[IGSREPORT-23052] Wk 1810 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri Oct 3 12:23:15 PDT 2014


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1810   (Sep 14, 2014 - Sep 20, 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:

igs1810[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1810[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1810[0-6].cls  IGS GPS clock combination summary report.
igs18107.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs18107.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   | 3 HOB2 HOB2
                0  |  ESA   | ALRT ALRT
                0  |  GFZ   | 1 6 30 1 6 30
                0  |  GRG   | 6 6 KOUC USNO KOUC MONP USNO
                0  |  MIT   | 1 3 12 18 26 1 3 9 10 12 14 18 26 MDVJ MONP
                1  |  COD   | ALRT
                1  |  EMR   | 21 TSKB TSKB
                1  |  ESA   | 21 ALRT
                1  |  GFZ   | 1 6 30 1 6 30 MCM4
                1  |  GRG   | 6 6 ZIMM MAL2 ONSA ZIMM
                1  |  JPL   | KARR
                1  |  MIT   | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                1  |  MIT   | 21 22 23 24 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7
                1  |  MIT   | 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
                1  |  MIT   | 25 26 27 28 29 30 31 32
                2  |  COD   | BRAZ BRAZ
                2  |  EMR   | YELL
                2  |  ESA   | HOB2 UNSA
                2  |  GFZ   | 1 6 21 30 1 6 21 30 BRAZ YELL HYDE
                2  |  GRG   | 6 21 25 6 21 25 BOR1 HOB2 IRKJ MAL2 NKLG BOR1 IRKJ
                2  |  GRG   | MAL2 RBAY
                2  |  JPL   | 21 IRKJ
                2  |  MIT   | 3 19 21 27 3 19 21 24 27 HOB2 TLSE MDVJ TLSE
                3  |  COD   | FAA1 HOB2
                3  |  EMR   | 3
                3  |  ESA   | BRAZ PIMO BRAZ PIMO
                3  |  GFZ   | 1 2 6 9 30 1 3 6 30 BRAZ DRAG HOB2 XMIS BRAZ DGAR
                3  |  GFZ   | DRAG HOB2
                3  |  GRG   | 6 6 GRAZ HYDE TLSE GRAZ HYDE TLSE
                3  |  MIT   | 3 4 9 11 1 3 4 5 9 11 19 TLSE MDVJ TLSE
                4  |  COD   | 3
                4  |  EMR   | TLSE
                4  |  ESA   | PIMO UNSA
                4  |  GFZ   | 1 2 6 9 30 1 6 9 30 FAA1 NOVM TLSE NOVM
                4  |  GRG   | 6 9 6 9 FAA1 HOB2 HYDE IRKJ KELY MAL2 SOFI TLSE FAA1
                4  |  GRG   | HOB2 HYDE IRKJ KELY SOFI TLSE
                4  |  JPL   | IRKJ
                4  |  MIT   | 1 3 4 16 19 22 26 27 1 3 4 7 16 19 22 26 27 HOB2
                4  |  MIT   | HOB2 MDVJ MONP
                5  |  COD   | FLIN
                5  |  ESA   | DUBO IRKJ DUBO IRKJ
                5  |  GFZ   | 1 2 6 9 30 1 6 30 FLIN YELL FLIN SCH2
                5  |  GRG   | 6 9 6 9 ALRT GRAZ IRKJ MAL2 ALRT GRAZ IRKJ MAL2
                5  |  JPL   | IRKJ
                5  |  MIT   | 31 FLIN MONP PDEL
                6  |  COD   | FAA1 FAA1 TSKB
                6  |  ESA   | UNSA
                6  |  GFZ   | 1 2 6 9 30 1 6 9 30 WSRT XMIS XMIS
                6  |  GRG   | 6 9 6 9 GRAZ HYDE MAL2 BOGT DRAG FAA1 GRAZ HYDE MAL2
                6  |  MIT   | 1 3 5 6 11 12 18 22 1 3 5 6 11 12 15 18 22 HYDE HYDE
                6  |  MIT   | KOUR

 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 table lists all maneuvered satellites for this week. The
    solutions from COD and ESA, which modeled the maneuver, are used that day for
    combination, if available. An associated accuracy code of 0 (unknown) is given
    if only one AC is left (no redundancy). For the long arc evaluation the arc is
    split into two parts at the given maneuver epoch.
    
               PRN |    Date    | Ref. NANU
               ----+------------+----------
               G13 | 2014_09_19 | 2014072 

 7. The following orbit solutions were excluded from the combination because they
    were biasing the weighted average (generally indicated by long arc RMS). They
    were still used for statistics computation.
    
               Day | Centre | PRN list
               ----+--------+---------------
                2  |  GRG   |  25
                2  |  JPL   |  25

 8. 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 G25 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |

 9. 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.

10. 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 |   -1.4   -1.2    -.8     -76     36    -37     .13
       EMR  |   0 |    3.5    2.6    1.7     -14     13    -30     .15
       ESA  |   0 |     .0     .4   -1.7       1     -4     33     .01
       GFZ  |   0 |     .4   -1.3   -1.0     -52    -41    -16     .39
       GRG  |   0 |   10.2   -4.5   -7.7     -27     31    -33     .67
       JPL  |   0 |     .4    8.0    4.0     -12    -38    -17     .57
       MIT  |   0 |    3.3     .8   -1.6      -2      8    -41     .35
       NGS  |   0 |   -1.4   -2.6    9.0     -21     -8    -14     .50
       SIO  |   0 |    6.6    4.0   -5.1     -26     17    -13     .18

       COD  |   1 |    -.7    -.6   -1.0     -47     38    -23     .27
       EMR  |   1 |    9.0    -.5    2.0     -14      7    -36     .28
       ESA  |   1 |     .1    1.2   -1.7       2      0     38     .02
       GFZ  |   1 |     .1    -.3   -1.9     -51    -61    -29     .40
       GRG  |   1 |   17.2   -2.9  -24.3     -24     29     -6    1.03
       JPL  |   1 |    9.8    6.0    9.5     -43     19    -15     .18
       MIT  |   1 |    4.2    2.1    2.3       3      9    -33     .45
       NGS  |   1 |   10.3   -1.5   14.5     -34    -68     67     .62
       SIO  |   1 |    6.4    1.9   -7.9     -22     13    -10     .42

       COD  |   2 |    -.5   -1.0    -.1     -25     37    -22     .36
       EMR  |   2 |   -1.3    2.4    -.5      -4     13    -38     .35
       ESA  |   2 |    -.1     .7   -1.5      -7     -6     38     .0 
       GFZ  |   2 |     .4     .0   -2.4     -52    -52    -17     .31
       GRG  |   2 |    9.7   -7.6  -15.8     -15     53    -39    1.12
       JPL  |   2 |   -2.6    2.8    8.5     -67     12      5     .35
       MIT  |   2 |   -1.9     .7   -1.9      -4     13    -43     .38
       NGS  |   2 |    4.6   -5.8    2.8      -2    -19     16     .63
       SIO  |   2 |    2.5    1.4   -6.9     -13     20     -4     .34

       COD  |   3 |   -1.0    -.8     .0     -47     35    -25     .20
       EMR  |   3 |    3.7    -.4    1.2     -13     -5    -30     .45
       ESA  |   3 |     .3     .6   -1.3      -7      1     34    -.06
       GFZ  |   3 |     .0    -.6   -2.7     -24    -45    -17     .20
       GRG  |   3 |   12.6   -4.0  -14.3     -13     32    -12     .84
       JPL  |   3 |     .8    8.2   12.8     -74      7    -22    -.37
       MIT  |   3 |     .7    2.2    -.8      -3     16    -37     .30
       NGS  |   3 |    1.9    1.1   -4.3      50     -2     23     .55
       SIO  |   3 |    4.1    2.3   -3.6       0     21      2     .38

       COD  |   4 |    -.7   -1.1    -.6     -66     32    -11     .04
       EMR  |   4 |    1.7     .8    1.9     -17     -1    -20     .17
       ESA  |   4 |     .2     .5   -1.6       5     -6     51    -.29
       GFZ  |   4 |     .4    -.8   -2.1     -43    -47    -17     .04
       GRG  |   4 |   15.4   -1.1   -5.9     -17     32     -9     .63
       JPL  |   4 |    3.4    9.4   10.7     -46     -9    -13     .19
       MIT  |   4 |     .1    4.1   -2.2      -1      5    -28     .16
       NGS  |   4 |   -2.8    -.9    9.2     -13      1    -15     .65
       SIO  |   4 |    8.3    4.1   -7.8       2      8      7    -.02

