[IGSREPORT-23398] Wk 1831 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Thu Feb 26 13:18:08 PST 2015


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1831   (Feb 08, 2015 - Feb 14, 2015)

Contacts: igs.acc at noaa.gov


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

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

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

  Each centre ephemerides are also evaluated individually and independently from
the orbit combination by using week long arcs. The Earth Orientation Parameters
(EOP) used in this evaluation are those submitted by the respective centres.
The IGS combined orbits/clocks and all centres providing both orbit and clock 
solutions are further evaluated by an independent point positioning (navigation)
program that uses both phase and pseudorange data at each SP3 epoch. This is
primarily intended for testing clock solution precision as well as the
orbit/clock consistency.

 Like the clock solutions broadcast in the navigation message, the combined
satellite clocks are corrected for the periodical relativistic correction (see
e.g. GPS interface Control document ICD-GPS-200, p.73):

                              -2*(X.V)/c  [distance unit],

where X and V are the inertial sv state and velocity vectors and c is the speed
of light. Also for compatibility with broadcast GPS time, the IGS clocks use
the linear combination of phase-smoothed P1 and P2 pseudorange data to remove
the 1st order ionospheric delay, with no other delay calibrations applied.


SOFTWARE:
---------

The weighted average software used was originally developed by T. Springer
and G. Beutler in 1993. The GPS long arc orbit analysis software used here for
individual centre ephemeris evaluation was developed by Beutler et al. at the
Astronomical Institute of the University of Bern (AIUB). For more details on
the orbit combination and complete references for both software see:

  Beutler G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS 
  Analysis Centers, Bulletin Geodesique, 69, pp 200-222.

  Kouba J., Mireault Y. and F. Lahaye, 1995, 1994 IGS Orbit/Clock Combination
  and Evaluation, Appendix I of the Analysis Coordinator Report, International
  GPS Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.

  Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1995 Annual Report, 
  pp. 45-76.

  Kouba J. and Y. Mireault, 1997, Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1996 Annual Report, 
  pp. 55-100.


PRODUCTS GENERATED:
-------------------

The resulting average ephemeris and clocks are output to daily files in SP3
format. The satellite accuracy codes displayed in the header are based on the
weighted RMS for each satellite over each daily arc. Note that each file
contains all the satellites that appear in any of the centre ephemeris files.
If a satellite or centre was excluded from combination, a note in the REMARKS
section of this report will identify the exclusion and the reason.

The resulting x and y earth rotation parameters (ERP) associated with the IGS
ephemeris files and their rates (xrt, yrt) are computed using a weighted average
of all available centres (as part of the separate SINEX combination since GPS
week 1051; weighted according to the orbit combination before that time). 

Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
Final IGS solutions. AC LOD biases with respect to Bulletin A are estimated
using Bulletin A most recent 10 days, i.e. up to 5 days prior to the last
non-predicted day of Bulletin A. AC LOD biases are removed and the new AC
bias-free LODs are used to compute a weighted IGS LOD which in turn is
integrated into IGS UT1-UTC. The starting UT1-UTC value is chosen as Bulletin
A fifth day prior to its last non-predicted day. Both IGS LOD and UT1-UTC
values are printed in the IGS Final erp file.



The Final Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:

igs1831[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1831[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1831[0-6].cls  IGS GPS clock combination summary report.
igs18317.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs18317.sum      Complete report.

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

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, GRG, MIT, and
    JPL. The other centres are excluded because of poorer consistency, they provide
    broadcast clocks, or clock corrections are not provided (SIO). The clock
    information not used is still compared to the combination for completeness. The
    value of 999999.999999 microseconds, according to the SP3 format convention,
    signifies that no clock solution is available and therefore must not be used.
    
    In general, if an AC does not contribute to the terrestrial reference frame
    (i.e. the SINEX combination), then any corresponding orbits & clocks
    contributed from that AC should not be included with weight in this
    combination. This is done to ensure a high level of consistency between the TRF
    and the orbital frame. However, there is an exception for the clocks if the AC
    is the reference center. In that case, only the clocks from that AC are
    included with weight.
    
    Starting week 1707:
      cod = cof${wwww}[0-6].[clk,snx,sp3] & cod = cof${wwww}7.[erp,sum]

 2. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1582, a new orbit solution from CNES/GRGS (GRG) is included with
    weight. GRG clocks are included with weight starting 12-Aug-2012 (GPS Week
    1701, day 0, MJD 56151), after a procedural change to generate estimates in
    the center-of-figure frame instead of the center-of-mass frame. GRG LOD
    estimates are included for comparison only.

 3. The following centre clock solutions, which provide broadcast clock
    corrections, were excluded from the combination but kept in the combination
    statistics:
             -> Centre: NGS 

 4. The following clock solutions were excluded from the combination because they
    were biasing the combined clock solutions (clock shifts/outliers) but were
    kept for the RMS computation. Duplicate entries can arise due to separate
    combination runs for the 30-s clocks ACs (listed first) and the 5-min clock
    ACs (listed second).
    
               Day | Centre | PRN/STA list
               ----+--------+---------------
                0  |  COD   | 4 4 8
                0  |  EMR   | 8
                0  |  ESA   | 4 4 BJFS REUN BJFS REUN
                0  |  GFZ   | 4 4 HYDE BOGT BOR1 HYDE INVK
                0  |  GRG   | 8 BOGT
                0  |  JPL   | 4 8
                0  |  MIT   | 1 3 4 6 8 11 13 26 28 32 1 3 4 6 8 11 12 13 14 16
                0  |  MIT   | 26 28 32 BAKO BRFT CEDU HOB2 MAW1 MIZU MORP
                1  |  COD   | 4 4 DAV1 ALGO DAV1
                1  |  EMR   | 8 8
                1  |  ESA   | 2 4 2 4 GRAZ GRAZ
                1  |  GFZ   | 4 4
                1  |  GRG   | DAV1 NKLG DAV1 NKLG
                1  |  JPL   | 8
                1  |  MIT   | 6 8 26 8 26 MOBS MOBS
                2  |  COD   | 2 4 2 4 QAQ1 GRAZ
                2  |  EMR   | 8
                2  |  ESA   | 4 4
                2  |  GFZ   | 4 4 QAQ1
                2  |  GRG   | BOR1 DAV1 GRAZ MCM4 QAQ1 BOR1 DAV1 GRAZ QAQ1
                2  |  JPL   | 4 8
                2  |  MIT   | 6 8 11 26 6 8 11 26 CONZ HOB2 MDVJ NTUS CONZ SANT
                3  |  COD   | 1 4 6 1 4 6 ALGO DUBO ALGO
                3  |  EMR   | 1 6 8 1 6 8
                3  |  ESA   | 4 4 DAV1 MAW1 DAV1 MAW1 NKLG
                3  |  GFZ   | 21 21 DRAG DRAG
                3  |  GRG   | DAV1 HOB2 DAV1 DUBO HOB2
                3  |  JPL   | 4 6 8
                3  |  MIT   | 1 2 4 5 8 12 15 16 19 24 26 28 32 1 2 4 5 8 12 15
                3  |  MIT   | 16 19 24 26 28 32 SPT0 WSRT CRO1 KIRU KOUR SPT0 WSRT
                4  |  COD   | 4 4 NKLG
                4  |  EMR   | 8
                4  |  ESA   | 4 4 HOFN QAQ1 REUN
                4  |  GFZ   | REUN
                4  |  GRG   | HOFN TLSE BRST MAW1 TLSE WES2
                4  |  JPL   | 8
                4  |  MIT   | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                4  |  MIT   | 21 22 23 24 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7
                4  |  MIT   | 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
                4  |  MIT   | 25 26 27 28 29 30 31 32
                5  |  COD   | 4 4 8 MDVJ MDVJ
                5  |  EMR   | 8 8
                5  |  ESA   | 4 4
                5  |  GFZ   | RBAY
                5  |  GRG   | BRST MAW1 RBAY BRST MAW1
                5  |  JPL   | 4 8
                5  |  MIT   | 4 8 12 13 14 16 17 20 24 26 28 4 5 8 11 12 13 14
                5  |  MIT   | 16 17 20 24 26 28 ALIC CONZ DARW GODE JOZ2 KOUR MONP
                5  |  MIT   | NLIB OHI3 TLSE ALIC AMC2 DARW GODE HRAO JOZ2 KOUR
                5  |  MIT   | MATE MIZU MONP NLIB OHI3 SPT0 STJO TIDB TLSE TRO1
                5  |  MIT   | WSRT WTZR
                6  |  COD   | 4 4 PDEL BOR1 PDEL
                6  |  EMR   | 8 8
                6  |  ESA   | 4 4 BJFS BJFS
                6  |  GFZ   | HYDE PDEL HYDE PDEL
                6  |  GRG   | QAQ1
                6  |  JPL   | 4 8
                6  |  MIT   | 2 6 8 11 13 14 15 17 20 21 26 27 28 30 1 5 6 12 14
                6  |  MIT   | 21 25 26 27 30 ALIC BRFT BRST CHUR CONZ CRO1 DRAG
                6  |  MIT   | GLSV GOPE GRAS GRAZ HARB HERS HNPT HOB2 HOFN HRAO
                6  |  MIT   | IRKJ JOZ2 JPLM KIRU KOKB KOUR LAMA MAC1 MATE MDVJ
                6  |  MIT   | MOBS MONP NLIB NNOR NYA1 NYAL ONSA PENC PTBB REYK
                6  |  MIT   | SCH2 SFER SPT0 STJO SUWN TIDB TLSE TRO1 TSKB TWTF
                6  |  MIT   | VILL WES2 WSRT WTZR WUHN YELL ZECK ZIMM KOUR NYAL

