[IGSREPORT-11035] Wk 1255 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Feb 12 21:01:51 PST 2004
******************************************************************************
IGS Electronic Report 12 Feb 21:01:57 PST 2004 Message Number 11035
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1255 - 04/01/25 to 04/01/31
===================================================================
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
igs04P1255.snx Combined weekly solution.
igs04P1255.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS04P04.snx Cumulative Combined solution.
igs04P1255.sum This file.
igs04P1255.itr Residuals between the AC and the IGb00 for the RF stations.
igs04P1255.res Residuals between the AC and the Combined Weekly solution.
IGS04P04.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 = igs04P1255.snx
IGS = IGS04P04.snx
MIT = mit12557.snx
mit = mit1255g.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:
ITR FAIR JOZE YSSK
After unconstraining:
ngs GUAM KOKB
mit IRKJ
MIT IRKJ
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 | 166 | 81 | 30.026 | 1.003 | 30.128 |
emr | 44 | 33 | 5.767 | 1.005 | 5.797 |
esa | 69 | 59 | 7.747 | 1.006 | 7.792 |
gfz | 178 | 89 | 9.687 | 1.001 | 9.701 |
jpl | 114 | 62 | 5.307 | 1.005 | 5.334 |
MIT | 146 | 72 | 3.098 | 1.041 | 3.226 |
ngs | 78 | 77 | 28.265 | 1.001 | 28.302 |
sio | 172 | 89 | 2.253 | 1.002 | 2.258 |
mit | 260 | 89 | 1.511 | 1.002 | 1.514 |
ncl | 159 | 91 | 3.244 | 0.984 | 3.191 |
igs | 242 | 93 | 1.538 | 1.019 | 1.567 |
---------------|-----|-----|---------------|---------------|---------------|
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 81 | 1.0 -0.0 -0.8 | 2.7 2.5 12.2 |
emr 33 | 0.5 0.1 0.2 | 2.6 2.7 10.9 |
esa 59 | -3.0 0.2 0.6 | 2.8 2.7 11.9 |
gfz 89 | 1.2 -0.1 -0.8 | 2.8 3.0 7.8 |
jpl 62 | 0.2 -0.1 0.4 | 2.8 2.6 9.9 |
MIT 72 | 0.1 0.1 0.2 | 3.1 2.6 9.5 |
ngs 77 | -1.8 0.1 -0.2 | 4.1 5.5 11.4 |
sio 89 | 0.2 0.3 -0.3 | 2.8 3.3 6.9 |
mit 89 | 0.6 0.1 -0.0 | 2.5 2.4 8.0 |
ncl 91 | 0.8 0.0 -0.1 | 2.6 2.4 7.6 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 163 | -0.1 0.2 -0.2 | 1.2 1.2 7.4 |
emr 43 | -0.3 -0.1 0.4 | 1.9 1.7 7.2 |
esa 68 | -3.4 0.3 0.8 | 2.1 1.9 10.3 |
gfz 174 | 0.2 -0.3 -0.9 | 1.4 1.5 4.1 |
jpl 113 | -0.5 -0.3 0.1 | 1.7 1.6 7.2 |
MIT 134 | -0.4 0.0 -0.4 | 1.9 1.9 5.3 |
ngs 77 | -2.5 0.0 0.4 | 3.3 4.6 9.3 |
sio 161 | -0.3 0.2 0.5 | 1.7 2.0 4.1 |
mit 233 | -0.0 0.0 -0.4 | 0.6 0.7 3.2 |
ncl 156 | 0.0 -0.0 0.1 | 0.7 0.6 3.1 |
ITR 92 | -0.8 0.1 0.1 | 2.3 2.3 7.1 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 135 | 0.6 -0.2 -1.1 | 2.6 2.6 11.6 |
emr 43 | 0.2 -0.5 -0.5 | 2.8 2.7 9.4 |
esa 68 | -3.2 -0.1 -0.2 | 2.7 2.9 12.4 |
gfz 161 | 0.8 -0.4 -1.7 | 2.8 2.8 8.2 |
jpl 103 | -0.0 -0.5 -0.1 | 2.5 2.8 8.9 |
MIT 118 | 0.1 -0.1 -1.3 | 2.8 2.4 9.3 |
ngs 78 | -1.8 0.1 0.4 | 4.0 5.4 11.4 |
sio 149 | 0.4 0.1 -0.1 | 2.7 3.1 7.3 |
mit 180 | 0.7 -0.2 -1.2 | 2.8 2.3 8.1 |
ncl 149 | 0.7 -0.3 -0.6 | 2.4 2.3 7.0 |
igs 183 | 0.5 -0.1 -0.9 | 2.1 2.1 7.0 |
ITR 96 | -0.2 0.0 -0.2 | 0.6 0.5 1.6 |
---------------|---------------------------|---------------------------|
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 | 0.013 0.050 0.021 7.9 13.3 -20.4 1.91 |
emr | -0.033 -0.006 -0.007 2.4 16.8 2.7 3.31 |
esa | 0.010 0.023 -0.017 1.5 7.4 -2.8 2.31 |
gfz | 0.053 0.032 0.049 -0.3 2.6 -3.7 1.80 |
jpl | 0.002 0.057 0.013 3.9 6.4 -6.7 1.20 |
MIT | 0.197 -0.039 -0.013 3.4 6.3 4.8 4.14 |
ngs | 0.029 0.216 -0.170 -18.4 14.9 19.1 1.79 |
