[IGSREPORT-20431] Wk 1666 IGS Final Orbits

Jim Ray igs.acc at noaa.gov
Thu Dec 29 04:58:26 PST 2011


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1666   (Dec 11, 2011 - Dec 17, 2011)

Contacts: J. Ray       (jim.ray at noaa.gov),
          J. Griffiths (jake.griffiths 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:

igs1666[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1666[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1666[0-6].cls  IGS GPS clock combination summary report.
igs16667.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16667.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  |  EMR   | IRKT
                0  |  ESA   | NNOR POTS TIXI UNSA
                0  |  GFZ   | 12 16 28 GMSD GUUG KOUC MDVJ OHI2 TLSE
                0  |  GRG   | BRST USN3
                0  |  JPL   | 25 30 AREQ KARR
                0  |  MIT   | 7 21 27 29 30 7 21 27 29 30 DAV1 NNOR NNOR
                1  |  COD   | 12 12
                1  |  ESA   | UNSA
                1  |  GFZ   | 12 16 28 BRFT BRUS GMSD KOUR NRIL OHI2 STHL TWTF
                1  |  GFZ   | WILL
                1  |  GRG   | AMC2
                1  |  JPL   | 30 AREQ BRUS
                1  |  MIT   | 27 30 27 30 BRUS DAV1 BRUS
                2  |  COD   | 16 27 16 27 HNPT XMIS
                2  |  EMR   | GRAZ WTZR
                2  |  ESA   | KOUR UNSA
                2  |  GFZ   | 28 BRFT CAS1 COCO KARR MDVJ TSKB
                2  |  GRG   | KOUR SANT USN3 USNO
                2  |  JPL   | 30 AREQ KARR
                2  |  MIT   | 16 21 27 30 16 21 27 30 DAV1 NICO SPT0 DAV1 IRKT
                2  |  MIT   | NICO SPT0
                3  |  COD   | BRUS NICO BRUS NICO WROC
                3  |  EMR   | 30 WTZR WTZR WUHN
                3  |  ESA   | WUHN CONZ KOUR MATE
                3  |  GFZ   | BOGT BRFT BRUS DGAR KARR MANA NICO OHI2
                3  |  GRG   | AMC2 KOUR NOVM SANT
                3  |  JPL   | AREQ KARR POL2
                3  |  MIT   | 27 30 27 30 CAS1 WTZR
                4  |  COD   | WROC WROC
                4  |  EMR   | 30 30
                4  |  ESA   | KOUR UNSA
                4  |  GFZ   | MANA WUHN
                4  |  GRG   | AMC2 KOUR
                4  |  JPL   | AREQ
                4  |  MIT   | 27 27
                5  |  ESA   | NICO KOUR NICO UNSA
                5  |  GFZ   | 30 ARTU KARR KELY KIRU MDVJ NYAL WUHN
                5  |  GRG   | AMC2 KOUR
                5  |  JPL   | AREQ
                5  |  MIT   | 3 6 27 30 31 3 6 27 30 31 DAV1 MAW1 WUHN DAV1 MAW1
                5  |  MIT   | SYOG WTZR WUHN
                6  |  COD   | KARR POTS XMIS
                6  |  EMR   | 30 30 WTZR WUHN
                6  |  ESA   | KOUR UNSA
                6  |  GFZ   | 30 BRFT KIRU MDVJ
                6  |  GRG   | AMC2 KOUR
                6  |  JPL   | 27 AREQ KOUR
                6  |  MIT   | 2 30 2 30 CAS1 MAW1 WTZR CAS1 CONZ HYDE MAW1

 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
               ----+------------+----------
               G25 | 2011_12_15 | 2011104 

 6. 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.
    

 7. 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  |     .4     .6     .0     -55     -9     32     .07
       EMR  |    3.6    5.1   11.9       4     13      8     .34
       ESA  |    6.8    5.1   -1.7      86   -183    108     .08
       GFZ  |    -.7    1.4    -.8     -54     18     -1     .29
       GRG  |    7.5    1.4   -4.9     -38     17      3    -.01
       JPL  |   -1.7    7.1   15.4      14    -45     73     .22
       MIT  |    8.4    4.8    1.2     -23     12    -25     .19
       NGS  |    7.6    1.0    -.7       5    -60     47     .25
       SIO  |    2.1    4.6    8.7      37    -16     -2     .16


 8. 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.

 9. 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.

10. 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 1.1666.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1666.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 2.1666.[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 3.1666.[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 5.1666.0-6).

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 1666 summary.                       (Dec 11, 2011 - Dec 17, 2011)

Table 1.1666.a   GPS week: 1666   MJD: 55906.000-55912.000

         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  255|    0     0     3    96   -54   -13  -.33    9    8 |     -49    -523     19     70
        |    0     0     0     8    20    13   .04           |     372     923
emr   94|   -1     1     8   -29   -90   -29   .36   19   19 |    2761     255     15     89
        |    1     1     1    44    27    16   .07           |     825     882
esa  132|    0     0     0   -97   170    30   .12    7    7 |     563    -377     14    131
        |    0     0     0    13    21    20   .05           |     655     918
gfz  194|    0    -1    -5   105  -115   -19   .27   12   12 |      16     -74     33    110
        |    1     0     1    48    46     7   .25           |     221     448
grg  124|    2     0    -8    52  -102     4   .62   16   15 |     278    -189     49    217
        |    1     0     1    20    24     9   .03           |     346     556
igr  n/a|    0     0     0   -14   -70   -31  -.18    5    5 |   -2211      78     20     77
        |    0     0     0    12    21    21   .08           |     810     829
jpl  125|   -2     0     5   -42    10    42   .51   14   14 |    3265     350     17     81
        |    1     0     2     9    25    36   .05           |    1333     820
mit  266|    2     0    -4    26  -117   -25  -.45   12   11 |       3    -256     22    151
        |    0     0     0    14    37    11   .06           |     267     448
ngs  214|    0     0    -1   -22    58    -7  -.34   10    8 |  -18201   23336   1641   3283
        |    0     0     1    35    27    18   .10           |   47728   62592
sio  247|    0     1     2   -90   -26    -7  -.19   17   16 |     ---     ---    ---    ---
        |    0     1     0    18    44    14   .02           |     ---     ---


Table 1.1666.b   GPS week : 1666   MJD: 55906.000-55912.000   

         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    6    5    5    6    6 |
   2  |    4    4    4    4    5    4    4 |
   3  |    4    4    4    4    4    4    4 |
   4  |    4    4    4    4    4    4    4 |
   5  |    4    4    4    4    4    4    4 |
   6  |    4    4    4    4    4    4    4 |
   7  |    4    4    5    4    4    4    4 |
   8  |    4    4    5    4    5    4    4 |
   9  |    4    4    4    4    4    4    4 |
  10  |    4    4    4    4    4    4    4 |
  11  |    4    4    4    4    4    4    4 |
  12  |    4    4    4    4    5    6    5 |
  13  |    4    4    4    4    4    4    4 |
  14  |    4    4    4    4    4    4    4 |
  15  |    4    4    4    5    4    5    5 |
  16  |    5    5    5    4    4    4    4 |
  17  |    5    4    4    4    5    4    4 |
  18  |    4    4    4    5    4    4    4 |
  19  |    4    4    4    4    4    4    5 |
  20  |    4    4    5    4    4    4    5 |
  21  |    4    3    4    4    4    4    4 |
  22  |    4    3    3    4    4    4    4 |
  23  |    4    5    5    4    5    6    5 |
  25  |    6    5    5    5    0    7    5 |
  26  |    4    4    5    4    4    5    5 |
  27  |    8    7    8    9    8    7    4 |
  28  |    4    4    6    4    4    4    4 |
  29  |    5    5    5    5    5    6    5 |
  30  |    8    8    8    8    7    7    8 |
  31  |    4    4    4    4    5    4    4 |
  32  |    5    4    5    4    4    4    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 2.1666.0   GPS week: 1666   Day: 0   MJD: 55906.000                            

