[IGSREPORT-28855] Wk 2221 IGS Final Orbits

acc acc at igs.org
Sun Aug 21 03:28:51 UTC 2022


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2221   (Jul 31, 2022 - Aug 06, 2022)

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:

igs2221[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs2221[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs2221[0-6].cls  IGS GPS clock combination summary report.
igs22217.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs22217.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  |  EMR   | MDVJ
                0  |  ESA   | PTBB
                0  |  GFZ   | 13 DAV1 NYA2 SFER DAV1 NYA2
                0  |  GRG   | 13 CHTI BRFT STK2
                0  |  JPL   | CHTI MCIL RIOP
                0  |  MIT   | SPT0 SPT0
                1  |  COD   | HYDE CKSV HYDE
                1  |  EMR   | DAEJ STR1 TIDB
                1  |  ESA   | CKSV IRKJ
                1  |  GFZ   | HERS IRKJ JPLM NYA1 SFER HERS JPLM
                1  |  GRG   | 13 13 ADIS BJFS BRST CAS1 CHTI GRAC INVK IRKJ KRGG
                1  |  GRG   | LMMF REYK STK2 CHTI GRAC INVK IRKJ REYK SCUB SVTL
                1  |  GRG   | WIND
                1  |  JPL   | AREQ BADG CZTG
                1  |  MIT   | HOB2 NIST SPT0 HOB2 NIST SPT0
                2  |  COD   | SYOG SYOG
                2  |  EMR   | 27
                2  |  ESA   | PTBB PTBB
                2  |  GFZ   | 13 NOVM SYOG
                2  |  GRG   | 13 27 CHTI GRAC YEL2 SYOG YEL2
                2  |  JPL   | CHTI RIOP BADG CZTG
                2  |  MIT   | YEL2
                3  |  COD   | SYOG CKSV MAYG SYOG USN7
                3  |  EMR   | MDVJ
                3  |  ESA   | DAV1 DAV1
                3  |  GFZ   | SAVO SYOG USN7 DAV1 SAVO SYOG
                3  |  GRG   | 13 GRAC GRAC SVTL
                3  |  JPL   | KOUC NYA1 RIOP KOUC NYA1
                3  |  MIT   | BHR4
                4  |  COD   | RAEG RAEG
                4  |  GFZ   | 13 SFER DAV1
                4  |  GRG   | 13 13 ADIS DAV1 INVK SVTL DAV1 SVTL
                4  |  JPL   | CNMR DAV1 MCIL CZTG DAV1 KOUC
                4  |  MIT   | CEBR HOB2 KOUG KOUR NNOR ONSA SYDN TLSG CEBR HOB2
                4  |  MIT   | KOUG KOUR NNOR ONSA SYDN TLSG
                5  |  COD   | 21 DAV1 RAEG DAV1 MONP
                5  |  ESA   | BARH MDO1 MDO1
                5  |  GFZ   | 21 AREQ SFER STJO HARB STJO
                5  |  GRG   | GRAC KRGG PARC SCUB STJO GLSV HARB LMMF SCUB STJO
                5  |  JPL   | XMIS
                5  |  MIT   | SPT0 SPT0
                6  |  GFZ   | HERS POHN HERS POHN
                6  |  GRG   | GAMB GRAC INVK KRGG REYK GAMB GRAC SVTL WIND
                6  |  JPL   | RIOP

 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
               ----+--------+---------------
                3  |  GFZ   |   8
                4  |  GFZ   |   8
                5  |  GFZ   |   8
                6  |  GFZ   |   8

 7. 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.

 8. 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 |     .6     .5     .9      13     -8      8    -.55
       EMR  |   0 |    -.7  -10.8   -7.3     -32    -53     -3    -.32
       ESA  |   0 |   -2.0   -2.0    -.2       0    -21     37    -.74
       GFZ  |   0 |     .5    -.4     .4      -2    -23     17    -.46
       GRG  |   0 |    6.0   -4.0    1.9       2    -30    -21    -.05
       JPL  |   0 |   13.3  -17.4   -6.2       0     -2     25    -.28
       MIT  |   0 |    3.0    -.5  -11.5     -11     -6     -5    -.21
       NGS  |   0 |    3.6   -6.6   -1.9     -33    -13     39    -.50
       SIO  |   0 |   -1.6    3.0   -9.9     -12     66     40    -.49

       COD  |   1 |     .7     .0     .9      -3    -14      3    -.59
       EMR  |   1 |   -8.1   -2.9  -10.6     -34    -44     30    -.28
       ESA  |   1 |   -1.6   -1.2     .0     -11    -20     41    -.83
       GFZ  |   1 |     .9    -.4    1.0       3    -14     14    -.55
       GRG  |   1 |    6.4   -9.1  -12.2       0    -30     -8    -.06
       JPL  |   1 |   12.5  -10.6   -5.8       6      3     24    -.25
       MIT  |   1 |    2.6   -6.1   -9.8      14      1     -4    -.20
       NGS  |   1 |   -1.6  -11.4    -.6     -43     -1     37    -.33
       SIO  |   1 |   -3.2   -1.9  -12.6     -46    111      1    -.43

       COD  |   2 |     .7     .3    1.3       8     -4      6    -.64
       EMR  |   2 |  -15.4    2.8  -12.7     -37    -38     15    -.32
       ESA  |   2 |   -1.3   -1.8    -.9       7    -10     43    -.78
       GFZ  |   2 |    1.1    -.9     .5      -6    -28     17    -.63
       GRG  |   2 |    5.2   -4.6   -4.3      -2    -49     -2    -.14
       JPL  |   2 |   12.6  -10.5   -7.5      -5     -4     25    -.31
       MIT  |   2 |    3.0   -2.7  -12.2     -10    -12    -23    -.35
       NGS  |   2 |   -5.7   -1.4   -9.4     -27    -39     22    -.44
       SIO  |   2 |   -4.1    4.3  -18.2       0    156     91    -.69

       COD  |   3 |     .7     .2    1.2       7     -4      3    -.73
       EMR  |   3 |  -10.7    5.1  -10.2     -53    -37     19    -.25
       ESA  |   3 |   -1.5   -1.8   -1.1      -9    -20     36    -.71
       GFZ  |   3 |     .8    -.3     .4       4    -20     13    -.55
       GRG  |   3 |    7.8   -4.9   -4.1      -1    -30    -10    -.16
       JPL  |   3 |    8.0   -6.8   -6.3       0     -4      0    -.38
       MIT  |   3 |    -.1   -1.3   -8.9      -6     -9    -10    -.37
       NGS  |   3 |    -.7    -.4   -6.1       2    -11      7    -.61
       SIO  |   3 |   -1.6    4.9  -14.6      11    125    120    -.67

       COD  |   4 |     .6    -.1    1.0      -1     -2      1    -.67
       EMR  |   4 |   -6.9    3.7  -12.6     -30    -31     10    -.22
       ESA  |   4 |   -1.3   -1.6    -.8      12      0     36    -.69
       GFZ  |   4 |     .8    -.0     .9      13    -12      7    -.63
       GRG  |   4 |    1.7   -5.5   -7.2      -2    -29    -17    -.06
       JPL  |   4 |    7.6   -5.4   -8.5       1     -3      0    -.15
       MIT  |   4 |    -.8   -1.3   -8.3      -3     -6     -3    -.26
       NGS  |   4 |    -.9   -5.2  -10.8     -15    -11     44    -.44
       SIO  |   4 |   -6.2    2.2   -9.0     -13     87     94    -.69

       COD  |   5 |     .5     .2    1.1       3     -5      4    -.56
       EMR  |   5 |   -6.4    3.8  -10.8     -36    -36     20    -.22
       ESA  |   5 |   -1.4   -1.6    -.7      -5     -9     42    -.66
       GFZ  |   5 |     .6    -.2     .7      -1    -18     16    -.59
       GRG  |   5 |    3.9   -2.3   -4.5       1    -18    -23    -.06
       JPL  |   5 |    9.0   -7.7  -10.1       1      2    -13    -.07
       MIT  |   5 |    1.3   -1.5   -9.8      -3     11      1    -.20
       NGS  |   5 |    -.5    -.1   -2.7     -13      6     10    -.53
       SIO  |   5 |   -4.8    4.5  -16.5      35    149    130    -.36

       COD  |   6 |     .4    -.1     .9       2     -2     -1    -.47
       EMR  |   6 |   -2.0    5.4   -7.7     -32    -25    -15    -.19
       ESA  |   6 |   -1.1   -1.8   -1.0     -11     -1     45    -.66
       GFZ  |   6 |     .8    -.2    1.1      18    -16     10    -.50
       GRG  |   6 |    2.7   -2.9   -3.0       2    -21    -24    -.14
       JPL  |   6 |    8.7   -5.8   -4.0       0     -3      1    -.14
       MIT  |   6 |    1.1   -1.3   -9.1     -10    -10    -15    -.12
       NGS  |   6 |    -.1   -3.3   -8.4     -13    -21     23    -.31
       SIO  |   6 |   -4.4    2.3   -4.6      23     38     94    -.46


 9. 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.

