Subject: [IGSREPORT-3728] Wk 0903 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Mon, 12 May 1997 6:16:09 PDT

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IGS Electronic Report    Mon May 12  6:16:09 PDT 1997      Message Number 3728
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0903 IGS Final Orbits

Final IGS Orbit Combination - Week 0903   (Apr 27, 1997 - May 03, 1997)

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 (IGS09037.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 and Springer, 1995, Combining the orbits of the IGS Analysis
   Centers, Bulletin Geodesique, 69, pp 200-222.

   Kouba, Mireault and Lahaye, 1995, 1994 IGS Orbit/Clock Combination and 
   Evaluation, Appendix I of the Analysis Coordinator Report, International GPS 
   Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.

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 Final Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:

 IGS09030-6.SP3  IGS GPS ephemeris files for days 0-6, week 0903 in SP3 format.
 IGS09037.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS09037.SUM    Complete report.

REMARKS on IGS Final 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. Rapid ("IGR") orbits/clocks are included in the combination for statistics
   only.

4. The following centre clock solutions, which provide broadcast clock
   corrections, were excluded from the combination but kept in the combination
   statistics:
            -> Centre: NGS 

5. Centre clock weights were determined using the following non-SA satellites:

                  Day | PRN list
                  ----+---------
                  0-6 |  15 

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 | Centre |  Time  |  Jump
                  ----+--------+--------+-------------
                   4  |  GFZ   | ~22:00 | ~ -426.7 ns
                   5  |  GFZ   | ~01:30 | ~ -91.5 ns

7. Higher clock RMS for NGS on day 0 were caused by clock jumps on PRN05.

8. State vector resets were modeled for the following satellites to
   alleviate the effects of modeling problems, experienced by all centres,
   in the Long Arc (LA) process:

          Day (Date) |   TIME   |  PRN  | Centres  | Reason
         ------------+----------+-------+----------+-------------------
          4 (May 01) | 00:00:00 |  14   |   All    | Modeling problems (a)

  (a) Due to unrealistic long arc RMS, PRN14 was excluded from the long arc 
      evaluation on days 0 and 4 for ACs that submitted solutions for 
      this satellite;

9. Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
   Final IGS solutions. The LOD combination uses AC LOD and AC orbit weights
   (for the time being) to determine combined IGS LOD values together with 
   integrated UT1-UTC values starting from the most current (and non predicted)
   UT1-UTC value of Bulletin A.

   AC LOD biases with respect to Bulletin A are estimated using Bulletin A
   most recent 3 weeks (21 days), i.e. up to the most current (and non
   predicted) UT1-UTC value of Bulletin A.  AC LOD biases are removed and the
   new AC bias-free LODs are used to compute a weighted IGS LOD which in turn
   is used to integrate UT1-UTC.

10.PRN28 was included in the Final combinations on days 4-6 of this week.
   Note that PRN28 was set unusable starting on GPS Wk 0878 day 1 (Nov 04, 1996)
   at 16:34 until further notice (ref. NANU 179-96309). 
   Note also that PRN28 has less tracking than other satellites and may have
   modeling problems from time to time. Finally, only COD submitted Final
   solutions for PRN28. For all these reasons, PRN28 should be used with caution for
   on these days.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS09037.SUM).

Table 1: Week 0903 summary.                       (Apr 27, 1997 - May 03, 1997)

Table 1.0903.a   GPS week: 0903   MJD: 50565.0-50571.0

         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  79 | .00  .01 -.01  -.06   .22   .12  -.2  .05  .05 |    5.3   -4.7     .5
        | .00  .00  .01   .13   .16   .22   .1           |   11.3   15.4
emr  31 | .01 -.01 -.01   .39  -.10   .28  -.1  .11  .10 |-8674.4   19.7     .5
        | .00  .01  .01   .13   .11   .22   .2           |23757.8   35.4
esa  54 | .00  .00  .01  -.10   .03   .19   .1  .06  .06 |    -.9  -32.1    1.3
        | .00  .00  .01   .14   .14   .09   .0           |   21.6   15.9
gfz  53 | .00  .00  .00  -.01   .00  -.20  -.1  .06  .06 |  317.6   73.9     .6
        | .00  .00  .00   .09   .12   .13   .1           |  174.2   37.3
igr  n/a| .00 -.02  .00   .14   .13   .08  -.1  .06  .05 |     .3    -.5     .6
        | .00  .01  .01   .18   .19   .19   .1           |     .7    1.7
jpl  37 | .00  .01  .00  -.06  -.06   .02   .3  .05  .05 |   34.5   25.0     .4
        | .00  .00  .00   .07   .09   .07   .1           |  299.8   30.3
ngs  49 | .01 -.05  .00   .17   .08  -.22  -.1  .15  .14 |    4.1   -3.1   90.9
        | .01  .01  .01   .32   .34   .24   .1           |    9.3   14.7
sio  116| .00  .00  .00   .00  -.21  -.16   .0  .09  .06 |     .0     .0     .0
        | .00  .01  .01   .08   .06   .11   .1           |     .0     .0