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  255|    0     0     3    95   -64   -24  -.25    8    8 |     408   -1313     21     91
        |                     24    20                       |
emr   94|    0     1    11    -6  -111   -43   .47   18   18 |    2609   -1128     16    113
        |                    -14    -8                       |
esa  132|    0     0    -1   -91   138    46   .20    7    7 |     624   -1557     12    160
        |                     20    13                       |
gfz  194|    0    -1    -4    39   -79   -18  -.30   11   11 |     401    -784     33    118
        |                    -13    34                       |
grg  124|    1    -1    -8    58   -76     6   .65   17   16 |     796   -1088     42    208
        |                      3   -14                       |
igr  n/a|    0     0     0   -16   -82   -51  -.06    5    5 |   -2041   -1301     22     66
        |                     31    64                       |
jpl  125|   -4    -1     4   -47   -23    64   .61   14   14 |    2374    -943     20     96
        |                     62   -12                       |
mit  266|    1     0    -3     8   -48   -27  -.35   13   11 |     263    -754     22    154
        |                      1    10                       |
ngs  214|    0     0     0    30    34   -15  -.20   10    8 | -126438  165271   1600   3389
        |                   -116    17                       |
sio  247|    0     0     1  -118    63     0  -.17   19   18 |     ---     ---    ---    ---
        |                     44   -33                       |

Table 2.1666.1   GPS week: 1666   Day: 1   MJD: 55907.000                            

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  255|    0     0     4    99   -30    -8  -.35    8    8 |    -497     -22     18     75
        |                      9   -49                       |
emr   94|    0     1     9   -24   -44     1   .38   19   19 |    1525     657     18     94
        |                    -27   -68                       |
esa  132|    0     0     0  -116   188     5   .11    7    7 |    1212   -1089     16    191
        |                     38   -20                       |
gfz  194|   -2    -1    -4   137  -205   -23   .37   11   11 |    -214     -63     35    110
        |                    -36    22                       |
grg  124|    0    -1    -9    54  -103    -1   .67   16   15 |     224    -650     39    201
        |                     14   -44                       |
igr  n/a|   -1     0     0    -5   -63   -59  -.15    4    4 |   -3332     399     20     72
        |                    -34    33                       |
jpl  125|    0     0     5   -43    38    84   .51   14   14 |    1430     696     19     75
        |                     32   -46                       |
mit  266|    2     0    -5    27  -141   -32  -.44   11    9 |       0    -258     22    159
        |                    -24    39                       |
ngs  214|    0     1    -1   -31   101    25  -.25   10    8 |    -486     -97   1454   2703
        |                   -106   -44                       |
sio  247|    0     0     1  -106   -52   -28  -.19   17   15 |     ---     ---    ---    ---
        |                     52    15                       |

Table 2.1666.2   GPS week: 1666   Day: 2   MJD: 55908.000                            

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  255|    0     0     3    98   -25   -29  -.32    8    8 |    -130    -378     17     50
        |                     22   -41                       |
emr   94|    0     3     6    49   -75   -23   .34   24   23 |    2162     806     16     80
        |                    -94   -11                       |
esa  132|    0     0     1  -111   178    60   .11    7    7 |     895    -402     16    106
        |                     30   -21                       |
gfz  194|   -1    -2    -5    54  -149   -27   .35   13   13 |     216    -399     33    101
        |                    -25     3                       |
grg  124|    1     0   -10    44   -79   -12   .61   16   15 |     230    -172     61    203
        |                     26   -52                       |
igr  n/a|    0     0     0   -13   -63   -21  -.16    5    5 |   -2899     799     19     81
        |                      1    43                       |
jpl  125|   -1     0     1   -38    32    22   .54   14   14 |    2150     964     17     76
        |                      1   -41                       |
mit  266|    1     0    -3    14  -152    -7  -.42   11   11 |      53    -335     19    115
        |                    -20    51                       |
ngs  214|    0     0     1    12    88   -14  -.27   11    9 |    -145    -260   1399   3036
        |                    -78   -92                       |
sio  247|   -1     0     1   -92   -56    -5  -.18   17   16 |     ---     ---    ---    ---
        |                      9    20                       |

Table 2.1666.3   GPS week: 1666   Day: 3   MJD: 55909.000                            

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  255|   -1     0     4   100   -66     1  -.32    8    8 |       3    -939     17     61
        |                     25   -20                       |
emr   94|   -2     0     6   -36   -90   -46   .40   19   19 |    3112     472     16     85
        |                     24   -38                       |
esa  132|    1     0     0   -77   143    26   .14    6    6 |    -514    -510     13    109
        |                     16   -11                       |
gfz  194|    0    -1    -8    76   -83   -12   .37   13   14 |      53     -14     34    111
        |                    -35    13                       |
grg  124|    1     0    -9    39   -93    17   .59   16   15 |     312    -104     55    225
        |                     36   -50                       |
igr  n/a|    0     0    -1   -11   -98   -17  -.14    5    5 |   -1785     459     18     72
        |                      2    52                       |
jpl  125|   -1     0     5   -48     1     2   .49   14   14 |    3548     759     16     87
        |                     67   -17                       |
mit  266|    2     0    -3    44  -113   -28  -.44   12   11 |      25    -502     22    150
        |                    -24    30                       |
ngs  214|    0     0    -2    -5    37     0  -.36   11    8 |      -9    -899   1459   3236
        |                     14    38                       |
sio  247|    0     1     2   -78   -26   -11  -.18   14   15 |     ---     ---    ---    ---
        |                     35     6                       |

Table 2.1666.4   GPS week: 1666   Day: 4   MJD: 55910.000                            

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  255|    0     0     1   102   -54   -17  -.31    9    9 |    -401     960     26     78
        |                     20     3                       |
emr   94|   -1     1     9   -71   -89   -38   .36   18   18 |    4066    -894     15     84
        |                     24   -16                       |
esa  132|    1     0     0   -86   178    42   .14    6    6 |    -159    1047     19    127
        |                    -16   -28                       |
gfz  194|   -1     0    -4   149  -101   -21   .36   13   12 |     -83     682     37    114
        |                      7    -5                       |
grg  124|    1     0    -7    58  -102    10   .60   16   17 |     601    -176     54    251
        |                     14   -37                       |
igr  n/a|    0     0     0   -39   -66   -40  -.19    5    5 |    -805    -922     23     85
        |                     12    15                       |
jpl  125|   -3     0     7   -24     2    -6   .50   14   13 |    5212    -738     17     72
        |                     43    -6                       |
mit  266|    2     0    -4    25  -124   -22  -.46   11   11 |     337    -446     26    176
        |                     -7    47                       |
ngs  214|    0     0    -1   -55    40     0  -.42   11    8 |    -437    1066   1615   3435
        |                    -40     0                       |
sio  247|    0     1     3   -84   -46   -12  -.19   15   14 |     ---     ---    ---    ---
        |                     60    29                       |

Table 2.1666.5   GPS week: 1666   Day: 5   MJD: 55911.000                            

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  255|    0     0     3    77   -54   -24  -.36    9    9 |     467   -1829     18     73
        |                     34   -22                       |
emr   94|    0     1     6   -85   -87   -31   .32   19   19 |    2545     940     17    103
        |                     25    -6                       |
esa  132|    0     0     0  -101   192    21   .06    7    7 |    1140     615     15    115
        |                     42   -21                       |
gfz  194|    0     0    -5   164  -104    -8   .37   10   10 |    -143      40     32    105
        |                    -41   -15                       |
grg  124|    3     0    -8    25  -108     9   .65   16   14 |      45     260     49    236
        |                     19    -9                       |
igr  n/a|    0     0    -1     1   -32     1  -.30    6    6 |   -2367     546     20     86
        |                     -8    12                       |
jpl  125|   -2    -1     7   -41    37    52   .47   14   14 |    3867     804     16     76
        |                     10   -34                       |
mit  266|    3     0    -5    47  -150   -15  -.49   14   13 |    -202    -163     29    156
        |                    -37    40                       |
ngs  214|    0     0     0   -65    67   -29  -.44   10    8 |     316   -1614   1730   3218
        |                     27   -73                       |
sio  247|   -1     2     2   -62   -61    18  -.20   17   18 |     ---     ---    ---    ---
        |                     26    11                       |

