[IGSREPORT-23022] Wk 1808 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri Sep 19 09:52:29 PDT 2014


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1808   (Aug 31, 2014 - Sep 06, 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:

igs1808[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1808[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1808[0-6].cls  IGS GPS clock combination summary report.
igs18087.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs18087.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   | SPT0
                0  |  EMR   | 4
                0  |  ESA   | SFER SFER UNSA URUM
                0  |  GFZ   | 1 2 6 30 1 6 30 DRAG SFER DRAG SFER
                0  |  GRG   | 6 4 6 NKLG USNO XMIS ADIS NKLG USNO XMIS
                0  |  JPL   | 4
                0  |  MIT   | 10 11 24 26 27 4 10 11 18 24 26 27 BRMU MDVJ
                1  |  COD   | KARR CHUR KARR
                1  |  EMR   | 4
                1  |  ESA   | KARR UNSA
                1  |  GFZ   | 1 2 6 30 1 6 30 KELY HOB2 KELY
                1  |  GRG   | 6 4 6 GRAZ HOB2 IRKJ NYA1 NYAL PDEL QAQ1 FAA1 GRAZ
                1  |  GRG   | HOB2 IRKJ NYA1 NYAL PDEL
                1  |  JPL   | YELL
                1  |  MIT   | 9 4 9 HOB2 TLSE HOB2 TLSE
                2  |  EMR   | 4
                2  |  ESA   | WTZR DRAG UNSA WTZR
                2  |  GFZ   | 1 2 6 30 1 6 30 ALRT CAS1 DRAG HOLM INVK MATE YELL
                2  |  GFZ   | ALRT CAS1 HOLM INVK MATE
                2  |  GRG   | 6 4 6 IRKJ KELY LAMA MAL2 MONP WTZR IRKJ KELY LAMA
                2  |  GRG   | MAL2 MATE WTZR
                2  |  JPL   | 4
                2  |  MIT   | 19 21 28 1 4 10 11 19 27 MDVJ MONP
                3  |  COD   | ALRT HOB2 TSKB
                3  |  EMR   | 4 4
                3  |  ESA   | MAL2 UNSA
                3  |  GFZ   | 1 2 6 30 1 6 30 ALRT CAS1 INVK MAL2 TLSE CAS1 INVK
                3  |  GFZ   | NAIN TLSE
                3  |  GRG   | 4 6 4 6 BJFS FAA1 HOB2 KOUC NKLG NRIL TLSE ALRT BJFS
                3  |  GRG   | FAA1 HOB2 KOUC MAL2 MONP NKLG NRIL TLSE
                3  |  JPL   | 4 HOB2
                3  |  MIT   | 4 11 4 11 TLSE BAKO HNLC MDVJ MONP TLSE
                4  |  COD   | KARR
                4  |  EMR   | 4 4
                4  |  ESA   | KARR DRAG UNSA
                4  |  GFZ   | 1 2 6 30 1 6 30 ALRT BRAZ INVK KARR KELY MATE MAW1
                4  |  GFZ   | QAQ1 YELL ALRT BRAZ INVK KELY MATE MAW1 YELL
                4  |  GRG   | 6 6 MDVJ USNO KARR MDVJ USNO
                4  |  JPL   | 8 ALRT
                4  |  MIT   | 4 9 4 9 10 22 27 STJO
                5  |  EMR   | MCM4
                5  |  ESA   | REUN REUN UNSA
                5  |  GFZ   | 1 2 6 30 1 6 30 INVK MCM4
                5  |  GRG   | 6 6 DRAG FAA1 GRAZ MCM4 FAA1 KELY
                5  |  JPL   | IRKJ
                6  |  COD   | HOB2 HOB2 NRMD
                6  |  EMR   | HOB2 HOB2
                6  |  ESA   | DRAG
                6  |  GFZ   | 1 6 30 1 6 30 DRAG MAL2 MAL2
                6  |  GRG   | 6 6 BOR1 GRAZ HOB2 MCM4 MOBS USNO DRAG HOB2 MOBS
                6  |  GRG   | USNO
                6  |  MIT   | 12 25 9 12 25 27 HOB2 FLIN HOB2 MDVJ WTZR

 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. 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.

 7. Small rotations were applied to all the AC orbit and ERP values in order to
    align them to the current IGS reference frame. These 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 |   -1.0     .3     .5     -31     18     12     .23
       EMR  |   0 |    2.6    9.9   12.7     -25     10    -35    -.04
       ESA  |   0 |     .2     .4   -2.1       2     -8     32    -.16
       GFZ  |   0 |     .2    -.2   -1.5     -37    -77      7    -.09
       GRG  |   0 |   13.5    4.2   -3.1     -28      9     -4     .17
       JPL  |   0 |   -1.7   12.3    4.7     -53      8     34    -.33
       MIT  |   0 |    4.8    2.3    7.3      -1     11    -35     .06
       NGS  |   0 |    6.0   -2.6   19.6     -53    -48     24    -.07
       SIO  |   0 |     .7    3.9  -11.0      20     25     -1    -.12

       COD  |   1 |    -.5    -.3     .5     -38     24    -23     .08
       EMR  |   1 |   -2.4    7.2    2.5     -18      3    -22     .16
       ESA  |   1 |    -.1     .4   -2.4       3     -5     36    -.19
       GFZ  |   1 |     .2     .2   -1.5     -27    -52     -9    -.11
       GRG  |   1 |    5.1   -4.7    2.2     -30     24      1     .37
       JPL  |   1 |    1.5   12.1    5.1     -82     16      8     .03
       MIT  |   1 |     .4    2.7    5.1      -6     14    -43     .18
       NGS  |   1 |    -.6    -.3   16.5     -38    -24     -5     .45
       SIO  |   1 |    -.1    6.6  -14.0       3     20     -4     .03

       COD  |   2 |   -1.2    -.6    -.2     -57     44    -21     .06
       EMR  |   2 |   -2.5    8.1    6.0     -11      9    -24     .19
       ESA  |   2 |     .1    1.0   -1.7     -10    -14     39    -.20
       GFZ  |   2 |     .1     .1   -1.3     -38    -53      8    -.35
       GRG  |   2 |   14.9   -1.5     .2     -34     25    -11     .53
       JPL  |   2 |   -1.2   11.7   10.3     -78     35     16    -.39
       MIT  |   2 |    1.4     .9    4.0      -7     18    -37     .06
       NGS  |   2 |   -2.0   -3.3   11.7     -41    -10    -24     .18
       SIO  |   2 |     .8    2.6   -8.4      12     18     -3    -.14

       COD  |   3 |   -1.3    -.6    -.1     -55     24     -3    -.02
       EMR  |   3 |    2.2    7.4    9.0      -6     14    -30     .12
       ESA  |   3 |    -.4    1.3   -2.1       1      0     34    -.30
       GFZ  |   3 |     .1    -.4   -1.1     -31    -54     -4    -.26
       GRG  |   3 |    9.7   -3.6   -5.4     -37     32     26     .36
       JPL  |   3 |   -1.2    9.5    9.5     -59     30    -14    -.27
       MIT  |   3 |    1.6    2.0    4.4      -3     17    -41     .09
       NGS  |   3 |     .1   -4.3   13.2     -40    -17     -6     .40
       SIO  |   3 |    3.9    4.1  -12.3      13     13     -4    -.08

       COD  |   4 |   -1.4    -.6    -.2     -66     49    -33     .07
       EMR  |   4 |    -.3    3.9    8.4     -10     15    -18     .12
       ESA  |   4 |    -.1     .9   -2.2      -3      3     38    -.14
       GFZ  |   4 |    -.4    -.1   -1.0     -31    -42    -10    -.19
       GRG  |   4 |   21.7   -2.0     .0     -36     33    -20     .42
       JPL  |   4 |   -1.0    2.0   10.5     -64      2    -10    -.05
       MIT  |   4 |    2.2    -.5    9.4     -10     17    -41     .11
       NGS  |   4 |   -3.3   -3.6   13.6     -42     -9    -26     .50
       SIO  |   4 |    4.6    2.8   -6.4     -11     34    -14    -.06