Table 1.0903.b   GPS week : 0903   MJD: 50565.0-50571.0

         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  |   2   2   2   2   2   2   2 |
   2  |   3   3   2   2   2   2   2 |
   3  |   3   3   2   2   2   3   2 |
   4E |   5   3   3   3   3   3   3 |
   5  |   2   3   2   2   2   3   2 |
   6  |   2   2   2   2   2   3   3 |
   7  |   3   2   2   2   2   2   2 |
   9E |   3   4   3   3   3   3   3 |
  10  |   2   2   2   3   2   2   2 |
  14  |   9   2   2   3   4   6   2 |
  15E |   3   4   4   3   3   3   3 |
  16  |   3   2   2   3   3   3   3 |
  17E |   3   3   3   3   3   4   3 |
  18  |   6   3   2   2   2   2   2 |
  19E |   3   6   3   2   2   3   3 |
  21  |   3   2   2   3   3   3   2 |
  22  |   3   2   3   2   3   2   2 |
  23  |   2   2   2   2   3   2   2 |
  24E |   4   3   3   3   3   4   3 |
  25E |   3   3   3   3   2   3   2 |
  26  |   3   4   3   3   3   3   2 |
  27E |   3   8   2   3   2   2   2 |
  28  | --- --- --- ---   0   0   0 | See Remark 10.
  29  |   3   2   2   2   2   3   2 |
  30  |   3   2   2   2   2   2   2 |
  31  |   2   2   2   2   2   2   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 2.0903.0   GPS week: 0903   Day: 0   MJD: 50565.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .01 -.01  -.07   .07  -.06  -.2  .07  .05 |   17.9  -19.3     .4
emr  31 | .00 -.01  .01   .34  -.30   .14  -.5  .11  .10 |  294.0   54.4     .4
esa  55 | .00  .01  .00  -.20   .29   .27   .1  .07  .07 |   12.3  -46.4    1.2
gfz  56 |-.01 -.01  .00   .17  -.15  -.16  -.1  .06  .06 |  295.2   55.5     .4
igr  n/a| .01 -.02 -.01  -.12   .12  -.17   .0  .08  .06 |    -.5    1.6     .6
jpl  37 | .00  .01  .00  -.04   .08   .14   .3  .07  .07 |  295.1   55.1     .3
ngs  50 | .01 -.03  .00   .15   .42   .30   .0  .18  .18 |   10.2   -8.2  140.7
sio  116| .00  .01  .00  -.05  -.23  -.21   .0  .07  .05 |     .0     .0     .0

Table 2.0903.1   GPS week: 0903   Day: 1   MJD: 50566.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .01 -.01  -.27   .01  -.13  -.3  .05  .05 |   21.1  -25.5     .4
emr  31 | .01  .00 -.01   .46  -.02   .50  -.1  .11  .10 |  360.8   39.6     .5
esa  55 | .00  .00  .01  -.01   .08   .20   .1  .06  .06 |  -11.7  -55.4    1.0
gfz  55 |-.01  .00  .00   .00  -.16  -.03  -.1  .05  .05 |  362.2   40.3     .4
igr  n/a| .00 -.04  .00   .39   .45   .32  -.3  .08  .08 |    -.5     .9     .5
jpl  37 | .01  .01  .00  -.03   .03  -.03   .4  .05  .05 |  362.0   40.1     .4
ngs  51 | .01 -.07  .00   .40   .24  -.21   .0  .13  .12 |   18.3  -24.1   78.5
sio  117| .00  .01  .01   .06  -.26  -.10   .1  .19  .09 |     .0     .0     .0

Table 2.0903.2   GPS week: 0903   Day: 2   MJD: 50567.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 |-.01  .01 -.01  -.20   .18   .04  -.3  .05  .05 |   -6.1   13.0     .4
emr  31 | .00 -.02 -.02   .65  -.04   .02   .0  .11  .11 |  401.5   71.1     .4
esa  54 |-.01  .00  .01  -.15  -.04   .34   .1  .06  .06 |  -20.5  -21.4    1.0
gfz  52 | .00  .00  .00   .04   .05  -.05  -.1  .05  .05 |  402.7   72.0     .4
igr  n/a| .00 -.02 -.01   .24   .29  -.10  -.2  .06  .05 |    1.4   -3.3     .4
jpl  36 | .00  .01  .00  -.04  -.03   .02   .1  .04  .04 |  402.6   71.7     .3
ngs  49 | .01 -.05 -.01   .23  -.10  -.29  -.2  .13  .14 |   -2.9    8.4   77.5
sio  118| .00  .01  .01   .03  -.14  -.13   .1  .05  .05 |     .0     .0     .0

Table 2.0903.3   GPS week: 0903   Day: 3   MJD: 50568.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  80 | .00  .01 -.02  -.01   .15   .08  -.3  .04  .04 |     .1   -5.8     .7
emr  30 | .01 -.01 -.01   .35  -.12   .59   .1  .11  .11 |   50.1     .5     .7
esa  54 | .00  .00  .01   .04  -.11   .23   .2  .07  .06 |  -13.8  -33.4    1.6
gfz  51 |-.01 -.01  .00  -.04   .07  -.33  -.1  .06  .06 |  466.7   63.2     .6
igr  n/a| .00 -.02  .00   .22   .16   .14  -.2  .05  .05 |     .8   -1.6     .7
jpl  37 | .00  .01  .00  -.14  -.08   .02   .4  .04  .04 | -208.1    2.9     .6
ngs  48 | .00 -.05  .02   .55   .55  -.38  -.2  .15  .15 |   -1.3     .2   79.3
sio  117| .00  .00  .00  -.05  -.12  -.06   .0  .05  .05 |     .0     .0     .0

