[IGSREPORT-20636] Wk 1676 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri Mar 9 08:25:22 PST 2012


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1676   (Feb 19, 2012 - Feb 25, 2012)

Contacts: J. Griffiths (jake.griffiths at noaa.gov)
          K. Choi (kevin.choi at noaa.gov)


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 that uses both phase and pseudorange data. 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  [distance unit],

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 (as part of the separate SINEX combination since GPS
week 1051; weighted according to the orbit combination before that time). 

  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:

igs1676[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1676[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1676[0-6].cls  IGS GPS clock combination summary report.
igs16767.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16767.sum      Complete report.

    
REMARKS concerning the IGS Orbit Combination:                                  
---------------------------------------------

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, MIT, and
    JPL. The other centres are excluded because of poorer consistency (GRG),
    they 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. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1582, a new solution from CNES/GRGS (GRG) is included with
    weight except for the clock and LOD combinations.

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

 4. The following clock solutions were excluded from the combination because they
    were biasing the combined clock solutions (clock shifts/outliers) but were
    kept for the RMS computation.  Duplicate entries can arise due to separate
    combination runs for the 30-s clocks ACs (listed first) and the 5-min clock
    ACs (listed second).
    
               Day | Centre | PRN/STA list
               ----+--------+---------------
                0  |  COD   | XMIS
                0  |  EMR   | NNOR
                0  |  ESA   | COCO UNSA
                0  |  GFZ   | 5 11 BRFT DAV1 STHL
                0  |  GRG   | USN3
                0  |  JPL   | 1
                0  |  MIT   | 1 1
                1  |  COD   | TIXI SOFI SUTM
                1  |  EMR   | KHAJ KHAJ
                1  |  ESA   | MATE NNOR TIXI UNSA
                1  |  GFZ   | 5 BRFT DAV1 DGAR HOLB PDEL PIMO REUN
                1  |  GRG   | USN3
                1  |  JPL   | 11
                1  |  MIT   | 9 9 MAW1 MAW1
                2  |  ESA   | HYDE HYDE NNOR UNSA
                2  |  GFZ   | 22 BRFT DGAR KARR SCOR
                2  |  GRG   | BRST KIT3 USN3
                2  |  JPL   | 10
                2  |  MIT   | 11 19 11 19
                3  |  COD   | YELL NKLG SOFI YELL
                3  |  ESA   | NNOR UNSA
                3  |  GFZ   | 11 30 BRFT COCO DAV1 DGAR MAS1 MDVJ TIDB
                3  |  GRG   | LHAZ USN3
                3  |  JPL   | 30
                3  |  MIT   | 11 26 11 26 MAC1 MAW1 MAW1
                4  |  EMR   | 27
                4  |  ESA   | NNOR UNSA
                4  |  GFZ   | 11 BRFT DGAR NKLG OPMT
                4  |  GRG   | USN3
                4  |  JPL   | 27
                4  |  MIT   | 3 3 8 9 10 HYDE NRC1
                5  |  EMR   | 27 27
                5  |  ESA   | NNOR UNSA
                5  |  GFZ   | 11 BRFT KARR
                5  |  GRG   | DARW USN3
                5  |  JPL   | 27
                5  |  MIT   | 27 27 CAS1 DAV1 BOR1 CAS1 DAV1
                6  |  COD   | MOBS SOFI SUTM
                6  |  EMR   | 27 MCM4 MATE
                6  |  ESA   | NNOR
                6  |  GFZ   | 11 BRFT KERG NYAL RIO2
                6  |  GRG   | USN3
                6  |  JPL   | 27
                6  |  MIT   | 5 9 21 26 5 9 21 26 27 CAS1 DAV1 MDVJ CAS1 DAV1 MDVJ

 5. The following table lists all maneuvered satellites for this week.
    The solutions from COD and ESA, which modeled the maneuver, are used
    that day for combination. An associated accuracy code of 0 (unknown) 
    is given if only one AC is left (no redundancy). For the long arc  
    evaluation the arc is split into two parts at the given maneuver epoch.
    
               PRN |    Date    | Ref. NANU
               ----+------------+----------
               G27 | 2012_02_22 | 2012009 

 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
               ----+--------+---------------
                0  |  ESA   | ALL (high Transformation - See Table 2)
                1  |  ESA   | ALL (high Transformation - See Table 2)
                2  |  ESA   | ALL (high Transformation - See Table 2)
                3  |  ESA   | ALL (high Transformation - See Table 2)
                4  |  ESA   | ALL (high Transformation - See Table 2)

 7. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011
    (GPS Week 1631, day 6, MJD 55667) all IGS products, including the IGS
    combined orbits, are based on the IGS realization of the ITRF2005 reference
    frame (IGS05).   For more information see IGSMAIL #5447.  The IGS05 frame
    is also the basis for the homogeneously reprocessed IGS products from GPS
    Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products,
    are based on the IGS realization of the ITRF2008 reference frame (IGS08).
    For more information see IGSMAIL #6354.
    

 8. Small rotations were applied to all the AC orbit and ERP values in order
    to align them to the current IGS reference frame. These rotations were
    estimated in the IGS SINEX combination process, performed by the IGS Reference
    Frame Coordinator at the Institut Geographique National (IGN). The estimated 7
    transformations, from which only the 3 rotations are applied to the orbit and
    ERP values, are:
    
            |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+---------------------------------------------------
       COD  |   -1.1     .3   -1.2     -65      9      2     .19
       EMR  |    6.8     .0   13.4      -4    -13     -4     .42
       ESA  |    5.8    -.5  -16.7      59   -307    223    -.10
       GFZ  |   -1.5     .3   -1.4     -42     24     -1     .21
       GRG  |     .5    2.7    -.7     -33     42    -16     .13
       JPL  |   -2.9    5.7   20.4     -49    -11      3     .43
       MIT  |    4.6   -4.2    2.2     -30     26    -53     .18
       NGS  |    4.8   -4.3    -.5     -21    -34     32     .38
       SIO  |    3.0   -5.0   -2.3    -105   -129     82     .11


 9. Starting on 22-Oct-2000 (GPS Week 1085-0; mjd=51839) all IGS clock products
    are based on the new clock combination scheme which uses the clock RINEX
    files as input if available, otherwise SP3 clocks are used. 
    The navigation solution is still based on the SP3 clocks but this will soon
    adopt the clock RINEX files as well.

10. Starting on 27-Feb-2000 (GPS Week 1051-0; MJD 51601) the IGS final products
    are aligned to the IGS reference frame products (station coordinates and
    ERPs as generated by IGN). For more information see IGSMAIL #2750.
    Because of this change in alignment Table 2 has been enhanced with one 
    additional line per AC. This additional line shows the X- and Y-rotations 
    which were applied to each of the AC orbits prior to the orbit combination. 
    These rotations are based on the difference between the individual AC ERP 
    estimates and the IGS reference frame ERP product. The total rotation of
    the individual AC orbits w.r.t. the IGS combined orbit is the sum of the
    values in the two lines of Table 2 plus the reference frame rotation.

11. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011
    (GPS Week 1631, day 6, MJD 55667) the absolute antenna model is introduced
    (IGSMAIL #5438). The antenna phase center offsets and phase center
    variations are given in the file:
        ftp://igs.org/igscb/station/general/igs05.atx
    These antenna calibrations are also used in the homogeneously reprocessed
    IGS products from GPS Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) the absolute antenna
    model is updated (IGSMAIL #6255 & #6374) as given in the file:
        ftp://igs.org/igscb/station/general/igs08.atx
    The JPL solution did not use IGS08/igs08.atx until GPS Week 1649, which
    caused their RMS clock residuals to be higher during that period than for
    the other centres; since GPS Week 1632 the JPL solution is excluded from
    the weekly SINEX combination.

    
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 1.1676.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1676.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 2.1676.[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 3.1676.[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 4.1307). The fifth and final
part, Table 5, is similar to Table 4 and contains daily precise navigation
statistics (tables 5.1676.0-6).

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 1676 summary.                       (Feb 19, 2012 - Feb 25, 2012)

Table 1.1676.a   GPS week: 1676   MJD: 55976.000-55982.000

         Mean and standard deviations of transformation parameters to the 
         combined IGS orbit.
         WRMS - orbit RMS weighted by the SP3 header accuracy codes.
         STA  - Mean number of stations in the daily solutions.
   
CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|    0     0     2    41   -39    10  -.35   10    9 |    -697     -35     19     88
        |    0     0     1    10    41    20   .02           |     709    1024
emr   95|    1     1     8   -63   -23   -45   .36   20   20 |    4157      43     16    118
        |    1     1     1    36    62    14   .03           |     480     710
esa  131|    0     1     2  -138   371    49   .15   11   10 |    -525     254     14    161
        |    0     0     1    28    64    54   .04           |     965    1465
gfz  193|    0    -1    -3     5   -86    -9   .42   13   13 |    -183     110     34    112
        |    1     1     1    59    85    18   .03           |     313     294
grg  125|    0     1     1   -31   -97   -21   .52   15   14 |     -72      11     45    211
        |    1     0     1    19    32     8   .04           |     271     486
igr  n/a|    0     0     0   -68   -39   -31  -.08    5    5 |    5614     498     19     93
        |    0     0     0    16    43    32   .03           |    1581     819
jpl  134|    0     0     5     1     0     6   .49   14   14 |    3754    -108     19    104
        |    2     1     1    23    31    16   .02           |     516     714
mit  271|    0    -1    -6     0   -78   -36  -.44   12   11 |    -205     148     26    199
        |    1     1     0    25    35    30   .02           |     258     308
ngs  223|    0     0    -1   -24    22   -18  -.21   11    8 |    -716     -63   2188   3808
        |    1     1     0    30    73    17   .09           |     683     973
sio  244|   -1    -1    -4   129   227    82  -.37   20   19 |     ---     ---    ---    ---
        |    0     1     0    29    37    22   .04           |     ---     ---


Table 1.1676.b   GPS week : 1676   MJD: 55976.000-55982.000   

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

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    6    5    5    5    5    5    5 |
   2  |    5    5    5    5    5    4    4 |
   3  |    5    4    4    4    4    4    4 |
   4  |    5    4    5    5    5    5    4 |
   5  |    7    6    5    5    5    4    4 |
   6  |    5    5    4    4    5    4    4 |
   7  |    6    5    7    5    5    4    5 |
   8  |    6    5    5    5    5    5    5 |
   9  |    7    6    7    6    7    7    6 |
  10  |    5    5    5    5    5    4    5 |
  11  |    6    6    5    4    4    4    4 |
  12  |    6    6    5    6    5    5    5 |
  13  |    5    5    5    5    5    4    4 |
  14  |    5    5    5    5    5    4    4 |
  15  |    5    5    5    5    5    5    5 |
  16  |    6    6    6    6    5    5    5 |
  17  |    6    5    5    5    5    5    5 |
  18  |    6    6    6    6    6    5    5 |
  19  |    6    7    6    5    5    5    4 |
  20  |    5    5    5    5    5    5    5 |
  21  |    5    6    6    5    5    5    4 |
  22  |    5    5    5    5    5    5    5 |
  23  |    5    5    5    5    5    4    4 |
  24  |    0    0    0    0    0    0    0 |
  25  |    5    5    5    5    5    4    4 |
  26  |    6    6    6    6    6    4    4 |
  27  |    7    7   11    0   10    7    7 |
  28  |    5    5    5    5    4    4    4 |
  29  |    6    6    6    5    5    5    4 |
  30  |    4    4    4    4    4    4    4 |
  31  |    6    6    6    5    5    5    5 |
  32  |    5    5    5    6    5    5    5 |



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1676.0   GPS week: 1676   Day: 0   MJD: 55976.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|    0     0     3    36    -4    10  -.36   10    9 |    -626     600     19     76
        |                      7   -41                       |
emr   95|    1     0     4   -67    19   -45   .36   20   20 |    3395     439     17    125
        |                    -30   -13                       |
esa  131|    1     0     3  -170   400     6   .15   14   13 |     417   -1764     15    143
        |                     17    70                       |
gfz  193|    0     1    -3   -56  -149   -11   .44   16   15 |    -480     220     35    109
        |                      8    65                       |
grg  125|    0     0     0   -28   -69   -16   .56   17   15 |    -108    -141     48    251
        |                    -15   -74                       |
igr  n/a|    0     0     0   -70   -29   -23  -.09    6    6 |    3164     783     19     78
        |                    -16    65                       |
jpl  134|   -1     0     5   -21    12     0   .51   15   14 |    3584      95     18     90
        |                     32     1                       |
mit  271|    0     0    -5   -14   -92   -11  -.42   14   13 |       4      25     28    183
        |                      4    11                       |
ngs  223|    2     0    -2     2    86    -5  -.19   10    8 |    -665     466   2455   4284
        |                    -19   -18                       |
sio  244|   -2    -4    -2   107   218    79  -.32   21   19 |     ---     ---    ---    ---
        |                    -93   -92                       |

Table 2.1676.1   GPS week: 1676   Day: 1   MJD: 55977.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|   -1     0     0    56   -15     0  -.33    9    9 |    -494    -448     21     94
        |                    -18     0                       |
emr   95|    3     3     9   -49    44   -14   .39   20   20 |    4412    -542     16    116
        |                     -3    -9                       |
esa  131|    0     1     2  -139   414    43   .18   11   11 |    -205    -104     11    151
        |                     16    65                       |
gfz  193|   -2    -4    -1   -70  -187    -6   .47   15   15 |    -392     125     34    114
        |                    -21    52                       |
grg  125|    0     0     0   -53   -96   -21   .51   16   14 |    -135    -432     42    222
        |                    -10   -59                       |
igr  n/a|    0     0    -1   -68    -8   -27  -.07    5    5 |    4477      83     18     88
        |                    -30    61                       |
jpl  134|    0     2     7     7    18    14   .51   14   14 |    4091    -693     20     98
        |                      6    -1                       |
mit  271|    3    -1    -5   -36   -59   -21  -.43   13   12 |    -194    -119     26    195
        |                     11    16                       |
ngs  223|   -1     0    -1     8    83    -1  -.20    9    8 |    -540    -419   2619   4651
        |                    -67   -54                       |
sio  244|    0    -3    -4    88   250    86  -.34   20   19 |     ---     ---    ---    ---
        |                    -91   -96                       |

Table 2.1676.2   GPS week: 1676   Day: 2   MJD: 55978.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|   -1     1     2    38   -15    44  -.37   10    9 |   -1495     787     20     84
        |                     11     4                       |
emr   95|    0     2     9  -110    27   -52   .37   19   19 |    3852     267     18    125
        |                     -7   -25                       |
esa  131|    2     1     2  -158   410    17   .20   12   11 |    -177    -670     14    152
        |                     14    50                       |
gfz  193|    1    -1    -4    16  -158   -13   .40   14   13 |    -447     308     34    110
        |                    -23    69                       |
grg  125|   -1     1     0   -36   -87    -8   .49   15   14 |    -295     -18     37    202
        |                      4   -51                       |
igr  n/a|    1     0     0   -94   -15     6  -.07    6    5 |    4610    1022     20     82
        |                    -36    73                       |
jpl  134|   -1     0     6   -40    20    20   .51   13   13 |    3495     187     17     96
        |                     44    20                       |
mit  271|    2     0    -5    10   -58   -29  -.43   11   10 |    -661     486     27    142
        |                      3    14                       |
ngs  223|    0     0    -2   -57    89   -10  -.21   11    8 |   -1424     574   2260   3852
        |                     -3    -5                       |
sio  244|    0    -1    -3   152   254    69  -.37   19   18 |     ---     ---    ---    ---
        |                   -115   -97                       |

Table 2.1676.3   GPS week: 1676   Day: 3   MJD: 55979.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|    0     0     1    40    -4    19  -.31    9    9 |    -784      10     22    111
        |                    -16   -27                       |
emr   95|    1     0    10   -74     0   -48   .40   19   19 |    4051    1064     14    120
        |                     -7    20                       |
esa  131|    0     1     4  -166   428    18   .17   11   11 |   -2530    3014     14    192
        |                      6    25                       |
gfz  193|    0    -2    -2   -23   -86   -11   .45   13   12 |    -114     284     34    119
        |                    -16    16                       |
grg  125|    0     2     2   -34   -54   -20   .49   15   16 |    -315     408     46    203
        |                      0   -46                       |
igr  n/a|    0     0     0   -64     2    -4  -.03    5    5 |    5790    1742     22    112
        |                    -38    51                       |
jpl  134|    0    -1     4    11    22    29   .49   14   14 |    3832    1130     21    131
        |                     29   -13                       |
mit  271|    0     0    -7    -4   -67   -12  -.40   10   10 |    -273     172     24    208
        |                    -14    11                       |
ngs  223|    0     0     0   -32    48   -18  -.23   10    8 |    -747     -57   1838   3337
        |                     -1    35                       |
sio  244|   -2    -1    -5   108   227   116  -.35   19   19 |     ---     ---    ---    ---
        |                    -99   -80                       |

