[IGSREPORT-25980] Wk 2004 IGS Final Orbits

acc acc at igs.org
Mon Jun 25 01:45:08 PDT 2018


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2004   (Jun 03, 2018 - Jun 09, 2018)

Contacts: acc at igs.org


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 at each SP3 epoch. 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 with broadcast GPS time, the IGS clocks use
the linear combination of phase-smoothed P1 and P2 pseudorange data to remove
the 1st order ionospheric delay, with no other delay calibrations 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 over each daily arc. 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 10 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:

igs2004[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs2004[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs2004[0-6].cls  IGS GPS clock combination summary report.
igs20047.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs20047.sum      Complete report.

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

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, GRG, MIT, and
    JPL. The other centres are excluded because of poorer consistency, they provide
    broadcast clocks, or clock corrections are not provided (SIO). The clock
    information not used is still compared to the combination for completeness. The
    value of 999999.999999 microseconds, according to the SP3 format convention,
    signifies that no clock solution is available and therefore must not be used.
    
    In general, if an AC does not contribute to the terrestrial reference frame
    (i.e. the SINEX combination), then any corresponding orbits & clocks
    contributed from that AC should not be included with weight in this
    combination. This is done to ensure a high level of consistency between the TRF
    and the orbital frame. However, there is an exception for the clocks if the AC
    is the reference center. In that case, only the clocks from that AC are
    included with weight.
    
    Starting week 1707:
      cod = cof${wwww}[0-6].[clk,snx,sp3] & cod = cof${wwww}7.[erp,sum]

 2. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1582, a new orbit solution from CNES/GRGS (GRG) is included with
    weight. GRG clocks are included with weight starting 12-Aug-2012 (GPS Week
    1701, day 0, MJD 56151), after a procedural change to generate estimates in
    the center-of-figure frame instead of the center-of-mass frame. GRG LOD
    estimates are included for comparison only.

 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   | 31 HARB TIXI HARB KIRI TIXI
                0  |  EMR   | 30 30
                0  |  ESA   | MAL2 MAL2 MCIL TLSE
                0  |  GFZ   | 18 18 GODE MAL2 VILL GODE MAL2 VILL
                0  |  GRG   | 21 21 GLSV KIT3 RIO2 TLSE VILL WIND GLSV KIT3 RIO2
                0  |  GRG   | TLSE TONG VILL WIND
                0  |  JPL   | LAUT
                0  |  MIT   | NLIB NLIB
                1  |  COD   | 30 30 MAL2 TIXI MAL2 TIXI YSSK
                1  |  ESA   | KOUR KOUR
                1  |  GFZ   | 18 18 GODE REUN GODE REUN
                1  |  GRG   | GLSV KIT3 MCIL RIO2 TLSE GLPS GLSV KIT3 MCIL RIO2
                1  |  GRG   | TLSE
                1  |  JPL   | 30 30
                2  |  COD   | SEYG TIXI NAUR SEYG TIXI
                2  |  ESA   | KOUR NKLG KOUR MAL2 NKLG
                2  |  GFZ   | 18 18 REUN PIE1 REUN
                2  |  GRG   | 13 13 GLSV KIT3 LPGS MAL2 GLSV KIT3 LPGS MAL2 TONG
                2  |  JPL   | LAUT
                2  |  MIT   | BOR1 BOR1
                3  |  ESA   | FAA1 MAL2 FAA1 MAL2
                3  |  GFZ   | 18 18 21 BJNM CUSV GODE KERG MAL2 REUN BJNM GODE
                3  |  GFZ   | KERG MAL2 REUN
                3  |  GRG   | 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
                3  |  GRG   | 22 23 24 25 26 27 28 29 30 31 32 2 3 5 6 7 8 9 10
                3  |  GRG   | 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
                3  |  GRG   | 28 29 30 31 32 KIT3 KIT3
                3  |  JPL   | ARTU CUSV ZAMB
                3  |  MIT   | MAL2 MAL2
                4  |  COD   | TIXI REUN SEYG TIXI TLSE
                4  |  EMR   | TLSE CHUR TLSE YAKT
                4  |  GFZ   | 18 17 18 BJNM GODE MAL2 REUN BAKO BJNM GODE MAL2
                4  |  GFZ   | REUN UNSA
                4  |  GRG   | 1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                4  |  GRG   | 21 22 23 24 25 26 27 28 29 30 31 32 1 2 3 5 6 7 8
                4  |  GRG   | 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
                4  |  GRG   | 26 27 28 29 30 31 32 KIT3 KIT3
                4  |  JPL   | FAA1 FAA1
                4  |  MIT   | BJNM MAL2 BJNM MAL2
                5  |  COD   | KOUR TIXI KOUR TIXI
                5  |  ESA   | KOUR KOUR
                5  |  GFZ   | 18 18 FAA1 GODE MAL2 REUN FAA1 GODE MAL2 REUN UNSA
                5  |  GRG   | GLSV KIT3 GLSV KIT3 MAL2 TONG
                5  |  JPL   | FAA1
                5  |  MIT   | FAA1 MAR6 FAA1 MAR6
                6  |  COD   | TIXI IRKJ LHAZ TIXI
                6  |  ESA   | 22 FAA1 MAL2
                6  |  GFZ   | 18 21 17 18 21 GODE HYDE REUN GODE HYDE REUN
                6  |  GRG   | KIT3 RIO2 HYDE KIT3 RIO2 TONG WIND
                6  |  MIT   | BJNM COCO BJNM COCO

 5. 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 AC clocks are
    corrected for the radial offsets of their satellite orbits compared to the
    combination.

 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
               ----+--------+---------------
                2  |  JPL   |   6
                2  |  SIO   |   6

 7. Velocity changes were estimated to alleviate the effects of modeling problems,
    experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G01 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |
           PRN G06 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |

 8. 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.
    
    Starting 07-Oct-2012 (GPS Week 1709, day 0, MJD 56207) all IGS products, are
    based on the updated IGS08 frame (IGb08). For more information see IGSMAIL
    #6663.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) all IGS products,
    are based on the IGS realization of the ITRF2014 reference frame (IGS14).
    For more information see IGSMAIL #7399.

 9. Small rotations were applied to all the AC orbit and ERP values in order to
    align them to the current IGS reference frame. These RX, RY and RZ rotations
    were estimated in the IGS SINEX combination process, performed by the IGS
    Reference Frame Coordinator at the Institut Geographique National (IGN).
    Starting on 19-Aug-2012 (GPS Week 1702; MJD=56158), ACs began contributing
    products based on 1d SINEX integrations. As a result, the SINEX combinations
    are now done daily instead of weekly, and the associated daily rotations are
    applied here to the orbits and ERPs. 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 | Day |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+-----+---------------------------------------------------
       COD  |   0 |     .3     .4     .2      13     11    -17    -.21
       EMR  |   0 |    2.8  -18.4    4.7     -10     -2     51     .23
       ESA  |   0 |    -.5    -.6     .2     -13      0     16    -.41
       GFZ  |   0 |     .1    -.0    -.3      -3    -25     14    -.01
       GRG  |   0 |    5.8   -8.9    5.9      36     24      9    -.23
       JPL  |   0 |    8.3  -14.6    5.6      -7     28     -8    -.13
       MIT  |   0 |    4.5  -10.4    3.9     -33      9     28     .57
       NGS  |   0 |   -2.1   -8.2     .7      -7    -18    -73    -.27
       SIO  |   0 |    3.1   -8.4  -15.4      -3     -1      3    -.12

       COD  |   1 |     .0     .4     .4      15     11     -6    -.40
       EMR  |   1 |   -6.4   -8.3    6.1     -15      5      7     .03
       ESA  |   1 |    -.1    -.4     .5      -7     21     16    -.34
       GFZ  |   1 |    -.1     .1    -.1     -14    -22     -6    -.03
       GRG  |   1 |    2.8   -9.8    -.0      29     -2     32    -.31
       JPL  |   1 |   -4.0  -11.8    5.5       2      9     -9    -.29
       MIT  |   1 |    1.9  -14.0    3.4     -16     42     11     .42
       NGS  |   1 |     .6  -13.7    5.2     -44    -39    -63    -.21
       SIO  |   1 |   -2.1   -9.4   -3.4      -8      4      0    -.28

       COD  |   2 |    -.3     .2    1.1      19     24    -18    -.47
       EMR  |   2 |   -2.3   -3.3    2.9     -13     -2     14    -.09
       ESA  |   2 |     .3    -.4    -.0      -5      5      8    -.49
       GFZ  |   2 |    -.5     .0     .8       1     -3      6    -.24
       GRG  |   2 |    -.5   -7.8   -1.3      51     -7     50    -.40
       JPL  |   2 |   -2.1  -10.3    4.3       8     -9     18    -.29
       MIT  |   2 |   -2.4  -10.3     .6     -19     42     19     .35
       NGS  |   2 |   -9.7   -3.4   10.6      -9    -43    -63    -.24
       SIO  |   2 |    2.4   -1.7   -9.2      -9     15      8    -.05

