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[IGSREPORT-12278] Wk 1305 IGLOS Final Orbits
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IGS Electronic Report 23 Feb 12:46:59 PST 2005 Message Number 12278
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Author: AC Coordinator / GFZ Potsdam
IGLOS Orbit Combination - Week 1305 (Jan 09, 2005 - Jan 15, 2005)
Contact: Gerd Gendt (gendt @ gfz-potsdam.de)
Thomas Nischan ( nisn @ gfz-potsdam.de)
COMBINATION STRATEGY:
---------------------
Ephemeris are combined as weighted averages computed over all centres.
Each centre and satellite is given a position weight computed from the centers
absolute deviation to the unweighted average orbit after removing small
differences in the reference frames. These weights were applied in a
second iteration to estimate Helmert transformation parameters for each
center. Finally the transformation parameters with respect to the combined
solution and the RMS of the fit are reported in Tables 2.1305.
For long arc computations the Earth Orientation Parameters (EOPs) are fixed to
the values of the final IGS (GPS) combination.
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.
Weber R., 2000, IGS Technical Report 1999
PRODUCTS GENERATED:
-------------------
The combined IGL-ephemerides are written to daily files in the SP3-format.
The satellite accuracy codes in the header are based on the weighted rms.
for each satellite. Note, that the result files contain all satellites
that were analysed by at least one center. We refer to the 'REMARKS' section
below, in case a satellite or center was excluded from the combination.
The following naming convention is used for the result files:
igl1305[0-6].sp3 IGLOS-PP Glonass ephemerides files for days 0-6
of GPS Week 1305 in the SP3 format.
igl13057.sum Combination Report for GPS Week 1305.
REMARKS concerning the IGL Orbit Combination:
---------------------------------------------
1. Broadcast (brd) orbits and clocks are included in the combination for
statistics only.
2. Having only a few satellites the mcc orbits are included in the combination
for statistics only.
3. The satellite clock values in the combined orbit files are taken from the bkg
solution (broadcast).
The value of 999999.999999 microseconds, according to the sp3 format
convention, is used to indicate that no clock solution is available.
ORBIT COMBINATION AND EVALUATION STATISTICS:
--------------------------------------------
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 (Tables 1.1305, 1a.1305).
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 2.1305.0-6)
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 3.1305.0-6).
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.
Table 1: Week 1305 summary. (Jan 09, 2005 - Jan 15, 2005)
Table 1.1305.a GPS week : 1305 MJD: 53379.0-53385.0
Mean and standard deviations of transformation parameters to the
combined IGL orbit.
WRMS - orbit RMS weighted by the SP3 header accuracy codes.
STA - Mean number of stations in the daily solutions.
Units: mas, ppb, meters, nano-sec, nano-sec/day.
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 45|-.00 -.00 .01 -.08 -.00 -.07 -.0 .04 .04 | -.0 .0 .0
| .00 .00 .01 .06 .05 .29 .2 | .0 .0
cod 164| .00 -.00 .01 .10 .01 .00 .0 .04 .04 | --- --- ---
| .00 .00 .01 .04 .07 .24 .1 | --- ---
esx 54| .00 -.00 -.09 -.09 -.05 .12 .1 .16 .13 | 2800.1 51.1 18.96
| .01 .01 .01 .07 .11 .44 .3 | .0 .0
mcc n/a|-.03 -.00 -.02 -.70 .03 -.84 -.3 .36 .36 | --- --- ---
| .06 .02 .02 .31 .41 3.17 1.8 | --- ---
Table 1.1305.b GPS week : 1305 MJD: 53379.0-53385.0
Satellite position sigmas for the combined orbits
(coded in the IGS SP3 orbit files).
"E" flags eclipsing satellites.
Units: cm.
Day of GPS week
PRN | 0 1 2 3 4 5 6 | Remarks
------+-----------------------------+------------------------------------------
R02 | 4 3 3 4 3 4 4 |
R03 | 4 4 3 4 4 8 9 |
R04 | 4 4 4 3 4 3 4 |
R05 | 5 4 5 3 4 3 3 |
R06 | 5 5 6 6 4 5 4 |
R17 | 5 5 4 4 3 4 5 |
R18 | 6 4 3 4 4 9 5 |
R21 | 9 15 8 5 6 13 5 |
R22 | 4 3 4 3 4 3 5 |
R23 | 4 4 4 4 4 4 5 |
R24 | 6 6 5 4 4 5 6 |
Table 1.1305.c GPS week : 1305 MJD: 53379.0-53385.0
Daily transformation of broadcast orbits (brd) to the combined IGL orbit.
