[IGSREPORT-26149] Wk 2018 IGS Final Orbits

acc acc at igs.org
Thu Sep 27 23:12:15 PDT 2018


Author:  AC Coordinator / GA MIT 

sum-file Version 2.0
Final IGS Orbit Combination - Week 2018   (Sep 09, 2018 - Sep 15, 2018)

Contacts: acc at igs.org


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

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

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

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

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

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

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


SOFTWARE:
---------

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

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

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

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

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


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

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

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

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



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

igs2018[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs2018[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs2018[0-6].cls  IGS GPS clock combination summary report.
igs20187.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs20187.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   | KOKB MGUE NAUR OUS2 TIXI KOKB MGUE NAUR OUS2 TIXI
                0  |  ESA   | 19 22 22 LAUT LHAZ MAL2 WIND LHAZ
                0  |  GFZ   | 18 18 GODE KOKV NRIL POHN GODE NRIL POHN
                0  |  GRG   | 13 13 ADIS ADIS DARW NRIL
                0  |  JPL   | LAUT
                0  |  MIT   | ALBH BAKE CHPI CHUR FAA1 HOB2 NRC1 SCH2 SUTH TONG
                0  |  MIT   | WAB2 ALBH BAKE CHPI CHUR FAA1 HOB2 NRC1 SCH2 SUTH
                0  |  MIT   | TONG WAB2
                1  |  COD   | NAUR MGUE NAUR NICO
                1  |  EMR   | GRAZ THTI
                1  |  ESA   | 18 22 18 LAUT MAL2 MAW1 NICO WIND MAL2 MAW1 NICO
                1  |  GFZ   | 18 18 ABPO BJFS BRAZ CCJ2 CHTI CRO1 DAEJ FAA1 GODE
                1  |  GFZ   | HARB HRAO HYDE KOKB KRGG MAL2 MKEA NICO NRIL PARC
                1  |  GFZ   | PETS PIMO REUN STHL SUTH SUWN SYOG TWTF YAKT ZAMB
                1  |  GFZ   | ABPO ALIC ASPA AUCK BJFS BRAZ CAS1 CCJ2 CEDU CHPI
                1  |  GFZ   | CHTI CNMR COCO CORD CRO1 DAEJ DARW DGAR FAA1 GLPS
                1  |  GFZ   | GODE HARB HOB2 HRAO HYDE IISC INEG INVK IRKJ KARR
                1  |  GFZ   | KERG KOKB KOKV KOUC KOUR LHAZ MAG0 MAL2 MANA MAS1
                1  |  GFZ   | MAW1 MCM4 MKEA NICO NIST NIUM NKLG NOVM NRIL NRMD
                1  |  GFZ   | OHI2 PARC PBRI PERT PETS PIMO POHN POVE PTBB RABT
                1  |  GFZ   | REUN RIOP SANT SHAO STHL SUTH SUWN SYOG THU3 TOW2
                1  |  GFZ   | TRO1 TWTF USUD XMIS YAKT YAR2 YSSK ZAMB
                1  |  GRG   | ADIS GLSV ADIS GLSV
                1  |  JPL   | LAUT
                1  |  MIT   | ALBH BAKE CHUR DRAO FALK HARB HOB2 MAL2 PADO SCH2
                1  |  MIT   | STR1 SUTH TONG WAB2 ALBH BAKE CHUR DRAO HARB HOB2
                1  |  MIT   | MAL2 PADO SCH2 STR1 SUTH TONG
                2  |  COD   | GLSV KOUC NAUR PETS KRGG NAUR
                2  |  EMR   | CHUR FAIR BJNM CHUR FAIR GRAZ YELL
                2  |  ESA   | 22 GRAZ NICO WIND NICO WIND
                2  |  GFZ   | 18 18 BJNM GODE KOKV NICO POHN GODE NICO NRMD POHN
                2  |  GRG   | 13 13 GLSV KRGG QIKI DARW GLSV REUN
                2  |  JPL   | PETS QIKI
                2  |  MIT   | ALBH BAKE CHUR FALK FLIN HERS SCH2 SUTH TONG ALBH
                2  |  MIT   | BAKE CHUR FALK FLIN GLSV HERS SCH2 SUTH TONG
                3  |  COD   | MGUE NAUR TIXI ULAB MGUE NAUR TIXI ULAB
                3  |  EMR   | PRDS
                3  |  ESA   | 19 21 22 GLSV GRAZ KIT3 LAUT MAL2 REUN WIND MAL2
                3  |  ESA   | WIND
                3  |  GFZ   | 18 18 BJNM GODE MAL2 POHN REUN BJNM GODE MAL2 POHN
                3  |  GFZ   | REUN
                3  |  GRG   | 13 13 GLSV NRMD TRO1 DARW GLSV MAL2 NRMD TRO1
                3  |  JPL   | LAUT
                3  |  MIT   | ALBH BAKE CHUR FLIN HLFX IISC SUTH ALBH BAKE CHUR
                3  |  MIT   | FLIN HLFX IISC SUTH
                4  |  COD   | KOKV TIXI ULAB KOKV KRGG NAUR TIXI
                4  |  EMR   | TWTF
                4  |  ESA   | 22 BAKE KOUC MAL2 MGUE NYA1 WIND DGAR KOUC MAL2 MGUE
                4  |  ESA   | NYA1 WIND
                4  |  GFZ   | 18 18 BJNM BOGT DGAR HERS POHN BJNM BOGT DGAR HERS
                4  |  GFZ   | KOKB POHN
                4  |  GRG   | BOGT GLSV MAC1 TRO1 BOGT GLSV MAC1 TRO1
                4  |  JPL   | BOGT BOGT LAUT
                4  |  MIT   | AREG BAKE BOGT BRST CEDU CHPI CHUR DGAR DRAO FAA1
                4  |  MIT   | FLIN HARB HERS HLFX NRC1 STJO TWTF VILL WAB2 YELL
                4  |  MIT   | AREG BAKE BOGT BRST CEDU CHPI CHUR DGAR DRAO FAA1
                4  |  MIT   | FLIN HARB HERS HLFX NRC1 NYAL STJO TWTF VILL WAB2
                4  |  MIT   | YELL
                5  |  COD   | GLSV LAUT NAUR TUVA ULAB GLSV MGUE NAUR
                5  |  EMR   | YELL YELL
                5  |  ESA   | 20 21 22 28 3 20 21 22 28 ASPA BAKE CHUR DARW INEG
                5  |  ESA   | LHAZ RIO2 SCOR TWTF WIND BAKE CHUR INEG LHAZ WIND
                5  |  ESA   | WTZR
                5  |  GFZ   | 18 18 BJNM GODE LHAZ POHN BJNM GODE LHAZ POHN
                5  |  GRG   | 13 ADIS BOGT YELL ADIS BOGT GLSV
                5  |  JPL   | LAUT
                5  |  MIT   | BAKE CHPI CHUR FALK FLIN HARB TONG WHIT BAKE CHPI
                5  |  MIT   | CHUR FALK FLIN HARB TONG WHIT
                6  |  COD   | MAR6 MGUE TIXI MAG0 MAR6 MGUE TIXI
                6  |  EMR   | 25 25 YELL
                6  |  ESA   | 2 19 20 21 22 22 ALIC ANKR ASPA AUCK BRAZ BRST CHPI
                6  |  ESA   | CHUM CORD DARW DUBO FAA1 FLRS GLSV GRAS GRAZ GUAT
                6  |  ESA   | GUUG HARB HOFN HYDE IISC INEG INVK IRKJ KERG KOKV
                6  |  ESA   | KOUC KOUR LAUT LHAZ LPGS MAG0 MAR6 MATE MDVJ NICO
                6  |  ESA   | NIUM NOVM NYA1 OHI2 PBRI PIMO PTBB REUN RIO2 RIOP
                6  |  ESA   | SFER SOFI THTI THU2 TWTF WTZR YSSK ZAMB MAR6
                6  |  GFZ   | 18 18 BJNM GODE POHN BJNM GODE POHN ZAMB
                6  |  GRG   | GLSV GLSV
                6  |  JPL   | 25 25 LAUT
                6  |  MIT   | BAKE CHPI CHUR DUBO FAA1 HARB HLFX IISC KIRU NRC1
                6  |  MIT   | OHI2 TWTF BAKE CHPI CHUR DUBO FAA1 HARB HLFX IISC
                6  |  MIT   | KIRU NRC1 OHI2 TWTF

    
 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
               ----+--------+--------+-------------
                2  |  GFZ   | ~00:10 | ~ -0.10 ns
                3  |  EMR   | ~11:16 | ~ 0.69 ns
                5  |  ESA   | ~05:40 | ~ -0.04 ns
                5  |  GFZ   | ~02:30 | ~ -0.19 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. 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 G07 |    |    |  4 |  4 |  4 |  4 |  4 |
           PRN G09 |    |    |    |    |  4 |  4 |  4 |
           PRN G30 |    |    |    |  4 |  4 |  4 |  4 |

 8. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011 (GPS
    Week 1631, day 6, MJD 55667) all IGS products, including the IGS combined
    orbits, are based on the IGS realization of the ITRF2005 reference frame
    (IGS05). For more information see IGSMAIL #5447. The IGS05 frame is also the
    basis for the homogeneously reprocessed IGS products from GPS Weeks 730 to 1459
    (1994-2007); see IGSMAIL #6136.
    