       COD  |   3 |     .1     .1    1.0      19     11     -1    -.55
       EMR  |   3 |   -3.3   -6.7    3.4      -9      3     46    -.07
       ESA  |   3 |    -.1    -.6     .6      20     10     17    -.43
       GFZ  |   3 |     .1    -.4     .6     -14    -23     23    -.37
       GRG  |   3 |    2.1   -7.0   -1.0      46    -12     72    -.37
       JPL  |   3 |     .1   -3.5    -.4       4     12     10    -.32
       MIT  |   3 |     .1   -6.6    2.9       0     34     21     .40
       NGS  |   3 |   -2.1   -4.7    8.5      -8    -62    -56    -.28
       SIO  |   3 |    -.4   -1.5   -7.3       2     10      0    -.17

       COD  |   4 |    -.1    -.0    1.1      18     26      5    -.33
       EMR  |   4 |    3.8   -8.6    3.5      -9    -11     38    -.01
       ESA  |   4 |     .1    -.0     .7       0     16     -1    -.21
       GFZ  |   4 |     .3    -.0     .5      13     -6      8    -.21
       GRG  |   4 |    4.2   -2.5   -2.1      48    -17     57    -.37
       JPL  |   4 |    4.2   -4.0    2.6     -12     19      4    -.15
       MIT  |   4 |    4.1   -6.0    3.7     -14     35     11     .55
       NGS  |   4 |    -.5   -6.6    3.6      -1    -33    -71    -.20
       SIO  |   4 |    3.4   -3.8   -4.3     -12      5     -6    -.04

       COD  |   5 |     .8     .5    1.5      16      2     -5    -.53
       EMR  |   5 |    1.7    -.9   -4.5     -11     31     25     .02
       ESA  |   5 |    -.3     .0     .4      12      3      5    -.39
       GFZ  |   5 |    -.6    -.2     .3     -16     16      4    -.03
       GRG  |   5 |    4.4   -3.6   -2.6      13     -4     51    -.39
       JPL  |   5 |    2.6   -4.2   -8.3      15     22     -2    -.55
       MIT  |   5 |    4.0   -6.1     .4      -9     35     12     .27
       NGS  |   5 |    5.2   -3.5    2.7      -1    -26    -19    -.38
       SIO  |   5 |    3.7   -2.7    -.4      -7     -9     -3    -.21

       COD  |   6 |     .4     .3     .9      14      1     -5    -.38
       EMR  |   6 |    4.1   14.9  -14.7     -21     19     17     .02
       ESA  |   6 |     .3    -.2    -.1      -5     15      6    -.33
       GFZ  |   6 |     .4    -.5    -.0     -21    -27      8    -.23
       GRG  |   6 |    2.8   -4.6  -15.0      50     -5     49    -.30
       JPL  |   6 |    4.0   -5.7   -7.2      -1      2      1    -.51
       MIT  |   6 |     .2   -6.0   -5.1     -41     19     17     .47
       NGS  |   6 |   -5.1   -4.5   -2.4      17     17    -57    -.23
       SIO  |   6 |   -2.5   -2.2   -7.7       6      1      2    -.12


10. As inidicated in the previous remarks, the IGS final orbits are aligned to the
    IGS reference frame by pre-aligning each AC orbit with the 3 corresponding
    SINEX rotations. This approach began 27-Feb-2000 (GPS Week 1051-0; MJD 51601).
    Starting sometime prior to 19-Aug-2012 (GPS Week 1702; MJD=56158), the orbit
    combination procedures used an incorrect sign convention to apply the SINEX
    RX and RY values to the AC orbits.
    
    Also starting 27-Feb-2000 (GPS  Week 1051-0; MJD 51601), the AC orbits were
    pre-aligned using rotations derived from differences between AC and IGS
    combined x and y polar motion. These ERP rotations were intended to
    approximate day-to-day variations of the AC orbital frames when only weekly
    averaged AC TRF rotations were available (For more details, see IGSMAIL
    #2750). With the change to daily SINEX integrations starting 19-Aug-2012, the
    ERP rotations are no longer needed/applied.

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; from GPS Week 1632 through 1648 the JPL solution is excluded from the
    weekly SINEX combination.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) the absolute antenna
    model file has been updated to igs14.atx to be consistent with IGS14.
    See IGSMAIL #7399 for more information
        ftp://igs.org/pub/station/general/igs14.atx


ORBIT COMBINATION AND EVALUATION STATISTICS:                                    
--------------------------------------------                                    

Most combination statistics are with respect to the combined orbits and
consist of seven 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 1.2004.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2004.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 2.2004.[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 3.2004.[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 part, 
Table 5, is similar to Table 4 and contains daily precise navigation
statistics (Tables 5.2004.0-6). The sixth part, Table 6, is a weekly
summary of daily ERP combination statistics. The seventh part, Table 7,
contains the daily ERP statistics. But this is not the IGS official ERP
combination products (which come from the accompanying SINEX combination)
but provided to check combination consistency, etc.

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 2004 summary.                       (Jun 03, 2018 - Jun 09, 2018)

Table 1.2004.a   GPS week: 2004   MJD: 58272.000-58278.000

         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  260|    0     0     0    12   -17    -8  -.05   10    9 |    -623       0      6     89
        |    0     0     1    13    12     4   .02           |     324     448
emr   80|    0    -1     1    -2     0    25   .18   13   13 |  137654      65     14    108
        |    2     6     3     6    15    17   .02           |     310     488
esa  150|    0     0    -2     0     1   -13  -.08    9    8 |    -964    -573      8    204
        |    0     1     1    12    10    13   .03           |     374     742
gfz  178|    0     2     3     0     0   -16   .05   12   11 |    -198     -24     12    136
        |    0     1     1    17    12    23   .02           |     159     329
grg  106|    2     0    -5    -4     0    10  -.05   11   11 |     -70      98 263397 285822
        |    0     0     3    13    17    12   .02           |     152     167
igr  n/a|    0     1     0   -10   -11   -17  -.07    5    5 |    2808     260     11     73
        |    0     0     1     7    13    12   .02           |     625     455
jpl   80|   -1     0     1     2     9    24   .17    8    8 |  133471     155      7     96
        |    0     1     1     7    16    23   .01           |     276     449
mit  349|    0    -1    -1   -11     5    10  -.08   12   12 |     251    -138     45    241
        |    0     0     0    16    36    19   .03           |     233     215
ngs  205|   -1     0     1    12     1    -2  -.08   10    9 |    -603     -21   1120   2375
        |    0     1     2     8    13    11   .03           |     265     331
sio  339|    0     0     2   -17     4   -27  -.11   14   14 |     ---     ---    ---    ---
        |    0     0     2     5    37    31   .03           |     ---     ---


Table 1.2004.b   GPS week : 2004   MJD: 58272.000-58278.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.2004.0   GPS week: 2004   Day: 0   MJD: 58272.000                            

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  261|    0     0     3    29   -35     0  -.06   12    9 |    -566    -111      7     89
emr   80|    0    -8     3    -1    -3    18   .16   15   14 |  137827      27     17    111
esa  150|    0     0    -3   -13   -11     3  -.09    8    8 |    -904   -1048      9    201
gfz  181|    0     3     3    26    -4    -6   .03   11   11 |    -392     279     11    112
grg  111|    1     1     0    -5    24     0  -.07   12   11 |     -89      64      8    148
igr  n/a|    0     2    -1     1   -10   -15  -.06    5    5 |    2646    -168     12     71
jpl   80|    0    -2     1     1    28   -18   .18    9    9 |  133577      75      8     83
mit  350|    0     0    -1   -36     9    33  -.05   13   12 |    -137      -1     48    268
ngs  205|   -1     2    -4    19    -3    10  -.04   10    9 |    -598     -55    767   2181
sio  344|    0     0     0   -24    11     0  -.08   14   14 |     ---     ---    ---    ---

