[IGSREPORT-22847] Wk 1797 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri Jul 4 05:54:06 PDT 2014


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1797   (Jun 15, 2014 - Jun 21, 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:

igs1797[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1797[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1797[0-6].cls  IGS GPS clock combination summary report.
igs17977.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs17977.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
                0  |  EMR   | 9 WUHN
                0  |  ESA   | 3 UNSA
                0  |  GFZ   | 1 2 6 30 1 6 30 IRKJ RESO
                0  |  GRG   | 6 6 26 DGAR FAA1 KELY WUHN DGAR FAA1 KELY
                0  |  JPL   | 3 26 IRKJ
                0  |  MIT   | 9 26 IRKJ MDVJ
                1  |  COD   | 9 3 9
                1  |  EMR   | WUHN
                1  |  ESA   | 3 NOVM UNSA
                1  |  GFZ   | 1 2 6 30 1 6 26 30 IRKJ INVK IRKJ NOVM
                1  |  GRG   | 6 26 6 26 ALGO GODE GRAZ KOUC NYA1 ALGO GODE GRAZ
                1  |  GRG   | KOUC NYA1 WUHN
                1  |  JPL   | 3 24 GUAM
                1  |  MIT   | IRKJ GODE IRKJ MDVJ
                2  |  COD   | 3
                2  |  EMR   | 9 WUHN WUHN
                2  |  ESA   | 3 DARW WTZR DARW UNSA WTZR
                2  |  GFZ   | 1 6 30 1 6 30 IRKJ NTUS WUHN WUHN
                2  |  GRG   | 6 26 6 26 KELY KELY MAL2 NTUS
                2  |  MIT   | 9 9 BAKO MDVJ
                3  |  COD   | 3 ALGO
                3  |  EMR   | ALGO WHIT
                3  |  ESA   | 3 DUBO IRKJ SOFI FLIN IRKJ SOFI UNSA
                3  |  GFZ   | 1 6 30 1 6 30 ALGO GRAZ INVK KELY MCM4 THU3 CHUR
                3  |  GFZ   | INVK KELY MCM4 THU3
                3  |  GRG   | 6 26 6 26 FAA1 IRKJ KOUR NRMD RBAY WUHN FAA1 GRAZ
                3  |  GRG   | IRKJ KOUC KOUR NRMD QAQ1 RBAY WUHN
                3  |  JPL   | WHIT
                3  |  MIT   | 9 9 REYK
                4  |  COD   | 3
                4  |  EMR   | 9 9 PRDS
                4  |  ESA   | 3 IRKJ IRKJ UNSA
                4  |  GFZ   | 1 2 6 30 1 6 30 INVK KELY NYAL INVK KELY NAIN NYAL
                4  |  GFZ   | ZIMM
                4  |  GRG   | 6 1 6 IRKJ KOUC NRMD NYA1 WUHN IRKJ KOUC MAL2 NRMD
                4  |  GRG   | NYA1 WUHN
                4  |  JPL   | 8
                4  |  MIT   | 9 9 HOB2 HOB2 MDVJ
                5  |  COD   | 3 3 NTUS NTUS
                5  |  ESA   | 3 NTUS NTUS UNSA WUHN
                5  |  GFZ   | 1 2 6 30 1 6 30 FAIR INVK MCM4 NYAL WUHN YELL FAIR
                5  |  GFZ   | INVK MCM4 NYAL WUHN
                5  |  GRG   | 6 6 IRKJ KOUC IRKJ KOUC MAL2
                5  |  JPL   | 3 26
                5  |  MIT   | 9 9 MDVJ PDEL TNML
                6  |  COD   | 3 CAS1 KARR
                6  |  ESA   | 3 NNOR NNOR UNSA
                6  |  GFZ   | 1 2 6 30 1 6 30 CAS1 GODE IRKJ NRMD BAKE NRMD
                6  |  GRG   | 6 6 BOR1 CAS1 GRAZ KOUC BOR1 CAS1 KARR KOUC
                6  |  MIT   | IRKJ

    
 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
               ----+--------+--------+-------------
                6  |  MIT   | ~23:05 | ~ -0.03 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. The following orbit solutions were excluded from the combination because they
    were biasing the weighted average (generally indicated by long arc RMS). They
    were still used for statistics computation.
    
               Day | Centre | PRN list
               ----+--------+---------------
                0  |  GRG   |   6
                1  |  GRG   |   6
                2  |  GRG   |   6
                3  |  EMR   |  25
                3  |  GRG   |   6
                4  |  GRG   |   1   6
                5  |  GRG   |   6
                6  |  GRG   |   6

 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 G01 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |
           PRN G25 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |
           PRN G26 |  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 |    -.4    1.1   -1.7     -34     19    -61     .52
       EMR  |   0 |   -2.8    5.2   10.3      -4     17    -46     .16
       ESA  |   0 |     .5     .8   -2.1       0    -15     26     .02
       GFZ  |   0 |    -.2     .6   -2.0     -19    -29    -21    -.19
       GRG  |   0 |    4.3  -11.1   11.5      -3    -13      2     .78
       JPL  |   0 |    1.7   -1.6    7.1     -98     39    -24    -.51
       MIT  |   0 |    -.3   -8.9   15.3       4     -3    -44     .30
       NGS  |   0 |    3.4   -4.2   26.9     -86    -46      0     .38
       SIO  |   0 |    4.1   -1.8   45.2     -27     -5     -6     .18

       COD  |   1 |    -.5     .0   -1.0     -42     19    -44     .29
       EMR  |   1 |    5.3     .6    6.5      -7      7    -49     .41
       ESA  |   1 |     .1     .7   -2.0       2     -8     24     .09
       GFZ  |   1 |    -.7     .7   -1.9      -9    -33    -30     .19
       GRG  |   1 |    8.0  -13.9   17.9     -15     -6     -1     .66
       JPL  |   1 |    -.8    5.8    8.1     -68     20    -73    -.38
       MIT  |   1 |    4.7   -7.8   16.0       8      5    -46     .45
       NGS  |   1 |    4.6   -3.8   29.7     -96    -54      4     .49
       SIO  |   1 |    6.3     .1   42.2       7      4     13     .17

       COD  |   2 |    -.6     .4   -1.4     -29     24    -31     .49
       EMR  |   2 |    6.7    3.3   12.7      -1     20    -59     .17
       ESA  |   2 |    -.5     .8   -1.4     -10     -7     13     .07
       GFZ  |   2 |    -.2     .7   -1.1      -6    -29    -21    -.33
       GRG  |   2 |   18.3   -6.9   25.6     -17     20    -15     .18
       JPL  |   2 |    2.9   -1.0    9.7       7     56    -77    -.23
       MIT  |   2 |    4.2   -6.6   14.5       7      5    -57     .22
       NGS  |   2 |    1.5     .5   25.6     -74    -54      2     .64
       SIO  |   2 |    7.2   -2.2   42.6      -1      5     -1     .06

       COD  |   3 |    -.7     .0   -1.4     -54     29    -50     .36
       EMR  |   3 |    8.0   -2.0   16.2       1     28    -79     .0 
       ESA  |   3 |    -.6    1.1   -1.3     -23    -15     15    -.07
       GFZ  |   3 |     .1     .4   -1.6     -23    -37    -21    -.19
       GRG  |   3 |   16.4  -12.2   16.8     -26     15    -22     .61
       JPL  |   3 |    2.7     .3    7.2     -25     25    -55    -.48
       MIT  |   3 |    5.2   -3.2   16.9      -8      4    -51     .30
       NGS  |   3 |    2.2   -3.2   25.3     -81    -66     -1     .37
       SIO  |   3 |    7.6    2.9   38.3     -19      9    -25     .05

       COD  |   4 |    -.4     .1   -1.4     -31     25    -58     .25
       EMR  |   4 |    9.7   -1.9   13.2       3     20    -58     .20
       ESA  |   4 |    -.3     .5   -1.0      -9    -15     25     .07
       GFZ  |   4 |     .2     .5   -1.2     -18    -33    -31    -.32
       GRG  |   4 |   16.4  -10.7   18.4     -35     18    -18     .53
       JPL  |   4 |   10.6   -1.8   11.9      -7     33    -71    -.46
       MIT  |   4 |    3.4   -5.8   18.9      -8     -1    -51     .31
       NGS  |   4 |     .8   -7.0   26.6    -114    -51    -26     .36
       SIO  |   4 |    5.9   -3.0   34.0     -25     10    -24     .03

