Subject: [IGSREPORT-2771] Wk 0858 IGS Rapid Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 2 Jul 1996 11:22:42 PDT

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IGS Electronic Report    Tue Jul  2 11:22:42 PDT 1996      Message Number 2771
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0858 IGS Rapid Orbits

Rapid Service IGS Orbit Combination - Week 0858   (Jun 16, 1996 - Jun 22, 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 (IGS08587.SUM).

SOFTWARE:

  The weighted average software used was developed by T. Springer and
G. Beutler during 1993. The GPS long arc orbit analysis software used here for
individual centre ephemeris evaluation was developed by Beutler et al. at the
Astronomical Institute of the University of Bern (AIUB). For more details on
the orbit combination and complete references for both software see:

   Beutler, Kouba, Springer, 1993, Combining orbits of the IGS processing
   centres, in IGS Analysis Centre Workshop, October 12-14, Ottawa, pp 19-55.

PRODUCTS GENERATED:

  The resulting average ephemeris and clocks are output to daily files in SP3
format. The satellite accuracy codes displayed in the header are based on the
weighted RMS for each satellite. Note that each file contains all the
satellites that appear in any of the centre ephemeris files. If a satellite or
centre was excluded from combination, a note in the REMARKS section of this
report will identify the exclusion and the reason.

  The resulting x and y earth rotation parameters (ERP) associated with the IGS
ephemeris files and their rates (xrt, yrt) are computed using a weighted average
of all available centres (weights are those from the orbit combination). 
Pole rate combination uses only centres providing estimated pole rates.
These values are supplemented with the current IERS Bulletin A UT1-UTC values. 

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

 IGS08580-6.SP3  IGS GPS ephemeris files for days 0-6, week 0858 in SP3 format.
 IGS08587.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08587.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. Higher clock RMS for NGS on day 1 (Jun 17) was caused by clock jumps on 
   PRN09 at ~16:00.  PRN17 was set unusable starting at 12:18 until 16:27
   (ref. NANU 108-96169). 

6. 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
             -------------+----------+------------------
              5 (Jun 21)  |   EMR    | ~ +4917 ns (~22:00)

7. 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 20)  | 22   | EMR    

8. 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 19) | 00:00:00 |  19   |   ALL    | Modeling problems (a)
          4 (Jun 20) | 00:00:00 |  22   |   ALL    | Modeling problems
          5 (Jun 21) | 00:00:00 |  23   |   ALL    | Modeling problems
          6 (Jun 22) | 00:00:00 |  14   |   ALL    | Modeling problems (b)

   (a) Due to unrealistic long arc RMS, PRN19 was excluded from the long arc 
       evaluation on day 2 for ACs that submitted solutions for this satellite
       (COD,IGP,IGS,JPL); 

   (b) Due to unrealistic long arc RMS, PRN14 was excluded from the long arc 
       evaluation on day 5 for ACs that submitted solutions for this satellite
       (COD,IGP,IGS,JPL); 

9. 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.

10.Starting with GPS week 0857, estimated x and y pole rates (xrt, yrt) are also
   combined along with x and y ERP values.  They are computed using a weighted 
   average (similar to mean x and y) of all centres providing estimated rates.  
   Weights are those from the orbit combination.

11.Starting with GPS week 0857, the median of each centre's satellite RMS
   ("MEDI", "MD") are now added to the usual statistics of Table 2 in order to 
   help with the interpretation of centre orbit rms statistics.

12.User are reminded that this week's Rapid Combination is still in the ITRF93 
   reference frame.  ITRF94 reference frame will be used starting on week 860.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08587.SUM).

Table 1: Week 0858 summary.                       (Jun 16, 1996 - Jun 22, 1996)

Table 1.0858.a   GPS week: 0858   MJD: 50250.0-50256.0

         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  69 | .00  .01  .01  -.48  -.07  -.30   .0  .07  .05 |   -2.1   -8.1    1.9
        | .00  .00  .00   .06   .08   .21   .1           |    5.9    8.1
emr  29 | .00 -.01 -.01   .34   .58   .60   .2  .14  .13 |  100.0   12.5    1.0
        | .01  .01  .01   .14   .25   .34   .2           | 2682.9   26.2
esa  50 | .01  .00  .00  -.11  -.05  -.01   .2  .12  .10 |   -7.6   -3.7    2.8
        | .01  .01  .01   .28   .11   .23   .1           |   24.1   30.2
gfz  47 | .01 -.01  .00   .09   .09  -.10  -.2  .07  .07 |  100.0   23.3     .8
        | .01  .01  .00   .16   .05   .11   .1           |  177.3   13.5
igp  n/a| .00  .00  .00   .13  -.04  -.04   .0  .07  .06 |    1.7   -4.4    1.3
        | .01  .01  .00   .15   .09   .11   .1           |    1.3    2.3
jpl  37 | .00  .01  .01   .08   .07   .22   .0  .06  .06 |  100.0    3.4     .9
        | .00  .01  .00   .09   .04   .08   .1           | 1689.1   31.2
ngs  45 | .00 -.05 -.02  -.30  -.31  -.37  -.1  .15  .15 |   -1.2   -1.4  297.9
        | .01  .01  .01   .44   .26   .28   .2           |    5.1   10.4
sio  109|-.01  .01 -.01   .36  -.29   .05  -.1  .07  .07 |     .0     .0     .0
        | .00  .00  .01   .07   .06   .25   .0           |     .0     .0

Table 1.0858.b   GPS week : 0858   MJD: 50250.0-50256.0

         Satellite position sigmas for the combined orbits
         (coded in the IGS SP3 orbit files).
         "E" flags eclipsing satellites.
         Units: cm.

