Subject: [IGSREPORT-2943] Wk 0867 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Wed, 4 Sep 1996 6:51:30 PDT

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IGS Electronic Report    Wed Sep  4  6:51:30 PDT 1996      Message Number 2943
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0867 IGS Final Orbits

Final IGS Orbit Combination - Week 0867   (Aug 18, 1996 - Aug 24, 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 (IGS08677.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:

 IGS08670-6.SP3  IGS GPS ephemeris files for days 0-6, week 0867 in SP3 format.
 IGS08677.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08677.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. Centre clock weights were determined using the following non-SA satellites:
   PRN15 and PRN28.

4a.There was a maneuver of PRN16 on day 1 (Aug 19) (ref. NANU 137-96232).
   The ESA solution which models the maneuver is usually provided for a
   maneuvered satellite. Since ESA was late at the time of the combination,
   no solution was provided for PRN16 on day 1.

 b.There was a maneuver of PRN16 on day 2 (Aug 20) (ref. NANU 140-96233).
   The ESA solution which models the maneuver is usually provided for a
   maneuvered satellite. Since ESA was late at the time of the combination,
   no solution was provided for PRN16 on day 2.

 c.There was a maneuver of PRN28 on day 5 (Aug 23) (ref. NANU 144-96236).
   The ESA solution which models the maneuver is usually provided for a
   maneuvered satellite. Since ESA was late at the time of the combination,
   no solution was provided for PRN28 on day 5.
 
5. Some 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.  The following table 
   lists the exclusions:

                     Day (Date)  | PRN  | Centres  
                    -------------+------+--------------------
                     1 (Aug 19)  |  16  | NGS (see Remark 4a)   
                     5 (Aug 23)  |  28  | SIO (see Remark 4c)   

6. State vector resets were modeled for the following satellites to
   alleviate the effects of modelling problems, experienced by all centres,
   in the long arc process:

          Day (Date) |   TIME   |  PRN  | Centres  | Reason
         ------------+----------+-------+------------------------------
          3 (Aug 21) | 00:00:00 |  10   |   ALL    | Modeling problems
          3 (Aug 21) | 00:00:00 |  14   |   ALL    | Modeling problems (a)
          3 (Aug 21) | 00:00:00 |  16   |   ALL    | Maneuver (b)
          3 (Aug 21) | 00:00:00 | 18,23 |   ALL    | Modeling problems 
          6 (Aug 24) | 00:00:00 |  28   |   ALL    | Maneuver 

  (a) Due to unrealistic long arc RMS, PRN14 was excluded from the long arc
      evaluation on days 0 and 6 for ACs that submitted solutions for this 
      satellite;

  (b) Due to unrealistic long arc RMS, PRN16 was excluded from the long arc
      evaluation on day 1 for ACs that submitted solutions for this satellite;

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

8. ESA solutions were not used in the combination due to late submission
   to CDDIS.

9. PRN20 has been unusable since May 10, 1996 (wk 0852, day5) beginning at 
   15:18. PRN20 will not return to service (ref. NANU 118-94204).

10. 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 (IGS08677.SUM).

Table 1: Week 0867 summary.                       (Aug 18, 1996 - Aug 24, 1996)

Table 1.0867.a   GPS week: 0867   MJD: 50313.0-50319.0

         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  76 | .00  .02  .00  -.32  -.07   .22   .0  .08  .06 |   -5.9   -1.3    1.3
        | .01  .00  .00   .06   .04   .19   .1           |    8.0   13.8
emr  30 | .00  .00 -.01   .18   .07   .65   .0  .10  .09 |  100.0   34.6     .6
        | .00  .01  .01   .07   .08   .25   .1           |   78.5   10.5
gfz  47 | .01 -.03  .01   .24   .02  -.43  -.1  .07  .07 |  100.0   34.1     .5
        | .00  .00  .00   .07   .06   .18   .1           |   78.6   10.4
igr  n/a| .00 -.01  .00  -.07  -.02  -.44  -.1  .08  .07 |    -.3    1.3    1.0
        | .00  .02  .01   .13   .14   .43   .1           |    3.2    4.6
jpl  37 | .00  .02  .00  -.10  -.12   .08   .1  .07  .07 |  100.0   10.8     .5
        | .01  .01  .00   .08   .05   .10   .1           | 2256.8   38.8
ngs  49 | .00 -.05  .01  -.13   .13  -.19   .0  .14  .14 |   -3.9    -.4  100.8
        | .01  .01  .01   .17   .26   .32   .2           |    6.4    9.0
sio  117|-.01  .02  .00   .14   .10  -.33   .0  .09  .09 |     .0     .0     .0
        | .01  .01  .00   .10   .06   .24   .1           |     .0     .0

