[IGSREPORT-3831] Wk 0907 IGS Final Orbits

AC AC
Wed Jun 11 06:49:09 PDT 1997


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IGS Electronic Report    Wed Jun 11  6:49:09 PDT 1997      Message Number 3831
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0907 IGS Final Orbits

Final IGS Orbit Combination - Week 0907   (May 25, 1997 - May 31, 1997)

Contacts: J. Kouba (kouba at geod.emr.ca)
          Y. Mireault (mireault at geod.emr.ca), F. Lahaye (lahaye at geod.emr.ca)

COMBINATION STRATEGY:

For a complete description of combination strategy, please refer to the report
posted on CDDIS (IGS09077.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:

 IGS09070-6.SP3  IGS GPS ephemeris files for days 0-6, week 0907 in SP3 format.
 IGS09077.ERP    Earth Rotation Parameters (ERP) and their rates as well as
                 Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                 with IGS ephemerides.
 IGS09077.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. 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
                  ----+--------+---------------
                   0  |  ESA   |  ALL

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
                  ----+--------+---------------
                  1,6 |  EMR   |  ALL (High Rotations - 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 (May 26) | 00:00:00 |  19   |   All    | Modeling problems
          2 (May 27) | 00:00:00 |  14   |   All    | Modeling problems (a)
          3 (May 28) | 00:00:00 | 18,23 |   All    | Modeling problems
          6 (May 31) | 00:00:00 |   2   |   All    | Modeling problems


  (a) Due to unrealistic long arc RMS, PRN14 was excluded from the long arc 
      evaluation on day 1 for ACs that submitted solutions for this satellite;


9. Centre specific UT1-UTC values for ESA and NGS were not used in the long arc
   evaluation.  Smaller RMS were obtained when UT1-UTC values from Bulletin A
   were used.

10.SIO solutions were not used in the combination. SIO summary report was sent
   but the orbit and erp files could not be found at any of the Global Data 
   Centers (CDDIS, IGN and SCRIPPS).


ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS09077.SUM).


Table 1: Week 0907 summary.                       (May 25, 1997 - May 31, 1997)

Table 1.0907.a   GPS week: 0907   MJD: 50593.0-50599.0

         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 -.01  -.12   .03   .08  -.3  .06  .05 |    2.1   -2.6     .4
        | .00  .00  .01   .09   .15   .12   .1           |   12.0   18.5
emr  32 | .01 -.02  .00   .42   .06   .80   .0  .11  .10 |  197.2   47.9     .4
        | .01  .00  .00   .20   .12   .42   .1           |  257.5   39.0
esa  54 | .00  .01  .01  -.14  -.05   .00   .2  .09  .07 |    7.6  -66.8    1.7
        | .01  .00  .00   .10   .20   .13   .1           |   17.8   19.3
gfz  53 | .00  .00  .00  -.05   .08  -.20  -.1  .06  .06 |  275.3   68.8     .4
        | .00  .00  .00   .13   .09   .11   .0           |  237.7   16.3
igr  n/a| .00 -.02 -.01   .01  -.04  -.36  -.1  .08  .06 |    -.2    -.5     .5
        | .00  .01  .01   .16   .32   .16   .1           |    1.4    1.4
jpl  37 | .00  .01  .01   .01  -.15  -.06   .3  .06  .06 | -480.5   30.9     .3
        | .01  .00  .00   .11   .10   .09   .0           | 1823.4   76.7
ngs  52 | .01 -.05 -.01   .22   .35  -.08  -.2  .18  .16 |    2.3   -3.8   79.6
        | .01  .01  .01   .29   .32   .30   .3           |    7.2   13.2

Table 1.0907.b   GPS week : 0907   MJD: 50593.0-50599.0

         Satellite position sigmas for the combined orbits
         (coded in the IGS SP3 orbit files).
         "E" flags eclipsing satellites.
         Units: cm.

