Subject: [IGSREPORT-2738] Wk 0856 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 18 Jun 1996 7:19:37 PDT

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IGS Electronic Report    Tue Jun 18  7:19:37 PDT 1996      Message Number 2738
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0856 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0856   (Jun 02, 1996 - Jun 08, 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 (IGS08567.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:

 IGS08560-6.SP3  IGS GPS ephemeris files for days 0-6, week 0856 in SP3 format.
 IGS08567.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08567.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. 

5. PRN23 was set unusable from day 1 (Jun 3) starting at 11:45 until day 2
   (Jun 4) at 00:05 (ref. NANU 102-96156). This explains higher clock RMS
   seen for NGS on day 1. 
   Higher clock RMS for NGS on day 3 (Jun 5) was caused by clock jumps on PRN02.
   No NANU was issued regarding its health.

6. 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
                    -------------+------+--------
                     4 (Jun 06)  | ALL  | EMR (a)

   (a) Z-rotation problems that affected the combined solution (see Table 2).

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
         ------------+----------+-------+------------------------------
          3 (Jun 05) | 00:00:00 |  17   |   ALL    | Modelling problem
          3 (Jun 05) | 12:00:00 |  18   |   ALL    | Modelling problem
          4 (Jun 06) | 00:00:00 | 23,29 |   ALL    | Modelling problem (a)
          5 (Jun 07) | 00:00:00 | 14,16 |   ALL    | Modelling problem
                                |  19   |                              

   (a) There might have been a maneuver on PRN29 on day 3 (Jun 5). No NANU 
       issued.

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

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of combination strategy, please refer to the report
posted on CDDIS (IGS08567.SUM).

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08567.SUM).

Table 1: Week 0856 summary.                       (Jun 02, 1996 - Jun 08, 1996)

Table 1.0856.a   GPS week: 0856   MJD: 50236.0-50242.0

         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  70 | .00  .02  .01  -.41   .01  -.44   .2  .06  .05 |   -1.0   -5.2    1.6
        | .00  .00  .01   .10   .07   .13   .1           |    4.5    7.6
emr  28 | .00 -.01  .00   .52   .08   .71   .0  .11  .11 |  100.0   21.9     .8
        | .00  .01  .01   .11   .09   .47   .1           |  238.8   20.2
esa  50 | .00  .00  .00  -.12  -.02   .18   .1  .13  .11 |  -13.5   29.9    3.0
        | .01  .01  .01   .17   .14   .15   .1           |   18.4   20.0
gfz  49 | .00 -.02  .00   .04   .25   .04  -.2  .09  .08 |  100.0   31.2     .7
        | .01  .01  .00   .13   .10   .16   .2           |  267.2   17.1
igp  n/a| .00  .00  .00   .23   .01   .28   .0  .09  .06 |     .9   -2.0     .9
        | .01  .01  .01   .18   .12   .16   .1           |    1.2    2.4
jpl  37 | .00  .01  .01  -.06   .12   .23   .2  .07  .07 |  100.0   20.1     .8
        | .00  .01  .01   .10   .11   .15   .1           |  863.4   17.8
ngs  47 | .01 -.06 -.02   .06  -.19  -.16  -.3  .15  .15 |  100.0  100.011137.0
        | .00  .01  .01   .22   .22   .13   .1           |  929.2 1307.5
sio  113|-.01  .01 -.01   .38  -.42  -.10  -.1  .09  .09 |     .0     .0     .0
        | .01  .01  .01   .14   .08   .22   .1           |     .0     .0

Table 1.0856.b   GPS week : 0856   MJD: 50236.0-50242.0

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

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 2.0856.0   GPS week: 0856   Day: 0   MJD: 50236.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  70 | .00  .01  .01  -.26   .10  -.58   .2  .06  .05 |     .4   -1.2    1.7
emr  28 |-.01 -.01  .00   .44   .08   .50   .2  .10  .09 |  469.5   36.6     .9
esa  50 | .00 -.02 -.01  -.26   .05   .29   .0  .11  .10 |  -11.3   26.5    2.5
gfz  50 | .00 -.02  .00  -.04   .11  -.02  -.4  .09  .08 |  470.7   37.0     .7
igp  n/a| .00  .01 -.02   .09  -.09   .17  -.1  .06  .06 |    1.2   -1.8     .9
jpl  37 | .00  .03  .01  -.19   .01   .11   .2  .07  .07 |  470.1   37.6     .9
ngs  47 | .01 -.07 -.03   .09  -.12  -.26  -.4  .14  .14 |   -2.9    4.3   78.9
sio  113|-.01  .01 -.01   .36  -.33   .24  -.2  .07  .07 |     .0     .0     .0