Table 2.2004.1   GPS week: 2004   Day: 1   MJD: 58273.000                            

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  257|    0     0     0    -1   -21    -5  -.09    8    8 |    -380    -200      7     96
emr   80|   -3    -2     2    -7     1     6   .21   13   13 |  137832    -129     16     96
esa  150|    0     0     0   -14     0    -6  -.11   11    9 |    -496    -400      8    198
gfz  178|    0     3     2    -3    -6    -6   .03   12   10 |    -275     295     12    137
grg  111|    2     0    -4   -16    -3    12  -.06   12   11 |      86      -2      9    122
igr  n/a|    0     1    -1    -4   -33   -19  -.07    5    5 |    2444     -10     12     62
jpl   80|   -1     0     1    14    21    11   .16    8    8 |  133440     142      8     89
mit  349|    0    -1    -2    17    16    20  -.07   12   12 |     323    -245     50    226
ngs  201|    0     0     1    10   -17    -2  -.04   10    8 |    -392    -183   1347   2504
sio  340|    0    -1     0   -18    23   -24  -.08   14   14 |     ---     ---    ---    ---

Table 2.2004.2   GPS week: 2004   Day: 2   MJD: 58274.000                            

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  260|    0     1     1    28   -17   -14  -.05   11   10 |    -983     623      7     86
emr   80|    0    -3     1    -7     0    25   .16   12   12 |  137234     530     14    117
esa  150|    0     2    -3    -3     0   -17  -.11    9    8 |    -597   -1706      9    228
gfz  175|    1     4     2    -4    11     6   .05   12   11 |     -17    -486     11    160
grg  100|    1     0    -7     5    -1     3  -.02   11   11 |    -383     468      9    144
igr  n/a|    0     0    -1   -14   -17   -30  -.07    5    5 |    2053     741     11     70
jpl   80|   -2    -1     3    -1   -21    44   .16    8    8 |  133107     581      7    111
mit  349|    0    -1    -1   -21    13     0  -.05   13   13 |       9     170     47    263
ngs  202|    0     0     2    10    13   -19  -.09   10    9 |    -793     309   1304   2530
sio  336|    1     0     0    -8     6   -40  -.11   16   13 |     ---     ---    ---    ---

Table 2.2004.3   GPS week: 2004   Day: 3   MJD: 58275.000                            

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  261|    0     0    -1    20    -1   -11  -.03   10    8 |    -320    -492      7     90
emr   80|    0    -2     3     2    10    14   .18   12   12 |  137433    -543     13     97
esa  150|    0     0    -1     6    19   -13  -.09    9    9 |    -954    -546      8    193
gfz  179|   -1     3     2   -13     4   -21   .08   11   10 |    -357     -15     12    128
grg  104|    2     0    -3    -4     0    22  -.07   11   10 |       0       0 843738 999999
igr  n/a|    0     0     0   -13     9   -20  -.06    5    5 |    2552    -301     11     58
jpl   80|    0     0     2    -2    13    16   .15    8    8 |  133432    -558      8     99
mit  349|    0     0    -1   -15   -40    27  -.06   12   12 |     274    -520     43    224
ngs  206|   -1    -1     2    14    22     4  -.09   11   10 |    -360    -426   1296   2783
sio  341|    0     0     0   -12   -45   -19  -.11   13   13 |     ---     ---    ---    ---

Table 2.2004.4   GPS week: 2004   Day: 4   MJD: 58276.000                            

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  260|    0     1     0     7   -12    -6  -.03   10   10 |    -336    -417      7     86
emr   80|    0    -4     2     7   -31    15   .16   12   12 |  137364     885     12    111
esa  150|    0     0    -2    -5    -9   -38  -.06    8    8 |   -1035     359      9    192
gfz  178|    0     2     2    -2   -17   -44   .06   12   11 |    -137      52     13    155
grg  112|    2     0    -7    -1   -21    31  -.05   11   12 |       0       0 999999 999999
igr  n/a|    0     0     0   -11   -10   -18  -.07    6    6 |    2661     849     12    107
jpl   80|    0     0     3    -6     6    34   .16    8    8 |  133173     838      6     92
mit  349|    0     0     0    -4    65    19  -.08   11   11 |     421    -161     40    244
ngs  210|   -1     0     0    14     0    -4  -.08    9    8 |    -367    -297   1023   2191
sio  341|    0     0     3   -19    27    -4  -.15   13   13 |     ---     ---    ---    ---

Table 2.2004.5   GPS week: 2004   Day: 5   MJD: 58277.000                            

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  260|    0     0     0     0    -4   -10  -.05    8    8 |    -638       7      6     83
emr   80|   -1    -3     0    -2    18    47   .18   11   11 |  138084     -22     12    121
esa  150|    0     0    -1    19     6   -13  -.07   11    9 |   -1126    -963      9    188
gfz  177|   -1     1     5    16    17   -49   .06   13   12 |    -227     173     14    133
grg   95|    2     0    -5   -22    17     9  -.06   11   11 |       4      85      9    140
igr  n/a|    0     1     0    -8     1   -26  -.10    7    7 |    3426     552     13     90
jpl   80|   -1     0     0     5    17    36   .19    8    8 |  133903      54      7     98
mit  349|    0    -1     0    -4   -39    -8  -.13   12   14 |     522    -154     48    222
ngs  208|    0     0     3    -4    -6   -13  -.12   11   10 |    -636     -12    870   2189
sio  330|    1     0     4   -22   -48   -12  -.12   14   14 |     ---     ---    ---    ---

Table 2.2004.6   GPS week: 2004   Day: 6   MJD: 58278.000                            

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  263|    0    -1     0     0   -31   -11  -.04    9    9 |   -1138     592      7     97
emr   80|    3    11    -5   -11     0    50   .21   18   16 |  137809    -292     16    109
esa  150|    0    -1    -1     6     6    -6  -.05    8    8 |   -1636     293      8    231
gfz  179|    0     0     6   -23   -10     7   .04   12   10 |      18    -471     13    130
grg  111|    2     0   -10    16   -20    -2  -.06   11   10 |    -109      74     10    204
igr  n/a|    0     0     1   -19   -18     7  -.05    4    4 |    3879     158     10     59
jpl   80|    0     0     2     7     2    45   .18    8    8 |  133667     -41      7    104
mit  349|    0    -2    -1   -16    15   -16  -.10   12   11 |     351     -56     41    244
ngs  208|   -2     0     2    20     3    10  -.06    9    8 |   -1078     511   1233   2251
sio  342|    0    -1     6   -14    52   -91  -.16   13   14 |     ---     ---    ---    ---

       
       
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 3.2004.0   GPS week: 2004   Day: 0   MJD: 58272.000                            

        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   17    5    9   10    5    6    9    8   10    3 |   303  303  304  305  216  304  305  304  306  301   304
   2  |    9   13    4   12   17    4    9   10   11   14    3 |    19   25   17   17   21   15   21   16   18   14    16
   3  |    9   11    9   12    6    3   10    8    6    9    3 |    22   32   20   24   20   22   32   20   24   22    23
  X4  |    3  ---  ---  ---  ---   18  ---  ---  ---  ---    0 |    55  ---  ---  ---  ---   52  ---  ---  ---  ---    57
   5  |    6   10    9    8    8    3   10   16    8   18    3 |    31   34   31   25   29   27   34   26   30   32    29
   6  |    9    9    6    8   11    4    8    8    9   12    3 |   430  295  431  430  293  431  431  432  430  434   431
   7E |    7   14    6    9   12    4   11    8    9    8    3 |    70   57   71   73   76   70   70   72   72   71    71
   8  |    8   11    7   10   14    4    8   10    9    9    3 |    19   22   20   20   24   17   23   20   21   19    19
   9  |    8    9    6    8    8    3    6    6    7    8    2 |    25   31   27   24   26   25   31   26   27   28    26
  10  |    9    9    8    7    7    3   10    9    6    8    3 |    35   38   31   36   32   34   37   38   34   33    34
  11E |    6    9    8   10   13    4    7    7    7    9    3 |    48   46   45   48   49   46   44   48   49   46    46
  12  |    8   20    6   14   13    5    9   10   14   19    4 |    31   36   28   34   31   30   32   33   32   32    30
  13  |   11   12    8   12   12    5   11   14   12   17    4 |    25   36   24   35   23   29   32   32   34   34    28
  14  |    8    8    9   14   11    5   10   13   11   17    4 |    31   32   29   36   32   32   32   33   35   33    31
  15  |    9   15    9   15    7    6   11   24   13   17    4 |    49   52   50   41   50   42   52   44   40   44    46
  16  |   10   22    7   15   18    7    7   12   13   21    4 |    28   28   28   34   25   30   28   35   35   34    29
  17  |    5   16    7   12   12    6   11   13   10   13    4 |    26   29   23   28   23   25   25   28   30   23    24
  18  |   11   13    9   13   10    4    7   10    9   10    3 |    97   95   95   95   96   96   96   97   96   96    96
  19  |    8   16    7   12   14    5    7   12   10   14    3 |    27   32   23   26   25   23   28   25   25   23    24
  20  |    6   11    9    9    7    4    8   16   10   16    3 |    17   18   14   21   15   16   19   27   19   25    17
  21  |    7   15   10   11   13    4    9   18   10   19    4 |    23   26   25   29   22   23   23   28   26   24    22
  22  |    6    7   10   10    6    4    6   13    8   15    3 |    26   29   23   29   24   25   26   24   27   30    25
  23  |   12   20    7   15   12    6    7   22   12   16    4 |    20   20   20   30   19   23   23   30   27   29    22
  24E |   12   14   12   11   15    3    7   11    9   16    4 |    26   27   30   26   30   25   25   23   25   21    25
  25  |    7   16    6    7   10    3    9    7    9   13    3 |    17   26   18   18   19   16   22   16   16   20    17
  26  |    6    7    5    8   11    5    6    9    6    8    2 |    32   33   33   29   34   29   33   25   29   31    31
  27  |    9   10    7    9   15    5    7    9    8    9    3 |    18   20   19   19   23   16   20   19   18   19    18
  28  |   11   13    6   13   11    6    9   14   10   15    4 |    18   22   16   24   17   18   22   21   20   16    17
  29  |    7   26    5   13   18    6   10   11   13   13    4 |    26   28   25   29   26   26   26   29   31   25    25
  30E |   24   34   11   14   15    6   22   16   19   16    6 |    66   65   53   57   52   56   65   57   52   61    56
  31E |   44   12    8   17   22    9    7   17   16   14    7 |    73   64   60   63   65   62   63   59   64   59    62
  32  |    8    7   10    8    7    3    6    7    6   12    2 |    27   33   30   30   30   29   33   28   30   34    30
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   12   15    8   11   12    5    9   13   10   14      |T   55   52   53   55   47   53   56   55   55   55    54
 WRMS |    9   14    8   11   11    5    9   12    9   14      |NE  54   52   54   56   45   53   57   56   56   55    54
 MEDI |    8   13    7   11   12    4    8   11    9   14      |MD  27   32   28   29   26   27   32   28   30   31    28

