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[IGSREPORT-15369] Wk 1437 IGLOS Final Orbits
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IGS Electronic Report 13 Aug 02:06:44 PDT 2007 Message Number 15369
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Author: AC Coordinator / GFZ Potsdam
sum-file Version 2.0
IGLOS Orbit Combination - Week 1437 (Jul 22, 2007 - Jul 28, 2007)
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 2.1437.
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:
igl1437[0-6].sp3 IGLOS-PP Glonass ephemerides files for days 0-6
of GPS Week 1437 in the SP3 format.
igl14377.sum Combination Report for GPS Week 1437.
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 | 1019.2 ns
1 | 991.2 ns
2 | 1010.5 ns
3 | 1080.7 ns
4 | 1065.6 ns
5 | 1061.5 ns
6 | 1050.7 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 | COD | R15
0 | ESX | R23 R24
1 | COD | R15
1 | ESX | R23 R24
2 | COD | R15
2 | ESX | R23 R24
3 | COD | R15
3 | ESX | R23 R24
4 | COD | R15
4 | ESX | R23 R24
5 | COD | R15
5 | ESX | R23 R24
6 | COD | R15
6 | ESX | R23 R24
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 1.1437, 1a.1437).
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 2.1437.0-6)
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 3.1437.0-6).
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 1437 summary. (Jul 22, 2007 - Jul 28, 2007)
Table 1.1437.a GPS week : 1437 MJD: 54303.0-54309.0
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 54| -2 3 -19 -24 43 90 -.13 90 64 | 0 647 5532 6053
| 5 7 6 83 70 172 .23 | 0 1268
cod 168| 1 -10 17 31 -42 -57 -.31 60 53 | --- --- --- ---
| 3 9 9 48 58 70 .18 | --- ---
esx 46| -2 3 -5 147 -35 -84 -.55 173 64 | -183337 16124 13883 25163
| 4 5 12 119 173 67 .11 | 279733 55375
iac n/a| 0 2 5 -55 62 49 .54 44 44 | 1037784 2019 13494 25246
| 3 2 4 33 59 74 .12 | 30405 12764
Table 1.1437.b GPS week : 1437 MJD: 54303.0-54309.0
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
------+------------------------------------+------------------------------------------
R01E | 27 40 42 26 48 44 28 |
R03E | 35 31 41 54 37 31 54 |
R04E | 72 37 29 52 55 28 27 |
R06E | 33 31 36 35 26 28 41 |
R07E | 16 21 19 24 21 37 40 |
R08E | 38 29 56 45 26 27 18 |
R10 | 20 31 33 22 30 22 24 |
R14 | 17 18 21 17 16 21 22 |
R21 | 24 26 27 30 29 31 30 |
R23 | 28 55 66 33 31 26 38 |
R24 | 48 34 29 27 32 20 29 |
Table 1.1437.c GPS week : 1437 MJD: 54303.0-54309.0
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 1437 0 | 114 1953 -716 8445 -40960 -440000 47.1 17870 17870 | 1019191 0
brd 1437 1 | 51 1154 -505 3005 15530 -347200 82.0 16070 16070 | 991188 0
brd 1437 2 | -583 -385 -1147 2542 -7601 -310000 98.9 12800 12800 | 1010534 0
brd 1437 3 | 1065 490 -542 -16780 3192 -322700 97.3 13030 13030 | 1080708 0