Table 1.0867.b   GPS week : 0867   MJD: 50313.0-50319.0

         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  |   4   8  18   3   4   3   3 | Modeling problems on day 2.
   2  |   4   3   3   4   3   3   3 |
   3E |   5   4   5   6   6   6   6 |
   4  |   3   3   3   3   3   3   3 |
   5  |   3   3   3   3   3   3   3 |
   6E |   4   5   4   5   5   6   5 |
   7E |   4   3   3   4   4   3   4 |
   9  |   3   4   3   3   3   3   3 |
  10  |   4   5   5   4   4   4   4 |
  14  |   3   4   3   5   3   2  18 | Modeling problems on day 6.
  15  |   3   3   3   4   3   2   3 |
  16  |   4 --- ---   3   4   4   3 | Maneuvers on days 1 and 2.
  17  |   3   3   3   3   3   2   3 |
  18  |   3   4   3  25   3   3   3 | Modeling problems on day 3.
  19  |   3   3   3   4   2   3   3 |
  21  |   3   3   3   3   3   3   3 |
  22  |   3   4   3   4   4   4   4 |
  23  |   3   4   3   2   3   3   3 |
  24  |   2   3   3   3   3   3   3 |
  25  |   3   3   4   3   4   4   4 |
  26  |   2   3   4   3   4   4   4 |
  27  |   3   3   3   4   3   3   3 |
  28E |   4   3   3   4   4 ---   6 | Maneuver on day 5.
  29  |   3   3   3   4   3   3   3 |
  31E |   4   4   4   5   4   4   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 2.0867.0   GPS week: 0867   Day: 0   MJD: 50313.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  75 | .01  .02  .00  -.36  -.06   .07  -.1  .06  .06 |  -17.4    8.7    1.4
emr  29 | .00 -.01 -.01   .18   .12  1.09   .1  .08  .07 | 2640.4   33.9     .6
gfz  44 | .00 -.03  .00   .33   .08  -.51  -.2  .07  .07 | 2641.9   33.6     .5
igr  n/a| .01 -.01  .00   .00  -.07  -.39  -.1  .07  .07 |    2.1    -.7    2.1
jpl  37 | .00  .01  .00  -.15  -.11   .03   .1  .06  .06 | 2640.9   34.2     .5
ngs  47 |-.01 -.06  .00   .17  -.40  -.56   .2  .13  .13 |  -11.7   13.1   83.0
sio  111|-.01  .01  .00  -.02   .15  -.32   .1  .07  .07 |     .0     .0     .0

Table 2.0867.1   GPS week: 0867   Day: 1   MJD: 50314.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  76 | .00  .01  .00  -.31  -.11   .26   .0  .06  .06 |   -9.8   10.1    1.2
emr  29 | .01  .00 -.01   .15  -.02   .61   .0  .09  .09 | 2678.3   36.9     .6
gfz  49 | .00 -.03  .01   .26  -.02  -.52  -.1  .07  .06 | 2681.1   35.7     .5
igr  n/a| .01 -.01  .00  -.26  -.10  -.47   .0  .08  .07 |    -.1     .3     .5
jpl  37 |-.01  .02  .00   .07  -.11   .08   .2  .06  .06 | 2680.6   36.8     .5
ngs  47 | .01 -.04  .00  -.28   .39   .09   .0  .13  .13 |    1.9   -8.0  183.4
sio  122|-.01  .02  .00   .06   .09  -.43  -.1  .10  .10 |     .0     .0     .0

