Subject: [IGSREPORT-4546] Wk 0940 IGS Final Orbits
From: AC Coordinator / NRCan GSDivision
Date: Thu, 29 Jan 1998 4:48:25 PST

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IGS Electronic Report    Thu Jan 29  4:48:25 PST 1998      Message Number 4546
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0940 IGS Final Orbits

Final IGS Orbit Combination - Week 0940   (Jan 11, 1998 - Jan 17, 1998)

Contacts: J. Kouba ([email-masked])
          Y. Mireault ([email-masked])

COMBINATION STRATEGY:

  Starting with GPS week 860, the IGS Final orbit combination is done directly
in the ITRF without any alignment to the Bulletin B EOP series.

  Each centre satellite clock corrections are first transformed to a common 
reference. One of the following two methods can be used (the REMARKS section of
this report gives which method is used):
[1] For each centre, a clock offset and a drift are estimated with respect to
    the broadcast clock corrections using only non-SA satellites;
[2] A chosen reference centre is aligned to the broadcast clock corrections
    using all satellites. All other centres are then aligned to that reference
    centre. 
The offsets and drifts are used to align each centre satellite clock
corrections to GPS time. Ephemerides and clock corrections are then combined
as weighted averages computed over all centres. Each centre is given a
position weight and a clock weight. The position weights are computed from
each centre's absolute deviation to the unweighted average orbit after the
estimation of a 7-parameter Helmert transformation. The clock weights are
either computed from [1] the absolute deviation of the initial alignment to
broadcast clock for the non-SA satellites, or [2] from the absolute deviation
of centre's aligned clock corrections with respect to the unweighted mean.
Finally, a 7-parameter Helmert transformation and clock offset and drift are
estimated for each centre with respect to the combined solutions and parameters
and RMS of fit reported. All the above estimations are performed using the
L1-norm robust scheme.

  Each centre ephemerides are also evaluated individually and independently from
the orbit combination by using week long arcs. The Earth Orientation Parameters
(EOP) used in this evaluation are those submitted by the respective centres.
The IGS combined orbits/clocks and all centres providing both orbit and clock 
solutions are further evaluated by an independent point positioning (navigation)
program developed at NRCan. This is primarily intended for testing clock 
solution precision as well as the orbit/clock consistency.

  Like the clock solutions broadcast in the navigation message, the combined
satellite clocks are corrected for the periodical relativistic correction (see
e.g. GPS interface Control document ICD-GPS-200, p.73):

                              -2*(X.V)/c,

where X and V are the inertial sv state and velocity vectors and c is the speed
of light. Also for compatibility, no satellite L1/L2 delay calibration should be
applied.

SOFTWARE:

  The weighted average software used was originally developed by T. Springer
and G. Beutler in 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 G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS 
   Analysis Centers, Bulletin Geodesique, 69, pp 200-222.

   Kouba J., Mireault Y. and F. 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.

   Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report, 
   International GPS Service for Geodynamics (IGS) 1995 Annual Report, 
   pp. 45-76.

   Kouba J. and Y. Mireault, 1997, Analysis Coordinator Report, 
   International GPS Service for Geodynamics (IGS) 1996 Annual Report, 
   pp. 55-100.

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.

  Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
Final IGS solutions.  AC LOD biases with respect to Bulletin A are estimated
using Bulletin A most recent 3 weeks (21 days), i.e. up to 5 days prior to
the last non-predicted day 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 integrated into IGS UT1-UTC. The starting UT1-UTC value is chosen as
Bulletin A fifth day prior to its last non-predicted day. Both IGS LOD and 
UT1-UTC values are printed in the IGS Final erp file.

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

 IGS09400-6.SP3  IGS GPS ephemeris files for days 0-6, week 0940 in SP3 format.
 IGS09407.ERP    Earth Rotation Parameters (ERP) and their rates as well as
                 Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                 with IGS ephemerides.
 IGS09407.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 satellites:

         Day | PRN list | Ref. Centre 
        -----+----------+-----------------
         0-6 |    All   |    COD  (see note below)

     Note: A chosen reference centre is aligned to the broadcast GPS clocks
           using all satellites; all other centres are then aligned to that
           reference centre. The clock weights are computed from the absolute
           deviation of centre's aligned clock corrections with respect to the
           unweighted mean.

6. The following 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.

                  Day | Centre | PRN list
                  ----+--------+---------------
                   1  |  NGS   |  ALL

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
         ------------+----------+-------+----------+-------------------
          3 (Jan 14) | 00:00:00 |  14   |   All    | Modeling problems (a)
          3 (Jan 14) | 00:00:00 |  17   |   All    | Modeling problems
          4 (Jan 15) | 00:00:00 |  23   |   All    | Modeling problems
          5 (Jan 16) | 00:00:00 |  24   |   All    | Modeling problems (b)
          6 (Jan 17) | 00:00:00 |  16   |   All    | Modeling problems

   (a) Satellites PRN14 was excluded from long arc evaluation on days 2,3 and 6
       for all centres due to unrealistic RMS.

   (b) Satellites PRN24 was excluded from long arc evaluation on day 4
       for all centres due to unrealistic RMS.

