[IGSREPORT-22748] Wk 1791 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Fri May 23 12:11:31 PDT 2014


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1791   (May 04, 2014 - May 10, 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:

igs1791[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1791[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1791[0-6].cls  IGS GPS clock combination summary report.
igs17917.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs17917.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   | GRAZ MAL2
                0  |  EMR   | FAIR FAIR MCM4 YAKT
                0  |  ESA   | DRAG WUHN
                0  |  GFZ   | 1 2 1 IRKJ MAL2 IRKJ MAL2
                0  |  GRG   | DRAG HYDE KELY NYA1 RBAY WUHN HYDE KELY NTUS NYA1
                0  |  GRG   | RBAY WUHN
                0  |  MIT   | ALRT IRKJ ALRT BRFT IRKJ MDVJ NTUS
                1  |  EMR   | WUHN WUHN
                1  |  ESA   | BRMU BOGT BRMU
                1  |  GFZ   | 1 2 1 BOR1 BRMU WUHN BRMU WUHN
                1  |  GRG   | ALRT GRAZ RBAY ZIMM ALRT GRAZ RBAY ZIMM
                1  |  MIT   | MAW1 ONSA MAW1 ONSA
                2  |  COD   | NTUS
                2  |  EMR   | YAKT
                2  |  GFZ   | 1 2 1 ISPA NTUS ISPA NTUS
                2  |  GRG   | HOLB HYDE KELY MAL2 MOBS NTUS RBAY ALRT HYDE KELY
                2  |  GRG   | MAL2 MOBS RBAY
                2  |  MIT   | 23 23 TLSE BRFT HNPT MDVJ TLSE
                3  |  COD   | BOR1 REUN BOR1 REUN
                3  |  EMR   | YAKT
                3  |  ESA   | UNSA
                3  |  GFZ   | 1 2 1 DRAG DRAG
                3  |  GRG   | KELY PIMO RBAY SHAO KELY PIMO RBAY SHAO
                3  |  JPL   | 29 CHAN SHAO
                3  |  MIT   | REUN MDVJ REUN
                4  |  EMR   | MCM4 TSKB WUHN MCM4 SCH2 TSKB WUHN YAKT
                4  |  GFZ   | 1 2 1 DAEJ WUHN WUHN
                4  |  GRG   | DAEJ MAC1 MAW1 RBAY MAC1 MAW1 RBAY
                4  |  JPL   | TIXI
                4  |  MIT   | DAV1 DAV1 MAC1 MAW1 MDVJ
                5  |  EMR   | YAKT
                5  |  ESA   | IRKJ WUHN IRKJ WUHN
                5  |  GFZ   | 1 2 1 QAQ1 QAQ1
                5  |  GRG   | ALRT IRKJ MOBS ALRT BOR1 IRKJ MAL2 MOBS
                5  |  MIT   | KOUR MDVJ PARC
                6  |  COD   | KARR ONSA MAW1 ONSA
                6  |  EMR   | MCM4 MCM4 WES2
                6  |  ESA   | IRKJ NTUS IRKJ
                6  |  GFZ   | 1 2 1 NTUS ONSA NTUS ONSA
                6  |  GRG   | IRKJ KELY WUHN IRKJ KELY MAW1
                6  |  JPL   | CAS1
                6  |  MIT   | ONSA CONZ MDVJ XMIS

    
 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
               ----+--------+--------+-------------
                4  |  EMR   | ~20:33 | ~ 0.28 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 table lists all maneuvered satellites for this week. The
    solutions from COD and ESA, which modeled the maneuver, are used that day for
    combination, if available. An associated accuracy code of 0 (unknown) is given
    if only one AC is left (no redundancy). For the long arc evaluation the arc is
    split into two parts at the given maneuver epoch.
    
               PRN |    Date    | Ref. NANU
               ----+------------+----------
               G23 | 2014_05_08 | 2014041 
               G23 | 2014_05_09 | 2014041 

 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 |    -.3     .1    -.6     -19      8    -22     .64
       EMR  |   0 |    2.0   -5.9   20.0       1     -6    -25     .62
       ESA  |   0 |     .0     .7   -1.4       9      3     15     .51
       GFZ  |   0 |    -.2     .1   -1.3      -3    -22     -5     .11
       GRG  |   0 |    2.0   -5.9    7.0      -8      6    -10     .63
       JPL  |   0 |    6.9   -9.3   21.5     -14    -10     84    -.14
       MIT  |   0 |   -2.5   -2.5   17.9      43     12     11     .51
       NGS  |   0 |     .9   -6.8   23.6     -53      1     -6     .54
       SIO  |   0 |   -2.8     .5  -18.4       7    -29     20     .52

       COD  |   1 |   -1.2     .4   -1.4     -26     12    -17     .51
       EMR  |   1 |    6.7  -12.3   16.4       3      8    -49     .53
       ESA  |   1 |     .0     .3   -1.0     -11      0      2     .35
       GFZ  |   1 |     .3    -.5   -1.8     -18    -28    -13     .11
       GRG  |   1 |    2.4   -7.4   13.1     -16     26    -12     .39
       JPL  |   1 |    1.3   -7.1   21.4     -54     -8     76     .04
       MIT  |   1 |   -3.6   -4.9   13.7      10     10    -39     .49
       NGS  |   1 |   -4.4  -13.9   18.7    -105     26    -28     .43
       SIO  |   1 |   -1.8    1.1  -29.1      17     -1   -123     .40

       COD  |   2 |    -.8     .2   -1.3     -34     20    -29     .51
       EMR  |   2 |    5.3    2.1    8.9      -6     -3    -29     .45
       ESA  |   2 |     .3    1.0   -1.1      -8    -12     20     .42
       GFZ  |   2 |    -.1    -.4   -1.9     -21    -21    -20     .28
       GRG  |   2 |    6.3    -.8   11.5     -12      9    -20     .67
       JPL  |   2 |    3.9    1.9   14.2     -15      6     49     .49
       MIT  |   2 |    -.5   -4.9   14.4      -6     -4    -36     .59
       NGS  |   2 |     .8  -12.4   11.2     -80     -5     -9     .75
       SIO  |   2 |    7.5   -2.1  -25.5     -24     -1     76     .44

       COD  |   3 |    -.7     .7   -1.1     -32     19    -23     .67
       EMR  |   3 |   11.7   -1.5    7.2       0     -6    -33     .68
       ESA  |   3 |     .5    1.0   -2.0     -11    -21     32     .57
       GFZ  |   3 |    -.6     .3   -2.2     -15    -12    -12     .22
       GRG  |   3 |   17.3   -7.9    9.0      -8     -1    -18     .69
       JPL  |   3 |   12.9   -4.2   20.2     -26    -16     15    -.35
       MIT  |   3 |    3.8   -5.2   13.1      -2     -4    -34     .74
       NGS  |   3 |    5.3  -12.1   18.8     -81    -26      8     .70
       SIO  |   3 |   10.9   -3.9  -37.0      20     11   1951     .54

       COD  |   4 |   -1.2     .3   -1.4     -18     39    -40     .58
       EMR  |   4 |   10.7   -1.7    7.7      14      5    -34     .39
       ESA  |   4 |     .7     .3   -1.2     -10    -15     12     .33
       GFZ  |   4 |     .2     .2   -1.2     -12    -31     -6    -.22
       GRG  |   4 |   14.3   -3.7   16.2     -13     17    -36     .68
       JPL  |   4 |    9.6   -8.7   16.8      -8     11     66    -.56
       MIT  |   4 |    5.9   -6.9   10.2      -3     16    -53     .57
       NGS  |   4 |     .8    -.3    9.0     -12     -7     12     .41
       SIO  |   4 |    6.2   -1.1  -19.7      -6    -11    -71     .43