       COD  |   5 |   -1.3    -.7    -.8     -56     45    -18     .10
       EMR  |   5 |   11.6    2.5    6.1     -18     14    -40     .17
       ESA  |   5 |     .9     .7   -1.8       4     -2     43    -.16
       GFZ  |   5 |     .1    -.3   -2.1     -27    -47    -22    -.07
       GRG  |   5 |   16.5    2.9  -15.8     -18     23     -8     .73
       JPL  |   5 |    2.6   14.5    7.5     -66    -41      8     .41
       MIT  |   5 |    1.0    3.3   -4.1       2     10    -36     .25
       NGS  |   5 |    8.0    -.1    3.7      19    -34     38     .36
       SIO  |   5 |    7.6    4.0   -3.0      -8     13    -11    -.0 

       COD  |   6 |    -.8   -1.1    -.9     -45     20      2     .27
       EMR  |   6 |    -.8     .3    4.3     -19      1    -48     .40
       ESA  |   6 |     .4     .4   -2.2       1      3     44     .08
       GFZ  |   6 |    -.2    -.3   -2.2     -38    -66    -19     .13
       GRG  |   6 |    8.5   -1.3  -12.3     -22     39    -16    1.21
       JPL  |   6 |   -3.7   11.8    4.4     -46     73    -11     .03
       MIT  |   6 |     .3    2.3   -6.4      -2     15    -39     .43
       NGS  |   6 |     .0   -1.8   10.9     -11    -17     -2     .44
       SIO  |   6 |    4.3    1.9   -3.9       7     15      5     .31


11. 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.

12. 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 1.1810.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1810.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 2.1810.[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 3.1810.[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 5.1810.0-6). 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 1810 summary.                       (Sep 14, 2014 - Sep 20, 2014)

Table 1.1810.a   GPS week: 1810   MJD: 56914.000-56920.000

         Mean and standard deviations of transformation parameters to the 
         combined IGS orbit.
         WRMS - orbit RMS weighted by the SP3 header accuracy codes.
         STA  - Mean number of stations in the daily solutions.
   
CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  255|    1     0     2    15    22    -2   .10    8    8 |    -916    -400     17    107
        |    0     0     2    10    15     7   .02           |     568     649
emr   80|    0    -1     2    17   -14    29   .23   13   13 |    2939    -191     14    157
        |    1     1     1    25    17    17   .02           |     750     749
esa  150|    0     0     0     3   -16    12  -.23   11   12 |    -591    -587     10    166
        |    0     0     1    18    10    11   .03           |    1810    2621
gfz  196|   -1     2     5    12    -6     3   .18   13   13 |      -5    -400     16    150
        |    0     0     1     9    10    16   .03           |     288     544
grg  177|    3     0   -10   -11    14     8   .34   21   19 |    -199    -150     18    139
        |    1     1     3    29    24    17   .04           |     119     351
igr  n/a|    0     0     1   -13     3     1  -.13    5    5 |    5083    -244     17    102
        |    0     0     1    15    11    12   .02           |     582     806
jpl   80|   -2    -1    -2    -9     8    -5   .07   13   13 |    2880    -138     16    149
        |    2     1     1    20    21    18   .02           |     710     973
mit  350|    0    -2     0   -26   -28    -4  -.08   14   13 |     -91    -260     36    256
        |    0     0     1    22    36    25   .02           |    1121    1286
ngs  232|    0     0     0   -22    22   -28   .01   11   10 |    -959    -259   1407   2951
        |    1     0     3    54    39    26   .06           |     367     543
sio  482|   -1     0    -2    -1   -27     1  -.66   14   15 |     ---     ---    ---    ---
        |    0     0     0    32    27    18   .03           |     ---     ---


Table 1.1810.b   GPS week : 1810   MJD: 56914.000-56920.000   

         Satellite position sigmas for the combined orbits
         (coded in the IGS SP3 orbit files).
         "E" flags eclipsing satellites.
         Units: mm.

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    4    4    4    4    4    4    4 |
   2  |    5    5    5    5    5    5    5 |
   3  |   14   13   12   10   17   26   17 |
   4  |    4    4    4    4    4    4    4 |
   5  |    4    5    5    4    4    4    5 |
   6  |    6    6    6    7    6    5    5 |
   7  |    4    4    4    4    4    4    4 |
   8  |    4    4    4    4    4    5    4 |
   9  |    5    6    6    6    7    6    7 |
  10  |    4    4    4    4    4    4    4 |
  11  |    4    4    4    4    4    4    4 |
  12  |    5    5    5    5    5    5    5 |
  13  |    4    4    4    4    4    0    4 |
  14  |    4    4    4    4    4    4    4 |
  15  |    5    5    5    6    5    5    5 |
  16  |    6    5    6    5    6    6    6 |
  17  |    5    5    5    5    5    5    5 |
  18  |    5    5    5    5    5    5    5 |
  19  |    5    5    5    5    5    4    5 |
  20  |    4    4    4    4    4    4    4 |
  21  |    4    4    5    4    4    5    5 |
  22  |    4    4    4    5    4    4    4 |
  23  |    5    5    5    5    5    5    5 |
  24  |    4    4    5    5    4    4    4 |
  25  |    4    4   17    4    4    4    4 |
  26  |    4    4    4    4    4    4    4 |
  27  |    5    4    5    4    4    4    4 |
  28  |    4    4    4    4    4    4    4 |
  29  |    5    5    5    5    5    5    5 |
  30  |    4    4    4    4    4    4    5 |
  31  |    5    5    5    5    5    5    5 |
  32  |    4    4    4    4    4    5    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 2.1810.0   GPS week: 1810   Day: 0   MJD: 56914.000                            

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  256|    1     1     2    -2    44   -10   .09    8    8 |    -837      60     15    104
emr   80|    1     0     0    -8   -10    25   .20   13   13 |    1572     551     14    155
esa  150|    0     0    -1   -22    -5    31  -.26   12   12 |   -1417    2504     10    170
gfz  195|   -2     2     6    14     5    11   .19   13   12 |     -36     179     16    143
grg  177|    3     0    -9   -26    15     9   .34   20   17 |     -22       3     18    151
igr  n/a|    0     0     1     1    -7    -3  -.15    5    5 |    4102     565     16    116
jpl   80|   -1    -3    -1    20   -25    23   .10   12   12 |    1673     965     18    229
mit  350|    0    -1     0   -31   -63    28  -.04   14   12 |    -219      70     29    257
ngs  235|    1     0     0    44    22   -71  -.02   11    9 |   -1025     215   1834   3672
sio  481|   -1     0    -1   -20   -43     5  -.67   15   15 |     ---     ---    ---    ---

Table 2.1810.1   GPS week: 1810   Day: 1   MJD: 56915.000                            

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  256|    1     0     2    18    14    -5   .10    8    8 |   -1196    -219     22    127
emr   80|    2     0     3    66     3    34   .27   13   13 |    2325     660     17    179
esa  150|    0     0    -1   -20    -4    10  -.24   12   12 |   -2161    -271     10    151
gfz  198|    0     2     4    13    -1    -9   .16   13   13 |     136    -138     17    142
grg  177|    3     0   -15   -35    -8    28   .34   20   18 |    -208     123     18    130
igr  n/a|   -1     0     0   -22     5    -7  -.13    5    5 |    4744     533     19     91
jpl   80|   -3    -1    -3    -9     3   -25   .11   14   14 |    2458     -62     17    164
mit  350|    0    -2    -1   -54     3    16  -.06   12   12 |    -518     295     85    480
ngs  235|    1     0     6    43   -12   -26  -.04   11   11 |    -756    -226   1361   3241
sio  480|   -1     0    -2   -55   -15    12  -.65   14   15 |     ---     ---    ---    ---

Table 2.1810.2   GPS week: 1810   Day: 2   MJD: 56916.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  257|    0     0     4     8    29    -2   .13    8    8 |   -1065    -548     20    118
emr   80|    1    -1     2    14    -8    34   .25   12   12 |    2953    -192     16    175
esa  150|    0     0     0    -1   -11    22  -.24   12   12 |    -335    -314     10    144
gfz  198|   -1     2     6    17    -5    10   .16   15   14 |    -185    -591     17    154
grg  177|    3     0   -13   -53   -11    14   .29   21   19 |    -277    -292     20    150
igr  n/a|    0     0     2   -26     3     5  -.16    6    6 |    5077      63     18     93
jpl   80|    1     0     0   -11    15   -10   .08   12   12 |    2504     292     18    123
mit  350|    0    -2     0   -11   -63     9  -.09   14   13 |    -147    -876     33    262
ngs  236|    1    -1    -3   -16    56   -54  -.07   12   11 |   -1490     481   1169   2392
sio  485|   -2     0    -3     9   -70    18  -.66   15   15 |     ---     ---    ---    ---