Table 2.0856.1   GPS week: 0856   Day: 1   MJD: 50237.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 | .00  .02  .01  -.29   .05  -.55   .3  .08  .06 |   -2.8   -3.1    1.5
emr  30 |-.01 -.01  .00   .40   .21   .58   .0  .09  .09 |  505.5   32.8     .7
esa  48 |-.02  .00 -.01  -.11   .05   .31   .1  .13  .11 |   -5.4   52.3    3.0
gfz  50 | .01 -.02  .00  -.15   .18  -.23  -.5  .08  .07 |  507.1   32.8     .7
igp  n/a| .00  .00  .00   .05  -.12   .15  -.1  .17  .06 |    2.2   -3.9     .8
jpl  37 | .00  .02  .01   .03  -.02   .20   .2  .07  .07 |  506.3   33.5     .7
ngs  46 | .01 -.06 -.01  -.05  -.30  -.18  -.4  .14  .14 |  117.8 -198.3  946.8
sio  112|-.01  .00 -.01   .22  -.46   .05  -.1  .11  .11 |     .0     .0     .0

Table 2.0856.2   GPS week: 0856   Day: 2   MJD: 50238.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  71 | .00  .02  .01  -.47   .09  -.38   .1  .05  .05 |   -4.2  -18.3    1.6
emr  29 | .00 -.02 -.01   .66   .09   .71  -.1  .10  .10 |  539.0   18.9     .8
esa  49 |-.01  .00 -.01  -.12  -.05   .17   .1  .11  .10 |  -18.6   -1.1    2.5
gfz  49 | .00 -.02  .00  -.02   .29   .14  -.2  .08  .07 |  540.4   19.3     .7
igp  n/a| .00 -.01  .00   .31  -.14   .17   .1  .05  .05 |    1.8   -6.1     .8
jpl  37 | .00  .01  .00   .02   .12   .21   .2  .07  .07 |-1262.1   -6.6     .7
ngs  46 | .01 -.04 -.01   .02  -.55  -.37  -.2  .14  .14 |    1.4  -15.1   78.1
sio  114| .00  .01 -.01   .50  -.36  -.20  -.1  .07  .07 |     .0     .0     .0

Table 2.0856.3   GPS week: 0856   Day: 3   MJD: 50239.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  70 | .00  .02  .01  -.40  -.01  -.31   .2  .05  .04 |   -7.8    6.6    1.6
emr  28 | .00 -.02  .00   .67  -.08  1.06   .1  .13  .14 |   85.6    4.1     .8
esa  50 | .01  .00  .00  -.21   .05  -.02   .1  .13  .10 |  -51.9   58.0    5.2
gfz  49 |-.01 -.01  .00   .26   .21   .16  -.2  .11  .11 |  570.7   53.9    1.1
igp  n/a| .01 -.02  .00   .51   .05   .58   .0  .09  .08 |    -.2     .1     .9
jpl  37 | .00  .00  .00  -.13   .31   .08   .0  .10  .10 |-1257.8   24.5     .8
ngs  48 | .01 -.07 -.02   .11  -.12   .01  -.5  .17  .17 |-2437.0 3419.029450.0
sio  117|-.02  .02 -.01   .58  -.52  -.28  -.2  .12  .12 |     .0     .0     .0

Table 2.0856.4   GPS week: 0856   Day: 4   MJD: 50240.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  69 | .00  .02  .01  -.51  -.04  -.28   .0  .08  .05 |   -1.6   -5.0    1.8
emr  28 | .00 -.01 -.01   .49   .07  1.56   .0  .18  .15 |   82.3  -14.1    1.0
esa  52 |-.01  .00 -.02  -.13   .16   .03   .4  .18  .12 |    2.3   29.4    2.6
gfz  47 | .00 -.03  .00   .12   .30   .19   .0  .09  .09 |     .0     .0     .0
igp  n/a| .00  .00  .00   .35   .17   .43  -.1  .06  .05 |     .2    -.4    1.2
jpl  37 | .00  .02  .01  -.07   .18   .13   .1  .07  .08 |-1242.1    5.9    1.0
ngs  50 | .01 -.07 -.02   .47  -.02  -.17  -.2  .16  .18 |   -3.0   -2.5   79.2
sio  112|-.01  .01 -.01   .45  -.50   .07  -.2  .08  .08 |     .0     .0     .0