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products, are
    based on the IGS realization of the ITRF2008 reference frame (IGS08). For more
    information see IGSMAIL #6354.
    
    Starting 07-Oct-2012 (GPS Week 1709, day 0, MJD 56207) all IGS products, are
    based on the updated IGS08 frame (IGb08). For more information see IGSMAIL
    #6663.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) all IGS products,
    are based on the IGS realization of the ITRF2014 reference frame (IGS14).
    For more information see IGSMAIL #7399.

 9. Small rotations were applied to all the AC orbit and ERP values in order to
    align them to the current IGS reference frame. These RX, RY and RZ rotations
    were estimated in the IGS SINEX combination process, performed by the IGS
    Reference Frame Coordinator at the Institut Geographique National (IGN).
    Starting on 19-Aug-2012 (GPS Week 1702; MJD=56158), ACs began contributing
    products based on 1d SINEX integrations. As a result, the SINEX combinations
    are now done daily instead of weekly, and the associated daily rotations are
    applied here to the orbits and ERPs. The estimated 7 transformations, from
    which only the 3 rotations are applied to the orbit and ERP values, are:
    
            |     |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre | Day |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+-----+---------------------------------------------------
       COD  |   0 |     .3    -.2    1.4       8     19     -1    -.62
       EMR  |   0 |   12.7   -2.9    9.5     -18     34     16    -.33
       ESA  |   0 |    -.5    -.4     .9       5    -17     20    -.52
       GFZ  |   0 |     .2     .4     .3      -2    -31      3    -.43
       GRG  |   0 |    9.2    4.4   29.0      43    -10     40    -.13
       JPL  |   0 |    6.8   -4.8    1.3       1      0      1    -.34
       MIT  |   0 |    2.6    1.8   10.1      -9     28     -9    -.13
       NGS  |   0 |    1.9   -2.6    5.3      13    -45    -38    -.35
       SIO  |   0 |    -.3    4.8    7.9      12    -23    -15    -.13

       COD  |   1 |     .5     .1    1.2      10      7    -14    -.54
       EMR  |   1 |    9.3     .3    8.3     -24     23     20    -.11
       ESA  |   1 |    -.1     .2     .4      14      7    -15    -.31
       GFZ  |   1 |     .6     .6     .5      -1    -21     -9    -.29
       GRG  |   1 |    9.8    6.5   29.4      54     -2     31    -.13
       JPL  |   1 |    4.4    2.6     .5      23    -12    -28    -.44
       MIT  |   1 |    1.8    4.7   11.3       7     19    -10    -.22
       NGS  |   1 |    2.5    1.2    6.4      35    -53    -12    -.26
       SIO  |   1 |    1.6    7.3    8.9      17    -11    -21    -.36

       COD  |   2 |     .5    -.1    1.1      17     27     -3    -.53
       EMR  |   2 |    7.4    -.4    4.6     -22     21     48    -.23
       ESA  |   2 |    -.5     .5    -.4      24      1    -16    -.42
       GFZ  |   2 |     .6     .6     .4       1    -29    -13    -.47
       GRG  |   2 |   12.0    3.2   25.6      67      2     31    -.16
       JPL  |   2 |    1.3     .0    2.5      15     -3     -7    -.21
       MIT  |   2 |    6.0     .9   11.2     -12     30    -11    -.30
       NGS  |   2 |    3.1   -7.6   14.5     -22    -74    -54    -.54
       SIO  |   2 |    3.3    5.3    7.6       7     -2    -12    -.28

       COD  |   3 |     .4    -.1    1.1      13     18     -2    -.53
       EMR  |   3 |    7.0   -1.1   12.7     -18     24     54    -.31
       ESA  |   3 |    -.1    -.1     .3      14    -15     15    -.58
       GFZ  |   3 |    1.0     .6     .1       5    -54      5    -.49
       GRG  |   3 |    7.5    1.3   29.7      56     23     18    -.16
       JPL  |   3 |    6.1    1.6    3.5       8     -3     -2    -.26
       MIT  |   3 |     .4    -.8   12.9     -39     22      8    -.29
       NGS  |   3 |   -1.4     .3   13.8     -27   -101    -28    -.55
       SIO  |   3 |     .8    2.6   10.3      12     -8     -4    -.30

       COD  |   4 |     .4     .1    1.4      16     22     -9    -.56
       EMR  |   4 |   -2.6     .9   11.4     -16     21     37    -.30
       ESA  |   4 |    -.5     .0     .9       3      7      4    -.57
       GFZ  |   4 |     .5     .4     .7      -3    -28     -7    -.59
       GRG  |   4 |    1.3     .8   25.1      51     -1     45    -.26
       JPL  |   4 |    2.6   -3.4    1.8       0      0      1    -.19
       MIT  |   4 |   -2.5   -3.4   12.8     -35     19      0    -.25
       NGS  |   4 |   -2.5    -.7    2.5       3     -4    -19    -.48
       SIO  |   4 |   -4.8    1.2    9.7      25     -5    -11    -.31

       COD  |   5 |     .5     .6    1.3      20     10    -12    -.62
       EMR  |   5 |     .2   -1.4   11.8      -6     37     33    -.24
       ESA  |   5 |    -.0     .3    1.0      -4     -6     18    -.54
       GFZ  |   5 |     .4     .4     .7       0    -29      2    -.49
       GRG  |   5 |    1.8    3.3   19.4      49     10     41    -.29
       JPL  |   5 |    1.8    2.1    2.7      11     13      1    -.67
       MIT  |   5 |    -.1    -.9   17.3     -18     15     25    -.22
       NGS  |   5 |    2.4     .4    8.0     -17    -54    -15    -.50
       SIO  |   5 |    -.5     .4    8.1      15     -3    -15    -.34

       COD  |   6 |     .3     .1    1.2      20     29    -12    -.37
       EMR  |   6 |    2.7    2.3    7.1     -12     40     44    -.17
       ESA  |   6 |    -.2     .1    1.4       7      0     16    -.23
       GFZ  |   6 |     .7     .4     .5      -5    -43     -8    -.39
       GRG  |   6 |    4.0    6.9   14.6      36      9     28    -.13
       JPL  |   6 |    6.7    1.9     .1       1      7      8    -.19
       MIT  |   6 |    -.7     .4   12.3     -20     24     21    -.10
       NGS  |   6 |   -2.3    2.0   14.4       2    -64      1    -.26
       SIO  |   6 |    -.4    6.3    4.2      24     -9      0    -.11


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.
    
    Starting 29-Jan-2017 (GPS Week 1934, day 0, MJD 57782) the absolute antenna
    model file has been updated to igs14.atx to be consistent with IGS14.
    See IGSMAIL #7399 for more information
        ftp://igs.org/pub/station/general/igs14.atx


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

Most combination statistics are with respect to the combined orbits and
consist of seven parts. The first, Table 1, summarizes all statistics for
the week. It contains means and standard deviations over the week of
satellite ephemeris and clock correction transformation parameters for
each centre (Table 1.2018.a). It also displays the computed satellite
position sigmas for the combined orbits (Table 1.2018.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 2.2018.[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 3.2018.[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 5.2018.0-6). 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 2018 summary.                       (Sep 09, 2018 - Sep 15, 2018)

Table 1.2018.a   GPS week: 2018   MJD: 58370.000-58376.000

         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  258|    0     0    -3     0     0    20  -.04   10   10 |    -598      -7      8     86
        |    1     0     1    10    17    11   .02           |      86     214
emr   80|    0     0     2     3    24    24   .16   13   13 |  141818    -303     16     88
        |    1     1     0     8    13    15   .02           |     831     821
esa  150|    0     0    -2     1     4   -10  -.06    8    9 |   -1526     335      9    203
        |    0     0     1     9     9    19   .02           |    1175    1827
gfz  177|   -2     0    -2   -17   -14    -9   .01   11   11 |    -504     475     15    106
        |    1     0     2    11    20     8   .03           |     464     737
grg  106|    2     1    10     0     0    -4  -.15   15   14 |     -13      81     13    148
        |    0     1     4    11    13    42   .03           |     147     297
igr  n/a|    0     0    -3   -12   -13     4  -.07    4    4 |    1992    -569     10     73
        |    0     0     1    10     6     7   .01           |    1249     788
jpl   80|    0     0     0    19     7    29   .20    8    8 |  214250    -208      8     98
        |    1     0     0     7     8    10   .02           |     672     794
mit  348|    0    -2     4   -31   -10    -9  -.08   12   12 |    -398      18     57    568
        |    0     0     0    22    27    10   .02           |     186     150
ngs  197|   -1     0     0     7   -17   -18  -.11   10    8 |    -593     -23   1041   2197
        |    0     0     2    16    15     8   .03           |      93     158
sio  338|    0     0    -1    -6     6   -30   .00   14   13 |     ---     ---    ---    ---
        |    0     0     1    28    25    23   .06           |     ---     ---