              Day of GPS week
 PRN  |   0   1   2   3   4   5   6 |  Remarks
------|-----------------------------|------------------------------------------
   1  |   3   3   3   5   3   3   3 |
   2E |   4   3   3   3   3   3   3 |
   3  |   3   3   3   3   2   3   3 |
   4E |   3   4   3   3   3   3   4 |
   5E |   3   3   3   3   3   3   3 |
   6  |   3   3   3   3   2   3   3 |
   7  |   3   3   3   3   3   3   3 |
   9  |   3   4   4   3   4   3   3 |
  10  |   3   2   3   3   2   2   3 |
  14  |   2  23   3   3   3   3   3 | Modeling problems on day 1.
  15E |   4   4   3   3   3   3   3 |
  16  |   3   3   3   4   3   3   3 |
  17E |   5   3   4   4   4   3   3 |
  18  |   4   3   7   4   2   3   5 |
  19  |  22   3   4   3   3   3   8 | Modeling problems on day 0.
  21  |   4   4   3   4   4   3   3 |
  22E |   3   3   3   4   3   3   4 |
  23  |   7   7   6   6   6   5   6 |
  24E |   3   4   4   4   3   3   4 |
  25  |   3   3   3   3   3   3   3 |
  26  |   5   4   3   3   3   3   4 |
  27  |   5   3   2   2   2   3   3 |
  29  |  13   8  13   4   3   2   3 | Modeling problems on days 0-2.
  30E |   4   3   3   4   4   4   4 |
  31  |   3   3   3   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 2.0907.0   GPS week: 0907   Day: 0   MJD: 50593.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .01 -.01  -.14  -.10  -.07  -.4  .06  .06 |    4.0  -23.5     .3
emr  34 | .03 -.02  .00   .60   .02   .93   .0  .11  .11 |  735.6   46.4     .3
esa  56 |-.01  .01  .01  -.08   .03   .04   .2  .11  .08 |   26.6  -54.3    3.7
gfz  54 | .00 -.01  .00  -.23   .20  -.20  -.1  .06  .06 |  736.9   47.1     .3
igr  n/a| .01 -.01 -.01  -.02   .00  -.11  -.1  .08  .05 |    -.1    -.2     .7
jpl  37 |-.01  .01  .01  -.05  -.17  -.17   .3  .07  .08 |-4608.0 -135.2     .2
ngs  54 | .00 -.05  .00   .69  -.07  -.37  -.2  .24  .19 |    7.0  -25.0   78.9

Table 2.0907.1   GPS week: 0907   Day: 1   MJD: 50594.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .00 -.01   .00   .02  -.03  -.3  .06  .05 |  -14.0   21.9     .4
emr  32 | .03 -.02 -.01   .01   .10  1.46   .1  .12  .12 |    5.5   93.1     .4
esa  57 | .00  .00  .01  -.30  -.45  -.04   .2  .09  .08 |  -13.3  -36.1     .7
gfz  54 | .00  .00  .00   .14   .18  -.02  -.1  .05  .05 |    6.9   93.7     .4
igr  n/a|-.01 -.03 -.01   .03  -.08  -.25   .1  .13  .08 |    1.0   -1.6     .7
jpl  37 | .00  .00  .00  -.01  -.05  -.01   .3  .07  .07 |   61.9   11.8     .4
ngs  51 | .02 -.04 -.01   .32   .36   .07   .1  .22  .16 |   -6.2    7.9   81.4

Table 2.0907.2   GPS week: 0907   Day: 2   MJD: 50595.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .01  .00  -.24  -.10   .14  -.1  .06  .05 |   25.9  -30.6     .4
emr  32 | .02 -.01 -.01   .45   .21   .33  -.2  .11  .11 |  106.0   51.9     .4
esa  54 | .00  .00  .01  -.10   .15  -.05   .3  .10  .09 |   12.8  -95.5     .6
gfz  53 |-.01  .00  .00  -.05   .02  -.14  -.1  .05  .05 |  107.9   51.7     .4
igr  n/a| .00 -.02  .00   .09  -.02  -.37   .0  .06  .05 |   -3.2    1.6     .6
jpl  37 | .01  .01  .00   .05  -.09  -.03   .3  .06  .06 |  107.6   51.8     .3
ngs  54 | .02 -.05 -.02   .22   .39   .11  -.6  .16  .15 |   15.7  -20.2   80.1

Table 2.0907.3   GPS week: 0907   Day: 3   MJD: 50596.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  83 | .00  .01 -.01  -.01  -.11   .25  -.3  .05  .05 |   -2.0    1.2     .4
emr  31 | .03 -.02  .00   .58   .12   .55   .1  .10  .10 |  157.1   75.3     .4
esa  55 |-.01  .01  .01  -.26  -.11  -.02   .2  .08  .07 |  -19.3  -71.2     .8
gfz  52 | .00  .00  .00   .01  -.03  -.37  -.1  .08  .08 |  158.6   75.7     .4
igr  n/a| .00 -.02 -.01  -.16   .42  -.28  -.1  .07  .06 |    1.3   -2.7     .6
jpl  37 | .01  .01  .00  -.12  -.04  -.11   .3  .05  .05 |  158.4   75.5     .3
ngs  50 | .00 -.06 -.01   .04   .94  -.17  -.6  .16  .17 |   -1.8    1.7   78.6