Table 2.1666.6   GPS week: 1666   Day: 6   MJD: 55912.000                            

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  255|    0    -2     4   103   -84     6  -.36    9    9 |    -198    -142     16     66
        |                     28    27                       |
emr   94|   -3     0    10   -33  -133   -24   .26   19   19 |    3312     933     12     69
        |                     -4     9                       |
esa  132|    1     0     0   -96   173    11   .07    6    6 |     743    -744     12    110
        |                     16   -41                       |
gfz  194|    0    -1    -2   118   -81   -27   .37   10   10 |    -115      15     28    115
        |                    -53   -23                       |
grg  124|    3     0    -7    89  -149    -1   .58   15   14 |    -256     604     45    201
        |                    -15     3                       |
igr  n/a|    0     0    -1   -14   -90   -30  -.24    5    5 |   -2248     567     20     77
        |                     -5    12                       |
jpl  125|   -1     1     6   -54   -14    77   .46   14   14 |    4280     914     15     88
        |                     24   -65                       |
mit  266|    1     1    -4    16   -89   -44  -.55   15   14 |    -451     665     19    147
        |                     -5    32                       |
ngs  214|    0     0    -3   -39    39   -22  -.42   10    8 |    -212    -110   2235   3964
        |                     -3   -43                       |
sio  247|   -2     4     2   -87    -2   -17  -.24   21   18 |     ---     ---    ---    ---
        |                     58    35                       |

       
       
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 3.1666.0   GPS week: 1666   Day: 0   MJD: 55906.000                            

        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  |   11   15    5   19   15    6   23    9   11   37    5 |    61   68   65   68   74   67   74   68   69   52    64
   2  |    7   14    6   10   16    5   12   11    9   28    4 |    43   45   43   43   46   42   43   44   42   44    42
   3  |   10   14    4   10   15    4   10   21    6   12    4 |    19   20   16   21   24   16   20   21   18   15    15
   4  |    7   11    5    9   14    5    9   12   10   33    4 |    45   45   46   46   53   46   46   46   44   46    44
   5  |    8   23    5   11   18    5   11    9    8   14    3 |    23   37   23   19   26   22   28   24   21   23    19
   6  |    4   14    5   12   12    5    9   14   10   13    3 |    25   25   24   29   31   24   27   27   25   24    23
   7  |    5   17    9   10   23    4   13   18    5   11    4 |    20   29   22   20   32   19   26   24   20   21    18
   8  |    9   14    7    9   17    5   10    9    7   26    3 |    15   23   16   17   20   15   23   18   16   31    14
   9  |    6   17    6    7   14    4   13    8    9   17    3 |    22   27   22   18   27   19   29   22   20   21    19
  10  |    7   14    8    8   16    4   14   10    9   19    3 |    25   27   20   17   24   21   27   22   21   24    19
  11  |    7   16    6   14   11    4   12    9   10   25    4 |    50   57   58   58   66   56   58   57   58   45    55
  12E |    8   19    9   10   12    4   16   14    8   12    4 |    46   47   44   44   45   41   43   39   46   40    42
  13  |    6   19    5    9   26    3   11    8   10    8    3 |    22   29   25   25   41   22   31   19   27   20    22
  14  |    6   19    7    8   17    6   11    8    9   12    3 |    22   27   22   20   35   22   28   21   20   20    21
  15  |    9   18    5    9   21    7   18   10   12   11    4 |    31   36   34   36   41   29   39   33   30   29    30
  16E |    7   20   10   12   15    3   13   22   12   14    4 |    20   26   20   21   22   21   21   28   23   23    19
  17  |    9   22    8   11   12    5   17   19    8   28    5 |    59   62   58   54   53   55   58   54   57   57    54
  18  |    8   23    6   10   17    3   12   13   10   15    4 |    20   38   25   13   30   20   28   20   19   21    20
  19  |    8   21    7   11   12    4   17   10    6   21    4 |    21   29   23   24   25   21   26   25   21   25    20
  20  |    8   16    7   14   18    4   12   13   11   19    4 |    21   28   20   18   25   16   24   17   15   24    15
  21  |    6   13    3    9   12    4   10    8   12   21    3 |    41   50   47   44   47   43   48   45   41   41    43
  22  |    8   21    6   10   17    5    8   13   10   16    4 |    25   34   22   16   32   21   27   21   21   23    20
  23  |    6   21    6    9   24    6   19    9    9   12    4 |    30   39   29   29   40   31   37   29   28   31    28
 X25E |   10   27    8   20   15    9   19   12   16  ---    5 |    12   28   14   23   17   12   17   11   20  ---    10
  26  |   14   16    6   14   14    5   12    9   13   15    4 |    25   26   22   28   27   21   23   26   24   23    20
 X27  |   16   27   12   28  ---   13   16   16  ---  ---    8 |    20   35   26   30  ---   21   25   19  ---  ---    17
  28E |    7   14    7    7   17    4   12   16    8   14    3 |    21   23   20   17   25   18   22   19   16   19    16
  29  |   10   28    9   11   14    6   15   10   13   23    4 |    22   34   24   25   26   20   26   19   23   19    19
 X30E |   17  ---   13  ---   16   10   19   14  ---  ---    7 |    19  ---   20  ---   24   20   22   17  ---  ---    16
  31  |    6   19    7    8   21    4   13   12    9   12    4 |    20   31   23   22   34   21   30   19   25   20    21
  32  |   11   22    9    9   16    4   19   10    9   16    4 |    18   24   14   16   16   15   24   20   15   16    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   18    7   11   17    5   14   13   10   19      |T   27   34   28   28   34   27   32   28   28   28    25
 WRMS |    8   18    7   11   16    5   14   11    8   18      |NE  28   35   29   28   35   27   33   29   28   28    26
 MEDI |    8   18    7   10   16    5   13   11    9   15      |MD  22   29   23   23   30   21   27   22   23   23    20

