Subject: [IGSREPORT-3750] Wk 0904 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Fri, 16 May 1997 19:11:41 PDT

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IGS Electronic Report    Fri May 16 19:11:41 PDT 1997      Message Number 3750
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0904 IGS Final Orbits

Final IGS Orbit Combination - Week 0904   (May 04, 1997 - May 10, 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 (IGS09047.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 and Springer, 1995, Combining the orbits of the IGS Analysis
   Centers, Bulletin Geodesique, 69, pp 200-222.

   Kouba, Mireault and 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.

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:

 IGS09040-6.SP3  IGS GPS ephemeris files for days 0-6, week 0904 in SP3 format.
 IGS09047.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS09047.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. Higher clock RMS for NGS on day 3 were caused by clock jumps on PRN24.

7. 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
         ------------+----------+-------+----------+-------------------
          3 (May 07) | 00:00:00 |9,10,26|   All    | Modeling problems
          6 (May 10) | 00:00:00 |  19   |   All    | Modeling problems

8. Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
   Final IGS solutions. The LOD combination uses AC LOD and AC orbit weights
   (for the time being) to determine combined IGS LOD values together with 
   integrated UT1-UTC values starting from the most current (and non predicted)
   UT1-UTC value of Bulletin A.

   AC LOD biases with respect to Bulletin A are estimated using Bulletin A
   most recent 3 weeks (21 days), i.e. up to the most current (and non
   predicted) UT1-UTC value 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.

9. PRN28 was included in the Final combinations on days 0-1 of this week.
   Note that PRN28 was set unusable starting on GPS Wk 0878 day 1 (Nov 04, 1996)
   at 16:34 until further notice (ref. NANU 179-96309). 
   Note also that PRN28 has less tracking than other satellites and may have
   modeling problems from time to time. Finally, only COD and SIO submitted Final
   solutions for PRN28. For all these reasons, PRN28 should be used with caution 
   on these days.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS09047.SUM).

Table 1: Week 0904 summary.                       (May 04, 1997 - May 10, 1997)

Table 1.0904.a   GPS week: 0904   MJD: 50572.0-50578.0

         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  82 | .00  .01 -.02   .05   .17   .37  -.2  .06  .04 |   -2.7    2.9     .4
        | .00  .01  .00   .09   .10   .20   .1           |   11.7   22.1
emr  30 | .01 -.01 -.01   .46   .01   .46  -.1  .11  .11 |  116.1   37.1     .4
        | .01  .00  .00   .11   .11   .33   .1           |  108.2   43.8
esa  54 | .00  .01  .00  -.10  -.09  -.08   .2  .07  .07 |   -1.4  -25.5    1.1
        | .01  .00  .00   .13   .12   .12   .1           |   14.8   16.3
gfz  53 | .00  .00  .01   .00  -.02  -.19  -.2  .06  .06 |   69.8   33.2     .5
        | .00  .00  .00   .12   .08   .09   .0           |  168.1   69.1
igr  n/a| .01 -.02  .00   .01   .17  -.10   .0  .07  .05 |     .3   -1.1     .7
        | .01  .01  .00   .08   .08   .14   .1           |    1.0    1.9
jpl  37 | .00  .01  .01  -.04  -.04  -.03   .4  .06  .06 |  235.8   29.5     .4
        | .00  .00  .00   .10   .06   .08   .1           |  365.6   45.9
ngs  51 | .01 -.05  .01  -.08   .17  -.06  -.2  .15  .15 |  149.4 -247.2 6584.6
        | .01  .01  .01   .42   .10   .30   .2           |  398.9  657.1
sio  115| .00  .00  .01  -.08  -.16  -.18  -.1  .07  .06 |     .0     .0     .0
        | .00  .00  .00   .14   .08   .35   .1           |     .0     .0

