Subject: [IGSREPORT-2420] Wk 0839 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 19 Feb 1996 11:16:58 PST

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IGS Electronic Report    Mon Feb 19 11:16:58 PST 1996      Message Number 2420
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0839 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0839   (Feb 04, 1996 - Feb 10, 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 (IGS08397.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 are computed using a weighted average of all available centres 
(weights are those from the orbit combination). These values are supplemented 
with the current IERS Bulletin A UT1-UTC values. 

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

 IGS08390-6.SP3  IGS GPS ephemeris files for days 0-6, week 0839 in SP3 format.
 IGS08397.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08397.SUM    Complete report.

REMARKS on IGS Rapid Service 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 on days 0-4,6 and PRN28 on day 5;

   PRN12 was not used since it was not observed at all (days 0-4) or it
   exhibited clock jumps (days 5-6) that corrupted the clock weights;
   PRN15 was not used on day 5 since it exhibited clock jumps that corrupted 
   the clock weigths.

   Clock jumps on PRN12 are also responsible for higher clock RMS for NGS on 
   day 6;

4. 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  
                    -------------+------+--------
                     3 (Feb 07)  | 16   | ESA     

5. PRN16 is to be used with caution on day 2 (Feb 06) since only one centre
   provided a solution on that day (see remark (6a) below).

   Also, PRN16 for ESA and the combined solutions was excluded from 
   Table 5.0839.2 (Daily Precise Navigation) since PRN16 was set unhealthy on 
   that day and its inclusion would have given UNREALISTICALLY LARGE precise
   NAVIGATION rms.

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 (Feb 07) | 00:00:00 | 16  |   ALL    | Modeling problems (a)(b)
          4 (Feb 08) | 00:00:00 | 23  |   ALL    | Modeling problems

   (a) PRN16 was set unhealthy starting on day 2/Feb 06 (05:56) until further 
   notice (ref. NANU 029-96037).

   (b) The ESA and the combined solutions for PRN16 were excluded from the long
   arc valuation on day 2 due to unrealistic RMS (see remark (a) above).

7. 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.

8. Starting with GPS week 0837, the igp orbits/clocks ("igp" standing for igs 
   preliminary combination) are now included in the rapid combination for 
   statitics only.  Note that the "igp" daily combination is performed on a 
   daily basis within 38 hours of last observation.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08397.SUM).

Table 1: Week 0839 summary.                       (Feb 04, 1996 - Feb 10, 1996)

Table 1.0839.a   GPS week: 0839   MJD: 50117.0-50123.0

         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  67 | .00  .02 -.01  -.29   .03   .00   .2  .06  .06 |   -1.9    3.5    2.6
        | .00  .00  .00   .10   .17   .13   .1           |    9.8   13.3
emr  29 | .01 -.04 -.01   .32  -.02   .49  -.2  .09  .09 |  599.5   25.3     .9
        | .00  .01  .01   .17   .16   .15   .1           |   43.6    8.8
esa  56 | .01 -.02 -.01   .01   .23  -.08   .2  .19  .11 |    -.8   -4.6    8.2
        | .00  .01  .01   .09   .10   .24   .1           |   14.8   15.1
gfz  46 |-.04 -.03 -.01   .19  -.31  -.48  -.4  .11  .11 |  602.4   20.9    5.8
        | .01  .01  .01   .04   .13   .11   .1           |   41.5   12.4
igp  n/a| .02 -.02 -.01   .59   .09   .08  -.1  .14  .07 |   -2.7    2.5    1.1
        | .01  .01  .01   .13   .05   .08   .1           |    4.5    6.3
jpl  37 | .01  .02  .00  -.09   .02   .08   .2  .07  .07 | -146.5    9.4     .8
        | .00  .01  .00   .07   .06   .09   .1           |  700.8   18.8
ngs  45 | .01 -.04  .03   .02   .43  -.02  -.1  .16  .16 |   72.5 -120.3 3672.6
        | .01  .01  .01   .19   .37   .39   .2           |  196.9  322.3
sio  113|-.01  .03  .01   .04  -.12  -.17   .2  .08  .07 |     .0     .0     .0
        | .01  .01  .01   .06   .11   .20   .1           |     .0     .0