Table 1.2018.b   GPS week : 2018   MJD: 58370.000-58376.000   

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

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



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         result of the combination after the AC orbits were pre-aligned using
         the SINEX rotations from above. Prior to Wk 1702, AC ERP rotations
         used in the pre-alignment were also displayed.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.2018.0   GPS week: 2018   Day: 0   MJD: 58370.000                            

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  261|    0     1    -4     7   -21    10  -.02   10   10 |    -499    -327      6     90
emr   80|    2    -1     2    11    15     2   .16   14   13 |  142588    -252     15     97
esa  150|    0     0    -4     4    -9   -29  -.08    8    8 |   -1339     342      7    200
gfz  178|    0    -1    -1   -21   -21    -9   .00   11   10 |    -279      69     11     95
grg  109|    3     0    14    -1    -7    71  -.16   17   15 |     118    -122     11    138
igr  n/a|   -1     0    -2    -7   -21   -10  -.05    4    4 |    3189    -177      9     75
jpl   80|    0     1     0    16    -3    29   .19    9    9 |  214796    -137      8    104
mit  348|    0    -1     5   -43    28     3  -.05   12   11 |    -369      -4     78    486
ngs  211|   -2     0     0    22     3   -30  -.06    9    8 |    -565    -220   1089   1884
sio  345|    0     0     0   -22    43    -8  -.02   13   13 |     ---     ---    ---    ---

Table 2.2018.1   GPS week: 2018   Day: 1   MJD: 58371.000                            

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  263|    0     0    -1   -17     6    28  -.03    9    9 |    -590     119     20     98
emr   80|    0    -1     1   -11    23    37   .15   13   13 |  142614    -400     32     82
esa  150|    0     0    -2   -13    15   -29  -.07    8    8 |   -1314    1265     20    206
gfz  180|   -1     0    -3   -12    19   -17   .04   10   10 |       5    -187     39    124
grg  111|    1     0     9    12     6    36  -.15   14   13 |       9      20     30    171
igr  n/a|    0     0    -2   -21    -7     7  -.08    4    4 |    3249    -535     14     76
jpl   80|    1     1    -1    19     2    13   .19    8    8 |  214839    -431     18    105
mit  349|    0    -2     4     3   -48   -18  -.08   12   11 |     -65      -1     51    642
ngs  211|    0     0     0    22   -16   -29  -.11    9    8 |    -524      27   1029   2112
sio  351|    0     0    -2   -12   -31     4   .00   13   12 |     ---     ---    ---    ---

Table 2.2018.2   GPS week: 2018   Day: 2   MJD: 58372.000                            

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  258|    1     0    -4    -4    24    18  -.06   10   10 |    -619      57      6     78
emr   80|    0     0     0     8    13    36   .15   13   13 |  142264    -649     13     74
esa  150|    0     0    -2     8    14   -29  -.07    8    8 |   -1912   -1505      7    195
gfz  179|   -2     0    -5   -26   -28    -2   .02   11   10 |    -104     -20     12     94
grg  108|    2     0    12    11    11    -7  -.18   15   15 |      54     -83     11    149
igr  n/a|    0     0    -3   -25    -5    11  -.06    4    4 |    2873    -857     10     67
jpl   80|    0     1     0    35     5    48   .19    8    8 |  214531    -516      7    101
mit  349|    0    -1     5   -35     0   -26  -.08   12   12 |    -570      51     54    575
ngs  198|    0     0     4     2   -45   -16  -.11    9    7 |    -607      10    718   1907
sio  341|    0    -1    -1   -34     2   -28   .08   14   14 |     ---     ---    ---    ---

Table 2.2018.3   GPS week: 2018   Day: 3   MJD: 58373.000                            

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  260|    0     0    -4     1     3    25  -.01    9    9 |    -622     -40      6     83
emr   80|   -1     0     3     3    33    29   .17   12   12 |  141815   -1062     15    102
esa  150|    0     0    -3    -7    -6     1  -.07    8    9 |   -1117     237      8    216
gfz  178|   -2    -1    -5     0    11    -4  -.03   11   10 |    -413      55     12    116
grg  108|    2     1    14     0     6   -27  -.17   15   14 |       1    -149     12    163
igr  n/a|    0     0    -4   -11    -7     4  -.08    4    4 |    2041   -1069     11     75
jpl   80|    2     0     0    16    13    31   .18    8    8 |  214164    -865      6     95
mit  349|    0    -1     4    -4   -29   -13  -.10   12   12 |    -497    -203     79    991
ngs  191|   -1     0     1   -25   -27   -12  -.09   11    9 |    -623     -92    760   2090
sio  338|    0    -1    -1    22    -9   -51   .07   15   14 |     ---     ---    ---    ---

Table 2.2018.4   GPS week: 2018   Day: 4   MJD: 58374.000                            

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  259|    1     0    -2     5     1    36  -.06    9    9 |    -696      72      6     95
emr   80|   -1     0     2     3    12    36   .20   13   13 |  140611    1290     12     90
esa  150|    0    -1    -2    15     4   -13  -.06    9    9 |   -3447    2629      8    225
gfz  177|   -3    -1     1   -15   -29   -17  -.01   11   11 |    -526     486     13    106
grg  105|    2     2    10     0   -23   -37  -.14   15   15 |    -254     602     10    159
igr  n/a|    0     0    -3     8   -18     9  -.07    4    4 |     778     890     10     71
jpl   80|    1     0     0    24    13    24   .21    9    8 |  213127    1374      8    100
mit  349|    0    -2     4   -61    17    -7  -.11   13   13 |    -389      -5     50    345
ngs  193|   -1     0    -4    17   -12   -10  -.12   10    9 |    -709      90   1530   2281
sio  333|    1     0     0   -42    14   -35   .00   15   13 |     ---     ---    ---    ---

Table 2.2018.5   GPS week: 2018   Day: 5   MJD: 58375.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  256|    1     1    -2    -6   -22    19  -.06   10   10 |    -473    -232      6     70
emr   80|   -1    -1     1    11    50     5   .18   12   12 |  142107   -1120     13     80
esa  150|    1     0    -3     0     1    11  -.04    9    9 |     465   -2510     11    183
gfz  176|   -2     0     0   -12   -25   -19  -.01   11   11 |   -1317    1843     11     91
grg   96|    2     1     6   -12    15   -22  -.10   15   15 |     150    -102      8    124
igr  n/a|    0     0    -3   -11   -17    -1  -.05    5    5 |    1848   -1622     10     68
jpl   80|    1     0     0    12    20    30   .21    8    8 |  214739    -987      8     76
mit  349|    0    -3     4   -37   -20    -6  -.09   13   12 |    -289     -12     46    569
ngs  191|   -1     0     0     3    -6   -21  -.14   10    8 |    -440    -202   1033   2313
sio  329|    0     0     0    15    -5   -32  -.03   12   12 |     ---     ---    ---    ---

Table 2.2018.6   GPS week: 2018   Day: 6   MJD: 58376.000                            

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  255|    2     0    -3    13    14     2  -.01   10   10 |    -692     302      6     91
emr   80|    0    -2     1    -2    20    26   .15   13   13 |  140730      72     14     95
esa  150|    0     0     0     3     8    14  -.05    9    9 |   -2018    1890      7    200
gfz  174|   -2     0    -2   -35   -28     1   .03   12   12 |    -898    1084     13    117
grg  107|    2     2     3   -16    -3   -43  -.17   13   13 |    -169     402      9    137
igr  n/a|    0     0    -5   -16   -16     7  -.08    4    4 |     -28    -616     10     82
jpl   80|    0     0     0    12     3    31   .22    8    8 |  213555     100      7    107
mit  349|    0    -1     3   -41   -20     0  -.07   13   12 |    -611     306     47    374
ngs  189|    0    -1     3     9   -20    -9  -.13   10    8 |    -688     221   1134   2797
sio  335|    0     0    -2    26    32   -64  -.10   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 3.2018.0   GPS week: 2018   Day: 0   MJD: 58370.000                            

