[IGSREPORT-23008] Wk 1807 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri Sep 12 22:08:07 PDT 2014


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1807   (Aug 24, 2014 - Aug 30, 2014)

Contacts: igs.acc 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 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:

igs1807[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1807[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1807[0-6].cls  IGS GPS clock combination summary report.
igs18077.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs18077.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   | 4 4
                0  |  EMR   | 8
                0  |  ESA   | 4 4
                0  |  GFZ   | 1 2 6 21 30 1 6 8 21 30 DAEJ DAEJ
                0  |  GRG   | 6 6 FAA1 KELY BOGT FAA1
                0  |  JPL   | 8
                0  |  MIT   | CRO1 FLIN MDVJ MONP
                1  |  COD   | KARR KOUC KARR KOUC
                1  |  EMR   | 4 4
                1  |  GFZ   | 1 2 6 30 1 6 30
                1  |  GRG   | 4 6 4 6 CAS1 GLSV GRAZ IRKJ KARR USNO CAS1 GLSV GRAZ
                1  |  GRG   | IRKJ KARR NKLG USNO
                1  |  JPL   | 4 8
                1  |  MIT   | 9 4 9
                2  |  COD   | 4
                2  |  EMR   | 8
                2  |  ESA   | 4 SFER SFER
                2  |  GFZ   | 1 2 6 30 1 6 30 BOR1 KELY NKLG KELY NKLG
                2  |  GRG   | 6 6 DRAG KOUC MONP DRAG KOUC UNSA
                2  |  JPL   | 8 BOGT
                2  |  MIT   | 9 4 9 11 USNO MDVJ MONP USNO
                3  |  COD   | 4 FLIN REUN
                3  |  EMR   | 8 11 20 HOB2 HOB2
                3  |  ESA   | 4 HOB2 HOB2 SFER UNSA
                3  |  GFZ   | 1 6 30 1 6 30 MCM4
                3  |  GRG   | 6 6 BOR1 HYDE MAC1 SFER BOR1 FLIN HYDE MAC1 SFER
                3  |  JPL   | 8 TIXI
                3  |  MIT   | SFER MDVJ SFER
                4  |  COD   | 4 KARR TRO1
                4  |  ESA   | 4 SFER FAA1 HOFN SFER
                4  |  GFZ   | 1 2 4 6 30 1 4 6 30 FAIR FLIN IRKJ NYA1 SFER TRO1
                4  |  GFZ   | WHIT FAIR NYA1 WHIT
                4  |  GRG   | 6 6 CAS1 FAA1 MAR6 NYA1 CAS1 CHUM FAA1 IRKJ MAL2
                4  |  GRG   | MAR6 NYA1 SFER TRO1
                4  |  JPL   | 8 RESO
                4  |  MIT   | HNLC MONP
                5  |  COD   | 4 HOB2 HOB2
                5  |  EMR   | 8 WHIT WHIT
                5  |  ESA   | 4 FLIN HOB2 HOB2 UNSA
                5  |  GFZ   | 1 2 4 6 30 1 4 6 30 CHUR FAIR GLSV INVK YELL CHUR
                5  |  GFZ   | FAIR FLIN GLSV YELL
                5  |  GRG   | 6 6 KOUC KOUC
                5  |  JPL   | WHIT
                5  |  MIT   | 11
                6  |  COD   | 9 MAL2
                6  |  EMR   | 4 WHIT
                6  |  ESA   | UNSA
                6  |  GFZ   | 1 2 6 30 1 6 30 MAL2 QAQ1 QAQ1
                6  |  GRG   | 6 4 6 PDEL SFER PDEL SFER
                6  |  JPL   | 4 WHIT
                6  |  MIT   | 9 4 9 BRMU FLIN HNPT MONP

 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
               ----+--------+---------------
                0  |  GRG   |   6
                3  |  GFZ   |   9

 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 G04 |  4 |  4 |  4 |  4 |    |  4 |  4 |
           PRN G08 |    |    |    |  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.

 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 |    -.4    1.6     .1     -10     11     -9     .26
       EMR  |   0 |    3.6    3.7   10.1     -21      8    -14     .37
       ESA  |   0 |    -.6     .1   -1.8      -5     -5     15    -.20
       GFZ  |   0 |     .2     .6   -1.5     -21    -39    -14    -.09
       GRG  |   0 |   10.6    1.3     .4     -36      8      4     .65
       JPL  |   0 |    6.3    1.2   16.6    -108     36    -20    -.72
       MIT  |   0 |    3.5    -.4    2.3       0     10    -41     .34
       NGS  |   0 |    -.8    2.8   19.9     -34    -43      8     .48
       SIO  |   0 |    1.1    1.6  -14.4      -4     14    -17     .24

       COD  |   1 |   -1.0    -.5    -.9     -53     33    -55     .43
       EMR  |   1 |   -2.3    5.8    1.2     -20     13    -30     .57
       ESA  |   1 |     .6     .5   -1.9       5    -15     48     .06
       GFZ  |   1 |     .3    -.1   -1.9     -17    -37     15    -.01
       GRG  |   1 |    9.8   -5.1   -6.2     -19     26     20     .79
       JPL  |   1 |   -2.3    6.1    4.8     -58     38    -14     .01
       MIT  |   1 |     .0    1.2    3.7      -1      4    -39     .43
       NGS  |   1 |   -3.3   -9.8   11.5     -56      0    -46     .53
       SIO  |   1 |    2.7    5.1   -9.1      -1      0      9     .12

       COD  |   2 |    -.4     .1     .6     -65     37    -37     .30
       EMR  |   2 |   -2.4    7.2    2.5     -24      8    -19     .40
       ESA  |   2 |     .0     .9   -1.9       9    -14     50    -.04
       GFZ  |   2 |     .9     .6   -1.7     -23    -53     14    -.03
       GRG  |   2 |    7.2   -6.1    5.3     -21     37     -5    1.05
       JPL  |   2 |    1.6    7.8   11.4     -31     12     35    -.17
       MIT  |   2 |    3.5     .0    5.1       6      8    -35     .47
       NGS  |   2 |    3.6   -2.2   18.2     -61    -40     20     .60
       SIO  |   2 |    3.3    3.6  -15.6      -9     20     -3     .34

       COD  |   3 |    -.1     .0     .1     -41      3     -2     .17
       EMR  |   3 |   -5.0    2.8    8.7     -19      4      1     .21
       ESA  |   3 |    -.2     .8   -1.5       9    -15     27    -.09
       GFZ  |   3 |     .7     .3   -1.5     -51    -62      4    -.02
       GRG  |   3 |    9.9   -3.6    1.7     -26     31    -27     .40
       JPL  |   3 |   -3.5    6.9    8.3     -26      0    -30     .38
       MIT  |   3 |   -4.7    1.4     .3       4      7    -37     .46
       NGS  |   3 |    -.2   -2.9   13.6     -39    -17    -14     .36
       SIO  |   3 |   -2.0    7.7   -6.1       5      1      7     .29

       COD  |   4 |     .1    -.1     .0     -34     -6      8     .26
       EMR  |   4 |    2.8    2.6    5.7     -25     11    -17     .28
       ESA  |   4 |     .1     .9   -1.8       9    -12     24    -.10
       GFZ  |   4 |     .7     .3   -1.6     -30    -46      9     .06
       GRG  |   4 |   17.8    -.6   -3.3     -25     31     13     .78
       JPL  |   4 |   -2.5    3.3    5.8     -85     49      0    -.27
       MIT  |   4 |   -1.2    4.4     .9      -6     10    -43     .40
       NGS  |   4 |   -2.5   -5.8   15.9     -44    -18    -21     .60
       SIO  |   4 |    3.7    3.8   -5.9       3      8    -22     .31

       COD  |   5 |   -1.0     .1    -.3     -20     24     -2     .07
       EMR  |   5 |   -1.9    5.0    5.9     -16      7     -7     .07
       ESA  |   5 |    -.2     .5   -1.9      -9      5     31    -.14
       GFZ  |   5 |     .0     .0   -1.3     -36    -37     24    -.20
       GRG  |   5 |   19.0     .0    1.5      -8     18    -22     .63
       JPL  |   5 |    5.2    5.1   13.9     -93     35     18    -.35
       MIT  |   5 |    1.6    5.0     .7      -4      8    -35     .32
       NGS  |   5 |    2.6   -2.8   14.3     -36    -30      3     .38
       SIO  |   5 |    3.2    3.9   -6.2     -10     15     -4     .11

       COD  |   6 |    -.1    -.4     .3     -32      6     18     .18
       EMR  |   6 |     .0    6.8   10.4     -25     27    -37     .04
       ESA  |   6 |    -.2    1.3   -1.8       1     -1     39    -.12
       GFZ  |   6 |    -.1     .6   -1.5     -14    -33     15    -.25
       GRG  |   6 |   12.0   -2.3    2.5     -18     36    -38     .42
       JPL  |   6 |    5.7   10.8   15.7    -102     19    -19    -.32
       MIT  |   6 |    4.9    4.4    1.5      -4      9    -30     .33
       NGS  |   6 |    5.9   -9.5   19.1     -71    -44      2     .27
       SIO  |   6 |    1.9    6.5  -11.7      -8     27    -11     .16


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.