Table 2.0907.4   GPS week: 0907   Day: 4   MJD: 50597.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .01 -.01  -.08   .07   .11  -.4  .05  .05 |    1.4   -2.5     .4
emr  30 | .00 -.02  .00   .45   .08   .45   .1  .09  .09 |   41.0   -9.8     .4
esa  52 | .00  .01  .00  -.10  -.03   .26   .2  .08  .06 |    5.3  -75.5    1.7
gfz  53 | .00  .00  .00  -.09   .01  -.27  -.2  .05  .05 |  238.7   61.7     .4
igr  n/a| .00 -.02  .00  -.13   .19  -.44   .0  .04  .04 |     .1    -.1     .3
jpl  37 | .01  .01  .01  -.09  -.12  -.05   .3  .05  .05 |  238.6   61.6     .3
ngs  52 | .00 -.06 -.01   .43   .24  -.51  -.1  .15  .15 |    2.2    1.5   79.1

Table 2.0907.5   GPS week: 0907   Day: 5   MJD: 50598.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 |-.01  .01 -.01  -.15   .32  -.01  -.2  .04  .04 |   -2.6   10.2     .4
emr  33 | .00 -.02  .00   .32  -.17   .66   .0  .08  .08 |  299.9   76.7     .3
esa  53 | .00  .01  .00  -.14  -.09  -.08   .1  .08  .07 |   17.6  -57.5     .8
gfz  53 | .00  .00  .00  -.15   .12  -.19  -.1  .06  .06 |  301.4   77.2     .3
igr  n/a| .00 -.01 -.02   .32  -.60  -.57  -.2  .05  .05 |    -.2    -.2     .4
jpl  37 | .01  .01  .01   .11  -.24  -.12   .2  .04  .04 |  301.1   77.1     .2
ngs  54 | .01 -.05 -.03   .04   .08  -.08   .0  .16  .16 |   -1.5    7.4   78.8

Table 2.0907.6   GPS week: 0907   Day: 6   MJD: 50599.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  82 | .00  .00  .00  -.21   .10   .18  -.2  .04  .04 |    2.2    4.8     .4
emr  31 | .00 -.03 -.01   .50   .02  1.20  -.2  .12  .11 |   35.1    1.4     .4
esa  52 | .01  .00  .00  -.01   .14  -.12   .0  .09  .07 |   23.3  -77.7     .9
gfz  52 | .00  .00  .00   .05   .04  -.23  -.1  .06  .06 |  376.9   74.5     .4
igr  n/a| .00 -.03  .00  -.06  -.18  -.52   .0  .07  .07 |     .1    -.6     .5
jpl  37 | .00  .01  .00   .18  -.31   .09   .3  .05  .05 |  377.0   74.1     .3
ngs  52 |-.01 -.07 -.02  -.18   .51   .37   .1  .18  .18 |    1.1    -.3   80.1

