Subject: [IGSREPORT-2538] Wk 0845 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 1 Apr 1996 12:17:19 PST

******************************************************************************
IGS Electronic Report    Mon Apr  1 12:17:19 PST 1996      Message Number 2538
******************************************************************************

Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0845 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0845   (Mar 17, 1996 - Mar 23, 1996)

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

COMBINATION STRATEGY:

For a complete description of the combination strategy, please refer to the 
report posted on CDDIS (IGS08457.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:

 IGS08450-6.SP3  IGS GPS ephemeris files for days 0-6, week 0845 in SP3 format.
 IGS08457.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08457.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. 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.

4. Centre clock weights were determined using the following non-SA satellites:
   PRN15 and PRN28 only. PRN12 was either not observed or exhibited clock jumps
   that corrupted the clock combination. 
   Note that PRN12 was set unhealthy starting on Nov. 18, 1995 (wk827, day 6)
   and is supposed to be disposed of on Mar. 26, 1996 (wk846, day2) 
   (Ref. NANU 051-96086).
   Therefore, PRN12 combined orbits/clocks should be used with caution for the 
   whole week.

   Higher clock RMS for NGS on day 3 (Mar 20) were caused by clock jumps on 
   PRN01; Higher clock RMS for NGS on day 4 (Mar 21) were caused by clock jumps
   on PRN01 and PRN21; Note that PRN01 was set unhealthy starting on day 3 
   (Mar 20) at 17:07 until day 4 (Mar 21) at 22:48 (Ref. NANU 060-96081).

5. There was a maneuver of PRN07 on day 5 (Mar 22) (ref. NANU 061-96083).
   The ESA solution which modeled the maneuver is provided for that satellite
   on that day as the combined solution. An associated accuracy code of 0
   (unknown) was given since there was no redundancy. The ESA and the combined
   solutions for PRN07 were excluded from the long arc evaluation on 
   day 5 due to unrealistic RMS caused by the maneuver.

6. Some orbit solutions were excluded from the combination because they were
   biasing the weighted average. They were still used for statistics 
   computation.  The following table lists the exclusions:

                     Day (Date)  | PRN  | Centres  
                    -------------+------+---------------
                     5 (Mar 22)  |  07  | COD, GFZ, NGS

   Note:  On day 5, EMR orbit solutions for PRN07 were not excluded from the 
          combination since it did not provide any solutions (0.000000 values)
          for that satellite between 20:00 and 23:45.

7. 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
         ------------+----------+-----+-------------------------------------
          2 (Mar 19) | 12:00:00 | 06  |   ALL    | Modeling problems
          2 (Mar 19) | 12:00:00 | 22  |   ALL    | Modeling problems
          6 (Mar 23) | 00:00:00 | 07  |   ALL    | Maneuver

8. 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.

9. Bad igp clock solutions on days 5-6 (seen in Table 2.0845.5-6 and 
   Table 5.0845.5-6) are due to a significant lack of data caused by the shut
   down (for maintenance) of JPL archive on Mar 23/24 (see IGSMail #1252).
   Since the JPL archive was inaccessible at the time of the IGP solutions/
   combination, most Analysis Centres experienced problems on these days which
   explained the bad performance for igp on days 5-6.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08457.SUM).

Table 1: Week 0845 summary.                       (Mar 17, 1996 - Mar 23, 1996)

Table 1.0845.a   GPS week: 0845   MJD: 50159.0-50165.0

         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  68 | .00  .01  .00  -.26   .10   .02   .1 1.44  .06 |    3.2   -6.9    1.5
        | .00  .00  .00   .07   .15   .30   .1           |    6.6   11.9
emr  28 | .01  .00  .00   .34  -.27   .15  -.2  .11  .10 | 1388.6   19.2     .8
        | .01  .00  .01   .11   .16   .25   .2           |   43.5    7.0
esa  55 | .01  .00  .00  -.05   .03  -.03   .2  .11  .10 |   -2.9   21.2    2.4
        | .01  .01  .01   .13   .22   .11   .1           |   18.7   11.7
gfz  48 |-.03 -.05  .00   .25  -.07  -.42  -.2 1.47 1.58 | 1390.2   19.3     .7
        | .01  .01  .01   .06   .13   .21   .1           |   43.8    6.8
igp  n/a| .01 -.01 -.01  -.23  -.28   .01  -.2 1.44  .60 | -142.0  213.2 1653.6
        | .01  .01  .01   .47   .42   .10   .2           |  375.7  565.7
jpl  37 | .00  .02  .00  -.21   .05   .07   .1  .07  .07 | 1316.9   15.5     .7
        | .01  .00  .00   .08   .15   .13   .1           |  222.9   14.5
ngs  44 | .03 -.05  .01   .22   .58   .05  -.2  .18  .19 |  831.5-1457.413371.2
        | .01  .01  .01   .32   .25   .21   .3           | 1430.1 2508.9
sio  112|-.01  .02  .01   .06  -.15   .02  -.1 1.44  .75 |     .0     .0     .0
        | .00  .00  .00   .13   .17   .23   .1           |     .0     .0

