[IGSREPORT-11137] Wk 1260 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Mar 18 08:53:31 PST 2004
******************************************************************************
IGS Electronic Report 18 Mar 08:53:35 PST 2004 Message Number 11137
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1260 - 04/02/29 to 04/03/06
===================================================================
1) Contacts:
============
e-mail: ferland at geod.nrcan.gc.ca
Tel: (613)995-4002 (Remi Ferland)
Fax: (613)995-3215
2) Products:
============
All products are available at cddisa.gsfc.nasa.gov
igs04P1260.snx Combined weekly solution.
igs04P1260.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS04P09.snx Cumulative Combined solution.
igs04P1260.sum This file.
igs04P1260.itr Residuals between the AC and the IGb00 for the RF stations.
igs04P1260.res Residuals between the AC and the Combined Weekly solution.
IGS04P09.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 = igs04P1260.snx
IGS = IGS04P09.snx
MIT = mit12607.snx
mit = mit1260g.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:
After unconstraining:
gfz BAKO
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 | 160 | 75 | 27.018 | 1.000 | 27.018 |
emr | 43 | 32 | 4.834 | 1.000 | 4.834 |
esa | 70 | 59 | 8.805 | 1.000 | 8.805 |
gfz | 173 | 84 | 9.274 | 1.000 | 9.274 |
jpl | 115 | 61 | 5.081 | 1.000 | 5.081 |
MIT | 143 | 70 | 2.922 | 1.000 | 2.922 |
ngs | 77 | 76 | 27.465 | 1.000 | 27.465 |
sio | 170 | 83 | 2.143 | 1.000 | 2.143 |
mit | 257 | 84 | 1.586 | 1.068 | 1.694 |
ncl | 152 | 87 | 2.852 | 1.000 | 2.852 |
igs | 234 | 89 | 1.404 | 1.000 | 1.404 |
---------------|-----|-----|---------------|---------------|---------------|
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 75 | 1.7 0.0 -0.8 | 2.3 2.0 8.9 |
emr 32 | -0.3 0.2 0.2 | 2.7 2.2 8.2 |
esa 59 | -1.9 0.4 1.0 | 3.7 3.3 10.5 |
gfz 84 | 0.6 0.2 -0.5 | 2.8 2.2 8.1 |
jpl 61 | 0.2 -0.0 0.7 | 2.8 2.2 9.3 |
MIT 70 | 0.3 0.4 -0.1 | 2.4 2.4 9.4 |
ngs 76 | -0.6 0.8 -1.1 | 6.2 5.3 10.5 |
sio 83 | 0.1 0.3 0.0 | 2.8 2.9 7.3 |
mit 84 | 0.4 0.1 0.2 | 2.2 2.1 7.4 |
ncl 87 | 0.7 0.1 -0.0 | 2.3 1.9 6.6 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 157 | 1.0 -0.1 0.1 | 1.3 1.0 6.9 |
emr 42 | -0.6 0.5 0.5 | 1.6 1.5 4.9 |
esa 68 | -2.4 0.2 1.3 | 3.2 2.3 9.9 |
gfz 167 | -0.0 -0.1 -0.3 | 1.4 1.5 5.0 |
jpl 113 | -0.5 -0.1 -0.6 | 1.4 1.4 7.9 |
MIT 129 | 0.1 0.4 -0.7 | 1.5 1.6 5.0 |
ngs 76 | -1.1 0.6 -1.1 | 5.5 4.9 8.5 |
sio 155 | 0.1 0.1 0.3 | 1.8 2.1 3.8 |
mit 225 | -0.0 -0.0 -0.4 | 0.6 0.7 3.4 |
ncl 149 | 0.2 -0.1 0.1 | 0.4 0.5 2.8 |
ITR 88 | -0.4 -0.0 -0.4 | 2.3 1.8 6.8 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 129 | 1.3 -0.2 0.0 | 2.4 2.3 9.4 |
emr 41 | -0.3 0.1 0.0 | 2.9 2.1 6.9 |
esa 69 | -2.2 -0.0 1.3 | 3.7 3.2 10.3 |
gfz 156 | 0.1 -0.1 0.0 | 2.9 2.5 8.0 |
jpl 100 | -0.2 -0.2 0.5 | 2.7 2.5 9.0 |
MIT 113 | 0.4 0.1 -0.4 | 2.4 2.6 8.0 |
ngs 77 | -0.8 0.7 -0.6 | 5.9 5.2 9.9 |
sio 145 | 0.4 -0.0 0.7 | 2.6 2.8 6.9 |
mit 174 | 0.2 -0.1 0.3 | 2.2 2.5 7.0 |
ncl 142 | 0.5 -0.2 0.2 | 2.1 2.1 6.2 |
igs 178 | 0.2 0.0 0.3 | 1.9 1.8 5.8 |
ITR 96 | -0.2 0.0 -0.2 | 0.6 0.5 1.8 |
---------------|---------------------------|---------------------------|
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 | 0.019 0.009 0.021 10.8 10.3 11.3 2.05 |
emr | 0.001 -0.025 0.005 -2.5 7.0 -13.3 3.59 |
esa | 0.007 -0.019 0.015 2.0 10.8 5.9 2.06 |
gfz | 0.037 0.029 0.026 -1.6 2.4 -2.2 1.77 |
jpl | 0.039 0.023 0.048 -6.4 3.3 7.3 1.12 |
MIT | 0.178 0.009 -0.049 -0.1 7.0 -0.1 4.23 |
ngs | 0.111 -0.180 0.055 12.8 4.2 -30.3 2.78 |
sio | 0.026 -0.079 0.131 10.6 -3.4 35.7 2.66 |
mit | -0.000 -0.000 -0.001 -0.2 -0.3 -1.4 2.71 |
ncl | 0.003 -0.060 -0.033 2.1 1.3 -4.7 2.66 |
---------------|---------------------------------------------------------------|