              Day of GPS week
 PRN  |   0   1   2   3   4   5   6 |  Remarks
------|-----------------------------|------------------------------------------
   1  |   3   3   3   3   3   3   3 |
   2E |   4   3   4   5   4   5   3 |
   3  |   4   3   3   3   3   4   3 |
   4E |   3   3   3   3   3   3   3 |
   5E |   4   4   4   4   5   5   4 |
   6  |   3   2   3   3   3   3   3 |
   7  |   3   4   3   3   3   4   3 |
   9  |   3   3   3   3   4   3   4 |
  14  |   3   3   3   3   3  20   4 | Modeling problems on day 5
  15E |   3   3   4   4   3   4   3 |
  16  |   3   4   3   3   3   3   3 |
  17E |   3   4   4   4   3   3   3 |
  18  |   3   3   3   3   3   3   2 |
  19  |   3   3  10   3   3   3   4 | Modeling problems on day 2
  21  |   3   3   4   3   3   3   3 |
  22E |   5   6   5   5   6   6   5 |
  23  |   5   5   5   5   4   4   4 |
  24E |   3   3   3   3   3   4   3 |
  25  |   3   3   3   3   3   4   3 |
  26  |   3   3   4   3   3   3   3 |
  27  |   3   3   4   3   3   3   3 |
  28  |   2   3   3   3   3   3   3 |
  29  |   3   3   3   3   3   4   3 |
  31  |   3   3   3   3   3   3   3 |

Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
         Units: meters, mas, ppb, nano-sec, nano-sec/day.

Table 2.0858.0   GPS week: 0858   Day: 0   MJD: 50250.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  71 | .00  .00  .01  -.36  -.06  -.32  -.1  .06  .05 |    4.7  -18.0    1.7
emr  30 | .00 -.02 -.01   .46   .54   .83   .4  .11  .10 |  351.8   15.0     .8
esa  52 | .00  .00 -.01   .00  -.25   .10   .1  .11  .10 |    3.4    7.2    3.0
gfz  47 | .01 -.02  .01  -.06   .16  -.19  -.1  .08  .07 |  353.6   14.7     .8
igp  n/a| .00 -.01  .00   .07   .08   .00   .0  .05  .04 |    3.1   -5.4     .9
jpl  37 | .00  .02  .00   .01   .07   .06   .0  .06  .06 |  352.6   15.6     .8
ngs  48 | .00 -.05 -.02  -.39  -.08  -.19   .0  .14  .14 |    6.2  -18.4   77.0
sio  111|-.01  .01 -.01   .36  -.26   .04  -.1  .06  .06 |     .0     .0     .0

Table 2.0858.1   GPS week: 0858   Day: 1   MJD: 50251.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  71 | .00  .01  .01  -.48  -.03  -.48   .0  .06  .04 |   -7.7    -.3    1.7
emr  30 |-.01 -.02 -.01   .35   .58   .71   .2  .11  .10 |  379.5   24.6     .8
esa  50 | .01  .01 -.02  -.13   .05  -.05   .2  .13  .11 |  -18.6   11.9    2.8
gfz  48 | .01 -.01  .00   .01   .03   .03  -.2  .08  .07 |  381.3   23.8     .7
igp  n/a| .00 -.01  .00   .29  -.01   .11   .1  .06  .06 |    -.3    -.2     .9
jpl  37 | .00  .01  .01   .04   .08   .20   .1  .06  .06 |  380.6   24.6     .8
ngs  46 | .00 -.06 -.02   .16  -.43  -.53  -.1  .17  .17 |   -4.8   10.8  764.4
sio  110| .00  .02  .00   .42  -.41   .22  -.1  .06  .06 |     .0     .0     .0

Table 2.0858.2   GPS week: 0858   Day: 2   MJD: 50252.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  71 | .00  .01  .01  -.50  -.01  -.40   .2  .07  .06 |   -9.7    2.7    1.7
emr  30 |-.01 -.02 -.01   .36   .74   .42   .1  .16  .17 |  404.8   42.5     .7
esa  51 | .01  .00  .01   .31  -.10   .41   .1  .12  .10 |  -41.2   19.8    1.8
gfz  50 | .00 -.01  .00  -.11   .09  -.10  -.3  .07  .07 |  406.8   41.5     .6
igp  n/a| .00  .00  .00   .20  -.14  -.11   .0  .07  .06 |    2.2   -3.2    1.9
jpl  37 | .00  .00  .01   .01   .05   .23  -.1  .07  .07 |  406.0   42.3     .7
ngs  48 | .00 -.04 -.03   .33  -.56  -.49   .0  .15  .15 |   -5.7    5.5   80.0
sio  109|-.01  .02 -.02   .21  -.25   .21   .0  .07  .07 |     .0     .0     .0

