[IGSREPORT-22390] Wk 1771 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri Jan 3 06:08:51 PST 2014


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1771   (Dec 15, 2013 - Dec 21, 2013)

Contacts: J. Griffiths (jake.griffiths at noaa.gov)
          K. Choi (kevin.choi at noaa.gov)


COMBINATION STRATEGY:
---------------------

Starting with GPS week 860, the IGS Final orbit combination is done directly
in the ITRF without any alignment to the Bulletin B EOP series.

Each centre satellite clock corrections are first transformed to a common 
reference. One of the following two methods can be used (the REMARKS section of
this report gives which method is used):
[1] For each centre, a clock offset and a drift are estimated with respect to
    the broadcast clock corrections using only non-SA satellites;
[2] A chosen reference centre is aligned to the broadcast clock corrections
    using all satellites. All other centres are then aligned to that reference
    centre. 
The offsets and drifts are used to align each centre satellite clock
corrections to GPS time. Ephemerides and clock corrections are then combined
as weighted averages computed over all centres. Each centre is given a
position weight and a clock weight. The position weights are computed from
each centre's absolute deviation to the unweighted average orbit after the
estimation of a 7-parameter Helmert transformation. The clock weights are
either computed from [1] the absolute deviation of the initial alignment to
broadcast clock for the non-SA satellites, or [2] from the absolute deviation
of centre's aligned clock corrections with respect to the unweighted mean.
Finally, a 7-parameter Helmert transformation and clock offset and drift are
estimated for each centre with respect to the combined solutions and parameters
and RMS of fit reported. All the above estimations are performed using the
L1-norm robust scheme.

  Each centre ephemerides are also evaluated individually and independently from
the orbit combination by using week long arcs. The Earth Orientation Parameters
(EOP) used in this evaluation are those submitted by the respective centres.
The IGS combined orbits/clocks and all centres providing both orbit and clock 
solutions are further evaluated by an independent point positioning (navigation)
program that uses both phase and pseudorange data 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:

igs1771[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1771[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1771[0-6].cls  IGS GPS clock combination summary report.
igs17717.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs17717.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  |  ALL   | 30
                0  |  COD   | RABT
                0  |  ESA   | UNSA
                0  |  GFZ   | 1 BOGT NRMD BOGT RABT
                0  |  GRG   | IISC
                0  |  MIT   | 2 9 26 2 9 26 GMSD GMSD
                1  |  ALL   | 30
                1  |  COD   | BJFS HOB2 HOLB
                1  |  EMR   | 3 3 MCM4
                1  |  ESA   | BJFS
                1  |  GFZ   | 1 1 BJFS HRAO MCM4 HRAO IISC MCM4
                1  |  GRG   | 1 3 26 IRKJ ABMF BJFS BUCU IRKJ KELY KOUR POLV
                1  |  JPL   | 3
                1  |  MIT   | 2 3 6 19 21 22 26 28 2 3 6 21 22 26 28 AREQ USNO
                2  |  EMR   | 3 26 3 26
                2  |  ESA   | NKLG
                2  |  GFZ   | 26 KERG MCM4 TIDB GLPS IRKJ KERG MCM4 TIDB
                2  |  GRG   | 3 26 IRKJ NRMD IRKJ KOUR MAL2 NRMD
                2  |  JPL   | 3 26
                2  |  MIT   | 2 3 22 26 27 3 22 26 27 USNO USNO
                3  |  COD   | NKLG NKLG
                3  |  EMR   | 3 26 3 26
                3  |  ESA   | NKLG NKLG UNSA
                3  |  GFZ   | 1 1 HRAO OPMT HRAO NTUS OPMT RABT
                3  |  GRG   | 1 3 26 IRKJ BARH DGAR FLIN GRAZ IRKJ KOUR
                3  |  JPL   | 3 26
                3  |  MIT   | 2 3 21 26 3 21 26 KOUR NTUS USNO NTUS USNO
                4  |  COD   | 26 NKLG NKLG
                4  |  EMR   | 3 26 3 YEBE YEBE
                4  |  ESA   | 26
                4  |  GFZ   | 2 26 2 26 NKLG STJO TIDB ABPO NKLG TIDB
                4  |  GRG   | IRKJ NOVM IRKJ
                4  |  JPL   | 1 3 26
                4  |  MIT   | 1 2 3 9 26 1 2 3 9 CAS1 KOUR NYAL STJO CAS1 KOUR
                4  |  MIT   | NYAL STJO
                5  |  COD   | 3 3 6 26
                5  |  EMR   | 6
                5  |  ESA   | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                5  |  ESA   | 21 22 23 24 25 26 27 28 29 31 32 1 2 3 4 5 6 7 8
                5  |  ESA   | 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
                5  |  ESA   | 26 27 28 29 31 32
                5  |  GFZ   | 1 3 26 1 3 6 26 NRMD NRMD
                5  |  GRG   | 6 24 ALRT AUCK BOGT BRUX CHTI COCO DGAR FAA1 GLSV
                5  |  GRG   | GOLD GRAZ HLFX HNPT HOLB INVK IRKT JPLM KARR KELY
                5  |  GRG   | KIRU KOKB MAR6 MATE MONP NANO PDEL POL2 REYK SFER
                5  |  GRG   | STR1 THU3 TNML TOW2 TWTF WILL ZAMB ALIC POL2 TIDB
                5  |  GRG   | WHIT
                5  |  MIT   | 2 6 22 2 22
                6  |  COD   | 3 26 NRC1 BOR1 NRC1
                6  |  EMR   | 3 6 12 15 26 29 6 12 15 17 27 29 NRC1 NRC1
                6  |  ESA   | 3 26
                6  |  GFZ   | 1 2 3 1 2 3 26 ARTU ARTU ZAMB
                6  |  GRG   | 1 3 6 26 1 6 GRAZ IISC IRKJ GRAZ IISC
                6  |  JPL   | 6 12 15 17 29
                6  |  MIT   | 1 2 3 6 7 9 16 18 19 21 24 26 27 1 2 3 6 7 8 9 16
                6  |  MIT   | 18 19 24 26 27 AUCK CAS1 DARW MANA MDVJ MIZU NRC1
                6  |  MIT   | CAS1 MANA

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets. Note that only the largest clock offset and drift are output
    to the summary file. However, the clock combination and the listed RMS
    include all the clock segments. In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                0  |  GRG   | ~15:30 | ~ 0.16 ns
                1  |  GRG   | ~00:10 | ~ 0.17 ns
                2  |  GRG   | ~23:55 | ~ 0.26 ns
                3  |  GRG   | ~02:30 | ~ 0.18 ns
                4  |  GRG   | ~11:56 | ~ -0.15 ns
                5  |  GRG   | ~17:30 | ~ -0.24 ns
                6  |  GRG   | ~00:10 | ~ 0.16 ns

 6. 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.

 7. Velocity changes were estimated to alleviate the effects of modeling problems,
    experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G30 |    |    |    |    |  4 |  4 |  4 |

 8. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) all IGS products, including the IGS combined
    orbits, are based on the IGS realization of the ITRF2005 reference frame
    (IGS05). For more information see IGSMAIL #5447. The IGS05 frame is also the
    basis for the homogeneously reprocessed IGS products from GPS Weeks 730 to 1459
    (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products, are
    based on the IGS realization of the ITRF2008 reference frame (IGS08). For more
    information see IGSMAIL #6354.
    
    Starting 07-Oct-2012 (GPS Week 1709, day 0, MJD 56207) all IGS products, are
    based on the updated IGS08 frame (IGb08). For more information see IGSMAIL
    #6663.

 9. Small rotations were applied to all the AC orbit and ERP values in order to
    align them to the current IGS reference frame. These RX, RY and RZ rotations
    were estimated in the IGS SINEX combination process, performed by the IGS
    Reference Frame Coordinator at the Institut Geographique National (IGN).
    Starting on 19-Aug-2012 (GPS Week 1702; MJD=56158), ACs began contributing
    products based on 1d SINEX integrations. As a result, the SINEX combinations
    are now done daily instead of weekly, and the associated daily rotations are
    applied here to the orbits and ERPs. The estimated 7 transformations, from
    which only the 3 rotations are applied to the orbit and ERP values, are:
    
            |     |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre | Day |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+-----+---------------------------------------------------
       COD  |   0 |   -2.4    -.2   -2.4     -39     19      6     .19
       EMR  |   0 |    6.8    8.1    2.6      36     18     -1     .07
       ESA  |   0 |    8.3   13.8    4.1      38    -26     49    -.05
       GFZ  |   0 |     .3     .0   -1.0     -16    -39      7     .02
       GRG  |   0 |    6.8    6.4  -25.2      -5     11     -7     .51
       JPL  |   0 |    2.8   11.8    3.4     -57    -26     24    -.01
       MIT  |   0 |    9.2    7.3   -1.3      23     -6    -49     .19
       NGS  |   0 |    -.1   -2.6  -15.5      55      2      1     .67
       SIO  |   0 |    5.7    5.5  -15.8     101   -145    399     .33