10. 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


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 1.2221.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2221.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 2.2221.[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 3.2221.[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 5.2221.0-6). 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 2221 summary.                       (Jul 31, 2022 - Aug 06, 2022)

Table 1.2221.a   GPS week: 2221   MJD: 59791.000-59797.000

         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  681|    0     0     2     7   -26    11  -.00    7    7 |    -513    -194      7    164
        |    0     0     0     8     8    13   .01           |     161     175
emr   79|   -6     4    -1    16   -15    -2  -.02   13   13 |  202539     400     12    133
        |    3     1     1    13    12    10   .02           |     739     318
esa  150|    0     0     0    -2     1    -7  -.04    8    8 |   -1540    1097      7    116
        |    0     0     1    12    13    10   .02           |     436     726
gfz  239|    0     0     3     5    -8    -1   .07   16   10 |      96     159     12    161
        |    1     0     1    11    11    15   .02           |     274     368
grg  120|    4     0     1     0     0    -9  -.07   13   11 |       7      61     11    208
        |    0     0     3     7     8    18   .02           |      89     146
igr  n/a|    0     0     0     7    -9   -20   .01    4    4 |    4841    1204     11    158
        |    0     0     0     8    11    12   .01           |    2730     379
jpl   80|    1    -1     0     0    -2   -26   .17    8    8 |   -2399     387      8    158
        |    1     2     0     9    11    10   .03           |     810     296
mit  361|    0     0    -2   -10    -1   -19  -.02    7    6 |    3953    1276     23    914
        |    0     0     0    12    13    51   .00           |    2810     381
ngs  212|    0     0    -1     2    15   -10  -.09    9    9 |    -550    -171    705   1731
        |    0     1     2    10    22    20   .02           |     178     233
sio  542|    0     0     0    -3    35    63  -.02    8    7 |     ---     ---    ---    ---
        |    0     0     2    24    45    47   .01           |     ---     ---


Table 1.2221.b   GPS week : 2221   MJD: 59791.000-59797.000   

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



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 2.2221.0   GPS week: 2221   Day: 0   MJD: 59791.000                            

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  684|    0     0     3    15   -14    10  -.01    7    7 |    -516    -237      7    151
emr   80|   -4     0    -2    11     4   -13   .01   12   12 |  201504     806     13    136
esa  150|    0     0    -2     1    -8    -8  -.04    8    8 |   -2121    1787      9    128
gfz  238|    0     0     5    -2    -9   -12   .09   10   10 |     -39     359     10    151
grg  121|    3     0     7     5    -1   -26  -.08   17   14 |    -122     197     14    213
igr  n/a|    0     0     0     1    12   -44   .02    4    4 |    1367    1256     12    161
jpl   80|    3    -5    -1   -11     0   -34   .22   10   10 |   -3590     900      9    184
mit  361|    0     2    -3   -12   -21    56  -.03    7    7 |     274    1403     36    872
ngs  214|    1     1     2     6     7   -38  -.10    9    9 |    -538    -255    592   1721
sio  549|    0     0    -3   -16    50     3  -.02    9    8 |     ---     ---    ---    ---

Table 2.2221.1   GPS week: 2221   Day: 1   MJD: 59792.000                            

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  679|    0     0     1    -1   -34    -8   .02    7    7 |    -761     156      6    141
emr   79|   -6     4    -3    18   -19     1  -.03   14   14 |  202071     402     13    137
esa  150|    0    -1    -1     4    -7    12  -.05    8    8 |   -1673    1562      7    131
gfz  241|   -1     0     4   -10   -22    10   .09   11   11 |      60     178     14    152
grg  120|    4     0    -1    -1    -8   -20  -.07   14   12 |    -100     259     12    219
igr  n/a|    0     0     1    16    -5   -16  -.01    4    4 |    2321    1222     12    124
jpl   80|    2     0     0    15     6   -18   .17    9    9 |   -2964     274      9    109
mit  361|    0     0    -2    16     7    35  -.02    7    6 |    1788    1205     20    647
ngs  217|    2    -1     2     8    32   -26  -.11   10   10 |    -879     312    543   1612
sio  543|    0     0     0   -38    35   -11  -.03    9    8 |     ---     ---    ---    ---

Table 2.2221.2   GPS week: 2221   Day: 2   MJD: 59793.000                            

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  681|    0     0     2    14   -35    19  -.00    7    7 |    -418    -221      8    176
emr   80|  -11     5    -1    44   -35    -6  -.00   15   15 |  202431    -148     12    140
esa  150|    0    -1    -1    10    -6    -8  -.04    8    8 |   -1554    1392      7    101
gfz  231|    0     0     4     3   -16     7   .07    9    8 |    -196     397     13    162
grg  123|    4     0     4    -6    -8    -7  -.07   12   10 |      56      75     12    209
igr  n/a|    0     0     1    20    -9    -7   .01    4    4 |    3454    1094     12    187
jpl   80|    1    -3     0     0     6   -42   .18    8    8 |   -2536      23      9    185
mit  361|    0     0    -3   -18   -14   -31  -.02    6    6 |    2586    1306     23   1068
ngs  213|    0     0    -2    13    19   -18  -.09   10   10 |    -526    -113    698   1602
sio  543|    0     0     0   -22    76    75  -.04    8    7 |     ---     ---    ---    ---

Table 2.2221.3   GPS week: 2221   Day: 3   MJD: 59794.000                            

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  680|    0     0     2    16   -16    -6  -.00    7    7 |    -684     -92      8    168
emr   80|   -8     5     0     3   -25   -14  -.00   14   14 |  202110     581     11    131
esa  150|    0    -1     0   -25   -11   -22  -.04    8    8 |   -1951    1720      7    109
gfz  242|    0     0     0     0   -16   -17   .08   17    9 |      61     430     14    170
grg  119|    4     0     3    -7    -1     2  -.06   12   11 |     -25     -63     12    200
igr  n/a|    0     0     0     3   -15   -25  -.01    4    4 |    4422    1628     11    159
jpl   80|    0    -1     0    -6   -18   -23   .14    8    8 |   -2828     578      8    154
mit  361|    0     0    -1   -13     0   -13  -.02    6    6 |    3429    1590     19   1092
ngs  210|    0     1    -2    -8    -3   -12  -.10    9    9 |    -666    -153    756   1718
sio  541|    0     0     0    31    80    96  -.02    8    7 |     ---     ---    ---    ---

Table 2.2221.4   GPS week: 2221   Day: 4   MJD: 59795.000                            

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  683|    0    -1     2    11   -31    20  -.02    7    7 |    -520    -327      8    178
emr   80|   -5     3    -1     7   -11     2   .00   13   13 |  202735     629     12    126
esa  150|    0     0     2    -4    25   -13  -.02    9    9 |    -870    -164      7    113
gfz  240|    0     0     3    22     8   -18   .05   21   11 |     633    -605     13    168
grg  119|    4     0    -4     4    -4    12  -.06   11   10 |      83    -169     10    195
igr  n/a|    0     0     2     3   -10   -21   .01    4    4 |    6009    1436     12    156
jpl   80|   -1     0     0     0     8   -22   .14    8    8 |   -1975     512      8    161
mit  361|    0     0    -1   -15    -3   -32  -.03    6    6 |    4611    1513     18    422
ngs  210|    0     0    -4     0    53     1  -.07    8    8 |    -504    -392    767   1671
sio  538|    0     0     1    -9   -28    76  -.02    8    8 |     ---     ---    ---    ---

