[IGSREPORT-3592] Wk 0897 IGS Final Orbits

AC AC
Mon Mar 31 16:02:51 PST 1997


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IGS Electronic Report    Mon Mar 31 16:02:51 PST 1997      Message Number 3592
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0897 IGS Final Orbits

Final IGS Orbit Combination - Week 0897   (Mar 16, 1997 - Mar 22, 1997)

Contacts: J. Kouba (kouba at geod.emr.ca)
          Y. Mireault (mireault at geod.emr.ca), F. Lahaye (lahaye at geod.emr.ca)

COMBINATION STRATEGY:

For a complete description of combination strategy, please refer to the report
posted on CDDIS (IGS08977.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:

 IGS08970-6.SP3  IGS GPS ephemeris files for days 0-6, week 0897 in SP3 format.
 IGS08977.ERP    Earth rotation parameters (ERP) associated with ephemerides.
 IGS08977.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
                  ----+--------+--------+-------------
                   2  |  GFZ   | ~23:00 | ~ -185.2 ns
                   3  |  GFZ   | ~21:00 | ~ -5122.2 ns
                   4  |  GFZ   | ~14:00 | ~ 5160.8 ns

7. 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
         ------------+----------+-------+----------+-------------------
          2 (Mar 18) | 00:00:00 |  14   |   All    | Modeling problems (a)
          3 (Mar 19) | 12:00:00 |  02   |   All    | Modeling problems 
          3 (Mar 19) | 00:00:00 |  18   |   All    | Modeling problems 
          5 (Mar 21) | 00:00:00 |  16   |   All    | Modeling problems 
          5 (Mar 21) | 00:00:00 |  19   |   All    | Modeling problems (b)

  (a) Due to unrealistic long arc RMS, PRN14 was excluded from the long arc 
      evaluation on days 1 and 6 or ACs that submitted solutions for this
      satellite;

  (b) Due to unrealistic long arc RMS, PRN19 was excluded from the long arc 
      evaluation on days 0-1 and 5 or ACs that submitted solutions for this
      satellite;


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

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.

ORBIT COMBINATION AND EVALUATION STATISTICS:

For a complete description of tables and statistics, please refer to the report
posted on CDDIS (IGS08977.SUM).


Table 1: Week 0897 summary.                       (Mar 16, 1997 - Mar 22, 1997)

Table 1.0897.a   GPS week: 0897   MJD: 50523.0-50529.0

         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  84 | .00  .01 -.02  -.13   .16   .21  -.3  .06  .04 |    1.7    6.2     .5
        | .00  .00  .00   .07   .07   .31   .1           |   10.1   14.3
emr  30 | .00 -.02  .00   .28  -.30   .36  -.2  .10  .09 |   65.3   29.3     .4
        | .00  .00  .00   .10   .10   .20   .2           |   26.0   22.5
esa  53 | .00 -.02  .01   .19  -.06   .20   .0  .13  .10 |    1.0  -39.6    1.1
        | .01  .01  .01   .13   .14   .17   .1           |    6.9   10.3
gfz  50 | .00  .01  .01   .17   .10  -.19  -.3  .04  .04 | -689.3   60.4     .6
        | .00  .00  .00   .10   .12   .13   .1           | 1972.4    9.3
igr  n/a| .01 -.01  .00   .01   .06   .03  -.2  .08  .06 |    -.6    1.1     .5
        | .00  .01  .01   .12   .15   .17   .1           |    2.0    2.5
jpl  37 | .00  .01  .00  -.16  -.09   .07   .2  .07  .07 | -171.1    3.4     .4
        | .00  .00  .01   .06   .09   .14   .1           |  836.5   36.7
ngs  52 | .02 -.05  .01  -.40   .20  -.07  -.2  .14  .14 |    1.8    3.0   80.2
        | .01  .01  .01   .44   .17   .16   .1           |    6.5   11.4
sio  116| .00  .01  .00  -.16  -.07  -.37  1.1  .08  .06 |     .0     .0     .0
        | .00  .00  .01   .08   .09   .19   .2           |     .0     .0