Table 2.0858.3   GPS week: 0858   Day: 3   MJD: 50253.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  70 | .00  .01  .01  -.48   .00  -.48   .0  .05  .05 |   -7.1   -3.5    1.6
emr  28 | .00  .00 -.03   .31   .74   .75   .3  .09  .09 |  447.6   20.3     .8
esa  52 | .00  .00 -.01  -.08  -.07  -.11   .2  .13  .10 |    8.8    4.2    2.2
gfz  47 | .01 -.02  .00   .10   .08  -.02  -.1  .07  .07 |  448.9   20.7     .6
igp  n/a|-.01 -.01  .00   .18  -.04  -.16   .0  .06  .06 |     .9   -4.3     .9
jpl  37 | .01  .01  .01   .19   .01   .28  -.1  .06  .06 | -387.3  -11.1     .8
ngs  45 | .00 -.06 -.01  -.64  -.38  -.65  -.3  .15  .15 |   -4.7    6.0   77.9
sio  109|-.01  .01 -.01   .43  -.34   .26   .0  .06  .06 |     .0     .0     .0

Table 2.0858.4   GPS week: 0858   Day: 4   MJD: 50254.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  68 | .00  .01  .01  -.53  -.22  -.43   .2  .07  .06 |    3.0   -8.8    2.1
emr  26 |-.01 -.01 -.01   .40   .78  1.10   .0  .22  .20 |-5065.9  -20.1    1.3
esa  50 | .01  .00  .01  -.03  -.02  -.25   .1  .12  .10 |   30.9  -67.0    4.3
gfz  45 | .01 -.01  .00   .11   .04  -.08  -.2  .07  .07 |  482.4   28.9    1.2
igp  n/a| .00  .00  .00   .19  -.08   .10   .0  .05  .04 |    3.0   -7.6    1.3
jpl  37 | .00  .02  .01   .17   .06   .27   .0  .06  .06 | -383.2   -5.6    1.2
ngs  42 | .00 -.04 -.03  -.60  -.06  -.57  -.4  .12  .12 |     .1   -6.9   77.1
sio  106|-.01  .01 -.01   .36  -.26   .02   .0  .07  .07 |     .0     .0     .0

Table 2.0858.5   GPS week: 0858   Day: 5   MJD: 50255.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  67 | .00  .02  .01  -.47  -.11  -.05  -.1  .11  .06 |    1.9  -11.1    1.9
emr  27 |-.01  .00 -.03   .04   .66   .09   .2  .14  .13 |-5075.9  -27.1    1.4
esa  47 | .02 -.01  .00  -.21   .01   .01   .2  .13  .11 |  -10.1  -16.6    2.8
gfz  46 | .00 -.02  .00   .33   .11  -.30  -.1  .07  .07 |     .0     .0     .0
igp  n/a| .00  .00  .00  -.17  -.16  -.12  -.1  .11  .06 |    2.1   -4.4    1.7
jpl  37 |-.01  .01  .01   .15   .14   .18  -.1  .07  .07 | -444.8  -54.5     .9
ngs  44 |-.01 -.04 -.01  -.86  -.65  -.34  -.1  .16  .16 |    5.3   -9.2   79.7
sio  108| .00  .01 -.01   .37  -.24   .11  -.1  .08  .08 |     .0     .0     .0

Table 2.0858.6   GPS week: 0858   Day: 6   MJD: 50256.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  66 | .00  .01  .01  -.53  -.09   .03   .0  .08  .06 |     .1  -17.6    2.3
emr  29 | .00  .00  .00   .46   .05   .32   .1  .11  .10 |  545.8   32.2    1.2
esa  49 | .00  .00  .00  -.63   .06  -.22   .1  .11  .09 |  -26.3   14.4    2.3
gfz  44 | .00 -.02 -.01   .25   .14  -.06  -.3  .06  .06 |  546.9   33.3    1.1
igp  n/a| .00  .00 -.01   .15   .03  -.09  -.1  .05  .05 |    1.0   -6.0    1.3
jpl  37 | .00  .02  .01  -.02   .08   .30   .2  .06  .06 | 4333.5   12.2    1.2
ngs  43 | .01 -.05 -.02  -.14  -.02   .15   .0  .14  .14 |   -4.8    2.4   78.4
sio  107|-.01  .01 -.01   .36  -.26  -.48   .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 for all satellites.
         "NE" stands for long arc orbit RMS for Non-Eclipsing satellites only.
         "MEDI","MD" stands for median of the centre's satellite RMS.

         Units: cm.