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 | 0.046 0.046 0.051 1.2 1.2 1.2 0.19 |
emr | 0.067 0.068 0.081 1.8 1.8 1.8 0.28 |
esa | 0.051 0.051 0.055 1.3 1.3 1.3 0.21 |
gfz | 0.043 0.043 0.048 1.1 1.1 1.1 0.18 |
jpl | 0.051 0.050 0.056 1.3 1.3 1.3 0.20 |
MIT | 0.046 0.047 0.053 1.2 1.2 1.2 0.19 |
ngs | 0.045 0.045 0.051 1.2 1.2 1.2 0.18 |
sio | 0.043 0.044 0.049 1.1 1.1 1.1 0.18 |
mit | 0.043 0.044 0.049 1.1 1.1 1.1 0.18 |
ncl | 0.043 0.043 0.048 1.1 1.1 1.1 0.17 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 8.1 6.9 3.5 | 1.8 1.8 3.9 |
---------------|---------------------------|---------------------------|
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 | --- -34.6 -1.3 --- -3.3 --- |
emr | --- 38.7 -1.0 3.7 -4.4 3.3 |
esa | --- 47.8 8.9 --- 6.0 --- |
gfz | --- 8.9 1.6 -6.0 5.5 -7.3 |
jpl | --- -5.9 -1.8 -31.9 -1.5 -3.4 |
MIT | --- -12.1 -1.7 1.0 0.3 -1.2 |
ngs | --- -109.0 -0.3 --- 31.7 --- |
sio | --- -14.2 -2.3 -5.0 -3.0 -3.8 |
mit | --- -17.1 -2.4 1.5 2.7 -1.0 |
ncl | --- -3.7 4.2 --- 11.7 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -28.2 -2.6 2.6 28.3 -0.0 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 4.6 1.2 --- 2.2 --- |
emr | --- 8.3 2.8 13.7 3.8 15.0 |
esa | --- 15.3 3.9 --- 2.9 --- |
gfz | --- 11.4 4.5 9.8 3.1 9.8 |
jpl | --- 47.2 2.9 13.9 3.4 12.8 |
MIT | --- 4.7 2.8 2.9 2.7 6.5 |
ngs | --- 37.3 8.1 --- 7.6 --- |
sio | --- 12.9 1.7 6.6 2.0 5.9 |
mit | --- 7.3 3.0 3.7 2.3 4.2 |
ncl | --- 1.6 0.8 --- 0.8 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 17.8 4.6 10.5 3.6 9.3 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
igs04P1259.snx gfz12607.snx |BAY2 A ----| 1.6 -1.7 56.2|
| | |
igs04P1259.snx mit1260g.snx |BAY2 A ----| 1.9 0.6 51.4|
| | |
IGS04P08.snx gfz12607.snx |OBET A ----| 0.2 -2.4 -55.4|
| | |
IGS04P08.snx mit1260g.snx |OBET A ----| 1.0 -2.4 -58.9|
| | |
IGS04P08.snx igs04P1260.snx |NETT A ----| 3.6 -12.1 -27.3|
IGS04P08.snx igs04P1260.snx |TROM A ----| 10.3 -2.7 -10.4|
IGS04P08.snx igs04P1260.snx |YSSK A ----| 9.7 -5.5 12.5|
IGS04P08.snx igs04P1260.snx |ZWEN A ----| -7.1 -8.7 -1.1|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
13407S012 MAD2 A MADR A MAD2 A MAD2 A MADR A MADR A
MADR A
43001M002 THU3 A THU2 A THU3 A THU3 A THU3 A THU3 A THU3 A THU2 A THU3 A THU3 A
40405S031 GOL2 A GOLD A GOL2 A GOLD A GOLD A GOLD B GOL2 A GOLD A GOLD A
50103M108 TID1 A TID2 A TIDB A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A
TID2 A TID2 A TIDB A
TIDB A
50134M001 DARR A DARR A DARW A DARW A DARW A DARW A DARW A DARW A DARW A
DARW A
50107M004 YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
YAR2 A YAR2 A
12313M002 MDVJ A IRKJ A
66010M001 DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
DAVR A DAVR A
22306M002 IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
10422M001 KIR0 A KR0G A
22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A PUR2 A ELEN A UPO1 A OUSD A MTJO A HORN A NETT A
CNCL A QUAR A KARA A SAMP A MAR6 A IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PMON A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A PUR2 A DOAR A OUSD A CNCL A KARA A MERS A CAVA A SFEL A VOLT A
BRAS A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S012 MAD2 A MAD2 A MADR A MADR A
MADR A
43001M002 THU2 A THU3 A THU3 A THU3 A
THU3 A
40405S031 GOLD A GOL2 A GOLD A GOLD A
GOL2 A GOLD A
50103M108 TID2 A TID2 A TIDB A TIDB A
TIDB A TIDB A
TID1 A
50134M001 DARR A DARW A DARW A DARW A
DARW A
50107M004 YAR2 A YAR2 A YAR1 A YAR1 A
YAR2 A YAR2 A
12313M002 IRKJ A
MDVJ A
66010M001 DAV1 A DAV1 A DAV1 A DAV1 A
DAVR A DAVR A
10422M001 KIR0 A KR0G A
12217M001 WROC A WROC A
MISSING IERS DOMES NOS AT mit:
-----------------------------
PMON A BISH A
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