Subject: [IGSREPORT-2334] Wk 0834 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Wed, 17 Jan 1996 6:16:32 PST

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IGS Electronic Report    Wed Jan 17  6:16:32 PST 1996      Message Number 2334
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0834 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0834   (Dec 31, 1995 - Jan 06, 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 (IGS08347.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:

 IGS08340-6.SP3  IGS GPS ephemeris files for days 0-6, week 0834 in SP3 format.
 IGS08347.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08347.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:
   PRN12, PRN15 and PRN28. 

4. New clock offsets and drifts were estimated for centres showing reference
   clock resets.  Note that only the first clock offset and drift are output
   to the summary file.  However, the clock combination and the listed RMS
   include all the clock segments.  In summary, the following clock
   shifts/resets were noticed and accounted for:

              Day (Date)  | Centres  | Shifts/Resets
             -------------+----------+------------------
              2 (Jan 02)  | EMR,GFZ  | ~540 ns (~04:15)

5. Some clock solutions were excluded from the combination due to large clock
   shifts or outliers that were biasing the combined clock solution, but were
   kept for the RMS computation. The following table lists the exclusions:

            Day (Date)  |   PRN    | Centres | Shifts/Outliers
           -------------+----------+---------+------------------
            0 (Dec 31)  | 19,27,29 |   ESA   | up to ~60 ns

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  
                    -------------+------+--------
                     1 (Jan 01)  | ALL  | SIO (a)
                     3 (Jan 03)  | ALL  | SIO (b)
                     4 (Jan 04)  | ALL  | SIO (b)
                     5 (Jan 05)  | ALL  | SIO (a)
                     6 (Jan 06)  | ALL  | SIO (a)

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

7. 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.

8. NGS solutions were not used in the combination since they were not available 
   on CDDIS at the time of this combination. These will be used in the final 
   combination.  

   On days 0-6, broadcast clock corrections were still used to align each 
   centre satellite clock corrections to GPS time despite of the missing NGS
   solutions (which usually are used for the alignment to the broadcast GPS
   time).

9. Starting with GPS week 0834, long arc RMS for non-eclipsing satellites (NE)
   are now output below the total long arc RMS (T) (See Table 3).

10.Starting with GPS week 0834, the IGS combined orbits/clocks and all centres 
   providing both orbit and clock solutions are now further evaluated by an 
   independent point positioning (navigation) program. See COMBINATION
   STRATEGY AND ORBIT COMBINATION AND EVALUATION STATISTICS sections for more
   details. Tables 4 and 5 show the evaluation results.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08347.SUM).

Table 1: Week 0834 summary.                       (Dec 31, 1995 - Jan 06, 1996)

Table 1.0834.a   GPS week: 0834   MJD: 50082.0-50088.0

         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  62 | .01  .02  .01   .03  -.11  -.17   .0  .07  .07 |    1.8    2.9    1.8
        | .01  .01  .00   .15   .10   .10   .1           |    6.0    9.8
emr  26 | .00 -.02 -.02   .18  -.02   .22  -.1  .10  .10 |  233.9    7.0     .9
        | .01  .01  .01   .12   .07   .16   .1           |  274.6   22.9
esa  43 | .00 -.03 -.02   .35   .15   .20   .0  .15  .13 |    9.7  -11.5   13.4
        | .01  .01  .00   .31   .28   .26   .1           |   18.6   17.1
gfz  41 |-.03 -.03  .00   .11  -.06  -.23  -.4  .13  .11 |  233.8   10.1    6.9
        | .01  .00  .01   .09   .10   .27   .1           |  274.8   32.9
jpl  37 | .01  .02  .00  -.39  -.01   .15   .2  .09  .09 | -343.4   10.9     .8
        | .01  .01  .00   .15   .08   .17   .1           |  807.6   14.8
sio  102|-.01  .10  .02  -.53   .59 22.84   .435.2433.40 |     .0     .0     .0
        | .00  .19  .01   .96   .46 57.93   .1           |     .0     .0