Table 1.0897.b   GPS week : 0897   MJD: 50523.0-50529.0

         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 |   2   3   3   3   3   2   3 |
   2  |   3   3   2   4   3   3   2 |
   3  |   3   4   3   3   3   3   3 |
   4  |   2   2   2   2   2   2   2 |
   5  |   2   2   2   2   2   2   2 |
   6  |   3   3   2   3   3   3   3 |
   7  |   2   3   2   2   2   3   2 |
   9  |   3   2   2   2   2   2   3 |
  10  |   2   3   3   3   2   2   2 |
  14  |   2  13   2   3   2   3  12 | Modeling problems on days 1,6.
  15  |   3   3   3   2   3   3   3 |
  16  |   3   4   2   2   4   4   3 |
  17  |   3   3   2   2   2   2   2 |
  18  |   3   4   3   3   3   5   3 |
  19  |   3  48   2   2   3  18   3 | Modeling problems on days 1,5.
  21  |   2   2   2   2   2   2   2 |
  22  |   2   3   2   2   2   2   2 |
  23  |   2   3   3   2   3   3   2 |
  24  |   2   3   3   3   2   3   2 |
  25  |   2   2   2   2   2   2   2 |
  26E |   3   3   3   3   3   2   2 |
  27  |   3   4   3   2   2   5   2 |
  29  |   3   3   2   3   2   3   3 |
  30  |   2   2   2   2   2   2   2 |
  31  |   3   4   2   2   2   4   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 2.0897.0   GPS week: 0897   Day: 0   MJD: 50523.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  84 | .00  .01 -.02  -.14   .23   .55  -.3  .05  .05 |     .8   10.2     .3
emr  31 | .00 -.02  .00   .40  -.25   .14  -.1  .09  .08 |   56.8    8.8     .4
esa  54 | .00 -.02  .00   .21  -.22   .01   .0  .08  .08 |    9.5  -27.3     .6
gfz  50 | .00  .01  .01   .07   .05  -.14  -.3  .04  .04 |   33.6   62.3     .3
igr  n/a| .01 -.01  .00   .22   .07  -.18  -.2  .07  .06 |    -.1     .4     .4
jpl  37 | .00  .01  .00  -.12  -.03   .01   .2  .04  .04 |  151.0    7.9     .3
ngs  54 | .01 -.05  .01  -.64   .20  -.31  -.2  .13  .12 |     .6    2.0   78.9
sio  118| .00  .00  .01  -.02  -.11  -.53  1.2  .07  .07 |     .0     .0     .0

Table 2.0897.1   GPS week: 0897   Day: 1   MJD: 50524.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  85 |-.01  .01 -.02  -.20   .26   .57  -.2  .10  .05 |   19.1  -23.1     .5
emr  31 | .00 -.01  .00   .40  -.43   .42  -.4  .12  .10 |  103.5   41.1     .4
esa  54 | .01 -.01  .01   .18  -.21   .36   .0  .26  .16 |    7.7  -53.9    1.0
gfz  49 |-.01  .01  .00   .10   .28  -.25  -.2  .04  .04 |  104.8   41.7     .4
igr  n/a| .01 -.01 -.02  -.02   .38   .12  -.3  .13  .08 |    -.5    1.8     .7
jpl  37 | .00  .01  .01  -.14  -.20   .01   .1  .11  .11 |  168.0  -13.6     .5
ngs  53 | .03 -.04  .02  -.39   .10  -.06  -.1  .17  .18 |   15.1  -19.7   81.6
sio  121|-.01  .01 -.01  -.26  -.21  -.48  1.0  .10  .08 |     .0     .0     .0