       COD  |   5 |    -.7     .8    -.5     -26     18    -18     .37
       EMR  |   5 |    4.3    4.2    7.5      -8     18    -61     .0 
       ESA  |   5 |    -.9     .4   -1.4      -2    -12     20    -.04
       GFZ  |   5 |     .0     .0   -1.5     -19    -30    -23     .08
       GRG  |   5 |   10.5  -14.1   11.1     -14     22    -19     .59
       JPL  |   5 |    4.3   -4.4    7.5     -38     38    -59    -.35
       MIT  |   5 |    2.5   -7.1   11.6       1      7    -56     .23
       NGS  |   5 |    4.0   -7.6   16.3     -75    -53    -11     .59
       SIO  |   5 |    5.5   -3.6   45.7     -16      8    -16     .14

       COD  |   6 |    -.5    1.0   -1.0     -37     12    -41     .33
       EMR  |   6 |    2.4   -1.8   12.2      -1     25    -62    -.0 
       ESA  |   6 |    -.7     .3   -1.4      -1    -10      9     .04
       GFZ  |   6 |    -.1     .0   -1.8     -22    -42    -17     .22
       GRG  |   6 |   14.3  -18.6   22.1     -20     39    -26     .61
       JPL  |   6 |    4.9    1.6   16.3     -28     46    -65    -.28
       MIT  |   6 |    1.7   -7.4   16.9       6     11    -58     .23
       NGS  |   6 |    3.1     .8   23.4     -30    -84     27     .48
       SIO  |   6 |    3.3   -2.2   31.2       5     10     -3     .27


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 1.1797.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1797.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 2.1797.[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 3.1797.[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 5.1797.0-6). 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 1797 summary.                       (Jun 15, 2014 - Jun 21, 2014)

Table 1.1797.a   GPS week: 1797   MJD: 56823.000-56829.000

         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  246|    0     1    -4     8    -1    10   .02   10   10 |    -966     109     16     99
        |    1     0     2    17    16    17   .01           |     251     412
emr   78|    1    -2     2   -18   -18    26   .23   12   12 |    1969      14     15    112
        |    1     1     0    12    12     9   .03           |     572    1035
esa  150|    1     0    -8    -7    13     3  -.36   11   12 |    -589    -889     12    171
        |    0     0     0    11     9    10   .03           |    1345    1361
gfz  192|   -1     1     2    -4    -3   -10  -.04   11   10 |    -314      40     13    137
        |    0     0     1     9    12    12   .02           |     490     929
grg  183|    4     0     8    18   -26    -4   .30   14   14 |    -310      17     16    144
        |    1     1     2    14     8     7   .05           |     253     582
igr  n/a|    0     0    -4   -13   -12    13  -.22    5    5 |    3466    -714     16     86
        |    0     0     1     9     8     7   .02           |    1291    1101
jpl   80|    0     0    -5    29    22   -24   .00   14   14 |    1438      12     17    109
        |    0     1     0    19    26    22   .03           |     508    1121
mit  300|    0     0     2    11    -2    21  -.06   13   12 |     312    -297     20    219
        |    1     1     0    17    25    20   .04           |     485     703
ngs  228|   -1     0     5   -22     8   -29  -.01   12   10 |   -1238     232   1636   3373
        |    1     1     3    59    49    11   .05           |     493     578
sio  478|    0     3    -1   -17   -10     9 -1.03   23   21 |     ---     ---    ---    ---
        |    0     1     2    12    22    16   .06           |     ---     ---


Table 1.1797.b   GPS week : 1797   MJD: 56823.000-56829.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1797.0   GPS week: 1797   Day: 0   MJD: 56823.000                            

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|   -1     2    -7    22     9    10   .02    9    8 |    -916     317     14     95
emr   80|    0    -2     3    -8     6    32   .21   13   13 |    1112    1210     17    130
esa  150|    0     0    -8    -3    29    10  -.39   11   11 |     456   -1686     11    194
gfz  196|    0     0     0     0    17    -3  -.04   11   10 |    -260     425     12    129
grg  181|    4     0     9    29   -25     8   .28   14   13 |    -365     352     18    151
igr  n/a|    0     0    -2   -15    -5     9  -.23    5    5 |    4412     841     15     83
jpl   80|   -1     0    -4     4    -9   -50  -.00   14   14 |     746    1242     17    103
mit  300|    1    -2     3    41    10    10  -.04   12   11 |     -50     405     20    208
ngs  232|    0     1     9  -118   -64   -37   .08   13   10 |    -885     155   1676   2936
sio  445|    1     1    -1   -25    -6     8 -1.01   22   17 |     ---     ---    ---    ---

Table 2.1797.1   GPS week: 1797   Day: 1   MJD: 56824.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0     1    -8    25    -7     5   .04   10   10 |    -932     105     15     98
emr   80|    0    -1     2   -27   -22    44   .22   12   12 |    2153    -678     17    120
esa  150|    1     0    -8     0    18    -2  -.37   12   12 |     136   -2526     12    159
gfz  195|    0     1     3     0     7    -7  -.04   11   11 |    -106    -581     12    127
grg  186|    3     0    12    35   -39    -5   .23   14   13 |    -122    -341     18    152
igr  n/a|    0     0    -4   -28     0     0  -.25    5    5 |    5046   -1054     15     77
jpl   80|   -1     0    -6     7    48   -34   .01   15   15 |    1758    -766     17    108
mit  300|    0    -1     2    -8    13   -11  -.03   12   11 |     115    -282     19    215
ngs  231|   -1     1     8   -11     3    -9   .01   13   10 |    -840    -139   1576   3458
sio  487|    0     1    -2     0     2    28 -1.03   22   24 |     ---     ---    ---    ---

Table 2.1797.2   GPS week: 1797   Day: 2   MJD: 56825.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  249|    0     1    -5   -17   -33    31   .02   11   10 |   -1018    -277     18     96
emr   80|    0    -4     3   -36   -32    23   .21   12   12 |    1937   -1398     20    106
esa  150|    3     0    -8   -29     1    -9  -.34   13   13 |   -1275     508     14    179
gfz  190|   -1     0     1   -21     0    -8  -.02   10   10 |    -298   -1048     15    131
grg  185|    2     1     7    -2   -22    -7   .25   14   14 |      85    -948     17    146
igr  n/a|    0     0    -4   -21   -16    12  -.20    5    5 |    4418   -1946     16     80
jpl   80|    0     0    -5    29    60   -52   .04   14   14 |    1493   -1424     17     98
mit  300|    1     1     2    -4   -54    18  -.04   13   11 |     280    -734     25    225
ngs  229|    0     1     4    82    99   -29  -.08   13   10 |    -978    -596   1442   3172
sio  485|    0     2    -2   -27   -49    24  -.98   22   22 |     ---     ---    ---    ---

Table 2.1797.3   GPS week: 1797   Day: 3   MJD: 56826.000                            

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  243|    0     1    -5    14    14    31   .03   10   10 |    -852     168     16     96
emr   75|    2    -4     1    -3   -25    14   .22   13   13 |    1359    1439     16    104
esa  150|    0     1    -6   -12     7    16  -.36   11   12 |   -1053    -189     13    170
gfz  190|   -2     1     2   -13    -1   -33  -.05   11   11 |   -1201    1392     15    141
grg  184|    2     0     8     7   -36   -15   .29   15   14 |    -670     866     16    148
igr  n/a|    0     0    -5   -16   -25    17  -.20    5    5 |    3408     740     19     97
jpl   80|   -1    -1    -4    29     3   -12   .03   14   14 |     898    1687     21    133
mit  300|    0     1     3     3     4    47  -.03   13   13 |      70    -126     22    224
ngs  229|   -2     0     6    -6     8   -40  -.05   11    9 |   -1171     380   1929   3749
sio  484|    0     4    -3   -20    10     3  -.99   25   23 |     ---     ---    ---    ---