Table 2.0903.4   GPS week: 0903   Day: 4   MJD: 50569.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  77 | .00  .01 -.01  -.02   .33   .08  -.1  .05  .04 |   -8.5   11.7     .6
emr  30 | .01 -.02 -.02   .35  -.05   .35  -.1  .10  .10 |-62550.    1.7     .5
esa  51 | .00  .00  .02  -.20  -.10   .11   .1  .07  .06 |   -7.6   -8.9    1.2
gfz  51 | .00 -.01  .01  -.05   .18  -.25  -.2  .05  .05 |  523.5   72.8    1.3
igr  n/a| .00 -.02  .00   .18   .04   .32   .0  .05  .04 |     .6   -1.5     .6
jpl  37 | .00  .01  .00  -.17  -.14   .05   .4  .04  .04 | -210.4    9.2     .5
ngs  48 | .02 -.05  .01   .28  -.24  -.42  -.3  .13  .13 |   -8.2   17.0   78.8
sio  114| .00  .01 -.01   .11  -.19  -.05   .0  .06  .05 |     .0     .0     .0

Table 2.0903.5   GPS week: 0903   Day: 5   MJD: 50570.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  79 | .00  .01 -.02   .14   .37   .35  -.1  .05  .05 |    5.1    6.3     .4
emr  31 | .01 -.02 -.02   .36   .02   .03  -.2  .10  .10 |  671.0  -24.9     .4
esa  54 | .00  .01  .02  -.27  -.02   .09   .1  .06  .06 |   42.3  -22.5    1.6
gfz  53 | .00  .00  .00  -.12   .01  -.19  -.2  .05  .05 |  104.1  154.7     .5
igr  n/a| .00 -.02 -.01   .13  -.11   .01   .0  .04  .04 |     .3    -.3     .5
jpl  37 | .00  .01  .00   .04  -.11   .01   .4  .06  .06 | -198.8   -1.3     .4
ngs  47 | .00 -.05  .01  -.45  -.38  -.28   .0  .14  .13 |    1.4    3.4   80.3
sio  114| .00  .00  .01   .02  -.29  -.24  -.1  .07  .05 |     .0     .0     .0

Table 2.0903.6   GPS week: 0903   Day: 6   MJD: 50571.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .01 -.01  -.03   .41   .50  -.3  .04  .04 |    7.6  -13.4     .4
emr  30 | .01 -.01 -.02   .22  -.18   .30   .0  .10  .10 |   51.4   -4.7     .5
esa  52 | .00  .00  .00   .09   .09   .12   .1  .06  .05 |   -7.5  -36.7    1.1
gfz  54 | .00 -.01  .01  -.07   .01  -.36  -.1  .06  .06 |   68.5   58.8     .5
igr  n/a| .00 -.02  .00  -.07  -.02   .02   .0  .05  .04 |     .0     .6     .6
jpl  37 | .00  .00  .01  -.04  -.15  -.08   .3  .04  .04 | -200.7   -2.6     .4
ngs  47 |-.01 -.04  .00   .06   .07  -.30  -.1  .14  .14 |   11.0  -18.7   83.0
sio  118| .00  .00  .00  -.12  -.26  -.35   .0  .06  .06 |     .0     .0     .0

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

         "E" stands for  eclipsing satellites.
         "T" stands for Total long arc orbit RMS 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 3.0903.0   GPS week: 0903   Day: 0   MJD: 50565.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4  10   5   5   3   5  13   5    2 |    5   9   8   5   8   7  16   8    5
   2  |   4  12   7   6   5   3  15   6    3 |    5   9   8   5   9   4  17   9    6
   3  |   4   9   5   6   4   7  10   5    3 |    4   6   5   5   7   7  14   6    4
   4E |   6  13   8   7   7   4  43   8    5 |    5  12   8   7  11   5  20   9    6
   5  |   6   9   5   3   6   3  16   6    2 |    6  10   6   6   9   5  18   8    6
   6  |   4   8   5   5   4   4  16   7    2 |    5   9   6   5   5   5  13   5    4
   7  |   3   9   6   5   5   4  13   9    3 |    4   9   5   5   6   5  11   5    3
   9E |   4  10   7   3   8   6  18   3    3 |    8  15   9  10  15   9  29  10   10
  10  |   6   8   6   6   5   5   9   5    2 |    7   6   8   7  11   6  19   9    8
  14  |  19  14 --- ---  25  24  21  12    9 |    0   0 --- ---   0   0   0   0  ---
  15E |   4  18   6   4  12   5  17   6    3 |    6  11   8   6  12   6  22   6    6
  16  |   5   6  10   6   6   5  16  10    3 |    8  11  10   8  13   7  22  13    9
  17E |   6   8  10   9   6   5  19   5    3 |    7  10   8  11  12   6  26   6    8
  18  |  13  14 ---  14   8  15  13  14    6 |   10  17 ---  18  11  15  18  17   10
  19E |   5  16   8   5  13   5  16   5    3 |    8  15  10  10  16   9  21   9    9
  21  |   6  11   6   5   4   6  10   6    3 |    6  12   8   7   9   7  16   5    7
  22  |   3   8   9   6   5   6  11   4    3 |    5   9   7   4   9   5  17   7    5
  23  |   5  10   7   6   7   4   7   4    2 |   14  11  16  11  13  11  17  13   13
  24E |   5  15   8   8   8   4  36   7    4 |    6  13   8   9  11   7  20  10    7
  25E |   6  13  12   6   8   6  19   5    3 |   11  18  16  14  14  11  19  14   13
  26  |   7  11   7   9   6   4   9   4    3 |    9  10   8   8   9   8  17  10    7
  27E |   4  10   6   6   6   3  16   6    3 |    6  13  10   7  10   6  21  16    8
  29  |   4   8   6   6   5   6  20   7    3 |    5   8   8   7   9   7  17   9    6
  30  |   5  10   7   4   5   3  20   4    3 |    5   8   7   6   9   6  18   6    6
  31  |   5   6   8   5   6   5  13   3    2 |    5   6   6   5   7   8  15   5    4
------|--------------------------------------|--------------------------------------
 RMS  |   7  11   7   6   8   7  18   7      |T   7  11   8   8  10   7  18   9    7
 WRMS |   5  10   7   6   6   7  18   5      |NE  6   9   8   7   8   7  16   8    6
 MEDI |   5  10   7   6   6   5  16   6      |MD  6  10   8   7  10   7  18   9    7