Table 1.0845.b   GPS week : 0845   MJD: 50159.0-50165.0

         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 |   5   5   5   8   6   7   5 |
   2  |   3   4   3   3   3   5   3 |
   4  |   3   4   3   3   4   5   4 |
   5  |   3   3   3   3   3   3   2 |
   6E |   5   7   9   7   6   6   6 |
   7E |   5   4   4   4   4  11  15 | Maneuver on day 5. Less tracking days 5-6.
   9  |   3   3   4   3   3   5   3 |
  12  |   6   6   3   6   5   0   7 | See REMARK 4.
  14  |   3   4   4   4   4   4   3 |
  15  |   4   3   3   3   4   5   3 |
  16  |   5  10   6   4   3   5   3 |
  17  |   3   4   3   4   3   5   3 |
  18E |   4   4   5   4   4   7   4 |
  19  |   3   3   3   3   3   4   3 |
  20  |   3   4   4   3   3   3   3 |
  21  |   3   3   3   4   3   5   3 |
  22  |   5   4  10   6   3   5   3 |
  23  |   3   4   4   3   3   5   3 |
  24  |   3   4   3   3   3   6   3 |
  25  |   3   4   4   3   3   5   3 |
  26E |   5   5   5   4   4   8   5 |
  27  |   2   3   3   3   3   4   3 |
  28E |   5   5   5   5   4   6   4 |
  29E |   4   4   4   4   4   5   3 |
  31E |   5   5   5   4   4   7   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 2.0845.0   GPS week: 0845   Day: 0   MJD: 50159.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 |-.01  .01  .00  -.36   .12  -.50   .2  .08  .06 |    7.8  -23.2    1.6
emr  28 | .02  .00  .00   .43  -.20   .49  -.1  .08  .08 | 1325.4   14.5     .8
esa  55 | .01  .01 -.01   .09   .21  -.01   .3  .11  .10 |   -4.7   11.7    2.4
gfz  48 |-.02 -.05 -.01   .23   .02  -.10  -.2  .13  .11 | 1327.4   14.8     .8
igp  n/a| .02 -.01  .00   .29   .10   .09  -.3  .08  .07 |    1.3   -3.5     .8
jpl  37 | .01  .02  .00  -.25  -.02   .15   .1  .07  .07 |  817.1  -13.7     .8
ngs  45 | .02 -.05  .01   .14   .48  -.17  -.1  .15  .15 |   -1.5    2.1   76.3
sio  111| .00  .02  .01   .14  -.16  -.03  -.1  .09  .08 |     .0     .0     .0

Table 2.0845.1   GPS week: 0845   Day: 1   MJD: 50160.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 | .00  .01  .00  -.18   .37  -.17   .1  .08  .06 |   12.6  -21.1    1.7
emr  30 | .01  .00 -.01   .28  -.42   .41   .0  .12  .12 | 1354.0   10.6     .9
esa  56 | .01  .00 -.01   .09  -.29   .12   .4  .13  .12 |  -26.1   28.7    2.3
gfz  49 |-.02 -.05  .00   .19   .00  -.29  -.1  .15  .12 | 1355.0   11.1     .8
igp  n/a| .00  .00 -.01  -.02  -.45  -.05  -.2  .08  .07 |   -1.3    1.9     .9
jpl  37 | .01  .03  .00  -.35  -.21  -.09  -.1  .09  .09 | 1354.8   11.3     .8
ngs  43 | .04 -.04  .01  -.25   .86   .22   .4  .20  .20 |  -11.4   17.3   77.2
sio  110|-.01  .02  .01   .23   .20   .06  -.1  .09  .07 |     .0     .0     .0

Table 2.0845.2   GPS week: 0845   Day: 2   MJD: 50161.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 | .00  .01  .00  -.35   .05   .37   .1  .11  .06 |   -5.0   11.4    1.4
emr  29 | .00  .00  .00   .35  -.04   .21  -.4  .10  .10 | 1363.1   31.8     .7
esa  56 | .01  .02  .01  -.13  -.07  -.02   .2  .13  .11 |   -6.8   27.7    1.3
gfz  48 |-.03 -.05 -.01   .31  -.13  -.43  -.2  .14  .12 | 1364.0   32.0     .7
igp  n/a| .00 -.01 -.01  -.12  -.39   .09  -.2  .08  .06 |   -1.6    1.4     .7
jpl  37 | .00  .02  .00  -.14   .04   .18   .2  .08  .08 | 1364.2   32.2     .6
ngs  44 | .05 -.06 -.01   .61   .74   .01  -.4  .25  .26 |    1.7    2.5   74.6
sio  110| .00  .02  .01   .07  -.07  -.41   .1  .08  .08 |     .0     .0     .0

Table 2.0845.3   GPS week: 0845   Day: 3   MJD: 50162.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  65 | .00  .01  .00  -.26   .10  -.06   .1  .08  .05 |    7.4   -6.6    1.4
emr  29 | .02 -.01  .00   .43  -.16  -.03  -.3  .10  .10 | 1393.6   14.7     .7
esa  56 | .02 -.02 -.01   .05   .41  -.06   .3  .12  .11 |   -3.2    7.2    2.3
gfz  48 |-.03 -.04  .00   .26  -.03  -.36  -.2  .13  .12 | 1394.3   15.5     .6
igp  n/a| .01  .01 -.01  -.04   .02  -.04  -.5  .07  .06 |     .3    -.7     .8
jpl  37 | .00  .02  .00  -.13   .00   .24   .0  .06  .06 | 1394.7   14.7     .7
ngs  45 | .03 -.06  .01  -.04   .67  -.06  -.1  .21  .22 | 3182.0-5616.028760.0
sio  114|-.01  .02  .01   .02  -.25  -.03   .0  .09  .07 |     .0     .0     .0

