[IGSREPORT-29176] Wk 2246 IGS Final Orbits

acc acc at igs.org
Fri Feb 10 22:21:36 UTC 2023


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2246   (Jan 22, 2023 - Jan 28, 2023)

Contacts: acc at igs.org


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:

IGS0OPSFIN_${yyyy}${doy}0000_01D_15M_ORB.SP3  IGS GPS ephemeris files in SP3
                                              format.
IGS0OPSFIN_${yyyy}${doy}0000_01D_05M_CLK.CLK  IGS GPS satellite and station
                                              clocks in clock RINEX format.
IGS0OPSFIN_${yyyy}${doy}0000_01D_01D_CLS.CLS  IGS GPS clock combination summary
                                              report.
IGS0OPSFIN_${yyyy}${doy}0000_07D_01D_ERP.ERP  Earth Rotation Parameters (ERP)
                                              and their rates as well as
                                              Universal Time (UT1-UTC) and
                                              Length Of Day (LOD) associated 
                                              with IGS ephemerides.
IGS0OPSFIN_20230220000_07D_01D_SUM.SUM        Complete report.

    
REMARKS concerning the IGS Orbit Combination:                                  
---------------------------------------------

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, GRG, 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.
    

 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   | POHN TASH
                0  |  ESA   | TASH DGAR KARR TASH
                0  |  GFZ   | 20 AREQ DGAR AREQ DGAR
                0  |  GRG   | 8 CZTG SCUB CZTG SCUB WIND
                1  |  COD   | GRAC NNOR SCUB
                1  |  ESA   | GAMB KARR
                1  |  GFZ   | 27 BRUX GAMB
                1  |  GRG   | 27 27 GAMB SVTL
                2  |  COD   | MAYG
                2  |  ESA   | AREQ ZAMB
                2  |  GFZ   | 13 AREQ AREQ PTVL
                2  |  GRG   | CZTG CZTG SVTL
                3  |  COD   | 1 MAYG TASH
                3  |  ESA   | MAYG
                3  |  GFZ   | TASH TASH
                3  |  GRG   | 32 SVTL SYOG ULAB
                4  |  COD   | AREQ DAV1 FAA1 HYDE THTG TONG
                4  |  GFZ   | 32 AREQ AREQ
                4  |  GRG   | LMMF SVTL
                5  |  COD   | 17 SYOG
                5  |  ESA   | SYOG GAMB KARR SYOG
                5  |  GRG   | 32 CZTG TONG CZTG SVTL TONG
                6  |  COD   | 29 32 DAV1 NNOR ULAB
                6  |  ESA   | 1 1 NRMD ZAMB
                6  |  GRG   | 17 CZTG CZTG SVTL SYOG
                6  |  MIT   | 1

 5. Starting on 22-Oct-2000 (GPS Week 1085-0; MJD=51839) all IGS clock products
    are based on the new clock combination scheme which uses the clock RINEX
    files as input if available, otherwise SP3 clocks are used. The AC clocks are
    corrected for the radial offsets of their satellite orbits compared to the
    combination.

 6. The following orbit solutions were excluded from the combination because they
    were biasing the weighted average (generally indicated by long arc RMS). They
    were still used for statistics computation.
    
               Day | Centre | PRN list
               ----+--------+---------------
                2  |  COD   |  32
                3  |  COD   |  32
                3  |  ESA   |  32
                3  |  GFZ   |  32
                3  |  GRG   |  32
                5  |  COD   |  32
                5  |  GRG   |  32
                6  |  COD   |  32
                6  |  ESA   |   1

 7. Velocity changes were estimated to alleviate the effects of modeling problems,
    experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G17 |  4 |    |    |    |    |    |    |
           PRN G29 |    |    |    |    |    |    |  4 |
           PRN G32 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |

 8. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) all IGS products, including the IGS combined
    orbits, are based on the IGS realization of the ITRF2005 reference frame
    (IGS05). For more information see IGSMAIL #5447. The IGS05 frame is also the
    basis for the homogeneously reprocessed IGS products from GPS Weeks 730 to 1459
    (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products, are
    based on the IGS realization of the ITRF2008 reference frame (IGS08). For more
    information see IGSMAIL #6354.
    
    Starting 07-Oct-2012 (GPS Week 1709, day 0, MJD 56207) all IGS products, are
    based on the updated IGS08 frame (IGb08). For more information see IGSMAIL
    #6663.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) all IGS products,
    are based on the IGS realization of the ITRF2014 reference frame (IGS14).
    For more information see IGSMAIL #7399.
    
    Starting 17-May-2020 (GPS Week 2106, day 0, MJD 58986) all IGS products,
    are based on the updated reference frame (IGb14).
    For more information see IGSMAIL #7921.
    
    Starting 28-Nov-2022, all IGS products, are based on the IGS realization of
    the ITRF2020 reference frame (IGS20). Starting from the same date, the IGS
    products are based on the repro3 standards, including long filename formats.
    For more information see IGSMAIL #8238, #8256, #8274 and #8282.
    

 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 |   -1.1     .3    -.8     -17     11      1     .12
       ESA  |   0 |     .7     .3    -.9       9     -5      9    -.34
       GFZ  |   0 |     .3    -.0     .6     -14     14      4     .46
       GRG  |   0 |     .8     .7     .3       4      4      4     .26
       JPL  |   0 |    6.7    8.0    9.4     -13     30    -36     .67
       MIT  |   0 |    6.1    2.8   14.6     -19      8      3     .19
       NGS  |   0 |    3.1    6.4    6.5      20     24    -40     .43
       SIO  |   0 |    8.6    1.1    5.4       3   -116     25     .24

       COD  |   1 |   -1.2     .4   -1.1     -18      3     -5     .24
       ESA  |   1 |     .6    -.0    -.9      15    -12      3    -.38
       GFZ  |   1 |    -.1     .1     .3     -27     -9      4     .41
       GRG  |   1 |    1.2     .4    -.6       3     11     -1     .19
       JPL  |   1 |   14.0    2.2    8.6     -25     32    -28     .60
       MIT  |   1 |    8.2    6.8   13.5     -15    -15      1     .10
       NGS  |   1 |    6.2    6.3   12.4     -29      9    -14     .20
       SIO  |   1 |   11.7    3.2    6.3      22   -144     20     .07

       COD  |   2 |   -1.3     .6   -1.0     -19      3      1     .13
       ESA  |   2 |     .4    -.6   -1.1       7    -12    -16    -.34
       GFZ  |   2 |     .2    -.2     .1     -28     -9     12     .39
       GRG  |   2 |     .9    -.4     .0     -12      3     18     .22
       JPL  |   2 |   11.7    2.4    6.3     -19     42    -48     .99
       MIT  |   2 |    5.3    2.4   10.2      -9     -9      6     .17
       NGS  |   2 |    4.4    5.6    8.1       0     32    -34     .19
       SIO  |   2 |    8.6     .2   11.4      -9    -69     56    -.01

       COD  |   3 |    -.9     .6    -.5     -12     -2     -2     .18
       ESA  |   3 |    1.0     .0   -1.2      14    -13      5    -.35
       GFZ  |   3 |     .7    -.1    -.2     -40     -9     13     .18
       GRG  |   3 |    1.5     .5    -.3      14     18      1     .04
       JPL  |   3 |    8.4    6.9    4.7     -29     40    -48     .80
       MIT  |   3 |    4.5    1.0   10.0     -18     -6      5     .21
       NGS  |   3 |    7.3    6.6    9.5       4     -2    -29     .21
       SIO  |   3 |    8.7   -1.4   11.7     -50    -96     34     .18

