centre: NGS 

5. Higher clock RMS for NGS on day 4 (Oct 17) was caused by clock jumps
   on PRN29.

6. Centre clock weights were determined using the following non-SA satellites:

                  Day | PRN list
                  ----+---------
                  0-6 |  15 28 

7. New clock offsets and drifts were estimated for centres showing reference
   clock resets.  Note that only the first clock offset and drift are output
   to the summary file.  However, the clock combination and the listed RMS
   include all the clock segments.  In summary, the following clock
   shifts/resets were noticed and accounted for:

                  Day | Centre |  Time  |  Jump
                  ----+--------+--------+-------------
                   3  |  EMR   | ~21:15 | ~ -641 ns
                   3  |  GFZ   | ~21:30 | ~ -640.3 ns

8. PRN31 was set unhealthy from day 0 (Oct 13) at 12:47 until day 1 (Oct 14)
   at 04:38 (Ref. NANU 177-96288). This explains the modeling problems 
   experienced on day 0 for that satellite.

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

                  Day | Centre | PRN list
                  ----+--------+---------------
                   0  |  COD   |  31 (see Remark #8)

10.The following table lists all maneuvered satellites for this week.
   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. These satellites were
   excluded from the long arc evaluation on these days due to unrealistic RMS
   caused by the maneuver. On day 3, both ESA and GFZ orbit solutions for PRN31
   were kept in the combination.

               PRN | Day |     Date    | Ref. NANU
               ----+-----+-------------+-----------
                31 | 2-3 |  Oct 15-16  | 178-96290

11.State vector resets were modeled for the following satellites to
   alleviate the effects of modeling problems, experienced by all centres,
   in the Long Arc (LA) process:

          Day (Date) |   TIME   |  PRN  | Centres  | Reason
         ------------+----------+-------+------------------------------
          1 (Oct 14) | 00:00:00 |  14   |   ALL    | Modeling problems
          4 (Oct 17) | 00:00:00 |  19   |   ALL    | Modeling problems
          4 (Oct 17) | 00:00:00 |  31   |   ALL    | Maneuver
          5 (Oct 18) | 00:00:00 |  18   |   ALL    | Modeling problems

12.Centre specific UT1-UTC values for 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 (IGS08757.SUM).

Table 1: Week 0875 summary.                       (Oct 13, 1996 - Oct 19, 1996)

Table 1.0875.a   GPS week: 0875   MJD: 50369.0-50375.0

         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  78 | .00  .02 -.01  -.25  -.15   .25  -.1  .21  .06 |    1.9   -1.8    1.3
        | .00  .00  .00   .12   .06   .12   .1           |    7.0   12.3
emr  29 | .00  .00  .00   .41  -.02   .10  -.1  .09  .08 |  353.1   23.9     .6
        | .00  .01  .01   .16   .07   .28   .1           |  313.7   11.1
esa  55 | .00  .00  .00   .01  -.10   .19   .1  .12  .09 |    5.5   16.1    1.1
        | .00  .01  .00   .13   .09   .14   .1           |   29.2   11.8
gfz  48 | .00 -.03  .00   .17   .03  -.28  -.2  .08  .07 |  354.6   23.9     .5
        | .00  .01  .01   .03   .05   .15   .1           |  313.6   11.0
igr  n/a| .00  .00  .00  -.09  -.09  -.09   .0  .10  .05 |    -.1     .1     .6
        | .00  .01  .00   .10   .11   .15   .1           |    2.0    4.3
jpl  37 | .01  .01  .00  -.09  -.10   .15   .2  .06  .06 |  255.2    6.3     .5
        | .01  .00  .00   .08   .05   .06   .0           |  386.3   40.4
ngs  48 | .00 -.05  .00   .61   .20  -.35   .1  .13  .13 |   -1.2    3.1  106.2
        | .00  .00  .01   .27   .19   .31   .1           |    7.7   14.9
sio  114| .00  .01  .02  -.48   .26  -.26   .1  .08  .07 |     .0     .0     .0
        | .01  .00  .00   .10   .07   .19   .1           |     .0     .0

