[IGSREPORT-16346] Wk 1482 IGS SINEX Combination
IGS SINEX
sinex at geod.nrcan.gc.ca
Wed Jun 18 17:50:00 PDT 2008
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IGS Electronic Report 18 Jun 17:50:04 PDT 2008 Message Number 16346
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Author: R. Ferland, M. Piraszewski
===============================================================
Combined AC solution for GPS week 1482 - 08/06/01 to 08/06/07
===============================================================
1) Contacts:
============
e-mail: rferland at nrcan.gc.ca
Tel: (613)995-4002 (Remi Ferland)
Fax: (613)995-3215
2) Products:
============
All products are available at:
CDDIS (cddis.gsfc.nasa.gov) and SOPAC (garner.ucsd.edu)
igs08P1482.snx Combined weekly solution.
igs08P1482.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS08P23.snx Cumulative Combined solution.
igs08P1482.sum This file.
igs08P1482.itr Residuals between the AC and the IGS05 for the RF stations.
igs08P1482.res Residuals between the AC and the Combined Weekly solution.
IGS08P23.res Residuals between the AC and the Cumulative Combined solution.
Where IGSyyPww & igsyyPwwww represent:
yy Last 2 digits of the year
ww week in year yy
wwww GPS week
P GPS technique used
3) Combination Strategy:
========================
The AC solutions are processed using the following procedure:
3-1) The AC solutions are checked/corrected for possible format problems,
station names inconsistencies, etc...
3-2) The AC solutions are unconstrained according to the information provided
in the SOLUTION/APRIORI Block.
3-3) The AC solutions are aligned (using a 7-parameters) and compared to the
IGS05 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS05.snx
3-4) The AC are compared to IGS05, to each other, to the previous week
solution and to the cumulative solution in order to identify and remove
outliers.
3-5) The weekly AC solutions are combined and added to the cumulative
combined solution. The cumulative combination is done to ensures 14
parameters singularity.
The weekly combined solution is aligned to the IGS05 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGS05 of the reference epoch
using a 14-parameters transformation and the 132 ITRF station positions
and velocities. The IGS05 is a realization of ITRF2005.
For more details, see:
Blewitt, G., C. Boucher and J. Kouba, 1997, Procedure for ITRF continuous
realization, the report of the IGS GB, presented to the IGS Governing
Board Meeting held in San Francisco, Dec. 11.
Kouba, J., J. Ray and M.M. Watkins, IGS Reference Frame Realization, 1998
IGS Analysis Center Workshop Proceedings, European Space Operations
Centre, Darmstadt, Germany.
The combination software was developed at NRCan.
4) Remarks:
===========
ITR = IGS05.snx
igs = igs08P1482.snx
IGS = IGS08P23.snx
MIT = mit14827.snx
mit = mit1482g.snx
BuA = IERS Bulletin A
grg mit are used to quality control the weekly combination.
gfz excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
From the original solution:
cod SATA X Y Z
emr SATA X Y Z
gfz SATA X Y Z
MIT SATA X Y Z
sio SATA X Y Z
mit SATA X Y Z
After unconstraining:
jpl REYK
MIT BAHR BHR1 S051
ngs REYK URUM
sio REYK
grg FAIR NTUS REYK YSSK
New stations in the cumulative solution IGS08P23.snx
ADE1 A 1 BHR1 A 1 BUE1 A 1 EIL1 A 1 HRM1 A 1 OSN1 A 1
PRE1 A 1 PTIR A 1 QUI1 A 1 TAH1 A 1 WDC1 A 1 WEL1 A 1
4-1) Starting with GPS week 1400, the solutions are aligned to the
IGS05.snx realization of ITRF2005.
4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
is included in the erp files.
4-3) Starting with GPS week 1412, the accumulated ERP file has been
changed from "igs00p02.erp" to "igs00p03.erp". The main changes
are:
1) Correction of the pole position from IGb00 to IGS05 using the
transformation in:
http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00178.html
2) Marginal ERP's in GPS week 1161 were replaced by reprocessed
values.
5) Results:
===========
5-1) AC (Variance Factor)^0.5 estimates:
=============================================
The residuals used in the estimation of the Variance Factor
are the differences between the cumulative combined solution
and each AC weekly solution.
