[IGSREPORT-18230] Wk 1566 IGS SINEX Combination
IGS SINEX
sinex at geod.nrcan.gc.ca
Wed Jan 27 18:13:22 PST 2010
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IGS Electronic Report 27 Jan 18:13:53 PST 2010 Message Number 18230
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Author: R. Ferland, M. Piraszewski
===============================================================
Combined AC solution for GPS week 1566 - 10/01/10 to 10/01/16
===============================================================
This is the last official weekly SINEX combination from NRCan.
It has already been more than 10 years since the Reference
Frame pilot project leading to these official IGS weekly SINEX
products. I would like to express my sincere gratitude to the
NRCan management and the entire IGS community for this unique
opportunity and all these years of support. I would also like
to thank Martin Bourassa and Mike Piraszewski for their
part-time contribution.
Starting next week the official weekly SINEX products will be
provided by Bruno Garayt and Paul Rebischung from IGN.
I wish then the very best.
Best Regards,
Remi
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)
igs10P1566.snx Combined weekly solution.
igs10P1566.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS10P02.snx Cumulative Combined solution.
igs10P1566.sum This file.
igs10P1566.itr Residuals between the AC and the IGS05 for the RF stations.
igs10P1566.res Residuals between the AC and the Combined Weekly solution.
IGS10P02.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 = igs10P1566.snx
IGS = IGS10P02.snx
MIT = mit15667.snx
mit = mit1566g.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 ASPA
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 | 229 | 64 | 31.673 | 1.000 | 31.671 |
emr | 83 | 42 | 7.052 | 1.000 | 7.054 |
esa | 140 | 42 | 5.911 | 0.999 | 5.906 |
gfz | 185 | 62 | 19.948 | 1.000 | 19.943 |
jpl | 117 | 42 | 10.939 | 1.000 | 10.934 |
MIT | 245 | 68 | 3.401 | 0.999 | 3.399 |
ngs | 206 | 65 | 48.758 | 1.000 | 48.755 |
sio | 250 | 66 | 3.272 | 1.000 | 3.271 |
grg | 101 | 40 | 11.827 | 0.999 | 11.820 |
mit | 412 | 67 | 2.613 | 1.036 | 2.708 |
ncl | 214 | 68 | 1.587 | 1.001 | 1.589 |
igs | 356 | 69 | 1.481 | 1.000 | 1.481 |
---------------|-----|-----|---------------|---------------|---------------|
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 64 | -0.6 0.2 -0.1 | 3.4 3.0 8.1 |
emr 42 | 0.7 0.2 0.1 | 3.8 3.4 8.3 |
esa 42 | -0.3 0.1 0.7 | 3.6 3.2 9.7 |
gfz 62 | -0.3 0.1 -0.1 | 3.3 3.2 8.1 |
jpl 42 | -0.3 -0.1 -0.3 | 3.6 3.9 9.7 |
MIT 68 | 0.2 0.3 0.1 | 3.4 3.5 8.5 |
ngs 65 | 0.0 0.0 0.1 | 3.1 3.6 8.5 |
sio 66 | 0.1 0.2 0.0 | 4.0 3.4 8.5 |
grg 40 | -1.0 0.2 0.2 | 4.4 3.3 7.3 |
mit 66 | -0.3 0.1 -0.5 | 3.3 3.2 7.8 |
ncl 68 | 0.0 0.3 -0.3 | 3.4 3.3 8.0 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 211 | -0.6 0.0 1.0 | 1.0 0.9 3.0 |
emr 76 | 0.7 -0.1 1.1 | 1.6 0.9 3.6 |
esa 130 | -0.1 0.3 2.0 | 2.1 1.3 4.2 |
gfz 173 | 0.2 0.3 0.3 | 0.7 0.7 2.2 |
jpl 108 | -0.1 -0.5 0.7 | 1.4 2.1 5.0 |
MIT 216 | 0.3 0.3 0.3 | 0.6 0.8 1.7 |
ngs 183 | 0.2 0.4 0.3 | 1.3 1.8 3.0 |
sio 239 | 0.5 0.3 0.4 | 1.3 0.8 2.4 |
grg 96 | -0.8 -0.3 1.2 | 3.8 2.7 6.3 |
mit 350 | -0.1 -0.1 -0.5 | 0.3 0.3 1.3 |
ncl 200 | 0.1 0.2 0.2 | 0.5 0.6 1.6 |
ITR 68 | 0.3 -0.3 -0.2 | 3.2 3.1 8.0 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 192 | -1.8 0.1 0.6 | 2.6 2.2 7.4 |
emr 76 | -1.1 0.0 -0.5 | 3.2 2.5 7.0 |
esa 114 | -1.7 0.7 1.4 | 2.8 2.5 8.9 |
gfz 169 | -1.3 0.2 -0.6 | 2.6 2.5 6.3 |
jpl 109 | -1.7 -0.4 0.2 | 2.9 3.9 7.1 |
MIT 198 | -1.2 0.1 -0.7 | 2.4 2.3 6.9 |
ngs 176 | -1.2 0.2 -0.8 | 2.7 3.0 7.5 |
sio 214 | -0.5 -0.1 -0.3 | 3.0 2.4 7.0 |
grg 98 | -1.8 -0.3 0.6 | 3.9 3.6 8.7 |
mit 275 | -1.5 -0.3 -1.2 | 2.5 2.2 6.8 |
ncl 198 | -1.3 0.1 -0.9 | 2.6 2.5 6.5 |
igs 269 | -1.1 -0.1 -0.9 | 2.2 2.1 6.0 |