       COD  |   1 |   -2.3   -1.0   -2.4     -61     13     -4     .16
       EMR  |   1 |    4.5    8.2   11.6      39     17    -18    -.02
       ESA  |   1 |    1.6   15.6    6.8      18    -48     67    -.04
       GFZ  |   1 |     .1     .3   -1.3     -30    -43      4    -.03
       GRG  |   1 |     .5    7.4  -14.5       8     13    -33     .34
       JPL  |   1 |    1.8    7.1    7.7     -63    -33     -7    -.07
       MIT  |   1 |    7.9    9.6    1.9      -2     -3    -42     .10
       NGS  |   1 |     .0    1.9     .1       9      0      2     .51
       SIO  |   1 |    5.4    7.0  -20.6     170   -171    298     .05

       COD  |   2 |   -2.4    -.1   -2.5     -41     12     -9     .32
       EMR  |   2 |    3.5    3.6    9.5      71     31     14     .01
       ESA  |   2 |    6.3    9.4    7.7       9    -31     65    -.04
       GFZ  |   2 |     .3    -.7   -1.2     -32    -43     -5     .04
       GRG  |   2 |    8.1    7.2  -16.0     -13     21     -3     .52
       JPL  |   2 |    6.3    5.4   14.8     -41     13     36    -.12
       MIT  |   2 |    6.4    5.8    4.4       5     21    -45     .39
       NGS  |   2 |   -3.5    5.8   -2.5      25     12     -3     .51
       SIO  |   2 |    5.9    5.5  -25.5      95   -178    370     .33

       COD  |   3 |   -2.1    -.1   -2.9     -47     -2     26     .23
       EMR  |   3 |    7.0    6.6    4.9      62     32      4    -.19
       ESA  |   3 |    3.6   11.2    7.8       5    -29     69    -.13
       GFZ  |   3 |     .5     .6   -1.7     -34    -47      7    -.16
       GRG  |   3 |    4.7    5.7  -21.5     -14     20    -23     .70
       JPL  |   3 |    1.1    9.2   11.2     -60    -57    -10     .07
       MIT  |   3 |    9.1    5.7    5.1     -45      4    -86     .08
       NGS  |   3 |    2.9    3.2     .6      15    -18     19     .47
       SIO  |   3 |    5.9    3.6  -36.4      28   -203    237     .04

       COD  |   4 |   -1.8     .1   -1.5     -48      2      8     .15
       EMR  |   4 |    2.4    7.4    5.7      54     36     -1    -.22
       ESA  |   4 |    5.1   10.6    3.4      27    -25     75    -.18
       GFZ  |   4 |     .2     .4   -1.2     -29    -46     -7    -.16
       GRG  |   4 |    7.1    5.5  -19.1      10      0     16     .56
       JPL  |   4 |    5.0    8.9    8.9     -42    -57     13     .17
       MIT  |   4 |    6.0    6.3    2.1     -16     -4    -34     .32
       NGS  |   4 |    -.6    5.8    1.5      21      1      5     .50
       SIO  |   4 |    1.8    3.7  -17.3      59   -124    168     .20

       COD  |   5 |   -2.5    -.2   -1.4     -40     29     14     .10
       EMR  |   5 |    4.9    6.0    7.4      34     11     -5    -.03
       ESA  |   5 |    3.4    9.1    7.9      36    -58     68    -.10
       GFZ  |   5 |     .2     .2    -.6     -34    -42     -6    -.22
       GRG  |   5 |    8.1    8.4  -15.4       1      0     23     .46
       JPL  |   5 |    4.6   11.8   13.8     -87    -44     -8     .38
       MIT  |   5 |    8.5   11.4    1.1      34     -6    -36     .30
       NGS  |   5 |     .7    8.3   -1.0      49     -7     18     .58
       SIO  |   5 |    4.7    6.3  -32.6      -3   -221     28     .19

       COD  |   6 |   -3.5    -.8   -2.0     -66     34     19     .16
       EMR  |   6 |    2.8   12.3    3.8      43     39    -16    -.24
       ESA  |   6 |    4.3    9.2    1.0      51    -38     66    -.11
       GFZ  |   6 |     .4     .3    -.6     -17    -36     -4    -.32
       GRG  |   6 |    7.7   11.1  -14.5      -7    -15     -4     .44
       JPL  |   6 |    2.4   11.0    6.8     -26     62      3     .06
       MIT  |   6 |    8.6    7.4     .1      12     -7    -47     .38
       NGS  |   6 |    2.6    3.9   -2.4      32    -13     18     .58
       SIO  |   6 |    8.0    4.5  -29.0      16   -174    -20     .12


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

11. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) the absolute antenna model is introduced (IGSMAIL
    #5438). The antenna phase center offsets and phase center variations are given
    in the file:
        ftp://igs.org/igscb/station/general/igs05.atx
    These antenna calibrations are also used in the homogeneously reprocessed IGS
    products from GPS Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) the absolute antenna
    model is updated (IGSMAIL #6255 & #6374) as given in the file:
        ftp://igs.org/igscb/station/general/igs08.atx
    
    The JPL solution did not use IGS08/igs08.atx until GPS Week 1649, which caused
    their RMS clock residuals to be higher during that period than for the other
    centres; from GPS Week 1632 through 1648 the JPL solution is excluded from the
    weekly SINEX combination.


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 1.1771.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1771.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 2.1771.[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 3.1771.[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 5.1771.0-6). 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 1771 summary.                       (Dec 15, 2013 - Dec 21, 2013)

Table 1.1771.a   GPS week: 1771   MJD: 56641.000-56647.000

         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  254|    1     1     5   -12    24    -2   .08   11   10 |   -1168      22     20    128
        |    0     0     2    17    24    18   .03           |     212     375
emr   79|   -1    -1     5   -36    14   -17   .08   16   16 |    3609      17     21    113
        |    1     0     1    16    14    10   .01           |     678     595
esa  150|    0     0     0    20   -18    33  -.22    6    5 |   -1004     666     14    131
        |    0     0     0    21    13     9   .02           |    1585    1686
gfz  192|   -1     0    -2    -9   -14     0   .15   11    9 |     -81     167     16    155
        |    0     0     1    14     7    15   .01           |     429     704
grg  185|    2     0    -8     2     0    -6   .32   15   15 |    -189      61     20    258
        |    1     0     1    16    15    24   .06           |     172     372
igr  n/a|    0     0     1   -18    27    -8  -.18    5    4 |    4922     288     17     88
        |    0     0     0    12     9     9   .02           |     792     659
jpl   80|   -1    -2     2    21     2   -11   .10   14   14 |    2863      31     18    140
        |    0     0     2    23    12    31   .03           |     572     693
mit  296|    1     0    -2    15   -28   -15  -.17   14   12 |    -339     359     26    275
        |    0     0     1    31    19    18   .02           |     269     513
ngs  234|    0     0     0   -32    39   -35   .12   11   10 |   -1100      -2   1668   3321
        |    1     1     4    55    19    16   .02           |     193     400
sio  433|    0     0     3    37  -151   196  -.70   17   17 |     ---     ---    ---    ---
        |    0     0     0    71    25   174   .04           |     ---     ---


Table 1.1771.b   GPS week : 1771   MJD: 56641.000-56647.000   

         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    5    4    4    4    4 |
   2  |    4    5    4    4    5    4    4 |
   3  |    5    7    5    5    6    5    4 |
   4  |    3    3    4    5    3    3    3 |
   5  |    5    4    4    4    5    4    4 |
   6  |    5    5    6    6    6    6    5 |
   7  |    4    4    5    4    4    4    4 |
   8  |    3    3    3    3    3    3    4 |
   9  |    3    3    3    3    3    3    4 |
  10  |    3    3    3    4    4    3    4 |
  11  |    5    4    5    5    4    4    6 |
  12  |    5    5    5    5    6    5    5 |
  13  |    4    3    4    4    4    4    3 |
  14  |    4    4    4    4    4    4    3 |
  15  |    5    5    5    5    5    5    6 |
  16  |    5    5    5    5    5    5    5 |
  17  |    5    5    5    5    5    4    5 |
  18  |    5    4    4    5    5    5    4 |
  19  |    5    5    5    5    5    5    5 |
  20  |    4    4    4    4    4    4    4 |
  21  |    4    4    4    5    4    4    4 |
  22  |    4    5    4    4    4    4    3 |
  23  |    4    4    4    4    4    5    5 |
  24  |    4    4    4    5    4    4    4 |
  25  |    4    4    4    4    4    4    4 |
  26  |    8    6    7    6    5    5    5 |
  27  |    5    6    5    6    6    5    6 |
  28  |    4    4    4    5    4    4    4 |
  29  |    5    4    5    5    5    4    5 |
  30  |   44   22    0  ---    0    0    0 |
  31  |    5    4    4    5    5    4    4 |
  32  |    4    4    4    4    3    3    4 |