Mean and standard deviations of the transformation parameters for the
whole gpsweek. Units: mas, ppb, meters, nano-sec, nano-sec/day
CEN WEEK DAY | DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
-------------+-------------------------------------------------------------+---------------------
brd 1305 0 | -.08 .12 -1.24 11.58 -18.91 -372.30 86.0 4.13 4.13 | 30.9 -.2 4.39
brd 1305 1 | .17 -.03 -1.38 16.44 -17.03 -371.90 86.6 4.70 4.70 | 17.5 .3 4.08
brd 1305 2 | -.30 .06 -1.36 18.67 -21.79 -378.90 85.8 6.53 6.53 | 18.2 -1.6 5.99
brd 1305 3 | -.08 -.23 -.89 16.79 -16.21 -402.50 78.9 8.41 8.41 | -8.9 -1.5 5.94
brd 1305 4 | .39 -.01 -.89 20.57 -19.38 -401.10 86.8 7.62 7.62 | 31.9 -.8 4.61
brd 1305 5 | -.18 .48 -1.04 7.98 -25.93 -404.20 87.3 5.68 5.68 | 29.9 -.3 4.11
brd 1305 6 | .03 .43 -.81 15.33 -14.70 -402.50 85.4 5.05 5.05 | 48.1 -1.4 5.16
-------------+-------------------------------------------------------------+---------------------
brd 1305 mean| -.01 .12 -1.09 15.34 -19.14 -390.49 85.3 6.02 6.02 | 24.0 -.8 4.90
brd 1305 sdev| .23 .25 .24 4.28 3.79 15.27 2.9 1.57 1.57 | 17.7 .7 .81
Table 2: Daily transformation of each centre to the combined IGL orbit and
clocks for each day of the week. The transformation displayed is the
sum of a priori and estimated transformations.
WRMS - RMS weighted by the centres SP3 header accuracy codes.
STA - Number of stations in the daily solutions.
Units: mas, ppb, meters, nano-sec, nano-sec/day.
Table 2.1305.0 GPS week: 1305 Day: 0 MJD: 53379
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 45|-.00 -.00 .02 -.10 -.01 -.05 -.1 .04 .04 | .0 .0 .0
cod 164| .00 -.00 .01 .11 .03 .07 .1 .05 .05 | --- --- ---
esx 54| .00 .00 -.09 -.03 .09 .22 .5 .16 .14 | 1752.9 68.1 13.17
mcc n/a| .01 .00 -.04 -.80 -.04 1.30 1.9 .31 .31 | --- --- ---
Table 2.1305.1 GPS week: 1305 Day: 1 MJD: 53380
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 45|-.01 -.00 .01 -.10 -.07 -.27 -.4 .04 .04 | .0 .0 .0
cod 164| .01 -.00 .02 .11 .08 .07 .1 .04 .04 | --- --- ---
esx 54| .01 .01 -.11 -.16 -.09 .73 .0 .21 .14 | 2719.7 36.1 17.88
mcc n/a| .02 -.03 .02 -.77 -.22 2.55 -.8 .53 .53 | --- --- ---
Table 2.1305.2 GPS week: 1305 Day: 2 MJD: 53381
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 45| .00 -.01 .01 -.06 .04 -.06 .1 .04 .04 | .0 -.0 .0
cod 164|-.00 .00 .02 .15 -.05 -.01 -.2 .05 .05 | --- --- ---
esx 54| .00 -.02 -.09 -.16 .07 -.01 .4 .14 .11 | 2868.9 64.0 22.44
mcc n/a|-.06 .02 .01 -.17 -.23 -6.79 -4.0 .41 .41 | --- --- ---
Table 2.1305.3 GPS week: 1305 Day: 3 MJD: 53382
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 45|-.00 .00 .01 -.04 .07 .43 .3 .03 .03 | -.0 .0 .0
cod 164| .00 .00 .00 .07 -.10 -.47 -.2 .04 .04 | --- --- ---
esx 54| .01 -.01 -.08 -.03 -.02 -.37 .3 .12 .11 | 2207.1 46.0 17.49
mcc n/a|-.14 -.02 -.04 -.64 -.53 -3.10 -.1 .45 .45 | --- --- ---
Table 2.1305.4 GPS week: 1305 Day: 4 MJD: 53383
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 45|-.00 -.00 .03 -.01 -.00 .08 .2 .03 .03 | -.0 -.0 .0
cod 164| .00 .00 .01 .02 .03 -.08 -.1 .04 .03 | --- --- ---
esx 54| .01 -.00 -.11 -.01 -.22 .02 -.0 .13 .12 | 3866.3 18.9 20.04
mcc n/a| .00 .02 -.02 -.92 .11 -.87 .2 .31 .31 | --- --- ---
Table 2.1305.5 GPS week: 1305 Day: 5 MJD: 53384
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 45|-.01 .00 .01 -.21 -.02 -.49 .1 .06 .05 | -.0 .0 .0
cod 164| .00 -.00 .02 .12 -.01 .18 .1 .04 .03 | --- --- ---
esx 54|-.01 .01 -.09 -.06 -.06 .63 -.4 .22 .13 | 2320.1 53.2 16.33
mcc n/a|-.00 .01 -.02 -1.12 .59 .29 -.0 .20 .20 | --- --- ---
Table 2.1305.6 GPS week: 1305 Day: 6 MJD: 53385
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 45|-.01 .00 .02 -.05 -.02 -.15 -.1 .04 .04 | -.0 .1 .0
cod 164| .01 -.00 -.00 .10 .08 .27 .1 .05 .05 | --- --- ---
esx 54| .00 -.00 -.07 -.16 -.11 -.40 -.2 .17 .16 | 3865.4 71.1 25.37
mcc n/a|-.01 -.01 -.02 -.47 .54 .73 .6 .31 .31 | --- --- ---
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 IGL column gives resulting satellite accuracy measures found in
SP3 header. The last IGL column gives the RMS fit of the IGL 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 IGL 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: cm.