        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   11    8    6   13    2    6    9    9   13    3 |    24   30   27   26   27   25   29   24   25   34    26
   2  |   10   10    9   13   19    7    9   20   13   22    4 |    19   21   17   19   20   16   19   27   18   22    16
   3  |    9   11    7    6   24    2    8    8   10   11    3 |    24   24   21   23   39   22   25   23   22   28    23
  X4  |    3  ---  ---  ---  ---   27  ---  ---  ---  ---    0 |    34  ---  ---  ---  ---   24  ---  ---  ---  ---    35
   5  |   10   17    7   10   26    3   11   12    9   11    4 |    30   30   27   33   37   30   30   35   32   29    29
   6  |   10    8    8    8   15    4    8    7    7    8    3 |    23   28   24   19   25   20   26   22   20   25    22
   7  |    7   11    9   11   13    4    9   13   10   13    3 |    41   42   39   40   37   40   43   43   42   43    40
   8  |   10    9    7    9   16    3    9    7    5   11    3 |    23   24   23   20   26   20   22   21   21   28    21
   9  |   10    9    5    6   14    3    6    7    6   12    2 |    43   43   43   43   50   42   45   45   43   50    44
  10  |    7    8    6    6   20    3   10    9    5   10    3 |    24   24   22   23   34   23   28   25   26   27    24
  11  |   11   11   14    8   15    3    8    9    8   16    4 |    26   31   21   26   23   25   31   25   26   26    24
  12  |   12   21    7   11   14    4    7   14   10   12    4 |    28   32   28   27   30   26   29   28   26   25    27
  13  |   10   10   10   12   13    4   12   12    9   15    4 |    21   30   21   28   29   23   29   28   25   31    24
  14  |   11    5   11   13   16    4    8   12   10   13    4 |    22   23   20   26   26   21   22   26   25   25    21
  15  |   13   14    6   14   13    6   11   12   11   12    4 |    19   20   17   19   22   18   20   20   19   20    18
  16  |    9   30    6   15   21    7   10   20   11   19    5 |    23   30   22   22   26   20   22   24   23   23    20
  17  |   11   15    5   13   19    5    9   11   11   12    4 |    23   24   18   27   24   21   23   22   24   21    20
  18  |    6    9    9    8   14    2    5   10    9   11    3 |    20   20   23   19   18   19   20   19   20   18    19
  19  |   10   19    5   12   18    6   10   14   11   15    4 |    22   21   20   26   20   23   20   27   26   23    22
  20  |   12   11    6   12   19    5    6   12    7   19    4 |    27   24   22   23   33   21   24   22   22   21    22
  21  |   10    9    9   15   14    4    9   10   10   16    4 |    32   33   30   25   32   25   33   22   26   29    28
  22  |    9   14    7   14   29    3   10   13   13   13    4 |    31   32   29   33   44   31   32   33   34   33    31
  23  |   11   28    8   15   16    4    7   15   12   14    5 |    27   31   26   29   31   26   28   31   28   29    26
  24  |    9   10   12   10    9    4   10   10    6    9    3 |    20   26   24   18   18   19   26   19   20   23    20
  25  |    8   12    6    7   10    3   10    8    8   11    3 |    24   31   27   26   29   25   29   25   23   30    26
  26  |   12    8    5   10   14    3    7   12    6   10    3 |    27   31   26   29   35   27   29   30   29   29    28
  27  |   10    9    5    9   14    4    9    8    8    8    3 |    23   26   23   22   26   21   22   23   21   23    21
  28  |   10   13    6   11   13    3   10   12   10   16    4 |    29   30   27   28   26   26   28   26   27   27    26
  29  |   10   18    7   15   20    5   11   14   10   10    4 |    40   36   35   42   37   38   38   39   41   40    38
  30  |    9    8   11    9   12    3    9    9    7   11    3 |    21   28   23   22   21   22   30   23   23   30    23
  31  |    9    9    9   12   12    4    9   11    9   17    3 |    30   34   29   28   24   28   32   28   30   34    28
  32  |    7    8    4    6   12    3    8    8    6   10    2 |    39   40   38   40   41   39   41   39   42   46    40
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   14    8   11   17    4    9   12    9   13      |T   26   29   25   26   29   25   28   27   26   28    26
 WRMS |   10   13    8   10   15    4    9   11    8   13      |NE  26   29   25   26   29   25   28   27   26   28    26
 MEDI |   10   11    7   11   14    4    9   11    9   12      |MD  24   30   24   26   27   23   28   25   25   28    24

Table 3.2018.1   GPS week: 2018   Day: 1   MJD: 58371.000                            

        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    8    9    7   10    3    5    8    6   11    2 |    27   31   26   25   25   24   30   24   21   35    26
   2  |   11   10    8   14   18    7    9   21   12   21    4 |    19   22   21   24   20   21   23   32   22   25    20
   3  |    9   11    7    7   19    2    7    9    8    7    3 |    28   32   25   26   36   23   27   25   23   29    25
  X4  |    2  ---  ---  ---  ---   38  ---  ---  ---  ---    0 |    31  ---  ---  ---  ---   29  ---  ---  ---  ---    31
   5  |   10    9    7   11   18    4    8   11    9   11    3 |    40   40   37   39   47   38   40   41   38   38    39
   6  |    8    6    8    8   12    3    6    9    8    6    2 |    21   27   23   22   23   21   27   23   20   26    22
   7  |    7   12    9   11    9    4   10   12   11   13    3 |   118  118  115  116  118  117  118  120  117  121   117
   8  |    8    9    6    7   13    4    8    6    6    9    2 |    22   23   22   20   25   19   22   21   19   27    21
   9  |    5    9    6    8   14    2    7    7    6   10    2 |    71   70   70   71   71   70   71   70   66   75    70
  10  |    8   10    5    6   17    2   11   10    6   10    3 |    24   27   25   23   31   23   27   27   23   29    25
  11  |   10   10   14    9   14    4    8    8    7   14    3 |    31   36   25   28   28   28   35   29   27   31    28
  12  |   10   21    6   12   13    3    6   13   10   13    4 |    26   29   26   30   27   25   27   26   24   27    26
  13  |   14    9    9   13    9    4   10   13   12   15    4 |    23   34   23   30   25   25   32   27   25   27    25
  14  |   10    7   10   12   14    5    8   13   10   13    3 |    21   21   22   23   27   20   23   21   19   22    20
  15  |   11   10    8   13   11    4    9   11   10   12    3 |    19   19   16   22   21   19   20   20   20   18    19
  16  |    9   27    7   13   15    5   10   20   12   20    5 |    18   24   18   19   22   16   17   23   16   18    16
  17  |    8   14    6   11   17    5    9   10   10   12    3 |    25   28   22   28   26   23   27   27   24   25    24
  18  |    6    7    9    9   11    3    5    9    9    9    3 |    19   20   22   19   18   18   20   20   19   19    18
  19  |    9   21    7   12   17    6   10   13   13   13    4 |    19   21   19   22   18   18   20   22   19   18    18
  20  |   11    8    6   11   18    3    7   13    7   22    4 |    27   26   25   25   29   23   24   27   23   27    24
  21  |   11   10   10   12   14    6    8   12   10   18    4 |    39   37   37   31   38   34   38   31   31   34    34
  22  |    8   13    7   13   23    5    6   14   11   11    4 |    32   36   30   32   36   30   31   33   31   34    30
  23  |    9   27    7   13   15    5    9   15   13   14    4 |    30   30   27   26   30   25   28   26   25   25    25
  24  |    7    7   12    9    8    4    7   10    8    8    3 |    22   27   23   24   19   20   26   23   22   24    23
  25  |   11   11    5    6    8    5    7    8    7   12    3 |    26   33   29   29   29   26   30   27   25   35    28
  26  |   10   10    4    6   11    4    7   12    7   11    3 |    28   32   27   28   31   26   29   29   26   32    28
  27  |    9    9    7    6   12    3    8    7    6   10    3 |    23   25   23   23   27   21   24   24   20   28    22
  28  |   12   11    6   11   15    5    8   13   12   13    4 |    25   24   16   19   24   18   23   20   18   18    18
  29  |   11   17    8   12   16    7    9   14   11   13    4 |    39   40   39   41   39   39   39   41   38   42    39
  30  |    7    9   10    8    8    4    6   11    9    8    3 |    58   60   56   56   58   57   60   59   57   62    58
  31  |   10   10   10   10    9    3    8   12    9   16    3 |    23   31   24   26   24   23   28   23   23   29    24
  32  |    7    9    5    7   12    4    9    9    6   10    3 |    33   38   35   37   37   34   37   35   34   40    35
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13    8   10   14    4    8   12    9   13      |T   31   34   30   31   33   29   33   32   29   33    30
 WRMS |    9   13    8   10   13    4    8   11    8   12      |NE  31   34   30   31   33   29   33   32   29   33    30
 MEDI |    9   10    7   11   14    4    8   11    9   12      |MD  26   30   25   26   27   23   27   27   23   28    25