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets. Note that only the largest clock offset and drift are output
    to the summary file. However, the clock combination and the listed RMS
    include all the clock segments. In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                6  |  MIT   | ~21:32 | ~ 0.23 ns

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

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

 8. Velocity changes were estimated to alleviate the effects of modeling problems,
    experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G03 |    |    |    |    |    |    |  4 |
           PRN G06 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |

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

10. Small rotations were applied to all the AC orbit and ERP values in order to
    align them to the current IGS reference frame. These RX, RY and RZ rotations
    were estimated in the IGS SINEX combination process, performed by the IGS
    Reference Frame Coordinator at the Institut Geographique National (IGN).
    Starting on 19-Aug-2012 (GPS Week 1702; MJD=56158), ACs began contributing
    products based on 1d SINEX integrations. As a result, the SINEX combinations
    are now done daily instead of weekly, and the associated daily rotations are
    applied here to the orbits and ERPs. The estimated 7 transformations, from
    which only the 3 rotations are applied to the orbit and ERP values, are:
    
            |     |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre | Day |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+-----+---------------------------------------------------
       COD  |   0 |   -1.3    1.3   -2.2      -9     20    -38     .56
       EMR  |   0 |    4.3    2.6   11.4      48     29     14     .07
       ESA  |   0 |     .2   -1.1   -1.0     -11    -22     45     .56
       GFZ  |   0 |    -.3    -.1   -1.4     -27    -59      3     .47
       GRG  |   0 |    -.4    2.3  -15.6       2    -14     17     .89
       JPL  |   0 |    6.7   -7.2   -1.2     -32      1    -24     .52
       MIT  |   0 |    2.6   -2.5   -3.5      29     14    -18     .65
       NGS  |   0 |    -.6    3.4     .9      26      9      3     .56
       SIO  |   0 |   -2.6   -3.7    5.2     -12     10    -20     .65

       COD  |   1 |   -1.3    1.7   -2.0       2     -3    -35     .45
       EMR  |   1 |    -.4    6.8    9.9      28     41     12     .45
       ESA  |   1 |    -.1   -2.2    -.2     -27    -24     29     .51
       GFZ  |   1 |     .0    -.4   -1.5     -14    -59     17     .69
       GRG  |   1 |    3.2    5.1  -17.1       3     -1     11     .70
       JPL  |   1 |     .1   -5.5    6.4     -10     24    -28     .28
       MIT  |   1 |    -.3    -.8   -2.9      28     14    -17     .80
       NGS  |   1 |    1.9   -2.4   -9.5      32     14     10     .57
       SIO  |   1 |   -2.3    -.5    5.1      -1      2    -19     .76

       COD  |   2 |   -2.3     .8   -2.4      -7      8    -26     .46
       EMR  |   2 |   -1.5   -5.9    2.8      33     35      1     .32
       ESA  |   2 |    -.1   -2.1    -.4     -27    -35     44     .54
       GFZ  |   2 |    -.2     .2   -1.7      -7    -61     17     .46
       GRG  |   2 |    3.2   -1.7  -17.2      -4    -10     15     .73
       JPL  |   2 |    3.4   -3.8    3.5     -27     52      1     .44
       MIT  |   2 |    -.6   -1.4     .3      26     12    -14     .62
       NGS  |   2 |   -1.2    2.8   -3.7      35     18     -5     .57
       SIO  |   2 |   -1.8    -.7    1.9      -2     -2      0     .39

       COD  |   3 |   -2.1     .7   -3.1       2     -2     -7     .61
       EMR  |   3 |    5.4   11.1    5.7      32     28      3     .37
       ESA  |   3 |     .1   -2.5    -.5     -29    -27     42     .59
       GFZ  |   3 |     .1    -.2   -2.1       2    -66     12     .68
       GRG  |   3 |    6.8   -5.5  -10.6     -14    -12     36     .98
       JPL  |   3 |   -1.4   -8.1    6.6     -23      3    -30     .49
       MIT  |   3 |    1.7   -4.8   -3.5      17     16    -15     .78
       NGS  |   3 |    1.9   -3.3   -9.4      32     14     -3     .65
       SIO  |   3 |    -.6   -3.8   -2.0      10     -1    -14     .65

       COD  |   4 |   -2.9    -.1   -2.9     -24     16    -24     .58
       EMR  |   4 |    3.1    7.0    6.2      36     26     10     .27
       ESA  |   4 |     .6   -2.5    -.4     -31    -27     51     .51
       GFZ  |   4 |    -.2     .4   -1.4      -4    -62     12     .37
       GRG  |   4 |    8.4   -4.3  -14.1      -6     19     -7     .60
       JPL  |   4 |   -1.1   -9.4    5.1      -4    -25    -21     .28
       MIT  |   4 |    4.4   -4.2    1.3       8      1    -27     .44
       NGS  |   4 |    8.7   -2.0    9.6     -13    -42     26     .65
       SIO  |   4 |    8.2   -2.7    3.8       2     -1    -17     .34

       COD  |   5 |   -1.3    -.9   -3.2      -3     13    -46     .59
       EMR  |   5 |    2.9    6.6    8.3      18     30      4     .02
       ESA  |   5 |     .5   -2.0    -.5     -17    -21     58     .59
       GFZ  |   5 |    -.1    -.3   -2.0       8     -6      7     .60
       GRG  |   5 |    5.6     .2  -13.7      -8     24     -1     .52
       JPL  |   5 |    3.5   -7.1   12.5       7    -13    -49     .53
       MIT  |   5 |    7.0   -2.4   -2.5       2     14    -31     .54
       NGS  |   5 |    8.5   -8.1   13.5     -42    -45     12     .44
       SIO  |   5 |    4.5   -3.1    6.5      -5     -1    -30     .36

       COD  |   6 |   -2.3     .6   -2.8      -1     -2    -27     .38
       EMR  |   6 |   -4.2    3.7    9.3      33     42     -3     .38
       ESA  |   6 |     .0   -2.3    -.1     -24    -11     47     .55
       GFZ  |   6 |     .1     .6   -2.0      -1    -22     17     .47
       GRG  |   6 |   -2.6   -1.7  -23.8     -10      8    -10     .76
       JPL  |   6 |   -1.8   -7.6   10.1     -25     41    -35     .22
       MIT  |   6 |    5.3     .3    1.2       4     13    -29     .57
       NGS  |   6 |   -3.6   -1.9    8.0     -12     11    -24     .46
       SIO  |   6 |    1.7   -3.9    1.0      -9      5    -29     .39


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

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


ORBIT COMBINATION AND EVALUATION STATISTICS:                                    
--------------------------------------------                                    

Most combination statistics are with respect to the combined orbits and
consist of seven parts. The first, Table 1, summarizes all statistics for
the week. It contains means and standard deviations over the week of
satellite ephemeris and clock correction transformation parameters for
each centre (Table 1.1831.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1831.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 2.1831.[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 3.1831.[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 5.1831.0-6). 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 1831 summary.                       (Feb 08, 2015 - Feb 14, 2015)

Table 1.1831.a   GPS week: 1831   MJD: 57061.000-57067.000

         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  251|    0     1     3    20     7     2   .05   17   14 |    -487    -835     30    117
        |    0     0     2    16    24    22   .03           |     350     625
emr   80|    1     0     1    -9   -28    25   .21   14   13 |    6371     494     29    138
        |    1     3     1    16     9    23   .03           |    1518     974
esa  150|    0     1     3     0     0     2  -.35   13   13 |   -1025     275     20    143
        |    0     0     0    19    17    13   .03           |    1309    1081
gfz  201|    0     0    -5    35    -3    22   .07   13   12 |     -53     -54     24     93
        |    0     1     1    15    17    16   .02           |     285     519
grg  175|    2     0    -3   -11    -2   -27   .18   16   15 |      18     143     29    146
        |    0     1     2    20    18    14   .03           |     154     402
igr  n/a|    0     0    -1    -7     0    -6  -.10    5    5 |    2959     540     18     98
        |    0     0     1    12     8     9   .08           |    1569    1101
jpl   80|    1     0     3   -36    18   -25   .19   12   12 |    6425     487     21    107
        |    0     2     1    16    35    18   .05           |    1523     968
mit  349|    0    -1    -1     9    -1    14  -.13   13   12 |     -96    -180     35    233
        |    0     0     1    12    18    12   .05           |     532     839
ngs  231|   -2     0    -1    -9     7    -7  -.07   10    8 |    -462    -814   1490   3086
        |    0     0     4    25    18    13   .02           |     252     523
sio  322|   -1    -2     0    12    -5     7  -.12   15   14 |     ---     ---    ---    ---
        |    0     0     2    37    44    38   .04           |     ---     ---