8. PRN13 was included in this week's Final combination although its status is 
   still UNHEALTHY. Users are reminded to use it with extreme caution.
   PRN13 was launched on Jul 23 1997 (wk 0915 day 3) at 03:43 UT.  It resides
   in slot F-5 (ref. NANU 088-97206).  A Follow up NANU will be sent once the
   navigation payload on PRN13 is usable.

9. A new clock combination strategy was implemented starting this week (wk 938).
   It is based on radial orbit differences of the AC orbit solutions with 
   respect to the IGS combined orbits. The algorithm generally gives better 
   clock combination RMS and more importantly, gives a better igs orbit/clock 
   consistency.

ORBIT COMBINATION AND EVALUATION STATISTICS:

  Most combination statistics are with respect to the combined orbits and
consist of five parts. The first, Table 1, summarizes all statistics for the
week. It contains means and standard deviations over the week of satellite
ephemeris and clock correction transformation parameters for each centre
(table 1.0940.a). It also displays the computed satellite position sigmas for
the combined orbits (table 1.0940.b). The second part, Table 2, contains the
complete ephemeris and clock correction transformation parameters (includes
both the apriori and a posteriori values) for each centre and each day
(tables 2.0940.0-6). The third part, Table 3, contains two types of daily RMS
for each satellite and centre, along with the computed satellite position 
sigmas for the combined orbits (tables 3.0940.0-6). The first type of
satellite RMS is based on orbit combination and the second RMS type is a result
of the 7-day arc evaluation of each centre ephemerides. The fourth part, 
Table 4, is a weekly summary of the daily precise navigation summaries for
centres providing both orbit and clock solutions.  It contains weekly station
RMS w.r.t. the initial coordinates for the Latitude, Longitude and Height 
components for up to three IGS stations (table 4.0940). The fifth and final
part, Table 5, is similar to Table 4 and contains daily precise navigation
statistics (tables 5.0940.0-6).

  In tables 1-3, the most important statistic which is meaningful for intra
centre/satellite analysis is labeled WRMS. It is a weighted RMS where
normalized weights are based on accuracy codes given in the SP3 files, and
should not be affected by downweighted/problem satellites when acknowledged by
individual centres in their SP3 file.

Table 1: Week 0940 summary.                       (Jan 11, 1998 - Jan 17, 1998)

Table 1.0940.a   GPS week: 0940   MJD: 50824.0-50830.0

         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  90 | .00  .01 -.01  -.28   .06   .37  -.2  .05  .04 |    3.3   -5.8     .3
        | .00  .00  .00   .05   .09   .11   .1           |    4.3    7.9
emr  29 | .01 -.01 -.01   .29  -.20   .63  -.1  .10  .10 | 5912.3   95.4     .3
        | .00  .01  .01   .12   .11   .12   .2           |  210.0    4.9
esa  51 | .00  .00  .01   .32  -.16   .17   .2  .08  .07 |    3.0  -72.6    1.8
        | .01  .00  .01   .16   .15   .14   .1           |   17.7   14.0
gfz  59 | .00  .00  .01  -.20   .19  -.33  -.1  .05  .05 |    2.5   -5.2     .4
        | .00  .00  .00   .05   .03   .09   .0           |    3.5    6.3
igr  n/a| .00 -.02  .00   .26   .12  -.02  -.1  .06  .05 |    1.1   -1.7     .4
        | .00  .01  .01   .18   .21   .28   .0           |    2.8    4.7
jpl  37 | .00  .01 -.01   .06  -.22  -.09   .2  .05  .05 |  136.0     .0     .1
        | .00  .00  .00   .06   .04   .08   .1           |  162.7    8.9
ngs  54 |-.01 -.05  .00   .52   .44   .38  -.2  .18  .17 |    2.2   -3.6   79.8
        | .00  .01  .01   .41   .23   .14   .1           |    5.6    8.9
sio  106| .00  .00  .00   .07   .14  -.50   .0  .08  .08 |     .0     .0     .0
        | .00  .00  .01   .05   .05   .13   .3           |     .0     .0