Table 3.2018.2   GPS week: 2018   Day: 2   MJD: 58372.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6    9    7   10   11    3    5    7    8   13    3 |    23   28   26   24   23   24   29   25   26   31    25
   2  |   13    9    9   14   18    7    9   21   13   22    5 |    19   21   20   24   16   22   20   32   24   25    20
   3  |    7    9    6    7   19    3    8    9    6   11    3 |    22   24   21   23   31   21   25   21   22   31    22
  X4  |    3  ---  ---  ---  ---   36  ---  ---  ---  ---    0 |    38  ---  ---  ---  ---   28  ---  ---  ---  ---    38
   5  |   11   11    5   13   22    4    9   11    9   15    4 |    27   29   26   29   31   26   28   30   26   27    26
   6  |    6    6    7    9   14    3    7    9    7    7    2 |    21   27   22   20   21   20   27   22   21   26    22
   7  |   10   12    9   11    8    5    9   15   11   14    4 |   276  275  278  277  278  277  277  279  281  279   278
   8  |   10   11    8    8   15    4    8    6    5   12    3 |    23   25   24   22   26   22   26   24   24   29    23
   9  |    8   10    6    6   14    2    8    7    5   12    3 |   123  121  122  124  125  123  124  125  125  127   123
  10  |    8   12    5    6   17    3    9    8    5    8    3 |    28   28   27   28   29   26   31   30   29   30    28
  11  |    9   13   13   12   15    3    8   10    7   19    4 |    25   33   26   29   21   27   31   30   27   21    26
  12  |   13   23    7   15   13    5    7   16   12   18    4 |    38   39   38   40   35   36   39   39   40   38    38
  13  |   13   15    8    9   11    6   10   14   10   17    4 |    20   27   21   25   23   21   28   25   24   23    22
  14  |   10    9   11   12   14    4    8   11    9   16    3 |    27   27   25   27   26   26   26   28   28   26    25
 X15  |    3  ---  ---  ---  ---   16  ---  ---  ---  ---    0 |    33  ---  ---  ---  ---   30  ---  ---  ---  ---    33
  16  |    9   27    7   13   15    5    9   17   13   18    5 |    21   23   20   22   25   21   23   23   21   20    20
  17  |    9   11    6   10   15    4    8   10    9   12    3 |    21   23   18   25   20   21   23   23   23   21    20
  18  |    6    7    8   11   14    3    4    8    8   11    3 |    17   17   19   13   18   14   17   18   15   21    16
  19  |   13   17    6   12   16    6    9   15   12   14    4 |    20   18   19   22   18   18   19   20   18   15    18
  20  |   11    9    9   11   17    4    7   12    8   15    3 |    27   25   26   25   27   23   25   26   25   22    24
  21  |   10    9   10   13   14    6    8   11   12   18    4 |    29   28   27   27   26   26   29   27   25   29    26
  22  |    9    9   10   15   23    4    9   13   13   13    4 |    24   27   27   29   29   26   28   29   29   25    25
  23  |    9   26    7   12   18    4    8   17   10   16    4 |    38   38   40   43   44   40   42   44   45   39    40
  24  |   11    9   11    8   11    4    7   12    8    8    3 |    31   34   35   28   27   31   34   33   34   37    32
  25  |   10   10    7    6   10    3   10    8    5   13    3 |    25   30   30   29   26   25   28   26   25   33    27
  26  |   11   10    5    7   12    3    7   12    7   11    3 |    24   26   24   25   27   23   28   25   22   27    24
  27  |   10   11    7    9   15    5    8    8    4   13    3 |    25   24   24   22   27   22   24   24   23   29    23
  28  |   10   12    6   10   15    4    8   14   11   15    4 |    31   29   27   29   27   26   29   26   27   25    26
  29  |   10   20   10   13   17    4    9   14   10   14    4 |    31   30   31   32   27   30   29   32   30   34    29
  30  |    9    8   11    8    8    4    6   11    7    8    3 |   130  131  132  130  133  131  134  132  131  135   132
  31  |   11    9   12   10    9    3    8   11    9   20    4 |    36   40   35   33   34   35   38   32   34   39    34
  32  |    7    8    6    8   13    4    7    6    6    7    2 |    27   27   27   26   26   25   28   23   28   29    26
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   13    8   11   15    4    8   12    9   14      |T   40   42   41   41   41   39   42   42   41   43    40
 WRMS |   10   13    8   10   15    4    8   12    7   14      |NE  40   42   41   41   41   39   42   42   41   43    40
 MEDI |   10   10    7   10   14    4    8   11    8   13      |MD  27   27   26   27   27   26   28   26   26   29    26

Table 3.2018.3   GPS week: 2018   Day: 3   MJD: 58373.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6    6    9    6   11    3    6    5   10   12    2 |    25   29   29   25   25   25   30   24   24   34    26
   2  |   11   10   11   15   18    7    8   22   14   20    5 |    27   30   27   33   28   29   29   35   33   31    28
   3  |   11    9    6    9   18    3   10    7    8   11    3 |    24   24   22   22   32   20   25   22   22   30    22
  X4  |    3  ---  ---  ---  ---   31  ---  ---  ---  ---    0 |    31  ---  ---  ---  ---   22  ---  ---  ---  ---    31
   5  |   10    9    6   13   21    4   10   11    9   14    4 |    27   31   29   30   34   28   29   28   31   27    28
   6  |    6    8    7   10   13    4    6    8   16    8    3 |    25   30   26   28   25   24   29   24   29   30    26
   7  |    9   10   10   10    9    4    8   15   12   13    3 |   371  372  375  368  373  372  374  369  373  370   372
   8  |    8   11    7    7   13    3    8    7    7    9    3 |    24   29   26   24   30   23   25   24   24   26    24
   9  |    9    9    6    7   16    2    5   10    8   12    3 |   149  151  151  150  152  151  149  149  151  152   150
  10  |    5    9    4    9   16    2    8    8    8    9    3 |    28   31   29   26   35   27   30   27   29   29    27
  11  |   10   12   14    9   12    3    8    7    9   17    4 |    29   38   30   30   30   31   36   31   30   32    30
  12  |   11   20    8   11   14    4    8   16   13   18    4 |    21   24   23   26   23   22   24   20   24   17    20
  13  |   11   10   12    7   11    4   10   13   11   18    4 |    16   27   16   21   22   17   27   22   21   25    19
  14  |   10    8    9   13   12    5   10   12   11   16    4 |    17   20   16   22   18   16   19   21   23   20    17
  15  |    9   12    7   11   13    4   11   13   11   20    4 |    18   18   16   21   21   17   20   22   23   16    18
  16  |    8   25    8   10   14    6    9   16   13   19    5 |    18   20   19   19   19   17   15   20   20   20    16
  17  |   11   11    7   13   14    5    8   10   12   11    3 |    27   26   20   32   24   26   26   28   27   27    25
  18  |    6    6    8   12   14    3    7    7   13   11    3 |    15   16   17   15   18   14   17   15   16   16    14
  19  |   13   16    6   14   16    6    9   15   14   14    4 |    21   20   19   26   18   20   19   21   20   21    20
  20  |    8    7    8   10   20    3    7   13    8   21    4 |    27   25   24   25   33   23   24   24   24   20    23
  21  |    8    9   10   13   16    5    8   12   11   17    4 |    32   37   30   33   32   32   35   32   31   36    31
  22  |    8    9    9   15   27    4   10   12   10   12    4 |    29   29   26   30   31   27   29   28   29   28    26
  23  |   11   25    7   14   17    6    8   16   12   13    5 |    26   30   26   27   22   24   24   26   28   26    24
  24  |    7    8   13    9   10    5    8   12    5   13    3 |    18   23   21   19   16   16   23   17   21   22    18
  25  |    8   12    6    9    9    4    9    8    8   15    3 |    18   23   20   23   20   18   22   18   19   29    19
  26  |   11    8    8    5   10    4    7    8    8   11    3 |    21   22   21   21   22   19   20   22   20   22    20
  27  |    7   12    6    6   16    5    9    8    8   12    3 |    25   27   26   28   30   25   28   27   26   34    26
  28  |   11   10    8   11   11    5    8   14   12   15    3 |    24   23   22   23   23   21   24   21   20   21    20
  29  |    8   19    6   15   17    7   11   14   13   17    4 |    39   38   35   40   40   37   39   39   36   45    37
  30  |    8    7   11    8    9    2    7   10    8    8    3 |   186  185  187  186  186  187  186  185  185  185   186
  31  |   10    9   11   11    9    3    9   12   11   18    4 |    25   30   25   27   21   25   28   25   28   28    25
  32  |    8    8    6    7   10    4    8    7   11   11    3 |    24   25   23   23   23   23   25   20   25   29    23
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   12    8   11   15    4    8   12   11   15      |T   43   46   44   45   46   43   46   44   45   46    43
 WRMS |    9   12    9   10   14    4    8   12    9   14      |NE  43   46   44   45   46   43   46   44   45   46    43
 MEDI |    8    9    8   10   14    4    8   12   11   13      |MD  25   27   25   26   25   23   26   24   25   28    24