Table 2.0867.2   GPS week: 0867   Day: 2   MJD: 50315.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .01  .02 -.01  -.41  -.02   .40   .1  .09  .07 |    -.6   -2.5    1.3
emr  30 | .01  .00  .00   .32  -.05   .59  -.1  .10  .09 | 2714.5   37.6     .6
gfz  47 | .01 -.02  .01   .15   .01  -.28  -.2  .06  .06 | 2715.9   37.6     .5
igr  n/a| .00  .00  .01  -.08   .22  -.55  -.2  .07  .06 |     .0     .2     .6
jpl  37 |-.01  .01  .00  -.09  -.03   .05   .1  .06  .06 | 2715.6   37.4     .6
ngs  48 | .00 -.04  .00  -.33   .18  -.63  -.3  .16  .13 |    -.2   -3.9   77.0
sio  118|-.02  .02  .00   .10   .05  -.35  -.1  .09  .09 |     .0     .0     .0

Table 2.0867.3   GPS week: 0867   Day: 3   MJD: 50316.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02 -.01  -.32  -.10   .34   .0  .11  .07 |    2.2  -10.4    1.2
emr  30 | .00  .01 -.01   .11   .02   .57   .2  .08  .08 | 2756.5   24.4     .6
gfz  46 | .01 -.03  .01   .21  -.07  -.77  -.1  .08  .07 | 2757.9   24.0     .5
igr  n/a| .01 -.04  .01   .14  -.15 -1.25   .0  .15  .11 |    1.8    -.5     .8
jpl  37 | .01  .03  .00  -.13  -.11   .02   .1  .11  .12 |-1891.3  -14.8     .6
ngs  50 | .01 -.05  .00  -.08   .28  -.24   .0  .15  .15 |    2.3   -7.9   80.3
sio  121|-.01  .01 -.01   .21   .14  -.10   .0  .13  .13 |     .0     .0     .0

Table 2.0867.4   GPS week: 0867   Day: 4   MJD: 50317.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .02  .00  -.25  -.09   .45   .0  .06  .06 |    -.7   -3.8    1.2
emr  30 | .00  .01 -.02   .20   .15   .35   .1  .09  .09 | 2790.3   35.8     .5
gfz  48 | .01 -.02  .01   .29  -.01  -.38  -.1  .08  .07 | 2792.0   35.1     .5
igr  n/a| .00 -.01  .01  -.22  -.13  -.51  -.3  .06  .06 |    -.6     .6     .5
jpl  37 | .00  .01  .00  -.19  -.11   .31   .1  .07  .07 | -371.7  -47.9     .5
ngs  50 |-.01 -.05  .03  -.21   .05  -.07   .1  .12  .12 |     .4   -3.0   76.9
sio  118|-.01  .02 -.01   .17   .12  -.77  -.1  .08  .08 |     .0     .0     .0

Table 2.0867.5   GPS week: 0867   Day: 5   MJD: 50318.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  76 | .00  .02  .00  -.34  -.03   .13  -.1  .06  .06 |    -.1  -25.6    1.3
emr  29 | .01  .00 -.01   .18   .12   .46  -.1  .09  .08 | 2827.1   20.5     .5
gfz  47 | .01 -.02  .01   .29   .12  -.28  -.2  .08  .07 | 2829.1   20.2     .4
igr  n/a| .00  .00  .00  -.04   .00   .01  -.2  .05  .04 |    1.6   -2.3     .5
jpl  37 | .01  .02  .00  -.13  -.16   .00   .3  .06  .06 |-1902.0  -23.4     .5
ngs  50 |-.01 -.05  .02   .00   .11   .23   .1  .12  .12 |   -9.8   -4.8   79.5
sio  116|-.01  .01  .00   .20   .00  -.31   .0  .07  .07 |     .0     .0     .0