Table 1.1831.b   GPS week : 1831   MJD: 57061.000-57067.000   

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1831.0   GPS week: 1831   Day: 0   MJD: 57061.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  254|   -1     3     6    36    24    12   .02   17   14 |    -164   -1569     43    123
emr   80|    0     0     1    -1   -29    11   .16   13   13 |    3958    1201     40    155
esa  150|    0     2     2     9    31    22  -.33   14   14 |     948    -356     27    160
gfz  203|    0     0    -5    59    19    -9   .08   13   13 |     249    -125     34    112
grg  176|    2     0     0    14    13   -46   .17   14   14 |     283    -413     37    138
igr  n/a|    0     0    -1    -7    12   -20  -.14    5    5 |     677    1149     21     95
jpl   80|    1     0     2   -35    -6   -33   .13   11   11 |    4006    1215     26    120
mit  349|    0    -1     0    19    -3     4  -.08   12   12 |    -127    -458     36    250
ngs  234|   -1     1    -4   -14    14   -18  -.05    8    8 |      -3   -1420   1210   2966
sio  321|   -2    -2     2   -45   -65    70  -.13   13   13 |     ---     ---    ---    ---

Table 2.1831.1   GPS week: 1831   Day: 1   MJD: 57062.000                            

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  253|   -1     2     6    15    11     9   .05   17   13 |    -961    -293     17    105
emr   80|    0     2     2     6   -44    -5   .17   15   14 |    4808    1497     14    111
esa  150|    0     1     2   -29     9     5  -.40   17   13 |   -1826    1274     12    140
gfz  205|    0     0    -2    50     8    18   .08   12   12 |    -126     297     11     81
grg  176|    2     0    -4   -19   -28   -13   .22   14   14 |    -138     462     16    141
igr  n/a|    0     0     0     7     4     1  -.18    5    5 |    1218    1767     15     92
jpl   80|    0    -4     3   -30    19   -23   .14   12   12 |    4853    1483     17     99
mit  350|    0    -1     0     7    -5     8  -.09   11   11 |    -905     948     24    202
ngs  232|   -2     0    -6   -15    -5    13  -.05   10    9 |    -396   -1050   1236   2929
sio  322|   -1    -2     3    20    30   -18  -.20   16   15 |     ---     ---    ---    ---

Table 2.1831.2   GPS week: 1831   Day: 2   MJD: 57063.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0     2     3    -3    13    40   .04   16   14 |    -603    -624     20    111
emr   80|    0    -6     1     4   -18    15   .22   15   15 |    6568      92     11    119
esa  150|   -1     1     1    -3    -2    -7  -.35   12   12 |    -550   -1148     11    168
gfz  201|    1     1    -6    16    -6    36   .08   12   11 |     180    -639     10     66
grg  168|    2     0    -5   -14   -22   -45   .20   16   16 |      72     330     16    163
igr  n/a|    0     1    -2   -19    -5   -10  -.18    5    5 |    2957     499     15    107
jpl   80|    2    -2     3   -58    75   -23   .17   13   13 |    6633      87     16     95
mit  350|    0     0    -1     5   -11    -4  -.07   12   12 |     -68    -181     25    187
ngs  229|   -2     1     1    14    -8   -22  -.05    9    8 |    -537    -755   1724   3716
sio  325|   -2    -1     0    -1   -39    22  -.13   16   15 |     ---     ---    ---    ---

Table 2.1831.3   GPS week: 1831   Day: 3   MJD: 57064.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  254|   -1     1     3    16   -30     4   .06   21   15 |    -734    -404     42    129
emr   80|    4     5     3     0   -17    55   .26   15   15 |    6562    1115     47    169
esa  150|    0     0     3   -18   -13   -19  -.37   12   12 |     369    -536     28    130
gfz  202|    0     0    -4    19   -15    32   .08   14   12 |    -540     567     33    103
grg  178|    2    -2     0   -16    -2   -24   .17   20   16 |      78      14     43    172
igr  n/a|    0     0    -2   -28     0    -7  -.17    5    4 |    3284    1259     21    139
jpl   80|    2     1     5   -58   -15   -46   .24   13   13 |    6618    1101     27    118
mit  349|    0    -2     0    24    20    15  -.12   12   11 |    -280    -481     39    262
ngs  234|   -2     0    -6     5    36    -7  -.10   10    8 |    -695    -340   1735   2902
sio  328|   -3    -2    -2    61    22    17  -.05   18   17 |     ---     ---    ---    ---

Table 2.1831.4   GPS week: 1831   Day: 4   MJD: 57065.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  252|    0     0     2    35    10    -9   .05   16   12 |    -587    -189     18    114
emr   80|    1     4     1   -10   -30    51   .24   12   12 |    8228     -76     14    123
esa  150|    0     0     3    -5   -10     2  -.35   13   12 |   -1920    1975     10    147
gfz  201|    0    -1    -6    30    -4    15   .05   13   12 |     194    -157     12     89
grg  180|    2    -1    -5   -36    -7   -22   .15   17   16 |     -29     621     16    129
igr  n/a|   -1     0    -2     0     6   -11   .00    4    4 |    5101    -451     15     80
jpl   80|    1     1     2   -16    -6   -45   .25   12   12 |    8307     -91     17     96
mit  350|    0    -1    -1   -13    17    24  -.15   13   13 |      73    -258     38    223
ngs  235|   -2     0     1    20    25    -6  -.10    9    8 |    -599    -124   1653   2705
sio  325|   -1    -2    -1   -19     0     1  -.11   15   14 |     ---     ---    ---    ---

Table 2.1831.5   GPS week: 1831   Day: 5   MJD: 57066.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  249|    0     1     4    37    39   -15   .11   16   14 |    -446   -1023     39    123
emr   80|    0     0     0   -34   -33     9   .22   12   12 |    7759   -1280     41    140
esa  150|    0     1     4    22     7    10  -.34   12   12 |   -1615     230     27    131
gfz  200|    0    -1    -6    31     9    26   .04   13   11 |     -81    -766     33    104
grg  173|    2    -1    -5    18    25    -8   .15   16   16 |      41    -349     38    151
igr  n/a|    0     1    -2     0   -11    -3  -.01    4    4 |    4298   -1391     21     93
jpl   80|    1     0     2   -24     0   -15   .24   12   12 |    7790   -1267     26    119
mit  350|    1    -2    -2    18     6    23  -.17   15   13 |    -249     740     39    249
ngs  230|   -1     0     2   -52     5   -18  -.09   11    9 |    -295   -1478   1332   3302
sio  322|   -1    -1    -1    22   -41    13  -.12   15   14 |     ---     ---    ---    ---

Table 2.1831.6   GPS week: 1831   Day: 6   MJD: 57067.000                            

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  245|    0     1     0     4   -18   -28   .04   16   14 |      82   -1746     37    119
emr   80|    1     0     2   -31   -24    40   .23   12   12 |    6719     911     39    152
esa  150|    0     0     4    19   -18     1  -.32   12   12 |   -2584     489     25    127
gfz  196|    0    -1    -6    39   -33    39   .08   13   13 |    -248     444     36    102
grg  175|    2     0    -7   -25     2   -27   .18   17   16 |    -181     338     40    133
igr  n/a|    0     0    -2    -2    -3     9  -.02    5    5 |    3181     953     23     80
jpl   80|    0     0     2   -29    59     7   .17   11   11 |    6769     883     24    102
mit  346|    1     0    -3     5   -34    32  -.21   14   14 |     884   -1571     45    261
ngs  228|   -1     0     2   -23   -11     5  -.07   10    9 |    -710    -537   1540   3086
sio  315|   -1    -1     0    48    56   -52  -.11   13   13 |     ---     ---    ---    ---

       
       
