[IGSREPORT-23205] Wk 1820 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Thu Dec 11 08:54:03 PST 2014


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1820   (Nov 23, 2014 - Nov 29, 2014)

Contacts: igs.acc at noaa.gov


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

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

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

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

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

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

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


SOFTWARE:
---------

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

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

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

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

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


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

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

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

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



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

igs1820[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1820[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1820[0-6].cls  IGS GPS clock combination summary report.
igs18207.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs18207.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   | 4 4
                0  |  ESA   | TUVA
                0  |  GFZ   | 1 2 3 6 9 30 1 3 6 30
                0  |  GRG   | 26 AUCK BARH BOGT BRFT BRMU CEDU CRO1 DARW DGAR GOPE
                0  |  GRG   | GRAZ GUUG HARB HOB2 HOFN ISPA KELY KOUR LAMA MAL2
                0  |  GRG   | MANA MAS1 MATE MCM4 MDVJ NOVM SCOR SOFI SSIA THTI
                0  |  GRG   | TIDB ZECK GRAZ ZECK
                0  |  JPL   | 26 MCM4 SCOR
                0  |  MIT   | 8 8 26 BRFT KOUR BRFT KOUR
                1  |  ESA   | NOVM BJFS NOVM REUN TUVA
                1  |  GFZ   | 1 2 6 30 1 6 30 ALRT
                1  |  GRG   | 26 26 ALGO ALRT BARH BOGT BOR1 BRFT BRST CEDU CRO1
                1  |  GRG   | DARW GOPE GRAZ GUUG HARB HNPT HOB2 KOUR LAMA MAL2
                1  |  GRG   | MDVJ NRC1 SCH2 SOFI SSIA TIDB TOW2 WES2
                1  |  JPL   | 26 SCOR
                1  |  MIT   | 8 26 8 26 BRFT ALRT BRFT
                2  |  COD   | BRAZ
                2  |  ESA   | TUVA
                2  |  GFZ   | 1 2 6 9 30 1 6 30 CRO1 DGAR GODE GUAM HNPT HOB2 MAG0
                2  |  GFZ   | PALM STJO TIDB TOW2 TWTF
                2  |  GRG   | 26 26 BOGT BRST DARW GRAZ HYDE MAL2 REUN SOFI THTI
                2  |  GRG   | BOGT BRST HYDE MAL2 REUN SOFI
                2  |  MIT   | 26 26 YIBL YIBL
                3  |  COD   | 9
                3  |  ESA   | TUVA
                3  |  GFZ   | 1 2 3 6 9 30 1 3 6 9 30 ALBH ALGO ALRT AUCK BAKO
                3  |  GFZ   | BOR1 BRAZ BRFT CONZ CRO1 DARW DGAR DRAG GLPS GMSD
                3  |  GFZ   | GODE GOPE GUAM GUUG HARB HNPT HOB2 HOLB HRAO IISC
                3  |  GFZ   | INVK IRKJ JPLM KERG KIRU LAMA MAG0 MAW1 MCM4 MDVJ
                3  |  GFZ   | PALM PERT POL2 POLV PRDS RABT REUN SSIA STJO THU3
                3  |  GFZ   | TIDB TOW2 TWTF WILL WSRT WUHN YKRO ALGO REUN
                3  |  GRG   | 26 26 BOGT GRAZ GRAZ NOVM
                3  |  MIT   | 26 8 26 BRFT BRFT
                4  |  COD   | HOB2 HOB2
                4  |  GFZ   | 1 3 6 9 30 1 3 6 30 ALBH ALGO ALIC AUCK BAKE BAKO
                4  |  GFZ   | BOGT BOR1 BRFT CEDU CHTI CONZ CRO1 DARW DGAR DRAG
                4  |  GFZ   | DRAO FAIR GLPS GOPE GUAM GUUG HARB HOB2 HOLB HRAO
                4  |  GFZ   | IISC ISPA KERG LAMA MAC1 MAL2 MANA MAS1 MAW1 MCM4
                4  |  GFZ   | MDVJ NKLG NOVM NRC1 PALM PDEL PERT POL2 RABT REUN
                4  |  GFZ   | REYK SCH2 SSIA STJO THTI THU3 TIDB TOW2 TWTF WES2
                4  |  GFZ   | WHIT WSRT WUHN YIBL ZIMM HOB2
                4  |  GRG   | 26 26 BRST GUUG KOUR PIMO DRAG GRAZ PIMO TIXI
                4  |  MIT   | 8 26 8 26 BAKO KOUR
                5  |  ESA   | 3 3 KOUR KOUR REUN
                5  |  GFZ   | 1 2 3 6 9 30 1 3 6 30 ALBH ALGO ALIC ALRT AUCK BAKO
                5  |  GFZ   | BOGT BOR1 BRFT BRMU CHTI CRO1 DAEJ DARW DGAR DRAO
                5  |  GFZ   | FAIR FLIN GODE GOPE HARB HNPT HOLB HRAO HYDE IISC
                5  |  GFZ   | INVK JPLM KERG KOUR LAMA MAC1 MANA MAS1 MCM4 MDVJ
                5  |  GFZ   | NANO NKLG NOVM NRC1 NYAL PDEL PERT POL2 POLV PRDS
                5  |  GFZ   | RABT REUN SCH2 SSIA STJO THU3 TIDB TLSE TOW2 TRO1
                5  |  GFZ   | USUD VILL WILL WSRT ZIMM NOVM REUN
                5  |  GRG   | 26 26 DARW GUUG MCM4 MONP REUN ZECK PALM ZECK
                5  |  MIT   | 8 13 26 8 13 26
                6  |  ESA   | KOUR KOUR
                6  |  GFZ   | 1 2 3 6 9 30 1 3 6 30 ALBH ALGO ALIC ALRT ARTU AUCK
                6  |  GFZ   | BAKO BJFS BOGT BOR1 BRAZ BRFT CEDU CHTI CONZ CRO1
                6  |  GFZ   | DARW DAV1 DUBO FAIR GLPS GODE GOPE GUAM GUUG HARB
                6  |  GFZ   | HNPT HOB2 HOFN HOLB HRAO HYDE IISC INVK ISPA JPLM
                6  |  GFZ   | KERG KOUR LAMA MAC1 MAL2 MANA MAS1 MATE MAW1 MCM4
                6  |  GFZ   | MDVJ MIZU NKLG NRC1 NYAL PALM PARC PERT PIE1 POL2
                6  |  GFZ   | POLV PRDS RABT REUN SCH2 SOFI SSIA SYOG THTI THU3
                6  |  GFZ   | TIDB TOW2 TRO1 USUD VILL WILL WSRT ZECK ZIMM HOB2
                6  |  GRG   | BRST DARW DGAR KELY PDEL WES2 DGAR WES2
                6  |  MIT   | 26 1 3 8 26

 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
               ----+--------+---------------
                0  |  ESA   |   3
                0  |  GFZ   |   3
                0  |  GRG   |   9
                1  |  GFZ   |   3
                3  |  ESA   |   3   9
                3  |  GFZ   |   9
                3  |  GRG   |   9
                4  |  ESA   |   3
                5  |  ESA   |   3
                5  |  NGS   |  26

 7. Velocity changes were estimated to alleviate the effects of modeling problems,
    experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G03 |  4 |  8 |  4 |  4 |  4 |  4 |  4 |
           PRN G09 |  4 |  4 |  4 |  4 |  4 |  4 |  4 |

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

 9. Small rotations were applied to all the AC orbit and ERP values in order to
    align them to the current IGS reference frame. These RX, RY and RZ rotations
    were estimated in the IGS SINEX combination process, performed by the IGS
    Reference Frame Coordinator at the Institut Geographique National (IGN).
    Starting on 19-Aug-2012 (GPS Week 1702; MJD=56158), ACs began contributing
    products based on 1d SINEX integrations. As a result, the SINEX combinations
    are now done daily instead of weekly, and the associated daily rotations are
    applied here to the orbits and ERPs. The estimated 7 transformations, from
    which only the 3 rotations are applied to the orbit and ERP values, are:
    
            |     |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre | Day |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+-----+---------------------------------------------------
       COD  |   0 |   -2.5   -1.4   -1.8     -55     20     28     .22
       EMR  |   0 |    2.9   -2.9   19.6      24     49      9     .25
       ESA  |   0 |     .3    -.7     .2      27    -47     59     .28
       GFZ  |   0 |     .3     .6   -1.2     -31    -71     17    -.26
       GRG  |   0 |    1.1    8.2  -18.2     -22     17     17     .61
       JPL  |   0 |    2.3    2.6   12.0     -64      9     26     .43
       MIT  |   0 |   10.2    1.9    6.5       1      6    -22     .28
       NGS  |   0 |    7.3    -.2   10.9     -39    -29      5     .45
       SIO  |   0 |    7.0   -2.6   35.9     -35     20    -89     .27