Table 2.1810.3   GPS week: 1810   Day: 3   MJD: 56917.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  255|    0     0     1    21    -1    -9   .09    8    8 |   -1865     557     18     99
emr   80|    1    -1     4     4   -36    14   .22   12   12 |    3182     336     14    140
esa  150|    2     0     0    25   -33     0  -.24   11   11 |   -1269    1569     11    167
gfz  197|    0     2     5     5   -17    10   .21   13   14 |    -456      98     17    160
grg  178|    2     0    -8    16    31    21   .35   21   19 |    -392     410     18    128
igr  n/a|    0     0     3   -36   -12    28  -.11    5    5 |    5616     373     16    100
jpl   80|   -2    -1    -1   -20     0   -18   .06   12   12 |    3221     943     17    174
mit  350|    0    -2     1    -7    23    -3  -.10   13   12 |   -1741    1603     25    189
ngs  232|    0     0    -3   -48    29     1  -.00   10    9 |    -668    -537   1103   2812
sio  482|   -1    -1    -1    20     8     8  -.62   16   16 |     ---     ---    ---    ---

Table 2.1810.4   GPS week: 1810   Day: 4   MJD: 56918.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  255|    0     0     0    28    16     3   .07    8    8 |    -600   -1187     16    101
emr   80|    0    -1     3    19   -36    48   .20   13   13 |    3501    -803     13    149
esa  150|    0     1     1    12   -20     7  -.23   11   11 |   -2271    -436     10    143
gfz  194|    0     1     5    -4   -12    -9   .20   14   14 |    -137   -1153     18    139
grg  178|    5     2   -11    -3    20   -27   .39   20   18 |    -192    -497     18    145
igr  n/a|    0     0     2    -6    16    -8  -.13    5    5 |    5737   -1223     18    110
jpl   80|   -2    -1    -2   -40    18    -7   .06   13   13 |    3812   -1518     16    121
mit  350|    0    -1     0   -36   -40   -14  -.10   13   12 |     -41    -453     31    207
ngs  231|    0     0     0   -24    81   -21   .07   12   10 |    -617   -1192   1851   3045
sio  486|    0     0    -2    11   -45   -20  -.64   14   13 |     ---     ---    ---    ---

Table 2.1810.5   GPS week: 1810   Day: 5   MJD: 56919.000                            

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  254|    2     0     5    19    33    12   .11    8    8 |    -844    -230     16    111
emr   80|    0    -4     3    26   -20    50   .22   14   14 |    3721    -557     15    152
esa  150|    2     1    -1    16   -26    -1  -.18   11   11 |    2895   -5690     11    235
gfz  196|   -1     2     4    11   -20   -19   .21   14   13 |     236    -128     18    188
grg  176|    2     2    -6    -7    -2    11   .38   22   20 |     -96    -216     18    143
igr  n/a|    0     0     0    -8    17    -5  -.09    5    5 |    5496    -880     18    108
jpl   80|   -6    -2    -4    11     1   -13   .04   14   14 |    3285    -379     17    124
mit  350|    0    -1    -1   -48     0   -20  -.08   13   12 |     -31     139     23    179
ngs  230|    0     0    -3   -41    13   -20   .04   10    9 |    -725    -440   1225   2503
sio  481|    0     1    -1   -19    -8   -29  -.69   14   14 |     ---     ---    ---    ---

Table 2.1810.6   GPS week: 1810   Day: 6   MJD: 56920.000                            

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|    2     1     0    13    19    -3   .13    9    9 |      -8   -1236     15     95
emr   80|   -1    -3     3    -3     9     2   .23   13   13 |    3325   -1337     14    149
esa  150|    0     0     0    15   -12    16  -.25   11   11 |     421   -1471     10    153
gfz  195|    0     3     4    26     5    27   .14   13   12 |     406   -1070     14    128
grg  178|    4     0    -8    30    56     6   .32   22   20 |    -208    -581     17    131
igr  n/a|    0     0     0     3     0     2  -.13    5    5 |    4810   -1143     16     97
jpl   80|   -2    -1     0   -12    43    15   .07   13   13 |    3207   -1208     15    108
mit  350|    1    -1    -1     4   -56   -47  -.07   15   15 |    2058   -2599     30    224
ngs  228|   -3     0     2  -113   -34    -3   .10   12   10 |   -1436    -114   1312   2998
sio  482|    0     0    -3    41   -15    13  -.70   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 3.1810.0   GPS week: 1810   Day: 0   MJD: 56914.000                            

        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    9   12    9   16    6   11   12    9   12    3 |    19   19   23   22   25   16   22   16   20   14    17
   2  |    8   13   12   17   19    7   13   12    8   16    4 |    16   20   15   21   22   11   17   17   16   21    11
  X3  |   36   22   22   24  ---   12  ---   21   41  ---   13 |    45   38   21   38  ---   42  ---   41   41  ---    34
   4  |    6   10   11   11   15    7   10   12    9   19    4 |    16   21   17   19   22   13   20   15   20   20    16
   5  |    8   12   10   11   18    4   13   11   11   15    4 |    20   20   13   24   27   14   18   21   20   15    16
   6  |    8    8   10   14   55    7   11   11    9   12    5 |    43   46   48   42   56   41   45   41   39   47    43
   7  |    6   12   10    9   16    4   12    9    9   14    3 |    23   24   16   27   30   16   21   20   21   14    19
   8  |    7    9   11   11   15    4   13   18    7   20    4 |    17   19   19   18   19   15   23   22   17   24    17
  X9  |   10   10   11   11  ---    7  ---   17    7  ---    5 |    51   53   53   53  ---   48  ---   52   53  ---    51
  10  |    8   11   13   11   14    5   11   10   12   14    4 |    44   49   48   44   50   47   48   53   47   51    47
  11  |    7    8   15    8   25    6   10   13    8   11    4 |    33   37   30   32   55   30   37   34   31   31    33
  12  |    7   16   12   16   18    4   17   18   10   16    5 |    20   23   16   25   27   13   22   21   19   15    15
  13  |    7   11   13   11   15    4   11   11   10   14    4 |    23   28   19   26   27   19   27   18   21   19    21
  14  |    5    9   13   13   12    3   11   16    9   19    4 |    27   30   25   32   25   25   28   30   25   23    25
  15  |   11   13   15   15   12    4   16   13   18   15    5 |    35   34   34   36   30   28   34   32   30   31    30
  16  |    9   15   12   17   26    7   13   22   14   15    5 |    17   23   16   21   26   12   19   19   17   17    13
  17  |    8   13   14   13   13    6   14   13   12   18    4 |    24   28   22   30   36   22   27   30   24   22    23
  18  |    9   14   11   16   17    6   13   17   12   15    4 |    17   21   17   18   24   12   20   16   20   15    13
  19  |   11   13   14   14   16    6   10   12    9   17    4 |    20   29   21   25   34   18   26   22   23   20    21
  20  |    9   16   10   12   16    6   13    9    8   14    4 |    20   20   13   21   27   12   17   17   18   11    14
  21  |    7   13   10   10   24    3   10   15   12   13    4 |    21   26   16   20   32   15   21   20   20   15    17
  22  |    6   11   10   16   16    4   10   14   10   13    4 |    14   21   14   22   26   13   19   16   17   11    13
  23  |    9   13   14   12   15    5   14   12   10   16    4 |    22   27   19   26   21   16   25   21   18   15    18
  24  |    6   11   13   11   12    4   15   10   15   11    4 |    20   25   26   21   23   19   27   19   24   19    21
  25  |    5   17   14   14   16    4   15   13    7    8    4 |  9999  719 9999 9999  993 9999 9999 9999 9999 9999  9999
  26  |    8   11   11    8   12    4    8   12   14    9    3 |    23   23   19   26   22   20   21   25   19   22    20
 X27  |   10   12   14   11  ---    3   12   10   13   13    4 |    31   33   30   33  ---   31   40   34   37   29    32
  28  |    7   14   13   14   19    5   10    9    6   10    4 |    18   19   15   28   32   14   19   22   18   17    16
  29  |    9   18   14   12   17    4   13   15   13   16    5 |    30   39   32   31   35   28   37   31   30   29    29
 X30  |    6   10   11    9  ---    6   13    9    7   11    3 |    24   27   27   23  ---   23   29   22   25   21    24
  31  |    6   14   12   16   22    5   13   19   13   18    5 |    18   25   14   23   33   15   23   26   21   16    18
  32  |    6   11   10   14   16    6   11   13    9   13    4 |    37   42   38   41   36   35   41   43   38   39    38
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13   12   13   20    5   12   14   11   15      |T   25   50   23   28   64   22   26   26   25   22    23
 WRMS |    8   13   12   12   17    5   12   12    9   15      |NE  24   50   23   27   64   21   26   25   24   22    23
 MEDI |    7   12   12   12   16    5   12   12   10   14      |MD  22   26   19   26   27   18   23   22   21   20    20