       COD  |   4 |    -.5     .9    -.3       0     -5    -11     .18
       ESA  |   4 |     .2     .4    -.7      -2    -14      4    -.09
       GFZ  |   4 |     .0     .3     .0     -22    -11     19     .37
       GRG  |   4 |    1.3     .7    -.1      11     12     13     .29
       JPL  |   4 |   10.6    7.4    8.5     -12     36    -14     .98
       MIT  |   4 |    6.3    2.8   12.3     -21      0     -2     .23
       NGS  |   4 |    6.7     .5     .1     -13    -29    -12     .14
       SIO  |   4 |    6.0     .7    4.1     -31   -110     41     .07

       COD  |   5 |    -.2     .7    -.5       4    -10     -7     .19
       ESA  |   5 |     .7     .2   -1.1       3    -14      3    -.23
       GFZ  |   5 |     .1     .3    -.4     -26    -12     10     .36
       GRG  |   5 |     .8     .5    -.9      20      4      7     .15
       JPL  |   5 |    6.6    2.9     .3     -24     40    -23     .79
       MIT  |   5 |    7.4    -.7    9.2     -19     -3     -8     .23
       NGS  |   5 |    5.5    7.4   -5.5      49    -37    -37     .36
       SIO  |   5 |    8.5   -4.1    9.7     -60    -80     50     .01

       COD  |   6 |    -.3     .6    -.5       7    -10    -10     .19
       ESA  |   6 |     .6     .2    -.9     -12    -13     -4    -.18
       GFZ  |   6 |     .0     .1    -.1     -21    -28      5     .39
       GRG  |   6 |     .1    -.9    -.6     -21     15     11     .17
       JPL  |   6 |    2.4    3.9    2.8     -10     47    -18     .68
       MIT  |   6 |    4.9   -6.7   11.9     -16    -11      3     .27
       NGS  |   6 |    2.9    2.0    3.0      12     12    -27     .23
       SIO  |   6 |    6.1   -6.5   10.6     -71    -35     64     .05


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:
        https://files.igs.org/pub/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:
        https://files.igs.org/pub/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.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) the absolute antenna
    model file has been updated to igs14.atx to be consistent with IGS14.
    See IGSMAIL #7399 for more information
        https://files.igs.org/pub/station/general/igs14.atx
    
    Starting 28-Nov-2022, the absolute antenna model file has been updated to
    igs20.atx to be consistent with IGS20.
    See IGSMAIL #8238 and #8256 for more information
        https://files.igs.org/pub/station/general/igs20.atx
    
    The JPL solution did not use IGS20/igs20.atx until GPS Week TBA, which caused
    their orbit and clock residuals to be higher during that period than for the other
    centres; from GPS Week 2238 through TBA, the JPL solution is excluded from the
    weekly SINEX combination, as well as from orbit and clock combinations.
    


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 1.2246.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2246.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 2.2246.[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 3.2246.[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 5.2246.0-6). 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 2246 summary.                       (Jan 22, 2023 - Jan 28, 2023)

Table 1.2246.a   GPS week: 2246   MJD: 59966.000-59972.000

         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  834|   -1     0     3    14   -31     1   .03    8    8 |    -700     286      6     89
        |    0     0     1     7    10    32   .02           |     100     330
esa  150|    0     0     5    20   -21   -32  -.04    9    9 |    -334    -357      5     72
        |    0     0     1    23    19    18   .03           |     181     315
gfz  132|   -1     0     3    28   -16   -30   .08   11   10 |     110      73      9     77
        |    0     0     0    15    21    18   .02           |     210     528
grg  n/a|    1    -2    -5    -1   -13   -17  -.05   10    9 |     -98     135      7    118
        |    0     0     1    24    20    21   .06           |     161     379
igr  n/a|    0     0    -1    10    -9   -23   .04    5    5 |    -392     -77     11     83
        |    0     0     1    20    25    18   .02           |     435     395
jpl   80|    0     0     0    -5   -31   -26   .20   24   25 |    -173    -456     73    164
        |    2     1     2    27    20    16   .03           |    1145     501
mit  360|    0     0     0    -9   -13    43   .02    7    6 |   -5338    -207    402  12391
        |    0     0     0    23    30    49   .01           |    7181     679
ngs  286|    0     0    -1    12   -37   -21  -.05   11    9 |    -662     -66    740   1661
        |    0     0     3    29    22    24   .03           |     407    1355
sio  353|    0     0    -5   -45   132    21   .00    9    8 |     ---     ---    ---    ---
        |    0     0     1    41    44    22   .02           |     ---     ---


Table 1.2246.b   GPS week : 2246   MJD: 59966.000-59972.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.2246.0   GPS week: 2246   Day: 0   MJD: 59966.000                            

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  832|   -1     0     4    26   -48    -7   .02    8    8 |    -521     244      6     86
esa  150|    0     0     5    24   -21   -12  -.03    9    9 |    -329    -403      5     69
gfz  130|   -1     0     4    25   -27   -16   .10   12    9 |    -147     339      9     73
grg  n/a|    0    -1    -3    -1   -11   -33  -.11   10   10 |    -250     387      8    119
igr  n/a|   -1     0    -1    11   -27    -1   .05    5    5 |    -122    -363     12     87
jpl   80|   -1     0     3   -16   -46   -22   .21   24   24 |    1217    -781     73    157
mit  360|    1     1    -1    -1   -35    18   .02    7    6 |   -5431    -164     80  13978
ngs  293|    0     1     0    38   -65   -13  -.05   12   10 |    -551     217    865   1831
sio  353|    0     0    -6   -78   167    46  -.00    8    7 |     ---     ---    ---    ---

Table 2.2246.1   GPS week: 2246   Day: 1   MJD: 59967.000                            

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  836|   -1     0     3     7   -37    18   .02    7    6 |    -751     159      6     95
esa  150|    1     0     5    35   -29   -45  -.00    9    9 |     -21   -1037      5     66
gfz  136|   -1     0     3    30   -26   -39   .07   10    8 |     393    -389      9     72
grg  n/a|    1    -1    -5    14    -4   -10  -.05    9    8 |    -126     -15      7    110
igr  n/a|   -1     0    -1     9   -16   -17   .06    5    4 |    -592     560     12     91
jpl   80|    2    -3     1     0   -48   -38   .23   24   24 |     209     292     74    171
mit  360|    0     0    -1   -21    -7    46   .01    6    5 |  -15318     368     70  20188
ngs  292|    0     0     1    23   -30   -30  -.04   11   10 |    -639     -21    648   1427
sio  352|    0     0    -6   -71   129    13  -.04    8    7 |     ---     ---    ---    ---

Table 2.2246.2   GPS week: 2246   Day: 2   MJD: 59968.000                            

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  839|    0     1     4    16   -31   -53   .02    8    7 |    -653      50      7     98
esa  150|    0     0     5    30   -26   -45  -.02    9    8 |    -240    -142      4     60
gfz  134|    0     0     4    25   -26   -46   .09    9    8 |       5     425      8     76
grg  n/a|    2    -3    -5     9   -20   -38  -.11    9    9 |     -12     233      7    126
igr  n/a|    0     0    -3    28   -31   -44   .07    5    5 |     226     -25     11     80
jpl   80|    2    -2     0    -8   -33   -42   .15   24   24 |     807    -101     76    148
mit  360|    0     0    -1    -8   -21    90   .01    5    5 |     459   -1547   2378   8913
ngs  291|    0     0     2    16   -43   -18  -.03   11   10 |    -742     226    646   1385
sio  354|    0     0    -6   -47   145    27   .01    7    7 |     ---     ---    ---    ---