Table 2.0897.2   GPS week: 0897   Day: 2   MJD: 50525.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  84 | .00  .01 -.01  -.06   .19   .34  -.4  .04  .04 |   -9.3   23.1     .4
emr  30 | .00 -.02 -.01   .21  -.26   .44  -.4  .08  .08 |   61.7   15.3     .5
esa  54 | .00 -.02  .00   .12  -.14   .31   .0  .08  .07 |   -8.0  -31.7     .9
gfz  49 | .00  .00  .01   .31   .27  -.40  -.3  .04  .04 |  143.5   69.9    1.2
igr  n/a| .02 -.01 -.01  -.10  -.09   .07  -.2  .06  .05 |    -.1     .9     .5
jpl  37 |-.01  .01  .00  -.27  -.20  -.08   .3  .04  .04 |  152.0   13.4     .4
ngs  52 | .02 -.06  .01  -.59  -.09  -.26  -.1  .13  .13 |   -5.3   13.8   81.4
sio  116| .00  .02  .00  -.23  -.14  -.10  1.0  .07  .07 |     .0     .0     .0

Table 2.0897.3   GPS week: 0897   Day: 3   MJD: 50526.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  84 | .00  .01 -.02  -.03   .07   .22  -.4  .05  .04 |   -1.1   13.5     .5
emr  29 | .00 -.02  .00   .19  -.20   .12  -.2  .10  .10 |   68.4    9.0     .4
esa  52 | .00 -.02  .00   .00   .00   .21  -.1  .08  .08 |   -6.5  -37.9    1.4
gfz  48 | .00  .00  .01   .30   .00  -.11  -.3  .04  .04 |  -41.1   66.2     .6
igr  n/a| .01 -.01  .00  -.01   .05   .16   .0  .04  .04 |     .4    -.4     .3
jpl  37 | .00  .01  .00  -.14  -.06   .15   .2  .05  .05 |  157.1   11.7     .5
ngs  50 | .03 -.04  .00  -.97   .40   .01  -.1  .13  .13 |     .4    3.1   79.5
sio  112| .00  .01  .01  -.18   .01  -.64  1.2  .06  .06 |     .0     .0     .0

Table 2.0897.4   GPS week: 0897   Day: 4   MJD: 50527.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  85 | .00  .01 -.01  -.11   .15  -.12  -.4  .05  .05 |   10.8    7.6     .5
emr  30 | .01 -.01 -.01   .15  -.33   .50  -.1  .08  .08 |   75.7   14.8     .4
esa  52 | .00 -.03  .00   .26  -.06   .26   .1  .09  .08 |    4.8  -33.5    1.5
gfz  51 | .00  .00  .01   .19   .03  -.31  -.4  .04  .04 |-5160.2   65.8     .5
igr  n/a| .01 -.01  .00   .11  -.01   .26  -.1  .05  .05 |    1.2   -1.2     .9
jpl  37 | .00  .02 -.01  -.10   .04   .34   .3  .04  .04 |  165.5   12.9     .4
ngs  51 | .02 -.05  .02  -.59   .38   .08  -.1  .13  .13 |    4.2   15.3   79.0
sio  118|-.01  .01  .00  -.12  -.01  -.33  1.1  .06  .06 |     .0     .0     .0

Table 2.0897.5   GPS week: 0897   Day: 5   MJD: 50528.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  85 | .00  .01 -.01  -.16   .14  -.21  -.3  .07  .04 |   -7.5    8.1     .4
emr  30 | .00 -.01  .00   .27  -.45   .67   .0  .10  .09 |   17.2   60.2     .4
esa  53 | .01 -.02  .01   .43   .15   .34   .1  .15  .09 |    2.2  -40.3    1.0
gfz  49 | .00  .01  .01   .06   .05  -.04  -.3  .04  .04 |   18.8   60.3     .4
igr  n/a| .00 -.01  .00  -.13   .05  -.15  -.3  .07  .04 |   -4.9    6.3     .4
jpl  37 | .00  .01  .00  -.19  -.05   .04   .1  .09  .09 |-2066.8  -65.1     .5
ngs  53 | .02 -.05 -.01   .31   .25  -.04  -.3  .13  .12 |   -1.0    2.8   79.6
sio  114|-.01  .01  .01  -.19  -.07  -.30   .8  .09  .06 |     .0     .0     .0