       COD  |   1 |   -2.2    -.9   -2.3     -34     25     37     .40
       EMR  |   1 |    6.3   -4.9   15.3      31     46     24     .16
       ESA  |   1 |    -.5   -1.0     .1      23    -45     56     .42
       GFZ  |   1 |     .0    -.2    -.9     -40    -74     16    -.16
       GRG  |   1 |   11.6    4.8  -17.9      -6     14     71     .76
       JPL  |   1 |   -2.5    1.9   10.6     -59     21      7     .29
       MIT  |   1 |   15.1    3.2    1.0       1      0    -28     .43
       NGS  |   1 |   11.2   -2.1    7.2     -39    -53     22     .65
       SIO  |   1 |    8.6    1.9   35.7       8     32    -43     .28

       COD  |   2 |   -2.0    -.9   -2.1     -36     15     17     .38
       EMR  |   2 |    3.0   -5.5   21.7      19     32     17     .25
       ESA  |   2 |     .1    -.9    -.2     -19    -15     46     .47
       GFZ  |   2 |    -.1     .5   -1.6     -34    -73      2     .24
       GRG  |   2 |    2.8    1.9  -16.1     -17     33     40     .69
       JPL  |   2 |    -.4   -1.0    5.5     -33     27    -11     .21
       MIT  |   2 |   11.0     .3    2.5       1      3    -22     .57
       NGS  |   2 |    5.9    1.0    5.4     -16    -26     -2     .56
       SIO  |   2 |   10.1    3.0   41.2      54     38    -41     .58

       COD  |   3 |   -1.7   -1.3   -2.4     -38    -11     21     .76
       EMR  |   3 |    6.3    2.5   17.8      10     41     14     .34
       ESA  |   3 |    -.1   -1.5    -.4     -22    -16     41     .49
       GFZ  |   3 |     .9     .7   -1.9     -26    -97      4     .17
       GRG  |   3 |    1.7     .5  -12.0     -21     14     38     .77
       JPL  |   3 |    1.2   -6.8   17.8     -23     27    -14     .75
       MIT  |   3 |    8.3    2.7    3.6       5      5    -19     .66
       NGS  |   3 |    7.5   -1.2    2.7     -23    -44      5     .71
       SIO  |   3 |   10.2   -2.1   33.4      -3     10     49     .69

       COD  |   4 |   -1.8     .0   -1.7     -37     11     33     .39
       EMR  |   4 |    -.1    9.0   16.4      19     34     25     .40
       ESA  |   4 |     .5    -.8    -.3     -13    -34     51     .47
       GFZ  |   4 |     .6     .9   -1.7     -22    -83     12    -.03
       GRG  |   4 |    8.8   -2.0  -20.6     -26    -15     13     .77
       JPL  |   4 |    5.1   -7.1   14.0     -46     35      1     .33
       MIT  |   4 |   12.0    1.2    -.7      -3      0    -17     .62
       NGS  |   4 |    6.0   -1.4     .8     -18    -31     -1     .63
       SIO  |   4 |    9.3     .2   30.8       4      8     11     .41

       COD  |   5 |   -1.4    -.4   -1.7     -37     -7     25     .43
       EMR  |   5 |    5.5   13.5   18.5     -15     22     13     .40
       ESA  |   5 |     .3    -.9    -.5     -13    -20     59     .35
       GFZ  |   5 |     .1    1.0   -1.4     -21    -91     14     .02
       GRG  |   5 |   12.5    3.1  -25.9     -45      9     15     .64
       JPL  |   5 |   11.6    1.7   14.9     -24      3    -15     .48
       MIT  |   5 |    9.7    5.9    2.1       1      5    -23     .55
       NGS  |   5 |    7.4    3.7    5.6       1    -38      0     .63
       SIO  |   5 |    8.5    1.7   23.4       4     10      2     .46

       COD  |   6 |   -2.0    -.9   -1.3     -32     -4     29     .35
       EMR  |   6 |    8.1    3.6   20.0      -7     13     13     .43
       ESA  |   6 |     .7   -1.2    -.5     -12    -14     50     .38
       GFZ  |   6 |     .6    1.1   -1.3     -26    -95     16    -.08
       GRG  |   6 |   15.8    3.3   -4.5     -31    -10    -13     .76
       JPL  |   6 |   10.4   -3.7   16.0     -61    -26    -73     .37
       MIT  |   6 |   12.2    4.4    3.6       0      2    -38     .52
       NGS  |   6 |   11.0    1.2    5.6     -16    -58     13     .54
       SIO  |   6 |   12.3    1.8   24.6       4     -1    -20     .62


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

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


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

Most combination statistics are with respect to the combined orbits and
consist of seven parts. The first, Table 1, summarizes all statistics for
the week. It contains means and standard deviations over the week of
satellite ephemeris and clock correction transformation parameters for
each centre (Table 1.1820.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.1820.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 2.1820.[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 3.1820.[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 5.1820.0-6). 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 1820 summary.                       (Nov 23, 2014 - Nov 29, 2014)

Table 1.1820.a   GPS week: 1820   MJD: 56984.000-56990.000

         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  243|    1     0     0     2     1     2   .01   10    9 |   -1141     -54     18    120
        |    0     0     2    16    26    18   .03           |     263     329
emr   80|    0    -2     7    -6    -6    17   .22   13   13 |    4410    -198     17    160
        |    1     3     1    13    12    19   .02           |     733    1093
esa  150|    0     0     4    -2     3    13  -.37   13   13 |   -1123    1098     11    148
        |    1     0     0    12    21    12   .04           |     942    1436
gfz  198|   -2     1    -8     7   -28    43   .13   12   11 |    -258     -67     15    170
        |    0     0     1    15    13    13   .04           |     549     852
grg  166|    0    -1   -12    -1    10   -22   .22   16   15 |     -71     289     16    165
        |    1     1     3    27    23    18   .02           |     386     541
igr  n/a|   -1     0    -1    -2    16    -6  -.21    5    5 |    1607      49     16     85
        |    0     0     0    10    16    14   .02           |     766    1047
jpl   80|    0     0     7    -8    16   -24   .23   12   12 |    4424    -188     17    136
        |    1     1     1    14    13    29   .03           |     740    1098
mit  349|    2     0    -4     9     6    16  -.22   13   11 |    -440     100     21    151
        |    0     0     1    23    35    10   .03           |     329     613
ngs  200|    0     0     0    -1     0   -40  -.05   13    8 |   -1149      74   1347   3027
        |    0     1     2    15    24    10   .04           |     378     535
sio  315|    0     0     2     8    -4     9  -.12   13   12 |     ---     ---    ---    ---
        |    0     0     1    18    25    35   .08           |     ---     ---


Table 1.1820.b   GPS week : 1820   MJD: 56984.000-56990.000   

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

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    4    4    4    4    4    4    4 |
   2  |    4    4    4    5    4    4    4 |
   3  |    0    0    0   35   28   15   21 |
   4  |    5    4    4    4    4    4    4 |
   5  |    4    4    4    5    4    4    4 |
   6  |    4    4    4    4    4    4    4 |
   7  |    4    4    4    5    5    4    4 |
   8  |    6    6    5    6    5    4    5 |
   9  |    6    6    8    0    6    4    4 |
  10  |    4    4    4    4    4    4    3 |
  11  |    4    4    4    4    4    4    4 |
  12  |    5    5    5    5    5    5    5 |
  13  |    4    3    4    4    4    4    3 |
  14  |    4    4    4    4    4    4    3 |
  15  |    4    5    5    5    5    5    5 |
  16  |    6    6    5    5    5    4    4 |
  17  |    4    4    4    4    4    4    4 |
  18  |    5    5    5    5    5    5    5 |
  19  |    5    5    5    5    5    5    5 |
  20  |    5    5    5    5    5    5    5 |
  21  |    4    4    4    4    4    4    4 |
  22  |    4    5    5    4    4    4    4 |
  23  |    5    4    4    5    4    4    4 |
  24  |    4    4    4    5    5    4    4 |
  25  |    4    4    4    4    4    4    4 |
  26  |    8    8    8    9    9    8   11 |
  27  |    5    5    5    5    5    4    4 |
  28  |    4    4    4    4    4    4    4 |
  29  |    5    5    5    5    5    4    5 |
  30  |    4    4    4    4    4    3    3 |
  31  |    5    5    6    5    5    5    5 |
  32  |    4    4    4    4    4    4    4 |



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1820.0   GPS week: 1820   Day: 0   MJD: 56984.000                            