Table 3.1305.0 GPS week: 1305 Day: 0 MJD: 53379
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+---------------------------------------------------
R02 | 415 2 5 13 --- 4 | 6 9 9 --- 7
R03 | 124 3 5 12 15 4 | 10 10 12 20 10
R04 | 282 3 4 11 --- 4 | 7 8 9 --- 7
R05 | 320 5 5 14 --- 5 | 8 9 8 --- 8
R06 |1049 4 4 17 --- 5 | 15 15 15 --- 14
R17 | 410 2 6 14 --- 5 | 6 7 12 --- 6
R18 | 141 3 6 18 --- 6 | 20 21 27 --- 21
R21 | 187 7 8 30 --- 9 | 9 9 34 --- 10
R22 | 251 3 5 12 39 4 | 7 8 10 12 7
R23 | 210 3 4 11 --- 4 | 9 11 12 --- 9
R24 | 281 7 4 19 34 6 | 7 8 14 18 7
------+---------------------------------------------------
RMS | 413 4 5 16 31 |T 9 10 15 17 10
WRMS | 413 4 5 14 31 |NE 9 10 15 17 10
MEDI | 281 3 5 14 34 |MD 8 9 12 18 8
Table 3.1305.1 GPS week: 1305 Day: 1 MJD: 53380
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+---------------------------------------------------
R02 | 715 3 2 11 --- 3 | 5 7 13 --- 7
R03 | 123 3 2 12 33 4 | 14 12 16 36 13
R04 | 334 4 4 11 --- 4 | 8 9 7 --- 7
R05 | 264 3 3 13 --- 4 | 8 9 6 --- 8
R06 |1132 4 5 15 --- 5 | 9 8 17 --- 8
R17 | 348 5 4 15 --- 5 | 5 5 9 --- 4
R18 | 175 2 4 12 --- 4 | 19 17 18 --- 18
R21 | 278 8 9 55 --- 15 | 6 4 56 --- 9
R22 | 138 3 3 11 37 3 | 5 6 8 24 6
R23 | 356 3 2 13 --- 4 | 5 5 9 --- 4
R24 | 258 6 5 17 78 6 | 5 7 9 27 5
------+---------------------------------------------------
RMS | 470 4 4 21 53 |T 8 8 15 29 8
WRMS | 470 4 4 14 53 |NE 8 8 15 29 8
MEDI | 278 3 4 13 37 |MD 6 7 9 27 7
Table 3.1305.2 GPS week: 1305 Day: 2 MJD: 53381
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+---------------------------------------------------
R02 |1179 3 3 10 --- 3 | 6 6 8 --- 5
R03 | 267 2 3 10 41 3 | 7 8 11 45 7
R04 | 507 4 6 11 --- 4 | 7 9 8 --- 6
R05 | 193 3 7 12 --- 5 | 9 13 6 --- 9
R06 |1500 6 4 16 --- 6 | 10 9 17 --- 10
R17 | 318 4 4 13 --- 4 | 6 6 7 --- 5
R18 | 520 2 3 10 --- 3 | 15 16 15 --- 15
R21 | 319 7 6 25 --- 8 | 7 10 25 --- 9
R22 | 141 4 5 9 --- 4 | 9 7 9 --- 7
R23 | 333 3 6 12 --- 4 | 7 7 12 --- 6
R24 | 269 4 4 16 --- 5 | 6 6 9 --- 5
------+---------------------------------------------------
RMS | 652 4 5 14 41 |T 8 9 12 45 8
WRMS | 652 4 5 11 41 |NE 8 9 12 45 8
MEDI | 319 4 4 12 41 |MD 7 8 9 45 7
Table 3.1305.3 GPS week: 1305 Day: 3 MJD: 53382
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+---------------------------------------------------
R02 |1106 2 4 11 --- 4 | 6 8 13 --- 7
R03 | 570 3 3 11 32 4 | 16 13 18 20 14
R04 | 606 2 3 10 --- 3 | 7 4 7 --- 5
R05 | 262 3 3 10 --- 3 | 8 7 8 --- 7
R06 |2152 7 5 17 --- 6 | 11 14 18 --- 12
R17 | 322 3 3 13 --- 4 | 6 5 7 --- 4
