Subject: [IGSREPORT-3947] Wk 0912 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Wed, 16 Jul 1997 11:26:31 PDT

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IGS Electronic Report    Wed Jul 16 11:26:31 PDT 1997      Message Number 3947
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0912 IGS Final Orbits

Final IGS Orbit Combination - Week 0912   (Jun 29, 1997 - Jul 05, 1997)

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 (IGS09127.SUM).

SOFTWARE:

  The weighted average software used was originally developed by T. Springer
and G. Beutler in 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 G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS 
   Analysis Centers, Bulletin Geodesique, 69, pp 200-222.

   Kouba J., Mireault Y. and F. Lahaye, 1995, 1994 IGS Orbit/Clock Combination
   and Evaluation, Appendix I of the Analysis Coordinator Report, International
   GPS Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.

   Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report, 
   International GPS Service for Geodynamics (IGS) 1995 Annual Report, 
   pp. 45-76.

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.

  Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
Final IGS solutions.  AC LOD biases with respect to Bulletin A are estimated
using Bulletin A most recent 3 weeks (21 days), i.e. up to 5 days prior to
the last non-predicted day of Bulletin A.  AC LOD biases are removed and the
new AC bias-free LODs are used to compute a weighted IGS LOD which in turn
is used to integrate UT1-UTC. The starting UT1-UTC value is chosen as
Bulletin A fifth day prior to its last non-predicted day. Both IGS LOD and 
UT1-UTC values are printed in the IGS Final erp file.

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

 IGS09120-6.SP3  IGS GPS ephemeris files for days 0-6, week 0912 in SP3 format.
 IGS09127.ERP    Earth Rotation Parameters (ERP) and their rates as well as
                 Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                 with IGS ephemerides.
 IGS09127.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. Centre clock weights were determined using the following non-SA satellites:

                  Day | PRN list
                  ----+---------
                  0-1 |  15 
                  2   |  all (a)
                  3-6 |  15 

  (a) Since PRN 15 was maneuvered on day two, no centre except ESA submitted
      a solution for that satellite.  It was therefore not possible to align
      all clocks using PRN 15, the only non-SA satellite.  We used a different
      strategy where a chosen reference centre (in this case COD) is aligned to
      broadcast GPS clocks using all satellites and then all other centres are
      aligned to the reference centre.  The clock weights are given by the
      latter alignment and the reference centre is given the smallest weight
      computed.

6. The following clock solutions were excluded from the combination because
   they were biasing the combined clock solutions (large clock shifts/outliers)
   but were kept for the RMS computation. Note that starting with week 860, 
   Centres with clock RMS higher than 2 ns are excluded from the clock 
   combination if they bias the combined clock solution. This will make IGS 
   clock precision more comparable to the best ACs.

                  Day | Centre | PRN list
                  ----+--------+---------------
                   2  |  EMR   |  ALL

7. 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.

               PRN | Day |    Date    | Ref. NANU
               ----+-----+------------+-----------
                15 |  2  | 1997_07_01 | 079-97182
                10 |  3  | 1997_07_02 | 080-97183

8. 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
         ------------+----------+-------+----------+-------------------
          2 (Jul 01) | 00:00:00 |  15   |   ALL    | Maneuver
          3 (Jul 02) | 00:00:00 |  10   |   ALL    | Maneuver
          3 (Jul 02) | 00:00:00 |  23   |   ALL    | Modeling problems
          6 (Jul 05) | 00:00:00 |  14   |   ALL    | Modeling problems

9. 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 (IGS09127.SUM).

Table 1: Week 0912 summary.                       (Jun 29, 1997 - Jul 05, 1997)

Table 1.0912.a   GPS week: 0912   MJD: 50628.0-50634.0

         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  79 | .00  .01 -.01  -.26   .01   .12  -.2  .06  .04 |    1.3    3.6     .4
        | .00  .00  .00   .12   .06   .09   .1           |    7.9   12.5
emr  30 | .00 -.01  .00   .18   .31   .70   .0  .11  .11 |  172.6   58.8   44.6
        | .00  .01  .01   .07   .09   .20   .2           |  130.3   45.5
esa  53 | .00  .00  .00  -.08  -.08   .02   .1  .06  .06 |   11.5  -59.0    1.3
        | .00  .00  .01   .08   .06   .18   .1           |   16.9    9.9
gfz  49 | .00  .00  .01   .22   .01  -.12  -.1  .05  .05 |  218.7   83.2     .4
        | .00  .00  .01   .08   .08   .10   .1           |  178.9   10.6
igr  n/a| .01 -.02  .00  -.06   .14   .04   .0  .05  .04 |     .2     .9     .5
        | .00  .01  .00   .15   .13   .24   .1           |    1.1    2.0
jpl  36 | .00  .01  .00  -.04  -.10   .00   .1  .05  .05 |  743.0   71.7     .4
        | .00  .01  .00   .07   .06   .15   .1           | 1289.4   35.7
ngs  50 | .00 -.06  .00   .14   .41   .23  -.4  .18  .18 |    1.9    -.9   80.5
        | .01  .01  .02   .29   .26   .18   .2           |    7.3   11.3
sio  107| .00  .01 -.01   .04  -.02  -.62   .0  .08  .07 |     .0     .0     .0
        | .01  .01  .01   .04   .09   .22   .2           |     .0     .0

