[IGSREPORT-12858] Wk 1334 IGLOS Final Orbits
Gerd Gendt3
igsacc at gfz-potsdam.de
Tue Aug 16 08:18:24 PDT 2005
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IGS Electronic Report 16 Aug 08:18:33 PDT 2005 Message Number 12858
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Author: AC Coordinator / GFZ Potsdam
IGLOS Orbit Combination - Week 1334 (Jul 31, 2005 - Aug 06, 2005)
Contact: Gerd Gendt (gendt at gfz-potsdam.de)
Thomas Nischan ( nisn at 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 2.1334.
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:
igl1334[0-6].sp3 IGLOS-PP Glonass ephemerides files for days 0-6
of GPS Week 1334 in the SP3 format.
igl13347.sum Combination Report for GPS Week 1334.
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. Starting on 01-May-2005 (GPS Week 1321; MJD 53491)[IGSMAIL-5151]
BKG, ESA, and CODE will start to refer their GLONASS orbit products
to the following satellite antenna offset (SAO) values:
X/Y/Z = 0.000/0.000/0.000 meter for GLONASS and
X/Y/Z = -0.545/0.000/0.000 meter for GLONASS-M SVs.
4. The satellite clock values in the combined orbit files are taken from the
broadcast files. The following gps/glonass time offsets derived from the
bkg summary files were added to the broadcast clocks.
Day | applied clock offset
----+---------------------
0 | 244.2 ns
1 | 261.7 ns
2 | 238.8 ns
3 | 239.0 ns
4 | 240.4 ns
5 | 242.2 ns
6 | 235.3 ns
5. The following orbit solutions were excluded from the combination
because they were biasing the weighted average (generally indicated
by long arc RMS).
Day | Centre | PRN list
----+--------+---------------
0 | BKG | R06
1 | BKG | R06
2 | BKG | R06
3 | BKG | R06
3 | ESX | R06 R17
4 | ALL | R06
4 | ESX | R17
5 | ALL | R06
5 | ESX | R02 R17
6 | ALL | R06
6 | ESX | R02 R17
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 1.1334, 1a.1334).
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 2.1334.0-6)
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 3.1334.0-6).
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 1334 summary. (Jul 31, 2005 - Aug 06, 2005)
Table 1.1334.a GPS week : 1334 MJD: 53582.0-53588.0
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 43|-.00 -.00 -.01 -.04 .01 .04 .2 .09 .05 | .0 .1 4.73
| .00 .00 .01 .03 .06 .14 .2 | .0 .2
cod 171|-.00 -.00 .01 .03 .01 -.04 -.2 .04 .04 | --- --- ---
| .00 .00 .00 .06 .05 .11 .1 | --- ---
esx 50| .00 .00 .00 -.03 .01 -.00 .1 .34 .05 |-1298.5 -27.6 471.94
| .00 .00 .00 .09 .13 .18 .2 | 4109.0 87.2
mcc n/a|-.01 .01 -.00 -.65 -.06 .49 -.1 .25 .25 | --- --- ---
| .02 .02 .03 .29 .27 1.14 1.0 | --- ---
Table 1.1334.b GPS week : 1334 MJD: 53582.0-53588.0
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
------+-----------------------------+------------------------------------------
R01E | 2 2 3 2 3 3 4 |
R02E | 3 2 2 3 8 --- --- |
R03E | 3 2 3 3 2 3 4 |
R04E | 2 3 2 2 2 2 2 |
R06E | 5 6 5 0 --- --- --- |
R07E | 3 3 4 6 5 3 4 |
R08E | 3 2 3 3 3 3 3 |
R17 | 5 6 6 4 5 9 7 |
R18 | 3 3 3 2 3 3 3 |
R21 | 3 4 3 3 2 3 2 |