Table 2.0867.6   GPS week: 0867   Day: 6   MJD: 50319.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  75 |-.01  .01 -.01  -.26  -.12  -.08   .0  .11  .06 |  -15.0   14.2    1.3
emr  31 | .01  .00 -.01   .14   .15   .84  -.1  .13  .10 | 2854.8   52.9     .5
gfz  48 | .01 -.03  .01   .16   .04  -.29  -.1  .08  .07 | 2857.2   52.5     .4
igr  n/a| .01  .01  .00  -.05   .11   .05   .1  .08  .06 |   -7.2   11.6     .5
jpl  37 |-.01  .03  .00  -.09  -.19   .06   .1  .08  .08 | 2856.3   53.4     .4
ngs  50 | .00 -.05  .01  -.16   .28  -.17   .0  .17  .17 |  -10.5   12.0   77.3
sio  113| .00  .02  .00   .26   .16  -.02   .0  .09  .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 3.0867.0   GPS week: 0867   Day: 0   MJD: 50313.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr gfz igr jpl ngs sio  IGS |  cod emr gfz igr jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1  |   5   9   8   8   7  15   6    4 |    6  14  12  10   9  28   8   10
   2  |   4   9   6   3   6  15  11    4 |    7  12  11   8   5  21   7    7
   3E |   6  16   9  14   8  13   9    5 |   10  18  19  15  10  20  11   11
   4  |   6   6   5   6   4   9   6    3 |    6  10   9   7   6  10   6    6
   5  |   7   7   8   5   5  10   5    3 |    4   9   9   7   5  14   6    6
   6E |  11   8   9  12   8  13   7    4 |    8  10  12  11   9  12  11    7
   7E |   6   6   5  10   7  22  11    4 |    8  12  13  15   9  18   9    8
   9  |   6   6   6   5   3   7   7    3 |   11  14  12  10  12  14  12   12
  10  |   7   9   8  11 ---  11   9    4 |   14  16  17  14 ---  21  11   14
  14  |   8   7   8   7   7  12   5    3 |    0   0   0   0   0   0   0  ---
  15  |   6   7   9   6   6   9   5    3 |    7   8   8   9   6  11   6    5
  16  |   6   8  10   6 ---  12   5    4 |    2   1   2   2 ---   3   2    1
  17  |   3   7   5   5   5   8   6    3 |    4   9   7   7   6   9   6    5
  18  |   5   9   7   6   4  13   9    3 |    5  11  11   9   6  14   8    7
  19  |   5   3   5   3   3  14   9    3 |   22  27  27  28  26  23  27   25
  21  |   4   6   5   8   6  10   7    3 |    6  11  13  12   9  14   9    9
  22  |   5  10   8   7   7  13   5    3 |    6  12   9  12   5  16   6    6
  23  |   8   7   4   6   4  12   6    3 |   11   9   9  13  13  14  13   10
  24  |   5   5   5  10   6   8   6    2 |    5   8   8   7   6  10   6    6
  25  |   6   8   7   5   5  10   8    3 |    7  10  11   9   7  16  10    8
  26  |   4   5   6   8   5   7   7    2 |    8  10  11  12   7  11   9    7
  27  |   4   4   4   5   3  20   8    3 |    7  10  11   9   9  20   8    8
  28E |   5   8   8   7   7  13   7    4 |    7  11  13  10   7  21   9    8
  29  |   5   5   8   4   7  17   4    3 |    6   8  12   8   8  14   9    7
  31E |  13   9   6   8   6   9   9    4 |   11  12  15  10   8  14  10   10
------|----------------------------------|----------------------------------
 RMS  |   6   8   7   7   6  13   7      |T   8  12  12  11   9  16  10    9
 WRMS |   6   7   7   7   6  13   7      |NE  8  11  11  11   9  15   9    9
 MEDI |   6   7   7   6   6  12   7      |MD  7  11  11  10   8  14   9    8