Table 3.0903.1   GPS week: 0903   Day: 1   MJD: 50566.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4   7   6   3   5   5  10   9    2 |    3   6   6   4   7   5  12   6    3
   2  |   3   7   6   4   7   3  11  18    3 |    4   6   5   4   7   5  12  18    3
   3  |   4   6   5   4   7   6  18   9    3 |    3   6   4   4   8   7  17   8    4
   4E |   4  12   5   6   7   4  13   7    3 |    3  11   6   6  10   4  16   9    4
   5  |   4   9   6   3   6   5   8  15    3 |    4   7   5   4   7   6  10  13    4
   6  |   3   6   3   4   4   2   9   7    2 |    5   7   6   4   6   5  10   7    4
   7  |   2   8   5   3   8   4  11   8    2 |    4   8   5   6   8   4   8   5    3
   9E |   6  15  12   4  13   6  16   7    4 |    7  16  10   9  17   7  21  11    9
  10  |   5   6   5   4   7   4  13   9    2 |    5   8   3   5   9   4  15   7    3
  14  |   3   9   5   4   7   3  10   5    2 |    9  12   6   9   8   9  10   9    8
  15E |   5  21   8   5  15   5  19   6    4 |    4  12   7   6  14   5  24   7    5
  16  |   3   9   4   4   5   3  11   6    2 |    6   8   7   7  10   6  13   9    6
  17E |   6  10   7   9   9   6  16   9    3 |    4  10   7   7  13   5  16   8    5
  18  |   7  12   3   4   8   3  10   9    3 |    7  14   6   7  13   7  13   7    5
  19E |   5  15   7   7   6   5  15  44    6 |   10  13  14  11  12   8  17  33    7
  21  |   4  10   4   4   7   4  10   5    2 |    4   8   5   5   7   7  10   6    5
  22  |   5   8   7   2   7   6  10   9    2 |    5  10   4   4   8   5  11   8    3
  23  |   5  10   7   4   8   4  11   6    2 |   11   8   9   8   7  10  11   9    8
  24E |   4  15   5   5   8   4  13  13    3 |    3  13   6   7  13   7  18  15    6
  25E |   5  10  10   6   7   6  13   6    3 |   10  12  10  13  15  11  21  10   10
  26  |   7  12   7  12   7   5  16   7    4 |    5   9   8   6   9   5  15  10    6
  27E |   6  13  10   9   8   9  10  70    8 |    4  10   6   5  10   6  10  73    8
  29  |   4   5   6   4   5   4  17   6    2 |    3   7   7   6  10   4  13   8    5
  30  |   3   7   5   4   6   4   7   7    2 |    3   8   6   4   8   5  13   7    4
  31  |   6   5   2   4   8   4  10   8    2 |    5   6   6   5   8   5  12   8    4
------|--------------------------------------|--------------------------------------
 RMS  |   5  11   6   5   8   5  13  19      |T   5   9   6   6  10   6  14  18    5
 WRMS |   5  10   6   5   8   5  12   9      |NE  5   8   5   5   8   6  12   9    4
 MEDI |   4   9   6   4   7   4  11   8      |MD  4   8   6   6   9   5  13   8    5