Table 3.2018.4   GPS week: 2018   Day: 4   MJD: 58374.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    6    7   10   10    8    4    5    5    4   11    2 |    21   26   25   21   21   21   27   21   21   29    23
   2  |   11   11    8   18   18    6    9   23   13   20    5 |    21   25   25   34   21   25   26   32   30   29    24
   3  |    7    7    6    6   12    3    8    6   10   11    3 |    22   22   19   22   28   20   22   21   22   30    21
  X4  |    3  ---  ---  ---  ---   58  ---  ---  ---  ---    0 |    35  ---  ---  ---  ---   38  ---  ---  ---  ---    36
   5  |   10    8    6   16   25    5    8   13   12   16    4 |    53   56   51   52   58   52   55   53   55   53    53
   6  |    5    7    8    9   14    4    6   11    9   10    3 |    27   35   31   29   30   30   35   29   29   36    30
   7  |    8   14   10   11    9    5    9   16   11   16    4 |   443  452  450  440  445  444  449  440  441  445   445
   8  |   10   12    8   10   16    4   10    8    7   13    3 |    21   22   21   17   25   17   24   19   20   28    20
   9  |    6   12    9    6   15    5    8   12   12   13    3 |   205  206  205  203  205  205  204  203  205  204   204
  10  |    7   11    7    8   16    4    9    9    7    8    3 |    23   28   22   25   30   23   26   23   27   27    24
  11  |    8    9   15   10   10    5    8    7    6   17    3 |    20   27   23   19   20   20   27   19   20   15    20
  12  |   12   21    6   17   16    5   12   17   12   17    5 |    28   27   27   28   29   24   28   27   27   26    26
  13  |   11    9   11   10   12    5   10   13   10   13    4 |    15   24   16   24   20   17   24   21   19   21    18
  14  |   12    7   10   13   15    6   10   12   10   16    4 |    19   18   17   21   16   16   18   19   16   18    16
  15  |   10   13    7   11   14    4    8   15   12   19    4 |    17   20   15   19   21   16   20   22   21   18    18
  16  |    9   27    8   13   14    4   11   17   10   18    5 |    21   21   21   21   20   17   19   20   19   20    18
  17  |   10   11    8   12   14    4    9   12   11   14    3 |    20   23   18   23   21   20   24   22   23   19    20
  18  |    5    6   10   11   11    3    5    9   11    9    3 |    16   19   23   14   19   16   18   17   22   19    17
 X19  |   13   16    6   14  ---    6    9   14   13   15    4 |    20   17   19   25  ---   21   19   23   25   20    19
  20  |   10    9   10   10   20    4    8   16    9   18    4 |    26   25   21   25   31   23   26   25   25   26    23
  21  |    9    9   10   12   19    5    7   13   11   19    4 |    18   23   17   22   22   18   22   19   18   22    17
  22  |    8    7    9   13   17    3    8   13   12   11    3 |    24   26   21   27   28   23   24   26   27   25    23
  23  |   10   29    9   14   18    5    9   16   11   17    5 |    28   32   31   31   31   28   31   29   30   26    28
  24  |   10    7   11   12   11    4    8   14    7   10    3 |    20   24   22   15   19   18   25   22   21   24    20
  25  |   12   11    7    8   11    4   10   10    8   14    3 |    19   24   22   22   21   19   21   19   20   25    20
  26  |   12    9    6   11   13    4    7   10    7   11    3 |    23   25   23   25   24   20   23   22   21   25    22
  27  |   12   11    8    8   17    4    8    9    8   19    4 |    22   22   24   20   24   20   23   25   21   30    21
  28  |   10   12    7   10   19    5    8   15   11   16    4 |    23   22   19   19   25   18   22   20   22   20    19
  29  |    9   22    7   14   15    4   10   15   14   15    4 |    24   26   17   24   23   22   21   26   25   28    22
  30  |    9    8   12    8    8    4    6   11    7    7    3 |   234  238  238  236  234  236  235  235  231  237   235
  31  |    9   10   10   11   13    5    9   12   11   16    4 |    27   32   29   28   26   28   32   25   27   32    28
  32  |    8    7    6    6   12    3    9    6   10    9    3 |    28   31   28   27   29   26   31   27   31   31    28
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13    9   11   15    4    9   13   10   15      |T   48   52   49   50   52   48   51   50   50   51    48
 WRMS |    9   13    9   11   15    4    8   13    9   13      |NE  48   52   49   50   52   48   51   50   50   51    48
 MEDI |    9   10    8   11   14    4    8   12   10   15      |MD  22   25   22   24   24   21   24   23   23   26    22

Table 3.2018.5   GPS week: 2018   Day: 5   MJD: 58375.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    7    7   10    7   11    6    6    8    7    9    2 |    20   28   25   19   20   20   27   18   18   25    21
   2  |   12   11   10   15   17    6    8   22   13   17    4 |    21   20   22   28   18   24   21   33   25   26    21
   3  |    7    8    6    6   14    3    9    9    6    9    3 |    24   29   22   25   32   22   25   24   22   30    24
  X4  |    2  ---  ---  ---  ---   46  ---  ---  ---  ---    0 |    48  ---  ---  ---  ---   21  ---  ---  ---  ---    49
   5  |   10    8    9   14   21    4    8   13   11   12    4 |    64   65   64   63   68   62   65   63   62   62    63
   6  |    8    7    8    7   14    3    7   10    7   11    3 |    28   31   30   26   28   28   32   30   29   32    29
   7  |   10   12   12   12   11    6    9   16   11   14    4 |   563  569  569  556  565  560  568  556  562  564   564
   8  |    9    7    7    7   16    4    8    9    6    8    3 |    22   22   23   20   28   21   23   22   21   25    21
   9  |   10   12    8    7   18    5    8   14   11   10    3 |   261  265  263  261  262  261  265  259  264  263   263
  10  |    7    9    5    9   15    4    7   10    5    9    3 |    22   24   20   21   27   21   24   25   22   26    22
  11  |   10    9   14   10   12    5    9   11    8   14    4 |    20   29   23   19   21   20   28   18   19   14    20
  12  |    9   24    7   15   13    4    9   17   13   14    4 |    31   35   31   33   32   31   33   35   32   32    31
  13  |   11   10   12   12   11    5   11   11   10   13    4 |    23   28   22   27   27   25   30   26   25   23    24
  14  |   12    8   10   15   16    5   10   10   10   16    4 |    29   25   23   30   26   25   23   27   27   25    24
  15  |    9   19    7   13   16    5   11   14   13   14    4 |    19   24   16   21   22   19   21   23   20   16    18
  16  |   11   22    9   14   17    5    9   17   11   15    5 |    19   23   21   21   22   18   21   21   20   19    19
  17  |   13   14    6   12   15    4    8   13   12   13    4 |    18   20   15   22   22   18   21   21   24   17    17
  18  |    7    5   10    9   13    3    6    7    9   11    3 |    15   17   19   12   18   14   16   15   14   16    14
 X19  |    2  ---  ---  ---  ---   39  ---  ---  ---  ---    0 |    16  ---  ---  ---  ---   16  ---  ---  ---  ---    18
  20  |   11    8    8   11   18    6    7   14   10   16    4 |    26   24   21   20   28   20   23   27   21   22    21
  21  |   10    7    9   11   15    5    8   12   13   16    4 |    18   20   16   20   19   16   20   18   17   18    16
  22  |    9    8   11   13   20    3   10   15   11   12    4 |    27   33   28   32   34   30   30   33   33   29    29
  23  |   12   26    9   13   16    5    8   18   10   16    5 |    30   31   28   30   32   28   29   29   26   23    26
  24  |   10    8   11    8   11    4    7   13    7   10    3 |    25   31   29   24   22   25   31   28   24   30    27
  25  |    9    8    6    8   13    3    9   10    8   11    3 |    24   28   26   26   28   23   25   26   24   29    24
  26  |   10    9    8    7   14    5    6    9    8    9    3 |    24   29   24   25   29   24   27   24   26   26    25
  27  |    9    9    7    6   19    4    8    9    8    8    3 |    22   22   24   21   29   21   24   24   24   26    22
  28  |   12   13    8   13   21    6    8   18   12   15    4 |    28   29   27   28   32   26   28   27   24   25    25
  29  |   11   19    7   12   16    4   10   17   11   12    4 |    22   20   18   21   22   18   19   21   19   19    19
  30  |    9    8   14    8   11    5    6   11    9    8    3 |   269  270  271  269  271  268  270  271  271  274   270
  31  |    8   10   11   12   14    4    8   11   12   14    4 |    37   42   39   37   36   37   42   38   38   40    38
  32  |   10    7    5    6   13    3    8    6    7    6    2 |    34   35   33   32   38   32   34   32   32   36    33
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   12    9   11   15    5    8   13   10   12      |T   57   62   59   59   61   56   61   60   59   60    57
 WRMS |   10   12    9   11   15    5    8   12    8   12      |NE  57   62   59   59   61   56   61   60   59   60    57
 MEDI |   10    9    8   11   15    5    8   11   10   12      |MD  24   28   24   25   28   23   27   26   24   26    24