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 1.1807.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1807.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 2.1807.[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 3.1807.[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 5.1807.0-6). 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 1807 summary.                       (Aug 24, 2014 - Aug 30, 2014)

Table 1.1807.a   GPS week: 1807   MJD: 56893.000-56899.000

         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  250|    0     0     0    27    15    -2   .08   10   10 |   -1109     -53     17    111
        |    1     0     1    11     7    22   .02           |     190     591
emr   80|   -2     0     0    19   -31    45   .30   13   13 |    2095      68     15    142
        |    1     1     0    10    15    17   .03           |     628     640
esa  149|    0     0    -5     0    -1     6  -.31   12   12 |    -254   -1209     10    173
        |    0     0     0    13     8     9   .02           |    2018    4614
gfz  194|    0     0     4     4   -27     0   .15   14   13 |    -288     163     15    147
        |    0     0     1    25    14    18   .03           |     510     701
grg  175|    3     0    -2    14    23    -1   .28   21   18 |    -182     -40     17    148
        |    1     0     2    18    25     9   .02           |      60     121
igr  n/a|    0     0     0     1     2   -14  -.19    6    6 |    5993    -202     17    115
        |    0     0     0    17    10    13   .02           |     784     686
jpl   80|    0     0    -1   -24    32   -11   .03   13   12 |    1289     198     17    133
        |    1     1     0    21    17    21   .03           |     777     710
mit  350|    1    -4     0   -11   -28     2   .07   16   14 |    -107    -103     24    199
        |    0     1     0     8    21    15   .01           |     171     194
ngs  228|    0     1     2   -26    31   -43   .03   12   11 |   -1095     -10   1235   2762
        |    0     0     0    35    21    25   .07           |     190     670
sio  630|    0     0    -1   -10   -19     6  -.60   15   15 |     ---     ---    ---    ---
        |    1     0     1    19    29    11   .04           |     ---     ---


Table 1.1807.b   GPS week : 1807   MJD: 56893.000-56899.000   

         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  |    5    6    4    4    5    4    5 |
   2  |    4    4    4    5    4    4    4 |
   4  |    6    7    8    7    7    6    6 |
   5  |    5    4    5    5    4    5    5 |
   6  |    5    6    6    6    6    6    6 |
   7  |    5    5    5    5    5    4    4 |
   8  |    6    6    6    6    6    6    5 |
   9  |   10    8    7    0    0    0    7 |
  10  |    4    4    4    5    4    4    4 |
  11  |    4    4    4    4    4    4    4 |
  12  |    5    5    5    5    5    5    5 |
  13  |    5    5    5    5    5    4    4 |
  14  |    5    5    5    5    5    5    4 |
  15  |    5    5    5    5    5    5    5 |
  16  |    6    5    5    6    5    5    5 |
  17  |    6    5    5    5    5    5    5 |
  18  |    5    5    5    5    5    5    5 |
  19  |    5    5    5    5    5    5    5 |
  20  |    5    5    5    5    5    5    5 |
  21  |    4    5    4    4    4    5    4 |
  22  |    5    5    5    5    5    5    5 |
  23  |    5    5    4    5    4    4    4 |
  24  |    4    4    4    4    4    4    4 |
  25  |    4    4    4    4    4    4    4 |
  26  |    4    4    4    3    4    4    4 |
  27  |    5    5    5    5    5    5    5 |
  28  |    5    5    5    5    5    5    4 |
  29  |    5    5    5    5    5    5    5 |
  30  |    5    4    4    4    4    4    4 |
  31  |    6    6    6    5    5    5    5 |
  32  |    5    4    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
         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 2.1807.0   GPS week: 1807   Day: 0   MJD: 56893.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  248|   -2    -1     0    45    25    14   .05   14   14 |   -1387     409     22    118
emr   80|    0     1     0    21   -11    51   .23   13   13 |    2629   -1034     14    148
esa  150|    0     1    -5    -1    10     2  -.32   13   13 |    -788     279     11    164
gfz  198|    0     0     4    15    -7    -9   .11   15   13 |    -216     184     14    141
grg  177|    2     0     0    23    -4     8   .29   23   17 |    -172      73     16    148
igr  n/a|   -1     0    -1     3    14     7  -.21    6    5 |    7627   -1388     16    101
jpl   80|   -1     1    -1   -51    30   -10   .05   13   12 |    1514   -1055     17    133
mit  350|    1    -5    -1    -8   -40     0   .04   15   13 |      85    -144     25    218
ngs  233|    0     1     3   -27     5   -48   .08   11   10 |   -1368     386   1264   2923
sio  655|    0    -1    -3   -11   -28    11  -.65   15   14 |     ---     ---    ---    ---

Table 2.1807.1   GPS week: 1807   Day: 1   MJD: 56894.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  255|    0     1     0    20     9   -30   .04    9    9 |   -1268     324     20    131
emr   80|    0     0     0    30   -35    56   .31   13   13 |    1618    -408     18    149
esa  150|    0     1    -4    -1     2    20  -.29   12   12 |    -246    -239     12    178
gfz  197|    0     0     5     3   -47    -1   .13   14   13 |     -60     172     17    138
grg  176|    1     0    -1     7    -4    -8   .30   22   19 |    -155     -16     18    145
igr  n/a|    0     0     0   -21     1     0  -.19    6    5 |    6161    -663     18     98
jpl   80|    0     0     0   -15    59    12   .04   13   12 |    1676    -317     18    134
mit  350|    0    -5     0   -17   -33    -4   .08   18   15 |      83    -308     27    205
ngs  232|    0     2     1   -41    65   -38   .10   12   11 |   -1151     441   1192   3021
sio  659|    0    -1     0   -11   -42     0  -.65   15   15 |     ---     ---    ---    ---

Table 2.1807.2   GPS week: 1807   Day: 2   MJD: 56895.000                            

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  253|    0     0     3    11    24   -34   .09   10    9 |   -1095     102     16    103
emr   80|   -1     0    -1    12   -34    55   .28   13   13 |    1349     295     14    133
esa  149|   -1     0    -7    14    -5    21  -.31   13   13 |    -877    -196     11    174
gfz  197|    0     0     5    24   -25   -11   .17   14   13 |    -525      71     14    146
grg  177|    3     0    -1    52    24     6   .26   21   19 |    -152     -70     18    188
igr  n/a|    0     0     0    -9    10   -27  -.21    6    6 |    5507    -106     16    109
jpl   80|   -1     0    -2    -6    27    22   .00   13   12 |     219     325     17    141
mit  350|    2    -5     0   -13   -14    -9   .07   15   13 |     -17    -151     24    200
ngs  230|    0     1     2   -23    13   -59   .05   12   10 |   -1122     179   1126   2904
sio  656|    2     0    -1   -43   -17    28  -.62   15   16 |     ---     ---    ---    ---