Table 1.0839.b   GPS week : 0839   MJD: 50117.0-50123.0

         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   2   3   3   3 |
   2  |   2   2   2   3   2   3   2 |
   4  |   3   3   3   3   2   4   3 |
   5  |   3   3   3   3   2   2   3 |
   6  |   3   3   4   3   3   2   3 |
   7  |   3   3   3   3   3   3   3 |
   9  |   3   3   3   2   2   2   2 |
  12  | --- --- --- --- ---   5   8 | No tracking (0-4). 3 centres only (5-6).
  14E |   3   4   4   4   3   3   3 |
  15  |   3   3   3   3   3   3   3 |
  16E |   4   6   0  13   9   4   3 | No tracking (2). Modeling problems (3).
  17  |   3   3   3   3   2   2   3 |
  18  |   2   2   2   3   3   3   3 |
  19  |   2   2   2   2   2   3   2 |
  20  |   3   3   3   3   3   2   3 |
  21E |   5   5   5   5   4   3   3 |
  22  |   3   3   3   3   3   3   3 |
  23E |   6   6   7   6   6   4   6 |
  24  |   3   3   3   4   3   3   3 |
  25  |   3   3   3   2   2   3   3 |
  26  |   3   3   3   3   3   3   3 |
  27  |   2   2   2   3   2   3   2 |
  28  |   4   3   4   4   3   3   4 |
  29  |   2   3   3   3   3   3   3 |
  31  |   4   3   3   4   3   3   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 2.0839.0   GPS week: 0839   Day: 0   MJD: 50117.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .03 -.01  -.43  -.10  -.18   .2  .06  .06 |   -4.6    1.6    1.7
emr  30 | .01 -.04 -.01   .52  -.19   .39  -.3  .08  .08 |  534.6   26.5     .6
esa  56 | .01 -.01 -.01   .05   .34   .12   .2  .13  .11 |   -7.4   17.7    2.7
gfz  48 |-.03 -.04  .00   .14  -.25  -.40  -.2  .11  .10 |  536.7   21.9    4.7
igp  n/a| .02 -.02 -.01   .64   .19   .00  -.2  .07  .06 |   -1.9    1.3     .7
jpl  37 | .00  .03  .00  -.11   .05   .05   .1  .07  .07 | -677.7   -5.7     .5
ngs  47 | .01 -.04  .03   .14   .57   .06   .0  .16  .17 |   -6.3   10.5   78.9
sio  115| .00  .03  .02   .10   .09   .05   .1  .07  .07 |     .0     .0     .0

Table 2.0839.1   GPS week: 0839   Day: 1   MJD: 50118.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .02 -.01  -.25  -.14  -.17   .2  .07  .07 |   -9.8   18.5    1.9
emr  30 | .01 -.04 -.02   .39   .02   .27  -.1  .09  .09 |  554.1   33.5     .9
esa  56 | .01 -.02 -.01   .02   .07  -.30   .1  .13  .12 |  -13.9   11.4    6.1
gfz  46 |-.04 -.04 -.01   .17  -.40  -.37  -.4  .11  .10 |  562.0   20.8    6.2
igp  n/a| .02 -.03 -.01   .49   .06   .03  -.2  .07  .07 |   -2.5     .0     .9
jpl  37 | .01  .02  .00  -.13   .02   .13   .1  .07  .07 |  555.1   33.8     .8
ngs  45 | .01 -.04  .02   .11   .95   .39  -.2  .16  .18 |   -2.2    5.2   79.1
sio  113|-.01  .03  .02  -.04  -.07   .16   .3  .08  .08 |     .0     .0     .0

Table 2.0839.2   GPS week: 0839   Day: 2   MJD: 50119.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .03  .00  -.27  -.10   .09   .3  .06  .05 |    8.7   -2.6    2.2
emr  26 | .01 -.03 -.02   .26   .24   .54  -.2  .10  .10 |  588.1   22.7     .9
esa  54 | .01 -.02 -.02   .18   .15  -.18   .3  .12  .10 |   -2.2  -12.5    4.8
gfz  46 |-.04 -.02 -.01   .24  -.45  -.54  -.3  .12  .11 |  598.2     .0    6.5
igp  n/a| .03  .00 -.02   .56   .12   .15  -.1  .11  .11 |    -.5    1.0    1.0
jpl  37 | .01  .02  .00  -.16   .06   .12   .2  .08  .08 |  589.3   23.2     .9
ngs  42 | .01 -.06  .03   .12   .57   .23  -.3  .15  .14 |    2.8   -1.8   78.2
sio  111|-.01  .03  .01  -.02  -.21  -.32   .0  .08  .07 |     .0     .0     .0