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 3.1831.0   GPS week: 1831   Day: 0   MJD: 57061.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   18   10   16   13   10    4    9    9    7    8    4 |    79   80   77   79   76   77   69   78   80   78    77
   2E |   22   12    7   11   15    3   10   16    7   13    4 |    31   24   26   29   29   24   24   24   23   24    23
  X3  |   15   13   15   12  ---    6   12   10   11   32    6 |   130  134  132  119  ---  126  131  124  125  137   128
   4E |   58   18   16   12   16    6   14   13   11   14    7 |   132  109  109  109  108  108  115  112  107  113   111
   5  |   14   15   17   15   13    5   12   15   11   16    5 |    44   50   44   35   40   39   48   38   39   42    40
   6E |   17    9   16   13   16    6   11   15   10   14    4 |   414  407  406  404  404  407  315  407  408  407   407
   7E |   10   16    9    9   13    4   15   12    9   13    4 |    53   49   46   51   50   49   47   49   55   44    48
  X8E |   32   11   13   17   23   10   13   19   11  ---    6 |    65   57   47   42   18   50   55   60   50  ---    53
   9  |    9    8   15   13   12    3    9    8    6   10    3 |    54   53   47   56   56   52   52   51   50   47    51
  10  |    8   11   13   11   14    5    8   11    6   10    3 |    27   25   23   35   35   24   24   30   27   28    26
  11E |   16    9   14    9    9    5    7    8    6   10    3 |    31   26   21   27   27   21   22   21   24   23    23
  12  |   12   11   13   16   16    5   13   12    7   12    4 |    27   26   17   31   31   19   24   20   22   23    22
  13  |   15   15   16   14   19    4   13   16   10   11    5 |    34   41   31   45   50   36   41   36   41   34    37
  14  |   11   11   15   14   13    8   14   11    8   12    4 |    28   34   28   41   37   33   31   37   35   35    32
  15  |   12   14   13   16   14    5   15   13    8   13    4 |    38   41   35   45   41   36   40   38   40   39    38
  16  |   21   14   10   16   17    4    9   15   10   21    5 |    30   22   17   21   23   17   21   18   19   16    17
  17  |   11   15   16   14   15    4    9   13    9   13    4 |    28   32   24   37   31   24   29   31   28   27    27
  18  |   20   16   13   20   17    7   13   18   10   17    5 |    24   24   21   35   32   21   22   28   20   26    21
  19  |   10   13   14   13   13    5   12   12    8   14    4 |    25   27   18   29   25   18   23   22   19   23    20
  20  |    9   13   15   16   14    4   11   14    8   17    4 |    29   34   25   38   36   29   31   35   31   31    30
  21E |   15   14    8   11   17    4    9    8    9   12    4 |    29   25   27   28   22   24   26   24   24   29    24
  22  |   18   12   15   13   14    6   11   13    9   14    4 |    30   30   29   39   40   31   31   38   33   35    31
  23  |   11    9   14   13   13    4    9   11    9   17    4 |    27   31   26   35   31   28   30   27   26   21    26
  24  |   14   11   14   12   15    4    7   15    7   12    4 |    25   23   26   24   26   18   22   19   19   26    21
  25  |    9   17   16    8    9    5   10    9    6    9    3 |    21   26   23   19   23   16   22   15   15   23    18
 X26  |   25   17   16  ---  ---    9  ---   12   11  ---    8 |    34   39   24  ---  ---   30  ---   33   37  ---    31
  27  |   17   12   14   11   11    4    9   11    8   13    4 |    24   27   23   19   22   17   24   18   20   24    20
  28  |    8   17   17    9   16    6   12   14    7   10    4 |    22   29   19   26   29   17   24   26   21   23    21
  29  |   16   17   11   18   15    5   16   10   11   19    5 |    30   29   21   27   26   21   31   23   24   25    23
  30E |    9   11   14    9   17    4    8    9    8   10    3 |    31   28   33   27   29   27   27   27   30   24    27
  31E |   17   14   12   11   12    4   10    9   10   14    4 |    44   45   40   47   47   43   44   48   47   48    44
  32  |   12    9   12   11   12    5    7   10    7    9    3 |    23   31   23   32   31   25   30   30   26   29    27
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   17   13   14   13   14    5   11   12    8   13      |T   51   51   47   52   49   47   47   49   48   50    48
 WRMS |   14   13   14   13   14    5   11   12    8   13      |NE  34   36   30   37   33   30   34   33   32   34    32
 MEDI |   14   13   14   13   14    5   11   12    8   13      |MD  30   31   26   35   31   27   30   30   28   28    27

Table 3.1831.1   GPS week: 1831   Day: 1   MJD: 57062.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   23   11   16   13   10    5    8    7   10   12    4 |    72   75   73   76   70   72   59   70   73   71    72
   2E |   11   13   59   11   21    5   13   18   12   15    8 |    25   26   63   19   21   23   22   16   25   18    21
  X3  |   13   11   12   10  ---    4   11    9   11   32    5 |    94   97   94   88  ---   91   98   90   86  105    92
   4E |   50   45   14   12   17    7   17   16   15   15    8 |   105   98   97   93   97   95  100   98   97   94    95
   5  |   12   14   15   14   11    6   15   13   10   16    4 |    32   39   30   28   33   28   40   30   29   32    30
   6E |   30   10   21   13   15    5   13   15    9   15    5 |   459  457  458  458  455  455  339  457  457  454   456
   7E |   11   17   10   14   12    4   16   13   11   13    4 |    35   30   27   34   31   28   30   34   34   26    29
  X8E |   25   15   15   17  ---    9   12   22   13  ---    7 |    58   52   44   45  ---   47   51   57   50  ---    49
   9  |   11   10   17   10    9    4    9    7    7   16    3 |    35   38   26   34   36   31   37   32   35   26    32
  10  |    8    9   15    9   16    4    9   10    6   16    4 |    26   30   26   29   29   26   26   27   29   29    27
  11E |   16   16   11    9    9    7    8   10    9   17    4 |    23   25   19   22   22   16   19   17   21   18    17
  12  |   12   11   12   14   19    5   13   14   10   18    4 |    26   26   17   28   29   18   24   17   24   17    20
  13  |   10   13   14   10   15    5   14   13   10   12    4 |    22   31   24   27   34   22   31   22   25   23    24
  14  |   10   13   14   14   15    4   12   10    7   16    4 |    27   29   24   31   26   24   25   27   30   28    26
  15  |   13   13   12   13   13    4   14   11   11   16    4 |    33   36   31   36   34   30   34   31   33   35    32
  16  |   16   14   10   14   13    4   12   11    9   17    4 |    28   25   18   21   23   16   23   17   21   16    18
  17  |    8   13   18   17   13    3   12   11   10   13    4 |    24   33   23   35   27   21   26   25   21   25    24
  18  |   18   15   12   17   17    7   17   17   12   18    5 |    27   25   25   28   26   19   23   24   18   27    21
  19  |   15   14   14   13   14    7   13   12   12   16    4 |    25   28   17   22   23   14   24   17   17   16    17
  20  |   10   14   18   14   15    4   10   13    9   18    4 |    23   30   24   27   29   22   26   24   25   22    23
  21E |   14   14    6   11   17    5   14    7    9   14    4 |    23   26   28   24   25   25   25   25   27   23    24
  22  |   17   13   12   12   15    7   14   11   11   17    4 |    29   29   29   32   31   25   26   30   24   31    26
  23  |   10   10   14   11   11    6   10    9    7   19    4 |    23   25   20   23   20   20   27   21   20   13    20
  24  |   15   11   13    9    9    5    9   10    8   12    3 |    26   24   27   24   25   19   22   19   22   23    21
  25  |   11   17   15    9   13    5    7    7    8   12    4 |    18   24   22   18   24   15   19   13   18   17    16
 X26  |   18   12   16  ---  ---   13  ---   11   14  ---    7 |    28   28   21  ---  ---   22  ---   21   28  ---    23
  27  |   16   14   14   10   10    4   10    9    9   17    4 |    26   29   24   20   25   18   24   20   23   24    21
  28  |    9   12   14   11   14    5   11   12    9   12    4 |    22   26   17   24   28   16   23   22   20   22    20
  29  |   19   12    9   13   19    6   13   11   12   24    5 |    30   27   16   24   26   18   26   20   21   20    20
  30E |    8   11   14    9   16    3    9    9    7   11    3 |    28   26   28   23   27   21   24   22   25   21    23
  31E |   19   15   10   11   15    4   10    8   12   18    4 |    32   34   28   32   31   28   31   32   35   36    30
  32  |   11   10   11    8    9    5    6    8   10    8    3 |    23   27   22   27   25   22   25   25   29   21    24
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   17   15   17   12   14    5   12   11   10   16      |T   47   48   45   46   45   42   42   43   45   44    43
 WRMS |   13   14   13   12   14    5   12   11    9   15      |NE  29   32   26   29   27   24   29   26   27   27    26
 MEDI |   13   13   14   12   14    5   12   11   10   16      |MD  27   29   25   28   27   22   26   24   25   23    24