Table 2.1807.3   GPS week: 1807   Day: 3   MJD: 56896.000                            

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  250|   -1     0     0    34    10     4   .11   10   10 |    -931     -14     16    111
emr   80|   -2     1     0    19   -20    58   .32   14   14 |    1669     767     19    153
esa  150|   -1     0    -6    18   -10    -1  -.29   12   12 |    -211    -931     10    164
gfz  182|    0    -1     3    40   -37   -18   .19   14   13 |    -123       0     16    146
grg  173|    4     0     0     1    51    -9   .27   21   19 |    -296      92     17    148
igr  n/a|    0     0     1    32     9   -29  -.20    6    6 |    5466     520     18    130
jpl   80|    0     1     0     1     3   -32   .02   14   13 |     612     840     19    138
mit  350|    1    -4     0   -18    -9   -13   .07   14   13 |    -290     114     21    192
ngs  233|    1     1     2   -73    53   -14  -.03   11   11 |    -910     -48   1299   2714
sio  652|    0     0    -1   -25   -35     6  -.55   15   15 |     ---     ---    ---    ---

Table 2.1807.4   GPS week: 1807   Day: 4   MJD: 56897.000                            

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  246|    0     0     0    20    12    27   .08    9    9 |   -1228     366     19    117
emr   80|   -3     1     0     6   -46    46   .30   14   14 |    1789     758     16    150
esa  150|   -1     1    -4     2    -9     0  -.34   13   13 |   -1166     551     12    212
gfz  192|    0     0     3    -1   -37    11   .16   13   13 |   -1012    1082     12    150
grg  175|    2    -2    -4     1    60    10   .26   21   19 |    -209    -257     17    137
igr  n/a|    1     0     1     0     6   -14  -.19    6    6 |    5316     620     18    126
jpl   80|    0     0     0   -47    41   -28  -.02   13   13 |     736    1024     17    135
mit  350|    1    -3     0    -4   -12     6   .05   15   14 |     -83    -316     23    183
ngs  226|    0     0     2     0    27   -74   .06   12   10 |   -1202     339   1414   2481
sio  636|    1     0     0     4   -27     6  -.57   14   16 |     ---     ---    ---    ---

Table 2.1807.5   GPS week: 1807   Day: 5   MJD: 56898.000                            

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  250|    0     0     0    30     8     3   .09    9    9 |    -888   -1272     17     98
emr   80|   -3     0     0    35   -53    45   .31   13   13 |    2721      99     12    144
esa  150|    0     0    -5   -10    -5     2  -.32   12   12 |    3987  -11219     10    182
gfz  196|    0     0     4   -37   -30    38   .15   14   13 |     581   -1140     16    163
grg  177|    3    -1    -3    12    11   -10   .26   21   18 |    -191    -119     17    142
igr  n/a|    0     0     1    14   -10   -18  -.19    6    5 |    6027    -152     16    130
jpl   80|   -1     2    -1    -8    38   -23   .04   13   12 |    1918     466     17    126
mit  350|    2    -3     0     1   -17     2   .07   16   14 |    -193    -112     28    201
ngs  226|    1     2     3   -55    25   -64   .05   12   11 |    -789   -1480   1136   2435
sio  634|    0     0    -1    14    44     1  -.58   14   14 |     ---     ---    ---    ---

Table 2.1807.6   GPS week: 1807   Day: 6   MJD: 56899.000                            

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  251|    1     0     1    28    14    -4   .09    9    8 |    -968    -287     14    100
emr   80|   -3     3     0     8   -16     6   .34   14   14 |    2892       1     15    121
esa  150|    0     0    -4   -20     7     0  -.31   12   12 |   -2479    3286      9    140
gfz  196|   -1     0     4   -13    -9    -2   .16   13   12 |    -664     773     16    150
grg  174|    4     0    -7     1    24    -8   .30   20   18 |    -101      16     17    134
igr  n/a|    0     0     0    -7   -12   -20  -.16    6    5 |    5853    -245     17    111
jpl   80|   -2    -1    -2   -41    22   -21   .07   13   12 |    2350     107     16    127
mit  350|    3    -3    -1   -21   -70    32   .07   16   14 |    -340     194     26    197
ngs  222|    0     0     3    32    32    -5  -.09   12   11 |   -1124     113   1220   2859
sio  524|   -1     0    -1    -1   -29    -7  -.60   14   15 |     ---     ---    ---    ---

       
       
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 3.1807.0   GPS week: 1807   Day: 0   MJD: 56893.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   13    9   14   18   12    5   11   17   15    9    4 |    29   29   31   29   24   30   31   35   32   32    29
   2E |    7   12    9   13   19    7   11   12    7   11    4 |    22   22   17   24   21   16   20   26   21   17    18
   4E |   17   17   11   15   15    8   15   31   14   16    6 |   211  211  210  209  206  208  210  208  208  209   208
   5  |   18   13   16   19   16    5   13   15   10   11    5 |    27   36   32   25   30   22   31   21   28   24    26
   6E |   12   12   16   13   86    6   12   12   13   14    5 |    33   28   33   29   47   28   29   28   33   28    29
   7  |   18   18    9   11   19    5   17   11    8   13    5 |    30   33   22   32   37   23   28   26   26   20    24
   8E |   17   15   14   12   15    7   15   21   18   20    6 |   106  105  105  103  106  104  107  109  106  110   105
  X9  |   28   14   14  ---  ---   12  ---   12   26  ---   10 |    40   24   25  ---  ---   33  ---   20   23  ---    31
  10  |    8    8   13    9   15    2    7   11    7   12    3 |    20   23   20   24   25   18   21   21   24   16    20
  11  |    8    8   11    8   21    4    9   16   11    7    4 |    19   21   15   20   34   15   18   21   22   17    18
  12  |   10   12   12   14   21    7   13   18    9   16    5 |    20   24   15   23   31   15   19   25   21   13    17
  13  |   15   13   14   13   14    4   10   11   10   14    4 |    33   33   23   34   37   25   31   23   28   23    27
  14  |   13   11   14   18   16    5   12   12    9   18    4 |    28   28   22   30   29   22   26   32   28   26    25
  15  |   14   12   16   15   15    5   14   17   12   20    5 |    26   29   22   35   30   20   26   29   28   26    25
  16  |   23   16   13   18   17    5   17   22   13   17    6 |    24   22   14   24   23   11   20   20   17   14    13
  17  |   18   11   14   20   17    7   11   13   10   27    5 |    30   28   21   36   34   23   25   27   24   23    22
  18  |   12   12   15   19   15    6   14   18   11   12    5 |    22   27   17   32   28   20   25   30   23   17    21
  19  |   15   15   14   12   16    4   13   13    9   19    5 |    19   24   15   19   28   14   20   19   17   19    15
  20  |   12   15   12   16   19    6   13   12   10   16    5 |    32   29   30   39   35   31   30   33   31   31    30
  21E |   10   10   10   13   16    4   11   14   15    9    4 |    22   23   18   23   24   18   20   27   22   17    19
  22  |   13   17   15   20   13    5   16   16   12   11    5 |    28   35   24   42   38   28   32   39   36   25    31
  23  |   17   11   14   12   15    4   10   12   11   15    4 |    27   24   19   24   24   15   20   19   20   13    18
  24  |    9   10   14   10   13    5   10   11   10   10    3 |    23   21   24   23   26   17   22   19   20   14    20
  25  |    9   11   15   10   13    5   14   13   12   11    4 |    17   25   21   17   24   14   25   22   22   15    18
  26  |    9    7   11   12   14    6    7   17    9   12    4 |    24   26   21   33   29   22   22   27   23   22    23
 X27  |   13   12   13    9  ---    4   11   17   10   10    4 |    23   23   22   23  ---   17   28   19   22   16    20
  28  |   14   10   13   16   17    6   12   12    9   16    4 |    24   24   19   32   33   20   24   24   19   17    20
  29  |   10   14   14   18   19    7   16   10   13   18    5 |    26   33   29   26   28   23   32   28   30   26    25
 X30E |   21   10   13   13  ---    5   10   13   10    7    5 |    67   64   66   67  ---   62   66   62   65   62    64
  31  |   20   14   10   14   21   10   22   15   12   15    5 |    22   27   16   24   30   23   26   25   27   17    20
  32  |   13   12   10   14   15    5   12   12   10   14    4 |    19   22   19   20   20   16   22   20   18   18    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   14   13   13   15   23    6   13   15   11   15      |T   35   36   31   37   38   30   35   34   34   30    32
 WRMS |   14   13   13   13   17    5   12   13   10   14      |NE  25   27   21   27   29   20   25   24   24   19    21
 MEDI |   13   12   14   13   16    5   12   13   10   14      |MD  26   27   22   26   29   22   25   26   24   19    22