Table 2.2221.5   GPS week: 2221   Day: 5   MJD: 59796.000                            

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  682|   -1     0     3    -2   -28    19  -.01    7    7 |    -377    -308      8    167
emr   80|   -4     4    -1    15    -6    -3  -.04   13   13 |  203299     369     12    127
esa  150|    0    -1    -1     6     0    -3  -.04    9    9 |   -1136     492      9    109
gfz  241|    0     0     2    15     3    -3   .09   20   11 |     246       2     11    157
grg  118|    5     0     0    -3     4   -34  -.11   14   10 |      58      33     11    216
igr  n/a|    0     0     0     7   -24   -16   .01    5    4 |    7509    1359     11    165
jpl   80|    0    -2     0    -8   -16   -27   .15    8    8 |   -1583     270      9    161
mit  361|    0     0    -2    -8     1   -84  -.02    8    7 |    6614    1455     24    783
ngs  214|    0     0    -1   -13   -13    23  -.08    9    8 |    -387    -290    816   1986
sio  538|    0     1     0    14    56   109  -.03    8    7 |     ---     ---    ---    ---

Table 2.2221.6   GPS week: 2221   Day: 6   MJD: 59797.000                            

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  680|   -1    -1     1     1   -20    23  -.01    7    7 |    -320    -329      7    168
emr   80|   -1     5     0    16   -12    17  -.06   13   13 |  203624     164     12    135
esa  150|    0     0     0    -7    15    -6  -.07    9    9 |   -1476     892      6    124
gfz  243|   -2     0     2     8    -8    20   .05   22   12 |     -92     353     14    170
grg  126|    4    -1     1    12    16     7  -.05   12   10 |     100      99     12    209
igr  n/a|    0     0     0    -1   -11   -10   .01    5    4 |    8808     435     11    156
jpl   80|    1     0     0     6    -6   -12   .17    8    8 |   -1322     154      7    157
mit  361|    0     0    -1   -23    18   -69  -.03    7    6 |    8371     462     24   1520
ngs  211|    0     0    -4     7    12    -4  -.06    8    8 |    -350    -312    767   1811
sio  543|    0    -1     4    13   -26    92  -.01    9    8 |     ---     ---    ---    ---

       
       
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 3.2221.0   GPS week: 2221   Day: 0   MJD: 59791.000                            

        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    9    9   11   14    3    9   10    9   10    3 |    24   27   25   23   23   24   28   25   24   25    24
   2  |    8   13    8    9   13    5   10    5    8    9    3 |    21   22   23   27   22   23   24   23   23   24    22
   3  |    6   11   10   10   19    3   10    7   10    7    3 |    28   28   28   30   31   26   26   28   26   26    26
   4  |   10   16   10   11   20    6   11    5    9    8    3 |    87   82   82   87   84   83   78   84   86   86    84
   5  |    4   14    7    6   11    3   10    5    7    5    2 |    29   28   25   29   27   26   30   27   29   25    26
   6  |    5    9    8    7    9    3    9    6    7    5    2 |    24   26   26   25   23   25   28   23   23   23    23
   7  |    6    8    6   11   12    4    8    4    5    9    2 |    43   49   47   46   43   48   50   47   49   48    46
   8E |    7   13   10   19   47    6   18    7   14   16    5 |    37   39   38   51   52   40   40   35   47   40    37
   9  |    6    8    6    8   18    4   10    8    6    8    2 |    28   32   31   30   29   29   27   30   30   28    28
  10  |    6   11    8    7   17    4   10    6    8    7    3 |    29   28   28   29   29   28   30   29   28   29    28
  11  |    7   17   10    9   10    4    9    6    6    7    3 |    19   26   23   26   23   22   24   23   21   24    21
  12  |    5   21    7    8   11    4    8    7    6    7    3 |    41   51   43   41   39   41   47   44   40   40    42
  13  |    6   11    5    7   13    3    7    7    7    5    2 |    26   29   29   28   27   27   32   31   27   26    27
  14  |    8   10    7    7   12    2    8    6    6   12    3 |    54   48   49   56   57   53   54   50   54   53    52
  15  |    5   14    7   14   13    3    8    8    6    5    3 |    56   57   56   60   61   57   58   54   60   56    57
  16  |    6   18    6    8   14    4    9    7    8    7    3 |    19   21   22   24   21   21   24   24   21   21    21
  17E |    6   10   10    7   15    3    8    6    8    9    3 |    35   36   34   37   37   35   34   35   37   36    35
  18  |    8   12   11    7   11    4   10    8   10    7    3 |    23   27   27   26   27   26   32   26   24   27    25
  19E |    4   11   10    7   29    3    9    5    9    8    3 |    35   37   36   33   44   36   35   34   38   38    35
  20  |    8   17    8    9   13    4   10    5   10    8    3 |    29   28   26   31   27   26   28   29   26   27    27
  21  |    6    9    7   10   18    4   11    6   16   11    3 |    23   25   23   24   25   23   28   23   25   24    23
  22  |    8   11    5   11   16    4    9    7    7    8    3 |    24   23   25   26   27   25   26   26   24   26    24
  23  |    9   14   12    9   14    6   11    8   11    9    3 |    64   60   59   64   66   62   63   63   66   62    62
  24  |    8   13   11   13   20    5   13    9   12    8    4 |    85   89   84   87   77   87   91   87   92   86    86
  25  |    5   10    7    8   12    2    9    5    7    6    2 |    21   27   24   24   22   22   27   23   19   21    22
  26  |    9    8   11    9   10    4    8    8    9   13    3 |    20   26   22   22   19   21   27   22   17   21    20
  27E |    8   11   11   25   28    7    9   11    9   12    4 |   126  128  129  129  137  128   96  135  124  129   129
 X28  |    7   11    6   14   13    4    9    7   10  ---    3 |    27   30   25   31   28   30   31   30   28  ---    27
  29E |    6   15   10    9   13    2    7    7    6    7    3 |    49   47   48   48   47   48   52   47   49   48    48
  30  |    6   11    6    7    9    3   11    6    5   10    2 |    18   29   20   21   17   20   28   20   18   21    20
  31  |    6    8    7    7    8    4    7    5    9    8    2 |    50   53   53   50   49   52   54   50   47   47    50
  32  |    7   11    8   10   17    4    9    6    5   10    3 |    30   31   32   31   30   30   35   34   30   34    31
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   12    8   10   17    4   10    7    9    9      |T   38   40   38   40   39   38   40   39   39   39    38
 WRMS |    7   12    8   10   14    4   10    7    9    8      |NE  34   36   34   36   34   34   37   35   34   34    34
 MEDI |    6   11    8    9   13    4    9    6    8    8      |MD  29   29   28   30   29   28   31   30   28   28    27