Table 3.2004.1   GPS week: 2004   Day: 1   MJD: 58273.000                            

        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    9    8    9   10    3    5    9    9   10    3 |   359  360  361  361  242  361  362  362  362  359   361
   2  |    7   10    8    9   14    3    8   11   10   14    3 |    18   19   16   16   20   15   17   16   16   11    15
   3  |    7    9   10   11    6    4   10    8    6   10    3 |    15   28   15   19   15   17   29   16   22   20    18
  X4  |    2  ---  ---  ---  ---   25  ---  ---  ---  ---    0 |    56  ---  ---  ---  ---   51  ---  ---  ---  ---    57
   5  |    9    8   10    9    8    4    9   14   11   16    3 |    26   25   23   21   24   22   26   23   22   28    23
   6  |    5   10    7   11   11    3    7   10    7    8    3 |   331  413  329  332  410  330  329  327  328  331   329
   7E |    9   20    8   10   19    5    8   11    9    9    4 |    48   44   53   54   50   51   51   52   53   53    51
   8  |    7   11    7    9   12    4    7   12    5    8    3 |    19   24   20   21   23   18   23   21   20   18    19
   9  |    8   11    8    9    8    4    6    6    7   14    3 |    20   28   21   20   21   19   26   22   20   29    22
  10  |    6    8   10    9    7    3    8    9    4    9    2 |    27   33   27   29   27   27   32   29   28   26    28
  11E |    7    9    7   10   11    4    6    8    7    9    2 |    37   39   34   41   42   37   38   38   36   36    37
  12  |    6   19    8   14   11    4    7   10   12   15    4 |    24   25   22   29   24   24   25   26   25   26    24
  13  |    8   13   12   13   10    7   11   14   15   17    4 |    20   27   19   27   17   22   25   24   24   25    21
  14  |    7    9    8   17   12    5    9   14   10   17    4 |    26   29   26   29   26   25   28   27   27   28    26
  15  |    9   13   10   15    9    7   10   22   13   19    4 |    34   37   35   34   34   31   37   36   32   35    33
  16  |   10   21    7   17   17    8    7   14   12   21    5 |    26   23   22   31   21   26   24   27   27   27    23
  17  |    8   13    8   15   12    5   11    9   10   11    3 |    25   26   20   29   23   24   22   27   28   24    23
  18  |    8   10    8   11   21    4    8    9    7   11    3 |   120  120  119  121  115  120  122  124  121  120   120
  19  |   10   16    8   14   11    5    7   12    9   15    4 |    22   28   21   27   21   21   23   24   22   22    21
  20  |   10   13    9   11    9    4    8   15    9   17    4 |    16   16   13   14   12   12   13   19   14   22    13
  21  |    9   11    7   14   15    5    9   16   10   19    4 |    18   23   18   23   18   18   21   20   21   18    17
  22  |    6    7    9    9    5    5    7   13    9   15    3 |    19   24   20   25   21   22   23   21   22   26    21
  23  |   11   19    9   16   12    8    7   22   12   19    5 |    18   17   16   24   14   17   18   26   20   24    17
 X24E |   10  ---   12   12   12    4    8   10    8   12    4 |    18  ---   23   22   23   19   19   21   21   16    19
  25  |    8    7    7    7    8    4    6    7    8   10    2 |    19   23   19   19   20   16   21   16   16   19    18
  26  |   10    7    8   10   10    4    5    7    7   10    3 |    31   34   32   31   31   30   33   28   30   30    30
  27  |   10   12    7    9   14    3    8   10    5    9    3 |    18   21   20   19   22   17   20   18   18   20    18
  28  |   10   11    7   15   13    7    7   12   11   13    4 |    15   23   17   25   16   18   21   22   20   18    18
  29  |    9   21    6   11   17    5    7   10   11   14    4 |    23   23   20   24   24   21   22   26   23   22    21
  30E |    9   16   43   12   15    7   11   14   21   10    7 |    40   34   66   35   40   34   41   32   33   34    37
  31E |    6   12    5   10   12    5    8   12    9    9    3 |    45   44   42   45   41   42   42   43   42   44    43
  32  |    4    7   11    9    8    3    5    7    7   13    2 |    19   26   20   23   21   21   23   20   21   28    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13   11   12   12    5    8   12   10   14      |T   48   54   48   50   47   47   50   49   48   49    48
 WRMS |    8   13    9   10   11    5    8   12    8   14      |NE  50   56   49   52   48   49   52   51   51   52    50
 MEDI |    8   11    8   11   11    4    8   11    9   13      |MD  23   26   21   27   23   22   25   26   23   26    22