Table 3.0858.0   GPS week: 0858   Day: 0   MJD: 50250.0

               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  12   7   5   4   4   7   6    3 |    7  13  11  10   9   8   7   6    7
   2E |   7  12  12  10  10   7  15   7    4 |   19  24  23  24  21  22  27  23   21
   3  |   9   9  12   5   4   8  20   6    4 |    7   9   9  10   7   8  16   4    6
   4E |   6   7  10   8   4   7  10   6    3 |   13  18  16  18  15  14  17  12   14
   5E |   5  11  19   7   6   5  16   6    4 |   22  23  18  22  24  17  27  19   19
   6  |   5   9   7   6   4   4  13   5    3 |    4   9  10  10   8   5  12   4    6
   7  |   3  10   8   5   4   4  17   6    3 |    6  11   9  11   7   6  10   3    6
   9  |   6  11  13   8   5   4  10   6    3 |    5  12  13  10   8   4   9   5    6
  14  |   4  11  10   7   3   5  13   6    3 |    8  11  14   9   7   6  13   4    5
  15E |   7   9  10   5   4   5  18   6    3 |   13  10  17  14  11   9  18   8    9
  16  |   4  13   7   7   4   5  14   5    3 |    6  15  11  10   8   6  12   7    6
  17E |   5  13   9   8   5   5  16   6    3 |    6  13  11  11   8   6  15   6    7
  18  |   4  10   8   6   4   5  12   5    3 |   14  12  15  18  13  12  14  13   13
  19  |   5  10   9   7   3   7  12   6    3 |    3  12   7   8   4   4  13   6    4
  21  |   5  10   7  11   5   8  12   5    3 |    4  11   9  14   9   8  11   4    6
  22E |  18  13  15   9   5   9  15   6    5 |   20  14  14  17  15  13  20  13   14
  23  |   5  25  10  13   4   6  19   7    5 |   33  43  29  37  36  35  27  35   34
  24E |   6  10  10  11   5   6  10   6    3 |   10  16  12  17  14  11  16  11   12
  25  |   4   8  10   8   5   8  11   6    3 |    5  11  10  10   9   7  12   4    6
  26  |   4   8  10   8   5   5  12   7    3 |    5   8   9  11   6   6   7   5    5
  27  |   4  11  12   5   3   7  11   5    3 |    6  15  11  10   7   5  16   7    8
  28  |   5   7   9   4   3   5  13   4    2 |    5   5  10  10   8   4  13   6    6
  29  |   3   5   7   8   3   5  20   4    3 |    9   9   9  11   9   7  22   6    8
  31  |   5   9  15   5   3   5  15   4    3 |    6  11  12  10   7   6  18   4    6
------|--------------------------------------|--------------------------------------
 RMS  |   6  11  11   8   5   6  14   6      |T  12  15  13  15  13  11  16  11   11
 WRMS |   5  10  10   7   4   6  14   6      |NE 10  15  12  13  11  10  14  10   10
 MEDI |   5  10  10   7   4   5  13   6      |MD  7  12  11  11   9   7  15   6    7

Table 3.0858.1   GPS week: 0858   Day: 1   MJD: 50251.0

               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  12   6   4   5  12   9    3 |    5   8   9   9   7   7  12   7    6
   2E |   5  12  11   7   7   8  15   8    3 |   17  19  19  18  18  17  24  18   17
   3  |   5   9   8   4   7   8  22   6    3 |    5   6   9   9  10   7  18   5    4
   4E |   4   7  12   7   7   7  14   6    3 |   14  17  19  19  17  14  22  15   15
   5E |   6  11  22   5   5   5  16   4    4 |   15  16  20  13  15  12  21  13   13
   6  |   5   7   8   5   6   3  13   5    2 |    4   8   7   8   6   5  13   6    4
   7  |   2  11  10   6   3   5  32   4    4 |    6  11  11  10   7   5  22   5    7
   9  |   6  14  13   8   4   4  17   5    3 |    4  15  10   8   8   5  16   6    4
  14  |   5  11  10   6   5   5  14   6    3 |    6  15  10  13  10   7  15   4    6
  15E |   5   7  14   8   5   5  15   6    3 |    7  10  16  10   8   5  16   6    6
  16  |   4   9  20   8   4   5  21   4    4 |    5  12  13   8   7   5  15   4    5
  17E |   5  12  14  12   6   8  19   7    4 |    7  15  12  13  12   7  17   9    8
  18  |   5   9   9   6   5   7  10   5    3 |    7  10  11  11   9   6   9   8    7
  19  |   6   9   8   7   4   7  10   5    3 |    2  12   6   8   4   4  12   6    4
  21  |   4   4   7   9   5   6  10   5    3 |    4   8   6   7   7   7  10   5    3
  22E |  20  14  12   7   7  11  12  11    6 |   22  12  15  19  13   7  18   7   12
  23  |   5  23  17  10  12  10  30   8    5 |   47  44  44  49  52  51  44  47   46
  24E |   4   9  15   9   8   6   8   6    3 |   13  18  16  16  13  13  22  12   13
  25  |   3  10  13  10   6   6   8   9    3 |    5  14   8   8   8   4   9   6    5
  26  |   3  10  12   7   6   4  18   6    3 |    4   8   9   8   8   4  11   4    3
  27  |   4   9  15   8   4   6  13   4    3 |    6  13   9  14   8   6  20   6    6
  28  |   5   9   9   6   8   5  12   5    3 |    6   9   9   8   7   7  11   7    6
  29  |   4   7  11   4   6   6  19   4    3 |    6   8   8   7   7   5  12   6    4
  31  |   5   9  13   8   4   4  21   6    3 |    6   9   9   8   6   5  21   4    4
------|--------------------------------------|--------------------------------------
 RMS  |   6  11  13   8   6   6  17   6      |T  13  15  14  15  14  12  18  12   12
 WRMS |   4  10  11   7   6   6  17   6      |NE 12  14  13  14  14  13  17  12   12
 MEDI |   5   9  12   7   6   6  15   6      |MD  6  12  10  10   8   7  16   6    6

