[IGSREPORT-20799] Wk 1684 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Thu May 3 09:38:47 PDT 2012


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1684   (Apr 15, 2012 - Apr 21, 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:

igs1684[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1684[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1684[0-6].cls  IGS GPS clock combination summary report.
igs16847.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16847.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   | WILL
                0  |  EMR   | 8 8 MCM4
                0  |  ESA   | HYDE ONSA NNOR ONSA
                0  |  GFZ   | 8 CHAN DAV1
                0  |  GRG   | AMC2
                0  |  JPL   | 8
                0  |  MIT   | 8 8 CAS1 CAS1 MAW1
                1  |  COD   | FLRS
                1  |  ESA   | HERS YAKT NNOR
                1  |  GRG   | AMC2 LHAZ
                1  |  MIT   | CAS1
                2  |  COD   | COCO NRIL
                2  |  EMR   | MCM4
                2  |  ESA   | NNOR UNSA
                2  |  GFZ   | 30 BRFT CAS1 COCO THTI
                2  |  GRG   | AMC2
                2  |  MIT   | 1 1 11 CAS1 DAV1 MAW1 MIZU CAS1 DAV1 GMSD MIZU
                3  |  COD   | WILL
                3  |  ESA   | HERS NNOR UNSA
                3  |  GFZ   | BRFT DAV1 MATE NICO OHI2
                3  |  GRG   | AMC2
                3  |  MIT   | 17 CAS1 DAV1 CAS1
                4  |  COD   | RCMN WHIT
                4  |  EMR   | WHIT
                4  |  ESA   | WHIT NNOR UNSA
                4  |  GFZ   | 30 BRFT DAV1 DGAR IRKT RIO2
                4  |  GRG   | AMC2
                4  |  JPL   | WHIT
                4  |  MIT   | 30 28 30 CAS1 CAS1 KARR
                5  |  ESA   | CEDU HOB2 MAW1 CEDU UNSA
                5  |  GFZ   | BRFT DAV1 HOB2
                5  |  GRG   | AMC2
                5  |  JPL   | MANA
                5  |  MIT   | 1 11 1 11 30 CAS1 DAV1 CAS1 DAV1 MAW1
                6  |  COD   | FLRS GRAZ HOLM KARR
                6  |  EMR   | MCM4
                6  |  ESA   | AREQ NNOR UNSA
                6  |  GFZ   | BRFT DAV1 DGAR MATE MAW1
                6  |  GRG   | MAW1 NRC1
                6  |  MIT   | 14 14 BRST CAS1 DAV1 MAW1 BRST CAS1 DAV1 MAW1

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets.  Note that only the largest clock offset and drift are output
    to the summary file.  However, the clock combination and the listed RMS
    include all the clock segments.  In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                0  |  MIT   | ~00:00 | ~ 0.42 ns

 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  |  EMR   | ALL (high Transformation - See Table 2)
                1  |  EMR   | ALL (high Transformation - See Table 2)
                2  |  EMR   | ALL (high Transformation - See Table 2)
                3  |  EMR   | ALL (high Transformation - See Table 2)
                4  |  EMR   | ALL (high Transformation - See Table 2)
                5  |  EMR   | ALL (high Transformation - See Table 2)
                6  |  EMR   | 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  |     .7     .4    -.6     -32    -32     28     .04
       EMR  |    3.3  -13.0   11.4     162    104     67     .49
       ESA  |    1.9   -5.0   16.0     -83     -4    117     .07
       GFZ  |    -.1     .4    -.1     -42      5    -30     .07
       GRG  |    1.3   -9.7   16.2     -47     35    -25     .13
       JPL  |   -1.6   -4.7    1.3     -23    -16     44     .39
       MIT  |    4.7   -8.4   12.3     -58     38    -73     .30
       NGS  |    6.2   -4.7   11.5     -63    -23     32     .27
       SIO  |    -.3   -4.0     .4     -66    -71     30     .62


 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 1.1684.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1684.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 2.1684.[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 3.1684.[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 5.1684.0-6).

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 1684 summary.                       (Apr 15, 2012 - Apr 21, 2012)

Table 1.1684.a   GPS week: 1684   MJD: 56032.000-56038.000

         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  259|    0     0     0   -35    32    13  -.25   10    9 |    -785      74     20     81
        |    0     0     1    10    14    21   .01           |     649    1382
emr   89|    0    -1     4  -377  -232   -22   .48   20   20 |    5368     289     14    127
        |    1     1     0    21    26    19   .04           |     799    1272
esa  172|    0     1     0    23    12    44   .27    8    7 |    -801     191     14    143
        |    0     0     0    20    19    12   .03           |    1457    1917
gfz  191|    0     0    -1   -28   -16   -21  -.15   10   10 |     -17     118     28    125
        |    1     0     0    43    61     8   .03           |     527     886
grg  124|    0     0     5   -20   -74   -13   .62   16   14 |    -292      66     46    219
        |    1     0     1     4     9     5   .09           |     306     871
igr  n/a|    0     0    -2   -76   -12   -39  -.03    5    5 |    1912     307     18     86
        |    0     0     0    11    21    13   .01           |    1002    1423
jpl  127|    0     1    -7   -43     0    26   .56   16   16 |    2107     144     17     99
        |    1     1     1    10    13    22   .02           |     744    1297
mit  280|    0    -1     0    20   -71   -49  -.33   11   10 |    -437     219     20    170
        |    1     0     1    13    16    24   .03           |     256     555
ngs  226|    0    -1     2    42    33   -26  -.18   11    9 |    -757       6   2105   3725
        |    0     1     2    14    51    14   .02           |     572    1117
sio  241|    0     0     3    20   124    27  -.24   21   21 |     ---     ---    ---    ---
        |    3     0     2    16    18    28   .04           |     ---     ---


Table 1.1684.b   GPS week : 1684   MJD: 56032.000-56038.000   

         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  |    4    4    4    4    4    5    4 |
   2  |    5    5    4    4    4    5    5 |
   3  |    4    4    4    4    4    4    4 |
   4  |    5    4    4    4    4    4    4 |
   5  |    5    5    4    4    5    6    4 |
   6  |    4    4    4    4    3    4    4 |
   7  |    8    5    5    4    4    4    5 |
   8  |    6    7    7    5    4    4    4 |
   9  |    4    4    4    4    4    4    4 |
  10  |    5    5    4    4    5    5    7 |
  11  |    4    4    4    4    4    4    4 |
  12  |    5    5    5    5    5    5    5 |
  13  |    5    4    5    4    4    4    5 |
  14  |    5    5    5    4    4    4    4 |
  15  |    6    5    5    5    6    5    5 |
  16  |    5    5    5    4    5    5    9 |
  17  |    5    5    4    4    5    5    5 |
  18  |    5    4    4    4    4    4    4 |
  19  |    5    5    5    5    4    4    4 |
  20  |    4    5    5    5    4    5    4 |
  21  |    4    4    4    4    4    4    4 |
  22  |    5    4    4    4    4    4    4 |
  23  |    5    5    5    5    4    5    5 |
  24  |    0    0    0    0    0    0    0 |
  25  |    4    4    4    4    4    4    4 |
  26  |    4    4    4    4    4    4    4 |
  27  |    4    4    4    4    4    4    4 |
  28  |    5    4    5    4    4    5    4 |
  29  |    5    5    5    5    5    6    5 |
  30  |    5    4    5    4    4    5    5 |
  31  |    5    5    4    4    4    4    5 |
  32  |    6    5    4    4    4    4    4 |



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 2.1684.0   GPS week: 1684   Day: 0   MJD: 56032.000                            