Table 3.2004.2   GPS week: 2004   Day: 2   MJD: 58274.000                            

        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    8    9    9   11    4    6   11   10   12    3 |   254  254  255  250  220  254  255  251  253  256   254
   2  |   11    9    8   12   15    5    7   11   11   13    3 |    19   17   18   19   21   16   16   16   17   15    15
   3  |    8    8   10   12    6    3    9   10    9   13    3 |    20   27   18   18   16   17   28   16   22   18    19
  X4  |    2  ---  ---  ---  ---   25  ---  ---  ---  ---    0 |    72  ---  ---  ---  ---   65  ---  ---  ---  ---    71
   5  |    9    7   10   11    9    5    9   13   11   18    4 |    26   27   28   20   27   22   26   22   24   32    24
  X6  |   28  ---   17   25  ---   13   90   39   40   67   15 |  9999  --- 9999 9999  --- 9999 9999 9999 9999 9999  9999
   7E |   13   14    6    9   17    6    8   14   12    8    4 |    36   26   36   36   38   39   38   40   42   40    37
   8  |   12    9    6    8    8    2    6   13    8    9    3 |    17   19   16   17   19   15   18   18   18   18    16
   9  |   14   12    8    7    9    4    7    6    5    8    3 |    27   31   24   23   26   23   28   22   23   25    24
  10  |   10   10    9    9    6    5    9    8    7   13    3 |    30   33   25   31   27   30   36   32   29   35    30
  11E |   11    6    9   11   14    4    6   10    8   12    3 |    33   33   32   35   37   32   33   32   35   31    33
  12  |   11   18    9   13    9    6    7   10   12   18    4 |    30   31   26   33   28   28   32   29   30   25    28
  13  |   11   11   10   15    8    4   10   16   12   17    4 |    22   29   21   32   21   25   28   28   32   29    25
  14  |    7    9    9   14   10    4    8   14    9   20    4 |    27   30   28   31   26   29   27   34   31   34    28
  15  |    8   12   10   16   10    7   10   25   11   17    4 |    38   42   41   36   42   34   43   39   34   38    38
  16  |   12   20    6   16   15    8    7   13   12   19    4 |    23   18   19   25   18   21   17   23   21   22    18
  17  |   12   16    9   13   10    5   12   12   10   18    4 |    19   27   19   26   22   20   19   25   25   24    20
  18  |   10    9   10   14   10    5    8    8    9   11    3 |    91   90   90   87   91   91   91   90   88   94    90
  19  |    9   19    9   13   11    6    9   13    9   31    5 |    20   25   19   22   20   17   19   22   18   31    18
  20  |    9   12    9   11    8    4    7   14   11   16    3 |    15   15   11   14   11   13   15   20   15   21    12
  21  |   11   10    7   14   12    6    9   14   10   17    4 |    19   21   19   22   21   20   21   21   21   19    18
  22  |    9    8    9   11    7    4    5   15   10   14    3 |    17   19   15   24   14   17   20   20   22   22    18
  23  |   16   20    9   16   12    7    7   22   12   18    5 |    21   18   18   25   18   19   22   29   19   25    18
  24E |   18   15   12    6   13    4    7   14    7   23    4 |    21   24   25   21   23   19   21   21   22   33    20
  25  |    9    9    6    7    6    5    6    9    7   13    2 |    16   24   17   19   17   15   20   16   16   21    17
  26  |   11    7    7   10   11    4    6    7    4    9    3 |    34   35   35   36   33   36   36   35   36   36    34
  27  |    8    9    5    8   11    3    6    9    8    7    2 |    16   19   16   17   21   15   17   17   17   17    16
  28  |   10   10    7   16   11    7    8   13    9   21    4 |    16   23   16   26   16   18   21   22   21   24    18
  29  |   12   23    7   14   17    6    7   11   11   15    4 |    21   19   15   25   20   18   18   24   20   22    17
  30E |   18    8   14   15   18    6    7    8   10    9    4 |    43   42   43   39   44   41   43   41   42   43    41
  31E |    8   11    6   11   13    5    7   10   10   10    3 |    36   37   37   37   37   37   36   34   37   37    36
  32  |    5    6    9   10    8    4    5    7    7   15    3 |    22   27   20   27   23   21   25   20   21   30    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   12    9   12   11    5    8   13   10   16      |T   35   36   33   35   33   34   35   35   35   37    34
 WRMS |   10   12    8   11   11    5    8   13    9   13      |NE  35   36   33   36   32   34   35   35   34   37    34
 MEDI |   10   10    9   12   10    5    7   12   10   15      |MD  22   27   20   25   22   21   25   23   22   25    23

Table 3.2004.3   GPS week: 2004   Day: 3   MJD: 58275.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   19   23   13   15  ---    5   20   18   28   13    7 |   626  622  625  621  ---  623  624  628  619  625   624
   2  |    8    9    8   10   16    4    9   11   12   15    4 |    24   22   23   24   25   22   23   22   23   20    22
   3  |    6    7   10    9    7    3    8    9    9   10    3 |    24   30   20   27   21   23   30   21   25   25    24
  X4  |    1  ---  ---  ---  ---   45  ---  ---  ---  ---    0 |    64  ---  ---  ---  ---   42  ---  ---  ---  ---    64
   5  |    7    7   10   10   10    5    8   15   11   18    3 |    27   29   27   23   30   25   32   26   22   34    27
   6  |    9   11    8    7   13    4    7   11    7    7    3 |   526  873  525  522  874  523  525  518  527  521   525
   7E |   13   15    7   13   14    6    7   11   11    8    4 |    29   40   35   37   32   34   34   35   38   36    33
   8  |    7    8    7    9    9    3    7   12   10    7    3 |    19   21   19   18   24   18   20   20   20   19    18
   9  |    8    8    8    9    7    5    7    6    6    9    2 |    26   32   29   28   27   27   32   27   27   31    28
  10  |    8    8   10    9    5    3    8    8    9    9    3 |    24   32   23   26   24   25   31   29   25   29    26
  11E |    7   13    7    8   10    4    7    8   11    7    3 |    34   37   34   35   35   34   36   37   34   36    35
  12  |    6   19    7   14   11    6    7   10   14   12    4 |    28   29   25   28   27   25   29   30   27   27    27
  13  |   11    9   11   12    9    4   11   17   13   16    4 |    22   30   20   31   22   26   30   30   31   29    26
  14  |    8    9    9   13    9    4    8   13   11   18    4 |    22   26   22   27   22   25   24   31   29   30    24
  15  |    8   11   11   12    9    5   11   22   14   19    4 |    40   44   43   35   43   36   44   39   33   40    39
  16  |   10   22    8   14   14    6    7   15   14   22    4 |    25   20   18   24   21   20   20   25   25   24    20
  17  |    8   14    7   13   11    5   10   11    8   13    3 |    24   26   23   32   25   25   24   27   26   26    24
  18  |    8    9    8    9    7    3    9    9   11    9    3 |    70   67   66   64   68   67   68   69   67   71    68
  19  |   10   17    8   12   10    4    8   12    9   14    4 |    22   25   25   30   24   24   23   25   23   22    23
  20  |   10   10   10   10    7    4    8   12   12   19    4 |    22   22   18   25   19   21   21   27   24   29    21
  21  |    6   11    9   12   13    4    8   13   12   20    4 |    19   21   20   23   23   20   21   20   23   22    18
  22  |    8    6   10   10    6    4    5   13   12   14    3 |    18   20   16   24   18   19   20   19   21   24    18
  23  |   11   18    8   14   13    8    7   22   11   15    4 |    19   18   19   27   19   22   20   29   24   26    20
  24E |   13   14   10    7   11    3    8   10    7   10    3 |    25   31   32   27   28   25   28   28   27   24    27
  25  |    7    9    5    8    9    4    6    9   11    9    3 |    20   28   22   24   22   21   26   22   23   24    22
  26  |    8    9    5    8    9    4    6    7    7    9    2 |    27   28   29   26   31   26   29   27   29   27    27
  27  |    8   11    5    9   10    4    7    8    9    8    3 |    20   22   19   19   25   18   21   23   22   23    20
  28  |    9   11    8   15   12    6    9   13   10   17    4 |    22   28   25   28   24   23   27   28   24   26    24
  29  |    8   23    5   15   17    7   10   12   15   11    4 |    22   22   20   25   23   22   21   28   26   23    21
  30E |   15   10   15   15   13    6    6    7    9    7    4 |    29   28   31   27   26   27   28   26   29   28    26
  31E |   22    9    6   12   13    5    8   11   12   13    4 |    35   36   36   39   35   37   38   36   40   39    36
  32  |    7    7   11    5    7    5   10    8    9   11    3 |    23   27   26   29   24   27   27   24   28   28    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   12    9   11   11    5    8   12   11   13      |T   61   75   61   63   55   61   63   63   63   64    61
 WRMS |    8   12    9   10   10    5    8   12   10   13      |NE  67   83   67   69   60   66   69   69   68   70    67
 MEDI |    8   10    8   10   10    4    8   11   11   12      |MD  24   28   25   27   24   25   28   27   26   27    25