SF = (Variance Factor)^0.5 = (Chi^2/dof)^0.5
Final(SF) = Apriori(SF) * Aposteriori(SF)
Solution |# sta| #RF | Apriori(SF)|Aposteriori(SF)| Final(SF)|
---------------|-----|-----|---------------|---------------|---------------|
cod | 186 | 85 | 18.416 | 1.000 | 18.421 |
emr | 70 | 46 | 4.287 | 1.000 | 4.288 |
esa | 118 | 61 | 4.611 | 1.000 | 4.613 |
gfz | 179 | 83 | 12.595 | 1.000 | 12.600 |
jpl | 117 | 66 | 5.517 | 1.000 | 5.518 |
MIT | 252 | 94 | 2.779 | 1.000 | 2.780 |
ngs | 206 | 93 | 33.793 | 1.000 | 33.799 |
sio | 250 | 90 | 2.041 | 1.000 | 2.041 |
grg | 80 | 49 | 11.842 | 1.000 | 11.843 |
mit | 392 | 90 | 1.492 | 0.991 | 1.478 |
igs | 341 | 95 | 1.390 | 0.999 | 1.388 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD:
====================================================
5-2-1) With respect to the IGS05 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 85 | -0.1 -0.1 -0.1 | 2.8 2.9 9.5 |
emr 46 | -1.1 -0.1 -0.3 | 3.2 2.6 11.5 |
esa 61 | -0.3 0.1 -0.1 | 3.4 2.7 10.3 |
gfz 83 | -0.2 0.0 -0.1 | 2.3 2.4 8.9 |
jpl 66 | 0.3 -0.2 -0.1 | 3.0 3.0 9.7 |
MIT 94 | 0.3 0.1 0.4 | 2.8 2.6 9.6 |
ngs 93 | 0.1 0.2 -0.2 | 3.2 3.0 9.2 |
sio 90 | 0.5 0.1 0.0 | 2.8 2.7 8.2 |
grg 49 | 0.9 0.1 0.0 | 2.6 1.0 6.7 |
mit 90 | 0.2 0.0 0.2 | 2.4 2.4 8.5 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 182 | 0.1 -0.1 -0.2 | 1.1 1.0 3.1 |
emr 70 | -1.2 -0.2 0.1 | 2.3 1.6 5.7 |
esa 115 | -0.3 -0.3 -1.0 | 2.2 1.3 3.2 |
gfz 176 | -0.1 0.0 -0.4 | 1.0 1.1 2.8 |
jpl 116 | 1.0 -0.1 1.1 | 1.9 2.6 5.0 |
MIT 224 | 0.2 0.0 0.5 | 1.2 1.5 3.5 |
ngs 192 | 0.1 0.3 -0.4 | 2.4 2.3 3.7 |
sio 244 | 0.8 0.3 -0.1 | 1.2 1.4 3.2 |
grg 79 | 1.1 -0.3 0.6 | 2.7 2.9 7.7 |
mit 325 | 0.3 0.0 -0.1 | 0.6 0.6 1.5 |
ITR 94 | 0.1 -0.1 -0.1 | 2.3 2.2 8.2 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 170 | -0.3 0.0 -0.2 | 1.7 1.8 6.0 |
emr 67 | -1.6 -0.2 0.5 | 2.8 1.7 8.1 |
esa 103 | -0.9 0.0 -0.5 | 2.6 2.2 7.3 |
gfz 166 | -0.5 0.2 0.1 | 1.5 1.8 5.3 |
jpl 109 | 0.4 0.1 1.1 | 2.5 2.6 6.1 |
MIT 199 | 0.0 0.1 1.1 | 1.8 2.3 6.3 |
ngs 160 | -0.3 0.3 -0.3 | 2.4 2.7 5.8 |
sio 207 | 0.5 0.4 0.0 | 1.9 1.9 5.0 |
grg 78 | 0.9 -0.1 0.6 | 2.7 3.0 7.3 |
mit 242 | 0.0 0.2 0.1 | 1.4 1.5 4.8 |
igs 253 | -0.3 0.1 0.1 | 1.1 1.4 4.5 |
ITR 127 | 0.0 -0.1 -0.1 | 2.8 2.0 7.7 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS05.snx
=========================================================
5-3-1) Estimates:
====================
Solution | R X R Y R Z T X T Y T Z SCL |
| (mas) (mas) (mas) (mm) (mm) (mm) (ppb) |
---------------|---------------------------------------------------------------|
cod | -0.016 -0.017 -0.013 0.7 0.4 0.2 -0.15 |
emr | 0.056 -0.007 0.018 -8.1 -12.1 -2.9 0.15 |
esa | 0.021 0.000 -0.025 0.0 0.0 0.0 -0.06 |
gfz | 0.008 -0.011 -0.006 0.8 0.2 1.3 -0.27 |
jpl | -0.025 -0.011 -0.029 -2.4 -12.4 -12.2 -0.03 |
MIT | -0.007 0.009 -0.008 4.5 -8.0 1.5 -0.10 |
ngs | -0.025 -0.096 0.023 6.2 -2.3 0.0 -1.19 |
sio | -0.121 -0.055 0.016 0.6 -7.1 -9.8 0.35 |
grg | -0.026 -0.033 -0.008 8.1 3.5 -5.0 0.02 |
mit | -0.015 0.010 -0.009 -0.6 0.0 0.0 -0.07 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.17 |
---------------|---------------------------------------------------------------|
5-3-2) STD:
==============
Solution | R X R Y R Z T X T Y T Z SCL |
| (mas) (mas) (mas) (mm) (mm) (mm) (ppb) |