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  236|    1     0    -1     2    -9    15  -.04    9    9 |   -1571      49     18    118
emr   80|   -1    -3     9   -11    -4     1   .23   13   13 |    5437    -268     18    162
esa  150|    1     0     3    14    -5    -3  -.39   12   12 |   -2253    2581     11    137
gfz  202|   -3     1   -11    21   -38    38   .09   12   11 |    -962     997     14    171
grg  162|   -1    -1   -13    11    27   -37   .23   17   16 |    -528     901     19    194
igr  n/a|   -1     0    -1    17     0    -5  -.23    5    5 |    2181     -15     15     70
jpl   80|    0     1     8     0    20    30   .29   13   13 |    5454    -302     17    130
mit  350|    1    -1    -3    13    65    10  -.18   14   12 |    -377     626     22    145
ngs  200|    0     0     2   -16   -36   -53   .00   11    8 |   -1567     187   1158   2665
sio  309|    0    -1     2    -4    15     7  -.03   13   11 |     ---     ---    ---    ---

Table 2.1820.1   GPS week: 1820   Day: 1   MJD: 56985.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  244|    0     0    -2   -11     3    12   .02   10    9 |   -1273     443     21    141
emr   80|   -2    -4     8   -25   -28     2   .20   13   13 |    4531    -252     16    165
esa  150|    0     0     5    -3     5    30  -.42   12   12 |    -901    -170     11    140
gfz  200|   -3     1    -7    15    -2    17   .08   12   11 |       8    -857     19    183
grg  160|    0     0   -15    24    12    10   .24   16   16 |    -148     100     17    166
igr  n/a|   -1     0    -1     0    11   -30  -.21    5    5 |    1309    -254     18     93
jpl   80|    1     1     8   -36     8   -13   .21   13   13 |    4519    -234     17    143
mit  350|    2     0    -2    45   -20    23  -.18   13   10 |    -106      65     21    164
ngs  196|    0     0     0   -11    39   -39  -.02   12    8 |   -1268     518   1118   2886
sio  305|    1    -1     5    23   -38   -32  -.04   14   13 |     ---     ---    ---    ---

Table 2.1820.2   GPS week: 1820   Day: 2   MJD: 56986.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  246|    2     0     1     0    33   -17  -.02   11   10 |   -1015    -140     18    107
emr   80|   -3    -8     9    18   -12    47   .22   14   14 |    3990    -221     20    160
esa  150|    1     1     5   -14     2     4  -.43   13   13 |    -207     -22     10    141
gfz  196|   -3     2    -7    -1   -29    55   .10   12   11 |    -731    -101     14    164
grg  165|   -1     0    -9     5    26   -14   .22   14   14 |    -401     309     17    153
igr  n/a|    0     0    -1    -8    21    -6  -.21    5    5 |     771      40     15     76
jpl   80|    0     0     5     5    32   -10   .22   12   12 |    3960    -185     18    127
mit  349|    2     0    -4   -18   -14    29  -.19   12   10 |     -56   -1007     23    167
ngs  200|    0     0     0    13   -15   -51  -.03   12    8 |   -1545     954   1508   2690
sio  307|    1     0     0    11   -14   -24  -.02   13   12 |     ---     ---    ---    ---

Table 2.1820.3   GPS week: 1820   Day: 3   MJD: 56987.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  249|    1    -1     3     9   -51   -24   .00   12   11 |   -1307     -98     20    127
emr   80|    2     0     6     0   -10    22   .20   12   12 |    3770     615     17    126
esa  150|   -1    -1     4   -22   -38    28  -.34   13   13 |     315    -495     16    148
gfz  200|   -2     1    -8    32   -34    37   .14   13   12 |     165    -292     17    156
grg  171|    1     0    -9     8    40   -43   .19   15   15 |     176     355     16    147
igr  n/a|   -1     1    -1    -8    -3   -11  -.24    6    5 |     978     664     18     90
jpl   80|   -1    -1     7   -20    20   -44   .22   11   11 |    3805     629     19    148
mit  350|    3     0    -5     6    44    29  -.23   14   12 |    -961     783     22    155
ngs  206|   -1     4    -4    -9    -7   -34  -.02   13   10 |   -1297     -94   1481   3331
sio  321|    0     0     0     3    40    52  -.19   13   13 |     ---     ---    ---    ---

Table 2.1820.4   GPS week: 1820   Day: 4   MJD: 56988.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  246|    0     1    -1   -14     9    18   .03    9    9 |   -1079     -10     17    127
emr   80|   -1     2     5    -5    10    -8   .24   13   13 |    4177    1533     18    161
esa  150|    0     1     5     7    12     9  -.35   13   13 |   -2100    3094     15    191
gfz  198|   -3     1    -7     0   -45    48   .17   13   12 |    -470    1192     16    173
grg  171|    3    -2   -14    -8     1   -32   .19   16   15 |    -256    1028     16    167
igr  n/a|   -1     0     0     5    41    18  -.19    6    6 |    1356    1892     18     88
jpl   80|    0    -1     7    -3    25   -36   .27   12   12 |    4199    1554     18    135
mit  349|    2    -1    -4    17   -20    14  -.24   13   12 |    -456     480     22    133
ngs  202|    0     0     1    -5    10   -50  -.07   13    9 |    -905     -67   1070   2965
sio  328|    0     0     4    31    -5    44  -.19   14   11 |     ---     ---    ---    ---

Table 2.1820.5   GPS week: 1820   Day: 5   MJD: 56989.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  243|    0     0     0    34    16    -8   .05    9    9 |    -761      39     15    112
emr   80|    0     0     7    -4     4    31   .23   13   12 |    5353   -1960     16    176
esa  150|    0     0     4     0    17     9  -.37   13   13 |   -1235     770     10    142
gfz  196|   -1     1    -7    -3   -28    56   .17   12   12 |     618    -983     13    170
grg  169|    2    -3   -16   -59   -29   -24   .24   15   14 |     611    -439     15    178
igr  n/a|   -1     0    -1   -10    18    -2  -.19    5    4 |    3003   -1519     17     95
jpl   80|    1     0     7    -3    16   -46   .23   12   12 |    5398   -1955     17    134
mit  350|    2     0    -4   -23    11     8  -.24   12   11 |    -355    -272     19    147
ngs  199|   -1     0     2    27    -7   -26  -.07   15    7 |    -527    -316   1294   2991
sio  316|    0    -1     2   -23   -13    35  -.18   13   13 |     ---     ---    ---    ---

Table 2.1820.6   GPS week: 1820   Day: 6   MJD: 56990.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  242|    1     0     0    -5     9    21   .02    9    9 |    -986    -664     17    110
emr   80|    0     0     6   -14    -2    29   .23   14   13 |    3615    -836     16    175
esa  150|    1     0     3     3    30    17  -.32   13   13 |   -1480    1934     10    137
gfz  194|   -1     2    -6   -10   -23    47   .16   11    9 |    -438    -426     14    175
grg  170|    2    -1    -7     6    -1   -15   .24   15   15 |      45    -231     14    154
igr  n/a|   -1     0    -2   -13    30    -6  -.18    4    4 |    1655    -459     15     83
jpl   80|    0     0     6    -1    -8   -52   .21   12   12 |    3637    -825     16    136
mit  350|    0    -1    -5    23   -22     1  -.27   14   12 |    -769      25     21    152
ngs  200|    0     0     0    -5    12   -30  -.10   13    8 |    -939    -660   1801   3667
sio  321|    0    -1     2    14   -16   -19  -.18   13   11 |     ---     ---    ---    ---

       
       
