[IGSREPORT-16232] Wk 1477 IGS SINEX Combination
IGS SINEX
sinex at geod.nrcan.gc.ca
Thu May 15 03:30:05 PDT 2008
******************************************************************************
IGS Electronic Report 15 May 03:30:34 PDT 2008 Message Number 16232
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Author: R. Ferland, M. Piraszewski
===============================================================
Combined AC solution for GPS week 1477 - 08/04/27 to 08/05/03
===============================================================
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)
igs08P1477.snx Combined weekly solution.
igs08P1477.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS08P18.snx Cumulative Combined solution.
igs08P1477.sum This file.
igs08P1477.itr Residuals between the AC and the IGS05 for the RF stations.
igs08P1477.res Residuals between the AC and the Combined Weekly solution.
IGS08P18.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 = igs08P1477.snx
IGS = IGS08P18.snx
MIT = mit14777.snx
mit = mit1477g.snx
BuA = IERS Bulletin A
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:
cod HOFN THU3
emr REYK
esa HOFN REYK THU3
gfz HOFN KOUC REYK THU3
jpl THU3
MIT HOFN KOUC REYK THU3
ngs HOFN KOUC REYK THU3
sio AUCK HOFN REYK THU3
ncl HRAO YSSK
New stations in the cumulative solution IGS08P18.snx
DAV1 A 2
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 | 189 | 80 | 18.479 | 1.033 | 19.081 |
emr | 68 | 40 | 4.002 | 1.008 | 4.032 |
esa | 113 | 68 | 3.970 | 1.003 | 3.980 |
gfz | 177 | 86 | 11.462 | 1.002 | 11.488 |
jpl | 119 | 67 | 4.774 | 1.003 | 4.787 |
MIT | 234 | 91 | 2.037 | 1.007 | 2.051 |
ngs | 207 | 93 | 31.115 | 1.003 | 31.220 |
sio | 243 | 88 | 1.946 | 1.006 | 1.957 |
mit | 354 | 98 | 1.646 | 1.002 | 1.650 |
ncl | 193 | 97 | 4.220 | 0.900 | 3.797 |
igs | 333 | 99 | 1.427 | 1.007 | 1.437 |
---------------|-----|-----|---------------|---------------|---------------|
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 80 | -0.6 0.1 0.1 | 2.7 2.5 8.1 |
emr 40 | -1.6 0.0 -0.2 | 3.5 2.2 10.1 |
esa 67 | -0.9 0.1 0.0 | 3.9 2.4 9.3 |
gfz 86 | -0.6 0.1 0.2 | 2.8 2.4 8.6 |
jpl 67 | 0.3 0.1 -0.1 | 2.4 3.2 9.3 |
MIT 91 | 0.3 0.1 0.2 | 2.7 2.3 7.6 |
ngs 93 | -0.8 0.2 0.1 | 2.9 2.2 7.6 |
sio 88 | 0.6 0.1 0.5 | 2.7 2.5 7.9 |
mit 97 | -0.8 0.1 0.4 | 2.7 2.2 8.5 |
ncl 97 | -0.2 0.0 0.1 | 1.3 1.3 4.5 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 167 | -0.2 -0.1 -1.2 | 1.1 1.3 3.1 |
emr 65 | -1.1 0.3 -0.4 | 2.4 1.6 5.9 |
esa 109 | -0.5 0.1 -1.4 | 2.8 1.3 3.9 |
gfz 172 | -0.1 0.0 -0.2 | 0.8 0.8 2.5 |
jpl 116 | 1.5 -0.2 0.0 | 1.4 2.3 5.0 |
MIT 204 | 0.7 0.2 0.9 | 0.8 0.9 2.3 |
ngs 193 | -0.3 0.0 -0.3 | 1.9 1.7 3.5 |
sio 234 | 1.4 0.0 0.5 | 1.1 0.9 2.7 |