       COD  |   5 |   -1.3     .3   -1.4     -46     14     12     .04
       EMR  |   5 |   -2.1    4.3    9.6     -11      4     -9     .28
       ESA  |   5 |     .2     .4   -2.2      -1      1     24    -.07
       GFZ  |   5 |    -.5    -.6   -1.4     -33    -38     -9    -.0 
       GRG  |   5 |   10.4     .0    3.0     -28     43     -7     .60
       JPL  |   5 |   -7.0    6.0    7.4     -52     58    -27    -.04
       MIT  |   5 |    1.0   -2.4    7.2     -12     19    -44     .06
       NGS  |   5 |   -6.6    -.4   14.4     -36      8    -40     .32
       SIO  |   5 |    2.4    3.1   -5.1      -7     25    -12    -.02

       COD  |   6 |    -.6    -.2     .3     -40      7      3     .09
       EMR  |   6 |    -.4    7.1    4.6       0      8    -15     .18
       ESA  |   6 |     .3     .6   -1.7      -4     -6     31    -.09
       GFZ  |   6 |    -.3    -.2   -1.7     -45    -46    -11     .17
       GRG  |   6 |   12.2    3.7    1.8     -15     21    -25     .61
       JPL  |   6 |   -2.9    2.2   13.7     -87     47    -12    -.10
       MIT  |   6 |    -.7     .4    9.9     -11     16    -41     .20
       NGS  |   6 |   -4.9   -6.2   24.1     -90    -19    -42     .71
       SIO  |   6 |    1.6    4.6  -10.4       0     39    -15    -.07


 8. 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.

 9. 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 1.1808.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1808.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 2.1808.[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 3.1808.[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 5.1808.0-6). 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 1808 summary.                       (Aug 31, 2014 - Sep 06, 2014)

Table 1.1808.a   GPS week: 1808   MJD: 56900.000-56906.000

         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  251|    0     0     0    19    31     3   .10    9    9 |   -1120      -6     17    108
        |    0     0     0    16    22    14   .02           |     463     721
emr   79|    0     1     1     1   -22    25   .32   13   13 |    1665    -389     14    142
        |    1     1     1    11     8    11   .02           |    1227     956
esa  150|    0     0    -4     1    -9    19  -.27   12   13 |    -348    -573     10    156
        |    1     0     0    22     8     9   .02           |     901    1487
gfz  193|   -1     0     3     5   -31    -5   .18   14   13 |    -202       5     14    141
        |    0     0     2    18    13     9   .03           |     282     478
grg  174|    5     0    -5     6    13     0   .39   20   17 |    -260      27     17    137
        |    1     1     1     9    22    18   .05           |     232     469
igr  n/a|    0     0     0    -7     4    11  -.14    5    5 |    3424    -550     16     98
        |    0     0     1    13    10    12   .02           |    1565     802
jpl   80|    0     0    -1   -26    15     4   .06   13   13 |    1628    -362     16    130
        |    0     1     1    16    17     6   .01           |    1239     841
mit  350|    0    -3     3   -18   -33    -4  -.08   14   12 |    -165    -144     28    226
        |    0     0     0    20    19    12   .04           |     205     430
ngs  225|   -1     1     3    -2    32   -46   .01   11   10 |   -1068      12   1292   2760
        |    1     1     3    60    39    20   .05           |     505     777
sio  514|    0    -1    -2   -10   -29   -11  -.64   15   15 |     ---     ---    ---    ---
        |    1     0     0    14    18    21   .05           |     ---     ---


Table 1.1808.b   GPS week : 1808   MJD: 56900.000-56906.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         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 2.1808.0   GPS week: 1808   Day: 0   MJD: 56900.000                            

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     0    32     7     2   .12    9    9 |   -1811    1217     16    108
emr   79|    0     3     1    16   -38     7   .33   13   13 |    2576    1514     14    136
esa  150|    1     0    -4    30     0    12  -.30   13   13 |    -911     891     10    147
gfz  194|   -2     0     7    23   -27     4   .13   15   13 |    -601     772     16    148
grg  177|    4     0    -3    -2    19    -6   .34   20   17 |    -613     846     17    133
igr  n/a|    0     0     0     3     4     7  -.13    6    5 |    5174    1014     18    110
jpl   80|    0     0     0    -2    -9     7   .05   13   13 |    2691    1477     18    132
mit  350|    0    -3     2     0     0    13  -.02   13   11 |    -382     642     27    224
ngs  229|   -1     1     1  -109    55   -47  -.00   13   12 |   -1836    1360   1261   2635
sio  527|   -1    -2    -3    18     1    -3  -.55   15   15 |     ---     ---    ---    ---

Table 2.1808.1   GPS week: 1808   Day: 1   MJD: 56901.000                            

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|    1     0     0    19     6    10   .11    9    9 |    -953    -362     17     95
emr   80|   -1     0    -1    11   -12    16   .30   14   14 |    3297    -858     14    144
esa  150|    1     0    -3    11   -20    17  -.27   12   13 |     818   -3174     10    174
gfz  193|   -1     1     5    18   -10     0   .17   14   13 |     -11      71     19    151
grg  173|    3     0    -3    19    12    -8   .35   20   17 |    -140    -102     19    143
igr  n/a|    0     0     0   -11     5     3  -.16    5    5 |    5344   -1176     17     98
jpl   80|    0    -1    -3   -24    35    10   .07   14   14 |    3423    -861     17    115
mit  350|    0    -2     3     0   -52     9  -.05   13   12 |      59    -480     26    231
ngs  224|   -1     2     4   -41    70   -60   .00   12   11 |   -1029      99   1479   2397
sio  534|    0     0    -1    -6   -46     4  -.63   14   16 |     ---     ---    ---    ---

Table 2.1808.2   GPS week: 1808   Day: 2   MJD: 56902.000                            

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  252|    1     1     0    -3    49     0   .12    9    9 |    -813    -404     17    104
emr   80|   -2     2     1    -4   -24    28   .31   13   13 |    2833   -1191     16    139
esa  150|    0     0    -3    -2   -22    28  -.25   12   13 |     220   -1128     10    145
gfz  192|   -1     0     3    -6   -35     7   .23   15   13 |     150    -266     16    135
grg  176|    4     0    -4    -5   -10    11   .35   19   17 |    -197     113     18    134
igr  n/a|    0     0     0   -21     3    -1  -.14    5    5 |    4541   -1101     16     82
jpl   80|    0    -1     0   -17    20     7   .06   12   12 |    2497    -615     16    120
mit  350|    1    -3     3   -11   -41    -6  -.05   13   12 |     -50    -276     27    257
ngs  226|   -1     1     0    37    43   -42  -.05   11   10 |    -688    -528   1313   2642
sio  526|    0    -1    -1   -10   -42   -20  -.61   15   16 |     ---     ---    ---    ---

Table 2.1808.3   GPS week: 1808   Day: 3   MJD: 56903.000                            

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  252|    0     1     0    27    21    10   .09    9    9 |    -627    -688     18    117
emr   80|    0     2     2    -8   -25    35   .28   13   13 |    1346   -1351     15    153
esa  150|    0     1    -3    -3    -1    12  -.25   12   12 |    -980    -365     10    149
gfz  194|   -2    -1     3   -24   -52   -13   .21   14   13 |    -381    -317     12    139
grg  175|    3     0    -7     8    45    29   .37   19   17 |       4    -412     16    126
igr  n/a|    0     0     0   -15   -11     1  -.14    5    5 |    3068   -1308     16     87
jpl   80|    0     0    -1   -41    17     7   .06   13   13 |    1356   -1024     16    124
mit  350|    0    -3     3   -59   -32    -9  -.08   13   12 |    -101    -279     30    222
ngs  225|    0     0     2    61    50   -44  -.01   10    9 |    -358   -1035    909   2577
sio  525|    0    -2    -2   -16   -35   -37  -.69   15   17 |     ---     ---    ---    ---