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 3.1820.0   GPS week: 1820   Day: 0   MJD: 56984.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5   11   11   13   16    6   10   11    8   11    3 |    46   49   41   50   62   47   50   53   50   49    48
   2  |    7   10   11   13   14    4   12    8    7   15    3 |    26   24   22   32   30   23   22   25   28   25    24
  X3  |    1  ---  255  166  ---  298  ---  ---  ---  ---    0 |   258  ---    9  225  ---  314  ---  ---  ---  ---   256
   4  |   10   12   11   20   13    5   21   12   12   11    5 |    31   29   29   27   38   27   28   35   35   27    28
   5  |    6   11   15   13   15    4   12   10    8   14    4 |    42   49   45   34   39   39   49   39   38   43    41
   6  |    6   10   13    9   15    7   12    9    8    9    3 |    46   54   42   50   63   45   52   50   49   47    49
   7  |    8   10   13   10   18    6    9   21   10    9    4 |    28   29   20   24   30   22   28   19   25   22    22
  X8  |   17   11   13   13  ---    8   10   11   15  ---    5 |    25   24   21   19  ---   20   24   23   27  ---    21
  X9E |   11   21   18   15  111    9  ---   16   11   10    6 |  9999  899 9999 9999 9999 9999  ---  903  905  897  9999
  10  |   10    9   12   13   14    7    9    8    9   12    3 |    25   28   21   28   29   24   25   24   28   27    24
  11  |    7   12   15   12   19    5   10   13    8   11    4 |    53   57   48   58   71   53   57   62   55   60    56
  12  |    7   17    8   13   15    5   16   13    8   13    4 |    19   24   12   25   24   15   24   18   19   16    17
  13E |    5    9    8    8   23    6   13   11    6    9    3 |    34   38   26   32   46   30   36   30   32   36    32
  14E |    7   11    7    9   15    5   13   10    7    8    3 |    27   25   22   27   29   23   25   20   26   24    23
  15E |    9   14    8    9   22    5   16   11    9   11    4 |    37   36   32   37   36   34   35   38   37   39    35
  16  |   13   22    9   16   20    7   17   19   12   18    5 |    24   26   16   23   23   17   26   25   20   22    18
  17  |    8   13   11   10   19    4   14   11    9    9    4 |    24   29   17   24   34   20   26   24   25   25    23
  18  |    8   15   14   11   16    6   14   11    9   17    4 |    27   32   23   35   33   24   31   28   27   29    27
  19  |    8   20   10   15   21    5   13   13   11   12    4 |    24   32   18   30   31   18   27   25   23   21    22
  20  |   13   16   12   15   17    5   12   13   10   14    4 |    28   34   25   33   38   29   34   31   31   26    28
  21  |    7   12   11   11   14    4    9   11    9   15    4 |    28   25   27   31   30   24   22   25   29   26    25
  22  |    7   11   15    9   14    7   12   13    8   17    4 |    34   36   29   38   42   30   35   35   32   34    33
  23E |    8   14    8   12   17    5   13   21    9   10    4 |    54   54   51   54   51   50   51   62   49   57    53
  24  |    9   11   14    8   14    6   10    9    7   16    3 |    25   26   24   21   24   21   27   20   23   21    21
  25  |    7   12   14   11   12    4   14    9    6    8    3 |    21   26   26   22   21   18   25   17   19   19    20
  26E |   23   19   17   14   18    7   16   16   34   22    7 |    55   62   57   54   57   55   58   59   63   60    55
  27  |   15   12   12   13   19    5   11   15    9   14    4 |    32   29   29   23   27   20   25   25   23   32    24
  28  |    6   12    7   10   19    6   12   15    8   10    3 |    21   26   14   17   29   17   26   18   19   18    18
  29  |   10   17   11   11   13    5   16   19    7    9    4 |    24   30   21   24   21   18   28   17   22   19    19
  30  |    6   10   12   10   16    4   11   14    8    7    3 |    29   27   28   26   30   25   31   23   27   30    26
  31  |    9   14   14   13   23    5   10   22   11   13    5 |    27   33   20   31   38   22   30   18   26   22    23
  32  |    9   11   13    9   17    5   12   10    8    9    3 |    17   23   16   14   18   13   21   12   15   15    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   12   12   17    5   13   14   11   13      |T   38   61   26   37   36   36   32   58   58   59    36
 WRMS |    9   13   12   11   16    5   13   12    8   11      |NE  37   32   24   37   34   36   30   27   28   28    35
 MEDI |    8   12   12   12   16    5   12   12    9   11      |MD  28   29   24   30   31   24   28   25   27   26    24

Table 3.1820.1   GPS week: 1820   Day: 1   MJD: 56985.000                            

        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   12   11   12   18    6   11    9    6   13    4 |    30   38   29   31   44   32   38   33   33   31    32
   2  |    8    8   12   16   13    4   10    8    6   15    3 |    18   21   18   29   19   18   17   18   16   21    17
  X3  |    1  ---  --- >>>>  ---  175  ---  ---  ---  ---    0 |   954  ---  --- 9999  ---  264  ---  ---  ---  ---   951
   4  |    8   10   11   19   10    6    9   10    7    9    3 |    27   30   27   22   31   23   29   30   27   24    26
   5  |    8   12   15   12   13    4   13    9   10   15    4 |    29   39   32   30   31   28   38   30   28   33    30
   6  |    7   11   12    8    9    6   13   11    8   13    3 |    35   42   30   36   42   32   41   30   32   31    34
   7  |    9   12   11    9   16    4   14   15    8    9    4 |    24   29   18   23   27   19   27   17   22   18    20
  X8  |   11   14   14   15  ---    7   10   15   12  ---    5 |    28   31   31   28  ---   27   29   29   32  ---    27
  X9E |   12   16   16   17   31    7  ---   14   11   14    6 |  9999  923 9999 9999 9999 9999  ---  923  925  923  9999
  10  |    7   10   14   11   12    5    9    8    5   11    3 |    21   24   20   21   20   18   21   19   18   20    19
  11  |    8   12   15   14   17    5   11    9    7   16    4 |    38   46   37   40   53   38   45   42   40   45    41
  12  |    9   16    8   12   16    4   14   14   10   19    4 |    21   26   16   27   27   18   26   22   23   24    20
  13E |    6    9    7   10   16    3   12    7    9    9    3 |    38   41   34   38   44   34   38   37   34   39    36
  14E |    8   12    8   10   17    5   10    8    8    8    3 |    32   34   32   33   35   31   30   27   32   32    31
  15E |    9   16    9    7   24    4   16   13   12   21    5 |    32   29   25   31   27   27   28   33   31   32    28
  16  |   12   25   12   14   21    6   13   17   16   17    5 |    23   26   21   25   23   17   22   26   26   21    19
  17  |    7   12   10   10   16    4   13    9    7    8    3 |    24   27   18   24   32   20   25   22   23   24    22
  18  |   11   13   16    8   17    6   15   12   10   20    4 |    24   31   22   27   28   21   28   24   24   28    24
  19  |    8   18   10   15   23    5   14   14   14   13    5 |    19   30   18   26   29   17   24   22   23   19    19
  20  |   13   15   15   15   15    3   17   13   11   14    5 |    18   28   20   24   27   19   30   23   24   16    19
  21  |    8   11   12    9   14    4   12   12   12   15    4 |    20   23   22   22   23   18   19   20   23   25    19
  22  |    8   11   16    8   16    5   13   10   10   20    4 |    25   32   22   28   34   23   30   26   26   26    25
  23E |   10   13    7   10   17    3   13   18   10    9    4 |    47   45   41   45   41   42   44   52   46   46    44
  24  |   10   11   15    8   13    6   12   10   13   18    4 |    22   26   25   20   24   20   25   23   22   23    20
  25  |    8   11   14   10   12    4   12    8    8   11    3 |    25   29   29   26   25   22   28   21   23   27    24
  26E |   24   18   17   13   17    9   14   15   40   24    8 |    78   82   80   77   75   76   79   79   84   82    78
  27  |   10   11   13   13   17    6   11   16   11   16    4 |    28   31   29   25   25   21   26   29   23   32    25
  28  |    7   12    8   10   18    5   13   13    7   11    4 |    21   25   17   21   30   17   25   20   21   17    19
  29  |    9   14   10   10   15    6   15   18   10   12    4 |    19   29   21   20   21   18   25   24   22   21    18
  30  |    4    9   12   10   13    3   11    9    8   11    3 |    24   27   25   25   26   21   27   22   22   26    23
  31  |   10   12   12   13   21    4   13   23   18   11    5 |    27   30   22   30   35   22   29   17   28   20    23
  32  |    9   11   14   10   18    3    9    8    9    9    3 |    14   19   18   15   17   12   19   12   18   13    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   13   12   12   16    5   13   13   12   14      |T   57   61   26   28   31   32   30   56   57   57    56
 WRMS |    9   13   12   11   16    5   13   10    8   13      |NE  59   29   23   25   28   30   27   24   24   24    58
 MEDI |    8   12   12   10   16    5   13   12   10   13      |MD  25   30   22   26   28   21   28   24   24   25    24