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  259|    0     0    -1   -23    30    -1  -.24   10    9 |   -1418    1055     18     72
        |                      8     1                       |
emr   89|   -1    -1     3  -343  -218   -11   .50   22   22 |    5088    -412     13    129
        |                    -88   -20                       |
esa  172|    0     2     0     5    32    33   .25    9    9 |     591   -1388     15    146
        |                    -24   -20                       |
gfz  191|   -1     0    -1   -32    16   -18  -.11   10   10 |    -185     422     27    134
        |                     26    -7                       |
grg  124|    1     0     3   -14   -78   -16   .71   15   12 |    -525     676     48    238
        |                     -9    -4                       |
igr  n/a|    0    -1    -2   -71   -32   -35  -.03    5    5 |    1870    -659     20    104
        |                    -13    27                       |
jpl  127|    1     0    -5   -36    14    12   .59   17   16 |    2217    -558     16     99
        |                     -8   -30                       |
mit  280|    0    -2    -2    32   -63    -7  -.38   12   11 |    -570     844     22    278
        |                    -40    -1                       |
ngs  226|    0     0     4    55   -29   -41  -.22   11    8 |   -1438    1044   2339   3706
        |                     -9    65                       |
sio  241|    0     1     0     0   139    69  -.30   23   20 |     ---     ---    ---    ---
        |                    -59   -91                       |

Table 2.1684.1   GPS week: 1684   Day: 1   MJD: 56033.000                            

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  259|    0     0    -3   -35    39     5  -.24   10    9 |   -1284    1557     20     80
        |                     43    -7                       |
emr   89|    0    -2     4  -382  -236     0   .48   20   20 |    4552    -669     14    127
        |                    -83    20                       |
esa  172|    0     1     0    -2    21    37   .24    9    9 |   -2351    1700     16    148
        |                    -15   -20                       |
gfz  191|    0     1     0    35    -9   -36  -.13   10   10 |     187    -625     26    127
        |                     24   -32                       |
grg  124|    0     0     3   -20   -80    -6   .69   15   14 |      23    -952     41    220
        |                     -6   -22                       |
igr  n/a|    1     0    -4   -89     0   -30  -.03    6    5 |    1178   -1182     18     72
        |                     -7    12                       |
jpl  127|    0     1    -7   -41   -11    64   .55   16   15 |    1673   -1175     17     86
        |                    -49   -11                       |
mit  280|    0    -1     0    14   -80   -36  -.35   10   10 |    -332    -163     20    143
        |                    -30    13                       |
ngs  226|    0     0     6    20    32   -29  -.16   10    8 |   -1071    1066   1744   3174
        |                    -27    40                       |
sio  241|   -3     0     2    41   116    56  -.28   22   22 |     ---     ---    ---    ---
        |                    -91   -89                       |

Table 2.1684.2   GPS week: 1684   Day: 2   MJD: 56034.000                            

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  259|    1    -2     0   -40    45    -9  -.24    9    8 |   -1121     660     19     82
        |                     28     2                       |
emr   89|    2    -1     2  -372  -202   -13   .54   20   20 |    4335      98     13    125
        |                    -93   -26                       |
esa  172|    0     1    -1    24    30    53   .31    8    8 |     128   -1423     15    158
        |                    -29    -6                       |
gfz  191|    1     0    -1    -1   -55   -18  -.16   10   10 |    -793     689     26    118
        |                     28   -23                       |
grg  124|    0    -1     5   -22   -74   -12   .70   15   14 |    -115    -695     50    220
        |                    -20   -24                       |
igr  n/a|    0     0    -2   -75    -3   -48  -.03    6    6 |     443     -18     19     86
        |                     -7    20                       |
jpl  127|   -2     3    -8   -40    13    20   .57   17   16 |     947    -195     17     98
        |                    -17   -17                       |
mit  280|   -2    -1     1     3   -95   -37  -.33   10   10 |    -577       0     20    164
        |                    -19    16                       |
ngs  226|    0     0     3    40    76   -26  -.20   12   11 |   -1091     517   2053   3956
        |                    -41   -39                       |
sio  241|   -4     1     3    23    95    36  -.25   21   21 |     ---     ---    ---    ---
        |                    -81   -74                       |

Table 2.1684.3   GPS week: 1684   Day: 3   MJD: 56035.000                            

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  259|    0     0     0   -43    37    31  -.26    9    9 |     -92   -1541     27     97
        |                     17     3                       |
emr   89|    0    -1     4  -406  -222   -31   .50   20   20 |    5328    2553     13    123
        |                    -62    -3                       |
esa  172|    0     1     0    11    21    50   .27    6    6 |   -3006    3400     11    123
        |                    -21   -11                       |
gfz  191|    0     1    -1     3   -86   -15  -.16   11   11 |    -617    1741     29    141
        |                      1    -3                       |
grg  124|    0    -1     5   -11   -84    -7   .61   15   15 |    -582    1578     44    195
        |                    -18   -22                       |
igr  n/a|    1     0    -2   -80    12   -30  -.04    5    5 |    1291    2860     20     97
        |                     -4    -3                       |
jpl  127|    0     1    -8   -52     0    -4   .57   16   16 |    1646    2525     17     90
        |                    -49    64                       |
mit  280|    0    -1    -1    18   -80   -51  -.33   10    9 |    -656    1113     19    144
        |                    -21     4                       |
ngs  226|    0    -3     0    34    74   -45  -.18   10    8 |    -209   -1314   2361   4042
        |                    -73    -9                       |
sio  241|    0     0     3    18   122    23  -.25   19   18 |     ---     ---    ---    ---
        |                    -72   -68                       |

Table 2.1684.4   GPS week: 1684   Day: 4   MJD: 56036.000                            

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  259|    1     0     1   -53    47    24  -.24    9    9 |    -940     144     20     75
        |                     40    23                       |
emr   89|    0    -1     5  -398  -214    -7   .49   20   20 |    6360    -641     20    120
        |                    -57     5                       |
esa  172|   -1     0     0    29     7    58   .30    7    7 |    -902    1006     15    125
        |                    -35    14                       |
gfz  191|   -1     1    -2   -44   -71   -17  -.14   10    9 |     598    -268     27    119
        |                     17    -2                       |
grg  124|   -1     0     4   -24   -74   -22   .61   16   14 |    -326    -341     47    220
        |                     -9   -17                       |
igr  n/a|    0     0    -2   -89     3   -27  -.03    5    5 |    2745    -188     18     69
        |                      9    19                       |
jpl  127|    1     3    -9   -62   -17    16   .54   17   16 |    2860    -414     19     98
        |                     12    45                       |
mit  280|    0    -1     0    40   -69   -64  -.29    8    8 |    -427    -132     19    137
        |                    -27   -11                       |
ngs  226|    0    -2     0    50    91   -25  -.16   11   10 |    -955     123   2388   4025
        |                    -48    -6                       |
sio  241|    0     0     4    42   115    20  -.21   19   23 |     ---     ---    ---    ---
        |                    -66   -69                       |

Table 2.1684.5   GPS week: 1684   Day: 5   MJD: 56037.000                            

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  259|    0     0     0   -28     9    -4  -.25   11   11 |     324   -2129     22    108
        |                     29    39                       |
emr   89|    1     0     4  -374  -247   -41   .41   21   20 |    6373    -484     16    137
        |                    -68    39                       |
esa  172|    0     1     0    55    -5    54   .28    7    7 |     831   -1686     14    183
        |                    -27    18                       |
gfz  191|    0     0    -1   -86     0   -14  -.14   10    9 |     358    -689     31    128
        |                     -8   -18                       |
grg  124|    1     0     7   -21   -75   -10   .50   17   16 |     121    -144     50    234
        |                    -19   -12                       |
igr  n/a|    0     0    -2   -63   -17   -37  -.03    5    5 |    3227    -298     19     95
        |                     25    28                       |
jpl  127|    0     1    -7   -45    11    38   .54   16   15 |    3081    -488     20    121
        |                     12   -13                       |
mit  280|    1    -2     0     6   -43   -69  -.32   10   10 |      89    -367     21    173
        |                    -17   -19                       |
ngs  226|    0    -1    -1    62    21   -15  -.17   11   10 |     220   -1764   1815   3365
        |                    -73    64                       |
sio  241|    3     1     5     5   154     1  -.20   21   18 |     ---     ---    ---    ---
        |                    -46   -87                       |