Table 2.0856.5   GPS week: 0856   Day: 5   MJD: 50241.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  70 | .00  .01  .00  -.48  -.03  -.40   .2  .06  .05 |    5.2   -6.4    1.6
emr  27 | .00 -.02 -.01   .49   .12   .12   .0  .09  .09 |   20.4   37.5     .7
esa  52 | .00  .01  .02   .25  -.30   .13   .0  .15  .12 |    1.2   25.6    2.0
gfz  48 | .00 -.02  .00   .06   .20   .14  -.3  .08  .08 |   21.8   37.8     .6
igp  n/a| .00  .00  .00   .28   .10   .20   .1  .06  .05 |    2.0   -2.5     .7
jpl  37 | .00  .01  .01  -.15   .09   .49   .3  .07  .07 |-1229.9    7.7     .6
ngs  47 | .01 -.04 -.02  -.01   .10  -.01  -.2  .15  .15 |    1.4   -2.6   76.8
sio  111| .00  .02  .00   .28  -.44  -.27  -.1  .06  .06 |     .0     .0     .0

Table 2.0856.6   GPS week: 0856   Day: 6   MJD: 50242.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  70 | .00  .01  .00  -.46  -.10  -.61   .2  .07  .06 |    3.6   -8.8    1.6
emr  28 | .00 -.01  .00   .47   .09   .47  -.2  .08  .08 |   56.5   37.6     .8
esa  52 | .00  .01  .00  -.25  -.07   .37   .1  .10  .09 |  -11.0   18.6    1.8
gfz  48 | .00 -.01  .00   .05   .42  -.09  -.2  .09  .08 |   57.9   37.8     .8
igp  n/a| .00  .00  .00   .03   .07   .23   .0  .06  .05 |    -.7     .6     .9
jpl  37 | .00  .01  .01   .07   .13   .36   .2  .06  .06 |   57.5   38.2     .9
ngs  48 | .02 -.05 -.02  -.23  -.33  -.11  -.1  .13  .13 |   -3.8    5.6   79.7
sio  110| .00  .01  .00   .26  -.30  -.31   .0  .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 3.0856.0   GPS week: 0856   Day: 0   MJD: 50236.0

               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  |   4   5  12   5   5   6  11  12    3 |   10  10  10  10   7   9  12   8    8
   2E |   6  10  10   8  10   7  16   9    4 |   13  16  16  15  14  11  15  13   12
   3  |   6   7  11   5   5   7  17   7    3 |    9   8  10  10   9  15  17  10    8
   4E |   6  11  13  15   5   8  12   7    4 |   10  15  14  15  11  10  18  13   10
   5E |   6   9  12   7   4   6  15   7    3 |   11  20  15  21  15  16  25  16   16
   6  |   4   6   7   7   7   6   9   5    2 |    4  10  10  10   6   5  12   9    6
   7  |   6  11   8   8   6   4  14   6    3 |    6   9   9  10   6   7  12   7    6
   9  |   5   9  14  10   5   5  12   5    3 |    6  12  12  12   7   9  15   7    7
  14  |   6  15  12   5   5   6  12   9    4 |    8   6  14   4   6   7   9   6    5
  15E |   4   7  13   9   5   7  15   7    3 |    8  12  18  14   9  10  19  10    9
  16  |   4   8   9   7   4   7  24   7    4 |    5   6  14   5   5   7  18   7    5
  17E |   7  14  15  11   8   9  16  10    4 |    5  12  16  10   5   7  20   9    6
  18  |   4   9   7   7   3   6  11   6    3 |   12  16  14  16  11  11  17  14   12
  19  |   6  11  10   7   3   8  10   5    3 |    7  13   6  12   4  11  12   7    4
  21  |   5   8  11  15   6   8   8   5    4 |    5  10   7  16   9   7   8   7    6
  22E |   5   7  10   5   3   5  12   5    3 |   11  12  16  14  13  16  14  11   12
  23  |  12  12  15   8   7  10  17  10    5 |   61  55  56  56  69  62  57  61   60
  24E |   8  16  12  21   6   9  18   6    5 |   13  15  17  21  16  13  31  10   13
  25  |   4   9  13   5   5   7  10   7    3 |    5   9  10   9   7   6  14   5    5
  26  |   4   7   9   6  10   6  16   9    3 |    9  12  14  13  11  12  17  12    9
  27  |   3   9   8   8   6   7  11   6    3 |    6  10  10   9   5   8  12   5    5
  28  |   5   8  11   6   4   4  10   5    3 |    5   9   9   8   7   9  14   6    6
  29  |   4   7   8   6   5   6  22   6    3 |    2   6   4   9   3   6   9   6    3
  31  |   5   5  11   6   6   6  10   7    3 |    7   8  10   9   8  10  11   6    6
------|--------------------------------------|--------------------------------------
 RMS  |   6  10  11   9   6   7  14   7      |T  14  16  16  16  16  16  19  15   14
 WRMS |   5   9  10   8   6   7  14   7      |NE 16  16  17  17  18  17  18  16   15