Table 1.0834.b   GPS week : 0834   MJD: 50082.0-50088.0

         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   3   3   4   3   4 |
   2E |   4   7   4   5   6   7   5 |
   4  |   4   4   4   4   5   4   4 |
   5E |   5   7   5   6   6   7   5 |
   6  |   5   7   3   4   3   4   4 |
   7  |   3   4   5   4   4   4   4 |
   9  |   4   5   3   3   5   4   4 |
  12  |   3   5   3   3   5   4   4 | Low tracking (all week).
  14  |   3   4   4   4   3   3   3 |
  15  |   4   7   4   6   5   5   4 |
  16  |   3   4   3   3   3   3   4 |
  17  |   4   5   4   4   5   4   4 |
  18  |   3   3   3   2   4   2   3 |
  19  |   3   4   3   4   4   4   4 |
  20E |   8  10   6   7   7   6   6 |
  21  |   3   4   3   4   5   5   4 |
  22E |   6   6   7   5   4   5   5 |
  23  |   6   5   5   5   6   3   5 |
  24  |   5   5   4   5   5   5   6 |
  25  |   3   4   2   3   4   3   3 |
  26  |   4   5   4   4   7   4   3 |
  27  |   4   4   3   3   4   4   4 |
  28  |   3   4   3   4   4   4   4 |
  29  |   2   3   3   3   3   2   3 |
  31  |   3   6   3   4   4   3   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 2.0834.0   GPS week: 0834   Day: 0   MJD: 50082.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  61 | .01  .01  .01   .02  -.20  -.25   .0  .08  .07 |    9.2   -8.4    2.0
emr  24 | .00 -.04 -.01   .06  -.02   .52  -.3  .12  .12 |  516.9   18.2     .8
esa  44 |-.01 -.04 -.03   .51  -.24   .59   .0  .16  .14 |   12.5   -6.1    6.0
gfz  43 |-.02 -.03 -.01   .20   .05   .21  -.4  .12  .11 |  521.0   14.3    6.9
jpl  37 | .01  .02 -.01  -.27  -.11   .22   .1  .08  .08 |  519.6   17.7     .8
sio  103|-.01  .03  .02  -.10   .43  -.68   .4  .09  .10 |     .0     .0     .0

Table 2.0834.1   GPS week: 0834   Day: 1   MJD: 50083.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .01  .03  .01   .05   .00  -.32   .0  .09  .08 |   10.1   -7.0    1.9
emr  27 | .00 -.02 -.02   .17   .08   .29   .0  .11  .11 |  535.1   -2.7     .7
esa  42 | .00 -.02 -.02   .50  -.04   .14   .0  .16  .14 |   -2.6  -25.9   14.4
gfz  44 |-.02 -.03  .00   .03  -.12  -.05  -.3  .13  .11 |  535.1    4.5    7.9
jpl  37 | .02  .02  .00  -.50   .04   .17   .4  .11  .11 |-1481.8  -16.3     .7
sio  102|-.01  .54  .01  -.78  1.62154.20   .493.2388.36 |     .0     .0     .0

Table 2.0834.2   GPS week: 0834   Day: 2   MJD: 50084.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .01  .02  .01   .20  -.25  -.16  -.1  .07  .07 |   -6.0    1.3    1.8
emr  26 | .00 -.03 -.03   .43  -.02   .22  -.1  .11  .11 |  530.0  -39.3    1.3
esa  43 | .01 -.03 -.02  -.16   .21   .07  -.2  .15  .13 |   47.0    8.7   13.9
gfz  43 |-.03 -.03 -.01   .13  -.19  -.33  -.5  .12  .11 |  526.1  -58.5    5.8
jpl  37 | .01  .02 -.01  -.37  -.09   .04   .1  .07  .07 |-1507.3    3.9    1.1
sio  106|-.01  .02  .02  -.26   .38   .17   .2  .09  .08 |     .0     .0     .0

Table 2.0834.3   GPS week: 0834   Day: 3   MJD: 50085.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .01  .02  .02   .00  -.13  -.20  -.1  .07  .06 |     .3   14.2    1.7
emr  26 |-.01 -.02 -.02   .12  -.13   .15  -.2  .08  .08 |     .5   11.8     .7
esa  43 | .02 -.03 -.02   .25   .62   .19  -.1  .13  .12 |     .4  -26.1   15.1
gfz  43 |-.04 -.02  .00   .06  -.11  -.09  -.2  .13  .12 |     .5   21.9    6.1
jpl  37 | .01  .02  .00  -.33   .10   .12   .2  .08  .08 |    3.1   11.3     .6
sio  103|-.01  .04  .03 -1.62   .52   .73   .4  .11  .11 |     .0     .0     .0