Table 2.1797.4   GPS week: 1797   Day: 4   MJD: 56827.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  246|   -2     0    -2     7    -3   -17   .03    9    8 |   -1250     789     16    104
emr   80|    1    -2     2   -21   -16    23   .23   12   12 |    2009     362     14    117
esa  150|    1     0    -9    -8     9    15  -.32   11   11 |     122   -1297     12    163
gfz  192|    0     1     2    -2   -19     6  -.08   11   10 |    -632    1060     12    132
grg  186|    4     0     8     8   -16    -9   .30   12   12 |    -419     -78     15    135
igr  n/a|    0     1    -5    -3   -17    24  -.23    5    5 |    2983    -686     17     90
jpl   80|    0     1    -5    61     4     1  -.05   13   13 |    1242     295     17    111
mit  300|   -1     0     2    22    23    37  -.06   15   14 |     300     517     20    223
ngs  231|    0     0     4   -39    23   -26  -.02   11    9 |   -2290    1285   1508   3501
sio  485|    0     2    -1   -32    13   -22 -1.00   22   20 |     ---     ---    ---    ---

Table 2.1797.5   GPS week: 1797   Day: 5   MJD: 56828.000                            

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  244|    0     1    -2    20    12    13   .02   12   12 |    -532    -490     20    111
emr   77|    2    -2     2   -27   -18    22   .29   12   12 |    2680    -471     11    107
esa  150|    0     0    -8     8    19     0  -.37   12   12 |     635   -2084     13    173
gfz  192|   -1     1     3     3   -11    -9  -.06   11   10 |     353    -329     15    160
grg  179|    5    -2     5    19   -19     0   .34   14   14 |    -498     367     15    145
igr  n/a|    0     1    -3    -6   -12    14  -.22    5    5 |    2767   -1593     17     88
jpl   80|    0     1    -4    41    37   -22  -.01   15   15 |    2159    -490     16    114
mit  300|   -1     0     3    21   -13    35  -.11   13   13 |    1379   -1559     22    222
ngs  226|   -2     0     0   -38   -18   -40  -.02   10    8 |   -1259     417   1676   3888
sio  478|    0     5     3    -9   -31     9 -1.13   24   21 |     ---     ---    ---    ---

Table 2.1797.6   GPS week: 1797   Day: 6   MJD: 56829.000                            

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  242|    0     0    -2   -14    -1    -4  -.00   11   11 |   -1266     157     17     94
emr   80|    1    -2     1    -5   -21    23   .24   12   12 |    2535    -366     14    106
esa  150|    1     0    -9    -7     8    -5  -.38   11   11 |   -3148    1051     12    160
gfz  190|   -2     0     1     5   -14   -17  -.03   11   10 |     -59    -638     14    145
grg  184|    5    -1     7    31   -21     0   .38   15   15 |    -187     -96     15    135
igr  n/a|   -1     1    -3    -2   -11    17  -.20    6    6 |    1234   -1300     18     92
jpl   80|    0     0    -4    35    14    -2   .02   14   14 |    1776    -460     16    101
mit  300|    0     0     3     5    -1    12  -.10   13   12 |      94    -303     17    216
ngs  224|   -3     2     4   -24     9   -19  -.01   12   10 |   -1245     128   1650   2908
sio  483|    0     4     0    -4    -9    16 -1.09   23   22 |     ---     ---    ---    ---

       
       
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 3.1797.0   GPS week: 1797   Day: 0   MJD: 56823.000                            

        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    8   13   11   10    4   13    8   11   15    4 |   287  280  290  286  277  288  229  286  283  286   284
   2  |    8   11   11   14   14    5   13   11    9   21    4 |    18   29   22   21   27   19   24   29   27   26    22
   3E |    9   15   13   11    9    5   17    8   19   12    4 |    29   34   31   33   33   30   31   31   37   25    31
   4  |    9    9   11    8   10    5   11   12    7   57    3 |    28   34   25   30   35   27   29   36   33   63    30
   5  |    9   14   14   11   11    4   16   11   10   33    4 |    40   42   40   39   37   35   42   36   37   39    37
  X6  |   12  ---   10   12   82    7  ---   12   13   37    6 |    92  ---   86   83  140   84  ---   79   80   73    84
   7  |    8   12   10   10   15    5   16   12   10   18    4 |    21   23   15   26   29   17   19   22   19   15    19
   8  |    7    8   10    7    9    5    8    9   10   30    3 |    19   20   19   19   19   16   17   18   17   28    17
  X9  |   16   27   18  ---  ---   13  ---   16   24  ---   10 |    23   25   23  ---  ---   18  ---   21   34  ---    19
  10  |    6    8   11    9   12    4    7   12   12   17    3 |    30   34   25   33   40   28   28   36   34   34    31
  11  |    7   10   16    8   15    3   10   10   12   10    4 |    44   52   41   47   59   45   51   47   49   43    47
  12  |   11   18    7   17   18    6   17   14   14   16    5 |    20   27   13   24   25   14   22   21   22   19    17
  13E |    6   11    8    8   13    5   12   16   12   10    4 |    26   26   21   26   30   22   27   25   24   16    23
  14E |    8    7    6    8   12    6   13    8    9   13    3 |    28   25   21   27   25   22   24   24   27   22    24
  15  |    8   24    7   15   22    4   22   15   11   21    6 |    22   31   19   32   34   22   28   29   28   30    24
  16  |    8   17    7   17   12    5   15    9   23   18    5 |    16   23   14   23   22   15   20   17   27   14    15
  17  |   12   13   10    8   18    4   21   11   13   17    5 |    24   23   18   20   29   19   26   17   22   24    19
  18  |    7   10   11   16   12    5   13   10   12   29    4 |    22   29   23   26   30   24   28   28   29   30    24
  19  |    6   13    9   10   13    6   12   14   13   14    4 |    25   31   21   32   35   27   28   25   31   25    26
  20  |   11    9   13    9   15    5   11    7   11   25    4 |    24   27   22   30   26   23   28   25   27   22    24
  21  |    9   12   11   10    8    4   15   11   11   30    4 |    30   34   27   33   35   29   31   32   34   29    30
  22  |    8   11   11    9   13    5   14   15   10   28    4 |    30   35   29   32   39   31   37   34   32   35    31
  23E |    7    8    9   12   16    4   12    9    9   14    4 |    51   53   49   57   48   51   48   49   53   55    50
  24  |    7    9   13   12   13    4   12   12    9   15    4 |    20   23   24   21   25   17   24   19   20   21    20
  25  |    9   11   13    8   15    5   16   10    9   17    4 |  9999 9999 9999 9999  779 9999  766 9999 9999 9999  9999
  26E |   16   15   14   12   16    7   18   18   31   13    6 |   151  158  156  158  153  155  156  157  168  159   157
 X27E |    8   16   15    9  ---    7   13   11   13   13    5 |    22   19   28   21  ---   20   22   18   22   17    20
  28  |    9   10    8   15   17    4   11   13    9   16    4 |    19   23   13   23   30   17   21   14   20   17    17
  29  |    9   23    7   11   19    5   21   13   18   20    5 |    15   27   20   24   32   20   29   22   29   36    21
 X30  |    5   10   11    9  ---    5   15   12    8   18    4 |    31   32   33   28  ---   29   35   30   33   29    31
  31  |   10   13   10   11   16    6   11   14   15   11    4 |    22   26   15   24   32   17   22   19   23   14    19
  32  |    6    9   12    9    9    3    8    8    9   15    3 |    24   28   21   24   26   20   26   26   25   20    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   11   11   14    5   14   12   13   22      |T   40   42   38   43   74   38   63   41   43   42    39
 WRMS |    8   13   11   10   13    5   14   11   10   17      |NE  40   41   38   43   84   37   72   41   42   42    39
 MEDI |    8   11   11   10   13    5   13   11   11   17      |MD  24   28   23   27   32   22   28   26   29   26    24