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1771.0   GPS week: 1771   Day: 0   MJD: 56641.000                            

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     1     5   -17     0     4   .06   10   10 |   -1509     418     19    122
emr   80|    0     0     7   -30     5    -4   .08   16   16 |    3701    -238     19    123
esa  150|    0     1     0    45    -1    20  -.23    6    5 |    1226   -1580     11    128
gfz  194|   -1    -1    -2   -12   -19    -2   .15   10    8 |    -142     561     16    128
grg  185|    2     0    -8   -27    -6     1   .28   14   14 |    -300     293     17    138
igr  n/a|    0     0     2   -18    39     1  -.17    5    4 |    3953     675     16     85
jpl   80|    0    -2     7     9    -1    -4   .14   15   13 |    2927     165     15    128
mit  299|    2    -1     0   -24   -22   -13  -.20   16   13 |    -627     864     30    242
ngs  240|    0     0   -10   -35    39   -41   .09   12   10 |   -1500     422   1671   3271
sio  453|    0     0     4    28  -116   418  -.75   18   17 |     ---     ---    ---    ---

Table 2.1771.1   GPS week: 1771   Day: 1   MJD: 56642.000                            

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     4   -18    75   -12   .09   10   10 |   -1119    -178     18    136
emr   80|    0     0     8   -26     8   -12   .10   16   16 |    3412    -286     19    142
esa  150|    0     0     0    10   -31    40  -.22    5    5 |   -2429    2347     10    137
gfz  196|   -2     0    -3    -8   -21   -19   .15   12    9 |    -237     328     14    136
grg  187|    1     0    -6     2   -20   -49   .34   14   13 |    -372     595     18    353
igr  n/a|    0     0     1   -24    21   -16  -.17    5    5 |    4662     284     15     80
jpl   80|    0    -1     2    -7    11    39   .09   14   13 |    3205    -319     17    160
mit  297|    1     0    -2    30   -28   -11  -.18   15   12 |    -401     796     22    305
ngs  239|    0     0    -2    -3    24   -35   .12   11    9 |   -1034    -113   1495   3562
sio  452|    0     0     3   157  -148   292  -.73   17   18 |     ---     ---    ---    ---

Table 2.1771.2   GPS week: 1771   Day: 2   MJD: 56643.000                            

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  258|    1     0     4   -14    31   -23   .10   11   11 |   -1137      82     19    140
emr   80|    0    -2     6   -21    38   -31   .08   16   16 |    2942    -432     18    112
esa  150|    0     0     0    -6    -1    21  -.23    5    5 |     622    -820      9    145
gfz  193|    0     0    -3    -5   -19    15   .16   11    9 |     107    -319     17    348
grg  184|    3    -1   -10    11   -12   -11   .36   15   14 |    -117    -167     21    402
igr  n/a|    0     0     2    -4    21   -18  -.18    4    4 |    4701    -291     16     92
jpl   80|   -1     0     0    54    -7    12   .06   15   15 |    2801    -718     18    182
mit  299|    1    -1    -2    50   -37   -24  -.15   14   11 |    -181     158     22    314
ngs  236|   -2     2     0   -31    10   -14   .14   11    9 |    -913    -310   1539   3301
sio  443|    0     0     3    95  -168   353  -.71   17   16 |     ---     ---    ---    ---

Table 2.1771.3   GPS week: 1771   Day: 3   MJD: 56644.000                            

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|    2     1     7     0    12    27   .02   11   11 |   -1026     241     21    155
emr   78|    0     0     4   -34     5   -13   .09   16   16 |    2823     947     18    122
esa  150|    0     1     0    -1   -24    42  -.25    7    7 |   -2235    1882     14    173
gfz  191|    0    -1    -3   -20   -12    25   .15   11   10 |    -391    1092     18    191
grg  183|    1    -1   -10    13    20   -13   .32   16   16 |    -159     301     19    479
igr  n/a|    0     0     2   -17    23     4  -.20    5    5 |    4349    1107     19    109
jpl   80|   -1    -2     2     5    -6    -7   .12   15   14 |    2010     985     17    162
mit  298|    1     0    -2   -19    -2   -49  -.17   13   11 |     -37      46     25    305
ngs  235|    0     0     0    64    37   -65   .16   11   10 |   -1092     599   1744   3383
sio  403|    0    -1     4     0  -165   219  -.69   17   15 |     ---     ---    ---    ---

Table 2.1771.4   GPS week: 1771   Day: 4   MJD: 56645.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  250|    1     1     6     9     7     0   .08   10   10 |   -1379     248     19    116
emr   80|   -2    -1     3   -24    24   -31   .07   16   16 |    3682     351     21     96
esa  150|    0     1     0    29   -18    33  -.22    6    6 |      77    -923     12    129
gfz  190|   -2     0    -1   -33   -18     4   .15   11   10 |     621    -977     13     71
grg  186|    4     0   -11    23    11     6   .25   16   16 |     -75       7     17    130
igr  n/a|    0     0     2   -22    15    -6  -.20    5    5 |    5262     402     21     78
jpl   80|    0    -2     0    45    25   -32   .11   14   14 |    2800     366     17    126
mit  299|    2     0    -4    38   -55     0  -.19   12   12 |    -722     671     28    230
ngs  231|    0    -1     4  -101    40   -24   .12   11   10 |   -1139     -39   1581   3035
sio  400|    0     0     2    51  -122   136  -.74   17   17 |     ---     ---    ---    ---

Table 2.1771.5   GPS week: 1771   Day: 5   MJD: 56646.000                            

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|    0     1     3    -5    22   -20   .09   10    9 |   -1136      62     19     96
emr   80|    0    -2     5   -63    -2   -21   .06   16   16 |    4871    -727     17     94
esa  150|    0     0     0    49   -34    37  -.22    5    5 |   -1875    2034     31    106
gfz  193|   -1     0     0     7    -3    -4   .17   10    8 |     177    -197     15    122
grg  187|    2    -2    -7     3    12    32   .29   15   15 |      83    -544     24    159
igr  n/a|    0     0     1    -1    39   -18  -.15    4    4 |    6418    -843     16     73
jpl   80|   -2    -2     2     4     4   -48   .11   14   13 |    3837    -875     19    103
mit  299|    1     0    -2    -7    -9     7  -.16   12   11 |    -364     552     26    263
ngs  231|    0     0     2   -91    70   -26   .13   11   10 |   -1071     -18   1593   2953
sio  456|   -2     1     4   -57  -188     3  -.66   17   19 |     ---     ---    ---    ---

Table 2.1771.6   GPS week: 1771   Day: 6   MJD: 56647.000                            

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|    1     2     9   -43    24     8   .09   13   13 |    -875    -717     27    131
emr   80|   -2    -1     3   -52    19    -7   .06   15   15 |    3836     509     38    103
esa  150|    0     0     0    15   -13    41  -.20    5    5 |   -2414    1724     11    102
gfz  193|    0     0    -2     7    -4   -13   .16   12   11 |    -705     681     19     93
grg  185|    1     0    -6    -8   -11    -8   .41   15   14 |    -386     -57     29    148
igr  n/a|    0     0     1   -38    29    -7  -.18    5    5 |    5111     686     18    104
jpl   80|   -1    -2     2    37    -8   -41   .08   14   13 |    2464     613     26    123
mit  282|    2     0    -3    40   -45   -16  -.16   13   11 |     -47    -569     35    267
ngs  229|    0    -1     1   -29    54   -38   .09   10    9 |    -951    -560   2054   3747
sio  427|    0     0     2   -11  -148   -46  -.63   18   17 |     ---     ---    ---    ---

       
       