Table 2.2246.3   GPS week: 2246   Day: 3   MJD: 59969.000                            

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  840|   -1     0     2     4   -32    40   .02    7    7 |    -716      48      6     91
esa  150|    0     0     2    -6   -29   -24  -.05    8    9 |    -551    -193      6     85
gfz  133|   -1     0     3     4   -18   -34   .08   12   11 |     194    -307     10     82
grg  n/a|    1    -3    -3   -47   -12     9  -.10   12   11 |    -105    -122     10    136
igr  n/a|    0     0     0   -15   -15   -24   .04    5    5 |     -13    -710     12     72
jpl   80|    0     0     0   -51   -29   -12   .18   24   24 |     487   -1295     73    166
mit  360|    0     1     0    26     5   -13   .05    8    7 |    1337    -560     71  10205
ngs  287|    1     0     1     5   -52   -40  -.05   11    9 |       9   -2893    781   1621
sio  354|    0     0    -5   -10   116    39   .01    8    8 |     ---     ---    ---    ---

Table 2.2246.4   GPS week: 2246   Day: 4   MJD: 59970.000                            

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  832|   -2     0     4    19   -23   -26   .02    9    9 |    -834     799      6     87
esa  150|    0     0     8    25    13   -36  -.07    9    9 |    -535    -205      5     68
gfz  134|   -1     0     3    39    21   -24   .08   11   11 |      -4     512     11     87
grg  n/a|    1    -2    -5    -5    15   -45  -.03    9    8 |    -293     685      7    109
igr  n/a|    0     0    -3    28    37   -40   .03    5    5 |    -473     -12     13     89
jpl   80|    0    -2     3    10    -7   -37   .18   24   24 |    -771    -388     72    180
mit  360|    1     0     0   -16   -45    77   .02    6    5 |    1485     441     69  13147
ngs  280|    0     0    -4    17   -17   -11  -.02   10    8 |   -1370    1580    938   1851
sio  354|    0     0    -5   -48    71     0   .01    8    7 |     ---     ---    ---    ---

Table 2.2246.5   GPS week: 2246   Day: 5   MJD: 59971.000                            

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  828|   -1     0     3     9   -31    11   .07    9    8 |    -661      -4      6     83
esa  150|    1     1     7    47   -47    -5  -.09    9    9 |    -380    -169      6     75
gfz  131|    0     0     2    53   -41     0   .05   11   11 |     -39     642     10     78
grg  n/a|    1    -2    -6    29   -51     0   .02   10   10 |     -96     261      8    111
igr  n/a|    0     0     0    28   -22    -1   .02    5    5 |    -904     125     11     81
jpl   80|   -1     0     0    38   -54     2   .26   25   25 |   -1400    -404     72    161
mit  360|    0     0     0   -48    44   -20   .02    7    6 |   -5336     -65     65   7404
ngs  281|    0     1    -6    33   -49    20  -.11   10    9 |    -782     251    643   1771
sio  351|    0     0    -2   -88   201    40   .01   12   11 |     ---     ---    ---    ---

Table 2.2246.6   GPS week: 2246   Day: 6   MJD: 59972.000                            

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  837|   -2     1     0    19   -15    23   .04   10    9 |    -766     708      5     87
esa  150|    0     0     6   -16    -5   -54  -.04    9    9 |    -286    -353      6     87
gfz  132|   -1     0     2    18     4   -54   .11   10   10 |     370    -707     10     75
grg  n/a|    0    -2    -5   -10    -8    -1   .00   10    8 |     196    -483      7    121
igr  n/a|    0     0    -2   -17    12   -38   .03    5    5 |    -872    -117     11     86
jpl   80|   -3     1    -2    -8     0   -37   .20   25   25 |   -1764    -519     76    170
mit  360|    0     0     0     5   -31   101   .01    7    6 |  -14564      76     84  12902
ngs  283|    0     1    -2   -49     0   -56  -.07   10    8 |    -560     178    659   1747
sio  355|    2     0    -3    27    93   -13  -.00   10   10 |     ---     ---    ---    ---

       
       
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 3.2246.0   GPS week: 2246   Day: 0   MJD: 59966.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1  |    7   10   12    8    4   10    7   12    7    3 |    33   55   34   35   34   36   35   31   31    33
   2  |    8    7    8   10    4    9    7   12    8    3 |    34   38   39   34   36   34   36   36   42    35
   3  |    8   11   12   11    5   11    4   10    8    3 |    41   44   41   40   41   45   40   39   46    40
   4  |    8   16   13   12    4   50    6   16    7    4 |    48   53   45   49   49   64   52   46   58    49
   5  |    7    8    9   11    4   10    6   12    9    3 |    44   41   46   43   44   44   43   44   52    43
   6  |    7    8    7    6    4    9    6   10    8    3 |    41   41   38   40   42   42   39   38   43    39
   7  |    7    7    5    8    4   10    6    8    6    2 |    80   75   80   74   78   79   79   76   80    77
   8E |   15   17   28   23   11  ---   14   29   12    8 |    36   39   50   45   36  ---   34   34   36    34
   9  |    8    8   13    8    3   10    7   12   10    3 |    47   47   49   46   47   48   49   45   51    46
  10  |    5    8   11    7    3   11    4    9    9    3 |    36   36   40   32   37   37   35   34   42    35
  11  |    6    8    8    7    4   55    6   13    5    3 |    55   56   58   56   55   54   55   53   57    55
  12  |    9    7    8   12    4    9    5    9    7    3 |    53   55   56   52   53   56   51   55   58    53
  13  |    7    5    9    8    4   10    4   11    5    2 |    39   41   42   41   38   42   39   35   47    39
  14  |   10    8   10   11    6   48   11   10    8    4 |    74   77   77   77   77   85   75   78   81    76
  15  |    7    7   10   12    5   11    4    9    5    3 |    41   39   43   43   40   40   40   38   47    40
  16  |    8    6    9    9    5   10    6   16    9    3 |    54   58   58   58   57   58   55   60   63    57
  17E |    8   10   12   10    7   10    9   11    7    4 |   157  154  151  153  154  154  159  155  159   155
  18  |    9    7    7    7    5   48    5   12    8    3 |    53   56   58   56   56   54   56   55   58    55
  19E |   14   11   11    8    5    9    6   10    9    4 |    93   92   89   90   92   93   93   92   95    92
  20  |    8    6    7   10    3    8    6   15    7    3 |    38   36   38   36   39   38   37   38   45    37
  21  |    7    7   10   11    5   12    7   13    7    3 |    31   31   34   32   33   35   33   32   38    31
  22  |    7    6   11   11    5   11    5   12    5    3 |    90   91   91   92   91   92   89   93   15    90
  23  |    9   14   10    8    4   60    5   11    8    3 |    61   66   64   63   63   77   65   66   65    63
  24  |    5    8    7    7    6   14    6    9    6    2 |    41   43   42   39   42   46   38   41   47    40
  25  |    5   11    8   11    2   10    5    8    5    3 |    43   40   41   37   44   40   36   39   42    43
  26  |    8   10    9    6    4   11    5   12    9    3 |    51   55   54   52   53   56   51   52   60    52
  27E |   14   11   27   12    6  ---   11   17   14    6 |    74   72   71   72   71  ---   71   76   74    71
  29E |    6    9    9   17    4    9    7   13    9    4 |   133  135  134  138  135  135  134  135  131   133
  30  |    8   10    7    6    5   15    6    7    6    3 |    50   50   49   48   50   55   48   50   54    49
  31  |    6    8    8    8    3   10    4    9    9    3 |    56   59   56   51   54   60   49   51   58    53
  32  |    6    8   12   10    4   11    6    8    7    3 |  9999 9999 9999 9999 9999 9999 9999 9999 9999  9999
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    8    9   12   10    5   24    7   12    8      |T   57   59   58   57   58   60   57   57   59    57
 WRMS |    8    9    9   10    5   24    6   10    7      |NE  49   51   51   49   50   53   49   49   51    49
 MEDI |    8    8    9   10    4   10    6   11    8      |MD  48   53   49   48   49   54   49   46   52    49

