Subject: [IGSREPORT-2140] Wk 0820 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Tue, 7 Nov 1995 8:16:29 PST

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IGS Electronic Report    Tue Nov  7  8:16:29 PST 1995      Message Number 2140
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0820 IGS Final Orbits

IGS Final Orbit Combination Week 0820             (Sep 24, 1995 - Sep 30, 1995)

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 (IGS08207.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 IGS Final Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:

 IGS08200-6.SP3  IGS GPS ephemeris files for days 0-6, week 0820 in SP3 format.
 IGS08207.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08207.SUM    Complete report.

  The old Rapid Service files have been renamed to:

 IGR08200-6.SP3  Rapid Service ephemeris files for days 0-6.
 IGR08207.ERP    Rapid Service earth rotation parameters (ERP).
 IGR08207.SUM    Rapid Service 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. Centre clock weights were determined using the following non-SA satellites:
   PRN12, PRN15 and PRN28 on days 1, 5 and 6 (Sep 25, 29 and 30); 
   PRN12 and PRN15 on days 0 and 2 (Sep 24 and 26) since PRN28 exibited jumps
   of the order of 20 ns that corrupted the clock weights;
   PRN12 and PRN15 on day 3 (Sep 27) since PRN28 was not observed because of 
   a maneuver;
   PRN15 and PRN28 on day 4 (Sep 28) since PRN12 exibited jumps of the order 
   of 20 ns that corrupted the clock weights;

4. Starting with GPS week 818, COD is estimating satellite clock corrections
   and is no longer providing broadcast clock corrections.

5. PRN05 was set unusable from 12:18 until 21:48 on day 1 (Sep 25)
   (ref. NANU 210-95268). This explains the large clock RMS seen for NGS
   on day 1.

6. There was a maneuver of PRN28 on day 3 (Sep 27) (ref. NANU 211-95270).
   The ESA solution which modeled the maneuver is provided for that satellite
   on that day as the combined solution. An associated accuracy code of 0
   (unknown) was given since there was no redundancy. The ESA and the 
   combined solutions for PRN28 were excluded from the long arc evaluation on 
   day 3 due to unrealistic RMS caused by the maneuver.

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  
                    -------------+------+--------
                     6 (Oct 21)  | ALL  | SIO (a)

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

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
         ------------+----------+-----+------------------------------
          1 (Sep 25) | 00:00:00 | 02  |   ALL    | Modeling problems
          1 (Sep 25) | 00:00:00 | 26  |   ALL    | Modeling problems
          2 (Sep 26) | 00:00:00 | 06  |   ALL    | Modeling problems
          2 (Sep 26) | 00:00:00 | 17  |   ALL    | Modeling problems
          2 (Sep 26) | 00:00:00 | 22  |   ALL    | Modeling problems
          2 (Sep 26) | 00:00:00 | 23  |   ALL    | Modeling problems
          3 (Sep 27) | 00:00:00 | 28  |   ALL    | Maneuver 
             
9. 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 B 
   were used.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08207.SUM).

Table 1: Week 0820 summary.                       (Sep 24, 1995 - Sep 30, 1995)

Table 1.0820.a   GPS week: 0820   MJD: 49984.0-49990.0

         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  61 |-.01  .03  .01  -.32  -.24  -.10   .1  .10  .09 |     .5    -.7    1.8
        | .00  .01  .01   .14   .14   .08   .1           |    4.3    6.5
emr  28 | .02 -.01  .00   .03  -.09   .18  -.1  .10  .10 |-1792.8   -4.2     .9
        | .00  .00  .01   .22   .17   .11   .1           |    8.0    6.5
esa  44 | .01 -.01 -.04   .96   .20  -.33   .0  .16  .14 |    2.4    4.4   44.7
        | .01  .01  .01   .19   .25   .44   .1           |   21.2   40.3
gfz  45 |-.03 -.01  .01  -.14   .05  -.27  -.3  .11  .10 |-1787.1   -4.3    7.7
        | .01  .01  .01   .08   .14   .17   .2           |    6.3    6.9
jpl  34 | .01  .05  .00  -.38   .13   .30   .2  .11  .11 |-2624.6   -2.7     .8
        | .01  .01  .01   .13   .16   .14   .1           | 2999.4    7.0
ngs  42 | .02 -.02  .00  -.32   .11   .11  -.1  .14  .14 |  161.0 -245.6 3576.6
        | .01  .01  .01   .31   .07   .26   .1           |  424.7  643.6
sio  104| .00 -.05  .02  -.43  -.22   .03   .2  .12  .11 |     .0     .0     .0
        | .01  .01  .02   .78   .46   .34   .2           |     .0     .0

