Subject: [IGSREPORT-3919] Wk 0911 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Wed, 9 Jul 1997 9:54:31 PDT

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IGS Electronic Report    Wed Jul  9  9:54:31 PDT 1997      Message Number 3919
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0911 IGS Final Orbits

Final IGS Orbit Combination - Week 0911   (Jun 22, 1997 - Jun 28, 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 (IGS09117.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:

 IGS09110-6.SP3  IGS GPS ephemeris files for days 0-6, week 0911 in SP3 format.
 IGS09117.ERP    Earth Rotation Parameters (ERP) and their rates as well as
                 Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                 with IGS ephemerides.
 IGS09117.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
                  ----+---------
                  0-6 |  15 

6. 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
                  ----+--------+--------+-------------
                   0  |  IGR   | ~12:30 | ~ 27.6 ns

7. 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  |  EMR   |  ALL (a)
                   4  |  EMR   |  ALL (a)

   (a) Z-rotation problems that affected the combined solution (see Table 2).

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
         ------------+----------+-------+----------+-------------------
          1 (Jun 23) | 00:00:00 |  14   |   ALL    | Modeling problems
          3 (Jun 25) | 00:00:00 |  19   |   ALL    | Modeling problems
          3 (Jun 23) | 00:00:00 |  23   |   ALL    | Modeling problems

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS09117.SUM).

Table 1: Week 0911 summary.                       (Jun 22, 1997 - Jun 28, 1997)

Table 1.0911.a   GPS week: 0911   MJD: 50621.0-50627.0

         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  81 | .00  .01 -.01  -.10   .13   .11  -.1  .05  .04 |    3.7     .1     .5
        | .00  .00  .00   .05   .06   .12   .1           |    7.5   14.5
emr  30 | .00 -.02  .00   .38   .22   .76  -.1  .10  .10 | 1059.7   81.9     .5
        | .01  .01  .00   .09   .08   .36   .1           |  180.5    9.3
esa  52 | .00  .00  .00  -.13  -.18   .09   .2  .08  .07 |   10.0  -46.5    1.4
        | .00  .00  .01   .09   .13   .12   .1           |   15.4   19.8
gfz  51 | .00  .00  .01   .12   .07  -.12  -.1  .06  .06 | 1061.3   82.4     .5
        | .00  .00  .00   .07   .07   .13   .0           |  180.6    8.9
igr  n/a| .00 -.02  .01  -.01   .13  -.01   .0  .06  .05 |   -2.3    8.8     .6
        | .00  .01  .01   .18   .07   .16   .1           |    4.8   22.1
jpl  37 | .00  .01  .01  -.03  -.16   .03   .2  .05  .05 | 1394.1   71.1     .4
        | .00  .00  .00   .08   .07   .05   .0           | 1001.5   35.6
ngs  50 | .01 -.05 -.01  -.19   .37   .30  -.1  .17  .17 |     .0    4.0   80.1
        | .01  .01  .01   .26   .27   .17   .2           |    7.5    9.3
sio  107| .00  .01 -.01   .01  -.13  -.59   .0  .08  .07 |     .0     .0     .0
        | .00  .01  .01   .14   .03   .15   .2           |     .0     .0

Table 1.0911.b   GPS week : 0911   MJD: 50621.0-50627.0

         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   2   3   3   3   3 |
   2E |   3   3   3   2   3   2   2 |
   3  |   2   2   2   3   3   2   2 |
   4  |   3   3   3   3   3   4   3 |
   5E |   2   3   3   4   3   2   3 |
   6  |   3   3   3   3   3   3   3 |
   7  |   3   2   3   3   4   2   3 |
   9  |   3   3   2   3   2   2   3 |
  10E |   3   3   3   3   3   4   3 |
  14E |  34   2   3   3   2   3   2 | Modeling problems on day 0.
  15  |   3   2   2   3   2   2   2 |
  16E |   3   2   2   3   3   2   3 |
  17  |   2   2   2   3   3   3   2 |
  18  |   2   2   3   3   3   3   2 |
  19  |   3   2   6   5   2   2   2 |
  21E |   3   3   3   4   3   4   4 |
  22E |   3   2   2   3   3   3   6 |
  23E |   4   3   4   3   6   3   3 |
  24  |   3   2   3   3   3   2   3 |
  25  |   3   3   3   3   3   2   3 |
  26  |   3   3   2   3   3   2   2 |
  27  |   3   2   3   3   3   3   2 |
  29  |   3   2   2   3   3   2   2 |
  30E |   3   4   3   3   2   2   2 |
  31  |   3   2   2   2   2   2   2 |