Table 2.0834.4   GPS week: 0834   Day: 4   MJD: 50086.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 | .01  .03  .01   .12   .00  -.18  -.1  .08  .08 |    2.1    -.4    1.6
emr  25 | .00 -.01 -.01   .12  -.06   .00   .0  .10  .10 |    7.7   13.9     .9
esa  43 | .00 -.01 -.02   .11   .19  -.14   .1  .14  .14 |   10.1   -2.3   14.1
gfz  39 |-.03 -.03  .01   .27  -.12  -.30  -.4  .12  .11 |    7.3   26.1    5.1
jpl  37 | .00  .03  .00  -.56  -.05   .47   .1  .09  .09 |   10.3   13.4     .8
sio  104|-.01  .03  .03 -1.64   .36  1.04   .2  .10  .10 |     .0     .0     .0

Table 2.0834.5   GPS week: 0834   Day: 5   MJD: 50087.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  61 | .00  .02  .01   .06  -.05  -.02   .1  .07  .06 |     .5    3.0    1.9
emr  28 | .01 -.02 -.01   .17   .04   .20  -.3  .08  .08 |   19.9   14.0     .8
esa  43 | .01 -.03 -.03   .44   .00   .06   .0  .16  .14 |   11.8  -34.2   14.2
gfz  38 |-.03 -.03  .01   .08  -.05  -.51  -.5  .13  .12 |   20.9   16.5    8.2
jpl  37 | .00  .03  .00  -.53   .03   .07   .4  .08  .08 |   22.4   13.6     .7
sio  98 |-.02  .03  .02  -.48   .38  1.95   .3  .13  .11 |     .0     .0     .0

Table 2.0834.6   GPS week: 0834   Day: 6   MJD: 50088.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  58 | .00  .02  .02  -.28  -.17  -.09   .1  .06  .05 |   -3.5   17.4    1.6
emr  27 | .00 -.03 -.02   .20  -.04   .19  -.1  .09  .08 |   27.3   33.0    1.1
esa  44 | .00 -.04 -.02   .80   .33   .49   .2  .14  .13 |  -11.2    5.5   13.7
gfz  40 |-.05 -.03  .00   .00   .10  -.51  -.5  .13  .12 |   25.5   46.2    7.9
jpl  37 | .01  .04  .00  -.16   .03  -.05   .2  .08  .08 |   29.9   32.6     .9
sio  97 |-.01  .04  .01  1.14   .45  2.46   .5  .13  .11 |     .0     .0     .0

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

         "E" stands for  eclipsing satellites.
         "T" stands for Total long arc orbit RMS for all satellites.
         "NE" stands for long arc orbit RMS for Non-Eclipsing satellites only.

         Units: cm.

Table 3.0834.0   GPS week: 0834   Day: 0   MJD: 50082.0

               Weighted Average                Orbit Dynamics (7 days)