Table 2.1684.6   GPS week: 1684   Day: 6   MJD: 56038.000                            

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  259|    0     0    -1   -25    15    49  -.27   10    9 |    -969     778     18     57
        |                     49    13                       |
emr   89|    2     0     5  -365  -283   -51   .44   20   20 |    5542    1583     14    134
        |                    -48    49                       |
esa  172|   -1     0     0    42   -18    25   .26    6    6 |    -902    -266     13    121
        |                    -24     3                       |
gfz  191|   -2     0    -2   -72    91   -30  -.21   10   10 |     329    -443     31    114
        |                     24   -38                       |
grg  124|    2    -1     7   -24   -54   -18   .51   18   15 |    -644     343     46    208
        |                     -9   -17                       |
igr  n/a|    0     0    -1   -63   -47   -67  -.03    5    5 |    2631    1637     18     79
        |                      9    25                       |
jpl  127|   -2     1    -6   -29   -13    35   .53   16   16 |    2329    1313     17    106
        |                     14   -31                       |
mit  280|    2    -1     0    27   -64   -77  -.32   15   11 |    -588     241     23    157
        |                    -21    -5                       |
ngs  226|    1    -1     2    32   -35    -3  -.16   10   10 |    -757     375   2035   3813
        |                    -72    55                       |
sio  241|    5     1     2    13   130   -12  -.20   24   23 |     ---     ---    ---    ---
        |                    -56   -77                       |

       
       
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 3.1684.0   GPS week: 1684   Day: 0   MJD: 56032.000                            

        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   21    9   13   14    6   13   11    8   19    4 |    46   48   42   46   44   46   46   47   46   42    43
   2  |    9   23    8   12   16    5   21   12    9   18    4 |    32   41   28   26   35   30   44   28   26   30    29
   3  |   10   10    8    9   10    5   12   10   14   18    4 |    31   37   29   29   31   27   29   27   31   25    28
   4  |   11   18    6    9   13    5   13   18   10   16    4 |    15   30   20   16   22   16   27   22   16   23    17
   5  |    6   21   10   11   16    4   21   11   10   21    4 |    31   42   38   37   42   32   38   32   29   34    32
   6  |    8   11    9    9   12    6   11   13   11   22    4 |    23   31   26   24   29   22   25   24   23   26    24
   7  |   26   20   11   15   23   10   21   16   21   35    7 |   103  109  109  113   93  107  112  111  117  102   109
   8E |   21   27   10   12   22    6   24   13   13   21    6 |    99  102  102  102  103  101  106  107  102  111   104
   9  |    6   21    8    8   15    5   16   11   11   16    4 |    18   32   18   22   22   18   27   23   20   21    19
  10  |   11   18   10    8   16    5   12   14    9   27    4 |    22   37   26   23   28   23   30   28   19   41    24
  11  |    8   18   10    8   16    6   13    9    9    8    4 |    14   25   14   19   25   15   20   15   14   16    13
  12  |   14   27    7    8   19    5   19   12    7   23    5 |    18   31   15   17   25   15   22   20   20   18    17
  13  |    6   20   11   11   15    7   14    8   13   20    4 |    18   32   25   24   31   21   30   26   20   22    22
  14  |    9   27   10   14    9    3   17   12    9   22    4 |    26   36   34   36   36   30   31   36   25   27    29
  15  |    9   29   12    9   12    5   22   14   15   33    5 |    26   33   24   24   29   21   26   24   20   35    21
  16  |    8   27   12   12   16    3   21   10   13   16    5 |    18   29   19   20   28   16   23   18   17   17    17
  17  |   10   17    6   10    6    6   17   15    9   29    4 |    27   36   28   30   31   27   35   32   30   29    28
  18  |    9   33   13   10   14    3   18   10   12   19    4 |    22   38   25   23   35   23   27   26   21   23    22
  19  |    8   18    8    8   11    9   16   10   10   28    4 |    25   32   28   25   24   22   30   27   24   24    25
  20  |    7   23    9    9   15    5   14   15   10   13    4 |    40   43   45   43   53   43   44   47   45   43    44
  21  |    9   24    9   10   16    3   13    9    9   23    4 |    30   39   25   23   33   27   36   28   27   35    27
  22  |    9   27   11    7   15    2   17   11   12   17    4 |    30   43   37   32   44   33   37   35   34   28    33
  23  |    6   23   10   14   13    6   12   15   12   28    5 |    19   32   25   26   23   21   27   25   24   33    23
 X24  |    4  ---  ---  ---  ---   41  ---  ---  ---  ---    0 |    42  ---  ---  ---  ---   52  ---  ---  ---  ---    42
  25  |    7   18    7   10   14    4   13   12    7   20    4 |    17   33   20   19   30   19   28   18   19   15    18
  26  |    4   16    8    5   11    4   12   13   10   18    3 |    18   28   21   19   25   19   25   17   16   24    18
  27  |    8   19    8    8   12    5   16   11   11   15    4 |    22   34   22   26   23   23   28   26   23   25    22
  28  |   11   22    9   13   15    5   18   12   12   15    4 |    17   32   20   23   34   18   28   20   19   17    19
  29  |    8   17    8   12   12    5   19   10    6   41    5 |    27   34   26   26   27   26   33   26   27   28    26
  30  |    7   17    6    9   14    5   14   11   11   36    4 |    16   31   18   19   25   17   25   18   18   33    18
  31  |    5   21   12   11   16    3   21   10   10   18    4 |    17   35   21   18   34   18   30   20   25   21    20
  32  |   16   23   10   10   19    5   17   17    8   28    5 |    56   61   67   65   55   63   68   63   65   72    64
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   22    9   10   15    5   17   12   11   23      |T   30   40   32   32   36   30   36   32   31   33    31
 WRMS |    9   22    9   10   12    5   16   11    8   20      |NE  32   42   33   34   35   32   39   35   34   35    33
 MEDI |    8   21    9   10   15    5   16   12   10   20      |MD  23   34   25   24   31   23   30   26   24   27    24