Table 2.0845.4   GPS week: 0845   Day: 4   MJD: 50163.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .01  .00  -.25   .02   .03   .0  .06  .04 |   -1.2   -3.1    1.6
emr  29 | .02 -.01  .00   .45  -.17   .23  -.2  .12  .12 | 1406.6   23.0     .8
esa  55 | .00  .00  .00  -.20   .03   .00   .1  .11  .10 |   -6.1   39.5    3.2
gfz  47 |-.04 -.05  .00   .34  -.22  -.40  -.2  .11  .10 | 1408.5   22.6     .7
igp  n/a| .01  .00  .00  -.89  -.59   .07  -.3  .08  .07 |    1.2   -3.1    1.4
jpl  37 | .00  .02  .00  -.15   .18  -.03   .1  .07  .07 | 1407.8   23.1     .9
ngs  44 | .02 -.06  .00   .21   .71  -.19  -.4  .15  .16 | 2643.0-4593.020600.0
sio  114|-.01  .02  .00   .05  -.19   .27   .1  .09  .08 |     .0     .0     .0

Table 2.0845.5   GPS week: 0845   Day: 5   MJD: 50164.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .00  -.23  -.12   .23   .0 3.81  .10 |    4.5   -4.8    1.5
emr  27 | .00  .00 -.01   .28  -.48  -.11  -.2  .10  .09 | 1431.8   19.0     .7
esa  55 | .00  .01  .00  -.18   .01  -.24   .1  .08  .08 |   -8.8   11.5    2.5
gfz  48 |-.04 -.05 -.01   .24  -.26  -.74  -.3 3.88 4.17 | 1433.4   18.5     .7
igp  n/a| .00 -.01 -.04  -.90  -.89   .09   .2 3.81 1.59 |     .4     .3    5.6
jpl  36 |-.01  .01  .00  -.18   .12   .08   .0  .07  .07 | 1432.4   19.4     .6
ngs  45 | .02 -.03  .01   .23   .51   .35  -.3  .14  .14 |    2.9   -4.7   76.1
sio  114|-.01  .02  .01  -.20  -.33   .30  -.1 3.80 1.99 |     .0     .0     .0

Table 2.0845.6   GPS week: 0845   Day: 6   MJD: 50165.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .00  -.16   .19   .27   .1  .06  .05 |   -3.6   -1.1    1.4
emr  27 | .01  .00  .01   .15  -.39  -.15  -.3  .11  .11 | 1446.0   21.0     .6
esa  55 | .01  .00  .00  -.04  -.06   .00   .2  .09  .07 |   35.7   22.2    2.2
gfz  47 |-.04 -.05  .00   .16   .10  -.60  -.1  .12  .11 | 1448.6   20.1     .7
igp  n/a| .01 -.03 -.03   .07   .26  -.17   .0  .15  .13 | -994.0 1496.0 4375.0
jpl  37 | .01  .02  .00  -.28   .27  -.07   .1  .06  .06 | 1447.3   21.6     .6
ngs  43 | .03 -.07  .04   .62   .09   .22  -.4  .16  .16 |    3.8   -9.9   76.1
sio  114| .00  .01  .01   .08  -.24   .00  -.2  .07  .06 |     .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 3.0845.0   GPS week: 0845   Day: 0   MJD: 50159.0