 PRN  | cod emr esa gfz jpl sio  IGS |  cod emr esa gfz jpl sio  IGS
------|------------------------------|------------------------------
   1  |   8   9   8  10   6  10    3 |    6   8  13  12   8  10    9
   2E |   8  13  12  11   6  11    4 |   16  21  22  19  14  13   16
   4  |   8  13   8  12   6   7    4 |    9  16  15  14   7   9    8
   5E |   6  16  15  14  12  10    5 |   11  20  18  21  14  10   14
   6  |   5  11  29   8   6   8    5 |    3  14  13  13  10  12    9
   7  |   6   7  13   6   5   7    3 |    6  11  19  11   7  10    9
   9  |   5  10  18   7   7   7    4 |    6  11  14  10   8   8    6
  12  |   4 ---   8 --- ---   4    3 |    9 ---  11 --- ---  15    8
  14  |   5  10  15   6   5   4    3 |    6  11  13  15   8   6    9
  15  |   8  12  13  15   9   8    4 |    8  20  14  19  10  12    9
  16  |   7   9  11  11   4   7    3 |    8  10  10   9   9   6    8
  17  |   6  12  14  12   7   9    4 |    9  15  16  16   6   8    7
  18  |   6   4   7  12   4   7    3 |    6  10  10  16   9  12    9
  19  |   7   6  12   7   7   5    3 |    7  10  12  10   8  10    6
  20E |  13  17  28  30  12  13    8 |   17  30  37  37  16  23   20
  21  |   5  13   8   8   6   6    3 |    8  12  11  18   8  11    9
  22E |  12  10  15  14  15  16    6 |   21  20  23  18  15  11   16
  23  |   7  25  24  12   6   9    6 |   35  31  31  31  27  29   28
  24  |   8  13  26  11   6   7    5 |    7  11  14  11   6   8    7
  25  |   5  11  14   7   6   8    3 |    6   9  18  11   6   7    6
  26  |  11   7   8  11   6   7    4 |    9   7   9  13   8  15    7
  27  |   6   6  12  13   6   9    4 |    6   9   9  10   7   9    6
  28  |   5   7  10  11   7   8    3 |    7  11  13  12  11   6    8
  29  |   6   3  10   6   4   6    2 |    7   7  12  12   9  17    8
  31  |   5   9  10  10   5   9    3 |    5  15  12  12  11   8    8
------|------------------------------|------------------------------
 RMS  |   7  11  15  12   7   8      |T  11  15  16  16  11  12   11
 WRMS |   7  11  14  10   7   9      |NE 10  13  14  14  10  11    9

Table 3.0834.1   GPS week: 0834   Day: 1   MJD: 50083.0

               Weighted Average                Orbit Dynamics (7 days)

 PRN  | cod emr esa gfz jpl sio  IGS |  cod emr esa gfz jpl sio  IGS
------|------------------------------|------------------------------
   1  |   7   8  15  10   8 >>>    5 |    4   8  14   9   9  11    5
   2E |  10   9  33  12   9 >>>    7 |   14  19  16  20  13  10   14
   4  |   5   8  15   9   7 >>>    4 |   10  10  16  10   8   8    8
   5E |   7  14  15  16  16 >>>    7 |   10  18  19  21  12   7   11
   6  |   4  11  13  17  23 >>>    7 |    5  12  15  17  23  10    6
   7  |   7   4  20   7   7 >>>    4 |    7  14  17  12   6   9    8
   9  |   6  11  18   8   8 >>>    5 |    5   9  13  12   5  10    4
  12  |   3 ---  13 ---   7 >>>    5 |    6 ---   9 ---   8  18    5
  14  |   6  12  16   7   6 >>>    4 |    8  11  12  12   8  11    7
  15  |  11  16  15  16  10 >>>    7 |    5  18  16  19   8   9    9
  16  |   5  12   5  13   6 >>>    4 |    6  10  10  10   8   8    6
  17  |   8  10  15  11  13 >>>    5 |    9  15  21  14  12   6    8
  18  |   5   6   9   9   3 >>>    3 |    6   9   9  12   9   8    5
  19  |   7   8   8  11   6 >>>    4 |    6  11  10  11   9   8    5
  20E |  15  16  20  29  19 >>>   10 |   12  25  28  30  16  20   15
  21  |   7   9  13   8   6 >>>    4 |    6  12  11  12   7   5    6
  22E |  11  13  15  10  16 >>>    6 |   14  19  25  18   7  10   14
  23  |   7  17  11   5  11 >>>    5 |   19  24  16  17  22  27   18
  24  |   8  12  20  10   9 >>>    5 |    7  10  15  10   9  12    6
  25  |   8   7  11   9   5 >>>    4 |    5   9  14  12   7  10    5
  26  |  15   7  10  12   7 >>>    5 |    8   9   8   8   9  14    5
  27  |   4   5  16   8   5 >>>    4 |    5   8  11   9   6   6    4
  28  |   5   6  11   9   8 >>>    4 |    8  11  14  13   8   7    8
  29  |   5   4  13   4   3 >>>    3 |    4   5   8  10   8  12    3
  31  |   9  17   7  15  10 >>>    6 |    4  20  17  15   7  11    8
------|------------------------------|------------------------------
 RMS  |   8  11  15  12  10 >>>      |T   8  14  15  14  10  11    8
 WRMS |   8  11  13  10  10 >>>      |NE  7  12  13  12  10  11    7