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 3.1771.0   GPS week: 1771   Day: 0   MJD: 56641.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    9   13    4   10   10    4   18   17   11   22    4 |    39   37   41   45   48   39   50   43   44   38    42
   2  |   10   12    5   16   13    5   13   15    7   30    4 |    24   26   28   41   29   28   28   33   31   29    28
   3E |   11   16    7   12   14    8   13   20   12   24    4 |    84   82   78   79   83   81   84   86   81   85    81
   4  |    7    8    5    7   11    5    9   11    9   15    3 |    29   31   33   37   38   29   33   33   33   30    33
   5  |   14   17    6    8   14    6   15   13   10   23    4 |    41   45   39   36   38   37   42   39   39   41    38
   6  |   10   12    5   12   13    6   10   24   14   19    4 |    45   46   46   43   44   45   50   52   49   42    46
   7  |   11   16    5    8   16    4   11   18    8   12    4 |    27   21   18   20   28   16   23   18   22   12    19
   8  |    7   11    5    6   10    5   11   10    8   12    3 |    22   23   16   19   23   17   24   21   20   15    19
   9  |    6    9    6    9    8    4   10   13    8   16    3 |    22   23   17   19   21   17   24   26   19   17    19
  10  |    7    9    5    7   10    3    8   12    6   22    3 |    29   27   28   34   34   27   31   35   31   30    30
  11  |   10   20    7    9   14    3   13   15   13   13    4 |    57   59   59   63   71   58   65   61   63   59    61
  12  |   10   21    5   10   17    5   18   11   11   15    4 |    22   20   15   25   29   14   22   18   18   14    17
  13E |    8   11    3    7   17    2   13   13    9   14    3 |    30   30   21   26   36   21   26   26   26   18    25
  14E |   13   14    6    6   11    3   14   15   12   12    4 |    20   17   19   23   21   17   22   24   19   19    18
  15E |   10   23    6    9   12    5   23   18   12   23    5 |    26   27   21   29   27   22   27   23   30   21    23
  16  |   13   19    5   13   15    4   16   20   12   17    5 |    22   21   16   21   21   15   22   25   23   13    17
  17  |   13   20    5    8   16    3   17   11    9   10    4 |    21   24   16   21   31   15   26   17   20   11    18
  18  |   11   15    6   21   18    4   16   13   15   20    5 |    25   28   31   45   41   28   28   35   26   24    30
  19  |   10   22    7   13   19    3   15   11   13   10    5 |    17   28   16   25   26   16   21   19   25   15    18
  20  |   11   13    6   13   10    3   12   16   10   24    4 |    37   38   37   37   44   36   44   38   38   33    38
  21  |   10   12    5    7   14    4   12   15   13   28    4 |    27   24   26   24   33   23   26   29   20   27    24
  22  |    9   12    5    8   14    5   13   23   12   23    4 |    38   36   42   43   50   39   38   49   38   40    41
  23E |    6   16    5   10   14    4   16   17   10   13    4 |    26   24   23   29   23   23   28   22   27   18    24
  24  |    9   15    5    7   16    6   14   17   14   17    4 |    26   24   18   24   24   19   27   17   27   13    21
  25  |   10   16    5    9   13    3   13    9   15   12    4 |    19   22   14   17   22   13   24   14   20   12    15
  26E |   15   28    9   14   15    9   24   37   27   23    7 |    81   94   76   77   83   76   90   86   83   67    80
 X27  |   10   15    4   11  ---    3   11   17   12   16    4 |    29   30   23   24  ---   23   29   28   26   26    24
  28  |    9   14    6    9   14    3   15   15   10   13    4 |    25   21   17   25   28   16   25   14   18   11    19
  29  |    9   17    5    8   18    4   17   12   13   14    4 |    23   23   15   22   27   15   20   20   20   18    18
 X30  |   36  ---  ---  ---  ---   43   54  ---  ---  ---   44 |    52  ---  ---  ---  ---   26   22  ---  ---  ---    28
  31  |   11   14    5   11   18    6   13   13   16   12    4 |    22   24   16   22   34   17   25   21   23   13    19
  32  |    9   12    5    8   14    3    8    9   16   15    3 |    20   20   20   25   29   20   28   22   23   26    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   16    6   10   14    5   15   16   12   18      |T   32   32   28   32   36   27   33   32   31   27    29
 WRMS |   10   16    5    8   14    4   13   13   10   17      |NE  28   28   25   29   33   24   29   28   27   23    26
 MEDI |   10   15    5    9   14    4   13   15   12   16      |MD  26   26   21   25   29   22   27   26   26   21    24

Table 3.1771.1   GPS week: 1771   Day: 1   MJD: 56642.000                            

        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  |   13   13    6   15   11    5   17   13    9   16    4 |    25   26   20   27   31   24   36   24   25   23    23
   2  |   10   13    4   25   12    5   13   12    8   28    4 |    21   26   24   43   25   24   25   27   24   25    24
   3E |   15   24   14   17   28    4   21   16   13   19    6 |    94   93   92   91   97   93   93   91   95   94    92
   4  |    7    9    3    9   11    4   12    9    5   14    3 |    27   26   26   34   29   25   29   25   27   24    27
   5  |   12   15    6    9   11    6   15   11    8   22    4 |    26   30   22   23   27   21   30   23   25   25    22
   6  |   12   13    5   14   17    3   15   18   13   19    4 |    39   42   39   38   40   39   45   42   46   40    39
   7  |   10   16    4   10   14    4   13   17   12   10    4 |    22   21   13   15   25   14   21   19   22   14    16
   8  |    6   10    3    5   10    4   11   12    9   11    3 |    18   20   13   16   19   15   20   21   19   16    16
   9  |    5   10    5    8    9    3   10   11    9   14    3 |    19   20   14   15   18   14   21   21   19   16    16
  10  |    8   10    4    9   10    5    7    9    8   20    3 |    19   20   18   24   23   17   20   23   17   22    19
  11  |    9   17    5   12   15    5   13   11   11    8    4 |    37   42   39   42   49   37   46   40   41   37    39
  12  |   12   18    5   15   15    5   19   13    9   15    4 |    20   21   13   24   27   13   21   18   20   13    16
  13E |    7   11    4    7   12    2   11   11   11   14    3 |    29   28   20   27   27   21   27   26   27   23    24
  14E |   12   13    4    7    9    5   10   13   12   13    3 |    22   20   18   23   20   19   21   20   24   19    18
  15E |   12   23    5    9   14    5   20   12    8   18    4 |    33   39   29   35   34   31   32   32   38   30    31
  16  |    9   17    5   15   15    4   16   20   12   16    4 |    23   23   18   23   23   18   23   27   20   14    18
  17  |   12   22    5   10   14    4   16   10   10    7    4 |    20   25   13   21   28   13   21   16   21   11    16
  18  |   13   14    5   17   12    5   14   12   10   18    4 |    19   25   21   35   26   19   23   24   23   17    22
  19  |   11   22    4   12   22    3   13   11    8   12    4 |    23   26   18   21   26   17   20   23   23   17    18
  20  |   12   16    7   11   10    3   14   17    7   23    4 |    27   31   27   28   31   24   34   26   27   21    26
  21  |   10   12    4    8   12    5   12   14   13   28    3 |    17   22   17   19   24   16   22   22   18   23    17
  22  |   10   14    4    9   15    6   11   34   10   31    5 |    36   38   37   39   39   36   39   44   39   41    36
  23E |    4   21    5   11   13    3   16   15   12   16    4 |    20   24   15   23   22   16   22   18   23   17    17
  24  |    7   14    5    8   12    7   16   10   13   16    3 |    20   23   15   19   23   16   24   16   21   14    17
  25  |    8   17    5    7   11    4   12    9   12   14    3 |    19   26   15   18   23   16   23   15   20   12    17
  26E |   15   27    7   14   11    6   18   29   20   15    6 |    67   79   65   69   72   66   77   71   72   59    68
 X27  |   14   19   12   16  ---   14   16   12   19   19    6 |    37   29   33   20  ---   21   30   29   26   24    27
  28  |    9   16    6   10   15    3   12   14    7   10    4 |    20   22   12   19   27   13   22   15   17   13    15
  29  |   10   18    6    9   15    4   17   14    8   15    4 |    22   24   14   20   26   14   21   18   20   15    17
 X30  |   19  ---  ---  ---  ---   36   26  ---  ---  ---   22 |    44  ---  ---  ---  ---   33   18  ---  ---  ---    33
  31  |   11   14    5   10   15    8   12   10   13   12    4 |    24   25   15   23   32   20   22   17   25   13    19
  32  |    9   13    5   11   12    3   10   11    9   18    3 |    18   17   14   18   18   13   19   17   15   20    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   16    5   12   14    5   14   15   11   17      |T   28   30   24   28   31   24   29   27   28   24    25
 WRMS |   10   16    5    9   13    5   13   12    9   18      |NE  24   25   19   24   26   19   25   22   23   19    21
 MEDI |   10   15    5   10   12    4   13   12   10   16      |MD  22   25   18   23   26   19   23   23   23   20    19

