Subject: [IGSREPORT-2956] Wk 0868 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 9 Sep 1996 10:58:25 PDT

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IGS Electronic Report    Mon Sep  9 10:58:25 PDT 1996      Message Number 2956
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0868 IGS Final Orbits

Final IGS Orbit Combination - Week 0868   (Aug 25, 1996 - Aug 31, 1996)

Contacts: J. Kouba ([email-masked])
          Y. Mireault ([email-masked]), F. Lahaye ([email-masked])

COMBINATION STRATEGY:

For a complete description of combination strategy, please refer to the report
posted on CDDIS (IGS08687.SUM).

SOFTWARE:

  The weighted average software used was developed by T. Springer and
G. Beutler during 1993. The GPS long arc orbit analysis software used here for
individual centre ephemeris evaluation was developed by Beutler et al. at the
Astronomical Institute of the University of Bern (AIUB). For more details on
the orbit combination and complete references for both software see:

   Beutler, Kouba, Springer, 1993, Combining orbits of the IGS processing
   centres, in IGS Analysis Centre Workshop, October 12-14, Ottawa, pp 19-55.

PRODUCTS GENERATED:

  The resulting average ephemeris and clocks are output to daily files in SP3
format. The satellite accuracy codes displayed in the header are based on the
weighted RMS for each satellite. Note that each file contains all the
satellites that appear in any of the centre ephemeris files. If a satellite or
centre was excluded from combination, a note in the REMARKS section of this
report will identify the exclusion and the reason.

  The resulting x and y earth rotation parameters (ERP) associated with the IGS
ephemeris files and their rates (xrt, yrt) are computed using a weighted average
of all available centres (weights are those from the orbit combination). 
Pole rate combination uses only centres providing estimated pole rates.
These values are supplemented with the current IERS Bulletin A UT1-UTC values. 

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

 IGS08680-6.SP3  IGS GPS ephemeris files for days 0-6, week 0868 in SP3 format.
 IGS08687.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08687.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 28 

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

                  Day | Centre | PRN list
                  ----+--------+---------------
                   2  |  ESA   |  18 19 27
                   6  |  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
                  ----+--------+---------------
                   3  |  ESA   |  14

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

          Day (Date) |   TIME   |  PRN  | Centres  | Reason
         ------------+----------+-------+------------------------------
          1 (Aug 26) | 00:00:00 |  23   |   ALL    | Modeling problems
          4 (Aug 29) | 00:00:00 |7,14,18|   ALL    | Modeling problems (a)
          5 (Aug 30) | 12:00:00 |   3   |   ALL    | Modeling problems
          5 (Aug 30) | 00:00:00 |  16   |   ALL    | Modeling problems

  (a) Due to unrealistic long arc RMS, PRN14 was excluded from the long arc
      evaluation on days 3 and 6 for ACs that submitted solutions for this
      satellite;

      Due to unrealistic long arc RMS, PRN18 was excluded from the long arc
      evaluation on day 4 for ACs that submitted solutions for this satellite;

9. Starting with GPS wk 0866, the subdaily polar motion (Ray Model for diurnal/
   subdiurnal tides) was implemented in the Long Arc (LA) evaluation.
   This resulted in decreased LA RMS (by about 1 cm) of a seven-day arc.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08687.SUM).

Table 1: Week 0868 summary.                       (Aug 25, 1996 - Aug 31, 1996)

Table 1.0868.a   GPS week: 0868   MJD: 50320.0-50326.0

         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  77 | .00  .01  .00  -.19  -.07   .06   .0  .07  .06 |    -.2   -7.4    1.3
        | .00  .00  .01   .07   .07   .28   .1           |    5.8    8.8
emr  31 | .00  .01 -.01   .08   .02   .39  -.2  .10  .09 |  100.0   20.2     .6
        | .00  .01  .00   .14   .12   .26   .1           |   54.0   16.2
esa  56 | .00  .00  .00   .27  -.02   .53   .1  .19  .09 |   -4.2   12.4   10.3
        | .01  .01  .01   .18   .29   .12   .1           |   23.5   10.2
gfz  47 | .00 -.03  .01   .15   .05  -.29  -.1  .08  .07 |  100.0   19.5     .5
        | .01  .00  .01   .14   .06   .11   .1           |   53.9   16.4
igr  n/a| .00  .00  .00  -.17  -.13  -.09  -.1  .08  .06 |    -.3     .6     .6
        | .01  .01  .01   .20   .14   .16   .2           |    1.4    1.7
jpl  37 | .00  .02  .00  -.11  -.16  -.03   .2  .08  .08 |  100.0   14.2     .5
        | .00  .00  .00   .10   .07   .09   .1           | 1862.0   17.1
ngs  49 | .01 -.05  .00   .07   .25  -.16   .1  .17  .17 |    -.2   -4.0   83.6
        | .01  .02  .01   .28   .23   .31   .1           |    5.8    9.8
sio  118|-.01  .02 -.01  -.10   .16  -.37   .0  .10  .10 |     .0     .0     .0
        | .00  .01  .01   .16   .09   .44   .1           |     .0     .0