Table 3.0903.2   GPS week: 0903   Day: 2   MJD: 50567.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   5   6   5   6   4   5   8   6    2 |    4   7   8   5   5   5   9   7    4
   2  |   3  10   5   4   4   3  13   4    2 |    5   7   9   6   6   4  11   4    5
   3  |   4   7   6   4   4   7  13   4    2 |    3   7   6   4   5   5  15   5    4
   4E |   6  13   6   4   9   4  13   6    3 |    5  11  10   6  10   5  15   7    6
   5  |   5  11   3   3   2   3   9   5    2 |    6   7   8   5   6   5  15   4    5
   6  |   4   7   4   5   3   5  16   5    2 |    3   7   7   6   4   6  16   7    4
   7  |   3   8   7   4   5   4   8   4    2 |    4   7   5   5   4   5  11   5    3
   9E |   5  13  12   4   5   5  21   5    3 |    7  16  11   8  11   8  25  10    9
  10  |   6   9   3   4   5   3  12   4    2 |    6  11   8   5   8   5  11   6    6
  14  |   3  11   3   4   5   3  10   5    2 |    9  11   8   9  10  10  14  10    9
  15E |   6  18  10   5   9   5  25   6    4 |    7  15   9   8  11   6  22  10    7
  16  |   5  10   5   3   4   3   9   3    2 |    7  14  10   7   9   7  14   9    8
  17E |   7  14   7  10   5   5  17   4    3 |    6  13  10  10   7   6  16   8    7
  18  |   4  11   5   4   4   3   8   4    2 |    5  10   6   6   7   5  14   4    5
  19E |   4  16   6   6   5   3  12   5    3 |   10  21  13  14  16  11  16  22   12
  21  |   5   9   5   7   5   3   9   5    2 |    6   9   8   6   7   7  10   6    6
  22  |   5  14   5   3   5   4  18   5    3 |    4  16   8   4   5   8  17   7    6
  23  |   6   9   3   6   9   6  10   4    2 |   12  11  16   9  12  12  16  13   12
  24E |   6  18   5   5   7   2  17   6    3 |    5  13   6   5  10   4  20   7    5
  25E |   7  12  11   8  10   3  15   4    3 |    9  13   8  11  13   8  20   8    9
  26  |   6   8   6  10   7   5  14   5    3 |    6   8   8   8   8   8  12   7    7
  27E |   4  10   7   3   3   4   8   4    2 |    5  11  11   6   6   7  12  12    5
  29  |   3   8   5   5   5   5  10   4    2 |    5   8   9   5   6   5  12   5    5
  30  |   5   9   3   4   4   3  14   4    2 |    5   9   8   6   6   4  15   6    5
  31  |   6   8   4   4   5   5   9   6    2 |    4   8   6   5   6   6  13   7    3
------|--------------------------------------|--------------------------------------
 RMS  |   5  11   6   5   6   4  13   5      |T   6  11   8   7   8   6  15   8    6
 WRMS |   5  11   6   5   5   4  14   5      |NE  5   9   8   6   7   6  13   6    6
 MEDI |   5  10   5   4   5   4  12   5      |MD  5  11   8   6   7   6  15   7    6

Table 3.0903.3   GPS week: 0903   Day: 3   MJD: 50568.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   4   6   6   5   4   4  11   6    2 |    6   9   8   6   8   6  17   8    6
   2  |   3  12   4   5   5   3  18   4    2 |    5  10   7   5   7   4  16   5    6
   3  |   3   9   8   4   6   4  11   5    2 |    5  10   4   4   5   6  13   7    4
   4E |   5  13   5   8   7   4  23   5    3 |    5   8   6   7   8   5  20   7    5
   5  |   4  11   5   3   5   4  14   6    2 |    4   9   6   5   7   5  18   8    5
   6  |   2  13   5   5   3   4   9   4    2 |    6  15   6   7   5   6  13   5    5
   7  |   5  10   6   4   6   4  19   4    2 |    5   8   5   7   9   6  17   5    5
   9E |   4  12   6   5   5   4  19   7    3 |    6  17   9  10  10   9  24   7    8
  10  |   3   6   4   5   5   6  25   6    3 |    6   8   7   6   8   7  19  11    8
  14  |   7   9  12   4   4   7   8   6    3 |   16  20  10  16  16  22  17  22   17
  15E |   6  17   7   5   7   4  19   4    3 |    7  13   9   9  10   8  24   9    7
  16  |   5   8  13   3   4   3   7   3    3 |    7  10  10  10  10   7  20   8    8
  17E |   6  18   5   7   5   5  15   4    3 |    6  12   8   9   8   8  21   5    7
  18  |   4  11   5   4   3   2  10   5    2 |    5  12   4   6   7   5  18   6    5
  19E |   6  11   5   4   4   3  15   5    2 |   19  26  18  20  19  20  17  19   20
  21  |   5   8   5  11   5   5  10   7    3 |    5  10   7   7   9   7  18   7    7
  22  |   3   9   5   4   4   3  18   6    2 |    6   9   7   6   7   4  14   6    6
  23  |   4   8   5   7   4   4  12   6    2 |   12  12  11  10  11  11  21  12   11
  24E |   5  14   6   6   5   3  22   4    3 |    5  12   8   8   8   8  17   8    6
  25E |   5  10  10   6   9   4  19   6    3 |   14  18  15  17  14  13  21  16   15
  26  |   5  11   5  12   4   4  15   5    3 |    9   9   8   6   8   8  24   8    7
  27E |   4  18   9   5   4   2  13   4    3 |    5  13  11   7   8   6  17  12    6
  29  |   2   7   5   5   4   5   8   4    2 |    7   9   7   7   9   7  16   8    7
  30  |   4   8   4   4   4   3  10   6    2 |    4  10   6   5   6   5  17   6    5
  31  |   4  10   4   4   6   4  10   5    2 |    5  10   6   4   7   5  16   6    4
------|--------------------------------------|--------------------------------------
 RMS  |   4  11   7   6   5   4  15   5      |T   8  12   8   9   9   9  18   9    8
 WRMS |   4  11   6   6   5   4  15   5      |NE  7  10   7   7   8   8  17   9    7
 MEDI |   4  10   5   5   5   4  14   5      |MD  6  10   7   7   8   7  17   8    6