Table 1.0912.b   GPS week : 0912   MJD: 50628.0-50634.0

         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  |   2   3   3   3   3   4   3 |
   2  |   2   3   2   3   3   2   2 |
   3  |   2   2   3   2   2   2   3 |
   4  |   3   3   3   3   3   3   3 |
   5  |   3   4   3   2   3   2   2 |
   6  |   3   3   3   3   3   3   3 |
   7  |   2   2   2   2   3   3   3 |
   9  |   2   2   3   2   4   3   3 |
  10E |   3   3   4   0   5   3   3 | Maneuver on day 3.
  14E |   3   2   3   2   2   3  22 | Modeling problem on day 6.
  15  |   2   2   0   3   2   3   3 | Maneuver on day 2.
  16E |   4   2   3   3   3   3   3 |
  17  |   2   2   2   2   2   2   3 |
  18  |   3   2   3   3   3   2   2 |
  19  |   2   2   2   3   3   2   3 |
  21E |   4   3   4   4   4   4   5 |
  22  |   3   3   2   2   3   2   2 |
  23E |   4   4   5   5   5   5   4 |
  24  |   3   2   2   3   3   2   2 |
  25  |   2   2   2   2   2   2   2 |
  26  |   3   3   2   3   3   2   3 |
  27  |   2   2   2   3   2   2   3 |
  29  |   2   3   2   2   2   3   3 |
  30  |   3   2   3   2   3   2   3 |
  31  |   2   2   3   2   2   3   3 |

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

Table 2.0912.0   GPS week: 0912   Day: 0   MJD: 50628.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .00 -.01  -.02  -.03   .19  -.1  .04  .04 |    8.3   -4.1     .4
emr  31 | .00 -.01 -.01   .24   .27   .46  -.1  .09  .09 |   62.1   -9.4     .5
esa  53 | .00  .00  .01  -.10  -.03   .15   .1  .06  .06 |   30.8  -59.3    1.5
gfz  50 | .00  .00  .01   .12   .01  -.30  -.1  .06  .06 |  -22.1   71.9     .5
igr  n/a| .00 -.03  .01  -.19   .24  -.19   .1  .05  .05 |    -.1     .0     .6
jpl  37 | .00  .00  .01  -.04  -.14  -.12   .3  .04  .04 | 3648.9   -6.5     .5
ngs  52 | .00 -.05 -.01  -.42   .44   .18  -.3  .17  .16 |    5.3  -10.7   80.2
sio  107|-.01  .02 -.01  -.05  -.10  -.39  -.3  .09  .08 |     .0     .0     .0

Table 2.0912.1   GPS week: 0912   Day: 1   MJD: 50629.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .00 -.01  -.23  -.09   .26  -.2  .04  .04 |  -10.6   15.9     .5
emr  30 | .00 -.02  .00   .27   .33   .77   .2  .10  .10 |   48.8   87.1     .5
esa  54 | .01  .00  .00  -.02  -.02  -.23   .1  .06  .06 |   -4.9  -53.3    1.8
gfz  50 | .00  .00  .00   .13  -.03  -.19  -.1  .05  .05 |   49.8   88.3     .5
igr  n/a| .00 -.02  .00  -.18   .18   .40   .1  .04  .04 |     .0     .0     .5
jpl  37 | .00  .01  .00  -.03  -.06   .22   .1  .04  .04 |   50.0   87.4     .5
ngs  50 | .00 -.06  .01   .17   .71   .35  -.4  .18  .17 |   -7.3   10.5   79.8
sio  108| .00  .01 -.01   .06  -.10 -1.05  -.1  .08  .06 |     .0     .0     .0

Table 2.0912.2   GPS week: 0912   Day: 2   MJD: 50630.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .00 -.01  -.31   .01   .10  -.1  .04  .04 |   -2.8    8.8     .4
emr  30 | .00 -.01  .00   .12   .43   .58   .1  .10  .10 |  134.7   83.7  117.9
esa  55 | .01  .01  .00  -.17  -.17  -.10   .1  .06  .06 |  -12.0  -55.3    1.1
gfz  52 | .00  .00  .01   .29  -.14  -.03   .1  .06  .06 |  132.0   88.5     .3
igr  n/a| .01 -.01  .00  -.13  -.10  -.32   .0  .04  .04 |     .3    -.4     .3
jpl  36 | .00  .01  .00   .11  -.03   .05   .2  .04  .04 |  131.9   88.4     .1
ngs  48 |-.01 -.07  .01   .17   .77   .22  -.7  .18  .18 |   10.0   -8.5   82.4
sio  105|-.01  .00  .00   .06   .01  -.46  -.1  .07  .06 |     .0     .0     .0