Table 2.1808.4   GPS week: 1808   Day: 4   MJD: 56904.000                            

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  249|    0     0     0    -3    70   -20   .11   10    9 |    -803    -529     17    112
emr   80|    0     0     1    12   -22    42   .34   14   14 |     350    -131     13    148
esa  150|   -2     0    -5    26    -2    27  -.27   12   12 |   -1781    1400     10    160
gfz  197|    0     0     1    24   -21    -7   .17   12   11 |    -428     436     13    140
grg  176|    5     1    -4    12    38    15   .40   19   16 |    -279     135     16    122
igr  n/a|    0     0    -1    -9    -1    18  -.12    5    5 |    2049    -291     17    104
jpl   80|   -1     0    -1   -15    -7     5   .03   13   13 |     567    -334     15    128
mit  350|    1    -4     3   -13   -31   -22  -.11   14   12 |    -186    -209     32    195
ngs  226|    0     1     4   -30   -40   -16   .08   10   10 |    -865    -326   1039   3006
sio  512|    1    -1    -2   -16   -10   -25  -.71   14   15 |     ---     ---    ---    ---

Table 2.1808.5   GPS week: 1808   Day: 5   MJD: 56905.000                            

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  252|    0     1     0    24    36    25   .09    9    9 |   -1129     -46     17    102
emr   80|    0     0     1    -4   -15    29   .32   13   13 |     311    -265     15    135
esa  150|    0     1    -3   -25    -6    32  -.26   11   12 |     -26    -806     11    156
gfz  190|   -1     0     3    14   -30    -7   .19   15   13 |    -218     -15     15    151
grg  173|    6     1    -5     0    -1   -13   .45   23   18 |     -68    -596     17    143
igr  n/a|    0     0    -1    16     3    21  -.14    5    5 |    1762    -686     16    127
jpl   80|    0     0    -2   -52    30     0   .07   14   14 |     271    -512     19    150
mit  350|    0    -4     4   -14   -16    -9  -.13   15   13 |       1    -616     27    210
ngs  223|   -1     0     1    29     0   -80   .00   11   10 |   -1135     -44   1550   3027
sio  517|    1     0    -3   -13   -42   -25  -.65   15   15 |     ---     ---    ---    ---

Table 2.1808.6   GPS week: 1808   Day: 6   MJD: 56906.000                            

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    -1    36    30     0   .06    9    9 |   -1709     768     18    119
emr   80|    2     3     0   -14   -19    21   .34   12   12 |     948    -441     14    141
esa  150|    0     0    -5   -25    -9     6  -.30   13   13 |     221    -830     10    161
gfz  192|   -1     0     0    -8   -39   -20   .15   14   13 |      71    -642     13    129
grg  173|    8     2    -8    12   -11   -24   .45   21   18 |    -533     208     18    164
igr  n/a|    0    -1    -2   -16    24    31  -.12    6    5 |    2035    -305     17     81
jpl   80|    1    -3    -4   -30    23    -7   .06   13   13 |     593    -671     16    147
mit  350|    0    -4     5   -29   -55    -8  -.12   15   14 |    -499     204     31    245
ngs  223|   -4     1    10    33    50   -31   .08   12   11 |   -1567     559   1494   3039
sio  461|    0     0    -2   -26   -27    25  -.66   14   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 3.1808.0   GPS week: 1808   Day: 0   MJD: 56900.000                            

        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   13   13   10   13    4   12   17   11   17    4 |    37   33   40   37   42   34   35   36   36   39    35
   2E |   13   11    8   12   19    6   15   20   11    7    4 |    45   45   43   40   39   41   41   50   45   42    43
   4E |   10   20   11   15   17    7   14   12   12   24    5 |    68   68   65   68   66   64   64   66   64   64    65
   5  |   10   13   15   13   19    4   15   12   13   11    4 |    23   30   23   23   28   18   27   16   24   14    19
   6E |    9   12   12   14   51    9   10   11   15   12    6 |    76   73   73   77   70   75   72   70   78   71    73
   7  |    8   14    9   12   17    5   14    8   14   14    4 |    22   27   14   27   30   16   22   21   20   18    18
   8  |    9   18   13   17   22   10   15   19   11   16    5 |    23   32   24   27   22   21   29   40   22   29    25
  X9  |   15   18   17   19  ---   10  ---   12   16  ---    7 |    33   37   39   40  ---   34  ---   33   33  ---    32
  10  |    8    9   11   10   19    5    9    9    9   11    3 |    20   20   18   24   23   16   19   20   13   19    16
  11  |   11   12   13   11   20    7   13    9   12   14    4 |    22   24   14   19   35   13   23   19   20   21    18
  12  |   10   15   12   18   20    4   17   21   14   15    5 |    26   29   23   28   29   18   25   19   21   19    19
  13  |    8   11   14   12   15    3   10    8   14   15    4 |    29   38   24   36   38   27   35   29   26   31    29
  14  |    9   10   14   15   13    5    9   15   10   17    4 |    27   31   26   33   31   27   29   35   28   24    27
  15  |    9   14   13   16   14    4   15   11   13   14    4 |    30   32   26   34   33   23   25   30   25   28    27
  16  |   11   15   13   17   21    6   12   13   11   15    5 |    19   27   19   25   30   16   20   20   20   17    17
  17  |   11   15   13   18   16    5   15   10   15   24    5 |    28   32   21   34   32   21   26   26   21   26    22
  18  |    8   14   15   22   19    6   17   17   14   18    5 |    19   26   17   33   24   18   25   24   25   13    17
  19  |   11   15   14   15   18    5   13   11   12   19    5 |    20   31   18   27   33   17   26   20   19   22    19
  20  |   10   12   13   13   19    4   12   12   12   12    4 |    29   27   20   35   36   25   26   29   25   19    24
  21E |    8   14    9   11   20    5    9    9   12    8    4 |    37   39   35   39   33   35   39   34   35   35    34
  22  |   11   14   15   20   16    7   13   13   14   15    5 |    24   30   21   39   32   25   28   31   33   16    25
  23  |   10   12   16   11   15    6   13   19   12   13    4 |    22   30   19   26   26   18   26   27   18   17    20
  24  |    8   12   12   14   16    4   14   10   12   12    4 |    24   27   26   23   26   19   23   22   22   21    21
  25  |   12   10   12   23   15    4   11   11   15    9    4 |    23   28   25   25   25   18   25   21   19   20    20
  26  |    7   11    9   11   12    4    7    7   11    9    3 |    28   27   21   29   29   23   25   25   23   25    24
 X27  |   13   10   15    9  ---    5   13   13   13   14    5 |    28   28   25   24  ---   22   31   24   25   17    23
  28  |    9   13   14   11   17    5   13    9   13   14    4 |    26   28   21   29   32   20   25   25   21   24    22
  29  |    9   15   14   14   16    5   13   13   14   17    4 |    33   40   33   33   32   30   36   31   33   31    31
 X30  |    6   19   12    9  ---    5   13    7   11   10    4 |    21   27   25   21  ---   20   27   19   24   18    21
  31  |    8   14   10   21   25    5   16   20   13   15    5 |    17   27   13   26   37   16   24   25   22   16    17
  32  |    9    9   12   12   16    4    9    9   10   16    4 |    19   20   17   22   24   15   19   19   17   21    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   13   15   20    6   13   13   13   15      |T   28   32   26   32   33   25   29   29   27   25    26
 WRMS |    9   13   13   13   17    5   13   11   12   15      |NE  24   29   22   28   29   20   25   25   23   21    21
 MEDI |    9   13   13   14   17    5   13   12   12   14      |MD  26   30   23   29   32   21   26   25   24   21    22