Table 3.1820.2   GPS week: 1820   Day: 2   MJD: 56986.000                            

        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   13   12   18   12    5   14    7    7   10    4 |    32   39   32   33   46   36   44   39   39   39    36
   2  |    8   11   12   14   13    4   11    8    8   16    4 |    20   27   21   32   23   21   26   24   26   27    23
  X3  |    2  ---  ---  ---  ---  122  ---  ---  ---  ---    0 |   729  ---  ---  ---  ---  695  ---  ---  ---  ---   731
   4  |    8   13   13   18    5    5    7    9   10   11    4 |    18   25   22   20   26   19   23   25   24   22    20
   5  |    9   13   16   11   13    5   12    8   10   16    4 |    37   42   36   32   37   32   41   35   29   39    34
   6  |   10   12   13    8   11    6   11    9    8    9    3 |    36   46   34   39   48   36   45   36   45   41    40
   7  |   11   16   13   10   15    5    9   12    9    8    4 |    24   30   20   23   26   19   27   16   22   21    20
  X8  |   14   14   14   11  ---    8   11   12   11  ---    5 |    30   27   27   21  ---   25   31   27   26  ---    26
  X9E |   16   17   18   22   38   10  ---   14   16   16    7 |   930 9999  931  927  939  927  --- 9999 9999 9999   930
  10  |    9   10   14    8   14    5    8    7    7   11    3 |    23   29   20   25   23   22   27   25   25   27    23
  11  |    8   14   16   16   12    5   10    8    9   12    4 |    39   46   39   44   53   41   50   46   43   49    44
  12  |   11   17   10   10   14    4   17   10    8   13    4 |    22   28   19   28   29   20   29   24   26   23    23
  13E |    7   10    7    7   13    4   13   11    7    9    3 |    37   44   32   39   46   35   42   39   36   45    39
  14E |   10   11    8   11   11    4   10    9    9    9    3 |    27   24   23   32   26   23   24   22   25   25    24
  15E |    9   15   10    6   18    6   14   16   10   11    4 |    30   30   24   30   26   26   27   38   27   34    28
  16  |   13   15   12   13   18    5   12   14   10   15    4 |    23   22   18   24   23   15   21   23   18   20    18
  17  |   10   14   11    8   19    4   13   10    6   10    4 |    30   34   22   28   35   23   31   24   27   26    26
  18  |   13   14   17   12   14    7   14   10    9   18    4 |    25   31   24   39   31   25   29   28   22   30    26
  19  |   10   20   14   16   19    5   14    9   12   13    5 |    19   28   21   27   29   15   25   22   20   22    20
  20  |   15   13   16   13   16    3   12   11   12   13    4 |    22   30   25   25   29   23   31   28   30   24    24
  21  |    8   10   14   10   11    5    9   12    9   11    3 |    19   21   22   29   24   21   20   21   23   24    20
  22  |   11   12   17    8   14    5   11   10   15   19    4 |    29   35   26   37   39   26   34   31   27   33    29
  23E |   12   14    8   11   12    5   14   16    9   10    4 |    42   38   34   39   39   36   35   41   36   39    37
  24  |   10   15   16    8   12    5   13    8    8   18    4 |    23   29   27   24   27   22   28   24   23   28    24
  25  |    9   15   15   11   10    3   12    8    9   10    4 |    25   26   30   29   24   21   25   21   23   27    23
  26E |   23   21   18   12   16    7   16   17   41   21    8 |    79   78   80   77   77   72   77   71   80   75    74
  27  |   12   16   16   14   16    8   12   12    8   19    5 |    29   29   32   24   29   21   28   28   21   34    25
  28  |    7   15    9   10   17    4   12   10    7   11    3 |    22   30   16   19   29   17   26   22   19   25    21
  29  |   11   19   13   12   16    5   16   16   12   13    5 |    27   32   27   33   28   26   31   27   28   28    26
  30  |    7   11   13    9   12    4   11   10    6    8    3 |    24   28   27   23   26   22   27   24   22   27    24
  31  |   12   13   14   12   21    5   11   23   15   13    5 |    23   29   19   31   36   21   28   18   26   24    22
  32  |   11   10   16    9   14    4    8    7    7    9    3 |    20   24   21   17   18   14   20   11   16   16    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   14   13   12   14    5   12   11   12   13      |T   78   32   56   59   63   74   31   28   28   30    77
 WRMS |   10   14   13   11   14    5   12   10    8   12      |NE  52   30   25   28   30   49   29   25   26   28    52
 MEDI |   10   14   14   11   14    5   12   10    9   11      |MD  25   29   25   29   29   23   28   25   26   27    24

Table 3.1820.3   GPS week: 1820   Day: 3   MJD: 56987.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   10   10   10   13   12    6    9    9   10   11    3 |    32   41   35   40   45   36   40   40   43   36    37
   2  |    9    9   12   23   15    5   10   14   12   13    4 |    23   23   24   39   22   22   21   23   22   24    22
  X3  |   31  ---  116   39  ---  153  ---  ---  ---  ---   35 |   560  ---  415 9999  ---  454  ---  ---  ---  ---   544
   4  |   11    8   12   18   10    6    7    9   11   11    4 |    26   29   30   29   31   26   28   31   32   23    27
   5  |    9   13   16   14   13    5   10   12   11   16    4 |    43   45   43   31   36   37   45   36   37   39    39
   6  |   15   11   11    8   13    6   11    9   11   11    4 |    34   47   38   45   51   38   46   44   43   40    41
   7  |   13    8   16   13   17    6   12   15   11   10    4 |    28   24   25   26   26   19   26   14   20   13    19
  X8  |   13   11   17   16  ---    8   11   14   13  ---    5 |    28   28   30   28  ---   26   28   26   24  ---    25
  X9E |    4  ---  226  162  265  203  ---  ---  ---  ---    0 |  9999  --- 9999 9999 9999 9999  ---  ---  ---  ---  9999
  10  |   13    8   15   13   14    5    7    9   13   12    4 |    23   27   24   27   26   24   25   24   28   23    23
  11  |   11   11   15   14   16    6    8    9   10   12    4 |    42   53   46   50   57   46   50   51   52   49    48
  12  |   13   15    7   12   18    5   17   15   15   15    5 |    21   23   17   26   26   17   26   20   24   18    19
  13E |    7   15    9   11   13    4    9    8   11    9    3 |    41   40   38   41   45   36   40   35   36   35    38
  14E |   10   10    9   11   13    6    9   12    8   12    3 |    36   36   34   34   36   35   35   34   33   33    34
  15E |    9   13   10    9   17    6   14   17   12   17    4 |    32   29   25   29   28   25   28   36   31   33    28
  16  |   11   18   13   15   19    7   11   18    9   17    5 |    23   23   22   24   22   17   22   23   22   16    17
  17  |   11   11   10    9   21    3   15   10   10    8    4 |    28   29   21   27   35   20   28   24   25   22    24
  18  |   10   13   16   12   12    6   14   14   15   16    4 |    29   31   27   34   30   25   32   25   33   27    28
  19  |   10   14   10   18   18    4   14   11   12   12    4 |    18   28   21   27   27   17   25   22   20   15    19
  20  |   15   10   15   14   14    5   12   12   11   15    4 |    21   28   24   28   26   23   29   26   27   21    22
  21  |   10   10   14    8   12    4   10   15   10   16    4 |    25   24   25   27   22   21   22   24   26   22    22
  22  |    8   10   15   11   13    7   11   13   11   16    4 |    31   33   28   34   36   28   34   32   32   25    30
  23E |   14   12   15   12   16    4   11   16   12   13    4 |    62   57   60   59   59   58   55   57   59   56    57
  24  |   11   12   16    8   14    5   10   13   12   19    4 |    23   24   26   20   25   19   24   20   23   18    20
  25  |   11   10   13   10   12    4   11   11   11    9    4 |    22   27   28   22   24   20   26   19   22   25    23
  26E |   22   21   19   19   17   11   15   19   44   20    8 |   102  101  100   94   98   98   96   96  100   96    96
  27  |   16   14   14   12   15    5   10   19    8   11    4 |    31   26   31   24   22   21   27   25   20   24    23
  28  |   11   12    8   13   20    5   10   13    9   11    4 |    27   27   21   21   31   20   25   21   22   18    21
  29  |   11   16   11   11   14    5   12   17   11   10    4 |    30   36   29   28   27   28   34   28   30   27    27
  30  |    9   10   16   10   15    4   11    8    6    8    3 |    27   28   32   25   28   22   27   23   23   21    25
  31  |   11   13   13   13   21    6   10   23   10   13    5 |    26   29   20   27   36   20   28   19   19   16    20
  32  |   11    8   12   11   13    5    7    9    7    9    3 |    18   21   19   16   15   13   18    9   15   10    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   12   12   13   13   15    6   11   14   13   13      |T   48   33   43   32   34   42   33   30   31   28    46
 WRMS |   11   12   13   12   15    5   11   12   10   13      |NE  47   30   42   29   30   40   29   25   27   23    45
 MEDI |   11   11   13   12   14    5   11   13   11   12      |MD  28   28   28   28   28   24   28   25   26   24    25