               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
------|--------------------------------------|--------------------------------------
   1E |   4   7  11  19  11  10  22   7    5 |    6  11  12  21  12   9  24   8    9
   2  |   7   8   8   9   7   7  13   5    3 |    7   7   8  14   9   8   7   7    6
   4  |   8   5  10  10   4   6  10   6    3 |    6   9  14  13   9   8  19   5    8
   5  |   5   6   8   8   5   6  12   7    3 |    5   6   9  10   8   9  12   5    6
   6E |  16  14  15  13   7   8  11  12    5 |   15  12  10  16   6   6  17   6    7
   7E |  10  10  10  17   8  12  23  10    5 |    6  15  12  24  15   5  27   8   10
   9  |   6   7  11   7   5   5   9   6    3 |    4   6   9   9   9   6  10   4    5
  12  |   6 --- --- ---  10 ---   8  11    6 |    6 --- --- ---  10 ---   7  10    7
  14  |   4   5   6  11   5   5  22   7    3 |    4   7  11  15  11   7  16   7    7
  15  |   5   9  14  13  10   7   8   7    4 |    4   9   8  11  11   7  11   5    6
  16  |  17   8  17  12  12   6  14  10    5 |   20  23  26  36  28  24  34  26   25
  17  |   4   7   9   7   4   5  13   7    3 |   18  19  23  24  22  17  29  18   19
  18E |   6   7  10  19  13   7  16  12    4 |    9  10  13  23  15   8  21   9    9
  19  |   6   5  10   8   4   5   7   6    3 |    7   6  11  12   9   6  12   5    6
  20  |   5   4   9  14   5   5   9   7    3 |    6   6  10  14   9   7  14   7    7
  21  |   4   6   7   9   9   5  14   8    3 |    4   8  11  12  10   5  15   6    7
  22  |  10  10  19  13   6   7  13  11    5 |    7   9   9  12   5   7   8   5    5
  23  |   6   8   7   7   5   9  16   7    3 |   17  18  21  21  21  18  20  17   17
  24  |   7   8   7   9   6   9   8   9    3 |    8  10  13  14  12   6  13   9    9
  25  |   8   6  12   8  10   4  10   9    3 |    8   6  10  10  10  10  11   8    7
  26E |   8  10  14  14   8  10  22   9    5 |   18  18  13  20  12  19  17  18   15
  27  |   5   5   6   8   4   3  10   6    2 |    4   7  10  11   7   5  10   7    6
  28E |   5  10  11  22   7   9  26  11    5 |    9  13  13  24  11   6  22   6    9
  29E |   9   9   8  15   6   4  12   8    4 |    9  11   8  16   8   8  16   7    6
  31E |   7  14  14  14  11   6  17  11    5 |    7  13  16  16  10   6  18   5    9
------|--------------------------------------|--------------------------------------
 RMS  |   8   8  11  13   8   7  15   9      |T   9  11  13  17  12  10  17  10   10
 WRMS |   6   8  10  11   7   7  15   8      |NE  9  11  13  16  13  10  16  10   10

Table 3.0845.1   GPS week: 0845   Day: 1   MJD: 50160.0

               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
------|--------------------------------------|--------------------------------------
   1E |   7   9  12  20  12   8  31   8    5 |    6  11   9  19   9   6  20   6    5
   2  |   7  14  10  10   6   8  23   5    4 |    4  13   9  12   9   7  15   6    4
   4  |   7  11  10   8   5  10  18   8    4 |   10  12  17  10  10   7  24   3    7
   5  |   4   6  11   8   5   5  17   8    3 |    6   9  11   7   6   6  14   6    4
   6E |  23  20  19  17  10  11  19   8    7 |   23  20   7  18   7   8  26   9   11
   7E |   7  10  10  14   6   9  23   9    4 |    9  16   9  22  10   6  28   6    9
   9  |   6   8  14   8   6   6  13   8    3 |    8   9  13  10   9   6  13  11    4
  12  |   5 --- --- ---   8 ---  12  10    6 |    5 --- --- ---   7 ---  10   7    4
  14  |   4   9  19  10   6   7  20   7    4 |    4   9  15  15   7   8  15   8    5
  15  |   5   8  11  11   8   7  15   8    3 |    5   9  11  12   8   6  13   7    5
  16  |  15  21  16  41  12  24  26  25   10 |   31  39  35  51  33  36  48  43   34
  17  |   5  14  11  10  11   6  14   5    4 |   21  28  26  21  29  19  20  26   22
  18E |   6   6  10  17   4   7  23   9    4 |    8  10  11  20  11   8  22   7    8
  19  |   6  12  11   9   6   7  14   3    3 |    6  17  12  11  10   7  17   6    6
  20  |   4   9  11  16   7   6  17   6    4 |    6  12  12  11   7   7  13   8    5
  21  |   4   9  10   9   7   6  15   7    3 |    3   9  12  11   8   7   8   7    5
  22  |   5   8  11  16   3   4  18   9    4 |   16  11   9  15   4   5  15   8    4
  23  |   4  13  14   5  15   8  15   6    4 |   10  12  18  12  15  11  12  12   10
  24  |   8   9  15   9   6  10  15   9    4 |    8  16  20  12  14  11  18   9    9
  25  |   8   6  14  12   4   5  11   9    4 |   11   9  11  10   8   8  10   5    6
  26E |   9  13  20  10   7  12  29   7    5 |   20  22  20  19  21  14  39  13   16
  27  |   5  11  10   8   5   6  14   5    3 |    6  12  13  11   9   5  14   6    5
  28E |   5  12  12  17  13  12  22   7    5 |    8  12  12  21  16   5  22   6    7
  29E |   5   5  10  14  12   7  31   9    4 |    7   8   8  15  10   7  24   7    6
  31E |  10  21  16  13   7   9  16  10    5 |   11  19  14  16  13   6  15   7    7
------|--------------------------------------|--------------------------------------
 RMS  |   8  12  13  15   8   9  20   9      |T  12  15  15  17  13  11  21  12   10
 WRMS |   6  12  12  12   7   9  20   7      |NE 11  16  16  17  13  12  18  14   11