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 2.0911.0   GPS week: 0911   Day: 0   MJD: 50621.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .01  .01 -.01  -.04   .07   .12  -.1  .09  .05 |   15.3  -21.2     .4
emr  31 | .00 -.02  .00   .31   .10  1.38  -.2  .10  .10 |  816.9   71.2     .3
esa  51 | .00 -.01  .01   .05  -.11  -.07   .1  .06  .06 |   -4.4  -53.2    1.2
gfz  52 | .00  .00  .01   .06   .10   .03  -.1  .04  .04 |  818.4   71.7     .2
igr  n/a| .01 -.03  .01   .26   .16   .30   .0  .09  .05 |  -13.0   58.8     .6
jpl  37 | .01  .01  .00   .00  -.07   .05   .1  .07  .07 |  818.2   71.7     .3
ngs  52 | .02 -.06  .00  -.11   .06   .18   .2  .16  .17 |    1.4    4.3   81.3
sio  114| .00  .01 -.01  -.12  -.15  -.48   .0  .09  .08 |     .0     .0     .0

Table 2.0911.1   GPS week: 0911   Day: 1   MJD: 50622.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .01 -.02  -.07   .10  -.01  -.2  .04  .04 |   -1.8    6.7     .7
emr  32 | .00 -.02  .00   .25   .16   .76   .1  .09  .09 |  889.5   84.5     .5
esa  55 | .00  .00  .00  -.05  -.24   .09   .2  .07  .07 |    9.1  -13.2    1.4
gfz  53 | .00  .00  .01   .02   .14  -.18  -.1  .04  .04 |  891.0   84.8     .5
igr  n/a| .01 -.03  .01   .14   .09  -.17  -.1  .06  .06 |     .7   -1.6     .5
jpl  37 | .00  .00  .01   .01  -.16  -.03   .2  .04  .04 |  890.8   84.7     .4
ngs  51 | .00 -.04 -.02   .12   .03   .09   .1  .17  .17 |   -3.5    1.6   80.0
sio  108|-.01  .02  .00  -.21  -.14  -.54   .0  .08  .08 |     .0     .0     .0

Table 2.0911.2   GPS week: 0911   Day: 2   MJD: 50623.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .01  .01 -.01  -.07   .12   .01  -.1  .05  .04 |   -3.9    6.4     .4
emr  30 | .00 -.03  .00   .36   .21   .52  -.1  .08  .08 |  968.4   90.4     .3
esa  51 | .00  .00  .01  -.20  -.35   .01   .2  .12  .08 |  -14.2  -51.7    1.0
gfz  52 | .00  .00  .01   .16   .02  -.14  -.1  .07  .07 |  970.2   90.7     .3
igr  n/a| .00 -.02  .01   .05   .22   .01   .1  .04  .04 |    -.2     .4     .4
jpl  37 |-.01  .01  .01  -.16  -.18   .02   .2  .04  .04 |  969.8   90.8     .3
ngs  48 | .02 -.06  .00   .07   .60   .14  -.4  .16  .16 |  -14.6   18.8   81.2
sio  102| .00  .01  .00   .00  -.11  -.42   .1  .06  .05 |     .0     .0     .0

Table 2.0911.3   GPS week: 0911   Day: 3   MJD: 50624.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .01  .01 -.01  -.09   .24   .06  -.1  .05  .04 |   -2.4   13.8     .5
emr  29 |-.01 -.02 -.01   .36   .18   .43  -.2  .09  .09 | 1058.0   94.7     .5
esa  50 | .00  .00 -.01  -.17  -.34   .00   .3  .08  .06 |   10.5  -41.3    1.8
gfz  51 | .00  .00  .01   .22   .18   .00  -.1  .07  .07 | 1059.3   94.6     .5
igr  n/a| .00 -.02  .00  -.23   .12  -.03  -.1  .04  .04 |    -.1    -.5     .4
jpl  37 | .00  .01  .01  -.09  -.29  -.03   .2  .04  .04 | 1059.0   94.7     .4
ngs  51 | .02 -.06 -.02  -.18   .79   .57  -.2  .17  .16 |     .6   11.3   80.3
sio  105| .00  .02 -.01   .04  -.08  -.45  -.3  .09  .09 |     .0     .0     .0