Table 3.1820.4   GPS week: 1820   Day: 4   MJD: 56988.000                            

        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   11   22   16    5   10    7    9   11    4 |    36   41   32   34   50   35   40   40   37   35    36
   2  |    8    8   14   14   11    8   10   13   10   14    4 |    17   21   19   28   23   18   21   20   19   17    18
  X3  |   21  ---  107   36  ---   97  ---  ---  ---  ---   27 |   642  ---  382 9999  ---  596  ---  ---  ---  ---   644
   4  |    7    9   11   14   14    6    8    9    8   11    3 |    27   30   27   25   34   24   29   30   27   24    26
   5  |    9   12   17   11   12    6   12    9   11   18    4 |    37   45   42   33   34   36   45   35   35   41    37
   6  |    9   10   14    8   13    6   11    9   10   13    3 |    37   46   34   43   51   35   43   41   37   40    39
   7  |   10    9   12   12   22    5   11   16   10   13    4 |    27   27   23   27   29   22   28   17   27   15    21
  X8  |    9   12   13   14  ---    5   10   13   11  ---    4 |    24   28   28   26  ---   24   24   25   27  ---    24
  X9E |   10   14   15   12   30    5  ---   11   14   11    5 |   930 9999  926  938  920  935  --- 9999 9999 9999   928
  10  |    8   10   14   10   15    6    7   10    9   14    3 |    22   24   23   26   27   19   23   24   25   23    22
  11  |    8   10   18   13   19    5    9    8   11   10    4 |    45   51   43   48   58   44   50   49   41   45    46
  12  |   10   16   11   11   19    6   15   17   11   19    5 |    20   27   18   26   30   18   25   25   24   21    20
  13E |    6   14    8   10   13    5   10    7   11    7    3 |    37   40   34   39   41   34   40   35   35   36    36
  14E |    7   10    8    9   14    6   12   11   10   11    3 |    23   23   23   29   26   22   25   18   25   26    22
  15E |    9   17   10   11   17    5   16   18    9   18    5 |    27   27   20   31   21   24   28   34   28   34    26
  16  |    8   16    9   15   21    4   13   12   10   14    4 |    26   28   23   28   29   21   25   23   24   20    23
  17  |    7   12   11    9   18    5   13   12    9    8    4 |    28   30   20   28   35   22   30   26   28   22    25
  18  |    8   13   15   14   13    9   14   12   10   16    4 |    25   32   24   39   30   25   33   29   24   24    27
  19  |   10   15   11   18   21    4   14   11   11   14    5 |    22   29   20   33   28   20   26   22   21   21    21
  20  |   10   14   15   13   14    5   12   12   11   13    4 |    26   31   27   26   32   23   31   26   27   22    25
  21  |    9   12   13    9   11    6   10   14   11   16    4 |    16   22   18   23   23   19   20   21   21   19    17
  22  |    7   12   14   10   15    6   12   10   11   16    4 |    31   38   27   39   38   29   38   33   34   32    33
  23E |    6   11    8   12   16    4   15   14    8   11    4 |    50   49   46   46   48   44   45   49   46   47    47
  24  |    9   13   15   10   15    6   11   14    7   19    4 |    22   29   27   24   25   22   26   25   25   27    23
  25  |    8   12   14   14   13    5   10   11   15   10    4 |    22   29   29   24   26   21   26   18   26   22    23
  26E |   25   29   15   18   15   11   17   16   46   27    9 |    85   94   87   89   88   87   85   89  102   87    87
  27  |   11   10   15   12   17    7   10   12   11   16    4 |    25   23   29   23   27   20   25   23   23   28    23
  28  |    7   10   10   11   19    6   14   14    7   11    4 |    24   28   22   22   32   19   28   24   22   20    22
  29  |    9   15   11   12   19    5   14   17   13   12    4 |    81   82   83   82   78   81   82   83   77   80    80
  30  |    7    9   14   12   13    4   10    7    8    7    3 |    26   29   31   26   28   23   30   23   27   24    25
  31  |    9   15   13   11   22    7   10   22    9   11    4 |    28   34   25   31   39   25   29   20   26   23    25
  32  |    7    7   13   11   15    5    9   12    6    9    3 |    18   23   22   20   21   16   20   14   19   16    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   13   13   16    6   12   13   13   14      |T   78   35   69   63   65   75   34   31   31   30    77
 WRMS |    9   13   13   12   15    6   12   12    9   11      |NE  52   33   42   31   34   48   31   28   28   27    51
 MEDI |    8   12   13   12   15    5   11   12   10   13      |MD  26   29   27   28   30   23   28   25   27   24    25

Table 3.1820.5   GPS week: 1820   Day: 5   MJD: 56989.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5   10   12   14   14    5   10    8    5    9    3 |    29   35   26   33   38   28   36   31   26   29    29
   2  |    8    8   14   19   14    4    9   11    8   15    4 |    20   20   21   33   24   19   21   22   20   19    19
  X3  |   20  ---   99   43  ---   26  ---   23   18  ---   14 |   438  ---  323 9999  ---  457  ---   73   79  ---   443
   4  |    8    7   10   16   11    6    7   13    8   13    3 |    26   22   22   21   25   20   24   22   20   17    20
   5  |    7   12   17   13   13    4   12   10    8   13    4 |    30   33   32   27   31   27   36   24   30   29    28
   6  |    7   10   15    8   11    5   12    9    8   13    3 |    35   43   32   39   48   33   41   40   33   38    36
   7  |   10   10   12   14   16    4   10   18    7   11    4 |    28   26   22   27   28   19   26   16   24   16    20
  X8  |    8   10   12   11  ---    6    8   10    7  ---    3 |    24   26   20   19  ---   20   25   24   21  ---    21
   9E |    7   11   15   12   15    5   12    8    8    8    3 |  9999  963 9999 9999 9999 9999   37  967  965  966  9999
  10  |    8    9   13   10   13    4    8    9    6   13    3 |    26   23   25   28   29   21   25   26   22   25    23
  11  |    6    9   18   13   14    5    9    9    8   11    3 |    34   40   33   38   45   33   39   38   32   38    35
  12  |   12   17    9   12   20    5   19   15    9   18    5 |    22   25   17   26   29   16   26   22   21   20    19
  13E |    7   12    8    9   15    5   11    7    8   12    3 |    32   35   29   33   37   29   34   29   31   31    31
  14E |    7   11    8    9   12    4   11    8   10   14    3 |    33   31   30   34   30   30   30   27   32   31    30
  15E |    8   13    9   11   18    4   16   16    9   13    4 |    28   26   23   30   26   22   28   31   28   25    25
  16  |   10   15    9   12   16    4   13   10    8   13    4 |    22   19   17   24   24   17   21   19   19   17    17
  17  |    7   12   10   10   15    4   14   12    9    9    3 |    27   27   18   26   34   20   26   25   23   21    23
  18  |    9   13   17   15   11    5   13   12   10   17    4 |    26   28   24   40   30   25   31   25   24   29    26
  19  |    9   16   11   17   18    4   15   11   11   12    4 |    18   25   16   29   27   16   23   17   20   17    17
  20  |   13   14   16   13   13    3   11   11    9   14    4 |    25   27   23   27   27   21   29   24   24   21    21
  21  |    9   11   15   11   10    4   11   16    9   14    4 |    22   21   22   26   22   19   20   24   21   22    19
  22  |    6   12   14    9   12    4   11    8    8   13    3 |    30   34   27   34   37   27   34   30   30   27    29
  23E |    6   11    8   10   19    4   11   11    8   10    3 |    52   52   50   52   56   49   47   46   52   49    50
  24  |   10   10   14    9   16    5   10    9    9   18    4 |    21   21   25   23   25   17   22   17   22   16    19
  25  |    8   11   14    7   13    4    9    9    5   10    3 |    25   25   29   21   25   19   25   18   20   21    21
  26E |   26   27   14   18   24   15   18   16   72   23    8 |    82   81   79   79   73   77   76   71   99   75    76
  27  |   12   13   15   14   12    5    9    9    7   12    4 |    27   26   27   23   23   18   23   21   20   24    22
  28  |    7   12   10   11   18    5    9   16    8   12    4 |    27   23   21   22   32   18   23   24   20   19    21
  29  |    8   15   10    9   12    4   13   16   10   11    4 |    65   66   63   62   66   64   65   64   64   64    63
  30  |    7    9   13   12   12    3    9    7    5    7    3 |    29   27   29   28   29   22   28   23   23   22    25
  31  |    9   15   13   11   20    4   11   23    9   14    5 |    25   30   19   29   35   20   29   21   24   20    21
  32  |    8    7   14   11   15    5    6   16    5    9    3 |    21   18   21   18   17   15   20   16   16   16    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   13   12   15    5   12   12   15   13      |T   43   61   37   31   33   39   31   58   59   58    40
 WRMS |    9   12   13   12   14    4   12   11    7   13      |NE  43   28   36   28   31   39   28   27   26   24    40
 MEDI |    8   11   13   11   14    4   11   11    8   13      |MD  27   27   25   28   29   21   28   24   24   22    23