R22 | 4 3 4 4 5 3 3 |
R23 | 3 2 2 3 3 3 2 |
R24 | 3 5 3 2 3 3 2 |
Table 1.1334.c GPS week : 1334 MJD: 53582.0-53588.0
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 1334 0 | .27 -.32 -.39 37.98 -14.58 -378.60 76.0 7.19 7.19 | 244.2 .0 .0
brd 1334 1 | .01 .39 -.27 33.55 -21.43 -381.50 87.4 7.66 7.66 | 261.7 .0 .0
brd 1334 2 | .19 -.13 -.56 37.00 -10.37 -368.40 80.9 8.15 8.15 | 238.8 .0 .0
brd 1334 3 | .42 -.13 -.64 36.12 -10.17 -353.40 87.2 8.99 8.99 | 239.0 .0 .0
brd 1334 4 | -.59 .24 -.22 38.54 -23.09 -353.60 80.5 6.56 6.56 | 240.4 .0 .0
brd 1334 5 | -.41 .26 -.75 37.88 -17.94 -352.80 77.3 4.74 4.74 | 242.2 .0 .0
brd 1334 6 | .55 .18 -.44 36.38 -10.84 -365.50 83.2 5.99 5.99 | 235.3 .0 .0
-------------+-------------------------------------------------------------+---------------------
brd 1334 mean| .06 .07 -.47 36.78 -15.49 -364.83 81.8 7.04 7.04 | 243.1 .0 .0
brd 1334 sdev| .43 .26 .19 1.67 5.42 12.13 4.4 1.42 1.42 | 8.7 .0 .0
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 2.1334.0 GPS week: 1334 Day: 0 MJD: 53582
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 43|-.00 .00 -.02 -.05 .01 .13 .3 .10 .07 | .0 .1 4.40
cod 171| .00 -.00 .00 .05 -.02 -.11 -.1 .03 .04 | --- --- ---
esx 50|-.00 .00 .01 -.05 .09 -.08 .1 .06 .05 |-9999.9 -39.0 43.60
mcc n/a| .00 -.02 -.02 -.77 .37 .60 1.4 .16 .16 | --- --- ---
Table 2.1334.1 GPS week: 1334 Day: 1 MJD: 53583
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 43|-.00 .00 -.01 .00 .06 -.04 .1 .12 .07 | .0 .4 6.84
cod 171| .00 -.00 .00 .06 .01 -.11 -.3 .03 .03 | --- --- ---
esx 50| .00 .00 .01 -.17 -.07 .23 .1 .07 .05 | 785.0 19.5 27.82
mcc n/a| .01 .03 -.02 -.63 -.32 1.43 -.1 .28 .28 | --- --- ---
Table 2.1334.2 GPS week: 1334 Day: 2 MJD: 53584
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 43|-.00 -.00 -.01 -.05 .08 -.19 .0 .11 .05 | .0 -.1 5.34
cod 171|-.00 .00 .01 .05 -.07 .06 -.2 .04 .04 | --- --- ---
esx 50| .01 -.00 .00 -.02 -.02 .23 .3 .06 .05 | 859.5 13.8 29.91
mcc n/a|-.00 .01 .01 -.41 .08 2.11 -1.4 .30 .30 | --- --- ---
Table 2.1334.3 GPS week: 1334 Day: 3 MJD: 53585
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 43|-.01 .00 .00 -.01 .04 .18 -.1 .15 .05 | .0 .1 4.85
cod 171|-.01 -.00 .00 -.06 .08 -.10 -.0 .04 .04 | --- --- ---
esx 50| .01 .01 -.01 .10 -.17 -.08 .1 .75 .04 |-3134.9 -219.53162.31
mcc n/a|-.05 .02 .02 -1.09 -.17 .16 -.8 .32 .32 | --- --- ---
Table 2.1334.4 GPS week: 1334 Day: 4 MJD: 53586
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 43|-.00 -.01 -.01 -.04 -.04 .19 .3 .06 .06 | -.0 -.1 4.43
cod 171|-.00 -.00 .01 .06 .00 -.18 -.1 .05 .04 | --- --- ---
esx 50| .00 .00 .00 -.08 .05 -.01 -.1 .47 .06 | 740.8 -1.2 13.70
mcc n/a|-.01 .03 -.03 -.75 -.29 -1.14 -1.0 .17 .17 | --- --- ---
Table 2.1334.5 GPS week: 1334 Day: 5 MJD: 53587
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 43| .00 -.00 -.00 -.02 -.08 .08 .3 .04 .04 | .0 .0 3.99
cod 171| .00 .00 .01 .11 .04 .12 -.3 .05 .05 | --- --- ---
esx 50| .00 .01 .00 -.07 .24 -.28 -.2 .46 .05 | 816.2 24.3 15.21
