[IGSREPORT-15118] Wk 1425 IGLOS Final Orbits
Gerd Gendt3
igsacc at gfz-potsdam.de
Fri May 25 06:53:35 PDT 2007
******************************************************************************
IGS Electronic Report 25 May 06:53:46 PDT 2007 Message Number 15118
******************************************************************************
Author: AC Coordinator / GFZ Potsdam
sum-file Version 2.0
IGLOS Orbit Combination - Week 1425 (Apr 29, 2007 - May 05, 2007)
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 2.1425.
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:
igl1425[0-6].sp3 IGLOS-PP Glonass ephemerides files for days 0-6
of GPS Week 1425 in the SP3 format.
igl14257.sum Combination Report for GPS Week 1425.
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 | 889.1 ns
1 | 892.0 ns
2 | 914.5 ns
3 | 939.9 ns
4 | 900.8 ns
5 | 899.4 ns
6 | 902.0 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 | ESX | ALL
1 | ESX | ALL
3 | COD | R15
4 | COD | R15
4 | ESX | R23
5 | COD | R15
5 | ESX | R24
5 | IAC | R07
6 | COD | R15 R24
6 | ESX | R07 R23
6 | IAC | R07
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 1.1425, 1a.1425).
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 2.1425.0-6)
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 3.1425.0-6).
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 1425 summary. (Apr 29, 2007 - May 05, 2007)
Table 1.1425.a GPS week : 1425 MJD: 54219.0-54225.0
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.
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]
--------+----------------------------------------------------+------------------------------
bkg 56| 0 0 2 104 -28 16 -.08 35 29 | 0 726 5666 6136
| 2 1 1 36 23 173 .08 | 0 1457
cod 169| -2 0 4 108 -82 35 -.10 44 36 | --- --- --- ---
| 5 4 2 14 56 116 .05 | --- ---
esx 44| 7 0 -12 72 99 -210 -.32 175 76 | -324067 -987 16432 28192
| 14 3 15 119 121 519 .23 | 664771 28659
iac n/a| 0 1 -3 -231 81 -65 .22 65 65 | 918108 -4258 14487 26802
| 0 2 4 20 48 119 .07 | 29466 24967
Table 1.1425.b GPS week : 1425 MJD: 54219.0-54225.0
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
------+------------------------------------+------------------------------------------
R01 | 19 19 38 44 16 15 24 |
R03 | 25 19 20 24 25 20 21 |
R04 | 16 15 14 17 28 20 15 |
R06 | 27 26 21 32 28 24 28 |
R07 | 26 16 47 16 17 111 --- |
R08 | 17 23 19 48 21 20 17 |
R10 | 22 19 16 16 17 26 16 |
R14 | 26 24 18 11 17 18 12 |
R18 | 32 39 31 41 28 26 27 |
R19 | 18 20 17 17 17 16 18 |
R21 | 29 27 57 56 20 19 27 |
R22 | 46 49 54 37 43 39 27 |
R23 | 28 24 56 56 26 66 34 |
Table 1.1425.c GPS week : 1425 MJD: 54219.0-54225.0
Daily transformation of broadcast orbits (brd) to the combined IGL orbit.
Mean and standard deviations of the transformation parameters for the
whole gpsweek.
CEN WEEK DAY | DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm] | [ps] [ps/d]
-------------+------------------------------------------------------------+----------------
brd 1425 0 | -201 311 284 -5582 2865 -351200 89.8 6552 6552 | 889143 0
brd 1425 1 | 210 42 -114 -7100 11870 -365500 97.2 8304 8304 | 891993 0
brd 1425 2 | -40 -276 -460 87 4420 -355500 85.5 8785 8785 | 914460 0
brd 1425 3 | 309 53 -380 5182 -732 -361500 90.9 9635 9635 | 939861 0
brd 1425 4 | -571 10 9 -4303 -2126 -353100 75.6 7737 7737 | 900775 0
brd 1425 5 | -718 374 -3 -6213 8226 -358200 93.0 8465 8465 | 899386 0
brd 1425 6 | 563 -491 -59 6617 -4088 -357700 81.9 8872 8872 | 902011 0
-------------+------------------------------------------------------------+----------------
brd 1425 mean| -64 3 -103 -1615 2919 -357528 87.7 8335 8335 | 905375 0
brd 1425 sdev| 468 305 251 5642 5750 4891 7.3 977 977 | 17237 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.