Table 3.0903.4   GPS week: 0903   Day: 4   MJD: 50569.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   5   6   4   3   4   3  13   4    2 |    6   8   7   8   8   6  16   7    6
   2  |   4   8   3   4   4   4  11   5    2 |    4   7   6   6   5   5  15   6    4
   3  |   3   6   6   4   4   5   8   5    2 |    5   6   6   4   6   6  15   5    4
   4E |   6  15   8   7   7   5  16   6    3 |    4  10   8   7   8   5  16   5    4
   5  |   3  10   5   3   5   3  13   7    2 |    4  10   4   4   6   4  15   8    4
   6  |   5   6   4   5   4   5  17   3    2 |    5   8   7   6   7   4  14   6    5
   7  |   4   8   3   4   4   4  10   6    2 |    6   7   5   5   6   6  14   4    4
   9E |   4  10  10   4   7   6  17   5    3 |    7  12   8   9  11  10  24   9    8
  10  |   4   6   4   6   6   3  10   6    2 |    4   6   5   6   6   6  18   8    5
  14  |   7   9  20   6   5   4  12   6    4 |    0   0   0   0   0   0   0   0  ---
  15E |   7  17   5   6   4   7  19   5    3 |    6  16  10   9  10   8  25   8    8
  16  |   6   8   8   3   4   3  17   3    3 |    9  11   8  10  11   9  19  10    9
  17E |   4  13   7   8   4   3  17   6    3 |    6  11   8   9   8   5  21   8    5
  18  |   4   9   4   3   4   4   8   6    2 |    7  11   6   8  10   8  20   9    8
  19E |   5  10   8   4   6   3  11   4    2 |    9  11  12  11  10  11  18   9    9
  21  |   6   6   5  10   2   7  10   6    3 |    5   7   7   6   5   7  16   7    5
  22  |   4   9   5   3   5   4  14   8    3 |    5  11   7   5   7   4  13   7    5
  23  |   5  10   6   5   5   5  16   6    3 |    9  11   9   8   8  10  24   9    9
  24E |   4  18   5   5   8   4  21   6    3 |    5  12   7   7   9   6  18   6    6
  25E |   5   8   9   4   5   3  12   6    2 |   13  16  17  15  12  13  22  13   14
  26  |   5   8   5  10   4   3  10   5    3 |    8  10   8   7   9   7  19  10    8
  27E |   4  11   5   5   4   2  11   5    2 |    4  13  10   5   7   5  17  10    5
  28  |   2 --- --- --- --- --- --- ---    0 |    5 --- --- --- --- --- --- ---    5
  29  |   4   6   4   4   4   4   8   5    2 |    7   9   8   8   9   7  19   9    8
  30  |   4   9   6   4   4   3   9   4    2 |    4  11   4   4   6   4  16   6    4
  31  |   4  10   6   4   3   4   9   6    2 |    7   9   7   7   6   5  16  10    6
------|--------------------------------------|--------------------------------------
 RMS  |   5  10   7   5   5   4  13   6      |T   6  10   8   7   8   7  18   8    6
 WRMS |   4  10   6   5   4   4  13   5      |NE  5   8   6   6   7   6  16   7    6
 MEDI |   4   9   5   4   4   4  12   6      |MD  6  11   7   7   8   6  18   8    5

Table 3.0903.5   GPS week: 0903   Day: 5   MJD: 50570.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   6   9   4   6   4   4   7   4    2 |    5   9   5   6   7   5  15   6    4
   2  |   5   6   5   3   5   4  11   8    2 |    5   8   5   4   6   4  17   9    5
   3  |   3   6   6   4   4   7  13   8    3 |    4   9   5   6   6   6  16  10    5
   4E |   5  15   5   4   5   5  17   8    3 |    3   9   7   4   6   3  17   6    4
   5  |   4   9   6   3   2   7  12   8    3 |    4  11   5   6   7   8  18   9    6
   6  |   5  12   3   5   3   4  15   5    3 |    4   8   4   4   5   6  16   5    4
   7  |   4   6   5   7   4   4  11   6    2 |    4   4   4   6   5   4  14   6    3
   9E |   6   9   7   4   2   4  17   5    3 |    7  15  10  10  11   9  26  11   10
  10  |   5   5   6   6   3   5   8   5    2 |    4   6   5   4   6   7  16   8    5
  14  |   8  11 ---   9   7  19  21  11    6 |    7  10 ---   8  11  19  15  10    9
  15E |   5  10   6   5   5   5  20   8    3 |    7  14   8   9  10   8  25  11    8
  16  |   6   8  13   6   4   6   9   7    3 |   17  17   9  16  16  17  26  17   15
  17E |   5  13   5   9   4   5  22   8    4 |    4  12   7   8   6   5  20   9    5
  18  |   5   7   5   4   3   4  11   5    2 |    8   8   5   5   8   6  20   8    6
  19  |   4  14   6   5   5   4  13   4    3 |    7  17  10   8   9   9  14   7    8
  21  |   6   8   8   6   3   6  10   7    3 |    4   8   7   5   5   8  15   6    4
  22  |   5   7   5   3   3   4  15   5    2 |    5  10   6   5   6   5  15   6    4
  23  |   4   7   5   5   5   5  12   6    2 |    6   8   6   9   7   8  17   9    7
  24E |   5  16   5   4   4   4  23   8    4 |    4  11   7   6   7   5  17   8    5
  25E |   6   6   7   6   5   6  11   7    3 |    9  11   8  11  13  11  17  14   10
  26  |   6   9   4   7   4   5   8   5    3 |    5   8   9   5   8   8  19   8    7
  27E |   4   8   6   4   4   4  15   4    2 |    4  12   6   6   7   6  21   7    5
  28  |   3 --- --- --- --- --- --- ---    0 |    4 --- --- --- --- --- --- ---    4
  29  |   4   8   5   5   3   5  11   9    3 |    4  10   7   5   6   5  17   7    5
  30  |   4  11   6   5   3   3  11   5    2 |    4  13   5   5   6   5  19   6    4
  31  |   3   7   4   3   4   4   9   7    2 |    5   8   5   6   5   5  16   8    5
------|--------------------------------------|--------------------------------------
 RMS  |   5  10   6   5   4   6  14   7      |T   6  10   6   7   8   8  18   8    6
 WRMS |   5  10   6   5   4   6  13   5      |NE  6  10   6   6   7   8  17   8    6
 MEDI |   5   8   5   5   4   5  12   7      |MD  5  10   6   6   7   6  17   8    5