Table 1.0875.b   GPS week : 0875   MJD: 50369.0-50375.0

         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   2   3   3 |
   2  |   2   3   3   3   3   3   3 |
   3  |   3   3   3   3   2   2   3 |
   4  |   3   3   3   3   3   3   2 |
   5  |   2   3   3   3   2   3   3 |
   6  |   3   2   3   3   2   3   3 |
   7  |   3   3   3   3   3   4   3 |
   9E |   6   3   3   4   4   4   3 |
  10  |   3   3   3   3   2   3   3 |
  14  |   5   7   2   2   2   2   2 |
  15  |   3   3   4   3   3   4   3 |
  16  |   3   3   3   2   2   2   2 |
  17  |   3   2   3   2   3   2   2 |
  18  |   8   5   3   3   3  10   4 | 
  19E |   4   6   5   4   5   4   4 |
  21  |   3   2   3   2   3   3   2 |
  22  |   3   3   3   3   3   3   3 |
  23  |   3   3   3   3   3   3   3 |
  24  |   3   2   3   3   3   2   2 |
  25E |   3   4   3   3   4   4   4 |
  26  |   3   3   3   3   3   2   3 |
  27E |   4   4   4   4   4   4   4 |
  28  |   3   3   3   2   3   2   3 |
  29  |   3   3   2   2   2   2   2 |
  30  |   5   5   5   5   5   4   5 |
  31  |  34   6   0  12   3   3   4 | See Remarks 8-9. Maneuver on days 2-3.

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 2.0875.0   GPS week: 0875   Day: 0   MJD: 50369.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02 -.01  -.09  -.11   .45  -.2  .55  .07 |    3.9   -9.8    1.4
emr  29 | .00  .00 -.01   .24  -.01   .15  -.3  .07  .07 |  574.9   20.6     .6
esa  53 | .00  .01  .00   .28  -.03   .06   .1  .22  .14 |  -39.1   18.1    1.1
gfz  50 | .00 -.03  .00   .13   .02  -.17  -.1  .08  .06 |  576.4   20.4     .5
igr  n/a| .01  .01  .01  -.05   .05  -.07   .2  .21  .06 |    2.9   -4.2     .5
jpl  37 | .00  .01  .00  -.14  -.09   .20   .2  .10  .08 |  576.4   20.2     .5
ngs  49 | .01 -.06  .01   .47   .05  -.26   .2  .13  .13 |     .4   -1.3   79.2
sio  110| .00  .02  .01  -.55   .13  -.34   .1  .08  .07 |     .0     .0     .0

Table 2.0875.1   GPS week: 0875   Day: 1   MJD: 50370.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02  .00  -.16  -.10   .25   .0  .08  .06 |  -13.0   24.1    1.2
emr  29 | .00 -.01 -.01   .51  -.11   .23  -.1  .07  .07 |  581.6   47.8     .5
esa  57 |-.01 -.01  .00  -.01  -.14   .07   .0  .11  .09 |  -18.6   39.0     .8
gfz  49 |-.01 -.03  .01   .14  -.02  -.23  -.1  .09  .08 |  583.2   47.6     .5
igr  n/a| .00  .00  .00  -.01  -.03   .01   .0  .06  .05 |   -3.2    6.4     .5
jpl  37 | .01  .01 -.01  -.06  -.03   .12   .2  .07  .07 |  583.0   47.6     .5
ngs  46 | .00 -.05  .00   .55  -.01   .20   .1  .14  .14 |   -7.4   17.7   79.8
sio  118|-.01  .02  .01  -.64   .31  -.52  -.1  .08  .07 |     .0     .0     .0

Table 2.0875.2   GPS week: 0875   Day: 2   MJD: 50371.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  78 | .00  .02 -.01  -.32  -.06   .15  -.1  .06  .06 |    7.7     .8    1.3
emr  29 |-.01  .00  .00   .43  -.01   .45  -.2  .08  .08 |  617.5   23.8     .6
esa  58 |-.01  .00  .00   .08  -.01   .06   .1  .06  .06 |    2.6   14.7    1.0
gfz  48 | .00 -.03  .00   .14   .01  -.32  -.2  .08  .08 |  619.0   24.1     .5
igr  n/a| .00  .01  .00  -.28  -.28  -.29   .0  .06  .06 |   -1.1    2.1     .6
jpl  37 | .01  .01  .00  -.10  -.20   .13   .2  .06  .06 |  619.0   23.5     .5
ngs  47 | .01 -.05  .01   .55   .10  -.80   .1  .15  .15 |    6.1   -3.5   76.1
sio  113|-.01  .01  .02  -.52   .35  -.22   .1  .08  .08 |     .0     .0     .0