Table 2.1425.0 GPS week: 1425 Day: 0 MJD: 54219
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]
--------+----------------------------------------------------+------------------------------
bkg 56| -4 0 0 122 -28 283 -.16 33 31 | 0 2882 6424 6879
cod 169| 0 -3 5 139 -23 -73 -.17 43 30 | --- --- --- ---
iac n/a| 0 1 -7 -224 5 -240 .22 35 35 | 893249 -9219 12967 23805
Table 2.1425.1 GPS week: 1425 Day: 1 MJD: 54220
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]
--------+----------------------------------------------------+------------------------------
bkg 56| 0 0 5 110 -25 -138 -.18 28 24 | 0 1412 4007 4375
cod 169| -1 -2 5 110 -54 206 -.02 41 31 | --- --- --- ---
iac n/a| 0 5 -9 -264 92 -76 .24 43 43 | 878033 -8308 10468 26903
Table 2.1425.2 GPS week: 1425 Day: 2 MJD: 54221
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]
--------+----------------------------------------------------+------------------------------
bkg 56| -1 0 2 81 -49 237 -.13 37 33 | 0 -1793 5557 5773
cod 169| 4 2 4 108 -79 78 -.07 31 28 | --- --- --- ---
esx 44| -1 -2 -25 -120 137 -604 -.64 220 98 | 513128 -18515 15882 22069
iac n/a| 1 0 -7 -216 84 -215 .30 37 37 | 892965 6904 14735 20766
Table 2.1425.3 GPS week: 1425 Day: 3 MJD: 54222
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]
--------+----------------------------------------------------+------------------------------
bkg 56| 0 -1 3 131 -32 -14 -.11 30 30 | 0 -5 6273 7055
cod 169| -6 -2 3 102 -150 118 -.05 38 38 | --- --- --- ---
esx 44| 31 5 -30 148 245 -922 -.48 263 145 | -168165 42649 11757 31363
iac n/a| 0 0 2 -243 152 14 .28 38 38 | 932400 41734 11741 30620
Table 2.1425.4 GPS week: 1425 Day: 4 MJD: 54223
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]
--------+----------------------------------------------------+------------------------------
bkg 56| 1 0 0 99 -63 -140 -.01 28 26 | 0 217 5491 6154
cod 169| -7 3 0 108 -156 -77 -.13 45 45 | --- --- --- ---
esx 44| 12 -1 6 101 158 217 -.11 127 50 | 34700 12385 19033 30363
iac n/a| -1 0 -4 -240 74 66 .09 36 36 | 945278 801 17314 29710
Table 2.1425.5 GPS week: 1425 Day: 5 MJD: 54224
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]
--------+----------------------------------------------------+------------------------------
bkg 56| 3 -2 0 36 -8 -77 .01 54 24 | 0 1021 6030 6455
cod 169| -7 6 7 91 -14 88 -.12 66 35 | --- --- --- ---
esx 44| 2 2 -8 183 -66 170 -.19 124 56 | -999999 -13111 19595 25472
iac n/a| 0 1 -2 -199 119 -26 .17 236 236 | 953121 -33905 18829 26686
Table 2.1425.6 GPS week: 1425 Day: 6 MJD: 54225
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]
--------+----------------------------------------------------+------------------------------
bkg 56| 0 3 3 149 4 -35 .01 36 34 | 0 1353 5885 6264
cod 169| 2 -2 4 100 -98 -88 -.12 46 44 | --- --- --- ---
esx 44| -5 -1 -4 49 25 85 -.18 143 29 | -999999 -28343 15893 31695
iac n/a| 1 -2 0 -228 41 19 .26 31 31 | 931712 -27814 15361 29127
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: mm.