Table 3.1797.1   GPS week: 1797   Day: 1   MJD: 56824.000                            

        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    9   14   11   11    5   15    9    8   16    4 |   294  286  300  296  282  296  225  291  293  294   291
   2  |    9   11   14   12   15    3   13   12   11   20    4 |    14   27   19   17   25   16   21   21   24   20    18
   3E |    9   13   12   10   10    7   18   11   19   17    5 |    25   35   27   29   32   24   31   25   37   23    28
   4  |   16   10   13   10   12    6   11   13   12   50    4 |    32   26   22   25   31   23   24   28   28   50    26
   5  |   10   10   12   11   14    4   14   12   10   30    4 |    29   33   24   27   29   23   28   24   29   24    25
  X6  |   21  ---   13   15   83    9  ---   18   14   42    8 |    63  ---   55   52   88   52  ---   54   55   46    55
   7  |    9   12   10   11   16    5   21   10   11   15    4 |    20   23   14   25   29   15   25   22   21   12    19
   8  |    9    7   12    9   11    5   11   10   10   33    3 |    20   20   19   19   18   14   20   17   19   30    16
  X9  |   21   17  ---  ---  ---   14  ---   23   34  ---   14 |    32   25  ---  ---  ---   18  ---   25   41  ---    22
  10  |    9    8   12    8   12    5    9   13    8   21    3 |    23   27   17   25   28   19   21   27   24   25    22
  11  |    9   10   18   11   17    4   10   11    8   10    4 |    28   40   28   32   44   30   37   33   35   29    32
  12  |    9   16    8   14   19    5   18   10   13   12    5 |    15   24   14   22   27   14   18   18   21   14    16
  13E |    7   10   11    9   12    6   12   11   14   13    4 |    31   31   27   32   33   27   32   31   31   23    29
  14E |    9    9    6    8   10    4   15    8    8   13    3 |    25   28   23   26   23   23   23   25   28   24    24
  15  |    8   17    9   12   22    4   19   12   17   22    5 |    23   28   16   28   33   19   29   26   34   27    23
  16  |   10   18    9   16   14   10   14   11   16   22    5 |    18   26   13   22   23   17   19   17   23   12    16
  17  |   11   14   11    7   15    3   20   13   19   18    5 |    26   29   27   25   30   25   34   28   30   37    25
  18  |    7   10   11   12   12    4   15   11   11   28    4 |    15   24   20   21   22   16   21   21   23   26    18
  19  |    9   15    9   10   14    4   13   14    9   16    4 |    25   35   22   30   36   24   28   24   29   22    26
  20  |    9   10   13   12   14    3   12    8   12   22    4 |    18   20   17   26   18   13   19   16   23   11    16
  21  |    9   10   12    9   11    4   16    9   11   28    4 |    22   30   24   26   31   22   30   23   29   21    24
  22  |    8   10   11   10   12    3   17   14    9   26    4 |    20   28   23   25   30   20   26   22   22   26    22
  23E |    9    8   11   14   12    8   14   11   11   13    4 |    80   81   79   83   79   79   79   80   80   82    80
  24  |    8   10   12    7   13    3   14    7   10   15    4 |    18   26   24   18   24   16   23   19   20   17    20
  25  |   10   11   13    8   12    4   14   10    9   19    4 |  9999 9999 9999 9999  903 9999  906 9999 9999 9999  9999
  26E |   21   15   13   11   18    9   17   18   32   21    7 |   100  104   98  106  102  100  101  106  115   93   103
 X27E |    7   13   14   10  ---    4   16    9   10   12    4 |    22   18   27   24  ---   19   23   19   22   15    20
  28  |   11   13   11   13   17    6   13   12   12   17    4 |    24   25   13   22   28   15   21   12   22   20    17
  29  |    9   19    7   10   16    6   20   14   11   16    5 |    22   30   21   22   27   22   33   19   29   31    21
 X30  |    7   10   11    7  ---    4   16   14   10   17    4 |    26   30   26   24  ---   24   32   25   27   25    25
  31  |   11   10   11   11   17    4   14   14   12   19    4 |    23   25   15   24   32   15   22   19   17   15    19
  32  |   11    9   12   10    9    5    8   10   12   16    4 |    22   23   19   22   26   18   22   20   26   12    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   12   11   11   14    5   15   12   13   22      |T   37   40   35   39   73   34   65   36   40   36    36
 WRMS |   10   12   12   11   13    5   15   11   10   24      |NE  36   38   34   38   84   32   75   35   38   36    34
 MEDI |    9   10   12   10   14    4   14   11   11   18      |MD  23   27   22   25   30   20   25   24   28   24    22

Table 3.1797.2   GPS week: 1797   Day: 2   MJD: 56825.000                            

        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    8   16    8   10    5   13    9   13   18    4 |   343  337  355  346  336  347  269  347  348  345   343
   2  |    9   14   12   12   14    7   11   13   12   17    4 |    19   29   22   21   20   15   24   27   27   21    20
   3E |   17   15   14    8   12    6   15   14   21   21    5 |    30   35   29   30   33   27   31   26   47   29    29
   4  |    4    7   12    9   11    4    9   11   10   53    3 |    23   27   25   26   29   23   25   30   32   56    25
   5  |   12   14   13   11   11    6   15   15    9   30    4 |    34   37   34   35   30   30   34   31   35   30    31
  X6  |   15  ---   12   12   81   10  ---   17   14   41    7 |    67  ---   67   62  102   63  ---   63   66   60    64
   7  |   11   11   13    9   15    7   12   11   10   16    4 |    21   23   17   26   28   17   21   23   29   15    20
   8  |   10   10   11    8    9    3    8    9   10   30    3 |    20   24   19   21   18   16   18   20   22   29    18
  X9  |   23   17   11  ---  ---   13  ---   13   20  ---    9 |    28   27   23  ---  ---   21  ---   22   30  ---    20
  10  |    8   10   12    8   11    4   10   12   11   18    4 |    25   31   21   28   30   22   25   30   33   28    26
  11  |   10    9   19    8   16    3    9   10   11   12    4 |    37   44   35   36   47   35   40   37   45   37    38
  12  |   12   13    9   14   20    5   18   11   14   10    5 |    22   26   13   25   26   15   22   20   24   15    18
  13E |   12   13    9   10   12    4   13   17   11   11    4 |    26   26   22   26   25   21   27   25   22   20    22
  14E |   10    8    9    8   13    5   11    9    7   11    3 |    22   20   16   19   17   15   18   22   22   18    18
  15  |   10   18    9   12   18    5   20   15   18   24    5 |    22   29   17   31   28   21   28   28   28   31    23
  16  |   13   14   11   16   15    7   17   11   13   22    5 |    17   23   16   22   23   16   24   18   28   17    17
  17E |   11   10   10   10   17    5   20   17   13   18    5 |    20   24   21   24   27   17   28   29   29   32    21
  18  |    8    8   14   10   13    5   12   15   12   26    4 |    20   26   22   22   19   19   23   25   31   27    21
  19  |    9   10   10    8   14    4   11   13   10   15    4 |    28   30   22   30   34   26   31   26   38   25    28
  20  |    9   10   13    8   12    4    9    8    8   23    3 |    19   23   21   25   20   17   22   19   26   25    19
  21  |   10   12   15    8   10    5   14   12   14   28    4 |    25   30   23   25   28   22   30   29   36   25    26
  22  |    9   10   14    9   11    4   10   10   16   22    4 |    26   32   26   29   29   25   26   30   36   29    27
  23  |   12   10   10   14   13    7   16   12   12   16    4 |   111  110  107  115  107  108  105  111  110  109   109
  24  |    8    9   13    7   12    4   12    8    9   15    3 |    20   25   24   21   26   17   27   23   22   24    21
  25  |   10    9   14   10   17    4   15   13   10   14    4 |   942  938  935  936 9999  942 9999  946  940  945   938
  26E |   23   17   14   13   17    8   19   20   25   19    7 |   113  115  113  114  112  114  114  120  121  110   114
 X27E |   10   14   14    7  ---    6   15   10   10   17    4 |    24   21   28   23  ---   22   24   20   28   22    22
  28  |   11   13   13    8   19    5   16   13    8   18    4 |    20   26   15   20   30   15   22   16   27   22    17
  29E |   12   16   12   13   23    8   19   16   12   17    5 |    35   35   37   41   38   34   39   35   43   40    35
 X30  |    9    9   13    7  ---    6   14   13   11   16    4 |    43   45   45   42  ---   41   49   45   48   42    44
  31  |   10   12   13   10   18    4   13   13    9   15    4 |    22   27   18   25   34   17   22   22   24   19    21
  32  |   11   11   13   10   11    4   10    9    6   16    4 |    23   27   23   21   25   19   25   26   28   19    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   12   13   10   14    5   14   13   13   22      |T   70   73   69   73   47   67   41   71   75   73    69
 WRMS |   10   12   13   10   14    5   14   11   10   22      |NE  79   84   78   83   46   77   38   81   85   84    79
 MEDI |   10   11   13    9   13    5   13   12   11   18      |MD  24   27   23   26   28   21   26   26   30   28    23