Table 3.2018.6   GPS week: 2018   Day: 6   MJD: 58376.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    5    8   11    9    8    2    5    6    7   10    3 |    21   25   24   17   23   18   26   19   18   24    21
   2  |   10   10    9   14   14    6    6   23   13   15    4 |    22   22   21   29   22   23   21   34   23   24    21
   3  |    8   10    5    8   12    3    7    9    7   11    3 |    26   29   25   24   31   23   27   25   24   32    25
  X4  |    2  ---  ---  ---  ---   38  ---  ---  ---  ---    0 |    39  ---  ---  ---  ---   24  ---  ---  ---  ---    39
   5  |   10    9    8   15   16    4    9   13   10   12    4 |    45   45   44   44   48   44   46   46   44   45    44
   6  |    7    8    9    8    9    4    7    7    7    9    2 |    28   33   31   27   30   27   34   28   27   31    29
   7  |   10   12   10   13   11    5    9   17   12   16    4 |   762  768  771  760  768  765  769  764  769  765   766
   8  |    9    9    7    8   15    3    7    6    7    8    3 |    22   25   22   22   26   20   23   22   21   24    21
   9  |   11   11    7    8   17    5    7   12    9    9    3 |   349  349  350  349  344  351  349  346  353  347   349
  10  |    9   12    5    8   14    3    9   10    7    8    3 |    25   24   22   22   29   21   26   24   22   26    23
  11  |    9   10   16   11   10    3    7    6    6   13    3 |    21   29   24   20   21   19   27   21   20   15    21
  12  |   11   24    7   17   14    5    7   18   12   14    4 |    34   37   33   36   34   33   36   37   35   33    33
  13  |   10   10   10   15   14    4    8   12    9   13    4 |    19   26   19   29   23   20   27   23   21   21    21
  14  |   10    8    8   11   15    4    8   11   10   16    3 |    32   30   29   32   29   27   31   31   26   29    28
  15  |    6   13    8   16   12    5    9   14   11   16    4 |    18   17   15   22   21   18   18   20   19   15    17
  16  |   13   23    8   13   13    5    9   20   10   20    5 |    25   25   23   22   21   19   19   21   21   21    19
  17  |   11   14    7   12   15    4    9   10   10   11    3 |    21   19   16   24   23   19   21   22   22   21    19
  18  |    6    7   11   10   12    3    5    8    8   14    3 |    18   18   22   17   18   16   18   17   16   17    16
 X19  |   12   17    7   13  ---    5    8   12   12   11    4 |    16   14   13   14  ---   15   15   13   13    9    15
  20  |   12   11    8   13   17    4    7   15    9   15    4 |    29   26   23   22   31   22   26   27   21   22    23
  21  |   10   11    9   15   14    5    8   12   12   17    4 |    19   20   16   22   19   17   20   18   15   19    16
  22  |   10    9   10   14   16    4    8   14   13   13    4 |    35   36   33   38   36   34   35   39   34   37    34
  23  |   13   27    7   14   16    4    8   17   12   15    5 |    30   32   27   27   26   25   27   27   28   21    25
  24  |    6   10   11   12    8    4    9   15    7    6    3 |    22   29   27   21   19   21   29   25   22   23    23
  25  |   10   10    6   11   10    5    8    9    9   12    3 |    28   30   28   27   29   25   29   28   27   34    27
  26  |   16   11    6    8   11    3    8   10    5    9    3 |    33   31   29   30   32   29   30   27   29   32    29
  27  |    8   12    8    9   15    3    9    9    7    7    3 |    21   23   21   21   26   20   22   23   23   21    21
  28  |   16   10    9   14   17    5    8   19   13   15    4 |    32   30   27   27   30   25   29   28   26   26    26
  29  |    7   20    9   12   13    5   10   16   12   11    4 |    21   20   19   26   22   19   19   23   21   21    19
  30  |    9    8   11   11   10    4    4   16    7    8    3 |   380  380  382  379  381  381  381  381  380  383   380
  31  |    9   11    9   11   11    4    9   10   11   14    3 |    31   33   31   30   29   30   34   27   26   31    29
  32  |    7    9    5    8   11    4    7    6    7    8    2 |    38   41   40   40   40   38   41   39   41   42    39
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   13    9   12   13    4    8   13   10   13      |T   70   73   71   71   74   68   72   71   70   71    69
 WRMS |   10   13    9   12   13    4    8   12    8   13      |NE  70   73   71   71   74   68   72   71   70   71    69
 MEDI |   10   10    8   12   13    4    8   12    9   12      |MD  26   29   25   27   29   23   27   27   23   24    23



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 4.2018   GPS week: 2018   MJD: 58370.0-58376.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3044 |U    8    12    20 |U    7    13    31 |U    9    11    18 |
emr | emr 2948 |U   12    16    33 |U   10    18    41 |    14    13    30 |
esa | esa 2948 |     8    13    22 |U    7    12    34 |    10    10    22 |
gfz | gfz 2948 |U    9    11    21 |U    7    12    35 |U    9    11    19 |
grg | grg 2920 |U   10    14    23 |U    8    15    41 |     9    14    20 |
igr | igr 2933 |     8    11    21 |     7    12    33 |     9    11    18 |
igs | igs 2947 |     8    13    22 |     7    13    33 |    10    12    20 |
jpl | jpl 2948 |U   10    15    28 |U    8    16    34 |U   13    12    29 |
mit | mit 2948 |    13    19    31 |U   12    20    49 |U   13    14    32 |



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 5.2018.0   GPS week: 2018   Day: 0   MJD: 58370.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9    13    23 |     8    21    41 |     7    11    16 |
emr | emr 2976 |    11    27    45 |     9    24    47 |    13    10    33 |
esa | esa 2976 |     8    13    24 |     8    15    45 |     8    11    19 |
gfz | gfz 2975 |     8    10    22 |     7    16    41 |     8    12    16 |
grg | grg 2976 |    10    12    24 |    10    16    56 |     8    16    22 |
igr | igr 2976 |     8    11    22 |     7    16    41 |     8    11    16 |
igs | igs 2976 |     8    13    24 |     7    18    42 |     8    12    19 |
jpl | jpl 2976 |     9    17    31 |     9    26    44 |    12    14    31 |
mit | mit 2976 |    25    44    52 |    20    34    75 |    12    26    38 |

Table 5.2018.1   GPS week: 2018   Day: 1   MJD: 58371.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3070 |     8    13    18 |     8    13    31 |    10    14    20 |
emr | emr 2976 |    10    20    28 |     9    17    45 |    14    14    34 |
esa | esa 2976 |     7    12    19 |     8    13    34 |    11    11    24 |
gfz | gfz 2976 |     8    12    19 |     8    11    33 |    11    13    23 |
grg | grg 2975 |     9    13    20 |     8    16    41 |    11    14    23 |
igr | igr 2965 |     7    12    19 |     7    12    32 |    11    14    22 |
igs | igs 2976 |     8    15    25 |     8    13    34 |    13    20    22 |
jpl | jpl 2976 |    10    16    23 |     8    15    36 |    14    13    32 |
mit | mit 2976 |     9    14    26 |    11    16    43 |    17    11    47 |

Table 5.2018.2   GPS week: 2018   Day: 2   MJD: 58372.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9    10    20 |     7    14    34 |     8    10    17 |
emr | emr 2880 |    12    12    21 |     9    19    38 |    17    11    33 |
esa | esa 2880 |     8    11    27 |     6    14    34 |    10    10    20 |
gfz | gfz 2880 |     9    10    24 |     7    14    37 |    10    12    20 |
grg | grg 2880 |    10    13    23 |     6    16    42 |     9    12    20 |
igr | igr 2880 |     8    10    23 |     6    14    33 |     9    10    16 |
igs | igs 2880 |     8    11    22 |     6    15    34 |    10    11    18 |
jpl | jpl 2880 |    10    15    33 |     8    18    34 |    14    11    26 |
mit | mit 2880 |    12    15    21 |    10    21    45 |    17    12    23 |

Table 5.2018.3   GPS week: 2018   Day: 3   MJD: 58373.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |    11    12    28 |     8    11    33 |    10    16    18 |
emr | emr 2976 |    14    14    45 |     7    15    34 |    16    22    29 |
esa | esa 2976 |    12    13    27 |     8    11    36 |    12    14    22 |
gfz | gfz 2976 |    12    12    28 |     8    10    37 |    12    16    20 |
grg | grg 2974 |    13    17    32 |     8    14    39 |    10    17    18 |
igr | igr 2976 |    11    12    27 |     7    10    34 |    11    16    18 |
igs | igs 2976 |    11    13    27 |     7    10    33 |    12    16    20 |
jpl | jpl 2976 |    12    14    33 |     7    13    31 |    16    15    28 |
mit | mit 2976 |    20    21    47 |    16    34    63 |    14    20    35 |

Table 5.2018.4   GPS week: 2018   Day: 4   MJD: 58374.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3072 |     9    12    18 |     5     9    26 |    10    11    18 |
emr | emr 2976 |    15    12    33 |    11    16    37 |    13    14    30 |
esa | esa 2976 |     9    12    23 |     7    10    31 |    10     9    24 |
gfz | gfz 2976 |     8    11    21 |     6     8    28 |    10    10    19 |
grg | grg 2880 |    10    14    23 |     7    13    36 |    11    12    20 |
igr | igr 2976 |     8    10    21 |     6     9    26 |     9    10    19 |
igs | igs 2976 |     9    12    22 |     6    10    28 |    10    10    22 |
jpl | jpl 2976 |    11    14    28 |    10    14    30 |    12    10    32 |
mit | mit 2976 |    10    12    26 |    10    16    63 |    12    11    35 |