Table 3.1684.1   GPS week: 1684   Day: 1   MJD: 56033.000                            

        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   20    7   12   14    5   15    8    8   18    4 |    35   38   37   38   36   35   35   35   35   30    33
   2  |    9   21    8   15   15    3   23   10    8   19    5 |    26   37   24   21   34   23   36   23   20   25    23
   3  |    7   10    9   10   11    6   10    9    9   19    3 |    17   26   19   24   23   20   22   18   22   21    19
   4  |   11   16    7    8   11    6   13   15    9   15    4 |    17   33   22   17   22   18   28   20   14   24    17
   5  |    8   18   10   10   18    5   17   10   10   20    4 |    31   39   36   31   44   31   39   32   27   31    32
   6  |    6   12    9    8   13    6    9   11   10   23    4 |    15   26   23   22   25   18   23   18   23   19    19
   7  |   17   16    9    9   16    6   15   10   10   18    4 |    47   48   44   40   44   42   43   44   40   37    40
   8E |   22   28   12    9   24   12   23   10   11   33    6 |    68   89   76   68   81   76   81   69   73   61    69
   9  |    6   19    6    9   12    4   18   10   10   15    4 |    17   31   18   20   19   17   28   20   20   20    17
  10  |   11   16   11    9   12    5   12   11   10   27    4 |    22   35   27   21   30   23   34   22   20   37    23
  11  |    9   18    6    7   17    5   14    8   11   10    3 |    17   27   17   18   26   14   23   16   18   16    15
  12  |   15   24    9    8   16    6   20    9    8   22    4 |    18   34   18   19   25   17   25   20   15   17    16
  13  |    5   21   11   10   17    6   15    9   10   18    4 |    17   35   24   17   32   19   30   22   20   21    19
  14  |    9   26    9   13    9    5   16   11   11   22    4 |    20   37   30   34   34   28   31   28   26   22    26
  15  |    7   25   11    8   15    4   19   14   10   33    5 |    17   34   18   20   25   17   27   22   16   31    16
  16  |    7   27   12   13   16    4   20    8    9   21    4 |    20   35   29   27   32   22   27   24   23   24    22
  17  |   10   13   12    7    9    6   16   12   11   28    4 |    17   33   23   20   23   19   28   19   18   21    17
  18  |    9   29    8    9   14    5   15    9    8   19    4 |    21   38   29   26   34   22   30   23   21   21    23
  19  |   10   15    8    8   13    7   16   11   14   28    4 |    16   28   22   24   21   19   24   21   24   22    19
  20  |    8   22   11    9   18    4   14   13   11   13    4 |    42   47   48   43   54   45   46   49   44   46    44
  21  |    8   22    8    8   16    4   13    8    7   24    4 |    23   37   20   22   30   23   32   23   24   31    21
  22  |    9   25    7    8   15    4   16   11    7   14    4 |    27   38   36   34   44   30   36   30   29   26    31
  23  |    6   21   10   11   17    4   12   11   12   27    4 |    16   31   22   20   27   18   24   21   20   29    18
 X24  |    5  ---  ---  ---  ---   29  ---  ---  ---  ---    0 |    33  ---  ---  ---  ---   42  ---  ---  ---  ---    33
  25  |    5   18    6   10   13    3   13    9    8   15    3 |    16   30   20   15   30   17   29   19   15   17    17
  26  |    8   11    8    5   12    5   11    9   13   19    4 |    18   28   19   19   23   17   26   18   17   28    17
  27  |    9   21    6    9   13    4   16   10    9   15    4 |    17   32   19   22   20   18   26   22   20   22    18
  28  |   10   21   10    8   16    7   18    9    9   16    4 |    13   32   20   18   32   16   27   17   14   16    16
  29  |    6   13   10   13   12    6   18    7    6   37    4 |    15   29   20   20   18   17   25   19   19   21    16
  30  |    6   17    7    8   10    5   12    8   11   33    4 |    17   34   23   23   26   18   27   20   17   34    19
  31  |    4   21   11   18   16    4   18   10   13   18    5 |    20   37   26   22   36   20   31   21   25   20    21
  32  |   11   23   10    8   13    8   16   11   10   19    4 |    27   38   32   25   32   28   34   25   25   34    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   20    9   10   15    6   16   10   10   22      |T   23   36   27   25   31   24   31   25   24   26    23
 WRMS |    9   20    9   10   14    5   15   10    8   22      |NE  22   34   25   24   27   22   30   24   22   25    21
 MEDI |    8   21    9    9   14    5   16   10   10   19      |MD  18   34   23   22   30   19   28   22   20   24    19

Table 3.1684.2   GPS week: 1684   Day: 2   MJD: 56034.000                            

        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  |    4   19    9   10   15    6   14    8   10   14    3 |    38   40   39   41   36   37   38   40   36   34    37
   2  |    8   23    8   12   14    4   21    8    9   18    4 |    28   39   27   25   36   27   39   25   26   28    27
   3  |    6   11    7    9   16    6   10    9   13   17    4 |    21   21   16   18   19   16   18   15   21   15    17
   4  |   12   17    5   10   11    5   10   14   13   12    4 |    14   29   19   18   21   18   26   20   18   21    17
   5  |    6   21    6    8   18    5   20   11    9   15    4 |    27   35   32   32   43   30   37   29   28   26    31
   6  |    7   12    7   11   16    5   10    9   14   19    4 |    18   25   19   19   25   16   22   16   19   15    18
   7  |    9   16    9    7   17    5   20   12   12   16    4 |    38   42   34   36   38   37   43   37   36   38    35
   8E |   24   32   10   13   19    7   25   13   13   25    6 |    76   82   81   84   85   79   89   85   78   86    82
   9  |    8   22    8   10   10    5   19    7    9   15    4 |    16   26   19   25   19   16   24   21   19   19    19
  10  |    9   18    8    9   14    6   11   11   10   15    4 |    20   36   25   23   31   23   32   27   22   33    24
  11  |    7   16   10    6   19    5   15    8   12    8    3 |    12   26   11   15   22   10   21   13   13   14    10
  12  |   12   27    7   10   15    6   23    9   11   22    4 |    14   28   15   14   22   13   21   16   13   14    13
  13  |    5   19   12   10   18    5   18    9   13   17    4 |    17   32   23   16   28   17   28   21   18   19    18
  14  |    8   25    8   11   12    4   15   12   13   21    4 |    20   39   28   29   32   23   33   26   19   20    23
  15  |    9   25   11    7   15    8   22   13   10   33    5 |    20   30   22   20   27   20   25   20   19   30    19
  16  |    8   23   11   11   16    5   19    8   13   25    4 |    12   29   19   19   28   14   22   12   17   14    14
  17  |    7   10    7    9    6    5   17    9   13   27    4 |    20   32   24   23   26   23   32   27   25   22    23
  18  |    8   24    9   10   16    5   15    8    7   18    4 |    19   32   26   26   33   21   26   20   21   17    22
  19  |    8   19    8    7   12    7   16   11   12   28    4 |    19   27   20   20   21   19   24   22   23   21    19
  20  |    9   19    7    9   23    5   17   15   12   12    4 |    35   46   38   37   42   37   37   45   38   46    36
  21  |    7   24    8   10   17    5   14    8   11   22    4 |    27   40   24   25   30   24   32   23   32   30    24
  22  |    8   23    8    8   18    4   14   11   12   13    4 |    25   38   36   30   45   28   35   30   26   25    30
  23  |    5   20   10   11   17    5   16   10   16   27    5 |    15   30   18   18   21   16   23   20   19   29    15
 X24  |    5  ---  ---  ---  ---   31  ---  ---  ---  ---    0 |    34  ---  ---  ---  ---   28  ---  ---  ---  ---    34
  25  |    9   18    7   12   14    4   15   10   13   19    4 |    13   27   18   20   25   15   26   16   15   20    16
  26  |    6   13   11    5   15    6   12    8   10   17    3 |    15   22   22   18   23   18   23   17   15   22    18
  27  |    8   19    7    8   12    4   18    9    9   17    3 |    17   25   22   25   22   19   24   21   21   22    20
  28  |    6   23    9   12   15    7   18   10   12   15    4 |    12   28   20   16   30   14   25   17   19   14    16
  29  |    9   17    5   12   13    6   19    7   14   36    5 |    19   29   20   20   20   19   26   20   23   24    19
  30  |    6   16    6    9   12    4   15   11   12   31    4 |    15   30   17   17   22   14   23   17   12   31    16
  31  |    6   22    7   10   17    5   17   10   14   17    4 |    15   33   21   18   33   16   27   18   23   20    19
  32  |    8   21    9    7   14    9   16    9   11   18    4 |    26   39   30   29   29   26   31   26   27   32    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20    8   10   15    6   17   10   12   21      |T   22   33   25   25   30   22   30   24   23   25    23
 WRMS |    8   20    8   10   14    6   16   10   11   21      |NE  21   31   24   24   27   22   29   24   23   25    23
 MEDI |    8   19    8   10   15    5   16    9   12   18      |MD  19   30   22   20   28   19   26   21   21   22    19