Table 1.0868.b   GPS week : 0868   MJD: 50320.0-50326.0

         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
------|-----------------------------|------------------------------------------
   1E |   3   3   4   3   4   4   4 |
   2  |   3   3   3   3   3   3   3 |
   3E |   5   4   5   5   5  11   5 | Modeling problems on day 5.
   4  |   2   2   3   3   3   4   3 |
   5  |   3   3   3   3   3   3   3 |
   6E |   4   5   4   3   4   4   4 |
   7E |   4   3   4   4   4   4   5 |
   9  |   3   3   3   3   3   2   3 |
  10  |   3   4   4   3   4   4   3 |
  14  |   3   3   3  13   3  12   4 | Modeling problems on days 3 and 5.
  15  |   3   2   3   4   3   3   3 |
  16  |   3   3   3   3   3   4   4 |
  17  |   2   2   3   3   3   2   3 |
  18E |   4   3   3   3  22   5   4 | Modeling problems on day 4.
  19  |   3   2   3   3   4   3   3 |
  21  |   3   3   3   3   3   3   3 |
  22  |   3   3   3   4   3   3   3 |
  23  |   4   7   6   5   6   6   7 |
  24  |   2   3   2   2   3   3   3 |
  25  |   3   3   3   3   3   3   3 |
  26E |   4   3   3   4   4   4   5 |
  27  |   3   3   3   2   3   3   3 |
  28E |   4   4   5   4   4   5   5 |
  29E |   3   3   3   4   4   4   4 |
  31E |   4   4   4   5   4   5   4 |

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 2.0868.0   GPS week: 0868   Day: 0   MJD: 50320.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .01 -.01  -.24  -.11  -.14   .0  .06  .05 |   -1.4   -8.2    1.3
emr  32 | .00  .01 -.01   .24   .07   .65  -.1  .08  .07 | 2904.4   35.8     .5
esa  55 |-.01  .00  .00   .18  -.14   .30  -.1  .11  .09 |   24.2   25.1    1.0
gfz  49 | .01 -.03  .01   .03  -.02  -.29   .0  .07  .06 | 2906.9   34.7     .5
igr  n/a| .00 -.01  .00   .14   .12  -.11  -.1  .06  .06 |     .2     .7     .6
jpl  37 |-.01  .01  .00  -.01  -.14   .04   .3  .06  .05 |-1911.5   -6.5     .5
ngs  50 | .02 -.04  .00  -.16   .43   .03   .0  .15  .15 |   -6.9    9.5   80.3
sio  119| .00  .02 -.01   .07   .16  -.46   .0  .08  .08 |     .0     .0     .0

Table 2.0868.1   GPS week: 0868   Day: 1   MJD: 50321.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  78 | .01  .01  .00  -.13  -.01  -.32   .2  .06  .05 |     .8   -5.9    1.4
emr  31 | .00  .01  .00   .13   .06   .28  -.1  .08  .07 | 2947.5   33.3     .5
esa  55 |-.01 -.01 -.01   .28  -.24   .52   .0  .12  .08 |   -5.1   12.6     .9
gfz  46 | .00 -.04  .00   .16   .09  -.35  -.1  .08  .07 | 2949.9   33.3     .4
igr  n/a| .01  .00  .00  -.24  -.08  -.02  -.3  .05  .04 |    -.4    1.0     .4
jpl  37 | .00  .01  .00  -.29  -.20  -.07   .1  .06  .06 | 2948.8   33.3     .4
ngs  50 | .00 -.05  .01  -.02   .43   .17   .3  .13  .13 |    2.9   -9.7   79.5
sio  118|-.01  .02  .00   .10   .08   .27  -.1  .07  .07 |     .0     .0     .0