Table 3.0856.1   GPS week: 0856   Day: 1   MJD: 50237.0

               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   9  15   6   6   6   9  25    5 |    6   8   9   6   5   9   9  23    6
   2E |   6  11   6   8   7   7  17  11    4 |   11  12  13  14  16  12  20  10   11
   3  |   5   8   9   5   4   7  14   6    3 |    9   8   9  10   9   8  14   6    6
   4E |   8   9  12  12   8   7  10  11    4 |   15  15  14  20  18  13  25  14   15
   5E |   4   6  14   7   4   6  12   8    3 |    9  11  16  11  10   8  17   8    9
   6  |   4   8   8   5   6   6   8  16    3 |    4   9   8  10   8   6  15  15    5
   7  |   6   8   7   7   4   7  16   5    3 |    5   9   8  10   9   8  19   4    8
   9  |   6   8  12   6   6   7   9   9    3 |    6  12  12   9   9   9  12   9    7
  14  |   5  13  13   5  10   6   7  16    4 |    7  10  11  11   8   8  14  18    7
  15E |   8   8  13   8   6   6  16  11    4 |    9  11  14  12   7   7  17   9    7
  16  |   4   9  10   6   5   8  23   6    4 |    4   9  10   8   4   6  22   6    6
  17E |   8  13  18   9   6   9  13  14    5 |    6  15  20  10   9   7  19   9    8
  18  |   6   8  12  10   5   6  15   7    4 |   17  13  14  17  17  17  24  15   16
  19  |   6   9   6   8   4   9  14   8    3 |    6  14  10  12   6   7  18   7    6
  21  |   6   8  15  12   6   8   9   5    4 |    6  11   7  13   9  10  12   8    7
  22E |  11   7  13   6   4   6  13   7    4 |   12  14  12  13  11  10  14  12    9
  23  |  22  10  35 ---  81  11  23  20    9 |   73  85  66 --- 109  64  68  65   66
  24E |  10   9  11  17   6   8  16   6    5 |    9  15  12  17  14  12  26  10   13
  25  |   4   8  10   6   6   7  12  13    3 |    5   7   9   8   7   6  14  10    5
  26  |   7  11   9  10  10   8  12   9    4 |    9  13   9  16   9   8  11   8    7
  27  |   4   8  11   6   4   7  11   7    3 |    6   8   9   8   6   6  12   5    5
  28  |   8   7   7   5   4   6  12   6    3 |    8   7   7   6   5   8  13   7    5
  29  |   5   5   8   6   5   6  20   6    3 |    2   8   4  11   5   4   9   4    4
  31  |   7   5   8   7   4   6  12   9    3 |    9   8  11   8   7   7  16   7    6
------|--------------------------------------|--------------------------------------
 RMS  |   8   9  13   8  17   7  14  11      |T  17  20  17  11  24  15  21  16   15
 WRMS |   6   9  11   7   6   7  14  11      |NE 19  22  18  10  27  17  22  18   17

Table 3.0856.2   GPS week: 0856   Day: 2   MJD: 50238.0

               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   9  13   6   7   7  12  11    4 |    8  10  11  11  10  10  12  10    7
   2E |   4   9   7   9   9   7  11   8    3 |    9  14  12  12  16  12  16   8   10
   3  |   5   8   6   6   3   8  17   8    3 |    5   7   8  10   6   8  18   9    5
   4E |   6  11  11   9   4   7  14   8    4 |    9  15  11  15  10   9  20  10    9
   5E |   5  10  15  11   4   4  13   7    4 |    8  15  11  17  10  10  19   8   11
   6  |   6   9  10   7   5   4  12   6    3 |    4  11   7  11   7   8  12   5    6
   7  |   6   9   7   9   5   5   7   6    3 |    5  10   7  13  10   6  10   7    6
   9  |   5  10  11   8   4   6  14   7    3 |    7  12  15   9   7   8  16   9    6
  14  |   5  18  14   6   3   7  10   9    4 |    7   9  13   9   8   9  12   8    5
  15E |   4   8  15   8   6   8  20   9    4 |    7  11  13  12   7   8  17   7    7
  16  |   3   6  13   8   3   6  12   7    3 |    7  11  14  15   9   9  18   5    8
  17E |   6  13  14   9   4   8  16  11    4 |    8  15  17  12   9   8  19  10    8
  18  |   4   6  12   4   5   6  13   5    3 |   20  16  21  19  14  16  21  16   17
  19  |   7  11   7   8   4  10  10   6    3 |    7  15  11  15  11   9  18  10    7
  21  |   4   6   9   9   4   6  13   7    3 |    5   8   8  11   7   8  14   5    4
  22E |   6   7  12   6   2   5  13   5    3 |    8   9  12  11   8   9  15   8    7
  23  |   5   7  14  11   8   6  24   7    4 |   61  55  55  53  74  57  61  55   58
  24E |   5  12  11  18   5   6  12   7    4 |    8  15  12  18  15  12  21  10   11
  25  |   3   8  11   6   3   6  12   7    3 |    4  10  11   8   8   7  12   4    5
  26  |   4   8   9   8   8   6  11   8    3 |   11  10  10  16  11  10  11  12    8
  27  |   3  13   9   5   4   9   9   6    3 |    5  16   8  11   7   7  12   7    5
  28  |   5  10   5   4   5   4  16   4    3 |    5  13   9   8   8  10  15   7    7
  29  |   4   6   9   4   6   6  19   5    3 |    3   9   5  10   4   7  12   4    4
  31  |   4   7  15   7   5   5  14   5    3 |    6   7   8   8   5   7  14   4    5
------|--------------------------------------|--------------------------------------
 RMS  |   5  10  11   8   5   7  14   7      |T  14  16  15  16  17  14  19  13   14
 WRMS |   5  10  10   7   5   7  14   7      |NE 16  17  17  17  19  16  20  15   15