Table 3.1810.1   GPS week: 1810   Day: 1   MJD: 56915.000                            

        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   12    8   14    4   13    8   13   12    3 |    19   17   22   22   23   14   21   18   20   17    17
   2  |    9   14   12   18   18    6   16   11   12   18    5 |    19   22   18   25   20   13   19   21   18   26    15
  X3  |   29   33   19   18  ---   26  ---   18   41  ---   12 |    47   40   20   42  ---   46  ---   38   49  ---    35
   4  |    7   10   10   11   17    6    9   10   10   20    4 |    17   20   19   18   20   14   19   17   24   23    17
   5  |    9   14   10   12   20    5   19   13   11   15    4 |    19   24   15   27   29   15   22   27   16   22    18
   6  |    8    9    9   14   53    6   12   11   11   12    5 |    31   34   35   31   40   30   35   32   32   34    31
   7  |    8   15    9   10   18    4   12   10   11   16    4 |    24   25   16   26   31   16   23   22   22   19    19
   8  |    7   11   10   11   16    4   11   11    9   20    4 |    20   23   20   22   22   18   25   21   20   27    20
  X9  |   11   10   13   14  ---    6  ---   13   13  ---    5 |    42   41   40   39  ---   38  ---   41   36  ---    37
  10  |    8   10   12   13   12    5   12    9   10   11    3 |    56   55   53   56   55   53   56   55   54   56    54
  11  |    8    8   15    8   23    6   12    8   14   12    4 |    24   26   24   25   42   23   30   24   24   25    23
  12  |    9   15   10   18   18    7   18   16   12   14    5 |    23   26   16   30   27   16   24   24   25   18    19
  13  |    6   11   13   11   17    4   12    8   12   12    3 |    20   25   17   19   25   16   25   15   18   15    18
  14  |    7   10   13   16   15    5   12   13    9   13    4 |    17   27   22   22   20   18   20   22   26   18    19
  15  |   10   14   15   13   14    4   17   16    9   14    4 |    24   29   26   29   24   21   29   28   24   23    23
  16  |    9   16   11   16   24    7   12   21   13   14    5 |    18   25   17   17   27   14   21   19   23   21    14
  17  |    9   15   12   13   14    6   14   15   13   18    4 |    23   27   24   26   29   21   26   25   21   20    20
  18  |    9   15   10   15   21    6   17   16   12   14    4 |    13   24   11   18   23   10   22   19   19   16    12
  19  |   11   15   14   11   19    6   13   14   15   17    5 |    16   28   21   20   27   14   24   21   20   17    16
  20  |    8   13   10   13   17    6   11    9   11   16    4 |    19   18   15   20   25   13   19   18   21   17    14
  21  |    7    8   10    8   20    5   14   13   11   14    4 |    20   20   14   20   27   14   22   21   22   17    16
  22  |    9   12   10   16   19    5   14   12   10   12    4 |    12   21   11   21   26   12   19   16   19   13    12
  23  |    8   12   13   13   18    4   15   10   14   17    4 |    21   28   21   25   24   16   26   20   20   19    19
  24  |    7   14   11   15   16    5   19    9   11   10    4 |    23   29   25   26   28   23   32   23   30   21    24
  25  |    7   14   12   12   15    6   14    9    8    8    4 |  9999  684 9999 9999 9999 9999 9999 9999 9999 9999  9999
  26  |    7    9   12   11   13    7   12   12   10   12    3 |    22   21   19   30   18   19   19   23   20   20    19
 X27  |    7   10   13   10  ---    5   15   10   11   15    4 |    25   26   25   24  ---   21   34   24   25   25    24
  28  |    6   15   11   10   18    4   12   12   10    8    4 |    21   21   19   25   32   17   23   24   22   18    19
  29  |   10   16   13   14   20    5   17   12   13   17    5 |    22   26   23   26   26   19   26   24   27   22    20
 X30  |    6   12    9    7  ---    4   12    8    9   12    3 |    21   24   26   22  ---   21   30   23   24   21    22
  31  |    7   16   13   22   23    5   16   18   12   13    5 |    16   24   13   23   33   14   22   24   25   14    16
  32  |    8    9   10   12   15    6   14   13   11   14    4 |    41   44   44   38   44   39   45   48   39   45    42
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13   12   13   20    5   14   12   11   14      |T   23   47   22   26   28   20   26   25   25   22    21
 WRMS |    8   13   12   13   18    5   14   12   11   15      |NE  22   47   22   25   28   19   26   24   24   22    21
 MEDI |    8   12   12   13   18    5   13   12   11   14      |MD  21   25   20   25   27   17   24   23   23   20    19

Table 3.1810.2   GPS week: 1810   Day: 2   MJD: 56916.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   11   12    9   18    4   12   13   11   14    4 |    22   22   24   19   26   17   24   20   19   19    19
   2  |    7   12   11   18   21    6   13   12   12   15    4 |    20   21   18   27   23   13   17   22   20   20    16
  X3  |   34   29   16   21  ---   25  ---   17   31  ---   12 |    47   43   18   40  ---   50  ---   40   43  ---    37
   4  |    7    8   11   13   17    6    9   13    8   18    4 |    19   23   22   18   23   17   19   19   21   23    19
   5  |    7   13    9   12   21    6   16   13   12   14    4 |    23   26   16   28   29   16   20   24   22   19    19
   6  |    7    9    9   17   51    7   10   17   12   12    5 |    39   43   43   38   47   37   43   39   40   42    40
   7  |    8   11   10   14   19    4   12   12   11   15    4 |    23   27   20   31   32   19   24   23   22   19    21
   8  |    9    8   12   12   17    5    9   16   10   18    4 |    22   26   26   25   25   22   26   23   24   28    23
  X9  |   13   14   13   11  ---    8  ---   14   11  ---    6 |    47   44   44   39  ---   35  ---   42   40  ---    41
  10  |    5    9   12   11   17    6   10   10   11   17    4 |    64   62   62   67   56   64   66   61   68   58    62
  11  |    8    9   15    9   27    6   10   11    9    7    4 |    31   34   29   30   49   29   32   31   30   31    30
  12  |    9   15    9   19   18    4   19   19   14   15    5 |    24   26   16   33   29   17   22   24   29   17    20
  13  |    7   10   13   11   19    4   11   10   11   12    4 |    21   28   22   24   26   22   26   20   19   16    22
  14  |    9    8   13   12   12    4   11   13   12   16    4 |    25   29   27   26   28   24   24   27   30   24    24
  15  |   10   12   14   14   14    5   16   15   17   16    5 |    36   34   33   38   31   28   33   32   29   32    31
  16  |   11   12   13   23   24    6   13   22   13   13    5 |    20   20   17   25   27   17   19   20   23   19    16
  17  |    9   13   13   14   19    6   14   17   12   20    5 |    25   30   24   32   36   24   28   29   24   23    24
  18  |    9   17   13   18   19    6   14   17   12   17    5 |    21   26   20   22   27   18   22   18   23   19    17
  19  |   11   12   14   17   19    5   11   13   10   17    4 |    20   29   22   29   34   18   25   22   25   21    21
  20  |    9   13    9   14   16    5   12    9   10   10    4 |    25   24   21   25   27   18   21   21   26   16    20
  21  |    7    8   12   15   25    6    9   17   11   17    4 |    22   23   17   24   31   15   20   23   19   19    17
  22  |    7   11   10   14   16    5   11   14   12   12    4 |    20   27   20   25   30   20   22   20   28   13    20
  23  |   10   11   15   14   18    4   13   11   12   18    4 |    26   31   26   30   26   22   27   22   23   19    22
  24  |    9   13   12   16   15    9   14   13   15   15    4 |    21   25   22   21   24   21   25   23   27   22    20
 X25  |   29  ---   21   55  201   78  159   54   40   26   17 |  9999  --- 9999 9999 9999 9999 9999 9999 9999 9999  9999
  26  |    7   10   11   13   13    8    7   14   13   11    3 |    26   24   23   33   25   21   22   27   18   25    22
 X27  |   11    8   13   15  ---    6   15    7   13   13    4 |    25   31   26   28  ---   27   35   28   35   26    28
  28  |    7   10   13   14   21    6   10   13    9   10    4 |    20   22   19   28   34   18   23   25   21   21    20
  29  |    9   16   13   20   17    5   14   13   10   17    5 |    25   28   26   34   32   22   27   27   23   25    24
 X30  |    7   13   10    9  ---    5   13    9    7   12    4 |    26   28   30   27  ---   26   32   26   28   29    27
  31  |    8   13   13   16   20    5   11   18   13   16    4 |    20   27   18   30   35   20   22   24   24   21    21
  32  |    8   10   10   14   17    6   10   15    9   17    4 |    40   41   41   36   41   36   39   48   38   43    40
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   12   12   15   21    6   12   14   12   15      |T   27   29   25   30   31   24   27   27   27   24    25
 WRMS |    8   12   12   14   19    6   12   13   11   15      |NE  26   29   25   29   31   23   27   27   27   24    24
 MEDI |    8   11   12   14   18    6   12   13   12   15      |MD  24   27   22   28   29   21   24   24   24   21    22