Table 3.1666.1   GPS week: 1666   Day: 1   MJD: 55907.000                            

        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  |   11   14    6   18   13    6   22    6    9   25    4 |    32   40   37   40   46   36   49   37   35   28    35
   2  |    6   13    6    9   13    4   13   10   11   26    4 |    23   23   23   24   24   25   22   26   28   22    22
   3  |    8   11    5   10   18    4    9   22   10   10    4 |    12   16   11   18   18   13   13   19   19   12    11
   4  |    7   12    5    8   12    6   12   12   12   24    3 |    26   31   34   36   35   33   32   30   37   28    31
   5  |    5   21    8   12   15    3   13    9   10   13    3 |    15   25   18   19   24   16   21   20   18   17    14
   6  |    4   11    6   13   16    4    8   14   10   11    3 |    16   17   15   22   22   17   17   20   20   15    16
   7  |    6   17    5    9   21    3   12   13   10   12    3 |    17   29   19   28   33   18   25   22   19   20    18
   8  |   10   15    7   10   17    5   13    7   13   26    4 |    20   23   19   29   26   19   25   21   24   35    19
   9  |    8   20    4   10   14    3   14    9    9   17    3 |    13   23   11   18   16   13   20   16   14   16    11
  10  |   10   16    8   10   13    5   12    8    8   15    3 |    22   27   27   28   23   24   24   25   26   25    23
  11  |    6   16    3   17   13    5   11    8    9   18    3 |    28   34   29   32   40   30   33   30   30   22    28
  12E |    5   19    7    9   10    4   16   13   10   14    3 |    37   41   37   40   44   36   36   35   37   34    35
  13  |    6   21    5   10   23    4   11    7    6    9    3 |    14   23   17   25   41   16   23   13   15   13    15
  14  |    6   19    8   10   16    6   12    8    9   11    3 |    21   26   28   25   35   21   23   19   26   19    23
  15  |    8   17   10    9   18    4   22    9    8   11    4 |    20   23   14   25   30   18   29   21   17   20    16
  16E |    5   22    8   11   17    3   13   23   12   12    4 |    21   28   20   19   20   21   20   26   24   21    19
  17  |    8   19    7    9   16    5   17   10   11   19    4 |    26   30   30   33   27   27   29   26   27   24    26
  18  |    6   24    5   12   15    4   11   10   10   15    3 |    14   31   20   21   29   17   25   16   21   17    18
  19  |    5   23    8   11   14    4   17    9   10   19    4 |    14   28   16   20   17   13   21   16   15   19    12
  20  |    8   17    6   15   14    3   12   10   13   19    4 |    13   25   16   21   22    9   19   10   19   17    12
  21  |    5   14    5    9   10    4   11    8    9   18    3 |    24   35   32   31   32   27   33   28   32   24    28
  22  |    6   17    5   12   15    4    8    9    8   12    3 |    17   27   21   21   28   19   24   19   21   21    19
  23  |    9   24    7   11   21    4   16    9   15   11    4 |    23   31   24   30   36   22   27   23   28   23    23
  25E |    9   29    8   10   13    5   16   14   15   22    5 |    11   27   19   19   20   17   18   20   29   19    15
  26  |   12   19    8   13   16    4   13   11    9   11    4 |    20   26   20   26   24   19   21   27   27   24    19
 X27  |   14   27   13   24  ---   12   15    9  ---  ---    7 |    14   26   13   21  ---   14   18   15  ---  ---     9
  28E |    8   18    6   11   16    4   14   14    7   12    4 |    16   24   14   16   21   14   15   14   16   14    11
  29  |    8   25    7   15   14    4   14    8   12   22    4 |    13   31   19   26   23   17   23   18   24   17    16
 X30E |   16  ---   15  ---   17   17   20   13  ---  ---    8 |    17  ---   24  ---   20   20   19   15  ---  ---    16
  31  |    8   21    6   11   18    6   12    8   12   12    3 |    18   30   25   23   31   21   25   18   22   19    20
  32  |   11   22    6   11   18    3   16   10   11   16    4 |    11   20   13   17   10   10   19   17   14   12    10
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    7   11   16    4   14   11   10   17      |T   18   27   21   25   27   20   24   21   23   20    19
 WRMS |    8   19    7   11   15    4   14    9    8   15      |NE  18   26   21   25   27   19   24   21   23   20    18
 MEDI |    8   19    6   11   15    4   13    9   10   15      |MD  17   27   20   24   24   19   23   20   24   20    18

Table 3.1666.2   GPS week: 1666   Day: 2   MJD: 55908.000                            

        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  |   13   23    8   20   15    5   25    8   13   20    5 |    52   61   54   51   63   51   69   55   54   44    54
   2  |    7   14    8    8   12    5   11    7   11   27    4 |    27   28   31   30   28   29   30   27   32   30    28
   3  |    8   16    6   12   15    4   10   16   13   10    4 |    16   19   17   20   21   18   21   22   16   19    17
   4  |    7   15    7    7   13    7    8   12    9   24    3 |    33   36   35   40   41   35   37   31   36   28    34
   5  |    7   26    7   15   14    4   13    9   11   13    4 |    19   31   19   25   25   18   25   20   25   19    18
   6  |    5   15    5   15   13    5    9   12   15   10    3 |    21   24   22   23   27   23   26   26   22   23    22
   7  |    7   29    8   13   21    4   14    9   11   14    4 |    17   36   24   27   32   20   26   25   24   21    20
   8  |   12   20    9   11   18    7   10    9    9   29    4 |    19   25   22   29   26   18   26   23   26   36    20
   9  |    8   18    5    8   13    3   12    9   10   17    3 |    18   22   19   19   19   17   23   20   18   19    18
  10  |    9   17    9   13   12    7   10   12   11   16    4 |    20   27   27   30   23   21   26   20   22   25    22
  11  |    9   23   10   16   15    4   15    7    9   16    4 |    38   46   45   42   51   41   51   44   41   35    42
  12E |    5   20    6   11   11    5   14   10    9   19    3 |    31   32   31   35   35   33   35   31   37   28    30
  13  |    7   22    7   13   24    5   10    9    9   10    4 |    19   27   21   26   42   20   28   21   18   20    20
  14  |    6   21    8    8   15    4   12    9   14   12    3 |    18   27   25   25   33   21   25   19   22   19    21
  15  |    8   22    6   11   14    5   23    9   13   12    4 |    43   46   43   43   46   42   49   44   40   43    42
  16E |    7   22    8   15   16    4   16   16   10   17    4 |    18   25   22   22   23   19   22   26   23   25    20
  17  |    9   23    6   10   13    5   16   11    8   19    4 |    25   32   30   30   30   27   33   25   26   26    26
  18  |    6   27    7   15   15    5   13   13    9   15    4 |    20   35   27   25   33   23   29   20   23   21    23
  19  |    6   26    7   13   11    5   14   10   12   18    4 |    19   29   19   17   23   19   23   21   22   22    18
  20  |    8   23    8   15   17    3   15   11   11   16    4 |    19   28   24   23   26   17   23   18   17   19    18
  21  |    7   15    9   13   10    7   13   11   14   18    4 |    30   39   39   37   37   33   39   34   34   31    34
  22  |    6   19    5   11   18    4    8    7   10   10    3 |    18   25   22   23   33   20   25   18   16   19    19
  23  |   11   29   10   16   19    6   13    8    6    9    4 |    27   35   31   32   36   28   33   26   24   27    27
  25E |    7   32    8   14   25    5   13   12   13   18    5 |     9   26   17   21   23   14   18   14   22   19    13
  26  |   12   24    8   14   11    6   14   11   16   12    4 |    18   28   20   27   20   17   26   24   22   22    18
 X27  |   19   16   16   28  ---   10   11   11  ---  ---    8 |    15   19   23   24  ---   22   21   17  ---  ---    15
  28E |   11   49    5   13   20    5   13   19   11   17    5 |    24   61   28   30   29   25   29   31   26   31    26
  29  |    8   27    7   12   12    6   16   11   11   22    4 |    16   31   23   27   27   19   28   20   24   16    19
 X30E |   17  ---   14  ---   18   15   19   13  ---  ---    8 |    14  ---   17  ---   21   18   22   16  ---  ---    14
  31  |    7   22   10   11   19    4   11   13    8   13    4 |    14   28   24   22   32   18   24   18   20   18    19
  32  |   10   26    8   14   17    5   18    9   13   16    4 |    16   22   21   19   19   17   25   21   19   17    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   24    7   13   16    5   14   11   11   17      |T   22   31   26   28   30   23   29   25   25   24    23
 WRMS |    8   23    7   13   15    5   14   11    9   16      |NE  21   30   26   27   30   23   29   24   25   23    23
 MEDI |    8   22    8   13   15    5   13   11   11   16      |MD  19   28   24   26   28   20   26   22   23   22    20