Table 2.0839.3   GPS week: 0839   Day: 3   MJD: 50120.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .02  .00  -.20  -.07   .04   .0  .07  .06 |    8.7  -10.1    1.6
emr  30 | .02 -.03 -.01   .03   .11   .70  -.4  .09  .08 |  609.8   14.7    1.0
esa  56 | .00 -.02  .00  -.05   .34  -.30   .0  .38  .13 |   23.5  -21.0    3.0
gfz  48 |-.04 -.03  .00   .23  -.41  -.67  -.3  .11  .11 |  608.1   20.6    8.3
igp  n/a| .01 -.02 -.01   .38   .04   .10  -.1  .08  .06 |    -.6    -.2    1.1
jpl  37 | .02  .02  .00   .01   .02  -.04   .2  .06  .06 | -698.0  -15.6    1.0
ngs  46 | .01 -.04  .03   .25   .73   .41  -.4  .18  .17 |    7.9  -12.7   76.2
sio  111|-.01  .03  .01   .07  -.12  -.32   .2  .11  .09 |     .0     .0     .0

Table 2.0839.4   GPS week: 0839   Day: 4   MJD: 50121.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .02 -.01  -.39   .15   .17   .2  .06  .05 |     .7   -7.6    2.0
emr  31 | .01 -.03 -.01   .49  -.05   .38  -.2  .07  .07 |  622.9   18.4    1.1
esa  56 | .01 -.02  .00  -.04   .32   .31   .1  .20  .11 |   13.4   -7.5    3.9
gfz  47 |-.04 -.03 -.01   .17  -.41  -.51  -.5  .11  .11 |  627.8   14.6    4.1
igp  n/a| .01 -.02 -.01   .73   .07   .16  -.2  .07  .06 |     .2   -2.0    1.1
jpl  37 | .01  .02  .00  -.04   .06  -.03   .2  .08  .08 | -716.1   -7.5    1.0
ngs  46 | .00 -.04  .03  -.28   .01  -.55   .1  .17  .17 |    1.9  -10.3   78.0
sio  114| .00  .02  .01   .00  -.16  -.20   .2  .07  .07 |     .0     .0     .0

Table 2.0839.5   GPS week: 0839   Day: 5   MJD: 50122.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .02  .00  -.32   .28   .08   .2  .06  .06 |  -18.2   25.2    4.0
emr  29 | .01 -.04 -.01   .36  -.19   .53  -.2  .08  .08 |  627.2   39.8    1.1
esa  56 | .01 -.01 -.01   .01   .22  -.25   .2  .11  .10 |  -18.2     .1   11.0
gfz  44 |-.04 -.03 -.01   .17  -.17  -.36  -.5  .11  .11 |  625.6   40.6    5.4
igp  n/a| .01 -.01 -.02   .61   .09   .15   .0  .07  .06 |  -12.8   16.6    1.1
jpl  37 | .01  .03 -.01  -.03  -.11   .18   .1  .06  .06 | -738.6   15.7    1.0
ngs  43 | .00 -.02  .02  -.22   .12  -.38   .1  .14  .14 |  -15.1   17.9   77.1
sio  111| .00  .03  .00   .07  -.10  -.22   .1  .08  .07 |     .0     .0     .0

Table 2.0839.6   GPS week: 0839   Day: 6   MJD: 50123.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  64 | .00  .03 -.01  -.15   .18  -.05   .0  .07  .06 |    1.6    -.2    3.8
emr  29 | .01 -.04  .00   .22  -.11   .59  -.1  .10  .10 |  659.5   21.1     .7
esa  55 | .01 -.03 -.01  -.09   .20   .05   .1  .11  .09 |    -.9  -20.5   16.1
gfz  46 |-.06 -.02  .01   .20  -.11  -.51  -.6  .12  .12 |  658.5   28.1    4.4
igp  n/a| .01 -.01 -.03   .73   .09  -.02   .0  .30  .07 |    -.9     .7    1.4
jpl  37 | .01  .01  .01  -.17   .05   .12   .1  .05  .05 |  660.5   22.1     .7
ngs  47 | .00 -.03  .01   .03   .06  -.31  -.4  .16  .16 |  518.7 -850.8 9715.0
sio  113| .00  .02  .00   .12  -.24  -.35   .2  .07  .07 |     .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 (all satellites).
         "NE" stands for Non-Eclipsing satellites long arc orbit RMS.

         Units: cm.