Table 1.0820.b   GPS week : 0820   MJD: 49984.0-49990.0

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

              Day of GPS week
 PRN  |   0   1   2   3   4   5   6 |  Remarks
------|-----------------------------|------------------------------------------
   1E |   9   7   6   6   4   5   7 |
   2  |   5   4   4   4   4   4   4 |
   4  |   4   4   4   4   4   3   4 |
   5  |   3   4   4   3   3   3   3 | Low tracking on day 1.
   6E |   7   4   4   5   4   5   6 |
   7E |   6   5   6   5   5   5   5 |
   9  |   4   3   4   4   3   4   4 |
  12  |   4   3   3   4   3   3   3 |
  14  |   4   3   4   3   3   3   3 |
  15  |   4   4   4   3   4   3   3 |
  16  |   2   4   3   3   3   4   3 |
  17  |   4   3   3   3   3   3   3 |
  18E |   5   4   5   5   4   5   6 |
  19  |   3   3   3   3   3   3   4 |
  20  |   3   4   4   3   4   3   3 |
  21  |   4   3   3   3   3   4   4 |
  22  |   6   4   4   4   5   4   4 |
  23  |   6   6   3   5   5   4   4 |
  24  |   4   3   3   4   3   4   4 |
  25  |   3   4   4   4   3   4   6 |
  26E |   8   7   5   5   6   5   7 |
  27  |   3   3   2   3   3   3   4 |
  28E |   4   4   5   0   5   4   5 | Maneuver on day 3.
  29E |   5   4   5   7   6   5   6 |
  31E |   5   5   6   5   5   5   5 |

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 2.0820.0   GPS week: 0820   Day: 0   MJD: 49984.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  61 |-.01  .01  .02  -.52  -.26  -.19  -.1  .12  .09 |   -3.3    7.9    1.7
emr  29 | .01  .00  .00  -.10   .07   .17   .1  .08  .08 |-1780.7   -3.9    1.0
esa  49 | .00  .00 -.04   .66   .05  -.19  -.1  .18  .16 |    4.5    5.4   20.3
gfz  47 |-.03  .01  .00  -.27   .14  -.39  -.1  .14  .12 |-1776.6    -.2    9.8
jpl  33 | .01  .05  .00  -.58  -.12   .34   .1  .13  .13 | -120.1    3.3     .9
ngs  41 | .02 -.01  .00  -.42   .09   .16   .1  .15  .15 |   -5.3    1.8   74.5
sio  105|-.02 -.07  .02   .13   .55   .26   .0  .15  .12 |     .0     .0     .0

Table 2.0820.1   GPS week: 0820   Day: 1   MJD: 49985.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  61 |-.01  .04  .01  -.48  -.06  -.19   .0  .11  .09 |     .6    1.2    1.6
emr  29 | .02 -.02  .01   .21   .18   .10   .0  .09  .09 |-1783.9   -8.8    1.0
esa  45 | .00 -.01 -.05   .88  -.01  -.67   .0  .19  .18 |  -28.3   16.4   28.6
gfz  47 |-.03 -.01  .00  -.20   .18  -.21   .0  .10  .09 |-1781.6   -3.8    6.7
jpl  33 | .01  .05  .01  -.39   .13   .45   .2  .11  .11 |-9277.6   -5.9     .9
ngs  43 | .03  .00 -.02  -.39   .19  -.13  -.2  .13  .12 | 1124.0-1705.0 9461.0
sio  104|-.02 -.04  .00   .04   .04   .46   .3  .12  .11 |     .0     .0     .0