Table 2.0897.6   GPS week: 0897   Day: 6   MJD: 50529.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  81 | .00  .01 -.01  -.20   .07   .09  -.4  .05  .04 |    -.8    3.7     .5
emr  31 | .01 -.01  .00   .33  -.20   .23   .0  .10  .08 |   74.1   56.0     .5
esa  51 | .00 -.01  .01   .14   .07  -.09   .0  .08  .07 |   -2.7  -52.7    1.3
gfz  51 | .00  .01  .01   .17   .05  -.08  -.4  .05  .05 |   75.3   56.5     .5
igr  n/a| .01 -.02  .01   .02  -.06  -.07  -.3  .09  .06 |    -.5    -.1     .4
jpl  37 | .00  .01  .00  -.19  -.14   .03   .3  .05  .05 |   75.3   56.4     .4
ngs  52 | .02 -.04  .01   .05   .17   .11  -.2  .15  .17 |   -1.4    3.6   81.2
sio  115| .00  .01  .00  -.09   .05  -.21  1.1  .07  .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 3.0897.0   GPS week: 0897   Day: 0   MJD: 50523.0

               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
------|--------------------------------------|--------------------------------------
   1E |   4   8   5   3   8   4  12   7    2 |    6  11   6   6   9   6  13   8    6
   2  |   5  11   6   4   7   2  14   9    3 |    3   5   4   3   5   4   6  10    4
   3  |   6   9   9   4   8   5  19   8    3 |    4   8   9   4   6   5  17   7    4
   4  |   3   8   8   3   7   4  14   6    2 |    5   9   8   5   7   7  12   9    5
   5  |   4   6   4   3   4   3   9   7    2 |    4   7   8   6   7   6   8   8    5
   6  |   6  10   6   4   5   5  16   9    3 |    4  10   8   5   7   4  11   6    5
   7  |   5   8   8   4   6   5  11   6    2 |    5   9   7   4   8   4  14   7    5
   9  |   5  12   7   6   5   4  10   7    3 |    7  12   8   6   9   6  10   8    6
  10  |   3   6   9   4   6   5  11   6    2 |    6   8  12   7   7   5  13   7    5
  14  |   5  11   6   3   8   3  10   7    2 |    1   1   1   1   1   1   2   2    1
  15  |   3  11  12   3   7   4  11   5    3 |    5   8  10   6   7   6  15   8    6
  16  |   8   8   8   5   7   6  11   7    3 |    5  11   9   5   6   5  13   6    4
  17  |   4   7  11   3   5   4  14   6    3 |    4   9   8   5   6   5  14   7    4
  18  |   7   7   8   6   7   5  19   9    3 |    3   8   7   5   6   3  15  11    4
  19  |   6  11   8   5   8   6  13  12    3 |    0   0   0   0   0   0   0   0  ---
  21  |   3   6   4   3   3   4  11   8    2 |    5   8   7   7   6   5  12   6    5
  22  |   5   5   6   2   8   4  11   7    2 |    3   7   8   5   9   5  11  10    5
  23  |   4   7   9   2   5   5   9   9    2 |   12  13  11  12  11  13  14  18   12
  24  |   4   7   8   4   4   5  11   8    2 |    6  10   7   6   7   5  12   9    6
  25  |   3   6   9   5   4   4  10   9    2 |    5   8   8   6   7   4  11   9    5
  26E |   5  10  10   2   6   6  12   5    3 |    6  11  15   6  10   5  16   6    7
  27  |   6   9  12   3   5   4  12   8    3 |    9  10   8   8   8   7  12  10    7
  29  |   4   7  10   3  10   4  15   5    3 |    6   9   8   5   9   4  15   6    5
  30  |   5   7   8   2   4   3   9   6    2 |    4   7   9   6   6   5   9   7    5
  31  |   7   9   6   3  12   4  14   5    3 |    6   8  10   5  10   4  14   3    4
------|--------------------------------------|--------------------------------------
 RMS  |   5   9   8   4   7   4  13   7      |T   5   8   8   5   7   5  12   8    5
 WRMS |   5   8   8   4   6   4  12   7      |NE  5   8   8   5   7   5  11   8    5
 MEDI |   5   8   8   3   6   4  11   7      |MD  5   9   8   6   7   5  13   8    5