Table 1.0940.b   GPS week : 0940   MJD: 50824.0-50830.0

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

              Day of GPS week
 PRN  |   0   1   2   3   4   5   6 |  Remarks
------|-----------------------------|------------------------------------------
   1  |   3   2   3   3   3   3   3 |
   2  |   2   2   2   2   2   2   2 |
   3E |   3   2   3   3   3   3   3 |
   4  |   2   2   2   3   3   2   2 |
   5  |   2   2   2   2   2   2   2 |
   6E |   2   3   3   3   3   3   3 |
   7E |   3   2   3   3   3   3   4 |
   8  |   4   4   4   4   4   4   4 |
   9  |   2   2   2   2   2   2   2 |
  10E |   3   3   3   3   4   3   3 |
  13  |   4   5   4   4   4   4   4 |
  14E |   4   3   3  17   3   3   3 | Modeling problems on day 3.
  15  |   2   2   2   3   2   3   3 |
  16E |   4   3   4   3   4   4   3 |
  17  |   2   3   4   3   3   3   3 |
  18  |   3   2   3   3   2   3   2 |
  19  |   3   3   3   2   2   3   2 |
  21E |   3   2   6   4   3   3   3 |
  22  |   3   2   2   3   2   3   3 |
  23E |   3   3   4   4   4   4   4 |
  24  |   2   2   3   2  17   3   3 | Modeling problems on day 4.
  25  |   2   2   3   3   2   3   2 |
  26  |   2   2   3   2   3   3   2 |
  27  |   2   2   2   2   2   2   2 |
  29  |   2   2   2   2   2   2   3 |
  30  |   2   2   2   2   3   2   2 |
  31E |   3   3   3   3   3   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 2.0940.0   GPS week: 0940   Day: 0   MJD: 50824.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  90 | .00  .01 -.01  -.30  -.04   .38  -.3  .05  .04 |   -4.0    6.7     .3
emr  29 | .01 -.01 -.02   .22  -.18   .59   .1  .09  .09 | 5619.0  102.3     .2
esa  53 | .00  .01  .02   .33  -.10   .24   .2  .08  .07 |  -23.8  -54.5    1.3
gfz  60 | .01  .00  .01  -.23   .22  -.35  -.2  .05  .05 |   -1.5    4.9     .3
igr  n/a| .00 -.01  .00   .19  -.06  -.14  -.1  .05  .05 |    -.5     .7     .4
jpl  37 | .00  .01 -.01   .05  -.20  -.05   .3  .04  .04 |   91.2   15.5     .1
ngs  55 | .00 -.05  .00   .85   .31   .32  -.2  .17  .18 |     .3    1.5   78.4
sio  108| .00  .01  .01  -.01   .12  -.38   .2  .06  .06 |     .0     .0     .0

Table 2.0940.1   GPS week: 0940   Day: 1   MJD: 50825.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  89 | .00  .00 -.01  -.34   .13   .30  -.3  .04  .03 |    3.3   -6.2     .3
emr  29 | .01 -.01 -.01   .23  -.17   .64  -.1  .10  .10 | 5722.1   88.5     .2
esa  51 |-.01  .00  .02   .37  -.12   .16   .2  .07  .07 |    8.7  -59.7    1.2
gfz  59 | .01 -.01  .01  -.24   .24  -.44  -.2  .06  .06 |    4.6   -6.6     .4
igr  n/a| .00 -.02  .00   .28   .02   .36  -.1  .05  .05 |   -1.4    2.3     .5
jpl  37 | .00  .00 -.01   .17  -.21  -.03   .3  .03  .03 |  236.9   -6.8     .1
ngs  54 |-.01 -.04 -.01  1.15   .45   .20  -.4  .18  .18 |   14.5  -23.2   80.5
sio  103| .00  .00  .01   .06   .17  -.38   .1  .07  .07 |     .0     .0     .0

Table 2.0940.2   GPS week: 0940   Day: 2   MJD: 50826.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  91 | .00  .01 -.01  -.21   .12   .51  -.3  .05  .04 |    3.3    -.9     .2
emr  28 | .01  .00 -.01   .34  -.29   .50  -.4  .11  .11 | 5811.1   98.7     .3
esa  51 |-.01  .00  .01   .20   .10   .19   .1  .09  .08 |     .3  -77.6    1.9
gfz  58 | .00 -.01  .01  -.27   .19  -.41  -.2  .05  .05 |    1.3   -2.4     .4
igr  n/a| .00 -.01  .00   .10   .09  -.36  -.1  .05  .04 |     .7   -1.4     .3
jpl  37 | .00  .01  .00   .11  -.28  -.19   .2  .04  .04 | -205.9   -3.7     .2
ngs  52 | .00 -.05 -.01   .70   .16   .39  -.3  .18  .18 |    2.0     .5   78.5
sio  110| .00  .00  .00   .07   .10  -.47   .4  .11  .08 |     .0     .0     .0

Table 2.0940.3   GPS week: 0940   Day: 3   MJD: 50827.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  93 | .00  .01 -.01  -.30  -.09   .41  -.3  .07  .04 |    9.8  -13.6     .3
emr  31 | .00 -.01 -.01   .54  -.04   .60   .2  .12  .12 | 5913.9   93.1     .3
esa  52 |-.01  .00  .01   .12  -.13  -.01   .0  .07  .07 |   -7.5  -73.3    1.0
gfz  59 | .01  .00  .01  -.19   .16  -.25  -.1  .05  .05 |    8.7  -15.3     .4
igr  n/a| .00 -.01  .00   .34   .04   .16  -.1  .07  .04 |    7.2  -11.8     .3
jpl  37 | .00  .01  .00   .05  -.25   .01   .2  .06  .06 |  238.0   -6.6     .1
ngs  53 |-.01 -.04  .00   .35   .81   .64   .0  .20  .19 |    1.0     .5   86.0
sio  107| .00  .00  .00   .11   .09  -.48   .2  .06  .06 |     .0     .0     .0