Table 3.1666.3   GPS week: 1666   Day: 3   MJD: 55909.000                            

        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  |   12   16    6   22   15    7   26   11   10   15    5 |    55   66   60   64   67   63   73   64   60   58    59
   2  |    8   12    5   12   11    6   11   12   10   23    3 |    35   36   34   36   39   35   33   36   37   32    33
   3  |    9   14    4    9   18    3    9   19   14   12    4 |    17   21   15   19   24   15   17   18   19   14    14
   4  |    7   11    4   10   12    5    9   14    9   18    3 |    37   41   39   46   47   40   40   40   40   33    38
   5  |    7   22    5   10   13    3   11    8   11   11    3 |    18   30   19   18   27   16   22   19   15   18    16
   6  |    5   14    4   13   14    4    8   14   12   10    3 |    20   25   20   25   27   21   22   20   19   19    19
   7  |    6   17    7   10   21    5   13    7   10   12    3 |    21   29   24   27   36   19   25   21   18   17    19
   8  |   10   15    5   12   16    6   10   10   10   23    4 |    16   24   20   24   23   17   22   20   18   32    16
   9  |    8   15    6   14   16    4   13   15   10   14    4 |    20   26   23   22   23   18   25   25   17   18    18
  10  |   10   14    4   10   14    5   12   14   12   12    3 |    23   27   21   26   26   21   27   21   21   24    20
  11  |    7   16    6   15   11    3   13   12   12   13    3 |    43   50   46   50   56   47   49   47   46   41    45
  12E |    6   20    6   13   14    5   16   13    7   14    4 |    25   29   23   31   33   25   24   24   26   25    23
  13  |    6   18    4   12   25    6   10   11    9   10    3 |    17   25   18   26   42   18   25   18   17   16    17
  14  |    8   21    4   10   18    6   12    9   14   11    4 |    21   27   20   27   35   20   25   18   18   20    20
  15E |    8   21    7   22   15    7   23   14   10   12    5 |    28   35   28   28   37   26   35   33   22   35    26
  16E |    6   17    5   12   23    4   15    9   11   11    4 |    26   28   26   28   25   26   27   25   31   26    24
  17  |    9   18    7   13   13    5   18   12   11   16    4 |    23   28   23   30   28   24   27   27   24   20    21
  18  |    7   25    6   16   16    5   11   16    9   14    4 |    18   34   21   24   30   18   28   19   17   20    19
  19  |    7   25    8   10   10    4   16    9   10   19    4 |    20   31   19   17   23   16   24   19   19   20    16
  20  |   10   19    6   14   17    4   14   11    7   13    4 |    18   27   19   21   22   15   22   12   15   20    14
  21  |    7   15    6   11   13    4    9   10    6   17    3 |    39   46   42   45   46   40   44   39   36   35    39
  22  |    6   19    5   11   18    4   10   11   12   12    3 |    22   33   21   23   33   20   28   19   23   24    21
  23  |   10   19    5   13   23    6   14   10   11   10    4 |    23   31   22   25   37   21   29   22   24   22    21
  25E |    6   29    8   15   20    6   16   12    9   15    4 |    10   25   14   16   17   11   18   12   10   17    10
  26  |   13   20    7   12   12    5   12   12   12    8    4 |    24   33   23   25   28   21   26   25   22   24    21
 X27  |   14   25   11   30  ---   16  ---   19  ---  ---    9 |    22   25   30   33  ---   18  ---   19  ---  ---    19
  28E |    9   15    4   13   14    3   12   10    9    9    3 |    26   28   24   30   30   22   25   25   26   24    23
  29  |    9   26    8   11   13    3   17   15   12   21    4 |    19   32   23   27   25   18   26   17   18   18    18
 X30E |   16   34    9  ---   17    7  ---   15   28  ---    8 |    20   34   19  ---   25   18  ---   15   34  ---    17
  31  |    7   20    6   19   20    6   11   11    9   12    4 |    19   31   18   29   34   20   28   17   23   17    19
  32  |   10   18    6   11   18    4   17   11   12   12    4 |    16   20   17   18   16   15   23   16   20   15    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    6   13   16    5   14   12   11   14      |T   23   31   24   28   32   23   28   24   24   24    22
 WRMS |    8   19    6   14   15    5   14   11    8   15      |NE  24   31   25   29   32   23   29   24   24   24    23
 MEDI |    8   18    6   12   15    5   12   12   10   12      |MD  21   29   22   26   28   20   26   20   21   20    19

Table 3.1666.4   GPS week: 1666   Day: 4   MJD: 55910.000                            

        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  |   11   15    4   20   13    4   25    8    9   17    4 |    49   61   55   59   65   55   70   56   52   52    54
   2  |    7   12    5   24   13    5   12   13   12   23    4 |    28   29   27   40   29   28   28   31   31   29    28
   3  |    9   12    6   13   14    6    8   19   12   17    4 |    17   18   15   21   19   15   17   19   16   17    13
   4  |    9   12    6    8   12    6    8   11    8   18    3 |    32   34   37   40   39   35   35   36   33   26    34
   5  |    9   19    8   10   18    3   13   10   12   12    4 |    12   25   14   20   24   11   21   14   16   14    10
   6  |    4   12    6   15   13    5   10   15   13   13    4 |    17   23   21   25   26   20   24   21   18   21    18
   7  |    9   16    6    8   18    4   14    7    7   12    3 |    18   30   22   26   34   21   27   22   20   18    19
   8  |   11   17    7   10   17    5   11    9   13   23    4 |    15   27   20   26   24   19   26   22   26   34    19
   9  |    8   15    5   13   10    3   15   11    7   14    3 |    17   25   19   19   21   17   26   22   19   18    16
  10  |   13   14    5    7   13    5   10   11   11   12    3 |    16   19   15   20   18   11   22   12   17   17    13
  11  |    7   16    6   14   15    3   12    9   14   14    4 |    37   45   40   44   50   40   45   42   46   36    40
  12E |    8   19    5   14   28    5   18   13    9   19    5 |    19   25   21   23   33   19   22   21   25   23    19
  13  |    8   17    7   10   20    3   12    9    8   10    3 |    17   28   21   27   41   20   25   20   19   17    19
  14  |    6   16    9   13   15    8   11   12   10   11    3 |    17   24   22   24   32   16   22   17   19   20    19
  15E |    8   24    7   11   13    4   18   10   12   10    4 |    29   38   27   32   32   27   36   32   34   29    29
  16E |    6   17    7   12   12    4   13   10   10    9    3 |    19   26   18   22   22   20   25   23   25   23    20
  17  |    9   22    8   14   13    5   19   11    9   14    4 |    15   29   20   24   25   17   25   21   21   17    17
  18  |    7   25    7   10   18    4   12   12   10   15    4 |    13   31   22   22   30   17   29   16   19   19    18
  19  |    7   24    6   14   12    5   16    9   12   19    4 |    13   28   15   19   18   15   23   19   19   20    13
  20  |   11   19    6   10   19    3   12    8    9   16    4 |    15   26   16   21   26   12   22    9   13   18    13
  21  |    5   19    5    8   16    5   10   10    8   19    3 |    33   46   38   40   41   36   38   35   32   29    35
  22  |    7   15    4   10   17    4   11   10   11   11    3 |    14   27   16   23   29   14   25   15   16   20    16
  23  |   14   24    7   13   20    4   18    7   10   11    4 |    36   49   45   49   46   45   48   47   47   48    43
 X25E |    8  ---  ---  ---  ---  479  ---  ---  ---  ---    0 |     6  ---  ---  ---  ---  773  ---  ---  ---  ---     7
  26  |   13   17    6   15   11    5   11   10   13   10    4 |    13   23   14   21   19   13   19   19   24   14    13
 X27  |   11   25   12   32  ---   29   14   10  ---  ---    7 |    15   32   22   21  ---   17   28   19  ---  ---    13
  28E |   10   17    3   11   17    4   13   11   13   10    3 |    18   28   19   18   21   18   19   19   19   20    16
  29  |   10   28    7   10   14    7   16   16   13   23    5 |    15   34   20   26   28   17   24   20   22   17    18
 X30E |   18   23    9   13   15    7  ---   16   27  ---    7 |    19   26   15   14   23   21  ---   16   35  ---    17
  31  |    8   22    8   17   17    5   11    9   14   14    4 |    11   28   18   24   28   17   25   16   19   18    16
  32  |   11   16    9    8   21    4   16    8   11   14    4 |    11   20   13   16   17    9   21   14   12   13    10
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18    6   13   16    5   14   11   11   15      |T   19   30   22   26   29   45   28   23   24   23    20
 WRMS |    9   18    6   12   17    5   13   11    8   14      |NE  19   29   22   27   29   20   27   22   23   21    20
 MEDI |    9   17    6   12   15    5   12   10   11   14      |MD  17   28   20   23   28   18   25   20   20   20    18