Table 3.0834.2   GPS week: 0834   Day: 2   MJD: 50084.0

               Weighted Average                Orbit Dynamics (7 days)

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

Table 3.0834.3   GPS week: 0834   Day: 3   MJD: 50085.0

               Weighted Average                Orbit Dynamics (7 days)

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

Table 3.0834.4   GPS week: 0834   Day: 4   MJD: 50086.0

               Weighted Average                Orbit Dynamics (7 days)

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

Table 3.0834.5   GPS week: 0834   Day: 5   MJD: 50087.0

               Weighted Average                Orbit Dynamics (7 days)

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

Table 3.0834.6   GPS week: 0834   Day: 6   MJD: 50088.0

               Weighted Average                Orbit Dynamics (7 days)

 PRN  | cod emr esa gfz jpl sio  IGS |  cod emr esa gfz jpl sio  IGS
------|------------------------------|------------------------------
   1  |   5   6  13  12   5   9    4 |    5   8  16   8   8  13    6
   2E |   9  11  18  12   9  15    5 |   23  28  26  24  21  17   23
   4  |   6   8  15  11   6   8    4 |    5   9  16  11   5  12    7
   5E |   7   8  11  16   9  14    5 |   11  16  20  22  11  11   12
   6  |   7   9   8   7   7   9    4 |    5  12  15  14   9  17   10
   7  |   4   7  21   8   7  12    4 |    5  10  20  11   6  16    7
   9  |   4  11   9   9  10   9    4 |    4  11  14   9   6  15    5
  12  |   3   6  13 ---   6 ---    4 |    6  10  15 ---   7 ---    7
  14  |   6   6  12   9   4   8    3 |    5  11  14  13   9  12    9
  15  |   6   9  13  15   7  15    4 |    5  16  20  19   5  25    9
  16  |   4   7  10  14   6  12    4 |    7  10  16  10   9  15    8
  17  |   6   8  15  10   9  11    4 |    7  14  22  14   9  11   11
  18  |   5   6  13   6   5   8    3 |    7   7  15   9  10  17    7
  19  |   6   7  15  11   9  13    4 |    5   9  17   9  10  15    6
  20E |   8  11  14  22   8  21    6 |   22  29  29  32  20  31   24
  21  |   5   7  12  15   6   7    4 |    6  11  17  12   7  11    9
  22E |   8   8  16  14  12  20    5 |   13  17  29  17  12  14   14
  23  |   6  15  17  10   9  10    5 |   26  38  28  32  28  38   30
  24  |   5   8  22  20  11  13    6 |    5  11  24  16   7  15    7
  25  |   3   5   9  10   7   9    3 |    5   7  21  14   7  10    6
  26  |   5   5   9  12   7   9    3 |    7  10  14   9   6  17    8
  27  |   4   7  14   9   8   6    4 |    4  10  17   9   7  11    5
  28  |   4   5   8  13   9  12    4 |    7  11  15  13   7  13    8
  29  |   4   5  15   5   4  11    3 |    5   8  18   8   8  23    7
  31  |   5   7   8  15   7  17    4 |    5  12  16  15   7  15    8
------|------------------------------|------------------------------
 RMS  |   6   8  14  12   8  12      |T  10  15  19  16  11  17   11
 WRMS |   5   8  13  11   8  10      |NE  7  13  17  13   9  17    9

Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the initial coordinates for the Latitude,
         Longitude and Height components.  See Table 5 for the daily summary.

         CLK  - Satellite clocks used.
         EPO  - Mean number of satellite clock epochs available in the daily
                solutions.
	 U    - Station Used in centre's solution (at least one day).
         Units: centimetres.