Table 2.0940.4   GPS week: 0940   Day: 4   MJD: 50828.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  93 | .01  .01 -.01  -.21   .06   .37  -.2  .07  .04 |    5.4  -14.9     .3
emr  29 | .00 -.02 -.01   .19  -.12   .88   .0  .10  .10 | 6009.0   98.2     .3
esa  52 |-.01  .01  .01   .20  -.31   .00   .3  .07  .06 |   30.3  -64.0    2.5
gfz  59 | .00  .00  .01  -.20   .19  -.20  -.1  .05  .05 |    3.3   -6.7     .3
igr  n/a| .00 -.02  .00   .07   .21  -.02  -.1  .08  .06 |    1.1   -2.1     .4
jpl  37 | .00  .01 -.01   .04  -.22  -.09   .2  .08  .08 |  124.7    8.9     .1
ngs  55 |-.01 -.07  .02   .17   .66   .37   .0  .19  .17 |     .8    1.7   77.6
sio  106| .00 -.01  .00   .03   .23  -.64  -.2  .08  .06 |     .0     .0     .0

Table 2.0940.5   GPS week: 0940   Day: 5   MJD: 50829.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  90 | .00  .01 -.01  -.34   .09   .18  -.1  .04  .04 |     .7    -.6     .3
emr  30 | .01 -.01  .00   .24  -.26   .59  -.2  .10  .10 | 6109.0   90.7     .3
esa  52 | .00  .01  .00   .55  -.30   .38   .3  .08  .08 |   -4.6  -89.2    2.1
gfz  59 | .00  .00  .01  -.20   .20  -.34  -.1  .05  .05 |    -.7   -1.9     .3
igr  n/a| .01 -.02  .00   .22  -.02   .20  -.1  .05  .05 |     .3     .4     .3
jpl  37 | .00  .01  .00  -.01  -.22  -.12   .1  .05  .05 |  236.0   -7.0     .2
ngs  55 |-.01 -.05  .01   .42   .26   .29  -.2  .15  .14 |   -2.5   -4.5   78.3
sio  105| .00 -.01 -.01   .11   .14  -.40  -.3  .11  .11 |     .0     .0     .0

Table 2.0940.6   GPS week: 0940   Day: 6   MJD: 50830.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cod  86 | .00  .01  .00  -.28   .16   .45  -.1  .05  .03 |    4.8  -11.0     .3
emr  28 | .01 -.01 -.01   .29  -.36   .64  -.2  .10  .10 | 6202.1   96.1     .2
esa  48 | .01  .00  .02   .51  -.29   .22   .1  .08  .07 |   17.8  -90.1    1.8
gfz  56 | .00  .00  .01  -.11   .15  -.34  -.1  .05  .05 |    1.8   -8.7     .3
igr  n/a| .01 -.01 -.02   .59   .56  -.33  -.1  .06  .05 |     .2    -.3     .4
jpl  37 | .00  .01 -.01   .01  -.17  -.18   .3  .04  .04 |  231.5    -.5     .1
ngs  54 | .00 -.05 -.01  -.02   .45   .45  -.3  .17  .15 |    -.8   -1.5   78.9
sio  103| .00  .00 -.01   .14   .13  -.72  -.5  .08  .08 |     .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 3.0940.0   GPS week: 0940   Day: 0   MJD: 50824.0

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

Table 3.0940.1   GPS week: 0940   Day: 1   MJD: 50825.0

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

Table 3.0940.2   GPS week: 0940   Day: 2   MJD: 50826.0

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

Table 3.0940.3   GPS week: 0940   Day: 3   MJD: 50827.0

               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  15   4   4   3   4  23   6    3 |    4  12   5   4   6   5  17   9    4
   2  |   3   8   5   4   3   3  18   8    2 |    8  10   7   8   6   7  18   8    7
   3E |   4  10   6   4   4   3  26   7    3 |    3   8   6   5   6   5  19  10    3
   4  |   3  14   6   4   5   3  15   5    3 |    5  14   6   3   7   3  15   6    4
   5  |   2   9   5   5   4   3   8   5    2 |    4   9   5   5   6   4  11   7    3
   6E |   4  15   8   4   6   5  16   6    3 |    6  12   6   7   6   8  15   8    6
   7E |   4  12   5   6   4   3  23   5    3 |    5  17   8   7  10   7  27   9    7
   8  |  11   9   8   8   5 ---  10   5    4 |    9   8   7   7   5 ---  11   6    4
   9  |   3   7   4   5   3   3  11   5    2 |    7   8   7   6   6   5  11   7    5
  10E |   4  13  12   4   9   7  12   6    3 |    6  12   9   7  11   7  15   6    6
  13  |   7 ---   9   5  10 ---  15  11    4 |    4 ---   8   5  11 ---  11   9    5
  14E |  21 --- --- ---  28  21  43 ---   17 |    0 --- --- ---   0   0   0 ---  ---
  15  |   8  10  10   4   5   3  17   6    3 |    7  12  12   5   6   4  15   6    4
  16E |   4  15  10   7   6   4  17   9    3 |    9  16  10   8  10   8  20   8    8
  17  |   6  10   7   5   6   5  14   4    3 |    3  11   6   5   6   3  12   4    3
  18  |   4  15   6   8   5   4  16   7    3 |    7  14   8   6   8   6  13   8    5
  19  |   5  12   6   4   3   4  11   4    2 |    9  14  14   8   8   9  10  12    9
  21E |   7  15  12   8   5   4  28   6    4 |    6  12  10   8   9   6  23  12    7
  22  |   2  11   8   7   3   2  14   5    3 |    4   8   7   4   6   4  13   7    3
  23E |  13  11  12   7   3   5  30   6    4 |   14  20   8  15  14  14  23  14   13
  24  |   3  12   7   5   4   3  11   5    2 |    3   9   6   5   6   2  10   5    3
  25  |   5   8   4   6   3   4  21   5    3 |    4   8   7   6   6   5  19   9    5
  26  |   2  12   4   2   4   3  14   6    2 |    4   9   5   4   6   4  14   8    3
  27  |   3  10   4   5   4   3   8   3    2 |    4   9   4   6   5   4   9   6    4
  29  |   4   8   4   3   4   3  19   5    2 |    3   9   5   4   5   4  21   4    3
  30  |   4  14   6   4   3   3  13   4    2 |    5  11   5   4   5   4  13   6    4
  31E |   4   7   6   7   4   4  30   7    3 |    6   8   9   8   7   7  32   9    6
------|--------------------------------------|--------------------------------------
 RMS  |   7  12   7   5   7   6  20   6      |T   6  11   7   6   7   6  16   8    5
 WRMS |   4  12   7   5   4   6  19   6      |NE  5  10   7   5   6   4  13   7    4
 MEDI |   4  11   6   5   4   3  16   6      |MD  5  11   7   6   6   5  15   8    5