mit 297 | -0.5 0.1 -0.1 | 0.7 0.5 1.4 |
ncl 184 | 0.5 0.0 -0.2 | 1.7 1.5 4.0 |
ITR 98 | 0.4 -0.3 -0.3 | 2.6 2.1 7.5 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 157 | -0.9 0.1 -0.7 | 2.0 2.1 5.0 |
emr 65 | -1.9 0.3 0.0 | 2.8 1.6 8.3 |
esa 101 | -1.2 0.1 -0.7 | 3.1 2.1 5.6 |
gfz 164 | -0.8 0.3 0.5 | 1.8 2.0 5.0 |
jpl 109 | 0.7 0.3 0.8 | 1.6 2.5 6.6 |
MIT 181 | 0.0 0.4 1.5 | 1.4 1.6 4.3 |
ngs 164 | -1.0 0.1 0.2 | 2.1 2.2 4.7 |
sio 201 | 0.8 0.2 1.2 | 1.7 1.8 4.8 |
mit 239 | -1.1 0.4 0.7 | 1.7 1.8 4.7 |
ncl 180 | -0.3 0.2 0.5 | 1.7 1.7 4.4 |
igs 245 | -0.7 0.3 0.6 | 1.4 1.5 3.8 |
ITR 127 | 0.0 -0.1 -0.1 | 2.6 1.9 7.6 |
---------------|---------------------------|---------------------------|
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 | 0.014 -0.003 -0.009 0.0 0.8 -0.8 0.12 |
emr | 0.044 -0.035 -0.031 8.0 -19.8 -2.3 0.16 |
esa | 0.043 -0.025 0.028 6.5 0.3 -0.5 0.01 |
gfz | 0.010 -0.019 -0.002 1.0 0.3 0.5 -0.27 |
jpl | -0.029 -0.016 -0.031 6.8 -7.1 0.3 0.28 |
MIT | -0.001 -0.006 -0.008 9.6 -10.6 -0.6 -0.16 |
ngs | -0.148 -0.194 0.053 11.8 -11.1 -3.0 -0.99 |
sio | -0.031 -0.178 0.041 11.2 -2.7 3.3 0.19 |
mit | -0.028 0.010 -0.009 -0.1 -0.7 1.3 -0.19 |
ncl | -0.007 -0.009 -0.008 5.8 -4.1 1.2 -0.11 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.10 |
---------------|---------------------------------------------------------------|
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 | 0.045 0.047 0.048 1.2 1.2 1.2 0.18 |
emr | 0.060 0.063 0.069 1.6 1.6 1.6 0.25 |
esa | 0.046 0.050 0.052 1.3 1.2 1.2 0.19 |
gfz | 0.043 0.044 0.048 1.1 1.1 1.1 0.18 |
jpl | 0.050 0.052 0.053 1.3 1.3 1.3 0.20 |
MIT | 0.042 0.043 0.046 1.1 1.1 1.1 0.17 |
ngs | 0.042 0.044 0.046 1.1 1.1 1.1 0.17 |
sio | 0.043 0.045 0.046 1.1 1.1 1.1 0.18 |
mit | 0.040 0.041 0.046 1.1 1.1 1.1 0.17 |
ncl | 0.041 0.042 0.045 1.1 1.1 1.1 0.17 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.41 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 1.8 -1.0 -1.2 | 0.3 0.3 0.3 |
---------------|---------------------------|---------------------------|
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 | --- -1.0 7.7 3.0 3.3 43.5 |
esa | --- 9.2 -1.5 14.1 -7.5 -7.6 |
gfz | --- 3.7 -0.3 -1.0 -1.0 -11.1 |
jpl | --- -13.1 2.7 -1.5 0.7 22.3 |
MIT | --- -3.6 -1.9 -1.4 1.1 -17.2 |
ngs | --- 2.2 0.1 -6.5 1.9 -10.6 |
sio | --- -7.7 0.2 --- 3.9 --- |
mit | --- -0.7 -2.3 4.5 4.0 -13.0 |
ncl | --- 8.8 0.4 --- 2.3 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 3.9 1.8 4.7 -1.3 -11.2 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 3.2 2.4 9.9 3.1 8.6 |
esa | --- 16.2 2.4 4.0 1.6 5.5 |
gfz | --- 4.3 1.8 3.4 1.4 4.4 |
jpl | --- 10.6 2.0 9.3 1.4 19.4 |
MIT | --- 5.0 2.3 11.2 2.2 8.6 |