       COD  |   5 |   -1.1     .1   -1.7     -25     16    -36     .59
       EMR  |   5 |   11.7   -2.7    7.6      -5      6    -31     .39
       ESA  |   5 |     .5     .4   -1.3     -15    -29     21     .28
       GFZ  |   5 |     .2     .4   -1.6     -20    -27    -13    -.07
       GRG  |   5 |   13.0   -6.6   10.8     -19     10    -21     .55
       JPL  |   5 |    3.4   -6.5    7.5     -47     48      7    -.09
       MIT  |   5 |    4.9   -7.2   17.3       3    -21    -46     .48
       NGS  |   5 |    8.8  -11.0   22.7    -101    -41     18     .49
       SIO  |   5 |    9.3   -1.8  -28.0       3     -1     95     .39

       COD  |   6 |    -.1     .1    -.7     -18     21    -37     .61
       EMR  |   6 |    8.5   -6.5    3.8       6     12    -28     .58
       ESA  |   6 |     .9     .5   -1.2     -14    -30     29     .51
       GFZ  |   6 |     .9     .1   -1.8       4    -18    -13     .28
       GRG  |   6 |    3.2   -3.7    5.4      -1     21    -58     .63
       JPL  |   6 |    2.9   -4.6   23.0     -70     43      5    -.55
       MIT  |   6 |    6.5   -9.2   14.2     -14     22    -82     .60
       NGS  |   6 |   10.5   -2.3   17.4     -53    -52     32     .60
       SIO  |   6 |    7.9   -4.6  -37.8      45    -31   2991     .33


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 1.1791.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1791.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 2.1791.[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 3.1791.[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 5.1791.0-6). 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 1791 summary.                       (May 04, 2014 - May 10, 2014)

Table 1.1791.a   GPS week: 1791   MJD: 56781.000-56787.000

         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  252|    0     0    -3    22    31   -13   .02    9    9 |   -1098     -31     16    108
        |    0     0     1    14    18    10   .02           |     203     219
emr   80|    0     0     0     0   -35    44   .29   12   12 |    3507    1000     13    122
        |    0     0     1    19    13    22   .02           |    1357     861
esa  150|    0     0    -4     2     5    -6  -.35   12   11 |    -615     152     10    167
        |    0     0     0    10    15    11   .02           |    1129    1186
gfz  199|    0    -1     0    -7    -1    -5   .08   11   11 |    -157     459     10    119
        |    0     1     0    12    22     7   .03           |     547     964
grg  181|    3     0    10   -33   -14     1   .24   15   15 |    -132     205     15    156
        |    0     0     2    15    16    12   .03           |     227     506
igr  n/a|    0     0    -1     0    25   -14  -.18    5    5 |   10592     980     16     78
        |    0     0     1    14    12    16   .01           |    1485     912
jpl   80|    0     2    -2     4    -6    20   .06   13   12 |    2495    1025     16    133
        |    0     1     2     8    16    16   .03           |    1502     860
mit  299|    0     0     4     9    -2     2  -.20   13   11 |    -121      54     22    198
        |    1     0     1    22    31    16   .03           |     202     340
ngs  228|    0     0     0   -12     3   -24  -.06   12   10 |   -1075     -62   1772   3476
        |    1     0     2    37    12    22   .03           |     212     232
sio  488|    0     0    -7    -9   -40   702  -.74   22   21 |     ---     ---    ---    ---
        |    0     0     2    26    70  1260   .09           |     ---     ---


Table 1.1791.b   GPS week : 1791   MJD: 56781.000-56787.000   

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

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    4    4    4    4    4    5    5 |
   2  |    4    4    4    4    4    4    4 |
   3  |    4    4    4    4    4    5    4 |
   4  |    4    4    3    3    4    4    3 |
   5  |    5    6    5    5    5    6    5 |
   6  |    0    0  ---  ---  ---  ---  --- |
   7  |    5    4    4    4    4    5    4 |
   8  |    4    4    3    4    4    3    3 |
   9  |    4    4    4    3    4    4    4 |
  10  |    4    4    4    4    4    4    4 |
  11  |    4    4    4    4    4    5    4 |
  12  |    5    5    5    6    6    6    6 |
  13  |    5    5    5    5    5    5    5 |
  14  |    4    4    5    5    5    5    5 |
  15  |    6    6    6    6    6    6    6 |
  16  |    5    5    5    5    5    5    5 |
  17  |    6    5    5    5    5    5    5 |
  18  |    5    5    5    5    5    5    5 |
  19  |    5    5    4    5    5    5    5 |
  20  |    4    4    4    5    5    5    5 |
  21  |    4    4    4    4    4    5    4 |
  22  |    5    5    4    4    4    4    4 |
  23  |    5    5    5    5    0    0    4 |
  24  |    4    5    4    4    4    4    4 |
  25  |    5    5    5    5    5    5    5 |
  26  |    4    4    4    4    4    4    4 |
  27  |    5    6    4    5    4    5    5 |
  28  |    4    4    4    4    4    4    4 |
  29  |    5    6    5    6    6    5    5 |
  30  |    0    0    0    0    0    0    0 |
  31  |    5    6    5    5    5    5    5 |
  32  |    4    5    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 2.1791.0   GPS week: 1791   Day: 0   MJD: 56781.000                            

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     0    -1     0    37   -25   .03    9    9 |    -966    -249     16    104
emr   80|    0    -2     3   -10   -41    37   .28   12   12 |    1329    1070     15    140
esa  150|    0     0    -4     4    28   -10  -.34   12   11 |    -302     554     11    160
gfz  199|    0     0     0    -3    18   -15   .05   12   12 |    -354       5     10    119
grg  183|    3     0     4   -47   -37     7   .23   15   15 |     -97    -351     16    193
igr  n/a|    0     0    -2   -30    16   -33  -.17    5    5 |    8172     956     17     87
jpl   80|    0     1    -3     6    -9    31   .10   13   12 |     250     612     17    142
mit  299|    0     0     3    17   -37    18  -.19   14   13 |    -136    -229     23    199
ngs  228|    0     0     2    23    10   -25  -.12   11   10 |    -954    -274   1582   3155
sio  497|    0     1    -6   -26   -30     9  -.63   24   20 |     ---     ---    ---    ---

Table 2.1791.1   GPS week: 1791   Day: 1   MJD: 56782.000                            

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     0    -4    38    46   -18   .06   10   10 |    -855    -274     21     98
emr   80|    1     0     0   -11   -24    37   .29   13   13 |    2308    2333     16    121
esa  150|    0     0    -3    17    17   -30  -.37   11   11 |    -686     452     10    160
gfz  202|    0     0    -1   -21   -12   -12   .07   12   12 |    -938    2165     12    129
grg  187|    4     0     9   -26   -26     6   .26   15   14 |    -349     847     16    138
igr  n/a|    0     0    -2     6    12   -20  -.18    5    5 |    9205    2580     17     78
jpl   80|    0     1    -3     7   -20    40   .05   13   12 |     987    2514     19    151
mit  299|   -1     0     3    48     4    -7  -.18   13   12 |    -290     598     26    164
ngs  229|   -2    -1     2   -44    -6     6  -.07   12   11 |    -850    -275   1915   3882
sio  494|    0     1    -8    32     5  -122  -.64   22   20 |     ---     ---    ---    ---