Table 3.1797.3   GPS week: 1797   Day: 3   MJD: 56826.000                            

        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    8   13   12   10    6   13    9    9   17    4 |   423  420  428  427  412  427  304  426  422  422   423
   2  |    9   13   13   10   15    4   11   16   10   23    4 |    21   27   20   19   21   17   22   27   23   24    19
   3E |   11   16   12    8   13    7   16   15   19   19    5 |    24   32   26   29   32   24   28   25   36   23    26
   4  |    8   11   12    8   11    4    8   10    8   63    3 |    27   28   23   27   29   24   26   30   26   66    25
   5  |   13   13   12   13   11    4   14   14   13   31    5 |    40   41   36   34   34   33   38   34   35   33    34
  X6  |   11  ---   14   12   85    6  ---   17    9   36    6 |    76  ---   71   64  115   68  ---   65   68   63    69
   7  |    9   13   10   14   16    6   15   13   10   14    4 |    23   25   20   27   29   18   21   23   22   14    20
   8  |    8   11   11    9   10    4    8   11   13   35    4 |    23   23   23   21   20   19   19   18   21   33    19
  X9  |   17   24  ---  ---  ---   30  ---   25   33  ---   14 |    29   31  ---  ---  ---   23  ---   21   50  ---    27
  10  |    9   10   11   13   14    3    6   11    7   17    4 |    28   31   24   30   31   24   27   32   29   28    27
  11  |    9    8   15   10   16    3   10   11   10   14    4 |    39   43   37   41   49   37   43   36   40   33    39
  12  |   10   14   11   15   20    5   16   12   10   22    5 |    23   27   16   24   27   16   23   22   23   23    19
  13E |    7   16    9   11   11    4   11   15    7   14    4 |    27   30   24   28   34   24   30   27   32   23    26
  14E |   10   12   10    9   14    6   14    9   10   13    4 |    27   27   20   24   24   22   25   23   23   20    22
  15  |   10   22   10   17   19    5   23   15   14   25    6 |    20   30   15   29   29   19   28   26   24   29    20
  16  |   13   15   10   13   14    9   16   14   13   23    5 |    18   24   14   20   22   15   25   18   17   15    16
  17E |   12   12    8   10   13    4   21   12    9   18    4 |    22   22   19   21   26   18   27   19   21   28    19
  18  |    9    9   13   11   12    4   11   15   10   31    4 |    17   25   20   18   23   15   25   25   20   27    19
  19  |    8   12    7   11   16    4   10   13    8   14    4 |    33   31   26   38   40   29   28   26   30   29    30
  20  |   12   10   12   11   13    5   11   11    8   28    4 |    25   25   21   29   23   22   24   20   26   19    22
  21  |   12   10   13   10    9    5   16   12   11   32    4 |    20   29   23   25   29   20   31   26   31   26    23
  22  |    9   11   14    7   13    3   11    9   15   25    4 |    23   31   23   23   29   20   27   27   25   27    23
  23  |    8   14   10   13   16    5   16   14    9   15    4 |    47   51   45   57   59   47   46   47   55   45    49
  24  |   10   14   12    9   15    4   12   12    7   19    4 |    18   27   24   18   26   16   23   21   18   18    19
 X25  |   15   96   18   24  ---   14  ---   38   13   30   11 |  9999 9999 9999 9999  --- 9999  --- 9999 9999 9999  9999
  26E |   17   16   13   11   15   10   17   21   19   21    6 |   102  106  106  104  104  101  106  110  108  108   105
 X27E |    7   15   15    8  ---    6   13    9   12   13    4 |    23   20   27   21  ---   19   23   20   26   17    21
  28  |    9   13   10   11   19    3   11   14    8   19    4 |    22   24   17   23   29   17   20   16   20   17    18
  29E |   13   16    9   13   19    8   16   15   14   29    5 |    38   37   31   35   40   31   35   34   39   43    33
 X30  |    8    9   13   14  ---    5   12   18   13   17    5 |    48   48   51   45  ---   47   48   47   50   47    47
  31  |   11   13   12   11   18    6   10   12    8   17    4 |    23   25   12   23   34   16   22   19   20   16    18
  32  |   10   10   11    8   12    5    7   12    4   21    3 |    22   28   19   21   27   18   24   23   26   20    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   13   11   11   15    5   14   13   11   25      |T   43   45   42   44   49   40   40   43   45   44    41
 WRMS |   10   13   12   11   14    5   14   13    9   23      |NE  45   48   44   47   51   42   41   45   47   47    44
 MEDI |   10   13   12   11   14    5   12   13   10   21      |MD  24   28   23   27   29   22   27   26   26   27    23

Table 3.1797.4   GPS week: 1797   Day: 4   MJD: 56827.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   12   14   13   16  104    6  ---   14   13   26    6 |   711  708  712  710  663  712  ---  711  708  714   710
   2  |    9   12   13    9   13    5   10   16   11   25    4 |    16   25   19   18   20   13   21   24   21   23    17
   3E |    7   17   12   11   12    6   14   14   19   19    5 |    26   33   26   25   29   22   28   22   35   24    25
   4  |    6   10   10   12   10    4    7    9    6   58    3 |    24   27   23   27   29   22   23   25   25   55    24
   5  |    9   11   13   10   12    5   13   14   12   30    4 |    37   41   34   33   35   32   39   32   35   35    34
  X6  |   11  ---   12   12   81    7  ---   15    9   37    6 |    68  ---   64   56   97   60  ---   59   58   58    62
   7  |    9   12    9   13   13    7   15   17    7   17    4 |    21   24   14   23   29   14   19   21   20   15    17
   8  |    7    8    8   10    9    4    8   11   10   30    3 |    17   20   16   15   19   12   17   16   19   27    15
  X9  |   22   27   14  ---  ---   14  ---   23   25  ---   11 |    22   30   21  ---  ---   20  ---   23   27  ---    16
  10  |    8    8   11   11   15    3   10   12    8   16    4 |    25   28   20   26   31   20   26   25   25   23    24
  11  |    8    9   16   11   15    4   10   12   11   14    4 |    36   40   31   37   48   32   38   35   35   31    35
  12  |   10   16   10   11   14    7   12   20   13   15    5 |    18   27   12   22   26   15   21   20   21   16    17
  13E |    7   15    8    7   11    5   12   15    8   12    4 |    21   24   18   18   25   15   23   23   23   14    19
  14E |   10    9    8    9   11    6   11   12   11   12    4 |    28   27   21   25   24   21   24   26   24   22    23
  15  |   10   15   10   14   18    5   20   19   13   20    5 |    21   26   15   29   32   16   24   24   23   23    20
  16  |    9   13   11   13   10    8   12   13   10   20    4 |    18   23   15   18   20   11   18   17   17   12    15
  17E |   12   12    9   16   15    5   21   12   12   18    5 |    20   21   18   17   26   15   27   19   18   25    17
  18  |    8   10   13   14   10    5   11   15    9   22    4 |    13   23   18   17   19   14   20   23   20   19    15
  19  |    6   13    7    9   13    5   10   14    7   12    3 |    68   67   63   70   67   65   65   68   70   63    66
  20  |    9    7   12    8    9    5   10   12    7   28    3 |    25   22   17   20   20   17   18   18   22   19    18
  21  |    8   13   13   11   10    5   12   15   12   30    4 |    24   28   20   23   27   20   24   26   26   21    22
  22  |    9    9   12    8   11    3    9   12    9   19    3 |    22   29   22   22   28   20   25   27   27   26    23
  23  |    7   10    9   11   12    4   15   14    9   16    4 |    37   40   30   38   42   33   33   36   39   36    35
  24  |    9   12   13    8   11    6   13   13   11   16    4 |    19   23   24   19   23   16   20   20   18   22    19
  25  |    9    9   14    8   11    6   12   20   14   16    4 |   607  608  609  611  429  608  416  602  612  603   608
  26E |   14   15   13   11   14    9   17   22   17   21    5 |    94   99   94   96   97   92   98  104   95  101    96
 X27E |    7   14   14    8  ---    6   12   10    9   15    4 |    21   17   27   21  ---   18   23   19   22   17    20
  28  |    7   14   11   15   13    4   12   17    9   17    4 |    20   26   15   22   27   14   18   17   18   20    16
  29E |   11   19    7   14   14    7   19   18   15   17    5 |    26   26   20   22   23   20   29   27   28   31    21
 X30  |    6   10   11    8  ---    5   13   13    8   17    4 |    32   38   32   30  ---   29   34   29   29   33    31
  31  |    9   12   13   14   16    7   12   18   11   16    5 |    24   27   16   23   35   15   22   23   22   14    20
  32  |    6    8   11   10    7    4    8   14    7   19    3 |    22   26   19   21   24   18   21   24   23   24    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   12   11   11   12    5   13   15   11   22      |T   68   71   65   69   69   64   41   68   68   69    66
 WRMS |    8   12   11   10   12    5   13   14    9   20      |NE  80   84   77   82   80   76   43   80   80   83    78
 MEDI |    9   12   11   11   12    5   12   14   10   18      |MD  24   27   20   23   28   20   24   24   24   24    20