Table 3.1771.2   GPS week: 1771   Day: 2   MJD: 56643.000                            

        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  |   13   13    6   16   14    4   22    9    9   22    4 |    31   32   29   33   43   31   43   33   33   32    31
   2  |   13   11    4   19   15    5   12   11    8   27    4 |    29   26   23   34   29   24   23   31   31   27    26
   3E |   11   16    6   11   20    8   19   17   15   15    5 |    57   65   57   59   64   60   60   55   65   60    58
   4  |   11    7    4    9   13    3    8   10   13   14    3 |    26   28   26   30   33   26   26   29   30   26    27
   5  |   15   16    5    9   12    5   14   10    7   22    4 |    34   38   29   28   31   28   32   31   34   32    30
   6  |   13   23    5   13   18    5   16   18   18   18    5 |    39   50   43   44   39   42   44   40   50   39    42
   7  |   12   18    4   11   16    3   13   13   13   10    4 |    21   23   12   16   25   13   20   17   21   11    15
   8  |    6   10    4    6   12    3    9   10    8   10    3 |    18   22   16   17   17   16   21   18   21   15    17
   9  |    5   10    4    9   11    3    8   13    8   13    3 |    17   22   14   16   16   14   19   20   19   15    15
  10  |    5   10    5    8   14    3    9   11   11   20    3 |    23   24   23   28   29   20   24   29   26   25    24
  11  |   12   18    7   12   19    3   17   10    9   11    4 |    44   49   46   48   61   45   53   47   48   45    47
  12  |   11   22    4   14   17    3   20   15    8   14    5 |    20   22   14   25   28   14   22   18   21   13    16
  13E |   10   12    7    8   15    2   11   15   11   17    4 |    25   26   21   23   30   18   26   20   21   13    21
  14E |   14   13    5    6   11    4   13   14    5   11    3 |    20   21   18   23   20   16   17   22   19   17    17
  15E |   10   23    5    8   15    2   20   14   10   17    4 |    32   31   25   28   28   25   30   28   27   28    25
  16  |   13   16    6   10   15    6   19   20   10   16    4 |    24   23   17   21   20   15   23   27   23   13    17
  17  |   12   21    6    7   18    3   18    9   14    7    4 |    21   27   15   19   27   16   24   15   26   12    17
  18  |   12   13    4   17   13    3   12   13   10   19    4 |    18   26   23   36   30   21   26   27   25   22    23
  19  |    9   20    5   15   23    4   15   15    9   14    4 |    15   24   14   23   28   15   17   21   18   16    15
  20  |   10   12    6   10   11    4   14   15    9   23    4 |    30   32   30   28   37   30   35   32   34   26    30
  21  |   11   14    3    8   14    6   13   13   12   27    3 |    17   24   18   21   28   18   23   23   23   23    18
  22  |   12   12    5    7   14    4   11   11   11   16    3 |    30   35   32   37   41   29   35   33   34   30    33
  23E |    9   17    6    9   15    3   17   13    8   15    4 |    19   18   12   21   20   12   18   16   18   12    14
  24  |    8   14    5    7   11    5   13   11   11   19    3 |    22   24   20   20   22   18   22   16   27   14    19
  25  |    9   16    6   11   12    3   13   10    9   14    3 |    18   24   17   16   21   15   21   15   23   12    16
  26E |   12   24    8   19   15    6   20   31   14   13    6 |    71   84   68   72   76   68   82   73   75   61    72
 X27  |   11   16    5   14  ---    7   14   16   14   15    4 |    24   25   22   20  ---   18   27   26   26   23    21
  28  |    7   15    5   10   15    3   16   12    9   11    4 |    19   23   13   16   28   12   22   15   21   11    15
  29  |   10   22    6    9   17    5   20   13    9   14    4 |    19   24   13   19   25   13   21   15   19   12    14
 X30  |    4  ---  ---  ---  ---  146  ---  ---  ---  ---    0 |    74  ---  ---  ---  ---   50  ---  ---  ---  ---    76
  31  |   13   15    6    8   18    5   16   12    7   12    4 |    24   25   16   23   32   18   22   19   25   16    19
  32  |   10   10    5    7   14    4   10   10   10   17    3 |    18   17   16   20   23   14   20   19   16   23    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   16    5   11   15    4   15   14   11   17      |T   28   30   23   27   31   24   28   26   29   23    26
 WRMS |   11   16    5    9   14    4   15   11    9   16      |NE  25   26   20   24   29   21   25   24   26   20    23
 MEDI |   11   15    5    9   15    4   14   13   10   15      |MD  23   25   20   23   28   18   23   23   25   22    19

Table 3.1771.3   GPS week: 1771   Day: 3   MJD: 56644.000                            

        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  |   13   10    4   15   12    5   16    8   11   15    4 |    31   35   34   33   42   32   42   35   34   32    34
   2  |    9   13    6   18   17    5   13   11    7   28    4 |    31   36   38   48   37   37   37   37   37   35    36
   3E |   12   12    5   11   24    7   16   20    7   19    5 |    87   84   81   83   86   83   83   86   86   87    83
   4  |   15   12   17   12   11    5   10    8   11   17    5 |    32   36   43   41   40   32   34   34   35   28    36
   5  |   11   16    6   13   17    6   15   10    8   21    4 |    41   42   36   33   33   34   42   36   34   39    36
   6  |   10   13    6   13   25    4   20   24   15   26    5 |    62   67   62   62   62   58   69   65   58   66    61
   7  |    9   18    4    9   16    4   14   13    8   11    4 |    23   25   15   17   27   17   20   19   25   14    18
   8  |    7   12    5    7   13    3   10   10    8   11    3 |    19   26   16   18   24   16   20   22   21   17    19
   9  |    6   10    5    7   11    4    9   10    7   14    3 |    19   24   16   15   22   17   20   21   19   18    18
  10  |   11   11    7   12   14    4    9    8   12   17    3 |    31   29   28   38   32   26   30   33   24   28    29
  11  |   13   17    5   11   17    4   14    9   13   10    4 |    47   56   51   55   63   49   58   51   47   49    52
  12  |   11   21    7   11   17    6   17   16   10   15    5 |    17   26   18   23   28   15   24   21   20   16    18
  13E |    8   11    5    6   17    4    9   14    7   15    3 |    24   23   18   21   27   17   21   24   20   16    20
  14E |   15   11    6    7   13    4   10   13   12   12    4 |    26   24   22   24   21   20   19   24   22   19    21
  15E |   10   24    7   10   15    6   19   12   17   17    5 |    27   37   24   29   29   24   30   30   38   25    28
  16  |   12   15    6   11   17    6   19   17    8   15    4 |    22   23   17   20   23   15   24   25   21   14    18
  17  |   15   21    6    8   16    4   18   10   11   10    4 |    27   29   22   30   34   20   29   23   32   19    25
  18  |    9   15    6   23   17    3   14   12   11   20    5 |    23   28   25   45   32   25   25   31   26   22    27
  19  |   10   21    4   11   22    4   15   12   12   16    4 |    18   24   15   17   25   13   18   20   22   17    15
  20  |   12   12    6    9   11    4   13   12   14   22    4 |    29   33   31   31   37   27   34   31   30   27    30
  21  |    9   13    7    9   14    4   15   15   16   28    4 |    15   25   23   26   31   21   23   24   25   25    21
  22  |   11   12    6    9   14    5   10   12    9   15    3 |    28   33   33   36   40   33   36   41   32   33    33
  23E |    9   16    7   10   12    3   14   13    8   13    4 |    19   22   18   22   24   16   22   20   20   15    17
  24  |    8   16    7   10   13    5   15   12   15   19    4 |    23   26   21   25   25   19   26   20   27   21    22
  25  |    9   16    7    8   11    6   17    9    7   13    4 |    17   27   18   18   22   16   28   19   17   14    18
  26E |   11   22    8   15   16    5   18   24   16   10    6 |    74   90   71   76   80   73   83   73   77   65    75
 X27  |   17   17    6   15  ---    9   17   17   13   20    5 |    35   28   23   20  ---   18   29   26   22   26    23
  28  |    9   17    6   13   17    6   14   13   11   13    4 |    20   28   16   20   31   16   23   20   21   15    18
  29  |    8   21    7    7   15    5   20   12   12   12    4 |    19   28   18   20   26   16   26   20   19   14    18
  31  |   15   17    7    9   21    8   16   12   15   17    5 |    26   26   18   24   34   17   24   19   25   16    20
  32  |   10   11    5   11   16    4    9    9   12   19    3 |    18   21   16   20   23   13   20   17   14   21    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   16    7   11   16    5   15   13   11   17      |T   30   34   28   31   35   26   32   31   30   27    29
 WRMS |   11   16    7   10   16    5   14   11   10   15      |NE  25   29   24   28   31   22   28   26   26   23    24
 MEDI |   10   15    6   11   16    5   15   12   11   15      |MD  26   28   22   25   31   20   26   24   25   21    22