Table 3.0845.2   GPS week: 0845   Day: 2   MJD: 50161.0

               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
------|--------------------------------------|--------------------------------------
   1E |   8   8  14  20  12   7  33  11    5 |    5  11  22  20  14   6  29   9    6
   2  |   5   9  10   6   4   6  11   7    3 |    5   7  12  10   6   7   9   7    4
   4  |   5   7   9  10   4   6  13   6    3 |    5  10  11  11   7   8  19   6    6
   5  |   7   5   8  10   5   8  16   7    3 |    6   5   8  10   6   9  15   7    4
   6E |  28  13  20  27  16  14  57  10    9 |   20  22  15  21  17  13  37  17   12
   7E |   4  13   7  16   8   8  24   9    4 |    7  15  11  22   9   6  32   6    8
   9  |   6   8  12  11   5   8  21   4    4 |    4   9  10  14   9   7  17   6    5
  12  |   4 --- --- ---   6 ---   8   5    3 |    5 --- --- ---   9 ---  10   5    4
  14  |   4   9   8  11   6   7  24  11    4 |    4  10  10  15   9   8  16  10    6
  15  |   6   8  11  12   6   6  11   6    3 |    5  10   8  11   9   6  13   8    5
  16  |  10  18  20  14   7   9  22   9    6 |   23  31  38  36  36  30  43  36   31
  17  |   6   7  10   8   6   7  16   7    3 |   25  33  31  28  31  29  29  32   28
  18E |   6   5  23  17   3   8  16   7    5 |    8   9  15  22  11   6  21   7    8
  19  |   4   5   9   9   3   5  13   5    3 |    5   6  10  13   6   8  12   9    6
  20  |   4   7   7  13   6  12  27   5    4 |    7   4   8  13   8  10  27   6    5
  21  |   3  10  12  12  10   6  13   5    3 |    3   9  11  13  12   6  16   7    6
  22  |  36  13  27  16  11  11  60  14   10 |   31  38  49  41  44  39  99  42   38
  23  |   4   9  10   8   4  10  16   7    4 |   12  14  17  17  13  14  18  16   13
  24  |   9   5   8   8   7   8  15   7    3 |    8  13  16  16  13  14  15  10   11
  25  |   8   7  12  11   6   6  18   8    4 |    8  10  13  14   8  11  21   9    9
  26E |   9  12  10  17   5   8  19  12    5 |   33  31  30  35  30  36  30  37   32
  27  |   4   6   9   9   4   6  13   4    3 |    4   6  12  12   7   8  12   7    6
  28E |   5  13  13  21  14   8  24  11    5 |    9  17  13  21  11   8  22   9    7
  29E |   7   8  12  15   6   5  12   8    4 |    6  10  12  16   9   8  18   7    6
  31E |   8  17  16  12   8   7  25  12    5 |    8  15  17  16  10   6  25   6    7
------|--------------------------------------|--------------------------------------
 RMS  |  11  10  13  14   8   8  25   8      |T  13  17  19  20  17  16  29  16   14
 WRMS |   6  10  11  12   6   8  26   8      |NE 12  16  20  19  17  16  30  17   15

Table 3.0845.3   GPS week: 0845   Day: 3   MJD: 50162.0

               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
------|--------------------------------------|--------------------------------------
   1E |   6   9  12  18   9   7  73  16    8 |    9  13  12  22  13   6  63  11    8
   2  |   4   9  11   7   5   4  16   6    3 |    6  10  12  11   9   5   9   7    5
   4  |   5   7  13  10   6   7  19   6    3 |    5   9  12  11  10   7  15   6    5
   5  |   4   7  13   8   4   3  13  10    3 |    5   5   9  12   5   5  14   7    3
   6E |  20  19  13  20  12  10  23  14    7 |   18  20  11  22  14   7  28  14    9
   7E |   4  14   8  12   7  10  21   9    4 |    6  17  11  19  10   7  23   7    7
   9  |   5   5  10   8   2   5  11   6    3 |    3   5  12  11   6   4  11   9    4
  12  |   4 --- --- ---  11 ---  12  11    6 |    5 --- --- ---  11 ---  10  13    6
  14  |   5  10  12  11   4   6  20   9    4 |    3   6  12  16   6   5  14   8    5
  15  |   3   5  13  12   6   5  13   5    3 |    5   7   8  12   9   8  12   4    4
  16  |   6  11  16  11   8   7  14   8    4 |   12  15  21  17  15  12  17  17   13
  17  |  10   8  11   9   6   4  12   8    4 |   15  14  16  13  13  10  18   9   11
  18E |   6   8  13  21   8   6  14   9    4 |    8  10  12  21  10   8  18   7    7
  19  |   4   7   8  10   7   5  17   8    3 |    4   7   8  12   8   8  13   7    5
  20  |   4   8  10  11   4   6  15  11    3 |    6   8  10  12   6   8  16  11    4
  21  |   2   8  15  11   4   5  18   9    4 |    3   9  10  11   6   5  16  10    4
  22  |  20  10  18  16   8   6  11   9    6 |   15  13  14  15   9   9  17  11    8
  23  |   3   7  11   4   9   6  16   8    3 |   14  15  16  16  15  16  15  16   13
  24  |   5   7  10   8   3   6  13   6    3 |    5   9  11  12   6   6  14   5    5
  25  |   6   8  12  10   6   7   9   6    3 |    5  10   9  11  10   7  10   8    6
  26E |   5  11  11  18   4   8  21   6    4 |   20  24  18  25  20  18  27  19   18
  27  |   5  10   8   8   5   4  17   5    3 |    4  12  10  12   6   6  11   6    6
  28E |   5  12  12  22   9   7  21  11    5 |    8  13  14  22   9   7  17   9    6
  29E |   6  12  11  16   8   6  17   7    4 |    7   9  12  16   8   8  18   9    6
  31E |   8  16  13  12   9   6  12  11    4 |    9  13  18  15  12   7  14   6    7
------|--------------------------------------|--------------------------------------
 RMS  |   8  10  12  13   7   6  21   9      |T   9  12  12  15  10   8  20  10    7
 WRMS |   5  10  11  12   6   6  22   7      |NE  7  10  12  12   9   8  13   9    6