Table 3.0903.6   GPS week: 0903   Day: 6   MJD: 50571.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz igr jpl ngs sio  IGS |  cod emr esa gfz igr jpl ngs sio  IGS
------|--------------------------------------|--------------------------------------
   1  |   7   7   5   6   3   2  12   2    2 |    9  10   9   8   9   7  17   9    8
   2  |   4   8   5   5   5   5   8   4    2 |    6   7   7   6   6   6  16   8    6
   3  |   4   9   5   4   4   5  11   6    2 |    6   8   6   6   5   6  16   8    5
   4E |   4  12   7   4   5   5  19   4    3 |    5   9   6   7   8   6  17   6    5
   5  |   3  11   5   4   3   4  13   7    2 |    5   8   5   5   6   5  19   9    6
   6  |   4  11   3   7   5   4  18   8    3 |    5  11   6   6   7   6  16   7    6
   7  |   3   6   6   6   7   3  14   5    2 |    6   9   5   9   8   6  17   5    5
   9E |   4   9   6   6   5   4  15   8    3 |   10  15  10  12  13  11  26  14   12
  10  |   4   6   6   5   2   3  17   4    2 |    5   8   6   7   7   7  18   8    6
  14  |   4   8   6   6   2   4   8   6    2 |    9  12  30  10   9  10  14   9    9
  15E |   5  12   9   7   7   3  20   8    3 |    9  16  12  10  12   9  26  11   10
  16  |   5   7  12   4   5   5  13   6    3 |   13  14  17  15  16  12  17  12   13
  17E |   5  14   5  10   6   4  20   9    3 |    9  14  11  12   9   7  24   7    9
  18  |   5   9   4   5   4   3  13   3    2 |   10  10   6  10  10   9  20  10    9
  19  |   4  18   3   6   6   4  13   5    3 |   10  18  12  10  12  11  12  11   11
  21  |   5   6   4   5   3   5  14   5    2 |    6   9   6   6   7   7  15   6    6
  22  |   3  11   5   4   3   3  12   6    2 |    6   8   9   7   6   7  19   7    7
  23  |   4   6   7   5   4   4  14   5    2 |   13  10  12  10   9  11  22  13   12
  24E |   7  17   6   4   6   4  19   6    3 |    5  12   8   9  10   6  20   7    6
  25  |   4   7   3   4   6   2  12   4    2 |   11  14  13  14  14  13  20  14   13
  26  |   5   7   4   6   4   3  14   5    2 |   10  11  10   8  11  10  22  11   10
  27  |   3   9   5   4   6   4  13   4    2 |    5  10   9   7   7   7  11   6    6
  28  |   4 --- --- --- --- --- --- ---    0 |    3 --- --- --- --- --- --- ---    3
  29  |   4   7   5   7   3   5   9   4    2 |    9  10   8   9   9   8  18  10    8
  30  |   4   8   6   5   3   2  14   5    2 |    5   9   5   5   5   4  21   7    5
  31  |   5   9   5   6   3   5  14   6    2 |    7   8   7   6   6   7  18   9    6
------|--------------------------------------|--------------------------------------
 RMS  |   4  10   6   6   5   4  14   6      |T   8  11  10   8   9   8  18   9    8
 WRMS |   4  10   5   6   4   4  14   6      |NE  8  10  10   8   8   8  17   9    8
 MEDI |   4   9   5   5   4   4  14   5      |MD  7  10   8   8   9   7  18   9    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 4.0903   GPS week: 0903   MJD: 50565.0-50571.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2435 |U  37   24   72 |U  44   29   74 |   27   15   42 |
emr | emr 2353 |   36   26   79 |   37   29   70 |U  27   16   42 |
esa | esa 2078 |   51   29   95 |U  42   27   75 |   32   18   47 |
gfz | gfz 1088 |   38   27   75 |U  33   30   67 |   27   17   43 |
igr | igr 2390 |   37   25   75 |   36   28   72 |   26   15   42 |
igs | igs 2436 |   38   25   74 |   44   29   72 |   27   14   42 |
jpl | jpl 2371 |U  37   24   73 |U  35   28   70 |   27   14   41 |