Table 2.0912.3   GPS week: 0912   Day: 3   MJD: 50631.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .01  .00  -.39   .11   .13  -.2  .05  .05 |   -3.4   19.4     .4
emr  30 | .00 -.01 -.01   .24   .32   .94  -.2  .11  .11 |  210.7  101.7     .4
esa  53 | .01  .00  .00   .04  -.15  -.10   .2  .05  .06 |   14.3  -42.0     .8
gfz  50 | .00  .00  .01   .17   .07  -.14  -.1  .05  .05 |  212.1  102.5     .4
igr  n/a| .01 -.02  .00   .10   .22   .26  -.1  .05  .05 |     .6    -.9     .4
jpl  36 | .00  .00  .01  -.04  -.07   .06   .1  .03  .03 |  212.0  102.1     .4
ngs  50 | .02 -.05  .00   .24   .32   .55  -.3  .19  .20 |   -6.5   16.8   80.5
sio  110| .01  .01 -.02   .07  -.07  -.57   .0  .07  .06 |     .0     .0     .0

Table 2.0912.4   GPS week: 0912   Day: 4   MJD: 50632.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  78 | .00  .01 -.01  -.22   .02  -.04   .0  .06  .05 |    3.6    4.9     .4
emr  30 | .01 -.02  .01   .16   .40   .60  -.1  .11  .10 |  305.7   77.9     .4
esa  53 | .01  .00  .00  -.08  -.05   .00   .1  .06  .06 |    9.6  -64.1    1.3
gfz  50 | .00  .00  .02   .27  -.01  -.06  -.2  .06  .06 |  307.4   78.4     .3
igr  n/a| .01 -.01  .00  -.18   .26   .05  -.1  .04  .04 |    2.3    5.2     .3
jpl  36 | .00  .01  .00  -.10  -.09   .04   .1  .05  .05 |  307.2   78.0     .3
ngs  50 | .00 -.06 -.03   .15   .01   .25  -.1  .18  .17 |    1.5    3.5   79.9
sio  107| .00  .01 -.02   .08  -.05  -.52   .1  .07  .07 |     .0     .0     .0

Table 2.0912.5   GPS week: 0912   Day: 5   MJD: 50633.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .00 -.01  -.35   .02   .09  -.2  .05  .05 |     .5   -3.4     .4
emr  29 | .00 -.01  .00   .13   .23   .55   .0  .12  .12 |  379.1   74.3     .5
esa  53 | .01  .00 -.01  -.07  -.06   .23   .1  .07  .06 |    8.5  -72.2    1.2
gfz  47 | .00  .00  .01   .29   .10  -.07  -.2  .06  .06 |  380.5   74.8     .4
igr  n/a| .00 -.02  .00   .18   .14   .04   .0  .05  .05 |     .0    1.1     .4
jpl  37 | .00  .01  .01  -.09  -.14  -.01   .1  .04  .04 |  380.1   75.1     .4
ngs  50 |-.01 -.07  .00   .56   .32   .13  -.5  .18  .16 |    -.8   -6.0   81.7
sio  108| .00  .00 -.01   .06  -.02  -.57   .4  .06  .06 |     .0     .0     .0

Table 2.0912.6   GPS week: 0912   Day: 6   MJD: 50634.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  76 | .00  .01 -.01  -.33   .05   .12  -.2  .09  .05 |   13.3  -16.3     .5
emr  30 | .01 -.01  .00   .10   .17   .97  -.3  .11  .11 |   67.4   -3.6     .4
esa  51 | .00  .01  .00  -.20  -.08   .21   .0  .08  .07 |   33.9  -66.5     .9
gfz  47 | .00 -.01  .01   .27   .05  -.08  -.1  .05  .05 |  471.4   77.7     .4
igr  n/a| .00 -.01 -.01  -.01   .01   .05   .2  .06  .04 |   -1.4    1.1     .7
jpl  36 | .00  .02  .00  -.11  -.20  -.26   .1  .09  .10 |  471.1   77.7     .5
ngs  47 |-.01 -.05  .01   .10   .28  -.04  -.2  .18  .17 |   11.1  -11.9   78.8
sio  104| .00 -.01 -.01   .03   .16  -.79   .3  .11  .10 |     .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 3.0912.0   GPS week: 0912   Day: 0   MJD: 50628.0