Table 2.0911.4   GPS week: 0911   Day: 4   MJD: 50625.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .01  .01 -.01  -.07   .15   .32  -.1  .05  .04 |   12.3  -11.2     .5
emr  30 | .01 -.03  .00   .46   .36  1.15  -.1  .10  .10 | 1143.0   82.2     .4
esa  53 | .00 -.01  .01  -.17  -.04   .30   .1  .07  .07 |   32.0  -33.8    1.3
gfz  50 | .00  .00  .01   .13  -.01  -.01  -.2  .08  .08 | 1145.1   82.6     .4
igr  n/a| .00 -.02  .01   .00   .16  -.02   .0  .05  .04 |    -.8    1.0     .5
jpl  36 | .00  .01  .01   .10  -.11   .10   .1  .04  .04 | 1145.2   82.5     .4
ngs  50 | .02 -.06  .01  -.66   .38   .42  -.2  .19  .19 |    2.3    2.0   81.0
sio  104| .00  .00 -.02   .08  -.11  -.73   .0  .06  .05 |     .0     .0     .0

Table 2.0911.5   GPS week: 0911   Day: 5   MJD: 50626.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .00 -.01  -.18   .15   .24  -.3  .04  .04 |    2.5   17.1     .5
emr  29 | .00 -.02  .00   .52   .27   .51  -.1  .12  .11 | 1232.1   80.8     .4
esa  52 | .00  .00  .00  -.21  -.10   .17   .1  .06  .05 |   18.6  -55.9    1.4
gfz  50 | .00  .01  .01   .18  -.01  -.28  -.1  .06  .06 | 1234.2   81.4     .4
igr  n/a| .00 -.02  .00  -.09  -.02  -.02  -.1  .05  .04 |   -1.1    1.5     .4
jpl  37 | .00  .01  .01  -.05  -.16   .06   .2  .04  .04 | 1233.9   81.2     .4
ngs  47 | .01 -.05  .00  -.31   .36   .32  -.2  .19  .18 |    8.6    1.4   77.8
sio  106| .00  .01 -.02   .11  -.15  -.66  -.2  .06  .06 |     .0     .0     .0

Table 2.0911.6   GPS week: 0911   Day: 6   MJD: 50627.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .01 -.01  -.17   .10   .06  -.2  .04  .04 |    3.8  -10.9     .5
emr  30 | .01 -.01  .00   .40   .27   .60  -.2  .09  .09 | 1309.8   69.5     .7
esa  53 | .00  .00  .00  -.15  -.10   .13   .1  .06  .06 |   18.3  -76.6    1.3
gfz  50 | .00  .00  .01   .09   .07  -.27  -.1  .05  .05 | 1311.2   70.7     .7
igr  n/a| .01 -.02 -.01  -.22   .15  -.16   .2  .04  .04 |   -1.3    2.1    1.0
jpl  37 | .00  .01  .01  -.01  -.13   .04   .1  .04  .04 | 3642.1   -7.9     .6
ngs  51 | .00 -.05 -.01  -.30   .35   .38  -.4  .16  .17 |    5.3  -11.1   79.1
sio  108| .00  .01 -.01   .18  -.15  -.82   .2  .10  .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 3.0911.0   GPS week: 0911   Day: 0   MJD: 50621.0