Table 3.0856.3   GPS week: 0856   Day: 3   MJD: 50239.0

               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  |   4  12  15   8   5   7  10  10    4 |    8  11  10   8   9   9  10  11    7
   2E |   4  11   8  10   8   6  14  13    3 |   12  14  16  15  12  11  15  14   11
   3  |   6  10   7   7  13   9  11   8    3 |    7  11   8   9  14  10  13   9    5
   4E |   4  20  11  15   6   8  17  15    5 |   11  19  15  18  15  13  21  16   11
   5E |   4  12  14  11   5   5  24   8    4 |    9  12  12  11  11  10  24   8    8
   6  |   5   8  12   9   5   6  12  12    3 |    5  11   9  12   8  10  15  11    6
   7  |   3  12   8  13  10   5   9  12    3 |    4  10  10   9  10   6  14  12    5
   9  |   5  13  11   7  10   7  13   7    3 |    7  15  13  10  15  11  17   9    8
  14  |   4  13  15  10   6   9  20  15    4 |    7  18  18  11   9  10  20  15    8
  15E |   5   9  20  11   6  11  25  11    5 |    9  11  14  14  10  15  27  19   10
  16  |   3   9   9  15   8   5  12   5    3 |    6   8  11  12   7   7  19   5    6
  17E |   6  12  11  13  11   7  15  11    4 |   10  18  11  12   9  11  14  10    9
  18  |  15  35  25  15  15  28  38  26   10 |   33  46  26  33  24  31  61  49   37
  19  |   5  12  15   8   6  11  14  11    4 |    8  20  13  20  13   9  28  10   10
  21  |   4   8   8  12   9   5  12   9    3 |    7  10  10  10  10   9  10  14    7
  22E |   4  14  11  10   7  11  10  11    4 |    8  21  15  12  12   9  12  15    9
  23  |   4  13  14   9  18  11  31   9    5 |   46  47  44  43  44  46  53  46   46
  24E |   4  13  11  17   8   7   9   7    4 |   11  17  16  20  15  15  23  15   13
  25  |   3  10  13  11   7  11  11  17    4 |    5  12  13   8   7   7  12  14    5
  26  |   5  12   8  11   7   4  15  12    4 |   10  17  11  13  14  11  19  11    9
  27  |   4   7  12   7   5   7  12   8    3 |    7  12  16  12   8   6  19   9    7
  28  |   5  12   7   8   7   8  17   5    3 |    6  14   9  11  10  13  15   9    7
  31  |   4   7  17  12  11   7  10  10    4 |    4  10  11  12  14  10  12   6    5
------|--------------------------------------|--------------------------------------
 RMS  |   5  13  13  11   9  10  17  12      |T  14  19  16  16  15  15  24  18   14
 WRMS |   4  14  10  11   8  10  17  12      |NE 15  20  16  17  16  16  25  19   16