Table 3.2004.4   GPS week: 2004   Day: 4   MJD: 58276.000                            

        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   11    8    7   11    5    7    8    7   10    3 |   209  207  208  210  327  208  207  210  210  208   208
   2  |   15   10    5   16   17    5    7   11   11   13    4 |    30   28   28   29   30   25   24   23   24   21    25
   3  |   10    9   10   10    7    5    8    7    8    8    3 |    26   34   24   26   23   24   32   22   23   26    25
  X4  |    1  ---  ---  ---  ---   21  ---  ---  ---  ---    0 |    29  ---  ---  ---  ---   27  ---  ---  ---  ---    30
   5  |    8    8    9    9    8    5   10   11    9   18    3 |    30   29   28   29   29   26   32   25   26   31    28
   6  |    9   10    7    7   10    4    8    8    8   10    3 |   922  556  925  923  555  923  919  922  923  924   922
   7E |   13   18    7   12   16    5    9   11   12   10    4 |    25   27   31   32   29   31   33   34   35   32    30
   8  |   10    9    6   10    8    6    6    7    7    7    2 |    26   29   27   26   27   24   27   26   26   24    26
   9  |    6   10    7    7    8    5    6    5    4    9    2 |    27   33   29   27   27   26   32   28   27   30    28
  10  |    7    7   10   13    8    5    9   11    5   10    3 |    28   35   26   29   24   27   35   27   28   28    28
  11E |    7    8    7    9   10    4    7    7    6    7    2 |    47   48   45   47   46   46   45   46   47   42    45
  12  |   10   16    7   17    9    8    8   13   12   13    4 |    40   41   39   43   39   40   42   41   38   37    39
  13  |    8   12   10   15   11    5   11   14   11   19    4 |    22   31   19   31   19   26   30   29   25   29    24
  14  |    9    8   10   14    9    6    8   12   11   17    4 |    19   23   21   25   19   22   23   24   23   24    20
  15  |    8   12   10   17    9    9   10   22   12   17    4 |    49   52   48   43   49   42   49   46   43   46    46
  16  |   14   21    6   18   14    9    9   15   12   20    5 |    29   29   28   34   24   30   29   31   32   30    28
  17  |    8   13    7   14   11    6   10   10   10   16    3 |    25   29   25   32   26   27   28   27   28   25    26
  18  |   15    8    9   10    9    6    8    6    7   12    3 |    82   77   76   76   76   77   77   77   79   79    77
  19  |    8   16    5   11   11    5    8   11   10   15    3 |    26   32   29   31   28   26   28   26   27   24    27
  20  |    8   10    9   13   11    6    8   13   11   16    4 |    22   24   19   24   21   21   22   23   24   24    21
  21  |    7   13    7   14   15    5    9   15   11   18    4 |    18   22   19   21   25   18   21   19   23   19    18
  22  |    7    7   11   10    6    6    6    9   10   13    3 |    29   30   25   31   25   27   29   27   24   31    27
  23  |   13   19    8   15   12   10    7   22   13   17    5 |    21   22   20   28   19   23   21   30   25   27    21
  24E |   11   12   12    6   13    4    8   10    6   12    3 |    22   26   28   21   25   22   25   25   21   20    23
  25  |    7   11    5    9    7    6    8    6    8   10    2 |    24   32   27   27   27   24   29   25   24   25    26
  26  |    8    9    5   11   10    5    8    8    5    9    3 |    24   28   24   26   24   22   24   24   23   22    23
  27  |   10    9    5   10   10    4    6    9    5    8    2 |    27   29   30   26   27   26   27   28   27   28    27
  28  |   10   12    6   13   11    7   11   12   12   18    4 |    23   29   24   26   23   22   26   23   23   20    22
  29  |    9   21    5   16   17    8   11   12   13   13    4 |    27   28   27   33   29   29   28   29   30   26    27
  30E |   13   15   14   15   16    5    8    8    9   10    4 |    19   22   25   24   24   21   25   24   24   23    21
  31E |   13    8    6   12   16    6    6   11   10   10    3 |    28   27   26   31   27   28   29   27   28   28    27
  32  |    8    7   10    8    6    4    7    8    7   14    3 |    28   31   26   30   27   28   29   25   26   31    27
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   12    8   12   11    6    8   11    9   13      |T   62   54   63   65   55   62   65   64   64   64    62
 WRMS |   10   12    8   11   12    6    8   11    8   13      |NE  68   59   70   72   60   68   71   70   70   70    68
 MEDI |    8   10    7   12   10    5    8   11   10   13      |MD  27   29   27   29   27   26   29   27   26   28    27

Table 3.2004.5   GPS week: 2004   Day: 5   MJD: 58277.000                            

        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   12    8   10   13    5    8    8   12   11    3 |   302  302  301  301  186  301  301  301  304  301   301
   2  |    6   11    5   17   14    7   10   10   15   16    4 |    18   18   14   21   20   15   18   16   16   14    15
   3  |    7    7   10    9    6    5    8    7   10   11    3 |    17   26   17   19   14   18   26   15   15   20    18
  X4  |    1  ---  ---  ---  ---   67  ---  ---  ---  ---    0 |    35  ---  ---  ---  ---   61  ---  ---  ---  ---    35
   5  |    5    8    8   12   10    6    9   11   11   19    3 |    21   24   18   17   22   16   23   19   18   29    20
   6  |    7    8    8   10   14    5    8    7    8   12    3 |   778  622  776  779  621  779  778  777  778  782   777
   7E |    7   12    7   13   11    6    8   11    9   10    3 |    42   46   46   49   46   46   45   47   46   49    45
   8  |    7   10    6   13    8    5    7    9    8   11    3 |    17   22   19   17   20   16   20   16   17   21    18
   9  |    7    8    8   10    7    7    6    6    7    9    2 |    15   24   22   21   19   19   25   20   21   20    20
  10  |    5    8   11   10    8    4    8   14   10   12    3 |    27   36   28   30   28   28   35   31   28   31    30
  11E |    6   13    7   12   12    5    8    7   10    7    3 |    42   45   40   42   44   42   44   43   45   41    42
  12  |    8   18    5   14   10    6    7   12   14   16    4 |    32   28   28   37   30   30   33   32   33   32    31
  13  |   10   10   10   14   10    6    9   14   13   16    4 |    25   33   25   34   23   29   30   29   30   34    27
  14  |    6    8    9   15    8    6    8   12   12   18    3 |    25   28   25   28   27   26   26   26   27   28    25
  15  |    8   10    9   17    9    9   10   21   14   17    4 |    35   37   36   31   38   30   39   37   28   33    34
  16  |   12   18    6   18   13    9    6   15   13   20    4 |    19   16   16   26   16   22   16   24   22   23    17
  17  |    6   11    6   14   10    7    9   12   11   11    3 |    21   22   17   25   20   21   21   25   24   19    20
  18  |    7    8   10   15    8    6    8    8   11   13    3 |    59   61   58   60   58   59   61   60   56   63    59
  19  |    8   13    6   15   10    7    7   16   11   13    3 |    21   21   20   28   21   21   21   21   22   17    19
  20  |    7   10   11   12   12    5    8   14   13   16    4 |    15   13   11   16   12   12   14   16   17   20    12
  21  |   11   15   38   18   14   10   10   18   14   19    7 |    18   25   51   25   21   18   19   22   18   19    20
  22  |    7    7    9   11    6    7    6   14   14   17    3 |    13   17   12   21   13   17   17   17   22   23    15
  23  |   10   20    7   17   11   10    6   23   14   18    5 |    22   22   22   27   21   22   22   29   22   26    21
  24E |   12   15   12    8   14    6    7   11    9   13    4 |    17   21   21   16   22   15   18   17   17   15    16
  25  |    8    9    6    9    8    4    7    8    8    7    2 |    17   22   16   19   18   15   20   15   16   16    16
  26  |    7    8    6    9   10    5    6    9    7    8    2 |    19   22   20   20   20   20   21   21   20   21    19
  27  |    8    8    5   12    9    5    7    9    8   10    3 |    18   22   20   21   21   18   20   18   17   22    19
  28  |    9   11    7   15   11    8    8   12   12   19    4 |    16   22   16   20   15   14   20   17   18   16    16
  29  |    6   20    5   13   14   10    9   14   15   13    4 |    19   19   17   19   21   19   18   26   20   16    17
  30E |    6    8   13   18   14    7    7    8   10   11    3 |    37   37   39   38   38   34   38   36   31   38    36
  31E |    9    7    6   12   14    6    5   11   10   13    3 |    34   37   33   34   32   33   34   34   34   34    33
  32  |    7    8   11   10    7    4    6    9   10   12    3 |    28   32   29   31   28   28   32   27   28   30    29
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   11   11   13   11    7    8   12   11   14      |T   57   55   58   60   49   57   59   59   58   59    56
 WRMS |    8   11    9   12   11    7    8   14   10   14      |NE  61   59   62   65   52   62   64   63   62   64    61
 MEDI |    7   10    8   13   10    6    8   11   11   13      |MD  21   24   22   26   21   21   23   25   22   23    20

