[IGSREPORT-17151] Wk 1518 IGS SINEX Combination
IGS SINEX
sinex at geod.nrcan.gc.ca
Wed Feb 25 14:29:53 PST 2009
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IGS Electronic Report 25 Feb 14:29:54 PST 2009 Message Number 17151
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Author: R. Ferland, M. Piraszewski
===============================================================
Combined AC solution for GPS week 1518 - 09/02/08 to 09/02/14
===============================================================
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)
igs09P1518.snx Combined weekly solution.
igs09P1518.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS09P06.snx Cumulative Combined solution.
igs09P1518.sum This file.
igs09P1518.itr Residuals between the AC and the IGS05 for the RF stations.
igs09P1518.res Residuals between the AC and the Combined Weekly solution.
IGS09P06.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 = igs09P1518.snx
IGS = IGS09P06.snx
MIT = mit15187.snx
mit = mit1518g.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 HRAO NETT POLV YAKT
grg AREQ FAIR NTUS WTZR YSSK
mit KUUJ
New stations in the cumulative solution IGS09P06.snx
HRAO 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 | 223 | 79 | 22.362 | 1.001 | 22.389 |
emr | 65 | 38 | 5.276 | 1.001 | 5.279 |
esa | 128 | 53 | 5.476 | 1.001 | 5.481 |
gfz | 194 | 75 | 16.861 | 1.001 | 16.877 |
jpl | 115 | 57 | 10.015 | 1.000 | 10.013 |
MIT | 242 | 87 | 2.137 | 1.001 | 2.139 |
ngs | 217 | 86 | 40.582 | 1.001 | 40.616 |
sio | 247 | 81 | 2.571 | 1.001 | 2.574 |
grg | 73 | 42 | 14.130 | 1.000 | 14.133 |
mit | 401 | 87 | 2.101 | 1.203 | 2.527 |
ncl | 214 | 88 | 2.822 | 1.001 | 2.825 |
igs | 344 | 91 | 1.539 | 1.000 | 1.539 |
---------------|-----|-----|---------------|---------------|---------------|
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 | -0.7 -0.1 0.2 | 3.2 2.9 8.0 |
emr 38 | -2.6 0.2 0.3 | 3.7 3.0 12.1 |
esa 53 | -0.7 -0.1 -0.2 | 3.9 3.1 10.0 |
gfz 75 | 0.2 -0.1 0.1 | 3.2 3.1 8.8 |
jpl 57 | -0.2 -0.1 -0.1 | 3.3 3.3 10.3 |
MIT 87 | -0.3 0.0 0.3 | 3.1 2.9 9.1 |
ngs 86 | -0.4 0.2 0.1 | 3.0 2.6 8.7 |
sio 81 | 0.5 -0.2 -0.3 | 3.5 2.9 8.2 |
grg 42 | 0.1 0.1 0.2 | 2.6 1.1 6.5 |
mit 87 | -0.3 0.0 0.2 | 3.2 2.8 8.4 |
ncl 88 | -0.3 0.0 0.1 | 3.1 3.0 9.0 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 212 | -0.4 -0.1 0.0 | 1.0 1.0 2.9 |
emr 65 | -2.6 0.6 -0.4 | 2.4 2.0 6.5 |
esa 123 | -0.7 -0.2 -0.2 | 1.9 1.5 3.9 |
gfz 190 | 0.6 0.0 -0.2 | 0.7 0.7 2.5 |
jpl 113 | -0.2 -0.4 -0.1 | 1.3 2.7 4.6 |
MIT 220 | 0.0 0.1 -0.3 | 0.6 0.6 1.9 |
ngs 204 | 0.0 0.3 -0.1 | 1.2 2.0 3.4 |
sio 240 | 0.8 0.2 -1.5 | 1.1 1.1 3.5 |
grg 73 | 0.0 0.2 1.0 | 2.3 3.6 7.9 |
mit 340 | 0.1 0.0 -0.1 | 0.5 0.4 1.2 |
ncl 210 | 0.0 0.1 -0.2 | 0.6 0.7 1.7 |
ITR 90 | 0.2 -0.1 -0.4 | 3.1 2.6 8.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 182 | -1.0 -0.3 0.8 | 1.9 1.7 5.3 |
emr 62 | -3.1 0.3 -0.7 | 3.0 2.3 8.4 |
esa 104 | -1.3 -0.2 -0.2 | 2.8 2.3 6.2 |
gfz 173 | 0.0 -0.3 0.3 | 2.1 2.1 5.4 |
jpl 111 | -0.8 -0.7 0.3 | 2.5 3.8 6.8 |
MIT 195 | -0.7 -0.2 -0.1 | 1.7 2.0 5.0 |
ngs 181 | -0.7 0.1 0.5 | 2.0 3.1 6.0 |
sio 206 | 0.2 -0.1 -0.5 | 2.3 2.2 5.1 |
grg 71 | -0.3 -0.1 0.6 | 2.4 3.5 8.2 |
mit 254 | -0.6 -0.2 0.4 | 2.2 2.7 5.2 |
ncl 201 | -0.7 -0.3 0.3 | 1.9 2.1 5.1 |
igs 253 | -0.7 -0.2 0.7 | 1.6 1.8 4.6 |
ITR 127 | -0.4 -0.1 0.0 | 2.5 2.4 9.0 |
---------------|---------------------------|---------------------------|
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 -0.006 0.6 0.1 1.3 -0.12 |