Table 3.1807.1   GPS week: 1807   Day: 1   MJD: 56894.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    9   12   13   17   36    6   12   37   13   11    6 |    74   71   73   74   64   72   73   68   75   73    71
   2E |    8   12    7   11   23    6   12   15   13   12    4 |    23   25   19   22   24   17   18   27   23   19    20
   4E |   12   23   10   15   19    8   14   34   16   19    6 |   226  226  226  226  228  228  226  233  230  227   227
   5  |    8   13   15   11   19    6   10   17   11   10    4 |    20   31   22   20   26   17   24   19   24   14    20
   6E |    9   11   14   13   47    8   10   14   13   12    5 |    24   24   27   22   24   20   22   23   24   20    21
   7  |    8   15    7    9   19    5   20   13   11   13    4 |    23   28   16   24   31   17   24   21   24   13    19
   8E |   10   16   11   13   20    7   19   22   19   16    5 |    95   96   96   93   96   95   97   96   96  100    95
  X9  |   18   13   17   20  ---   12  ---    9   14  ---    7 |    34   27   28   25  ---   34  ---   23   25  ---    31
  10  |    4    8   11   10   18    6    7   12   10   13    3 |    21   23   19   20   21   17   21   21   19   19    18
  11M |    8   10   12    7   23    5   10   13    8   11    4 |    23   22   16   19   31   18   20   20   24   18    18
  12  |    9   10   10   16   20    6   13   19   16   12    4 |    20   27   15   20   26   13   21   22   21   16    16
  13  |   10   11   13   13   21    5   11   11   10   16    4 |    19   29   20   22   30   18   26   16   24   18    19
  14  |    9   11   12   16   13    5   11   15   13   19    4 |    22   28   24   24   21   22   27   26   27   20    22
  15  |   11   11   15   14   13    3   12   18   11   17    4 |    18   27   18   27   20   15   22   20   25   19    18
  16  |   11   17   12   19   20    4   15   20   11   15    5 |    19   23   16   23   22   13   19   20   16   15    14
  17  |   10   11   14   17   20    7   13   15   12   24    5 |    22   28   16   27   29   16   23   25   21   20    17
  18  |    8   16   13   17   15    6   15   19   11   14    5 |    17   26   20   24   22   17   24   22   24   15    17
  19  |   10   15   12   18   22    6   16   13   11   18    5 |    19   27   17   20   26   14   22   16   18   17    14
  20M |   10   17   12   13   20    6   13   27    9   13    5 |    45   39   44   42   42   41   43   44   46   48    42
  21E |    7   11    8   14   31    6   10   12   13   10    4 |    23   26   21   27   31   20   22   20   26   22    20
  22  |    9   19   12   20   16    6   15   16   12   10    5 |    23   31   22   34   30   25   29   30   32   20    24
  23  |   10   10   14   13   20    5   11   11   10   17    4 |    18   23   17   18   19   13   19   16   20   11    15
  24  |    9   12   14   11   14    5   12   15   13   10    4 |    23   23   24   21   24   17   23   19   21   16    19
  25  |   10   12   11    9   12    5   12   17   14   11    4 |    18   27   22   19   24   16   25   20   20   19    18
  26  |    7   10   10    9   17    4    7   15   10   12    3 |    16   22   13   22   21   14   18   18   22   16    15
 X27  |   10   13   10   11  ---    6   14   19   10   14    4 |    19   21   18   21  ---   15   25   19   20   16    18
  28  |    7   10   14   13   18    6   13   15   11   14    4 |    16   23   14   25   28   13   19   19   15   13    15
  29  |    8   12   11   17   19    5   12    9   14   17    4 |    23   29   21   23   23   18   25   21   23   21    20
 X30E |    7    9   13    7  ---    4   12   14    8    6    3 |    40   41   43   39  ---   38   38   33   41   36    38
  31  |   10   13    9   18   32    5   22   15   15   16    5 |    21   26   13   24   36   16   25   22   23   15    17
  32M |    7    8   10   12   20    7   11    8    9   17    4 |    20   23   24   22   22   20   24   25   24   28    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   12   14   22    6   13   18   12   15      |T   33   36   31   34   37   29   34   33   34   30    30
 WRMS |    9   13   12   13   19    5   12   15   11   15      |NE  20   26   18   23   25   17   23   20   22   16    18
 MEDI |    9   12   12   13   20    6   12   15   11   13      |MD  22   27   20   23   26   17   24   21   24   19    19

Table 3.1807.2   GPS week: 1807   Day: 2   MJD: 56895.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    7   12   13   13   16    5    9   13   13    7    4 |    31   32   35   35   35   32   35   30   35   35    33
   2E |    7   11   10   12   16    6   12   14    9   10    4 |    24   27   24   26   23   20   21   25   22   16    21
   4E |   18   22   14   23   21   11   16   31   22   25    7 |   165  169  166  168  172  169  169  178  172  173   170
   5  |    9   12   15   12   18    5   12   15    8   13    4 |    22   33   27   22   30   20   29   22   24   20    23
   6E |   11   11   15   13   49    7   11   14    8   11    5 |    26   23   28   24   22   19   24   24   24   19    21
   7  |    9   16    7   11   18    4   18   14   10   15    4 |    22   25   13   24   30   18   25   19   24   17    18
   8E |   10   18   13   13   17    7   17   21   17   17    5 |    82   83   79   78   82   76   81   87   79   78    79
  X9  |   22   14   14   12  ---   10  ---   13   15  ---    7 |    29   25   23   22  ---   23  ---   20   20  ---    23
  10  |   12    8   14    9   15    5    8   12    9   12    4 |    21   21   18   19   20   14   17   19   20   17    16
  11  |    8    7   13    9   23    4    9   15   13    6    4 |    19   20   12   20   32   12   17   17   22   14    16
  12  |    9   13   10   16   21    5   14   13   10   17    4 |    22   28   17   24   28   14   20   22   20   19    17
  13  |    9   12   13   15   19    6   11    9   11   16    4 |    23   28   18   26   31   19   26   19   19   21    20
  14  |   13   12   13   18   17    5   13   15   17   18    5 |    23   24   19   21   22   16   23   25   26   17    19
  15  |   10   13   15   13   16    4   12   14   11   14    4 |    23   24   19   29   26   16   21   22   23   20    19
  16  |   10   15    9   18   24    4   12   19   16   16    5 |    15   23   14   19   26   11   19   20   19   13    13
  17  |   11   12   16   13   18    7   14   14   10   26    5 |    25   30   19   27   32   18   24   26   23   23    19
  18  |   12   17   14   17   19    4   12   16   13   14    5 |    24   24   18   25   24   16   22   25   17   15    18
  19  |   10   14   12   14   19    8   12   15   10   21    5 |    17   24   16   19   26   14   20   17   14   19    13
  20  |   10   13   14   15   24    5   13   12   11   15    5 |    28   27   23   31   32   24   25   26   25   23    24
  21E |    8   13    9   12   18    4   10    8   14    9    4 |    25   24   23   29   30   20   21   21   27   22    21
  22  |   10   15   13   17   16    3   15   15   11   11    4 |    26   30   21   32   32   23   26   31   24   19    24
  23  |    9   10   13   15   15    6   12   11    9   16    4 |    19   22   16   21   22   14   21   17   16   10    15
  24  |    5   10   14    8   17    5   13   11   12   12    4 |    20   21   26   21   24   17   21   20   17   18    18
  25  |   10   10   13   12   15    5   12   10   10   12    4 |    24   28   23   20   25   16   27   19   20   20    21
  26  |    6    9   13    7   15    4    7   10   13   13    3 |    20   20   15   23   24   17   17   19   23   18    17
 X27  |   11   11   11    9  ---    7   14   21   10   13    4 |    20   21   20   21  ---   16   27   21   20   17    18
  28  |    7   11   14   13   19    7   12   15   13   17    4 |    21   25   17   27   29   16   22   22   22   14    17
  29  |    9   14   14   16   21    6   13    9   10   16    4 |    27   30   23   23   25   19   26   25   25   20    22
 X30E |   10   14   14    6  ---    3   11   16    8    7    4 |    49   50   48   46  ---   46   50   45   49   46    46
  31  |    7   14    6   17   30    5   23   16   14   16    5 |    20   25   13   25   37   18   27   24   30   17    19
  32  |   10    9   10   14   22    8    7   14   10   16    4 |    19   23   21   23   26   17   22   20   21   26    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   13   13   14   21    6   13   15   12   15      |T   30   32   27   31   34   25   30   29   29   26    27
 WRMS |    9   13   13   13   19    6   12   13   10   16      |NE  22   25   18   23   27   16   23   21   21   17    18
 MEDI |   10   12   13   13   18    5   12   14   11   14      |MD  23   25   20   24   26   18   23   22   23   19    19