Table 3.1808.1   GPS week: 1808   Day: 1   MJD: 56901.000                            

        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   13   13    9   15    3   11   16   13   12    4 |    42   37   42   40   39   36   38   39   42   38    38
   2E |   10   12    9   12   18    7   14   18   10    9    4 |    27   29   25   27   27   23   23   28   24   22    23
   4E |    8   20   10   21   15    5   13   11   10   22    5 |    74   78   76   81   74   75   76   76   78   73    75
   5  |   10   13   13   15   18    5   15   10   11   11    4 |    20   27   18   26   24   14   23   16   18   12    17
   6E |    8   13   12   14   55    7   11   10    9   10    6 |    67   63   64   66   57   63   64   63   59   60    62
   7  |    9   15   11   12   18    4   16   10   13   13    4 |    23   26   15   25   29   16   21   20   21   14    18
   8  |    9   15   12   14   25    7   16   19   10   17    5 |    16   26   18   18   24   14   25   37   19   25    20
  X9  |   20   18   18   17  ---    9  ---   12   20  ---    8 |    31   29   24   24  ---   21  ---   22   30  ---    21
  10  |    7   11   12    8   14    6   11    9    8   11    3 |    18   18   15   19   20   15   16   17   16   16    15
  11  |    6   11   14   12   24    5   11   10    9   10    4 |    19   21   14   18   36   13   20   17   20   18    16
  12  |   10   13   10   14   16    6   19   23   17   16    5 |    20   22   15   26   27   13   21   19   22   14    15
  13  |   10   13   13   12   17    3   14    9   14   13    4 |    26   29   22   29   32   21   28   21   25   20    23
  14  |    7   11   14   16   13    4   10   11    8   16    4 |    19   26   21   20   24   17   23   20   24   19    19
  15  |    8   15   14   14   15    5   18   13   11   14    4 |    23   28   21   26   24   18   22   23   28   20    21
  16  |   10   16   12   21   20    6   15   16   11   17    5 |    18   23   15   26   28   13   20   19   17   18    14
  17  |   10   17   12   16   17    5   15   13   14   23    5 |    21   29   18   25   26   16   23   21   22   21    16
  18  |    8   15   15   20   19    5   14   15   11   16    5 |    15   26   17   25   23   14   20   14   23   11    14
  19  |    9   15   13   14   19    6   12    9   13   16    4 |    14   26   17   20   29   14   22   15   24   15    14
  20  |    7   13   14   12   19    4   13   11   10   12    4 |    27   26   22   34   32   23   25   27   31   17    25
  21E |    9   16    8   13   21    5    9    7    9   10    4 |    31   33   28   31   32   29   29   29   32   30    29
  22  |    9   16   14   17   17    3   13   12   10   12    4 |    20   28   18   28   30   19   24   19   27   11    19
  23  |    8   14   14   11   14    6   15   19   14   16    5 |    23   25   20   25   21   16   23   21   23   13    18
  24  |    8   10   11   13   15    6   12   11   13   10    4 |    19   20   23   21   22   16   22   20   22   17    18
  25  |   10   12   13   12   14    5   12    9   10    8    4 |    22   24   22   23   24   14   22   18   19   12    18
  26  |    8   11   10    9   13    6   13   11   12    9    3 |    21   22   17   24   23   19   21   21   27   20    19
 X27  |   11   11   13    9  ---    7   11    8   11   12    4 |    23   19   19   20  ---   17   25   17   19   12    18
  28  |    8   12   14   10   18    5   15   11   13   13    4 |    17   22   14   23   28   14   21   20   23   14    15
  29  |   12   14   15   14   16    6   13   14   16   18    5 |    24   29   26   25   26   20   28   22   25   22    21
 X30  |    8   11   12    8  ---    5   12   10   12   10    4 |    22   21   25   21  ---   19   25   16   21   16    19
  31  |    7   15   11   16   23    4   18   19   10   11    5 |    17   24   12   22   35   15   22   24   21   13    16
  32  |    8   10   13   13   18    5   10    9   11   15    4 |    18   19   17   21   20   14   20   17   22   20    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   14   12   14   20    5   14   13   12   14      |T   25   28   23   27   29   21   26   24   26   21    22
 WRMS |    9   14   13   13   17    5   14   12   11   16      |NE  20   24   18   23   26   16   22   20   22   16    17
 MEDI |    8   13   13   13   17    5   13   11   11   12      |MD  21   26   19   25   27   16   23   20   23   17    18

Table 3.1808.2   GPS week: 1808   Day: 2   MJD: 56902.000                            

        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   12   12   12   11    5   10   16   11   11    4 |    36   37   39   34   38   33   35   37   38   29    34
   2E |    9   13   10   15   18    6   12   12   12    9    4 |    47   49   47   46   43   44   44   45   43   42    44
   4E |   10   20   13   18   17    6   13   12   12   25    5 |    82   80   83   81   83   81   80   83   82   84    81
   5  |    9   12   13   12   17    4   13   11   10   12    4 |    25   27   20   25   29   15   22   15   23   12    19
   6E |   10   13   12   18   50    9   11   13   13   11    6 |    56   53   52   56   55   52   51   56   54   51    53
   7  |    8   14    8   12   20    4   16    9    8   13    4 |    20   26   13   25   31   14   21   19   19   13    17
   8  |    9    9   10   16   18    6   10   20   14   16    4 |    24   28   23   27   27   20   27   40   23   28    25
  X9  |   14   12   14   16  ---    7  ---   10    9  ---    5 |    31   32   30   29  ---   29  ---   29   29  ---    27
  10  |    7   11   14    9   13    5   10   10    9   10    3 |    18   19   15   19   19   13   18   16   16   14    14
  11  |    8    9   12   11   20    3    9    7    9    9    3 |    21   25   15   19   35   14   20   17   21   15    17
  12  |   10   14   15   14   19    5   16   22   12   14    5 |    24   25   20   26   29   16   22   19   22   14    16
  13  |    8   10   13   11   18    4   12    9    9   17    4 |    25   32   22   30   33   22   30   21   21   23    23
  14  |    9   10   13   21   10    4   11   13   12   16    4 |    23   28   23   34   26   21   27   23   21   20    22
  15  |   10   14   13   13   12    5   14   15    9   14    4 |    25   31   22   30   26   20   25   28   22   23    23
  16  |   11   15   11   17   21    5   14   14   10   16    5 |    17   25   16   24   29   14   20   19   21   15    15
  17  |   12   17   14   16   17    5   13   17   14   23    5 |    24   30   20   30   32   20   24   28   24   24    20
  18  |   10   15   13   19   19    5   14   15   10   18    5 |    21   26   18   32   26   17   24   19   24   13    18
  19  |   10   15   11   15   17    6   12   11   10   19    4 |    17   30   19   23   29   16   23   17   20   18    17
  20  |   10   12   13   14   18    5   11   11   10   13    4 |    29   27   20   31   31   23   24   26   32   14    23
  21E |   10   15    7   14   20    4   11    7   11   11    4 |    28   28   24   29   24   23   28   24   30   23    24
  22  |    9   13   13   22   17    4   16   11   10   13    4 |    24   31   22   38   33   24   28   25   30   16    24
  23  |   10   10   14   11   17    5   12   19   12   16    4 |    24   26   21   23   21   17   22   20   20   11    18
  24  |   12   18   13   13   14    6   14   14   12   11    4 |    24   23   22   23   27   18   23   19   22   17    19
  25  |   10   11   14   22   15    3   14   11   14   10    4 |    19   27   23   31   26   16   24   17   23   15    19
  26  |    8   12   11   12   10    4    7   11    7   10    3 |    21   22   20   28   22   17   22   26   24   20    21
 X27  |   11    7   12   12  ---    5   12    8    8   13    4 |    22   24   23   23  ---   19   27   20   23   16    21
  28  |    7   14   16   13   19    5   13    9    9   13    4 |    26   28   19   29   33   21   25   23   26   19    22
  29  |   10   14   14   14   16    5   13   13   16   22    5 |    29   36   29   30   27   25   33   27   32   29    27
 X30  |   10   11   11   10  ---    5   12    7    8    9    3 |    25   26   26   23  ---   21   29   19   22   18    22
  31  |    8   11   11   18   26    3   15   17    9   14    5 |    18   25   14   28   37   15   20   22   21   12    16
  32  |    8    9   11   12   16    4    9    9   10   14    3 |    19   22   19   21   19   16   19   17   21   17    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   12   15   19    5   12   13   11   15      |T   27   30   25   30   31   23   27   26   27   22    24
 WRMS |    9   13   13   13   17    5   12   12   10   16      |NE  22   26   20   26   28   18   23   21   23   17    20
 MEDI |   10   12   13   14   17    5   12   11   10   13      |MD  24   27   22   29   29   20   24   22   23   17    21