Table 3.2004.6   GPS week: 2004   Day: 6   MJD: 58278.000                            

        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   13    3    7    8    8   10    3 |   221  214  218  219  159  218  217  219  218  221   219
   2  |   11   17    7   13   15    4   10   10   11   13    4 |    21   23   18   21   23   18   19   17   20   14    17
   3  |    8   13   11   10    6    3    9    8    9   10    3 |    21   32   19   23   18   21   29   18   21   19    21
  X4  |    2  ---  ---  ---  ---   15  ---  ---  ---  ---    0 |    38  ---  ---  ---  ---   43  ---  ---  ---  ---    38
   5  |    7   17    9   11    9    4    9   12   10   21    4 |    32   35   33   26   34   29   35   23   27   34    29
   6  |    9   15    9    9   11    3    7    7    8   11    3 |   886  642  885  886  638  887  885  888  888  893   887
  X7E |    5  ---    6   11   11    4   10   10   10    9    3 |    65  ---   65   68   63   67   63   67   68   66    65
   8  |    6   16    6    8    8    3    6    7    6    7    2 |    18   27   19   18   21   17   20   18   17   15    18
   9  |    7   15    8    8    7    4    7    5    8    7    2 |    27   42   31   29   29   28   34   30   31   29    30
  10  |    9   13   11    9    7    3    7   12    7    9    3 |    36   43   32   38   31   35   39   39   36   36    35
  11E |    7   19    7    9   12    3    8    7    7    7    3 |    52   52   46   51   51   48   49   51   47   52    49
  12  |   10   16    7   14   11    3    7   16   11   15    4 |    36   41   35   43   38   37   39   43   38   40    37
  13  |   11   17   11   13   10    4    9   12   11   17    4 |    32   34   32   40   28   35   34   36   34   40    32
  14  |    7   14   10   12   10    4    7   11   12   16    3 |    34   40   33   40   33   36   34   36   38   36    34
  15  |   11   14   10   16    9    5   10   20   12   20    4 |    50   59   51   38   52   44   54   47   45   47    48
  16  |   12   26    6   17   13    5    8   14   11   19    4 |    27   29   25   36   24   30   26   35   34   34    27
  17  |    9   15    6   14   10    3    9   11    9   10    3 |    21   26   18   25   21   21   20   27   24   19    20
  18  |   12   17    9   13    9    4    9    6    8   13    3 |    78   87   79   79   77   79   81   80   79   80    79
  19  |    8   18    6   11   11    3    7   15    9   13    3 |    21   26   21   23   20   20   20   24   20   18    19
  20  |    8   12   10   12   10    3    7   14   12   16    4 |    19   21   15   24   16   18   18   24   22   25    18
  21  |   10   15    6   17   16    4   10   13   10   15    4 |    23   28   28   30   26   23   24   25   27   22    23
  22  |    8   12   10   10    7    3    6   11    9   18    3 |    19   26   18   27   18   22   21   22   25   27    20
  23  |   11   24    8   14   12    7    7   22   11   16    4 |    25   28   22   31   21   26   24   31   30   31    24
  24E |    9   16   11    8   12    4    9   11    9   12    3 |    26   24   29   25   27   24   25   23   21   21    23
  25  |    7   15    6    7    6    4    7    7    6   12    2 |    18   26   20   22   20   18   23   18   20   25    19
  26  |   10   15    6   10    8    2    6    8    4    8    3 |    22   28   22   22   23   20   23   20   21   22    21
  27  |    6   14    5    7    9    2    7    9    5    8    2 |    18   25   20   20   21   18   20   20   18   21    19
  28  |   13   20    6   12   11    5    8   12   11   17    4 |    18   29   17   20   16   17   21   19   18   14    16
  29  |   10   30    6   15   14    5   11   14    9   11    4 |    27   27   22   29   23   23   20   27   24   24    22
  30E |    8   35   13   10   16    4    7    7    8   10    4 |    54   62   54   53   53   51   53   50   49   49    51
  31E |   11   17    6   11   11    3    5   11    8   11    3 |    50   56   54   52   53   53   53   52   55   51    52
  32  |    8   14   11    8    6    3    5    9    9   11    3 |    38   42   39   40   39   39   42   35   39   38    38
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18    8   12   11    4    8   12    9   13      |T   64   62   65   67   55   64   66   66   66   66    64
 WRMS |    9   16    8   10   10    4    8   11    8   14      |NE  67   64   68   71   56   67   70   70   69   70    67
 MEDI |    8   16    7   11   10    4    7   11    9   12      |MD  27   29   29   30   27   28   29   30   30   31    27



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 4.2004   GPS week: 2004   MJD: 58272.0-58278.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |U   11    11    29 |U    8    13    22 |U   11    11    27 |
emr | emr 2934 |U   18    18    39 |U   12    15    50 |    13    12    42 |
esa | esa 2976 |    11    10    28 |U    8    13    26 |    11    12    31 |
gfz | gfz 2975 |U   11    10    29 |U    8    13    27 |U   11    11    30 |
grg | grg 2948 |    13    16    28 |    10    15    27 |    12    14    40 |
igr | igr 2973 |    11    10    26 |     7    13    23 |    10    10    28 |
igs | igs 2976 |    10     9    26 |     8    12    25 |    11    10    28 |
jpl | jpl 2976 |U   14    14    39 |U   10    14    33 |U   12    14    37 |
mit | mit 2976 |    14    13    28 |U    9    16    34 |U   42    42   107 |



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 5.2004.0   GPS week: 2004   Day: 0   MJD: 58272.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |    10     7    26 |     7    11    26 |    10     9    32 |
emr | emr 2976 |    19    22    31 |    13    17    60 |    14    11    54 |
esa | esa 2976 |     9     8    22 |     8    11    28 |    10    10    34 |
gfz | gfz 2976 |    10     7    26 |     7    12    28 |    11    11    37 |
grg | grg 2975 |    12    10    28 |     9    15    30 |    11    11    43 |
igr | igr 2976 |     9     7    22 |     7    12    27 |    10    10    33 |
igs | igs 2976 |    10     8    21 |     8    11    30 |    10     8    33 |
jpl | jpl 2976 |    13    15    25 |     9     9    35 |    10     9    36 |
mit | mit 2976 |    16    14    23 |     7    16    39 |    47    95   462 |

Table 5.2004.1   GPS week: 2004   Day: 1   MJD: 58273.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    12    11    40 |     8    15    22 |    10    12    27 |
emr | emr 2880 |    20    19    38 |    13    17    53 |    13     9    38 |
esa | esa 2976 |    10     7    36 |     8    14    26 |    10    12    26 |
gfz | gfz 2975 |    12    11    39 |     8    16    28 |    11    11    28 |
grg | grg 2976 |    13    14    41 |    11    18    25 |    11    12    36 |
igr | igr 2957 |    13    10    39 |     8    14    24 |    10    10    27 |
igs | igs 2976 |    11     9    36 |     9    14    26 |    10    10    27 |
jpl | jpl 2976 |    12    12    38 |    14    19    42 |    11    13    31 |
mit | mit 2976 |    14    12    42 |    10    16    32 |    17    13    46 |

Table 5.2004.2   GPS week: 2004   Day: 2   MJD: 58274.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |    15    11    30 |     9    13    24 |    15    13    26 |
emr | emr 2880 |    19    23    40 |    11    16    47 |    16    14    46 |
esa | esa 2976 |    14    12    27 |     8    13    24 |    15    12    30 |
gfz | gfz 2976 |    16     9    29 |     8    13    26 |    15    12    30 |
grg | grg 2880 |    19    23    23 |    13    16    37 |    19    21    56 |
igr | igr 2976 |    15    11    28 |     9    13    23 |    14    11    26 |
igs | igs 2976 |    15    11    26 |     9    13    26 |    14    11    26 |
jpl | jpl 2976 |    23    23    78 |    10    16    35 |    18    20    51 |
mit | mit 2976 |    19    16    29 |     9    17    33 |   174   134   116 |

Table 5.2004.3   GPS week: 2004   Day: 3   MJD: 58275.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3070 |    13     9    32 |     8    13    23 |    10    14    33 |
emr | emr 2976 |    14    16    43 |    12    17    39 |    12    17    39 |
esa | esa 2976 |     9     6    26 |     8    12    27 |    10    14    38 |
gfz | gfz 2976 |    11     7    31 |     8    13    28 |    10    14    38 |
grg | grg 2880 |    16    16    31 |     9    14    26 |    11    11    34 |
igr | igr 2976 |    10     5    28 |     8    13    24 |    10    14    36 |
igs | igs 2976 |     9     6    27 |     9    13    25 |    10    13    36 |
jpl | jpl 2976 |    11    14    33 |    10    15    35 |    12    16    45 |
mit | mit 2976 |    13    11    30 |    10    17    32 |    15    17    34 |

Table 5.2004.4   GPS week: 2004   Day: 4   MJD: 58276.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |    12    13    30 |     7    11    17 |    11    11    29 |
emr | emr 2976 |    18    18    40 |     9    16    42 |    12    11    36 |
esa | esa 2976 |    12    12    33 |     8    12    21 |    10    11    33 |
gfz | gfz 2976 |    12    12    28 |     8    13    27 |    11    12    32 |
grg | grg 2976 |    12    17    30 |    10    14    22 |    13    11    35 |
igr | igr 2976 |    11    12    27 |     8    12    17 |    11    11    29 |
igs | igs 2976 |    12    12    28 |     8    11    20 |    11    10    30 |
jpl | jpl 2976 |    15    15    35 |     9    11    30 |    11     9    34 |
mit | mit 2976 |    16    17    28 |     9    16    29 |    14    10    29 |