Table 3.0839.0   GPS week: 0839   Day: 0   MJD: 50117.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   7   6  12   7   9   4  16   5    3 |    3   9   9   9   9   4  14   6    5
   2  |   3   5   9   6   6   6  11   6    2 |    6  14  14  16  12   6  15   4    9
   4  |   5   6  16   8   8   6  11   6    3 |    5  10  19  12  10   5  11   5    6
   5  |   4   6  10   8   7   5  12   8    3 |    5  10  10  11   9   5   9   3    5
   6  |   5   8  11   6   7   4  12   7    3 |    5  15  11  15  12   9  15   8    8
   7  |   7   7  16   7   5   8   9   6    3 |    5  15  15  15  11   4  15   5    8
   9  |   4  10   8   8   6   7  10   7    3 |    8  10  10  12  11  13  10   8    9
  14E |   4  10  12  12   6   9  14   8    3 |    5  15  12  19  12   8  17   5    8
  15  |   4   8  15  10   7   7  14   9    3 |    5  12  14  13  11   7  11   6    5
  16E |  11   7  10  15  14   9  20   7    4 |    7  12  10  11  12   3  19   3    6
  17  |   5   8  10   7   4   6  11   6    3 |    4  11  12  13   9   6  13   4    6
  18  |   5   6   7   7   2   4  14   4    2 |    6  11  11  10   8   5  10   7    6
  19  |   4   4   7   5   3   6   6   5    2 |    7  11  11  10   9  10  12   6    8
  20  |   4   6  11   6   6   6  14   8    3 |    5   9  11  12   9   6  11   4    5
  21E |   7  11  12  17   8   9  24  10    5 |   10  18  12  18  15  14  22  18   12
  22  |   4   7  18   6   6   7  16   7    3 |    5  10  14  12  10   6  17   4    5
  23E |   6  12  12  24   9  11  40  11    6 |   15  28  13  26  23  15  37  14   18
  24  |   4   7  17  12   5   6   9   7    3 |    4   9  16  12  10   7  11   4    6
  25  |   6   5  13   7   8   7  11   4    3 |    8   8  12  10   8   7  10   8    6
  26  |   3   9   8   9   4   5  11   8    3 |    6   8  11  11   8   6  10   6    6
  27  |   2   4   7   8   4   4   7   6    2 |    7  10  10   9   8   8  10   4    7
  28  |   5   9  17  10   6   8  19   7    4 |    5  11  13  13  10   6  21   6    6
  29  |   3   6   8   7   4   6  13   4    2 |    8  10  11  10   7   6  17  11    7
  31  |   5   9  16  11   5   7  17   8    4 |    6  13  13  12   9   5  18   6    7
------|--------------------------------------|--------------------------------------
 RMS  |   5   8  12  10   7   7  16   7      |T   6  12  12  13  10   7  15   7    7
 WRMS |   5   8  10   9   6   7  17   6      |NE  5  10  12  12   9   6  13   6    6

Table 3.0839.1   GPS week: 0839   Day: 1   MJD: 50118.0

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

Table 3.0839.2   GPS week: 0839   Day: 2   MJD: 50119.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   6   7   9  11   4   4  10   6    3 |    3  12  10  10  10   6  12   8    5
   2  |   5   6   7  10   8   6   8   7    2 |    6  11  12  16  10   7  14   8    6
   4  |   4   7  13  13  15   6  12   9    3 |    4  10  17  12  13   5  13   9    5
   5  |   4   7   9   9  10   8  16   7    3 |    4   9  10  12  11   7  16   4    4
   6  |   5  14  12  10  11   9  17   9    4 |    5  14  14  14  13  10  15   7    6
   7  |   4   7   8  10  11   9   8   5    3 |    5  16  15  19  13   5  16   5    8
   9  |   5   9   9   9   5   5  11   5    3 |    6  12  11  14   8   8  10   6    7
  14E |   4  12  13  13  11   6  14   7    4 |    6  14  22  17  12   6  15   6    8
  15  |   6   8  11  12  10   7   8   7    3 |    4  12  14  12  13   5   9   8    4
  16E | --- ---   2 --- --- --- --- ---    0 |  --- ---   0 --- --- --- --- ---  ---
  17  |   5   9   7  10  13   5  15   5    3 |    4  11  13  12  14   6  11   3    5
  18  |   4   5   5   8   8   4  10   5    2 |    6  10  11  11  10   6  10   7    6
  19  |   4   5   5   6   9   4  11   5    2 |    5   6   7   8   7   6  12   5    5
  20  |   6   5  12   9  12   7  14   7    3 |    3   7  13  12  14   5  14   3    4
  21E |   7  13  21  17   6  12  22  10    5 |   10  17  14  18  13   8  34   8    9
  22  |   5   5  12  10  14   6  10   8    3 |    5  12  18  13  19   7  15   5    6
  23E |  10  24  18  24  17  15  14  18    7 |   28  32  23  36  33  34  38  36   28
  24  |   4   5  17  12  13   6  16   7    3 |    5   9  21  15  14   5  13   4    5
  25  |   6   9  13   5  10   4  12   6    3 |    6  11  13   7  10   5  10   8    5
  26  |   3   7  13   6   5   5  15   7    3 |    6  12  14  10  13   6  15   6    7
  27  |   4   3   4   6   6   5  10   6    2 |    5   8   7   8   8   7   9   6    5
  28  |   5   7   8  12  18   7  25   5    4 |    4  11  17  13  22   5  28   5    7
  29  |   4   8   8   9   5   5  15   3    3 |    6  11  10   9   9   6   9   7    6
  31  |   4   8   7  13  10   5  14   7    3 |    4  10  16  13  13   5  17   5    6
------|--------------------------------------|--------------------------------------
 RMS  |   5   9  11  11  11   7  14   8      |T   7  13  14  14  14   9  17   9    8
 WRMS |   5   9  10  11  10   7  13   7      |NE  4  10  13  12  12   6  14   6    5