Table 3.1808.3   GPS week: 1808   Day: 3   MJD: 56903.000                            

        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    9   12   10   12    5   11    7    6   11    3 |    47   42   49   45   47   43   41   43   47   41    44
   2E |    9   13   10   12   18    7   14   13   11   15    4 |    73   72   72   71   71   69   73   72   74   70    71
   4E |   12   22   12   21   20    8   16   10    9   26    5 |   145  150  150  149  151  147  149  152  147  148   148
   5  |    9   11   12   13   18    5   15   10   10   12    4 |    22   26   19   23   26   16   23   18   19   15    18
   6E |   10   15   10   17   47    7   10   15    7   13    5 |    75   74   74   74   69   74   72   77   73   73    73
   7  |   11   13    8   13   17    5   15   12    8   14    4 |    23   26   14   26   31   16   21   22   21   16    18
   8  |   11   10   10   14   16    6   13   20    9   17    4 |    22   26   24   24   28   19   26   40   21   29    24
  X9  |   11   15   16   14  ---    9  ---   11   16  ---    6 |    29   34   33   33  ---   24  ---   30   27  ---    28
  10  |    6    9   13   12   13    4    9   10    5   13    3 |    17   22   17   23   18   16   18   19   15   17    16
  11  |    7    8   14    7   21    5   11    7    9   10    3 |    20   23   13   18   35   15   22   19   22   17    17
  12  |   12   12   10   14   17    5   16   18   12   15    4 |    23   25   16   24   28   16   22   18   21   19    17
  13  |    7   10   15   12   16    4   12    9    9   16    4 |    26   32   22   29   32   23   29   25   24   23    24
  14  |    9   10   13   15   11    4   11   14   12   16    4 |    26   29   25   32   25   23   27   30   19   22    24
  15  |    9   15   12   11   12    3   16   15   12   15    4 |    25   31   23   33   28   23   25   31   25   25    25
  16  |   11   15   13   17   21    5   17   15   11   16    5 |    19   23   16   22   27   13   21   19   19   17    15
  17  |   12   15   14   12   20    6   11   16    9   22    5 |    23   30   21   27   33   21   25   30   22   27    21
  18  |    8   14   12   15   19    5   14   18   15   14    5 |    18   24   16   24   24   14   22   22   18   12    15
  19  |   12   13   13   14   19    4   12   11   10   18    4 |    18   26   18   23   32   16   22   19   20   17    16
  20  |    7   14   14   23   18    5   14   11    9   15    4 |    26   24   19   36   30   21   24   24   26   17    22
  21E |   12    9    8   11   22    5   12   15   15   11    4 |    30   29   25   28   24   24   28   27   24   26    24
  22  |    9   15   13   17   17    5   16   14   11   13    4 |    22   26   19   34   31   22   23   27   26   16    22
  23  |    8   11   15   11   18    6   12   20   10   17    4 |    20   26   19   25   21   16   23   22   16   15    17
  24  |   10   12   11   10   10    5   13   13   11   13    4 |    23   23   24   21   25   21   23   20   20   21    20
  25  |    9   10   12    8   13    6   12   10    7   12    3 |    22   28   23   21   25   17   26   19   16   20    20
  26  |    7   11   11    9   16    3    8   11   13   12    3 |    22   26   21   27   26   21   21   28   19   21    21
 X27  |   11   10   13    7  ---    4   13    9   11   13    4 |    20   24   20   21  ---   19   28   21   22   16    20
  28  |    8   12   12   15   21    4   12   13    9   12    4 |    23   23   21   30   33   20   22   25   24   22    21
  29  |   11   14   11   14   16    6   14   10    9   20    4 |    30   37   32   34   29   28   35   29   28   32    28
 X30  |    9   13   10   10  ---    4   14    9    7   10    4 |    24   24   26   20  ---   21   28   22   22   18    22
  31  |    8   11   10   13   22    3   15   13   11   11    4 |    18   24   12   24   34   15   21   21   20   17    17
  32  |    8    8   12   12   18    6    8    8    6   17    3 |    15   19   15   18   18   11   17   16   16   18    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   12   14   19    5   13   13   10   15      |T   30   33   28   33   35   27   31   31   29   28    28
 WRMS |    9   13   12   13   17    5   13   12    9   17      |NE  22   26   20   25   27   18   23   23   21   19    20
 MEDI |    9   12   12   13   18    5   13   12   10   14      |MD  23   26   21   26   28   21   23   24   22   19    21

Table 3.1808.4   GPS week: 1808   Day: 4   MJD: 56904.000                            

        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 |   11   11   13   11   12    8   13   10   10    9    4 |    66   65   69   66   67   61   65   62   61   61    64
   2  |   11   12    7    9   19    9   14   22   11   11    4 |   113  113  111  112  115  109  111  112  111  110   111
   4E |    9   22   14   14   15    8   21   12   10   22    5 |   106  106  105  104  101  102  104  104  106   97   103
   5  |    9   13   11   13   15    5   11    9    9    9    4 |    22   26   22   27   27   19   22   18   21   16    19
   6E |   14   13   12   18   48    9   10   20    9   13    6 |   146  146  150  149  141  147  145  144  145  144   146
   7  |   10   15    9    9   17    4   15   13    9   14    4 |    21   25   14   23   33   16   20   22   23   14    17
   8  |    9   13    8   12   18    6   10   21   12   16    4 |    21   27   22   23   28   18   23   39   24   25    23
  X9  |   11   13   13   12  ---    5  ---   11   17  ---    6 |    30   29   27   31  ---   25  ---   24   35  ---    26
  10  |    7    9   13    9   14    4   10   11    8   13    3 |    16   19   17   19   17   14   14   16   21   16    14
  11  |    7    7   12    9   19    4   12    9   10    9    3 |    19   23   14   17   33   13   20   17   17   14    15
  12  |   11   16    9   14   17    6   18   14   11   15    4 |    25   28   18   21   28   18   22   20   24   21    18
  13  |    8   11   13   10   15    4   11    8    8   18    4 |    20   33   22   24   31   20   29   24   22   24    22
  14  |    7   10   13   16   10    3   12   13    9   13    4 |    24   26   21   25   25   20   24   26   22   21    21
  15  |    9   15   14   14   10    5   16   16   10   14    4 |    27   30   22   30   26   20   24   27   27   22    24
  16  |   12   17   11   14   20    4   14   16   11   15    5 |    18   24   16   23   25   13   19   19   16   18    14
  17  |   10   14   13   15   17    5   10   17   14   20    5 |    23   29   22   30   29   20   23   27   20   22    19
  18  |   10   18   12   14   20    6   15   20   10   13    5 |    20   24   17   23   26   14   20   22   19   15    15
  19  |   13   15   12   12   17    5   11   11   14   17    4 |    19   29   20   21   25   16   21   19   20   18    16
  20  |    9   13   12   11   17    5   11   12   10   12    4 |    26   28   19   29   34   22   23   27   27   13    23
  21E |   11   12    9   11   21    5   12   19    9    9    4 |    31   28   24   26   26   21   25   28   28   25    24
  22  |   12   19   13   15   19    5   17   17    9   11    5 |    23   28   17   29   31   19   23   25   24   14    20
  23  |    9   12   13   11   14    6   12   19   12   16    4 |    17   28   18   23   22   15   24   21   18   12    17
  24  |    7   15   12   11   14    5   12   12   10   13    4 |    21   25   26   23   29   23   24   20   27   23    22
  25  |    9   13   12    9   15    3   10    9   10    9    3 |    21   31   25   19   23   19   24   18   21   19    20
  26  |    9   12   12    9   14    4    8   10    9   11    3 |    22   26   21   29   25   20   23   25   24   23    22
 X27  |   13   10   12    6  ---    5   13   15   14    8    4 |    20   24   21   21  ---   20   27   23   24   15    19
  28  |    8   15   12   13   18    3   11   12   11   13    4 |    22   24   20   25   33   17   20   24   22   20    19
  29  |   11   15   11   14   18    7   15   10   15   20    5 |    26   37   28   30   29   24   31   28   30   28    26
 X30  |   10   19   13    6  ---    5   12    7    9   10    4 |    23   29   26   19  ---   20   22   21   24   18    21
  31  |    6   13   12   13   23    4   17   13   10   12    4 |    15   24   13   21   34   14   22   20   19   16    15
  32  |    7   12   11    8   16    5   10   11    8   16    3 |    14   18   16   16   21   12   16   14   16   18    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   14   12   12   19    5   13   14   10   14      |T   32   37   31   34   38   29   33   33   33   30    30
 WRMS |    9   14   12   11   16    5   13   12   10   15      |NE  21   26   20   23   27   18   22   22   22   18    19
 MEDI |    9   13   12   12   17    5   12   12   10   13      |MD  22   28   21   24   28   20   23   24   24   19    20