Table 3.0940.4   GPS week: 0940   Day: 4   MJD: 50828.0

               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  |   3  10   9   3   4   4  23   9    3 |    2  11   5   3   6   3  19   9    3
   2  |   5   6   7   4   6   3  12   6    2 |    7  10   8   5   7   6  18   7    6
   3E |   4  11   6   3   6   4  23   6    3 |    3  10   5   5   7   3  22   5    3
   4  |   4  10   8   4   5   4  26   7    3 |    4  11   7   4   7   4  27   6    4
   5  |   2   8   5   5   4   3   7   9    2 |    4  11   5   4   7   4  15  10    4
   6E |   4  15   4   4   5   4  16   7    3 |    5  13   9   6  10   5  22   8    6
   7E |   4   9   7   3   7   4  25   5    3 |    4  11   8   5  10   5  27   8    5
   8  |  10   9   8   8   5 ---  11   6    4 |    7   8   7   5   6 ---  14   8    4
   9  |   3   6   7   5   6   3  10   5    2 |    7  10   6   6   7   7  13  11    6
  10E |   5  12  10   8   8   8  21   7    4 |    6  16  13   7  13   6  23   6    7
  13  |   6 ---   9   6  15 ---  16  11    4 |    5 ---   9   9  19 ---  17  10    7
  14E |   4  12   6   5   6   4  18   6    3 |    7   9   8   6   8   6  15   5    5
  15  |   4   8   5   4   5   3  14   6    2 |    4   8   5   4   5   4  18   5    3
  16E |   4  17   6  10   7   4  15  11    4 |    8  13   6   6  10   9  18   8    7
  17  |   7  12   6   6   6   4  12   4    3 |    4  11   5   4   7   3  14   4    3
  18  |   3  12   4   7   6   3   9   6    2 |    5  12   6   6   8   6  18   5    4
  19  |   4   7   6   4   5   4  11   7    2 |    5   8   8   5   5   5  16   7    5
  21E |   6  11   9   6   6   3  15   6    3 |    6  12  12   6   9   6  21  11    7
  22  |   2  10   6   5   6   3  18   5    2 |    4  10   4   4   7   3  20   4    4
  23E |   6  11   9   5  10   5  35   9    4 |    5  13  10   7  11   6  21   8    5
  24  |  26 --- --- ---  22  36  39  17   17 |    0 --- --- ---   0   0   0   0  ---
  25  |   4   5   6   5   5   4  12   5    2 |    4   5   7   6   7   3  14   8    5
  26  |   4  15   4   3   4   4  12   7    3 |    4  11   4   4   5   5  11   7    3
  27  |   3   7   4   5   4   3   7   6    2 |    3   8   4   5   4   4  14   5    3
  29  |   4   6   5   3   4   3  11   6    2 |    4   8   3   5   6   3  14   7    3
  30  |   4  11   5   4   4   4  15   9    3 |    5   8   5   3   7   4  16  10    4
  31E |   4  12   7   6   4   5  22   5    3 |    7  13   8  10   9   7  20  10    7
------|--------------------------------------|--------------------------------------
 RMS  |   7  10   7   5   8   8  19   8      |T   5  10   7   5   8   5  18   7    4
 WRMS |   4  10   6   5   6   8  17   6      |NE  4   9   5   5   7   4  16   7    4
 MEDI |   4  10   6   5   6   4  15   6      |MD  5  11   7   5   7   5  18   8    5