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 3.0907.0   GPS week: 0907   Day: 0   MJD: 50593.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   6   8   8   4   4   5  18    3 |    8  12   9   9   9  10  14    8
   2E |   5  11  10   5   6   6  18    4 |   15  20  14  16  17  13  21   15
   3  |   5   9   9   3   3   5  18    3 |    3   9   8   4   7   5  15    4
   4E |   4   9   7   6   3   4  19    3 |    7  13  12   9  10   9  18    7
   5E |   5   9   7   4   4   3  24    3 |    6  11   9   7   8   7  16    6
   6  |   7   9   7   7   3   5  14    3 |    5  11   4   5   5   5  16    5
   7  |   4  10   7   5   4   5  20    3 |    4  12   5   6   6   5  17    5
   9  |   6  11   9   5   5   5  12    3 |    7  12   7   6   7   6  14    5
  10  |   4   7   6   6   4   4  15    3 |    5   9   6   6   7   4  12    4
  14  |   2  10   6   3   4   3  14    2 |    2   3   2   2   2   2   3    2
  15E |   5  14   9   6  11   6  20    4 |   13  17  16  11  13  11  25   11
  16  |   5  11   6   3   3   7  17    3 |    4   9   5   4   7   5  19    4
  17E |   5  19  14   6   8   3  22    5 |   10  21  10   9  10   8  25    9
  18  |   5  14   9  10   3   5  18    4 |    7  17   5   6   7   6  17    6
  19  |  17 --- --- ---  24  27  71   22 |    5 --- --- ---   5   6   3    3
  21  |   7   9  10   8   6   7  17    4 |    4  12   6   4   6   4  14    3
  22E |   5   6   9   7   6   4  11    3 |   10  14  13  14  16  13  16   12
  23  |   9  11  30   9  15   9  35    7 |   33  27  24  33  28  33  35   28
  24E |   5  10  11   6   5   5  14    3 |    5  13   7   6   7   7  14    6
  25  |   5   8   8   4   4   5  16    3 |    4   7   6   4   7   4  15    3
  26  |   6  15  16   7   3   4  20    5 |    8  18  11   9  12   9  15    8
  27  |   6  19  10   6   7   4  24    5 |    4  20   7   6   6   4  26    5
  29  | --- ---   8 ---   8 ---  21   13 |  --- ---   6 ---   7 ---  22    7
  30E |   8  11   9   6   3   3  26    4 |    6  13  11   7  10  10  24    7
  31  |   6   7   8   5   7   4  14    3 |    7   6  10   4   9   6  14    5
------|----------------------------------|----------------------------------
 RMS  |   6  11  11   6   8   7  24      |T   9  14   9  10  10   9  18    8
 WRMS |   6  11   8   6   5   8  19      |NE  9  13   8  10   9   9  17    8
 MEDI |   5  10   9   6   4   5  18      |MD  6  12   8   6   7   6  16    6

Table 3.0907.1   GPS week: 0907   Day: 1   MJD: 50594.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   6  10   8   3   4   4  11    3 |    8  11   6   9   7   6  13    6
   2E |   4  13   5   4   9   4  19    3 |   10  14   9  10  12  10  23   10
   3  |   4   8   8   4   5   5  15    3 |    3   8   6   5   7   5  14    4
   4E |   4  12  12   5   4   4  21    4 |    4  15   8   9   8   7  15    6
   5E |   3  13   7   4   8   6  16    3 |    6  10   9   6  10   7  18    6
   6  |   4   9   7   4   4   3  14    3 |    5   9   4   5   5   5  10    4
   7  |   5  17   6   5   6   3  15    3 |    4  15   4   4   5   4  14    3
   9  |   7   9  12   4   8   5  13    4 |    5  10   5  10   9   5  19    6
  10  |   3   9   5   4   7   4  13    2 |    5  12   4   7   8   4  14    6
  14  |  21 --- --- ---  49  26  75   23 |    0 --- --- ---   0   0   0  ---
  15E |   4  11   9   4   9   5  23    4 |    8  15   9  10  15  10  21    9
  16  |   4  18   5   5   9   7  14    3 |    6  17   6   6   9   5  12    4
  17E |   4  21   7   5  10   3  20    3 |    9  16   9  10  13   8  18    8
  18  |   5  14   5   5   6   6  11    3 |    9  17   4   9   9   8  14    7
  19  |   3 ---   9   4  12   4  13    3 |    9 ---  10   7  14   9  15    8
  21  |   6   6  10   5   6   6  14    4 |    4   7   4   5   5   4  14    3
  22E |   3   8   9   6   5   4  17    3 |    8  10  11  11  12   9  20    9
  23  |   8  11  25   8  15   7  20    7 |   53  54  35  51  53  51  49   48
  24E |   4  12   9   6   5   5  17    4 |    3  12   7   6   6   4  18    4
  25  |   4  12   7   4   9   5  14    3 |    4  14   9   4   8   4  14    4
  26  |   7   8  11   7   4   4  11    4 |    7   8   9   9   8   6  11    6
  27  |   4   9   4   3  10   3  16    3 |    2   7   6   4   9   4  14    2
  29  | --- ---   5 ---  15 ---  14    8 |  --- ---   5 ---  10 ---  13    6
  30E |   6   9   8   5   8   4  16    3 |    4  10   6   7   9   5  18    5
  31  |   4  11   5   4   6   4  18    3 |    4  10   7   6   7   5  17    5
------|----------------------------------|----------------------------------
 RMS  |   6  12   9   5  13   7  22      |T  12  16  10  12  14  12  18   11
 WRMS |   5  12   8   5   8   7  16      |NE 14  18  10  14  15  13  17   13
 MEDI |   4  11   8   4   8   4  15      |MD  5  12   7   7   9   5  15    6