Table 3.0845.4   GPS week: 0845   Day: 4   MJD: 50163.0

               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
------|--------------------------------------|--------------------------------------
   1E |   5  22  21  14  13   6  26  16    6 |    7  20  10  20  14   6  26  16    7
   2  |   4  13   7   6   7   3  12   7    3 |    4  14   9  12  10   6   9   5    5
   4  |   6  11  11   8   7   8  20   8    4 |    4  11  11  11  10   7  17   7    6
   5  |   4   6   9   7   3   3  11   8    3 |    5   5   9  11  10   5   9   5    3
   6E |  16  18  12  16  15   9  22  15    6 |   17  15  10  21  18   7  20  11    8
   7E |   3  15  11  12   8   9  22   9    4 |    9  20  10  19  10   7  22   8   10
   9  |   4   8   7   9   4   5  11   7    3 |    3  10   9  12  14   4   8   5    3
  12  |   3 --- --- ---   7 ---  11   9    5 |    6 --- --- ---  10 ---   9  11    7
  14  |   4  10   7  11   3   7  14  12    4 |    4   6   7  15  10   7  13   9    5
  15  |   5  12  13  10   7   8   9  11    4 |    5   8   8  11   8   6  11   8    4
  16  |   4  11  11  11  10   6  15   7    3 |    4  12  11  15   8   8  16   7    7
  17  |   4  10   9  11  13   6  13   8    3 |   13  15  18  14  22  11  17  13   12
  18E |   7  10  11  17   5   8  12   7    4 |    7  12  13  18  11   8  16   8    6
  19  |   5   8   8  10   4   5  15   5    3 |    3   7  10  10  10   7  12   4    4
  20  |   3   7   8   8   4   4   9   7    3 |    6   5   7  11   9   7   9   6    4
  21  |   3  11  10   7   7   6  15   8    3 |    4  15   8  12   9   5  13   9    5
  22  |   7   9  10  10   8   6  13   8    3 |   12  10  10   9  13   7  10   7    6
  23  |   5  11   8   5   6   6  13   5    3 |   12  13  13  14  13  12  12  13   11
  24  |   4   9   6   8   4   8  11   6    3 |    4   9   9  10   9   6  10   6    4
  25  |   3  14  11   9   7   5  12  10    3 |    7   7  10  12  15   4  13   8    5
  26E |   6  11  13  17   8   8  20   5    4 |   14  28  22  18  14  14  27  15   16
  27  |   4  12   8   9   6   7  14   6    3 |    3  11   9   9  12   7  10   5    5
  28E |   5  12   9  15  11  10  20  11    4 |    9  13  13  19  12   7  20   7    7
  29E |   8  11  10  14   6   6  11  15    4 |    6  11  11  16   9   7  14  10    5
  31E |   5  19  12  11  10   7  11  10    4 |    9  12  14  15  12   7  13   8    7
------|--------------------------------------|--------------------------------------
 RMS  |   6  12  11  11   8   7  15   9      |T   8  13  11  14  12   7  15   9    7
 WRMS |   4  12  10  10   7   7  16   8      |NE  6  10  10  11  11   7  11   7    6