Table 2.0868.2   GPS week: 0868   Day: 2   MJD: 50322.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  76 | .00  .02  .01  -.24  -.06  -.03   .0  .07  .06 |   -2.9    7.9    1.3
emr  29 | .00  .01 -.01   .14   .09   .35   .0  .10  .08 | 2988.2   40.6     .6
esa  56 |-.01  .00  .00   .04  -.43   .54   .0  .09  .08 |   20.6   13.6    4.5
gfz  43 | .00 -.03  .01   .05   .12  -.26  -.2  .08  .08 | 2989.5   40.4     .5
igr  n/a|-.01  .01  .01  -.27  -.23  -.40  -.5  .09  .08 |    -.5     .9     .6
jpl  37 | .00  .02  .00  -.08  -.05  -.11   .3  .07  .07 | 2989.7   40.4     .6
ngs  48 | .02 -.07 -.02   .41   .26  -.18   .2  .13  .13 |    5.6   -9.3  105.7
sio  116|-.01  .02  .00  -.01   .24  -.20   .0  .08  .08 |     .0     .0     .0

Table 2.0868.3   GPS week: 0868   Day: 3   MJD: 50323.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  76 | .00  .01  .00  -.15  -.20   .16   .1  .08  .06 |    2.1  -11.0    1.2
emr  31 | .00  .01 -.01   .17   .09   .57  -.3  .10  .08 | 3017.5   11.0     .6
esa  56 |-.01  .00  .00   .39   .16   .50   .2  .35  .10 |   -4.0   22.4    1.6
gfz  46 | .01 -.03  .01  -.02   .03  -.40  -.2  .07  .07 | 3019.7    9.6     .5
igr  n/a| .00 -.01 -.01  -.10  -.17  -.12  -.2  .06  .05 |    1.0    -.7     .5
jpl  37 | .00  .02  .00  -.17  -.17  -.05   .2  .08  .08 | 3018.8   11.1     .5
ngs  47 | .00 -.05 -.01   .50   .33  -.13  -.2  .20  .20 |   -5.5    5.0   79.6
sio  118|-.01  .01  .00  -.05   .02  -.55   .2  .09  .09 |     .0     .0     .0

Table 2.0868.4   GPS week: 0868   Day: 4   MJD: 50324.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .01  .00  -.27  -.05   .35  -.2  .09  .06 |    7.7  -21.3    1.2
emr  30 | .00  .01 -.01   .08   .02   .72  -.1  .10  .07 | 3036.3   -1.1     .6
esa  54 | .00 -.02 -.01   .32   .18   .56   .0  .22  .09 |   -3.5   -2.9    1.2
gfz  49 |-.01 -.03  .02   .22   .05  -.36   .1  .07  .07 | 3037.9   -1.8     .5
igr  n/a|-.01  .00  .00  -.27  -.31  -.12  -.1  .12  .06 |     .9   -1.4     .6
jpl  37 | .00  .02  .00  -.13  -.09  -.16   .2  .11  .11 | 3037.8    -.8     .6
ngs  50 |-.01 -.02 -.01   .01  -.20  -.36   .1  .21  .21 |    7.1  -19.8   80.7
sio  116|-.01  .03 -.01  -.23   .14 -1.00   .0  .15  .15 |     .0     .0     .0

Table 2.0868.5   GPS week: 0868   Day: 5   MJD: 50325.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02  .00  -.08  -.11   .46   .0  .08  .06 |  -10.6   -3.7    1.3
emr  30 |-.01  .00 -.01  -.09   .05   .02  -.4  .12  .11 | 3031.3   14.0     .6
esa  57 | .00  .00  .01   .11   .41   .65   .1  .16  .10 |  -46.2    1.4    1.0
gfz  48 | .01 -.03  .01   .38  -.03  -.06  -.1  .08  .07 | 3033.5   13.1     .5
igr  n/a| .01  .02 -.01  -.44  -.04   .14   .1  .07  .06 |   -3.2    3.9     .6
jpl  37 | .00  .02 -.01  -.05  -.27   .13   .3  .09  .09 | 3032.8   14.2     .5
ngs  50 | .01 -.07  .00  -.05   .44  -.73   .0  .21  .21 |   -5.4   -1.8   78.6
sio  118|-.01  .02 -.01  -.27   .16  -.70   .0  .10  .10 |     .0     .0     .0

Table 2.0868.6   GPS week: 0868   Day: 6   MJD: 50326.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .00  .01  -.20   .02  -.05  -.1  .07  .05 |    3.4   -9.4    1.6
emr  31 | .00  .02  .00  -.13  -.25   .18  -.1  .12  .11 | 3054.2    7.5     .7
esa  56 | .01  .00 -.01   .57  -.09   .64   .2  .12  .09 |  -15.2   14.4   26.7
gfz  49 | .01 -.03  .02   .26   .11  -.29   .0  .09  .08 | 3056.7    6.9     .6
igr  n/a| .00 -.01  .00   .01  -.16  -.01   .1  .06  .06 |     .2     .1     .7
jpl  37 | .00  .02  .00  -.03  -.18  -.02  -.1  .07  .07 | 3055.7    7.8     .6
ngs  49 | .02 -.03  .00  -.20   .09   .09   .1  .14  .14 |    1.2   -2.1   77.2
sio  118|-.01  .03 -.01  -.29   .31   .06   .1  .10  .10 |     .0     .0     .0