Table 3.1808.5   GPS week: 1808   Day: 5   MJD: 56905.000                            

        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   11   12   13   13   10   12   13   11   13    4 |    98   94   99  100   98   93   97   91   97   97    96
   2  |    7   16    7   14   19    6   17   22   11   14    5 |    36   42   32   37   44   33   31   40   36   35    33
  X3  |    3  ---  ---  ---  ---  ---  ---  ---  ---  ---    0 |   ---  ---  ---  ---  ---  ---  ---  ---  ---  ---     0
   4  |    6   19   10   15   21    7   16   12   10   23    5 |   129  132  130  136  135  129  129  129  132  128   130
   5  |    9    9   11   14   20    5   13   10   11   10    4 |    24   27   20   26   31   19   21   20   23   17    20
   6  |    9   14   10   18   52    7   14   25    9   19    6 |    60   64   60   62   66   59   63   64   62   68    61
   7  |    9   14    9   18   17    5   16   15    9   16    4 |    19   25   13   25   31   14   20   20   18   16    15
   8  |    7   11    9   12   22    7   11   21   10   15    4 |    23   29   23   24   37   19   28   42   23   31    26
  X9  |   14   13   14   14  ---    9  ---   11   11  ---    5 |    27   31   28   26  ---   24  ---   25   32  ---    25
  10  |    6   10   11   10   15    4    9   11    7   15    3 |    15   20   16   17   23   13   14   18   16   19    14
  11  |    7   10   13   11   21    4   11    9   13    6    4 |    21   23   15   21   33   15   22   16   18   14    17
  12  |   11   13   11   19   20    6   16   10   11   14    4 |    26   26   19   26   30   17   22   20   24   21    19
  13  |    8    9   13   12   18    5   11   11   10   16    4 |    20   29   19   23   29   17   25   19   18   20    19
  14  |   10   11   13   17   13    4   13   14   14   14    4 |    20   26   25   25   22   19   25   28   21   22    21
  15  |   11   14   13   15   11    4   17   18   11   14    5 |    25   29   21   26   26   19   23   28   24   18    22
  16  |    9   14   11   16   23    4   16   18   11   15    5 |    17   22   17   25   24   14   22   23   22   22    17
  17  |   10   16   12   15   17    6   13   21   13   23    5 |    25   31   20   30   31   19   23   29   23   24    21
  18  |    7   17   12   16   23    6   13   18   10   12    4 |    19   27   19   26   27   17   25   23   22   15    18
  19  |   11   13   13   14   19    5   12   11   16   19    5 |    19   32   21   22   28   16   26   20   26   21    19
  20  |   10   15   10   13   19    6   15   12   10   16    4 |    25   24   19   28   31   20   23   24   26   17    21
  21  |    9   19   10   15   55    5   10   12   12   10    6 |    29   30   25   31   56   26   32   32   28   31    27
  22  |    7   14   12   18   19    3   17   16   12   13    5 |    21   29   22   35   31   21   26   28   26   22    22
  23  |   10   10   14   13   18    7   13   21   11   16    5 |    20   25   19   21   20   15   22   17   16   12    16
  24  |    7   10   12   12   14    5   13   10   13   12    4 |    22   22   24   22   29   18   23   19   22   20    20
  25  |    9   10   12   12   17    5   14    7   15   12    4 |    21   28   24   20   23   18   25   20   21   22    20
  26  |   10   11    9   21   17    6   14   10   10   12    4 |    19   20   18   29   24   16   17   19   15   16    16
 X27  |   12   10   15    9  ---    4   17   15    9    9    4 |    19   25   21   24  ---   19   30   24   25   18    21
  28  |    8   13   12   19   18    4   11   12    9   11    4 |    20   21   16   29   32   15   20   23   21   19    18
  29  |    9   14    9   17   14    5   12    9   12   20    4 |    26   33   26   28   26   24   30   27   26   27    24
 X30  |    6   11   11   13  ---    4   14    8    6   12    3 |    22   25   27   22  ---   20   23   23   22   24    22
  31  |    7   14   11   14   23    4   17   13   13   16    4 |    15   27   17   23   33   15   21   24   21   20    17
  32  |    8   11   13   11   22    5    9   12   10   15    4 |    17   21   16   17   25   15   19   19   20   22    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   11   15   23    5   14   15   11   15      |T   29   33   28   32   37   25   30   30   29   28    27
 WRMS |    9   13   12   13   18    5   14   13   10   15      |NE  21   26   20   24   28   17   23   23   21   19    19
 MEDI |    9   13   12   14   19    5   13   12   11   14      |MD  21   27   21   26   30   19   23   23   23   21    20

Table 3.1808.6   GPS week: 1808   Day: 6   MJD: 56906.000                            

        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   10   13   12   17    5   15   14   11   11    4 |    56   52   54   55   55   51   55   49   55   53    52
   2  |   10   14   10   13   20    6   13   22    9   16    5 |    47   47   46   52   48   47   47   45   48   46    46
  X3  |    3  ---  ---  ---  ---   57  ---  ---  ---  ---    0 |   ---  ---  ---  ---  ---  ---  ---  ---  ---  ---     0
   4  |    6   13   10   12   19    5    9   10   11   19    4 |   104  107  110  108  108  109  106  105  110  106   107
   5  |    9    8   13   17   18    6   12    9    8    7    4 |    24   27   20   29   30   18   25   22   23   16    21
   6  |    8   10   10   16   51    9   13   22   11   13    6 |   116  116  117  120  117  118  115  115  119  115   116
   7  |    9   14   10   11   17    6   14   15   12   14    4 |    21   26   14   25   32   15   20   22   23   15    17
   8  |    7    8   12   11   20    5   11   22   11   14    4 |    23   27   26   25   34   21   26   40   23   26    25
  X9  |   12   12   14   15  ---    8  ---   10   14  ---    5 |    37   38   35   33  ---   31  ---   32   41  ---    33
  10  |    7   10   13   11   13    5    9   15   10   13    4 |    20   24   20   22   22   17   18   21   18   18    18
  11  |    7    7   12   12   22    5    9   12   12   10    4 |    23   25   18   22   38   16   24   20   20   20    20
  12  |   10   12   11   18   18    7   17   11   13   13    4 |    24   25   15   27   30   17   23   18   24   15    17
  13  |    7   11   14   12   17    4   12    9   13   15    4 |    29   35   24   34   37   25   32   27   26   24    27
  14  |    8   10   13   17   14    5   14   17    9   14    4 |    25   31   26   36   33   25   28   37   29   25    27
  15  |   12   14   17   15   16    5   16   16   16   13    5 |    32   33   23   38   34   25   29   35   36   24    29
  16  |   10   17   12   16   27    6   15   20   14   15    5 |    19   23   16   24   28   13   19   23   19   19    15
  17  |   10   14   15   15   16    4   12   22   12   23    5 |    29   32   23   35   37   25   28   35   32   29    26
  18  |    9   15   13   17   22    5   18   19   12   14    5 |    22   28   18   30   31   18   23   28   28   14    19
  19  |   11   14   12   15   17    4   12   12   15   17    4 |    20   30   20   27   33   19   27   20   22   19    20
  20  |   10   16   13   12   19    5   12   11   11   13    4 |    28   26   18   29   33   22   25   26   30   16    23
  21  |   10   14    8   13   22    4   16   16   16   11    4 |    25   33   26   28   37   25   25   23   34   26    25
  22  |    8   15   14   16   22    4   16   17   12   12    5 |    23   29   19   36   38   23   25   33   32   19    24
  23  |    9   12   16   14   18    7   13   20   12   15    5 |    23   27   18   27   26   18   25   24   25   14    20
  24  |    7   11   13   14   16    6   14    9   13   12    4 |    20   25   25   20   30   20   24   19   20   21    20
  25  |    8   12   14    8   19    4   10   10   11    9    4 |    22   29   26   19   25   18   23   20   19   18    20
  26  |    9   10   10   10   16    5   10   10   11   10    3 |    27   29   21   30   29   22   28   29   28   23    25
 X27  |    9   10   13   11  ---    4   13   20   13   10    4 |    24   26   23   27  ---   22   31   24   25   18    23
  28  |    8   14   13   15   17    5   11   12    8   10    4 |    29   27   23   36   38   23   27   28   28   20    25
  29  |    9   13   12   14   17    5   14   10   12   15    4 |    32   40   35   32   34   30   38   34   35   32    31
 X30  |    8   11   12    8  ---    5   12    9   10   12    4 |    26   28   28   24  ---   22   25   23   26   22    24
  31  |    6   13   14   17   26    5   18   13   11   17    5 |    17   27   14   24   35   16   25   25   20   22    18
  32  |    9   12   13   12   26    8   11   10    9   15    4 |    29   34   31   29   34   26   31   26   29   30    28
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   12   13   14   21    6   13   15   12   14      |T   32   35   30   35   39   28   33   33   33   28    30
 WRMS |    9   12   13   13   18    5   13   14   11   14      |NE  24   28   22   28   32   21   25   26   26   20    22
 MEDI |    9   12   13   14   18    5   13   13   12   13      |MD  25   29   23   29   34   22   25   26   28   21    24