Table 2.1791.2   GPS week: 1791   Day: 2   MJD: 56783.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  254|   -1     0    -2    28     0    -9  -.00    7    7 |   -1007      63     14    108
emr   80|    1     0     0   -11   -48    30   .31   13   13 |    3110     483     12    121
esa  150|    0     0    -4    -7     7    -3  -.36   11   11 |     741    -395      9    170
gfz  203|   -1     0     0   -23    -4     1   .08   10   10 |     714    -680     10    118
grg  186|    3     0    10   -26     7    -1   .29   14   13 |     209    -605     15    138
igr  n/a|    0     0    -2     9     7   -33  -.20    5    5 |   10197     644     17     67
jpl   80|    0     2     0    21    19    21   .02   13   13 |    1933     697     15    120
mit  300|   -1     0     3    13    32    -6  -.17   13   11 |     187    -481     21    207
ngs  227|    0     0    -1    -1    -1   -17  -.03   10    9 |    -932     -48   1479   3174
sio  496|    0     0    -6    10  -197    13  -.75   23   21 |     ---     ---    ---    ---

Table 2.1791.3   GPS week: 1791   Day: 3   MJD: 56784.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  252|   -1     0    -4    15    53    -2   .01    8    8 |   -1471     364     18    110
emr   80|    0     0     0   -15   -49    35   .28   12   12 |    3832    1550     12    112
esa  150|    1     0    -3    15     5    -3  -.32   11   11 |    -171     -24     12    160
gfz  198|    0     0     0     0   -11    -9   .07   12   12 |     391    -361     11    114
grg  180|    3     0    12   -31   -10     9   .25   15   14 |    -219     358     15    129
igr  n/a|    0     0    -2    -3    37   -10  -.19    5    4 |   11130    1539     16     77
jpl   80|   -1     5    -3     0   -28    20   .07   13   12 |    2875    1649     18    130
mit  300|   -1     0     4    11    -3     0  -.19   12   11 |    -198     121     20    194
ngs  230|    1    -1     1    -5    10   -27  -.08   10    9 |   -1486     385   2000   3556
sio  481|    0     1    -7     6   -11  1962  -.76   22   21 |     ---     ---    ---    ---

Table 2.1791.4   GPS week: 1791   Day: 4   MJD: 56785.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  246|    0     0    -2    15    31   -19   .04    7    8 |   -1013    -115     14    106
emr   80|    0     0     0    -2   -14    24   .27   11   11 |    4830      26     15    125
esa  150|    0     0    -3   -11    -2     6  -.38   12   12 |   -2891    1774     11    176
gfz  199|    0    -2     0    -6     6    -2   .08   11   11 |    -423     482     10    121
grg  179|    4     0    11   -54   -18    -7   .20   16   17 |      21     359     15    195
igr  n/a|   -1     0    -1    -3    31     5  -.18    5    4 |   12149     -84     14     88
jpl   80|    0     4     0     1   -12    32   .06   13   12 |    4056       1     17    140
mit  300|   -1     0     4    -5    -9     6  -.26   13   12 |      10      45     23    210
ngs  228|    0    -1    -2    38   -14    -2  -.04   13   11 |   -1007    -116   1596   3422
sio  488|   -1     0    -7   -36   -33   -50  -.79   22   23 |     ---     ---    ---    ---

Table 2.1791.5   GPS week: 1791   Day: 5   MJD: 56786.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  250|    0     0    -3    42    35   -22   .00   11   11 |   -1202     -76     15    121
emr   80|    0     0    -2    13   -27    52   .30   12   12 |    4023    1493     14    124
esa  150|    0     0    -3     0     2    -3  -.34   12   12 |    -105   -2055     10    183
gfz  199|    0    -2    -1    11    29     0   .05   11   11 |    -298     441     10    115
grg  179|    3     0     9   -37   -19    16   .20   16   14 |    -456     296     14    159
igr  n/a|    0     0    -2    12    38   -16  -.17    5    5 |   11227    1164     15     72
jpl   80|   -1     2    -4     2     6    -2   .08   12   12 |    3180    1328     15    132
mit  300|    0     0     4     4   -42    25  -.21   12   10 |    -414     121     22    225
ngs  228|    1     1     4   -69     2   -57  -.06   13   12 |   -1126    -177   1832   3540
sio  481|    0     0   -11   -28   -10    88  -.70   22   20 |     ---     ---    ---    ---

Table 2.1791.6   GPS week: 1791   Day: 6   MJD: 56787.000                            

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     2    -2    20    12     0   .02    8    8 |   -1177      68     15    110
emr   80|    0     0     0    39   -42    91   .27   12   12 |    5118      46     13    114
esa  150|    0     0    -4     0   -20     0  -.34   12   12 |    -896     759     11    160
gfz  196|    0    -1    -1   -10   -37     1   .14   11   11 |    -193    1165     11    118
grg  179|    1     0    12    -7     6   -20   .23   15   14 |     -36     532     14    145
igr  n/a|    0     0     1     4    31     4  -.19    6    6 |   12070      61     17     82
jpl   80|    0     0    -5    -6    -1     0   .06   13   12 |    4187     375     16    119
mit  300|    1    -1     6   -24    39   -22  -.22   12   10 |      -7     208     25    188
ngs  228|    0     0     0   -27    23   -46  -.02   11   10 |   -1173      69   2000   3604
sio  483|    0     0    -4   -26    -8  3019  -.87   22   20 |     ---     ---    ---    ---

       
       
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 3.1791.0   GPS week: 1791   Day: 0   MJD: 56781.000                            