Table 3.0867.1   GPS week: 0867   Day: 1   MJD: 50314.0

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

Table 3.0867.2   GPS week: 0867   Day: 2   MJD: 50315.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr gfz igr jpl ngs sio  IGS |  cod emr gfz igr jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1  |  29  29 ---  13 ---  50  21   18 |   21  38 ---  13 ---  47  17   15
   2  |   6   7   5   4   5  10   9    3 |    5   9  11   8   5  14   6    6
   3E |   8  14  10  10   9  14  12    5 |   11  19  17  15   9  23   9   11
   4  |   7   8   7   2   6   8   7    3 |    5   9   9   6   6   9   6    5
   5  |   6   8   4   5   5  10   7    3 |    5   9   7   7   7  10   6    5
   6E |  12  10   9  10   8  13  11    4 |    8  15  12  10   6  14  11    7
   7E |   6   9   5   5   6  14   8    3 |    6  13  11  12   7  20   8    7
   9  |   6  10   4   5   5   9  11    3 |    9  12  10   9  10  13  13    9
  10  |   9  14   7   8 ---  15   8    5 |    9  15  17  13 ---  24  11   13
  14  |   6   3   7   8   5  10   6    3 |    5   5   8   7   4   9   6    5
  15  |   8   7   5   6   3  12   5    3 |    5   7   8   8   6  18   7    6
  17  |   5   6   3   5   5  14   6    3 |    3   9   9   7   8  10   6    6
  18  |   6   6   5   4   5  19   7    3 |    6   9  11   7   4  18   6    7
  19  |   4   6   4   5   4  11   9    3 |   12  15  13  11  13  19  15   13
  21  |   4   7   5   7   4   8   7    3 |    5  12  11   9   7  14   5    7
  22  |   9   9   4   8   4  12   9    3 |    6  13   9  12   6  15   5    6
  23  |  10   7   5   6   5   7   6    3 |   22  21  24  24  23  26  23   22
  24  |   6   7   6   4   7   8   7    3 |    4   8   8   6  10   9   7    6
  25  |  10  11  10   8   7  16   8    4 |    5  14  10   9  10  16  10    8
  26  |   9   8   9   6   7  10   7    4 |    5   9  10   8   6  11   8    5
  27  |   3   5   4   4   4  16   7    3 |    7   7   8   8   7  15   7    6
  28E |   5   6   9   7   6  10   7    3 |    6  10  13  11   6  15   8    7
  29  |   4   5   6   3   5  13   7    3 |   10  13  13  11  12  16  14   11
  31E |  12  12   6   5   6  15  10    4 |   14  13  14  13   8  16  11    9
------|----------------------------------|----------------------------------
 RMS  |   9  10   6   7   6  16   9      |T   9  14  12  10   9  18  10    9
 WRMS |   7   9   6   6   6  13   9      |NE  9  14  11  10   9  18  10    9
 MEDI |   6   8   5   6   5  12   7      |MD  6  12  11   9   7  15   8    7

Table 3.0867.3   GPS week: 0867   Day: 3   MJD: 50316.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr gfz igr jpl ngs sio  IGS |  cod emr gfz igr jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1  |   6   7   6  11   5  15   8    3 |    9  10  10  14   6  21  12    8
   2  |   8   9  14  16   7   9   8    4 |    5  13  12  18   5  12  10    7
   3E |   9  13   9  14  11  24  11    6 |    9  19  18  19  10  31  13   11
   4  |   6   8   6  11   4   9   9    3 |    5  12   7  12   8  13  11    7
   5  |   7  10   8   8   4   8   7    3 |    6  11  10  18   6  11  11    7
   6E |  10   8  15   7   8  14  11    5 |    9  12  13  14   8  17  11    9
   7E |   5   9   7   9   7  16  11    4 |    9  12  14  17   8  23   9    9
   9  |   5   8   6  13   6  12   8    3 |   10  11  10  11  10  16  14    9
  10  |   8  10   7  12 ---  12   9    4 |   13  15  15  14 ---  18  14   12
  14  |   8  10 ---  20  12  12   9    5 |    8   9 ---  16  13  11  12    9
  15  |   5   7   5  11   4  19   9    4 |    6   9   8  11   6  17   6    5
  16  |   8   6   5   8 ---   7   7    3 |    3  11  12  14 ---  13   5    7
  17  |   5   5   5   8   4  10  11    3 |    5   8   8  11   6  10  13    6
  18  |  42 --- ---  33  44  41  43   25 |    8 --- ---  32  51  13  60   27
  19  |   9   6   8  19   6   7  11    4 |   17  24  25  39  17  22  18   19
  21  |   6   7   7   9   5  14   8    3 |    6  11  14  12   7  19  11   10
  22  |   9  13   5  15   7  15  10    4 |    7  19   9  18   5  20   8    8
  23  |   5   6   4   9   4   8   6    2 |   17  18  18  18  16  20  17   17
  24  |   6   7   8  11   6  10   8    3 |    5  10   9   9   8   9  10    6
  25  |   9   7   7  22   4   9  10    3 |    8   9  11  23   6  13  12    7
  26  |   6   4   7  10   7   8   8    3 |    7   9  12   8   6  16  10    7
  27  |   7  10   7   8   7  15   6    4 |    7  16  13  17   9  14  11    8
  28E |   6   8   9  14   7  14  14    4 |    7  11  14  17   6  15  14    7
  29  |   5   7   8  10   7  15   9    4 |   10  13  15  12  13  11  15   10
  31E |  10  11  10  22   6  15  12    5 |   11  14  14  18  10  17  15   10
------|----------------------------------|----------------------------------
 RMS  |  11   8   8  15  11  15  13      |T   8  13  13  17  13  16  16   10
 WRMS |   7   8   7  11  12  15  13      |NE  8  13  12  17  15  15  17   11
 MEDI |   7   8   7  11   6  12   9      |MD  8  12  12  16   8  16  12    8