Table 3.0856.4   GPS week: 0856   Day: 4   MJD: 50240.0

               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  15  10   7   5   5  17   6    3 |    6  13   9   9   8   8  15   6    6
   2E |   9  12  19  12   7   6  12  12    5 |   12  14  14  14  15  10  18  11    9
   3  |   6   8   8   8   4   6  11   4    3 |    5  10   9  14   8   9  13   7    6
   4E |   3  12   7   9   8   6  14   7    3 |    9  13  12  16  13  10  25   9   10
   5E |   5  14  18   6   6   5  12   5    3 |    8  13  11  12   9   7  17   8    8
   6  |   5  18  20   7   3   5   9   5    3 |    5  17  12  11   7   6  11   6    5
   7  |   4   6  10  11   3   4  10   6    3 |    7   7  12   9   7   7  11   7    6
   9  |   3  16  13   9   3   4  13   5    3 |    5  13  11  11   8   8  17  11    7
  14  |   8  21  46   9   4   5   9   8    6 |    5   9  21  18   8   8  11   8    7
  15E |   9  14  17   8   6   5  24   7    5 |    8  13  15  14  10   8  21   8    8
  16  |   5  14  29   6   5   5  15   6    4 |    6  10  30   7   5   7  14   7    5
  17E |   6  20  13  15   6   7  14   5    4 |    8  20  12  11   9   7  17   8    7
  18  |   9  16  15   6   4   9  15   8    4 |   12  21  19  18  12  15  26  18   13
  19  |  30  40 ---  18   9  24  35  24   13 |   26  33 ---  29  24  41  45  33   26
  21  |   4   9  10   7   6   6  10   3    3 |    5  10  10  11   8  10  11   9    7
  22E |   5   9  15   7   3   4  11   4    3 |    9  14  11  14   7   9  18   8    8
  23  |   3   8  17  12   4   7  18   5    4 |   30  28  24  33  29  30  20  32   29
  24E |   3  12  19  12   8   6  14   9    4 |   10  15  16  16  12  11  20  11   10
  25  |   3  18  12   7   4   7  10   5    3 |    5  15  10   9   7   7  14   7    6
  26  |   3  12  10   8   6   7  18   5    3 |    7  11  10  11  10   8  23  12    8
  27  |   6  11  24   6  10   6  19   9    5 |    7  13  15   9  12   7  22   7    6
  28  |   4   9  10   6   3   4  12   5    3 |    4   9  13  10   8   6  14   6    6
  29  |   6  47 ---   9   6 ---  20   6    5 |    4  30 ---  13   7 ---   7   6    5
  31  |   5   9  12   9   6   6  12   5    3 |    3   9  15  12   7   5  14   5    5
------|--------------------------------------|--------------------------------------
 RMS  |   8  18  18   9   6   7  16   8      |T  10  16  15  15  11  13  19  12   10
 WRMS |   5  15  12   9   5   8  18   8      |NE 11  17  15  15  12  14  18  13   11

Table 3.0856.5   GPS week: 0856   Day: 5   MJD: 50241.0

               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  |   4   8  13   6   3   6   9   4    3 |    6   9   9   9   6   5  11   8    6
   2E |   7   4  10  10   5   6   9   7    3 |   10   8  11  14  11   9  15  10    9
   3  |   4   8  13   4   4  10  13   6    3 |    5   8  12  11   9   8  16   9    6
   4E |   6   6  18  10  14   7  17   8    4 |   10  17  19  15  12   9  23  10   10
   5E |   7  10  20   7   5   7  14   5    4 |    8  15  12  11   9   7  15   7    7
   6  |   7   6  12   7   2   4  12   5    3 |    5  10  13   8   7   7  16   5    5
   7  |   5   8   8   9   8   5   7   4    3 |    5   6   8   7   6   4   9   4    4
   9  |   5   9  10   4   4   4  10   8    3 |    8  13  14  11  11   7  22  10    9
  14  |   7   7 ---   8  12  13  19   8    4 |    6  11 ---  10  12  10  14   8    6
  15E |   6  10  18   6   5   8  23   7    4 |    7  14  12  10   7   5  17   9    6
  16  |   5   6 ---   5   6   5  10   9    3 |   10   8 ---   7   7   7  11   4    7
  17E |   7  15  15   9   7   6  19   7    4 |    7  22  15  10  12   7  15   6    8
  18  |   5   6  11   5   5   4  10   7    3 |    7   9  14   9   8   8   7   7    6
  19  |   5  15 ---   8   4   7   9   5    4 |   12  14 ---  13  10  10  11  10   10
  21  |   4   6   9  10   6   6  12   6    3 |    6   8  11  11   8   7  15   9    7
  22E |   5   7  11   8   5   5   8   6    3 |    8  13  10  12   8   7  15   7    8
  23  |   6  12  16   9   6   9  38   7    5 |   49  46  45  50  47  51  51  48   48
  24E |   7  11  22  16   5   6  13   5    4 |   10  17  15  15  11  10  20  11   11
  25  |   5   5  14   6   5   5  13   8    3 |    4  11   9   7   6   5  15   8    4
  26  |   5  11   9   6   5   4  10   6    3 |    6  13  10  10   8   7  12  10    6
  27  |   3   8  27   6   6   4   7   6    3 |    6  11  18   9   5   4  11   7    5
  28  |   6   8   7   6   7   7  13   5    3 |    4  10  10   8   7  10  12   5    6
  29  |   6  14  17   6   4   6  19   5    4 |    3  15  10   9   6   7  10   8    4
  31  |   4   6  19   7   3   6  12   6    3 |    4   8  17   9   6   4  15   5    4
------|--------------------------------------|--------------------------------------
 RMS  |   6   9  15   8   6   7  15   6      |T  12  15  15  14  12  12  17  12   11
 WRMS |   5   9  12   8   5   7  15   6      |NE 13  15  16  15  13  14  17  13   13