               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  |   4   7   3   2   6   4  16   9    2 |    5   9   8   4  10   5  12   6    4
   2  |   3   7   6   4   6   4  15   8    2 |    5   8  12   5  11   5  16  10    5
   3  |   5   5   5   6   4   3  14   8    2 |    5   5   8   6  12   5  13   6    4
   4  |   4   8   5   6   3   3  22   6    3 |    4  10   7   5  11   4  17   6    4
   5  |   3   9   7   7   6   5  14   8    3 |    5   6   9   5  13   5  14   6    4
   6  |   5  12   6   6   5   4  12  12    3 |    4   9   8   5  13   5  14  10    4
   7  |   4   7   4   3   5   4  16  11    2 |    4   8  10   3  12   4  18   7    3
   9  |   4   9   5   3   3   3   7   9    2 |    4   8   7   5  10   5   9   6    4
  10E |   3   9   6   7   7   2  25   9    3 |    2   5   4   7   7   2  17   6    2
  14E |   3  10   9   5   5   3  16   6    3 |    4   9   8   4  11   5  17   5    4
  15  |   3   6   3   3   5   3  13  11    2 |    3   6   2   3   7   2   8   7    2
  16E |   6   9  18   6   7   6  15   7    4 |    4  10  20   6  12   8  18   6    8
  17  |   3   7   5   5   4   3  18   5    2 |    5  10   8   5  13   4  14   5    4
  18  |   4   8   5   8   4   4  12   7    3 |    6   8  10   6  12   5  13   7    5
  19  |   3   7   4   6   5   3  14   7    2 |   10  11  12  11  12   8  16  14    9
  21E |   4  16   6  12   5   4  19   9    4 |    5  13   6   7  10   7  15   6    5
  22  |   2   7   4   5   6   3  32   8    3 |    5  10   9   6  13   5  26   9    5
  23E |   7  15   6   6   6   6  18  14    4 |   15  16  17  14  18  14  26  15   14
  24  |   4   6   8   5   4   3  25   9    3 |    3   7   9   6  13   4  14   8    4
  25  |   3   5   3   3   3   3  19  10    2 |    8   9   9   8  12  12  14  10    8
  26  |   3   8   6   5   5   5  13  11    3 |   10  10  12   8  14   4  13  10    7
  27  |   3   8   5   3   7   2  11   6    2 |    5   8   9   7  10   6  10   9    6
  29  |   5   8   4   5   3   4  13  11    2 |    6   7   8   5  12   6  11  10    4
  30  |   3  13   6   5   4   5  15   8    3 |    4  10   9   4  12   5  13   7    4
  31  |   4   6   6   6   5   3  11  10    2 |    6   5   8   7  13   6  15  11    5
------|--------------------------------------|--------------------------------------
 RMS  |   4   9   6   6   5   4  17   9      |T   6   9   9   6  11   6  15   8    5
 WRMS |   4   9   6   6   5   4  16   8      |NE  5   8   8   5  11   5  14   8    5
 MEDI |   4   8   5   5   5   3  15   9      |MD  5   9   9   6  12   5  14   7    4

Table 3.0912.1   GPS week: 0912   Day: 1   MJD: 50629.0

               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  |   4   8   7   5   3   3  34   5    3 |    4   9   5   5   9   4  17   6    3
   2  |   3   8   5   4   4   6  16   8    3 |    2   8   5   4   8   7  14  10    3
   3  |   4   7   7   5   4   3  12   8    2 |    3   6   5   4  10   5  10   9    3
   4  |   4   9   6   7   5   3  20   6    3 |    4  12   3   6  11   4  14   6    4
   5  |   3  12   9   7   4   4  13  18    4 |    3   8   4   5   8   4  11  18    4
   6  |   5  11   7   5   3   3  15   8    3 |    4  10   4   5  10   4  17   8    4
   7  |   2   9   5   3   6   3  14   5    2 |    2   9   7   3  12   6  15   6    3
   9  |   3  10   6   4   4   3  12   7    2 |    4   9   4   5  11   7  14   8    4
  10E |   4   8   7   5   4   4  29   7    3 |    2   6   4   6   9   3  18   7    3
  14E |   2  10   5   5   5   4  14   6    2 |    4   8   6   6  10   4  15   6    4
  15  |   3   7   5   3   4 ---  15   6    2 |    2   7   3   3   6 ---   8   6    2
  16E |   3  10   6   3   5   2  15   6    2 |    7   9  10   7  10   9  17  10    7
  17  |   4   9   5   4   3   4  18   5    2 |    4  11   5   4  10   4  16   6    4
  18  |   5   8   7   7   4   3  10   5    2 |    6   8   8   7   9   6  11   7    5
  19  |   4  10   6   5   4   3  10   7    2 |   12  13  13  12   9   9  15  15   12
  21E |   3  19   6   8   3   5  21   5    3 |    4  15   3   5  10   6  19   5    4
  22  |   3   9   4   4   5   3  29   5    3 |    3  10   6   7  11   5  26   6    4
  23E |   6  18  10   5   6   4  23  12    4 |   19  20  17  18  18  17  32  23   18
  24  |   3  10   5   6   4   4  17   6    2 |    3  10   4   5   9   4  12   8    4
  25  |   2   6   6   4   3   3  18   4    2 |    5   7   5   5  13   9  11   7    5
  26  |   4  11   8   5   4   4  12   7    3 |    7  10  12   8  11   3  10  10    7
  27  |   3   6   3   4   3   4   9  10    2 |    4   8   4   6   9   7   9  10    4
  29  |   5   9   5   5   3   4  21   4    3 |    6   7   5   5  10   4  14   6    4
  30  |   3  10   5   5   3   4  16   7    2 |    3  10   5   4   9   3  16   7    3
  31  |   5   6   6   4   4   3  13   8    2 |    3   5   7   7  10   4  13   8    4
------|--------------------------------------|--------------------------------------
 RMS  |   4  10   6   5   4   4  18   8      |T   5   9   7   6  10   6  15   9    5
 WRMS |   4  10   6   5   4   4  17   6      |NE  4   9   6   5   9   5  14   8    4
 MEDI |   3   9   6   5   4   4  15   6      |MD  4   9   5   5  10   5  14   7    4