Table 3.0845.5   GPS week: 0845   Day: 5   MJD: 50164.0

               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
------|--------------------------------------|--------------------------------------
   1E |   9  13  10  17  24   9  19  11    7 |    5  15  12  23  19   7  26   7    9
   2  |   8   9   8   9  13   5  12   8    5 |    8  11  13  12  19   7  12  11    9
   4  |  10   8   7   9  13   6  17   8    5 |    6   9  11  11  13   6  15   8    7
   5  |   5   4   6   5   6   3  11   8    3 |    4   5   9   9  12   7  12   4    6
   6E |  25  10   8  20  24   8  16  10    6 |   15  14   7  20  19   7  17   6    8
   7E | >>>  12  10 >>> >>> --- --- >>>   11 |    9  13   0  19  11 --- ---   8  ---
   9  |   5  10   6  10  18   8  10  10    5 |    3  13   5  11  13   5  11   8    5
  12  |  15 --- --- ---  29 ---   5  27    0 |    3 --- --- ---  20 ---  12  12   13
  14  |   7   5   5   9  19   5  14  16    4 |    4  10   8  15  23   5  15   7    7
  15  |   5   9  10  14  14   4  12   6    5 |    4   6   8  15  15   5  13   8    6
  16  |   6   6   9  12  31   7  11   8    5 |    6  11  12  17  31   9  16  11    9
  17  |   8   9   6  11  13   7  14   9    5 |    6  10   9  15  18   6  14   7    8
  18E |   9  15   6  19  16  10  17   8    7 |    9  10  10  18  18   8  17   7    8
  19  |   6   7   6  12  10   4  12   5    4 |    5   7   8  12  14   6  11   5    5
  20  |   6   4   5   9   8   4  11   6    3 |    6   5   7  12  15   5  12   7    4
  21  |   5   8   8  10  14   6  15  10    5 |    3   9   8  15  16   5  15   7    6
  22  |   5   7   7  11  19   6  13   9    5 |    6   7   9   8  23   6   9   8    5
  23  |   7  11   9   9  32   5  13   6    5 |   11  14  13  16  26  13  13  13   11
  24  |   6   8   5  11  14 ---  11   9    6 |    6  11  10  12  15 ---  14   7    8
  25  |   7   9   7  11  20   7  15   7    5 |    7   7   9  12  12   8  15   6    6
  26E |   8  10  13  16  13  10  22  10    8 |   15  24  13  21  24  16  29  14   17
  27  |   7   7   6  10  11   4  12   8    4 |    4  10   8   9  19   9  12   6    7
  28E |   5  11   9  18  30   8  14  10    6 |    6  12  11  20  17   6  19   6    7
  29E |   8  11   7  15   9   8  11   8    5 |    6  10  13  14  14   7  13   7    5
  31E |   8  16  10  14  24  10  15  11    7 |    8  12  13  14  17   9  14   9    8
------|--------------------------------------|--------------------------------------
 RMS  | 381  10   8 388 381   7  14 380      |T   7  11  10  15  18   7  15   8    8
 WRMS |  10   9   8 417 159   7  14 198      |NE  5   9   9  12  18   7  13   8    7

Table 3.0845.6   GPS week: 0845   Day: 6   MJD: 50165.0

               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
------|--------------------------------------|--------------------------------------
   1E |   5  13  19  17  19   7  23  10    5 |    5  16   7  22  11   6  21   6    6
   2  |   6  12   5   8  14   5  20   6    3 |    5  12   8  14  13   7  12   7    7
   4  |   3   8   9  10  10   8  21   8    4 |    8   8  11  12  10   7  12   7    6
   5  |   4   6   4   8   9   4   9   7    2 |    7   7   8  11  12   7  12   4    7
   6E |  19  14  15  13  18   7  19   9    6 |   14  15  11  14  14   8  20  10    8
   7E | --- ---   9 --- --- ---  24 ---   15 |  --- ---   5 --- --- ---   5 ---    4
   9  |   4   5   9  11  23   5  14   6    3 |    5   6   7  11  16   5  13   4    6
  12  |   5 --- --- ---  13 ---  22   8    7 |    5 --- --- ---  10 ---  11   8    6
  14  |   7   6   4  14   8   4   8   5    3 |    4   7   8  13  13   5  13   5    5
  15  |   3   9   7  10   9   4  10   6    3 |    4   7   7  12  10   8  11   3    5
  16  |   4  14  10   9  16   6  13   8    3 |    9  14  17  18  19  12  13  12   12
  17  |   6  10   6  10   8   5  14   5    3 |    5  13   9  11  15   8  15   6    7
  18E |   7  13   5  18  18   6  19   7    4 |    9  14   9  18  15   9  22   8    8
  19  |   4   9   5  10  20   5  11   5    3 |    5   8   7  10  11   7   8   5    4
  20  |   4   7   5  11   9   4  12   6    3 |    6   5   9  14  13   6  13   5    7
  21  |   3   7   7   8  14   4  12   6    3 |    4  10   9  12  11   7  16   6    6
  22  |   6  10   7   7  27   4  13   6    3 |    8  11   9  10  20   7  13   7    5
  23  |   5  13   7   7   8   6  17   5    3 |   16  15  19  18  20  18  16  16   16
  24  |   2   7   6   9  11 ---  13   8    3 |    6   9  10  13   8 ---  11   6    6
  25  |   6   8   9  10  13   6  14   5    3 |    6   9   8  13  10   5  12   5    6
  26E |   4  17  10  17   6   8  26   6    5 |   12  17  16  22  18  14  20  12   14
  27  |   4  12   4   8  10   4  17   6    3 |    4  13   7   9  10   6  11   5    5
  28E |   3  12  12  13  18   6  15   9    4 |    6  13  12  17  13   5  16   8    6
  29E |   7  12   5  14   8   5  15   7    3 |    6  11   8  14  11   6  14   8    5
  31E |   3  15   9  11  18   6  11   9    4 |    7  13  13  16  16   8  15   8    9
------|--------------------------------------|--------------------------------------
 RMS  |   6  11   9  12  15   6  16   7      |T   7  11  10  14  13   8  14   7    7
 WRMS |   5  11   7  11  13   6  16   6      |NE  6  10  10  12  13   8  12   7    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 4.0845   GPS week: 0845   MJD: 50159.0-50165.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2300 |U  52   36   91 |U  46   34   94 |   43   28   69 |
emr | emr 2270 |   42   28   69 |   34   24   77 |U  28   13   33 |
esa | esa 1960 |  111   56  156 |U  83   64  160 |   90   49  128 |
gfz | gfz 1145 |   47   30   70 |U  29   25   82 |   27   15   33 |
igp | igp 2002 |  382  382  396 |  380  379  387 |  379  378  381 |
igs | igs 2373 |   46   31   74 |   36   26   77 |   34   18   47 |
jpl | jpl 2213 |U  42   28   65 |U  32   21   63 |   30   13   33 |