Table 2.0875.3   GPS week: 0875   Day: 3   MJD: 50372.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  78 | .01  .02 -.01  -.18  -.16   .10  -.1  .06  .05 |    5.0   -6.0    1.3
emr  28 | .00 -.01  .00   .63   .07   .19   .1  .09  .09 |  641.2   13.7     .5
esa  53 | .00  .00  .01  -.10  -.01   .17   .0  .09  .08 |   42.6    3.9    1.0
gfz  49 | .00 -.03 -.01   .22  -.03  -.26  -.2  .07  .07 |  642.5   14.1     .4
igr  n/a| .00 -.01  .00  -.06  -.15  -.21  -.2  .05  .04 |     .2     .4     .5
jpl  37 | .00  .01  .00  -.14  -.11   .24   .2  .04  .04 |  355.5   -7.6     .5
ngs  49 | .00 -.06 -.02   .42   .10  -.49   .0  .12  .12 |    6.8  -11.1   76.0
sio  113| .00  .02  .02  -.44   .23  -.23   .0  .07  .07 |     .0     .0     .0

Table 2.0875.4   GPS week: 0875   Day: 4   MJD: 50373.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .02 -.02  -.32  -.24   .33  -.2  .06  .05 |    5.1  -12.1    1.2
emr  29 | .00 -.01  .00   .54   .01  -.13  -.2  .10  .09 |   -2.3   22.1     .6
esa  55 | .00  .01  .00  -.07  -.25   .25   .2  .10  .08 |   38.5    3.3    1.4
gfz  48 |-.01 -.03  .00   .20   .04  -.53  -.1  .08  .07 |    -.6   22.1     .5
igr  n/a| .00 -.01  .00  -.01  -.12  -.19  -.2  .05  .04 |     .7   -3.7     .8
jpl  37 | .00  .01  .00   .09  -.07   .13   .3  .05  .05 | -409.3  -77.7     .5
ngs  49 | .00 -.05 -.01   .39   .53  -.47   .1  .13  .13 |  -15.1   30.0  205.3
sio  118| .00  .01  .02  -.39   .31   .07   .0  .07  .06 |     .0     .0     .0

Table 2.0875.5   GPS week: 0875   Day: 5   MJD: 50374.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .01 -.01  -.22  -.20   .21  -.2  .06  .05 |    -.4   -1.2    1.4
emr  28 |-.01 -.01 -.01   .20   .01  -.42  -.2  .11  .10 |   21.3   17.5     .6
esa  55 |-.01  .00  .01  -.06  -.13   .35   .2  .09  .07 |   12.4   16.4    1.1
gfz  48 | .01 -.02 -.01   .19   .12  -.07  -.1  .09  .06 |   23.0   17.1     .5
igr  n/a| .01  .00  .00  -.12   .00   .16   .0  .06  .05 |   -1.4    3.8     .6
jpl  37 | .00  .01  .01  -.14  -.08   .17   .2  .07  .07 |   22.8   16.9     .5
ngs  50 | .00 -.05 -.01  1.18   .27  -.21   .1  .15  .15 |     .5   -5.7   78.3
sio  117| .00  .01  .02  -.44   .22  -.38   .2  .09  .07 |     .0     .0     .0

Table 2.0875.6   GPS week: 0875   Day: 6   MJD: 50375.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .03 -.02  -.43  -.15   .25  -.1  .06  .05 |    5.3   -8.7    1.4
emr  28 |-.01  .00 -.01   .33  -.11   .22   .1  .09  .09 |   37.2   21.9     .6
esa  55 |-.01  .00  .00  -.02  -.12   .41   .1  .10  .08 |     .1   17.2    1.1
gfz  45 | .00 -.03  .00   .18   .05  -.39  -.2  .07  .06 |   39.0   21.7     .5
igr  n/a| .01 -.01  .00  -.12  -.12  -.02  -.1  .05  .04 |    1.5   -4.0     .6
jpl  37 | .01  .01  .00  -.12  -.13   .07   .2  .05  .05 |   38.8   21.5     .5
ngs  48 | .00 -.06 -.01   .72   .32  -.39  -.2  .11  .11 |     .6   -4.3   80.4
sio  109|-.01  .01  .02  -.36   .25  -.17   .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 for all satellites.
         "NE" stands for long arc orbit RMS for Non-Eclipsing satellites only.
         "MEDI","MD" stands for median of the centre's satellite RMS.

         Units: cm.