Table 3.1684.3   GPS week: 1684   Day: 3   MJD: 56035.000                            

        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   20    5   12   16    5   13    9   10   14    3 |    47   47   43   46   42   45   46   46   47   41    43
   2  |    9   21    6   12   15    3   23    8    6   17    4 |    33   42   33   31   39   33   46   31   34   32    33
   3  |   10   14    5    8   17    6   12    7    7   16    3 |    33   42   38   39   38   36   41   34   37   32    35
   4  |   10   16    4   11    9    4   12    9    9   12    3 |    16   32   22   23   24   21   30   21   23   20    21
   5  |    9   19    5   10   20    5   23   10    7   12    4 |    30   40   33   35   45   32   39   33   31   27    32
   6  |    7   14    6    7   13    6   11    8   10   16    3 |    17   29   25   23   28   20   27   22   16   17    21
   7  |    8   17    6    9   17    6   15    8   12   10    3 |    31   39   32   34   35   31   35   33   37   31    33
   8  |   17   19    6   11   19    9   23    8    9   14    5 |    78   90   79   83   87   81   87   84   80   81    81
   9  |    8   25    4   10   13    4   20    9    9   12    3 |    22   35   25   28   22   22   30   23   24   23    23
  10  |   11   19    5   17   10    5   10   10    9   14    4 |    23   39   26   29   29   24   34   27   25   28    25
  11  |    7   20    7    9   19    7   10    7    9    8    3 |    12   29   13   15   23   14   21   15   19   18    12
  12  |   12   26    7    9   18    4   21    9    7   21    4 |    17   33   20   20   28   16   25   19   19   16    17
  13  |    7   19    7   13   19    4   14    9   12   16    4 |    20   36   25   22   31   23   34   29   22   24    23
  14  |    7   25    5   10   12    4   14   10   10   19    3 |    28   37   33   34   36   30   34   32   25   24    29
  15  |   11   26    9    7   14    4   18   12   12   33    5 |    23   32   23   24   27   19   26   24   18   33    21
  16  |    7   22    6   13   15    4   17    7    9   25    4 |    16   31   22   23   30   17   23   17   17   19    17
  17  |    6   14    5   11    6    6   17   10    7   26    4 |    28   37   32   30   32   29   38   28   27   31    28
  18  |    8   27    4    9   13    5   14    7   10   15    3 |    26   37   32   30   35   28   30   28   26   22    28
  19  |   11   19   13   10   15    7   16   11   12   29    5 |    28   34   32   28   27   26   32   28   24   25    26
  20E |    9   22    8   11   20    5   16   21   12   10    5 |    59   66   61   62   66   61   66   65   61   62    61
  21  |    7   18    6   11   18    4   14    9   14   22    4 |    32   39   33   28   34   32   40   33   40   37    32
  22  |    8   23    7    9   18    5   13   13   11   10    4 |    32   41   41   33   45   36   40   36   37   33    35
  23  |    6   20    7   14   16    5   13   12    7   26    4 |    19   35   21   24   25   21   27   25   19   31    20
 X24  |    5  ---  ---  ---  ---   30  ---  ---  ---  ---    0 |    50  ---  ---  ---  ---   55  ---  ---  ---  ---    51
  25  |   10   24    5   13   14    3   13   10    7   12    3 |    15   35   22   20   30   18   29   21   20   19    19
  26  |    9   12    7    6   12    4   12    8   10   17    3 |    17   27   22   22   25   21   27   22   21   25    21
  27  |   10   22    5    9   13    4   18    8    9   14    3 |    26   34   27   29   24   25   29   24   27   27    25
  28  |    7   17    6    9   17    6   19    8    6   15    3 |    19   30   23   20   33   16   29   20   21   20    20
  29  |   11   13    4   14   12    8   18    8   13   33    5 |    25   34   28   27   28   26   34   28   34   28    27
  30  |    5   21    4   11   12    5   13   11    9   28    4 |    17   39   20   19   24   17   27   21   20   33    19
  31  |    8   20    7   12   18    3   16    9   11   12    4 |    20   39   27   23   37   23   32   25   27   24    24
  32  |    8   16    6    8   13    8   17    8    8   17    3 |    20   36   28   24   31   24   37   22   28   29    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20    6   11   15    5   16   10   10   19      |T   27   38   30   29   34   28   35   29   29   29    28
 WRMS |    9   20    6   11   15    5   16    9    8   18      |NE  25   35   28   28   29   26   32   27   27   28    26
 MEDI |    8   20    6   10   15    5   15    9    9   16      |MD  23   36   27   28   31   24   32   27   25   27    25

Table 3.1684.4   GPS week: 1684   Day: 4   MJD: 56036.000                            

        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   16    7   10   15    5   12    9   11   15    3 |    42   40   37   42   37   41   39   44   43   38    39
   2  |    9   23    7   12   17    4   24    6    8   17    4 |    30   42   31   26   37   31   43   27   28   30    29
   3  |   11   13    6    9   13    8   12    7   15   16    4 |    27   40   33   36   35   30   33   35   27   28    30
   4  |   10   13    4   10   11    4   13   11   11   11    3 |    16   31   22   19   22   18   29   15   18   18    17
   5  |   10   21    5   10   23    5   23    9    9   13    4 |    35   44   42   39   56   38   43   38   35   35    38
   6  |    4   13    7    9   10    6   10    5   11   17    3 |    21   28   23   22   26   19   25   21   21   18    21
   7  |    8   17    6   10   18    4   15    7   10   11    3 |    23   34   26   27   31   25   28   30   31   29    27
   8  |   11   21    5    9   20    7   20    8   10   15    4 |    59   66   58   58   66   55   64   57   54   58    58
   9  |    9   21    6   10   17    3   18    8   10   13    4 |    19   31   19   25   24   19   26   21   26   20    20
  10  |   10   15    7   15   13    5   12   13    9   17    4 |    22   31   28   23   30   21   32   23   19   28    23
  11  |    7   16    7    8   17    4   12    7   13   11    3 |    12   25   11   14   20   12   19   16   15   18    10
  12  |   11   26    7    9   16    4   24   10   10   19    4 |    18   31   18   14   23   14   23   18   16   15    15
  13  |    4   21    9   10   18    6   15    8   14   20    4 |    16   32   25   17   31   16   30   21   18   18    19
  14  |    7   26    7   10   11    5   18    9   10   20    4 |    21   34   31   31   34   26   32   28   24   19    26
  15  |   14   29    8   14   17    4   22   10   10   32    5 |    23   30   23   25   26   19   23   20   23   31    21
  16  |    7   21    9    9   14    4   18    7   12   27    4 |    21   32   24   23   32   20   25   26   26   27    22
  17  |    7   13    7   11    9    6   18   10   11   28    4 |    22   34   24   26   25   24   30   25   25   24    22
  18  |   10   32    6    8   20    5   18    7    8   15    4 |    27   40   35   34   44   29   30   28   26   23    29
  19  |    8   18    8    7   11    5   15    4   14   28    4 |    20   31   24   22   22   21   28   22   25   22    21
  20E |    7   15    9    9   13    6   11   11   12   11    3 |    28   32   35   34   34   32   32   34   31   33    33
  21  |    7   21    7    9   19    5   15    8   11   23    4 |    28   35   28   29   31   29   34   29   34   34    28
  22  |    8   24    6    9   22    5   15   13    9   11    4 |    30   42   41   38   54   35   38   37   33   33    36
  23  |    5   20    8    8   15    4   11   10   13   27    4 |    13   29   22   18   24   15   25   20   14   26    17
 X24  |    6  ---  ---  ---  ---   24  ---  ---  ---  ---    0 |    39  ---  ---  ---  ---   26  ---  ---  ---  ---    40
  25  |    8   21    5   10   13    4   13    9   14   12    3 |    17   33   18   14   27   14   25   16   17   13    14
  26  |   11   15    7    6   13    5   14    8   10   19    3 |    17   25   21   19   25   17   23   19   19   23    19
  27  |    9   20    4    9   15    3   18    8   12   14    4 |    21   31   22   26   25   21   27   22   23   23    21
  28  |   10   18    8    8   18    6   19    5    6   14    3 |    15   31   20   18   31   15   23   18   15   17    17
  29  |   10   14    7   11   13    5   21    8   10   34    4 |    23   28   22   22   20   20   27   22   22   23    21
  30  |    6   21    5    9   11    5   15    7   10   29    4 |    21   36   18   17   23   17   27   20   21   34    19
  31  |    7   18    7   11   21    3   16    7   11   12    4 |    20   34   25   16   36   20   30   22   24   21    21
  32  |    9   17    6    7   13    5   16    7    9   18    3 |    19   33   28   25   30   22   32   23   25   29    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20    7   10   16    5   17    8   11   19      |T   23   34   26   25   31   23   30   25   25   26    24
 WRMS |    9   20    7    9   14    5   16    8   10   23      |NE  22   32   24   25   27   22   28   24   25   25    23
 MEDI |    8   20    7    9   15    5   15    8   10   17      |MD  21   32   24   25   30   21   29   22   24   24    21