Table 3.1797.5   GPS week: 1797   Day: 5   MJD: 56828.000                            

        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    8   13    9   18    5   16   11   13   15    4 |   626  621  634  629  618  629  675  630  630  628   626
   2  |   11   11   15   10   16    6   14   13   10   24    4 |    18   25   21   20   18   16   19   22   20   25    17
   3E |   11   17   12    8   17    5   14   15   15   16    5 |    30   35   27   28   35   24   28   26   35   23    28
   4  |   10   11   13    8    8    4    9    9    8   73    3 |    34   31   30   34   30   31   29   31   31   85    31
   5  |   12   11   12   11   12    5   15   11    9   36    4 |    31   36   29   30   31   26   34   28   29   27    29
  X6  |   16  ---   13   15   84    8  ---   15    8   33    6 |    57  ---   51   45   83   50  ---   50   52   46    50
   7  |   10   13   12   11   14    4   16   11    9   14    4 |    23   25   18   23   27   17   21   21   21   14    19
   8  |   11   10    9   10   13    4   11    9    6   27    3 |    19   21   17   18   20   13   18   16   18   24    16
  X9  |   27   19   12  ---  ---   14  ---   25   25  ---   11 |    21   24   20  ---  ---   19  ---   26   39  ---    22
  10  |    9   10   10    6   15    3   16   10    6   25    4 |    26   27   21   23   27   20   21   24   21   26    22
  11  |    9    9   16   11   16    4    9   12    8   12    4 |    28   33   26   30   39   25   29   29   25   25    27
  12  |   16   16   11   12   16    7   19   17   12   14    5 |    20   26   14   22   26   14   20   17   23   15    17
  13E |    9   11    8    7   12    3   12   10    6   12    3 |    22   22   20   21   27   18   22   22   22   19    20
  14E |   14   11   10    9   12    5   13   13    8   10    4 |    34   31   28   30   31   25   27   33   35   22    29
  15  |    9   15   12   12   21    5   21   19   13   22    5 |    22   26   17   25   34   17   25   22   21   28    20
  16  |   12   14   12   13   11    4   13   13    9   21    4 |    22   23   15   23   23   15   23   20   19   12    18
  17E |   13   12    8   12   14    6   20    9   10   14    4 |    19   18   14   17   23   15   21   14   16   24    14
  18  |   11   11   13   18   12    4   11   13   10   27    5 |    19   22   20   22   20   14   20   19   20   24    16
  19E |   13   14    6   11   16    4   11   16    8    8    4 |    52   48   46   52   46   44   45   50   48   45    47
  20  |   10    8   11   14   10    5    8   10    9   32    4 |    22   19   21   24   14   18   20   17   18   21    17
  21  |   10   13   14    7   12    5   16   12   15   26    4 |    22   26   19   19   23   14   25   19   22   14    18
  22  |   20    8   14    9   12    5   11    9    9   18    4 |    30   24   21   18   25   16   20   21   22   27    19
  23  |    9   11    9    9   11    5   17   11    7   21    4 |    43   43   40   42   46   40   40   41   44   43    41
  24  |   12   11   16    9   15    6   15   10   11   17    4 |    20   24   25   22   23   17   20   18   20   17    19
  25  |   14   10   15    7   16    6   14   14   11   20    4 |   774  771  772  770  499  771  494  774  774  773   772
  26E |   10   14   11   10   13   10   16   19   12   19    5 |   104  105  100  101  102   98  105  108  100  103   102
 X27E |    9   11   14    9  ---    4   11    7    9   13    4 |    23   20   28   25  ---   20   22   19   25   15    22
  28  |   11   14    9   16   16    6   15   15    7   18    5 |    21   25   16   24   25   17   19   15   19   23    16
  29E |   19   13    7   11   17    7   20   14   11   16    5 |    19   23   16   20   25   14   25   19   23   23    17
 X30  |    9    9   12    7  ---    4   13   16    5   13    4 |    47   48   47   45  ---   44   49   45   48   40    45
  31  |   17    9   13   10   14    6   12   13    9   15    4 |    27   26   17   26   35   16   21   24   26   12    22
  32  |   12    7   13   10    7    5    8   12    4   11    3 |    21   23   18   20   22   18   22   23   21   14    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   12   12   12   11   14    5   15   13   10   24      |T   71   73   69   72   68   66   65   70   71   72    68
 WRMS |   12   12   12   10   14    5   15   13    8   21      |NE  84   87   82   86   79   79   77   83   84   87    81
 MEDI |   11   11   12   10   14    5   14   12    9   18      |MD  23   26   21   24   27   18   22   22   23   24    20

Table 3.1797.6   GPS week: 1797   Day: 6   MJD: 56829.000                            

        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  |    5    7   11    8    9    8   13   10   13   16    3 |   451  451  450  449  444  453  352  453  453  454   451
   2  |    8   14   13   10   17    7   12   15   11   26    4 |    19   31   21   21   24   18   24   31   24   32    21
   3E |    8   17   12   10   15    7   16   14   20   22    5 |    29   37   30   28   34   24   31   25   36   27    28
   4  |    8   13   12    8   10    6    7    9   13   64    4 |    23   31   26   29   32   25   28   32   29   79    27
   5  |   15   11   13    8   13    6   14   13   11   35    4 |    44   47   43   41   44   40   45   40   41   43    41
  X6  |   14  ---   13   12   83   10  ---   14   13   35    6 |    81  ---   79   70  127   73  ---   70   70   67    74
   7  |   11   13   10   10   12    6   17   14   11   13    4 |    20   26   15   22   30   16   22   23   25   14    19
   8  |    7    8   10    9   13    5    7    9   11   31    3 |    17   21   18   15   23   13   18   15   20   27    16
  X9  |   11  ---   11  ---  ---   24  ---  ---  ---  ---   11 |    24  ---   24  ---  ---   22  ---  ---  ---  ---    27
  10  |    8   10    9    6   15    4    9   11    9   18    3 |    30   33   25   31   41   28   29   33   32   32    30
  11  |    9    8   15   10   16    5   11   11    8   11    4 |    43   47   37   45   54   41   43   42   39   39    42
  12  |   14   14    9   15   18    8   15   15   11   16    5 |    22   27   13   24   26   16   21   18   18   17    17
  13E |    8   12    9    9   12    5   13    8    8   13    3 |    23   26   20   20   28   19   23   23   21   19    21
  14  |   11   11    7   11   18    9   13    8   10   12    4 |    40   43   41   41   42   40   43   42   42   42    40
  15  |   11   15   11   10   24    5   19   16   10   22    5 |    25   28   19   26   33   21   26   24   27   30    22
  16  |   10   14    9   13   10    7   14   15   13   17    4 |    18   23   13   20   21   14   19   20   19    9    16
  17E |   12   13    8   13   21    6   22   11   15   11    5 |    26   24   21   23   28   21   27   21   22   28    21
  18  |   11    9   12   17   11    6   11   12   13   26    4 |    20   27   19   22   25   16   23   25   23   20    19
  19E |    7   10    7   13   13    5   11   12    7   12    4 |    36   37   30   41   37   34   33   36   36   31    34
  20  |   11    9   12   13   11    7    9   11   11   34    4 |    23   25   20   27   23   20   21   19   25   37    20
  21  |   18   11   15    7   11    6   15   10   14   28    5 |    31   32   22   28   31   24   31   27   28   24    26
  22  |    8    9   12    8   11    5    9    9   15   18    4 |    25   31   25   30   31   24   29   29   34   34    27
  23  |   10   11   10   11   13    4   16    9   10   19    4 |    47   44   38   51   52   42   40   44   44   43    44
  24  |   11   11   15    9   16    7   14   13   10   12    4 |    21   25   26   21   25   16   23   22   21   18    21
  25  |    9    8   16    8   16    5   12   15   12   13    4 |   585  586  582  585  392  587  396  588  587  586   585
  26E |    9   12   12   11   15    8   15   19   11   16    5 |   130  134  130  130  135  127  134  139  131  134   132
 X27E |    7   13   15   11  ---    3   11    7    8   19    4 |    23   19   29   24  ---   18   22   20   22   20    21
  28  |    8   12    9   14   16    6   11   20   10   16    5 |    18   24   14   20   28   15   19   23   17   20    16
  29E |   13   18    9   10   15    8   21   11   12   15    5 |    26   26   20   24   27   19   25   21   27   25    21
 X30  |    7    8   12    8  ---    4   12   11   14   15    4 |    32   35   37   35  ---   31   36   29   41   33    34
  31  |   11   11   11   11   14    6   13   17   13   14    4 |    26   26   13   24   33   18   22   22   21   14    20
  32  |   16    8   10   10    9    4    7   12    8   15    4 |    22   27   18   22   27   19   24   25   22   18    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   12   11   11   15    6   14   13   12   23      |T   62   66   59   64   65   59   54   63   64   65    61
 WRMS |   11   12   11   10   15    6   14   12   10   22      |NE  70   76   67   73   72   67   59   73   73   74    69
 MEDI |   10   11   11   10   14    6   13   12   11   16      |MD  25   28   24   27   31   21   26   25   27   30    22