Table 3.2246.1   GPS week: 2246   Day: 1   MJD: 59967.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1  |    6    9    8    7    4   12    7   17    7    3 |    24   36   24   23   25   28   25   23   30    24
   2  |    6    6   10    8    4   11    6   10    6    3 |    25   26   26   24   25   29   26   25   31    24
   3  |    5   11   11   11    4   13    6   10    7    3 |    26   27   24   25   25   26   25   26   32    24
   4  |    8   17   12   11    6   52    7   13    9    4 |    32   35   30   34   31   40   36   30   42    32
   5  |    7    7   11   11    4   11    6    9   10    3 |    29   26   29   31   27   31   29   29   32    27
   6  |    6    8    6    5    4   10    5    8    8    2 |    26   26   23   25   27   27   24   22   30    24
   7  |    6    7    6    7    4   11    5   10    7    2 |    36   34   36   34   35   37   35   32   36    34
   8E |   12   11   19    9    8   18   10   13    8    5 |    43   45   41   45   42   32   40   44   47    42
   9  |    6   10    7    7    3    9    4    9   10    3 |    27   24   22   25   24   25   22   23   32    23
  10  |    4    9    8    4    4   10    5   13    6    3 |    26   27   27   24   26   29   25   24   27    24
  11  |    6    7    7    6    4   57    4   11    6    2 |    30   32   32   33   30   28   32   29   37    31
  12  |    6    6    7    9    4    8    5    8    7    2 |    29   28   28   31   29   33   27   30   33    28
  13  |    6    6    9    7    5   12    5   12    6    3 |    23   24   26   24   23   32   24   23   29    23
  14  |   10    7    5    8    6   45    8   10    7    3 |    47   47   48   50   48   52   46   48   52    47
  15  |    6    8   10   16    6   12    4    8    6    3 |    27   23   28   29   24   25   23   25   32    24
  16  |    6    7    9    7    5   10    8   11   11    3 |    25   25   26   27   26   27   24   26   32    24
  17E |    6    8   11    6    7   11    7   12    7    3 |    87   83   82   88   84   85   88   85   90    86
  18  |    7    8   10    8    4   50    7   14    8    3 |    29   31   31   33   31   32   31   32   34    30
  19E |   10   10   11    8    5   11    4   12   11    3 |    57   54   53   58   55   57   57   55   60    55
  20  |    7    4   10    8    4   10    5   13    7    3 |    23   23   24   24   23   23   23   26   29    22
  21  |    5    6   11   10    5   11    5   10    9    3 |    22   22   27   19   23   24   23   23   29    21
 X22  |    5    5    9    8    4    9    6   11  ---    3 |    74   77   75   79   76   78   76   78  ---    76
  23  |   10   13    7    7    5   62    5   16    6    3 |    39   43   44   41   41   48   43   44   46    41
  24  |    5    6    8    5    3   11    4   10    4    2 |    23   24   23   22   22   32   23   22   31    22
  25  |    5   10    6    8    4   10    5    9    8    3 |    24   23   22   22   24   29   20   20   28    22
  26  |    6    9    6    7    4    9    6    9    9    3 |    25   26   23   25   25   27   22   24   30    23
  27E |    8    8   15   21    4  ---    9   20   11    5 |    63   63   64   63   62  ---   60   67   63    61
  29E |    7    9    7   12    4   10    6    8    8    3 |    78   75   76   80   76   77   76   78   76    76
  30  |    6    7    6    6    4   11    5    9    7    2 |    23   27   26   24   25   32   24   23   30    24
  31  |    4    7    5    3    4   10    5    8    7    2 |    30   34   32   29   31   37   26   32   35    29
  32  |    6    8   12   10    5   13    8    9    9    3 |  9999 9999 9999 9999 9999 9999 9999 9999 9999  9999
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    7    9   10    9    5   24    6   11    8      |T   35   36   35   36   35   37   35   35   39    34
 WRMS |    6    9    8    8    4   24    5   10    7      |NE  29   31   30   30   30   33   29   29   33    29
 MEDI |    6    8    9    8    4   11    5   10    7      |MD  27   27   28   29   27   32   26   26   32    24

Table 3.2246.2   GPS week: 2246   Day: 2   MJD: 59968.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
   1  |    5    9    8    8    4   11    4    9    5    2 |    27   60   26   25   27   30   29   31   23    27
   2  |    8    7    7   10    5   11    4   12    6    3 |    22   21   23   22   22   22   24   22   27    22
   3  |    7   10   10    9    4   10    3   12    6    3 |    25   30   26   26   26   26   29   29   33    27
   4  |    8   18   11   11    5   55    4   14    6    4 |    39   46   39   41   40   54   46   45   49    43
   5  |   11    7    8   11    5   10    6   11    8    3 |    31   32   34   32   33   36   37   34   39    33
   6  |    8    7    7    7    5    9    4    9   10    3 |    26   28   24   25   28   28   28   26   32    26
   7  |    6    8    4    7    5   11    5    9    6    2 |    42   43   45   38   43   45   43   41   44    42
   8E |   10    8   21    8    6   11    6   12    7    4 |    22   24   20   24   21   19   23   19   27    21
   9  |    6   11    7    7    5   11    5    9    7    3 |    32   36   32   31   31   32   34   32   38    33
  10  |    4    9    7    7    4   11    4   10    7    2 |    26   27   26   24   27   27   26   26   29    25
  11  |    7    8    8   11    5   57    4   16    7    3 |    22   26   26   25   24   26   29   25   32    26
  12  |    6    7    5   11    4   10    6    7    5    2 |    32   33   34   33   32   36   35   37   34    33
  13  |    6    5    6    7    6   11    4   15    9    3 |    26   27   28   25   26   32   28   30   32    26
  14  |    9    6    5    9    5   46    7   11    8    3 |    33   37   38   37   37   48   39   34   46    37
  15  |    8    7    9   20    5   10    5   10    7    4 |    25   21   26   27   23   26   24   26   28    23
  16  |    6    6    8    9    5    8    7    8    5    3 |    27   28   29   29   29   29   33   28   32    29
  17E |    7    9   19    9    6   11    7   11   11    4 |    80   81   75   83   80   81   86   81   87    82
  18  |    9    7    8    8    5   49    5    9    7    3 |    23   25   26   27   24   29   26   24   29    25
  19E |   10    9    7   10    6   10    5   11    9    3 |    60   61   61   61   60   61   63   61   66    61
  20  |    9    4    9    7    4    8    4   12    9    3 |    22   25   25   22   24   26   27   26   31    24
  21  |    6    7   10    9    5   12    6   13    5    3 |    22   24   27   23   24   24   24   25   28    23
 X22  |    6    6    8    8    6    9    6   10  ---    3 |    92   91   90   90   93   91   88   96  ---    90
  23  |   10   12   10    7    6   63    4   14    6    3 |    47   51   48   49   49   60   51   54   54    50
  24  |    5    9    8    5    5   11    7   10    5    2 |    24   26   25   23   23   33   25   27   28    24
  25  |    5   10    7    8    4    9    5   11    5    3 |    22   21   20   19   21   25   18   18   23    21
  26  |    7    9    6    7    2    8    4    9    6    2 |    28   31   30   28   29   33   31   28   32    29
  27E |    9    5    9   11    4   18    6   13   10    3 |    25   26   31   30   26   28   24   24   28    25
  29E |    8    7    8   16    4   10    6   12    6    3 |    72   75   78   78   75   75   77   76   73    75
  30  |    6    8    7    6    5   13    4    9    6    2 |    21   25   22   18   22   30   21   21   23    20
  31  |    6    8    7    8    4    9    7    8    6    3 |    40   41   41   36   38   43   38   39   38    38
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    8    9    9    9    5   24    5   11    7      |T   34   37   35   35   35   38   36   36   37    35
 WRMS |    7    8    8    9    5   24    5   10    7      |NE  31   34   32   31   32   36   33   33   33    32
 MEDI |    7    8    8    8    5   11    5   11    6      |MD  26   28   28   27   27   30   29   28   32    27

