[IGSREPORT-13009] Wk 1340 IGS SINEX Combination
Martin Bourassa
mbourass at nrcan.gc.ca
Thu Sep 29 20:19:11 PDT 2005
******************************************************************************
IGS Electronic Report 29 Sep 20:19:17 PDT 2005 Message Number 13009
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1340 - 05/09/11 to 05/09/17
===================================================================
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 cddisa.gsfc.nasa.gov and at garner.ucsd.edu
igs05P1340.snx Combined weekly solution.
igs05P1340.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS05P37.snx Cumulative Combined solution.
igs05P1340.sum This file.
igs05P1340.itr Residuals between the AC and the IGb00 for the RF stations.
igs05P1340.res Residuals between the AC and the Combined Weekly solution.
IGS05P37.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
IGb00 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS03P33_RS99.SNX.Z
3-4) The AC are compared to IGb00, 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 IGb00 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGb00 of the reference epoch
using a 14-parameters transformation and the 99 ITRF station positions
and velocities. The IGb00 is a realization of ITRF2000.
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 = IGS03P33_RS99.SNX
igs = igs05P1340.snx
IGS = IGS05P37.snx
MIT = mit13407.snx
mit = mit1340g.snx
BuA = IERS Bulletin A
mit ncl are used to quality control the weekly combination.
gfz ngs excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
After unconstraining:
cod MANZ
jpl ASPA
MIT MANZ
mit MANZ
4-1) Starting with GPS week 1143, the solutions are aligned to the
IGS03P33_RS99.SNX realization of ITRF2000.
4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
is included in the erp files.
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 | 170 | 71 | 22.614 | 1.000 | 22.625 |
emr | 41 | 27 | 5.158 | 1.000 | 5.160 |
esa | 68 | 52 | 9.267 | 0.999 | 9.257 |
gfz | 181 | 75 | 3.976 | 1.001 | 3.978 |
jpl | 111 | 44 | 5.685 | 1.007 | 5.726 |
MIT | 141 | 63 | 2.361 | 0.997 | 2.354 |
ngs | 143 | 76 | 40.350 | 1.001 | 40.406 |
sio | 165 | 74 | 2.197 | 1.003 | 2.203 |
mit | 265 | 75 | 1.047 | 1.003 | 1.051 |
ncl | 164 | 78 | 1.746 | 0.868 | 1.515 |
igs | 251 | 80 | 1.596 | 1.002 | 1.599 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to the IGb00 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 71 | 1.1 0.2 -1.1 | 3.7 3.6 10.5 |
emr 27 | 1.0 0.2 0.4 | 3.8 3.4 11.8 |
esa 52 | 0.6 0.5 -0.3 | 3.3 2.5 9.2 |
gfz 75 | -0.0 0.2 -0.1 | 3.7 3.9 10.5 |
jpl 44 | 0.7 0.1 0.4 | 4.1 4.0 12.3 |
MIT 63 | 1.7 0.1 0.4 | 3.5 3.7 9.7 |
ngs 76 | -0.4 0.1 0.3 | 4.7 4.6 12.5 |