Table 3.0875.0   GPS week: 0875   Day: 0   MJD: 50369.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   7   4  15   7   5   7   7   6    3 |    7  11  10  13  12   6  16   9    9
   2  |   5   5   7   5   4   4   9   8    2 |    7   7   6   8   7   5  11   8    6
   3  |   5   6   7   4   4   6  13   7    3 |    7  11  12  10   7   7  13  10    8
   4  |   8   5   6   5   5   5   9   7    3 |    4   7   6   7   5   5  12   7    4
   5  |   5   5  10   5   3   5   9   6    2 |    6   8  11  10   8   5  10   8    7
   6  |   6   7   5   5   6   5  11   6    3 |    7  11   9  12   9   5  15  12    8
   7  |   8   5   5   7   5   5  11   7    3 |    7   9   8  13   8   4  17   8    7
   9  |  33   7  20   9   9   7  16   8    6 |   14  10  19  15  13   7  18  10   10
  10  |   6   7   8   6   9 ---  10   6    3 |    8  10  10  11   9 ---  13   9    8
  14  |  23  10  25   7   7   8  12   7    5 |    2   3   3   0   1   1   2   2    1
  15  |   6   5  14   5   3   8  10   7    3 |    6   8   9   8   6   5  11   6    5
  16  |   4   5   9   7   4   6  12   8    3 |    8  10  11   9   9   8  14  11    8
  17  |   8   6   6   6   7   3  16   8    3 |    5   9   5   8  11   6  12   7    5
  18  |  19  19  14  26   7  17  26  15    8 |   48  46  48  68  57  58  68  47   53
  19E |   8   9  15  10  10  10  16  11    4 |   11  16  13  20  18  12  24  14   12
  21  |   9   6   8   6   3   5   9   6    3 |   10  11   9  10  10  10  14   8    9
  22  |   5   6   7   6   5   5  13   6    3 |    6   8   9   8   7   6  13   8    6
  23  |   9   7   7   5   5   7  13   5    3 |   15   8  10   7  10  10  11  11    9
  24  |   6   6   4   6   7   5   9   8    3 |    3   7   6   7   6   5  13   7    4
  25E |   7   6   6  10   4   8  11   5    3 |    5  11   9  15  11   5  21   7    8
  26  |   7   4   8   7  11   5   9   7    3 |    7   9  10  10  12   8  14  11    8
  27E |   6   6  18   6   4   6  18   8    4 |   13  12  12  15  13  14  22  16   13
  28  |   5   5   6   5   7   5  16   6    3 |    7  10   9  10   9   5  16   9    7
  29  |   7   5  10   6   3   4  11   8    3 |    7  11   8  15   9   8  12  14    9
  30  |   9  12  13   7   4 ---  18   8    5 |   22  25  25  26  25 ---  30  20   23
  31  | 273 ---  95 --- 104  34 ---  16   34 |  125 ---  21 ---  21  73 ---  59   51
------|--------------------------------------|--------------------------------------
 RMS  |  55   7  22   8  21  10  13   8      |T  27  14  14  18  15  20  20  17   16
 WRMS |   7   7  14   6   6   8  13   7      |NE 29  14  15  18  15  21  20  18   17
 MEDI |   7   6   8   6   5   6  11   7      |MD  7  10  10  10   9   6  14   9    8