Table 3.0858.2   GPS week: 0858   Day: 2   MJD: 50252.0

               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  13   7   4   5   6  12   7    3 |    6  16  10   7   8   9   8   5    5
   2E |   8  16  13   8  10   8  13   9    4 |   20  27  19  20  20  18  25  19   18
   3  |   6  15   9   6   5   8  17   6    3 |    5  13  13  12   7   6  16   7    6
   4  |   4  10  18   6   8   7   9   6    3 |   12  21  24  16  14  15  16  12   14
   5E |   8  17  20   6   4   8  13   7    4 |   16  21  21  16  13  13  24  13   14
   6  |   5   9  11   7   9   4  12   6    3 |    4   7  14  10   9   6  16   5    5
   7  |   7  12   7   6   2   4  13   6    3 |    6  14   9   7   5   5  15   4    4
   9  |   5  14  11   6   7   4  11   5    3 |    3  13  11   9  10   5  16   5    5
  14  |   4  10  12   5   5   6  16   8    3 |    6  11  12   7  10   7  17   7    6
  15E |   6   9   8   7   4   5  23   8    4 |   10  11  11  11   8   7  22   8    8
  16  |   4  12  11   5   6   6  18   5    3 |    7  17  16  13  10   6  13   4    7
  17E |   5  15  13   7   5   6  21   8    4 |    7  13  12  12  10   8  19   8    8
  18  |   7  17  10   5   9   5  10   9    3 |   10  20  17  13  16  11  15  14   12
  19  |  17 --- --- ---  20  10 ---  14   10 |    0 --- --- ---   0   0 ---   0  ---
  21  |   7  19   7  10   5   6  11   7    4 |    4  24   9  16  11   8  15   7    8
  22E |  17  12  18   8   6  10  11   6    5 |   16  13  17  14  10  11  15  10   11
  23  |   7  35  12   8   5   5  23   7    5 |   47  72  41  55  49  47  52  52   49
  24E |   6  12  12   9   6   7   7   4    3 |   11  16  18  17  13  12  16  11   12
  25  |   5  12   8   5   3   6  10   7    3 |    5  13  13   9   7   5  13   5    4
  26  |   4  25  10   6  11   4  10   8    4 |    3  26   8   9  11   5   8   6    4
  27  |   4  23  14   7   8   9  19   7    4 |   10  32  17  13  12   6  25   9   10
  28  |   6  10   8   9   4   4  11   4    3 |    4   8  11  10   7   4  11   4    5
  29  |   4   4   9   3   5   6  20   4    3 |    9  13   9  10   7   9  18  10    9
  31  |   5  10  13   5   6   7  16   8    3 |    5  10  10  10   7   6  19   4    4
------|--------------------------------------|--------------------------------------
 RMS  |   7  16  12   7   7   7  15   7      |T  13  22  16  16  14  13  19  13   13
 WRMS |   6  17  10   7   6   7  15   7      |NE 12  24  16  17  14  13  19  14   13
 MEDI |   6  12  11   6   6   6  13   7      |MD  7  14  13  12  10   7  16   7    8

Table 3.0858.3   GPS week: 0858   Day: 3   MJD: 50253.0

               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   8   7   7   6   5  11   8    3 |    5   8   9   9   7   8  12   6    5
   2E |   6  13  24   9   8   6  18  10    5 |   21  22  23  23  24  23  27  25   22
   3  |   3  10  14   4   8   7  16   5    3 |    6   7  12  10   8   7  12   4    4
   4  |   4   5  12   6   7   6  14   6    3 |   15  16  20  17  16  12  24  12   15
   5E |   6  11  22   5   4   6  13   8    4 |   19  18  19  16  19  18  25  18   17
   6  |   5   6  10   7   5   5  13   7    3 |    4  10  12  11   8   6  15   7    6
   7  |   5  13   8   7   5   5  15   6    3 |    5  14   9  11   6   6  17   5    7
   9  |   5  11  15   9   7   4  12   6    3 |    6  15  12   9   7   4  12   5    5
  14  |   3   9  12   7   6   4   9   6    3 |    5  10  11   9   8   5  15   4    4
  15E |   6  10  16   8   8   6  13   9    4 |   11   8  20  12  11  12  13   6    9
  16  |   5  10  10   7   5   6  12   5    3 |    7  12   9  12   9   9  16   7    7
  17E |   6  13  12  10   5   5  14   6    4 |    6  13  13  13   8   6  16   6    7
  18  |   7   9   8   4   6   4  10   4    3 |    9   9  11   9   7  10  10   6    7
  19  |   5   7   9  10   8   7 ---   5    3 |    5  11   9  19   5   4 ---   7    6
  21  |   3   7   7   9   5   6  13   5    3 |    4   7   6   9   6   6  12   4    4
  22E |  12   9  16   9   8  11  11  10    5 |   21  14  20  18  15  14  17  13   15
  23  |   3  12  19   8   6  10  35   6    5 |   55  57  47  55  54  55  61  55   54
  24E |   5   6   8  10   6   6   9   6    3 |    9  14  12  15  12   9  16   9   10
  25  |   3   7   6   8   6   7  12   7    3 |    6  10  10  10   8   6  17   6    6
  26  |   3   8  10   8   4   4   9   5    3 |    4   9   8  13   5   6   9   7    5
  27  |   5  14   9   6   5   6   9   5    3 |    5  16   9  11   5   6  13   6    5
  28  |   4   9  12   5   4   4  12   4    3 |    6   7  13   8   7   4  13   5    5
  29  |   3   5   8   3   6   4  20   6    3 |   11  12   8  13   7  10  21   7    9
  31  |   5   8   9   7   6   7  11   5    3 |    4  10   8   8   5   7  12   5    3
------|--------------------------------------|--------------------------------------
 RMS  |   5   9  13   7   6   6  15   6      |T  14  16  16  16  15  14  20  14   14
 WRMS |   5   9  10   7   6   6  15   6      |NE 14  17  15  17  14  14  20  14   14
 MEDI |   5   9  10   7   6   6  12   6      |MD  6  12  12  12   8   7  15   6    7