Table 3: Daily fit for each satellite and each centre resulting from weighted
         average combination and from long arc orbit dynamics (7-day). The
         first IGS column gives resulting satellite accuracy measures found in
         SP3 header. The last IGS column gives the RMS fit of the IGS orbit
         when processed through the 7-day arc evaluation.

         "E" stands for  eclipsing satellites.
         "T" stands for Total long arc orbit RMS for all satellites.
         "NE" stands for long arc orbit RMS for Non-Eclipsing satellites only.
         "MEDI","MD" stands for median of the centre's satellite RMS.

         Units: cm.

Table 3.0868.0   GPS week: 0868   Day: 0   MJD: 50320.0

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

Table 3.0868.1   GPS week: 0868   Day: 1   MJD: 50321.0

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

Table 3.0868.2   GPS week: 0868   Day: 2   MJD: 50322.0

               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  14   6   6   6  17   7    4 |    9   9  13  14  12   7  26   9    9
   2  |   5   5   9   7   7   3  12   8    3 |    7   9   9   9  10   6  15   8    6
   3E |   7  15  10   7  11   9  22  13    5 |   13  17  14  16  15  12  25  15   12
   4  |   6   5   5   8  13   5  10   7    3 |    6   9   9  10  17   6  15   7    6
   5  |   6   8   7   7   6   4  13   5    3 |    7  10   8  10   8   6  12   8    5
   6E |   9  10   6  14  12   8  18   6    4 |   16  17  17  15  16  12  23  14   13
   7E |   8  11  13  11   7   6  14   8    4 |    7  12  16  14  10   9  20  11   10
   9  |   6   7   7   6   7   4  13   7    3 |    7   8   8   9  10   5  15   8    5
  10  |   7  16   6   5   8 ---   9   9    4 |   12  20  14  15  14 ---  16  15   12
  14  |   7   5   6  13   7   4   9   8    3 |    4   6   8   7   5   5  11   6    5
  15  |   4   4   6   8   8   5  11   6    3 |   10  10  16  12  15   9  17  11   11
  16  |   6   7   5   7   7   9   9   5    3 |   11  18  17  15  15  17  17  16   14
  17  |   6   6   7   6   4   5  20   6    3 |    8   8   7   9   8   5  17   6    5
  18E |   5   8  10   6   4   6  11   8    3 |    5   9   8  11   7   7  15   9    6
  19  |   5   8   8   5   5   5  10  10    3 |    7  14   9  11  11  11  19  14    9
  21  |   6   9   4   6   8   6   9   8    3 |    6  12   8  12  14   9  16   9    8
  22  |   4   8   7   6   9   8  14  11    3 |    7  11   8  11   9   6  17  10    4
  23  |  13  20  18  11   8   8  17  16    6 |   25  40  25  32  29  33  28  43   29
  24  |   4   5   5   8   7   4  10   5    2 |    5   9   7  13  14   8  12   5    7
  25  |   7   9   7   5  11   5   7  10    3 |    6  13   6  10  16   6   9   6    5
  26E |   9   9   9   6  17   6  14   7    3 |   11   8  10  12  18   8  18  10    8
  27  |   5   6   9   7   6   4  16   6    3 |    6   9   8   8   9   6  17   5    6
  28E |   6  10  11  11   9  13  18 ---    5 |   12  15  15  18  14  15  20 ---   12
  29E |   5   9  10   7  14   4  10   7    3 |    8   9   9  11  14   7  14  11    7
  31E |   9  12  10   8  18   9  12  10    4 |   14  18  18  18  13   6  19  12   11
------|--------------------------------------|--------------------------------------
 RMS  |   7  10   9   8   9   7  13   8      |T  10  14  12  13  13  10  17  13   10
 WRMS |   6   8   8   8   8   7  13   8      |NE  9  14  11  13  13  11  17  13   10
 MEDI |   6   8   7   7   8   6  12   8      |MD  7  10   9  12  14   7  17  10    8