Table 3.1684.5   GPS week: 1684   Day: 5   MJD: 56037.000                            

        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   15    8   11   16    5   12   13   13   18    4 |    41   38   35   41   30   37   38   46   44   36    38
   2  |   11   24    6   15   17    6   24    7   10   17    4 |    27   39   29   26   28   26   39   24   28   23    25
   3  |   13   15    4   10   17    6   12    8    9   19    4 |    56   48   52   54   48   51   50   52   51   52    52
   4  |   10   14    3   10   14    4   13   10    7   11    3 |    14   30   20   20   19   18   28   15   16   17    17
   5  |   23   25    9   12   17    8   22   14    7   14    5 |    59   67   68   68   68   63   66   64   64   62    65
   6  |   10   13    5    7   10    4   10    9    9   19    3 |    18   21   19   16   19   15   18   18   14   20    16
   7  |    8   17    7    9   21    5   14    7   11    9    4 |    26   30   25   23   32   25   30   26   27   25    26
   8  |   11   19    6    8   17    4   14   10    8   18    4 |    33   44   37   41   42   36   42   36   37   39    36
   9  |    8   22    7    8   15    4   17   10   11   16    4 |    14   30   19   21   22   14   23   18   18   18    18
  10  |   14   18    6   16   21    5   18   13   11   23    5 |    21   37   27   29   37   23   35   24   25   29    25
  11  |   11   16    8   11   19    4   11   10   11   12    4 |    19   25   17   18   21   16   21   19   18   19    16
  12  |   15   28    7    9   18    5   20   16   16   20    5 |    15   29   15   12   21   14   20   19   14   13    13
  13  |    7   22    7   10   20    4   16    8   12   21    4 |    18   35   23   24   31   21   30   23   24   21    22
  14  |    8   26    8    8   16    5   16   11    6   20    4 |    20   35   26   23   29   21   29   21   21   18    23
  15  |   15   27    8   10   17    4   20    9   11   33    5 |    22   28   18   20   26   19   24   18   18   31    18
  16  |    9   23    6    8   17    4   18    6    9   31    4 |    24   27   22   22   30   21   25   25   22   36    22
  17  |    8   13    6   10    9    6   18   10   12   33    4 |    19   31   23   22   25   22   29   23   23   27    21
  18E |   15   37    5    7   16    5   15   12    7   15    4 |    33   51   40   36   40   36   39   35   34   35    36
  19  |    8   15    5    8   12    6   14    8   10   30    4 |    22   28   23   22   23   20   26   21   23   14    21
  20E |   10   20   12   10   16    4   15    8   13   10    4 |    38   46   45   47   45   42   44   48   45   45    43
  21  |    9   27    5    8   17    3   15   10   10   23    4 |    23   34   26   22   24   25   31   27   30   32    26
  22E |    8   24    6    9   18    6   11   16   10   10    4 |    40   49   43   38   46   40   45   40   42   40    41
  23  |    7   21    7   12   16    2   13    9   10   27    4 |    17   32   21   25   24   20   26   22   20   30    21
 X24  |    4  ---  ---  ---  ---   59  ---  ---  ---  ---    0 |    68  ---  ---  ---  ---   60  ---  ---  ---  ---    70
  25  |    8   20    5   10   16    2   12   12   11   10    4 |    18   32   21   17   29   18   27   20   19   16    18
  26  |   13   13    6    8   15    6   11    8    9   18    3 |    21   21   19   20   21   17   22   19   15   21    19
  27  |    9   19    6    6   16    4   15   10    9   19    4 |    19   29   23   19   25   18   24   19   20   22    20
  28  |    9   19    9    7   19    4   21   11    9   19    4 |    13   29   20   12   31   15   29   17   14   15    17
  29  |   16   15    6   11   16    7   19    9   15   34    5 |    25   25   17   16   18   20   24   18   22   20    18
  30  |   12   17    7   10   13    5   14   10   12   31    4 |    16   32   20   17   22   14   23   17   15   35    17
  31  |   12   23    6    8   25    3   13   10    9   11    4 |    18   32   20   17   37   17   25   19   20   17    19
  32  |   10   18    7   10   16    4   15    8   13   20    4 |    22   33   26   27   29   23   31   24   25   28    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   21    7   10   17    5   16   10   11   21      |T   26   34   27   26   30   25   31   26   26   27    26
 WRMS |   11   20    7    9   16    5   15   10   10   18      |NE  21   29   22   22   26   20   27   22   22   23    21
 MEDI |   10   19    6   10   16    4   15   10   10   19      |MD  21   32   23   22   29   21   29   22   22   25    21

Table 3.1684.6   GPS week: 1684   Day: 6   MJD: 56038.000                            

        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   15    7    9   15    5   14   17    9   23    4 |    50   51   49   55   44   52   49   60   51   47    49
   2M |   11   22    7   10   14    6   23   11    8   17    4 |    42   53   40   36   44   42   54   41   42   37    41
   3M |    8   12    6    7   19    4   11   17   11   17    4 |    51   53   51   50   56   49   49   53   50   50    49
   4  |   10   14    6    8   13    6   13   11    8   13    3 |    19   32   25   21   23   23   33   19   22   21    21
   5E |    9   18    6   10   14    4   20    9   11   21    4 |    51   62   63   63   64   61   63   61   55   59    59
   6M |    7   12    5    6   15    6   10   21   11   17    4 |    38   44   41   39   44   37   40   42   39   41    38
   7  |    9   20    6   11   25    3   15   12   10   11    4 |    32   44   35   37   42   34   36   38   36   40    35
   8  |   10   20    5    8   18    5   16   11   10   15    4 |    69   70   67   69   73   67   73   73   65   68    69
   9  |    6   19    4    7   14    5   17    8    8   14    3 |    22   33   22   25   28   21   27   23   26   24    22
  10E |   23   19    9   14   21    4   17   15   15   42    6 |    44   52   50   44   50   44   53   45   40   52    46
  11M |    6   16    6    7   20    4   11   12    8   14    3 |    22   31   19   15   30   19   31   21   18   22    19
  12M |   11   23    5    9   17    5   21   14    7   19    4 |    19   31   19   17   25   16   22   19   15   16    16
  13M |    8   23    9   12   23    5   15    8    9   29    4 |    24   38   29   26   36   25   36   31   27   29    26
  14M |    8   27    6    8   19    6   17   10    9   22    4 |    29   38   36   36   43   32   34   35   31   23    32
  15  |   11   27    6   11   20    5   21    9    8   35    5 |    30   31   26   29   33   24   28   22   25   31    25
  16M |   17   26    9   14   18   12   24   49   11   45    8 |    52   65   62   63   65   55   58   85   61   83    59
  17  |   11   14    6   13    9    4   15   14   11   40    5 |    29   41   34   34   32   32   36   34   33   40    30
  18E |    7   32    7   10   16    5   18    7   10   19    4 |    40   46   48   46   47   44   44   43   40   33    43
  19M |   11   14    6    7   16    4   13    8    9   31    4 |    26   33   28   29   28   28   33   28   28   32    27
  20E |   10   17    6   12   17    6   12   11    8   14    4 |    35   40   39   37   40   38   40   43   37   40    38
  21M |    8   25    5    8   13    4   17   14    9   22    4 |    36   46   36   35   38   37   47   37   35   38    36
  22E |    8   25    8    7   15    5   14   17    9    9    4 |    51   51   57   50   58   53   54   52   48   48    52
  23M |    9   22    7   13   19    5   12   10   10   28    4 |    21   35   27   27   28   23   31   29   25   32    24
 X24M |    5  ---  ---  ---  ---   33  ---  ---  ---  ---    0 |    56  ---  ---  ---  ---   56  ---  ---  ---  ---    55
  25M |    8   20    4    8   18    4   13   10    9   10    3 |    21   28   20   16   25   19   27   23   17   18    19
  26  |   10   12    6    9   14    4   11    8   13   22    4 |    25   31   29   28   29   26   30   25   24   28    26
  27  |    7   19    3    8   16    4   16    8   10   16    3 |    25   36   27   26   32   25   30   24   30   28    25
  28M |    8   19    7    9   18    4   17   10   11   18    4 |    17   31   25   20   32   19   25   22   21   22    21
  29M |    9   14    5   11   14    6   19   11   11   36    5 |    32   39   32   31   33   30   37   32   29   31    30
  30M |   10   17    4    9   14    3   12    8    9   39    4 |    21   38   25   23   28   21   31   25   24   49    23
  31  |    9   20    5    6   31    7   16   16   11   10    4 |    23   42   32   24   46   26   35   31   29   27    28
  32M |   11   20    5    9   18    4   17   10    7   25    4 |    25   36   31   26   36   27   37   30   27   38    28
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   20    6   10   18    5   16   15   10   24      |T   33   41   36   34   39   34   39   36   33   37    34
 WRMS |    9   20    6   10   15    5   16   11   10   23      |NE  28   37   31   31   34   29   33   30   30   31    29
 MEDI |    9   19    6    9   17    5   16   11    9   19      |MD  29   39   32   31   36   30   36   32   30   33    30