Table 3.1831.2   GPS week: 1831   Day: 2   MJD: 57063.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   25   12   16    8   12    5   17    9   11   12    5 |    82   77   82   81   78   79   99   77   84   78    79
   2E |   17   16    8   10   18    5   15   20    9   18    5 |    27   29   23   25   30   24   27   29   25   30    24
  X3  |   15   16   12   11  ---    7   12   12   12   31    5 |   105  108  104   98  ---  100  108   98  103  113   103
   4E |   42   19   14   11   17    7   16   13   14   17    6 |    62   59   43   47   47   49   53   45   49   44    47
   5  |   11   15   14   16   18    5   15   12   11   18    5 |    39   46   34   31   34   32   44   32   36   37    35
  X6E |  116   20   27   24   24   13  ---   19   41   22   11 |   478  469  473  469  468  463  ---  464  470  466   468
   7  |   17   19    7   12   18    6   18   17    8   12    5 |    68   65   60   65   65   63   62   61   62   59    62
  X8E |   34   14   15  ---  ---    8   13   22   14  ---    8 |    60   45   35  ---  ---   40   44   51   36  ---    41
   9  |    8   10   14    9   14    3    9    8    4   11    3 |    38   43   33   41   47   37   43   38   34   33    37
  10  |    8   13   13   10   19    4   12   10    6   13    4 |    26   27   28   33   33   24   26   27   24   27    26
  11E |   14    9   10    8   13    5    7   10    8   15    3 |    26   23   18   22   24   17   19   16   23   17    19
  12  |   17   14   10   15   18    4   12   11    8   16    4 |    30   28   17   26   28   19   23   19   23   18    20
  13  |   10   15   14   10   20    4   14   12    7   10    4 |    27   36   26   33   42   27   35   27   25   26    28
  14  |    9   13   14   16   16    6   14   11    9   19    4 |    30   28   24   37   32   28   27   31   25   32    27
  15  |   14   14   11   13   17    3   13   12    8   15    4 |    39   40   34   41   41   34   39   34   31   39    35
  16  |   16   12   11   13   19    4   11   12    8   20    4 |    27   24   17   20   24   18   23   18   20   13    18
  17  |   10   20   15   11   15    4   12   13   10   15    4 |    22   32   18   27   28   19   26   25   24   22    22
  18  |   21   16   12   16   17    6   15   19   14   19    5 |    27   22   22   31   25   21   23   23   20   26    20
  19  |   16   14   11   14   14    5   13   13   10   17    4 |    28   30   18   25   27   19   25   22   24   18    21
  20  |   14   19   15   14   19    5   13   15   10   19    5 |    30   33   25   32   32   25   27   28   21   23    24
  21E |   23   17    6   13   17    5   13    7    9   16    4 |    31   26   26   24   24   26   27   26   27   24    23
  22  |   15   15   13   12   14    5   13   12    8   19    4 |    30   27   26   34   32   30   28   31   25   34    27
  23  |   13    9   13   12   16    5   10   11    8   19    4 |    24   28   20   25   26   19   26   21   17   15    19
  24  |   16   12   14   10   13    4   10   12    6   13    4 |    24   25   25   23   25   18   22   17   22   24    20
  25  |   12   11   12    9   11    5    9    8    6   12    3 |    19   22   21   18   22   15   21   15   18   18    17
 X26  |   23   12   14  ---  ---    8  ---   14   19  ---    8 |    25   29   24  ---  ---   25  ---   25   38  ---    27
  27  |   12   12   12   12   13    4   10    8    6   14    3 |    27   29   24   19   24   18   25   20   23   26    22
  28  |   10   25   12   12   17    5   14   12    6   12    4 |    19   30   17   21   27   14   23   19   19   20    18
  29  |   15   16   10   14   19    4   17   12   10   24    5 |    29   29   19   25   25   19   27   23   22   25    21
  30E |   13   10   12    7   16    4   10   10    6   10    3 |    27   28   31   25   25   24   26   26   25   26    25
  31E |   14   11   10   10   18    5   11   10    7   15    4 |    51   53   50   55   56   51   51   56   51   60    52
  32  |   10    9   11    8   12    5    6   10    7   10    3 |    23   25   22   27   28   21   25   25   22   22    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   16   15   12   12   16    5   13   12    9   16      |T   50   50   44   49   48   44   35   45   45   47    45
 WRMS |   14   15   12   11   16    5   13   12    8   15      |NE  31   33   27   31   30   26   31   28   28   29    27
 MEDI |   14   14   12   12   17    5   13   12    8   15      |MD  28   29   25   27   28   24   27   26   25   26    24

Table 3.1831.3   GPS week: 1831   Day: 3   MJD: 57064.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1E |   20   23   13   14   11    6  ---   10   14   16    5 |    91   92   88   90   83   87  ---   86   89   87    87
   2E |   24   12    9   11   22    4   16   11   10   24    5 |    35   26   25   24   27   21   25   24   26   33    24
  X3  |    9   14   11   10  ---    6   14   11   11   28    5 |   123  127  122  113  ---  118  123  118  118  128   120
   4E |   44   24   12   15   15    7   23   14   11   19    7 |   127  118  123  119  123  119  126  121  121  119   120
   5  |   14   13   15   15   17    6   15   14   12   20    5 |    39   44   39   34   37   33   47   32   36   36    36
   6E |   66   19   22   25   56   11   21   17   18   20   10 |   452  432  434  438  421  439  550  431  441  428   434
   7  |   17   17    8   10   21    4   16   12   10   15    5 |    46   44   39   44   46   43   43   42   47   40    42
  X8E |   19   14   12   21  ---    6   14   25   10  ---    6 |    57   55   45   42  ---   45   51   62   46  ---    49
   9  |    8    9   15    9   11    4   12    9    6   13    3 |    49   50   41   49   48   46   50   47   46   41    46
  10  |    8   14   12   10   19    3   11   10    6   15    4 |    35   33   27   36   36   31   29   34   36   33    32
  11E |   10   18   12    8   15    5    9   12    8   19    4 |    26   32   24   25   29   22   24   26   26   29    24
  12  |   16   13    9   18   22    4   15   10   11   19    5 |    27   25   14   27   30   17   25   18   20   14    18
  13  |   12   14   13   13   18    4   13   11   10   11    4 |    33   34   27   32   38   29   35   29   34   29    29
  14  |   10   12   12   16   14    7   10   11   11   19    4 |    28   28   26   40   30   30   27   31   35   31    29
  15  |   15   15   13   12   17    4   13   14   10   16    4 |    53   51   45   48   47   47   49   50   50   49    47
  16  |   24   12   10   13   19    4   11   10   10   21    5 |    32   26   17   19   25   17   25   17   18   15    18
  17  |   11   18   15   18   14    4   13   14    7   15    5 |    23   34   21   31   32   20   27   25   22   23    23
  18  |   20   17   12   16   17    5   14   19   12   17    5 |    25   27   20   31   27   23   24   26   24   26    22
  19  |   17   14   11   14   17    6   11   14   14   18    5 |    27   29   19   26   26   17   27   20   18   22    20
  20  |   10   20   13   16   18    3   14   14   10   22    5 |    28   33   26   38   34   29   28   32   34   27    29
  21E |   18   15    6   13   12    5   12   11   10   16    4 |    29   25   24   26   25   22   23   23   28   36    24
  22  |   16   15   13   11   16    5   11   12   10   16    4 |    30   31   27   36   37   31   30   35   33   35    30
  23  |   10   10   12   12   13    4   13    9    8   18    4 |    28   28   22   29   26   23   28   22   24   19    23
  24  |    9   12   12    9   12    4    8   11    9   14    3 |    23   25   24   22   23   17   24   19   19   22    20
  25  |   11   15   13    9   15    4   10    8    7   16    4 |    19   23   21   20   25   16   22   13   15   20    17
 X26  |   34   18   20  ---  ---    5  ---   18   19  ---   10 |    40   31   28  ---  ---   26  ---   27   40  ---    29
  27  |   24   16   13    9   16    6   12   10    6   16    4 |    27   33   25   21   26   19   27   21   23   30    23
  28  |    8   18   13   16   16    3   15   13    9   15    4 |    20   32   17   28   32   17   26   22   18   20    21
  29  |   20   13    9   17   20    4   16   11   10   25    5 |    31   29   20   28   26   21   29   21   22   26    22
  30E |   12   14   14   10   15    4   11    9    6   15    4 |    30   25   30   24   26   24   28   25   29   25    25
  31  |   17   15    9   10   22    4   10   13    8   18    4 |    38   39   35   42   46   38   40   43   42   43    39
  32  |   11   12   11    9   12    6    8   12    7   10    3 |    26   33   28   34   29   28   29   32   31   31    29
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   21   15   12   14   20    5   13   12   10   18      |T   53   52   47   52   50   47   54   49   50   50    48
 WRMS |   15   15   12   12   16    4   13   11    8   17      |NE  34   36   29   35   31   29   34   31   32   32    31
 MEDI |   15   14   12   13   16    4   13   11   10   16      |MD  30   32   26   32   30   26   28   27   31   30    29

