[IGSREPORT-17129] Wk 1517 IGS SINEX Combination
IGS SINEX
sinex at geod.nrcan.gc.ca
Wed Feb 18 21:27:30 PST 2009
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IGS Electronic Report 18 Feb 21:27:32 PST 2009 Message Number 17129
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Author: R. Ferland, M. Piraszewski
===============================================================
Combined AC solution for GPS week 1517 - 09/02/01 to 09/02/07
===============================================================
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)
igs09P1517.snx Combined weekly solution.
igs09P1517.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS09P05.snx Cumulative Combined solution.
igs09P1517.sum This file.
igs09P1517.itr Residuals between the AC and the IGS05 for the RF stations.
igs09P1517.res Residuals between the AC and the Combined Weekly solution.
IGS09P05.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 = igs09P1517.snx
IGS = IGS09P05.snx
MIT = mit15177.snx
mit = mit1517g.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
gfz SATA X Y Z
MIT SATA X Y Z
sio SATA X Y Z
mit SATA X Y Z
After unconstraining:
MIT EIL1 NETT OHI2 PIE1 YAKT
mit ETAD KUUJ OHI2
grg FAIR NTUS WTZR
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 | 221 | 79 | 24.794 | 0.997 | 24.723 |
emr | 71 | 41 | 5.375 | 0.999 | 5.368 |
esa | 125 | 52 | 6.059 | 0.998 | 6.049 |
gfz | 189 | 77 | 16.141 | 0.997 | 16.096 |
jpl | 124 | 57 | 9.588 | 0.999 | 9.576 |
MIT | 245 | 88 | 2.159 | 0.996 | 2.151 |
ngs | 215 | 88 | 41.719 | 0.998 | 41.624 |
sio | 249 | 85 | 2.866 | 0.998 | 2.860 |
grg | 77 | 45 | 17.185 | 1.000 | 17.184 |
mit | 389 | 87 | 2.349 | 0.913 | 2.144 |
ncl | 220 | 90 | 2.852 | 0.997 | 2.845 |
igs | 338 | 87 | 1.423 | 1.016 | 1.446 |
---------------|-----|-----|---------------|---------------|---------------|
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 79 | -1.2 -0.1 0.1 | 3.2 2.9 9.1 |
emr 41 | -3.2 -0.1 0.4 | 3.8 3.7 12.1 |
esa 52 | -0.9 -0.1 0.0 | 4.3 3.2 9.7 |
gfz 77 | -0.6 0.0 0.1 | 3.5 2.8 9.5 |
jpl 57 | -0.9 -0.2 -0.2 | 3.6 3.4 12.0 |
MIT 88 | -0.3 0.1 0.3 | 3.1 2.9 9.4 |
ngs 88 | -0.7 0.2 0.3 | 3.3 3.1 8.9 |
sio 85 | 0.5 -0.2 -0.1 | 3.3 3.0 9.3 |
grg 45 | -0.3 0.2 0.6 | 2.7 1.3 6.9 |
mit 86 | -0.2 0.0 0.2 | 3.3 2.8 8.9 |
ncl 90 | -0.9 0.0 0.2 | 3.3 3.0 9.6 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 206 | -0.2 -0.1 0.0 | 0.8 0.8 2.9 |
emr 68 | -2.7 0.6 -1.1 | 2.6 2.9 6.5 |
esa 116 | -0.3 -0.2 -0.5 | 2.2 1.5 4.2 |
gfz 184 | 0.4 0.0 0.1 | 0.7 0.7 2.3 |
jpl 121 | -0.4 -0.5 0.4 | 1.5 2.5 4.7 |
MIT 219 | 0.5 0.0 0.2 | 0.7 0.6 1.9 |
ngs 198 | 0.2 0.0 -0.2 | 1.0 1.8 3.1 |