        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  |   11    7   12   12    9    4   14    8    9   13    4 |    41   41   35   42   48   34   44   37   37   29    39
   2  |   11    8   11   10   11    5   10   15    7   34    4 |    18   26   21   25   24   19   21   28   20   28    20
   3  |    7    8   10   10   11    5    8   12   10   43    3 |    32   29   31   29   24   26   28   25   34   51    28
   4  |   11    9   12   10   11    6   10   14   12   21    4 |    26   26   23   31   31   21   23   32   29   34    25
   5  |    9   12    9   15   19    3   15   23    9   17    5 |    24   25   16   24   28   17   24   19   24   18    19
  X6  |    3  ---  ---  ---  ---   68  ---  ---  ---  ---    0 |   ---  ---  ---  ---  ---  ---  ---  ---  ---  ---     0
   7  |    8   11   15   14   16    5   11   10   12   29    4 |    31   29   21   32   31   21   26   25   24   32    25
   8  |    5    8   12    8   12    5    8   14    8   16    3 |    24   25   21   24   20   20   23   27   23   25    21
   9  |    6    8   14    7   11    6   10   19   10   17    4 |    27   25   22   26   24   23   25   31   26   24    24
  10  |    7    8   11   10   12    6    9   15   13   25    4 |    24   29   24   23   23   20   27   24   25   37    23
  11  |    8    8   13   11   11    4   11    8    9   39    3 |    40   40   32   37   49   32   37   36   35   52    37
  12E |    9   13    8   12   25    5   19   13   11   11    5 |    28   26   21   32   21   21   24   25   25   23    23
  13  |    7   13   11   17   21    6   13   19   11   14    5 |    24   27   18   29   36   18   25   18   20   18    20
  14  |    8   13   10   12   16    6   12    7   10   19    4 |    23   22   17   26   26   18   20   17   20   21    19
  15  |   10   19   13   17   21    5   16   23   13   19    6 |    30   35   22   36   31   27   27   26   29   22    26
  16E |    7   19    8   13   12    5   17   12   18   13    5 |    28   25   22   28   27   23   24   23   33   20    24
  17  |   10   13   13   13   18   13   16   16   19   30    5 |    28   33   25   32   34   28   28   31   36   28    27
  18  |    9   13    9   13   19    5   13   10   12   18    4 |    26   27   22   24   26   21   25   20   24   19    21
  19  |    9   13   12   14   15    5   14   11    8   27    4 |    27   30   24   28   31   23   26   23   25   21    24
  20  |    8   11    9   12   15    4   14    9    9   20    4 |    24   24   21   18   22   18   23   17   23   26    19
  21  |    9    9   13   12   13    5   11    9   12   35    4 |    24   28   23   29   28   22   24   25   31   34    24
  22  |    8   10   10   10   18    4    9   13   15   18    4 |    25   24   20   25   31   19   22   18   27   19    21
  23  |    8   14    9   16   16    5   16   12   10   22    4 |    23   25   18   22   27   17   23   16   22   16    20
  24  |    8    8   13    9   17    5   11   13   10   11    4 |    24   26   24   25   27   19   28   19   19   12    22
  25E |    8   11   14    9   15    5   12   20   10   16    4 |    22   25   28   21   23   17   22   27   20   19    21
  26  |   10    8   11    9   13    4    8   14   10   18    4 |    23   24   19   20   18   18   20   17   21   21    19
 X27  |   13    9   12   14  ---    6   13    9   11   15    4 |    28   22   24   24  ---   20   26   21   23   15    21
  28E |    7   11   11   10   12    4   13   14   12   26    4 |    28   25   23   26   24   22   26   33   31   37    25
  29  |    9   15   13   16   15    6   17   12   11   28    5 |    32   36   34   35   28   29   33   27   31   34    30
 X30  |    3  ---  ---  ---  ---   13  ---  ---  ---  ---    0 |    30  ---  ---  ---  ---   22  ---  ---  ---  ---    29
  31  |   13   12   13   13   17    7   11   14   12   32    5 |    24   31   24   32   36   25   29   25   30   29    26
  32  |    8   12   11   12   15    6   10   16    9   18    4 |    31   29   29   24   24   26   28   30   27   29    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   12   11   12   15    5   13   14   11   24      |T   27   27   23   27   28   22   26   24   26   26    24
 WRMS |    9   12   11   12   15    5   12   13   10   20      |NE  27   28   23   27   29   22   26   24   26   26    24
 MEDI |    8   11   11   12   15    5   12   13   10   19      |MD  26   26   22   26   27   21   25   25   25   24    24

Table 3.1791.1   GPS week: 1791   Day: 1   MJD: 56782.000                            

        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    6   13   14   13    4   14   11    9   13    4 |    26   30   23   25   34   20   31   23   21   19    24
   2  |   12    7   12   11   12    4   11   13   11   26    4 |    17   21   19   20   21   16   18   22   19   20    17
   3  |    7    8   11   11   12    7    9   13   11   42    4 |    27   29   27   26   28   23   29   24   26   50    25
   4  |   13    8   10    8   10    6    8   13   15   17    4 |    23   19   16   20   22   15   18   23   12   25    17
   5  |   13   15    9   15   20    5   13   20   10   14    5 |    24   27   16   23   29   17   23   20   22   17    18
  X6  |    4  ---  ---  ---  ---  517  ---  ---  ---  ---    0 |   ---  ---  ---  ---  ---  ---  ---  ---  ---  ---     0
   7  |    8    9   14   13   12    5   11    9    9   32    4 |    24   26   19   26   27   19   21   22   20   32    21
   8  |    6   10   11   10    9    5   12   13   12   14    4 |    20   21   18   19   18   16   22   22   18   20    17
   9  |    6   10   11    8    7    6   11   14   10   18    3 |    21   22   20   19   19   18   22   24   18   22    19
  10  |    8   10   11    9    9    5    8   13   11   22    3 |    21   28   20   21   22   19   24   25   23   33    21
  11  |    7    8   14   15   12    4   10    9   10   29    4 |    26   32   22   22   35   21   27   24   21   36    24
  12E |   10   12    9   12   23    5   19   12   13   13    5 |    26   25   19   27   19   21   21   24   24   25    21
  13  |   11   11   10   15   19    6   12   19    9   14    5 |    22   27   15   23   33   16   22   15   18   17    17
  14  |    8   11    8   13   15    5   14   11   10   22    4 |    22   22   16   25   25   16   19   19   18   22    18
  15  |   13   18   10   16   18    5   16   24   13   16    6 |    26   34   18   28   29   21   24   23   23   20    21
  16E |   12   22    8   11   13    4   16   12   14   11    5 |    26   28   20   25   24   21   21   22   24   19    21
  17  |   11   12   12   16   18    6   14   15   13   23    5 |    26   33   24   31   32   24   27   27   28   24    25
  18  |    9   13    8   10   18    5   15   12   11   23    4 |    23   24   19   20   25   17   24   20   16   21    19
  19  |    7   12   12   16   16    7   15   11   12   28    4 |    21   28   21   26   26   19   27   21   20   20    21
  20  |    8   11   12   10   15    3   13   11   11   20    4 |    15   20   17   11   19   10   18   13   17   26    12
  21  |    7   10   12   10   15    3    9   10   16   31    4 |    15   23   17   17   19   14   21   17   18   21    16
  22  |    8   13    8   11   19    6   13   11   15   22    4 |    22   22   17   19   27   16   21   17   22   20    18
  23  |   10   15    9   14   12    4   15   12   13   23    4 |    17   23   12   18   20   12   18   15   19   14    14
  24  |   13    9   15   13   13    5   14   10   15   11    5 |    21   28   23   22   25   20   27   22   22   16    21
  25E |   13   19   15    8   15    6   10   16   12   13    5 |    21   33   26   19   22   18   21   21   18   21    20
  26  |   12   11   11   10   13    4   10   12   10   21    4 |    22   24   19   19   20   18   19   22   21   27    19
 X27  |   11   22   14   14  ---    6   12    9   14   12    5 |    19   30   20   18  ---   16   23   17   20   11    18
  28E |   10   12    8   11   15    6   12   14    8   16    4 |    26   23   20   23   22   20   23   29   24   26    22
  29  |   12   18   13   14   14    5   15   13   14   23    5 |    24   32   21   26   23   19   24   21   21   25    20
 X30  |    4  ---  ---  ---  ---   18  ---  ---  ---  ---    0 |    26  ---  ---  ---  ---   24  ---  ---  ---  ---    26
  31  |   14   22   13   13   18    6   13   14   14   24    5 |    25   38   22   27   34   21   28   24   22   25    24
  32  |    9   12   11   15   14    4   11   13    9   16    4 |    23   26   21   20   20   18   20   24   23   24    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   13   11   12   15    5   13   13   12   22      |T   22   26   19   22   24   18   22   21   20   23    19
 WRMS |   10   13   11   12   14    5   12   12   11   20      |NE  22   26   19   21   25   17   22   21   20   23    19
 MEDI |    9   11   11   12   14    5   12   12   11   20      |MD  23   26   19   22   24   18   22   22   21   21    20