emr | 0.064 -0.015 0.017 12.7 -9.4 -9.7 0.02 |
esa | 0.016 -0.112 0.031 6.5 2.5 -3.2 -0.03 |
gfz | 0.016 -0.029 0.018 1.3 0.6 1.7 -0.42 |
jpl | -0.003 -0.035 0.017 1.7 0.3 2.7 0.15 |
MIT | -0.010 0.001 0.007 7.6 -4.7 -8.3 0.01 |
ngs | -0.049 -0.108 0.004 6.2 -3.1 -2.3 -0.05 |
sio | -0.020 0.008 0.001 1.7 -1.5 7.8 0.37 |
grg | -0.017 -0.006 0.016 2.6 -2.5 -8.0 0.13 |
mit | -0.022 0.000 -0.003 0.2 0.0 1.0 -0.11 |
ncl | 0.022 -0.007 0.026 0.5 0.6 1.2 -0.14 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.01 |
---------------|---------------------------------------------------------------|
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 | 0.062 0.065 0.073 1.7 1.7 1.7 0.26 |
esa | 0.052 0.057 0.060 1.4 1.4 1.4 0.22 |
gfz | 0.046 0.047 0.051 1.2 1.2 1.2 0.19 |
jpl | 0.051 0.052 0.058 1.3 1.3 1.3 0.21 |
MIT | 0.043 0.045 0.048 1.2 1.1 1.1 0.18 |
ngs | 0.043 0.046 0.048 1.2 1.2 1.1 0.18 |
sio | 0.044 0.047 0.048 1.2 1.2 1.2 0.18 |
grg | 0.061 0.063 0.075 1.7 1.7 1.6 0.26 |
mit | 0.042 0.044 0.048 1.1 1.1 1.1 0.18 |
ncl | 0.043 0.045 0.048 1.1 1.1 1.1 0.18 |
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 | 5.9 -2.7 -2.3 | 1.1 0.8 2.7 |
---------------|---------------------------|---------------------------|
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 | --- 14.3 -0.1 6.5 -5.2 21.8 |
esa | --- -19.7 2.8 15.6 -1.5 14.4 |
gfz | --- 0.7 0.8 9.5 -1.2 2.4 |
jpl | --- -2.3 -10.5 10.4 1.4 21.4 |
MIT | --- 6.2 -1.4 -15.3 2.2 -19.2 |
ngs | --- -5.4 1.9 1.7 -0.2 -9.5 |
sio | --- 10.2 0.6 --- -4.0 --- |
grg | --- -12.8 -1.4 8.6 -6.5 16.7 |
mit | --- 16.2 -1.0 18.7 -5.7 -2.3 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- -2.1 0.7 9.5 -3.9 15.1 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 8.9 1.0 4.5 1.7 12.1 |
esa | --- 14.4 3.7 20.0 1.5 11.0 |
gfz | --- 6.5 1.7 4.7 1.9 4.3 |
jpl | --- 28.3 4.8 10.1 6.0 13.8 |
MIT | --- 3.8 1.0 8.0 1.1 4.9 |
ngs | --- 15.1 3.9 11.4 7.8 9.9 |
sio | --- 4.7 1.4 --- 2.0 --- |
grg | --- 54.9 4.6 6.0 3.6 6.2 |
mit | --- 5.5 1.3 6.9 2.0 7.1 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 7.7 6.6 3.4 5.2 10.0 |
---------------|------------------------------------------------------------|
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 sio15187.snx |POLV A 1| 1.1 3.9 -26.3|
ITRF_IGS05.snx sio15187.snx |TROM A 1| 5.9 0.7 -26.2|
| | |
ITRF_IGS05.snx mit1518g.snx |POLV A 1| 1.5 2.8 -23.9|
| | |
IGS09P05.snx cod15187.snx |EIL1 A 1| -1.4 -11.2 -24.9|
IGS09P05.snx cod15187.snx |MOBJ A 1| -4.8 1.4 52.3|
IGS09P05.snx cod15187.snx |YAKT A 5| -8.4 11.4 1.6|
| | |
IGS09P05.snx esa15187.snx |YAKT A 5| -6.5 13.4 9.6|
| | |
IGS09P05.snx gfz15187.snx |EIL1 A 1| 0.6 -12.8 -30.1|
IGS09P05.snx gfz15187.snx |YAKT A 5| -9.5 13.6 7.1|
| | |
IGS09P05.snx jpl15187.snx |XIAN A 1| -17.2 39.8 -42.4|
| | |
IGS09P05.snx jpl15187.snx |YAKT A 5| -7.6 19.5 10.2|
| | |
IGS09P05.snx ngs15187.snx |EIL1 A 1| -1.8 -14.6 -29.2|
IGS09P05.snx ngs15187.snx |WLSN A 3| -1.9 3.4 -59.0|
| | |
IGS09P05.snx sio15187.snx |EIL1 A 1| 2.1 -12.4 -27.4|
| | |
IGS09P05.snx mit1518g.snx |NETT A 1| 17.3 -73.8 -18.9|
| | |
IGS09P05.snx ncl1518g.snx |EIL1 A 1| 0.0 -11.9 -28.3|
IGS09P05.snx ncl1518g.snx |YAKT A 5| -10.7 13.1 10.3|
| | |
IGS09P05.snx igs09P1518.snx |BUE1 A 1| -7.1 -2.1 0.7|
IGS09P05.snx igs09P1518.snx |NVSK A 2| 9.0 5.3 2.9|
IGS09P05.snx igs09P1518.snx |QIKI A 1| 8.5 -7.5 -3.4|
-----------------------------------------|------------|-----------------------|
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