R18 | 665 2 6 11 --- 4 | 16 17 18 --- 17
R21 | 198 3 4 17 --- 5 | 8 9 32 --- 9
R22 | 149 3 3 10 56 3 | 9 8 8 35 7
R23 | 666 3 5 11 --- 4 | 11 10 8 --- 9
R24 | 335 3 5 9 --- 4 | 10 6 8 --- 7
------+---------------------------------------------------
RMS | 841 3 4 12 45 |T 10 9 13 28 9
WRMS | 841 3 4 11 45 |NE 10 9 13 28 9
MEDI | 570 3 4 11 32 |MD 9 8 8 20 7
Table 3.1305.4 GPS week: 1305 Day: 4 MJD: 53383
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+---------------------------------------------------
R02 | 637 3 2 10 --- 3 | 6 4 5 --- 4
R03 | 659 4 2 14 18 4 | 9 11 18 11 10
R04 | 896 3 3 12 --- 4 | 4 5 8 --- 5
R05 | 562 4 3 11 --- 4 | 8 8 8 --- 7
R06 |1708 5 5 10 --- 4 | 12 16 19 --- 15
R17 | 341 3 3 11 --- 3 | 5 4 8 --- 4
R18 | 364 2 4 11 --- 4 | 16 17 18 --- 17
R21 | 142 3 5 21 --- 6 | 6 6 21 --- 8
R22 | 324 3 3 13 30 4 | 6 7 10 12 6
R23 | 968 3 4 13 --- 4 | 10 9 9 --- 8
R24 | 438 4 5 11 39 4 | 7 7 8 36 6
------+---------------------------------------------------
RMS | 762 3 4 13 31 |T 8 9 12 20 8
WRMS | 762 3 3 12 31 |NE 8 9 12 20 8
MEDI | 562 3 3 11 30 |MD 7 7 9 12 7
Table 3.1305.5 GPS week: 1305 Day: 5 MJD: 53384
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+---------------------------------------------------
R02 | 298 6 3 11 --- 4 | 5 10 11 --- 7
R03 | 283 7 4 29 18 8 | 15 14 28 11 15
R04 | 568 2 2 11 --- 3 | 6 4 7 --- 5
R05 | 430 3 2 10 --- 3 | 7 7 6 --- 6
R06 |1331 8 5 12 --- 5 | 13 18 19 --- 15
R17 | 465 6 4 11 --- 4 | 8 5 5 --- 4
R18 | 233 7 5 31 --- 9 | 16 16 33 --- 17
R21 | 203 9 8 48 --- 13 | 5 6 43 --- 6
R22 | 259 4 3 10 20 3 | 6 5 7 26 5
R23 | 598 3 4 14 --- 4 | 7 5 13 --- 6
R24 | 600 5 3 15 23 5 | 5 4 9 38 3
------+---------------------------------------------------
RMS | 568 6 4 22 20 |T 8 9 16 25 8
WRMS | 568 5 3 13 20 |NE 8 9 16 25 8
MEDI | 430 6 4 12 20 |MD 7 6 11 26 6
Table 3.1305.6 GPS week: 1305 Day: 6 MJD: 53385
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+---------------------------------------------------
R02 | 212 4 4 12 --- 4 | 8 7 10 --- 7
R03 | 218 7 5 33 18 9 | 15 13 27 19 14
R04 | 390 2 3 12 --- 4 | 6 5 7 --- 5
R05 | 666 2 3 11 --- 3 | 7 8 7 --- 7
R06 | 902 5 3 11 --- 4 | 18 18 18 --- 18
R17 | 521 5 4 15 --- 5 | 7 6 10 --- 6
R18 | 328 2 6 17 --- 5 | 18 19 29 --- 19
R21 | 268 4 6 16 --- 5 | 9 11 18 --- 10
R22 | 277 3 6 16 19 5 | 8 11 13 18 9
R23 | 310 4 7 13 --- 5 | 11 11 14 --- 11
R24 | 821 6 5 17 47 6 | 8 7 12 28 7
------+---------------------------------------------------
RMS | 505 4 5 17 31 |T 10 11 15 22 10
WRMS | 505 4 5 16 31 |NE 10 11 15 22 10
MEDI | 328 4 5 15 19 |MD 8 11 13 19 9