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 4.1808   GPS week: 1808   MJD: 56900.0-56906.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2985 |U    6     7    16 |U   35    49   170 |U    8     7    18 |
emr | emr 2974 |     8     8    18 |U   33    53   165 |     9     8    19 |
esa | esa 2976 |     6     7    17 |U   25    43    73 |     8     8    19 |
gfz | gfz 2972 |U    6     7    16 |U   34    47   170 |U    9     7    18 |
grg | grg 2688 |     8     8    22 |U   46    66   111 |U   10     9    21 |
igr | igr 2976 |     6     8    16 |    34    47   170 |     9     7    18 |
igs | igs 2964 |     6     7    16 |    34    47   170 |     8     8    18 |
jpl | jpl 2877 |     7     8    19 |U   25    45    78 |     9     8    20 |
mit | mit 2976 |     6     7    16 |U   36    49   179 |U    8     8    17 |



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 5.1808.0   GPS week: 1808   Day: 0   MJD: 56900.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2973 |    11     8    19 |     6     6    20 |     7     6    18 |
emr | emr 2972 |    10     8    20 |     6     6    22 |     7     9    19 |
esa | esa 2976 |    10     7    19 |     6     8    25 |     7     7    17 |
gfz | gfz 2968 |    11     7    19 |     7     7    21 |     7     6    16 |
grg | grg 2688 |    14    10    31 |    11    12    70 |     9    11    19 |
igr | igr 2976 |    10     7    17 |     6     7    21 |     7     6    15 |
igs | igs 2966 |    10     7    17 |     6     7    21 |     7     8    17 |
jpl | jpl 2876 |    10     7    17 |     6     6    23 |     7     8    19 |
mit | mit 2976 |    10     6    18 |     9     8    29 |     8     8    18 |

Table 5.1808.1   GPS week: 1808   Day: 1   MJD: 56901.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     8    14 |     4     5    19 |    11     9    21 |
emr | emr 2972 |     8    11    19 |     5     4    22 |    12    10    21 |
esa | esa 2976 |     7    10    18 |     5     5    22 |    12     9    23 |
gfz | gfz 2972 |     7    10    17 |     5     6    17 |    11     9    20 |
grg | grg 2688 |     7    10    21 |    10    18    54 |    11    12    23 |
igr | igr 2976 |     7    11    18 |     4     4    20 |    12     9    22 |
igs | igs 2930 |     6    10    15 |     4     5    17 |    11     9    21 |
jpl | jpl 2875 |     9    11    21 |     5     5    21 |    12     9    22 |
mit | mit 2976 |     7    10    15 |     8     9    28 |    11    10    19 |

Table 5.1808.2   GPS week: 1808   Day: 2   MJD: 56902.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     5     8    20 |     5     9    17 |     8     6    16 |
emr | emr 2972 |     7     9    20 |     6     8    16 |     8     7    16 |
esa | esa 2976 |     6     8    16 |     5     8    21 |     9     7    17 |
gfz | gfz 2972 |     5     8    19 |     5     9    19 |     9     7    17 |
grg | grg 2688 |     6     7    24 |    11    14    51 |    11     7    22 |
igr | igr 2976 |     6     9    19 |     5     9    18 |     8     5    17 |
igs | igs 2955 |     6     8    19 |     5     9    17 |     8     6    15 |
jpl | jpl 2876 |     7    10    23 |     6    10    18 |     8     7    18 |
mit | mit 2976 |     6     8    18 |     7    14    29 |     9     7    18 |

Table 5.1808.3   GPS week: 1808   Day: 3   MJD: 56903.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     4     4    11 |     4     7    19 |    10    10    20 |
emr | emr 2974 |     6     5    13 |     5     6    21 |    10    10    18 |
esa | esa 2976 |     4     4    12 |     5     6    25 |    10    10    18 |
gfz | gfz 2972 |     5     4    11 |     4     6    22 |    11    10    20 |
grg | grg 2688 |     6     6    20 |    21    23    95 |    13    10    17 |
igr | igr 2976 |     5     5    10 |     5     6    23 |    10    10    18 |
igs | igs 2975 |     4     4    11 |     4     6    20 |    10    10    18 |
jpl | jpl 2878 |     5     5    12 |     5     7    21 |    10     9    19 |
mit | mit 2976 |     5     5    11 |     6     8    30 |     8    10    16 |

Table 5.1808.4   GPS week: 1808   Day: 4   MJD: 56904.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     5     5    12 |     7    10    28 |     6     6    15 |
emr | emr 2976 |     8     6    16 |     6     5    26 |     7     7    16 |
esa | esa 2976 |     5     6    15 |     5     7    29 |     6     5    16 |
gfz | gfz 2972 |     5     5    11 |     4     7    33 |     6     5    15 |
grg | grg 2688 |     7     7    16 |     7     6    38 |     8     9    21 |
igr | igr 2976 |     5     6    14 |     5     7    32 |     6     6    15 |
igs | igs 2976 |     5     5    13 |     5     7    28 |     6     6    15 |
jpl | jpl 2880 |     7     6    17 |     5     6    26 |     7     6    18 |
mit | mit 2976 |     5     5    12 |     6    10    47 |     6     7    15 |

Table 5.1808.5   GPS week: 1808   Day: 5   MJD: 56905.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6    11    21 |     6     5    20 |     7     8    17 |
emr | emr 2976 |     8    12    24 |     6     4    23 |     8     9    19 |
esa | esa 2976 |     7    10    22 |     6     4    22 |     7     8    18 |
gfz | gfz 2976 |     6    10    21 |     6     6    21 |     7     8    15 |
grg | grg 2688 |     7    12    23 |     9     8    34 |     9    10    25 |
igr | igr 2976 |     6    11    23 |     6     5    20 |     7     8    15 |
igs | igs 2976 |     6    11    22 |     5     4    22 |     7     8    17 |
jpl | jpl 2880 |     8    12    25 |     6     5    21 |     8     8    19 |
mit | mit 2976 |     7    11    23 |     6     6    27 |     8     9    16 |