Table 1.0904.b   GPS week : 0904   MJD: 50572.0-50578.0

         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   2   2   3 |
   2  |   3   3   3   3   3   2   3 |
   3  |   2   2   2   2   2   2   2 |
   4E |   3   3   4   3   3   3   4 |
   5  |   3   2   2   2   2   2   3 |
   6  |   3   3   3   3   2   2   3 |
   7  |   3   3   2   2   2   2   3 |
   9  |   2   2   3   3   2   2   3 |
  10  |   2   2   3   3   3   2   3 |
  14  |   2   3   3   2   2   2   2 |
  15E |   4   3   3   3   3   3   4 |
  16  |   5   3   2   2   2   2   2 |
  17E |   3   3   3   3   4   3   4 |
  18  |   2   2   3   3   2   2   3 |
  19  |   3   3   3   3   2   3  23 | Modeling problems on day 6.
  21  |   2   2   3   3   3   3   4 |
  22  |   2   2   2   3   3   2   3 |
  23  |   2   2   3   3   2   2   3 |
  24E |   3   4   4   3   3   4   4 |
  25  |   2   2   2   2   2   2   2 |
  26  |   3   3   3   3   3   2   3 |
  27  |   2   2   3   2   2   2   3 |
  28  |   5   7 --- --- --- --- --- | See Remark 9.
  29  |   2   2   2   2   2   2   2 |
  30  |   2   2   3   2   3   2   3 |
  31  |   2   2   2   2   2   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 2.0904.0   GPS week: 0904   Day: 0   MJD: 50572.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .02 -.02   .17   .35   .64  -.2  .05  .04 |   -3.6    5.7     .4
emr  30 | .00 -.02  .00   .30  -.20   .57  -.1  .11  .11 |   45.6    8.4     .4
esa  55 | .00  .01 -.01   .14  -.05   .03   .0  .07  .07 |    3.0  -30.4    1.1
gfz  54 | .00  .00  .01  -.03  -.12  -.17  -.1  .05  .05 | -115.4  -51.0     .4
igr  n/a| .00 -.02  .00   .04   .03  -.12   .1  .06  .05 |    2.0   -4.8     .5
jpl  37 | .00  .01  .01  -.04  -.02  -.01   .4  .05  .05 | -204.8   10.8     .3
ngs  50 | .00 -.05  .01  -.12   .23  -.11   .0  .14  .13 |    -.9    8.0   78.4
sio  117| .00  .00  .00  -.24  -.17  -.60  -.1  .05  .05 |     .0     .0     .0

Table 2.0904.1   GPS week: 0904   Day: 1   MJD: 50573.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .01 -.02   .10   .10   .43  -.2  .05  .04 |    4.8  -23.2     .4
emr  30 | .01 -.02 -.01   .40   .10   .96  -.2  .09  .09 |   24.9  -40.2     .5
esa  53 | .01  .01  .00  -.15  -.05   .05   .1  .07  .07 |     .8  -45.4    1.9
gfz  54 |-.01  .00  .01   .10  -.09  -.18  -.1  .06  .06 | -163.6  -77.9     .5
igr  n/a| .01 -.01  .00  -.10   .22  -.30   .0  .05  .04 |    -.1    -.4     .4
jpl  37 | .00  .00  .01   .01  -.06  -.03   .5  .05  .05 | -189.5  -17.9     .4
ngs  51 | .01 -.04  .01  -.24   .30   .48  -.2  .15  .14 |    6.8  -23.3   79.9
sio  115| .00  .00  .00  -.24  -.07  -.68  -.1  .05  .05 |     .0     .0     .0

Table 2.0904.2   GPS week: 0904   Day: 2   MJD: 50574.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .00 -.01  -.07   .13   .59  -.2  .05  .04 |  -16.0   28.2     .4
emr  31 | .01 -.01 -.01   .55   .04   .08   .0  .11  .11 |  -12.1   26.5     .4
esa  53 | .00  .01  .00  -.07  -.14  -.08   .1  .07  .07 |  -22.7  -11.8     .8
gfz  54 | .00  .00  .01   .20   .05  -.05  -.1  .05  .05 |    8.5   91.3     .4
igr  n/a| .01 -.02  .00  -.01   .20  -.20  -.1  .05  .04 |     .4    -.8     .3
jpl  37 | .00  .01  .00  -.16  -.08  -.05   .3  .05  .05 |  682.7   19.1     .3
ngs  51 | .01 -.04  .02  -.91   .03  -.37   .1  .17  .16 |   -1.3    3.6   80.1
sio  114| .00  .00  .01   .04  -.11  -.23  -.2  .06  .05 |     .0     .0     .0