Table 3.0940.5   GPS week: 0940   Day: 5   MJD: 50829.0

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

Table 3.0940.6   GPS week: 0940   Day: 6   MJD: 50830.0

               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  |   3  12   4   6   4   4  19  11    3 |    3   9   4   4   5   4  19  10    3
   2  |   2   9   3   3   4   3  10   9    2 |    7  10   7   6   8   8  20  11    6
   3E |   3   8  10   3   7   3  25   9    3 |    3   7   4   5   8   5  21  10    4
   4  |   3   9   7   3   5   3  13   7    2 |    4   8   7   5   7   4  20   7    3
   5  |   2   9   7   3   3   3  15   8    2 |    5   9   4   4   6   4  16  11    4
   6E |   4  17   9   5   5   5  15   8    3 |    7  15   9   8  11   8  27  13    7
   7E |   4  10  12   3   7   6  34   8    4 |    7  13   8   8   9   8  27  13    7
   8  |   9   9   8   6   4 ---  13   7    4 |    8   9   6   6   4 ---  18   8    4
   9  |   2   9   4   3   4   2   6   7    2 |    8  10   7   7   6   7  16  10    6
  10E |   4  10  10   7   7   7  14   7    3 |    7  12  10   8  12   9  19   9    7
  13  |   6 ---   9   5   8 ---  17 ---    4 |    3 ---  11   7  10 ---  17 ---    5
  14E |   3  10 ---   6  11   4  21   7    3 |    0   0 ---   0   0   0   0   0  ---
  15  |   3  10  11   5   3   3  13   7    3 |    4   9   6   6   6   5  18   5    4
  16E |   3  15 ---   7  10   3  17   8    3 |    2   3 ---   2   2   2   4   2    2
  17  |   5   9   9   5   4   6  12   7    3 |    4   8   4   5   5   3  15   8    3
  18  |   3   9   7   3   5   4  12   6    2 |   10   9   6   7   9   9  21  12    7
  19  |   4  11  10   3   5   3  10   6    2 |    6  10  11   9  10   9  19  11    8
  21E |   4   9   5   6   3   3  15   9    3 |    8  14   9  10  11   9  26  13    9
  22  |   3   9   6   4   5   3  17  11    3 |    4   6   6   5   6   4  21   8    4
  23E |  14  11  11   4   8   5  21  10    4 |   14  18  18  14  12  14  22  17   14
  24  |   4   9   9   7   5   3  13   8    3 |    5   8   6   6   6   4   8   7    5
  25  |   3   8   7   5   4   3  12   5    2 |    5   8   4   6   7   5  15   9    5
  26  |   3   9   4   4   4   3  13   9    2 |    5   9   4   5   4   6  19  10    3
  27  |   4   9   9   3   3   3   9   6    2 |    3   9   8   5   6   6  18   9    5
  29  |   3   8   8   4   5   2  21  10    3 |    3   7   5   4   3   3  21  10    2
  30  |   4  10   6   2   5   2   8   8    2 |    5   7   4   4   5   4  18   9    3
  31E |   4   8   6   7   6   2  22  13    3 |   11  12  11  12  13  13  25  15   11
------|--------------------------------------|--------------------------------------
 RMS  |   5  10   8   5   6   4  17   8      |T   6  10   7   6   7   7  19  10    6
 WRMS |   3  10   7   5   5   4  15   8      |NE  5   8   6   5   6   5  17   9    4
 MEDI |   3   9   8   4   5   3  14   8      |MD  5   9   6   6   7   6  19  10    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 4.0940   GPS week: 0940   MJD: 50824.0-50830.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2589 |U  40   28   79 |U  41   34   97 |   27   15   43 |
emr | emr 2463 |   42   25   80 |   42   35   98 |U  26   16   44 |
esa | esa 2319 |   41   30   78 |U  52   41  112 |   31   21   54 |
gfz | gfz 1259 |   45   26   83 |U  53   38  102 |   30   19   49 |
igr | igr 2576 |   44   28   83 |   49   38   99 |   26   17   45 |
igs | igs 2590 |   41   27   81 |   43   34   97 |   26   15   43 |
jpl | jpl 2363 |U  43   28   78 |U  43   32   95 |   27   15   48 |

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 5.0940.0   GPS week: 0940   Day: 0   MJD: 50824.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2591 |   53   25   68 |   34   25   88 |   23   16   37 |
emr | emr 2490 |   54   24   70 |   33   26   86 |   22   18   38 |
esa | esa 2362 |   54   27   68 |   45   32   86 |   27   20   45 |
gfz | gfz 1274 |   63   26   71 |   40   28  109 |   26   18   47 |
igr | igr 2591 |   56   25   74 |   52   34   90 |   23   18   38 |
igs | igs 2592 |   54   25   69 |   37   25   90 |   23   17   38 |
jpl | jpl 2364 |   53   27   66 |   33   25   86 |   25   17   42 |

Table 5.0940.1   GPS week: 0940   Day: 1   MJD: 50825.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2580 |   45   26   76 |   33   31   72 |   32   15   56 |
emr | emr 2483 |   44   24   78 |   35   34   75 |   32   18   56 |
esa | esa 2289 |   43   28   74 |   37   34   82 |   33   18   68 |
gfz | gfz 1264 |   53   25   77 |   33   24   68 |   35   19   56 |
igr | igr 2573 |   57   26   77 |   39   34   81 |   33   22   57 |
igs | igs 2580 |   44   24   78 |   34   31   75 |   33   16   56 |
jpl | jpl 2351 |   44   24   73 |   34   27   67 |   35   17   57 |