sio | 0.124 -0.090 0.073 9.3 7.4 30.7 2.55 |
mit | -0.002 0.002 0.002 -0.4 -0.4 -1.8 2.59 |
ncl | -0.010 -0.061 -0.043 2.4 2.1 -6.5 2.72 |
---------------|---------------------------------------------------------------|
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 0.045 0.050 1.2 1.2 1.1 0.18 |
emr | 0.069 0.071 0.077 1.8 1.8 1.8 0.28 |
esa | 0.050 0.052 0.055 1.3 1.3 1.3 0.21 |
gfz | 0.042 0.042 0.047 1.1 1.1 1.1 0.17 |
jpl | 0.050 0.049 0.056 1.3 1.3 1.3 0.20 |
MIT | 0.046 0.047 0.052 1.2 1.2 1.2 0.19 |
ngs | 0.045 0.045 0.052 1.2 1.2 1.2 0.18 |
sio | 0.042 0.043 0.048 1.1 1.1 1.1 0.17 |
mit | 0.042 0.043 0.048 1.1 1.1 1.1 0.17 |
ncl | 0.042 0.042 0.047 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 | -3.6 8.1 0.6 | 1.8 1.9 4.5 |
---------------|---------------------------|---------------------------|
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 | --- 9.1 -1.9 --- -4.4 --- |
emr | --- 12.2 0.3 8.6 -6.7 -5.6 |
esa | --- 9.7 1.3 --- -5.2 --- |
gfz | --- 3.2 3.3 -15.0 7.1 -4.0 |
jpl | --- -22.3 -1.3 -7.6 -4.7 7.3 |
MIT | --- -2.0 1.1 0.5 1.8 -0.0 |
ngs | --- -17.9 -6.3 --- 23.1 --- |
sio | --- -16.1 -3.2 2.6 1.9 -2.6 |
mit | --- 20.3 2.3 0.2 5.3 -0.4 |
ncl | --- 8.0 -1.0 --- 6.6 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -3.2 -1.5 -0.6 30.4 -1.4 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 3.1 2.3 --- 0.7 --- |
emr | --- 6.8 3.5 13.9 1.8 12.6 |
esa | --- 6.5 4.7 --- 2.0 --- |
gfz | --- 4.7 1.7 12.7 1.8 5.8 |
jpl | --- 23.5 3.9 32.5 1.7 10.9 |
MIT | --- 9.7 2.2 5.8 1.1 4.0 |
ngs | --- 41.6 13.4 --- 9.1 --- |
sio | --- 6.5 5.2 5.0 1.4 5.5 |
mit | --- 7.3 1.9 4.6 1.1 3.0 |
ncl | --- 2.7 1.5 --- 0.7 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 16.9 3.4 5.7 2.9 5.7 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
cod12557.snx jpl12557.snx |DWH1 A ----| -0.7 -0.6 -51.6|
| | |
IGS04P03.snx esa12557.snx |KIRU A ----| -4.3 2.3 -75.7|
| | |
IGS04P03.snx gfz12557.snx |FAIR A 2| -2.3 -12.0 9.3|
IGS04P03.snx gfz12557.snx |HNPT A ----| 21.7 -2.0 -9.5|
| | |
IGS04P03.snx jpl12557.snx |KIRU A ----| -3.7 -0.5 -61.6|
| | |
IGS04P03.snx sio12557.snx |KIRU A ----| -3.2 1.3 -45.5|
| | |
IGS04P03.snx ncl1255g.snx |KIRU A ----| -2.1 0.5 -47.0|
| | |
IGS04P03.snx igs04P1255.snx |NETT A ----| 9.4 -38.7 -35.3|
| | |
IGS04P04.snx igs04P1255.snx |FAIR A 2| -1.4 -9.6 -0.3|
IGS04P04.snx igs04P1255.snx |YSSK A ----| 9.7 -3.5 9.9|
-----------------------------------------|------------|-----------------------|
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 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 TID2 A TIDB A TIDB A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A
TID1 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
50107M004 YAR2 A YAR2 A YAR2 A YAR1 A YAR2 A
YAR2 A
12313M002 MDVJ A IRKJ A IRKJ 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
24201M001 ULAB A ULAB A ULAB A ULAB A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A PUR2 A UPO1 A OUSD A HORN A NETT A CNCL A QUAR A
KARA A MAR6 A IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
PUR2 A CONZ A OUSD A CNCL A KARA 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 TIDB A TID2 A TIDB A TIDB A
TID2 A TIDB A
TID1 A
50134M001 DARR A DARW A DARW A DARW A
DARW A
50107M004 YAR2 A YAR2 A YAR1 A YAR2 A
YAR2 A
12313M002 IRKJ A IRKJ A
MDVJ A
10422M001 KIR0 A KR0G A
10403M002 KIRU A KIRU A KIRU A KIRU A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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