Table 2.0904.3   GPS week: 0904   Day: 3   MJD: 50575.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .01 -.01  -.05   .25   .34  -.3  .05  .05 |   18.5  -28.5     .5
emr  31 | .02 -.01  .00   .46  -.04   .16   .1  .12  .12 |   98.9   43.9     .4
esa  54 | .00  .01  .00  -.11  -.27  -.16   .2  .07  .07 |   -9.5  -44.4     .8
gfz  53 | .00  .00  .01  -.06   .12  -.28  -.1  .05  .05 |   99.9   45.3     .4
igr  n/a| .01 -.02  .00   .09   .19  -.06   .1  .05  .05 |   -1.1    1.1     .6
jpl  37 |-.01  .01  .00  -.12  -.11  -.06   .4  .05  .05 |  702.6  -28.7     .3
ngs  48 | .03 -.05  .01   .34   .12   .14  -.3  .14  .15 | 1054.0-1737.017420.0
sio  116|-.01  .00  .01   .13  -.14   .05  -.2  .06  .06 |     .0     .0     .0

Table 2.0904.4   GPS week: 0904   Day: 4   MJD: 50576.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .01 -.02   .12   .18   .23  -.3  .04  .04 |   -6.2   15.0     .3
emr  30 | .01 -.01 -.01   .38   .00   .77   .0  .11  .11 |  148.6   78.7     .4
esa  55 | .01  .01  .01  -.26  -.19  -.27   .3  .06  .06 |   15.1  -15.3     .9
gfz  53 | .00  .00  .01  -.03  -.07  -.30  -.1  .06  .06 |  149.6   80.0     .4
igr  n/a| .01 -.02  .00  -.01   .16  -.14   .0  .05  .05 |     .8   -2.0     .3
jpl  37 | .00  .00  .01   .05   .00  -.14   .3  .04  .04 |  149.8   79.4     .3
ngs  54 | .02 -.05  .00  -.01   .28  -.05  -.4  .13  .13 |    -.9    1.2   81.4
sio  117|-.01 -.01  .01  -.07  -.21   .25  -.2  .06  .05 |     .0     .0     .0

Table 2.0904.5   GPS week: 0904   Day: 5   MJD: 50577.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .00 -.02   .07   .15   .26  -.3  .04  .04 |   -2.4   -1.2     .3
emr  29 | .01 -.01 -.02   .61   .12   .20  -.2  .11  .11 |  227.7   55.8     .4
esa  55 | .01  .01  .00  -.04  -.03  -.17   .2  .06  .06 |  -13.6  -28.0     .8
gfz  53 | .00 -.01  .00  -.05  -.04  -.21  -.2  .05  .05 |  228.9   56.7     .4
igr  n/a| .01 -.03  .01   .13   .28   .08   .0  .05  .05 |     .2    -.7     .3
jpl  37 | .00  .01  .01  -.14  -.09  -.03   .3  .04  .04 |  228.9   56.3     .2
ngs  52 | .02 -.05  .01   .19   .16  -.16  -.3  .14  .14 |   -2.0    1.2   79.6
sio  113| .00  .00  .01  -.06  -.13   .06   .0  .06  .06 |     .0     .0     .0

Table 2.0904.6   GPS week: 0904   Day: 6   MJD: 50578.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .01 -.02   .00   .05   .10  -.2  .10  .05 |  -14.0   24.4     .7
emr  32 | .01 -.01 -.01   .51   .04   .50  -.1  .11  .11 |  279.6   86.6     .5
esa  54 |-.01  .01  .00  -.24   .09   .02   .3  .07  .07 |   17.3   -2.8    1.0
gfz  52 |-.01  .00  .01  -.15   .02  -.11  -.2  .11  .11 |  280.8   87.8     .7
igr  n/a| .01 -.03  .00  -.06   .11   .05  -.3  .13  .09 |     .0     .2    1.4
jpl  37 | .00  .01  .01   .09   .05   .14   .5  .10  .10 |  280.7   87.3     .6
ngs  52 | .01 -.04  .01   .19   .07  -.36  -.1  .16  .18 |   -9.6   16.2   78.5
sio  112| .00  .00  .01  -.14  -.30  -.10  -.2  .13  .09 |     .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 3.0904.0   GPS week: 0904   Day: 0   MJD: 50572.0