Table 2.1676.4   GPS week: 1676   Day: 4   MJD: 55980.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|    0     0     3    31   -46    16  -.38   10    9 |     716   -2108     20     94
        |                     29    29                       |
emr   95|    0     2     8   -97   -43   -51   .36   19   19 |    4587     326     16    120
        |                     19    27                       |
esa  131|    1     2     1  -128   388     7   .13   12   12 |     -66     288     15    172
        |                     -2    36                       |
gfz  193|    0    -2    -4    33    47    27   .39   11   12 |     416     138     35    115
        |                    -18    32                       |
grg  125|    0     1     2   -48   -94   -20   .49   15   14 |     241      17     47    208
        |                     16    -6                       |
igr  n/a|    0     0     0   -82   -25   -19  -.11    5    5 |    7125     667     20     95
        |                    -28    36                       |
jpl  134|    4     0     4     3    16     3   .45   14   14 |    4439      96     21    103
        |                     25   -17                       |
mit  271|    0    -1    -6    -3   -28   -19  -.44   10   10 |     170     -57     29    234
        |                      5     1                       |
ngs  223|   -2    -1     0   -45   -10   -19  -.05   11    9 |     656   -2058   2205   3598
        |                    -48    50                       |
sio  244|   -2     0    -5   138   277   106  -.41   19   18 |     ---     ---    ---    ---
        |                    -96  -107                       |

Table 2.1676.5   GPS week: 1676   Day: 5   MJD: 55981.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|    0     0     3    29   -90     0  -.36   10   10 |   -1168     822     19     87
        |                      9     8                       |
emr   95|    0     0     8   -48  -106   -45   .32   20   20 |    4811    -143     18    108
        |                    -46    18                       |
esa  131|    0     1     0  -113   267   111   .15    8    8 |    -206     305     18    152
        |                      1    47                       |
gfz  193|    1     0    -2   102    -7   -28   .39   11   11 |    -231     239     36    107
        |                     -4     6                       |
grg  125|   -1     0     0   -26  -131   -23   .53   15   14 |    -264     836     46    209
        |                      8   -25                       |
igr  n/a|    0     0     1   -51   -94   -67  -.13    5    5 |    7361     -24     20     90
        |                    -53    41                       |
jpl  134|    1     0     4    19   -37   -22   .49   15   15 |    4006    -566     21    103
        |                      8   -28                       |
mit  271|    0    -2    -6    47  -125   -76  -.46   12   11 |    -211     654     30    197
        |                    -18    -5                       |
ngs  223|    0    -1    -1   -56   -91   -17  -.33   11   10 |   -1227     840   2022   3580
        |                     18   103                       |
sio  244|   -1     0    -4   173   179    51  -.42   20   20 |     ---     ---    ---    ---
        |                    -98   -98                       |

Table 2.1676.6   GPS week: 1676   Day: 6   MJD: 55982.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|    1     0     2    55  -104   -20  -.36    9    8 |   -1030      89     18     76
        |                     31     5                       |
emr   95|    0     1     9     1  -102   -58   .31   20   20 |    3997   -1108     13    117
        |                    -89    31                       |
esa  131|    0     0     1   -95   290   140   .09    7    7 |    -914     712     13    168
        |                    -19    32                       |
gfz  193|    0     0    -4    33   -64   -22   .40   11   12 |     -36    -539     31    110
        |                    -28    28                       |
grg  125|    1     1     2     6  -148   -36   .61   14   12 |     366    -588     52    188
        |                    -19   -14                       |
igr  n/a|    0     0    -1   -46  -107   -84  -.10    5    5 |    6773    -786     19    108
        |                    -41    48                       |
jpl  134|    0     0     3    27   -53    -3   .49   16   16 |    2831   -1009     20    108
        |                     21   -26                       |
mit  271|    0    -3    -5     1  -119   -84  -.47   12   11 |    -275    -123     23    234
        |                     14    -6                       |
ngs  223|    0     0    -2     8   -49   -55  -.29   11    8 |   -1068     213   1920   3356
        |                     10    18                       |
sio  244|   -1     0    -4   141   182    66  -.41   22   19 |     ---     ---    ---    ---
        |                    -63  -110                       |

       
       
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 (earth).
         "M"    stands for eclipsing satellites (moon).
         "X"    stands for excluded from the statistics but included in IGS orbit.
         "T"    stands for Total long arc orbit RMS for all satellites.
         "NE"   stands for long arc orbit RMS for Non-Eclipsing satellites only.
         "MEDI" stands for median of the centre's satellite RMS.
         "MD"
         Units: mm.

Table 3.1676.0   GPS week: 1676   Day: 0   MJD: 55976.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   21   15   14   21    5   11   12    9   26    5 |    44   51   45   45   43   42   49   39   41   38    42
   2  |    9   25    8   15   17    5   14   10    7   16    5 |    28   43   32   28   32   28   35   29   30   28    30
   3  |    8   14   15   15   13    5   13   14    8   11    4 |     9   18   19   16   16   12   22   13   16   13    12
   4  |    8   14   12   10   16    9   11   11   12   17    4 |    15   23   20   19   17   15   26   13   21   21    18
   5  |   10   18   11   33   12    6   18   17   14   32    7 |    21   27   31   43   31   24   29   30   28   35    26
   6  |    9   15   14   16   12    6    9   17    9   15    4 |    10   19   17   19   16   10   18   14   12   17    11
   7  |    8   20   17   11   20    5   20   16    8   14    5 |    31   35   33   29   41   28   33   29   29   27    29
   8  |   18   18   18    9   18    5   14   18    8   17    5 |    21   25   22   24   20   19   28   16   19   15    18
   9E |   21   21   17   19   18    9   16   12   11   24    6 |   118  118  121  115  116  118  115  125  120  123   116
  10  |    8   11   11   11   11    7    9   13   10   36    5 |    19   21   29   31   28   23   24   27   27   39    25
  11  |    9   17   14   15   23    4   12   26   10   19    6 |    50   52   48   51   50   48   48   52   52   48    49
  12  |    9   24   15   16   19    5   15    9    9   19    5 |    12   28   21   28   27   15   25   18   16   17    16
  13  |    8   21   14   10   21    6   11   10    9   14    4 |    16   29   26   24   37   17   26   19   20   17    18
  14  |    9   25   13   13   14    6   14   15    6   14    5 |    13   28   20   25   28   14   23   23   13   16    16
  15  |    6   20   14   15   20    7   17   15    8   18    5 |    11   26   25   26   27   15   23   18   17   17    15
  16  |    8   23   14   17   15    6   16   13    9   29    5 |    14   27   17   24   25   14   25   13   18   16    16
  17  |    8   24   17   18   22    6   20   13   13   13    6 |    24   33   25   26   29   22   31   24   32   21    24
  18  |   12   17   13   16   13    6   13   16    6   28    5 |    18   28   27   38   31   23   27   29   21   29    23
  19  |    9   27   16   16   18    5   17   19   11   23    6 |    17   32   19   14   20   17   25   22   19   25    18
  20  |    7   18   14   19   10    6   14   11   10   21    5 |    28   29   34   33   27   29   29   33   33   32    30
  21  |    9   23   12   17   13    6   13   12   10   18    5 |    27   39   33   37   41   28   36   23   33   20    30
  22  |    9   17   14   13    9    6   12   16    8   29    5 |    24   29   31   35   34   28   29   36   27   34    28
  23  |    7   22   15   14   15    7   17   13    9   20    5 |    19   32   27   27   28   19   27   23   23   24    21
 X24  |    6  ---  ---  ---  ---   36  ---  ---  ---  ---    0 |    23  ---  ---  ---  ---   29  ---  ---  ---  ---    25
  25  |    8   16   10   14   21    3   15   14    7   13    5 |    22   27   28   28   40   23   35   28   25   23    26
 X26  |   10   18   12   18   14    7   16   14   18  ---    6 |    15   18   18   23   18   12   18   17   22  ---    14
 X27E |   14   23   14   15   23    8   18   19   14  ---    7 |    31   31   26   19   18   27   31   27   21  ---    28
  28  |    8   21   19   12   16    5   13   12   14   21    5 |    18   30   27   26   32   19   29   20   24   20    21
  29  |    7   22   11   16   17    7   23   10   10   15    5 |    17   29   23   27   24   18   33   18   19   26    20
  30  |    7   12   15   16   13    6    9   12    9   16    4 |    12   18   20   22   19   11   19   13   14   17    14
  31E |    7   20   13   16   20    6   19   15    7   14    5 |    21   26   25   32   41   23   32   21   24   23    23
  32  |    8   18   13   13   13    6   12   11    7   23    4 |    16   16   21   20   20   16   16   23   19   17    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   20   14   16   17    6   15   14   10   21      |T   23   31   29   30   31   24   31   26   26   27    25
 WRMS |    9   20   13   15   15    6   14   13    8   19      |NE  19   27   25   27   27   20   27   22   22   23    21
 MEDI |    8   20   14   15   16    6   14   13    9   18      |MD  19   28   26   27   28   19   28   23   22   23    21