Table 3.1666.5   GPS week: 1666   Day: 5   MJD: 55911.000                            

        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  |   10   17    7   16   13    7   26   10   13   29    5 |    37   51   45   39   55   41   59   44   44   35    42
   2  |    6   11    4   15   12    7   10   14    7   23    4 |    21   21   20   28   17   18   19   24   21   19    19
   3  |   11   15    7    8   14    8    8   12   11   14    3 |    13   21   15   12   16   13   15   15   20   14    13
   4  |    7    9    5    9   13    7    8   13    7   19    3 |    29   33   34   38   35   29   31   33   28   21    31
   5  |    7   20    7    9   16    4   14   10   14   15    4 |    14   25   17   20   26   16   23   16   22   15    15
   6  |    6   15    9    8   11    5    9   10   12   13    3 |    15   22   16   13   20   15   16   15   19   17    15
   7  |    6   19    8    8   15    6   11   10    9   17    3 |    15   29   21   23   28   15   23   20   17   16    17
   8  |   10   15    6   10   18    7   10   12   10   25    4 |    12   22   16   20   21   12   21   21   19   31    14
   9  |    9   19    6   10   14    6   13   14    8   14    4 |    21   26   23   22   22   18   27   24   21   20    21
  10  |   13   14    6    8   14    6   10   18    9   16    4 |    20   26   23   25   23   19   26   23   21   29    21
  11  |    8   15    7   11   14    5   13   14   12   19    4 |    29   37   32   31   42   32   34   36   39   27    32
  12E |   11   23    8   12   40    7   20   14   10   17    5 |    21   31   27   29   45   22   29   28   24   22    24
  13  |    5   17    5    9   19    7   13   13    8   11    3 |    15   26   18   23   37   16   23   21   17   17    18
  14  |    8   19    6    9   13    4   12   12   10   15    3 |    18   26   22   23   28   17   26   16   23   20    21
  15E |    6   23    9   11   13    6   20   11   13   13    4 |    16   25   19   19   22   19   27   20   18   17    16
  16E |    7   23    8   11   13    4   15   13    7   11    4 |    18   26   18   23   16   14   20   21   18   18    16
  17  |    7   18    7   10   14    5   15   13   10   14    4 |    20   28   22   25   28   17   25   22   18   18    19
  18  |    8   24    7    9   19    5   13   11    9   17    4 |    17   32   24   22   32   17   28   18   20   21    21
  19  |    4   22    8   10   11    6   18   13   10   20    4 |    13   26   15   14   17   14   21   16   18   18    13
  20  |   10   19    8   11   16    4   14   11    7   19    4 |    13   22   14   18   23    8   21   11   11   18    11
  21  |    7   15    7    7   12    4   10   12    8   21    3 |    26   33   33   32   34   24   34   30   23   23    29
  22  |    8   17    6    9   21    6   13   15    7   15    4 |    17   28   18   22   32   15   26   18   20   22    19
  23E |   20   24    9   14   17    6   19   20    9   17    5 |    62   68   65   70   69   60   65   49   63   51    60
 X25E |   13  ---  ---   13   17   15  ---   15   15  ---    7 |     6  ---  ---   14   15  114  ---   15   16  ---    11
  26  |   15   18    9   12   12    7   12   14   15   12    4 |    20   28   22   23   20   18   23   24   26   18    19
 X27  |   11   21    9   14  ---   11  ---   13  ---  ---    6 |    24   23   22   21  ---   20  ---   20  ---  ---    18
  28E |   10   16    7    7   13    6   12   16   11   12    4 |    17   28   22   23   26   15   22   22   17   20    18
  29  |   11   28   10    8   15    4   18   22   15   24    5 |    13   28   19   22   27   15   25   22   22   19    16
 X30E |   18   25   11   11   16    7  ---   21   24  ---    7 |    18   27   15   14   21   15  ---   15   28  ---    14
  31  |    8   19    8   10   16    4   12   15    8   12    4 |    16   26   22   21   31   14   25   17   17   17    18
  32  |   11   16    6    7   15    4   15   12    8   15    4 |    10   16   11   13   14    9   16   16   12   14    10
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19    7   10   16    6   14   14   10   17      |T   19   28   23   23   28   22   26   22   22   21    20
 WRMS |    9   19    7   10   14    6   14   13    8   18      |NE  18   27   21   22   27   18   25   21   21   20    19
 MEDI |    8   18    7   10   14    6   13   13   10   15      |MD  17   26   21   22   26   17   25   21   20   19    18

Table 3.1666.6   GPS week: 1666   Day: 6   MJD: 55912.000                            

        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  |   13   15    6    9   12    5   23   11   10   45    5 |    61   72   69   70   79   69   79   72   68   64    67
   2  |    7   13    4    8   11    5   10   16    8   26    3 |    41   41   43   43   43   41   41   44   41   42    41
   3  |   10   14    5   11   15    7   11   13    9   13    3 |    17   20   11   19   25   14   19   19   17   16    13
   4  |   10   12    3   10    8    7    7   15   11   28    4 |    43   48   49   54   54   48   47   47   49   39    47
   5  |    5   23    6    8   14    4   14   14   10   14    4 |    12   28   12   16   25   11   24   15   14   14    11
   6  |    6   14    4   12   14    6    9   14   11   14    3 |    17   23   16   23   30   18   23   21   19   19    18
   7  |    7   16    7   10   15    4   12   10    8   17    3 |    15   27   22   25   30   18   25   18   18   17    18
   8  |   12   14    5    9   15    4   10   12   10   26    4 |    12   25   19   23   26   17   26   21   20   32    17
   9  |    7   18    4    8   12    4   13   14   13   15    3 |    17   23   18   19   20   17   23   25   19   16    16
  10  |   10   15    4   10   11    6   11   19   11   20    4 |    18   26   21   30   23   22   28   25   22   33    22
  11  |    8   18    7   10   12    4   13   12   10   25    4 |    49   56   52   56   63   56   54   58   58   49    53
  12E |    9   22    6   13   17    4   20   14    7   16    4 |    30   36   27   34   39   29   36   32   31   28    29
  13  |    7   15    5    9   20    3   11   14    7   13    3 |    19   23   19   24   39   18   23   24   16   20    19
  14  |    8   20    5   10   22    5   14   12   10   13    4 |    17   24   21   26   39   18   26   21   19   20    20
  15E |    8   22    8   14   12    4   21   12   12   14    4 |    34   42   33   36   39   34   41   37   31   36    33
  16E |    7   25    6   12   16    6   13   13    9   13    4 |    19   32   24   23   28   19   26   27   20   24    19
  17  |    9   20    7   11   14    5   16   14    8   13    4 |    20   31   25   29   30   23   29   26   22   23    22
  18  |    7   21    6   12   18    4   14   13    7   20    4 |    17   32   19   24   29   17   30   18   16   22    18
  19  |    9   25    9   10   13    6   15   10   10   22    4 |    18   31   20   20   21   18   24   25   22   26    17
  20  |   11   16    8   10   16    4   14   13    9   26    4 |    16   23   14   19   22   11   25   13   15   30    12
  21  |    7   15    5    8    9    5    9   14   10   23    3 |    42   48   43   47   48   43   46   45   41   38    42
  22  |    7   18    5    7   18    5    9   16    8   15    3 |    13   27   17   22   30   13   25   19   15   22    16
  23E |   11   21    7   13   17    6   15   21   10   23    5 |    39   42   39   41   43   37   40   44   37   45    38
 X25E |    6   31    6    9   11    4   16   13    7  ---    4 |     7   21    4   14   18   90   15   15   14  ---    10
  26  |   14   25   10   10   15    6   13   15   10   17    4 |    18   28   18   26   21   18   25   25   23   26    18
 X27  |    7   18    5    9   11    5   11   13   10  ---    3 |    14   18   17   19    6   13   16   20    6  ---    13
  28E |    8   13    4    9   12    4   11   16   10   12    3 |    17   30   23   25   29   20   29   24   23   22    20
  29  |    9   27    7    9   12    7   17   26    9   24    5 |    18   32   20   22   26   19   26   24   23   22    18
 X30E |   17   28   10   16   16    8  ---   25   23  ---    7 |    18   30   18   14   26   17  ---   20   30  ---    15
  31  |    8   25    7   11   19    6   13   16    7   16    4 |    16   30   21   23   39   20   28   22   20   23    19
  32  |   11   18    6    8   15    5   17   19   12   18    4 |    12   18   10   15   16   11   20   20   12   16     8
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19    6   10   15    5   14   15   10   21      |T   22   31   24   28   32   26   30   27   25   28    23
 WRMS |    9   19    6   10   14    5   14   14    8   18      |NE  22   31   24   28   32   23   30   27   24   27    23
 MEDI |    8   18    6   10   14    5   13   14   10   17      |MD  18   30   20   24   29   18   26   24   20   23    18