               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   7   6   4   3   4  10   7    3 |    6   7   8   8   7   6  12   9    7
   2E |   5  11   5   6   5   2  16   9    3 |    6  13   6   9   8   9  17  11    7
   3  |   6   6   5   3   8   3  10   7    2 |    3   5   5   5   5   4  13   7    3
   4  |   5  10   4   5   5   4  19   8    3 |    5  10   7   6   7   6  20   8    5
   5E |   4   9   6   4   6   4  11   8    2 |    9  12   8  10  10  10  15  12    8
   6  |   5  13   6   5   4   5  12   5    3 |    4  10   5   3   8   5  12   6    3
   7  |   5   8   4   5   4   6  15  12    3 |    3   7   6   5   5   5  16  12    3
   9  |   5  12   5   7   9   6  13   8    3 |    4  12   6   7   7   8  10  11    4
  10  |   6   7   4   4   5   3  15   9    3 |   14  16  17  16  14  15  21  18   15
  14  |  39 --- --- ---  38  30 --- ---   34 |    3 --- --- ---  18  44 --- ---   25
  15  |   6  12   5   4   6   5  22  10    3 |    5  14   6   5   7   5  16  10    5
  16  |   5  14   5   5   7   5  22  10    3 |   15  18  15  14  14  14  20  14   14
  17  |   4  11   5   3   5   2  16   8    2 |    6  14   8   7  11   6  19   7    6
  18  |   5   8   5   3   5   4  10   6    2 |    3   7   8   6   6   4  11   7    4
  19  |   5   6   8   3   4   3  13  13    3 |    8   9  12   5   7   6  12  11    6
  21  |   6   9   7   5   5   6  18   9    3 |   11  13  11  11  11  11  22  11   10
  22E |   4   9   6   4   9   3  13  11    3 |    8  12   6   7  11   8  14  14    7
  23  |   8   7  10   3   3   5  19  10    4 |   11  16  12  13  17  15  24  16   14
  24  |   4  11   7   4   6   4  21   7    3 |    4  10   6   6   8   6  19   8    5
  25  |   4   7   6   4   4   3  19   8    3 |    4   7   6   5   7   6  17   9    4
  26  |   7  14   4   5   5   3  14   7    3 |    7   8   9   6   8   5  12   6    6
  27  |   4   6   4   4   5   4  20   9    3 |    4   8   9   7   7   6  15  10    6
  29  |   5   9   6   3   3   5  22   9    3 |    7  12  11   7   8   5  16  11    8
  30E |   5  22  12   4   8   4  19   8    3 |   17  25  16  19  20  19  26  19   17
  31  |   5   7   5   5   7   4  14   7    3 |    4   6   6   7   7   5  15   8    4
------|--------------------------------------|--------------------------------------
 RMS  |   9  10   6   4   9   7  16   9      |T   7  12   9   8  10  12  16  11    9
 WRMS |   5  10   6   4   5   7  17   8      |NE  7  11   9   8   9  12  16  10    9
 MEDI |   5   9   5   4   5   4  16   8      |MD  6  11   8   7   8   6  16  11    6

Table 3.0911.1   GPS week: 0911   Day: 1   MJD: 50622.0

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

Table 3.0911.2   GPS week: 0911   Day: 2   MJD: 50623.0

               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   7   4   6   2   5  13   5    2 |    4   6   4   6   5   5  10   5    3
   2  |   4   8  11   3   4   3  15   5    3 |    5  10   5   5   8   6  17   7    4
   3  |   4   6   5   6   3   3  18   4    2 |    4   6   4   4   4   4  20   8    3
   4  |   4  11   7   7   3   4  18   4    3 |    4  13   5   5   5   5  16   5    5
   5  |   5  10   9   6   4   4  14   8    3 |    7  11   8   7   8   8  15  11    6
   6  |   7  12   9   8   4   3  19   5    3 |    3  10   6   4   6   5  17   7    4
   7  |   4   9   4   4   3   4  22   4    3 |    3   9   4   6   6   4  20   6    3
   9  |   4   8   7   7   5   4  12   4    2 |    4   9   7   6   6   7  12   7    4
  10E |   5   7   8   4   5   5  16   6    3 |   20  19  23  22  22  19  24  18   19
  14  |   4   7   8   7   6   3  20   5    3 |    6  10   6   5   9   6  17   6    5
  15  |   3   7   9   3   5   3  17   5    2 |    4   8   7   4   5   5  13   4    3
  16  |   3   8   4   8   5   3  14   5    2 |   14  20  17  14  16  16  20  18   16
  17  |   3   7   6   3   4   3  12   6    2 |    6  10   6   6   8   5  12   7    5
  18  |   5   7  12  11   4   4  10   5    3 |    2   7  10  11   7   4   9   7    4
  19  |   7   7  41  12   5   8  13   6    6 |    4   8  32   8   5   4   9   5    3
  21E |   5  12   6  12   4   4  17   7    3 |    8  12  10  13  11   7  17   9    8
  22  |   4   6   6   6   3   4  17   6    2 |    6  11   8   8   7   6  17   8    6
  23  |   6   8  19   6   5   5  21   8    4 |   23  20   6  19  16  23  13  21   19
  24  |   3  11  10   4   3   4  18   9    3 |    4   9   7   5   4   5  15   5    4
  25  |   3   8   7   5   3   3  22   6    3 |    5   7   8   6   6   6  18   7    4
  26  |   6   5   9   5   4   2  13   6    2 |    5   9   9   6   6   3  17   6    4
  27  |   6   5  19   3   4   3  16   7    3 |    4  10  20   5   6   6  13   8    6
  29  |   4   6   5   5   3   4  11   4    2 |    6   9   8   8   9   5  11   8    6
  30E |   5   8   6   5   3   6  16   5    3 |   13  15  12  14  14  13  25  18   13
  31  |   4   6  12   4   3   3  14   4    2 |    3   7   8   4   5   4  14   4    3
------|--------------------------------------|--------------------------------------
 RMS  |   5   8  12   7   4   4  16   6      |T   8  11  11   9   9   8  16   9    7
 WRMS |   4   8   8   7   4   4  16   5      |NE  7  10  10   7   7   7  15   8    6
 MEDI |   4   7   8   6   4   4  16   5      |MD  5  10   8   6   6   5  16   7    4