Table 3.1810.3   GPS week: 1810   Day: 3   MJD: 56917.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   10   11   14   13    4   11    9   10   15    4 |    25   22   23   20   22   17   22   18   19   17    19
   2  |    6   16   11   18   16    6   10   13   11   20    4 |    20   24   19   23   23   14   18   21   20   22    16
  X3  |   21   30   22   25  ---   23  ---   16   21  ---   10 |    44   46   18   41  ---   55  ---   39   47  ---    39
   4  |    6    9   10   11   14    4    9   10    6   20    3 |    20   22   19   17   23   15   22   18   17   23    17
   5  |    9   12   11   11   21    5   13   13    9   13    4 |    20   24   15   22   28   16   19   21   21   13    16
   6  |    6   14    9   17   61    8   11   16    8   11    6 |    39   45   43   39   47   37   43   38   36   41    39
   7  |    8   11   10   12   18    4   13   12    8   16    4 |    23   26   17   25   31   17   22   21   22   15    19
   8  |    8   10   10   11   15    5   10   12    8   18    4 |    21   24   20   18   21   16   22   22   23   22    19
  X9  |   15   12   10   11  ---    5  ---   10   16  ---    5 |    51   45   46   43  ---   43  ---   44   54  ---    46
  10  |    5   13   12   11   12    5    9    9   10   12    3 |    48   49   50   44   52   47   50   52   50   50    49
  11  |    8    8   13   10   22    5   10    8    7   12    3 |    38   38   34   35   51   33   41   34   37   30    35
  12  |    9   16    8   13   18    4   18   18    8   14    4 |    24   27   18   26   29   18   23   23   21   16    19
  13  |    7   10   13   13   18    4   10   10   10   18    4 |    22   29   20   20   28   17   24   18   19   24    20
  14  |    8   10   14   15   12    5   10   12    9   16    4 |    25   33   25   28   24   25   25   27   23   23    24
  15  |   12   14   15   13   16    5   17   16   16   19    5 |    30   33   28   29   29   25   30   27   27   27    25
  16  |   10   16   11   16   23    6   12   20   11   15    5 |    22   26   22   25   23   21   24   24   23   22    19
  17  |    8   15   12   12   15    4   14   17   10   20    4 |    26   31   25   33   34   24   30   32   30   22    26
  18  |   12   12    8   15   20    6   15   16   12   18    5 |    25   25   19   21   23   17   26   14   19   15    16
  19  |   10   14   11   11   18    7   12   11   10   19    4 |    24   31   24   23   30   20   27   20   25   19    22
  20  |    7   15    7   13   15    4   11   10    9   14    3 |    24   22   17   21   24   15   19   18   20   14    17
  21  |    8    9   11   10   21    7    8   14    9   11    3 |    28   25   20   25   27   20   27   21   19   18    21
  22  |    9   11   10   14   19    5   12   12   13   13    4 |    21   23   20   23   26   18   21   17   21   18    17
  23  |    8   12   12   14   19    4   13   10    9   19    4 |    21   27   20   25   26   17   25   18   17   16    18
  24  |    8   12   11   16   19    5   17   12   11   12    4 |    39   37   39   38   36   36   36   37   39   39    36
  25  |    8   13   12   10   16    5   12   12   11   11    4 |   749 9999  751  753  760  742  752  745  748  749   748
  26  |    8   11   11   10   15    5   10   12    6   12    3 |    22   29   24   31   30   24   27   29   24   27    24
 X27  |   10    9   13   12  ---    7   14    9   10   13    4 |    36   41   38   41  ---   38   44   41   39   37    38
  28  |    7   14   13   10   18    4    9   13   11   10    4 |    19   22   16   21   31   16   19   23   23   17    17
  29  |    8   14   13   12   18    5   15   13   11   19    4 |    30   33   29   30   31   26   33   28   26   26    27
 X30  |    6   11   10    9  ---    4   14    8   12   13    4 |    25   28   25   21  ---   23   30   22   32   20    24
  31  |    9   13   11   15   21    5   14   14   11   15    4 |    19   29   18   27   35   22   25   22   26   19    20
  32  |    8   10    9   12   16    6    9   15   10   15    4 |    51   54   52   56   51   51   56   58   52   53    53
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   12   11   13   21    5   12   13   10   16      |T   50   31   48   51   56   47   52   49   50   48    48
 WRMS |    8   12   11   14   19    5   12   12    9   16      |NE  51   30   49   51   56   47   52   50   50   48    48
 MEDI |    8   12   11   12   18    5   12   12   10   15      |MD  25   29   22   25   29   21   25   23   23   22    21

Table 3.1810.4   GPS week: 1810   Day: 4   MJD: 56918.000                            

        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   13   12   15    6   12    9   11   10    3 |    20   20   22   20   23   16   21   16   17   15    16
   2  |    8   15   13   19   18    5   12   15   10   19    5 |    16   22   15   25   21   13   16   21   17   21    12
  X3  |   28   47  ---   20  ---   17  ---   18   48  ---   17 |    59   67  ---   54  ---   50  ---   54   63  ---    53
   4  |    5    9   11   11   18    6   11   13    9   16    4 |    18   21   20   19   24   16   18   17   18   21    16
   5  |    7   13    9   11   19    4   16   11   12   11    4 |    23   26   17   25   30   17   21   21   19   14    18
   6  |    7   10    8   14   53    7   15   15    8   11    5 |    41   43   42   36   51   38   42   37   40   40    40
   7  |    8   12   11   15   16    3   13   12    8   15    4 |    23   24   16   27   30   16   22   20   19   17    18
   8  |    7   11   11   11   18    4    9   14   11   20    4 |    20   22   20   19   22   16   21   19   17   25    18
  X9  |    9   11   10   14   58    6  ---   12    9   17    6 |    41   44   37   37   32   38  ---   40   44   35    41
  10  |    8   10   10   10   16    5   10   12   13   12    4 |    30   31   30   26   32   31   32   32   34   33    30
  11  |    6    8   13   11   22    4   10    9   11    8    3 |    28   33   24   27   46   25   31   28   32   27    28
  12  |    8   16    7   14   18    6   19   14   15   13    4 |    21   23   13   25   28   15   21   23   21   15    16
  13  |    7   10   13   12   18    4   10   10   10   15    4 |    23   29   22   26   32   18   26   20   19   20    20
  14  |    9   10   15   14   11    5   14   11   11   12    4 |    23   26   23   19   23   19   24   25   28   18    21
  15  |    9   12   13   11   15    6   16   16   14   14    4 |    26   31   28   31   29   24   28   29   28   25    25
  16  |   13   19   11   21   25    6   15   20   14   15    5 |    17   22   13   21   25   11   18   19   15   18    10
  17  |   10   16   14   13   18    6   12   17   13   18    5 |    21   28   23   29   32   19   26   29   23   22    21
  18  |    7   17   10   17   19    5   14   16   11   13    4 |    19   24   18   24   28   18   26   16   23   16    16
  19  |   10   15   12   16   16    5   11   10   12   16    4 |    16   26   18   22   29   14   22   20   23   17    17
  20  |    9   13    7   12   18    4   12    8    8   12    3 |    23   21   15   23   28   17   20   19   21   14    17
  21  |    6   10   12    9   22    4   12   13    8   14    4 |    21   22   15   23   30   14   20   19   19   18    16
  22  |    5   12    9   14   18    5   11   12   13   12    4 |    15   23   15   23   30   16   21   17   23   13    16
  23  |    9   13   13   14   19    4   12   12   14   16    4 |    23   26   20   26   22   16   23   16   16   13    17
  24  |    6   13   12   12   12    7   12   12   13   12    4 |    30   34   32   30   33   33   34   28   38   30    31
  25  |    7   16   10   11   15    4   13   13   14    9    4 |   561  388  563  559  548  562  557  561  559  562   561
  26  |    7   10    8   10   14    5   10   11   13   12    3 |    20   27   23   31   22   19   21   28   20   25    21
 X27  |    6    9   15   12  ---    4   12   11   13   12    4 |    30   27   28   25  ---   26   34   26   33   21    27
  28  |    6   12   10   14   21    5   11   12   12   10    4 |    17   20   15   24   32   14   17   22   23   15    16
  29  |    9   14   12   14   18    3   14   14   12   14    4 |    25   28   26   30   31   23   29   30   25   27    24
 X30  |    5   13    9    8  ---    5   13    8   10   11    3 |    23   24   24   18  ---   19   27   20   23   21    21
  31  |    6   15   10   21   20    5   18   12   15   14    5 |    16   26   13   23   32   15   23   17   21   13    14
  32  |    6   11    8   12   17    6   10   15    9   14    4 |    43   46   42   44   40   40   44   48   41   46    43
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   13   11   14   20    5   13   13   12   14      |T   41   39   39   43   47   38   42   41   42   39    39
 WRMS |    8   13   11   14   18    5   13   12   10   13      |NE  41   38   39   43   47   38   42   41   41   39    38
 MEDI |    7   12   11   12   18    5   12   12   12   13      |MD  23   26   22   25   30   18   23   21   23   21    18