Table 3.1676.1   GPS week: 1676   Day: 1   MJD: 55977.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   21   11   13   14    5   13   14   10   20    5 |    35   39   38   34   36   33   43   32   34   31    33
   2  |    9   22   10   18   16    3   12   11   10   16    5 |    22   34   25   25   26   21   28   22   25   22    24
   3  |    9   13   10   15   12    5   10   11    8   11    4 |    12   18   16   21   20   11   20   13   12   13    13
   4  |    8   15    8   14   13    7   10   10    9   16    4 |    16   23   17   17   16   12   24   16   14   21    16
   5  |    8   18    8   20   10    5   17   13    8   28    5 |    14   21   18   30   23   15   24   21   17   25    18
   6  |    9   14    8   14   10    4   10   12   10   15    4 |    11   18   15   23   20   10   20   12   13   14    13
   7  |   12   16   12   12   12    6   17   11    7   11    4 |    68   71   69   69   67   68   76   68   67   69    69
   8  |   15   20   10   13   12    4   10   13    9   17    5 |    17   26   19   28   24   16   27   16   17   17    20
   9E |   11   24   17   19   14    8   16   11   11   34    6 |    66   67   65   62   60   65   66   68   68   61    65
  10  |   10   12    9   11    8    5    8   14    5   30    4 |    17   17   19   23   20   16   22   22   18   32    20
  11  |   11   17   11   11   17    5   12   28   11   22    6 |    34   38   33   39   38   31   37   38   35   34    35
  12  |   10   21   14   17   19    6   16   10    8   19    5 |    15   28   18   25   26   13   25   14   14   14    16
  13  |    7   17   11   12   19    4   12   10    8   12    4 |    22   31   26   27   36   20   30   21   21   20    23
  14  |    8   27   11   16   16    6   14   16    8   13    5 |    15   27   20   24   28   15   23   18   13   14    16
  15  |    7   23   13   18   17    5   18   11    6   17    5 |    13   28   15   24   24   10   23   16   11   16    15
  16  |    8   22    8   13   16    4   14    9    9   30    5 |    13   27   17   22   25   11   25   14   15   17    16
  17  |    6   23   14   15   20    6   18   12    9   10    5 |    17   30   22   25   31   16   27   20   19   16    19
  18  |   13   19   10   21   13    5   15   15    7   28    6 |    15   25   21   36   23   17   25   21   18   19    18
  19  |   10   28   13   14   20    5   17   19   10   27    6 |    15   30   16   19   23   11   22   20   12   22    14
  20  |    9   20   11   19   10    5   11   10   11   22    5 |    27   30   25   32   22   23   26   29   26   31    27
  21  |    8   28   11   17   13    6   16   13   11   14    5 |    24   39   30   33   36   25   34   21   23   17    26
  22  |    8   18   13   15   11    6   15   14    7   28    5 |    19   27   23   29   26   21   26   24   19   22    20
  23  |    8   25   15   14   15    7   16   12    8   20    5 |    27   34   30   27   28   25   32   26   26   22    26
 X24  |    6  ---  ---  ---  ---   38  ---  ---  ---  ---    0 |    20  ---  ---  ---  ---   26  ---  ---  ---  ---    23
  25  |    7   17   10   14   22    4   13   14   11   13    5 |    22   27   24   22   37   19   31   21   22   24    24
 X26  |    9   16   13   29   13    8   12   12   12  ---    6 |    14   16   16   26   19   10   19   13   17  ---    15
 X27E |   13   26   16   17   19    8   16   16   18  ---    7 |    27   29   21   16   17   22   25   23   22  ---    23
  28  |    7   25   16   13   15    6   14   12    8   17    5 |    14   34   22   25   32   14   29   17   15   16    18
  29  |    7   22    8   16   18    4   19   15    7   14    5 |    17   26   19   23   23   15   26   18   15   20    17
  30  |    8   12    8   12   16    4    9   10    8   16    4 |    10   17   18   19   19   11   16   13   11   15    12
  31E |   10   19   12   11   26    7   17   14    9   14    5 |    33   38   37   38   51   30   42   38   34   38    37
  32  |    9   21   11   11   10    6   12    9   12   25    5 |    18   19   18   16   15   15   20   21   19   16    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20   11   15   16    5   14   13    9   20      |T   22   30   24   28   28   20   29   23   22   24    23
 WRMS |    9   20   11   15   14    5   14   12    8   19      |NE  17   26   21   25   25   16   25   19   17   19    19
 MEDI |    8   20   11   14   15    5   14   12    9   17      |MD  17   28   21   25   25   16   26   21   18   20    19

Table 3.1676.2   GPS week: 1676   Day: 2   MJD: 55978.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6   20   13   12   16    5   12   12   14   21    5 |    41   46   42   40   41   39   44   36   40   37    38
   2  |    9   22   11   15   12    4   12    8    9   14    4 |    23   36   27   23   26   22   28   25   24   25    24
   3  |    8   14   10   15   13    5    9    8   11   11    4 |     8   20   16   20   20   12   20   13   18   13    12
   4  |   10   14   11   12   12    7   11   10   12   14    4 |    18   26   17   18   17   15   22   18   14   21    15
   5  |    9   14    9   13   11    6   16   11   12   25    5 |    17   21   19   33   25   20   24   25   22   27    20
   6  |    8   15   11   15   11    5    9   10   11   12    4 |    10   19   14   23   20   12   20   16   16   14    12
   7E |   28   18   14   19   20   11   17   13   15   13    7 |    84   93   89   98   96   82   93   87   87   78    88
   8  |   14   19   11    8   14    5   10   12   12   15    5 |    15   25   18   23   23   15   24   18   17   17    16
   9E |   14   22   13   17   18    8   16   12   11   31    6 |    57   56   57   57   51   57   53   63   61   56    55
  10  |   11   11    7    9    8    6    7   12    8   29    4 |    14   16   20   23   22   16   19   22   16   34    17
  11E |    6   16   12   13   12    5   10   17   14   18    5 |    41   49   49   47   49   43   47   46   47   39    44
  12  |    9   21   15   15   17    5   15   10    7   19    5 |    12   26   18   22   24   13   23   19   15   17    14
  13  |    7   19   10   13   17    5   12   11    6   10    4 |    12   26   18   24   32   10   24   19   11   18    16
  14  |    9   22   10   15   15    6   11   13    7   11    4 |    14   24   20   28   29   16   22   22   18   16    17
  15  |    8   18   13   15   17    5   14   10    9   16    5 |    11   21   21   27   24   15   21   19   18   18    15
  16  |    9   27    9   15   19    4   14    8   12   27    6 |     9   28   16   20   25   13   23   13   17   14    12
  17  |    5   17   12   12   20    6   18   11   10   11    5 |    13   25   17   22   29   13   25   18   12   18    15
  18  |   11   20   12   21   13    5   12   14   12   26    6 |    16   25   22   37   26   19   24   26   20   21    20
  19  |    8   22   13   15   20    7   13   14   11   20    5 |    14   28   17   19   20   11   20   20   18   21    14
  20  |    7   18   13   12   13    5   13   11   13   19    5 |    22   26   19   27   20   18   23   24   23   29    22
  21  |   10   23   10   19   18    4   14   11   15   13    5 |    22   35   26   32   32   25   30   20   28   19    24
  22  |    8   18   10   15    9    4   12   13    9   25    5 |    22   25   23   34   29   24   27   30   25   25    24
  23  |    7   25   12   14   15    6   15   13    6   20    5 |    16   29   19   20   23   13   23   21   17   18    16
 X24  |    7  ---  ---  ---  ---   35  ---  ---  ---  ---    0 |    13  ---  ---  ---  ---   29  ---  ---  ---  ---    16
  25  |    8   16   16   14   18    3   14   12    8   13    4 |    18   23   24   22   33   19   28   22   18   20    20
 X26  |   11   16   14   19   14    8   10   11   14  ---    5 |    17   19   20   29   21   20   20   18   24  ---    17
 X27E |   14  ---   15  ---  ---   10   18   15  ---  ---   11 |    29  ---   21  ---  ---   23   26   26  ---  ---    25
  28  |    7   19   12    9   14    7   12   11   12   16    4 |    13   31   19   23   30   17   26   19   17   16    17
  29  |    6   19   12   14   18    4   19   13   11   14    5 |    14   22   18   22   20   13   24   15   19   21    13
  30  |    9   14    8   12   14    3    7    7   11   14    4 |     8   21   16   21   23   13   19   13   17   16    13
  31E |   14   20   10   13   18    5   19   10   16    9    5 |    37   46   46   48   47   44   51   45   49   48    44
  32  |    9   16   10   10   14    5   12    8   10   24    4 |    14   16   15   18   19   14   17   24   18   21    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   19   12   14   15    6   13   11   11   19      |T   21   30   25   30   29   22   28   25   24   25    22
 WRMS |    9   19   11   13   14    5   13   10    8   18      |NE  15   25   20   25   25   17   23   20   19   20    17
 MEDI |    9   18   12   14   14    5   12   11   11   16      |MD  15   25   19   23   25   16   24   21   18   21    17