Table 3.1807.3   GPS week: 1807   Day: 3   MJD: 56896.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    8   12   11   10   17    4   12   16   13    7    4 |    43   44   45   45   40   43   46   46   44   43    43
   2E |    9   13    8   11   20    7   19   13   10   11    4 |    26   28   23   27   26   21   23   28   29   20    23
   4E |   17   20   10   17   22    9   16   27   13   24    6 |   221  219  219  216  213  216  219  222  218  218   218
   5  |    8   14   13   14   19    4   14   12   13   14    4 |    26   33   28   24   30   22   29   22   29   24    24
   6E |    7   11   13   12   47    8   10   10   15   12    5 |    25   28   28   25   23   22   26   25   27   23    23
   7  |    9   16    8   10   18    4   18   12   11   14    4 |    25   27   16   26   31   18   24   22   23   16    19
   8E |   15   18   12   17   21    7   17   20   11   18    5 |   153  151  154  148  153  150  153  152  152  152   151
  X9  |    2  ---  --- >>>>  ---  362  ---  ---  ---  ---    0 |     1  ---  ---    1  ---    1  ---  ---  ---  ---     1
  10  |   15   12   10   11   19    4   14   11   10   15    4 |    23   18   17   20   19   16   18   20   21   18    16
  11  |    6    7    9    9   23    5    9   12   12    7    3 |    24   25   18   21   34   16   22   21   25   18    20
  12  |    8   17   12   14   20    6   15   10   12   13    4 |    22   29   18   23   27   15   22   21   22   15    18
  13  |   10   14   13   14   19    4   12    9   10   16    4 |    23   31   20   29   31   20   26   21   18   20    21
  14  |   14   11   13   19   11    4   11   16    9   16    4 |    25   29   21   25   26   22   26   31   23   21    23
  15  |   11   13   14   12   17    6   13   13    9   15    4 |    25   30   20   28   29   17   23   27   21   20    21
  16  |   13   16   11   18   21    3   15   16   13   17    5 |    19   27   20   24   23   13   21   22   17   20    16
  17  |   10   12   14   15   20    5   14   14   13   25    5 |    26   31   21   34   33   20   24   28   24   22    22
  18  |   11   19   14   17   18    4   12   16   12   12    5 |    23   31   20   31   29   21   26   28   19   18    21
  19  |    9   15   11   13   20    4   14   13   12   17    4 |    19   28   17   21   27   13   23   21   18   19    17
  20  |   12   14   13   15   22    4   15   13   10   12    4 |    38   34   34   39   34   33   35   34   34   35    33
  21E |   11   12    8   10   12    6   10    7   11    9    3 |    19   21   16   21   22   16   17   17   18   20    17
  22  |   10   14   15   17   17    3   12   17   12    9    4 |    26   33   23   35   34   26   29   35   24   22    26
  23  |   10   12   12   13   18    4   12   10   12   17    4 |    20   25   17   24   20   14   20   18   18   12    15
  24  |   14    9   13   10   17    8   14   10   12   11    4 |    24   23   26   22   26   19   22   20   23   20    20
  25  |    9   10   12   10   16    5   12   11    9   10    3 |    22   26   23   22   25   16   27   21   21   21    21
  26  |    6    9   12    6   16    6    6    9    7   11    3 |    20   23   18   25   26   19   16   20   21   16    18
 X27  |   11   11   13   10  ---    5   12   20   10   11    4 |    21   25   21   21  ---   19   27   25   21   21    21
  28  |    7   14   14   13   20    5   16   13   11   15    4 |    19   24   17   28   30   15   20   23   20   16    17
  29  |    9   16   12   15   21    7   15   12   14   15    5 |    29   34   27   27   27   22   30   30   26   27    25
 X30  |    6   10   13    8  ---    3   12   11    7    9    3 |    79   80   79   81  ---   76   79   75   77   76    78
  31  |    7   14   10   18   26    5   20   15    9   14    5 |    17   28   14   25   36   15   26   24   25   17    19
  32  |   10   12    9   11   20    8    8   14    8   14    4 |    26   29   27   27   25   25   26   26   25   27    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   14   12   14   21    6   14   14   11   15      |T   35   40   34   37   39   31   37   37   36   33    33
 WRMS |   10   14   12   13   19    6   13   13   11   15      |NE  21   27   20   24   27   17   23   23   21   19    19
 MEDI |   10   13   12   13   19    5   13   13   11   14      |MD  24   28   21   25   27   19   26   24   23   20    21

Table 3.1807.4   GPS week: 1807   Day: 4   MJD: 56897.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    6   14   13   11   17    6   11   18   16    7    4 |    23   25   22   20   18   18   23   28   18   21    19
   2E |    9   13    7   11   21    7   12   13   10    9    4 |    25   24   19   23   20   18   17   24   22   17    20
   4E |   12   28   17   15   22   11   16   29   19   23    7 |   107  112  105  104  103  101  108  114  105  109   105
   5  |    8   13   14    8   19    5   11   13    9   13    4 |    23   30   26   21   29   19   25   21   22   18    21
   6E |    9   10   13   11   47   10   10   14   14   12    5 |    25   26   27   24   22   23   23   23   24   24    23
   7  |    8   17   11   11   19    5   18   11   11   12    4 |    24   30   19   24   30   18   25   22   25   16    20
   8E |   13   19   13   17   18    8   16   20   19   21    6 |    97  105  102  100  102  101  103  103   99  104   101
  X9  |    2  ---  ---  ---  ---   52  ---  ---  ---  ---    0 |     1  ---  ---  ---  ---    1  ---  ---  ---  ---     1
  10  |    6   11   13   10   18    4   10   12    7   12    3 |    23   24   21   20   22   17   18   22   18   18    19
  11  |    8    9   12    8   24    5    9   15   11    7    4 |    21   23   18   21   32   14   18   21   18   17    18
  12  |    9   12   12   14   23    6   14   14    8   16    4 |    23   31   22   28   29   21   24   25   23   24    22
  13  |    8   12   13   14   19    6   12   10    9   17    4 |    18   31   21   25   28   21   27   23   21   23    22
  14  |    9   11   15   12   13    5   12   16   14   19    4 |    23   29   24   26   23   22   26   32   28   23    24
  15  |    9   14   16   12   14    5   14   15   15   18    5 |    24   30   21   32   26   22   25   28   26   26    24
  16  |   11   13   12   17   21    6   13   14   15   16    5 |    23   27   21   23   24   18   24   23   21   20    19
  17  |   10   13   13   15   18    7   13   13   12   23    5 |    24   31   21   32   31   21   24   28   22   21    21
  18  |    9   15   17   18   17    5   14   15    9   11    5 |    22   30   21   29   24   21   23   24   23   16    21
  19  |    9   14   14   13   22    6   13   17   10   16    4 |    21   29   21   21   26   15   24   25   16   21    19
  20  |    8   14   14   14   22    7   14   15   10   14    4 |    20   22   25   26   21   22   22   25   20   28    20
  21E |    9   10    8   11   17    4   12    9   14    9    4 |    23   24   20   24   28   20   22   22   22   22    21
  22  |   10   13   17   12   15    4   14   19   11    9    4 |    27   33   21   34   31   25   28   36   29   20    26
  23  |    9   11   12   13   18    5   11   11   10   16    4 |    17   26   19   18   19   16   22   20   19   14    17
  24  |    7    9   14   11   15    6   13   13   11   10    4 |    22   25   26   26   25   20   21   22   23   22    21
  25  |    9   11   14   10   17    4   11   12    8    9    3 |    23   33   29   25   27   23   26   28   24   28    26
  26  |    6   11   12    9   18    4    8   12    8   10    3 |    22   27   20   28   22   19   20   23   22   21    21
 X27  |   11   10   15   10  ---    8   13   20   12   11    5 |    23   27   21   20  ---   20   30   26   24   18    22
  28  |    8   16   13   13   18    5   13   14    9   14    4 |    23   26   19   26   30   18   23   24   20   17    20
  29  |    8   15   16   12   22    6   16   14   11   15    5 |    30   35   29   29   29   26   31   31   31   28    28
 X30  |    8   12   13   12  ---    5   11   17    9    9    4 |    46   49   50   47  ---   47   50   40   48   47    47
  31  |    9   13   10   15   30    6   17   14   13   13    5 |    19   29   18   26   35   19   25   23   25   20    20
  32  |    9   10   10   11   20    7    9   14    9   14    4 |    18   21   19   17   17   14   19   20   19   21    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   14   13   13   21    6   13   15   12   14      |T   27   33   28   30   31   25   29   30   28   27    26
 WRMS |    9   14   13   13   19    6   13   14   10   16      |NE  21   29   22   25   26   19   24   25   23   20    20
 MEDI |    9   13   13   12   18    6   13   14   11   13      |MD  23   29   21   25   26   20   24   24   22   21    21