Table 3.0907.2   GPS week: 0907   Day: 2   MJD: 50595.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   6   7   6   4   3   6  20    3 |    6  10  11   8  10   8  14    6
   2E |   4  13   9   5   5   4  14    3 |   10  16   8  10   9  10  19    9
   3  |   5   8   7   3   4   5  16    3 |    3   7   5   4   6   5  13    3
   4E |   6  11   6   5   5   5  17    3 |    3  13   6   7   9   7  20    5
   5E |   4  11   7   3   4   5  17    3 |    6  12   8   7   9   6  17    6
   6  |   5   9   6   5   2   3  11    3 |    3  10   5   3   4   6   8    3
   7  |   5   9   6   5   7   3  15    3 |    3  10   8   5   6   4  10    2
   9  |   7  16   7   8   3   5  18    4 |    4  15   9   5   6   5  15    4
  10  |   3  10   8   3   3   3  14    3 |    3  12   5   4   6   5  16    4
  14  |   4  12   6   3   5   5  14    3 |    5  11   4   4   6   4  14    4
  15E |   5   9   8   4   8   4  17    3 |    9  11  11  10  10   9  20    9
  16  |   4   8  12   3   6   7  13    3 |    4  10  10   6  10   6  15    5
  17E |   4  16  12   4   5   5  16    4 |    7  15  15   8  10   9  18    7
  18  |  16  18 ---   9  14  17  19    7 |   22  18 ---  13  11  25  19   14
  19  |   6  11  13   5   5   7  12    4 |    7  16   9  11   9   7  15    7
  21  |   9   9   8   6   5   7  11    3 |    4  11   6   5   7   8   9    4
  22E |   4  13   8   5   4   5  11    3 |    5  16   8   9   9   7  14    7
  23  |   6  14  27   7  12   7  26    6 |   51  46  33  51  47  50  50   47
  24E |   5  10  10   5   6   6  19    4 |    3   9   8   7   8   6  19    5
  25  |   4   7   8   3   4   5  13    3 |    3   9  10   5   7   5  15    4
  26  |   6   9  14   5   6   3  11    3 |    5  10  11   7  10   7  15    6
  27  |   4   8   7   4   4   5   8    2 |    2  11  10   5  11   3  13    4
  29  | --- ---   9 ---  10 ---  18   13 |  --- ---   5 ---   7 ---  19    8
  30E |   4  10   7   4   4   4  17    3 |    4  13   7   5   6   6  20    5
  31  |   6   6   7   5   3   3  10    3 |    3   9   7   6   8   4  15    4
------|----------------------------------|----------------------------------
 RMS  |   6  11  10   5   6   6  16      |T  12  15  10  12  12  12  18   11
 WRMS |   5  11   9   5   5   6  15      |NE 14  16  11  14  13  14  18   12
 MEDI |   5  10   8   5   5   5  15      |MD  4  11   8   7   9   6  15    5