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 4.1684   GPS week: 1684   MJD: 56032.0-56038.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3057 |U    4     4    12 |U    6     8    21 |U   18    10    46 |
emr | emr 2975 |     7     6    17 |U    8     9    24 |    20    14    47 |
esa | esa 2976 |     4     5    12 |U    6     8    22 |    16    11    41 |
gfz | gfz 2973 |U    4     5    12 |U    6     9    23 |U   19    11    41 |
grg | grg 2975 |     6     7    20 |U    7     9    28 |    16    12    44 |
igr | igr 2975 |     4     5    11 |     6     8    21 |    18    12    41 |
igs | igs 2975 |     4     5    12 |     6     8    22 |    18    11    41 |
jpl | jpl 2974 |     6     6    15 |U    7     9    24 |U   20    12    44 |
mit | mit 2976 |     5     6    14 |U    7     9    24 |    21    15    47 |



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 5.1684.0   GPS week: 1684   Day: 0   MJD: 56032.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3059 |     3     3     9 |    10    13    29 |    26    24    68 |
emr | emr 2972 |     6     5    18 |    13    14    27 |    26    33    29 |
esa | esa 2976 |     3     3    11 |    10    14    29 |    15    29    29 |
gfz | gfz 2972 |     3     3    10 |    10    13    31 |    18    28    29 |
grg | grg 2976 |     7     7    23 |    10    14    33 |    21    27    27 |
igr | igr 2976 |     3     3    10 |     9    13    28 |    21    30    26 |
igs | igs 2973 |     4     4    11 |    10    13    30 |    22    28    27 |
jpl | jpl 2971 |     5     4    13 |    11    13    29 |    22    29    27 |
mit | mit 2976 |     4     7    13 |    10    13    32 |    29    31    32 |

Table 5.1684.1   GPS week: 1684   Day: 1   MJD: 56033.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3065 |     5     4    13 |     5    10    23 |    43     9   111 |
emr | emr 2974 |     6     6    16 |     9    12    23 |    44     6   125 |
esa | esa 2976 |     4     4    10 |     6    13    24 |    39     7   109 |
gfz | gfz 2972 |     4     4     9 |     6    12    23 |    47     8   113 |
grg | grg 2976 |     8    10    22 |     8    13    29 |    32     8   110 |
igr | igr 2976 |     4     5     9 |     6    11    22 |    44     8   110 |
igs | igs 2976 |     4     4    10 |     6    11    23 |    42     8   114 |
jpl | jpl 2974 |     6     7    13 |     7    15    27 |    47     9   119 |
mit | mit 2976 |     5     5    12 |     7    12    26 |    41     8   111 |

Table 5.1684.2   GPS week: 1684   Day: 2   MJD: 56034.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3056 |     4     5    11 |     6     7    20 |     6    11    18 |
emr | emr 2976 |     6     7    17 |     7     9    26 |     7    22    23 |
esa | esa 2976 |     4     5    11 |     6     8    21 |     7    11    17 |
gfz | gfz 2971 |     4     4    11 |     8     8    26 |     8    15    19 |
grg | grg 2976 |     6     6    17 |     6     9    26 |     9    10    28 |
igr | igr 2976 |     4     4    11 |     6     7    21 |     6    13    21 |
igs | igs 2976 |     4     5    12 |     6     8    21 |     6    15    18 |
jpl | jpl 2976 |     5     7    15 |     7     7    23 |     7    12    22 |
mit | mit 2976 |     5     6    16 |     6     9    24 |     9    19    20 |

Table 5.1684.3   GPS week: 1684   Day: 3   MJD: 56035.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3054 |     5     4    13 |     6     7    16 |     6     9    16 |
emr | emr 2976 |     7     5    19 |     6     7    21 |     7     9    20 |
esa | esa 2976 |     5     4    14 |     5     6    17 |     7    10    17 |
gfz | gfz 2976 |     5     4    14 |     5     6    18 |     7     9    16 |
grg | grg 2976 |     5     7    21 |     5     7    24 |     8    10    18 |
igr | igr 2976 |     5     4    14 |     5     6    16 |     8     8    18 |
igs | igs 2976 |     5     4    14 |     5     6    18 |     8     9    16 |
jpl | jpl 2975 |     6     4    16 |     5     8    19 |     8     8    16 |
mit | mit 2976 |     6     5    15 |     6     7    22 |    10    11    19 |

Table 5.1684.4   GPS week: 1684   Day: 4   MJD: 56036.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3043 |     4     6    10 |     6     6    19 |     8    10    18 |
emr | emr 2976 |     8     7    16 |     7     6    22 |    13    11    22 |
esa | esa 2976 |     4     5    10 |     6     6    19 |    10    10    21 |
gfz | gfz 2975 |     4     6    11 |     5     6    21 |     9    10    18 |
grg | grg 2975 |     6     6    21 |     5     8    23 |    10    12    27 |
igr | igr 2974 |     5     6    11 |     5     6    19 |    10    10    19 |
igs | igs 2976 |     4     5    11 |     5     5    19 |    10    11    20 |
jpl | jpl 2973 |     6     6    15 |     7     6    21 |    11    10    21 |
mit | mit 2976 |     5     6    13 |     6     8    23 |    11    14    24 |

Table 5.1684.5   GPS week: 1684   Day: 5   MJD: 56037.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3063 |     4     5    12 |     6     7    19 |     6     5    16 |
emr | emr 2976 |     9     8    17 |     7     7    23 |     8     7    22 |
esa | esa 2976 |     5     5    11 |     6     7    23 |     6     6    18 |
gfz | gfz 2975 |     5     5    12 |     6     8    25 |     6     6    16 |
grg | grg 2976 |     8     8    16 |     8     9    36 |     7     9    18 |
igr | igr 2976 |     5     5    11 |     6     8    21 |     6     7    17 |
igs | igs 2976 |     5     6    12 |     6     7    23 |     6     5    17 |
jpl | jpl 2976 |     7     7    16 |     6     8    20 |     7     9    19 |
mit | mit 2976 |     5     6    14 |     7     9    21 |    18    18    52 |