Table 3.1810.5   GPS week: 1810   Day: 5   MJD: 56919.000                            

        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   11   11   15    5   12   11   10   12    3 |    20   20   21   19   22   15   23   14   15   14    16
   2  |    7   18   11   18   18    5   13   12   11   18    4 |    19   27   15   25   21   14   20   21   13   20    14
  X3E |   16  ---  ---   38  ---  129  ---  ---  ---  ---   26 |    43  ---  ---   55  ---  112  ---  ---  ---  ---    39
   4  |    9   10   11   13   16    6   12   14    8   18    4 |    19   20   18   15   19   13   20   16   14   19    15
   5  |    7   13   10   12   26    4   18    9   11   11    4 |    16   22   12   22   31   12   21   19   21   16    15
   6  |    6   10    8   13   47    8   12   15   12   10    5 |    39   39   38   37   46   31   40   33   33   35    36
   7  |    8   11   11   10   21    3   12   13    8   15    4 |    23   24   16   24   32   15   23   19   17   12    17
   8  |    8   11   12   13   22    3   11   14    9   17    4 |    23   24   22   21   22   18   26   21   16   20    19
  X9  |    9   12   11   11   52    7  ---   11    9   21    6 |    37   39   34   33   31   33  ---   33   39   29    36
  10  |    5   13    8   13   21    6   12   10    7   15    4 |    33   36   32   36   32   31   31   35   32   32    32
  11  |    7   10   14    7   26    3   10   10    9    8    4 |    24   30   24   25   44   23   30   24   29   21    24
  12  |    9   17   10   14   15    7   20   17    9   12    4 |    25   29   21   24   28   19   23   25   23   15    20
 X13  |    4  ---  ---  ---  ---   25  ---  ---  ---  ---    0 |    14  ---  ---  ---  ---    5  ---  ---  ---  ---    13
  14  |    7   10   13   14   17    6   16   13    8   12    4 |    26   25   24   26   27   20   25   27   20   18    21
  15  |    9   15   14   15   17    5   18   16   13   17    5 |    22   30   25   28   27   20   30   24   22   19    20
  16  |   12   21   11   14   25    6   17   23   12   12    5 |    19   27   14   20   20   11   19   22   17   16    13
  17  |   10   16   12   13   18    7   15   17    8   16    4 |    21   28   23   26   29   19   27   31   24   23    21
  18  |    7   16    8   13   24    5   17   15   11   12    4 |    21   25   19   25   24   19   32   22   23   22    19
  19  |    8   13   12    9   19    4   12   12   11   16    4 |    16   25   20   18   25   15   23   19   17   17    15
  20  |    9   13   10   12   19    5   12    9    9   10    4 |    23   23   15   18   27   16   22   18   18   16    17
  21  |    6   17   10   12   22    5   17   11   14   17    4 |    22   27   16   26   24   15   29   17   20   23    17
  22  |    6   15    9   14   22    5   13   10   10   13    4 |    18   23   16   26   27   17   23   15   20   19    16
  23  |   11   14   14   11   24    5   14   11   14   18    5 |    23   28   21   21   25   16   26   16   16   11    16
  24  |    7   11   12   11   15    6   14   10    7   10    3 |    32   32   36   35   34   32   37   30   36   31    32
  25  |    8   15   11    9   12    5   14   14    8    9    4 |   391  420  393  393  393  389  391  394  389  386   391
  26  |    5   12   10   23   19    5   10   11    8   12    4 |    26   32   25   42   30   25   30   29   26   27    27
 X27  |    4    6   12    9  ---    3   13   12    9   13    3 |    25   26   24   29  ---   24   29   26   26   24    25
  28  |    7   13   11   20   17    5   15   10    8   10    4 |    20   22   17   28   31   15   20   22   20   19    18
  29  |    9   15   13   14   19    4   14   11   13   15    4 |    26   32   27   28   25   22   25   26   24   22    22
 X30  |    4   15   10   16  ---    5   15    8    9   12    4 |    22   26   24   26  ---   21   27   20   24   21    21
  31  |   12   17   10   13   22    4   17   10   13   12    4 |    23   29   17   22   33   17   23   21   24   12    18
  32  |    9   18    8   15   21    8   14   16    8   15    4 |    79   81   81   77   74   74   79   92   80   79    80
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   14   11   14   22    5   14   13   10   14      |T   37   42   36   40   42   35   40   37   36   34    34
 WRMS |    8   14   11   13   20    5   14   12    9   14      |NE  37   42   36   39   42   32   40   37   36   34    34
 MEDI |    7   13   11   13   19    5   14   11    9   12      |MD  23   27   21   26   27   19   26   22   22   20    19