Table 3.0875.1   GPS week: 0875   Day: 1   MJD: 50370.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   6   5   8   9   5   5  11   5    3 |    5   9   6  10   7   5  13   8    5
   2  |   6   6   6   7   4   4  11   8    3 |    5   6   6   8   5   4  12   7    3
   3  |   5   6   9   9   4   6  11   6    3 |    6  10  12  11   9   7  15   6    6
   4  |   6   6   6   6   7   5  12   8    3 |    5   7   7   6   9   4  12   5    3
   5  |   4   5   9   7   4   6  16   8    3 |    5   9  12  11   8   5  16  11    7
   6  |   5   7   5   4   6   4  13   5    2 |    4   9   9  12   8   4  15   6    6
   7  |   5   8  11  10   8   5  10   6    3 |    4   9   6  13  10   4  11   6    4
   9E |   5   9   9   6   5   5  11   8    3 |   11  14  19  15  10   9  18  11   10
  10  |   6   5   9   7   7 ---  10   5    3 |    4   8   7   8   7 ---  10   7    5
  14  |  18  12  15  15  13  20  30  14    7 |   27  18  18  17  19  30  15  24   19
  15  |   5   7  11  12   5   7  12   8    3 |    5  10  10  16   7   5  14  10    6
  16  |   4   5   9   9   4   3  12   7    3 |    5   6   9   8   6   5  12   6    4
  17  |   4   6   7   5   4   4   8   5    2 |    4   9   5   9   9   6  13   7    6
  18  |  23   7  12   7   4   7  11   8    5 |   21  31  28  34  30  28  34  34   29
  19E |  12  10  27  15  12   8  17  11    6 |   22  24  19  28  23  22  24  25   20
  21  |   5   5   6   8   4   4   8   6    2 |    5   5   6   9   6   6  10   6    4
  22  |   6   7   7   8   3   5  13   6    3 |    4   9   8   9   4   6  15   7    4
  23  |   8   7   4   8   3   5  14   5    3 |    7   6   6   7   6   6  12   7    5
  24  |   3   5   9   6  10   4  10   7    2 |    3   7   7   6   8   4  12   6    4
  25E |   7  10   7   8   4   7  16   8    4 |    6  10  11  11   9   4  22   6    7
  26  |   6   6   6   8   7   5  16   5    3 |    5   7  13  11   7   4  13   9    6
  27E |   7   7  15   9   5   5  16   9    4 |    8  15  14  14  13  10  20   8   11
  28  |   5   5   7   6   3   7  16   5    3 |    4   7  10  12   7   7  16   6    5
  29  |   4   4  11   8   4   6   9   7    3 |    5   9  10  13   7   8  12  11    7
  30  |   7  10  10  10   4 ---  23  10    5 |   13  17  18  19  16 ---  24  13   14
  31  |   8   8  24 ---   9   7 ---  13    6 |   77   4  19 ---  14  47 ---  44   34
------|--------------------------------------|--------------------------------------
 RMS  |   8   7  11   9   6   7  14   8      |T  17  12  12  14  11  14  16  14   11
 WRMS |   6   7   9   8   5   7  14   7      |NE 18  11  11  13  11  14  15  14   11
 MEDI |   6   7   9   8   5   5  12   7      |MD  5   9  10  11   8   6  14   7    6

Table 3.0875.2   GPS week: 0875   Day: 2   MJD: 50371.0

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

Table 3.0875.3   GPS week: 0875   Day: 3   MJD: 50372.0

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

Table 3.0875.4   GPS week: 0875   Day: 4   MJD: 50373.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   6   5   8   6   6   3   9   6    2 |    4   9   6  11  10   8  13   9    6
   2  |   6  12  11   8   4   4  13   9    3 |    4  10   6  10   8   3  11  11    5
   3  |   5   5   7   5   3   3   9   6    2 |    3   8   9  10   8   5  16   7    5
   4  |   4   7   5   5   4   4  13   7    3 |    3   8   8   6   5   4  15   8    4
   5  |   4   8   8   5   5   4   6   4    2 |    5  10  13   9   9   6  11   9    6
   6  |   4   8   5   7   5   4  11   6    2 |    3  10   7  12  10   4  15   8    6
   7  |   7  12  13   6   5   4   9   7    3 |    4  14   5  10   8   4  11   6    5
   9E |   6  16  15   9   6   5  16   7    4 |    8  14  13  17  11   9  18   8    8
  10  |   3   7   5   4   4 ---   9   5    2 |    5  10   8   7   8 ---   9  11    6
  14  |   5   9   5   4   5   3  10   7    2 |    5   9   7   6   6   5   9  10    4
  15  |   5   7   7   9   6   6  13   5    3 |    4   8   7  12  12   4  14   9    5
  16  |   4   6  10   5   4   4   8   8    2 |    4   6  10   8   8   6  11  11    5
  17  |   3   7  10   6   4   3  14   6    3 |    4   8   6   8   7   4  11   8    4
  18  |   9  13  13   8   4   2  14   4    3 |   16  19  20  22  21  20  21  18   19
  19E |  11  13  22  15   6   8  23   7    5 |   27  35  18  37  27  33  37  32   30
  21  |   6   7   8   8   2   4  11   4    3 |    4   8   6  10   6   6  10   9    5
  22  |   3   6  10   4   4   5  13   7    3 |    3   8   8   7   5   6  14   8    4
  23  |   8  10   9   8   4   4  14   7    3 |   10   8   6   5   6   6   9  13    6
  24  |   4   9   8   5   9   7  11   7    3 |    2   9   7   8   6   5  13   8    4
  25E |   8  11   9  10   5   6  16   7    4 |    5  11   9  17  12   8  24   9    9
  26  |   4   5   8   7   6   5  11   6    3 |    4   8   9  11  11   6  14   9    6
  27E |   5  16  14  13   2   5  12   8    4 |    6  12  17  12   8   7  14   8    7
  28  |   5   6   6   7   4   3  12   6    3 |    3   7   9  12   8   7  17   4    6
  29  |   3   8   6   5   3   3   8   6    2 |    4  10   5   9   7   5  13  12    6
  30  |   8  15   7  11   5 ---  14   7    5 |   14  20  17  21  17 ---  25  17   16
  31  |   7  12  10   7   5   4  15   6    3 |    4  11   9  11   8   3  14   6    5
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  10   8   5   5  13   7      |T   8  12  10  13  10   9  16  11    9
 WRMS |   5   9   8   7   4   5  13   6      |NE  6  10   9  11   9   6  13  10    7
 MEDI |   5   8   8   7   5   4  12   7      |MD  4  10   8  10   8   6  14   9    6

