[IGSREPORT-17917] Wk 1552 IGS SINEX Combination
IGS SINEX
sinex at geod.nrcan.gc.ca
Wed Oct 21 18:11:56 PDT 2009
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IGS Electronic Report 21 Oct 18:12:23 PDT 2009 Message Number 17917
******************************************************************************
Author: R. Ferland, M. Piraszewski
===============================================================
Combined AC solution for GPS week 1552 - 09/10/04 to 09/10/10
===============================================================
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)
igs09P1552.snx Combined weekly solution.
igs09P1552.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS09P40.snx Cumulative Combined solution.
igs09P1552.sum This file.
igs09P1552.itr Residuals between the AC and the IGS05 for the RF stations.
igs09P1552.res Residuals between the AC and the Combined Weekly solution.
IGS09P40.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 = igs09P1552.snx
IGS = IGS09P40.snx
MIT = mit15527.snx
mit = mit1552g.snx
BuA = IERS Bulletin A
grg mit ncl 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
esa 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:
grg AREQ ASPA FAIR HRAO NOVM YKRO
New stations in the cumulative solution IGS09P40.snx
ASPA A 3
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 | 214 | 65 | 21.825 | 1.002 | 21.863 |
emr | 74 | 32 | 5.083 | 1.001 | 5.088 |
esa | 124 | 43 | 4.562 | 1.001 | 4.568 |
gfz | 179 | 63 | 14.406 | 1.002 | 14.431 |
jpl | 113 | 45 | 8.879 | 1.001 | 8.886 |
MIT | 246 | 69 | 2.213 | 1.002 | 2.218 |
ngs | 216 | 69 | 30.970 | 1.002 | 31.023 |
sio | 253 | 68 | 2.020 | 1.002 | 2.024 |
grg | 106 | 43 | 15.638 | 1.000 | 15.643 |
mit | 409 | 68 | 2.272 | 0.968 | 2.200 |
ncl | 207 | 70 | 2.697 | 1.002 | 2.702 |
igs | 344 | 74 | 1.543 | 1.026 | 1.582 |
---------------|-----|-----|---------------|---------------|---------------|
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 65 | 0.3 0.1 0.3 | 2.6 3.2 8.0 |
emr 32 | -0.7 0.0 0.1 | 3.9 4.2 9.4 |
esa 43 | -0.5 -0.1 0.4 | 4.0 3.4 8.8 |
gfz 63 | 0.1 0.1 0.1 | 2.6 3.2 8.0 |
jpl 45 | 0.1 0.0 0.3 | 2.9 3.3 8.2 |
MIT 69 | 0.3 0.3 0.3 | 2.4 3.3 7.9 |
ngs 69 | 0.3 0.2 0.0 | 2.5 3.2 7.9 |
sio 68 | 0.4 0.1 0.1 | 2.9 3.2 8.0 |
grg 43 | 0.7 0.1 0.1 | 2.7 1.0 6.0 |
mit 67 | -0.1 0.2 -0.1 | 2.4 3.1 7.5 |
ncl 70 | 0.4 0.2 0.0 | 2.5 3.4 7.6 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 198 | 0.1 0.0 1.0 | 0.8 0.5 2.3 |
emr 70 | -0.8 -0.9 0.1 | 2.5 2.5 5.7 |
esa 112 | -0.7 -0.1 0.2 | 2.9 1.4 4.9 |
gfz 172 | -0.2 0.1 0.1 | 0.6 0.5 2.2 |
jpl 107 | -0.3 -0.5 -1.4 | 1.5 2.5 4.5 |
MIT 212 | 0.1 -0.2 0.2 | 0.6 0.7 1.7 |
ngs 198 | 0.1 0.1 0.2 | 0.8 1.0 2.0 |
sio 241 | 0.8 -0.1 0.0 | 1.4 0.7 2.8 |
grg 103 | 0.3 -0.2 0.2 | 2.7 4.1 8.1 |
mit 337 | -0.4 -0.4 -0.2 | 0.3 0.3 0.9 |
ncl 198 | 0.1 0.0 0.2 | 0.7 0.8 1.0 |
ITR 73 | 0.1 -0.4 0.4 | 2.3 3.0 7.0 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 168 | -0.8 0.0 0.1 | 1.8 1.5 4.6 |
emr 70 | -2.2 -0.9 -0.8 | 3.0 3.2 8.0 |
esa 96 | -2.0 -0.1 -0.5 | 3.0 2.1 5.9 |
gfz 162 | -1.2 0.1 -0.5 | 1.7 1.5 4.5 |
jpl 103 | -1.5 -0.6 -1.5 | 2.5 2.9 5.9 |
MIT 184 | -0.9 0.0 -0.2 | 1.5 1.4 4.4 |
ngs 168 | -0.9 0.1 -0.7 | 1.8 1.7 4.9 |
sio 202 | -0.2 0.0 -0.8 | 2.1 1.6 5.5 |
grg 101 | -0.6 -0.3 -0.4 | 2.6 3.7 8.3 |
mit 240 | -1.2 -0.3 -0.9 | 1.6 1.5 4.3 |
ncl 189 | -0.9 0.0 -0.3 | 1.6 1.6 4.2 |
igs 239 | -0.8 0.0 -0.7 | 1.4 1.4 4.2 |
ITR 113 | -0.8 -0.1 -0.1 | 2.5 2.7 9.9 |
---------------|---------------------------|---------------------------|