Table 3.0907.3   GPS week: 0907   Day: 3   MJD: 50596.0

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

Table 3.0907.4   GPS week: 0907   Day: 4   MJD: 50597.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   5   8   5   7   4   7  11    3 |    5   9   8   7   7   7  10    5
   2E |   5   9   7   7   5   4  16    3 |   14  17  13  16  16  13  25   14
   3  |   4   6   5   3   3   4  13    2 |    3   8   6   5   6   6  13    4
   4E |   5   8   5   5   5   4  16    3 |    6   9   7   7   7   5  14    5
   5E |   4  12   6   5   5   4  21    3 |    6  14  10   7   9   7  23    7
   6  |   4   8   4   6   2   3  11    2 |    3   9   4   3   5   3  10    3
   7  |   5   7   5   8   4   4  11    3 |    4   7   6   5   5   3  11    3
   9  |   6  11   5   6   4   8  21    4 |    6  16   5   7   6   6  16    6
  10  |   3   8   5   3   3   4  13    2 |    4   8   5   6   4   4  12    3
  14  |   3  13   4   4   4   3  15    3 |    4   9   4   4   5   3  14    3
  15E |   5   9   5   4   5   4  16    3 |   12  14  12  12  12  12  23   11
  16  |   4   9   8   3   3   5  12    3 |    6   6   5   7   6   4  14    5
  17E |   5  15  12   5   5   3  16    4 |    8  18  10   8  10   7  20    8
  18  |   5   7   5   3   3   4   7    2 |    7   9   4   8   7   6  10    6
  19  |   6   7   6   4   3   4  13    3 |   11  15  10   6  12  12  18   11
  21  |   8   8   6   9   5   7  13    4 |    4   7   4   5   5   9  11    4
  22E |   4  10   7   6   4   4  13    3 |    7  16  11  10  11   8  16    8
  23  |   8  12  27   5   9   8  21    6 |   50  50  28  48  47  49  48   45
  24E |   5  11   5   6   6   5  18    3 |    6  11   4   6   6   4  17    5
  25  |   4   8  10   5   4   4   9    3 |    4  11  11   5   6   4  13    4
  26  |   7   8   6   5   4   3  14    3 |    5  11   9   7   7   5  12    5
  27  |   5   7   6   3   3   3   8    2 |    4   7   7   6   6   4  11    4
  29  |   4   8   9   4   2   3  21    3 |    5   5   6   5   5   4  20    4
  30E |   9  11  10   6   3   5  25    4 |    4  17   9  10   8   6  27    7
  31  |   6   6   5   3   4   4   9    2 |    4   9   5   4   5   4   8    3
------|----------------------------------|----------------------------------
 RMS  |   5   9   8   5   4   5  15      |T  11  15   9  12  12  11  18   10
 WRMS |   5   9   6   5   4   5  15      |NE 13  15   9  12  12  13  17   11
 MEDI |   5   8   6   5   4   4  13      |MD  5   9   7   7   6   6  14    5

Table 3.0907.5   GPS week: 0907   Day: 5   MJD: 50598.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   6   5   7   5   6   5  18    3 |    6   8  11   8  10   6  16    6
   2E |   5   9   5   7   5   3  16    3 |   20  23  17  21  20  21  24   19
   3  |   4   6   7   3   6   3  20    3 |    3   8   7   4   7   5  10    4
   4E |   4   6   7   5   5   3  17    3 |    5   8   6   8   6   5  17    5
   5E |   5  11   7   5   7   3  15    3 |    6  11   8   7  11   6  19    7
   6  |   3   6   4   8   4   4  11    3 |    3   7   4   6   7   4  13    4
   7  |   5   8   8   6   3   3  10    3 |    3   7   7   7   5   3   9    3
   9  |   4   9   3   6   3   6  11    3 |    5  12   5   5   8   7  16    5
  10  |   3   7   4   5   6   3  14    2 |    5   9   7   8   8   5  14    6
  14  |   3  11   4   5   4   3  15    3 |    3   7   5   4   5   4  16    3
  15E |   4   7   6   4   7   4  20    3 |   11  15  11  10  12  10  24   10
  16  |   5   9   9   4   5   5  12    3 |    3   7   5   4   6   4  13    3
  17E |   4  11   6   6   7   3  19    3 |   11  17  11  12  15  11  24   11
  18  |   3  10   7   8   6   3  10    3 |    6  12   7  10   8   7  16    8
  19  |   3   8   5   3   4   4  17    3 |   18  18  14   5  16  19  20   16
  21  |   6   4   6   8   5   5  19    3 |    5   8   6   6   5   5  15    4
  22E |   5   6   6   7   5   3  14    3 |   12  14  12  15  16  11  22   13
  23  |   6   9  20  10  10   4  22    5 |   56  56  37  54  52  53  50   51
  24E |   4   7   6   6   7   5  18    3 |    5   9   8   6   8   5  19    5
  25  |   5   6   5   6   5   4  18    3 |    4   8   7   7   9   3  17    5
  26  |   5   6  12   7   3   3  14    3 |    9  12   9  14  12   9  15   10
  27  |   4   7   8   5   4   3  14    3 |    3   7   9   5   6   5  15    4
  29  |   3   7   7   6   5   4   6    2 |    3   6   4   4   7   3  10    3
  30E |   6  18  10   4   6   4  13    4 |    4  19   8   6   9   5  17    5
  31  |   5   7   5   5   2   3  12    2 |    4   9   5   5   7   5  12    4
------|----------------------------------|----------------------------------
 RMS  |   4   8   8   6   5   4  16      |T  13  16  11  13  14  13  19   12
 WRMS |   4   8   7   6   5   4  16      |NE 14  16  11  14  14  14  18   13
 MEDI |   4   7   6   6   5   3  15      |MD  5   9   7   7   8   5  16    5