ngs | --- 9.5 3.9 17.7 4.4 17.8 |
sio | --- 2.6 2.2 --- 3.5 --- |
mit | --- 2.1 1.3 6.3 1.3 9.4 |
ncl | --- 7.1 1.8 --- 0.8 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 12.0 2.9 8.8 4.2 8.1 |
---------------|------------------------------------------------------------|
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 cod14777.snx |BJFS A 1| -8.9 -5.6 -3.6|
ITRF_IGS05.snx cod14777.snx |CAS1 A 3| 4.0 0.9 -27.8|
ITRF_IGS05.snx cod14777.snx |LHAZ A 1| -7.9 -4.5 -15.1|
ITRF_IGS05.snx cod14777.snx |VESL A 1| 2.9 -0.4 -21.9|
| | |
ITRF_IGS05.snx esa14777.snx |GUAM A 4| -12.3 -3.2 -1.6|
| | |
ITRF_IGS05.snx gfz14777.snx |GUAM A 4| -9.5 -5.3 -1.4|
| | |
ITRF_IGS05.snx MIT14777.snx |NYAL A 3| 2.6 -0.3 21.0|
ITRF_IGS05.snx MIT14777.snx |PIE1 A 1| -7.4 6.7 13.8|
ITRF_IGS05.snx MIT14777.snx |QUIN A 3| 2.3 -0.8 19.9|
| | |
ITRF_IGS05.snx MIT14777.snx |STJO A 4| -1.1 3.8 12.8|
| | |
ITRF_IGS05.snx MIT14777.snx |NYA1 A 2| 0.2 0.0 22.7|
| | |
ITRF_IGS05.snx sio14777.snx |NYAL A 3| 4.0 -0.5 27.7|
| | |
ITRF_IGS05.snx sio14777.snx |QUIN A 3| 4.4 -0.7 18.3|
| | |
ITRF_IGS05.snx mit1477g.snx |GUAM A 4| -9.3 -4.8 -5.5|
ITRF_IGS05.snx mit1477g.snx |PIE1 A 1| -7.9 5.2 14.5|
| | |
IGS08P17.snx cod14777.snx |MOBJ A 1| -0.3 3.2 34.3|
| | |
IGS08P17.snx esa14777.snx |WUHN A 4| -12.7 7.1 -19.7|
| | |
IGS08P17.snx gfz14777.snx |NIUM A 1| -21.9 33.0 1.3|
| | |
IGS08P17.snx MIT14777.snx |DNRC A 1| -2.6 -14.7 -5.3|
IGS08P17.snx MIT14777.snx |LASC A 2| -14.5 2.2 -0.1|
| | |
IGS08P17.snx mit1477g.snx |MADR A 1| -19.7 -25.5 -17.0|
IGS08P17.snx mit1477g.snx |NIUM A 1| -22.0 32.4 1.5|
IGS08P17.snx mit1477g.snx |THU3 A 1| 15.3 -2.5 -11.6|
| | |
IGS08P17.snx mit1477g.snx |DNRC A 1| -3.4 -15.4 -5.6|
IGS08P17.snx mit1477g.snx |LASC A 2| -15.9 0.9 0.3|
| | |
IGS08P17.snx ncl1477g.snx |MAC1 A 7| -9.2 -2.7 5.7|
IGS08P17.snx ncl1477g.snx |PETP A 4| 13.2 -5.9 -13.8|
| | |
igs08P1477.snx MIT14777.snx |U062 A 1| -8.6 -0.7 2.8|
igs08P1477.snx MIT14777.snx |U072 A 1| -10.7 4.4 -0.6|
igs08P1477.snx MIT14777.snx |U102 A 1| 5.8 11.4 -3.4|
igs08P1477.snx MIT14777.snx |U132 A 1| 14.5 -3.5 3.6|
| | |
igs08P1477.snx ncl1477g.snx |COCO A 4| 8.4 1.2 1.5|
| | |
IGS08P17.snx igs08P1477.snx |ALRT A 1| 3.5 -2.1 12.1|
IGS08P17.snx igs08P1477.snx |AREQ A 6| -4.0 -0.2 -3.9|
IGS08P17.snx igs08P1477.snx |KOUR A 2| -4.2 -2.5 0.6|
IGS08P17.snx igs08P1477.snx |TRO1 A 5| 0.5 1.5 16.6|
| | |
IGS08P18.snx igs08P1477.snx |U032 A 1|99999.9 99999.9 99999.9|
IGS08P18.snx igs08P1477.snx |U062 A 1|99999.9 -99999.9 99999.9|
IGS08P18.snx igs08P1477.snx |U122 A 1|99999.9 99999.9 99999.9|
-----------------------------------------|------------|-----------------------|
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