brd 1437 4 | -762 -609 -108 -3127 -779 -342700 97.9 8048 8048 | 1065581 0
brd 1437 5 | 94 -224 -1069 -2876 -3880 -329500 86.1 6486 6486 | 1061461 0
brd 1437 6 | 470 81 26 11160 3854 -319100 98.9 8299 8299 | 1050663 0
-------------+------------------------------------------------------------+----------------
brd 1437 mean| 64 351 -580 338 -4377 -344457 86.9 11800 11800 | 1039903 0
brd 1437 sdev| 615 921 442 9221 17716 44095 18.8 4323 4323 | 33089 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 2.1437.0 GPS week: 1437 Day: 0 MJD: 54303
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 54| 5 11 -33 21 105 153 -.14 130 65 | 0 -238 8187 9453
cod 168| -2 -6 6 7 -123 -81 -.48 45 44 | --- --- --- ---
esx 46| 3 6 -4 174 15 -69 -.42 208 73 | -616595 50860 14618 21066
iac n/a| 0 4 8 -75 128 47 .59 46 46 | 1014139 4905 13740 23178
Table 2.1437.1 GPS week: 1437 Day: 1 MJD: 54304
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 54| -8 7 -19 -85 29 354 -.45 89 69 | 0 471 3940 4138
cod 168| 3 -14 19 -2 -102 -186 -.56 54 57 | --- --- --- ---
esx 46| -1 9 -10 283 -101 -68 -.66 184 72 | -196 34729 12287 27565
iac n/a| 5 3 1 -90 35 45 .58 37 37 | 987679 13723 11572 26622
Table 2.1437.2 GPS week: 1437 Day: 2 MJD: 54305
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 54| -4 10 -22 -135 14 188 -.21 63 59 | 0 1675 6651 7040
cod 168| -1 -28 25 118 45 -28 -.28 95 71 | --- --- --- ---
esx 46| -3 2 11 231 -49 -77 -.58 158 60 | 46372 -37275 15261 25801
iac n/a| 2 5 7 -99 115 -52 .49 51 51 | 1026855 -12057 15055 26061
Table 2.1437.3 GPS week: 1437 Day: 3 MJD: 54306
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 54| -2 -6 -18 95 60 27 .28 95 67 | 0 1218 6886 7533
cod 168| 0 -6 26 -20 2 22 -.46 68 62 | --- --- --- ---
esx 46| -4 -4 6 121 -157 -231 -.72 163 65 | 66808 -65856 13661 38829
iac n/a| -1 2 -3 -13 56 66 .63 45 45 | 1069503 -7834 14859 37929
Table 2.1437.4 GPS week: 1437 Day: 4 MJD: 54307
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 54| -8 0 -17 27 148 29 -.04 98 61 | 0 -1359 6158 6554
cod 168| 6 -2 16 2 -24 -60 -.11 47 45 | --- --- --- ---
esx 46| -2 4 -3 51 -206 -23 -.54 160 53 | -450238 88263 18501 25442
iac n/a| 0 0 7 -50 97 68 .58 52 52 | 1044033 23507 17545 24551
Table 2.1437.5 GPS week: 1437 Day: 5 MJD: 54308
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 54| -1 -5 -17 -101 -68 -205 -.30 83 73 | 0 297 3122 3459
cod 168| 1 -4 5 53 -48 11 -.14 44 45 | --- --- --- ---
esx 46| -9 9 -14 229 321 -69 -.53 168 67 | -339380 52862 12426 18524
iac n/a| 2 0 7 -39 -45 184 .62 38 38 | 1071673 -4961 11676 20435
Table 2.1437.6 GPS week: 1437 Day: 6 MJD: 54309
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 54| 1 3 -11 9 13 85 -.06 76 57 | 0 2465 3784 4198
cod 168| 2 -13 24 61 -46 -79 -.15 67 50 | --- --- --- ---
esx 46| 1 0 -26 -59 -68 -52 -.43 171 58 | 9867 -10713 10433 18914