sio 238 | 1.5 -0.3 -0.2 | 0.8 1.1 3.1 |
grg 75 | 0.1 0.6 1.0 | 2.7 4.5 8.0 |
mit 333 | 0.8 -0.1 0.0 | 0.3 0.3 1.2 |
ncl 212 | 0.0 -0.1 0.2 | 0.5 0.7 1.5 |
ITR 86 | 0.7 -0.2 -0.3 | 3.2 2.3 8.8 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 181 | -1.4 -0.1 0.3 | 1.9 2.1 5.2 |
emr 68 | -3.8 0.2 -1.0 | 3.3 3.0 8.1 |
esa 102 | -1.5 -0.2 -0.6 | 3.2 2.6 5.9 |
gfz 174 | -0.9 -0.1 0.4 | 2.0 2.1 5.1 |
jpl 118 | -1.5 -0.6 0.5 | 2.6 3.6 7.6 |
MIT 198 | -0.7 -0.1 0.2 | 1.8 2.0 4.9 |
ngs 181 | -1.1 0.0 -0.1 | 2.1 2.7 5.6 |
sio 210 | 0.3 -0.3 0.0 | 2.1 2.5 5.5 |
grg 75 | -0.7 0.4 0.6 | 2.6 4.4 8.2 |
mit 251 | -0.5 -0.2 0.2 | 1.7 1.9 4.6 |
ncl 205 | -1.2 -0.2 0.2 | 2.0 2.3 5.0 |
igs 251 | -1.2 0.0 0.3 | 1.7 1.8 4.3 |
ITR 127 | -0.4 -0.1 0.0 | 2.5 2.4 8.9 |
---------------|---------------------------|---------------------------|
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 | -0.016 -0.004 -0.007 0.4 0.1 1.4 -0.10 |
emr | 0.129 -0.006 0.046 13.2 -9.7 -15.2 0.23 |
esa | 0.003 -0.104 0.023 8.0 2.2 -3.1 0.14 |
gfz | 0.013 -0.034 0.006 1.2 0.3 1.7 -0.42 |
jpl | -0.019 -0.039 0.011 5.8 3.3 -1.3 0.01 |
MIT | -0.017 -0.002 -0.006 7.0 -3.7 -14.8 -0.12 |
ngs | -0.039 -0.107 0.010 6.8 -2.8 -0.9 0.03 |
sio | -0.083 -0.064 0.010 1.5 -5.1 -12.4 0.24 |
grg | -0.021 -0.009 0.006 2.8 -1.4 -10.4 0.13 |
mit | -0.025 -0.001 -0.003 -0.2 -0.4 0.7 -0.13 |
ncl | 0.013 -0.010 0.015 0.5 0.2 1.3 -0.21 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.00 |
---------------|---------------------------------------------------------------|
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 0.046 0.050 1.2 1.2 1.2 0.18 |
emr | 0.059 0.064 0.071 1.7 1.6 1.6 0.25 |
esa | 0.052 0.057 0.062 1.4 1.4 1.4 0.22 |
gfz | 0.045 0.046 0.050 1.2 1.2 1.2 0.19 |
jpl | 0.050 0.053 0.058 1.4 1.4 1.3 0.21 |
MIT | 0.043 0.044 0.048 1.1 1.1 1.1 0.18 |
ngs | 0.043 0.045 0.048 1.1 1.1 1.1 0.18 |
sio | 0.043 0.045 0.048 1.2 1.2 1.1 0.18 |
grg | 0.059 0.060 0.073 1.6 1.6 1.6 0.25 |
mit | 0.043 0.045 0.048 1.1 1.1 1.1 0.18 |
ncl | 0.042 0.044 0.047 1.1 1.1 1.1 0.17 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.22 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 4.9 -2.6 -6.4 | 1.1 0.8 2.6 |
---------------|---------------------------|---------------------------|
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 | --- 0.1 -1.3 6.9 -7.7 30.5 |
esa | --- 11.1 0.0 10.8 -2.8 -1.2 |
gfz | --- -8.6 4.0 7.0 -3.4 3.6 |
jpl | --- -11.2 -14.5 14.0 5.0 26.0 |
MIT | --- 1.9 -0.9 -15.8 3.6 -16.9 |
ngs | --- -11.5 -3.5 15.1 -0.1 -14.6 |
sio | --- 8.2 3.6 --- -2.0 --- |
grg | --- -4.1 0.2 11.7 -5.9 14.2 |