Table 3.1810.6   GPS week: 1810   Day: 6   MJD: 56920.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   10   12   10   18    4   11   14   14   10    4 |    21   21   21   21   24   16   20   15   20   11    17
   2  |    8   15   11   18   22    6   13   14   12   20    5 |    16   24   13   27   25   12   16   19   19   23    13
  X3E |   35   34  ---   27  ---   20  ---   27   37  ---   16 |    62   79  ---   62  ---   71  ---   72   61  ---    58
   4  |    8    8   10    9   17    4    9   16   12   16    4 |    13   17   15   14   20   11   16   16   18   17    13
   5  |    7   12    9   12   25    4   18   10   13   10    4 |    18   23   13   26   30   15   19   22   25   16    18
   6  |    6   11    9   14   50    6   12   13   10   10    5 |    48   50   50   43   61   46   49   41   48   47    47
   7  |    9    9   11   13   21    4   13   16    8   13    4 |    22   23   17   27   29   15   19   20   21   12    17
   8  |    8   11   12    7   18    4    9   15   11   19    4 |    16   20   20   19   18   15   18   18   22   23    17
  X9  |   11    9    9   14   58    7  ---   22   10   18    7 |    82   85   78   76   54   77  ---   88   80   62    81
  10  |    5   12   13   12   20    5   12   11   11   17    4 |    22   25   22   25   26   23   25   28   27   24    23
  11  |    7    8   14    8   23    3    9   16    9    7    4 |    31   36   30   33   52   32   38   36   37   33    33
  12  |   11   15   11   13   19    5   22   21   10   14    5 |    24   27   18   25   30   17   25   25   22   12    18
 X13  |   10   11   13   11  ---    5   10   12    9   14    4 |     8   14   15    3  ---    6   11    4    5    4     7
  14  |   10   10   12   13   13    4   12   16   10   12    4 |    28   32   27   29   26   25   27   32   32   25    27
  15  |    9   14   14   11   17    4   18   19   14   14    5 |    33   36   33   36   34   30   33   32   36   29    31
  16  |   12   17   11   17   26    6   15   23   13   15    5 |    21   24   16   21   21   15   20   20   24   18    15
  17  |    8   14   12   11   21    6   13   16   12   18    4 |    26   31   24   30   38   23   27   33   27   23    25
  18  |    8   15    7   14   18    5   11   19   10   12    4 |    16   22   16   18   23   13   19   14   18   15    13
  19  |   12   15   12   16   19    5   10   15   14   16    5 |    20   30   21   26   30   19   23   26   29   20    21
  20  |   10   12   10   10   18    4    9   11    8   11    3 |    21   19   14   22   20   16   18   18   21   18    16
  21  |    8   12    9   12   25    3   13   11   12   15    4 |    17   23   15   22   30   12   20   15   17   18    14
  22  |    7   14    7   13   17    4   12   13   11   10    4 |    15   23   14   20   23   12   19   13   17   14    13
  23  |   12   13   13   12   24    7   12   14   11   17    5 |    25   29   19   27   28   17   23   22   21   12    19
  24  |    9    9   10   10   16    4   12   17    7   11    4 |    29   32   32   30   30   28   31   36   35   28    30
  25  |    9   11   13   11   14    3   13   17    9    7    4 |   315  306  317  316  315  313  311  319  313  312   314
  26  |    7   11   10   12   20    6   10   12   12    8    4 |    22   27   25   30   29   22   21   29   27   25    23
 X27  |    8    9   13   11  ---    5   10   16   10   14    4 |    28   31   26   32  ---   29   34   35   36   29    30
  28  |    8   14    9   12   24    5   12   12    8    8    4 |    17   20   14   23   35   13   17   21   20   14    16
  29  |   10   18   12   15   20    5   17   13   15   17    5 |    31   40   31   35   36   30   36   34   36   32    31
 X30  |    8   14   10   17  ---    6   14   11   12   11    4 |    24   29   26   26  ---   22   30   21   28   22    24
  31  |   10   17   11   17   21    4   13   18   16   13    5 |    17   31   18   26   32   20   26   21   29   18    19
  32  |   10   12   10   12   21    6   12   19   15   16    4 |    42   48   45   48   42   41   47   54   51   48    46
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   11   13   22    5   13   15   12   14      |T   35   39   33   38   41   33   34   37   38   32    34
 WRMS |    9   13   11   12   20    5   13   15   10   14      |NE  34   38   33   37   41   31   34   36   37   32    33
 MEDI |    8   12   11   12   20    5   12   15   11   14      |MD  22   27   21   26   30   19   23   22   27   22    19



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 4.1810   GPS week: 1810   MJD: 56914.0-56920.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3022 |U    6     6    12 |U    6     7    20 |U    7     8    17 |
emr | emr 3022 |     9     9    18 |U    6     7    21 |     8     9    18 |
esa | esa 3017 |     6     6    15 |U    6     7    22 |     8     8    17 |
gfz | gfz 3057 |U    6     6    13 |U    6     7    22 |U    7     7    17 |
grg | grg 2701 |     9    10    18 |U    7     8    29 |U    9    10    21 |
igr | igr 3050 |     6     6    13 |     5     6    20 |     8     8    16 |
igs | igs 3041 |     6     7    13 |     5     6    20 |     7     8    16 |
jpl | jpl 2865 |     8     8    17 |U    7     8    23 |     9     8    19 |
mit | mit 3044 |U   11     8    27 |U    7     9    25 |U    9     9    19 |



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 5.1810.0   GPS week: 1810   Day: 0   MJD: 56914.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3034 |     4     4    11 |     5     7    19 |     6     7    14 |
emr | emr 3062 |     7     7    19 |     6     6    18 |     9     8    16 |
esa | esa 3072 |     4     5    14 |     6     6    22 |     8     7    14 |
gfz | gfz 3072 |     4     4    13 |     6     6    20 |     6     5    15 |
grg | grg 2688 |     6     5    18 |     6     8    34 |     8    10    19 |
igr | igr 3072 |     4     4    11 |     5     6    20 |     7     6    12 |
igs | igs 3072 |     4     4    13 |     5     6    19 |     7     6    13 |
jpl | jpl 2876 |     6     5    16 |     8     8    28 |     9     6    15 |
mit | mit 3072 |     5     6    13 |     7     8    19 |     7     6    15 |

Table 5.1810.1   GPS week: 1810   Day: 1   MJD: 56915.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3048 |     5     5    13 |     4     5    18 |     8     6    12 |
emr | emr 3062 |     7     9    14 |     4     5    23 |     8     9    15 |
esa | esa 3072 |     5     4    10 |     5     5    23 |     8     6    13 |
gfz | gfz 3071 |     5     5    13 |     4     5    19 |     7     6    12 |
grg | grg 2688 |     7     8    16 |     5     5    30 |     9     9    16 |
igr | igr 3048 |     5     5    11 |     4     4    19 |     8     7    11 |
igs | igs 3072 |     5     5    12 |     4     4    19 |     7     6    11 |
jpl | jpl 2880 |     7     7    14 |     5     5    19 |     9     8    14 |
mit | mit 3072 |    34    16   105 |     8    14    31 |    10     9    23 |

Table 5.1810.2   GPS week: 1810   Day: 2   MJD: 56916.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3036 |     7     7    11 |     5     7    21 |     7     7    18 |
emr | emr 2969 |    14    12    13 |     6     7    22 |     8     8    13 |
esa | esa 3072 |     8     8    13 |     6     7    24 |     8     7    16 |
gfz | gfz 3072 |     8     7    12 |     5     7    21 |     8     7    17 |
grg | grg 2687 |    12    11    16 |     7     9    31 |    10    11    25 |
igr | igr 3071 |     8     9    11 |     5     6    19 |    10     7    14 |
igs | igs 3072 |     9     9    12 |     5     6    20 |     7     7    15 |
jpl | jpl 2880 |    11    10    14 |     6     9    16 |     9     9    19 |
mit | mit 3072 |     8     7    11 |     8     7    26 |     7     7    16 |

Table 5.1810.3   GPS week: 1810   Day: 3   MJD: 56917.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3042 |     7     6     9 |     6     7    20 |     8    10    22 |
emr | emr 3063 |     8     8    14 |     6     6    19 |     8     9    22 |
esa | esa 3072 |     6     6    12 |     6     6    21 |     8     9    21 |
gfz | gfz 3070 |     7     6     9 |     6     9    24 |     8     9    21 |
grg | grg 2688 |    10    10    13 |     8     7    26 |    11    11    26 |
igr | igr 3047 |     6     5    11 |     5     6    19 |     9     9    22 |
igs | igs 3040 |     7     7    10 |     5     6    18 |     8     9    21 |
jpl | jpl 2878 |     9     9    17 |     5     7    16 |     8     8    24 |
mit | mit 3072 |     8     6    12 |     6    10    22 |    11    11    24 |

Table 5.1810.4   GPS week: 1810   Day: 4   MJD: 56918.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3026 |     8     7    16 |     6     7    23 |     7     7    16 |
emr | emr 3060 |    12    10    26 |     7    10    22 |     7     6    14 |
esa | esa 2976 |     8     7    21 |     6     8    24 |     8     8    16 |
gfz | gfz 3072 |     8     7    18 |     6     8    24 |     7     6    14 |
grg | grg 2784 |    10    11    28 |     8     9    30 |     8     8    17 |
igr | igr 3072 |     8     7    18 |     6     8    23 |     7     8    14 |
igs | igs 3045 |     8     7    19 |     6     8    22 |     7     6    15 |
jpl | jpl 2879 |    11     7    25 |     7    10    24 |     8     7    18 |
mit | mit 3072 |     9     7    17 |     7     9    28 |     9     9    14 |

Table 5.1810.5   GPS week: 1810   Day: 5   MJD: 56919.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2944 |     5    10    16 |     5     6    17 |     8    15    21 |
emr | emr 2880 |     8    12    20 |     6     8    18 |    11    16    27 |
esa | esa 2880 |     7     9    18 |     7     7    19 |     9    15    22 |
gfz | gfz 2976 |     6    10    18 |     6     8    19 |     8    13    23 |
grg | grg 2688 |     9    14    21 |     7    10    29 |     9    16    22 |
igr | igr 2976 |     6    10    17 |     6     6    20 |     9    14    20 |
igs | igs 2932 |     6    10    16 |     6     6    19 |     8    14    21 |
jpl | jpl 2784 |     9    10    22 |    11    10    30 |    11    14    22 |
mit | mit 2880 |     6     9    16 |     6     6    23 |    10    14    22 |