Table 5.2018.5   GPS week: 2018   Day: 5   MJD: 58375.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2975 |     8    13    19 |     6    12    26 |     8     9    19 |
emr | emr 2880 |    14    13    31 |    11    17    44 |    12    12    28 |
esa | esa 2880 |     7    13    18 |     7    12    30 |     8     9    25 |
gfz | gfz 2880 |     8    12    18 |     6    12    31 |     8     9    20 |
grg | grg 2878 |     9    15    21 |     8    15    36 |     9    13    19 |
igr | igr 2880 |     7    11    17 |     6    12    30 |     8     9    20 |
igs | igs 2880 |     7    13    17 |     6    12    30 |     8    10    22 |
jpl | jpl 2880 |     8    15    21 |     8    14    35 |    11    13    29 |
mit | mit 2880 |     8    16    24 |     7    14    28 |    10    11    24 |

Table 5.2018.6   GPS week: 2018   Day: 6   MJD: 58376.0

CENT| CLK EPO  |        BRUX       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3071 |     6    12    16 |     6    10    29 |     8     7    16 |
emr | emr 2976 |    11    16    29 |    12    15    44 |    12     9    26 |
esa | esa 2976 |     6    13    20 |     8     9    31 |     9     6    20 |
gfz | gfz 2976 |     7    13    15 |     6    10    35 |     9     8    18 |
grg | grg 2880 |     7    15    18 |     7    13    37 |     7    11    18 |
igr | igr 2880 |     6    12    18 |     7     8    31 |     7     7    17 |
igs | igs 2967 |     6    13    18 |     7    10    30 |     9     8    19 |
jpl | jpl 2976 |     8    13    26 |    10    14    30 |    12     9    27 |
mit | mit 2976 |     7    14    17 |    10     9    30 |     9    10    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 6.2018   GPS week: 2018   MJD: 58370.500-58376.500

                                                         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 |     -16     -14      31     -49      0 |      23     27
            |      28      11      53      84      7 |       1
emr   uuuuu |     -25      31     -91      30      5 |      46     50
            |      15      28      93      98     13 |       3
esa   uuuuu |       4       6     -19      40      3 |      35     38
            |      12       6      30      44      4 |       2
gfz   uuuuu |       7      -5     114     -88      0 |      27     32
            |      22      19      87     159      6 |       2
grg   uuuuu |      15     -19       1      20      0 |      -2     13
            |      20      13      22      61      4 |       1
igr   xxxxx |       7      12      39      20      1 |       0     15
            |      10      11      54      51      5 |       2
irf   xxxxx |     -12     -17      12     -31    -11 |       1     18
            |      10       8      17      66      7 |       2
jpl   uuuuu |      -5     -20      17      84     -2 |      46     49
            |      18      11      56      80     14 |       3
mit   uuuuu |       7      16      -3    -114    -18 |      39     45
            |      17       9      42     147      8 |       3
ngs   uuuuu |      17      -6      46      27      1 |      15     21
            |      32      24     125     119      5 |       2
sio   uuuux |      -4      33    -180      -9      2 |      79     81
            |      19      16      30     109      8 |       2


Table 7.2018.0   GPS week: 2018   Day: 0   MJD: 58370.500

                                                         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 |      -7     -31      98     -94     -1 |      23     27
emr   uuuuu |     -14      56    -175     -45    -20 |      53     57
esa   uuuuu |       9       4     -57       3     -3 |      33     36
gfz   uuuuu |       3       6      20    -175     -4 |      26     32
grg   uuuuu |     -15      -5     -22     -19      5 |      -3     14
igr   xxxxx |      -4       1      72     -20     -7 |       3     17
irf   xxxxx |      -2     -20       4      25    -22 |       4     16
jpl   uuuuu |      -1     -24     102      70    -27 |      50     53
mit   uuuuu |      35      10     -27      10    -29 |      42     46
ngs   uuuuu |     -35     -19      85      69      5 |      14     20
sio   uuuux |      33      33    -145     180    -14 |      82     84

Table 7.2018.1   GPS week: 2018   Day: 1   MJD: 58371.500

                                                         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 |     -27      -5      37    -110      8 |      23     27
emr   uuuuu |     -10      74    -218      38      6 |      47     52
esa   uuuuu |     -10      12      25      28      4 |      33     37
gfz   uuuuu |     -35     -16      80    -286      6 |      25     31
grg   uuuuu |      26     -40     -10      57     -3 |      -2     14
igr   xxxxx |      12      18     102     106     -3 |       1     18
irf   xxxxx |      -7      -3       7      48    -17 |       3     18
jpl   uuuuu |      27     -35      43     190     -9 |      47     51
mit   uuuuu |      27      21     -20      48    -25 |      41     46
ngs   uuuuu |      10     -19      71     -14      4 |      14     20
sio   uuuux |      -3      45    -167      16      2 |      79     81

Table 7.2018.2   GPS week: 2018   Day: 2   MJD: 58372.500

                                                         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 |     -55     -16      99    -154      1 |      22     26
emr   uuuuu |     -17       9       0     124      8 |      44     47
esa   uuuuu |     -13      -1       9     -15      7 |      33     36
gfz   uuuuu |      -2       9     173    -298      8 |      24     30
grg   uuuuu |      41     -25      -3     136     -3 |      -4     13
igr   xxxxx |       4      30       0      13      4 |      -2     15
irf   xxxxx |     -13     -12     -17      26    -10 |       1     18
jpl   uuuuu |       2     -19     -22     199     -8 |      45     49
mit   uuuuu |       4       9     -74      17    -19 |      39     45
ngs   uuuuu |      59       2     -32      21      4 |      13     19
sio   uuuux |     -18      49    -234     -34      5 |      77     79

Table 7.2018.3   GPS week: 2018   Day: 3   MJD: 58373.500

                                                         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      -5      18     -82      3 |      24     28
emr   uuuuu |     -37       1     -13     144     14 |      45     49
esa   uuuuu |      12       7     -13      27      1 |      36     39
gfz   uuuuu |       8     -41     152      43     -3 |      27     33
grg   uuuuu |      25     -24     -11     -21     -1 |      -2     13
igr   xxxxx |      -6      11     -63     -32      7 |      -1     16
irf   xxxxx |     -26     -28       5     -45    -15 |       3     18
jpl   uuuuu |     -21     -26      74      62      1 |      45     49
mit   uuuuu |     -12      18      -3    -130    -23 |      41     47
ngs   uuuuu |      51      40    -133     -99      5 |      16     22
sio   uuuux |      -7      49    -165      78      5 |      79     81

Table 7.2018.4   GPS week: 2018   Day: 4   MJD: 58374.500

                                                         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     -11     -42      52      1 |      23     27
emr   uuuuu |     -19       9      -9     111     20 |      44     47
esa   uuuuu |      12       8     -20      44      6 |      34     38
gfz   uuuuu |      26      -5     262      37      4 |      26     32
grg   uuuuu |      30     -22      25      34     -4 |      -3     14
igr   xxxxx |      22      -2      53      42      7 |      -3     15
irf   xxxxx |     -25     -19      34     -45     -4 |      -1     18
jpl   uuuuu |     -26     -11     -46      51      6 |      43     46
mit   uuuuu |      -7      14      43    -141    -11 |      36     43
ngs   uuuuu |       8       1     -36    -127      4 |      15     21
sio   uuuux |     -29      23    -161    -107     12 |      77     79

Table 7.2018.5   GPS week: 2018   Day: 5   MJD: 58375.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      26      -1     -14      64    -15 |      25     28
emr   uuuuu |     -53      19     -50     -83      1 |      46     50
esa   uuuuu |      19      13     -30      90      2 |      36     40
gfz   uuuuu |      27      -2      88      39     -9 |      29     33
grg   uuuuu |       0     -14      -9     -24      7 |      -2     13
igr   xxxxx |      16      12      43     -26      1 |      -1     14
irf   xxxxx |     -12     -22      27    -120    -10 |      -1     18
jpl   uuuuu |     -20     -25      -5      -8     14 |      43     47
mit   uuuuu |       1       6      39    -291    -15 |      36     43
ngs   uuuuu |      -2      -9     123     179     -6 |      18     22
sio   uuuux |      -7      27    -186    -120     -2 |      80     82

Table 7.2018.6   GPS week: 2018   Day: 6   MJD: 58376.500

                                                         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 |     -43     -27      20     -16      5 |      25     28
emr   uuuuu |     -24      48    -169     -76      4 |      47     51
esa   uuuuu |       2      -3     -49     105      7 |      38     41
gfz   uuuuu |      24      16      26      24      1 |      29     34
grg   uuuuu |      -1      -4      37     -24      0 |       0     11
igr   xxxxx |       7      12      65      56      0 |       1     13
irf   xxxxx |      -2     -15      22    -102     -1 |      -2     18
jpl   uuuuu |       3      -1     -24      24      8 |      46     49
mit   uuuuu |       3      31      22    -310     -6 |      35     42
ngs   uuuuu |      27     -36     247     164     -6 |      19     22
sio   uuuux |       5       5    -199     -75      5 |      81     83


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