sio 74 | -0.1 0.0 1.0 | 3.5 3.5 9.9 |
mit 75 | 0.7 0.2 0.3 | 3.1 3.5 10.0 |
ncl 78 | 0.7 0.2 -0.0 | 3.2 3.2 7.7 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 170 | 0.7 0.1 -1.0 | 1.6 1.5 5.0 |
emr 41 | 0.5 -0.6 0.5 | 1.8 2.4 4.5 |
esa 67 | -0.5 0.1 -0.3 | 2.3 2.1 11.6 |
gfz 179 | -0.7 0.1 -0.3 | 1.0 1.0 4.2 |
jpl 111 | -0.1 -0.0 1.9 | 1.5 2.0 8.2 |
MIT 133 | 0.8 -0.3 -0.6 | 1.5 1.8 4.6 |
ngs 142 | -0.7 -0.5 -0.3 | 2.5 3.6 8.0 |
sio 156 | -0.5 -0.6 -0.1 | 1.7 2.0 6.3 |
mit 241 | 0.1 0.2 -0.2 | 0.8 0.6 2.6 |
ncl 163 | 0.2 -0.1 0.6 | 1.0 0.9 3.5 |
ITR 79 | -0.6 -0.3 -1.0 | 3.2 3.5 9.0 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 161 | 0.8 0.4 -1.3 | 2.5 2.4 7.0 |
emr 39 | 0.8 -0.1 0.2 | 2.2 2.9 7.3 |
esa 65 | -0.4 0.3 -1.0 | 2.9 2.1 11.4 |
gfz 171 | -0.6 0.4 -0.2 | 2.2 2.4 6.6 |
jpl 102 | 0.3 0.4 1.6 | 2.7 3.2 10.1 |
MIT 126 | 0.9 0.1 -0.9 | 2.5 2.5 5.7 |
ngs 138 | -0.5 -0.2 -0.3 | 3.4 4.5 9.6 |
sio 148 | -0.5 -0.2 -0.2 | 2.4 2.4 8.7 |
mit 219 | 0.3 0.5 -0.5 | 2.0 2.1 5.4 |
ncl 156 | 0.3 0.2 0.7 | 2.1 2.1 5.1 |
igs 227 | 0.2 0.3 -0.2 | 1.9 2.0 5.0 |
ITR 86 | -0.5 -0.0 -0.8 | 1.8 1.9 5.5 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS03P33_RS99.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 | -0.001 -0.001 -0.006 6.3 10.5 9.8 2.73 |
emr | -0.017 -0.001 -0.041 -5.9 5.4 -1.7 4.04 |
esa | -0.005 -0.015 0.002 0.6 2.9 -4.1 1.43 |
gfz | 0.051 -0.017 -0.011 -1.1 1.5 -3.5 2.00 |
jpl | 0.108 -0.061 0.115 -11.4 8.3 -1.8 1.07 |
MIT | 0.002 -0.002 0.006 -6.7 11.7 3.7 3.21 |
ngs | 0.094 -0.032 -0.007 -0.6 6.7 -10.3 3.55 |
sio | -0.049 0.090 -0.040 -2.9 -1.3 14.8 -2.05 |
mit | -0.002 0.027 -0.023 -2.3 -0.5 -1.6 2.54 |
ncl | 0.017 -0.039 -0.009 -0.7 0.4 -2.8 1.89 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 1.93 |
---------------|---------------------------------------------------------------|
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 | 0.048 0.048 0.053 1.2 1.2 1.2 0.19 |
emr | 0.076 0.077 0.090 2.0 2.0 2.0 0.31 |
esa | 0.053 0.055 0.060 1.4 1.4 1.4 0.22 |
gfz | 0.047 0.046 0.051 1.2 1.2 1.2 0.19 |
jpl | 0.059 0.059 0.066 1.5 1.5 1.5 0.24 |
MIT | 0.050 0.050 0.056 1.3 1.3 1.3 0.20 |
ngs | 0.046 0.046 0.052 1.2 1.2 1.2 0.19 |
sio | 0.047 0.047 0.053 1.2 1.2 1.2 0.19 |
mit | 0.046 0.047 0.053 1.2 1.2 1.2 0.19 |
ncl | 0.046 0.046 0.051 1.2 1.2 1.2 0.18 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 1.93 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -1.8 5.5 5.3 | 3.3 3.4 4.8 |
---------------|---------------------------|---------------------------|
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 | --- 0.1 2.4 --- -3.9 --- |
emr | --- 38.4 3.3 26.4 -2.1 -15.2 |
esa | --- 32.3 -0.0 --- 3.2 --- |
gfz | --- -5.7 -1.3 15.9 4.1 -6.5 |