Table 3.0912.2   GPS week: 0912   Day: 2   MJD: 50630.0

               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  |   4   8   9   5   5   6  15   7    3 |    4  11   9   5   6   7  15   8    5
   2  |   4   9   5   4   7   2  13   7    2 |    2  11   9   6   8   3  14  12    4
   3  |   6   5   6   5   3   4  16   8    3 |    4   7  10   6   9   6  20   8    5
   4  |   3   8   4   4   2   7  20   8    3 |    4  10   9   4   5   7  18   6    4
   5  |   3   6   7   8   3   4  11   9    3 |    3   5  10   4   5   5  14  10    4
   6  |   6  13   4   7   6   3  15   7    3 |    4   9   8   6   9   4  18   9    4
   7  |   3   7   4   4   5   3  22   4    2 |    4   9  10   5   9   4  22   7    4
   9  |   5   9   9   4   4   5  16  11    3 |    3   9   6   5   5   6  14  12    3
  10E |   2  13  10   9   5   4  26   7    4 |    2   6   4   8   5   3  16   6    2
  14E |   4  12   5   8   4   6  20   5    3 |    8  12   9   6  10   9  21   9    7
  15  | --- ---   2 --- --- --- --- ---    0 |  --- ---   0 --- --- --- --- ---  ---
  16E |   4  11   5   5   3   5  19   7    3 |    7  10   8   5   7   9  19   9    6
  17  |   6   7   4   4   3   3  13   4    2 |    5   7   8   5   7   4  15   6    3
  18  |   4   7   6   9   3   4  15   4    3 |    6  10   9   7   8   5  16   8    6
  19  |   4   8   6   4   3   3  11   7    2 |    9  12  11   8  12  11  16  12   10
  21E |   7  13   6  10   3   4  26   6    4 |    6  15   7   6   7   6  21   7    4
  22  |   3   7   4   5   2   4  16   7    2 |    3   8   9   7   7   4  21  11    4
  23E |   6  23   7   5   6   6  44   7    5 |   24  28  24  24  24  23  47  23   24
  24  |   3   7   3   4   3   3  11   6    2 |    3   8  10   4   6   4  12   6    3
  25  |   4   6   6   3   4   4  14   6    2 |    5   8   8   5   8   7  16   7    5
  26  |   4   8   5   5   4   4  13   5    2 |    9  12   8   8   8   5  11   6    7
  27  |   3   7   5   3   3   3  14   6    2 |    4   6   8   6   5   5  13   8    4
  29  |   4   6   4   5   4   5  11   4    2 |    4   8   8   5   7   6  16   7    4
  30  |   3   9   6   9   4   3  15   7    3 |    3   9   9   4   5   3  14   8    3
  31  |   6   6   5   6   3   4  14  10    3 |    5   6  10   7   8   5  18  10    4
------|--------------------------------------|--------------------------------------
 RMS  |   4  10   6   6   4   4  18   7      |T   6  10   9   7   8   7  19   9    6
 WRMS |   4  10   6   6   4   4  18   6      |NE  4   8   8   5   7   5  16   8    4
 MEDI |   4   8   5   5   4   4  15   7      |MD  4   9   9   6   7   5  16   8    4

Table 3.0912.3   GPS week: 0912   Day: 3   MJD: 50631.0

               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   7   4   4   4   5  15  10    3 |    6   8   7   5   7   4  11  10    4
   2  |   4   8   9   4   7   2  18  11    3 |    5   9   7   5   6   5  16   9    4
   3  |   4   6   5   4   4   2  12   6    2 |    4   6   6   5   6   4  13   5    4
   4  |   4  10   6   5   5   3  27   6    3 |    4  13   8   5   9   6  24   7    5
   5  |   4   9   4   4   4   3  13   7    2 |    5   7   4   5   5   4  10   9    3
   6  |   5  14   5   6   3   4  13   6    3 |    5  11   7   5   7   5  11   8    4
   7  |   4   8   5   3   5   4  14   7    2 |    3   9   6   4   7   6  13   8    3
   9  |   6  10   6   5   6   3  11   7    2 |    3   9   6   5   6   6   8   7    4
  10E | --- ---   1 --- --- --- --- ---    0 |  --- ---   0 --- --- --- --- ---  ---
  14E |   4  11   5   3   5   3  12   6    2 |    6  11   7   6  10   7  14  10    7
  15  |   3   8   4   5   5 ---  16  10    3 |    3   8   4   5   6 ---  12   7    4
  16E |   4  12   6   5   6   4  15   7    3 |    6   9   8   5   8   7  15   9    6
  17  |   5   8   3   4   4   3  15   6    2 |    5   9   7   5   8   4  17   6    5
  18  |   5  11   5   9   5   4  16   5    3 |    5  12   8   7   8   5  16   6    5
  19  |   5   7  11   4   4   2  12   8    3 |   14  17  17  16  17  15  26  16   16
  21E |   5  21   8   9   5   4  23   7    4 |    5  14   9   5   8   6  17   8    5
  22  |   4   8   3   6   5   3  16   8    2 |    5  10   7   6   8   5  18   6    5
  23E |   8  25   5   7   9   4  44   8    5 |   14  16  15  17  14  14  24  17   14
  24  |   5   7   3   4   7   3  27   5    3 |    4   8   8   5   9   4  24   8    5
  25  |   4   8   6   6   4   3  11   7    2 |    5   7   8   6   7   8  12   9    6
  26  |   8   8   5   5   5   4  20   7    3 |    9  10  10   6   6   5  10  10    7
  27  |   4   6   5   3   3   4  18  10    3 |    5  11   9   8   9   7  17  14    7
  29  |   4   8   4   4   3   4  15   5    2 |    5   7   6   5   4   3  14   6    4
  30  |   4  14   5   4   4   3  16   5    2 |    4  12   5   4   7   4  14   5    4
  31  |   6   7   4   5   4   3  13   6    2 |    5   8   7   7   8   5  12   9    5
------|--------------------------------------|--------------------------------------
 RMS  |   5  11   5   5   5   3  19   7      |T   6  10   8   7   8   6  16   9    6
 WRMS |   5  11   6   5   5   3  20   6      |NE  5   9   7   6   7   6  15   8    5
 MEDI |   4   8   5   5   5   3  15   7      |MD  5   9   7   5   8   5  14   8    5