Table 3.1771.4   GPS week: 1771   Day: 4   MJD: 56645.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   10   10    4   14   10    4   18    9    7   14    3 |    22   31   28   27   36   25   41   31   25   26    28
   2  |   11   13    6   24   15    4   14   12   10   27    5 |    23   25   24   38   25   21   25   27   28   22    24
   3E |   13   19   17   16   25    4   17   13   11   16    6 |    45   42   47   34   39   38   43   44   43   36    41
   4  |   10   10    5    8   14    5    9    8   10   15    3 |    22   26   27   31   31   25   26   29   29   23    26
   5  |    8   16    6   12   16    4   16   11   12   22    4 |    35   41   34   33   33   33   36   33   40   35    33
   6E |   15   22    9   16   24   12   19   13   16   29    6 |   100   99   99   95   95   97  101  101  100  100    98
   7  |   11   18    4   10   16    2   12   13    8   13    4 |    20   22   13   19   25   14   18   16   23   12    16
   8  |    8    9    4    7    9    5   11   14    8   11    3 |    22   25   19   20   23   20   24   23   24   18    21
   9  |    7    8    6    9   10    6   10   13    7   13    3 |    20   22   17   18   19   17   22   20   21   16    18
  10  |    5    8    4   10   14    4    8   11   12   19    3 |    23   24   22   31   31   22   25   29   22   26    24
  11  |   11   14    4   11   17    4   12   10   10    8    4 |    40   51   43   48   57   43   51   46   42   43    45
  12  |   14   21    6   14   20    6   19   16   11   14    5 |    18   24   15   23   28   14   22   20   25   14    17
  13E |    9   20    6    7   19    5   10   14    8   18    4 |    30   38   25   28   35   25   29   30   28   26    27
  14E |    9   11    5    7    8    3   10   12   12   11    3 |    18   21   20   20   19   18   19   21   27   21    18
  15E |   10   23    7   10   12    4   18   14   14   16    5 |    37   41   32   32   33   32   34   36   40   34    33
  16  |    8   19    7   11   22    4   15   16   11   16    5 |    22   23   19   19   24   15   22   26   26   12    19
  17  |    8   19    6   10   18    5   17   10   10    7    4 |    21   25   15   21   29   15   24   20   22   15    18
  18  |   11   15    7   18   15    3   12   11   12   18    4 |    25   29   23   36   30   22   26   27   24   21    24
  19  |   10   17    7   12   21    6   12   15   14   12    4 |    18   25   20   27   25   16   20   22   26   12    19
  20  |   11   11    6   10   11    5   11   14    8   24    3 |    30   33   29   29   35   29   35   32   30   27    29
  21  |    8   14    6    9   10    5   12   13   10   28    3 |    20   23   19   20   28   19   22   23   20   26    19
  22  |    9   12    5    8   13    4   10   13   11   17    3 |    27   28   27   25   36   25   30   30   24   25    26
  23E |    9   24    6   10   14    4   13   11    8   11    4 |    23   24   16   22   22   17   20   19   22   17    17
  24  |    7   16    6    8   14    5   14   11   13   19    4 |    21   24   17   19   25   17   23   19   23   17    18
  25  |    9   16    6   11   15    3   13   10   11   12    4 |    17   25   16   17   24   16   24   17   28   14    17
  26E |   11   22    6   11   17    5   18   12   13   11    5 |    72   83   67   74   79   68   81   68   71   63    72
 X27  |   13   20   14   16  ---    6   14   12   15   16    6 |    26   29   27   22  ---   19   26   25   28   23    23
  28  |    9   17    6    9   18    5   15   12   10   10    4 |    23   24   13   21   29   14   22   18   19   10    17
  29  |   10   22    6    7   12    4   16   14    9   13    4 |    24   28   17   20   26   16   21   18   25   16    19
 X30  |    4  ---  ---  ---  ---  ---  ---  ---  ---  ---    0 |  9999  ---  ---  ---  ---  ---  ---  ---  ---  ---  9999
  31  |   10   16    6   10   19    5   14    9   16   14    4 |    23   23   18   24   34   20   22   20   30   14    20
  32  |    9   10    5    7   11    4    9    8    9   16    3 |    15   17   14   18   22   14   21   19   15   21    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   16    6   11   16    5   14   12   11   17      |T   28   32   26   29   33   25   30   29   30   25    27
 WRMS |   10   16    6   10   16    5   14   12   10   17      |NE  23   26   21   25   29   20   26   24   25   20    22
 MEDI |    9   16    6   10   15    4   13   12   11   15      |MD  23   25   20   24   29   20   24   25   26   21    21

Table 3.1771.5   GPS week: 1771   Day: 5   MJD: 56646.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   10    4   11   12    4   15    7   11   15    3 |    29   32   29   31   34   26   41   29   26   27    29
   2  |   10   12    5   17   13    3   13   12    9   27    4 |    20   22   22   31   18   20   23   23   17   17    20
   3E |   10   15    9   10   21    4   17   12   12   12    4 |    73   70   73   73   75   73   72   73   77   74    73
   4  |    6    9    4    5   12    5    9    7    9   16    2 |    26   24   24   29   22   22   26   23   22   18    24
   5  |    8   16    5   10   11    5   15   11   10   21    3 |    32   39   30   29   33   28   36   30   37   32    31
   6E |   14   23    7   15   21    8   23   14   15   22    5 |    63   72   64   66   68   64   68   63   72   68    65
   7  |   11   15    4   11   16    3   13   12   10   12    4 |    22   24   14   19   27   16   21   18   24   13    17
   8  |    9   10    5    7    9    4   10   12    9   10    3 |    23   21   17   19   16   17   20   20   21   14    17
   9  |    7    9    5    8    9    4    9   11   11   12    3 |    20   20   14   16   16   15   19   18   19   13    16
  10  |    7    9    4    9   11    3    8    9    8   18    3 |    26   22   22   29   23   23   25   30   26   26    24
  11  |    8   17    4   12   19    4   12   11   11   10    4 |    39   48   37   40   46   36   46   39   34   36    39
  12  |   10   19    6   11   17    6   19   19   13   17    5 |    20   24   14   22   30   13   23   20   25   14    17
  13E |   10   11    5    7   18    4   10   10    9   12    3 |    27   25   23   26   28   22   25   24   25   23    23
  14E |   15   11    7   10    9    3    9   11    8   10    3 |    23   25   27   32   26   24   28   22   23   22    24
  15E |   11   24    5   12   16    5   22   12   16   18    5 |    40   40   36   39   37   34   40   38   37   37    36
  16  |    7   20    4   12   16    3   20   14   13   16    4 |    19   24   15   22   23   15   24   22   22   11    17
  17  |    8   19    5    6   14    3   19   12   11   12    4 |    24   26   15   20   28   14   25   18   20   12    19
  18  |   10   14    5   18   15    2   13   11   14   20    4 |    24   28   23   41   28   24   29   25   26   17    25
  19  |    9   20    6   12   21    4   15   11   11   11    4 |    22   24   20   26   25   16   21   19   23   11    19
  20  |   11   10    5   11   10    5   13   15    9   22    3 |    32   30   28   26   30   28   33   30   30   23    28
  21  |   10   16    4    7   11    4   14   15   10   29    4 |    20   22   16   19   22   16   22   16   15   20    16
  22  |   10   12    3    8   13    3   11   10   11   15    3 |    29   33   31   35   39   30   36   30   29   29    31
  23E |   10   25    7   10   17    5   15   15    8   14    4 |    26   25   21   25   21   20   25   17   23   16    20
  24  |   11   15    5    7   14    4   14   13   14   20    4 |    27   25   17   20   27   18   24   21   28   18    21
  25  |    9   15    4    8   14    7   12    9   12   12    3 |    19   23   14   17   23   14   25   17   23   13    16
  26E |   11   23    6   11   11    6   18    9   15    9    4 |    72   81   66   70   73   68   81   67   73   60    70
 X27  |   11   15    8   12  ---    5   13   11   14   15    4 |    29   27   21   24  ---   21   28   21   25   23    22
  28  |    8   18    6   10   19    5   15   15    7   14    4 |    25   25   16   22   30   16   23   18   18   11    18
  29  |    8   20    4    9   12    4   18   12   11   13    4 |    24   24   14   22   23   14   26   17   17   11    17
 X30  |    3  ---  ---  ---  ---  133  ---  ---  ---  ---    0 |  9999  ---  ---  ---  ---   48  ---  ---  ---  ---  9999
  31  |    9   17    6    7   20    4   14   10   11   14    4 |    21   24   15   21   34   15   25   19   21   17    18
  32  |    7   12    4    8   10    4    6   11   10   19    3 |    21   20   18   20   22   17   23   22   18   21    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   16    5   10   15    4   14   12   11   17      |T   29   31   25   30   31   25   31   27   28   24    26
 WRMS |    9   16    5    8   15    4   13   11   10   19      |NE  24   26   20   25   26   20   26   22   23   18    21
 MEDI |    9   15    5   10   14    4   14   11   11   15      |MD  25   25   21   26   27   20   25   22   24   18    21