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 4.1666   GPS week: 1666   MJD: 55906.0-55912.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2956 |U   21    27    42 |U   12    14    41 |U   12    13    21 |
emr | emr 2905 |U   24    26    59 |U   14    15    46 |    16    17    34 |
esa | esa 2948 |    22    28    46 |U   12    15    45 |    12    13    21 |
gfz | gfz 2904 |U   28    27    77 |U   14    15    50 |U   16    18    32 |
grg | grg 2879 |    24    32    62 |U   12    15    45 |    12    13    23 |
igr | igr 2955 |    19    25    41 |    12    14    41 |    12    13    21 |
igs | igs 2959 |    19    26    43 |    12    14    42 |    13    14    22 |
jpl | jpl 2860 |U   21    27    58 |U   12    15    42 |    15    18    35 |
mit | mit 2962 |U   17    21    47 |U   13    16    45 |U   17    18    32 |



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 5.1666.0   GPS week: 1666   Day: 0   MJD: 55906.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2968 |     9     8    22 |     9     9    29 |     8    10    16 |
emr | emr 2880 |    15    16    45 |    12     7    35 |    10    10    16 |
esa | esa 2976 |     7     7    19 |     9     9    32 |     8     8    12 |
gfz | gfz 2880 |    21    11    26 |    17    10    58 |    14    18    34 |
grg | grg 2880 |    17    14    49 |    10    11    35 |     8    10    15 |
igr | igr 2975 |     7     7    20 |    10     8    31 |     8     9    12 |
igs | igs 2975 |     8     8    30 |     9     8    31 |     8    10    13 |
jpl | jpl 2969 |     9     9    31 |     9    10    31 |    13    18    29 |
mit | mit 2976 |     8     8    25 |    18    17    37 |     9     8    15 |

Table 5.1666.1   GPS week: 1666   Day: 1   MJD: 55907.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2968 |    12    50    26 |    12    16    42 |     6    11    17 |
emr | emr 2879 |    14    20    42 |    14    15    42 |     9     7    22 |
esa | esa 2976 |    13    52    27 |    11    16    46 |     7     9    16 |
gfz | gfz 2880 |    32    22    66 |    19    20    68 |    18    18    29 |
grg | grg 2880 |    22    49    95 |    11    15    46 |     6    11    24 |
igr | igr 2954 |    13    50    25 |    11    16    41 |     6     9    17 |
igs | igs 2965 |    13    50    26 |    12    16    44 |     7    10    18 |
jpl | jpl 2968 |    29    29    85 |    12    19    43 |    12    17    42 |
mit | mit 2976 |    11    14    30 |    12    18    46 |    11    15    28 |

Table 5.1666.2   GPS week: 1666   Day: 2   MJD: 55908.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2967 |     8     6    21 |    12    16    32 |     5     5    12 |
emr | emr 2880 |    24    15    50 |    14    14    37 |    10     8    14 |
esa | esa 2976 |    14    12    30 |    11    17    35 |     8     6    15 |
gfz | gfz 2880 |    13    15    36 |    16    18    43 |    10    12    21 |
grg | grg 2880 |    17    25    39 |    11    19    36 |     9    10    17 |
igr | igr 2952 |    11     8    24 |    11    18    33 |     6     5    11 |
igs | igs 2967 |    14    14    32 |    12    17    33 |     7     6    12 |
jpl | jpl 2966 |    14    14    33 |    11    16    30 |    16    18    37 |
mit | mit 2976 |    18    17    43 |    11    16    34 |     9    10    21 |

Table 5.1666.3   GPS week: 1666   Day: 3   MJD: 55909.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2969 |    44    49   106 |    20    21    69 |     7     7    10 |
emr | emr 2972 |    44    51   104 |    22    22    66 |    17    26    41 |
esa | esa 2976 |    39    43   102 |    19    21    72 |     8     9    11 |
gfz | gfz 2880 |    39    46   100 |    19    20    66 |     6     7    12 |
grg | grg 2880 |    41    45   108 |    19    21    74 |    10    10    18 |
igr | igr 2975 |    23    34    86 |    19    21    67 |     7     7    14 |
igs | igs 2976 |    24    34    88 |    20    21    69 |     8     8    12 |
jpl | jpl 2784 |    28    45    83 |    19    21    68 |     8    10    13 |
mit | mit 2976 |    22    31    84 |    18    23    69 |     8    14    15 |

Table 5.1666.4   GPS week: 1666   Day: 4   MJD: 55910.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2871 |    14     9    27 |    17    17    60 |    44    46    62 |
emr | emr 2876 |    24    20    57 |    18    21    75 |    39    44    70 |
esa | esa 2880 |    19    15    40 |    17    17    73 |    39    35    55 |
gfz | gfz 2875 |    21    18    50 |    17    15    57 |    43    47    80 |
grg | grg 2780 |    20    16    44 |    18    17    65 |    32    29    43 |
igr | igr 2880 |    18    13    39 |    16    16    65 |    40    42    56 |
igs | igs 2880 |    17    13    29 |    17    17    70 |    44    44    64 |
jpl | jpl 2765 |    21    20    48 |    17    16    60 |    40    45    80 |
mit | mit 2880 |    19    15    47 |    17    19    65 |    58    55    80 |

Table 5.1666.5   GPS week: 1666   Day: 5   MJD: 55911.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    17    32    55 |     9     9    30 |     5     4    13 |
emr | emr 2876 |    24    29    70 |    11    13    33 |     8    10    34 |
esa | esa 2880 |    22    33    74 |     8    10    37 |     7     8    18 |
gfz | gfz 2969 |    48    39   226 |     7     9    36 |    11    11    23 |
grg | grg 2879 |    19    38    57 |     9    11    29 |    10    10    17 |
igr | igr 2975 |    17    30    62 |     8     9    29 |     7     7    18 |
igs | igs 2976 |    16    30    64 |     8     9    28 |     7     7    16 |
jpl | jpl 2688 |    22    43    80 |     8    11    32 |    10    10    23 |
mit | mit 2976 |    17    30    64 |     8    11    37 |    10     9    29 |