Table 5.2004.5   GPS week: 2004   Day: 5   MJD: 58277.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9     9    25 |     7    10    21 |    11     8    21 |
emr | emr 2976 |    17    12    40 |    12    13    44 |    13    12    30 |
esa | esa 2976 |    10     9    26 |     8    11    25 |    17    17    27 |
gfz | gfz 2976 |     8     7    25 |     8    11    23 |    12     9    23 |
grg | grg 2976 |     9    13    25 |     8    13    21 |    12     9    25 |
igr | igr 2976 |     7     7    23 |     8    11    20 |    11     8    21 |
igs | igs 2976 |     9     7    25 |     7    11    22 |    11     9    23 |
jpl | jpl 2976 |    13    13    32 |     8    13    27 |    10    14    32 |
mit | mit 2976 |    10     8    27 |    10    14    39 |    15    13    34 |

Table 5.2004.6   GPS week: 2004   Day: 6   MJD: 58278.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9    17    22 |     7    15    22 |    10    12    23 |
emr | emr 2880 |    18    13    40 |    14    12    63 |    12    13    50 |
esa | esa 2976 |    11    13    22 |     7    17    30 |     9    11    26 |
gfz | gfz 2975 |     8    14    23 |     6    15    25 |    10    10    21 |
grg | grg 2976 |     9    20    20 |     7    16    25 |    10    21    48 |
igr | igr 2976 |     8    13    18 |     6    15    23 |     9     9    23 |
igs | igs 2976 |     8    13    20 |     6    15    24 |     9    10    22 |
jpl | jpl 2976 |    12    10    30 |     9    17    30 |     9    15    30 |
mit | mit 2976 |     8    13    19 |     7    14    32 |    14    12    27 |


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 6.2004   GPS week: 2004   MJD: 58272.500-58278.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -7     -12       0     -88      3 |       6     20
            |      21      17      94      81      3 |       4
emr   uuuxu |      34      11      71     144      6 |      28     36
            |      43      39     165     255      6 |       4
esa   uuuuu |      10       8     -65      79      1 |       7     21
            |       4      16      79      35      8 |       6
gfz   uuuuu |      12       8      36      47     -3 |      16     24
            |      27      19      94     167      4 |       5
grg   uuuuu |      -5     -16      55    -135      4 |       1     18
            |      15      16      37      37      2 |       2
igr   xxxxx |      -1       5      81      -3      3 |     -11     22
            |      11      10      50      26      3 |       4
irf   xxxxx |      -3     -13     -27     -12      5 |      -6     20
            |      10      11       4      16      2 |       2
jpl   uuuuu |      -5     -13      90     125    -10 |      22     28
            |      18      18      47      23      8 |       6
mit   uuuuu |     -34       1     -79    -169     -4 |      20     28
            |      17       6      39      59      5 |       5
ngs   uuuxu |     -14       3     -20      10     -4 |      14     25
            |      21      29     131     220      6 |       4
sio   uuuux |      18      36    -111      67      9 |      60     63
            |      13      15      65      76      7 |       1


Table 7.2004.0   GPS week: 2004   Day: 0   MJD: 58272.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      20     -32      67     -11     -1 |      11     24
emr   uuuxu |      53      20    -116     286      6 |      32     40
esa   uuuuu |      10      16     -33       7    -10 |      15     26
gfz   uuuuu |      38       4     -15     163     -4 |      21     27
grg   uuuuu |     -29     -16      -2    -189      5 |       2     20
igr   xxxxx |      -4      -2      31     -15     -4 |      -5     22
irf   xxxxx |     -21     -14     -27     -35      3 |      -5     21
jpl   uuuuu |     -25       9      61     124      1 |      27     32
mit   uuuuu |     -32       6     -35    -186     -4 |      25     33
ngs   uuuxu |     -19     -37     114    -152      6 |      17     28
sio   uuuux |       5      44    -143      18     13 |      60     62

Table 7.2004.1   GPS week: 2004   Day: 1   MJD: 58273.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       0       4     -18    -131      2 |       9     23
emr   uuuxu |      69      21      -9     277      6 |      32     40
esa   uuuuu |      18      34    -218      92     -6 |      12     26
gfz   uuuuu |      23      41     -93     130     -2 |      20     27
grg   uuuuu |      -5     -19      85    -117      6 |       2     20
igr   xxxxx |      16     -10     121     -31      5 |      -7     23
irf   xxxxx |       5       6     -21     -18      7 |      -5     21
jpl   uuuuu |     -15     -47     173     143    -15 |      28     32
mit   uuuuu |     -38      -2     -68    -197      3 |      24     32
ngs   uuuxu |     -37     -31     137    -210      2 |      18     28
sio   uuuux |      16      37     -88      51     21 |      61     63

Table 7.2004.2   GPS week: 2004   Day: 2   MJD: 58274.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -3      -3       0     -38      3 |      10     24
emr   uuuxu |      43       6      15     227     -1 |      33     41
esa   uuuuu |       6      18     -92     107     -3 |      12     26
gfz   uuuuu |      13      -1     159     198     -4 |      20     27
grg   uuuuu |      -8     -35     117    -172      6 |       4     19
igr   xxxxx |       0       5     114     -11      3 |      -6     22
irf   xxxxx |     -10     -12     -29     -22      5 |      -3     20
jpl   uuuuu |      24      -6      64      84     -6 |      28     32
mit   uuuuu |     -50       7    -126    -226     -2 |      25     33
ngs   uuuxu |     -37      -9     -14    -158     -3 |      20     28
sio   uuuux |       5      40    -162     -76     11 |      63     66

Table 7.2004.3   GPS week: 2004   Day: 3   MJD: 58275.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -43     -28     122    -195      7 |       5     18
emr   uuuxu |      38     -20       6     222     10 |      27     34
esa   uuuuu |      11       6     -91      76      2 |       5     20
gfz   uuuuu |      44      14      57     190      3 |      15     23
grg   uuuuu |      21     -10      42     -86      0 |       0     17
igr   xxxxx |      -3      20       4      17      5 |     -12     22
irf   xxxxx |       2      -9     -30       9      8 |      -8     19
jpl   uuuuu |      -4      -6      92     116    -16 |      22     28
mit   uuuuu |     -60      -3     -33    -230     -3 |      19     26
ngs   uuuxu |     -12      19    -240    -121     -8 |      15     24
sio   uuuux |      16      35      14     100      9 |      59     61

Table 7.2004.4   GPS week: 2004   Day: 4   MJD: 58276.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -24     -26      -3    -188      7 |       4     17
emr   uuuxu |      69     -31      83     203     -2 |      27     34
esa   uuuuu |      11      -5      16     102      5 |       4     17
gfz   uuuuu |      13     -18     132       9     -5 |      14     21
grg   uuuuu |      -6     -11      45    -131      4 |       0     16
igr   xxxxx |      -8      10      60      36      5 |     -13     21
irf   xxxxx |       9     -15     -25       2      6 |      -7     20
jpl   uuuuu |     -24      -2      67     140    -15 |      20     25
mit   uuuuu |     -15       6    -130    -133     -1 |      18     24
ngs   uuuxu |     -10      31    -102     148     -8 |      13     21
sio   uuuux |      19      57     -90     143      3 |      60     63

Table 7.2004.5   GPS week: 2004   Day: 5   MJD: 58277.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -12      -7      13     -27      2 |       3     18
emr   uuuxu |      20      -9     114     224     16 |      23     32
esa   uuuuu |      10     -12     -32      71      6 |       1     17
gfz   uuuuu |     -30      -2     -56    -170    -10 |      11     21
grg   uuuuu |     -13      11      56    -105      3 |      -2     18
igr   xxxxx |     -17      -2     134     -31      2 |     -15     23
irf   xxxxx |      -2     -15     -34       1      3 |      -8     21
jpl   uuuuu |      -1     -15      39     153      0 |      15     24
mit   uuuuu |     -33      -9     -67    -143    -10 |      16     24
ngs   uuuxu |      23      38      34     248     -6 |       9     22
sio   uuuux |      45      28    -181     115      9 |      59     62

Table 7.2004.6   GPS week: 2004   Day: 6   MJD: 58278.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      12       9    -183     -28      1 |       3     17
emr   uuuxu |     -55      88     406    -429      6 |      25     32
esa   uuuuu |       5      -3      -3     100     12 |       1     17
gfz   uuuuu |     -19      17      65    -187      0 |      10     22
grg   uuuuu |       2     -34      44    -146      1 |      -1     17
igr   xxxxx |       9      13     101      12      5 |     -15     23
irf   xxxxx |      -7     -30     -26     -22      2 |      -7     19
jpl   uuuuu |       9     -26     134     114    -15 |      13     23
mit   uuuuu |     -11       4     -91     -66    -10 |      15     25
ngs   uuuxu |      -3       7     -69     319     -6 |       9     22
sio   uuuux |      19       8    -127     120     -1 |      61     63


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