mcc n/a|-.02 .01 -.04 -.74 -.28 -.68 .8 .19 .19 | --- --- ---
Table 2.1334.6 GPS week: 1334 Day: 6 MJD: 53588
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS
--------+------------------------------------------------+---------------------
bkg 43|-.01 -.00 -.01 -.08 -.00 -.04 .3 .04 .04 | .0 -.0 3.29
cod 171| .00 -.00 .01 -.02 .03 .03 -.3 .04 .03 | --- --- ---
esx 50| .00 .01 -.00 .06 -.07 -.05 .1 .50 .05 | 843.6 9.1 11.03
mcc n/a|-.03 .02 .04 -.16 .17 .94 .5 .33 .33 | --- --- ---
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 3.1334.0 GPS week: 1334 Day: 0 MJD: 53582
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+--------------------------+----------------------
R01E |1041 2 3 4 --- 2 | 4 4 4 --- 4
R02E | 891 5 2 5 --- 3 | 4 5 99 --- 5
R03E | 292 4 4 5 9 3 | 5 7 6 5 5
R04E | 172 2 3 3 --- 2 | 5 6 5 --- 5
R06E |1378 32 4 6 --- 5 | 8 5 32 --- 5
XR07E |1439 --- 3 4 --- 3 | --- 13 17 --- 14
R08E |1276 5 3 5 --- 3 | 8 6 7 --- 6
R17 | 168 5 4 12 --- 5 | 5 5 43 --- 3
R18 | 401 5 3 6 --- 3 | 24 24 23 --- 23
R21 | 309 5 2 7 --- 3 | 4 6 7 --- 5
R22 | 484 5 4 6 21 4 | 8 7 8 18 7
R23 | 276 5 4 3 --- 3 | 9 7 7 --- 7
R24 | 303 4 5 4 --- 3 | 6 7 6 --- 5
------+--------------------------+----------------------
RMS | 719 10 3 6 16 |T 8 8 20 12 7
WRMS | 719 7 4 5 16 |NE 9 9 16 18 8
MEDI | 401 5 3 5 9 |MD 5 6 7 5 5
Table 3.1334.1 GPS week: 1334 Day: 1 MJD: 53583
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+--------------------------+----------------------
R01E |1192 3 2 5 --- 2 | 3 3 3 --- 3
R02E |1081 3 3 3 --- 2 | 4 4 99 --- 3
R03E | 354 3 2 5 20 2 | 4 6 6 4 5
R04E | 264 4 4 3 --- 3 | 5 8 5 --- 6
R06E |1539 38 4 8 --- 6 | 8 6 24 --- 5
XR07E |1111 --- 2 4 --- 3 | --- 12 11 --- 12
R08E |1066 2 2 3 --- 2 | 7 8 8 --- 7
R17 | 138 6 4 14 --- 6 | 4 5 37 --- 5
R18 | 445 4 3 6 --- 3 | 19 19 18 --- 18
R21 | 187 7 4 5 --- 4 | 3 6 8 --- 5
R22 | 522 4 4 7 17 3 | 3 4 5 15 3
R23 | 396 4 3 3 --- 2 | 6 6 7 --- 6
R24 | 279 7 4 13 41 5 | 7 5 15 8 6
------+--------------------------+----------------------
RMS | 766 12 3 7 28 |T 6 7 19 9 6
WRMS | 766 7 3 5 28 |NE 7 8 15 12 7
MEDI | 445 4 3 5 20 |MD 4 6 8 8 5
Table 3.1334.2 GPS week: 1334 Day: 2 MJD: 53584
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+--------------------------+----------------------
R01E |1117 3 3 5 --- 3 | 7 10 7 --- 8
R02E |1135 2 3 4 --- 2 | 4 5 99 --- 4
R03E | 350 3 5 5 22 3 | 8 6 8 8 7
R04E | 486 4 3 4 --- 2 | 6 4 5 --- 5
R06E |1973 36 3 6 --- 5 | 9 6 27 --- 6
XR07E |1328 --- 3 5 --- 4 | --- 11 10 --- 11
R08E | 773 5 5 4 --- 3 | 8 4 9 --- 6
R17 | 241 9 4 13 --- 6 | 10 10 43 --- 8
R18 | 286 3 2 5 --- 3 | 19 19 22 --- 20
R21 | 193 4 4 2 --- 3 | 5 8 5 --- 6
R22 | 483 3 6 7 41 4 | 6 12 9 39 8
R23 | 395 3 4 3 --- 2 | 6 5 7 --- 5
R24 | 167 4 4 7 24 3 | 8 7 7 9 7
------+--------------------------+----------------------
RMS | 815 11 4 6 30 |T 8 8 20 19 8
WRMS | 815 5 4 5 30 |NE 9 10 16 24 9
MEDI | 483 3 4 5 24 |MD 7 7 9 9 7
Table 3.1334.3 GPS week: 1334 Day: 3 MJD: 53585