Table 3.0839.3   GPS week: 0839   Day: 3   MJD: 50120.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   5   5  13   8   5   5  12   5    2 |    6  11  12  10  11   6  12   5    5
   2  |   3   6  12   9   8   6   9   9    3 |    5  12  14  14  11   6  13  12    6
   4  |   5   6  17  10   7   6  14   6    3 |    4  11  16  11  10   7  15   7    6
   5  |   6   5  11   8   4   6  12  11    3 |    4  10  10  12   7   6  12  10    5
   6  |   3   8   9   8   6   8  13   8    3 |    5  11  14  14  10  10  12   6    6
   7  |   4   7  24  11   5   6  13   5    3 |    4  15  17  17  13   4  18   5    8
   9  |   2   5  10   8   7   5  17   7    2 |    6   5  10  11   7   7  15   7    6
  14E |   5  11  14  17   5   7  15   8    4 |    8  13   9  20  11   6  15   7    7
  15  |   5   6   9  12   8   7  12   7    3 |    4  11  12  12  12   6  13   5    5
  16E |  10  19 171 ---  26 ---  40  34   13 |  138 144 138 --- 148 --- 111 135  136
  17  |   6   8  16  10   8   4  13  10    3 |    5  13  13  14  10   7  13   8    7
  18  |   6  10   8  10   7   4  11   7    3 |    5  12  10  11  10   5  10   6    6
  19  |   4   6   9   6   5   6  11   6    2 |    5   9  11   9   8   6  11   7    5
  20  |   4   7  10   7   6   5  13  11    3 |    5  12  15  11   8   5  14   7    6
  21E |  10  12  13  15   6   6  35   7    5 |   10  18  13  17  14   9  32   9   10
  22  |   6   7  11   6   5   5  19   8    3 |    4  12  16  13   8   7  24   5    7
  23E |  21  11  24  16   8   7  21  12    6 |   28  33  25  28  35  30  37  35   28
  24  |   6  10  28  11   7   5  19   5    4 |    5  12  18  13  10   7  14   7    5
  25  |   5   3   9   8   5   4  14   8    2 |    7   7  12  10   8   7  15   5    6
  26  |   2   5  13  11   6   6  14   7    3 |    5   9  17  13   8   6  15   5    5
  27  |   3   6   8   9   5   5  11  11    3 |    5  11  12   9  10   9  10   7    6
  28  |   5   7  14  14   6   7  22   7    4 |    4  13  15  13  12   7  24   7    7
  29  |   6   9   9  11   5   6  23   7    3 |    8  10  11  12   9   9  17   9    7
  31  |   4   8  23  12   6   7  11   8    4 |    5  13  16  12  10   7  16   9    7
------|--------------------------------------|--------------------------------------
 RMS  |   7   8  38  11   8   6  18  10      |T  29  32  31  13  32   9  28  29   28
 WRMS |   5   8  12  11   6   6  17   8      |NE  5  11  13  12   9   6  15   7    6