Table 3.2221.1   GPS week: 2221   Day: 1   MJD: 59792.000                            

        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    9    7   10   12    4    8    8    8   10    3 |    27   30   29   29   29   28   32   30   30   30    28
   2  |    6   16    6    8   10    4    7    6    9    9    3 |    23   29   24   29   25   24   25   27   23   27    24
   3  |    7   10    9    9   20    4   10    7   11    6    3 |    35   37   36   34   38   34   38   37   37   34    35
   4  |   10   19    9   10   21    3   10    4   10    7    3 |    74   71   74   77   74   74   73   74   73   71    73
   5  |    5   10    5    8   10    3   10    5    7    6    2 |    34   37   35   39   33   36   37   35   36   36    35
   6  |    5   10    8    9    9    4    7    6   10    6    2 |    28   31   29   29   27   28   30   27   29   27    27
   7  |    5   10    4    9    8    3    8    4    9    4    2 |    28   34   28   27   25   28   34   30   30   28    28
   8E |    7   18   10   29   22    8   14    7   21   10    5 |    34   42   39   48   37   35   36   37   34   35    35
   9  |    6   11    7    8   18    4   10    7    8    7    3 |    40   41   42   41   41   39   40   41   39   39    39
  10  |    7   10    7    7   12    4    8    8   10   10    3 |    34   31   35   36   35   34   35   37   33   36    34
  11  |    7   17    9   11   10    4    9    6   10    9    3 |    23   30   25   29   26   24   27   26   23   27    24
  12  |    6   20    7   10    7    4    8    7    9   10    3 |    44   48   45   46   43   44   46   47   43   46    44
  13  |    5   10    4   14   11    3    8    7    8    6    2 |    38   41   38   41   38   40   40   41   41   41    39
  14  |    9   12    7   10    9    3    9    7    6   13    3 |    41   40   41   45   43   42   41   43   42   45    41
  15  |    5   16    8   14   10    4    9    8    8   10    3 |    48   48   49   53   52   49   50   46   48   48    48
  16  |    8   22    7    9   13    5   10   10    7   12    3 |    26   25   31   32   27   29   31   30   26   30    28
  17E |    6   18    8   13   11    5   13    6    9   11    3 |    18   24   16   18   17   18   20   19   22   18    17
  18  |    9   12   11    8   12    3    9    6   12    6    3 |    25   29   29   30   30   26   31   28   24   29    27
  19E |    6   15   10   11   26    5    8    7   12   11    4 |    15   21   18   18   26   17   18   19   20   17    16
  20  |    8   15    6    8    9    4    7    5   10   10    3 |    37   37   36   40   36   37   37   38   35   39    37
  21  |    6   13    5   10   17    4   10    5   10   10    3 |    24   26   27   33   31   27   29   27   26   30    26
  22  |    7   10    5    8   16    5    8    5   10    8    3 |    35   35   38   37   39   37   37   39   35   36    36
  23  |   10   15   13   14   12    5   10    7   14    7    4 |    46   46   45   49   50   45   46   48   50   48    46
  24  |    8   12    8    8    7    3    9    6    8    9    3 |    38   45   41   38   39   39   44   38   36   38    39
  25  |    7   11    7    8    7    2    9    6    9    9    3 |    33   38   38   36   34   34   37   37   32   35    35
  26  |    9    9    8    8   10    5    9    7   11   12    3 |    31   33   36   34   31   33   35   33   32   36    32
  27E |   10   12   12   21   26    7   13   13   12   15    5 |    94   95  103   93  103   97  115   99   90   98    96
 X28  |    9   15    4   10    9    5    7    6   11  ---    3 |    32   36   30   34   30   32   32   32   33  ---    31
  29E |    5   15   10   11   11    3    8    7   10    9    3 |    17   17   17   19   16   16   20   19   18   22    17
  30  |    5   11    5    9    7    3    9    7    8    7    2 |    32   38   32   32   28   33   37   33   29   33    32
  31  |    6    9    6    6    7    4    6    6    7    8    2 |    41   42   42   42   39   41   43   42   39   39    41
  32  |    7   12    7    7   15    4    9    9   12   10    3 |    42   43   46   46   42   44   45   48   42   44    44
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   14    8   11   14    4    9    7   10    9      |T   35   38   37   38   37   36   38   37   35   37    36
 WRMS |    7   14    8   11   12    4    9    6   10    8      |NE  35   37   36   37   35   35   37   37   35   36    35
 MEDI |    7   12    7    9   11    4    9    7   10    9      |MD  34   37   36   36   34   34   37   37   33   36    35

Table 3.2221.2   GPS week: 2221   Day: 2   MJD: 59793.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   13    7   10   10    4    7    9   12    7    3 |    19   26   20   20   20   19   22   20   19   21    19
   2  |    5   15    8   10    9    6    8    5   11    8    3 |    18   23   18   20   17   18   19   20   19   21    18
   3  |    6   13    7   10   17    4    9    5   13    4    3 |    25   28   29   27   32   25   25   25   27   25    25
   4  |   10   24   11   10   20    5   11    5   14    8    4 |    59   58   59   61   67   59   59   59   56   61    59
   5  |    4   12    5    6    9    3    8    6   10    6    2 |    26   27   23   28   27   24   28   25   27   26    25
   6  |    4   11    8   10    9    3    8    5    9    4    2 |    18   24   20   17   19   18   24   18   18   17    18
   7  |    5   11    5    6    9    5    5    4    8    8    2 |    29   37   32   32   26   32   35   30   36   29    31
  X8E |    8   14   15   46   27    8  ---   13   16   14    8 |    32   35   29   53   44   32  ---   30   32   31    32
   9  |    4   13    8   10   17    3    8    6    6    7    3 |    26   29   27   26   30   26   26   25   27   25    25
  10  |    6   12    7    6   14    3    9    5    9    9    3 |    24   26   25   25   23   25   24   25   25   29    24
  11  |    7   18   11   11    8    4    8    5   11    8    3 |    10   21   13   17   16   11   15   13   10   15    12
  12  |    5   20    7    6    8    4    9    6    7    7    2 |    33   41   33   34   30   33   36   34   32   33    33
  13  |    7   15    6   16   11    4    9    6    7    9    3 |    21   24   22   24   21   21   26   23   23   21    21
  14  |    7   11    8    9    9    3    7    5    9    9    2 |    37   38   36   42   41   38   37   37   39   39    37
  15  |    7   16    8    8   15    3    8    8    7    4    3 |    50   54   51   50   55   50   51   48   53   50    50
  16  |    9   20    6    9   12    4    7    8   10   10    3 |    18   23   21   25   19   22   24   21   23   24    20
  17E |    8   16    8    9   12    3    9    7    6    7    3 |    24   27   20   23   25   21   22   23   24   21    22
  18  |    9   17    9    7    9    4    9    5   13    7    3 |     9   22   13   16   16   12   20   13   14   16    12
  19E |    6   17    9    7   11    3    7    8   10    8    3 |    26   30   26   24   25   26   28   29   26   27    26
  20  |    7   14    5    6    9    5    8    6   13   12    3 |    19   21   18   21   21   19   21   19   18   23    19
  21  |    7   14    6   11   15    3    9    6   15    9    3 |    18   23   17   21   18   17   20   18   20   22    17
  22  |    7   12    6   13   15    3    7    5    7    8    3 |    24   22   24   20   22   22   20   26   25   26    22
  23  |    9   16   12   10   10    5   10    5   12    6    3 |    45   46   43   49   46   43   44   48   49   45    45
  24  |    7   10    8    8    7    3    9    6    7    7    2 |    26   32   27   23   22   24   32   24   23   22    25
  25  |    6   12    7    8    7    3    9    6    6    6    2 |    21   30   25   20   21   22   25   22   19   20    21
  26  |    9   10    8    8    9    3    7    6    8    9    3 |    19   25   21   21   18   21   25   21   20   23    20
 X27E |   22   27   16   13   27   11  ---   11   21   15    7 |   118  123  127  122  131  125  ---  123  128  120   122
 X28  |    7   16    5   12    8    7    7    5   12  ---    3 |    22   31   23   26   24   24   26   24   26  ---    23
  29E |    5   21   10    7   14    3    8    8   10    9    3 |    30   33   30   28   28   27   30   30   28   30    28
  30  |    5   11    7    5    7    4    9    5    5   10    2 |    18   27   18   18   15   20   27   17   19   18    18
  31  |    7    9    7    8    7    4    7    5    9    7    2 |    36   37   38   36   34   37   39   36   33   34    36
  32  |    7   14    7   10   13    3   10    8    7    8    3 |    27   27   28   28   25   26   26   29   27   27    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   15    8    9   12    4    8    6   10    8      |T   28   33   29   31   30   29   28   29   30   30    29
 WRMS |    7   15    8    8   10    4    8    6   10    7      |NE  24   29   25   26   25   25   27   25   25   26    25
 MEDI |    7   14    7    9   10    4    8    6    9    8      |MD  24   27   25   25   24   24   26   25   25   25    24