Table 3.0907.6   GPS week: 0907   Day: 6   MJD: 50599.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs  IGS |  cod emr esa gfz igr jpl ngs  IGS
------|----------------------------------|----------------------------------
   1  |   4   9   5   4   5   4  17    3 |    7  10   8   8   9   8  14    7
   2E |   4  12   7   6   9   5  17    3 |   22  21  23  23  23  23  21   22
   3  |   3  10   6   3   5   3  16    3 |    4   6   7   5   6   4  11    4
   4E |   4   9   8   7   6   4  24    4 |    6   9   8   8   8   6  23    6
   5E |   3  12   6   4   6   4  22    3 |    7  14   8   8  11   8  25    7
   6  |   4  10   4   9   6   5  15    3 |    4  10   5   5   7   5  12    4
   7  |   5  10   4   7   6   5  14    3 |    4   6   5   5   6   5  11    3
   9  |   4  10   6   7  10   4  17    3 |    7  11   7   6   7   8  17    5
  10  |   3  11   8   4   7   4  19    3 |    6  11   7   7  11   8  17    7
  14  |   3  14   4   3   6   3  17    3 |    4   8   5   3   6   4  14    2
  15E |   4  11   8   3   5   4  18    3 |   17  21  18  17  18  17  25   17
  16  |   5  11   8   6   5   4  16    3 |    4   8   5   5   8   4  15    3
  17E |   3  15   7   4  12   3  16    3 |   15  18  16  14  16  14  21   14
  18  |   3  10  15  12   5   6   9    5 |    8  11   6  11  13  12  12    8
  19  |   9  30  17 ---  12  16  22    8 |   26  41  16 ---  22  32  38   24
  21  |   4   6   4   9   6   6  13    3 |    4   7   6   6   7   5  12    4
  22E |   4  11  10  10   8   4  16    4 |   15  18  18  17  18  13  26   16
  23  |   7  13  21   5  14   7  26    6 |   43  40  32  39  40  43  50   39
  24E |   4  11   6   6   8   5  22    4 |    6   9   8   6   9   5  22    5
  25  |   4   8   7   5   7   3  14    3 |    4   9   6   7   9   4  13    4
  26  |   5   9  12   5   4   5  17    4 |    7  13  10   9  10   9  17    8
  27  |   4   9   8   5   6   4  15    3 |    4   7   9   5   8   5  14    4
  29  |   3  12   7   4   5   4  12    3 |    3   5   5   3   8   5  18    5
  30E |   5   8   7   7   6   6  25    4 |    5   9   6   6   8   6  21    4
  31  |   5  10   4   6   6   3  16    3 |    7   8   7   6   6   6  15    6
------|----------------------------------|----------------------------------
 RMS  |   4  12   9   6   7   5  18      |T  13  16  12  12  13  13  21   12
 WRMS |   4  11   7   6   7   5  18      |NE 13  16  10  11  13  14  20   12
 MEDI |   4  10   7   6   6   4  17      |MD  6  10   7   7   9   6  17    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 4.0907   GPS week: 0907   MJD: 50593.0-50599.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2353 |U  85   82  222 |U  30   25   66 |   25   17   44 |
emr | emr 2283 |   88   78  220 |   32   26   66 |U  26   17   45 |
esa | esa 1867 |  100   77  221 |U  33   24   67 |   31   23   54 |
gfz | gfz 1133 |   83   86  220 |U  30   30   71 |   29   18   51 |
igr | igr 2394 |   91   80  219 |   29   26   69 |   26   17   49 |
igs | igs 2357 |   88   80  220 |   29   25   65 |   25   16   44 |
jpl | jpl 2325 |U  89   80  220 |U  28   25   63 |   25   16   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 5.0907.0   GPS week: 0907   Day: 0   MJD: 50593.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2304 |   42   38   81 |   33   22   75 |   30   16   48 |
emr | emr 2108 |   44   46   84 |   38   21   71 |   30   15   52 |
esa | esa 1917 |   48   37   69 |   35   22   69 |   34   20   57 |
gfz | gfz 1082 |   44   50   96 |   31   19   53 |   36   20   53 |
igr | igr 2400 |   56   41   90 |   27   21   74 |   31   18   55 |
igs | igs 2304 |   42   39   82 |   30   22   73 |   31   15   49 |
jpl | jpl 2271 |   41   39   82 |   30   21   64 |   31   15   48 |