Table 3.1425.0 GPS week: 1425 Day: 0 MJD: 54219
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod iac IGL | bkg cod iac IGL
------+--------------------------+----------------------
R01 | 4873 22 26 30 18 | 34 52 60 45
R03 | 7236 28 47 27 24 | 35 56 47 44
R04 | 4568 19 22 26 16 | 33 33 37 30
R06 | 1503 32 47 33 26 | 38 73 52 43
R07 | 5847 30 50 29 26 | 51 79 158 47
R08 | 7869 27 28 15 17 | 41 55 49 43
R10 | 4224 21 32 37 21 | 26 27 35 24
R14 | 2859 27 38 44 26 | 46 48 23 34
R18 | 4873 46 48 40 31 | 322 332 333 327
R19 |16386 22 29 25 18 | 59 51 55 51
R21 | 4161 48 45 26 28 | 24 41 40 24
R22 | 4210 54 77 62 45 | 51 111 113 73
R23 | 3056 35 42 40 27 | 58 68 68 52
------+--------------------------+----------------------
RMS | 6551 33 43 35 |T 62 78 82 64
WRMS | 6551 31 30 35 |NE 62 78 82 64
MEDI | 4568 28 42 30 |MD 41 55 52 44
Table 3.1425.1 GPS week: 1425 Day: 1 MJD: 54220
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod iac IGL | bkg cod iac IGL
------+--------------------------+----------------------
R01 | 6360 19 35 25 18 | 46 49 52 45
R03 |11965 27 21 31 19 | 36 59 60 45
R04 | 8404 13 20 28 14 | 29 25 35 20
R06 | 8026 19 42 47 25 | 48 59 32 33
R07 |14686 17 11 34 15 | 55 38 136 39
R08 | 2880 25 25 47 23 | 48 62 41 45
R10 | 6059 19 19 40 18 | 30 23 22 19
R14 | 3686 23 47 28 23 | 30 59 20 31
R18 | 4762 55 56 49 38 | 234 265 258 248
R19 |15111 13 35 33 19 | 65 66 49 52
R21 | 2984 37 33 43 27 | 31 53 28 25
R22 | 3862 39 90 77 48 | 73 50 87 56
R23 | 5349 23 33 45 23 | 65 46 46 49
------+--------------------------+----------------------
RMS | 8304 28 41 43 |T 60 65 66 54
WRMS | 8304 24 31 43 |NE 60 65 66 54
MEDI | 6059 23 33 40 |MD 48 53 46 45
Table 3.1425.2 GPS week: 1425 Day: 2 MJD: 54221
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01 | 4589 25 16 268 27 38 | 59 46 366 50 56
R03 |12885 27 22 98 27 19 | 33 55 221 43 39
R04 |12468 20 19 49 28 14 | 43 31 207 33 27
R06 | 6541 28 29 96 27 20 | 28 45 190 26 23
R07 |10187 22 40 319 29 46 | 75 48 638 115 65
R08 | 3815 30 18 100 20 18 | 79 45 322 62 58
XR10 | 8900 17 21 --- 27 16 | 32 25 --- 27 22
XR14 | 3485 20 27 --- 28 18 | 30 56 --- 24 31
R18 | 5758 74 34 52 51 31 | 260 266 331 272 268
R19 |11349 20 30 50 32 17 | 43 54 190 28 33
R21 | 2708 56 41 389 20 57 | 30 57 482 37 35
XR22 | 2515 49 85 --- 82 53 | 64 69 --- 95 41
R23 | 9937 34 42 350 74 55 | 45 67 227 94 56
------+-------------------------------+---------------------------
RMS | 8784 37 31 220 37 |T 63 66 317 69 58
WRMS | 8784 33 28 98 37 |NE 63 66 317 69 58
MEDI | 6541 27 29 98 28 |MD 43 54 227 43 39
Table 3.1425.3 GPS week: 1425 Day: 3 MJD: 54222
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01 | 5934 35 19 334 16 43 | 30 50 313 32 33
R03 |20318 26 31 132 32 23 | 42 59 139 57 51
R04 |13053 20 22 95 18 16 | 42 36 154 31 31
R06 | 8366 31 72 89 45 31 | 30 82 138 29 23
R07 |11627 23 21 84 22 16 | 68 45 452 159 56
R08 | 2471 27 46 356 27 48 | 59 45 383 49 58
XR10 | 4965 14 23 --- 30 16 | 25 26 --- 29 20
XR14 | 5198 15 15 --- 13 10 | 28 41 --- 29 23
R18 | 6091 36 38 274 50 41 | 224 232 210 222 222