Table 3.0868.3   GPS week: 0868   Day: 3   MJD: 50323.0

               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
------|--------------------------------------|--------------------------------------
   1E |   6   9  14   6   5   6  14   7    3 |   11  10  14  11  12   8  19   9    9
   2  |   5   6   5   7   4   5  18  10    3 |    8  10  11  14  11   7  15  14    9
   3E |   5  17  14   8   5   7  26   9    5 |   15  25  18  18  19  13  33  15   17
   4  |   5   6  16   6   9   6  13   6    3 |    6  10  11  10  14   7  15   8    8
   5  |   7   7  13   6   2   5  12   5    3 |    7  11  11  13  12   8  13  10    8
   6E |   7   9  15   6   7   6  15   9    3 |   14  17  15  18  16  14  20  16   14
   7E |   6  11  13  10   4   7  24  10    4 |    9  14  18  17  12   9  22  12   12
   9  |   6   3   6   7   4   4  15   6    3 |    7   9   9  14  12   6  13  10    8
  10  |   6   8   5   7   4 ---  13   8    3 |   14  16  17  18  15 ---  17  16   15
  14  |  25  28 162 ---  18  27  37  18   13 |    0   0   0 ---   0   0   0   0  ---
  15  |   6   5  18   8   5   5  17   8    4 |    5   7  15  13  12   7  20  10    9
  16  |   4   7   4   7   6   8   8   6    3 |   10  12  14  13  11  15  16  12   11
  17  |   5   7   8   5   4   4  14   7    3 |    6  11  10  11  11  10  15   6    9
  18E |   7   8  14   6   3   5  15   9    3 |    6  10   8   9   7   3  15   7    5
  19  |   5   5  10   6   3   5  14   8    3 |   10  11  13  13  13  10  16  14   10
  21  |   6   8   8   5   5   5  14   8    3 |    7  11  12  14  11   8  17  10   10
  22  |   5   9   9   8   4   6  36  11    4 |    7  12  10  14   9   6  33  12    9
  23  |  15  12  20   6   5  14  24   8    5 |   28  48  24  40  38  51  50  46   40
  24  |   4   7   5   5   5   4  14   6    2 |    8  17  12  14  14  11  11   8   13
  25  |   6   9   8   6   5   5  15  13    3 |    6  10  11  10  10   8  18  14    8
  26E |   7   7  14  10   4   6  25   8    4 |   10  11  14  14   9   9  17  11    9
  27  |   4   4   6   5   3   6  15   6    2 |    8  10  14  12  10   9  13  12    9
  28E |   6   9  13   8   3   6  17 ---    4 |   19  21  20  22  19  19  24 ---   18
  29E |   5  10  17   9   3   6  29  10    4 |    8  11  13  10   9   7  32  11    7
  31E |  10  11  19   7   6   8  25   9    5 |   15  17  20  15  14   7  27  12   12
------|--------------------------------------|--------------------------------------
 RMS  |   8  10  35   7   6   8  20   9      |T  11  16  14  16  14  14  22  14   13
 WRMS |   6   8  10   7   5   8  20   9      |NE 10  16  13  16  14  15  20  15   14
 MEDI |   6   8  13   7   4   6  15   8      |MD  8  11  14  14  12   8  17  12    9