iac n/a| -4 0 9 -23 50 -11 .30 37 37 | 1050609 -3144 10011 17951
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 3.1437.0 GPS week: 1437 Day: 0 MJD: 54303
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01E |13337 61 44 44 43 26 | 55 54 50 73 49
R03E |42357 85 45 33 75 34 | 80 80 71 76 63
R04E | 5821 338 54 51 46 72 | 131 50 50 46 34
R06E |19750 39 59 85 33 33 | 22 49 47 41 26
R07E |14804 39 25 29 21 15 | 23 28 36 39 23
R08E |13533 124 22 96 32 37 | 83 93 112 75 81
XR10 | 7098 38 21 --- 29 19 | 23 30 --- 46 33
XR14 | 6415 33 19 --- 23 16 | 38 44 --- 49 41
R21 | 5403 33 26 65 36 24 | 28 40 78 67 47
R23 | 4727 50 35 446 37 27 | 38 53 289 78 50
R24 | 4931 63 68 407 66 47 | 77 41 284 84 54
------+-------------------------------+---------------------------
RMS |17870 129 45 208 46 |T 54 51 113 61 45
WRMS |17870 65 44 73 46 |NE 40 41 217 64 45
MEDI | 7098 50 35 65 36 |MD 38 49 71 67 47
Table 3.1437.1 GPS week: 1437 Day: 1 MJD: 54304
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01E |12446 148 40 76 29 40 | 40 53 68 54 42
R03E |36580 91 55 39 41 31 | 39 72 72 63 56
R04E | 5500 131 67 29 30 36 | 69 64 59 38 41
R06E |21413 25 60 94 29 31 | 22 55 31 47 26
R07E | 6955 33 24 68 21 20 | 19 40 35 34 23
R08E |15252 101 44 53 17 29 | 163 82 123 121 114
XR10 | 2286 37 50 --- 40 30 | 21 32 --- 30 25
XR14 | 4426 38 23 --- 21 18 | 22 26 --- 45 32
R21 | 4835 36 32 82 28 25 | 53 47 44 74 54
R23 | 5519 73 88 347 71 55 | 32 51 146 70 33
R24 | 2977 69 50 392 37 34 | 44 74 201 39 38
------+-------------------------------+---------------------------
RMS |16074 89 54 184 37 |T 47 54 86 55 44
WRMS |16074 69 57 72 37 |NE 34 46 130 51 36
MEDI | 5519 69 50 76 29 |MD 39 53 68 47 38
Table 3.1437.2 GPS week: 1437 Day: 2 MJD: 54305
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01E | 8462 76 49 119 29 42 | 68 73 59 68 60
R03E |28645 90 78 33 66 41 | 47 57 53 59 36
R04E | 5427 34 98 46 34 29 | 122 85 116 77 77
R06E |15270 32 107 70 51 36 | 24 128 61 38 35
R07E | 4383 25 58 31 27 19 | 17 45 36 44 22
R08E |13764 84 183 92 51 55 | 110 211 141 82 93
XR10 | 4657 51 45 --- 42 32 | 22 39 --- 51 28
XR14 | 6451 30 41 --- 24 21 | 20 30 --- 47 30
R21 | 5656 31 76 63 24 26 | 33 48 47 35 27
R23 | 6332 91 82 300 98 66 | 41 56 127 92 34
R24 | 6216 48 41 313 35 29 | 53 74 194 52 49
------+-------------------------------+---------------------------
RMS |12798 63 95 158 51 |T 50 76 92 58 44
WRMS |12798 59 71 60 51 |NE 33 49 122 55 33
MEDI | 6332 48 76 70 35 |MD 41 57 61 52 35
Table 3.1437.3 GPS week: 1437 Day: 3 MJD: 54306
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01E | 6223 61 58 42 27 26 | 61 72 83 58 46
R03E |32787 147 64 66 95 54 | 111 124 111 107 93
R04E | 4369 187 65 72 28 52 | 45 99 139 96 95
R06E | 9439 48 62 83 41 34 | 24 48 66 44 29
R07E | 3503 47 57 33 32 24 | 20 35 49 46 24
R08E |14412 86 121 59 42 44 | 83 165 131 127 114