Table 5.0940.2   GPS week: 0940   Day: 2   MJD: 50826.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2592 |   33   28   79 |   43   28   88 |   23   12   42 |
emr | emr 2489 |   33   27   80 |   45   31   87 |   23   14   43 |
esa | esa 2318 |   35   32   78 |   45   32  100 |   28   15   51 |
gfz | gfz 1274 |   37   27   78 |   59   34   75 |   28   17   55 |
igr | igr 2542 |   35   27   82 |   47   31   91 |   23   16   43 |
igs | igs 2592 |   33   27   80 |   44   30   88 |   23   13   43 |
jpl | jpl 2364 |   34   28   74 |   47   30   82 |   26   15   48 |

Table 5.0940.3   GPS week: 0940   Day: 3   MJD: 50827.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2592 |   34   27   79 |   47   32  104 |   27   14   40 |
emr | emr 2396 |   36   25   75 |   54   33  111 |   28   16   39 |
esa | esa 2414 |   35   25   71 |   56   35  122 |   34   21   51 |
gfz | gfz 1229 |   36   31   77 |   60   32  112 |   36   18   50 |
igr | igr 2565 |   35   26   81 |   49   33  104 |   26   15   42 |
igs | igs 2592 |   35   27   79 |   47   32  104 |   26   14   41 |
jpl | jpl 2364 |   37   26   73 |   53   33   98 |   26   14   49 |

Table 5.0940.4   GPS week: 0940   Day: 4   MJD: 50828.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2588 |   38   31   86 |   46   28   95 |   30   15   48 |
emr | emr 2398 |   40   24   89 |   48   32   98 |   26   14   49 |
esa | esa 2423 |   37   30   89 |   64   42  103 |   30   24   52 |
gfz | gfz 1227 |   54   25  102 |   70   49  126 |   24   17   45 |
igr | igr 2587 |   38   32   90 |   62   37  100 |   28   15   50 |
igs | igs 2590 |   38   30   88 |   52   32   95 |   28   15   48 |
jpl | jpl 2364 |   39   31   87 |   42   32   95 |   28   14   54 |

Table 5.0940.5   GPS week: 0940   Day: 5   MJD: 50829.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2591 |   38   30   80 |   43   37   92 |   26   16   35 |
emr | emr 2495 |   41   28   82 |   41   37   88 |   25   14   37 |
esa | esa 2210 |   37   33   78 |   55   43  112 |   26   25   55 |
gfz | gfz 1277 |   34   25   82 |   56   46  104 |   30   21   40 |
igr | igr 2589 |   40   31   85 |   48   41   92 |   23   15   37 |
igs | igs 2592 |   39   30   82 |   46   38   91 |   25   16   35 |
jpl | jpl 2363 |   44   32   79 |   48   33   91 |   24   15   41 |

Table 5.0940.6   GPS week: 0940   Day: 6   MJD: 50830.0

CENT| CLK EPO  |      BRUS      |      USUD      |      WILL      |
----|----------|----------------|----------------|----------------|
cod | cod 2589 |   37   26   84 |   37   48  131 |   25   16   36 |
emr | emr 2488 |   40   25   86 |   35   50  128 |   25   15   41 |
esa | esa 2214 |   45   32   84 |   59   59  157 |   39   25   51 |
gfz | gfz 1266 |   28   25   90 |   45   42  105 |   28   21   49 |
igr | igr 2584 |   39   27   89 |   46   51  129 |   24   17   41 |
igs | igs 2590 |   38   26   87 |   38   48  129 |   25   16   38 |
jpl | jpl 2370 |   46   27   88 |   41   42  131 |   26   15   41 |

Table 6: Earth Orientation Parameters weekly summary.                          
                                                                               
         Weekly mean and standard deviation of Centre ERP, ERP rates and       
         LOD differences with respect to IGS combined values. See Table 7 for  
         the daily summaries.                                                  
                                                                               
         Xpole,Xrt: x pole and x pole rate (10**-5")                           
         Ypole,Yrt: y pole and y pole rate (10**-5"/day)                       
         LOD: Length Of Day (us)                                               
                                                                               
         AC LOD BIAS: 21-day mean LOD bias with respect to Bulletin A (us)     
         AC LOD BIAS RMS: RMS of AC LOD BIAS (us)                              
                                                                               
         FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
               for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 6.0940   GPS week: 0940   MJD: 50824.5-50830.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |     -7     32      2      7     -5 |     -10     16
            |      9      5      9      9      7 |       1
emr   uuuuu |     23    -31     23    -23     30 |     -17     47
            |     13     13     41     49     33 |       7
esa   uuuuu |     13    -45    -49    -73      7 |      15     32
            |     19     16     25     34     12 |       2
gfz   uuuuu |    -15     21     21     25    -12 |       7     28
            |      3      6     11     14     14 |       2
igr   xxxxx |    -14    -26    -18    -34      2 |       1     22
            |     20     20     31     17     14 |       2
jpl   uuuuu |     24     -5     -4     31    -10 |     -31     45
            |      4      7     12      9     26 |       1
ngs   uuuuu |    -68    -61     -1   -154     19 |     -15     55
            |     26     24     44     98     49 |       6
sio   uuuuu |    -26     -1      0     13     39 |      -1     45
            |     13     11      9     11     42 |       6
                                                                               
Table 7: Earth Orientation Parameters daily summary.                           
                                                                               
         Daily Centre ERP, ERP Rates and LOD differences with respect to       
         IGS combined values.                                                  
                                                                               