Table 2.0820.2   GPS week: 0820   Day: 2   MJD: 49986.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  61 |-.01  .03  .02  -.18  -.07   .01   .0  .09  .08 |    -.9   -8.6    1.8
emr  27 | .02 -.01  .01  -.21  -.07   .23   .1  .10  .10 |-1793.7  -10.8     .9
esa  45 | .00  .00 -.02   .87   .38  -.99  -.1  .16  .16 |  -18.2   14.6   20.1
gfz  46 |-.02  .00  .01  -.10   .24  -.34  -.4  .09  .08 |-1786.6  -10.8    6.4
jpl  34 | .01  .06  .00  -.39   .34   .40   .3  .11  .12 |-1791.4  -11.4     .9
ngs  41 | .02 -.03  .01  -.05   .15   .03  -.1  .15  .14 |   -5.1   -1.5   74.1
sio  106|-.01 -.04 -.02   .21   .10   .16   .1  .11  .10 |     .0     .0     .0

Table 2.0820.3   GPS week: 0820   Day: 3   MJD: 49987.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 |-.01  .03  .00  -.21  -.23  -.06   .2  .10  .08 |     .7   -8.9    1.8
emr  29 | .01 -.01 -.01  -.18  -.32   .06  -.1  .10  .09 |-1793.6  -10.2     .8
esa  40 | .00 -.02 -.04  1.26  -.14  -.58  -.1  .14  .12 |   -5.2  -73.3   82.2
gfz  46 |-.03 -.01  .01  -.06  -.09  -.10  -.3  .11  .09 |-1788.9   -9.1    7.0
jpl  34 | .01  .06  .01  -.40   .09   .33   .3  .11  .11 |-1791.4  -10.1     .7
ngs  42 | .03 -.02  .00  -.69   .05   .14  -.1  .15  .15 |   -1.0   -2.4   77.1
sio  104|-.01 -.05  .04   .11  -.36   .10   .2  .12  .11 |     .0     .0     .0

Table 2.0820.4   GPS week: 0820   Day: 4   MJD: 49988.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  63 |-.01  .05  .00  -.19  -.35  -.02   .2  .10  .09 |    9.2   -1.4    1.8
emr  30 | .02 -.01  .01   .33  -.09   .09  -.3  .11  .10 |-1796.2    7.4     .7
esa  41 | .03 -.03 -.06  1.06   .18  -.23   .1  .15  .14 |   10.7   59.3   59.3
gfz  45 |-.03 -.01  .02  -.09  -.03  -.11  -.5  .10  .10 |-1792.9    9.1    8.6
jpl  34 | .00  .05 -.01  -.17   .02   .36   .2  .10  .10 |-1793.6    7.8     .3
ngs  43 | .01 -.01  .01  -.13   .03  -.24  -.2  .13  .12 |     .3    9.3   75.5
sio  100| .01 -.06  .03  -.52  -.50   .04   .1  .09  .09 |     .0     .0     .0

Table 2.0820.5   GPS week: 0820   Day: 5   MJD: 49989.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  61 |-.01  .03 -.01  -.33  -.34  -.09   .0  .10  .09 |    1.2    -.9    1.8
emr  27 | .01 -.01  .01  -.07  -.25   .23  -.1  .10  .10 |-1798.7    -.9     .8
esa  45 | .00 -.02 -.03  1.02   .53   .14   .1  .13  .11 |   28.4   19.1   18.7
gfz  43 |-.03 -.01  .01  -.17  -.10  -.15  -.4  .10  .10 |-1788.2   -8.0    7.5
jpl  34 | .01  .03  .00  -.48   .12   .08   .3  .10  .10 |-1797.2    -.3     .7
ngs  42 | .01  .00  .00  -.66   .22   .30  -.1  .13  .14 |   10.8  -14.0   75.9
sio  103| .01 -.06  .02 -1.21  -.65  -.29   .1  .12  .11 |     .0     .0     .0