Table 3.0867.4   GPS week: 0867   Day: 4   MJD: 50317.0

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

Table 3.0867.5   GPS week: 0867   Day: 5   MJD: 50318.0

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

Table 3.0867.6   GPS week: 0867   Day: 6   MJD: 50319.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr gfz igr jpl ngs sio  IGS |  cod emr gfz igr jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1  |   5   7   4   9   5  12   7    3 |    8   9   8   8   6  14   8    6
   2  |   6   7   9  11   5  12   7    3 |    6  10  11   9   6  13   6    7
   3E |   6  21   9  12   9  32  10    6 |    8  19  15  15   9  31   8   11
   4  |   5   9   7   4   5  11   7    3 |    6  11   9   8   7  15   7    7
   5  |   5   8   9   3   5  10   7    3 |    5  11  11   7   7  11   9    7
   6E |   9  12  16   5   8  14  11    5 |   10  13  15  10   8  18  13    9
   7E |   4  11   8   6   6  15   7    4 |    8  12  13   9   7  25   9    9
   9  |   5  10   5   3   5  12   9    3 |   13  14  14  10  13  14  14   12
  10  |   7   8   9   5 ---  13   7    4 |   11  13  15  11 ---  19  10   11
  14  |  43  37 ---  22  28  53  22   18 |    0   0 ---   0   0   0   0  ---
  15  |   6  11   6  11   4  11   8    3 |   10   8  10  14   6  11   9    7
  16  |   6   9   7   4   9   9   6    3 |    4  10  11   7   7  10   7    5
  17  |   5   6   5   7   3   8   9    3 |    9  12  10   8   8  11  14    9
  18  |   4   9   6   6   5  13   7    3 |    5   9   9   7   8  14  11    5
  19  |   5   6   7   2   4  10   5    3 |   11  12  12  13  13  14  14   11
  21  |   5   8   6   9   5  10   5    3 |    7  11  13  14   8  14  10    9
  22  |   6  14   5   6   5  13   9    4 |    5  13  10  10   7  17   7    7
  23  |   7  11   5   4   5  12   7    3 |   18  23  22  21  22  24  21   21
  24  |   5   8   7   4   4   9   7    3 |    7  11  10   6   8  11   6    7
  25  |   6   9   7   3   4  13  11    4 |    9  11  11   9   8  15  11    8
  26  |   8   6   9   5   7  20   5    4 |    8   8  13   8   8  12   9    8
  27  |   6   6   6   4   5  19   5    3 |    7  11  13   9  12  21  10   10
  28E |   8  15   6  12 ---  14 ---    6 |    4  10   4   4 ---   6 ---    4
  29  |   5  13   7   9   5  11   7    3 |    9  16  11  15   7  16   8    9
  31E |  12  15   8   4   7   8   9    4 |   15  14  17  12  14  18  16   13
------|----------------------------------|----------------------------------
 RMS  |  11  13   8   8   8  17   9      |T   9  12  12  10   9  16  10    9
 WRMS |   6  10   7   6   8  17   9      |NE  8  11  12  10   9  14  10    9
 MEDI |   6   9   7   5   5  12   7      |MD  8  11  11   9   8  14   9    9

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 4.0867   GPS week: 0867   MJD: 50313.0-50319.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2344 |U  52   38   92 |U  48   33   96 |   38   25   61 |
emr | emr 2332 |   45   31   80 |   40   25   83 |U  25   12   40 |
gfz | gfz 1145 |   50   35   83 |U  46   27   61 |   22   13   34 |
igr | igr 1587 |   46   30   81 |   50   33  109 |   27   20   54 |
igs | igs 2348 |   45   31   82 |   40   25   80 |   26   15   41 |
jpl | jpl 2173 |U  51   33   84 |U  41   26   82 |   25   14   41 |