Table 3.0897.1   GPS week: 0897   Day: 1   MJD: 50524.0

               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  10  12   4   9   4  12   8    3 |    4  12  14   6   9   5  15   9    6
   2  |   4  10   7   4   7   6  18  12    3 |    2   9   6   4   6   5   8   9    4
   3  |   6   7   8   6   8  10  22   8    4 |    3   8   8   5   6   5  22   7    4
   4  |   4   9   7   2  14   4  15   6    2 |    5   8  11   6   9   5  12  10    5
   5  |   5  10   5   2   3   5   9   5    2 |    3   9   8   5   6   6  11   8    5
   6  |   6   8   6   3   8   6  14   8    3 |    3  10   8   6  10   4  11   6    4
   7  |   5   7  13   3  10   6  11  10    3 |    4   9  10   5  10   7  12  13    4
   9  |   4  11   5   5   6   5   9   5    2 |    4   9   7   4   8   5   9   7    4
  10  |   4   8  12   3   7   5  17   8    3 |    4   7   8   4   8   5  16   7    4
  14  |  23  33 --- ---  30  19  43  15   13 |    0   0 --- ---   0   0   0   0  ---
  15  |   6  16   8   4   9   4  19   8    3 |    7  15   8   7   7   6  14   8    5
  16  |   4  13   8   7  11   6  12  18    4 |    5  16   8   4  11   5  15  15    5
  17  |   4   8   5   3   7   5  15   8    3 |    4  11  10   7   7   6  14   9    4
  18  |   5  20  11   5  14   3  12  15    4 |    4  22   9   4   8   4  13  16    5
  19  |  39 --- 120 --- ---  46 --- ---   48 |    0 ---   0 --- ---   0 --- ---  ---
  21  |   4   5   5   3   4   5  13   8    2 |    3   6   6   6   5   5  11  10    4
  22  |   7   9  10   3   8   3  14  11    3 |    3   9   8   4   7   4  16  15    4
  23  |   3   9   7   4   7   4   9  18    3 |    7   9   7   6   7   7   9  18    7
  24  |   4   9   7   4  13   9  16  11    3 |    7  10  11   7   9   5  13  11    6
  25  |   3   5   7   4   8   6   9   6    2 |    3   7   7   6   8   7  11   6    4
  26  |   4  11   8   4  14   4  16   8    3 |    4  12   8   6  13   5  14   6    5
  27  |   8  12  14   5  30   4  19  11    4 |    8  12  10   6  18   7  15  15    6
  29  |   5  10   8   4  14   4  24   7    3 |    4  12   9   4  11   5  17  10    4
  30  |   5   9   4   3   6   4   8   5    2 |    3   6   6   4   7   6   8   5    4
  31  |   5  11  13   6  14   4  17  13    4 |    4  10  12   5  11   4  17   9    4
------|--------------------------------------|--------------------------------------
 RMS  |  10  12  26   4  13  11  17  10      |T   4  10   8   5   9   5  13  10    4
 WRMS |   5  10  16   4   8  11  18   8      |NE  4  10   8   5   8   5  13  10    4
 MEDI |   5  10   8   4   9   5  15   8      |MD  4   9   8   5   8   5  13   9    4