mit | --- 7.0 1.6 17.2 -3.3 4.3 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- -13.2 1.0 12.3 -4.2 16.5 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 6.2 2.1 21.8 6.2 9.5 |
esa | --- 6.1 4.2 20.6 3.4 14.3 |
gfz | --- 2.9 2.6 8.7 1.2 5.2 |
jpl | --- 9.4 6.1 17.4 6.7 12.0 |
MIT | --- 1.7 0.7 5.3 0.8 3.9 |
ngs | --- 15.9 5.3 8.7 4.7 9.8 |
sio | --- 3.5 1.6 --- 1.9 --- |
grg | --- 43.1 4.2 6.9 2.1 10.4 |
mit | --- 3.3 1.5 4.4 1.9 2.4 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 24.2 7.9 6.4 3.6 14.3 |
---------------|------------------------------------------------------------|
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 emr15177.snx |GUAM A 4| -14.6 4.5 12.7|
| | |
ITRF_IGS05.snx esa15177.snx |DARW A 1| -13.8 2.6 16.9|
| | |
IGS09P04.snx cod15177.snx |MOBJ A 1| -4.0 0.0 66.8|
| | |
IGS09P04.snx cod15177.snx |EIL1 A 1| -3.3 -11.0 -24.8|
IGS09P04.snx cod15177.snx |MEDI A 2| -1.8 11.1 -3.2|
| | |
IGS09P04.snx emr15177.snx |YAKT A 5| -12.2 15.5 9.3|
| | |
IGS09P04.snx esa15177.snx |YAKT A 5| -8.2 14.6 8.2|
| | |
IGS09P04.snx gfz15177.snx |EIL1 A 1| -1.2 -12.7 -30.1|
IGS09P04.snx gfz15177.snx |QIKI A 1| 7.7 -10.7 -5.1|
IGS09P04.snx gfz15177.snx |YAKT A 5| -10.8 13.6 9.4|
| | |
IGS09P04.snx jpl15177.snx |XIAN A 1| -17.5 39.8 -38.9|
| | |
IGS09P04.snx jpl15177.snx |GUAT A 1| -5.8 -17.0 13.8|
IGS09P04.snx jpl15177.snx |YAKT A 5| -6.9 20.1 10.0|
| | |
IGS09P04.snx ngs15177.snx |EIL1 A 1| -1.7 -13.5 -30.2|
IGS09P04.snx ngs15177.snx |MEDI A 2| -0.8 12.8 -5.1|
| | |
IGS09P04.snx sio15177.snx |EIL1 A 1| 1.3 -12.1 -28.6|
| | |
IGS09P04.snx mit1517g.snx |NETT A 1| 16.5 -72.7 -7.3|
| | |
IGS09P04.snx mit1517g.snx |EIL1 A 1| -0.9 -11.9 -29.6|
IGS09P04.snx mit1517g.snx |MEDI A 2| -0.3 10.0 -1.8|
IGS09P04.snx mit1517g.snx |MOBJ A 1| -3.4 -0.2 69.2|
IGS09P04.snx mit1517g.snx |QIKI A 1| 8.7 -10.3 -1.7|
IGS09P04.snx mit1517g.snx |WUHN A 4| -9.8 -2.1 -4.4|
IGS09P04.snx mit1517g.snx |XIAN A 1| -16.6 38.5 -35.5|
IGS09P04.snx mit1517g.snx |YAKT A 5| -9.8 11.6 10.5|
| | |
IGS09P04.snx ncl1517g.snx |EIL1 A 1| -2.3 -12.8 -27.8|
IGS09P04.snx ncl1517g.snx |YAKT A 5| -9.9 11.8 10.5|
| | |
IGS09P04.snx igs09P1517.snx |ALGO A 7| 2.2 -7.0 6.1|
IGS09P04.snx igs09P1517.snx |BUE1 A 1| -8.3 -0.6 1.5|
IGS09P04.snx igs09P1517.snx |MDVJ A 1| -5.8 6.2 -15.2|
IGS09P04.snx igs09P1517.snx |MEDI A 2| -0.8 8.5 -1.4|
IGS09P04.snx igs09P1517.snx |QIKI A 1| 8.9 -10.1 -1.9|
IGS09P04.snx igs09P1517.snx |UNSA A 1| -6.1 4.5 -4.0|
IGS09P04.snx igs09P1517.snx |YAKT A 5| -9.1 8.7 10.4|
IGS09P04.snx igs09P1517.snx |YELL A 5| -1.5 1.4 -17.1|
-----------------------------------------|------------|-----------------------|
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