Table 3.2221.3   GPS week: 2221   Day: 3   MJD: 59794.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6   12    8   12   11    5    5    9   12    8    3 |    21   25   23   24   24   21   25   23   21   21    21
   2  |    5   16    7    8   10    5    7    7    7    6    2 |    16   25   20   20   20   17   19   21   18   21    18
   3  |    7   15    7   10   15    5    8    6   11    7    3 |    24   28   24   24   32   23   23   25   23   25    23
   4  |    9   21   10   13   21    4    9    6   13    7    4 |    52   43   45   46   60   47   47   50   50   50    48
   5  |    4   15    6    9    9    5    6    5    5    5    2 |    24   26   21   26   25   23   27   24   22   23    23
   6  |    7   12    8    8   10    3    4    5   10    4    2 |    22   25   25   22   23   21   24   21   20   21    21
   7  |    5    8    7    7    8    3    5    4   11    6    2 |    35   41   40   38   36   38   41   37   39   35    37
   8E |    6   15   11   82   16    6   11    6   12   13    4 |    29   34   27   70   34   28   35   31   32   35    30
   9  |    6    9    7    7   19    3    8    6    9    6    3 |    22   22   24   20   30   22   23   22   21   20    21
  10  |    6    9    8    8   14    4    9    6    6    8    3 |    24   23   23   24   24   23   24   23   22   24    22
  11  |    8   20   14    8    8    4    7    6   10    8    3 |    12   24   18   17   20   14   16   18   14   18    15
  12  |    6   20    6    9   10    4    7    7    6    9    3 |    34   41   32   36   30   32   36   35   33   33    34
  13  |    6   13    7   10   12    6    7    6    7    7    2 |    20   23   21   20   21   20   26   24   23   23    22
  14  |    6   11    8    7    8    4    8    4   13   11    3 |    39   37   36   41   42   38   39   38   41   38    38
  15  |    5   15    9    7   10    4    7    7    8    3    2 |    74   73   74   71   75   73   74   71   70   73    72
  16  |    9   21    6    8   13    7    8    7    6   11    3 |    21   22   21   24   20   21   21   23   22   24    21
  17E |    7   15    7    8   13    3   10    8    8    9    3 |    23   29   23   24   30   23   24   27   23   26    24
  18  |    9   14    9    9   10    5    9    5   12    6    3 |    13   24   16   18   19   15   22   19   17   17    16
  19E |    6   15    8    9   13    4    7    5   12    7    3 |    21   27   24   25   28   23   24   24   25   22    23
  20  |    5   12    6    7    9    6    6    8   10    7    2 |    17   20   17   19   22   18   20   19   19   19    18
  21  |    8   13    8   13   16    5    7    8   10   10    3 |    19   21   19   23   23   19   22   20   21   20    19
  22  |    7   12    7   10   15    4    8    5    4    8    3 |    21   22   22   23   23   20   20   24   24   23    21
  23  |    8   16   13   14   13    6   11    4    9    6    3 |    47   45   44   53   49   44   47   48   54   47    47
  24  |    6   11    7    7    8    4    9    7    7    7    2 |    29   35   30   29   28   30   36   30   32   27    30
  25  |    7   10    7    9    8    3    7    5    8    8    2 |    20   26   24   22   22   21   25   22   22   21    22
  26  |    8   11    9    8   10    5    9    7    8    9    3 |    19   23   20   19   17   19   25   20   18   20    19
 X27E |   25   23   15   10   29    9  ---   10   25   17    7 |    81   91   91   88   78   88  ---   88   93   78    84
 X28  |    6   13    7   12    9    5   10    7   16  ---    3 |    26   30   24   28   28   25   28   26   29  ---    25
  29E |    6   18   10    9   21    4    7    6    7    9    3 |    30   29   26   24   23   25   28   26   29   30    26
  30  |    5   10    7    6    7    3    8    5    8    6    2 |    17   26   20   20   17   20   27   16   16   17    18
  31  |    5    8    8   10    7    5    6    4    4    9    2 |    38   39   40   43   36   41   42   38   40   36    39
  32  |    6   13    7    9   14    4    8    6    5    8    3 |    25   28   26   29   25   24   25   26   27   26    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   14    8   17   12    4    8    6    9    8      |T   28   32   29   31   30   28   29   29   30   29    28
 WRMS |    7   14    8    9   11    4    8    6    9    7      |NE  25   28   25   27   27   25   28   26   26   25    25
 MEDI |    6   13    7    9   10    4    8    6    8    8      |MD  23   26   24   24   25   23   25   24   23   24    23

Table 3.2221.4   GPS week: 2221   Day: 4   MJD: 59795.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8    8    8   13    9    3    7    8    7    8    3 |    29   28   27   30   29   27   31   27   29   29    28
   2  |    4   12    6   10    8    3    7    5    6    8    2 |    25   28   27   29   26   26   26   27   28   29    26
   3  |    7    9    9    9   15    4    9    6    7    7    3 |    32   28   29   33   36   30   31   30   28   31    30
   4  |    9   20   11   13   21    4   10    7    9    9    4 |    59   56   58   57   60   57   59   60   60   61    58
   5  |    4   11    7    9    8    3    7    7    5    4    2 |    31   31   30   33   30   32   32   31   31   32    31
   6  |    6   11    8    9    8    3    6    6    8    5    2 |    30   30   30   29   31   30   32   30   31   31    30
   7  |    6    9    9   12    8    5    8    6    9    9    3 |    35   39   37   40   34   36   39   35   39   36    36
   8E |    7   10   16  100   14    4   10    6   10   11    4 |    24   28   31   76   29   26   26   24   28   28    25
   9  |    7   11    9   11   19    3    7    6    7    7    3 |    32   30   31   30   36   30   32   30   30   30    30
  10  |    6   10    8    8   10    3    9    6    7    9    3 |    31   32   32   34   30   32   33   30   30   35    31
  11  |    6   15   14    9    8    4    8    7    9    7    3 |    27   30   28   31   30   28   29   28   29   29    28
  12  |    5   19    6   10    8    5    7    6    7    9    3 |    46   51   44   47   45   46   45   45   48   46    46
  13  |    6   10    7   11   10    4    9    6   10    6    3 |    35   40   39   39   37   37   38   40   40   38    38
  14  |    6   11    8    8    8    3    8    5   11    8    2 |    49   44   49   49   50   50   49   50   52   50    49
  15E |    5   14   10   11    8    6    9    8    8    5    3 |    58   57   58   60   55   59   56   54   57   59    56
  16  |    8   21    5   13   10    4    8    7    7   10    3 |    27   29   30   33   27   30   31   30   30   31    29
  17E |    8   14    8    7   15    3    8    5   12    8    3 |    22   23   20   21   26   20   22   22   26   22    21
  18  |    9   12   11   12    8    4    9    5   11    8    3 |    28   33   32   34   30   30   32   29   33   29    30
  19E |    6   14   10   12   11    3    6    8   12    7    3 |    17   18   17   18   18   16   16   19   23   19    17
  20  |    6   12    7    6    8    4    7    7    7   10    2 |    33   33   34   36   34   34   34   35   37   36    34
  21  |    8   11    7   11   15    3    8    7    9   13    3 |    26   24   22   25   29   23   25   23   23   27    23
  22  |    8   10    6   10   13    4    8    5    6    9    3 |    34   37   36   35   38   34   34   37   37   36    35
  23  |    9   16   12   13   11    4    9    5   11    7    3 |    50   47   48   55   54   48   49   52   53   51    50
  24  |    5   11    8    8    4    3   10    6    9    8    2 |    28   35   32   29   28   28   33   28   27   28    29
  25  |    6   10    6    8    6    3    7    4    7    9    2 |    35   40   38   38   34   37   39   37   36   36    36
  26  |    8    8    8   11    9    3    6    6    6    9    3 |    30   32   32   32   29   31   34   32   33   33    31
 X27E |    9   11    9   26   11    7  ---    5   13   14    4 |   128  122  132  122  124  126  ---  127  127  123   126
 X28  |    8   12    6   14    7    6    8    6   15  ---    3 |    31   36   29   33   31   31   33   33   33  ---    31
  29E |    5   18    9    9    8    4    8    7    7    8    3 |    19   21   18   17   20   18   21   21   22   21    19
  30  |    5   10    9    7    5    3    9    5    7    6    2 |    30   35   29   31   28   32   37   30   33   31    31
  31  |    5    7    7    7    7    4    6    5    6    9    2 |    38   40   39   37   39   38   40   37   41   38    38
  32  |    5   11    6    9   13    4   10    9    6    7    3 |    37   37   39   37   37   36   38   38   36   36    36
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   13    9   21   11    4    8    6    8    8      |T   36   37   36   39   37   36   34   36   37   37    36
 WRMS |    7   13    9   11   10    4    8    6    8    8      |NE  34   35   34   36   35   34   35   34   35   35    34
 MEDI |    6   11    8   10    8    4    8    6    7    8      |MD  31   33   32   33   31   31   33   30   33   32    31