jpl | --- -35.7 -1.6 9.9 -5.0 -22.5 |
MIT | --- 34.8 3.4 0.2 -7.6 -0.7 |
ngs | --- -23.3 -0.7 29.9 8.9 -16.6 |
sio | --- 0.6 3.2 -1.4 -6.0 1.0 |
mit | --- 25.4 -0.8 0.2 -3.4 -0.1 |
ncl | --- 1.7 0.8 --- 1.5 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -21.0 -1.3 1.5 32.5 -0.8 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 7.2 1.0 --- 1.5 --- |
emr | --- 7.8 4.0 11.6 4.4 21.4 |
esa | --- 27.3 3.9 --- 3.7 --- |
gfz | --- 7.3 1.3 10.1 1.8 6.8 |
jpl | --- 5.1 4.8 18.4 5.1 16.0 |
MIT | --- 6.3 3.6 8.5 2.0 4.2 |
ngs | --- 17.9 5.8 27.4 9.1 32.0 |
sio | --- 6.3 2.8 6.3 2.0 8.1 |
mit | --- 6.5 2.4 3.2 2.1 4.2 |
ncl | --- 2.0 1.1 --- 1.3 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 12.7 5.8 3.8 9.5 9.7 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS03P33_RS99.snx gfz13407.snx |THU3 A ----| 4.3 3.1 -23.7|
| | |
IGS03P33_RS99.snx MIT13407.snx |JAB1 A ----| -12.4 4.3 11.4|
| | |
IGS03P33_RS99.snx mit1340g.snx |JAB1 A ----| -11.9 2.6 6.0|
| | |
jpl13407.snx ncl1340g.snx |TNML A ----| 1.1 -2.9 -97.3|
| | |
MIT13407.snx ncl1340g.snx |TNML A ----| 4.3 -3.0 -88.7|
| | |
sio13407.snx ncl1340g.snx |TNML A ----| 4.1 -1.7 -84.5|
| | |
mit1340g.snx ncl1340g.snx |TNML A ----| 4.3 -0.9 -92.3|
| | |
IGS05P36.snx gfz13407.snx |CNMR A ----| -27.0 33.9 -8.0|
| | |
IGS05P36.snx ngs13407.snx |CNMR A ----| -28.6 51.4 -1.6|
| | |
IGS05P36.snx mit1340g.snx |CNMR A ----| -26.7 37.8 -6.8|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
43001M003 THU3 A
43001M002 THU3 A THU3 A THU3 A THU3 A THU3 A THU2 A THU3 A THU3 A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
40451M123 GODE A GODZ A GODE A GODE A GODE A GODE A GODE A GODE A
50103M108 TIDB A TIDB A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50134M002 DARR A
50134M001 DARW A DARR A DARW A DARW A DARR A DARW A DARW A DARW A DARW A
22306M002 IISC A IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
10422M001 KIR0 A KIR0 A KR0G A KR0G A
20703S001 RAMO A RAMO A RAMO A RAMO A ELRO A RAMO A
RAMO A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A KYW1 A ELEN A UPO1 A OUSD A MTJO A HORN A
CNCL A QUAR A KARA A MAC1 B MAR6 A IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A SG21 A OUSD A CNCL A KARA A SAMP A MERS A VOLT A BRAS A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S014 MAD2 A
13407S012 MADR A MAD2 A MADR A MADR A
MADR A
43001M002 THU2 A THU3 A THU3 A THU3 A
40451M123 GODZ A GODE A GODE A GODE A
GODE A
50103M108 TIDB A TID2 A TIDB A TIDB A
TIDB A
50134M002 DARR A
50134M001 DARW A DARR A DARW A DARW A
DARW A
20703S001 RAMO A RAMO A ELRO A RAMO A
RAMO A
MISSING IERS DOMES NOS AT mit:
-----------------------------
KOD1 A MAC1 B BISH A
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