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 | -0.007 0.002 -0.013 0.1 1.0 1.3 -0.26 |
emr | 0.078 -0.040 0.111 -1.1 -5.5 -2.6 -0.02 |
esa | 0.106 -0.018 0.073 3.7 7.6 7.5 -0.18 |
gfz | 0.026 -0.003 0.004 -0.2 1.1 1.0 -0.16 |
jpl | 0.004 -0.037 -0.027 -0.9 6.5 -0.6 0.39 |
MIT | 0.012 0.015 -0.011 1.5 3.2 10.3 -0.26 |
ngs | 0.001 0.009 -0.006 1.0 0.1 2.4 -0.06 |
sio | 0.074 -0.082 0.000 5.9 4.1 -1.6 0.18 |
grg | 0.014 0.003 0.026 5.6 5.6 2.7 0.08 |
mit | 0.000 0.027 -0.004 -1.0 1.4 1.2 -0.11 |
ncl | 0.002 0.038 0.045 -0.2 0.2 1.5 -0.17 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.05 |
---------------|---------------------------------------------------------------|
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 | 0.050 0.051 0.055 1.3 1.3 1.3 0.20 |
emr | 0.068 0.075 0.074 1.8 1.8 1.8 0.28 |
esa | 0.059 0.064 0.065 1.6 1.6 1.6 0.24 |
gfz | 0.051 0.052 0.055 1.3 1.3 1.3 0.21 |
jpl | 0.058 0.060 0.065 1.5 1.5 1.5 0.24 |
MIT | 0.048 0.050 0.053 1.3 1.3 1.3 0.20 |
ngs | 0.049 0.051 0.053 1.3 1.3 1.3 0.20 |
sio | 0.048 0.051 0.053 1.3 1.3 1.3 0.20 |
grg | 0.059 0.061 0.069 1.6 1.6 1.6 0.25 |
mit | 0.049 0.050 0.054 1.3 1.3 1.3 0.20 |
ncl | 0.048 0.050 0.052 1.3 1.3 1.3 0.20 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.23 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 2.0 2.2 5.8 | 1.1 0.8 2.4 |
---------------|---------------------------|---------------------------|
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 | --- -8.7 2.5 0.8 -0.1 -12.1 |
esa | --- -17.6 0.5 7.3 -3.5 19.0 |
gfz | --- 12.8 -2.3 5.5 -1.4 -9.4 |
jpl | --- 11.3 -0.6 17.2 -0.6 1.9 |
MIT | --- 3.9 3.1 -23.3 0.9 2.6 |
ngs | --- 4.4 -2.2 22.1 -0.6 -1.5 |
sio | --- -7.0 4.3 --- 2.5 --- |
grg | --- 5.0 -3.8 16.5 -1.0 -2.9 |
mit | --- 1.4 1.8 1.2 0.3 -13.8 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 7.5 1.5 16.3 2.9 -5.2 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 7.4 2.6 13.2 2.7 11.4 |
esa | --- 9.7 3.1 12.2 1.7 10.1 |
gfz | --- 4.6 1.8 2.7 1.8 4.6 |
jpl | --- 8.6 1.6 9.4 1.4 6.5 |
MIT | --- 1.7 1.6 5.5 0.9 3.5 |
ngs | --- 5.4 2.0 5.7 2.1 13.1 |
sio | --- 3.0 1.3 --- 1.2 --- |
grg | --- 26.1 5.0 8.5 2.4 7.0 |
mit | --- 2.3 1.3 10.3 1.3 13.5 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 16.3 5.6 8.4 3.5 8.3 |
---------------|------------------------------------------------------------|
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 MIT15527.snx |SFER A 5| 1.9 -9.0 0.7|
| | |
ITRF_IGS05.snx ngs15527.snx |SFER A 5| 2.3 -8.7 2.6|
| | |
ITRF_IGS05.snx sio15527.snx |SFER A 5| 3.0 -9.2 -2.0|
| | |
ITRF_IGS05.snx mit1552g.snx |SFER A 5| 2.1 -9.0 2.0|
| | |
IGS09P39.snx esa15527.snx |NRMD A 1| 8.2 1.7 -43.2|
| | |
IGS09P39.snx sio15527.snx |SJDV A 1| 4.2 31.7 20.6|
| | |
IGS09P39.snx sio15527.snx |ALME A 1| -13.4 1.3 1.8|
| | |
IGS09P39.snx mit1552g.snx |DGAR A 1| -11.3 -16.0 4.2|
IGS09P39.snx mit1552g.snx |SJDV A 1| 2.6 32.1 22.1|
| | |
IGS09P39.snx mit1552g.snx |MAC1 A 4| -11.8 -1.5 -5.9|
IGS09P39.snx mit1552g.snx |WUHN A 4| -10.4 -3.3 -2.7|
| | |
IGS09P39.snx igs09P1552.snx |CCJM A 2| -3.0 -7.3 -0.8|
IGS09P39.snx igs09P1552.snx |KOUR A 2| -4.6 -0.8 -12.9|
IGS09P39.snx igs09P1552.snx |SCH2 A 2| 0.1 -5.1 -6.6|
IGS09P39.snx igs09P1552.snx |SSIA A 4| -6.8 0.8 -0.4|
IGS09P39.snx igs09P1552.snx |TWTF A 2| -6.6 0.7 4.5|
IGS09P39.snx igs09P1552.snx |UNSA A 1| -2.1 6.2 -2.5|
-----------------------------------------|------------|-----------------------|
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