Table 3.0856.6   GPS week: 0856   Day: 6   MJD: 50242.0

               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   6   9   7   5   5  11   6    3 |    9  10  11  10  10   9  16   8    8
   2E |   7   6   8   8   7   6  12   5    3 |   13  16  17  16  17  13  18  13   14
   3  |   4   8   9   4   4   7  11   7    3 |    6   9   9  10   7   8  15   9    6
   4E |   7   5   8  14   9   7  13   8    4 |   11  14  14  16  13  12  21  18   11
   5E |   8  10  11   5   5   6  12   7    3 |   10  11  13  10  11  10  20  12   11
   6  |   6   6   7   6   5   5  14   5    3 |    6  12  11  11   8   7  16   9    8
   7  |   5   5   9   8   6   5  15   6    3 |    5   6  11   9   7   6  12   9    6
   9  |   5   9   9   4   4   5  11   5    3 |    8  13  12  13   9  10  21  13   10
  14  |   7   9  19  10   4   5   9  10    4 |    6   7   3   7   8   4  12   8    4
  15E |   5   7  13   4   4   6  19   7    3 |    7  10  14  12  10   9  19  11    8
  16  |  12   9  10   9   4   4  11   9    4 |    9   7  12   6   6   5  10   5    5
  17E |  11  17  12  13   5  10  24  10    6 |    7  18  12   9   9   9  18   8    7
  18  |   6   8  11   9   4   4  12   8    3 |    6  12   9  11   8   7  12   8    7
  19  |   9   9  14   8   7   7  12   5    4 |    5   9  22   9   6   5   9   5    4
  21  |   6   8   7   7   5   4  10   8    3 |    7  10  11  11   9  10  13  12    9
  22E |   6   6   9   9   4   5  11   5    3 |    8  11  12  11   9   8  16  10    9
  23  |   6  11  15   8   7   6  17   7    4 |   51  57  44  53  52  52  55  52   51
  24E |   8   8   9  16  10   6  12   7    4 |   11  17  16  17  15  13  22  15   14
  25  |   4   4   6   6   6   6   9   7    2 |    5   9  10  10   7   7  16   9    7
  26  |   7   7  10  12   6   5  15   6    3 |    9  14  12  15  11   9  19  11   10
  27  |   4   8   9   7   8   4  10   4    3 |    6  12  15  14   9   8  14   8    8
  28  |   6   9   7   7   4   4  13   4    3 |    4  15  10  13  11   8  20   7   10
  29  |   5   9   7   7   3   5  19   6    3 |    3  18   9   8   6   8   8   6    4
  31  |   5   6   7   4   4   6   8   5    2 |    5   9  12   8   7   6   9   6    5
------|--------------------------------------|--------------------------------------
 RMS  |   7   8  10   9   6   6  13   7      |T  12  16  15  15  14  13  19  14   13
 WRMS |   6   8   9   8   5   6  13   7      |NE 13  17  15  16  14  14  19  15   14

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 4.0856   GPS week: 0856   MJD: 50236.0-50242.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2280 |U  57   36   89 |U  60   46  113 |   48   30   78 |
emr | emr 2274 |   45   30   78 |   41   34   82 |U  26   15   39 |
esa | esa 1869 |  100   51  161 |U 111   81  208 |   90   57  148 |
gfz | gfz 1138 |   46   30   81 |U  48   35   82 |   22   14   35 |
igp | igp 2284 |   45   31   75 |   43   38   87 |   28   17   44 |
igs | igs 2285 |   53   30   84 |   44   37   89 |   30   17   47 |
jpl | jpl 2243 |U  43   28   74 |U  40   34   82 |   24   13   37 |