Table 3.0897.2   GPS week: 0897   Day: 2   MJD: 50525.0

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

Table 3.0897.3   GPS week: 0897   Day: 3   MJD: 50526.0

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

Table 3.0897.4   GPS week: 0897   Day: 4   MJD: 50527.0

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

Table 3.0897.5   GPS week: 0897   Day: 5   MJD: 50528.0

               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   9   5   4   4   4  11   6    2 |    3  10   8   5   6   5  15   5    5
   2  |   6  10  10   5   3   4   6   4    3 |    3  10   5   3   5   5   7   5    3
   3  |   4   7  11   4   3   7  14   7    3 |    3   9  10   3   4   8  13   6    4
   4  |   3   8   7   2   3   4  15   5    2 |    5   9  10   6   5   4  17   7    7
   5  |   6  12   5   4   3   5   6   5    2 |    3  11   9   5   6   6   8   5    6
   6  |   6  11   6   4   5   5  14   6    3 |    7  11   7   7   8   6  13   9    6
   7  |   6   9   8   6   4   7   8   3    3 |    3   9   8   4   6   5  14   6    5
   9  |   4   8  10   3   4   5  12   5    2 |    4   9   9   4   6   4  10   8    4
  10  |   4   8   6   3   3   5  10   7    2 |    5  11  12   5   6   5  13   9    7
  14  |   4  10  12   4   2   3  10  10    3 |    3   9   9   4   6   4  12   9    4
  15  |   5  15  11   3   3   6  19   5    3 |    5  14  15   6   7   6  12   8    7
  16  |   6   7  33   6   4   5  12   7    4 |    5   6  13   5   5   7  11   6    4
  17  |   4   6   9   3   3   3  10   7    2 |    4   8   5   5   7   3  11   7    4
  18  |   5   8  23   4   6   3  34  14    5 |    5  11  14   5   8   4  22  15    5
  19  |  27  20 --- ---  29  38 ---  30   18 |    0   0 --- ---   0   0 ---   0  ---
  21  |   5   8   5   5   2   3  10   7    2 |    4   8   8   5   4   5  10   6    5
  22  |   4   8   8   3   4   3  11   5    2 |    4  10   7   3   5   6  12   6    6
  23  |   4   5  13   4   4   4   9  12    3 |    7   8  10   8  10   9  15  15    8
  24  |   4   8  10   3   2   7  15   5    3 |    6  12  16   7   6   4  18   7    9
  25  |   7   8   7   3   5   4  12   5    2 |    4   7   7   5   6   6  16   5    5
  26  |   4  10   9   3   3   5  10   6    2 |    4  14  13   6   9   6  14   7    7
  27  |   6  10  39   4   6   7  13   6    5 |    6  12  23   7   7   9  14  13    7
  29  |   3  12  11   3   3   3  12   5    3 |    4  12   8   4   6   5  14   6    5
  30  |   3   8   5   4   3   4   6   4    2 |    3   8   8   4   6   6   8   6    5
  31  |   4  11  21   6   7   5  11   9    4 |    4   8  16   4   8   4  12   8    5
------|--------------------------------------|--------------------------------------
 RMS  |   7  10  15   4   7   9  13   9      |T   4  10  11   5   6   5  13   8    5
 WRMS |   4   9   9   4   4   9  12   6      |NE  4   9  11   5   6   5  13   8    5
 MEDI |   4   8  10   4   3   5  11   6      |MD  4  10   9   5   6   5  13   7    5