Table 3.0912.4   GPS week: 0912   Day: 4   MJD: 50632.0

               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  10   8   6   4   7  12   8    3 |    4   8   4   5   5   5  12   6    3
   2  |   5   8   9   4   3   3  17   5    3 |    4   9   5   4   6   4  18   6    3
   3  |   5   5   7   4   3   4  17   6    2 |    4   6   6   6   6   5  14   6    3
   4  |   4  10   6   7   5   4  27   7    3 |    5  12   6   3   6   4  25   6    4
   5  |   5  14   5   6   4   4   9  13    3 |    4  11   5   5   5   5  12  12    4
   6  |   6   8   8   6   4   4  14   9    3 |    4  12   5   6   6   5  14   9    4
   7  |   5   9   7   5   3   4  16   7    3 |    2  10   4   4   5   6  14   6    3
   9  |   8  12   7   5   5   7  12  12    4 |    4  12   6   7   7   7  14  14    6
  10E |   9  16   7  10   5 ---  30   9    5 |    7  13   6   8   7 ---  21   6    6
  14E |   3  10   4   4   4   4  16   6    2 |    6  10   4   5   6   5  19   7    4
  15  |   5   8   5   4   4   4  12   7    2 |    4   7   5   4   5   4  13   4    3
  16E |   3   9   6   4   4   3  18   7    3 |    5   8   7   6   7   5  21   8    5
  17  |   5   8   5   4   3   4  19   5    2 |    5  11   5   5   5   5  17   7    4
  18  |   4   9   7   9   3   3  12   5    3 |    6  13   7   8   9   7  16   9    8
  19  |   7   7   8   8   4   6  17   5    3 |   27  23  20  24  22  26  28  24   24
  21E |   4  19   6   7   4   4  22   6    4 |    5  13   6   6   7   6  19   7    5
  22  |   3   8   5   6   3   4  15   9    3 |    5   9   8   6   7   7  15   9    5
  23E |   8  21   7   7   5   5  36   6    5 |   14  27  14  12  18  18  38  17   16
  24  |   4   8   5   4   5   4  20   7    3 |    5  10   5   4   7   4  19   6    4
  25  |   5   6   6   3   4   6  10   7    2 |    5   8   9   7   7  10  12   7    6
  26  |  10   9   6   4   5   5  11   7    3 |   10  11   8   8   6   5  12   7    7
  27  |   3   9   4   4   4   5   9   7    2 |    5  11   8   6   8   5  16   9    6
  29  |   5   7   5   5   2   4  14   7    2 |    4   7   4   5   5   6  13   6    4
  30  |   5  12   4   6   3   4  12   7    3 |    4  11   4   5   4   3  14   7    4
  31  |   7   6   4   7   6   3  13   7    2 |    3   6   5   8   7   4  13   8    3
------|--------------------------------------|--------------------------------------
 RMS  |   6  11   6   6   4   5  18   7      |T   7  12   7   7   8   8  18   9    7
 WRMS |   5  10   6   6   4   5  17   7      |NE  7  10   7   7   7   7  16   9    7
 MEDI |   5   9   6   5   4   4  15   7      |MD  5  11   6   6   6   5  15   7    4