ITR 112 | -0.8 -0.1 -0.1 | 2.7 2.9 10.3 |
---------------|---------------------------|---------------------------|
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 | -0.021 0.004 -0.023 0.2 1.1 1.2 -0.12 |
emr | 0.015 -0.039 0.025 11.3 -1.0 2.2 0.20 |
esa | 0.063 -0.072 0.031 6.8 2.8 -1.9 0.14 |
gfz | 0.008 -0.009 0.000 0.2 1.1 1.4 0.07 |
jpl | -0.014 -0.026 -0.038 4.8 4.2 3.9 0.24 |
MIT | -0.012 0.006 -0.040 3.6 -0.4 1.4 0.23 |
ngs | -0.033 -0.146 0.000 11.7 -2.1 -1.7 0.05 |
sio | 0.023 -0.061 0.021 3.4 2.4 -6.7 0.39 |
grg | 0.033 0.010 0.025 6.1 11.4 -2.5 0.91 |
mit | 0.019 0.014 0.015 0.0 1.6 1.2 0.27 |
ncl | -0.008 0.049 0.042 -0.1 0.3 2.1 0.18 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.15 |
---------------|---------------------------------------------------------------|
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 0.057 1.3 1.3 1.3 0.20 |
emr | 0.059 0.062 0.072 1.6 1.6 1.6 0.25 |
esa | 0.058 0.063 0.069 1.6 1.6 1.6 0.25 |
gfz | 0.051 0.051 0.057 1.3 1.3 1.3 0.21 |
jpl | 0.058 0.061 0.068 1.6 1.6 1.6 0.25 |
MIT | 0.049 0.050 0.054 1.3 1.3 1.3 0.20 |
ngs | 0.050 0.051 0.056 1.3 1.3 1.3 0.20 |
sio | 0.049 0.050 0.055 1.3 1.3 1.3 0.20 |
grg | 0.061 0.064 0.073 1.6 1.6 1.6 0.26 |
mit | 0.049 0.050 0.056 1.3 1.3 1.3 0.20 |
ncl | 0.049 0.050 0.054 1.3 1.3 1.3 0.20 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.15 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 8.7 0.1 -2.3 | 1.5 1.0 3.3 |
---------------|---------------------------|---------------------------|
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 | --- 7.1 3.7 14.7 0.2 22.7 |
esa | --- 15.4 2.5 17.9 0.0 15.1 |
gfz | --- 1.0 0.3 5.9 -1.2 1.4 |
jpl | --- 4.5 1.8 4.2 -4.7 14.3 |
MIT | --- -12.9 -2.5 -26.2 2.9 -26.4 |
ngs | --- 8.9 3.1 10.1 5.5 -9.9 |
sio | --- 1.4 0.9 --- 0.5 --- |
grg | --- 19.9 -6.6 22.3 1.1 8.9 |
mit | --- -4.7 -1.8 -0.2 -2.5 -30.3 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 9.1 -1.4 4.8 2.7 12.3 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 7.0 2.4 8.3 1.6 16.5 |
esa | --- 5.6 3.2 12.0 1.7 6.8 |
gfz | --- 6.0 1.2 3.9 1.6 4.5 |
jpl | --- 11.6 1.5 12.4 1.4 12.4 |
MIT | --- 3.2 1.3 3.4 1.0 7.7 |
ngs | --- 3.7 6.0 12.1 7.9 12.9 |
sio | --- 3.5 0.6 --- 1.3 --- |
grg | --- 30.3 4.4 19.0 3.1 9.3 |
mit | --- 3.0 0.6 4.6 1.3 6.7 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 15.7 6.1 5.9 3.2 5.5 |
---------------|------------------------------------------------------------|
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)|
-----------------------------------------|------------|-----------------------|
| | |
IGS10P01.snx MIT15667.snx |CRU1 A 1| -24.8 41.4 -6.3|
IGS10P01.snx MIT15667.snx |NETT A 1| 10.1 -51.4 -2.5|
| | |
IGS10P01.snx sio15667.snx |SCH2 A 2| -2.9 0.9 35.9|
| | |
IGS10P01.snx mit1566g.snx |CRU1 A 1| -24.9 40.5 -6.3|
IGS10P01.snx mit1566g.snx |NETT A 1| 9.7 -52.3 -4.1|
| | |
IGS10P01.snx mit1566g.snx |DGAR A 1| -12.3 -13.7 -4.0|
IGS10P01.snx mit1566g.snx |HNPT A 3| 11.2 -0.5 -1.3|
IGS10P01.snx mit1566g.snx |WUHN A 4| -10.3 -1.4 -2.7|
| | |
IGS10P01.snx igs10P1566.snx |ARTU A 3| 1.5 1.0 20.1|
IGS10P01.snx igs10P1566.snx |BUE1 A 1| -8.9 3.6 4.7|
IGS10P01.snx igs10P1566.snx |EIL1 A 1| -5.6 -9.4 -25.6|
IGS10P01.snx igs10P1566.snx |GUAT A 1| -6.2 -2.5 -2.3|
IGS10P01.snx igs10P1566.snx |HNPT A 3| 11.0 -0.6 -1.6|
IGS10P01.snx igs10P1566.snx |MANA A 2| -6.5 -0.8 -9.2|
IGS10P01.snx igs10P1566.snx |MDO1 A 3| 3.3 -6.4 -1.9|
IGS10P01.snx igs10P1566.snx |SCH2 A 2| -5.4 1.7 24.9|
IGS10P01.snx igs10P1566.snx |TWTF A 2| -8.0 -0.6 6.7|
IGS10P01.snx igs10P1566.snx |UNSA A 1| -6.5 9.4 -1.2|
IGS10P01.snx igs10P1566.snx |WHIT A 1| -2.9 -5.6 -3.3|
IGS10P01.snx igs10P1566.snx |YAKT A 6| -5.1 6.7 -2.7|
-----------------------------------------|------------|-----------------------|
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