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 5.0903.0   GPS week: 0903   Day: 0   MJD: 50565.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2397 |   34   24   59 |   27   31   71 |   24   14   41 |
emr | emr 2202 |   31   24   68 |   34   36   68 |   28   15   39 |
esa | esa 1954 |   41   27   64 |   34   33   69 |   33   21   47 |
gfz | gfz 1131 |   33   27   56 |   30   23   49 |   27   17   43 |
igr | igr 2346 |   38   24   69 |   30   32   70 |   25   15   42 |
igs | igs 2400 |   34   23   59 |   27   32   66 |   24   14   39 |
jpl | jpl 2368 |   34   24   61 |   27   31   68 |   25   14   39 |

Table 5.0903.1   GPS week: 0903   Day: 1   MJD: 50566.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   33   25   80 |   44   24   76 |   26   16   46 |
emr | emr 2399 |   32   27   86 |   45   25   72 |   28   15   44 |
esa | esa 2134 |   37   26   81 |   46   23   75 |   27   16   48 |
gfz | gfz 1180 |   33   28   86 |   38   26   81 |   28   15   46 |
igr | igr 2395 |   33   25   84 |   46   27   75 |   27   15   45 |
igs | igs 2400 |   34   25   82 |   44   23   74 |   26   14   45 |
jpl | jpl 2360 |   34   24   83 |   44   24   73 |   28   14   45 |

Table 5.0903.2   GPS week: 0903   Day: 2   MJD: 50567.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   41   23   68 |   37   22   67 |   30   17   37 |
emr | emr 2395 |   40   25   73 |   37   24   63 |   28   17   36 |
esa | esa 2130 |   50   24   70 |   43   23   64 |   28   18   41 |
gfz | gfz 1182 |   45   26   64 |   43   23   67 |   22   18   37 |
igr | igr 2396 |   42   24   66 |   37   22   64 |   27   16   35 |
igs | igs 2400 |   42   23   67 |   38   23   65 |   28   16   36 |
jpl | jpl 2364 |   41   23   68 |   33   22   57 |   30   17   35 |

Table 5.0903.3   GPS week: 0903   Day: 3   MJD: 50568.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   37   28   87 |   32   24   61 |   27   15   42 |
emr | emr 2393 |   37   30   94 |   32   25   57 |   26   15   44 |
esa | esa 2095 |   71   38  140 |   39   26   71 |   31   18   45 |
gfz | gfz 1181 |   39   34  101 |   27   25   57 |   28   18   48 |
igr | igr 2400 |   36   30   91 |   31   25   61 |   26   15   42 |
igs | igs 2400 |   42   30   91 |   32   24   61 |   28   13   43 |
jpl | jpl 2369 |   36   28   86 |   31   25   60 |   27   13   43 |

Table 5.0903.4   GPS week: 0903   Day: 4   MJD: 50569.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2480 |   34   22   61 |   41   30   92 |   23   14   36 |
emr | emr 2400 |   35   21   65 |   42   30   87 |   23   16   32 |
esa | esa 2095 |   52   28   87 |   45   30   91 |   28   18   42 |
gfz | gfz  977 |   37   22   56 |   28   37   77 |   22   20   32 |
igr | igr 2394 |   33   20   63 |   40   31   89 |   23   14   36 |
igs | igs 2482 |   38   22   62 |   41   28   89 |   24   13   35 |
jpl | jpl 2374 |   37   22   60 |   40   31   90 |   23   12   33 |

Table 5.0903.5   GPS week: 0903   Day: 5   MJD: 50570.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2477 |   32   20   60 |   31   28   62 |   28   15   46 |
emr | emr 2381 |   33   22   67 |   33   31   62 |   30   15   46 |
esa | esa 2031 |   36   25   83 |   43   24   68 |   38   19   48 |
gfz | gfz 1178 |   31   19   65 |   35   42   73 |   28   17   48 |
igr | igr 2400 |   30   20   62 |   31   28   62 |   30   15   46 |
igs | igs 2478 |   31   20   61 |   32   30   61 |   30   14   46 |
jpl | jpl 2378 |   32   21   62 |   32   31   61 |   28   14   46 |

Table 5.0903.6   GPS week: 0903   Day: 6   MJD: 50571.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2491 |   44   27   80 |   76   37   84 |   27   16   47 |
emr | emr 2302 |   40   32   91 |   37   28   75 |   28   16   50 |
esa | esa 2108 |   57   31  113 |   43   27   83 |   36   17   54 |
gfz | gfz  788 |   47   28   86 |   30   31   57 |   28   13   46 |
igr | igr 2398 |   43   27   83 |   37   31   78 |   26   14   48 |
igs | igs 2492 |   45   28   86 |   75   36   81 |   27   14   48 |
jpl | jpl 2384 |   43   28   82 |   35   30   75 |   28   14   47 |

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