Table 3.1820.6   GPS week: 1820   Day: 6   MJD: 56990.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   10   11   13   12   15    4   11   10    8   15    4 |    41   46   38   50   57   44   46   49   46   42    44
   2  |    9    9   14   15   12    4    8   12   10   14    4 |    22   22   22   35   26   23   23   28   27   25    24
  X3  |   29  ---   58   32  ---   34  ---   28   54  ---   21 |   702  ---  411 9999  ---  658  ---   76   89  ---   703
   4  |    9    9   10   11   12    5    8   18    7   13    3 |    25   27   25   32   35   27   26   35   27   27    27
   5  |    7   12   16   10   11    4   12   11   10   14    4 |    45   49   49   40   40   42   50   38   44   46    44
   6  |    6   11   14    7   11    4   10   10    7   11    3 |    45   53   45   52   61   46   54   55   49   48    49
   7  |    9   11   11   10   17    5   12   19    9   12    4 |    25   27   21   25   27   19   27   18   23   20    20
  X8  |   11   12   13   13  ---    6   13   12    9  ---    5 |    24   27   23   21  ---   21   27   23   25  ---    22
   9E |    6   11   14   11   15    4   10    7    7    7    3 |  9999  918 9999 9999 9999 9999   33  917  916  918  9999
  10  |    6    8   13    6   11    4    9   10    5    9    3 |    20   21   21   26   28   20   23   27   23   23    22
  11  |    8   10   17   12   16    4    9   12    6   11    4 |    51   55   48   59   65   54   54   59   52   55    54
  12  |   10   18   12   12   16    4   17   15    8   17    5 |    20   25   17   24   28   16   26   20   18   16    18
  13E |    6   11    8    8   10    5   11   10    9    8    3 |    30   33   27   29   33   27   32   28   28   28    28
  14E |    8   13    6    8   13    4   10    9    7    9    3 |    39   36   35   41   37   36   36   36   38   40    37
  15E |    7   15    7    9   20    4   18   13   11   11    4 |    32   31   23   35   29   26   28   36   33   33    30
  16  |   10   15    8   12   16    3   13   12    9   14    4 |    26   26   22   25   27   21   26   20   22   22    22
  17  |    8   16   12    9   17    4   12   15    8   11    4 |    25   26   18   29   36   21   26   27   24   26    24
  18  |   10   12   14   13   15    4   13   11    8   16    4 |    25   28   25   40   32   24   29   26   22   26    26
  19  |    9   21   11   17   21    3   13   16   10   13    5 |    21   26   18   35   27   18   23   21   20   22    20
  20  |   13   14   15   12   13    4   12   13    9   13    4 |    24   28   24   27   33   24   28   28   27   20    24
  21  |    9   11   13    9   12    5   10   15    7   13    3 |    23   21   26   32   29   24   23   28   22   25    23
  22  |    8   14   14    9   14    6   10   10    8   15    4 |    32   35   28   38   40   29   35   34   29   29    31
  23E |    4   10    8   13   14    3   12   14    6    8    3 |    50   50   49   55   48   49   51   49   51   48    49
  24  |   10    8   15    6   14    3   10   12    7   15    3 |    23   25   28   22   25   19   26   19   20   19    21
  25  |    5   10   14    7   14    3   10   11    8    8    3 |    22   27   30   23   25   21   25   19   22   24    23
  26E |   22   37   18   11   21    8   24   25   57   29   10 |    67   67   62   64   66   64   61   57   90   61    62
  27  |   10   11   14   12   16    6    9    6    9   11    4 |    26   26   29   24   25   19   24   21   21   25    23
  28  |    7   11   11    9   19    4   11   14    8   13    4 |    24   23   21   23   32   19   22   23   21   19    20
  29  |    9   17    9    9   14    4   17   17   10   12    4 |    59   60   57   61   64   58   62   56   55   57    57
  30  |    6    9   11    9   12    4    9    8   10    7    3 |    26   27   27   27   28   21   28   24   22   25    25
  31  |    9   16   13   10   21    5   10   23   10    9    4 |    28   29   22   31   39   22   28   24   28   24    24
  32  |   10    9   12   10   14    4    6   19    7   14    4 |    16   17   17   17   16   12   16   19   14   19    12
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   14   13   11   15    4   12   14   13   13      |T   52   61   42   34   36   49   32   60   60   60    51
 WRMS |    9   13   13    9   15    4   12   12    8   11      |NE  54   31   42   32   35   50   31   31   30   28    53
 MEDI |    9   11   13   10   14    4   11   12    8   12      |MD  26   27   26   31   32   24   28   28   27   25    24



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 4.1820   GPS week: 1820   MJD: 56984.0-56990.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3056 |U    5     5    15 |U    9    12    32 |U    6     6    14 |
emr | emr 2958 |     9     6    19 |U   11    13    34 |     8     7    19 |
esa | esa 3044 |     6     6    19 |U    9    13    34 |     7     7    19 |
gfz | gfz 3052 |U    6     5    16 |U    9    12    41 |U    7     7    16 |
grg | grg 2879 |    10     8    22 |U   11    14    35 |U    8     8    19 |
igr | igr 3000 |     6     5    16 |     9    12    33 |     6     7    15 |
igs | igs 3022 |     6     5    17 |     9    12    33 |     7     7    16 |
jpl | jpl 2902 |     7     7    19 |U   10    13    36 |U    8    10    17 |
mit | mit 2989 |     8     8    21 |U   10    14    40 |U   10     9    18 |



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 5.1820.0   GPS week: 1820   Day: 0   MJD: 56984.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3065 |     5     4    16 |     6    11    25 |     7     6    13 |
emr | emr 2972 |    12     8    30 |    10    13    23 |     9     8    19 |
esa | esa 3072 |     5     5    19 |     7    14    27 |     8     6    20 |
gfz | gfz 3068 |     7     7    17 |     6    11    24 |     8     6    16 |
grg | grg 2879 |     9     6    22 |    10    12    27 |     8     7    20 |
igr | igr 2976 |     5     5    18 |     6    12    23 |     7     6    14 |
igs | igs 3011 |    10     6    31 |     7    12    24 |     7     6    15 |
jpl | jpl 2868 |    11    10    23 |     7    13    30 |     9     8    18 |
mit | mit 2976 |    10     9    36 |     7    13    24 |     8     6    17 |

Table 5.1820.1   GPS week: 1820   Day: 1   MJD: 56985.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9     8    26 |     7     7    20 |     5     6    16 |
emr | emr 2972 |    13     8    28 |     7     7    19 |     7     5    20 |
esa | esa 2976 |    10     7    27 |     7     8    22 |     6     4    21 |
gfz | gfz 3052 |    10     6    29 |     6     9    23 |     6     6    21 |
grg | grg 2880 |    15    11    36 |     9    10    22 |     6     6    21 |
igr | igr 2976 |    10     7    27 |     6     7    21 |     6     5    18 |
igs | igs 2974 |    10     7    26 |     6     7    19 |     6     5    19 |
jpl | jpl 2876 |     9     7    30 |     7     8    20 |     8     8    17 |
mit | mit 2976 |    12     9    28 |     6    11    22 |     7     7    18 |

Table 5.1820.2   GPS week: 1820   Day: 2   MJD: 56986.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     5     4    14 |    12    15    36 |     7     6    13 |
emr | emr 2972 |     9     5    19 |    17    16    40 |     8     7    19 |
esa | esa 2976 |     6     5    18 |    14    16    41 |     7     7    16 |
gfz | gfz 2973 |     7     5    14 |    15    14    40 |     8     7    16 |
grg | grg 2880 |    15    11    18 |    16    15    40 |     8     7    17 |
igr | igr 2976 |     7     4    16 |    13    14    37 |     7     7    14 |
igs | igs 2974 |     7     4    13 |    14    15    38 |     7     6    16 |
jpl | jpl 2876 |     8     6    21 |    16    15    39 |     7    10    15 |
mit | mit 2976 |    10     9    14 |    16    21    53 |     9     8    15 |

Table 5.1820.3   GPS week: 1820   Day: 3   MJD: 56987.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3065 |     3     3    11 |     9    16    39 |     7     6    15 |
emr | emr 2876 |     8     5    16 |     8    15    35 |     8     7    22 |
esa | esa 3072 |     5     4    16 |     8    15    35 |    11     8    25 |
gfz | gfz 3068 |     5     5    12 |     9    15    84 |     8     6    16 |
grg | grg 2880 |     8     4    16 |    10    17    39 |    10    11    19 |
igr | igr 2942 |     5     3    13 |     8    15    39 |     6     7    17 |
igs | igs 3018 |     4     3    13 |     8    16    40 |     7     7    17 |
jpl | jpl 2876 |     6     6    16 |     9    16    43 |     8    10    18 |
mit | mit 2880 |     5     4    12 |     9    16    40 |    11    13    16 |

Table 5.1820.4   GPS week: 1820   Day: 4   MJD: 56988.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |     4     6    11 |    11    10    40 |     6     7    15 |
emr | emr 2972 |     8     6    13 |    12    11    44 |     8     8    17 |
esa | esa 3072 |     7     7    17 |    10    11    38 |     6     7    16 |
gfz | gfz 3068 |     5     4    11 |    10    10    44 |     7     8    16 |
grg | grg 2880 |     8    10    23 |    12    11    44 |     8     7    17 |
igr | igr 3025 |     5     5    11 |    11    11    44 |     7     7    15 |
igs | igs 3050 |     5     5    11 |    11    11    42 |     7     7    16 |
jpl | jpl 2874 |     6     6    14 |    11    11    43 |     7    10    18 |
mit | mit 2976 |     6     7    20 |    12    14    69 |     8    10    16 |