Table 5.1808.6   GPS week: 1808   Day: 6   MJD: 56906.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3042 |     4     6    13 |   212   302  1065 |     9     7    20 |
emr | emr 2976 |     7     9    13 |   199   339  1023 |     9     7    23 |
esa | esa 2976 |     5     7    13 |   144   261   368 |     9     8    22 |
gfz | gfz 2976 |     5     8    13 |   208   291  1057 |     9     7    22 |
grg | grg 2688 |     8     8    16 |   253   381   439 |    11     7    22 |
igr | igr 2976 |     5     8    13 |   207   293  1057 |     9     7    22 |
igs | igs 2976 |     5     8    12 |   209   294  1066 |     9     7    21 |
jpl | jpl 2880 |     6     9    17 |   144   276   418 |     9     6    23 |
mit | mit 2976 |     6     7    13 |   208   290  1068 |     8     7    19 |


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 6.1808   GPS week: 1808   MJD: 56900.500-56906.500

                                                         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 |     -60     -15      54    -101     -2 |      28     32
            |      24      17      61      98      6 |       3
emr   uuuuu |      51      -3      10     151    -11 |      68     72
            |      17      20      93      67     12 |       1
esa   uuuuu |      18     -11      18      94      5 |      22     26
            |      18      24      68      38      2 |       2
gfz   uuuuu |       1     -20      72    -215      4 |      19     25
            |      26      23      82     108      6 |       3
grg   uuuuu |      -4       0    -102    -157     -7 |      60     63
            |      20      16      94     122     10 |       2
igr   xxxxx |      12       3     -12     103      0 |       5     13
            |      17      15      44      55      4 |       2
irf   xxxxx |      28       0     -31     171     -5 |       6     18
            |       9       8      42      82      2 |       3
jpl   uuuuu |       6      15      97     227     -7 |      37     41
            |      15      22      84      59      4 |       6
mit   uuuuu |      27      25    -181    -146     -7 |      31     36
            |      25      18     117     100      4 |       2
ngs   uuuuu |     -25      14     -33     -29      1 |      14     22
            |      36      66     108     174      8 |       3
sio   uuuux |      36       7     -26     194     -5 |      49     51
            |      20      15      42      86      5 |       3


Table 7.1808.0   GPS week: 1808   Day: 0   MJD: 56900.500

                                                         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     -39      95    -135      8 |      32     36
emr   uuuuu |      73      20    -123      87      6 |      69     74
esa   uuuuu |       9     -34     -36      35      3 |      24     28
gfz   uuuuu |      -4     -52     146    -305      2 |      23     28
grg   uuuuu |      -6      -8      45    -297      8 |      64     66
igr   xxxxx |       2     -17     -21      36      8 |       8     17
irf   xxxxx |      27     -11      15     105     -3 |      11     19
jpl   uuuuu |      18      -6      93     222     -6 |      46     52
mit   uuuuu |      19      -4     -55    -118     -1 |      35     39
ngs   uuuuu |     -49     131    -177     293     -8 |      19     25
sio   uuuux |      12      -1      21     127      3 |      55     57

Table 7.1808.1   GPS week: 1808   Day: 1   MJD: 56901.500

                                                         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 |     -38     -20      40    -153     -8 |      30     35
emr   uuuuu |      26      10     -53      84    -10 |      68     73
esa   uuuuu |      46     -13      22     134      5 |      22     27
gfz   uuuuu |     -10     -29     132    -148     -3 |      20     26
grg   uuuuu |      -4     -24     -75    -114      5 |      62     65
igr   xxxxx |      20     -16     -24     114      3 |       7     17
irf   xxxxx |      18      -7      -7     211     -5 |       8     19
jpl   uuuuu |       5      -9     110     289     -6 |      44     50
mit   uuuuu |       2      12     -99    -150     -4 |      32     37
ngs   uuuuu |     -24      73     -94     -68      5 |      15     23
sio   uuuux |      29     -11      -3     239     -5 |      52     54

Table 7.1808.2   GPS week: 1808   Day: 2   MJD: 56902.500

                                                         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 |     -57       4      47      55     -5 |      25     30
emr   uuuuu |      44       6     -25     177      0 |      65     70
esa   uuuuu |      36     -11      70     142      4 |      18     23
gfz   uuuuu |      25      -3      49     -59     10 |      15     22
grg   uuuuu |      -5      -5    -128    -250     -3 |      58     61
igr   xxxxx |     -12       1     -15      93     -5 |       2     13
irf   xxxxx |      20       3       6      75     -7 |       4     18
jpl   uuuuu |      11      -4      34     140     -2 |      35     38
mit   uuuuu |      15      31     -65    -194     -9 |      29     35
ngs   uuuuu |     -44     -15     -45    -180     -6 |      11     21
sio   uuuux |      26      -7      10      91     -7 |      47     49

Table 7.1808.3   GPS week: 1808   Day: 3   MJD: 56903.500

                                                         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 |     -46     -13      42    -123     -8 |      27     31
emr   uuuuu |      47      -8      14      84    -28 |      68     73
esa   uuuuu |       3     -13     121     101      4 |      20     24
gfz   uuuuu |      27       5      74    -139     12 |      18     24
grg   uuuuu |     -18      17    -171    -111    -14 |      61     63
igr   xxxxx |      38      16      37     146      3 |       4     12
irf   xxxxx |      40      13     -34     243     -6 |       6     18
jpl   uuuuu |      14      43      64     226     -4 |      36     39
mit   uuuuu |      52      50    -186    -101     -8 |      31     35
ngs   uuuuu |     -78     -43     -21     -90      0 |      12     21
sio   uuuux |      66       4     -32     269    -11 |      48     50

Table 7.1808.4   GPS week: 1808   Day: 4   MJD: 56904.500

                                                         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 |    -110      11     -66    -137     -5 |      27     31
emr   uuuuu |      73     -43      76     228    -11 |      69     73
esa   uuuuu |      -2     -41      44     101      4 |      21     25
gfz   uuuuu |     -26     -47     155    -283     -3 |      20     25
grg   uuuuu |     -35      11    -174    -266    -15 |      61     63
igr   xxxxx |       0       6      20     108      0 |       4     12
irf   xxxxx |      31       0     -97     184     -7 |       5     18
jpl   uuuuu |      22      20     131     216    -14 |      35     38
mit   uuuuu |      51      43    -367    -251    -12 |      31     35
ngs   uuuuu |      29      25     152     120     13 |      12     21
sio   uuuux |      50      23     -94     209    -10 |      47     49

Table 7.1808.5   GPS week: 1808   Day: 5   MJD: 56905.500

                                                         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 |     -70     -24     103    -225     -1 |      26     30
emr   uuuuu |      48      -3      16     233    -21 |      67     71
esa   uuuuu |       6      17     -14      65     10 |      21     24
gfz   uuuuu |     -33      -6     -72    -367      8 |      19     24
grg   uuuuu |      15      18    -207      49    -11 |      57     59
igr   xxxxx |      19       6      15     189     -4 |       3     11
irf   xxxxx |      37       4     -75     289     -6 |       3     16
jpl   uuuuu |     -15      38     255     315     -3 |      32     34
mit   uuuuu |      54      24    -283      38     -9 |      28     33
ngs   uuuuu |       6     -41      52    -185     -5 |      12     21
sio   uuuux |      52      11     -68     313     -8 |      45     48

Table 7.1808.6   GPS week: 1808   Day: 6   MJD: 56906.500

                                                         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 |     -49     -24     115      11      2 |      28     32
emr   uuuuu |      43      -1     167     163    -14 |      68     72
esa   uuuuu |      26      22     -80      81      5 |      25     28
gfz   uuuuu |      27      -6      16    -204      1 |      22     27
grg   uuuuu |      26      -6      -4    -108    -17 |      59     60
igr   xxxxx |      18      24     -98      36     -2 |       5     12
irf   xxxxx |      21       1     -25      91     -3 |       5     17
jpl   uuuuu |     -16      25      -7     183    -11 |      34     37
mit   uuuuu |      -3      18    -212    -247     -5 |      30     34
ngs   uuuuu |     -18     -29     -99     -89      5 |      14     22
sio   uuuux |      20      28     -17     109      0 |      47     49



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