Table 3.0858.4   GPS week: 0858   Day: 4   MJD: 50254.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igp jpl ngs sio  IGS |  cod emr esa gfz igp jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   7   8   9   4   3   5   9   9    3 |    6   9   8   8   7   8  10   6    5
   2E |   7  16  17  10   6   6  17   8    4 |   16  22  21  21  20  18  27  19   18
   3  |   5  11  10   7   4   7  13   6    3 |    5   7  11  12   7   6  14   6    5
   4  |   5   7  11  10   4   5   9   6    3 |    7  13  14  10   7   7  12   7    7
   5E |  10  20  27   6   4   6  14   6    5 |   20  20  34  19  17  17  23  18   19
   6  |   4   8   7   6   2   5  11   5    3 |    5  10   7   9   6   5  13   4    6
   7  |   6  13   8   8   5   5  18   4    3 |    4  14   9   9   8   5  16   8    6
   9  |   6  21  14   9   4   4  12   8    4 |    4  18  11   8   6   7  14   8    5
  14  |   5   8  18   8   7   5  11   8    3 |    5   8  12  12   9   7  13   7    6
  15  |   5   9  10   9   5   4  13   7    3 |   12   9  18  14  13  11  18  10   11
  16  |   3  11   9   8   7   5  12   5    3 |   10  12  11  12  13  10  18  12   10
  17E |   5  10   9  11   2   4  10   8    3 |    9  15  14  13  12  11  16  10   10
  18  |   7  10   8   5   2   5   8   7    3 |    8  10  11   8   9  11  11  11    8
  19  |   5   7   8   8   3   5  10   6    3 |    5  12   7  15   8   4  10   6    5
  21  |   6   8   8   7   3   7  15   6    3 |    6   8   8  11   6   7  12   6    4
  22E |  22  94  11   7  13  13  11  11    6 |   20  26  17  16  10   7  16   7   11
  23  |   5  10  13   8   4   6  17  10    4 |   47  54  40  55  48  49  46  54   49
  24E |   5   8   8   9   5   5  11   5    3 |    6  12  10  11   7   7  13   7    6
  25  |   4  11   7   6   4   6  11   8    3 |    6  15   9   8   7   8  11   6    6
  26  |   5   7  10   6   3   4   9   7    3 |    4   8  12  10   4   5   8   8    4
  27  |   4   8  11   6   3   5  10   4    3 |    7  10   8   7   6   5  12   4    5
  28  |   4   7  11   7   4   6  11   5    3 |    4   7  10   7   5   6  10   4    5
  29  |   5  11  10   4   4   4  18   8    3 |   17  24  15  16  13  17  20  15   17
  31  |   5   7  13   5   5   6  14   6    3 |    4   9   8   7   5   8  14   6    4
------|--------------------------------------|--------------------------------------
 RMS  |   7  22  12   7   5   6  12   7      |T  13  17  15  16  13  13  17  14   13
 WRMS |   6  20  10   7   4   6  12   7      |NE 12  17  14  16  13  13  16  14   13
 MEDI |   5  10  10   7   4   5  11   7      |MD  6  12  11  11   8   7  14   7    6