Table 3.0875.5   GPS week: 0875   Day: 5   MJD: 50374.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   5  11   5   6   8   3  18   7    3 |    3  13   5  10   7   6  19   5    6
   2  |   4   8   9   7   7   5  13   7    3 |    4   8   5  10   7   4  14   8    5
   3  |   5   7   6   6   3   5   8   5    2 |    4   8  10   9   6   6  13   5    5
   4  |   4  10   5   7   5   3  16   8    3 |    2   9   6   8   8   3  19   6    4
   5  |   4   5   7   6   3   4  14   7    3 |    5  11   9  10   9   7  11  10    7
   6  |   5  11   4   8   4   4  10   7    3 |    4  11   9  12   7   4  11   8    5
   7  |   7   9  15   7   5   4  17   6    4 |    4   9   7  11   6   4  16   7    4
   9E |   6  15  11   9   4   6  14   7    4 |   10  12  17  20  13   6  24  11   11
  10  |   5   4   5   8   5 ---  10   7    3 |    5   8   6   7   7 ---  12   9    5
  14  |   5   7   8   4   4   3  10   6    2 |    4  11  10   7   7   5  10   8    6
  15  |   3  11  11  12   3   7  14   7    4 |    3  12   6  12   6   4  12   5    5
  16  |   3   4   7   5   9   5   9   7    2 |    3   7   7   9  12   7  11   9    6
  17  |   4   5   7   6   4   4  10   5    2 |    4   8   5   9   7   4  11   5    4
  18  |  16  25  24  29  12  21  35  27   10 |   46  33  33  54  42  48  52  44   41
  19E |   8  16   9  11  14   8  12  10    4 |   22  22  19  28  23  24  23  25   22
  21  |   4   6   6   8   5   3  15   7    3 |    5   9   8  11   9   6  12   6    6
  22  |   6   7   8   6   6   7  21   7    3 |    3   9   7  10   5   4  16   5    3
  23  |   8   7   9   7   4   6  11   5    3 |   10   7   6   7   9   5   8   6    6
  24  |   4   5   5   4   9   4  13   8    2 |    2   8   6   7   8   5  17   7    5
  25E |   8  13   6  13   7   7  18  11    4 |    5  15   8  15  10   7  27   6   10
  26  |   4   6   4   7   5   4  13   6    2 |    5  10  10  12   9   7  16   7    7
  27E |   5  16  11  10   4   6  17  10    4 |    4  13  14  11   8   7  22  11    7
  28  |   5   5   5   6   4   4  13   6    2 |    4   8   8  10   5   5  14   4    4
  29  |   5   9   7   5   4   2  10   8    2 |    4  12   7   9   7   7  15   8    7
  30  |   6  15  10   8   4 ---  12   9    4 |   13  17  15  19  15 ---  22  12   14
  31  |   6  17   7   5   6   6  11   7    3 |    3  19   8  10   4   4  15   5    6
------|--------------------------------------|--------------------------------------
 RMS  |   6  11   9   9   6   7  15   9      |T  11  13  11  16  12  12  18  12   11
 WRMS |   5  10   7   6   5   7  15   7      |NE 11  12  10  15  11  11  17  11   10
 MEDI |   5   9   7   7   5   5  13   7      |MD  4  11   8  10   8   6  15   7    6