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 5.0845.0   GPS week: 0845   Day: 0   MJD: 50159.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2342 |   56   39   98 |   56   39  103 |   43   28   71 |
emr | emr 2300 |   42   31   78 |   45   24   88 |   30   15   36 |
esa | esa 2052 |  111   51  181 |   82   42  138 |   56   42   95 |
gfz | gfz 1152 |   50   33   76 |   37   24   63 |   26   15   30 |
igp | igp 2286 |   45   32   76 |   43   26   84 |   28   16   39 |
igs | igs 2395 |   46   32   85 |   45   26   86 |   24   18   47 |
jpl | jpl 2266 |   43   31   71 |   42   25   80 |   28   15   33 |

Table 5.0845.1   GPS week: 0845   Day: 1   MJD: 50160.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2292 |   47   36   88 |   51   38   90 |   36   28   61 |
emr | emr 2301 |   36   27   74 |   32   24   75 |   28   16   39 |
esa | esa 2125 |  107   60  163 |   75   82  171 |  107   62  178 |
gfz | gfz 1152 |   33   25   74 |   35   27   89 |   30   20   43 |
igp | igp 2290 |   46   33   75 |   32   26   79 |   30   20   44 |
igs | igs 2384 |   43   32   79 |   34   27   75 |   33   21   54 |
jpl | jpl 2270 |   33   26   65 |   30   22   68 |   30   15   39 |

Table 5.0845.2   GPS week: 0845   Day: 2   MJD: 50161.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2325 |   46   32   72 |   44   30   92 |   34   27   65 |
emr | emr 2297 |   38   23   55 |   26   25   67 |   24   12   32 |
esa | esa 1915 |   76   40  117 |   60   44  110 |   48   23   44 |
gfz | gfz 1152 |   37   25   52 |   26   21   61 |   22   15   31 |
igp | igp 2274 |   39   28   53 |   24   23   65 |   23   13   34 |
igs | igs 2388 |   40   27   59 |   32   25   68 |   27   13   30 |
jpl | jpl 2272 |   35   24   48 |   24   23   65 |   20   11   28 |

Table 5.0845.3   GPS week: 0845   Day: 3   MJD: 50162.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2329 |   55   33   97 |   40   37   73 |   42   26   71 |
emr | emr 2220 |   47   28   69 |   28   27   67 |   24   13   33 |
esa | esa 1962 |  136   76  190 |   90   61  160 |   73   32  101 |
gfz | gfz 1152 |   48   30   61 |   22   28   48 |   23   14   34 |
igp | igp 2283 |   51   34   77 |   26   31   68 |   26   15   40 |
igs | igs 2380 |   46   31   74 |   28   28   56 |   28   12   42 |
jpl | jpl 2257 |   46   31   70 |   24   26   64 |   24   14   34 |

Table 5.0845.4   GPS week: 0845   Day: 4   MJD: 50163.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2282 |   63   40  104 |   39   31   88 |   48   28   68 |
emr | emr 2278 |   55   35   83 |   24   21   57 |   32   12   36 |
esa | esa 1945 |  118   48  118 |  105   70  190 |   72   38  106 |
gfz | gfz 1152 |   70   44   97 |   25   25   66 |   31   12   35 |
igp | igp 2213 |   88   59  127 |   33   38   78 |   43   18   54 |
igs | igs 2377 |   56   35   81 |   30   26   65 |   28   14   41 |
jpl | jpl 2259 |   56   34   82 |   21   18   53 |   37   13   37 |

Table 5.0845.5   GPS week: 0845   Day: 5   MJD: 50164.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2327 |   52   30   85 |   50   30   84 |   48   28   67 |
emr | emr 2288 |   32   26   65 |   43   22   59 |   27   12   25 |
esa | esa 1805 |  125   59  140 |   88   66  157 |  159   82  210 |
gfz | gfz 1152 |   39   27   67 |   28   21   55 |   28   16   28 |
igp | igp 1416 |   83  129  247 |   94   52  146 |   49   39  104 |
igs | igs 2396 |   52   34   76 |   46   27   65 |   54   28   65 |
jpl | jpl 2084 |   35   26   60 |   46   16   50 |   32   11   30 |

Table 5.0845.6   GPS week: 0845   Day: 6   MJD: 50165.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2204 |   46   41   86 |   42   34  122 |   45   26   76 |
emr | emr 2205 |   36   25   56 |   31   25  110 |   30   13   26 |
esa | esa 1919 |   95   52  164 |   74   70  183 |   59   34   84 |
gfz | gfz 1104 |   42   21   49 |   25   28  146 |   27   13   30 |
igp | igp 1254 |  999  999  999 |  999  999  999 |  999  999  999 |
igs | igs 2292 |   36   26   60 |   31   23  109 |   31   16   38 |
jpl | jpl 2083 |   42   24   55 |   31   18   56 |   33   13   28 |

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