Table 5.1810.6   GPS week: 1810   Day: 6   MJD: 56920.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3029 |     5     6    11 |     7     8    21 |     7     6    16 |
emr | emr 3060 |     8     8    17 |     7    10    25 |     8     6    18 |
esa | esa 2976 |     5     5    13 |     8     8    24 |     7     5    17 |
gfz | gfz 3067 |     5     6    10 |     8     8    24 |     7     5    17 |
grg | grg 2688 |     7     8    18 |     7    11    27 |     8     7    20 |
igr | igr 3066 |     5     5    12 |     7     8    21 |     7     6    17 |
igs | igs 3057 |     5     6    12 |     7     8    23 |     7     5    16 |
jpl | jpl 2880 |     7     7    16 |     8     9    24 |     9     6    21 |
mit | mit 3072 |     9     8    14 |    10    11    26 |    10    10    20 |


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 6.1810   GPS week: 1810   MJD: 56914.500-56920.500

                                                         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 |     -31      -5       8       1     -2 |      24     28
            |      18      10      57      83      4 |       4
emr   uuuuu |      26     -22      87     125    -13 |      27     37
            |      19      23      97      87     10 |      10
esa   uuuuu |      27     -13      24      28      2 |      25     29
            |       6      20      37      50      6 |       3
gfz   uuuuu |       7      -3    -108     -41      4 |      18     24
            |      15      14      86      73      4 |       3
grg   uuuuu |       9       9     -65    -118      6 |      34     36
            |      15      32      94     104      3 |       2
igr   xxxxx |      24       6     -50      99     -1 |      -3     15
            |      10      19      53      43      5 |       3
irf   xxxxx |      24       3     -25     169     -2 |      -3     14
            |       9      18      56      43      5 |       4
jpl   uuuuu |      12      11       3     166     -1 |      19     25
            |      31      18      81      76     11 |       2
mit   uuuuu |      -8      18     -98    -150     -4 |      24     28
            |      12      20      30      70      8 |       3
ngs   uuuuu |     -13      13      73     -69      1 |       8     16
            |      35      65      60      51      9 |       4
sio   xxxxx |      38      -3     -21     189      0 |      34     37
            |      12      34      60      46      6 |       3


Table 7.1810.0   GPS week: 1810   Day: 0   MJD: 56914.500

                                                         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 |     -62       7      54     -72     -1 |      27     30
emr   uuuuu |      20      -8     136     152    -30 |      41     47
esa   uuuuu |      19      21     -17       5      1 |      28     31
gfz   uuuuu |       7      14    -126     -23      1 |      21     25
grg   uuuuu |       8      36    -176    -182      6 |      36     38
igr   xxxxx |      36       2    -114     142     -6 |       1     12
irf   xxxxx |      35      32     -87     213      3 |       0     12
jpl   uuuuu |      76      -8       6     290     19 |      20     24
mit   uuuuu |      -2      49     -91    -132      7 |      26     29
ngs   uuuuu |      -6     -73      49     -63     -8 |      13     16
sio   xxxxx |      54      40     -87     238      5 |      37     39

Table 7.1810.1   GPS week: 1810   Day: 1   MJD: 56915.500

                                                         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 |     -29      -2     -14     143     -2 |      29     31
emr   uuuuu |       2      21     103     -25    -14 |      37     45
esa   uuuuu |      27       4       2     135     -7 |      30     32
gfz   uuuuu |     -12      -8    -194    -131     -5 |      23     26
grg   uuuuu |       1      10     -82    -215      7 |      37     39
igr   xxxxx |      10      17     -72      79      2 |       2     12
irf   xxxxx |      12      14      32     109     -4 |       2     10
jpl   uuuuu |      -1      16     142      72      4 |      24     27
mit   uuuuu |     -16      35     -38    -153     -3 |      29     31
ngs   uuuuu |      46     -65      48     -41      4 |      13     16
sio   xxxxx |      30      26      41     125      1 |      39     40

Table 7.1810.2   GPS week: 1810   Day: 2   MJD: 56916.500

                                                         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 |     -17       1      -7      82      2 |      25     29
emr   uuuuu |      14     -41     197      60     -4 |      31     41
esa   uuuuu |      33     -10      21      23     15 |      25     29
gfz   uuuuu |      -6     -13    -196    -114      9 |      18     24
grg   uuuuu |      20      66    -193    -204      7 |      33     35
igr   xxxxx |      22      25    -112     127      3 |      -2     15
irf   xxxxx |      29       9     -54     182      6 |      -2     15
jpl   uuuuu |       5      10      56     150      3 |      19     24
mit   uuuuu |     -15      24     -99    -215      6 |      26     29
ngs   uuuuu |     -13       1      40      -9    -12 |       9     16
sio   xxxxx |      39      24     -52     202      9 |      35     38

Table 7.1810.3   GPS week: 1810   Day: 3   MJD: 56917.500

                                                         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 |     -23     -21     115     -78      0 |      23     28
emr   uuuuu |      47     -26     -37     133    -14 |      27     39
esa   uuuuu |      28     -33      68      36      1 |      25     29
gfz   uuuuu |      -5     -11      11     -76      4 |      17     24
grg   uuuuu |      -5      -8     -48     -88     12 |      32     34
igr   xxxxx |      32       7       8      87      5 |      -3     16
irf   xxxxx |      17       4     -86     143     -6 |      -3     15
jpl   uuuuu |      12      39    -107     188     -1 |      18     24
mit   uuuuu |     -18      17    -129     -70    -12 |      25     29
ngs   uuuuu |     -21      42      13     -40      1 |       6     17
sio   xxxxx |      27     -10     -86     161      1 |      33     36

Table 7.1810.4   GPS week: 1810   Day: 4   MJD: 56918.500

                                                         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 |     -23     -12     -32     -25     -9 |      23     28
emr   uuuuu |      39     -47     155     121    -20 |      23     33
esa   uuuuu |      30     -10       9       3      2 |      24     28
gfz   uuuuu |      23      18     -18     -18      5 |      17     24
grg   uuuuu |      26       1     -25     -19      3 |      33     36
igr   xxxxx |      22      20     -60     104     -6 |      -3     16
irf   xxxxx |      29      -1     -36     233     -8 |      -4     15
jpl   uuuuu |       4      23       5     219     -6 |      19     25
mit   uuuuu |       7      12    -126     -79    -13 |      24     28
ngs   uuuuu |     -68      28      52    -157     12 |       6     17
sio   xxxxx |      50     -40     -33     255     -4 |      33     36

Table 7.1810.5   GPS week: 1810   Day: 5   MJD: 56919.500

                                                         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       1     -10       1     -4 |      20     26
emr   uuuuu |      49     -32     -58     226     -2 |      15     28
esa   uuuuu |      33     -25      84      11      3 |      22     27
gfz   uuuuu |      28      -7     -61      -3      5 |      15     22
grg   uuuuu |      25     -11       3      57      7 |      31     35
igr   xxxxx |      14       6       4      20      1 |      -6     18
irf   xxxxx |      28     -12       1     151     -2 |      -7     17
jpl   uuuuu |      14       9     -62      81     -9 |      17     24
mit   uuuuu |      10      -8     -95    -135     -8 |      21     27
ngs   uuuuu |     -35      53     123    -119      4 |       4     17
sio   xxxxx |      44     -13       5     167     -9 |      30     34

Table 7.1810.6   GPS week: 1810   Day: 6   MJD: 56920.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -12     -11     -49     -45      4 |      19     26
emr   uuuuu |      13     -21     110     211     -3 |      13     27
esa   uuuuu |      19     -34       4     -17      0 |      22     27
gfz   uuuuu |      14     -15    -172      82      5 |      15     22
grg   uuuuu |     -11     -30      68    -173      3 |      32     35
igr   xxxxx |      33     -31      -6     138     -4 |      -6     18
irf   xxxxx |      17     -23      54     151      1 |      -7     18
jpl   uuuuu |     -23     -14     -22     164    -16 |      17     24
mit   uuuuu |     -19      -2    -106    -265     -7 |      20     26
ngs   uuuuu |       9     107     187     -53      6 |       5     17
sio   xxxxx |      24     -46      65     176     -5 |      30     34



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