Table 2.0820.6   GPS week: 0820   Day: 6   MJD: 49990.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  59 |-.01  .02  .01  -.32  -.40  -.17   .2  .10  .08 |   -4.0    5.9    1.8
emr  27 | .02 -.01  .00   .23  -.14   .37   .0  .11  .11 |-1803.1   -2.4    1.1
esa  45 | .01 -.02 -.05   .96   .43   .20   .1  .15  .12 |   25.0  -10.7   41.8
gfz  44 |-.03 -.01  .00  -.07   .00  -.56  -.3  .10  .09 |-1795.0   -7.2    7.7
jpl  34 | .00  .03  .01  -.27   .32   .11   .2  .09  .09 |-1800.5   -2.2    1.0
ngs  42 | .02 -.04  .01   .12   .08   .51  -.3  .14  .15 |    3.1   -7.6   75.2
sio  103| .02 -.05  .05 -1.76  -.73  -.55   .4  .14  .14 |     .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" flags eclipsing satellites.
         Units: cm.

Table 3.0820.0   GPS week: 0820   Day: 0   MJD: 49984.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz jpl ngs sio  IGS |  cod emr esa gfz jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1E |  14   7  32  18  27  18  41    9 |   28  24  35  27  41  25  27   23
   2  |  13   8  23  10  10  15  16    5 |    1   2   3   3   2   1   1    2
   4  |  10   8  23  12   8   9  12    4 |    4  10   8   8  10  12  10    6
   5  |   8   5  10   6   7   6  10    3 |    6   9  10   9   6  14  18    8
   6E |  29  19  16  13  12  15  13    7 |   70  51  53  53  60  58  52   56
   7E |  12   8  32  23  11  15  15    6 |    8  15  15  20   6  18  18   10
   9  |   7   8  12  13   6  16  12    4 |    7   8  13  10   7  19  20    9
  12  |  14   4   9   7   9  14  14    4 |   13  10  12  10  17  22  12   10
  14  |   9   6  10   7  12  14  11    4 |   10   8  10   9   8  11  14    6
  15  |   8   6  13   6  16   7  13    4 |    7   8  11   8   9  13  10    6
  16  |   6   5   7   9   8   5   7    2 |    5  12   7   9   9  11   8    7
  17  |   7   4  22   8   7  13   7    4 |   36  39  34  33  39  36  32   36
  18E |  11   6  21  15  13  17   6    5 |   20  16  28  22   7  16  19   15
  19  |   7   5   7   7   9  11   7    3 |    8  10  14  10   7  14  15    8
  20  |   8   6  14   7  10   8  11    3 |    6  10  11  10   9  15  16    8
  21  |   9   7   8   8  12  11  16    4 |    7  15  16  10   8  13  19   12
  22  |   9   9   9  32   9  11  13    6 |   44  57  51  51  53  52  49   52
  23  |  14   9  27  21  11  19  12    6 |   26  22  14  14  26  32  32   23
  24  |   9   7  21  10   6   9   7    4 |    3  10   9   8   7  10  10    6
  25  |   9   6   8   7   7  13   9    3 |   13  20  25  24  22  14  16   17
  26E |  12  12  11  16  25  30  32    8 |    1   3   4   3   5   2   1    2
  27  |   8   6  14   6   8  10   8    3 |    5   9  11  10   5  14  12    6
  28E |   9   6  13  13  16  11  10    4 |    5  14  19  19   4  15  15   11
  29E |  20   4  14   8  12  16   8    5 |   25  14  17  14  10  16  20   14
  31E |  14   9  13  10  13  21  16    5 |   17  24  23  24  15  26  22   20
------|----------------------------------|----------------------------------
 RMS  |  12   8  17  13  12  14  15      |   21  21  22  21  22  23  22   20
 WRMS |   9   7  15  12  12  14  11      |