Table 3.1807.5   GPS week: 1807   Day: 5   MJD: 56898.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    5   10   12   10   14    4   12   17   14    8    4 |    38   39   39   39   35   37   41   43   39   37    38
   2E |    6   11    8   11   20    7   13   14   12    7    4 |    27   27   25   28   26   24   22   27   31   20    25
   4E |   13   16   12   15   17   10   16   31   15   21    6 |   207  212  206  207  211  207  212  216  210  210   209
   5  |    9   14   13   15   20    6   14   15   10   10    4 |    26   33   25   25   33   22   28   25   28   21    25
   6E |    7   14   13   16   48    6   12   15   14   10    5 |    25   26   27   25   24   21   24   23   28   25    24
   7  |    8   13    8   11   19    4   17   11    9   13    4 |    21   27   16   24   30   18   22   20   22   15    19
   8E |   11   20   13   15   18    7   16   21   15   19    5 |   131  133  134  130  133  131  134  137  133  135   133
  X9  |    2  ---  ---  ---  ---   71  ---  ---  ---  ---    0 |     1  ---  ---  ---  ---    1  ---  ---  ---  ---     1
  10  |    6    9   13   10   17    4    9   11   11   12    3 |    23   24   22   20   23   18   19   23   24   21    21
  11  |    7    7   11    7   25    5   12   14   10    8    4 |    21   23   15   22   35   16   21   18   24   16    19
  12  |    8   13   12   16   18    6   13   16   11   17    4 |    20   27   15   23   27   14   18   21   21   18    16
  13  |    6   11   13   13   18    4    9    8   11   16    4 |    20   30   20   22   28   17   25   22   20   22    21
  14  |   10   10   14   18   12    3   11   19   10   17    4 |    17   24   20   23   19   15   23   25   19   13    17
  15  |    9   12   14   13   12    5   13   15   14   16    4 |    25   28   20   28   23   18   21   23   19   20    21
  16  |   10   14   11   17   22    8   13   15   13   16    5 |    16   24   16   21   25   15   20   19   22   14    15
  17  |   10   14   12   17   18    5   12   13   12   24    5 |    24   29   18   28   29   17   23   24   19   18    18
  18  |    8   14   16   19   18    6   12   16    9   12    5 |    22   31   21   28   26   22   27   21   25   15    21
  19  |    9   15   12   15   22    5   12   15   11   18    5 |    19   28   17   19   25   13   22   21   15   17    16
  20  |   11   20   13   13   20    5   14   15   11   11    5 |    30   35   29   33   32   29   32   32   32   31    29
  21E |    8   13   10    9   36    4   11   10   11    9    4 |    20   27   19   23   27   16   22   16   18   18    18
  22  |    8   13   16   18   17    6   13   21    9   10    5 |    21   31   19   26   30   21   28   31   22   15    21
  23  |    9   11   12   11   16    5   11   10   14   17    4 |    19   25   18   17   17   14   20   18   21   13    16
  24  |    6   13   12   14   12    4   11   13   11   11    4 |    22   24   27   27   25   19   21   20   21   21    21
  25  |    9   13   14   10   14    6   12   12   10    8    4 |    24   33   25   25   26   19   24   23   23   21    23
  26  |    6   11   11   10   14    5    7   15   13   10    3 |    20   22   19   23   21   18   16   19   21   16    18
 X27  |    8   13   15   10  ---    6   13   16   11   12    4 |    22   23   19   18  ---   17   28   20   23   19    20
  28  |    7   12   11   14   20    5   14   15   12   15    4 |    15   23   15   24   28   13   20   19   16   14    14
  29  |   10   14   14   12   17    6   11   18   10   14    4 |    26   31   25   25   26   21   27   27   25   21    23
 X30  |    6   14   13    8  ---    4   13   15    8    9    4 |    38   42   42   41  ---   38   42   37   44   37    39
  31  |    9   11   10   15   27    5   18   18   11   11    5 |    15   26   14   23   34   14   25   24   23   14    17
  32  |    8    9   10   11   19    6   10   12   13   16    4 |    22   26   25   26   26   22   27   26   26   30    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   12   14   21    6   13   16   12   14      |T   31   37   31   34   37   28   34   34   33   30    30
 WRMS |    9   13   12   13   18    5   12   14   11   14      |NE  19   27   19   23   26   16   22   22   21   17    18
 MEDI |    8   13   12   13   18    5   12   15   11   12      |MD  22   27   20   25   26   18   23   23   23   19    21

Table 3.1807.6   GPS week: 1807   Day: 6   MJD: 56899.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |    7   14   13    8   14    5   12   18   15   11    4 |    36   35   43   40   39   36   38   40   40   41    38
   2E |   10   13    7    9   17    6   11   14   13    8    4 |    30   33   25   30   26   25   25   29   28   21    26
   4E |    9   21   10   17   16    8   15   31   11   21    6 |   211  211  210  207  215  208  211  223  205  213   211
   5  |    9   13   14    8   20    4   13   16   13   14    4 |    30   38   31   28   36   27   33   28   30   24    29
   6E |    9   15   11   14   49    7   12   15   10   10    6 |    29   31   30   28   24   23   29   30   29   25    27
   7  |    7   14    7   13   16    6   17   12   12   13    4 |    25   28   17   27   29   18   22   22   23   15    20
   8E |   11   16   11   14   16   10   15   20   12   16    5 |   142  141  142  138  142  139  141  145  138  141   140
  X9  |   12   15   14   19  ---   10  ---   13   13  ---    6 |     1    8   10    1  ---    1  ---    3    4  ---     1
  10  |    8   10   12   11   14    6   10   18    8   10    4 |    27   26   21   25   23   21   25   29   22   22    23
  11  |    6    9   11    9   24    5   10   14    9   10    4 |    23   26   17   24   39   17   22   20   23   18    20
  12  |    9   14    9   15   19    7   14   18   14   19    5 |    23   29   17   27   31   16   23   22   18   19    18
  13  |   10   13   13   10   18    4   11    8   12   15    4 |    30   33   23   31   33   24   29   25   25   24    26
  14  |   10   10   13   11   12    6   12   17   10   15    4 |    25   31   26   30   29   25   30   33   29   25    26
  15  |    9   12   13   11   11    5   15   17   16   15    4 |    28   31   23   33   31   22   27   30   29   26    26
  16  |    9   15   13   19   23    5   13   15   11   14    5 |    21   29   17   28   29   17   24   22   19   16    18
  17  |    9   17   12   16   18    6   12   12   11   24    5 |    25   32   20   35   33   21   25   28   18   22    21
  18  |    6   14   15   17   17    5   11   16   11   16    4 |    27   32   23   37   31   27   28   29   30   18    26
  19  |    9   16   13   13   22    6   13   12   10   18    4 |    21   33   19   24   34   16   26   22   20   19    20
  20  |   10   19   13   13   17    5   14   15   12   10    4 |    30   33   27   37   35   29   28   32   30   28    29
  21E |    9   16    9   11   22    4   11   10   12    9    4 |    24   27   18   27   24   19   25   21   25   21    21
  22  |   11   14   14   17   16    5   13   20   12   10    5 |    32   38   27   44   39   32   32   42   35   24    32
  23  |    9   12   13   10   18    4   10    8   12   15    4 |    22   28   19   23   21   17   23   21   21   14    19
  24  |    9   10   11    9   11    5   14   17   12   13    4 |    25   26   28   27   26   21   23   21   21   23    23
  25  |    8   13   14    8   14    6   12   12   13   11    4 |    23   33   25   26   30   18   25   21   16   20    22
  26  |    8   11    9   10   14    4    8   19   14   12    4 |    25   26   22   28   29   22   21   25   22   23    23
 X27  |    6   11   16   11  ---    5   12   14   11   12    4 |    28   31   23   25  ---   22   32   26   26   22    25
  28  |    6   15   12   14   18    5   12   11   12   13    4 |    20   24   18   28   31   18   21   25   20   16    18
  29  |    9   14   15   13   16    8   12   24    9   18    5 |    33   39   32   31   34   29   35   35   35   30    31
 X30  |    5   17   11   13  ---    5   11   12    9    9    4 |    61   61   61   63  ---   58   60   56   59   58    59
  31  |    7   12   11   16   27    4   16   16   15   10    5 |    21   29   17   29   38   19   25   26   24   18    21
  32  |    8   12   11   13   17    3    8   12    9   15    4 |    22   27   23   22   26   19   23   23   24   27    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   14   12   13   20    6   13   16   12   14      |T   36   40   34   38   41   32   37   37   35   33    34
 WRMS |    8   14   12   12   18    5   12   14   11   15      |NE  24   29   21   27   30   20   26   25   23   21    22
 MEDI |    9   14   12   13   17    5   12   15   12   13      |MD  25   31   23   28   31   22   25   26   25   22    23