Table 3.1771.6   GPS week: 1771   Day: 6   MJD: 56647.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   12    9    5   17   13    6   15    8   11   19    4 |    32   37   35   41   49   36   45   38   39   34    37
   2  |   15   12    4   18   13    4   12   13    9   27    4 |    23   29   28   38   33   28   28   33   24   26    27
   3E |   12   11    4   11   12    4   13    8   13   15    3 |    89   91   88   88   89   90   86   89   87   89    88
   4  |   12   10    5    9   14    5    7    8    9   16    3 |    29   35   36   38   41   31   32   35   29   30    33
   5  |   16   18    6   11   11    4   15   11    7   22    4 |    45   47   40   40   41   40   46   38   43   43    40
   6E |   16   16    6   14   18    9   20   16   14   27    5 |   109  107  108  104  108  100  113  109   99  110   106
   7  |   17   15    5   10   15    3   11   15    7   11    4 |    26   23   17   20   27   16   21   18   23   12    18
   8  |   11   11    3    5   15    4   10   14   10   12    3 |    19   24   15   19   21   16   22   18   21   17    17
   9  |    9   11    4    6   14    4    9   14   11   13    3 |    17   22   14   18   19   14   21   17   17   17    15
  10  |   11    9    5   11   15    4    9   11    9   19    3 |    26   31   31   39   36   31   35   39   29   34    32
  11  |   13   18    8   13   21    4   14   25    9   27    5 |    53   63   57   63   74   56   63   64   58   61    59
  12  |   16   21    5   17   16    6   21   17    9   14    5 |    18   26   14   21   28   14   26   19   22   12    16
  13E |    9   10    5    8   13    4    7    8   10   13    3 |    31   31   28   33   33   27   33   33   29   26    29
  14E |    8   12    4    8   13    3   10    9    8   10    3 |    28   29   26   25   32   26   24   27   28   24    26
  15E |   20   23    6   15   15    9   23   16   11   24    5 |    82   96   88   84   87   82   93   90   86   94    87
  16  |   17   18    4   10   12    3   16   11   17   15    4 |    26   24   17   22   21   15   22   20   22   12    17
  17  |   15   18    5   10   19    3   20   11   12   10    4 |    23   25   15   21   32   15   25   20   25   15    18
  18  |   11   15    5   19   13    3   14   11    9   18    4 |    25   32   30   44   38   28   30   33   28   25    30
  19  |   15   17    5   16   22    4   13   10   12   11    4 |    19   23   13   24   29   14   17   15   22    9    15
  20  |   13   11    5   12   12    3   11   12   11   25    4 |    31   33   33   32   40   31   38   37   34   31    33
  21  |    8   14    5    7   13    4   13   17   14   30    4 |    24   29   25   28   38   24   27   27   26   29    25
  22  |    9   12    3   10   12    3   10    8    6   17    3 |    37   41   41   42   51   38   39   44   41   44    41
  23E |   11   21    6   11   13    4   13   14   10   13    4 |    24   22   17   22   23   16   20   19   22   16    17
  24  |   12   14    4    9   13    5   11   11    9   20    3 |    25   25   19   21   23   19   24   18   22   19    19
  25  |   10   13    5   11   11    3   12    9    9   12    3 |    17   23   17   14   23   15   24   18   19   12    17
  26E |   13   20    6   13   13    6   19    8   11   11    4 |    84   91   78   81   86   79   90   78   85   73    82
 X27  |   18   19    8   13  ---   10   15   14   16   15    5 |    54   39   41   42  ---   33   45   43   33   42    41
  28  |   10   14    7   11   14    4   15   13   11   13    4 |    21   24   13   23   27   14   22   20   21   14    17
  29  |   11   23    6   10   19    4   22   13   10   12    5 |    21   29   16   20   32   15   26   20   19   15    18
 X30  |    6  ---  ---  ---  ---   65  ---  ---  ---  ---    0 |  9999  ---  ---  ---  ---   27  ---  ---  ---  ---  9999
  31  |   13   16    4   11   16    8   13    8    8   15    4 |    26   24   15   23   34   18   21   18   23   17    19
  32  |   12   10    4   12   17    4   10   17    7   22    4 |    19   21   18   21   30   16   22   23   21   22    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   13   15    5   12   15    5   14   13   10   18      |T   35   38   33   37   41   32   38   36   35   33    34
 WRMS |   13   15    5   11   14    5   13   11    9   17      |NE  27   30   25   29   34   24   30   28   27   24    25
 MEDI |   12   14    5   11   13    4   13   11   10   15      |MD  26   29   26   28   33   26   27   27   26   25    26



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 4.1771   GPS week: 1771   MJD: 56641.0-56647.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3012 |U    5     6    18 |U    9    13    33 |U    7     6    15 |
emr | emr 2966 |     9     6    21 |U   10    11    30 |     8     9    21 |
esa | esa 2976 |     8     6    17 |U    9    12    29 |     7     6    17 |
gfz | gfz 2960 |U    9     6    22 |U    9    12    30 |U    7     7    17 |
grg | grg 2861 |U    9    11    29 |U   11    13    37 |U   11    13    26 |
igr | igr 2974 |     7     6    17 |     9    12    29 |     7     7    17 |
igs | igs 2937 |     7     6    19 |     9    12    30 |     8     7    17 |
jpl | jpl 2993 |     7     6    21 |U   10    13    32 |U    8     9    21 |
mit | mit 2976 |U    7     6    21 |U    9    14    38 |U    9    12    21 |



Table 5: Daily Precise Navigation Summary using the corresponding Centre orbit 
         positions and satellite clock corrections at 15 min intervals.

         Each line gives the daily station RMS w.r.t. the estimated coordinates 
         for the Latitude, Longitude and Height components.
        
         CLK  - Satellite clocks used.
         EPO  - Number of satellite clock epochs available for that day.
         Units: mm.

Table 5.1771.0   GPS week: 1771   Day: 0   MJD: 56641.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3033 |     5     7    19 |     9    16    28 |     8     7    16 |
emr | emr 2971 |     9     8    24 |    12    14    26 |     8     8    20 |
esa | esa 2976 |     8     8    20 |    10    14    29 |     8     9    17 |
gfz | gfz 2961 |     9     8    25 |     9    16    32 |     8     9    17 |
grg | grg 2859 |    10    15    30 |    10    17    36 |     9    10    26 |
igr | igr 2972 |     6     8    19 |     9    15    27 |     9    11    20 |
igs | igs 2970 |     7     7    19 |    10    14    28 |     8     9    18 |
jpl | jpl 3062 |     8     7    21 |    11    15    30 |    10    10    23 |
mit | mit 2976 |     8     9    25 |    10    16    30 |    11    14    25 |

Table 5.1771.1   GPS week: 1771   Day: 1   MJD: 56642.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3028 |     4     4    16 |     9    12    33 |     8     6    15 |
emr | emr 2967 |     8     5    20 |     9     9    37 |     9     9    17 |
esa | esa 2976 |     9     5    15 |     9    10    35 |     8     7    14 |
gfz | gfz 2963 |    19     6    24 |     9    11    35 |     8     7    16 |
grg | grg 2861 |     7     6    23 |     9    12    38 |    18    20    27 |
igr | igr 2974 |     8     6    15 |     9    11    36 |     8     7    13 |
igs | igs 2946 |     7     5    16 |     9    10    35 |     9     6    15 |
jpl | jpl 3058 |     6     4    18 |    10    12    39 |    10     8    16 |
mit | mit 2976 |     8     4    20 |     9    11    36 |    11    14    22 |

Table 5.1771.2   GPS week: 1771   Day: 2   MJD: 56643.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3010 |     4     3    13 |    10    13    33 |     9     6    15 |
emr | emr 2967 |     8     5    12 |    10    11    31 |    10    13    18 |
esa | esa 2976 |     7     4    11 |     9    13    33 |     9     7    17 |
gfz | gfz 2959 |     6     4    19 |    10    14    35 |     9     7    17 |
grg | grg 2858 |     9     8    23 |    10    15    46 |    10    12    22 |
igr | igr 2976 |     6     4    11 |     9    12    33 |     9     8    15 |
igs | igs 2926 |     5     3    11 |     9    12    32 |     9     8    16 |
jpl | jpl 2967 |     7     4    13 |    11    12    34 |     9    10    17 |
mit | mit 2976 |     6     5    13 |    10    11    34 |     9    16    22 |

Table 5.1771.3   GPS week: 1771   Day: 3   MJD: 56644.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     5    17 |    10    10    34 |     7     5    18 |
emr | emr 2968 |     9     5    17 |    10    11    33 |     7     8    25 |
esa | esa 2976 |     7     5    16 |     9    10    33 |     7     6    22 |
gfz | gfz 2958 |     7     5    16 |    10     9    32 |     7     6    21 |
grg | grg 2862 |    10    14    31 |    12     9    39 |    12    13    33 |
igr | igr 2976 |     6     5    15 |     9     9    34 |     6     5    19 |
igs | igs 2893 |     6     6    17 |    10    10    34 |     7     5    21 |
jpl | jpl 2968 |     7     7    18 |    10    10    34 |     8    10    24 |
mit | mit 2976 |     6     7    15 |     9     9    33 |     8     9    24 |

Table 5.1771.4   GPS week: 1771   Day: 4   MJD: 56645.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2973 |     7     9    29 |    10    12    33 |     6     5    12 |
emr | emr 2968 |     9     8    32 |     9    17    31 |     8    11    20 |
esa | esa 2976 |     8     8    29 |     9    13    29 |     7     5    17 |
gfz | gfz 2960 |     7     8    31 |     9    11    28 |     7     7    17 |
grg | grg 2864 |    12    11    37 |    11    15    42 |    11    14    23 |
igr | igr 2968 |     7     8    29 |     9    12    31 |     8     6    14 |
igs | igs 2944 |     7     8    30 |     9    11    30 |     7     7    15 |
jpl | jpl 2968 |     8    10    32 |    10    15    31 |     8    12    20 |
mit | mit 2976 |     8     9    28 |     9    20    34 |     9    14    21 |