Table 5.0907.1   GPS week: 0907   Day: 1   MJD: 50594.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2302 |   39   26   87 |   27   33   68 |   26   17   47 |
emr | emr 2110 |   46   31   98 |   30   31   72 |   28   17   47 |
esa | esa 1882 |   38   30   86 |   31   28   66 |   34   27   56 |
gfz | gfz 1088 |   41   32   99 |   25   33   70 |   32   17   53 |
igr | igr 2389 |   48   32   95 |   28   36   82 |   27   17   50 |
igs | igs 2303 |   38   27   87 |   26   33   68 |   26   16   46 |
jpl | jpl 2271 |   39   28   88 |   26   34   68 |   25   14   43 |

Table 5.0907.2   GPS week: 0907   Day: 2   MJD: 50595.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2271 |   44   27   91 |   35   27   64 |   24   15   48 |
emr | emr 2289 |   46   28  101 |   34   28   64 |   26   15   48 |
esa | esa 1755 |   42   30   87 |   36   25   66 |   41   23   62 |
gfz | gfz 1130 |   44   27   94 |   30   40   91 |   26   15   48 |
igr | igr 2381 |   48   36  109 |   35   30   72 |   22   16   51 |
igs | igs 2292 |   43   27   93 |   34   27   63 |   24   14   47 |
jpl | jpl 2260 |   44   27   96 |   27   28   66 |   24   14   47 |

Table 5.0907.3   GPS week: 0907   Day: 3   MJD: 50596.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2397 |   61   26   85 |   33   23   80 |   27   26   47 |
emr | emr 2301 |   66   26   89 |   34   28   80 |   28   26   46 |
esa | esa 1915 |   64   26   84 |   37   23   83 |   26   32   55 |
gfz | gfz 1136 |   80   28   85 |   39   28   91 |   28   24   49 |
igr | igr 2395 |   71   31   98 |   34   24   79 |   25   25   49 |
igs | igs 2399 |   62   26   87 |   32   23   78 |   24   24   47 |
jpl | jpl 2367 |   64   27   89 |   32   23   77 |   25   24   46 |

Table 5.0907.4   GPS week: 0907   Day: 4   MJD: 50597.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   62   28   84 |   27   24   60 |   21   16   36 |
emr | emr 2399 |   63   30   90 |   25   23   57 |   22   15   35 |
esa | esa 1851 |   65   32   79 |   30   22   63 |   24   18   44 |
gfz | gfz 1177 |   76   28   91 |   26   26   56 |   23   18   45 |
igr | igr 2400 |   62   28   88 |   24   23   59 |   20   15   37 |
igs | igs 2400 |   62   28   85 |   25   23   57 |   22   15   36 |
jpl | jpl 2368 |   63   28   87 |   23   22   54 |   21   16   34 |

Table 5.0907.5   GPS week: 0907   Day: 5   MJD: 50598.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |  190  204  550 |   28   24   54 |   24   14   39 |
emr | emr 2398 |  197  191  539 |   30   25   55 |   24   12   40 |
esa | esa 1925 |  234  188  550 |   30   26   59 |   28   16   51 |
gfz | gfz 1179 |  170  213  538 |   32   31   68 |   27   17   53 |
igr | igr 2399 |  200  196  530 |   28   24   54 |   25   15   43 |
igs | igs 2400 |  199  199  542 |   28   25   54 |   24   13   40 |
jpl | jpl 2367 |  202  198  540 |   27   25   53 |   24   12   38 |

Table 5.0907.6   GPS week: 0907   Day: 6   MJD: 50599.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   38   27   80 |   28   21   59 |   22   12   44 |
emr | emr 2377 |   37   28   83 |   28   22   59 |   24   12   43 |
esa | esa 1825 |   39   31   87 |   33   24   62 |   26   20   50 |
gfz | gfz 1142 |   46   27   83 |   26   25   59 |   28   17   54 |
igr | igr 2396 |   37   27   85 |   26   21   57 |   27   13   54 |
igs | igs 2400 |   36   27   81 |   28   21   59 |   23   12   45 |
jpl | jpl 2368 |   40   28   82 |   27   21   56 |   22   12   46 |


[Mailed From: Yves Mireault <mireault at geod.emr.ca>]



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