Table 3.0875.6   GPS week: 0875   Day: 6   MJD: 50375.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   5   8   8   7   3   4  10   8    3 |    3   9   6   8   8   7  15   5    7
   2  |   4   8  10   5   3   5   9   6    3 |    5   9   7   9   8   5  12   6    6
   3  |   7   8   4   5   3   4   7   8    3 |    7  11   7   9  10   6  13   4    8
   4  |   5   7   7   5   4   4  10   7    2 |    3   9   8   7   6   4  12   5    5
   5  |   3   6  11   6   5   5   8   8    3 |    5   9   8   9   9   5  13   8    8
   6  |   5   7  14   8   4   5   7   6    3 |    5  11   7  14  11   4  14   8   10
   7  |   4   7  13   7   4   4   9   7    3 |    5   9   6   9   9   4  14   6    8
   9E |   5  12   6   8   6   6  14   8    3 |   11  15  18  21  14  11  22  13   14
  10  |   5   8   6   5   6 ---   9   6    3 |    6  10   8   8   8 ---  13   6    8
  14  |   6   6   7   6   3   4   8   7    2 |    8   7   8   8   7   7   8   8    5
  15  |   6  11   9   6   4   6  11   9    3 |    3  10   5   9   7   4  13   5    6
  16  |   3   5   5   6   3   5   5   8    2 |    6   7  10   8   9   8   9   8    6
  17  |   4  10   8   6   8   4   7   6    2 |    4   9   7   9   9   6  11   6    6
  18  |   7   8  21  10   6   5  10   6    4 |   38  29  31  44  37  41  43  38   38
  19E |  12  12  11   7   4   6  16   6    4 |   20  29  18  25  22  19  28  16   21
  21  |   5   5   4   7   4   4   9   7    2 |    8   8   7  11  10   8  15   9    8
  22  |   5   8   6   5   3   4  12   7    3 |    4  10   6   7   8   5  13   5    6
  23  |  10   9   5   7   5   4  12   6    3 |   15   8   6   8   9   9   7   8    9
  24  |   3   4   5   6   8   3   9   7    2 |    3   7   6   7   8   5  12   5    6
  25E |   8  12  10   9   6   6  14  14    4 |    6  12  12  15  11   7  21   7    9
  26  |   6  12   3   6   3   5  11   7    3 |    6  10   6   8   8   6  13   7    7
  27E |   6  11   7   7   8   6  18  10    4 |    5  11   9  11  10   7  17   9    8
  28  |   7   5  10   6   2   4  12   8    3 |    6  10   8   9   9   5  16   4    8
  29  |   4   7   8   5   3   4   5   5    2 |    4   8   6  10   8   6  11   8    6
  30  |   9  15  18   8   5 ---  13  11    5 |   20  25  20  24  22 ---  30  18   21
  31  |   7  15  10   8   4   9  13   9    4 |    4  16  11  11   8   6  15   4    7
------|--------------------------------------|--------------------------------------
 RMS  |   6   9  10   7   5   5  11   8      |T  11  13  11  14  12  11  17  11   11
 WRMS |   5   9   8   6   4   5  11   8      |NE 10  12  10  13  12  10  16  10   11
 MEDI |   5   8   8   6   4   5  10   7      |MD  6  10   8   9   9   6  13   7    8

Table 4: Precise Navigation Summary.

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

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

Table 4.0875   GPS week: 0875   MJD: 50369.0-50375.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2458 |U  56   33  107 |U  35   31   80 |   36   24   61 |
emr | emr 2406 |   50   28  101 |   29   23   66 |U  30   16   51 |
esa | esa 1744 |   49   29  103 |U  43   26   79 |   33   27   58 |
gfz | gfz 1213 |   45   29  119 |U  25   24   57 |   26   15   48 |
igr | igr 2454 |   50   29  102 |   27   23   66 |   31   15   51 |
igs | igs 2474 |   49   27  100 |   27   23   64 |   29   16   51 |
jpl | jpl 2248 |U  94   37  114 |U  29   25   60 |   30   17   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 5.0875.0   GPS week: 0875   Day: 0   MJD: 50369.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2452 |   47   28   82 |   43   31   88 |   33   24   54 |
emr | emr 2398 |   43   21   57 |   32   22   68 |   26   17   38 |
esa | esa 1739 |   39   23   63 |   26   28   78 |   31   20   48 |
gfz | gfz 1195 |   45   23   67 |   22   23   50 |   33   22   44 |
igr | igr 2452 |   41   23   68 |   24   21   65 |   26   15   41 |
igs | igs 2452 |   40   22   66 |   25   21   67 |   26   15   42 |
jpl | jpl 2256 |   46   23   74 |   34   25   61 |   23   15   43 |