Table 3.1831.4   GPS week: 1831   Day: 4   MJD: 57065.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   24   14   16   14   19    5   14   12   11   15    5 |    73   68   73   70   66   69   56   67   71   72    69
   2E |   17   10    9   10   19    4   14   13    7   15    4 |    27   28   23   23   26   25   27   24   23   22    23
  X3  |   13   14   10   16  ---    4   13   14    9   35    6 |   137  139  135  126  ---  132  135  129  138  140   134
   4E |   48   19   13   13   19    5   19   12   14   16    7 |    92   76   78   77   74   77   81   73   77   80    76
   5  |   10   12   16   13   16    4   14   16   10   17    4 |    37   39   35   32   35   31   42   30   31   32    33
   6E |   19   11   18   14   17    5   13   15   12   15    5 |   252  249  254  248  246  250  207  253  248  255   250
   7  |   12   17    8   10   20    3   14   12    8   11    4 |    36   32   28   33   39   31   33   31   31   28    30
  X8E |   30   22   14   20  ---    7   16   29   11  ---    8 |    61   51   38   37  ---   40   46   63   38  ---    44
   9  |    9    8   13   12   11    4    9    9    5   11    3 |    43   44   37   44   49   41   44   41   39   38    41
  10  |    8    9   13   12   19    3   11   13    4   12    4 |    25   22   20   28   29   23   20   25   20   23    22
  11E |   21    9   11    8   14    4    8   13    8   16    4 |    36   28   20   27   29   24   26   25   24   25    24
  12  |   17   12   11   17   21    4    8   13    9   16    4 |    27   25   16   27   28   19   23   19   21   13    19
  13  |    9   13   13   12   18    4   12   13   10   13    4 |    31   35   26   31   38   29   34   28   30   25    28
  14  |    9   12   13   17   13    4   10   13   10   15    4 |    27   28   22   36   29   25   24   30   22   30    25
  15  |    9   11   13   13   13    5   13   14   10   17    4 |    33   34   29   32   34   30   34   29   29   29    29
  16  |   16   12    9   19   18    5   11   14   10   21    5 |    26   25   17   27   25   19   24   16   20   14    18
  17  |   10   17   15   18   16    5   13   15   10   13    5 |    25   32   21   31   27   21   27   25   22   20    22
  18  |   18   14   13   14   19    6   14   20   13   17    5 |    26   24   20   27   27   19   22   25   17   21    18
  19  |   11   13   11   12   16    5   11   13    9   15    4 |    27   28   17   23   25   20   27   22   20   18    20
  20  |   12   13   13   15   18    4   14   19    9   20    5 |    28   31   25   36   37   29   29   32   29   26    28
  21E |    9   11    8   11   24    5   15    9   11   12    4 |    26   25   26   24   23   22   22   22   26   23    22
  22  |   11   12   13   12   16    5   13   14   12   17    4 |    31   27   26   34   36   27   27   33   28   31    27
  23  |    9    8   11   13   15    4    9   10    9   16    4 |    26   28   24   29   27   24   29   23   22   18    23
  24  |   11   11   14    9   11    4    8   11    8   11    3 |    20   23   24   20   24   19   21   20   19   21    19
  25  |   10   19   14    9   14    3    9    9   10   11    4 |    18   27   22   21   25   18   23   18   16   17    18
 X26  |   19   17   17  ---  ---    8  ---   13   21  ---    9 |    30   32   24  ---  ---   28  ---   25   39  ---    27
  27  |   12   11   13   10   11    4    9   10    6   14    3 |    24   28   23   20   25   21   26   22   20   25    21
  28  |   10   11   13   13   18    5   13   15    9   12    4 |    22   28   19   26   29   19   24   23   23   19    21
  29  |   19   11   14   15   20    5   13   13   11   26    5 |    31   28   23   26   25   22   28   21   21   23    22
  30E |    9    9   13    9   12    4   10   12    6   11    3 |    39   34   40   35   33   37   39   38   38   35    36
  31  |   11   11    9   12   17    6   10   10    8   16    4 |    35   35   30   38   42   36   35   37   33   33    33
  32  |   10    6    9   11   16    5    7   15    7   11    3 |    25   30   24   29   28   25   27   31   22   26    25
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   16   12   13   13   17    4   12   13    9   15      |T   43   43   38   42   40   39   40   40   39   39    38
 WRMS |   12   12   12   12   16    4   12   13    8   14      |NE  32   34   28   33   30   29   32   30   29   29    29
 MEDI |   11   12   13   13   17    4   13   13    9   15      |MD  28   28   24   31   29   25   27   25   24   25    25

Table 3.1831.5   GPS week: 1831   Day: 5   MJD: 57066.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   14   10   17   12   15    6   10    9   13   12    4 |    53   54   58   51   52   54   46   52   58   54    53
   2E |   16   11    8   10   20    4   14   15    6   11    4 |    25   27   20   19   21   21   24   24   19   23    20
  X3  |   13    8   11   14  ---    7   11   14   10   26    5 |   108  108  107   99  ---  103  110  100  110  109   106
   4E |   37   16   13   13   17    6   18   13   22   18    7 |   102   99  102  100  101  101  103   99  106  102   100
   5  |   15   11   17   16   16    4   12   17   12   16    5 |    37   36   32   29   32   28   36   27   30   31    30
   6E |   17   11   14   15   17    5   13   15   12   13    5 |   228  229  230  226  230  231  227  225  233  232   229
   7  |   14   16    7   12   15    4   18   13    9   14    4 |    39   36   29   35   36   34   36   33   36   30    32
  X8E |   34   12   16   20  ---    9   13   38   17  ---    9 |    71   56   48   53  ---   53   53   72   52  ---    53
   9  |   10    8   12   11   10    4   10   10    7   12    3 |    39   43   34   41   45   38   43   39   34   35    38
  10  |    5    9   12   11   16    3   12   12    6   13    4 |    24   28   24   31   28   25   25   28   28   30    26
  11  |   24    8   11   11   16    4    7   15   14   17    5 |    36   29   24   29   32   25   28   26   30   24    25
  12  |   18   11   12   14   20    3   12   15    8   15    5 |    28   25   15   22   28   18   24   19   21   11    18
  13  |   14   13   13   13   20    4   13   12   12   11    4 |    28   35   24   28   35   27   33   25   28   26    26
  14  |   10   10   14   13   15    4   10   11   11   15    4 |    23   25   21   30   25   23   26   26   23   28    23
  15  |   10   12   14   12   15    3   14   15   13   19    5 |    38   40   33   38   37   35   39   36   38   38    35
  16  |   14   12    8   16   17    5   12   11   12   20    5 |    25   26   18   22   25   20   25   18   22   12    19
  17  |   10   19   13   16   16    5   11   15   12   14    5 |    25   29   21   28   28   21   26   25   29   23    23
  18  |   17   14   12   15   19    4   13   22   14   20    5 |    25   27   20   25   27   19   23   22   18   23    19
  19  |   15   12   10   12   16    4   12   16   12   17    4 |    26   31   20   25   27   21   27   24   25   19    22
  20  |    8   15   13   14   17    3   14   19    9   17    5 |    22   30   21   30   29   23   25   27   22   23    23
  21E |   11   10    6   10   19    4   11   17   11   10    4 |    18   21   18   15   19   16   19   28   20   18    17
  22  |   15   12   12   13   17    4   13   13   11   17    4 |    26   27   23   27   30   23   25   27   22   27    23
  23  |   11    9   11   14   10    5   11   10    8   16    4 |    25   28   22   26   21   23   26   21   17   17    20
  24  |   10   10   13    9   12    4   10   14    9   11    4 |    23   24   27   19   25   21   24   22   22   22    21
  25  |   13   17   14    9   15    4    9    9    6    9    4 |    22   26   23   21   23   19   23   18   17   13    18
 X26  |   24   18   23  ---  ---   11  ---   16   21  ---   10 |    24   26   35  ---  ---   33  ---   20   41  ---    25
  27  |   16   11   12    7   13    4   10   11    8   12    4 |    27   31   23   21   27   22   28   22   22   25    23
  28  |   11   11   13   13   18    5   12   17    9   11    4 |    26   28   21   27   30   20   27   23   25   21    23
  29  |   22   14   12   17   19    4   14   16   11   23    5 |    34   30   21   22   24   22   27   20   23   19    21
  30E |   12   11   13   10   12    5   11   15    7   11    4 |    51   56   55   50   52   54   56   51   50   51    52
  31  |   22   10    9   10   20    3   10   18   10   15    5 |    35   36   26   33   44   32   35   36   32   32    32
  32  |   13    7    9   12   16    4    8   19    6   11    4 |    23   30   24   28   30   26   28   32   25   28    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   16   12   12   13   16    4   12   15   11   15      |T   41   43   38   40   40   38   41   39   39   38    38
 WRMS |   14   12   12   11   16    4   12   13    9   14      |NE  30   33   27   30   28   27   31   28   29   27    27
 MEDI |   14   11   12   13   16    4   12   15   11   14      |MD  26   30   24   28   29   23   27   26   25   25    23