Table 3.0820.1   GPS week: 0820   Day: 1   MJD: 49985.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz jpl ngs sio  IGS |  cod emr esa gfz jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1E |  14  11  40  13  18  10  20    7 |   28  36  32  33  15  30  36   30
   2  |   9   8  20   7   9   7  12    4 |    4   9  12  10   6  13  16    7
   4  |  10   8  20   9   9   8  14    4 |    6   8  10   7   6  10  11    6
   5  |   8   9  15   7  10  15  11    4 |    9   8  14  13   6  21  18    8
   6E |   9  10  19   9  12   8  13    4 |   38  40  39  38  39  35  33   37
   7E |  11   6  19  16  10  17  11    5 |    7  14  16  17   6  19  18   10
   9  |   7   6  13   4   7  11  10    3 |    4   9  13  12   6  14  14    7
  12  |   6   7  13   6   8   8  13    3 |    7   8   9   8   8  14  15    6
  14  |   5   7   8   5   7   5  11    3 |    6   7  11   8   7  15  16    6
  15  |   8   9  24   7   9  18  10    4 |    6  10   9   7   7  14  12    6
  16  |   5  10   8  10   6  18  10    4 |    7  12  14   9   7  12   7    6
  17  |   4   4  12   6   8  10   7    3 |   32  31  31  30  37  28  30   31
  18E |  16   9  13  11  12  11   8    4 |   16  17  13  13   8  20  17   11
  19  |   7   6  11   6   8   7   7    3 |    9   9  11  10   7  13  13    8
  20  |   6   8  27   9   8  11  12    4 |    6   9  12   9   5  17  21    8
  21  |   6   8  13   6  10  14   8    3 |    7  12  17  11   7  14  14    9
  22  |   9  10   9   8  10  14  14    4 |   44  56  48  49  52  40  42   48
  23  |  13  11  31  12  14  15  22    6 |   18  20  13  20  16  21  30   18
  24  |   7   9  11  11   6  12   9    3 |    4  12  11   8   6  12   9    6
  25  |  10   8  11   7   9  10  13    4 |    7  16  12  12   8  16  15   10
  26E |  17  13  25  22  16  24   9    7 |   14  22  21  26  13  23  20   19
  27  |   8   6  18   4   8   7   8    3 |    4   9  13  11   6  10  15    7
  28E |  11   7  16  13  13  12   7    4 |    4  18  18  19   4  19  14   11
  29E |  16   8  10   8  15   9  11    4 |   24  16  24  18  14  20  20   17
  31E |  16  13  22   8  12  17   7    5 |   15  19  26  19  12  25  16   16
------|----------------------------------|----------------------------------
 RMS  |  10   9  19  10  11  13  12      |   17  20  20  19  17  20  20   17
 WRMS |   8   9  17   8  11  12  10      |