R19 | 4281 27 20 86 19 16 | 38 55 280 53 40
R21 | 4764 42 34 423 29 56 | 33 65 308 46 43
XR22 | 5432 53 27 --- 69 37 | 56 59 --- 89 49
R23 | 4528 25 44 387 74 55 | 64 55 285 90 51
------+-------------------------------+---------------------------
RMS | 9635 30 38 263 38 |T 56 65 266 70 53
WRMS | 9635 30 38 145 38 |NE 56 65 266 70 53
MEDI | 5432 27 27 132 29 |MD 42 55 280 49 43
Table 3.1425.4 GPS week: 1425 Day: 4 MJD: 54223
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01 | 8911 25 18 43 17 15 | 40 43 130 29 32
R03 | 9309 11 55 47 54 24 | 44 41 65 41 38
R04 | 9581 22 68 82 15 28 | 39 48 90 38 42
R06 | 8613 27 68 38 58 28 | 33 48 81 35 28
R07 |10178 19 21 52 21 16 | 102 40 735 272 51
R08 | 2589 32 37 50 29 21 | 58 53 103 42 46
XR10 | 4494 20 25 --- 28 17 | 28 35 --- 31 24
XR14 | 4617 23 27 --- 20 16 | 42 38 --- 36 36
R18 | 6312 46 40 57 49 27 | 253 269 141 256 253
R19 | 2588 31 29 30 25 17 | 31 45 175 43 30
R21 | 9348 22 38 49 33 20 | 40 62 194 54 50
XR22 | 6907 59 48 --- 71 43 | 133 103 --- 98 103
R23 | 4726 31 51 371 29 25 | 48 52 199 50 45
------+-------------------------------+---------------------------
RMS | 7737 28 45 127 36 |T 68 67 191 78 59
WRMS | 7737 26 45 50 36 |NE 68 67 191 78 59
MEDI | 6907 25 38 49 29 |MD 42 48 130 42 42
Table 3.1425.5 GPS week: 1425 Day: 5 MJD: 54224
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01 |13000 19 36 33 19 15 | 36 54 202 32 33
R03 | 9727 16 35 48 42 19 | 35 36 104 45 34
R04 | 6732 22 39 50 36 20 | 43 35 79 28 32
R06 | 6692 30 36 85 37 24 | 45 39 154 31 32
R07 | 8905 149 164 162 741 110 | 182 46 9999 545 100
R08 | 1947 11 37 77 26 19 | 61 45 118 47 50
XR10 | 4808 25 33 --- 48 25 | 36 31 --- 40 28
XR14 |10761 27 25 --- 22 18 | 45 35 --- 24 30
R18 | 6192 42 45 35 50 26 | 264 250 169 253 253
R19 | 1455 23 28 31 30 15 | 51 50 167 34 42
R21 | 7427 16 28 80 19 18 | 43 47 249 45 39
XR22 | 5039 64 40 --- 54 39 | 62 92 --- 78 65
R23 |13567 48 85 317 45 66 | 67 82 146 47 48
------+-------------------------------+---------------------------
RMS | 8465 54 66 124 236 |T 74 64 154 96 60
WRMS | 8465 24 35 56 236 |NE 74 64 154 96 60
MEDI | 6732 25 36 50 37 |MD 45 46 154 45 39
Table 3.1425.6 GPS week: 1425 Day: 6 MJD: 54225
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01 |15665 47 32 58 21 23 | 37 57 151 31 36
R03 |10270 24 39 39 41 21 | 35 33 123 43 32
R04 | 3529 13 37 16 32 15 | 34 39 96 33 30
R06 | 9435 29 33 82 35 27 | 35 41 165 23 35
R08 | 3263 39 31 19 21 16 | 57 48 144 35 40
XR10 | 5373 21 28 --- 18 15 | 38 25 --- 32 27
XR14 | 9866 17 14 --- 19 12 | 31 30 --- 28 27
R18 | 5831 45 72 33 31 27 | 313 318 202 316 313
R19 | 3522 19 51 14 30 17 | 46 61 176 55 45
R21 | 2840 39 44 67 36 27 | 38 65 239 46 42
XR22 | 3714 41 22 --- 42 26 | 84 99 --- 125 98
R23 |13816 53 61 407 29 34 | 73 88 180 93 77
------+-------------------------------+---------------------------
RMS | 8871 36 46 143 31 |T 68 75 164 133 66
WRMS | 8871 34 44 29 31 |NE 68 75 164 133 66
MEDI | 5373 29 33 39 30 |MD 38 48 165 43 36
More information about the IGSREPORT
mailing list