XR10 | 5926 35 29 --- 29 21 | 21 28 --- 28 21
XR14 | 8085 32 26 --- 18 17 | 19 25 --- 31 22
R21 | 3645 70 55 57 28 29 | 40 39 51 53 36
R23 | 4731 49 46 322 45 32 | 47 59 152 39 40
R24 | 7155 42 53 330 22 27 | 48 137 217 93 92
------+-------------------------------+---------------------------
RMS |13033 95 68 163 45 |T 47 75 111 65 55
WRMS |13033 67 62 65 45 |NE 35 57 140 48 42
MEDI | 6223 49 57 66 29 |MD 45 59 111 53 40
Table 3.1437.4 GPS week: 1437 Day: 4 MJD: 54307
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01E | 5823 158 49 78 56 47 | 82 123 107 84 93
R03E |15033 62 78 27 73 36 | 81 91 93 114 88
R04E | 3948 202 40 67 73 54 | 102 92 116 74 85
R06E | 4491 70 47 35 33 26 | 24 70 68 42 41
R07E | 3319 29 38 36 39 21 | 21 39 60 58 33
R08E |15417 33 49 52 37 26 | 156 151 166 173 161
XR10 | 6129 56 25 --- 50 30 | 28 32 --- 34 21
XR14 | 4555 24 14 --- 28 15 | 16 29 --- 29 16
R21 | 3130 79 30 43 52 28 | 41 44 72 69 37
R23 | 2083 37 38 341 51 30 | 31 35 151 40 27
R24 | 4935 59 42 311 39 32 | 78 124 151 90 100
------+-------------------------------+---------------------------
RMS | 8047 98 47 160 52 |T 60 75 109 73 63
WRMS | 8047 61 45 53 52 |NE 38 52 124 52 40
MEDI | 4555 59 40 52 50 |MD 41 70 107 69 41
Table 3.1437.5 GPS week: 1437 Day: 5 MJD: 54308
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01E | 7617 169 25 58 55 44 | 79 73 91 56 61
R03E | 3686 70 49 62 41 30 | 88 66 93 92 77
R04E | 4048 51 57 43 40 27 | 65 99 129 81 84
R06E | 4791 95 44 44 20 28 | 33 31 65 47 33
R07E | 5647 34 77 84 44 36 | 13 39 89 43 27
R08E |12511 68 43 53 33 27 | 84 151 131 112 118
XR10 | 6206 37 28 --- 30 21 | 24 36 --- 51 35
XR14 | 4305 40 21 --- 31 21 | 18 23 --- 42 25
R21 | 4898 88 19 88 27 31 | 25 61 105 48 48
R23 | 3176 47 28 343 38 26 | 56 36 100 38 35
R24 | 6716 35 25 327 28 20 | 29 49 109 36 37
------+-------------------------------+---------------------------
RMS | 6485 83 44 168 38 |T 46 60 101 58 52
WRMS | 6485 73 45 67 38 |NE 30 41 104 43 36
MEDI | 4898 51 28 62 33 |MD 33 49 100 48 37
Table 3.1437.6 GPS week: 1437 Day: 6 MJD: 54309
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01E | 7944 47 76 37 37 28 | 95 132 107 114 110
R03E |11250 163 94 56 50 54 | 95 116 76 97 79
R04E | 8280 65 54 36 32 26 | 79 82 85 70 59
R06E |11218 72 108 75 40 41 | 48 61 76 43 37
R07E | 2790 34 70 117 46 39 | 20 36 53 36 25
R08E |11232 19 37 47 20 17 | 146 159 157 143 147
XR10 | 6219 25 46 --- 29 23 | 28 38 --- 50 36
XR14 | 7796 15 54 --- 18 21 | 20 50 --- 26 26
R21 | 8224 57 47 85 20 30 | 44 29 83 42 33
R23 | 4423 78 48 356 38 37 | 100 39 189 43 43
R24 | 3819 60 20 318 35 28 | 65 82 209 85 80
------+-------------------------------+---------------------------
RMS | 8299 76 67 171 37 |T 67 74 115 68 61
WRMS | 8299 57 50 58 37 |NE 51 47 160 49 43
MEDI | 7944 57 54 75 35 |MD 65 61 85 50 43