Table 3.0912.5   GPS week: 0912   Day: 5   MJD: 50633.0

               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  20  13   7   6   4  18   7    4 |    4  17   6   5   7   4  13   8    4
   2  |   5   8   6   3   6   3  14   7    2 |    4   9   5   5   7   5  14   6    4
   3  |   5   5   5   6   3   3  13   6    2 |    4   6   5   7   6   4  13   7    3
   4  |   4  13   7   8   4   3  15   6    3 |    4  11   8   6   9   5  19   6    4
   5  |   3   9   5   7   4   4  10   5    2 |    5  11   5   4   6   7  12   8    5
   6  |   4  12  10   8   6   3  20   4    3 |    5  10   5   5   7   4  18   6    4
   7  |   4   9  10   4   6   5  14   6    3 |    3   9   5   5   8   5  15   7    3
   9  |   5  13  10   6   5   4  10   8    3 |    3  12   5   5   7   7  12  12    5
  10E |   4  15   5   5   5   3  22   6    3 |    5  13   5   8   6  12  21   7    5
  14E |   6  13   9   6   6   3  17   5    3 |    5  12   9   9  13   9  22   9    8
  15  |   6   9   6   5   4   4  13   7    3 |    4  11   5   5   5   3  11   6    3
  16E |   5  12   8   5   5   3  26   6    3 |    5  10   7   6   8   6  27   6    5
  17  |   6   8   4   4   4   4  14   7    2 |    5  10   6   7   7   5  12   7    4
  18  |   4   8   6   4   3   3  13   5    2 |    7  11   8   7   8   4  15   9    6
  19  |   5   8   5   3   4   2  10   6    2 |   22  19  23  21  20  20  28  22   22
  21E |   4  27   4   9   5   3  25   5    4 |    5  14   7   7   7   6  21   8    5
  22  |   4   7   4   4   4   3  17   5    2 |    4   8   5   7   7   6  14   7    5
  23E |   7  22   3  12  10   6  49   9    5 |   10  16   9  15  14   9  39  12    9
  24  |   4   8   7   4   4   3  13   6    2 |    3   8   5   6   6   4  16   5    4
  25  |   5   7   5   4   3   3  12   9    2 |    5   8   7   6   6   7  12   8    5
  26  |   5   9   5   4   5   3  13   6    2 |    6   8   6   6   8   4  14   7    5
  27  |   4   8   5   3   5   3  11   6    2 |    4  11   9   7   9   5  13   6    5
  29  |   4  10   5   4   3   5  19   5    3 |    5   7   5   6   5   6  15   7    5
  30  |   5  13   5   5   3   4  10   5    2 |    4  13   4   4   5   5  13   7    5
  31  |   7   7   6   7   4   4  11   9    3 |    4   7   4  10   7   4  14  11    5
------|--------------------------------------|--------------------------------------
 RMS  |   5  12   7   6   5   4  18   6      |T   6  11   7   8   8   7  18   8    6
 WRMS |   5  12   6   6   5   4  16   6      |NE  6  10   7   7   8   6  15   8    6
 MEDI |   5   9   5   5   4   3  14   6      |MD  5  11   5   6   7   5  14   7    5

Table 3.0912.6   GPS week: 0912   Day: 6   MJD: 50634.0

               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   9  11   4   4   5  14  11    3 |    7  10   4   4   6   5  15   9    4
   2  |   3   7   7   4   3   3  13  12    2 |    5   9   8   6   6   5  15   9    5
   3  |   4   6   4   4   5   5  26   8    3 |    3   5   5   5   4   5  16   7    3
   4  |   4   8  10   5   3   3  20  11    3 |    7  12   6   6   7   8  21  10    6
   5  |   4   7   5   4   5   3  13   9    2 |    5   7   6   6   5   5  11   9    6
   6  |   5   9   8   5   4   3  18  11    3 |    4   9   5   5   5   4  14   9    4
   7  |   4   8  12   6   4   4  13   9    3 |    3  11   5   3   7   6  15   8    3
   9  |   7  13   7   4   6   4  16  14    3 |    4  11   5   6   6   5  13  14    5
  10E |   4  14   5   5   5   4  19  12    3 |    5   7   4   7   7  11  16   7    5
  14E |  40  15 --- ---  18  42  34 ---   22 |    3  10 --- ---  15  41   4 ---   19
  15  |   4   8  12   7   6   4  14   7    3 |    4   9   6   4   6   4  11   7    4
  16E |   3   8  11   4  12   4  23  13    3 |    6   8   8   5   8   6  20  10    6
  17  |   6   9   4   4   5   4  14  11    3 |    6  13   7   5   7   7  15   9    5
  18  |   4   9   7   3   5   4  12   8    2 |    5   8   8   8   6   5  12   8    6
  19  |   4   6   8   5   3   3   8  13    3 |   19  21  19  16  17  18  28  25   20
  21E |   4  29   6   6   3   5  26  13    5 |    6  13   9   6   7   7  17  12    6
  22  |   5   6   4   2   7   3  18  12    2 |    5   8   6   5   7   6  15  13    6
  23E |   8  20   5   4   6   5  26  11    4 |   14  19  13  14  14  14  20  11   14
  24  |   3   8   8   3   3   2  14   9    2 |    3   9   6   5   7   5  17   8    4
  25  |   4   6   6   5   6   5  11   8    2 |    7   9   9   7   8   8  13  11    8
  26  |   6   6   7   4   3   4  16  10    3 |    9  11   9   9   8   6  12  11    7
  27  |   4   7   5   4   5   4  13  14    3 |    8  10  10  10  10   7  13  11    8
  29  |   7   8   7   5   5   6  15  14    3 |    6   7   5   6   5   6  15  14    5
  30  |   5  11   6   6   5   3  15   7    3 |    4  11   6   5   5   5  14   7    5
  31  |   4   6   7   5   4   4  19  10    3 |    4   6   5   7   5   4  16   9    4
------|--------------------------------------|--------------------------------------
 RMS  |   9  11   8   5   6   9  18  11      |T   7  10   7   7   8  11  15  10    7
 WRMS |   5  11   7   5   4  10  17  10      |NE  6  10   7   6   7   6  15  11    6
 MEDI |   4   8   7   4   5   4  15  11      |MD  5   9   6   6   7   6  15   9    5