Table 3.0839.4   GPS week: 0839   Day: 4   MJD: 50121.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   6   6  14   9   6   6  14   5    3 |    5   9  11  10   9   6  15   5    5
   2  |   6   6   8  10   5   4   9   4    2 |    5  13  13  17  12   7  14   4    8
   4  |   5   4  10   9   6   6  15   5    2 |    4   9  15  12   9   6  15   6    6
   5  |   4   6   9   7   8   5  11   8    2 |    4   9  10  12   9   6  12   7    6
   6  |   5   8  17   7   7   7  10   8    3 |    5  13  19  14   9   6  16   6    7
   7  |   6   6  15  11   6   6  12   6    3 |    6  16  15  17  15   6  18   4    9
   9  |   3   4   6   7   8   6  11   6    2 |    6   6   9  14  10   9  10   5    6
  14E |   5   7  16  13   4   8  12   9    3 |    7  12  11  17  10   7  14   5    7
  15  |   6   5  10  11   7   9  14   7    3 |    5  10  11  11  12   7  15   4    5
  16E |   8   6  79  17   9  12  26   7    9 |   63  63  60  16  66  10  69  61   61
  17  |   4   4   6   5   4   6  11   5    2 |    4  10  11  12   8   7  17   3    6
  18  |   5   5  10  11   5   6  11   6    3 |    5  11  10  13   8   8  12   6    7
  19  |   4   4   8   6   4   5  11   4    2 |    5   5   8  10   7   8  13   6    6
  20  |   3   6   9   8   8   6  13   9    3 |    4   9  11  12   9   5  12   8    5
  21E |   4   9   6  13   8   8  24   9    4 |    9  16  11  19  16  10  21  13   10
  22  |   4   6  13   9   4   6  25   7    3 |    6  11  16  11   9   6  20   5    6
  23E |  11  15  12  19  10  15  34  13    6 |   39  46  45  40  47  43  59  44   41
  24  |   7   7  20  12   7   8  10   5    3 |    4   9  11  16   8  10  13   5    6
  25  |   4   4  13   7   6   5  18   5    2 |    6   7  15  10   8   7  13   5    6
  26  |   4   6   8  15   4   5  15   7    3 |    7  12  12  14  10   6  17  11    8
  27  |   4   5   7   7   3   3  10   4    2 |    4   8   8  12   8   9   7   6    6
  28  |   4   5  16  12   8   6  20   7    3 |    4  10  16  13  11   7  16   8    6
  29  |   6   9  12  12   4   7  10   5    3 |    8  10   9  13   7   6  12   8    7
  31  |   5   8  14  10   5   7  20   6    3 |    4  12  14  11   9   7  17   7    6
------|--------------------------------------|--------------------------------------
 RMS  |   5   7  20  11   6   7  16   7      |T  16  18  19  15  19  11  23  16   16
 WRMS |   5   7  11  10   6   7  16   6      |NE  5  10  12  12   9   7  14   6    6

Table 3.0839.5   GPS week: 0839   Day: 5   MJD: 50122.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   6   8   7   8   5   6  13   6    3 |    6  11  10   9   9   5  13   5    5
   2  |   5   8   9   9   7   7   7   6    3 |    6  12  14  16  13   7  11   5    7
   4  |   6  12  13  11   5   6  14   7    4 |    5  11  13  12  10   5  14   6    6
   5  |   4   6   8   7   8   4  10   8    2 |    5   9  10  12  11   5  10   5    5
   6  |   5   9   7   7   7   5  11   5    2 |    4  13  12  12   9   4  13   5    7
   7  |   5   9  16  12   6   5   7   8    3 |    5  16  14  20  14   5  14   6    8
   9  |   4   4   6   9   4   4  11   6    2 |    5   8   9  13  10   7  11   7    6
  12  |   5 --- --- ---  22 ---  13   8    5 |    5 --- --- ---  25 ---   9   6    6
  14E |   7  10   9  13   4   7  12   7    3 |    8  13  11  17  10   6  15   6    8
  15  |   5   6  10  10   3   5  11   8    3 |    3  10  11  11   8   5   9   8    6
  16E |  10   7  13  15  10   6  21  10    4 |   49  53  41  17  52   8  42  51   49
  17  |   5   7  10   5   5   4  13   5    2 |    6  11  11  10   9   7  13   5    7
  18  |   8   8   7   9   5   5  11   8    3 |    9  12   9   9   9   5  11   7    7
  19  |   6   5   8  10   3   4   9   8    3 |    4   7   7   8   7   8  11   7    6
  20  |   3   6  10   6   4   6  11   7    2 |    5   8  14  12   7   7  11   5    5
  21E |   4   8   8  13   4   6  17   7    3 |   17  21  13  19  19  16  21  17   16
  22  |   3   8   9  10   3   5  15   7    3 |    6  12  15  11   9   5  15   4    6
  23E |  10  11  14   9   6   6  15  10    4 |   36  42  35  39  39  36  34  38   35
  24  |   6   9  15   8   5   5  15   8    3 |    5  15  11  11  11   7  13   7    7
  25  |   4   8   7   9   6   7  17   5    3 |    7   8  11  10   7   9  12   4    7
  26  |   4   7   9  11   4   4  17   7    3 |    6  10  14  13  10   6  15   8    7
  27  |   4   6  11  10   6   6  11   7    3 |    4   8   8   6   7   7   8   5    5
  28  |   4   5  11  12   7   5  16   7    3 |    5   9  12  11   9   4  15   5    5
  29  |   8  10   7  11   6   5  10   4    3 |    9  12  10  11  12   6  12   7    6
  31  |   4   7  15   8   6   5  13   7    3 |    4  10  12  12   9   6  17   5    5
------|--------------------------------------|--------------------------------------
 RMS  |   6   8  10  10   7   5  13   7      |T  13  17  15  14  16  10  16  14   13
 WRMS |   5   8   9  10   5   5  13   7      |NE  5  10  11  11  10   6  12   5    6