Table 3.0911.3   GPS week: 0911   Day: 3   MJD: 50624.0

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

Table 3.0911.4   GPS week: 0911   Day: 4   MJD: 50625.0

               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  14   4   5   5   6  21   5    3 |    4   9   7   5   6   5  14   7    4
   2  |   4   9   6   5   4   4  18   5    3 |    5   9   5   7   6   7  17   5    4
   3  |   7   6  11   8   4   4  15   5    3 |    4   6   4   7   5   5  14   6    3
   4  |   4  13   5   5   5   3  22   4    3 |    4  14   6   5   6   5  18   5    4
   5  |   3   9  12   9   5   3  16   6    3 |    4   8   6   6   6   5  14   7    4
   6  |   4  15   3  13   4   5  18   5    3 |    3   9   4   4   5   4  20   7    3
   7  |   6   9   4  19   6   5  13   5    4 |    3   9   7  18   7   4  17   6    5
   9  |   2  10   6   6   4   3   9   4    2 |    4   9   7   5   5   7  12   8    4
  10E |   5  12  10   7   4   3  25   5    3 |   16  21  23  18  16  15  23  15   16
  14E |   3  10   3   5   5   3  17   6    2 |    7  10   6   8   9   8  16   8    7
  15  |   3   9   5   6   4   4  17   5    2 |    5   8   7   6   6   5  14   7    4
  16E |   6   8   5  10   3   7  12   5    3 |   30  34  26  26  30  34  33  34   31
  17  |   3  12   4   5   4   5  13   8    3 |    5  15   6   7   7   8  16   9    6
  18  |   3  10   6   9   5   4  15   5    3 |    3  13   6   4   8   4  14   6    4
  19  |   4   9   5   4   4   5  20   4    2 |    2   8  10   6   4   5  16   6    3
  21E |   4  15   9   9   5   4  25   4    3 |    6  17   9   9   9   9  24   9    7
  22  |   3   7   4   6   4   4  21   6    3 |    5   9   5   5   6   5  15   7    5
  23E |  10  12  18   7  14   6  32  12    6 |   33  21  15  22  15  28  16  35   26
  24  |   3  10   5   5   3   2  28   4    3 |    4   8   7   6   5   5  17   7    4
  25  |   3   9   3   5   3   4  30   4    3 |    4   7   8   5   6   4  22   7    5
  26  |   6   7   4   6   3   5  14   5    3 |    6   9   9   6   7   5  13   5    5
  27  |   4   6   9   5   6   3  15   6    3 |    3   6   7   6   5   5  11   4    4
  29  |   3   9   6   9   3   5  19   6    3 |    6   9   9   8   6   5  14   7    6
  30E |   5  12   5   5   4   3  13   6    2 |    9  14  10   9  10  10  20  13    9
  31  |   4   6   4   6   4   3  14   5    2 |    2   6   3   6   5   4  15   5    3
------|--------------------------------------|--------------------------------------
 RMS  |   5  10   7   8   5   4  19   6      |T  10  13  10  10   9  10  17  12    9
 WRMS |   4  10   7   8   4   4  19   5      |NE  4   9   6   7   5   5  15   6    4
 MEDI |   4   9   5   6   4   4  17   5      |MD  4   9   7   6   6   5  16   7    4