Table 3.0868.4   GPS week: 0868   Day: 4   MJD: 50324.0

               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
------|--------------------------------------|--------------------------------------
   1E |   8  11   7   8  10   7  18   8    4 |    8  10  10  12   9   6  19   9    7
   2  |   5   7   7   6   5   4  20  12    3 |    6   9  12  10   8   6  17  11    7
   3E |   8  16   9  11  10   9  19  13    5 |   19  27  24  15  24  20  29  25   21
   4  |   6   5   4   7   6   5  14   9    3 |    4  11  11  10  10   7  17  11    7
   5  |   4   6   9   7   6   5  11   5    3 |    5   9  12  11   9   6  15   8    7
   6E |   8   9  12   8   6   7  16   8    4 |   14  17  15  17  16  12  27  15   14
   7E |   9  10  15  10   6   6  22  12    4 |    6  13  14  11   8   6  27  14    8
   9  |   5   6  10   7   5   4  13   8    3 |    5   8  13   9   7   6  16  11    7
  10  |   6   8  15   6   6 ---  19  11    4 |   12  15  15  16  15 ---  23  16   14
  14  |   3   8   8   5   6   7  15  11    3 |   11  21  25   2  15  16  14  12   15
  15  |   5   4   6  10   5   5  16   8    3 |    7   8  12   9   8   6  19  11    8
  16  |   4   7  12   6   6   9  16  11    3 |   10  15  15  14  13  12  17  14   11
  17  |   5   6   8   6   6   5  19   9    3 |    8  11   9  13  12  11  18  10   10
  18E |  29  27  95 ---  48  43  67  51   22 |    0   0   0 ---   0   0   0   0  ---
  19  |   5   6  11   9  11   5  15  20    4 |    9  13  12  12  19   8  20  24   10
  21  |   5   6   5   6   4   5  12  12    3 |    6  10  12  14  10   9  18  12    9
  22  |   6   6   9   6   4   7  13  11    3 |    7   9  12  12   9   7  20  18    9
  23  |  16  13  21   9   4   9  20  18    6 |   37  56  35  48  50  52  44  61   48
  24  |   5   7   8   5   7   4  12   9    3 |   12  11   9  13  13  11  18  15   12
  25  |   6   7  12   5   5   5  12   9    3 |    5   8  12   7   8   6  11   7    6
  26E |   6  10   7   7   5   7  26  10    4 |   12  13  21  14  15  13  20  16   13
  27  |   5   6  12   5  10   6  12  10    3 |    7  10  12   9  14   9  16   8    8
  28E |   5   7  14   8   6   8  19  10    4 |   20  24  25  24  24  21  26  12   21
  29E |   8   9  12   9  15   5   9  13    4 |    6  13   9  10  16   5  13  12    5
  31E |  12   8  13   8   4  10  13   9    4 |   12  17  18  14  10   9  19  10   11
------|--------------------------------------|--------------------------------------
 RMS  |   9  10  22   7  12  11  21  15      |T  12  17  16  15  16  15  21  18   14
 WRMS |   6   7   9   7   6  11  21  15      |NE 12  18  15  16  16  16  20  19   15
 MEDI |   6   7  10   7   6   6  16  10      |MD  8  12  12  12  13   9  19  12   10

Table 3.0868.5   GPS week: 0868   Day: 5   MJD: 50325.0

               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
------|--------------------------------------|--------------------------------------
   1E |   7  13   7   8   6   6  18   9    4 |    6  12   8  14  12   7  23  11    9
   2  |   6   8   9   6   3   4   9  10    3 |    7  10  17  12   8   6  20  11    8
   3E |  12  17  38 ---  15  14  66  14   11 |   22  29  55 ---  26  21  75  24   27
   4  |   5  12   8   7   5   4  20  11    4 |    4  14   6   8   9   5  16  13    7
   5  |   6   8   7   7   3   4   8   5    3 |    4   9  10  12   7   7  16  11    8
   6E |   9  15  12  11  10   8  12   7    4 |   14  19  18  16  14  11  23  16   13
   7E |   5  18  11   8  10   6  19  12    4 |    6  13  15  14   9   7  28  15    9
   9  |   4   6   7   5   5   2  13   7    2 |    7   8   6   9   8   6  15  11    7
  10  |   8   6  11  10   7 ---  13   8    4 |   11  12  14  16  13 ---  21  12   11
  14  |  18  27  34 ---  10  28  37  23   12 |   22  30  43 ---  37  46  20  40   31
  15  |   5   8  10   7   6   8  13   9    3 |    7   9  10   7   9   6  16  10    6
  16  |   9  12  16  12   7  10  11   8    4 |   37  37  29  33  35  30  34  33   33
  17  |   3   6   8   4   4   4  11   7    2 |    3   9   9   8   9   5  10   8    6
  18E |  12  12  25   7   7  10  24  11    5 |    7  11  13  10   5   3  15  11    7
  19  |   7   7   7   6   4   4  10   9    3 |   12  13  11  12  14   9  14  11   11
  21  |   6   7   7   5   8   6   9  13    3 |    5  10  11   9  11   6  17  15    6
  22  |   5   7   8   6   4   6  14   8    3 |    4   9  10  10   6   5  15  11    5
  23  |  16  20  21   8   6  13  20   8    6 |   44  65  36  57  54  61  48  58   52
  24  |   4   9   8   6   4   4  15   7    3 |   17  23  16  22  22  20  22  19   21
  25  |   8   8  11   4   8   5  10   6    3 |    6  11   6   8  10   6  13  12    6
  26E |   8  15  13   8   4   5  23  10    4 |    8   9  11  12   8   7  21  10    7
  27  |   5  10   9   9   4   4  17   7    3 |    9   9  13  13  12   8  14  14    9
  28E |   5  11  23   9   6   6  19  13    5 |   17  20  29  23  16  15  21  13   17
  29E |   8  11  12  12   9   6  14   7    4 |    9  13  14  12  15   7  18  14    7
  31E |   8  11  15   8   8  13  23  11    5 |   15  15  22  18  12   9  30  11   13
------|--------------------------------------|--------------------------------------
 RMS  |   8  12  16   8   7   9  21  10      |T  15  20  21  18  18  18  26  19   17
 WRMS |   6  11  10   7   6   9  21  10      |NE 17  22  18  20  21  22  21  22   19
 MEDI |   7  11  11   7   6   6  14   9      |MD  8  12  13  12  12   7  20  12    9