Table 3.2221.5   GPS week: 2221   Day: 5   MJD: 59796.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    9   10    8    9   10    4    5    9    8    8    3 |    29   29   29   31   29   29   30   28   29   30    29
   2  |    4   21    8   12    9    5    7    7   10    8    3 |    22   29   26   24   22   23   26   24   27   25    24
   3  |    8    9    9   14   14    4    9    7    8    9    3 |    35   31   33   36   36   33   34   32   31   31    32
   4  |   10   18   11   11   20    5    9    7   10    8    4 |    67   66   64   65   65   66   65   67   66   66    65
   5  |    5   15    8    8   10    5    8    9    6    4    2 |    27   30   26   28   28   28   30   27   30   28    27
   6  |    4   10   10   10    9    3    7    8    8    6    2 |    23   25   25   23   23   22   27   22   23   22    23
   7  |    5    7   10    7    7    4    7    5    4    6    2 |    28   29   29   29   27   27   29   26   30   27    28
   8E |    7   10    9   98   19    4    8   10    8   10    3 |    45   46   45   85   47   45   44   45   42   47    45
   9  |    5    8   10    9   18    4    9    8    7    7    3 |    29   29   28   28   31   27   28   28   27   26    27
  10  |    5    8    8    8   12    3    9    8    8    7    2 |    25   27   27   29   24   27   29   24   28   25    26
  11  |    7   18   14    8    8    5    8    8   11    9    3 |    16   25   20   19   21   17   21   20   18   22    18
  12  |    4   18    6    8    8    4    9    9    7    8    3 |    27   30   25   26   24   26   28   28   26   27    26
  13  |    7   13    8    8   11    5    7    6    8    5    2 |    17   22   18   20   20   18   25   20   18   18    18
  14  |    7   11    9    8    8    4    7    7    6    6    2 |    27   25   27   30   30   27   30   29   28   28    27
  15E |    6   13    9    8    9    5    9    7    6    4    2 |    67   67   69   70   68   69   68   65   69   69    67
  16  |    6   19    9    7    9    6    6    9   10   11    3 |    23   24   26   24   22   25   26   25   26   25    24
  17E |    6   14    9    9   25    4    7    9   18    7    4 |    28   32   23   25   34   25   28   26   32   29    27
  18  |    9   13   10    7    9    5    9    7    8   10    3 |    15   23   19   21   19   18   25   19   22   20    19
  19E |    7   15   10    9   16    4    6    8   14    9    3 |    31   32   29   30   32   30   30   29   36   35    31
  20  |    5   13    8    8   10    5    6    8    9    8    3 |    22   22   21   22   24   20   22   22   21   23    21
  21  |    8   14    7    9   34    4    8    9    6    9    4 |    29   29   26   26   42   28   30   26   28   29    27
  22  |    8   10    5   13   16    4    9    6    8   10    3 |    18   18   19   21   24   19   18   21   21   21    18
  23  |    8   13   11   11   13    6   10    8    8    7    3 |    44   45   46   51   48   46   47   49   48   48    47
  24  |    6   10    8   10    7    5    8    6    8    6    2 |    26   30   28   24   25   26   32   25   27   26    26
  25  |    8   11    7    7    7    2    8    7    8    6    2 |    20   28   24   24   20   22   26   23   21   22    22
  26  |    7    7    8   10    7    4    7    8    6    7    2 |    24   26   26   22   21   24   29   25   27   25    24
  27E |    7   13   12   29   17    8   11    7   13   12    5 |    86   88   92   81   84   86   96   87   86   85    86
 X28  |    7   13    9   22    8    6    9    8    9  ---    4 |    26   32   24   33   27   27   31   25   28  ---    26
  29E |    4   16   11   10   16    5    6    9    8    9    3 |    47   48   50   49   43   48   48   44   50   47    47
  30  |    6   10   12    6    5    4    8    7    6    5    2 |    20   26   20   23   18   21   27   18   20   19    20
  31  |    6    9    6   10    7    5    7    6    6    8    2 |    28   29   28   29   28   29   30   28   30   27    28
  32  |    6   10    6    7   14    4    7    8    7    9    3 |    29   29   31   29   30   29   30   29   29   27    29
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   13    9   20   14    5    8    8    9    8      |T   31   33   31   33   32   31   34   31   32   32    31
 WRMS |    7   13    9   11   10    4    8    7    8    7      |NE  26   29   27   28   28   27   29   27   28   27    26
 MEDI |    6   13    9    9   10    4    8    8    8    8      |MD  27   29   26   28   27   27   29   26   28   27    27

Table 3.2221.6   GPS week: 2221   Day: 6   MJD: 59797.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7   10    7   12    8    4    6    8    9    7    3 |    23   23   24   28   24   23   26   22   21   22    22
   2  |    8   15    6    9   10    6    9    6    5   10    3 |    17   21   21   21   20   19   21   21   21   23    19
   3  |    7   13    7    9   12    4    7    7    7    7    3 |    42   42   43   43   42   42   40   43   40   42    41
   4  |   11   22   12   12   20    6   10    6    9   10    4 |   101   98   99  103   98  101   97  101  100  101   100
   5  |    5   11    6   10    8    4    6    7    5    5    2 |    36   37   37   37   37   36   40   38   38   38    37
   6  |    7   12    8    8   10    3    7    6    7    6    2 |    26   28   26   25   28   25   29   25   25   24    25
   7  |    6    8    9   10    5    4    7    6    6    6    2 |    42   45   45   44   42   44   48   42   44   43    44
   8E |    9   11    9  104   12    5    7    6    7   12    3 |    41   43   41   85   39   40   37   39   40   41    40
   9  |    7    9    9   13   20    4    8    6    8   10    3 |    49   49   50   49   50   49   48   48   49   46    48
  10  |    6    9    8    6   10    4    7    7    5    8    2 |    32   32   32   33   34   33   33   34   32   36    33
  11  |    9   17   13   10    8    5    8    7    9    9    3 |    15   22   19   20   22   15   20   19   16   19    17
  12  |    7   18    8    8    8    5    6    7    6    9    3 |    54   58   53   48   50   52   55   55   53   51    53
  13  |    4   15    7    9   11    5    7    5    5    6    2 |    40   41   43   44   43   42   44   45   43   43    43
  14  |    6    9    8   11    8    4    8    6    6    6    2 |    56   52   53   59   58   55   54   55   56   58    55
  15E |    5   13    8   12    8    5    8    7    7    6    2 |    58   59   61   60   61   61   60   58   59   61    59
  16  |    7   19    6    8    9    5    7    7    8   12    3 |    27   24   29   33   27   30   30   29   31   28    28
  17E |    9   10    9   10   27    5    7    8    9    9    4 |    29   29   25   28   37   26   28   27   30   26    27
  18  |    8   13   12    7   10    5    9    6   10    7    3 |    12   19   16   16   21   15   22   17   15   18    16
  19E |    8   13   10    7   16    4    8    5    7    7    3 |    21   25   24   19   27   22   24   23   24   24    22
  20  |    7   12    7    8    8    6    8    7    6    7    2 |    36   33   36   37   37   34   36   39   37   38    36
  21  |    9   12    8   15   13    3    7    7   10    8    3 |    21   22   21   23   23   21   23   20   23   23    20
  22  |    6   11    6   15   14    3    8    6    6    9    3 |    32   32   30   32   36   32   32   36   32   33    32
  23  |    8   12   11   11   12    6   10    9    8    7    3 |    74   69   69   74   75   71   71   77   75   72    73
  24  |    5    9    8    8    7    4    9    6    7    8    2 |    36   38   39   34   36   35   42   36   36   36    37
  25  |    7    9    7    8    7    4    7    4    6    7    2 |    31   35   36   31   31   32   33   34   32   33    33
  26  |    8    7    7   10    8    5    7    8    7   10    2 |    30   31   33   32   29   32   33   32   32   31    31
  27E |    8   10   13   32   12    6    9    9    9   15    5 |   144  142  150  141  143  145  112  143  147  142   144
 X28  |    6   11    5   14    9    6    7    6    8  ---    3 |    39   40   38   42   39   40   40   40   39  ---    39
  29E |    6   16   10    9   13    4    9    7    9   12    3 |    39   39   38   37   36   37   39   38   40   40    38
  30  |    6   10    8    7    4    5    8    5    8    7    2 |    29   35   30   31   27   30   34   29   27   28    29
  31  |    5    8    6    8    7    2    5    5    7    6    2 |    56   56   55   55   55   56   56   56   55   53    55
  32  |    7   11    7    9   12    4    7    7    7   10    3 |    48   47   49   47   46   47   46   50   48   47    47
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   13    9   22   12    5    8    7    8    9      |T   41   42   42   44   42   41   42   42   42   42    41
 WRMS |    7   13    9   12   10    4    8    6    8    8      |NE  38   39   39   40   39   38   40   40   39   39    38
 MEDI |    7   11    8    9   10    4    7    6    7    8      |MD  36   37   37   37   37   35   37   38   37   38    37