Table 3.1791.2   GPS week: 1791   Day: 2   MJD: 56783.000                            

        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    8   12    9   13    4   15    8    6    9    3 |    30   35   25   30   40   27   36   28   25   23    29
   2  |    9    9   13    9    8    4    9   14    8   29    3 |    14   21   19   19   18   17   19   22   19   29    16
   3  |    7    9   10    9   14    5    8    7    9   42    3 |    18   22   16   18   21   15   17   15   17   42    16
   4  |    8    9   11   10    8    5    8   11    5   19    3 |    19   24   18   22   23   19   21   24   20   30    19
   5  |    8   17   10   13   19    4   12   22   11   19    5 |    19   28   18   23   29   16   20   20   20   23    17
   7  |    7   13   14   11   12    4   11    9   10   34    4 |    28   31   21   27   30   21   22   23   25   34    24
   8  |    3   11   11    7    8    5   10   10    7   12    3 |    20   24   18   18   20   17   21   20   20   19    19
   9  |    4   11   12    6    8    4   10   13    8   14    3 |    24   27   22   22   23   21   23   26   25   24    23
  10  |    6   10   11   10   10    6   13   12    9   23    3 |    24   29   23   24   23   20   26   25   23   33    23
  11  |    7    9   13    9   14    3   11    6    8   50    3 |    30   36   27   29   43   26   32   29   26   54    29
  12E |    8   16   10    9   16    4   19   13   10   11    4 |    26   29   21   26   26   21   21   24   25   21    23
  13  |   10   13   11   12   17    6   13   19    8   11    4 |    26   29   16   24   34   17   22   18   21   17    20
  14  |    8   15   10   13   15    8   15   11   14   17    4 |    24   24   19   23   26   16   19   17   18   19    19
  15  |    8   18    8   11   16    4   16   23   14   13    5 |    26   32   20   27   26   22   24   24   23   24    21
  16E |    7   17    8   14   18    5   17   12    9   12    4 |    22   23   19   26   24   20   20   22   25   20    20
  17  |    6   14   15   10   16    6   15   12   10   23    4 |    25   34   22   26   32   23   27   24   30   21    24
  18  |    8   14    9   11   18    6   19   11   11   21    4 |    20   26   19   19   26   17   27   17   17   21    18
  19  |    7   14   12   11   14    5   13    9   10   21    4 |    22   30   23   26   31   22   27   21   20   21    23
  20  |    6   12   10    9   13    5   13   11    8   19    3 |    16   24   16   16   18   13   18   13   19   25    15
  21  |    8   10   12   11   14    5   13   10   13   35    4 |    17   23   18   20   22   17   22   20   20   26    18
  22  |    8   13    9    9   17    6   14   12   11   19    4 |    20   24   18   19   28   15   19   14   21   20    18
  23  |    8   16    8   15   10    4   18   11    9   22    4 |    18   27   14   19   23   13   21   17   20   15    17
  24  |    9   10   14    9   12    4   11   11    8   11    4 |    23   27   23   23   24   20   26   21   24   18    22
  25E |    7   12   16    7   16    5   14   16    9   13    4 |    21   25   27   22   21   18   24   22   20   17    20
  26  |    7   11   11    8   13    6    8   10    9   20    3 |    23   25   22   23   21   21   20   22   22   27    21
 X27  |    8   10   13   12  ---    5   11    7   10   15    4 |    20   24   21   18  ---   18   24   19   23   18    19
  28E |    8   11    9    7   14    4   11   14    9   13    4 |    30   26   23   23   24   22   23   29   23   26    24
  29  |    8   18   14   13   14    4   17   15   10   24    5 |    27   34   29   27   29   25   30   25   28   26    26
 X30  |    2  ---  ---  ---  ---   24  ---  ---  ---  ---    0 |    28  ---  ---  ---  ---   23  ---  ---  ---  ---    27
  31  |    9   11   13   11   16    5   13   13   11   27    4 |    25   31   19   27   33   20   25   23   25   28    23
  32  |    5    9   10   11   13    6   11   13    9   20    3 |    24   27   22   21   21   18   22   24   26   24    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   13   11   10   14    5   13   13   10   23      |T   22   27   20   22   26   19   23   21   22   24    21
 WRMS |    7   13   11   10   13    5   13   11    9   21      |NE  22   27   20   22   26   19   23   21   22   25    21
 MEDI |    8   11   11   10   14    5   13   11    9   19      |MD  23   27   20   23   24   20   22   22   22   23    21

Table 3.1791.3   GPS week: 1791   Day: 3   MJD: 56784.000                            

        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    7   12   11   12    4   16    8   11    7    4 |    27   34   29   34   41   28   36   30   28   26    30
   2  |   10    9   12   11   12    3   10   12    9   23    4 |    16   21   16   15   20   11   16   18   16   20    14
   3  |    6    8   11    8   14    4   11    8   10   36    3 |    20   21   17   19   21   14   18   17   19   36    17
   4  |    7    7   10    9    9    4    8   12    8   18    3 |    23   22   19   21   27   19   22   24   23   28    21
   5  |    7   10   10   14   19    4   14   21    9   15    5 |    20   26   17   21   26   17   24   17   20   20    17
   7  |    7   11   14   12   13    4   11   10    9   36    4 |    27   28   21   31   28   21   24   23   25   36    23
   8  |    7    9   11    9   11    4   10   10   11   12    3 |    21   20   17   19   18   17   23   19   20   16    18
   9  |    6   10   12    6    9    5   10   11    6   11    3 |    26   24   21   22   21   20   24   24   21   18    21
  10  |    6    9   12   10   12    4    9   11    9   26    3 |    22   26   24   22   21   21   27   23   23   34    22
  11  |    8   10   13   12   16    3   10    7   12   35    4 |    27   36   27   34   45   27   32   31   24   41    29
  12E |    9   16    9   12   20    4   23   13   13   11    5 |    26   27   17   26   25   18   26   26   24   21    22
  13  |    8   12   11   12   18    4   13   19   12   12    5 |    22   27   15   22   32   17   23   18   25   14    19
  14  |   10   15    9   14   14    6   14   10   10   14    4 |    25   24   18   27   25   17   22   18   17   17    20
  15  |    8   19   10   15   17    4   20   22   15   13    6 |    25   29   17   29   27   20   24   25   30   23    21
  16E |    7   19    8   12   19    5   12   12    8   12    4 |    24   26   21   26   22   20   23   22   25   18    22
  17  |    6   14   13   10   16    4   17   14    9   31    4 |    24   33   23   29   35   24   29   28   30   29    26
  18  |    9   15   10   14   17    6   13   10   10   21    4 |    19   28   19   18   24   14   27   16   17   20    17
  19  |    8   14   12   15   15    5   13   10   10   26    4 |    20   27   21   29   30   21   24   21   22   23    21
  20  |   10   12   10   14   16    5   12   11   13   20    4 |    20   22   19   15   16   15   20   13   21   23    15
  21  |    9    9   12   11   14    5   10   10   14   36    4 |    15   22   20   22   26   16   20   21   22   27    18
  22  |    8   12   10   11   16    5   13   10    9   25    4 |    20   24   19   20   26   13   22   13   18   23    17
  23  |    9   14   10   14   12    4   16   11    8   21    4 |    15   23   13   15   22    9   19   14   17   17    14
  24  |    6   10   12    8   14    3   11    9    9   12    3 |    20   25   22   21   25   18   25   20   21   17    20
  25E |    6   10   14   10   17    5   13   14   11   14    4 |    21   24   26   19   29   17   24   22   19   20    20
  26  |    9   10   10   10   13    5   11   14   11   23    4 |    25   25   18   21   18   19   21   20   25   27    20
 X27  |   14   10   15    9  ---    5   12   10   12   12    5 |    22   19   20   20  ---   16   23   16   18   15    17
  28E |    8   11    7    8   17    4   11   14    9   16    4 |    26   23   21   23   21   20   25   26   27   24    22
  29  |    8   18   14   15   16    6   18   15   11   24    5 |    22   28   23   21   24   18   24   20   25   21    20
 X30  |    4  ---  ---  ---  ---   16  ---  ---  ---  ---    0 |    28  ---  ---  ---  ---   24  ---  ---  ---  ---    28
  31  |   10   12   13   13   19    5   11   11   14   23    4 |    29   33   24   32   36   26   30   27   29   27    27
  32  |    8   11   10   13   14    5    8   12    8   17    4 |    27   28   24   22   19   21   24   25   23   26    22
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   12   11   12   15    5   13   12   10   22      |T   22   25   20   23   25   18   24   21   22   23    20
 WRMS |    8   12   11   12   14    4   12   11    9   21      |NE  22   25   20   23   26   18   23   20   22   24    20
 MEDI |    8   11   11   11   15    4   12   11   10   18      |MD  22   25   20   22   25   18   24   21   22   23    20