Table 3.0897.6   GPS week: 0897   Day: 6   MJD: 50529.0

               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   9   8   4   6   4  14   7    3 |    6  12   9   5   9   5  12   6    5
   2  |   3   6   3   7   4   6   6   5    2 |    3   7   4   4   6   3   6   4    3
   3  |   2   6  10   5   7   6  20   7    3 |    4   8   8   4   9   5  19   8    3
   4  |   4   6   5   4   6   4   9   4    2 |    7   9   9   6  10   5  13   6    6
   5  |   3   6   5   3   4   3   9   5    2 |    4   8   8   6   6   7   8   5    5
   6  |   4   9   7   4   9   3  15   7    3 |    5  11   6   7  10   7  17   9    6
   7  |   5   7   4   4   6   4  17   4    2 |    6   8   6   4   8   5  16   5    4
   9  |   5  14   7   7   5   5  18   8    3 |    5  16   8   6   8   8  14   6    5
  10  |   3   8   6   5   6   4   9   5    2 |    5   8   7   7   6   5  13   7    5
  14  |  17  35 --- ---  34  17  46  13   12 |    0   0 --- ---   0   0   0   0  ---
  15  |   5   5  10   3   4   5  11   6    3 |    6   6  11   6   8   6  11   5    5
  16  |   3  10  10   8   5   4  14  12    3 |    5  12  10   5   8   4  16   6    5
  17  |   3   7   5   6   6   4  14   7    2 |    5   8   6   5   8   5  12   5    4
  18  |   5   8  14   4   7   4  13   7    3 |    4   6   9   7   9   3  16   8    5
  19  |   5   9  11   6   9   5  12   8    3 |    4   4   3   3   3   4   3   7    4
  21  |   5   5   5   5   4   5   9   6    2 |    5   8   6   7   6   7   9   7    5
  22  |   4   8   8   3   4   3  10   5    2 |    5   9   9   6   7   5  13   7    5
  23  |   3   6   6   5   5   4   7  10    2 |   12  11  11  12  11  11  13  19   12
  24  |   4   7   7   3   5   5  12   5    2 |    7  10  12   7   9   5  14   7    7
  25  |   4   7   5   5   7   4  14   5    2 |    7   8   8   6  10   6  14   5    5
  26  |   4   8   9   4   6   4  10   6    2 |    6  11  10   5   9   6  14   7    6
  27  |   3   5   7   5   5   5  11   5    2 |    7   8  12   6   7   6  10   8    6
  29  |   3  10  10   4   5   3  12   7    3 |    6  11   6   7   8   5  14   7    5
  30  |   2   6   6   4   5   3  11   5    2 |    5   7   7   6   7   7  10   5    5
  31  |   4   7  10   6   7   4  11   7    3 |    5   9   8   5   8   4  14   6    4
------|--------------------------------------|--------------------------------------
 RMS  |   5  10   8   5   9   5  15   7      |T   5   9   8   6   8   5  13   7    5
 WRMS |   4   8   7   5   6   5  17   6      |NE  5   9   8   6   7   5  12   7    5
 MEDI |   4   7   7   5   6   4  12   6      |MD  5   8   8   6   8   5  13   7    5

 
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 4.0897   GPS week: 0897   MJD: 50523.0-50529.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |U  45   29   90 |   37   25   60 |   22   12   41 |
emr | emr 2354 |   45   29   93 |   37   25   60 |   23   13   43 |
esa | esa 2046 |U  49   32   92 |   41   28   63 |   30   16   50 |
gfz | gfz 1148 |   43   30  100 |   41   30   68 |   26   16   46 |
igr | igr 2339 |   46   29   89 |   36   26   61 |   23   13   44 |
igs | igs 2400 |   45   29   88 |   37   25   61 |   23   12   42 |
jpl | jpl 2399 |U  45   29   90 |   37   25   62 |   23   12   42 |


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 5.0897.0   GPS week: 0897   Day: 0   MJD: 50523.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   46   35   92 |   33   28   82 |   18   11   36 |
emr | emr 2389 |   46   34   93 |   34   30   81 |   18   10   36 |
esa | esa 2098 |   47   36   86 |   40   32   87 |   21   17   36 |
gfz | gfz 1168 |   38   33   96 |   20   31   85 |   19   11   31 |
igr | igr 2371 |   46   36   88 |   35   28   86 |   18   14   35 |
igs | igs 2400 |   45   35   90 |   35   28   84 |   18   12   33 |
jpl | jpl 2400 |   46   35   92 |   34   28   85 |   19   12   35 |