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 5.0856.0   GPS week: 0856   Day: 0   MJD: 50236.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2300 |   55   35   93 |   52   51  114 |   46   24   78 |
emr | emr 2298 |   48   28   82 |   38   36   74 |   30   15   39 |
esa | esa 2092 |   68   47  152 |   77   60  151 |   76   33  137 |
gfz | gfz 1152 |   40   24   77 |   42   22   62 |   25   14   41 |
igp | igp 2294 |   45   27   76 |   38   35   76 |   32   15   45 |
igs | igs 2304 |   46   27   87 |   38   38   83 |   32   13   45 |
jpl | jpl 2279 |   45   26   79 |   36   33   73 |   28   13   40 |

Table 5.0856.1   GPS week: 0856   Day: 1   MJD: 50237.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2245 |   49   31   79 |   61   53  122 |   55   32   86 |
emr | emr 2236 |   39   25   72 |   31   39  103 |   26   13   36 |
esa | esa 1989 |   71   34  136 |  109  111  234 |   92   81  123 |
gfz | gfz 1104 |   33   26   61 |   27   44  127 |   22   11   35 |
igp | igp 2233 |   36   26   67 |   34   40  104 |   28   14   38 |
igs | igs 2271 |   39   24   74 |   39   43  106 |   32   17   43 |
jpl | jpl 2245 |   36   25   67 |   32   38  103 |   25   11   33 |

Table 5.0856.2   GPS week: 0856   Day: 2   MJD: 50238.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2303 |   52   35   88 |   48   34   93 |   42   30   78 |
emr | emr 2303 |   40   30   67 |   30   27   63 |   26   16   35 |
esa | esa 2051 |   68   42   93 |   65   47  131 |  118   64  172 |
gfz | gfz 1152 |   34   32   57 |   31   32   62 |   21   14   30 |
igp | igp 2284 |   38   28   65 |   32   27   64 |   28   18   42 |
igs | igs 2304 |   40   28   63 |   32   28   64 |   35   21   50 |
jpl | jpl 2276 |   38   28   62 |   28   28   57 |   24   13   35 |

Table 5.0856.3   GPS week: 0856   Day: 3   MJD: 50239.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2200 |   53   35   80 |   74   43   95 |   36   27   71 |
emr | emr 2207 |   38   30   73 |   54   35   68 |   27   17   43 |
esa | esa 1488 |  108   62  172 |  154  105  320 |  110   61  222 |
gfz | gfz 1104 |   37   30   70 |   83   54   84 |   21   18   35 |
igp | igp 2278 |   39   31   67 |   62   57   98 |   28   21   51 |
igs | igs 2208 |   43   27   72 |   60   38   81 |   25   16   49 |
jpl | jpl 2174 |   36   26   68 |   55   34   60 |   23   13   42 |

Table 5.0856.4   GPS week: 0856   Day: 4   MJD: 50240.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2302 |   54   37   88 |   63   64  148 |   50   39   79 |
emr | emr 2295 |   43   32   68 |   50   47  114 |   24   14   40 |
esa | esa 1803 |  135   79  243 |   79   91  191 |   71   49  129 |
gfz | gfz 1152 |    0    0    0 |    0    0    0 |    0    0    0 |
igp | igp 2300 |   47   33   68 |   50   48  114 |   27   17   51 |
igs | igs 2303 |   74   38   92 |   49   52  121 |   28   18   53 |
jpl | jpl 2179 |   45   32   65 |   43   52  121 |   22   14   37 |

Table 5.0856.5   GPS week: 0856   Day: 5   MJD: 50241.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2304 |   60   40   88 |   53   38  110 |   55   30   70 |
emr | emr 2303 |   35   30   76 |   36   23   74 |   28   15   38 |
esa | esa 1741 |   79   31   93 |  165   42  193 |   83   48   99 |
gfz | gfz 1152 |   42   34   91 |   28   18   63 |   21   13   35 |
igp | igp 2303 |   38   32   81 |   38   22   72 |   28   16   41 |
igs | igs 2304 |   40   28   78 |   40   22   80 |   28   14   36 |
jpl | jpl 2274 |   36   28   76 |   36   20   75 |   26   13   36 |

Table 5.0856.6   GPS week: 0856   Day: 6   MJD: 50242.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2303 |   73   40  104 |   63   31  101 |   48   26   80 |
emr | emr 2277 |   63   34  101 |   39   24   65 |   23   15   39 |
esa | esa 1920 |  139   48  182 |   81   83  182 |   65   49  123 |
gfz | gfz 1152 |   74   33  112 |   52   27   73 |   21   12   35 |
igp | igp 2299 |   63   35   98 |   41   23   64 |   22   16   41 |
igs | igs 2304 |   76   33  111 |   46   28   76 |   27   18   50 |
jpl | jpl 2275 |   61   32   95 |   41   25   66 |   20   15   33 |

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