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 4.1797   GPS week: 1797   MJD: 56823.0-56829.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3041 |U    7     5    15 |U    6     7    21 |U    7     9    18 |
emr | emr 2949 |    10     6    21 |U    7     8    23 |     8     9    20 |
esa | esa 3044 |     8     5    16 |U    6     8    24 |     9    11    19 |
gfz | gfz 2967 |U    7     5    15 |U    6     8    23 |U    8    10    20 |
grg | grg 2770 |U    9     6    18 |U   10    14    40 |U    9    11    23 |
igr | igr 3011 |     8     5    16 |     6     7    21 |     9    11    21 |
igs | igs 3030 |     8     4    15 |     6     9    27 |     8    10    19 |
jpl | jpl 2844 |    10     6    23 |     8    12    34 |     9    10    23 |
mit | mit 3058 |    10    16    18 |U    6    10    29 |U    8    11    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 5.1797.0   GPS week: 1797   Day: 0   MJD: 56823.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3039 |    13     4    24 |     6     6    19 |     7     9    17 |
emr | emr 2955 |    17     7    31 |     7     8    26 |     8     9    19 |
esa | esa 3072 |    16     6    29 |     6     7    24 |     7     9    18 |
gfz | gfz 2968 |    15     4    26 |     7     7    25 |     7     8    17 |
grg | grg 2784 |    16     7    28 |    11    17    37 |     9    11    21 |
igr | igr 3034 |    15     5    27 |     6     7    24 |     7    10    18 |
igs | igs 3030 |    14     4    25 |     6     9    30 |     7     9    18 |
jpl | jpl 2871 |    19     7    36 |     9    23    44 |     9     9    24 |
mit | mit 3072 |    15     5    27 |     7    16    45 |     8    10    18 |

Table 5.1797.1   GPS week: 1797   Day: 1   MJD: 56824.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3037 |     5     3    13 |     7     8    27 |     7     7    18 |
emr | emr 2966 |     8     6    21 |     9    10    29 |     9     8    21 |
esa | esa 2976 |     6     4    11 |     7     8    34 |     8     9    19 |
gfz | gfz 2968 |     5     3    11 |     8    12    29 |     7     6    19 |
grg | grg 2784 |     7     5    12 |    12    19    49 |    10    11    23 |
igr | igr 3035 |     5     4    13 |     6     8    27 |     7    10    23 |
igs | igs 3026 |     5     3    11 |     7    10    32 |     7     8    19 |
jpl | jpl 2872 |     7     6    20 |     7    11    50 |     8     7    22 |
mit | mit 3072 |     6     4    11 |     7    10    34 |     7     8    18 |

Table 5.1797.2   GPS week: 1797   Day: 2   MJD: 56825.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3042 |     5     5    11 |     8     6    22 |     7     9    14 |
emr | emr 2962 |     8     4    15 |     7     8    23 |     7     7    18 |
esa | esa 3072 |     6     4    11 |     7     7    28 |     8     9    14 |
gfz | gfz 2965 |     5     5    11 |     7     6    23 |     7     7    16 |
grg | grg 2783 |     7     5    15 |    11    18    45 |     8     9    20 |
igr | igr 3045 |     5     4    12 |     7     5    22 |     7     9    14 |
igs | igs 3037 |     5     4    11 |     7     9    33 |     6     8    14 |
jpl | jpl 2869 |     8     4    17 |     9    11    38 |     8     7    17 |
mit | mit 3072 |    26    64    20 |     7     9    34 |     6    10    14 |

Table 5.1797.3   GPS week: 1797   Day: 3   MJD: 56826.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3045 |    11     6    13 |     6     6    19 |     8    10    20 |
emr | emr 2965 |    12     6    19 |     7     8    17 |     7     9    16 |
esa | esa 2976 |    11     6    13 |     7     7    20 |    10    13    20 |
gfz | gfz 2968 |    11     5    11 |     5     8    20 |    10    12    20 |
grg | grg 2688 |    12     9    18 |    11    19    47 |    10    11    23 |
igr | igr 3032 |    11     6    12 |     5     6    16 |    11    14    22 |
igs | igs 3003 |    11     5    13 |     6     7    21 |     9    12    21 |
jpl | jpl 2776 |    13     7    23 |    10    11    36 |     8    11    22 |
mit | mit 3072 |    11    13    31 |     6     6    21 |     8    10    20 |

Table 5.1797.4   GPS week: 1797   Day: 4   MJD: 56827.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3058 |     7     5    14 |     7    11    29 |     8     9    18 |
emr | emr 2956 |     8     5    19 |     8     8    29 |     9     9    22 |
esa | esa 3072 |     6     4    15 |     7    12    25 |     9    12    18 |
gfz | gfz 2968 |     7     5    15 |     7    10    29 |     9    11    21 |
grg | grg 2784 |     8     6    17 |    11    10    42 |     9    11    23 |
igr | igr 3048 |     6     4    15 |     7    13    23 |     9    12    20 |
igs | igs 3027 |     7     4    16 |     7    10    29 |     8    11    20 |
jpl | jpl 2776 |     9     5    24 |    10    16    26 |    13    14    26 |
mit | mit 3072 |     5    12    13 |     6    11    28 |     9    13    20 |

Table 5.1797.5   GPS week: 1797   Day: 5   MJD: 56828.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3033 |     5     6    18 |     5     5    14 |     7     8    23 |
emr | emr 2965 |     9     7    26 |     5     6    19 |     7     9    24 |
esa | esa 3072 |     7     6    23 |     6     7    16 |     8    10    23 |
gfz | gfz 2968 |     6     7    20 |     5     7    17 |     8    10    26 |
grg | grg 2784 |     9     8    25 |     8     9    28 |     9    11    27 |
igr | igr 3012 |     6     7    22 |     5     6    15 |     8    11    25 |
igs | igs 3065 |     7     6    21 |     6     8    23 |     7    10    24 |
jpl | jpl 2872 |     8     5    26 |     6     9    23 |     8    11    25 |
mit | mit 3072 |     7    10    17 |     7     7    19 |     8    12    25 |