Table 5.1771.5   GPS week: 1771   Day: 5   MJD: 56646.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3022 |     4     6    13 |    12    16    48 |     8     5    15 |
emr | emr 2963 |     8     7    14 |    10    10    28 |     7     7    20 |
esa | esa 2976 |     7     6    12 |     9    11    24 |     7     7    14 |
gfz | gfz 2962 |     9     6    18 |     9    12    31 |     7     7    15 |
grg | grg 2865 |     8     9    17 |    11    13    30 |    10    11    22 |
igr | igr 2976 |     6     6    12 |     9    11    24 |     6     7    14 |
igs | igs 2972 |     6     6    14 |     9    12    29 |     7     6    14 |
jpl | jpl 2964 |     5     5    14 |    10    13    29 |     7     9    19 |
mit | mit 2976 |     7     5    18 |     9    16    31 |     8     8    17 |

Table 5.1771.6   GPS week: 1771   Day: 6   MJD: 56647.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3043 |     7     6    18 |     7    12    21 |     6     5    16 |
emr | emr 2964 |    10     6    29 |    10     9    26 |     7     6    28 |
esa | esa 2976 |     8     6    18 |     7    11    21 |     6     6    19 |
gfz | gfz 2958 |     8     6    22 |     8    11    21 |     6     5    18 |
grg | grg 2864 |    11    12    40 |    11    11    27 |     8    10    26 |
igr | igr 2976 |     8     6    19 |     7    11    20 |     7     5    21 |
igs | igs 2909 |    10     6    27 |     8    13    21 |     7     9    22 |
jpl | jpl 2964 |     9     6    31 |     9    12    24 |     7     7    29 |
mit | mit 2976 |     8     6    25 |    10    17    71 |     7     6    18 |


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 6.1771   GPS week: 1771   MJD: 56641.500-56647.500

                                                         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 |     -13      -6     180      25     -8 |      10     13
            |      28      15      65      97      4 |       3
emr   uuuuu |     -31      49    -174     -73      1 |      17     19
            |      21      30     111      82      7 |       2
esa   uuuuu |       3     -16      63      48     -4 |       2      7
            |       9      15      63      73      3 |       2
gfz   uuuuu |      -7       4       6    -196     -3 |      15     18
            |      12      23     109      95      4 |       2
grg   uuuux |      19      13     -98      27      2 |       1      7
            |      10      10      44      36      7 |       2
igr   xxxxx |     -16      24       9      28      2 |      -4      9
            |      11       8      66      65      4 |       1
irf   xxxxx |      15       6     -71      -5      0 |       1      7
            |       7      10      36      12      1 |       2
jpl   uuuuu |       7     -28    -147     -47      8 |      11     16
            |      13      21      70      59      9 |       3
mit   uuuuu |      54      -7    -186      29      2 |       9     11
            |      35      25     101      38      2 |       2
ngs   uuuuu |     -33      30     121      90      4 |      -2      7
            |      29      63     106     123      4 |       2
sio   xxxxx |     165     -32    -245      70      8 |      19     21
            |      37      60      79      39      2 |       3


Table 7.1771.0   GPS week: 1771   Day: 0   MJD: 56641.500

                                                         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 |      21       3     196     117     -3 |      15     18
emr   uuuuu |     -29      25     -40      21      2 |      17     21
esa   uuuuu |      -8     -30     -20      17     -1 |       6     12
gfz   uuuuu |       3      30    -146    -225      3 |      19     23
grg   uuuux |      17      13     -89      48     -3 |       5     11
igr   xxxxx |     -23      24     -59     -46     12 |      -3     10
irf   xxxxx |      14      -3     -13     -20      0 |       4     11
jpl   uuuuu |     -14     -43    -107     -42     13 |      12     19
mit   uuuuu |      50     -38      40      -7     -1 |      12     17
ngs   uuuuu |     -26      79     150      70     -3 |       1     10
sio   xxxxx |     113     -99    -125      23     10 |      19     23

Table 7.1771.1   GPS week: 1771   Day: 1   MJD: 56642.500

                                                         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 |     -61      -5     194      30     -8 |      12     13
emr   uuuuu |     -62      39    -137    -137     13 |      15     17
esa   uuuuu |      20     -10      37     118     -2 |       3      5
gfz   uuuuu |      -4      10     -45    -103     -3 |      16     17
grg   uuuux |      28      14    -148      -3     -6 |       2      6
igr   xxxxx |      -8      17      42      30      1 |      -4      8
irf   xxxxx |       6       7    -100     -15      1 |       0      5
jpl   uuuuu |       0     -10    -113    -105     10 |       9     13
mit   uuuuu |      47       7    -225       5      1 |       9     10
ngs   uuuuu |       5      -7     174     -69      0 |      -3      5
sio   xxxxx |     172    -119    -337      77      8 |      17     18

Table 7.1771.2   GPS week: 1771   Day: 2   MJD: 56643.500

                                                         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       0     206     -42     -7 |      10     12
emr   uuuuu |     -34      21     -39      -8     -7 |      17     19
esa   uuuuu |       6     -15     109     107     -4 |       2      6
gfz   uuuuu |       8      -1     -95    -199     -5 |      15     17
grg   uuuux |      19      25    -158       6      1 |       0      6
igr   xxxxx |      -5      16     -41      69     -1 |      -5      8
irf   xxxxx |      10      26    -127       4      0 |       0      5
jpl   uuuuu |      17     -41    -265      30     -6 |      10     14
mit   uuuuu |     -15      18    -216      -8      1 |       8     10
ngs   uuuuu |       8      22      91     -42      7 |      -4      6
sio   xxxxx |     134     -37    -339      68     10 |      17     18

Table 7.1771.3   GPS week: 1771   Day: 3   MJD: 56644.500

                                                         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 |      15     -36     241     150    -17 |      10     12
emr   uuuuu |     -24      69    -200    -199      7 |      16     18
esa   uuuuu |       3       5     163     111     -5 |       2      5
gfz   uuuuu |     -26      22     -13    -354    -10 |      15     16
grg   uuuux |       1      17     -84     -16      2 |       0      5
igr   xxxxx |     -16      39       1     114     -1 |      -5      8
irf   xxxxx |      14       6     -61     -17     -1 |       0      5
jpl   uuuuu |      17       9    -215    -118     17 |       9     13
mit   uuuuu |      71      30    -217      98      1 |       8      9
ngs   uuuuu |     -56     -83     -48     103      7 |      -4      6
sio   xxxxx |     209      -2    -207     142      9 |      18     20

Table 7.1771.4   GPS week: 1771   Day: 4   MJD: 56645.500

                                                         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 |       2     -17     123      40    -11 |       7     13
emr   uuuuu |     -36      28    -188       3     -2 |      17     18
esa   uuuuu |       1     -28      40     -76     -9 |       0      7
gfz   uuuuu |     -17      18     102    -265     -4 |      13     16
grg   uuuux |      28      -2     -44      83      2 |      -1      6
igr   xxxxx |      -6      23      99      12      3 |      -6      9
irf   xxxxx |      24       0     -70       6     -1 |      -1      6
jpl   uuuuu |      -4     -50     -70       1     16 |      10     14
mit   uuuuu |      84     -20    -257      37     -1 |       7      9
ngs   uuuuu |     -58     104     117     288      8 |      -4      6
sio   xxxxx |     143     -30    -269      90      6 |      19     20

Table 7.1771.5   GPS week: 1771   Day: 5   MJD: 56646.500

                                                         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 |     -27       5      61    -142     -8 |       8     13
emr   uuuuu |       7     105    -317    -102     -2 |      19     20
esa   uuuuu |       7     -35      13      66     -6 |       1      7
gfz   uuuuu |      -9     -17     133     -88     -2 |      14     17
grg   uuuux |      13       1     -54      57      4 |       0      6
igr   xxxxx |     -32      20      79     -62      1 |      -4      9
irf   xxxxx |      12      -1     -71       4      2 |       0      6
jpl   uuuuu |      23     -20    -102     -91      5 |      15     17
mit   uuuuu |      56     -24    -215      22      6 |       9     10
ngs   uuuuu |     -59      72     296     177      6 |      -2      7
sio   xxxxx |     212      26    -251      48      8 |      22     23

Table 7.1771.6   GPS week: 1771   Day: 6   MJD: 56647.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -18       7     238      20     -6 |       7     12
emr   uuuuu |     -42      59    -298     -86     -6 |      20     21
esa   uuuuu |      -7      -1      96      -4     -2 |       1      7
gfz   uuuuu |      -1     -35     104    -138     -2 |      15     18
grg   uuuux |      29      20    -111      17     17 |       2      8
igr   xxxxx |     -24      30     -60      77      2 |      -3      9
irf   xxxxx |      26       5     -53       7      0 |       2      8
jpl   uuuuu |      11     -41    -160      -1      0 |      16     19
mit   uuuuu |      88     -22    -215      55      3 |      11     13
ngs   uuuuu |     -42      21      65     106      5 |       0      9
sio   xxxxx |     174      40    -187      44      6 |      24     26



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