Table 3.0820.2   GPS week: 0820   Day: 2   MJD: 49986.0

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

Table 3.0820.3   GPS week: 0820   Day: 3   MJD: 49987.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz jpl ngs sio  IGS |  cod emr esa gfz jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1E |  13   8  25  15  20  12  15    6 |   14  28  22  28   9  28  24   19
   2  |   9   8  13   6   9  12  11    4 |    4  11   8  11   6  17  16    7
   4  |   8  13  15  11  10  13  12    4 |    5  16   8   9   9  15  15    6
   5  |   7   7   8   6   7   9  11    3 |    6   8  11  10   7  17  15    6
   6E |  13  11  11  10  13  17  11    5 |   17  20  19  17   8  24  19   14
   7E |   8   9  12  16  10  17  12    5 |    6  15  24  19   7  21  23   12
   9  |   6   7  10   7   7  19  18    4 |    4  10  16  10   9  15  16    8
  12  |   4   9  11   6   7  16  15    4 |    7  12  13   9  11  21  10    8
  14  |   7   9  11   5  11   8  11    3 |    7   8  13   7  10  13  13    7
  15  |   6   8  13   7  11   9  10    3 |    8  14  10   8   8  15   9    8
  16  |   5  11  11   7   9   7   6    3 |    6  13  13   9   8  11  10    6
  17  |   6   6  12   6   6   9   7    3 |    4   8   9   6  10  17  12    5
  18E |  15  11  13   8  10  16   9    5 |   18  15  18  18   9  16  16   13
  19  |   6   7  13   9   9   9  11    3 |    7   9  12   9   6  17  17    7
  20  |  10   6   9   7   9  12  10    3 |    8  10  12  11   7  20  14    8
  21  |   7   5  11   8   6  12   7    3 |    6  12  20  12   8  15  13    9
  22  |   7  10  18   9   9   8  10    4 |    7  17  11  11   7  17  10    9
  23  |  13   8  10  20   7  15  11    5 |    9  11  12  13  10  16  14    8
  24  |   9  13  11  11   9  11  17    4 |    5  12  15  12  10  12  14    7
  25  |  10   8  13   7   9  10  12    4 |    8   9  11  13   7  17  15    7
  26E |   9   7  22  14  11  26  10    5 |   17  22  24  20  12  26  22   18
  27  |   6   7  11   6   8   9  11    3 |    6  11  11  10   6  14  15    7
  28E | --- ---   4 --- --- --- ---    0 |  --- ---   0 --- --- --- ---  ---
  29E |  22  11  14  12  15  33  13    7 |   26  15  30  21  14  20  25   17
  31E |  12  15  19  12  14  18  11    5 |   13  18  26  17  11  22  20   15
------|----------------------------------|----------------------------------
 RMS  |  10   9  13  10  10  15  12      |   10  14  16  13   8  18  16   10
 WRMS |   8   9  12   8  11  14  11      |

Table 3.0820.4   GPS week: 0820   Day: 4   MJD: 49988.0

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

Table 3.0820.5   GPS week: 0820   Day: 5   MJD: 49989.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz jpl ngs sio  IGS |  cod emr esa gfz jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1E |  10  15  19  11  16   9   9    5 |   13  34  25  31  10  29  24   21
   2  |   8   7  10   8   5  18   9    4 |    4  11  10  10   6  19  13    8
   4  |   8   6   7   6   8   6   8    3 |    8   9   9  10   5  10  11    6
   5  |   7   8  15   6   7   9   9    3 |    3  10  12  10   8  12   8    6
   6E |  10  14   8  12   9  19  14    5 |   10  20  12  15   6  18  13   10
   7E |   9   8  16  16   9  25   9    5 |   10  20  23  16   8  25  18   14
   9  |   7   7  14   5   7  14  10    4 |    4   9  13  10   9  12  13    7
  12  |   7   6   7   7   6   8  10    3 |    6  10  13  13   9  10   8    8
  14  |   9   9   8   5   7   8  11    3 |    5   7   9   8   6  10   8    5
  15  |   7   8  13   9   6   6  13    3 |    4  12   9   9   5   8  17    6
  16  |   5   9  22   7   9   8  12    4 |    5  12  14   9   6  13  14    6
  17  |   8   9  13   8   5   7   8    3 |    5   9   8  11   5   9   8    5
  18E |  13  12  10  10  11  18   7    5 |   15  14  15  20  10  19  14   12
  19  |   7  11  12   9   9   5   7    3 |    5  12  15  11   6  10  11    6
  20  |   5   7   9   5   9  10   9    3 |    6  11  12  10   6  15  10    7
  21  |   8   8  10   9   8  24  11    4 |    5  11  15  12   4  25  14    6
  22  |  10  12   9   8   9  12  14    4 |    8  11   9  10   5  15  20    7
  23  |   7   8   8  15   8  10  13    4 |   11  10  11  14  12  16  18   11
  24  |   7   9   9   6   5  12  17    4 |    5   8  11   8   7  18  14    6
  25  |  12   5  10   9   8  10  16    4 |    5  12  14  13   4  16  16    9
  26E |   6  11   8  10  14  20  12    5 |   10  23  22  20   8  30  20   16
  27  |   7   9  12   6   6   3   6    3 |    4   9  11  10   5  10  10    6
  28E |  10  11  14   9  14   9  15    4 |    4  20  20  14   6  14  18   10
  29E |  19  11  12  15  12  10  10    5 |   22  18  22  20  18  17  22   17
  31E |  11  16  15  14  13  12  14    5 |   14  23  20  19  15  22  21   16
------|----------------------------------|----------------------------------
 RMS  |   9  10  12  10   9  13  11      |    8  15  14  14   8  17  15   10
 WRMS |   8  10  11   9   9  14  11      |