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 5.0867.0   GPS week: 0867   Day: 0   MJD: 50313.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2398 |    0    0    0 |   50   31   86 |   38   27   61 |
emr | emr 2399 |    0    0    0 |   34   19   60 |   23   11   41 |
gfz | gfz 1200 |    0    0    0 |   30   15   48 |   23   13   43 |
igr | igr 2112 |    0    0    0 |   56   51  145 |   32   40  106 |
igs | igs 2399 |    0    0    0 |   36   20   59 |   25   14   43 |
jpl | jpl 2187 |    0    0    0 |   32   19   57 |   23   15   45 |

Table 5.0867.1   GPS week: 0867   Day: 1   MJD: 50314.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2278 |   45   33   79 |   39   35   88 |   37   25   63 |
emr | emr 2279 |   40   28   72 |   33   28   71 |   23   11   33 |
gfz | gfz 1104 |   40   28   66 |   28   30   50 |   20   10   28 |
igr | igr 1092 |   39   26   62 |   25   27   47 |   26   10   35 |
igs | igs 2283 |   40   28   73 |   32   28   72 |   22   13   35 |
jpl | jpl 2091 |   46   31   78 |   33   30   78 |   21   12   35 |

Table 5.0867.2   GPS week: 0867   Day: 2   MJD: 50315.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2247 |   56   40   97 |   77   46   82 |   41   28   66 |
emr | emr 2261 |   51   30   84 |   72   40   75 |   28   13   34 |
gfz | gfz 1104 |   57   28   84 |   97   51   51 |   30   15   41 |
igr | igr 1065 |   56   26   88 |   90   49   56 |   28   18   40 |
igs | igs 2264 |   52   32   86 |   71   39   65 |   28   17   39 |
jpl | jpl 2092 |   57   35   85 |   78   42   70 |   28   16   37 |

Table 5.0867.3   GPS week: 0867   Day: 3   MJD: 50316.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   47   39  104 |   42   32  141 |   36   21   56 |
emr | emr 2304 |   40   36   92 |   36   27  146 |   24   12   42 |
gfz | gfz 1104 |   41   41   91 |   22   16   51 |   22   12   30 |
igr | igr 1010 |   38   37   97 |   53   33  211 |   25   15   41 |
igs | igs 2400 |   39   34   97 |   35   26  136 |   26   14   41 |
jpl | jpl 2188 |   52   36   98 |   34   28  142 |   20   12   33 |

Table 5.0867.4   GPS week: 0867   Day: 4   MJD: 50317.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2392 |   59   34   78 |   39   27   80 |   35   27   57 |
emr | emr 2386 |   40   23   62 |   31   19   68 |   20   11   33 |
gfz | gfz 1200 |   45   24   67 |   31   17   63 |   21   12   28 |
igr | igr 1140 |   46   24   67 |   31   17   63 |   20   13   28 |
igs | igs 2392 |   43   25   65 |   30   19   65 |   22   16   37 |
jpl | jpl 2275 |   41   25   66 |   28   18   61 |   24   16   39 |

Table 5.0867.5   GPS week: 0867   Day: 5   MJD: 50318.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2304 |   52   40   95 |   40   28  102 |   32   21   60 |
emr | emr 2303 |   52   32   79 |   34   19   75 |   21   11   36 |
gfz | gfz 1152 |   64   41   98 |   35   18   91 |   18   12   28 |
igr | igr 2301 |   51   33   82 |   34   19   74 |   19   11   34 |
igs | igs 2304 |   50   33   82 |   31   19   80 |   21   12   36 |
jpl | jpl 2192 |   56   33   91 |   31   18   78 |   22   13   32 |

Table 5.0867.6   GPS week: 0867   Day: 6   MJD: 50319.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2391 |   52   39   97 |   37   28   78 |   44   25   64 |
emr | emr 2391 |   45   33   85 |   25   16   50 |   35   15   57 |
gfz | gfz 1152 |   49   41   84 |   27   22   59 |   20   16   35 |
igr | igr 2388 |   43   34   82 |   24   17   55 |   33   15   55 |
igs | igs 2392 |   45   34   88 |   24   19   56 |   34   16   52 |
jpl | jpl 2184 |   51   35   82 |   23   17   50 |   35   16   57 |

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