Table 5.0875.1   GPS week: 0875   Day: 1   MJD: 50370.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2468 |    0    0    0 |   32   27   87 |   27   21   56 |
emr | emr 2476 |    0    0    0 |   26   23   68 |   23    9   38 |
esa | esa 1721 |    0    0    0 |   26   20   60 |   24   18   40 |
gfz | gfz 1190 |    0    0    0 |   24   19   52 |   25   12   37 |
igr | igr 2480 |    0    0    0 |   25   21   68 |   24   10   38 |
igs | igs 2481 |    0    0    0 |   24   21   68 |   22   12   41 |
jpl | jpl 2279 |    0    0    0 |   26   23   62 |   25   13   38 |

Table 5.0875.2   GPS week: 0875   Day: 2   MJD: 50371.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   74   43  187 |   30   32   72 |   36   20   57 |
emr | emr 2396 |   73   42  186 |   21   20   51 |   27   13   39 |
esa | esa 1710 |   65   38  180 |   26   22   52 |   30   17   45 |
gfz | gfz 1188 |   54   46  243 |   19   24   49 |   31   14   45 |
igr | igr 2384 |   75   45  187 |   21   24   56 |   28   13   45 |
igs | igs 2434 |   68   39  181 |   19   22   50 |   25   12   43 |
jpl | jpl 2191 |  202   70  223 |   21   24   53 |   28   12   39 |

Table 5.0875.3   GPS week: 0875   Day: 3   MJD: 50372.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   56   33   84 |   28   27   61 |   36   27   62 |
emr | emr 2253 |   50   26   76 |   23   19   49 |   33   22   56 |
esa | esa 1944 |   51   27   84 |   24   21   46 |   38   22   57 |
gfz | gfz 1213 |   47   27   76 |   23   20   52 |   23   17   53 |
igr | igr 2388 |   51   24   78 |   22   20   43 |   34   18   51 |
igs | igs 2461 |   49   27   81 |   21   17   44 |   31   16   52 |
jpl | jpl 2192 |   49   28   70 |   27   21   46 |   30   21   45 |

Table 5.0875.4   GPS week: 0875   Day: 4   MJD: 50373.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   53   28   85 |   44   33   85 |   38   24   67 |
emr | emr 2492 |   49   25   80 |   40   27   77 |   28   15   56 |
esa | esa 1811 |   47   28   87 |   40   30   86 |   36   19   57 |
gfz | gfz 1238 |   38   24   73 |   33   33   83 |   21   14   57 |
igr | igr 2486 |   48   25   79 |   41   28   74 |   32   15   56 |
igs | igs 2496 |   48   24   77 |   38   28   74 |   28   16   56 |
jpl | jpl 2288 |   59   24   84 |   40   32   79 |   25   16   40 |

Table 5.0875.5   GPS week: 0875   Day: 5   MJD: 50374.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2496 |   44   35   85 |   31   34   94 |   47   28   74 |
emr | emr 2395 |   36   27   80 |   28   25   87 |   43   22   74 |
esa | esa 1692 |   42   32   87 |   28   25   86 |   37   23   51 |
gfz | gfz 1236 |   42   27   81 |   20   24   56 |   28   15   51 |
igr | igr 2495 |   36   27   74 |   25   25   94 |   44   21   75 |
igs | igs 2496 |   37   27   75 |   24   26   84 |   43   21   72 |
jpl | jpl 2287 |   47   28   81 |   24   26   62 |   40   23   72 |

Table 5.0875.6   GPS week: 0875   Day: 6   MJD: 50375.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2495 |   54   28   78 |   35   33   71 |   31   21   51 |
emr | emr 2435 |   42   23   68 |   32   24   56 |   22   13   43 |
esa | esa 1589 |   44   21   70 |   89   30  119 |   32   51   90 |
gfz | gfz 1233 |   45   20   66 |   28   19   48 |   22   12   42 |
igr | igr 2491 |   42   21   71 |   27   21   51 |   24   11   42 |
igs | igs 2495 |   44   21   69 |   32   24   55 |   23   17   45 |
jpl | jpl 2243 |   48   22   70 |   30   24   49 |   35   16   36 |

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