Table 3.1831.6   GPS week: 1831   Day: 6   MJD: 57067.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   1E |   11   12   15   12   15    4   11   11   10    8    4 |    59   58   67   60   62   61   57   58   59   63    61
   2E |   13   11    8   13   27    4   11   15    7   11    4 |    32   32   32   31   37   28   27   25   27   33    28
  X3  |   13   12    8   13  ---    4   12   12    9   20    4 |   178  183  180  172  ---  176  179  172  179  174   177
   4E |   41   15   11   12   17    6   15   12   17   12    6 |   104  100   94   94   95   98  101   96   98   97    97
   5  |   11   11   18   16   18    5   15   19   11   17    5 |    38   42   39   31   35   35   45   31   34   39    35
   6E |   12   12   14   18   17    5    9   12    7   11    4 |   242  251  254  251  247  249  244  246  250  252   250
   7  |   12   16    8   10   18    4   14   12   11   14    4 |    43   37   34   41   41   37   39   37   38   35    36
  X8E |   21   12   13   19  ---    8   17   40   13  ---    8 |    53   51   48   43  ---   45   54   64   43  ---    47
   9  |   12   10   12   11   11    4    8   13    6   10    3 |    58   57   49   57   59   56   57   58   51   49    54
  10  |    9   10   12   11   15    3    9   14    6    8    3 |    30   30   29   37   40   31   32   33   30   33    31
  11  |   21   10   11    9   17    4    7   15   11   10    4 |    33   26   18   21   33   19   23   16   19   21    20
  12  |   19   12   12   12   20    6   12   13   11   14    4 |    27   28   19   27   31   20   24   21   23   20    21
  13  |   10   13   14   13   17    3   13   12   10   10    4 |    35   39   30   41   44   34   37   34   35   30    34
  14  |   15   10   13   14   16    5   11   12   11   13    4 |    32   32   27   44   37   32   29   35   35   37    32
  15  |   13   12   13   15   17    5   13   15   11   17    5 |    41   43   37   47   46   41   42   40   41   43    40
  16  |   15   11    7   18   16    5   13   11   12   17    4 |    28   26   19   29   28   21   23   17   26   16    21
  17  |   13   15   10   20   17    4    9   15   12   12    5 |    22   29   23   35   28   24   28   27   26   23    24
  18  |   21   13   14   16   19    6   13   20   15   18    5 |    29   27   23   37   36   26   26   29   27   30    26
  19  |   10   12   10   17   14    6   11   19   10   15    4 |    24   30   21   32   27   22   27   27   22   23    23
  20  |   10   14   14   16   17    4    9   17   10   14    4 |    33   34   28   42   46   33   33   37   32   31    33
  21E |   18   12    8   11   17    6   11   12   11    9    4 |    27   19   16   13   15   13   15   15   15   19    13
  22  |   16   11   13   12   18    6   12   13   12   15    4 |    35   34   31   43   46   34   34   41   34   40    35
  23  |   12   10   10   14   11    6   11   11   10   15    4 |    29   29   25   33   28   28   30   27   24   22    25
  24  |   13   11   15    8   13    6   11   16    7   15    4 |    24   25   28   22   28   23   25   20   20   23    21
  25  |    9   17   13   10   12    5    8    9    9   11    4 |    19   31   22   22   25   20   25   18   17   23    21
 X26  |   25   14   17  ---  ---   14  ---   17   27  ---   10 |    34   33   21  ---  ---   27  ---   31   36  ---    27
  27  |   14   10   12   11   12    4    9   13    9   12    4 |    26   29   24   25   27   22   26   23   26   24    24
  28  |   12   18   10   16   18    5   10   18   12   10    5 |    24   32   23   31   32   23   27   24   28   24    24
  29  |   18   11   13   14   19    6   13   17   12   21    5 |    34   33   26   30   27   26   32   26   24   31    26
  30  |   13   11   14    8   23    5   10   12    7    9    4 |    45   46   48   47   50   46   47   45   44   44    45
  31  |   20   12    9   12   21    5   12   15   10   17    5 |    35   37   29   41   47   37   35   38   36   37    35
  32  |   12    8    9   11   17    5    7   19    9   10    4 |    28   31   26   34   33   29   30   36   28   30    29
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   16   12   12   13   17    5   11   14   10   13      |T   46   47   43   48   45   44   46   45   44   45    44
 WRMS |   14   12   12   13   16    5   11   14    9   13      |NE  37   39   34   41   35   35   38   36   36   36    35
 MEDI |   13   12   12   13   17    5   11   13   10   12      |MD  33   32   28   37   36   29   32   31   30   31    29



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 4.1831   GPS week: 1831   MJD: 57061.0-57067.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3058 |U    8     6    18 |U   11    14    46 |U    7     7    20 |
emr | emr 3063 |    14     9    24 |U   12    14    43 |     8     7    19 |
esa | esa 3072 |     6     7    17 |U   10    13    44 |     8     7    19 |
gfz | gfz 2954 |U    5     5    16 |U   11    13    41 |U    9     7    20 |
grg | grg 2797 |     6     7    23 |U   13    14    49 |U    9     8    22 |
igr | igr 3049 |     7     6    14 |    10    13    42 |     7     6    17 |
igs | igs 3060 |     6     8    19 |    11    13    42 |     9     9    19 |
jpl | jpl 2939 |    15    10    23 |U   12    13    47 |U    9     8    20 |
mit | mit 3072 |    20    13    31 |U   15    29    72 |U    9     7    21 |



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

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

Table 5.1831.0   GPS week: 1831   Day: 0   MJD: 57061.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3068 |     8     5    18 |     7    15    24 |     6     5    14 |
emr | emr 3063 |     9     9    25 |     7    12    18 |     7     7    21 |
esa | esa 3072 |     7     9    21 |     6    11    24 |     7     6    16 |
gfz | gfz 2968 |     6     7    17 |     7    14    22 |     6     5    16 |
grg | grg 2880 |     7     6    17 |     7    12    27 |     6     7    18 |
igr | igr 3068 |     7     8    16 |     6    11    22 |     6     5    13 |
igs | igs 3058 |     7    11    31 |     8    16    26 |     6     9    17 |
jpl | jpl 2968 |    10    10    26 |     7    11    18 |     8     8    21 |
mit | mit 3072 |     9     9    22 |    10    12    32 |    10     7    22 |

Table 5.1831.1   GPS week: 1831   Day: 1   MJD: 57062.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3066 |     7     6    20 |     7     9    30 |     7     7    18 |
emr | emr 3064 |    15    11    37 |     7    11    31 |     8     7    21 |
esa | esa 3072 |     8     9    24 |     8    11    35 |     8     6    15 |
gfz | gfz 2968 |     5     6    19 |     9     8    30 |     7     6    15 |
grg | grg 2784 |     8     9    47 |     9     8    31 |     8     7    20 |
igr | igr 3067 |     6     7    15 |     8     9    31 |     7     7    15 |
igs | igs 3069 |     6     8    22 |     8     9    29 |     7     7    18 |
jpl | jpl 2962 |    15    12    32 |     9     8    34 |     8     9    20 |
mit | mit 3072 |    10     7    21 |     8     9    31 |     8     7    19 |

Table 5.1831.2   GPS week: 1831   Day: 2   MJD: 57063.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3057 |     8     5    17 |     9    10    36 |     7     8    17 |
emr | emr 3064 |    15    10    32 |    10    11    29 |     9     9    20 |
esa | esa 3072 |     8     7    20 |     9    10    29 |     8     9    17 |
gfz | gfz 2874 |     5     5    21 |     9     9    31 |     8     8    18 |
grg | grg 2783 |     6     6    28 |    11     9    36 |     7     7    18 |
igr | igr 3057 |     8     7    13 |     8     9    27 |     7     7    15 |
igs | igs 3059 |     8     8    18 |     9     9    26 |     7     8    16 |
jpl | jpl 2872 |    18    13    30 |    11    12    49 |     9    10    23 |
mit | mit 3072 |    18     9    49 |    13    13    39 |     8     7    17 |

Table 5.1831.3   GPS week: 1831   Day: 3   MJD: 57064.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3055 |     9     6    13 |    15    12    55 |     8     6    20 |
emr | emr 3064 |    25     6    18 |    16    15    51 |    10     6    22 |
esa | esa 3072 |     7     6    12 |    13    13    35 |    14     9    22 |
gfz | gfz 2969 |     5     4    14 |    14    12    46 |    19    15    32 |
grg | grg 2784 |     5     6    18 |    17    13    48 |    15     9    22 |
igr | igr 3028 |     7     6    11 |    14    13    42 |     9     6    18 |
igs | igs 3052 |     6    10    15 |    17    11    40 |    16    14    25 |
jpl | jpl 2872 |    31     7    21 |    17    12    50 |    12     8    20 |
mit | mit 3072 |    22    14    25 |    18    26   149 |    15    10    23 |

Table 5.1831.4   GPS week: 1831   Day: 4   MJD: 57065.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3049 |     7     5    21 |    15    19    68 |     8     9    26 |
emr | emr 3064 |     9     8    15 |    16    19    67 |     9     6    18 |
esa | esa 3072 |     5     6    16 |    14    18    79 |     8     5    22 |
gfz | gfz 2968 |     8     6    16 |    14    19    60 |     8     4    22 |
grg | grg 2784 |     4     5    15 |    18    20    92 |     8     7    28 |
igr | igr 3028 |     8     7    15 |    14    18    72 |     8     6    20 |
igs | igs 3068 |     5     6    13 |    14    18    69 |     8     5    20 |
jpl | jpl 2968 |    10    10    17 |    17    20    72 |     9     6    22 |
mit | mit 3072 |    17    11    21 |    23   101   119 |     9     5    22 |