Table 4.0834   GPS week: 0834   MJD: 50082.0-50088.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2131 |U  57   40  101 |U  55   35  112 |   55   37   97 |
emr | emr 2349 |   49   37   91 |   39   27   81 |U  52   27   86 |
esa | esa 2092 |  412  236  820 |U 403  238  712 |  414  218  478 |
gfz | gfz 1152 |  308  153  543 |U 247  115  389 |  207  101  261 |
igs | igs 2398 |   42   32   81 |   37   24   76 |   44   24   74 |
jpl | jpl 2365 |U  42   31   77 |U  35   22   67 |   47   25   70 |

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 5.0834.0   GPS week: 0834   Day: 0   MJD: 50082.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2143 |   68   40  104 |   56   41  129 |   46   42  101 |
emr | emr 2285 |   54   35   90 |   39   34   84 |   44   28   83 |
esa | esa 1981 |  346  131  578 |   93  119  229 |   60   43  128 |
gfz | gfz 1152 |  286  140  591 |  301  121  422 |  211   89  247 |
igs | igs 2388 |   49   32   85 |   37   34   80 |   38   25   80 |
jpl | jpl 2287 |   43   30   70 |   35   25   71 |   37   23   64 |

Table 5.0834.1   GPS week: 0834   Day: 1   MJD: 50083.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2026 |   55   40   98 |   49   34   85 |   56   33   99 |
emr | emr 2295 |   51   35   87 |   32   28   75 |   53   25   99 |
esa | esa 2111 |  370  202  756 |  374  254  714 |  426  235  471 |
gfz | gfz 1152 |  283  124  535 |  240  113  426 |  215  111  256 |
igs | igs 2399 |   46   31   78 |   28   24   59 |   48   21   77 |
jpl | jpl 2361 |   47   31   73 |   27   22   57 |   48   19   72 |

Table 5.0834.2   GPS week: 0834   Day: 2   MJD: 50084.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2238 |   55   41   95 |   52   34  104 |   43   37   91 |
emr | emr 2375 |   45   34   84 |   42   27   96 |   42   23   68 |
esa | esa 2088 |  342  227  732 |  428  246  746 |  409  229  484 |
gfz | gfz 1152 |  236  134  463 |  259  112  408 |  189   83  225 |
igs | igs 2400 |   39   31   80 |   38   22   84 |   32   22   55 |
jpl | jpl 2383 |   41   28   78 |   36   21   75 |   34   21   50 |

Table 5.0834.3   GPS week: 0834   Day: 3   MJD: 50085.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2169 |    0    0    0 |   50   37   82 |   46   33   78 |
emr | emr 2377 |    0    0    0 |   44   27   72 |   44   26   69 |
esa | esa 2104 |    0    0    0 |  490  267  842 |  463  235  509 |
gfz | gfz 1152 |    0    0    0 |  275   96  425 |  208   88  227 |
igs | igs 2400 |    0    0    0 |   37   23   59 |   36   23   55 |
jpl | jpl 2384 |    0    0    0 |   35   20   51 |   36   25   51 |

Table 5.0834.4   GPS week: 0834   Day: 4   MJD: 50086.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2227 |   46   37   94 |   54   33  105 |   79   37  117 |
emr | emr 2374 |   45   33   84 |   41   20   70 |   83   33  126 |
esa | esa 2114 |  457  271  943 |  437  240  743 |  457  238  532 |
gfz | gfz 1152 |  216  122  387 |  185   99  335 |  178   96  267 |
igs | igs 2400 |   36   30   78 |   40   20   68 |   76   30  117 |
jpl | jpl 2384 |   40   30   74 |   39   20   50 |   81   31  118 |

Table 5.0834.5   GPS week: 0834   Day: 5   MJD: 50087.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 1923 |   65   45  120 |   70   34  128 |   52   38  105 |
emr | emr 2380 |   52   42  100 |   36   26   72 |   36   27   70 |
esa | esa 2141 |  475  265  902 |  424  259  766 |  418  211  511 |
gfz | gfz 1152 |  252  183  451 |  290  160  403 |  252  118  326 |
igs | igs 2400 |   43   35   86 |   37   22   68 |   32   24   60 |
jpl | jpl 2383 |   43   33   88 |   35   23   61 |   34   28   56 |

Table 5.0834.6   GPS week: 0834   Day: 6   MJD: 50088.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2192 |   50   38   93 |   51   28  138 |   53   40   86 |
emr | emr 2360 |   48   41   98 |   40   22   96 |   44   25   69 |
esa | esa 2108 |  461  285  941 |  440  250  762 |  498  257  570 |
gfz | gfz 1152 |  488  199  752 |  131   84  277 |  186  117  267 |
igs | igs 2397 |   37   33   77 |   39   22  104 |   30   22   47 |
jpl | jpl 2376 |   35   31   75 |   36   19   91 |   38   25   53 |

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