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 4.2221   GPS week: 2221   MJD: 59791.0-59797.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |U   11    12    29 |U    9     9    33 |U    9    10    25 |
emr | emr 3072 |U   17    14    31 |U   12    17    49 |U   16    15    41 |
esa | esa 3072 |    15    16    30 |U    9    13    40 |    13    14    33 |
gfz | gfz 3071 |U    9    13    29 |U    8    11    34 |U   10    10    26 |
grg | grg 3069 |U   15    29    45 |U    8    13    47 |    12    10    31 |
igr | igr 3067 |    11    12    26 |     8    10    31 |    10    11    27 |
igs | igs 3044 |    10    12    27 |     8    11    33 |    10    10    26 |
jpl | jpl 3017 |    12    12    35 |U   11    15    39 |    14    16    39 |
mit | mit 3072 |U   10    13    29 |U    9    11    38 |U   10    10    25 |



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 5.2221.0   GPS week: 2221   Day: 0   MJD: 59791.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9    11    29 |     9     9    45 |    11    10    27 |
emr | emr 3072 |    14    11    29 |    13    17    45 |    16    17    48 |
esa | esa 3072 |    11    17    30 |     9    13    46 |    13    17    37 |
gfz | gfz 3072 |     9    13    27 |     6     8    38 |    14    11    29 |
grg | grg 3069 |     9    14    28 |     8    10    58 |    13    12    40 |
igr | igr 3072 |    11    11    28 |     8    10    43 |    12    13    33 |
igs | igs 3072 |     8    11    27 |     8    10    43 |    12    10    29 |
jpl | jpl 3072 |    12    12    36 |    10    15    46 |    16    14    41 |
mit | mit 3072 |     8    12    32 |     9    10    50 |    12    11    29 |

Table 5.2221.1   GPS week: 2221   Day: 1   MJD: 59792.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    10    13    28 |     8     8    32 |     9    10    32 |
emr | emr 3072 |    20    13    31 |    12    17    47 |    19    14    57 |
esa | esa 3072 |    15    16    29 |     9    11    40 |    15    14    47 |
gfz | gfz 3072 |     9    13    26 |     7     8    31 |    10    10    31 |
grg | grg 3069 |    16    45    53 |     7    10    43 |    11     9    31 |
igr | igr 3069 |    11    12    25 |     7    10    28 |    12    11    35 |
igs | igs 2976 |     9    12    28 |     8    13    33 |    12    12    39 |
jpl | jpl 3072 |    15    11    33 |    11    17    37 |    17    14    52 |
mit | mit 3072 |     9    14    32 |     7    10    38 |    11     9    28 |

Table 5.2221.2   GPS week: 2221   Day: 2   MJD: 59793.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     8    12    27 |  ----  ----  ---- |    11     8    21 |
emr | emr 3072 |    20    18    35 |  ----  ----  ---- |    16    14    38 |
esa | esa 3072 |    14    14    28 |  ----  ----  ---- |    13    14    34 |
gfz | gfz 3072 |     8    11    27 |  ----  ----  ---- |    10    10    22 |
grg | grg 3069 |    16    35    54 |  ----  ----  ---- |    13     9    29 |
igr | igr 3072 |     9    11    24 |  ----  ----  ---- |    11    10    24 |
igs | igs 3069 |     8    11    25 |  ----  ----  ---- |    10     9    23 |
jpl | jpl 2880 |     9    11    38 |  ----  ----  ---- |    15    33    49 |
mit | mit 3072 |     8    12    25 |  ----  ----  ---- |    12    10    27 |

Table 5.2221.3   GPS week: 2221   Day: 3   MJD: 59794.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    12    12    30 |     9    12    32 |    10    11    26 |
emr | emr 3072 |    18    13    34 |    16    23    59 |    17    16    41 |
esa | esa 3072 |    17    16    29 |    14    21    40 |    13    16    28 |
gfz | gfz 3070 |    10    14    29 |    12    15    40 |    10    11    26 |
grg | grg 3069 |    19    41    56 |    13    19    55 |    12    12    34 |
igr | igr 3049 |    12    12    26 |     8    11    30 |    12    12    26 |
igs | igs 2976 |    10    12    26 |     9    14    31 |    11    10    25 |
jpl | jpl 2976 |    12    13    36 |    11    21    38 |    14    12    35 |
mit | mit 3072 |    11    14    27 |    12    16    39 |    10    10    25 |

Table 5.2221.4   GPS week: 2221   Day: 4   MJD: 59795.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    14    13    30 |     8     9    32 |     8    11    22 |
emr | emr 3072 |    19    19    29 |    11    14    42 |    13    15    32 |
esa | esa 3072 |    18    18    31 |     7    11    41 |    10    14    27 |
gfz | gfz 3070 |    12    14    31 |     7    11    36 |     9     9    20 |
grg | grg 3070 |    21    35    57 |     6    11    46 |    14     9    29 |
igr | igr 3072 |    14    14    28 |     8     9    32 |     8    10    22 |
igs | igs 3072 |    14    13    28 |     8    10    34 |     8    11    20 |
jpl | jpl 2976 |    14    13    34 |    11    13    46 |    10    13    31 |
mit | mit 3072 |    13    14    31 |     8     9    38 |     9    10    20 |

Table 5.2221.5   GPS week: 2221   Day: 5   MJD: 59796.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    12    15    34 |     9     9    24 |     8     9    20 |
emr | emr 3072 |    15    13    33 |    10    13    41 |    13    14    30 |
esa | esa 3072 |    16    18    35 |     8    13    32 |    11    13    29 |
gfz | gfz 3070 |    10    14    35 |     6    13    28 |     9    11    23 |
grg | grg 3069 |    12    19    35 |     7    14    37 |    11     8    26 |
igr | igr 3065 |    13    15    32 |     8    11    23 |     9    11    22 |
igs | igs 3072 |    11    15    32 |     7    10    24 |     9     9    22 |
jpl | jpl 3072 |    14    15    37 |    10    14    29 |    11    13    35 |
mit | mit 3072 |    10    16    32 |     9    11    30 |     8     8    20 |