Table 3.1676.3   GPS week: 1676   Day: 3   MJD: 55979.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   19   11   11   18    5   13   12   12   18    5 |    43   50   45   45   48   41   46   37   40   38    41
   2  |    9   22    8   12   19    4   13   10   11   16    5 |    29   40   31   30   33   30   37   30   27   30    30
   3  |    9   11   10   14   14    4    9    7   11   14    4 |    12   19   19   24   19   13   22   12   21   13    14
   4  |    7   14   10   10   15    7   14   11   12   15    4 |    13   21   19   19   16   13   24   13   18   17    14
   5  |    7   13    9   12   11    5   15   10   10   26    4 |    16   21   23   24   22   19   25   23   23   27    20
   6  |    7   14    9   15   12    3   10    9   10   16    4 |    13   19   18   24   18   12   21   12   16   13    13
   7E |    9   19   12   13   14    7   15    8   10   10    4 |    66   63   64   59   62   63   62   62   60   63    62
   8  |   13   24   10    8   16    4   10   10   14   14    5 |    20   32   20   25   24   19   29   21   22   20    21
   9E |   15   19   15   11   18    7   18   14   14   29    6 |    52   52   51   49   47   50   48   58   57   54    51
  10  |   10   12    7   10   10    7   11    9    9   32    4 |    16   15   19   22   21   17   24   22   21   34    19
  11E |    6   22    9    9   12    4    8    9    6   13    4 |    52   57   55   54   52   52   52   48   52   47    51
  12  |   10   22   14   14   21    7   15   11   10   18    5 |    12   28   21   28   24   16   24   18   17   15    16
  13  |    6   20    9   11   21    5   10    8   10   10    4 |    17   29   21   23   34   17   25   22   20   15    19
  14  |    9   27   12   12   17    5   12   10   10   12    5 |    14   26   18   29   29   15   23   21   20   13    19
  15  |    7   21   11   12   17    4   15    8    8   19    4 |    13   23   19   22   24   12   20   18   14   18    14
  16  |    9   25   12   14   15    5   14    8    7   29    5 |    11   27   15   20   25   12   23   10   14   14    13
  17  |    6   21   14   12   17    5   19   11   10   14    5 |    14   26   16   21   24   11   26   15   13   18    14
  18  |   12   17    8   16   13    6   13   14    6   27    5 |    16   27   23   36   24   21   26   24   19   17    21
  19  |    8   19   13   12   17    5   12   10   12   19    5 |    12   24   15   17   18   11   20   16   17   17    12
  20  |   10   17    8   16   11    4   13    9    9   24    5 |    27   29   26   32   25   25   28   30   25   30    26
  21  |    6   23   12   14   17    5   14   10   10   14    5 |    27   41   29   34   38   25   39   21   27   19    28
  22  |   10   18   12   14   10    4   14   15   11   24    5 |    22   28   25   35   29   24   30   30   24   23    25
  23  |    6   24    9   13   15    6   14   10   10   19    5 |    18   31   21   22   26   18   24   23   21   18    19
 X24  |    5  ---  ---  ---  ---   18  ---  ---  ---  ---    0 |    24  ---  ---  ---  ---   22  ---  ---  ---  ---    26
  25  |    9   13    8   10   19    4   16   11    6   13    4 |    22   27   24   24   35   19   31   23   18   19    22
 X26  |    9   15   12   12   12   12   14   13   19  ---    5 |    17   20   16   24   21   17   21   20   28  ---    18
 X27E |    5  ---  ---  ---  ---   60  ---  ---  ---  ---    0 |    32  ---  ---  ---  ---   22  ---  ---  ---  ---    37
  28  |    9   16   15   10   13    5   15   10   11   16    4 |    14   26   25   23   28   15   30   17   17   14    18
  29  |    7   22    8   13   15    5   16   12   11   13    5 |    13   22   12   21   17   11   23   16   13   16    12
  30  |    8   13    9   15   13    7   10    8    9   15    4 |    11   16   16   20   20   14   19   13   17   16    14
  31E |   10   16   12   12   15    4   18   10   11   13    5 |    32   37   33   35   35   32   34   37   35   39    34
  32  |   10   19   10   11   13    5   15    9   16   25    5 |    16   20   14   20   18   14   20   25   20   22    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19   11   13   15    5   14   10   10   19      |T   22   29   25   28   28   21   29   24   24   24    23
 WRMS |    9   19   11   12   16    5   14   10    8   19      |NE  17   26   21   25   25   17   26   20   20   19    19
 MEDI |    9   19   10   12   15    5   14   10   10   16      |MD  16   27   21   24   24   17   25   21   20   18    19

Table 3.1676.4   GPS week: 1676   Day: 4   MJD: 55980.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6   20   11   11   15    7   13   12   13   21    5 |    44   49   41   43   42   42   46   37   50   37    41
   2  |   12   21    9   12   16    4   12    8   11   18    5 |    30   39   30   32   34   31   36   31   32   33    32
   3  |    9   15   10   10   15    5    9    8   12   13    4 |    19   26   15   22   27   19   24   19   23   18    18
   4  |    9   16   10   10   15    6   12   13   11   16    4 |    30   36   30   32   31   31   37   32   31   33    32
   5  |   10   13   11   14   12    4   17    8   10   26    5 |    21   27   24   34   26   25   30   28   26   30    24
   6  |    9   15    9   11   14    5   10    8   13   16    4 |    20   25   17   23   26   19   25   21   24   20    20
   7E |    8   18   12   12   14    7   16    6    9   11    4 |    39   45   36   38   43   38   44   42   40   39    39
   8  |   11   20   12    9   17    6   12   11   10   11    4 |    19   32   24   27   26   21   30   24   24   20    22
   9E |   16   20   16   11   15    6   19   17   16   25    6 |    52   52   50   50   48   54   49   60   55   51    50
  10  |   10   11    9   10   13    5    9    7   10   30    4 |    20   21   20   27   23   22   24   24   23   35    21
  11E |    7   20    9    9   11    5   10   10   13   16    4 |    39   45   37   39   41   39   40   36   48   35    38
  12  |   10   23   12   13   15    5   15   10    9   18    5 |    23   35   24   28   27   26   28   26   31   25    24
  13  |    7   20   10   10   20    6   12    9   12   10    4 |    18   31   20   20   36   18   29   24   17   18    19
  14  |    9   21   11   10   14    5   13   10    8   14    4 |    17   28   20   30   33   23   25   25   21   22    22
  15  |    8   22   14   11   16    6   16    9   10   19    5 |    20   30   22   29   28   21   26   21   22   24    20
  16  |    9   23   11   12   15    6   14    7   11   29    5 |    20   28   16   25   32   19   27   19   22   18    20
  17  |    8   19   13   13   16    4   18   12   14   11    5 |    25   34   22   26   32   22   32   27   22   24    25
  18  |   14   19   10   13   13    6   14   12    7   30    5 |    22   32   23   35   28   25   30   30   30   25    26
  19  |    9   22   15   11   18    5   11   12   14   18    5 |    22   32   18   21   25   21   26   23   28   27    20
  20  |    9   19   13   12   12    4   13   10    8   23    4 |    24   30   23   25   28   25   25   28   27   31    25
  21  |    9   21   11   11   16    5   15    9   10   14    4 |    28   38   28   30   37   27   35   27   27   20    28
  22  |   11   17   16   11    8    6   14   13   10   24    5 |    24   31   24   35   33   27   33   33   32   26    28
  23  |    8   27   10   12   14    5   15    8   10   19    5 |    18   32   16   20   28   17   26   22   14   18    17
 X24  |    7  ---  ---  ---  ---   27  ---  ---  ---  ---    0 |    26  ---  ---  ---  ---   23  ---  ---  ---  ---    26
  25  |    9   14   12   12   15    5   15   12   10   14    4 |    25   33   26   26   36   26   33   31   31   28    27
 X26  |    9   12   10   14   15    8   11   14   20  ---    5 |    18   23   19   26   27   21   24   22   31  ---    20
 X27E |   29   43   20   12   19   12   18   19   18  ---    9 |    28   45   18   24   31   29   23   23   32  ---    36
  28  |    6   16   14    9   12    5   12   10   10   15    4 |    23   33   21   27   34   24   35   26   24   21    25
  29  |    9   21   12   14   14    5   19   14   11   11    5 |    24   33   22   24   29   24   32   30   28   29    25
  30  |    9   13   10   10   16    4   10    9   13   14    4 |    17   22   15   24   28   17   22   22   26   17    19
  31E |    9   19   13   13   15    7   16    9   13    8    4 |    35   42   38   36   44   39   42   41   38   38    37
  32  |   11   19    8    9   13    5   16   11   10   27    5 |    21   25   16   19   23   20   22   27   22   26    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   19   12   11   15    5   14   10   11   19      |T   25   33   24   28   31   26   30   28   29   27    26
 WRMS |    9   19   12   12   14    5   14   10    9   18      |NE  22   30   22   27   29   23   29   26   26   25    23
 MEDI |    9   19   11   11   15    5   14   10   11   16      |MD  23   32   22   27   31   24   30   27   27   26    25