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

Table 3.0904.1   GPS week: 0904   Day: 1   MJD: 50573.0

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

Table 3.0904.2   GPS week: 0904   Day: 2   MJD: 50574.0

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

Table 3.0904.3   GPS week: 0904   Day: 3   MJD: 50575.0

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

Table 3.0904.4   GPS week: 0904   Day: 4   MJD: 50576.0

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

Table 3.0904.5   GPS week: 0904   Day: 5   MJD: 50577.0

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

Table 3.0904.6   GPS week: 0904   Day: 6   MJD: 50578.0

               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   8   5   5   5   9   7    3 |    8   9  10   8   8   8  17   9    7
   2  |   4  12   7   4   8   4  10  10    3 |    4   9   6   6   7   6  19  11    5
   3  |   4   6   4   3   7   5  11   8    2 |    6   7   6   4   9   7  18   8    5
   4E |   6  19   8   7  14   4  14   6    4 |   11  15  12  11  21  11  25  13   11
   5  |   4   9   8   3   8   6  13   9    3 |    3   9   6   4   8   5  17   9    4
   6  |   6  10   7   5   7   5   9   9    3 |    5  10   4   5   6   6  19  10    4
   7  |   4   8   8   5   5   3   9   9    3 |    6   7   6   7   8   6  16  12    5
   9  |   7   9   6   7   8   5  16   8    3 |    4  10   5   5   9   7  17   8    5
  10  |   6   9   9   5   6   7  13  11    3 |    2   9   4   3   6   4  11  10    3
  14  |   4   9   5   3   9   4   9   8    2 |    6  10   9   8   9   7  18  14    8
  15E |   8  17   7   4  11   4  16  11    4 |   10  14  10  11  17  10  26  12   10
  16  |   5   6   5   4   8   4  12   8    2 |    7  10   7   8  11   8  18  13    7
  17E |   6  21   6   5  10   5  22   8    4 |   12  15  10  12  12  11  23  15   11
  18  |   5   9   5   6   7   5   8  15    3 |    9  13   9   9  12   9  22  21    9
  19  |  40 --- ---  49  50  43  52  44   23 |   14 --- ---   3   2  49   6  21   17
  21  |   7   6   7   9   7  11  14   7    4 |    4   8   6   6   7   8  19   9    4
  22  |   4   8   5   4   6   7  11  10    3 |    5   8   7   6   9   5  17  10    4
  23  |   5   9   6   5   8   6  10   8    3 |   12  12  13  12  12  13  21  17   12
  24E |   6  20   5   4  13   4  16   9    4 |   16  19  15  17  20  16  22  16   16
  25  |   5   7   6   5   6   5  10   6    2 |    6   8   6   7  10   5  19   8    5
  26  |   6   8   9   5   5   5   7  10    3 |    3   8   5   4   6   5   8  10    4
  27  |   4  12  11   5   9   4  10  11    3 |    6  10   8   5  10   6  20  11    5
  29  |   4   6   8   5   8   6   8   6    2 |    7   8   8   8   9   7  18  11    7
  30  |   5   7   7   4   8   5  17   7    3 |    4   9   6   6  10   5  21  10    5
  31  |   5   6   8   6   6   4  14  14    3 |    7   8   6   4   8   6  18  13    5
------|--------------------------------------|--------------------------------------
 RMS  |  10  11   7  11  13  10  16  13      |T   7  10   8   7  10  12  18  12    8
 WRMS |   5  11   7  11   9  10  18   9      |NE  6   9   7   6   8  12  17  12    6
 MEDI |   5   9   7   5   8   5  11   9      |MD  6   9   7   6   9   7  18  11    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 4.0904   GPS week: 0904   MJD: 50572.0-50578.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2419 |U  42   29   75 |U  34   25   64 |   27   15   42 |
emr | emr 2365 |   42   31   77 |   35   25   62 |U  27   14   43 |
esa | esa 2089 |   47   30   85 |U  40   25   68 |   31   18   48 |
gfz | gfz 1175 |   46   31   86 |U  37   33   60 |   29   17   46 |
igr | igr 2395 |   42   29   77 |   35   26   64 |   28   14   42 |
igs | igs 2421 |   42   29   75 |   34   25   63 |   27   14   43 |
jpl | jpl 2382 |   42   30   75 |U  34   25   63 |   28   14   43 |

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 5.0904.0   GPS week: 0904   Day: 0   MJD: 50572.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2481 |   57   30  106 |   36   22   51 |   23   14   42 |
emr | emr 2387 |   56   31  105 |   37   22   52 |   23   13   42 |
esa | esa 2049 |   63   31  107 |   40   25   59 |   28   21   44 |
gfz | gfz 1187 |   71   31  127 |   33   26   50 |   26   19   49 |
igr | igr 2397 |   57   28  104 |   39   22   50 |   25   13   40 |
igs | igs 2481 |   57   30  105 |   37   24   53 |   25   14   43 |
jpl | jpl 2382 |   56   30  107 |   36   23   50 |   25   13   41 |