Table 5.1684.6   GPS week: 1684   Day: 6   MJD: 56038.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3065 |     5     5    13 |     4     7    19 |    34     4    75 |
emr | emr 2976 |     9     7    20 |     7     8    22 |    36     7    87 |
esa | esa 2976 |     5     6    14 |     5     6    19 |    30     5    75 |
gfz | gfz 2975 |     5     6    15 |     5     7    20 |    36     4    74 |
grg | grg 2976 |     6     7    19 |     6     7    25 |    27     8    78 |
igr | igr 2976 |     5     6    14 |     5     6    19 |    34     4    77 |
igs | igs 2976 |     5     6    15 |     5     7    21 |    33     4    77 |
jpl | jpl 2976 |     6     7    18 |     5     8    26 |    36     4    82 |
mit | mit 2976 |     5     7    16 |     6     8    20 |    32     8    75 |


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 6.1684   GPS week: 1684   MJD: 56032.500-56038.500

                                                         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 |     -16     -53      88     -30      3 |       4     16
            |      13      16      53     107      3 |       1
emr   xxxxx |     -14      49     120     100     -6 |      63     65
            |      26      20      71     124      5 |       2
esa   uuuuu |      -2       3      51     133     -3 |      12     22
            |      14       8      45      68      8 |       2
gfz   uuuuu |      12     -38     123     -32      3 |      12     18
            |      13      10      74      40      5 |       2
grg   uuuux |      12      -9     139    -146    -31 |      12     32
            |       5       5      81      40     37 |       5
igr   xxxxx |     -24     -24      53       0     -2 |       7     17
            |      11      17      38      71      3 |       2
irf   xxxxx |      -5     -22      48     -53      0 |       8     13
            |       6       6      12      30      4 |       2
jpl   uuuuu |      -6     -10      14      28     -7 |      31     35
            |      37      27      78      45      7 |       4
mit   uuuuu |      -5       3    -145     -25     -3 |      21     26
            |      18      13      50      66      4 |       2
ngs   uuuuu |     -30      27     -16     -50      2 |      11     15
            |      38      21      78      83      5 |       1
sio   uuuuu |      74      45    -293     -40     -6 |      52     54
            |      12      17      97      76      3 |       2


Table 7.1684.0   GPS week: 1684   Day: 0   MJD: 56032.500

                                                         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     -22     173      87      3 |       4     14
emr   xxxxx |      18      74     140     194     -3 |      64     66
esa   uuuuu |      18      10      38     212    -13 |      15     21
gfz   uuuuu |       5     -40     110     -40      9 |      12     18
grg   uuuux |       2      -5     253     -98      5 |      13     33
igr   xxxxx |     -29      -1     108     -16     -4 |      10     18
irf   xxxxx |      -2     -14      31     -10      1 |       9     13
jpl   uuuuu |      28      -6     133      75     -8 |      37     39
mit   uuuuu |      -1      26    -209     -22     -4 |      23     27
ngs   uuuuu |     -67      -5     -56    -194      3 |      12     15
sio   uuuuu |      89      45    -373      70     -4 |      54     56

Table 7.1684.1   GPS week: 1684   Day: 1   MJD: 56033.500

                                                         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     -63      26     -32      2 |       4     15
emr   xxxxx |     -28      63      -2     153      0 |      63     65
esa   uuuuu |      12      -5     100     192    -14 |      13     21
gfz   uuuuu |      24     -44     169       5      3 |      10     17
grg   uuuux |      14     -14     196    -117     12 |      11     32
igr   xxxxx |     -20     -13      49      86      1 |       7     17
irf   xxxxx |      -8     -20      48     -61      6 |       8     13
jpl   uuuuu |       3      29     100      -9    -17 |      34     37
mit   uuuuu |     -21      10    -174    -104     -6 |      22     27
ngs   uuuuu |     -48       7    -146     -21      9 |      11     14
sio   uuuuu |      81      71    -358     -47     -6 |      53     55

Table 7.1684.2   GPS week: 1684   Day: 2   MJD: 56034.500

                                                         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 |     -18     -47      77       0      9 |       2     16
emr   xxxxx |      10      74     156     179      0 |      62     64
esa   uuuuu |     -10      10      97     203      1 |       9     22
gfz   uuuuu |       7     -47     178     -48      4 |       9     17
grg   uuuux |       8       1     138    -210     -9 |      10     32
igr   xxxxx |     -36     -12     -19      20      3 |       5     18
irf   xxxxx |     -16     -19      44     -92     -2 |       7     13
jpl   uuuuu |       1      -2     -21     -17     -5 |      29     35
mit   uuuuu |     -32       0    -167    -103     -5 |      20     26
ngs   uuuuu |      23      22     -64      46     -1 |      10     14
sio   uuuuu |      58      62    -396     -49     -5 |      51     54

Table 7.1684.3   GPS week: 1684   Day: 3   MJD: 56035.500

                                                         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     -48      49     -60      2 |       6     17
emr   xxxxx |      -2      31     116     240    -10 |      66     68
esa   uuuuu |       6     -10      31     117      1 |      13     23
gfz   uuuuu |      -2     -32     214     -59      2 |      14     19
grg   uuuux |      17     -13      -1    -116    -17 |      17     27
igr   xxxxx |      -2     -27      45      67     -2 |      10     18
irf   xxxxx |      -5     -31      39     -55      0 |      10     15
jpl   uuuuu |     -69      18     -29      78     -5 |      32     37
mit   uuuuu |      -9     -10    -122     -50     -8 |      23     28
ngs   uuuuu |       4      42      12     -63      2 |      14     16
sio   uuuuu |      63      41    -275     -37    -11 |      55     57

Table 7.1684.4   GPS week: 1684   Day: 4   MJD: 56036.500

                                                         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 |     -25     -63     103    -125      0 |       4     16
emr   xxxxx |      -7      34     159     -43     -6 |      64     66
esa   uuuuu |     -16      12       0      53      5 |      11     22
gfz   uuuuu |       0     -40     137     -36      1 |      13     18
grg   uuuux |      15     -14     166    -172    -55 |      16     28
igr   xxxxx |     -21     -32      56      25     -6 |       8     17
irf   xxxxx |      -2     -23      50     -67     -3 |       8     12
jpl   uuuuu |     -47     -35       1      63    -13 |      30     35
mit   uuuuu |       9       4    -140       4      1 |      20     26
ngs   uuuuu |       4      25      67      43     -1 |      12     15
sio   uuuuu |      67      43    -255    -113     -5 |      51     54

Table 7.1684.5   GPS week: 1684   Day: 5   MJD: 56037.500

                                                         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 |     -37     -55     139    -186      2 |       4     16
emr   xxxxx |     -37      42     210      55    -12 |      62     64
esa   uuuuu |     -16       1      92      82      3 |      11     22
gfz   uuuuu |      20     -18      38     -79      5 |      13     18
grg   uuuux |      14      -7     135    -133    -81 |      11     32
igr   xxxxx |     -26     -51      55     -88     -7 |       6     17
irf   xxxxx |       2     -26      52     -12     -5 |       6     12
jpl   uuuuu |      15     -38       6      33     -4 |      27     34
mit   uuuuu |      21      -9    -152      41      4 |      19     26
ngs   uuuuu |     -62      47       3     -72     -5 |      11     14
sio   uuuuu |      89      20    -283      40     -3 |      50     53

Table 7.1684.6   GPS week: 1684   Day: 6   MJD: 56038.500

                                                         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 |     -18     -70      47     110      4 |       4     16
emr   xxxxx |     -54      27      57     -80    -10 |      61     63
esa   uuuuu |      -8       3      -3      73     -2 |      10     21
gfz   uuuuu |      33     -45      13      37     -6 |      13     19
grg   uuuux |      12     -12      88    -172    -71 |       3     39
igr   xxxxx |     -30     -30      73     -96     -1 |       5     17
irf   xxxxx |      -5     -21      68     -70      4 |       5     12
jpl   uuuuu |      26     -35     -93     -28      5 |      25     31
mit   uuuuu |       0       0     -49      62     -6 |      19     25
ngs   uuuuu |     -60      51      70     -85      5 |      10     14
sio   uuuuu |      72      35    -110    -143     -8 |      48     51



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