Table 3.1791.4   GPS week: 1791   Day: 4   MJD: 56785.000                            

        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   13   10   12    5   14   10   13   10    4 |    29   33   27   35   37   28   36   28   27   27    29
   2  |    9    9   12   11   10    4   10   12   15   26    4 |    16   20   19   20   15   15   17   19   20   20    15
   3  |    6    8   12   10   16    4    9   11   10   37    3 |    21   22   18   19   18   17   20   16   22   39    18
   4  |    6    7   10    9   11    4   10   10   12   12    3 |    18   22   19   23   22   20   21   23   22   24    19
   5  |    8   13    9   13   16    4   14   19    9   12    4 |    23   27   20   25   27   21   24   21   24   23    20
   7  |    7    9   15   10   14    4   10   11    8   29    4 |    27   30   23   29   31   24   25   27   31   35    25
   8  |    5    8   13   10    9    4    8   11   10   13    3 |    19   21   19   19   19   18   21   21   27   19    19
   9  |    7    9   12   10    8    5    9   10   10   13    3 |    24   25   22   25   21   23   23   25   31   21    23
  10  |    6    8   12   10   10    6    8   11    8   26    3 |    22   27   23   23   20   23   24   24   25   34    22
  11  |    6    8   15    9   15    4   10    9   13   52    4 |    30   33   25   31   39   26   33   26   28   56    29
  12E |    7   14    9   10   29    5   20   13   16   10    5 |    29   31   24   31   25   25   30   29   32   24    27
  13  |    8   11   11    8   22    4   10   20   15    9    5 |    26   28   22   30   35   24   25   25   35   20    25
  14  |    7   14    9    9   18    7   14    9   15   17    4 |    25   23   19   25   28   22   23   20   27   20    21
  15  |    7   19   10   15   21    5   17   21   14   17    5 |    28   34   20   33   28   24   28   26   31   26    25
  16E |    7   11    9   13   20    5   14   14   15    8    4 |    29   27   26   30   26   26   27   26   30   23    26
  17  |    9   10   15   19   15    4   14   12   14   30    5 |    27   33   28   43   35   29   30   29   35   35    29
  18  |    9   12    9   10   19    4   14   12   16   18    4 |    24   25   21   21   23   19   25   21   19   20    20
  19  |    7   13   14   13   16    4   13   11    9   22    4 |    24   29   22   29   30   23   27   23   24   23    23
  20  |    8   12   11   10   17    4   15   12   12   19    4 |    23   24   23   18   18   18   24   17   22   28    19
  21  |    8    9   12    7   13    4   12   11   14   33    4 |    20   22   21   21   19   19   21   22   22   26    18
  22  |    8    9   11    8   15    5   11    9   12   23    4 |    21   22   17   21   24   18   19   18   22   24    18
 X23  |    3  ---  ---  ---  ---  101  ---  ---  ---  ---    0 |    38  ---  ---  ---  ---  226  ---  ---  ---  ---    38
  24  |    6    7   13    9   14    3   12   10   13   10    4 |    22   26   23   25   25   21   29   21   23   16    22
  25E |    7    9   14   11   16    4   12   15   18   15    4 |    24   28   28   25   22   23   31   28   29   22    24
  26  |    9    9    8   15   11    5   10   13    8   14    4 |    23   25   22   28   21   21   20   23   22   22    22
 X27  |    7    8   14   10  ---    3   12   11   10   13    4 |    20   21   21   21  ---   20   26   21   24   16    19
  28E |    7   10    8    8   19    4   11   12    8   12    4 |    26   22   22   24   22   22   24   27   29   22    23
  29  |    8   17   13   13   16    4   19   14   18   23    5 |    26   29   24   26   22   23   25   23   27   24    22
 X30  |    3  ---  ---  ---  ---   22  ---  ---  ---  ---    0 |    31  ---  ---  ---  ---   32  ---  ---  ---  ---    30
  31  |   11   15   13   11   19    5   13   16   13   25    5 |    24   32   23   28   34   23   30   27   29   26    25
  32  |    8    9   11   12   16    4    8   11   11   23    4 |    27   26   23   22   18   21   21   24   26   29    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   11   12   11   16    5   13   13   13   22      |T   24   26   22   25   25   28   25   23   26   25    23
 WRMS |    8   11   12   11   17    4   12   12   11   23      |NE  24   26   21   25   25   29   24   22   25   26    22
 MEDI |    7    9   12   10   16    4   12   11   13   17      |MD  24   26   22   25   23   23   25   23   27   24    23

Table 3.1791.5   GPS week: 1791   Day: 5   MJD: 56786.000                            

        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  |   14    8   15   14   14    6   15    6   15   11    5 |    23   29   20   29   33   20   33   22   18   19    23
   2  |   10    7   12   11    8    3    8   10   18   27    4 |    16   18   16   15   13   13   17   15   24   17    13
   3  |    7    9   12   13   16    5    9    9   20   33    4 |    19   21   17   19   20   14   18   15   23   35    16
   4  |    6    8   10    9    7    2    6    8   15   16    3 |    21   21   19   20   22   18   23   19   26   22    19
   5  |   10   15    9   16   18    4   13   19   13   12    5 |    19   24   13   20   27   13   22   14   21   16    14
   7  |    9   10   14   12   16    6   11   10   11   30    4 |    27   28   19   26   29   20   23   21   22   29    21
   8  |    6    8   10   10   10    4    9    7    9   13    3 |    20   21   18   19   19   17   23   18   22   19    18
   9  |    8    9   10    8    9    4    9    9   10   15    3 |    24   23   20   20   17   18   22   20   19   21    19
  10  |    8    7   12    9   11    5    7   11   13   22    3 |    23   25   21   19   22   17   24   23   22   30    20
  11  |   12   10   17    9   14    5   10    6   15   49    4 |    24   30   22   25   34   21   28   23   26   53    23
  12E |   11   13    9   13   25    6   22   12   14   10    5 |    24   27   18   26   18   17   27   23   23   17    20
  13  |   11   12    9    9   23    4   12   18   11   11    5 |    27   27   19   21   34   16   22   16   23   14    19
  14  |   16   12    9   14   19    6   12   11   13   17    5 |    26   21   15   25   26   17   22   20   24   16    18
  15  |   11   19   12   14   17    4   18   21   15   16    6 |    23   32   17   29   26   19   26   18   21   17    19
  16E |   12   15   10   10   20    3   12   14   11    8    5 |    23   25   20   24   20   20   21   23   25   16    21
  17  |    9   12   12   10   17    3   14   11   16   25    4 |    24   30   23   27   31   22   28   24   34   19    24
  18  |   16   13   12   12   16    5   15   12    8   25    5 |    24   25   20   20   25   16   28   17   19   23    18
  19  |   10   12   13   14   20    6   11    9   17   25    5 |    17   25   18   20   27   15   21   16   21   14    17
  20  |   11   13   11   10   18    6   12   10   11   17    4 |    19   21   17   17   18   13   20   11   14   18    12
  21  |   14    8   14    7   13    3   11   10   12   34    4 |    17   20   19   15   17   13   20   18   17   26    14
  22  |   11   11   12   10   17    5   10    9   13   24    4 |    17   23   16   22   26   15   24   17   20   22    16
 X23  |    4  ---  ---  ---  ---   15  ---  ---  ---  ---    0 |    15  ---  ---  ---  ---   27  ---  ---  ---  ---    12
  24  |    8    9   14    9   12    5   11   13   14    9    4 |    19   25   21   22   22   17   26   18   19   10    18
  25E |   10   11   14    9   16    4   12   13   14   16    4 |    23   25   26   19   20   17   26   20   20   20    19
  26  |   11    8   10   10   12    5    9    9   14   15    4 |    19   21   16   19   16   14   22   17   16   19    16
 X27  |    9    8   15   11  ---    5   11    9   10   14    4 |    17   19   21   19  ---   15   24   16   18   13    16
  28E |    9   13    6    9   12    5   10   11   13   10    4 |    26   23   21   25   21   20   24   25   28   17    22
  29  |   13   16   13   13   16    5   16   12   12   25    5 |    26   26   21   23   21   19   25   19   22   18    19
 X30  |    4  ---  ---  ---  ---   17  ---  ---  ---  ---    0 |    26  ---  ---  ---  ---   21  ---  ---  ---  ---    25
  31  |   12   14   14   12   17    5   10   11   13   23    4 |    21   30   18   23   31   17   25   22   20   23    20
  32  |   10   10   10   14   15    5    7   11    8   18    4 |    28   28   24   22   20   20   24   21   21   24    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   11   12   11   16    5   12   12   13   22      |T   21   24   19   21   23   17   23   19   21   20    18
 WRMS |   11   11   12   11   14    5   12   10   12   20      |NE  21   24   18   21   24   17   23   18   21   21    18
 MEDI |   10   11   12   10   16    5   11   11   13   17      |MD  23   25   19   21   22   17   24   19   21   19    19