Table 3.0858.5   GPS week: 0858   Day: 5   MJD: 50255.0

               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  10  10   4   7   6   7   5    3 |    4   8   8   7   9   7  10   9    5
   2E |   4  29  14   6  10   6  16   6    5 |   18  28  19  19  21  16  29  17   17
   3  |   9  13   8  10   9   7  15   9    4 |    7  10   9  13  10   6  11   9    5
   4  |   5   8  10   9   7   4  14   7    3 |   10  10  20  12  13  10  18  11   10
   5E |   7  23  25   8   7   5  12  10    5 |   20  22  25  19  19  16  27  21   18
   6  |   5   8  10   7   6   4  11   5    3 |    4   9   9  11   8   5  13   4    5
   7  |   4  15   8   5  13   6  31   5    4 |    5  20   8   9  15   5  20   4    6
   9  |   4  16  12   5   5   3  14   7    3 |    5  20  10   7   7   5  15   7    5
  14  |  41 --- --- ---  40  21 ---  19   20 |    0 --- --- ---   0   0 ---   0  ---
  15  |   8  13  11   4   7   6  27   6    4 |    8  11  13   8   8   7  28   8    6
  16  |   4  11   9  12   4   5  12   6    3 |    6  15   9  12   8   7  13   7    6
  17E |   5  10  16   7   5   4   9   5    3 |    9  13  14  11  10   8  16   7    8
  18  |   4  12   7   4   5   4  11   5    3 |   10  13  13   9   9  10  14   6    8
  19  |   6   7   6   7   8   5  11   6    3 |    9  12   8  14   9   4  10   6    5
  21  |   7   9  10  12   5   4  13   6    3 |    4   5  10  10   6   5  12   6    4
  22E |  20   9  19   7   6  12  13  12    6 |   22  25  23  14  10   6  17   7   10
  23  |   5  26 ---   6   7   6  11   8    4 |   10  22 ---  10  11   9  12  11    9
  24E |   7   9  15  10   6   5  14   7    4 |    8  12  16  11  12   8  19   8    8
  25  |   5   9  11   8   5  10  17   5    4 |    6   9  10   8   7   8  14   6    5
  26  |   4  13  15   7   3   4  13   4    3 |    5  11  11  10   6   6  11   5    4
  27  |   5   8  17   6   5   4  13   4    3 |    8  11  11  10   5   4  14   7    6
  28  |   7  12   9   7   5   5  14   4    3 |    6  10  12   9   6   5  13   3    5
  29  |   6  13  12   6  10   5  25   7    4 |   16  20  16  12  13  15  23   9   13
  31  |   5  11   9   6   5   5  11   7    3 |    4  10   9   7   5   5  10   7    3
------|--------------------------------------|--------------------------------------
 RMS  |  11  14  13   7  11   7  16   8      |T  10  15  13  11  10   8  17   8    8
 WRMS |   6  13  11   7   6   7  16   8      |NE  7  13  11  10   8   7  15   7    6
 MEDI |   5  11  11   7   6   5  13   6      |MD  8  12  11  10   9   7  14   7    6

Table 3.0858.6   GPS week: 0858   Day: 6   MJD: 50256.0

               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   7   5   7   4   6  14   5    3 |    6   8   9  12   6   8  11   4    6
   2E |   5  11  11   8   5   5  15   7    3 |   27  31  25  24  26  24  33  27   26
   3  |   4   8   8   4   6   8  21   5    3 |    8   8   9   9   9   7  18   7    6
   4  |   5   5   8   8   4   6  11   6    3 |   10  15  18  16  12  12  17  11   12
   5E |   7  18  24   4   4   6  14   7    4 |   16  18  26  14  14  12  23  14   14
   6  |   7   6   8   8   4   5  10   8    3 |    6   8   9   8   7   6  10   4    5
   7  |   5  13   7   5   5   6  13   5    3 |    5  13   7   9   7   5  12   6    5
   9  |   6  22  10   3   4   4  13  12    4 |    4  23  13   8   6   6  13   6    6
  14  |   5  10  24   4   3   6  12  11    4 |   22  22  21  22  23  23  20  22   22
  15  |   7  11  10   6   6   5  11   6    3 |    9  10  17  12  14   8  15   7    8
  16  |   6  10  14   5   7   4  16   5    3 |    9  12  15  11  10   7  15   7    8
  17  |   7   9  13   8   4   4  10   6    3 |    7  11  17   9   7   8  14   8    8
  18  |   7   6   9   4   4   5   9   6    2 |   10  10   9  13   6  10   9   7    9
  19  |  18   9   7   7   4   7  20   7    4 |    8  13   6  13   6   4   9   5    6
  21  |   8   9   7   8   4   5  22   6    3 |    5   9   7  13   6   6  13   5    6
  22E |  18   8  11   8   3  14  15   8    5 |   16  12  10  12   7   9  18   6    7
  23  |   6  23  12   4   6   3  16   5    4 |   13  25   8  13  13  11  16  11   12
  24E |   8   5   8  10  10   6  11   6    3 |    8   9  11  12   8   9  12  10    9
  25  |   5   7   8   5   5   6  11   7    3 |    4  10   8   7   4   4  14   4    3
  26  |   6   7  13   9   4   3   9   6    3 |    4   6  10  10   5   6   9   6    5
  27  |   6  11  10   5   2   4  11   6    3 |    9  12   8   9   6   4  12   6    6
  28  |   6   8   9   5   5   4  12   6    3 |    6   7  10   8   6   6  10   6    5
  29  |   5   6   8   4   3   4  18   6    3 |   14  17  12  20  13  14  23  13   15
  31  |   8   8  10   5   3   5  15   6    3 |    5   8   9   7   4   4  16   5    4
------|--------------------------------------|--------------------------------------
 RMS  |   8  11  11   6   5   6  14   7      |T  11  14  13  12  10  10  16  10   10
 WRMS |   6  10   9   6   5   6  14   7      |NE  9  13  11  12   9   9  14   8    8
 MEDI |   6   9  10   5   4   5  13   6      |MD  8  12  10  12   7   8  14   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 4.0858   GPS week: 0858   MJD: 50250.0-50256.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2295 |U  53   33   87 |U  52   39  100 |   43   28   77 |
emr | emr 2244 |   39   29   77 |   36   30   74 |U  27   18   46 |
esa | esa 2038 |  123   62  179 |U  98   79  205 |  141   75  197 |
gfz | gfz 1138 |   34   27   72 |U  29   28   70 |   24   17   42 |
igp | igp 2282 |   50   30   74 |   43   34   87 |   34   25   66 |
igs | igs 2300 |   45   28   84 |   38   31   79 |   43   23   63 |
jpl | jpl 2280 |U  36   25   71 |U  32   26   68 |   25   16   43 |