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 4.1807   GPS week: 1807   MJD: 56893.0-56899.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2946 |U    8     8    18 |U    5     6    21 |U    9     9    22 |
emr | emr 2926 |     9     9    21 |U    6     7    26 |     9    10    23 |
esa | esa 2934 |     9     9    19 |U    6     6    26 |    10    10    23 |
gfz | gfz 2923 |U    9     9    19 |U    6     8    25 |U    9     9    22 |
grg | grg 2688 |    10    10    27 |U   13    16    70 |U   10    11    22 |
igr | igr 2941 |     8     8    18 |     5     5    22 |     9     9    22 |
igs | igs 2931 |     8     8    18 |     5     6    25 |     9     9    22 |
jpl | jpl 2873 |     9     9    20 |U    6     7    26 |U   10    10    23 |
mit | mit 2934 |     8     8    20 |U    7     8    33 |U    9     9    21 |



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 5.1807.0   GPS week: 1807   Day: 0   MJD: 56893.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2972 |     6     6    13 |     5     5    19 |     7     9    18 |
emr | emr 2968 |     8     6    17 |     9     7    28 |     7     7    20 |
esa | esa 2976 |     8     7    16 |     7     6    26 |     8     6    22 |
gfz | gfz 2872 |     9     8    16 |     9    16    30 |     7     7    18 |
grg | grg 2688 |    10     8    25 |    15    24    75 |     7     8    21 |
igr | igr 2958 |     7     6    13 |     6     5    23 |     7     6    18 |
igs | igs 2972 |     7     6    14 |     6     6    25 |     6     6    18 |
jpl | jpl 2872 |     9     7    14 |     7     6    26 |     8     7    18 |
mit | mit 2976 |     9     7    16 |     8     8    41 |     7     8    19 |

Table 5.1807.1   GPS week: 1807   Day: 1   MJD: 56894.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     7     5    12 |     4     6    20 |     7     7    19 |
emr | emr 2968 |     8     6    17 |     6     6    23 |     7     9    21 |
esa | esa 2976 |     9     7    12 |     6     6    29 |     8     9    21 |
gfz | gfz 2968 |    10     9    15 |     6     6    25 |     7     7    18 |
grg | grg 2688 |     7     6    22 |    15    25    71 |     7    12    21 |
igr | igr 2976 |     8     8    12 |     5     5    22 |     7     8    19 |
igs | igs 2915 |     7     6    12 |     5     5    22 |     7     9    19 |
jpl | jpl 2872 |     9     8    16 |     7     5    23 |     7     8    22 |
mit | mit 2976 |     8     5    13 |     7     8    39 |     7     9    16 |

Table 5.1807.2   GPS week: 1807   Day: 2   MJD: 56895.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9    11    19 |     4     5    23 |     8    12    19 |
emr | emr 2968 |     9    11    25 |     7     7    31 |     9    12    20 |
esa | esa 2976 |     8    12    20 |     6     5    28 |    10    13    21 |
gfz | gfz 2968 |     8    11    20 |     6     6    28 |     9    11    22 |
grg | grg 2688 |    13    13    28 |    12    13    75 |     9    12    21 |
igr | igr 2976 |     8    10    18 |     5     4    21 |     9    12    22 |
igs | igs 2972 |     8    10    19 |     6     5    31 |     9    11    20 |
jpl | jpl 2872 |     9     9    20 |     7     7    28 |     9    11    21 |
mit | mit 2976 |     9     9    20 |     9     6    39 |     8    11    21 |

Table 5.1807.3   GPS week: 1807   Day: 3   MJD: 56896.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2880 |     6     6    17 |     5     8    23 |    13     8    26 |
emr | emr 2864 |     7     9    20 |     7     8    29 |    14     9    28 |
esa | esa 2880 |     6    10    19 |     6     7    28 |    15     9    28 |
gfz | gfz 2945 |     6     7    15 |     5     8    27 |    14     9    26 |
grg | grg 2688 |     8     7    23 |    10    16    66 |    13     8    22 |
igr | igr 2941 |     6     8    16 |     5     7    25 |    14     9    26 |
igs | igs 2953 |     6     8    17 |     6     8    30 |    13     8    25 |
jpl | jpl 2872 |     7     9    21 |     7     8    30 |    15    10    27 |
mit | mit 2880 |     7     8    16 |     7    11    36 |    12     7    24 |

Table 5.1807.4   GPS week: 1807   Day: 4   MJD: 56897.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2963 |     8    10    21 |     5     5    19 |     8     9    26 |
emr | emr 2872 |     8    12    22 |     5     7    22 |     8     9    26 |
esa | esa 2880 |     9    10    25 |     5     5    22 |     9    10    26 |
gfz | gfz 2873 |     9    10    24 |     5     6    17 |     8     7    26 |
grg | grg 2688 |    11    14    31 |    11    11    69 |    10    11    26 |
igr | igr 2880 |     9    11    22 |     4     4    17 |     9     9    25 |
igs | igs 2877 |     8    11    23 |     5     5    19 |     8     9    26 |
jpl | jpl 2872 |     9    12    22 |     5     6    18 |     9    10    27 |
mit | mit 2880 |     8    10    22 |     6     8    26 |     8     8    25 |

Table 5.1807.5   GPS week: 1807   Day: 5   MJD: 56898.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2880 |    10     8    26 |     7     7    22 |    10    13    19 |
emr | emr 2876 |    10    10    27 |     6     7    27 |    11    14    23 |
esa | esa 2880 |     9     8    23 |     7     7    28 |    11    13    21 |
gfz | gfz 2873 |    10     8    24 |     7     8    23 |    11    12    20 |
grg | grg 2688 |    11     9    30 |    14    14    64 |    12    13    18 |
igr | igr 2880 |    10     7    23 |     6     6    24 |    11    12    21 |
igs | igs 2877 |     9     8    25 |     6     8    25 |    11    12    21 |
jpl | jpl 2876 |     9     8    27 |     7     8    30 |    11    13    24 |
mit | mit 2880 |     9     8    28 |     8     9    27 |     9    11    17 |