Table 3.0911.5   GPS week: 0911   Day: 5   MJD: 50626.0

               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   4   4   3   5  27   4    3 |    4   9   5   4   5   5  13   6    3
   2  |   3   8   6   2   5   4  16   6    2 |    5  10   6   7   5   8  18   8    5
   3  |   4   6   8   5   3   4  12   4    2 |    4   7   3   5   4   3   9   6    3
   4  |   4  21   5   5   4   4  26   5    4 |    4  18   5   4   7   4  21   6    4
   5  |   3  11   5   7   4   4  13   6    2 |    4  10   6   5   6   7  12   9    5
   6  |   4  15   6  11   4   3  11   7    3 |    3  13   4   5   5   5  12   6    4
   7  |   4   8   3   3   4   5  19   5    2 |    3   7   5   9   5   8  20   6    4
   9  |   2  12   5   4   3   3   9   4    2 |    4  13   7   6   6   6  12   5    5
  10E |   7  14   5   6   4   4  35   5    4 |   12  14  12  14  13  12  23  13   12
  14E |   4  13   6   5   6   3  16  14    3 |    6  12   9   7  11   9  18  11    7
  15  |   3   8   5   5   5   3  11   5    2 |    4   9   4   6   5   5  10   7    3
  16E |   4   9   7   4   5   2  13   4    2 |   16  17  16  16  18  17  22  16   16
  17  |   3  10   5   6   4   4  20   7    3 |    3  10   5   5   6   4  16   6    3
  18  |   4  18   8   9   5   4  13   5    3 |    6  21   5   8   7   6  13   7    6
  19  |   4   7   6   6   5   2  13   6    2 |    2   8   4   5   4   4  12   6    2
  21E |   4  18   8   8   5   5  28   6    4 |   11  19  12  14  12  14  21  17   12
  22  |   3   7   7   5   5   3  22   6    3 |    5  11   7   6   7   8  20   8    6
  23E |   4  13   6   5   8   4  24   7    3 |    9  11   7  11   8   7  14  14    8
  24  |   2  11   3   4   4   3  20   7    2 |    3   7   4   4   6   3  11   6    3
  25  |   2   6   3   4   5   3  21   5    2 |    4   6   5   5   5   4  19   8    3
  26  |   6   8   4   6   4   5   7   5    2 |    6  10   6   5   6   4  10   5    5
  27  |   4  12   7   4   4   4  13   6    3 |    3  13   5   5   6   6  10   7    4
  29  |   3   7   5   5   5   5  19   7    2 |    7   7   8   6   8   7  12   6    6
  30E |   4  14   4   4   4   3  12   6    2 |    7  17   9   8   9  10  17  12    8
  31  |   4   6   4   4   3   3  12   6    2 |    3   6   4   5   5   5  10   6    3
------|--------------------------------------|--------------------------------------
 RMS  |   4  12   6   6   5   4  19   6      |T   6  12   7   7   7   7  15   8    6
 WRMS |   4  11   5   6   4   4  18   6      |NE  4  10   5   5   5   5  14   6    4
 MEDI |   4  10   5   5   4   4  16   6      |MD  4  10   5   6   6   6  13   7    5

Table 3.0911.6   GPS week: 0911   Day: 6   MJD: 50627.0

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

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 4.0911   GPS week: 0911   MJD: 50621.0-50627.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2382 |U  48   28   81 |U  28   26   85 |   25   15   43 |
emr | emr 2353 |   48   29   82 |   27   28   85 |U  26   15   41 |
esa | esa 2074 |   49   33   80 |U  36   30   95 |   31   24   51 |
gfz | gfz 1176 |   52   27   83 |U  28   26   82 |   27   17   45 |
igr | igr 2363 |   48   28   80 |   28   27   88 |   26   16   44 |
igs | igs 2394 |   46   28   78 |   28   26   84 |   26   15   43 |
jpl | jpl 2379 |   46   27   79 |U  27   25   83 |   26   15   42 |

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 5.0911.0   GPS week: 0911   Day: 0   MJD: 50621.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2397 |   38   25   97 |   28   31   79 |   23   16   50 |
emr | emr 2298 |   39   28  102 |   28   34   77 |   21   17   45 |
esa | esa 2090 |   39   31  100 |   34   32   80 |   27   20   54 |
gfz | gfz 1144 |   42   24  121 |   30   39   83 |   27   21   57 |
igr | igr 2400 |   40   25   95 |   31   32   82 |   22   15   53 |
igs | igs 2400 |   38   25   96 |   30   30   76 |   22   16   50 |
jpl | jpl 2390 |   37   24   97 |   28   31   77 |   22   16   49 |