         Xpole,Xrt: x pole and x pole rate (10**-5")                           
         Ypole,Yrt: y pole and y pole rate (10**-5"/day)                       
         LOD: Length Of Day (us)                                               
                                                                               
         AC LOD BIAS: 21-day mean LOD bias with respect to Bulletin A (us)     
         AC LOD BIAS RMS: RMS of AC LOD BIAS (us)                              
                                                                               
         FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
               for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 7.0940.0   GPS week: 0940   Day: 0   MJD: 50824.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |      8     35      9      6     -7 |      -8     13
emr   uuuuu |     17    -27    -48    -40     45 |     -26     52
esa   uuuuu |      0    -45    -55    -63     17 |      13     35
gfz   uuuuu |    -19     24     27     27    -14 |      10     30
igr   xxxxx |      2    -12     -6    -37     17 |       0     25
jpl   uuuuu |     20     -1     -5     29     21 |     -33     48
ngs   uuuuu |    -66    -91     58   -250     -7 |     -19     58
sio   uuuuu |    -13    -11     15     31     32 |     -10     45

Table 7.0940.1   GPS week: 0940   Day: 1   MJD: 50825.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -15     39     -6     -3    -11 |      -9     14
emr   uuuuu |     17    -25     37    -18     26 |     -24     52
esa   uuuuu |      7    -53    -59   -104     11 |      12     34
gfz   uuuuu |    -16     30     35      4      5 |       8     29
igr   xxxxx |     -6    -28     -8    -47      1 |      -1     24
jpl   uuuuu |     21    -17      1     39     15 |     -33     48
ngs   xxxxx |    -69    -96     36    -81     45 |     -21     59
sio   uuuuu |    -24     -5     -6      9     43 |      -9     44

Table 7.0940.2   GPS week: 0940   Day: 2   MJD: 50826.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -13     28      9      6    -10 |      -9     14
emr   uuuuu |     26    -27     13    -58     14 |     -19     46
esa   uuuuu |    -19    -35    -79    -68      2 |      15     32
gfz   uuuuu |    -12     25      4     38    -22 |       9     28
igr   xxxxx |     -9    -15     14    -31     -6 |       0     23
jpl   uuuuu |     33    -11     14     44      6 |     -30     43
ngs   uuuuu |    -30    -64      1   -234      2 |     -16     55
sio   uuuuu |    -22    -11      9     -4    112 |      -4     42

Table 7.0940.3   GPS week: 0940   Day: 3   MJD: 50827.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |      2     33      7      3    -13 |     -10     17
emr   uuuuu |     12    -57     39     51     93 |     -17     44
esa   uuuuu |      8    -21    -42    -73     12 |      16     32
gfz   uuuuu |    -11     17     14      7    -26 |       8     29
igr   xxxxx |     -1    -26    -70    -15     15 |       0     23
jpl   uuuuu |     22      0    -12     27    -39 |     -30     43
ngs   uuuuu |    -92    -44     24    -68     34 |     -16     54
sio   uuuuu |    -12     -6      0      7     57 |       1     45

Table 7.0940.4   GPS week: 0940   Day: 4   MJD: 50828.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |     -2     24     -2      2     -4 |     -11     18
emr   uuuuu |     13    -15     58     33     15 |     -12     46
esa   uuuuu |     32    -35    -25    -93    -17 |      17     32
gfz   uuuuu |    -17     21     30     29     -8 |       6     28
igr   xxxxx |    -23     -9    -45    -10     14 |       1     23
jpl   uuuuu |     26     -5    -18     34    -12 |     -32     46
ngs   uuuuu |   -107    -43    -67    -75    105 |     -16     54
sio   uuuuu |    -24      1    -13     13      3 |       5     46

Table 7.0940.5   GPS week: 0940   Day: 5   MJD: 50829.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -14     36     11     26      3 |     -11     18
emr   uuuuu |     27    -31     67    -43     28 |     -10     44
esa   uuuuu |     32    -70    -71   -102     15 |      18     31
gfz   uuuuu |    -18     20     20     31    -27 |       5     28
igr   xxxxx |     -6    -25    -25    -56    -12 |       4     19
jpl   uuuuu |     24      1    -14     25    -16 |     -30     43
ngs   uuuuu |    -45    -52    -44    -81    -51 |      -7     52
sio   uuuuu |    -40     10      1     21     46 |       4     46

Table 7.0940.6   GPS week: 0940   Day: 6   MJD: 50830.5
                                                     AC LOD   AC LOD
CENT  FLAG  |  Xpole  Ypole    Xrt    Yrt    LOD |    BIAS  BIAS RMS  
------------------------------------------------------------------------
cod   uuuuu |    -14     29    -12     13      6 |     -11     18
emr   uuuuu |     50    -36     -9    -85    -13 |     -10     44
esa   uuuuu |     30    -57    -10     -6     12 |      18     31
gfz   uuuuu |    -13     11     16     37      7 |       5     28
igr   xxxxx |    -55    -68     14    -39    -16 |       4     19
jpl   uuuuu |     23     -1      7     19    -46 |     -30     43
ngs   uuuuu |    -71    -35    -13   -288      2 |      -7     52
sio   uuuuu |    -47     17     -6     15    -21 |       4     46

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