Table 5.1666.6   GPS week: 1666   Day: 6   MJD: 55912.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    44    32    35 |     7    12    23 |     5    10    16 |
emr | emr 2972 |    26    32    41 |     7    14    31 |    16    15    41 |
esa | esa 2976 |    43    34    33 |     7    12    21 |     8    12    20 |
gfz | gfz 2969 |    25    35    36 |     7    13    23 |     9    13    22 |
grg | grg 2976 |    29    35    39 |     7    11    27 |     9    12    26 |
igr | igr 2976 |    43    30    33 |     6    11    22 |     8    13    22 |
igs | igs 2976 |    44    33    35 |     6    12    23 |     8    11    21 |
jpl | jpl 2880 |    25    33    48 |     8    15    30 |     9     8    22 |
mit | mit 2976 |    26    34    35 |     8    11    26 |    13    15    32 |


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    : 21-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 6.1666   GPS week: 1666   MJD: 55906.500-55912.500

                                                         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     -23       3      97      1 |       3     17
            |      29       8      80      53      5 |       1
emr   uuxxu |      10      10     -16     347     10 |      13     22
            |      30      35     240     112      8 |       2
esa   uuuuu |       9     -20      94      43      1 |      -5     18
            |      10      23      40      82      8 |       2
gfz   uuuuu |     -14      28       2     121      3 |       6     16
            |      14      24      91      55      3 |       1
grg   uuuux |      19     -13      51      70     20 |      -3     20
            |      27      16      60      86     25 |       3
igr   xxxxx |     -43       1      21      74      0 |      -1     14
            |      15      22      61      89      7 |       2
irf   xxxxx |     -10       0      -4      15     -1 |      -1     16
            |      11       9      18      29      6 |       2
jpl   uuuuu |      22     -34     -22      48      7 |      15     20
            |      12      24      45      66      7 |       2
mit   uuuuu |     -45      17    -176    -205     -4 |       7     17
            |      22      19      39      69      3 |       2
ngs   uuuuu |      18      44     -23     -25     -7 |       2     12
            |      39      50      86      63      8 |       2
sio   uuuuu |     -22     -40      16     -75      2 |      14     23
            |      32      20      56     124     16 |       4


Table 7.1666.0   GPS week: 1666   Day: 0   MJD: 55906.500

                                                         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 |     -13     -30      34      84     -1 |       3     15
emr   uuxxu |      15       8     -46     267     21 |      12     19
esa   uuuuu |      -6     -26     125      57     -6 |      -3     16
gfz   uuuuu |     -27       7      67      68     -3 |       5     15
grg   uuuux |      21      -9      45     -55    -11 |       0     22
igr   xxxxx |     -57     -37      70     -60     -6 |       2     12
irf   xxxxx |       7      -6      10     -25     -9 |       1     14
jpl   uuuuu |      19     -68     -13       7     16 |      11     15
mit   uuuuu |      -3      -7    -197    -132     -4 |       8     16
ngs   uuuuu |     -10     110     -92      65     -5 |       2     11
sio   uuuuu |      40     -50       2    -198    -24 |      20     26

Table 7.1666.1   GPS week: 1666   Day: 1   MJD: 55907.500

                                                         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 |      35     -16    -109      75     -6 |       5     16
emr   uuxxu |      54      20    -156     399     14 |      13     22
esa   uuuuu |       6     -45      34      57    -10 |      -2     16
gfz   uuuuu |     -36      29      61      95      4 |       7     16
grg   uuuux |      30     -21      69      76     13 |      -1     21
igr   xxxxx |     -47      27     -60      62    -10 |       2     11
irf   xxxxx |     -14      -7       2      46     -7 |       1     14
jpl   uuuuu |      32     -39      45     -27     -6 |      14     20
mit   uuuuu |     -53      17    -133    -129     -4 |      10     17
ngs   uuuuu |      30      99     -67      -3      6 |       4     11
sio   uuuuu |     -29     -59      72    -121    -14 |      18     25

Table 7.1666.2   GPS week: 1666   Day: 2   MJD: 55908.500

                                                         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     -33      83      23     -5 |       4     16
emr   uuxxu |      -6      83    -464     560     12 |      13     22
esa   uuuuu |       4     -41     139     204     -4 |      -5     18
gfz   uuuuu |     -20      14     108     151      0 |       6     15
grg   uuuux |      35     -37      75     176      6 |      -6     17
igr   xxxxx |     -60     -12     -43      85     -3 |      -2     13
irf   xxxxx |     -17     -11      21      24     -4 |      -1     15
jpl   uuuuu |      24     -12     -65     -27     10 |      14     20
mit   uuuuu |     -68       9    -185    -297     -2 |       9     17
ngs   uuuuu |      75      67    -137     -97     -3 |       4     11
sio   uuuuu |     -37     -20      73    -222     -4 |      14     23

Table 7.1666.3   GPS week: 1666   Day: 3   MJD: 55909.500

                                                         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     -11      45     176      6 |       2     18
emr   uuxxu |      38     -10      30     321     11 |      12     21
esa   uuuuu |      11      -2      64      12      7 |      -7     19
gfz   uuuuu |     -13      49      44     128      8 |       5     16
grg   uuuux |      50     -22      56     135      2 |      -6     17
igr   xxxxx |     -52      12       1     134      6 |      -3     14
irf   xxxxx |       0      14     -11      30      4 |      -3     17
jpl   uuuuu |      17     -53     -80      77      9 |      13     19
mit   uuuuu |     -30      38    -192    -216      0 |       6     17
ngs   uuuuu |     -38       0      41      35    -18 |       3     12
sio   uuuuu |      -6     -21      -9    -128     12 |      11     22

Table 7.1666.4   GPS week: 1666   Day: 4   MJD: 55910.500

                                                         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 |      -6     -18    -111     151      3 |       3     18
emr   uuxxu |      13     -22      85     226     13 |      13     22
esa   uuuuu |      25      18      78     -68     13 |      -6     20
gfz   uuuuu |       2      -5     -58     207      3 |       6     17
grg   uuuux |      34     -12     -46     138     37 |      -6     17
igr   xxxxx |     -18     -10       8     159      8 |      -2     15
irf   xxxxx |      -3       2     -14      48      4 |      -2     17
jpl   uuuuu |       3     -41     -34      53      9 |      15     21
mit   uuuuu |     -50       9    -111    -147     -3 |       7     18
ngs   uuuuu |      -3      42      21     -17    -15 |       3     12
sio   uuuuu |     -32     -58      72      36     15 |      11     22

Table 7.1666.5   GPS week: 1666   Day: 5   MJD: 55911.500

                                                         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 |       3     -24      66     107      3 |       4     18
emr   uuxxu |     -13     -15     207     282      0 |      16     24
esa   uuuuu |       2     -32     133      14      7 |      -4     20
gfz   uuuuu |      -4      51     -66     147      4 |       8     18
grg   uuuux |     -10      -9     146     -16     61 |      -2     21
igr   xxxxx |     -31      18      72     166      7 |      -1     15
irf   xxxxx |     -19      10      -1     -10      3 |      -1     17
jpl   uuuuu |      15       0     -29     130     11 |      18     23
mit   uuuuu |     -59      47    -191    -269     -4 |       8     18
ngs   uuuuu |      54     -17     -37     -66    -10 |       3     12
sio   uuuuu |     -30     -16     -35       4     18 |      12     24

Table 7.1666.6   GPS week: 1666   Day: 6   MJD: 55912.500

                                                         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 |     -51     -28      10      60      5 |       2     18
emr   uuxxu |     -33       4     233     376      0 |      15     24
esa   uuuuu |      17     -16      84      27      2 |      -5     20
gfz   uuuuu |      -1      53    -142      47      2 |       6     17
grg   uuuux |     -27      15       9      35     33 |       1     24
igr   xxxxx |     -36       5      99     -26     -1 |      -2     15
irf   xxxxx |     -24       0     -34      -6     -1 |      -4     18
jpl   uuuuu |      41     -24      23     123      1 |      18     23
mit   uuuuu |     -56       5    -224    -245     -9 |       5     18
ngs   uuuuu |      19       3     112     -95     -2 |      -1     14
sio   uuuuu |     -59     -58     -60     105     12 |      11     23



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