Table 3.2246.3   GPS week: 2246   Day: 3   MJD: 59969.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
  X1  |    7    7    9    9    7   13    9    9  ---    3 |    24   44   29   29   27   28   32   26  ---    27
   2  |    8    5    8   12    4   10    7    9    6    3 |    26   30   32   26   29   26   31   28   32    28
   3  |    7    9   14   10    7   13    6    8    6    3 |    26   29   27   24   27   26   27   27   28    25
   4  |   10   17   15   16    6   51    8   12    9    5 |    30   40   31   30   34   48   35   34   41    33
   5  |    8    8   18   14    3    9    7   12    8    4 |    28   28   36   24   29   30   30   31   32    28
   6  |    6    7   10    8    3   10    6    6    8    3 |    27   29   27   29   29   31   29   28   30    27
   7  |    5    8    9    8    5    7    9   16    5    3 |    51   47   53   49   51   52   53   52   48    49
   8E |    8   10   25   12    8   11   11   13    7    5 |    24   26   24   27   23   27   32   26   32    25
   9  |    7   10    9   10    4   11    6   13    9    3 |    26   29   26   25   26   27   27   27   29    25
  10  |    4    7   10    6    5   11    6    6    8    2 |    30   32   34   28   30   31   29   31   31    29
  11  |    8    6    9   12    4   59    7   10    6    3 |    23   26   26   27   26   26   28   25   29    25
  12  |    8    7   11   11    5    9    8   10    6    3 |    43   41   45   41   43   44   43   46   45    42
  13  |    6    6   12   11    3    9    7    8    7    3 |    25   26   27   27   26   30   30   26   29    25
  14  |   10    9    6   12    6   47   10   12   10    4 |    32   37   38   37   37   50   44   35   46    38
  15E |    7    8   13   12    4   10    6    8    8    3 |    37   38   41   36   39   39   44   42   44    39
  16  |    5    6    7   11    5   10    8    7    7    3 |    27   30   29   28   30   30   32   29   33    29
  17E |    6    9    9   14    6   10   10    8    9    3 |    65   67   70   66   68   65   67   68   68    66
  18  |    8    6   10   12    4   50    7   10   12    3 |    25   30   28   28   29   33   34   27   36    28
  19E |    9    8    9   16    5   11    6   10    8    3 |    38   39   39   37   40   41   40   40   45    39
  20  |    8    6    9   14    4   10    5   10    9    3 |    25   26   29   25   27   27   31   30   31    26
  21  |    6    6   10    9    6   13    9   13    6    3 |    24   25   31   28   26   27   33   27   34    27
 X22  |    8    7   11   13    6   11    6   13  ---    4 |    69   71   71   69   70   70   71   70  ---    70
  23  |    9   12   16    8    5   59    7   10   10    4 |    29   36   33   32   32   47   35   35   36    32
  24  |    6    6    8    5    3   11    7    9    9    3 |    29   30   31   27   31   35   35   34   33    30
  25  |    6   10    8   11    4   11    7   11   11    3 |    26   35   35   33   30   38   35   37   39    27
  26  |    4   11    5    9    5    9    7    8    5    3 |    30   33   30   28   31   32   31   30   31    29
  27E |    9    8   17   17    7   14   11   17    8    5 |    27   27   26   29   26   30   34   25   34    27
  29E |    9    7   13   14    5   10   11   17    6    4 |    56   54   59   56   56   53   55   55   58    55
  30  |    5   10    8   11    4   10    6   18    5    3 |    31   30   33   31   34   38   37   42   36    33
  31  |    6    7    7    9    5   10    7    9    6    3 |    37   41   39   33   36   43   36   41   39    37
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    7    8   12   12    5   24    8   11    8      |T   33   35   35   33   34   37   37   35   37    34
 WRMS |    7    9   11   11    5   24    7    9    8      |NE  30   34   34   31   32   36   35   34   34    32
 MEDI |    7    7    9   11    5   11    7   10    8      |MD  28   30   31   29   30   32   34   31   34    29

Table 3.2246.4   GPS week: 2246   Day: 4   MJD: 59970.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
  X1  |    5    8   11    5    5   13    4    8  ---    3 |    45   66   41   43   45   47   40   45  ---    43
   2  |   10    8    9    8    4   11    5    6    9    3 |    40   39   41   43   41   41   37   41   44    39
   3  |    8    9    7    5    6   10    5    8    5    2 |    49   51   47   49   47   48   46   47   50    47
   4  |   10   19   11   11    7   53    5   14    9    4 |    62   66   60   64   63   71   62   63   67    63
   5  |   10    8   17    7    7   10    7   11    7    4 |    51   50   55   52   52   53   48   52   53    50
   6  |    6    8    8    5    5   12    5    8    7    2 |    46   47   46   46   46   46   41   44   49    44
   7  |    7    8    7    7    4   10    5    9    8    3 |    58   56   55   55   56   59   55   55   59    55
   8E |    9    9   19   12    5   11    5    9    6    4 |    28   29   28   29   26   32   25   27   30    26
   9  |    8    9   10    6    5   10    4    7    8    3 |    55   54   52   53   52   54   52   52   55    52
  10  |    5   10   10    6    5   12    5    3    7    3 |    47   45   44   47   45   47   40   44   45    43
  11  |   11    7   10    9    5   56    5   11    7    3 |    44   45   47   47   45   45   43   44   48    44
  12  |   10    8   10   11    4    8    5    8    7    3 |    58   59   59   59   57   62   55   54   58    56
  13  |    8    7    9   10    7   10    4    9    8    3 |    45   44   45   48   46   51   44   47   50    45
  14  |   10    7   10    8    5   42    7   12    8    3 |    49   48   49   50   49   54   49   50   52    49
  15E |   10    7   14   11    7   14    6    9    6    3 |    46   45   48   50   48   50   44   50   49    46
  16  |    7    7    7    9    5    7    8    9    8    3 |    53   54   52   56   54   56   52   54   56    53
  17E |    8   10   13   14    6   11   11   10    9    4 |    99   97   96   96   97   98   99   98  101    97
  18  |   10    9    7    8    4   50    5   11   10    3 |    46   46   47   49   45   46   43   46   48    45
  19E |   11   10    9    7    5   14    5    7   10    3 |    80   83   80   79   81   82   79   81   85    80
  20  |   10    5    9    8    5   11    3   13    8    3 |    45   44   47   46   45   45   42   49   46    44
  21  |    5    8   11    8    7   13    6   10    7    3 |    42   42   42   42   42   43   37   42   43    40
 X22  |    9    6   15    9    9    8   10    9  ---    4 |    98   99  101   97   99   96   95   96  ---    97
  23  |   11   12   12    7    6   60    5   12    9    4 |    59   59   57   62   58   65   56   59   60    58
  24  |    7   10    9    9    6   12    7    6    8    3 |    47   48   47   50   47   53   41   45   44    45
 X25  |    3  ---  ---  ---   12  ---  ---  ---  ---    0 |    45  ---  ---  ---   43  ---  ---  ---  ---    44
  26  |    7    9    6    8    4    9    3    8    6    2 |    54   55   53   55   54   60   51   51   57    53
  27E |    9    5   22    9    6   11    5    9    7    4 |    27   27   25   30   25   36   26   29   26    25
  29E |   11    9   10   11    5    9    7   16    9    4 |    91   90   93   96   93   91   89   97   90    91
  30  |    8    9    9    4    4   13    4    8    7    2 |    47   46   44   46   45   51   43   44   47    44
  31  |   10    7    7    6    5    9    7   11    7    3 |    54   54   52   51   52   58   49   53   51    51
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    9    9   11    9    5   24    6   10    8      |T   53   54   53   54   53   56   51   53   54    52
 WRMS |    9    9   11    8    5   24    5    8    7      |NE  51   52   51   52   51   54   48   51   51    50
 MEDI |    9    8   10    8    5   11    5    9    8      |MD  47   50   48   50   47   53   46   50   50    46