Table 5.0904.1   GPS week: 0904   Day: 1   MJD: 50573.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2476 |   34   26   67 |   26   28   54 |   26   13   38 |
emr | emr 2391 |   35   28   71 |   27   30   50 |   28   13   43 |
esa | esa 2102 |   44   27   90 |   31   18   61 |   30   17   46 |
gfz | gfz 1189 |   36   26   72 |   28   40   60 |   32   14   37 |
igr | igr 2398 |   35   26   70 |   24   28   53 |   28   12   42 |
igs | igs 2476 |   34   26   70 |   26   28   52 |   28   12   40 |
jpl | jpl 2384 |   34   26   69 |   25   30   51 |   28   11   40 |

Table 5.0904.2   GPS week: 0904   Day: 2   MJD: 50574.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2378 |   53   35   95 |   24   24   66 |   27   15   47 |
emr | emr 2379 |   54   37   95 |   27   23   66 |   28   17   49 |
esa | esa 1988 |   56   37  101 |   34   20   72 |   34   18   45 |
gfz | gfz 1087 |   57   37  111 |   24   21   53 |   27   17   47 |
igr | igr 2388 |   53   36   95 |   27   23   69 |   28   16   47 |
igs | igs 2388 |   52   36   94 |   26   23   67 |   27   15   46 |
jpl | jpl 2372 |   52   37   92 |   25   24   67 |   28   15   49 |

Table 5.0904.3   GPS week: 0904   Day: 3   MJD: 50575.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   32   34   59 |   34   23   71 |   28   13   37 |
emr | emr 2399 |   31   35   61 |   33   23   69 |   27   12   40 |
esa | esa 2154 |   32   35   78 |   36   24   77 |   30   17   47 |
gfz | gfz 1191 |   33   42   59 |   34   34   70 |   26   17   35 |
igr | igr 2391 |   35   34   68 |   36   24   75 |   27   14   36 |
igs | igs 2400 |   31   34   62 |   33   23   71 |   27   13   37 |
jpl | jpl 2384 |   32   35   59 |   33   23   71 |   28   13   38 |

Table 5.0904.4   GPS week: 0904   Day: 4   MJD: 50576.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   39   26   52 |   27   23   74 |   28   19   44 |
emr | emr 2398 |   37   27   54 |   26   24   70 |   30   19   44 |
esa | esa 2135 |   42   28   67 |   39   27   74 |   32   19   47 |
gfz | gfz 1191 |   35   28   61 |   28   32   73 |   28   24   44 |
igr | igr 2400 |   38   25   53 |   27   24   70 |   30   18   44 |
igs | igs 2400 |   38   26   53 |   28   24   70 |   30   18   44 |
jpl | jpl 2384 |   37   25   51 |   27   23   74 |   30   18   44 |

Table 5.0904.5   GPS week: 0904   Day: 5   MJD: 50577.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   35   26   62 |   54   31   65 |   26   12   41 |
emr | emr 2395 |   36   27   65 |   55   33   66 |   27   12   39 |
esa | esa 2137 |   37   26   71 |   63   35   67 |   28   22   53 |
gfz | gfz 1190 |   37   25   69 |   67   42   52 |   27   14   47 |
igr | igr 2399 |   35   25   63 |   54   31   61 |   28   11   42 |
igs | igs 2400 |   35   26   62 |   55   31   63 |   27   12   42 |
jpl | jpl 2384 |   34   26   62 |   54   31   64 |   27   12   42 |

Table 5.0904.6   GPS week: 0904   Day: 6   MJD: 50578.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   39   25   67 |   24   20   65 |   28   15   46 |
emr | emr 2208 |   40   28   71 |   27   21   59 |   28   12   44 |
esa | esa 2056 |   46   25   73 |   27   22   67 |   33   14   53 |
gfz | gfz 1190 |   36   26   76 |   26   28   57 |   32   15   56 |
igr | igr 2391 |   35   28   71 |   26   27   63 |   28   15   45 |
igs | igs 2400 |   39   25   68 |   24   21   63 |   28   13   45 |
jpl | jpl 2384 |   38   27   69 |   25   22   63 |   28   13   45 |

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