Table 5.2221.6   GPS week: 2221   Day: 6   MJD: 59797.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    11    11    27 |    11     7    30 |     9     9    27 |
emr | emr 3072 |    12    12    28 |    10    15    62 |    18    13    44 |
esa | esa 3072 |    14    12    26 |     8    11    39 |    12    14    30 |
gfz | gfz 3072 |     8    10    25 |     8    12    34 |    10    10    29 |
grg | grg 3071 |    11    14    31 |     8    13    46 |    12     9    30 |
igr | igr 3072 |    11    11    23 |     9    10    31 |    10    10    25 |
igs | igs 3072 |    10    10    24 |     9    10    32 |    10     9    26 |
jpl | jpl 3072 |    12    10    28 |    11    10    37 |    13    13    32 |
mit | mit 3072 |     9    12    25 |     9    10    33 |    10     9    25 |


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 6.2221   GPS week: 2221   MJD: 59791.500-59797.500

                                                         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     -12      75     -89      0 |       8     21
            |      10      15      45      48      4 |       2
emr   uuuuu |     -29      -6    -142      78     -2 |       5     20
            |      44      24     111     102      3 |       3
esa   uuuuu |      18       1     -25     158     -2 |      18     26
            |      14      11      82      30      3 |       2
gfz   uuuuu |      16     -22     128      25      1 |      26     31
            |      15      29     115     159      4 |       2
grg   uuuuu |      -1     -25       0     -13      2 |       0     18
            |      24      12      37      64      3 |       2
igr   xxxxx |      12      -1      20       3      0 |      -6     18
            |      12       8      48      25      6 |       2
irf   xxxxx |     -10       7     -32      -3      5 |      -3     18
            |       7       8      16      19      3 |       3
jpl   uuuuu |      -1      15      18      33      0 |      39     41
            |      16      22     117      41     19 |       2
mit   uuuuu |     -10      14     -85     -51      2 |      24     30
            |      14      12      26      47      3 |       2
ngs   uuuuu |     -19      13     -17     -66      1 |      13     22
            |      35      21     125     140      3 |       2
sio   xxxxx |    -115      19    -126    -120     17 |      31     35
            |      51      43      98     102      6 |       6


Table 7.2221.0   GPS week: 2221   Day: 0   MJD: 59791.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      15     -23      23     -75     -8 |      12     20
emr   uuuuu |     -79      10    -151     -14     -4 |       8     20
esa   uuuuu |      37      -8      55     119     -3 |      23     27
gfz   uuuuu |      30      -8      74     194      5 |      27     31
grg   uuuuu |      30     -42     -10      78     -1 |       3     15
igr   xxxxx |      -5      10     -37      53     -5 |      -2     14
irf   xxxxx |     -10      12     -35      26      8 |      -4     15
jpl   uuuuu |     -24      52    -151      49     33 |      38     40
mit   uuuuu |      -7      21     -72      36      5 |      25     29
ngs   uuuuu |     -22     -13     167    -287      3 |      15     21
sio   xxxxx |    -108      56    -229    -218      9 |      26     29

Table 7.2221.1   GPS week: 2221   Day: 1   MJD: 59792.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      14       5      59     -97      0 |       5     18
emr   uuuuu |     -15      32    -289      71      4 |       2     19
esa   uuuuu |      24      -7      67     151     -4 |      16     23
gfz   uuuuu |      42      15     -23     181      0 |      21     26
grg   uuuuu |      15     -23      -2      46     -4 |      -3     16
igr   xxxxx |       1      -5     -21      -6     -8 |      -8     17
irf   xxxxx |     -18      13     -34      13     12 |      -8     17
jpl   uuuuu |     -10      -9     110     -33     -9 |      36     39
mit   uuuuu |     -24      -4     -68     -45      5 |      20     25
ngs   uuuuu |     -46      -2      -4    -185      3 |      10     19
sio   xxxxx |    -133      73    -167     -11     19 |      22     26

Table 7.2221.2   GPS week: 2221   Day: 2   MJD: 59793.500

                                                         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 |      11     -15     117    -130     -1 |       9     19
emr   uuuuu |      32     -39    -269     285     -1 |       7     18
esa   uuuuu |      30     -11      41     165     -2 |      19     25
gfz   uuuuu |       9       6      51      52      3 |      25     29
grg   uuuuu |      -4      -6     -37     -22      2 |       1     15
igr   xxxxx |      11     -11      62     -15     -3 |      -5     15
irf   xxxxx |      -1      -2     -27      -6      4 |      -3     15
jpl   uuuuu |     -18      34    -111      22     -1 |      40     42
mit   uuuuu |      -4       7     -61     -49      1 |      25     29
ngs   uuuuu |     -59       2     116    -146     -1 |      15     22
sio   xxxxx |    -171       9    -196    -257     16 |      28     32

Table 7.2221.3   GPS week: 2221   Day: 3   MJD: 59794.500

                                                         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 |      -5     -38      73     -37      4 |       9     19
emr   uuuuu |      19     -16     -88     129     -4 |       6     18
esa   uuuuu |      14      20     -66     178      0 |      19     25
gfz   uuuuu |      12     -16      98     -62      3 |      26     29
grg   uuuuu |     -35     -33      10     -74      4 |       0     15
igr   xxxxx |      13      -7      54      -9      2 |      -6     16
irf   xxxxx |     -17      13     -27      -2      4 |      -3     15
jpl   uuuuu |       7       2      79      22    -22 |      41     42
mit   uuuuu |       2      27     -88     -78      0 |      25     29
ngs   uuuuu |     -26      25     -42     -17     -4 |      14     21
sio   xxxxx |    -136      30    -146    -200      8 |      31     34

Table 7.2221.4   GPS week: 2221   Day: 4   MJD: 59795.500

                                                         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 |      26      -8      26    -117      0 |      10     22
emr   uuuuu |     -34       6    -162       8     -2 |       8     20
esa   uuuuu |       4       8     -32     191      3 |      20     26
gfz   uuuuu |       7     -59     283      -8      2 |      28     33
grg   uuuuu |      18     -29      76      29      3 |       3     19
igr   xxxxx |      30      -3      79     -21      1 |      -4     18
irf   xxxxx |      -5       2      -2      -7      3 |       0     19
jpl   uuuuu |       9      26     -43      18    -16 |      42     42
mit   uuuuu |     -14      16     -62     -94      3 |      27     32
ngs   uuuuu |     -31      13     -37      70     -1 |      15     23
sio   xxxxx |     -75      34     -15     -27     25 |      34     39

Table 7.2221.5   GPS week: 2221   Day: 5   MJD: 59796.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -1       1     143    -150      5 |       6     23
emr   uuuuu |     -77     -25     -49      42     -3 |       4     22
esa   uuuuu |      15       2    -149     183     -2 |      16     26
gfz   uuuuu |      11     -47     134      86     -4 |      25     32
grg   uuuuu |      -7     -14     -13     -70      2 |      -1     22
igr   xxxxx |      21       3     -30      18      6 |      -8     22
irf   xxxxx |     -16      -5     -50     -33      3 |      -4     22
jpl   uuuuu |      16       4     118      49      4 |      37     41
mit   uuuuu |     -31       2    -114    -100     -3 |      23     31
ngs   uuuuu |      45      49    -162      54      1 |      10     23
sio   xxxxx |    -157     -47    -165     -55     21 |      34     39

Table 7.2221.6   GPS week: 2221   Day: 6   MJD: 59797.500

                                                         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      -5      87     -20      2 |       7     25
emr   uuuuu |     -51      -8      12      27     -6 |       4     22
esa   uuuuu |       0       4     -89     116     -8 |      17     27
gfz   uuuuu |       1     -46     280    -269     -5 |      26     34
grg   uuuuu |     -25     -26     -25     -78      6 |      -1     22
igr   xxxxx |      13       7      33       2      9 |      -6     23
irf   xxxxx |      -5      13     -48     -10      3 |      -2     23
jpl   uuuuu |      15      -4     124     102     11 |      38     43
mit   uuuuu |      10      27    -127     -30      1 |      24     32
ngs   uuuuu |       5      19    -156      48      3 |      11     24
sio   xxxxx |     -23     -24      36     -70     21 |      39     46


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