Table 3.2246.5   GPS week: 2246   Day: 5   MJD: 59971.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
  X1  |    7    8   10    7    6   13    9    9  ---    3 |    38   68   37   36   39   41   33   43  ---    37
   2  |   11    7    9   13    3   10    6    9   11    3 |    44   45   48   42   45   46   41   45   52    43
   3  |   10    9   17    7    6   12    8    8   12    4 |    35   38   33   35   36   39   31   38   42    34
   4  |    9   20   14   10    5   52    7   15    8    5 |    30   40   34   38   35   44   34   42   41    34
   5  |    7    7   14   10    6   12    9   10    9    4 |    33   31   38   32   34   35   30   36   42    32
   6  |    6    9    9    6    4   10    4    9    8    3 |    39   42   43   40   42   39   37   43   46    40
   7  |    7    7    6    8    4   10    5   10   11    3 |    39   39   39   39   39   40   38   39   48    39
   8E |   10    9   22   12    6   12    6   12   16    5 |    64   66   61   64   65   59   59   69   65    62
   9  |    7   10   12    8    4    9    7   12   10    3 |    31   32   32   31   31   33   26   33   36    29
  10  |    7   10    7    7    5   12    7    7   12    3 |    39   38   37   37   37   41   31   39   43    35
  11  |    8   10   10    8    5   54    4   13    8    3 |    43   47   50   46   46   43   44   47   51    45
  12  |    7    8    8    9    3   10    6    5    9    3 |    46   45   49   43   46   50   43   45   49    44
  13  |   11    7   16   11    6   12    5   14   11    4 |    32   33   38   33   34   38   30   36   40    32
  14  |   13    7   10   10    4   43    8   10   15    4 |    60   62   62   59   60   64   58   62   64    60
  15E |   10    7   10    8    4   15    6   12   11    3 |    34   34   38   36   36   33   33   39   46    35
  16  |    4    8    8   12    4    9    6   10   12    3 |    27   28   27   28   27   31   25   31   34    26
  17E |   13   17   12   15   11   13   17   11   23    6 |    75   70   73   77   73   75   83   77   87    77
  18  |    9    8   10   12    3   52    5    9   11    3 |    47   47   49   48   47   48   43   50   52    46
  19E |   11   11   17    8    4   10    8   10   16    4 |    39   35   33   35   35   38   41   36   46    37
  20  |    7    5    8    9    5   13    4   10    9    3 |    39   39   40   38   39   38   35   43   46    38
  21  |    7    6    8    9    4   14    8   10   10    3 |    38   40   37   37   40   43   35   44   44    37
 X22  |    9    7    9   10    8   11   10   16  ---    4 |   140  142  142  144  143  145  137  146  ---   141
  23  |   10   12    9    7    3   62    6    8   11    3 |    42   43   44   45   42   52   41   41   45    42
  24  |   10    9    8    7    3   13    5    8   14    3 |    38   38   42   40   39   45   33   39   45    37
 X25  |    5    9    7  ---    6  ---    5  ---  ---    4 |    22   25   25  ---   23  ---   20  ---  ---    23
  26  |    5    8   10   12    3    9    5    7    9    3 |    37   37   33   37   35   43   33   37   43    35
  27E |    9    6   15   12    6   11    7    8   11    4 |    69   70   66   69   70   55   65   75   70    68
  29E |   12    7    9   11    6   12   10   17   12    4 |    86   87   87   84   87   84   87   89   87    86
  30  |    7    9    7    9    4   13    6    7   12    3 |    42   44   41   42   43   46   40   44   49    42
  31  |    5    8    7   10    3   11    5   11   10    3 |    40   42   38   39   40   48   37   42   48    39
------+---------------------------------------------------+----------------------------------------------------
 RMS  |    9    9   11   10    5   25    7   10   12      |T   69   71   70   68   69   68   67   69   71    68
 WRMS |    8    9   11   10    5   25    6    9   11      |NE  71   74   72   70   71   71   68   70   72    70
 MEDI |    8    8    9    9    4   12    6   10   11      |MD  39   42   40   39   40   43   37   43   46    39