---------------|---------------------------------------------------------------|
cod | 0.044 0.045 0.049 1.2 1.2 1.1 0.18 |
emr | 0.057 0.058 0.068 1.5 1.5 1.5 0.24 |
esa | 0.049 0.053 0.056 1.3 1.3 1.3 0.21 |
gfz | 0.044 0.045 0.049 1.2 1.2 1.2 0.18 |
jpl | 0.051 0.053 0.054 1.4 1.4 1.3 0.21 |
MIT | 0.042 0.043 0.046 1.1 1.1 1.1 0.17 |
ngs | 0.042 0.044 0.047 1.1 1.1 1.1 0.17 |
sio | 0.043 0.044 0.047 1.1 1.1 1.1 0.18 |
grg | 0.056 0.058 0.069 1.5 1.5 1.5 0.24 |
mit | 0.043 0.044 0.048 1.1 1.1 1.1 0.18 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.46 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 3.6 -3.2 -3.4 | 1.0 0.6 2.3 |
---------------|---------------------------|---------------------------|
5-5) ERP Residuals Weighted Average & STD:
===============================================
5-5-1) Weighted Average:
===========================
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- -2.6 3.9 13.9 3.9 25.5 |
esa | --- -8.6 -1.4 -6.7 -1.3 -8.0 |
gfz | --- -3.1 -4.6 -6.4 -1.9 -7.2 |
jpl | --- 21.1 0.3 4.6 0.5 0.2 |
MIT | --- 7.9 1.8 19.1 0.1 0.5 |
ngs | --- -9.3 -0.1 -21.9 -5.5 -1.7 |
sio | --- 3.7 -1.4 --- 6.2 --- |
grg | --- 5.2 -0.7 -7.1 -0.2 -15.0 |
mit | --- 44.7 -3.3 -6.6 3.6 -16.2 |
ITR | --- --- --- --- --- --- |
BuA | --- 0.1 0.7 -6.0 0.8 -14.7 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 5.5 3.6 16.4 1.7 7.6 |
esa | --- 13.6 1.5 8.2 1.5 7.2 |
gfz | --- 10.7 1.9 8.4 1.2 5.1 |
jpl | --- 19.1 2.0 12.0 1.1 9.5 |
MIT | --- 8.2 3.7 16.5 1.1 9.5 |
ngs | --- 21.0 2.6 19.9 4.2 15.4 |
sio | --- 4.7 2.8 --- 2.6 --- |
grg | --- 47.6 4.3 13.8 2.4 8.1 |
mit | --- 4.6 2.8 14.9 2.5 9.4 |
ITR | --- --- --- --- --- --- |
BuA | --- 22.8 4.5 15.4 2.6 9.0 |
---------------|------------------------------------------------------------|
5-6) Satellite Antenna Offset Residuals weighted Average & STD:
====================================================================
No Satellite phase center ...
5-7) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF_IGS05.snx cod14827.snx |VESL A 1| 3.8 -1.9 -27.6|
ITRF_IGS05.snx cod14827.snx |YAR1 A 2| 1.9 0.5 31.1|
| | |
ITRF_IGS05.snx gfz14827.snx |BRAZ A 1| 1.3 10.9 4.1|
ITRF_IGS05.snx gfz14827.snx |GUAM A 4| -11.3 -3.6 1.5|
ITRF_IGS05.snx gfz14827.snx |TIXI A 1| -9.4 0.9 -7.2|
| | |
ITRF_IGS05.snx MIT14827.snx |VESL A 1| 2.3 -2.8 -32.5|
| | |
ITRF_IGS05.snx mit1482g.snx |BRAZ A 1| 0.2 9.0 8.8|
ITRF_IGS05.snx mit1482g.snx |CAS1 A 3| 0.9 1.4 -18.5|
ITRF_IGS05.snx mit1482g.snx |GUAM A 4| -10.0 -4.5 -1.4|
ITRF_IGS05.snx mit1482g.snx |VESL A 1| 2.2 -1.5 -26.9|
| | |
IGS08P22.snx cod14827.snx |MOBJ A 1| 0.6 2.0 31.7|
IGS08P22.snx cod14827.snx |REYK A 4| 0.0 2.2 25.9|
| | |
IGS08P22.snx gfz14827.snx |NIUM A 1| -24.5 38.0 -0.1|
| | |
IGS08P22.snx MIT14827.snx |HCRO A 2| -4.8 9.6 43.0|
| | |
IGS08P22.snx mit1482g.snx |MADR A 1| -21.4 -29.0 -13.7|
| | |
IGS08P22.snx mit1482g.snx |NIUM A 1| -23.4 37.7 -0.8|
| | |
IGS08P22.snx igs08P1482.snx |NISU A 1| 7.9 4.6 2.2|
IGS08P22.snx igs08P1482.snx |REYK A 4| -0.2 3.8 25.9|
IGS08P22.snx igs08P1482.snx |TIXI A 1| -6.8 0.7 1.2|
IGS08P22.snx igs08P1482.snx |TIXJ A 1| -9.4 7.6 -17.3|
-----------------------------------------|------------|-----------------------|
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