Table 5.1807.6   GPS week: 1807   Day: 6   MJD: 56899.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2975 |    10     8    21 |     4     6    20 |     9     8    24 |
emr | emr 2972 |    11     8    20 |     4     8    20 |    10    10    24 |
esa | esa 2976 |    11     9    22 |     5     8    23 |    10     9    22 |
gfz | gfz 2968 |    11     8    21 |     5     8    21 |    10     8    23 |
grg | grg 2688 |    11    13    32 |    14    13    70 |    12    11    29 |
igr | igr 2976 |    10     9    22 |     4     7    21 |    10     8    22 |
igs | igs 2954 |    10     8    20 |     4     7    20 |    10     8    23 |
jpl | jpl 2876 |    12     8    21 |     5     8    25 |    10     9    24 |
mit | mit 2976 |    10     8    23 |     6     9    24 |    10     9    28 |


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 6.1807   GPS week: 1807   MJD: 56893.500-56899.500

                                                         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 |     -42     -31     103     -89     -1 |      23     29
            |      12      14      76      76      6 |       4
emr   uuuuu |      63     -30      26     218     10 |      56     60
            |      19       8      51      87     18 |       4
esa   uuuuu |       7      -1     -35     103     -1 |      16     23
            |       8      12      50      79      4 |       3
gfz   uuuuu |       8     -10      43    -118     -3 |      15     23
            |      17      26      81     179      5 |       3
grg   uuuuu |     -10       1     -67    -140     -3 |      59     62
            |      15      18     149      30      8 |       1
igr   xxxxx |       5     -10     -10     109      0 |      -1     19
            |      14      15      78      43      5 |       3
irf   xxxxx |      19      -2     -23     138      4 |      -1     17
            |       9      13      36      62      3 |       4
jpl   uuuuu |     -11      20      66     174     -4 |      37     47
            |      16      28      80      86     12 |       3
mit   uuuuu |       2      18    -234    -242      7 |      22     28
            |      22      27      59      84      3 |       4
ngs   uuuuu |     -32      34     -19     -91      0 |       9     20
            |      31      50      85     185     12 |       3
sio   uuuux |      44      15     -13     160     -4 |      48     51
            |      22      17      38      68      4 |       2


Table 7.1807.0   GPS week: 1807   Day: 0   MJD: 56893.500

                                                         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 |     -48     -45     -60     -52     -4 |      20     27
emr   uuuuu |      28     -28      58      57    -21 |      56     59
esa   uuuuu |      11       2      -9     180     -1 |      13     22
gfz   uuuuu |      23     -25      78     204     -6 |      13     22
grg   uuuuu |      -2     -11     125    -172     -9 |      58     61
igr   xxxxx |      -1      -9      29     136      1 |      -5     19
irf   xxxxx |      15     -26      41     101      6 |      -5     17
jpl   uuuuu |     -24      66     177      70     15 |      32     44
mit   uuuuu |       0     -21    -220    -165      6 |      19     25
ngs   uuuuu |     -24      46    -140    -199      4 |       9     21
sio   uuuux |      48      -6      54     117     -4 |      49     52

Table 7.1807.1   GPS week: 1807   Day: 1   MJD: 56894.500

                                                         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 |     -18     -24     138      28     -6 |      20     27
emr   uuuuu |      72     -25     -21     212      6 |      52     56
esa   uuuuu |      21       4       3     154     -2 |      13     22
gfz   uuuuu |      36     -28      88      12     -4 |      12     22
grg   uuuuu |      18       5    -165    -151     11 |      57     60
igr   xxxxx |      13      -4     104     118      1 |      -5     19
irf   xxxxx |      14     -10     -26      75      6 |      -5     17
jpl   uuuuu |     -38       6      41     161     -2 |      35     45
mit   uuuuu |     -39      -3    -249    -238      4 |      19     25
ngs   uuuuu |     -81      87     -65    -419      4 |       6     18
sio   uuuux |      44      -7     -14      90    -12 |      48     51

Table 7.1807.2   GPS week: 1807   Day: 2   MJD: 56895.500

                                                         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      -5     157     -68      2 |      21     28
emr   uuuuu |      79     -35      13     205      6 |      52     57
esa   uuuuu |       6      -9     -18     182     -1 |      15     23
gfz   uuuuu |      -3     -27     136     -68     -1 |      14     23
grg   uuuuu |     -20     -25      39    -152    -11 |      60     63
igr   xxxxx |     -24      12      21      58      4 |      -3     20
irf   xxxxx |       6      -8     -39      49      4 |      -3     19
jpl   uuuuu |      -2       3     -38     134    -11 |      36     47
mit   uuuuu |     -10      -3    -322    -311      7 |      20     27
ngs   uuuuu |      -7      67     -26     -54     -1 |       8     20
sio   uuuux |      16      15     -28      63     -5 |      47     50

Table 7.1807.3   GPS week: 1807   Day: 3   MJD: 56896.500

                                                         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 |     -41     -34      95    -134     11 |      21     28
emr   uuuuu |      62     -37      -4     248     34 |      54     58
esa   uuuuu |       5     -17       8      31      3 |      15     24
gfz   uuuuu |       9     -38     103    -274      1 |      15     23
grg   uuuuu |     -22      -1     100    -166      0 |      59     62
igr   xxxxx |       3     -37      -1      52      1 |      -2     20
irf   xxxxx |      19       4     -24     182      4 |      -2     18
jpl   uuuuu |       7      -8      49     109     -6 |      35     47
mit   uuuuu |      24      28    -213    -126      8 |      20     27
ngs   uuuuu |     -59      79     -79      89    -16 |       8     20
sio   uuuux |      42      27     -16     207      0 |      46     49

Table 7.1807.4   GPS week: 1807   Day: 4   MJD: 56897.500

                                                         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 |     -56     -25     154    -189     -6 |      25     31
emr   uuuuu |      80     -38      64     350      7 |      58     63
esa   uuuuu |       8     -10     -17     -12     -8 |      17     25
gfz   uuuuu |     -14      -2      28    -286    -10 |      18     24
grg   uuuuu |     -25      30    -232    -113    -11 |      60     63
igr   xxxxx |      16     -15     -34     122    -12 |       0     19
irf   xxxxx |      34      11     -58     212      0 |       1     17
jpl   uuuuu |     -15      47      63     166    -25 |      38     48
mit   uuuuu |       9      51    -292    -191      3 |      23     29
ngs   uuuuu |     -28     -43       9     107     17 |       8     20
sio   uuuux |      80      40     -50     240     -7 |      48     51

Table 7.1807.5   GPS week: 1807   Day: 5   MJD: 56898.500

                                                         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 |     -47     -44     140    -162     -3 |      25     31
emr   uuuuu |      69     -29     -30     243      9 |      57     62
esa   uuuuu |      -2      13    -122      46      0 |      17     24
gfz   uuuuu |       3      30     -54    -178     -7 |      17     24
grg   uuuuu |     -11      16    -166    -135     -3 |      58     60
igr   xxxxx |      10     -12     -37     103      1 |       0     19
irf   xxxxx |      27       9     -58     177      1 |       2     18
jpl   uuuuu |      -7       0     166     304     -3 |      37     47
mit   uuuuu |      23      33    -196    -327      7 |      24     30
ngs   uuuuu |     -40      18      76      -2      5 |      10     23
sio   uuuux |      55      12     -53     203     -2 |      48     50

Table 7.1807.6   GPS week: 1807   Day: 6   MJD: 56899.500

                                                         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 |     -44     -40      95     -47      2 |      29     32
emr   uuuuu |      47     -17     106     213     27 |      63     66
esa   uuuuu |      -1      12     -90     137     -1 |      21     25
gfz   uuuuu |      -2      19     -75    -234      3 |      20     24
grg   uuuuu |      -6      -6    -166     -88      4 |      61     63
igr   xxxxx |      14      -7    -149     176      0 |       5     14
irf   xxxxx |      18       5       5     170      7 |       6     14
jpl   uuuuu |       4      24       2     276      1 |      43     49
mit   uuuuu |       6      42    -148    -335     13 |      30     32
ngs   uuuuu |      11     -19      94    -157    -14 |      15     23
sio   uuuux |      19      22      16     197      0 |      51     53



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