Table 3.0820.6   GPS week: 0820   Day: 6   MJD: 49990.0

               Weighted Average                Orbit Dynamics (7 days)
 PRN  | cod emr esa gfz jpl ngs sio  IGS |  cod emr esa gfz jpl ngs sio  IGS
------|----------------------------------|----------------------------------
   1E |  13  13  26  18  14  12   7    7 |   11  20  21  23   9  22  17   14
   2  |   9   6  19   9   8   8  12    4 |    5  10  11  10   7  13  16    7
   4  |   6   4  11   5  11  16  13    4 |    7   9  13  11   6  14  16    7
   5  |   8  11   7   4   9   9  12    3 |    4  12  12   9   9  15  13    8
   6E |   9  16  24   9  12  11  10    6 |   20  24  22  19  10  20  17   16
   7E |  10  13  11  15  11  11  24    5 |    7  16  17  19   7  19  23   10
   9  |   7   8   9   7   7  15  13    4 |    4  12  13  10   7  14  13    7
  12  |   5   7   8   7   5   9  14    3 |    6  10  11  12   9  12  11    8
  14  |   8   7  11   5   7   5  14    3 |    7   9  10  10   7  12   8    7
  15  |   8   9  13   8   5   8  15    3 |    5  12  12   9   7  12  18    6
  16  |   5  10   8   5   5  10  18    3 |    9  14  12   8   9  14  20    8
  17  |   8  10  12   7   5   7   9    3 |    8   8   9   9   6   9  10    5
  18E |   9  16  11  12  10  24   8    6 |   17  17  20  20  13  22  17   16
  19  |   6   9  11  11   8  16  11    4 |    7   9  12  12   6  15  11    6
  20  |   9   8   7   6   7   8  12    3 |    7  10  12  10   8  14  14    8
  21  |  10   8  12   8   7  13   9    4 |   10  11  13   9   6  17   9    6
  22  |   7   9   6  10   8  11  11    4 |    4   9   9  13   6  13  14    6
  23  |  11   7   9  13   4  12  13    4 |   11  13  13  14  11  11  19   11
  24  |   7   5  16   4   5  17  17    4 |    4   7  13   9   5  14  20    7
  25  |   8  14  30  12  10  11  11    6 |    9  17  18  16   5  20  14    9
  26E |  17   8  18  11  15  32  24    7 |   13  21  25  23  15  42  22   18
  27  |   6   7  19   8   7   5  11    4 |    6   8  13   9   5  10  14    6
  28E |   9  11   7  15  11  15  16    5 |    6  16  14  15   5  15  22    9
  29E |  15  14  12  12  12  18  14    6 |   19  22  20  17  18  17  19   16
  31E |   8  17  14  12  10  11  16    5 |   22  29  24  22  21  25  31   23
------|----------------------------------|----------------------------------
 RMS  |   9  10  15  10   9  14  14      |   10  14  15  14   9  17  17   10
 WRMS |   8  10  12   9   9  15  13      |

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