Table 3.1791.6   GPS week: 1791   Day: 6   MJD: 56787.000                            

        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    7   15   12   14    6   15    9   14   14    4 |    40   43   34   45   50   36   45   37   31   36    38
   2  |    9    8   11   11    9    5    9   10    9   24    3 |    21   27   22   24   24   20   25   26   22   23    21
   3  |    7    9   10    9   14    5    8    9   12   39    3 |    22   26   21   24   22   17   25   17   22   41    20
   4  |    6    7    7    7    9    4    5    9   11   13    3 |    28   31   29   31   36   29   31   32   28   31    29
   5  |    9   15   10   14   18    5   16   18   13   16    5 |    26   34   23   27   33   22   32   17   22   27    23
   7  |    8   10   13   13   13    6   11    8   11   34    4 |    33   35   27   36   35   27   31   29   28   41    29
   8  |    5    8   10   11   10    5    9    6    8   11    3 |    25   29   23   26   28   22   30   23   24   22    24
   9  |    7   10   11   10   10    5    9    6    8   16    3 |    30   33   28   31   32   27   33   28   28   28    29
  10  |    6    7   10   10   10    3    8   12    9   18    3 |    29   36   30   27   29   26   35   30   26   34    29
  11  |    8    8   15    8   14    5   10    7   11   46    4 |    35   39   29   38   48   32   37   35   30   56    34
  12E |    9   19    8   15   23    5   20   13    9    9    5 |    30   37   24   33   27   25   29   31   23   23    27
  13  |    7   12    8   12   19    6   12   18    8    9    4 |    31   33   21   31   39   24   28   24   27   21    26
  14  |   10   17   10   10   15    8   11   10    9   16    4 |    30   29   21   32   33   24   27   25   23   21    25
  15  |   10   22   11   14   17    7   18   21   19   11    6 |    36   38   25   38   32   30   33   29   36   30    30
  16E |    7   16   10   12   14    6   14   13    8    8    4 |    31   35   32   35   32   29   33   30   29   28    30
  17  |    8   13   14   11   16    6   14   11    8   35    4 |    32   39   30   40   44   34   36   36   38   40    34
  18  |   10   12   12   12   17    7   14   13   13   21    4 |    30   33   28   25   31   22   35   18   22   26    25
  19  |   10   12   12   14   16    8   14   10   11   20    4 |    28   34   26   35   36   27   30   27   26   26    28
  20  |    9   14   11   11   18    6   17   14   15   17    5 |    25   30   25   24   25   19   30   22   25   26    22
  21  |   10    8   14   10   12    4   11   12   10   38    4 |    21   28   25   27   28   20   27   28   20   33    22
  22  |    8   10   12    8   17    6   10    9   14   21    4 |    25   28   24   24   30   19   28   19   20   22    22
  23  |    7   15    7   13   11    8   15   12   10   15    4 |    15   18    9    9    8   19   16    8    7    7    16
  24  |   12   11   13    7   15    6   14    9    8   12    4 |    33   31   28   31   28   26   32   24   22   21    27
  25E |    7   10   14   10   15    7   14   11   12   14    4 |    30   32   33   30   32   28   36   31   24   27    29
  26  |   10   13   12   10   11    7   10    9   10   19    4 |    30   30   25   30   26   22   29   23   21   25    26
 X27  |   13   10   17   10  ---    7   12    9   10   14    4 |    26   26   26   26  ---   21   31   23   23   20    24
  28E |    7   11    8   10   18    6   12   11    9    6    4 |    28   26   24   27   28   23   27   26   27   20    25
  29  |    9   17   15   13   14   11   17   12   13   23    5 |    25   33   24   27   30   24   30   25   22   26    24
 X30  |    2  ---  ---  ---  ---   20  ---  ---  ---  ---    0 |    35  ---  ---  ---  ---   26  ---  ---  ---  ---    34
  31  |    8   10   16   10   17    6   12    9   11   23    4 |    26   34   22   31   38   24   32   27   26   28    27
  32  |    6    9   10   13   15    7    9   10   11   17    4 |    32   33   32   29   28   26   32   30   33   32    30
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   12   12   11   15    6   13   12   11   22      |T   28   32   25   29   31   24   30   26   25   28    26
 WRMS |    8   12   12   11   14    6   12   10   10   20      |NE  28   31   25   29   31   24   30   25   25   28    26
 MEDI |    8   10   11   11   15    6   12   10   10   16      |MD  30   33   25   30   31   24   31   26   24   26    27



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 4.1791   GPS week: 1791   MJD: 56781.0-56787.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
igs | igs 2852 |     7     6    18 |     9    11    27 |     7     9    17 |



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

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

Table 5.1791.0   GPS week: 1791   Day: 0   MJD: 56781.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
igs | igs 2880 |     4     5    11 |     5     6    14 |     8     8    19 |

Table 5.1791.1   GPS week: 1791   Day: 1   MJD: 56782.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
igs | igs 2880 |     6     6    16 |     5     6    23 |     9    14    19 |

Table 5.1791.2   GPS week: 1791   Day: 2   MJD: 56783.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
igs | igs 2880 |     8     8    20 |     7     7    22 |     7     9    15 |

Table 5.1791.3   GPS week: 1791   Day: 3   MJD: 56784.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
igs | igs 2880 |     5     5    16 |     6     9    17 |     8     9    17 |

Table 5.1791.4   GPS week: 1791   Day: 4   MJD: 56785.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
igs | igs 2784 |     9     7    26 |     6     5    17 |     7     9    16 |