Table 3.0868.6   GPS week: 0868   Day: 6   MJD: 50326.0

               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
------|--------------------------------------|--------------------------------------
   1E |   5  11   6  10   7   6  16   7    4 |    7  11  11  17  12   8  28  11   13
   2  |   4  10   7   7   3   4   9  13    3 |    9  11  11  13   9   8  15  11    9
   3E |   5  20  15  11   6  10  22  12    5 |    6  13  10   2   9   7  17  10    8
   4  |   4   8   4   7   6   4  12   7    3 |    5  10  10  11  11   8  15   9   10
   5  |   4   9  14   7   7   4  11   9    3 |    6  10  12   9   8   6  17   9    8
   6E |   8  14  12  14  12   7  13   8    4 |   20  17  19  21  20  14  24  14   14
   7E |   6  23  13   9   6   8  17  11    5 |    7  14  13  14   9   6  15   9    8
   9  |   3  10   7   6  10   5  15  14    3 |    7  11  11  10  11   6  23  16    9
  10  |   4   8   7   6   7 ---  10   8    3 |   13  15  16  16  14 ---  21  15   15
  14  |   5   8  16   9  10   7  12  11    4 |    0   0   0   0   0   0   0   0  ---
  15  |   7   7   6   6   5   6  10   7    3 |    7   9  14  11  10   9  20   9   11
  16  |   5   7  17   6   6  13   9   7    4 |   33  34  27  30  31  29  33  34   32
  17  |   4   7   8   8   4   7   7   8    3 |    7  10  12  12  11  10  14   7   11
  18E |   6  12  10   8   4   8  13   8    4 |    7  11  12  10   6   3  17   8    8
  19  |   4   6   8   5   5   4  11  10    3 |   10  12  11  12   9   9  15   8    8
  21  |   3   9   7   7   4   4  10  14    3 |    6  11  15  14  12   7  18  14   12
  22  |   5   8   7   7   7   5  16   9    3 |    5  12  12  11   9   6  18  11    8
  23  |  19  13  23  13   8   9  26  19    7 |   41  65  38  56  50  57  60  67   51
  24  |   4   8  15   8   3   5  13   8    3 |   22  24  15  25  24  23  23  25   25
  25  |   7   8   5   5   8   5  12   8    3 |    6   8   7   8   8   8  14   8    9
  26E |   7  16  18  15   6   6  20  13    5 |   12  12  21  14  12  13  21  12   14
  27  |   4  10   8   6   4   4  12   8    3 |    9  13  11   9   8   8  15   9    8
  28E |   4  25  21   9   6   8  13  11    5 |   29  32  33  30  31  29  33  13   28
  29E |   9   6  12  12   4   6  13  10    4 |   11  11  13  10   8  10  16  11   10
  31E |   9  12  16   7   4   9  13  13    4 |   13  18  17  14  13   9  20  12   14
------|--------------------------------------|--------------------------------------
 RMS  |   7  12  12   9   6   7  14  10      |T  15  20  17  19  17  17  23  19   17
 WRMS |   5  11   9   8   6   7  14  10      |NE 15  21  16  19  18  18  23  21   19
 MEDI |   5   9  10   7   6   6  13   9      |MD  8  12  13  13  11   8  18  11   11

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 4.0868   GPS week: 0868   MJD: 50320.0-50326.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2367 |U  46   36   84 |U  43   31   83 |   35   23   57 |
emr | emr 2380 |   39   29   74 |   37   27   71 |   24   15   38 |
esa | esa 1690 |  252  104  413 |U  44   28   89 |   26   18   45 |
gfz | gfz 1173 |   36   29   75 |U  36   26   70 |   25   16   37 |
igr | igr 2362 |   35   29   72 |   34   25   70 |   23   15   41 |
igs | igs 2396 |   37   30   72 |   34   26   69 |   24   14   39 |
jpl | jpl 2266 |U  36   28   70 |U  33   25   67 |   24   15   38 |