Table 5.0911.1   GPS week: 0911   Day: 1   MJD: 50622.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2390 |   59   33   93 |   25   33  125 |   22   15   43 |
emr | emr 2389 |   60   33   94 |   22   35  118 |   22   15   39 |
esa | esa 2031 |   56   33   89 |   38   35  123 |   33   16   53 |
gfz | gfz 1196 |   53   28   98 |   21   26   88 |   23   15   44 |
igr | igr 2398 |   53   30   85 |   21   30  122 |   24   14   42 |
igs | igs 2400 |   57   33   92 |   24   32  117 |   23   13   43 |
jpl | jpl 2396 |   56   32   90 |   21   30  115 |   22   14   41 |

Table 5.0911.2   GPS week: 0911   Day: 2   MJD: 50623.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2397 |   62   32   80 |   28   23   84 |   26   12   50 |
emr | emr 2396 |   61   34   80 |   26   26   84 |   25   12   47 |
esa | esa 2081 |   61   35   77 |   31   23   85 |   28   18   56 |
gfz | gfz 1171 |   75   35   82 |   28   26  107 |   28   13   60 |
igr | igr 2391 |   63   32   78 |   27   22   84 |   24   12   52 |
igs | igs 2400 |   61   32   77 |   27   23   83 |   25   11   50 |
jpl | jpl 2389 |   62   31   78 |   27   23   85 |   25   11   51 |

Table 5.0911.3   GPS week: 0911   Day: 3   MJD: 50624.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   38   24   76 |   26   25   67 |   23   16   42 |
emr | emr 2301 |   36   25   76 |   27   27   76 |   27   15   45 |
esa | esa 1970 |   51   35   82 |   40   31   83 |   33   30   50 |
gfz | gfz 1188 |   36   25   66 |   28   22   67 |   23   14   38 |
igr | igr 2396 |   36   24   76 |   28   26   69 |   23   15   44 |
igs | igs 2400 |   36   24   73 |   27   26   69 |   25   15   42 |
jpl | jpl 2392 |   36   24   76 |   27   26   69 |   25   16   40 |

Table 5.0911.4   GPS week: 0911   Day: 4   MJD: 50625.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2382 |   43   28   63 |   26   22   68 |   26   15   38 |
emr | emr 2392 |   46   28   66 |   24   24   70 |   28   15   37 |
esa | esa 2301 |   47   28   68 |   36   27   85 |   28   23   46 |
gfz | gfz 1185 |   51   31   62 |   27   21   68 |   28   13   35 |
igr | igr 2399 |   44   27   64 |   26   23   71 |   28   15   37 |
igs | igs 2399 |   44   27   62 |   26   22   71 |   28   14   37 |
jpl | jpl 2385 |   44   28   62 |   25   22   68 |   28   16   37 |

Table 5.0911.5   GPS week: 0911   Day: 5   MJD: 50626.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2384 |   33   27   77 |   32   22   86 |   26   15   39 |
emr | emr 2395 |   33   27   78 |   30   25   90 |   28   14   39 |
esa | esa 1876 |   42   35   76 |   36   33  114 |   32   28   52 |
gfz | gfz 1194 |   28   23   68 |   31   21   82 |   27   16   39 |
igr | igr 2397 |   32   27   75 |   31   24   90 |   27   14   39 |
igs | igs 2397 |   31   26   71 |   32   24   91 |   28   15   39 |
jpl | jpl 2377 |   32   26   73 |   30   23   87 |   28   15   39 |

Table 5.0911.6   GPS week: 0911   Day: 6   MJD: 50627.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2321 |   56   26   75 |   28   20   72 |   31   18   35 |
emr | emr 2299 |   55   27   74 |   27   21   74 |   32   18   35 |
esa | esa 2171 |   39   30   66 |   33   28   82 |   35   25   47 |
gfz | gfz 1151 |   61   23   70 |   28   23   71 |   31   23   34 |
igr | igr 2160 |   61   32   83 |   30   28   88 |   34   23   40 |
igs | igs 2365 |   46   26   69 |   27   21   73 |   31   17   36 |
jpl | jpl 2324 |   50   23   71 |   27   21   70 |   31   18   34 |

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