Table 3.0839.6   GPS week: 0839   Day: 6   MJD: 50123.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   3  13  11  10   8   4  14   7    3 |    4  14  10  14  11   4  14   5    7
   2  |   4   6   5  10   6   3   7   5    2 |    6  12  12  20  11   9  12   7   10
   4  |   4   7  10  11   9   4  15   5    3 |    5  10  13  14  10   5  14   4    7
   5  |   4   9   8  10   6   4  13   8    3 |    5   9   9  13   8   4   9   6    6
   6  |   5  10   7  10   7   5  12   5    3 |    5  13  10  14   8   5  12   5    6
   7  |   7  11   9  13  10   5  13   7    3 |    5  16  15  20  14   5  19   4   10
   9  |   4   7   8   9   7   3   9   7    2 |    6   9  10  13   9   7  12   6    8
  12  |   8 --- --- --- 147 ---  25   8    8 |    6 --- --- ---  26 ---  14   7    8
  14E |   6   8  12  14  10   4  22   5    3 |    7  13   9  15  12   5  15   6    7
  15  |   5   7  10  11   6   4  10   7    3 |    5  10  12  13  11   6  11   5    7
  16E |   9   9   8  14   7   4  19   6    3 |   52  57  48  15  62  10  57  57   52
  17  |   5   9   9  10   6   4  17   5    3 |    5  13  10  15   9   6  14   4    8
  18  |   8  10   9  13   3   5  13   7    3 |    6  12   9  14   9   7  13   8    8
  19  |   5   6   5   8   2   2  10   3    2 |    6   9  10  11   9   8  12   7    7
  20  |   4   7  10  11   5   6  12   8    3 |    4   8  11  12   7   5   9   6    6
  21  |   6  13  10  12   4   5  21   6    3 |   11  16  15  16  14  11  24  12   10
  22  |   3  11   9   7   8   6  16   6    3 |    5  12  13  12   8   6  11   5    6
  23E |  18  20  23  17   9   5  23   6    6 |   53  58  51  58  62  58  65  62   54
  24  |   6   9  13  15   5   3  12   7    3 |    6   9  12  15  10   6  11   6    7
  25  |   3   7   8  12   9   2  16  10    3 |    8   8  12  13  10   8   9  10    8
  26  |   4   9   8  14   4   3  15   6    3 |    5  12  12  18  10   5   9   6    7
  27  |   4   6   5  11   3   3  10   5    2 |    7  10  11  11   9   9   9   5    9
  28  |   7   7  10  14  12   4  25   9    4 |    6  10  14  12  11   5  12   7    6
  29  |   7   9   9  12   8   4  11   4    3 |    5  14  10   9  13   7  12   9    8
  31  |   5   9  13   9   8   5  20   9    3 |    6  11  13  12   9   6  12   7    7
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  10  12  30   4  16   7      |T  15  19  18  18  20  13  21  18   16
 WRMS |   5   9   9  12   6   4  16   6      |NE  5  11  11  14  11   6  12   6    7

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 4.0839   GPS week: 0839   MJD: 50117.0-50123.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2146 |U  74   39  104 |U  58   35  100 |   51   35   83 |
emr | emr 2287 |   44   29   63 |   33   24   62 |U  37   20   50 |
esa | esa 2070 |  318  185  577 |U 283  176  505 |  255  144  285 |
gfz | gfz 1138 |  193  149  390 |U 190  121  366 |  173  105  232 |
igp | igp 2283 |   57   30   73 |   35   28   70 |   42   23   62 |
igs | igs 2310 |   42   27   70 |   38   25   70 |   33   18   51 |
jpl | jpl 2260 |U  39   26   62 |U  31   22   62 |   35   19   49 |