Table 5.1831.5   GPS week: 1831   Day: 5   MJD: 57066.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3050 |     7     6    20 |    14    20    59 |     8     7    23 |
emr | emr 3064 |    18    14    24 |    13    17    53 |     8     6    16 |
esa | esa 3072 |     5     5    12 |    13    17    57 |     8     7    21 |
gfz | gfz 2968 |     5     5    14 |    14    15    51 |     8     5    19 |
grg | grg 2784 |     5     7    16 |    16    18    64 |     9     8    27 |
igr | igr 3045 |     5     5    13 |    12    16    53 |     6     6    19 |
igs | igs 3047 |     6     7    15 |    12    13    48 |     8    10    20 |
jpl | jpl 2968 |    16    13    23 |    15    17    59 |     9     8    17 |
mit | mit 3072 |    24    18    32 |    17    23    65 |    10     9    25 |

Table 5.1831.6   GPS week: 1831   Day: 6   MJD: 57067.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3067 |     8     7    16 |    12    13    49 |     7     8    23 |
emr | emr 3062 |     9     8    18 |    13    13    53 |     8     7    17 |
esa | esa 3072 |     5     5    12 |    10    15    49 |     7     7    19 |
gfz | gfz 2969 |     5     4    11 |    10    12    49 |     7     6    16 |
grg | grg 2784 |     6     8    20 |    12    14    44 |     8     8    24 |
igr | igr 3053 |     6     6    15 |    10    13    49 |     6     6    19 |
igs | igs 3067 |     6     7    16 |    12    13    53 |     7    10    20 |
jpl | jpl 2968 |     9     7    16 |    11    13    50 |     8     9    18 |
mit | mit 3072 |    42    22    48 |    16    22    67 |     8     7    19 |


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 6.1831   GPS week: 1831   MJD: 57061.500-57067.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuxu |       5     -28      99      84      3 |      14     20
            |      22      16      61     191      6 |       2
emr   uuuuu |      19       2     -16      -2      5 |      43     47
            |      24      18     141      67     13 |       5
esa   uuuuu |      -5       1     -15      14      5 |      11     18
            |      17      28      67      75      4 |       3
gfz   uuuuu |       2     -43     -35     -40     -1 |      11     17
            |      28      18      99     111      5 |       2
grg   uuuuu |      24      13    -208      97     -1 |      49     50
            |      20      17      58     113      7 |       2
igr   xxxxx |       2     -11      19      48      1 |       0     13
            |      14      13      56      50      5 |       2
irf   xxxxx |      -4      -9     -38     -26     -1 |      -1     13
            |       6       7      61      18      3 |       2
jpl   uuuuu |     -11      29     128      22     -2 |      32     36
            |      44      22      80      64     16 |       3
mit   uuuuu |     -12     -10     -96     -66     -1 |      20     23
            |      10      20     116      70      6 |       2
ngs   uuuxu |      -2       8      49      68     -5 |      11     17
            |      45      30      82     261      3 |       2
sio   uuxxx |     -13      27    -343    -169      9 |      60     62
            |      12      16      93     105      9 |       3


Table 7.1831.0   GPS week: 1831   Day: 0   MJD: 57061.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuxu |      -3     -45      99     161      4 |      13     20
emr   uuuuu |      44      35    -130      49     -9 |      47     52
esa   uuuuu |     -36      11     -49     -67      3 |      11     18
gfz   uuuuu |     -31     -55     -14    -206      0 |      13     19
grg   uuuuu |      35     -11    -187     171      5 |      50     52
igr   xxxxx |      -7      -2      87      87     -8 |       0     13
irf   xxxxx |      -1     -21      52       7      1 |       0     14
jpl   uuuuu |      41      27     189      -1    -16 |      36     39
mit   uuuuu |       4     -38      76      63      4 |      20     24
ngs   uuuxu |     -24      24     -35      77     -5 |      14     18
sio   uuxxx |     -28      11    -274     -50      8 |      59     62

Table 7.1831.1   GPS week: 1831   Day: 1   MJD: 57062.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuxu |      18     -33     172     308     12 |      13     20
emr   uuuuu |      32      -7    -157     -68    -12 |      44     48
esa   uuuuu |      -4      46     -84     142      0 |      10     17
gfz   uuuuu |       8     -58      93      53      1 |      12     18
grg   uuuuu |      50      13    -261     170      6 |      50     52
igr   xxxxx |      -5     -24      64      37      6 |      -1     13
irf   xxxxx |      -1     -10      17     -37      1 |       0     13
jpl   uuuuu |     -38      38      70     -92    -12 |      34     37
mit   uuuuu |     -14     -12      11    -119      4 |      20     24
ngs   uuuxu |     -13      -1      71    -190     -9 |      13     17
sio   uuxxx |     -11      28    -303    -206      9 |      58     60

Table 7.1831.2   GPS week: 1831   Day: 2   MJD: 57063.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuxu |      21      -8     175     235      3 |      15     21
emr   uuuuu |     -27      -6    -101      -8     11 |      41     46
esa   uuuuu |      11       3     -21     -14      8 |      10     17
gfz   uuuuu |      31     -24      64      -8     -4 |      12     17
grg   uuuuu |      48      17    -271     259     -3 |      50     52
igr   xxxxx |       3      10     -65      82     -1 |       0     13
irf   xxxxx |       2      -6     -49     -43      4 |      -1     13
jpl   uuuuu |     -58      66      78      31    -22 |      33     36
mit   uuuuu |      -7       3    -129    -145      6 |      20     24
ngs   uuuxu |       9     -31      94     -99     -6 |      12     17
sio   uuxxx |     -30       6    -301    -380      9 |      59     61

Table 7.1831.3   GPS week: 1831   Day: 3   MJD: 57064.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuxu |      43     -33     103      38      2 |      13     19
emr   uuuuu |       5      19    -102    -115     13 |      37     41
esa   uuuuu |      14       6     -87      24      9 |       9     16
gfz   uuuuu |      43     -28    -136      81     -6 |       9     16
grg   uuuuu |      17       5    -110      -6    -14 |      48     49
igr   xxxxx |      19       0      27      72      3 |      -2     13
irf   xxxxx |      -1     -13     -23     -36     -2 |      -3     13
jpl   uuuuu |      24      44     257      41     23 |      27     32
mit   uuuuu |      -9     -22     -44     -39     -2 |      19     23
ngs   uuuxu |     -69     -11      67    -168    -10 |      10     16
sio   uuxxx |      -7      32    -390    -123     24 |      57     59

Table 7.1831.4   GPS week: 1831   Day: 4   MJD: 57065.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuxu |      -9     -27      27      -1      1 |      13     20
emr   uuuuu |      35     -14      53      73     24 |      38     42
esa   uuuuu |      -8      12      62     -65      7 |      10     17
gfz   uuuuu |      -9     -22     -97    -141     -6 |       9     16
grg   uuuuu |       7      40    -255      98      0 |      46     48
igr   xxxxx |     -19     -17       9     -57      5 |      -2     13
irf   xxxxx |      -6      -5     -47     -38     -2 |      -3     13
jpl   uuuuu |      25      17     179     117     12 |      29     34
mit   uuuuu |     -12     -20    -145     -68     -3 |      18     22
ngs   uuuxu |     -24       4      42       5     -5 |       9     16
sio   uuxxx |       2      17    -222    -159     13 |      60     62

Table 7.1831.5   GPS week: 1831   Day: 5   MJD: 57066.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuxu |     -18     -47      95     125      5 |      13     19
emr   uuuuu |      28     -11     119      29      6 |      42     47
esa   uuuuu |     -14     -32      -9       4      1 |      11     19
gfz   uuuuu |     -29     -46    -162    -102      1 |       8     16
grg   uuuuu |       4       2    -197      53     -4 |      46     47
igr   xxxxx |      21     -24     -41      69      1 |      -1     13
irf   xxxxx |     -16      -9    -130     -14     -5 |      -3     13
jpl   uuuuu |      -3       0      82      57      6 |      29     34
mit   uuuuu |     -30      -3    -250     -37     -9 |      19     23
ngs   uuuxu |      45      64     177     397     -3 |       8     15
sio   uuxxx |     -15      50    -487    -105     -4 |      62     64

Table 7.1831.6   GPS week: 1831   Day: 6   MJD: 57067.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuxu |     -15      -5      23    -276     -8 |      19     22
emr   uuuuu |      15      -1     204      23      7 |      49     51
esa   uuuuu |       4     -36      85      71      3 |      17     20
gfz   uuuuu |       1     -66       5      46      6 |      14     17
grg   uuuuu |       9      25    -176     -69     -1 |      50     51
igr   xxxxx |       0     -17      55      46     -2 |       4     12
irf   xxxxx |      -8       1     -82     -21     -3 |       2      9
jpl   uuuuu |     -68      13      44       1     -4 |      33     38
mit   uuuuu |     -18      24    -191    -114     -5 |      23     24
ngs   uuuxu |      63       8     -69     451      0 |      12     17
sio   uuxxx |      -5      44    -421    -157      5 |      67     69



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