Table 3.1676.5   GPS week: 1676   Day: 5   MJD: 55981.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    9   24    9   10   21    5   13   11   11   21    4 |    38   45   33   35   44   34   39   32   36   33    33
   2  |   11   19    6   10   16    5   13   11   10   11    4 |    27   33   23   24   33   25   26   24   22   24    22
   3  |   10   19    6   11   14    4    9   10   13   16    4 |    22   33   23   26   29   24   27   23   25   23    22
   4  |    8   17    8   11   13    8   16   15   11   19    4 |    36   37   35   29   28   34   33   27   32   26    29
   5  |    9   14    6   12   10    6   17    9   10   25    4 |    19   25   19   27   23   19   25   23   19   21    18
   6  |    9   15    5   11   14    4    9    9   13   18    3 |    20   29   23   26   27   23   27   22   27   23    21
   7E |    9   17    8   13   14    4   19    7   11   10    4 |    23   30   25   23   30   23   30   24   25   24    21
   8  |   12   24    7   11   19    6   12   12   13   13    4 |    19   34   25   25   22   19   28   22   17   23    19
   9E |   20   18    8   12   20    8   21   22   21   23    6 |    49   48   47   48   42   47   45   57   53   41    46
  10  |   10   10    6   10   11    6    9    9    9   30    4 |    21   20   21   25   24   19   21   20   20   34    19
  11E |   10   14    6    7   13    5   13   14    8   16    3 |    31   39   34   33   41   32   35   32   30   31    32
  12  |   12   21    9    9   15    6   18   10    7   19    4 |    17   30   18   22   25   18   26   16   16   15    16
  13  |    7   22    8   10   21    5   12    9   11   10    4 |    15   27   21   20   38   15   26   21   19   17    18
  14  |   10   23    9   12   17    5   12    9    9   17    4 |    17   27   22   27   34   19   26   22   17   21    19
  15  |    9   20   12   12   15    5   19   10   10   24    4 |    13   24   20   23   25   15   21   15   18   16    14
  16  |    9   21    9   12   15    7   17    9   12   28    4 |    16   30   22   24   24   18   27   20   18   23    17
  17  |    8   23    7   14   13    6   21   13   14   14    4 |    19   32   18   24   28   18   31   18   22   20    18
  18  |   13   18    6   14   16    6   14   16   11   32    5 |    16   23   19   30   24   19   22   19   18   20    17
  19  |   10   23    6    9   16    5   15   11   13   19    4 |    21   34   20   22   25   22   26   25   25   27    20
  20  |    9   19    8   18   11    7   17    9   14   31    5 |    27   30   28   29   27   25   27   28   31   37    26
  21  |    8   20    9    7   19    4   14   12   13   13    4 |    23   37   28   31   37   24   34   21   29   21    25
  22  |   11   18    7   10   12    4   12   14   11   24    4 |    23   29   24   30   31   25   30   27   22   22    23
  23  |    7   24    6    9   18    5   15    8   12   17    4 |    17   28   21   21   30   17   23   19   21   17    18
 X24  |    8  ---  ---  ---  ---   37  ---  ---  ---  ---    0 |    38  ---  ---  ---  ---   18  ---  ---  ---  ---    37
  25  |   10   13    7   12   15    3   15   10    8   15    4 |    20   27   23   20   31   21   33   21   21   22    20
 X26  |    9   13    7   11   10    4   15   16   11  ---    4 |    18   20   21   23   22   18   21   19   19  ---    15
 X27E |   19   19    8   11   21   10   18   22   27  ---    7 |    25   23   14   20   22   20   23   23   30  ---    22
  28  |    7   19    8    9   11    5   16    9   11   18    4 |    18   33   21   21   31   21   31   21   21   20    19
  29  |    8   20   10   12   12    3   20   13    7   14    4 |    18   27   19   21   22   17   28   18   20   18    17
  30  |   10   14    8   11   16    5   10   11   12   15    4 |    14   25   19   22   22   18   22   19   19   21    16
  31E |    8   25   11   12   14    6   20   13    7   14    4 |    21   39   24   21   32   22   30   24   21   24    22
  32  |   12   18    6    8   12    7   16   13   12   31    4 |    20   24   22   19   25   20   23   31   21   32    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   19    8   11   15    5   15   12   11   20      |T   22   30   23   25   28   22   27   23   23   24    21
 WRMS |   10   19    8   11   14    5   15   11   10   20      |NE  21   29   22   24   28   20   27   22   22   23    20
 MEDI |    9   19    8   11   15    5   15   11   11   18      |MD  20   30   22   24   28   20   27   22   21   23    20