Table 5.0897.1   GPS week: 0897   Day: 1   MJD: 50524.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   44   28   90 |   41   19   50 |   19   10   35 |
emr | emr 2274 |   47   28   97 |   44   13   59 |   23   11   43 |
esa | esa 1992 |   43   30   83 |   37   18   32 |   28   15   52 |
gfz | gfz 1098 |   38   28   93 |   56   18   83 |   24   15   46 |
igr | igr 2076 |   50   28   91 |   34   16   41 |   26   12   47 |
igs | igs 2400 |   44   27   87 |   42   16   51 |   21   11   44 |
jpl | jpl 2400 |   44   27   90 |   45   13   56 |   22   12   41 |

Table 5.0897.2   GPS week: 0897   Day: 2   MJD: 50525.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   40   28   92 |    0    0    0 |   24   12   44 |
emr | emr 2392 |   41   30   93 |    0    0    0 |   25   12   44 |
esa | esa 2163 |   43   32   96 |    0    0    0 |   33   17   51 |
gfz | gfz 1097 |   36   31   99 |    0    0    0 |   24   14   35 |
igr | igr 2352 |   40   28   92 |    0    0    0 |   24   12   44 |
igs | igs 2399 |   40   30   92 |    0    0    0 |   26   11   43 |
jpl | jpl 2398 |   41   30   92 |    0    0    0 |   26   12   44 |

Table 5.0897.3   GPS week: 0897   Day: 3   MJD: 50526.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   48   26   77 |    0    0    0 |   20   11   49 |
emr | emr 2387 |   47   26   75 |    0    0    0 |   20   10   49 |
esa | esa 2101 |   51   28   78 |    0    0    0 |   28   18   61 |
gfz | gfz 1174 |   40   27   85 |    0    0    0 |   21   16   60 |
igr | igr 2392 |   50   28   75 |    0    0    0 |   20   11   51 |
igs | igs 2400 |   49   26   75 |    0    0    0 |   21   11   51 |
jpl | jpl 2400 |   49   26   76 |    0    0    0 |   21   10   51 |

Table 5.0897.4   GPS week: 0897   Day: 4   MJD: 50527.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   42   30   84 |   41   26   57 |   27   12   39 |
emr | emr 2387 |   40   28   83 |   40   25   57 |   28   14   40 |
esa | esa 2021 |   44   33   95 |   46   30   62 |   35   13   43 |
gfz | gfz 1197 |   45   32   88 |   49   33   64 |   36   16   44 |
igr | igr 2391 |   41   28   87 |   41   27   57 |   28   12   40 |
igs | igs 2399 |   42   28   84 |   40   26   57 |   28   13   40 |
jpl | jpl 2399 |   41   28   85 |   40   26   59 |   27   13   40 |

Table 5.0897.5   GPS week: 0897   Day: 5   MJD: 50528.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2399 |   46   25  109 |   35   27   57 |   23   15   44 |
emr | emr 2269 |   48   27  119 |   36   28   53 |   25   15   47 |
esa | esa 1978 |   62   30  118 |   39   28   61 |   30   16   53 |
gfz | gfz 1151 |   54   28  150 |   40   34   51 |   28   19   56 |
igr | igr 2396 |   47   25  107 |   35   28   62 |   24   14   49 |
igs | igs 2399 |   47   26  106 |   34   27   57 |   24   14   45 |
jpl | jpl 2399 |   46   26  109 |   34   28   56 |   23   13   45 |

Table 5.0897.6   GPS week: 0897   Day: 6   MJD: 50529.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2400 |   50   28   86 |   32   24   46 |   23   13   37 |
emr | emr 2378 |   47   28   85 |   32   24   45 |   23   15   38 |
esa | esa 1972 |   53   31   82 |   44   28   60 |   28   15   48 |
gfz | gfz 1149 |   50   28   73 |   28   30   48 |   25   22   42 |
igr | igr 2396 |   49   28   83 |   36   26   49 |   21   13   39 |
igs | igs 2400 |   49   28   81 |   33   25   47 |   22   13   37 |
jpl | jpl 2398 |   49   28   85 |   33   25   48 |   22   13   36 |


[Mailed From: Yves Mireault <mireault at geod.emr.ca>]



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