Table 3.2246.6   GPS week: 2246   Day: 6   MJD: 59972.000                            

        Weighted Average                                       Orbit Dynamics (7 days)
 PRN  |  cod  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+---------------------------------------------------+----------------------------------------------------
  X1  |    6  324    8    6    4    9    4   12  ---    3 |    21  192   22   23   22   22   21   20  ---    20
   2  |    9    7    8    9    4   11    7    9    8    3 |    25   27   29   26   27   27   26   27   27    25
   3  |    8    9   10    7    4   11    5    7    9    3 |    29   29   29   28   29   31   26   29   31    27
   4  |   10   21   15   12    7   56    8   13   10    5 |    37   46   35   43   40   57   42   36   45    39
   5  |   10    7    8    8    4   11    8    6   10    3 |    28   25   32   28   28   32   25   27   34    27
   6  |    9    8    7    6    3   13    6    5   10    3 |    27   27   25   25   26   24   23   27   27    25
   7  |    8    6    7    7    3    9    5    8    7    2 |    61   60   60   57   61   63   62   61   62    60
   8E |    8    9   19    9    4   12    6   10    6    4 |    48   47   50   51   47   35   47   46   48    46
   9  |    8    9   11    8    5   11    7    9    8    3 |    25   24   24   24   24   27   23   27   31    23
  10  |    7    9   10    6    3   12    7    7    5    3 |    24   25   28   23   25   26   23   25   25    23
  11  |   11    7    7    7    4   53    5   10   10    3 |    45   45   45   45   44   41   44   43   44    44
  12  |    8    7    7    9    4    8    6    7    8    3 |    48   49   48   43   45   50   44   43   45    45
  13  |    8    6    7    9    6   12    6    8    7    3 |    19   21   21   22   19   27   20   21   26    19
  14  |   10    8    7    7    5   47    5   11   11    3 |    61   64   63   64   63   74   63   65   68    63
  15E |   10    8    7   11    6   13    6   10    7    3 |    31   29   32   31   32   32   29   32   31    29
  16  |    5    4   10    8    3    8    9    8    8    3 |    29   32   35   31   31   32   29   31   32    30
  17E |   21   14   11   16    8   10   10   16   10    6 |   138  136  137  141  137  139  139  140  138   138
  18  |   10    7   12   11    4   50    8   10    8    4 |    45   46   50   47   47   45   47   47   52    46
  19E |   20    7   14    8    5   14    7    7   22    5 |    82   80   76   74   79   81   78   80   78    78
  20  |   13    5    6    8    4   12    6    9   12    3 |    25   23   27   24   26   28   25   25   33    24
  21  |    7    7    6    8    4    9    6   12    9    3 |    19   19   20   19   20   19   20   20   23    18
 X22  |    6    7   12    8    7   12    7   14  ---    4 |   137  135  134  136  135  135  135  137  ---   135
  23  |    9   11   11    6    5   61    8   11    6    3 |    44   47   44   48   43   62   51   48   47    46
  24  |    7    9    8    7    4    9    7    6    6    3 |    25   27   30   23   26   32   25   25   29    25
 X25  |    6   10    9   10    4    9    7    9  ---    4 |    22   27   23   12   22   20   21   10  ---    23
  26  |    8    8    7    8    3    9    7   12   10    3 |    26   28   28   23   27   32   26   26   29    25
  27E |    7    7   15    9    5   11    7   11    9    4 |    60   59   56   64   59   29   61   60   61    59
  29E |   13   10   13   32   11   13   19   11   22    7 |   155  157  156  160  154  156  157  156  153   156
  30  |    9    9    7   10    4   11    4   12    8    3 |    34   37   35   35   36   39   34   39   38    35
  31  |    7    8    8    5    3    9    7    8    8    3 |    38   43   42   36   37   43   34   34   35    36
------+---------------------------------------------------+----------------------------------------------------
 RMS  |   10    9   10   10    5   25    7   10   10      |T   46   53   47   46   47   48   46   46   47    46
 WRMS |    9    9   10    8    5   25    6    8   10      |NE  37   45   38   36   37   41   37   37   37    36
 MEDI |    8    8    8    8    4   11    7    9    8      |MD  31   37   35   31   32   32   29   32   35    30



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 4.2246   GPS week: 2246   MJD: 59966.0-59972.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2961 |U    9    10    29 |U   11    14    42 |U   12    11    31 |
esa | esa 2962 |    16    18    45 |U   12    12    59 |U   15    12    35 |
gfz | gfz 2961 |U    9     9    28 |U   11    14    38 |    12    10    33 |
grg | grg 2947 |    10    12    29 |    10    15    42 |    13    11    34 |
igr | igr 2958 |    10     9    29 |    10    11    38 |    12    11    31 |
igs | igs 2934 |     9     9    28 |    10    12    39 |    12    10    31 |
jpl | jpl 2893 |    19    20    50 |U   13    11    58 |    18    11    45 |
mit | mit 2962 |U   29    22    95 |U   53    56   191 |U   44    47   122 |



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 5.2246.0   GPS week: 2246   Day: 0   MJD: 59966.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9    10    25 |    10    15    40 |    10    10    27 |
esa | esa 2976 |    14    14    45 |    13    16    61 |    13    13    29 |
gfz | gfz 2976 |     7     7    25 |    12    16    42 |     9     7    26 |
grg | grg 2976 |     9    10    24 |     9    15    45 |    10     8    29 |
igr | igr 2976 |     9     6    27 |    11    14    39 |    11    10    24 |
igs | igs 2976 |     8     7    26 |    10    14    44 |    10     8    24 |
jpl | jpl 2784 |    17    17    48 |    15    11    51 |    17    11    42 |
mit | mit 2976 |    16    21    36 |    19    38    80 |    14    17    40 |

Table 5.2246.1   GPS week: 2246   Day: 1   MJD: 59967.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9    12    23 |     9    13    37 |    10    11    30 |
esa | esa 2976 |    15    22    46 |    11    11    55 |    12    11    34 |
gfz | gfz 2976 |     8    13    23 |    15    20    41 |     8    10    33 |
grg | grg 2976 |    11    15    23 |     8    14    39 |    11    10    36 |
igr | igr 2974 |    10    12    26 |     9    10    34 |    10    10    31 |
igs | igs 2974 |     9    13    24 |     9    11    37 |    10     9    31 |
jpl | jpl 2880 |    18    23    51 |    12    10    51 |    13    11    46 |
mit | mit 2976 |    12    16    29 |    11    12    37 |    13    16    34 |

Table 5.2246.2   GPS week: 2246   Day: 2   MJD: 59968.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    10    17    36 |    12    12    60 |    14     9    30 |
esa | esa 2976 |    14    18    43 |    11    11    57 |    15    11    36 |
gfz | gfz 2976 |     7     9    28 |    10    11    32 |    11    10    34 |
grg | grg 2975 |    10    12    27 |    10    15    38 |    14    10    38 |
igr | igr 2976 |     8     9    26 |    10     9    33 |    12    10    31 |
igs | igs 2976 |     8    10    28 |    10    11    35 |    12     9    32 |
jpl | jpl 2976 |    16    19    42 |    13     8    59 |    17    10    44 |
mit | mit 2976 |   118    62   437 |   249   220   875 |   215   218   617 |

Table 5.2246.3   GPS week: 2246   Day: 3   MJD: 59969.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2973 |     8    12    36 |    13    13    33 |    12     9    36 |
esa | esa 2976 |    15    20    47 |    13    14    57 |    16    12    41 |
gfz | gfz 2974 |     9    12    37 |    11    12    34 |    12     9    38 |
grg | grg 2972 |     9    16    34 |    12    16    39 |    13    11    36 |
igr | igr 2955 |     9    11    36 |    11    13    35 |    12    10    35 |
igs | igs 2877 |     9    13    34 |    12    13    36 |    12     9    36 |
jpl | jpl 2880 |    18    23    50 |    15    12    54 |    17    13    47 |
mit | mit 2976 |    15    14    45 |    14    27    53 |    15    15    40 |

Table 5.2246.4   GPS week: 2246   Day: 4   MJD: 59970.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2880 |    10     6    29 |  ----  ----  ---- |    14    13    34 |
esa | esa 2880 |    20    20    54 |  ----  ----  ---- |    15    12    37 |
gfz | gfz 2878 |    11     8    34 |  ----  ----  ---- |    14    13    37 |
grg | grg 2880 |    12    10    38 |  ----  ----  ---- |    15    12    37 |
igr | igr 2877 |    13    12    38 |  ----  ----  ---- |    14    12    34 |
igs | igs 2880 |    12     9    35 |  ----  ----  ---- |    14    12    36 |
jpl | jpl 2880 |    22    22    59 |  ----  ----  ---- |    19    10    45 |
mit | mit 2880 |    15    14    39 |  ----  ----  ---- |    16    20    43 |