Table 3.1676.6   GPS week: 1676   Day: 6   MJD: 55982.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   23   10   10   17    5   12   12   10   27    4 |    53   58   47   53   58   51   56   44   53   46    49
   2  |    9   22    7   12   17    4   13   12   10   12    4 |    37   46   37   36   45   36   41   35   32   34    35
   3  |    9   15    5   10   15    4   12    9   14   15    3 |    26   29   22   29   31   25   33   26   27   26    24
   4  |    8   19    6   11   13    5   11   19   11   17    4 |    31   38   31   34   35   29   41   30   26   34    31
   5  |    6   20    8   11    9    5   18    9   10   29    4 |    30   32   28   39   34   30   35   32   31   35    30
   6  |    6   14    4    8   15    3   11    8   11   18    3 |    28   31   24   32   33   27   38   28   28   28    27
   7E |    8   21   10   14   13    4   19   13    7   12    4 |    51   60   56   54   56   54   55   56   54   54    53
   8  |   14   20    8   12   21    4   13   12   12   13    4 |    25   33   27   31   23   23   31   26   24   26    24
   9E |   18   20   11   14   17    7   19   24   18   26    6 |    57   54   55   53   50   53   53   63   56   49    53
  10  |    8   12    5   11   11    5    9   16    8   37    4 |    24   23   24   35   29   25   27   27   29   40    25
  11E |   10   17    6   11   10    4   11   10    8   17    3 |    52   53   51   57   55   51   53   48   54   45    51
  12  |   12   23    8   10   14    4   17    8   10   22    4 |    19   31   21   26   28   21   28   18   22   19    18
  13  |    6   20    8   10   20    4   14    9   14   12    4 |    21   28   23   24   36   21   29   25   29   23    22
  14  |    7   22    6   12   14    6   15   10   11   19    4 |    20   28   22   32   35   22   26   26   23   24    22
  15  |    7   21    7   12   13    3   20   13    7   23    4 |    17   27   19   30   28   17   24   20   15   21    17
  16  |    7   25    6   10   12    4   17    9   11   26    4 |    22   29   18   28   30   21   30   22   20   23    21
  17  |    7   22    9   15   11    7   19   12   12   13    4 |    27   35   27   30   34   25   37   26   28   25    26
  18  |   10   21    8   17   11    4   14   16   12   38    5 |    25   33   26   42   33   27   31   31   29   29    27
  19  |    7   24    7   11   12    6   18   12   11   18    4 |    28   33   21   29   31   24   32   28   27   29    23
  20  |    7   19    8   13   10    5   17   10    7   31    4 |    31   30   29   34   29   29   32   36   31   39    30
  21  |    7   22    6    9   19    4   13   11   11   14    4 |    31   43   34   35   44   33   39   29   34   26    32
  22  |   10   18    7   13    9    4   13   15   13   26    4 |    28   33   32   41   37   31   34   36   33   29    31
  23  |    5   25    7    8   13    5   16    8   11   17    4 |    21   29   23   23   26   20   27   23   23   18    20
 X24  |    9  ---  ---  ---  ---   26  ---  ---  ---  ---    0 |    25  ---  ---  ---  ---   24  ---  ---  ---  ---    24
  25  |    9   17    8    9   11    4   15    8    6   15    3 |    25   28   27   25   35   24   34   23   24   22    24
 X26  |    9   14    6    9    9    4   15   12   14  ---    4 |    21   22   21   30   25   21   23   23   23  ---    21
 X27E |   16   21   10   12   19    7   19   23   25  ---    6 |    24   23   19   23   27   24   25   20   29  ---    27
  28  |   10   20    7   12    8    3   16    9   13   21    4 |    23   35   26   31   34   25   36   26   26   25    25
  29  |    7   20    7    8   11    4   20   11    9   16    4 |    21   30   22   26   30   24   32   23   27   26    22
  30  |    7   13    6   11   15    4   16   10   13   14    3 |    21   24   19   26   27   21   31   23   23   20    21
  31E |    8   21    8   11   15    3   23   10   11   10    4 |    36   40   37   33   46   35   43   38   38   37    36
  32  |   11   22    6    8   10    5   18   14    8   30    4 |    20   20   17   23   23   20   24   29   22   29    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20    7   11   14    5   16   12   11   22      |T   28   34   28   33   35   28   34   30   30   30    28
 WRMS |    8   20    7   12   12    5   16   11    8   19      |NE  25   31   25   31   32   25   32   27   27   27    25
 MEDI |    8   20    7   11   13    4   16   11   11   18      |MD  25   31   26   31   33   25   32   27   28   28    25



Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the estimated 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.
         Units: mm.

Table 4.1676   GPS week: 1676   MJD: 55976.0-55982.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3032 |U    5     6    14 |U   10    11    36 |U   32    18    43 |
emr | emr 2943 |    16    20    23 |U   10    11    37 |    31    19    41 |
esa | esa 2962 |     9    14    18 |U   10    10    32 |    29    18    37 |
gfz | gfz 2940 |    18    19    22 |U   12    14    43 |U   28    19    40 |
grg | grg 2947 |     9    14    19 |U   11    11    39 |    31    21    42 |
igr | igr 2962 |     9    13    18 |    10    10    35 |    26    17    36 |
igs | igs 2961 |     9    13    17 |    10    10    34 |    31    19    41 |
jpl | jpl 2955 |    10    15    22 |U   11    11    39 |U   28    22    43 |
mit | mit 2962 |    12    15    23 |U   11    11    36 |U   31    22    44 |



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 estimated coordinates 
         for the Latitude, Longitude and Height components.
        
         CLK  - Satellite clocks used.
         EPO  - Number of satellite clock epochs available for that day.
         Units: mm.

Table 5.1676.0   GPS week: 1676   Day: 0   MJD: 55976.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3040 |     6     7    17 |     7     8    24 |     7     8    17 |
emr | emr 2974 |     7     6    14 |     9     7    29 |     9    11    15 |
esa | esa 2976 |     5     5    15 |     7     7    23 |     6     8    15 |
gfz | gfz 2964 |     6     5    15 |    12    10    31 |     7     7    16 |
grg | grg 2969 |     6     5    17 |     8     8    31 |    12    13    17 |
igr | igr 2976 |     5     4    13 |     7     6    24 |     8     8    16 |
igs | igs 2976 |     5     5    12 |     7     7    25 |     7     8    14 |
jpl | jpl 2974 |     6     5    13 |     8     7    37 |     6     9    16 |
mit | mit 2976 |    10    11    26 |    11     7    37 |     8     9    19 |

Table 5.1676.1   GPS week: 1676   Day: 1   MJD: 55977.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3052 |     5     6    12 |    10    11    42 |   101    55   116 |
emr | emr 2972 |     7     7    12 |    10    10    42 |   103    63   115 |
esa | esa 2976 |     5     4     9 |    10    10    36 |   101    63   115 |
gfz | gfz 2966 |     8     4    10 |     9    10    42 |   100    67   117 |
grg | grg 2976 |     5     5    13 |    12    12    37 |   100    63   107 |
igr | igr 2976 |     5     4     8 |    10    10    44 |    99    65   115 |
igs | igs 2976 |     5     3     7 |    10    11    42 |   100    67   117 |
jpl | jpl 2972 |     5     5     9 |    11    13    38 |    97    75   122 |
mit | mit 2976 |     6     3     8 |    11    12    38 |    99    76   121 |

Table 5.1676.2   GPS week: 1676   Day: 2   MJD: 55978.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3041 |     7    11    14 |    10    10    38 |     7     7    23 |
emr | emr 2876 |    58    99    59 |    10    13    43 |     9     7    17 |
esa | esa 2976 |    27    67    52 |    10    12    37 |     5     6    16 |
gfz | gfz 2875 |    63   104    61 |    12    21    46 |     7     6    15 |
grg | grg 2880 |    27    65    46 |    12    12    42 |    10     6    19 |
igr | igr 2976 |    26    68    51 |    10    11    38 |     6     6    16 |
igs | igs 2976 |    27    67    52 |    10    12    38 |     5     6    15 |
jpl | jpl 2968 |    27    68    56 |    13    12    49 |     8    10    20 |
mit | mit 2976 |    27    67    51 |    12    13    37 |     6     7    17 |

Table 5.1676.3   GPS week: 1676   Day: 3   MJD: 55979.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2958 |     4     6    16 |    11    10    37 |     8     7    18 |
emr | emr 2876 |    18    10    31 |    10    10    37 |    11     9    26 |
esa | esa 2880 |     7     5    15 |    11    10    33 |     9     9    18 |
gfz | gfz 2874 |    11     5    16 |    14    15    49 |     9     9    22 |
grg | grg 2878 |    10     9    22 |    12    12    36 |    12    12    23 |
igr | igr 2880 |     7     5    14 |    11    11    36 |     9     9    19 |
igs | igs 2880 |     7     4    13 |    11    10    35 |     9     8    20 |
jpl | jpl 2876 |    11     6    17 |    15    10    47 |     9    10    22 |
mit | mit 2880 |     5     4    12 |    11    11    37 |     9     9    23 |

Table 5.1676.4   GPS week: 1676   Day: 4   MJD: 55980.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3061 |     4     3     9 |    13    15    41 |     6    12    12 |
emr | emr 2968 |     6     7    13 |    13    15    41 |     9     8    10 |
esa | esa 2976 |     4     5    11 |    12    14    35 |     9     7    13 |
gfz | gfz 2967 |    14     7    17 |    15    19    51 |     6     7    11 |
grg | grg 2976 |  ----  ----  ---- |  ----  ----  ---- |  ----  ----  ---- |
igr | igr 2975 |     5     5    12 |    12    14    35 |     6     9    10 |
igs | igs 2976 |     3     4    10 |    13    15    36 |     7     7    10 |
jpl | jpl 2966 |     7     4    16 |    15    15    35 |     7     6    11 |
mit | mit 2976 |     4     4    11 |    13    14    34 |     8     8    10 |

Table 5.1676.5   GPS week: 1676   Day: 5   MJD: 55981.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3046 |     5     6    12 |     9    10    36 |  ----  ----  ---- |
emr | emr 2968 |     6     7    15 |     9     9    34 |    18    12    20 |
esa | esa 2976 |     6     5    13 |     9     8    32 |  ----  ----  ---- |
gfz | gfz 2969 |    10     7    14 |    10    10    39 |    11    18    29 |
grg | grg 2976 |     6     5    16 |     9    10    42 |    12    13    15 |
igr | igr 2976 |     5     4    12 |     8     7    33 |     5     9    13 |
igs | igs 2975 |     6     4    11 |     8     8    32 |  ----  ----  ---- |
jpl | jpl 2966 |     5     5    17 |     8     8    35 |     5     9    17 |
mit | mit 2976 |    20     7    34 |     9     9    35 |  ----  ----  ---- |