Table 5.1797.6   GPS week: 1797   Day: 6   MJD: 56829.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3033 |     5     4    13 |     5     6    20 |     8    12    19 |
emr | emr 2876 |     7     5    15 |     6     5    19 |    10    11    22 |
esa | esa 3072 |     5     5    13 |     5     6    19 |    10    13    19 |
gfz | gfz 2967 |     4     5    11 |     5     5    17 |    10    12    21 |
grg | grg 2784 |     6     5    13 |     9     9    31 |    12    14    24 |
igr | igr 2871 |     5     5    12 |     5     7    17 |    11    14    23 |
igs | igs 3026 |     5     5    12 |     6     7    25 |    10    13    20 |
jpl | jpl 2876 |     6     6    17 |     6     6    22 |     9    13    23 |
mit | mit 2976 |     4     4    11 |     6     6    22 |     9    11    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 6.1797   GPS week: 1797   MJD: 56823.500-56829.500

                                                         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 |      -8       7     -12      99      1 |      11     19
            |      26      18      87      66      4 |       3
emr   uuuuu |      63      12     -28     124      5 |      40     44
            |      12      25      93      29     11 |       3
esa   uuuuu |     -34      -7      47    -112      1 |      11     19
            |      18      18      71      75      3 |       2
gfz   uuuuu |      -6       6      50      71     -5 |      -2     19
            |      25      15     145      99      4 |       2
grg   uuuuu |      27     -21      13      49      1 |      39     42
            |      21      22     109      87      5 |       3
igr   xxxxx |      -4      -1      28     -76      6 |      -2     16
            |      21       8      28      43      5 |       4
irf   xxxxx |       0      -4     -44     -49      1 |       0     17
            |      11       8      50      24      2 |       3
jpl   uuuuu |     -40     -44     -19     -59      1 |      13     21
            |      33      22      46      67      5 |       3
mit   uuuuu |      -7       1    -116    -102      1 |      24     29
            |      25      12      97      40      5 |       3
ngs   uuuuu |       6      31      26     -99      0 |      10     18
            |      50      60     156     154      8 |       2
sio   xxxxx |     -16      15      74    -158     -6 |      53     55
            |      17      15      64      75      6 |       3


Table 7.1797.0   GPS week: 1797   Day: 0   MJD: 56823.500

                                                         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     -10     -58      84      1 |      13     24
emr   uuuuu |      44       6     -16     125     -2 |      42     47
esa   uuuuu |     -62      -7     -31    -138     -1 |      12     22
gfz   uuuuu |     -38     -13     243      -3     -4 |       2     22
grg   uuuuu |      44     -51      19      23     -2 |      41     46
igr   xxxxx |     -27     -10      16    -119      6 |      -4     20
irf   xxxxx |     -14     -16     -19     -52      2 |       1     22
jpl   uuuuu |       1     -50      46    -119     -1 |      17     28
mit   uuuuu |     -25       1     -79    -101      2 |      26     34
ngs   uuuuu |      94     125     -95      94      4 |      10     20
sio   xxxxx |     -23      26      51    -210     -9 |      58     61

Table 7.1797.1   GPS week: 1797   Day: 1   MJD: 56824.500

                                                         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 |      14       0    -142     197      0 |      10     22
emr   uuuuu |      67      39     -57      86     11 |      39     44
esa   uuuuu |     -47      -2       1    -244      6 |      10     20
gfz   uuuuu |     -33     -17     235     -32     -9 |      -2     20
grg   uuuuu |      47     -52     165      88     -2 |      38     43
igr   xxxxx |     -37       0      45    -109     14 |      -6     19
irf   xxxxx |     -16     -13      31     -85      4 |      -2     20
jpl   uuuuu |     -42      -4       7    -146      2 |      14     25
mit   uuuuu |     -53     -13      24    -124      6 |      23     31
ngs   uuuuu |      49      43    -196     121     -2 |       9     19
sio   xxxxx |     -42      24      72    -284     -5 |      55     58

Table 7.1797.2   GPS week: 1797   Day: 2   MJD: 56825.500

                                                         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      22     -39     170      1 |       7     19
emr   uuuuu |      78      44     -63     138     12 |      36     40
esa   uuuuu |      -4      26     -21     -48      4 |       8     18
gfz   uuuuu |     -17      17      90      -5     -1 |      -6     20
grg   uuuuu |      22     -11     140     -23     -6 |      35     40
igr   xxxxx |      12      12      24     -13     11 |      -7     19
irf   xxxxx |       7       2      -2     -55      0 |      -4     19
jpl   uuuuu |     -78     -37     -14     -73      9 |       9     19
mit   uuuuu |      -4      -3     -34    -105      2 |      20     27
ngs   uuuuu |     -46     -76     -41    -125    -15 |       8     18
sio   xxxxx |       4      28     183    -138    -11 |      51     54

Table 7.1797.3   GPS week: 1797   Day: 3   MJD: 56826.500

                                                         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 |     -50       7      -1      24      8 |       7     19
emr   uuuuu |      59      13    -132     138     -9 |      38     42
esa   uuuuu |     -35      -2      87     -65      1 |       9     19
gfz   uuuuu |      -1      20     -13      50     -8 |      -5     21
grg   uuuuu |      47     -12     -37      46      5 |      35     40
igr   xxxxx |      12      -3      58    -112      5 |      -4     20
irf   xxxxx |       2      -7     -66     -51      4 |      -4     20
jpl   uuuuu |       0     -35     -32      31      4 |      10     21
mit   uuuuu |      10     -11    -151    -114      6 |      21     28
ngs   uuuuu |      -1       4     194     -98     -6 |       8     18
sio   xxxxx |      -5      29     135    -131      5 |      50     52

Table 7.1797.4   GPS week: 1797   Day: 4   MJD: 56827.500

                                                         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 |      -1      10      50      44      2 |      11     17
emr   uuuuu |      50       9     -81      89     20 |      40     43
esa   uuuuu |     -27      -7      25     -30      1 |      11     17
gfz   uuuuu |      30      12     -95     185     -7 |      -3     17
grg   uuuuu |      11     -15       2     106      4 |      38     41
igr   xxxxx |      10      -7      59     -74      4 |      -1     13
irf   xxxxx |       1       3    -112     -57     -1 |       0     14
jpl   uuuuu |     -41     -75      12     -92     -4 |      13     19
mit   uuuuu |       7      21    -275    -164     -4 |      24     27
ngs   uuuuu |     -27      33     235    -209      6 |       9     17
sio   xxxxx |     -11       6      37    -183     -9 |      52     53

Table 7.1797.5   GPS week: 1797   Day: 5   MJD: 56828.500

                                                         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     -17     135     122     -6 |      13     18
emr   uuuuu |      73       1      -8     167     13 |      43     46
esa   uuuuu |     -31     -34     122    -160     -1 |      13     18
gfz   uuuuu |      19      17    -113     226     -2 |      -2     16
grg   uuuuu |      -8      -6     -56     -81     10 |      41     43
igr   xxxxx |     -15      -4     -19     -85     -1 |       2     12
irf   xxxxx |       3       2     -86     -38      0 |       2     13
jpl   uuuuu |     -81     -63     -83     -31     -4 |      13     19
mit   uuuuu |      -5       6    -150     -66     -1 |      26     29
ngs   uuuuu |      12      55      89    -191     10 |      11     18
sio   xxxxx |     -31       0      39    -101     -1 |      52     53

Table 7.1797.6   GPS week: 1797   Day: 6   MJD: 56829.500

                                                         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      36     -29      52      2 |      14     17
emr   uuuuu |      71     -30     160     122     -6 |      46     48
esa   uuuuu |     -33     -20     145    -100     -2 |      14     18
gfz   uuuuu |       2       9       3      79      1 |      -1     15
grg   uuuuu |      30       0    -144     182      2 |      43     45
igr   xxxxx |      15       7      12     -23      4 |       3     10
irf   xxxxx |      16      -1     -58      -6     -2 |       3     11
jpl   uuuuu |     -35     -47     -68      15      0 |      15     18
mit   uuuuu |      21       8    -151     -40     -7 |      27     29
ngs   uuuuu |     -35      32      -5    -288      2 |      13     18
sio   xxxxx |       0      -6      -4     -59    -10 |      52     53



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