Table 5.1820.5   GPS week: 1820   Day: 5   MJD: 56989.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |     5     6    14 |     8    13    29 |     7     8    16 |
emr | emr 2972 |     7     6    14 |    10    16    37 |     9    10    18 |
esa | esa 3072 |     6     7    18 |     8    14    34 |     7     9    17 |
gfz | gfz 3068 |     6     6    13 |     7    13    36 |     7    10    14 |
grg | grg 2880 |     8     9    17 |     9    15    36 |     9    10    21 |
igr | igr 3058 |     5     5    14 |     8    13    31 |     7     9    13 |
igs | igs 3065 |     5     5    14 |     8    14    33 |     7     9    14 |
jpl | jpl 2972 |     6     5    16 |     9    15    38 |     9    14    19 |
mit | mit 3072 |     7     8    19 |     8    12    32 |    15    14    29 |

Table 5.1820.6   GPS week: 1820   Day: 6   MJD: 56990.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     4     6    16 |    12    13    35 |     6     5    10 |
emr | emr 2972 |     7     6    16 |    14    16    39 |     7     7    16 |
esa | esa 3072 |     7     6    16 |    12    15    41 |     7     7    16 |
gfz | gfz 3068 |     5     4    15 |    12    15    38 |     7     8    16 |
grg | grg 2880 |     7     8    19 |    12    17    38 |     9     8    15 |
igr | igr 3052 |     6     6    16 |    12    14    38 |     7     7    14 |
igs | igs 3065 |     5     5    15 |    12    13    38 |     7     7    13 |
jpl | jpl 2972 |     6     5    14 |    13    14    42 |     8     9    16 |
mit | mit 3072 |     5     8    16 |    12    14    39 |    10     9    17 |


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 6.1820   GPS week: 1820   MJD: 56984.500-56990.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       3      11    -115      27     -6 |      24     29
            |      40      11      54     145      3 |       2
emr   uuuuu |       2       3      61      40    -17 |      43     47
            |      38      12      47      83     10 |       5
esa   uuuuu |      -2      14     -20      42     -4 |      23     28
            |      25      15      47      71      7 |       2
gfz   uuuux |       7     -17     111    -179     63 |     -29     54
            |      36      26      93     122     17 |      20
grg   uuuuu |      -8      19    -157     -26      3 |      21     26
            |      18      28      74      93      8 |       2
igr   xxxxx |     -16      10      18      35     -2 |       6     18
            |       5      27     128      51      3 |       2
irf   xxxxx |       5       1       1      38      1 |       7     17
            |       9       6      21      21      2 |       2
jpl   uuuuu |     -12      12       4      22     -6 |      33     38
            |      22       9     137      80      9 |       3
mit   uuuuu |       0      -4     -17      40      4 |      17     23
            |      32      11      63      52      2 |       3
ngs   uuuuu |      16     -26     114      32      3 |      10     18
            |      35      40     131     104      2 |       3
sio   uuxxx |     -12      -5      -3      44     -6 |      47     50
            |      25      20      85      80      9 |       3


Table 7.1820.0   GPS week: 1820   Day: 0   MJD: 56984.500

                                                         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      15    -103     133    -10 |      21     27
emr   uuuuu |      17      22      79     111    -23 |      45     48
esa   uuuuu |     -26      -3      -7     -76    -11 |      22     25
gfz   uuuux |     -37     -63     298    -397     87 |     -60     61
grg   uuuuu |      -5      -7     -51      14     -6 |      18     23
igr   xxxxx |     -14     -39     236     -62     -2 |       2     16
irf   xxxxx |      16      -8       4      39      0 |       2     13
jpl   uuuuu |       0      -1      82     -56      7 |      30     35
mit   uuuuu |      44     -19    -107      93      2 |      12     17
ngs   uuuuu |       2      56    -109      84      5 |       4     11
sio   uuxxx |       0     -33     108      11      3 |      43     45

Table 7.1820.1   GPS week: 1820   Day: 1   MJD: 56985.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       2      17    -163      95     -6 |      24     28
emr   uuuuu |      51       4      74      84    -27 |      47     49
esa   uuuuu |     -10       7     -35      35    -11 |      23     27
gfz   uuuux |     -31     -39     165    -260     80 |     -48     57
grg   uuuuu |     -11     -13    -160     -63     -2 |      21     24
igr   xxxxx |     -18     -13     122      13     -4 |       6     16
irf   xxxxx |      15       1       0      -5      0 |       6     14
jpl   uuuuu |      -7      26     211     -40     -3 |      34     39
mit   uuuuu |      25      -2     -49     -47      2 |      15     20
ngs   uuuuu |     -22     -21     -13     119      7 |       8     14
sio   uuxxx |      10      18     -30     -80     -3 |      47     48

Table 7.1820.2   GPS week: 1820   Day: 2   MJD: 56986.500

                                                         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 |     -19      27     -54      85     -9 |      28     32
emr   uuuuu |      53      -2       9     123     -8 |      49     51
esa   uuuuu |     -11      30      76      47     -8 |      26     29
gfz   uuuux |     -23      -2     104    -199     67 |     -35     57
grg   uuuuu |     -27       8    -196    -126     -1 |      24     28
igr   xxxxx |     -23      15      -3      54     -6 |      10     19
irf   xxxxx |       9      -2      32      40      3 |      10     18
jpl   uuuuu |     -24      10    -151     -24     -1 |      38     43
mit   uuuuu |      25     -13      31      49      8 |      20     25
ngs   uuuuu |      10     -49     122      14      4 |      13     20
sio   uuxxx |      16       2      -3      11      4 |      51     53

Table 7.1820.3   GPS week: 1820   Day: 3   MJD: 56987.500

                                                         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 |      89      -3     -32     227     -8 |      25     32
emr   uuuuu |     -27       8       4     -36    -28 |      47     50
esa   uuuuu |      51      38     -71     163      9 |      24     30
gfz   uuuux |      23     -24      68     -44     63 |     -28     52
grg   uuuuu |     -31      19    -174    -152     -1 |      22     28
igr   xxxxx |     -11      32      38      92     -3 |       8     21
irf   xxxxx |       5       5     -20      37      1 |       9     19
jpl   uuuuu |     -40      20       5     -14     -3 |      36     43
mit   uuuuu |       0      11     -51       5      4 |      19     25
ngs   uuuuu |     -25     -68     177    -181      3 |      12     21
sio   uuxxx |     -49      14    -150      33    -16 |      49     52

Table 7.1820.4   GPS week: 1820   Day: 4   MJD: 56988.500

                                                         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 |     -13      15    -171    -176     -7 |      22     28
emr   uuuuu |     -34     -20      58    -107    -21 |      42     45
esa   uuuuu |       0      -1     -21      26     -2 |      22     28
gfz   uuuux |      55       5      48     -58     57 |     -20     53
grg   uuuuu |      19      37    -251     101     10 |      19     25
igr   xxxxx |      -9      14     -41      78      3 |       5     18
irf   xxxxx |      -8      -2     -32      44     -1 |       7     17
jpl   uuuuu |      12       4      67     174    -11 |      33     38
mit   uuuuu |     -32       5     -47      21      3 |      18     24
ngs   uuuuu |      35     -41     276     125      4 |      11     20
sio   uuxxx |     -34       3     -52     178    -19 |      48     51

Table 7.1820.5   GPS week: 1820   Day: 5   MJD: 56989.500

                                                         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 |     -28       0    -138     -98     -1 |      22     28
emr   uuuuu |     -18       6      57      50    -13 |      39     42
esa   uuuuu |      -1      16     -37      71     -9 |      22     28
gfz   uuuux |      36      -1      37    -160     41 |     -10     51
grg   uuuuu |       8      71    -204      54     16 |      21     27
igr   xxxxx |     -18      33    -108      33     -2 |       6     18
irf   xxxxx |       2      11       5      44      0 |       8     18
jpl   uuuuu |     -37       8      -3      58    -15 |      31     36
mit   uuuuu |     -28       1      38      54      4 |      19     24
ngs   uuuuu |      69     -40     153      19      1 |      12     21
sio   uuxxx |     -29      -7      42      58     -8 |      47     50

Table 7.1820.6   GPS week: 1820   Day: 6   MJD: 56990.500

                                                         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 |     -13       8    -148     -76     -3 |      22     28
emr   uuuuu |     -30       0     142      56     -1 |      35     40
esa   uuuuu |     -17      14     -45      26      1 |      21     28
gfz   uuuux |      23       4      58    -136     45 |      -3     47
grg   uuuuu |      -8      21     -65      -8      3 |      23     27
igr   xxxxx |     -16      28    -120      36     -2 |       5     19
irf   xxxxx |      -2       4      16      64      5 |       8     18
jpl   uuuuu |      12      14    -185      54    -17 |      29     36
mit   uuuuu |     -31      -9      68     105      7 |      19     25
ngs   uuuuu |      43     -18     192      46      0 |      12     21
sio   uuxxx |       1     -29      65      98     -4 |      46     49



More information about the IGSREPORT mailing list