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 5.0868.0   GPS week: 0868   Day: 0   MJD: 50320.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |    0    0    0 |   49   34   96 |   31   27   52 |
emr | emr 2400 |    0    0    0 |   40   30   65 |   23   15   38 |
esa | esa 1657 |    0    0    0 |   41   30   68 |   23   18   39 |
gfz | gfz 1200 |    0    0    0 |   28   21   63 |   22   17   34 |
igr | igr 2224 |    0    0    0 |   41   32   63 |   23   16   40 |
igs | igs 2400 |    0    0    0 |   40   28   68 |   21   16   36 |
jpl | jpl 2284 |    0    0    0 |   39   26   64 |   23   16   36 |

Table 5.0868.1   GPS week: 0868   Day: 1   MJD: 50321.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2392 |   48   36   84 |   36   28   71 |   33   23   53 |
emr | emr 2386 |   42   34   79 |   31   24   66 |   24   13   35 |
esa | esa 1838 |   34   35   72 |   36   23   64 |   26   16   43 |
gfz | gfz 1200 |   36   35   65 |   30   27   76 |   28   17   37 |
igr | igr 2391 |   37   36   76 |   28   23   63 |   23   12   38 |
igs | igs 2392 |   35   34   74 |   28   23   62 |   23   13   36 |
jpl | jpl 2248 |   36   34   71 |   27   24   62 |   27   15   37 |

Table 5.0868.2   GPS week: 0868   Day: 2   MJD: 50322.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2395 |   39   35   76 |   35   32   70 |   35   22   52 |
emr | emr 2392 |   37   30   64 |   27   23   59 |   20   15   38 |
esa | esa 1763 |   35   34   64 |   33   23   64 |   20   18   43 |
gfz | gfz 1200 |   39   36   73 |   24   21   50 |   18   17   36 |
igr | igr 2380 |   36   31   62 |   26   22   57 |   20   16   39 |
igs | igs 2395 |   35   31   65 |   26   25   55 |   20   15   38 |
jpl | jpl 2268 |   38   31   66 |   25   24   56 |   21   15   36 |

Table 5.0868.3   GPS week: 0868   Day: 3   MJD: 50323.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   49   30   92 |   42   31   83 |   38   23   55 |
emr | emr 2394 |   41   25   86 |   37   27   83 |   28   16   41 |
esa | esa 1542 |   41   27   85 |   28   28   90 |   30   19   42 |
gfz | gfz 1152 |   50   22   99 |   33   20   53 |   26   15   31 |
igr | igr 2393 |   39   27   87 |   37   27   85 |   26   15   40 |
igs | igs 2399 |   41   26   86 |   34   27   80 |   27   15   39 |
jpl | jpl 2272 |   41   25   83 |   35   26   79 |   27   17   40 |

Table 5.0868.4   GPS week: 0868   Day: 4   MJD: 50324.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2390 |   36   36   76 |   40   33   97 |   34   23   56 |
emr | emr 2292 |   28   30   74 |   46   33   89 |   24   13   37 |
esa | esa 1511 |   27   28   67 |   35   26   87 |   28   17   43 |
gfz | gfz 1152 |   24   28   66 |   52   35   96 |   23   14   38 |
igr | igr 2387 |   31   28   71 |   33   27   89 |   22   13   39 |
igs | igs 2390 |   27   30   68 |   31   28   86 |   23   13   36 |
jpl | jpl 2258 |   31   28   66 |   30   28   87 |   22   13   37 |

Table 5.0868.5   GPS week: 0868   Day: 5   MJD: 50325.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2395 |   42   28   78 |   38   31   86 |   40   22   70 |
emr | emr 2397 |   32   25   66 |   28   25   70 |   26   15   41 |
esa | esa 1842 |   31   22   59 |   43   28   75 |   28   21   59 |
gfz | gfz 1104 |   32   26   72 |   28   34   88 |   28   17   43 |
igr | igr 2397 |   31   25   63 |   25   24   72 |   26   15   49 |
igs | igs 2398 |   32   24   62 |   26   25   71 |   28   14   47 |
jpl | jpl 2266 |   32   24   62 |   24   25   69 |   26   16   42 |

Table 5.0868.6   GPS week: 0868   Day: 6   MJD: 50326.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2196 |   56   45   94 |   55   30   70 |    0    0    0 |
emr | emr 2396 |   48   28   73 |   46   24   59 |    0    0    0 |
esa | esa 1679 |  612  247  999 |   75   35  148 |    0    0    0 |
gfz | gfz 1200 |   32   26   70 |   49   20   49 |    0    0    0 |
igr | igr 2361 |   36   27   72 |   44   20   50 |    0    0    0 |
igs | igs 2400 |   46   32   74 |   46   22   51 |    0    0    0 |
jpl | jpl 2265 |   35   26   69 |   45   20   47 |    0    0    0 |

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