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 4.0912   GPS week: 0912   MJD: 50628.0-50634.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2366 |U  62   42   76 |U  35   23   74 |   26   15   47 |
emr | emr 2332 |  382  379  384 |  379  378  384 |U 378  378  380 |
esa | esa 2181 |  109   47   78 |U  51   42   99 |   41   25   67 |
gfz | gfz 1162 |   73   44   72 |U  38   27   77 |   28   18   49 |
igr | igr 2369 |   58   40   71 |   36   25   74 |   26   16   51 |
igs | igs 2399 |   61   41   76 |   40   37   91 |   36   19   57 |
jpl | jpl 2310 |U  62   41   72 |U  35   23   74 |   27   15   49 |

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 5.0912.0   GPS week: 0912   Day: 0   MJD: 50628.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2398 |   44   27   84 |   40   25   57 |   25   16   39 |
emr | emr 2398 |   47   26   79 |   41   26   56 |   24   16   41 |
esa | esa 2309 |   46   30   81 |   56   28   64 |   28   21   50 |
gfz | gfz 1163 |   33   23   75 |   49   26   61 |   26   17   35 |
igr | igr 2398 |   42   27   79 |   41   25   59 |   25   16   39 |
igs | igs 2400 |   44   26   79 |   42   24   56 |   24   15   41 |
jpl | jpl 2378 |   43   26   80 |   41   24   56 |   24   16   39 |

Table 5.0912.1   GPS week: 0912   Day: 1   MJD: 50629.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   91   85   70 |   26   21   76 |   35   16   40 |
emr | emr 2394 |   91   76   73 |   26   22   78 |   35   14   41 |
esa | esa 2127 |  261   96   97 |   39   21   90 |   39   25   51 |
gfz | gfz 1200 |  112   85   43 |   24   24   88 |   40   19   35 |
igr | igr 2400 |   84   77   53 |   24   21   76 |   35   15   42 |
igs | igs 2400 |  119   81   57 |   25   21   78 |   35   16   42 |
jpl | jpl 2284 |   83   80   61 |   30   20   75 |   35   16   44 |

Table 5.0912.2   GPS week: 0912   Day: 2   MJD: 50630.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2293 |   51   42   67 |   40   18   75 |   25   13   49 |
emr | emr 2279 |  999  999  999 |  999  999  999 |  999  999  999 |
esa | esa 2197 |   51   41   63 |   41   28   92 |   57   23   74 |
gfz | gfz 1126 |   56   50   71 |   31   20   64 |   27   18   52 |
igr | igr 2294 |   49   41   64 |   40   21   80 |   27   15   53 |
igs | igs 2393 |   48   41   69 |   40   21   84 |   57   16   69 |
jpl | jpl 2284 |   50   42   64 |   39   19   79 |   26   13   50 |

Table 5.0912.3   GPS week: 0912   Day: 3   MJD: 50631.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2291 |   86   30   91 |   23   21   71 |   21   17   51 |
emr | emr 2283 |   85   32   89 |   23   24   67 |   22   17   50 |
esa | esa 2168 |   60   39  107 |   62   82  163 |   57   37   88 |
gfz | gfz 1140 |  113   28   91 |   24   25   63 |   21   18   59 |
igr | igr 2302 |   85   28   87 |   23   24   68 |   22   16   55 |
igs | igs 2399 |   51   32  109 |   55   79  154 |   44   35   78 |
jpl | jpl 2192 |   92   30   89 |   26   21   71 |   23   15   52 |

Table 5.0912.4   GPS week: 0912   Day: 4   MJD: 50632.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2386 |   50   26   79 |   32   32   80 |   24   14   53 |
emr | emr 2301 |   55   28   78 |   31   35   85 |   25   17   53 |
esa | esa 2113 |   42   27   67 |   48   38   80 |   33   19   68 |
gfz | gfz 1183 |   31   30   71 |   27   37   97 |   25   19   56 |
igr | igr 2399 |   31   26   73 |   33   34   81 |   24   15   55 |
igs | igs 2398 |   31   26   74 |   30   33   80 |   24   14   54 |
jpl | jpl 2273 |   53   27   73 |   28   33   84 |   25   16   55 |

Table 5.0912.5   GPS week: 0912   Day: 5   MJD: 50633.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2398 |   50   22   73 |   40   20   77 |   25   15   46 |
emr | emr 2393 |   49   24   73 |   38   22   77 |   25   16   47 |
esa | esa 2236 |   61   27   61 |   60   28   80 |   27   21   66 |
gfz | gfz 1184 |   64   26   80 |   37   25   74 |   24   20   48 |
igr | igr 2400 |   51   25   71 |   42   21   76 |   24   17   49 |
igs | igs 2400 |   51   23   68 |   41   21   74 |   25   16   51 |
jpl | jpl 2379 |   51   23   72 |   40   21   76 |   25   17   48 |

Table 5.0912.6   GPS week: 0912   Day: 6   MJD: 50634.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2397 |   36   21   63 |   40   22   77 |   25   14   50 |
emr | emr 2279 |   38   25   65 |   43   27   79 |   25   15   48 |
esa | esa 2116 |   39   30   59 |   46   34   93 |   28   23   65 |
gfz | gfz 1140 |   46   25   62 |   57   30   84 |   28   18   54 |
igr | igr 2387 |   40   24   61 |   40   28   77 |   24   15   59 |
igs | igs 2400 |   36   22   60 |   40   24   75 |   25   15   51 |
jpl | jpl 2380 |   37   22   60 |   38   23   75 |   26   15   51 |

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