Table 5.1791.5   GPS week: 1791   Day: 5   MJD: 56786.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
igs | igs 2784 |     7     7    15 |     7    11    25 |     7    10    14 |

Table 5.1791.6   GPS week: 1791   Day: 6   MJD: 56787.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
igs | igs 2880 |     9     7    22 |    27    31    73 |     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 6.1791   GPS week: 1791   MJD: 56781.500-56787.500

                                                         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 |     -69     -30      32    -187      3 |      16     21
            |      19      16      70      89      5 |       1
emr   uuuxu |      60      -4     -49     379      3 |      50     54
            |      18       5     101      50      9 |       4
esa   uuuuu |     -10      -4      64     -11      1 |      19     22
            |      12      10      45      74      3 |       1
gfz   uuuuu |     -10       6     -43     -97      3 |      22     24
            |      21      17      72      97      4 |       1
grg   uuxuu |      32      46    -329     108     -3 |      30     32
            |      11      13      82      77      4 |       3
igr   xxxxx |     -12      24      -7      85      0 |       7     14
            |      12      19      77      64      5 |       1
irf   xxxxx |      18       2     -46      40     -1 |       2     13
            |      16       7      31      17      1 |       1
jpl   uuuuu |      33      -5     -18     251      8 |      33     38
            |      20      10      73      56     10 |       5
mit   uuuuu |      13       1     -60       1     -4 |      23     26
            |      43      17      59      38      3 |       2
ngs   uuuuu |       1      22      68      84     -4 |       9     16
            |      54      43     137     102      5 |       2
sio   xxxxx |      39      34      50     175     -1 |      46     49
            |      27      17      83      45      8 |       1


Table 7.1791.0   GPS week: 1791   Day: 0   MJD: 56781.500

                                                         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 |     -58     -18      40     -66      2 |      15     19
emr   uuuxu |      48      -5     -32     331     14 |      44     49
esa   uuuuu |     -25      -2      10      42      0 |      20     22
gfz   uuuuu |     -17      18     -75       9      8 |      20     22
grg   uuxuu |      27      51    -362      34     -8 |      33     34
igr   xxxxx |       7      55     -77      58      3 |       6     12
irf   xxxxx |      -5       8     -91      35     -1 |       1     12
jpl   uuuuu |      21      11     -19     180     24 |      25     32
mit   uuuuu |     -46     -21    -100     -27     -2 |      22     25
ngs   uuuuu |      71      -9     120    -102    -11 |      10     16
sio   xxxxx |      18      32      51     138      2 |      44     46

Table 7.1791.1   GPS week: 1791   Day: 1   MJD: 56782.500

                                                         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 |     -79     -43      -3    -339     14 |      16     20
emr   uuuxu |      44      -1       1     439      4 |      48     52
esa   uuuuu |     -19     -14      26     103     -3 |      20     23
gfz   uuuuu |      20      26    -146      43      3 |      22     24
grg   uuxuu |      40      38    -368       7     -2 |      33     34
igr   xxxxx |      -9       9     -56     175     10 |       8     13
irf   xxxxx |      14      -4     -64      72      0 |       3     12
jpl   uuuuu |      43      -5    -103     197      7 |      30     37
mit   uuuuu |     -12      -4     -39      14      0 |      24     26
ngs   uuuuu |      -2      22     237      87    -10 |      11     16
sio   xxxxx |       5      15     183     191     13 |      46     48

Table 7.1791.2   GPS week: 1791   Day: 2   MJD: 56783.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -38     -30      71    -184     -1 |      18     22
emr   uuuxu |      92       0      86     406     11 |      48     53
esa   uuuuu |     -17       2      54      37      2 |      20     22
gfz   uuuuu |      -6      16       7     -71      3 |      22     25
grg   uuxuu |      26      54    -460     205     -6 |      32     33
igr   xxxxx |     -16      10     108      56     -3 |       8     14
irf   xxxxx |      24       9     -35      28     -1 |       3     12
jpl   uuuuu |       2      -3     -53     229     -8 |      32     38
mit   uuuuu |      39       2     -38     -49     -3 |      24     27
ngs   uuuuu |     -38      -5    -152      49      1 |      11     16
sio   xxxxx |      60      31      47     137     -3 |      48     50

Table 7.1791.3   GPS week: 1791   Day: 3   MJD: 56784.500

                                                         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 |     -88     -21      -7    -159      1 |      17     22
emr   uuuxu |      78      -1     -62     310     -5 |      51     55
esa   uuuuu |     -12     -18     132     -49      2 |      19     22
gfz   uuuuu |      -3     -16      84    -107      6 |      23     25
grg   uuxuu |      33      45    -360     132      1 |      31     32
igr   xxxxx |     -33      19      31      35     -4 |       8     14
irf   xxxxx |      20       9     -72      36     -1 |       4     12
jpl   uuuuu |      66       4      31     281     12 |      33     38
mit   uuuuu |      33      27    -170     -17     -4 |      24     27
ngs   uuuuu |     -25       7     -15      85     -5 |      10     16
sio   xxxxx |      43      57     -99     131      0 |      47     49

Table 7.1791.4   GPS week: 1791   Day: 4   MJD: 56785.500

                                                         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 |     -54     -14     -88    -110      2 |      14     22
emr   uuuxu |      44     -13      23     437      3 |      50     54
esa   uuuuu |      -1      11      68     -42      0 |      17     21
gfz   uuuuu |     -15       3     -59    -173     -3 |      22     25
grg   uuxuu |      12      69    -238      61      1 |      27     30
igr   xxxxx |     -10      41      16      93     -4 |       6     16
irf   xxxxx |       7       3     -37      21     -3 |       1     14
jpl   uuuuu |      36     -15     102     345     10 |      34     38
mit   uuuuu |     -28       4     -41     -10    -10 |      22     26
ngs   uuuuu |      56      -7      91      95      2 |       6     17
sio   xxxxx |      23      57      40     178     -2 |      46     48

Table 7.1791.5   GPS week: 1791   Day: 5   MJD: 56786.500

                                                         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 |     -87     -59     110    -216      0 |      16     23
emr   uuuxu |      57       1    -198     362      0 |      55     57
esa   uuuuu |      -8      -1      45    -111      3 |      18     22
gfz   uuuuu |     -49     -17     -60    -165     -1 |      23     26
grg   uuxuu |      38      38    -275     191      0 |      29     31
igr   xxxxx |     -11      33    -110       9     -4 |       8     16
irf   xxxxx |      15      -8     -12      35      0 |       2     14
jpl   uuuuu |      26     -12     -95     253      2 |      38     41
mit   uuuuu |      30     -16      17      34     -3 |      22     26
ngs   uuuuu |      25     114     205     144     -1 |       8     18
sio   xxxxx |      37      20      83     194     -2 |      47     50

Table 7.1791.6   GPS week: 1791   Day: 6   MJD: 56787.500

                                                         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 |     -82     -26     101    -236      5 |      16     23
emr   uuuxu |      55      -8    -162     370    -10 |      53     55
esa   uuuuu |      11      -9     114     -58      5 |      17     22
gfz   uuuuu |       1      11     -51    -217      4 |      22     25
grg   uuxuu |      48      29    -239     124     -4 |      26     30
igr   xxxxx |     -11       4      42     167     -2 |       5     16
irf   xxxxx |      49       0     -10      51      0 |       1     15
jpl   uuuuu |      40     -16      11     276      6 |      39     42
mit   uuuuu |      76      13     -47      62     -5 |      20     25
ngs   uuuuu |     -79      29     -12     234     -3 |       5     15
sio   xxxxx |      85      24      47     258    -13 |      46     49



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