Table 5.2246.5   GPS week: 2246   Day: 5   MJD: 59971.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     8    10    27 |     8    15    37 |    14    11    29 |
esa | esa 2976 |    16    17    42 |    11    12    61 |    15    10    27 |
gfz | gfz 2976 |     9     8    20 |     9    14    37 |    14    11    30 |
grg | grg 2880 |     9    11    26 |     9    15    47 |    15    12    31 |
igr | igr 2976 |     9     8    28 |     9    13    42 |    13    11    27 |
igs | igs 2880 |     9     8    27 |     9    14    39 |    13    11    28 |
jpl | jpl 2880 |    20    18    55 |    11    13    69 |    22    12    45 |
mit | mit 2976 |    16    12    36 |    16    21    57 |    17    23    41 |

Table 5.2246.6   GPS week: 2246   Day: 6   MJD: 59972.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9     7    28 |    14    14    44 |    12    12    32 |
esa | esa 2976 |    18    16    41 |    13    10    66 |    17    12    43 |
gfz | gfz 2976 |     9     6    28 |    11    10    42 |    13    13    35 |
grg | grg 2976 |    10    10    29 |    12    13    44 |    13    13    35 |
igr | igr 2976 |    10     7    26 |    11     9    43 |    12    12    33 |
igs | igs 2976 |     9     7    25 |    11    10    41 |    12    11    32 |
jpl | jpl 2976 |    20    17    45 |    13    10    65 |    19    11    46 |
mit | mit 2976 |    11    13    40 |    11    21    43 |    18    19    38 |


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 6.2246   GPS week: 2246   MJD: 59966.500-59972.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       2     -11     -20       0      4 |       6     36
            |      12      16      65      79      5 |       4
esa   uuuuu |     -12     -10     -25     -38     -2 |      18     36
            |      11       9      82      50      4 |       4
gfz   uuuuu |     -13     -11     -65      16      1 |       5     33
            |      34      19      99     129      3 |       4
igr   xxxxx |     -16      -1     -47      16      1 |       0     32
            |       8      12      89      92      5 |       4
irf   xxxxx |       4       2     -17      32     -3 |       0     32
            |       7       8      32      41      6 |       3
jpl   xxxxx |      28      31     -85      32     -5 |      24     38
            |      12      31      68      76     13 |       5
mit   uuuuu |      11      27      69      11     -3 |      19     36
            |      19      18      53      30      7 |       3
ngs   uuuxu |       9     -15      -6     242      0 |      11     33
            |      42      35     119     262      5 |       4
sio   xxxxx |     119      75    -376     -55      0 |      24     38
            |      35      36     108      83     15 |       4


Table 7.2246.0   GPS week: 2246   Day: 0   MJD: 59966.500

                                                         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 |       3     -20     -12      72      8 |       0     29
esa   uuuuu |     -27     -19      73      21     -5 |      13     30
gfz   uuuuu |     -54      -5    -106    -190      3 |       0     28
igr   xxxxx |     -15       6    -118     150     -4 |      -6     28
irf   xxxxx |      -6       8     -62     107     -4 |      -4     29
jpl   xxxxx |      23      57    -109     145      7 |      15     29
mit   uuuuu |       9      50     -31      34     -5 |      14     30
ngs   uuuxu |      84     -46     112     669     -1 |       5     27
sio   xxxxx |     163      42    -422      64      7 |      17     30

Table 7.2246.1   GPS week: 2246   Day: 1   MJD: 59967.500

                                                         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 |       3       3      71      63      5 |       5     33
esa   uuuuu |     -19     -17     -63     -56      4 |      17     34
gfz   uuuuu |     -55      -7    -147    -115     -3 |       5     31
igr   xxxxx |     -18       5      26      93     10 |      -1     29
irf   xxxxx |      10       1     -34      69     -7 |       1     30
jpl   xxxxx |      33      30     -86     -87     10 |      23     36
mit   uuuuu |      40      12      61      43     -7 |      19     34
ngs   uuuxu |       1      -4       0     527      2 |      10     30
sio   xxxxx |     171      27    -497     -52    -14 |      24     36

Table 7.2246.2   GPS week: 2246   Day: 2   MJD: 59968.500

                                                         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 |      10      -7     -63      38      6 |       5     33
esa   uuuuu |     -19      -9     -56     -80      0 |      18     34
gfz   uuuuu |     -26     -29      28     -32     -4 |       5     31
igr   xxxxx |      -6     -22      13     -90      1 |       0     30
irf   xxxxx |       9       5     -42      13     -8 |       0     30
jpl   xxxxx |      32      65    -175     -11    -21 |      25     37
mit   uuuuu |      24      22      54      35    -10 |      20     34
ngs   uuuxu |     -20       5      15     217      6 |      11     30
sio   xxxxx |     115      62    -479     -51     -5 |      24     36

Table 7.2246.3   GPS week: 2246   Day: 3   MJD: 59969.500

                                                         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 |      -9     -20     -96      -5      9 |      10     35
esa   uuuuu |     -10      -2     -41     -79     -1 |      22     36
gfz   uuuuu |     -12      14     -23     113      1 |       9     31
igr   xxxxx |      -8      16      39      48      0 |       5     29
irf   xxxxx |       4      15     -16       6    -11 |       4     30
jpl   xxxxx |      34      64    -116      13    -22 |      28     38
mit   uuuuu |      11      45      82       9    -10 |      23     36
ngs   uuuxu |      25     -49     120     -37      1 |      15     32
sio   xxxxx |      90     110    -400    -148    -22 |      27     38

Table 7.2246.4   GPS week: 2246   Day: 4   MJD: 59970.500

                                                         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     -19     -10    -164     -4 |      10     35
esa   uuuuu |      -5     -16     -73      27     -5 |      22     36
gfz   uuuuu |       2      -2    -194     109      1 |       8     31
igr   xxxxx |     -31      -8    -203      46     -6 |       5     29
irf   xxxxx |      -4      -4     -10       3     -1 |       3     29
jpl   xxxxx |      41       7     -26       0     -3 |      28     38
mit   uuuuu |     -22      38     133      16      2 |      22     35
ngs   uuuxu |      30     -39      -1     120      5 |      16     33
sio   xxxxx |     115      83    -297     -86      3 |      26     37

Table 7.2246.5   GPS week: 2246   Day: 5   MJD: 59971.500

                                                         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 |     -20      17      51       0      7 |       2     43
esa   uuuuu |       5       6    -119      -7     -7 |      14     41
gfz   uuuuu |      22      -6     -96      90      3 |       1     38
igr   xxxxx |     -17       1     -74     -65      3 |      -3     39
irf   xxxxx |       9      -3      29      23      5 |      -5     38
jpl   xxxxx |      30       0    -116      74      1 |      21     42
mit   uuuuu |       7       0     115     -38      6 |      15     39
ngs   uuuxu |     -16     -20     -54     184     -9 |       9     38
sio   xxxxx |      99     131    -345    -150     23 |      20     41

Table 7.2246.6   GPS week: 2246   Day: 6   MJD: 59972.500

                                                         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     -31     -84      -3     -2 |       8     44
esa   uuuuu |      -9     -10     106     -90     -2 |      18     43
gfz   uuuuu |      32     -44      83     137      5 |       7     39
igr   xxxxx |     -20      -4     -15     -67      0 |       2     40
irf   xxxxx |       7      -9      17       1      2 |       1     40
jpl   xxxxx |       5      -6      33      88     -4 |      27     46
mit   uuuuu |       8      21      69     -20      5 |      20     43
ngs   uuuxu |     -42      50    -235      16     -6 |      13     39
sio   xxxxx |      80      69    -190      39      8 |      28     47


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