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 5.0858.0   GPS week: 0858   Day: 0   MJD: 50250.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2300 |   55   31   76 |   53   42   93 |   43   35   84 |
emr | emr 2300 |   35   26   67 |   32   30   69 |   25   21   42 |
esa | esa 2048 |  225   87  261 |   99   92  173 |  109   49  112 |
gfz | gfz 1152 |   31   21   62 |   35   20   56 |   23   24   44 |
igp | igp 2291 |   35   26   65 |   35   28   64 |   26   23   48 |
igs | igs 2304 |   51   28   85 |   42   35   78 |   31   23   48 |
jpl | jpl 2278 |   32   24   66 |   32   28   65 |   25   20   42 |

Table 5.0858.1   GPS week: 0858   Day: 1   MJD: 50251.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2288 |   52   37   90 |   57   30   80 |   46   28   77 |
emr | emr 2291 |   44   34   82 |   31   22   54 |   24   14   42 |
esa | esa 2080 |  112   50  160 |  125  101  225 |  119   85  243 |
gfz | gfz 1152 |   41   32   55 |   28   17   48 |   21   15   41 |
igp | igp 2287 |   42   32   76 |   28   21   50 |   24   15   45 |
igs | igs 2292 |   49   34   83 |   37   24   56 |   28   21   52 |
jpl | jpl 2272 |   40   31   76 |   30   19   52 |   21   13   41 |

Table 5.0858.2   GPS week: 0858   Day: 2   MJD: 50252.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2289 |   57   33   90 |   47   36  107 |   52   28   96 |
emr | emr 2154 |   37   33   73 |   30   22   55 |   33   16   55 |
esa | esa 2015 |   72   48  136 |   56   71  156 |   62   39  138 |
gfz | gfz 1104 |   33   27   59 |   30   18   60 |   31   19   43 |
igp | igp 2258 |   89   41   76 |   69   51  134 |   49   45  111 |
igs | igs 2300 |   40   28   79 |   26   26   56 |   30   18   51 |
jpl | jpl 2284 |   36   26   68 |   22   19   49 |   26   17   48 |

Table 5.0858.3   GPS week: 0858   Day: 3   MJD: 50253.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2302 |   51   31   97 |   41   42   95 |   39   22   66 |
emr | emr 2300 |   37   26   82 |   27   37   75 |   24   15   38 |
esa | esa 2119 |   69   50  150 |   83   77  182 |   82   50  150 |
gfz | gfz 1152 |   28   28   91 |   27   41   85 |   21   15   36 |
igp | igp 2299 |   36   28   79 |   28   38   71 |   22   16   51 |
igs | igs 2303 |   37   27   88 |   33   38   80 |   28   15   49 |
jpl | jpl 2262 |   32   22   67 |   26   33   66 |   24   15   39 |

Table 5.0858.4   GPS week: 0858   Day: 4   MJD: 50254.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2293 |   53   33   86 |   54   43  115 |   41   28   57 |
emr | emr 2301 |   46   31   67 |   43   33   84 |   28   20   47 |
esa | esa 2112 |   90   56  120 |  140   89  319 |  229  115  241 |
gfz | gfz 1152 |   37   25   55 |   23   34   89 |   22   15   44 |
igp | igp 2303 |   44   28   64 |   40   28   86 |   27   18   52 |
igs | igs 2303 |   38   25   64 |   52   34  101 |   57   28   69 |
jpl | jpl 2289 |   38   25   63 |   43   28   84 |   24   16   42 |

Table 5.0858.5   GPS week: 0858   Day: 5   MJD: 50255.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2295 |   52   34   80 |   51   43  110 |   43   26   74 |
emr | emr 2059 |   41   30   86 |   43   33  101 |   28   16   49 |
esa | esa 1869 |  117   79  227 |   89   55  200 |  140   76  229 |
gfz | gfz 1104 |    0    0    0 |    0    0    0 |    0    0    0 |
igp | igp 2262 |   45   28   83 |   43   34  109 |   50   25   76 |
igs | igs 2297 |   41   28   96 |   38   32   98 |   42   20   64 |
jpl | jpl 2285 |   38   26   79 |   31   30   89 |   28   14   43 |

Table 5.0858.6   GPS week: 0858   Day: 6   MJD: 50256.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2301 |   47   34   89 |   56   34   95 |   34   27   78 |
emr | emr 2303 |   35   25   78 |   42   30   68 |   28   20   45 |
esa | esa 2022 |  106   50  153 |   61   52  121 |  173   79  221 |
gfz | gfz 1152 |   35   24   96 |   30   27   71 |   25   12   42 |
igp | igp 2273 |   36   24   75 |   40   28   67 |   28   19   48 |
igs | igs 2304 |   56   28   87 |   31   25   66 |   64   32   96 |
jpl | jpl 2290 |   35   23   76 |   34   24   62 |   25   17   43 |

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