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+--------------------------+----------------------
R01E | 701 3 4 3 --- 2 | 6 5 7 --- 6
R02E | 979 4 4 3 --- 3 | 5 5 99 --- 3
R03E | 457 5 1 4 24 3 | 8 8 14 11 9
R04E | 454 3 4 3 --- 2 | 4 4 7 --- 4
R06E |2622 50 1 247 --- 0 | 9 7 99 --- 7
XR07E |1569 --- 6 6 --- 6 | --- 17 20 --- 18
R08E | 496 4 5 6 --- 3 | 6 9 8 --- 7
R17 | 303 4 4 75 --- 4 | 8 7 66 --- 7
R18 | 262 3 3 4 --- 2 | 17 16 18 --- 17
R21 | 333 4 4 4 --- 3 | 5 6 7 --- 5
R22 | 475 5 4 6 46 4 | 8 11 9 33 8
R23 | 160 5 4 3 --- 3 | 4 10 11 --- 8
R24 | 429 3 4 3 20 2 | 4 7 7 7 5
------+--------------------------+----------------------
RMS | 899 15 4 75 32 |T 7 9 29 17 8
WRMS | 899 5 4 4 32 |NE 8 10 20 20 8
MEDI | 457 4 4 4 24 |MD 6 7 11 11 7
Table 3.1334.4 GPS week: 1334 Day: 4 MJD: 53586
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+--------------------------+----------------------
R01E | 572 3 3 4 --- 3 | 3 4 8 --- 4
R02E |1577 14 12 10 --- 8 | 6 4 99 --- 4
R03E | 476 4 2 4 12 2 | 4 4 9 5 4
R04E | 727 3 3 3 --- 2 | 5 9 7 --- 7
XR07E |2084 --- 5 5 --- 5 | --- 47 50 --- 48
R08E | 377 5 2 5 --- 3 | 5 7 9 --- 6
R17 | 170 6 5 157 --- 5 | 5 8 99 --- 6
R18 | 232 6 4 4 --- 3 | 25 20 22 --- 22
R21 | 721 5 3 2 --- 2 | 5 6 5 --- 4
R22 | 434 6 5 8 21 5 | 4 8 7 16 5
R23 | 272 6 5 3 --- 3 | 4 11 9 --- 8
R24 | 400 6 3 4 17 3 | 4 10 11 6 8
------+--------------------------+----------------------
RMS | 656 6 5 47 17 |T 6 12 30 9 11
WRMS | 656 6 4 6 17 |NE 8 11 26 11 9
MEDI | 434 6 3 4 17 |MD 5 8 9 6 6
Table 3.1334.5 GPS week: 1334 Day: 5 MJD: 53587
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+--------------------------+----------------------
R01E | 622 3 5 3 --- 3 | 4 6 5 --- 4
R03E | 245 4 6 5 14 3 | 5 9 9 3 6
R04E | 619 3 5 3 --- 2 | 3 6 3 --- 3
XR07E |---- --- 3 3 --- 3 | --- 32 34 --- 33
R08E | 530 2 6 6 --- 3 | 5 8 5 --- 5
R17 | 172 8 11 144 --- 9 | 5 14 99 --- 6
R18 | 285 4 3 7 --- 3 | 17 19 19 --- 18
R21 | 813 4 4 5 --- 3 | 5 8 3 --- 4
R22 | 270 3 3 7 23 3 | 5 5 7 8 4
R23 | 495 2 4 5 --- 3 | 6 7 7 --- 6
R24 | 204 5 3 6 17 3 | 6 9 10 4 8
------+--------------------------+----------------------
RMS | 474 4 5 46 19 |T 6 11 31 5 9
WRMS | 474 4 5 5 19 |NE 7 10 24 6 8
MEDI | 285 3 4 5 17 |MD 5 8 9 4 6
Table 3.1334.6 GPS week: 1334 Day: 6 MJD: 53588
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx mcc IGL | bkg cod esx mcc IGL
------+--------------------------+----------------------
R01E | 946 6 5 5 --- 4 | 4 6 5 --- 4
R03E | 368 5 6 8 19 4 | 7 6 9 6 6
R04E | 414 2 3 4 --- 2 | 8 7 9 --- 8
XR07E |---- --- 4 5 --- 4 | --- 33 31 --- 32
R08E | 917 3 3 5 --- 3 | 9 11 10 --- 9
R17 | 227 7 7 156 --- 7 | 6 12 86 --- 7
R18 | 402 4 2 7 --- 3 | 24 24 26 --- 24
R21 | 827 3 3 4 --- 2 | 5 7 7 --- 6
R22 | 503 4 2 5 49 3 | 9 7 9 14 7
R23 | 611 3 4 3 --- 2 | 7 10 9 --- 8
R24 | 147 3 4 3 25 2 | 6 11 8 5 8
------+--------------------------+----------------------
RMS | 599 4 4 50 33 |T 9 12 29 8 11
WRMS | 599 4 3 5 33 |NE 10 12 24 10 10
MEDI | 414 3 4 5 25 |MD 7 10 9 6 8
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