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 5.0839.0   GPS week: 0839   Day: 0   MJD: 50117.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2260 |   50   34   78 |   42   30   94 |   49   31   79 |
emr | emr 2303 |   48   35   60 |   31   18   60 |   41   24   64 |
esa | esa 2049 |   89   59  168 |  126   76  245 |   76   57  107 |
gfz | gfz 1152 |  143  123  334 |  132  100  259 |   98   71  227 |
igp | igp 2299 |   41   28   61 |   31   23   65 |   48   27   70 |
igs | igs 2304 |   40   31   62 |   30   16   63 |   37   22   60 |
jpl | jpl 2287 |   40   28   54 |   27   15   61 |   38   23   63 |

Table 5.0839.1   GPS week: 0839   Day: 1   MJD: 50118.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2221 |   56   35   89 |   44   37   82 |   49   28   70 |
emr | emr 2302 |   41   27   65 |   36   30   69 |   39   20   51 |
esa | esa 2094 |  117   43  178 |  300  147  430 |  132   63  142 |
gfz | gfz 1152 |  192  164  534 |  219   95  423 |  206  125  268 |
igp | igp 2304 |   42   28   67 |   36   34   75 |   47   23   55 |
igs | igs 2304 |   35   28   69 |   40   31   72 |   36   18   49 |
jpl | jpl 2287 |   37   25   66 |   34   28   68 |   40   20   48 |

Table 5.0839.2   GPS week: 0839   Day: 2   MJD: 50119.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2163 |   72   32   92 |   51   37   83 |   44   30   70 |
emr | emr 2200 |   41   28   52 |   39   23   59 |   35   19   43 |
esa | esa 1952 |  227   83  324 |  178   87  252 |   86   72  149 |
gfz | gfz 1104 |  206  168  365 |  157  165  383 |  183  102  236 |
igp | igp 2092 |   45   26   56 |   38   26   56 |   40   21   53 |
igs | igs 2208 |   43   24   57 |   41   24   61 |   30   17   42 |
jpl | jpl 2189 |   40   27   56 |   35   21   54 |   33   18   42 |

Table 5.0839.3   GPS week: 0839   Day: 3   MJD: 50120.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2121 |   51   32   88 |   52   34   87 |   47   28   79 |
emr | emr 2302 |   49   26   63 |   34   24   64 |   32   20   44 |
esa | esa 2018 |  130   66  216 |  146  102  313 |   97   42  109 |
gfz | gfz 1104 |  195  186  339 |  141  135  391 |  159  113  216 |
igp | igp 2303 |   52   28   67 |   32   27   67 |   39   23   54 |
igs | igs 2304 |   41   24   72 |   42   30   80 |   28   16   47 |
jpl | jpl 2196 |   43   26   63 |   33   24   67 |   35   20   51 |

Table 5.0839.4   GPS week: 0839   Day: 4   MJD: 50121.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2205 |   85   50  118 |   47   32   79 |   46   33   69 |
emr | emr 2301 |   38   28   56 |   28   23   55 |   34   18   42 |
esa | esa 2163 |  224  102  348 |  132  105  236 |   93   39  119 |
gfz | gfz 1152 |  180  117  342 |  200   92  325 |  177   83  211 |
igp | igp 2303 |   40   28   62 |   28   25   56 |   40   22   50 |
igs | igs 2304 |   47   25   65 |   37   26   64 |   28   17   45 |
jpl | jpl 2273 |   30   25   56 |   26   21   51 |   32   19   43 |

Table 5.0839.5   GPS week: 0839   Day: 5   MJD: 50122.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2221 |   94   38  118 |   90   39  156 |   69   51  112 |
emr | emr 2300 |   47   27   70 |   35   25   64 |   39   19   56 |
esa | esa 2110 |  385  290  999 |  256  199  568 |   97   47  114 |
gfz | gfz 1152 |  211  158  437 |  265  140  444 |  199  136  257 |
igp | igp 2344 |   50   28   71 |   33   27   68 |   46   23   72 |
igs | igs 2383 |   42   31   92 |   46   26   85 |   37   20   60 |
jpl | jpl 2288 |   42   24   69 |   33   22   70 |   35   17   53 |

Table 5.0839.6   GPS week: 0839   Day: 6   MJD: 50123.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1831 |   93   48  134 |   62   35   97 |   46   40   96 |
emr | emr 2303 |   42   28   70 |   27   21   61 |   35   16   49 |
esa | esa 2101 |  647  360  999 |  564  349  999 |  631  357  690 |
gfz | gfz 1152 |  213  112  335 |  183   98  299 |  163   90  202 |
igp | igp 2335 |  103   39  113 |   47   31   95 |   32   22   76 |
igs | igs 2364 |   42   28   66 |   28   19   59 |   30   17   52 |
jpl | jpl 2298 |   40   28   66 |   28   19   57 |   28   17   43 |

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