Table 5.1676.6   GPS week: 1676   Day: 6   MJD: 55982.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3029 |     6     5    16 |     9    13    33 |    63    19    75 |
emr | emr 2968 |    11     8    18 |    10    14    30 |    61    22    82 |
esa | esa 2976 |     6     4    15 |     9    11    30 |    42    16    46 |
gfz | gfz 2969 |    11     5    19 |    14    17    43 |    59    16    72 |
grg | grg 2976 |     8     8    23 |    11    12    47 |    42    20    69 |
igr | igr 2976 |     7     4    16 |     9    11    34 |    50    16    63 |
igs | igs 2974 |     8     4    16 |     9    12    29 |    58    21    69 |
jpl | jpl 2968 |    12    10    28 |     9    13    31 |    65    36    94 |
mit | mit 2976 |    13     7    19 |     9    13    35 |    59    22    73 |


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                          
        Ypole,Yrt: y pole and y pole rate                       
        LOD      : Length Of Day                                               
                                                                              
        AC LOD BIAS    : 10-day mean LOD bias with respect to Bulletin A     
        AC LOD BIAS RMS: RMS of AC LOD BIAS                              
                                                                              
        FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
              for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 6.1676   GPS week: 1676   MJD: 55976.500-55982.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       2     -20      98     140      3 |       0     17
            |      21      18      42      82      4 |       2
emr   uuuuu |      -8      11     -85     116      4 |      36     40
            |      17      36      95     162      8 |       1
esa   uuuxu |     -48     -17      42    -345     -4 |      -4     14
            |      26      15      89      87      7 |       2
gfz   uuuuu |     -40       2      -9     -38      0 |       4     16
            |      34      12      59     117      4 |       1
grg   uuuux |      38     -10      34      37     -9 |       6     37
            |      17      11      51      77     32 |      17
igr   xxxxx |     -55      22      38     -85     -2 |       2     15
            |      23      14      55      69      6 |       2
irf   xxxxx |      -1     -12     -15     -17      1 |       2     17
            |      12       6      25      23     12 |       1
jpl   uuuuu |       8     -36      58     191      5 |      22     29
            |      27      11      60      64      9 |       2
mit   uuuuu |      -7     -13    -180    -168     -5 |      11     19
            |      20      16      68      59      5 |       3
ngs   uuuuu |     -20       4      50      18      3 |       3     17
            |      40      27      67      80     13 |       2
sio   uuuuu |      96      81     183    -130     -2 |      16     25
            |      18      19      72      71      6 |       4


Table 7.1676.0   GPS week: 1676   Day: 0   MJD: 55976.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      29     -18      67     142      2 |       0     15
emr   uuuuu |       1      19    -146     317     -8 |      37     40
esa   xxxxx |     -82     -28     140    -474     -7 |      -3     12
gfz   uuuuu |     -77     -19      52    -109     -2 |       4     14
grg   uuuux |      62       4      80     108    -11 |      31     62
igr   xxxxx |     -77       5      76    -208      2 |       3     14
irf   xxxxx |     -12     -11     -18     -48     11 |       1     16
jpl   uuuuu |     -13     -43     176     214      2 |      23     28
mit   uuuuu |     -23     -15    -275    -284     -8 |      13     19
ngs   uuuuu |       6       8      39      19     12 |       2     16
sio   uuuuu |      80      82      61    -218    -10 |      21     29

Table 7.1676.1   GPS week: 1676   Day: 1   MJD: 55977.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -20      -7      83     172      7 |      -2     16
emr   uuuuu |     -11     -22    -132     309      3 |      34     38
esa   xxxxx |     -85     -41       8    -403      0 |      -5     14
gfz   uuuuu |     -72      -4    -105    -181      3 |       3     15
grg   uuuux |      39     -15      48     126    -32 |      23     55
igr   xxxxx |     -81       5     -56    -126     -6 |       2     14
irf   xxxxx |     -20     -25     -51     -37     -1 |       0     16
jpl   uuuuu |     -19     -31      49     135      5 |      21     27
mit   uuuuu |     -36     -36    -261    -204     -5 |      11     19
ngs   uuuuu |      34      42     192      57     -1 |       1     16
sio   uuuuu |      76      66     137    -212     -5 |      19     28

Table 7.1676.2   GPS week: 1676   Day: 2   MJD: 55978.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      -7     -17     115     149      9 |       1     17
emr   uuuuu |      22       1      34     215     13 |      37     40
esa   xxxxx |     -53     -20     -19    -375      4 |      -2     12
gfz   uuuuu |     -72      17     -61    -145     -1 |       5     16
grg   uuuux |      48     -10     101      65    -37 |      13     44
igr   xxxxx |     -76      30      21    -100      1 |       4     14
irf   xxxxx |      -3      -6     -30     -21     -2 |       3     16
jpl   uuuuu |     -23     -50      71     123     10 |      24     30
mit   uuuuu |     -17      -9    -180    -157     -4 |      14     20
ngs   uuuuu |       2      -3      13      80     -1 |       3     16
sio   uuuuu |      94     109     146    -137      0 |      20     28

Table 7.1676.3   GPS week: 1676   Day: 3   MJD: 55979.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      26       6     136      67      3 |       1     16
emr   uuuuu |     -21      -3     -35      49     15 |      36     40
esa   xxxxx |     -26     -16     175    -343     -2 |      -3     12
gfz   uuuuu |     -17       6      19       5      5 |       4     16
grg   uuuux |      45     -10      50      72    -30 |      -4     19
igr   xxxxx |     -52      28       9     -43      3 |       2     14
irf   xxxxx |      -1     -10      13       1     -6 |       2     16
jpl   uuuuu |      12     -39     -15     152      0 |      23     29
mit   uuuuu |     -12       4    -134    -143     -5 |      12     20
ngs   uuuuu |     -36      -9      27      22     -4 |       3     16
sio   uuuuu |      79      89     254    -118      0 |      17     26

Table 7.1676.4   GPS week: 1676   Day: 4   MJD: 55980.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |     -24     -40     101     274     -2 |       1     16
emr   uuuuu |     -22     -30      -5     -71     -4 |      37     40
esa   xxxxx |     -31      -9     -75    -351    -14 |      -4     13
gfz   uuuuu |     -27       7     -33     -22     -5 |       4     16
grg   uuuux |      11     -27      17     -34    -23 |      -8     22
igr   xxxxx |     -31      17      41     -25    -14 |       2     14
irf   xxxxx |       5     -11      10      10     23 |       2     17
jpl   uuuuu |      22     -36      15     189    -12 |      22     28
mit   uuuuu |       4     -16     -89    -114    -14 |      11     19
ngs   uuuuu |     -45      37      -7      72     26 |       2     17
sio   uuuuu |     112      85     259     -35    -10 |      15     24

Table 7.1676.5   GPS week: 1676   Day: 5   MJD: 55981.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       8     -17      32     159      5 |      -1     16
emr   uuuuu |      -2      38     -68       5      6 |      34     38
esa   uuuxu |     -31      -9       2    -235      2 |      -8     15
gfz   uuuuu |      10      -4      32     158     -2 |       2     15
grg   uuuux |      41     -16     -19       6     20 |     -11     25
igr   xxxxx |     -25      45      60      -4      1 |      -2     14
irf   xxxxx |      16      -8     -30       6    -14 |       3     17
jpl   uuuuu |      44     -16      59     311     12 |      19     26
mit   uuuuu |      21      10    -182    -156      0 |       6     16
ngs   uuuuu |     -87     -26      75    -155    -15 |       4     18
sio   uuuuu |     114      90     201    -142      7 |       9     18

Table 7.1676.6   GPS week: 1676   Day: 6   MJD: 55982.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |       1     -45     153      14     -2 |       2     22
emr   uuuuu |     -25      75    -241     -15      5 |      37     43
esa   uuuxu |     -26       5      61    -234    -10 |      -4     19
gfz   uuuuu |     -22      14      36      29      3 |       5     20
grg   uuuux |      20       5     -39     -82     49 |      -5     30
igr   xxxxx |     -42      27     115     -90      1 |       1     19
irf   xxxxx |       6     -14       5     -28     -1 |       5     20
jpl   uuuuu |      32     -35      49     211     16 |      23     33
mit   uuuuu |      12     -28    -138    -116     -1 |       8     21
ngs   uuuuu |     -12     -24      12      32      1 |       6     20
sio   uuuuu |     116      49     224     -47      1 |      12     24



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