[IGSREPORT-10275] Wk 1217 IGS SINEX Combination (resubmitted)
Remi Ferland
ferland at geod.nrcan.gc.ca
Mon May 26 06:19:34 PDT 2003
******************************************************************************
IGS Electronic Report 26 May 06:19:36 PDT 2003 Message Number 10275
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1217 - 03/05/04 to 03/05/10
===================================================================
This is a resubmitted copy of the weekly report. For yet unknown
reasons, the report sent at the usual time on Thursday, did not make it to
the IGS mail. I suspect the problem to be local to GSD.
However, all the usual files did make it to CDDIS.
Sorry for the inconveniences.
Remi,
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
igs03P1217.snx Combined weekly solution.
igs03P1217.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS03P19.snx Cumulative Combined solution.
igs03P1217.sum This file.
igs03P1217.itr Residuals between the AC and the IGS00 for the RF stations.
igs03P1217.res Residuals between the AC and the Combined Weekly solution.
IGS03P19.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
IGS00 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS01P37_RS54.SNX.Z
3-4) The AC are compared to IGS00, 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 IGS00 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGS00 of the reference epoch
using a 14-parameters transformation and the 54 ITRF station positions
and velocities. The IGS00 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 = IGS01P37_RS54.SNX
igs = igs03P1217.snx ( Weekly Combination )
IGS = IGS03P19.snx ( Cumulative Solution )
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:
esa PIMO
ngs GUAM KOKB
ncl QAQ1
4-1) Starting with GPS week 1143, the solutions are aligned to the
IGS01P37_RS54.SNX realization of ITRF2000.
4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
is included in the erp files.
4-3) A discontinuity was introduced for stations BOGT BRMU KOSG.
Weekly/cumulative solutions were reprocessed to properly include
the discontinuity starting with GPS week 1210.
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 | 157 | 43 | 20.119 | 1.004 | 20.190 |
emr | 40 | 21 | 7.872 | 1.002 | 7.887 |
esa | 60 | 39 | 11.597 | 1.001 | 11.611 |
gfz | 175 | 44 | 6.847 | 1.004 | 6.872 |
jpl | 103 | 29 | 4.342 | 1.009 | 4.383 |
ngs | 71 | 44 | 26.297 | 1.001 | 26.318 |
sio | 143 | 45 | 1.923 | 1.003 | 1.929 |
mit | 232 | 44 | 2.004 | 0.992 | 1.988 |
ncl | 136 | 44 | 1.629 | 0.972 | 1.583 |
igs | 207 | 46 | 1.362 | 1.004 | 1.368 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to the IGS00 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 42 | 1.5 0.4 0.0 | 2.5 3.6 10.1 |
emr 20 | -2.5 1.1 -0.2 | 6.8 6.7 8.5 |
esa 38 | -0.4 1.2 -0.3 | 7.1 5.9 11.8 |
gfz 42 | 0.9 0.4 -0.3 | 2.7 3.7 7.5 |
jpl 27 | 0.8 0.1 0.6 | 2.8 2.7 7.7 |
ngs 41 | -4.5 1.3 -0.4 | 6.8 7.1 16.4 |
sio 44 | 0.0 0.9 0.2 | 3.6 4.6 8.3 |
mit 43 | 0.0 0.8 0.2 | 3.3 3.6 6.7 |
ncl 43 | 0.3 0.6 0.0 | 3.4 3.5 5.1 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 154 | 1.1 0.2 0.2 | 1.2 1.5 5.2 |
emr 39 | -2.6 0.5 -0.9 | 5.2 5.8 7.8 |
esa 60 | -1.0 0.8 -2.1 | 5.6 4.0 9.2 |
gfz 172 | 0.3 -0.1 -1.1 | 1.2 1.4 4.5 |
jpl 103 | -0.2 0.3 -0.5 | 1.6 1.7 6.8 |
ngs 71 | -4.6 0.7 1.0 | 5.9 6.6 17.2 |
sio 139 | 0.2 0.2 1.0 | 2.8 2.6 5.9 |
mit 201 | -0.6 0.3 -0.9 | 1.4 1.3 3.0 |
ncl 135 | -0.3 0.2 -0.1 | 1.2 1.0 2.9 |
ITR 45 | -0.6 -0.7 0.4 | 2.8 3.0 7.8 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 136 | 1.4 0.3 0.7 | 1.8 2.3 7.9 |
emr 36 | -2.7 0.6 -1.0 | 6.1 6.2 7.3 |
esa 59 | -0.9 0.7 -1.4 | 6.0 4.4 11.6 |
gfz 139 | 0.5 -0.1 -0.8 | 1.8 2.1 6.9 |
jpl 82 | 0.2 0.4 0.7 | 1.8 1.9 9.4 |
ngs 70 | -4.3 0.7 2.0 | 6.4 7.2 18.4 |
sio 126 | 0.2 0.5 1.7 | 3.5 3.4 8.4 |
mit 155 | -0.4 0.5 -0.5 | 2.4 2.3 6.8 |
ncl 123 | -0.1 0.3 0.8 | 2.3 1.9 5.6 |
igs 160 | 0.2 0.1 0.6 | 1.6 1.8 5.9 |
ITR 54 | -0.3 -0.6 0.1 | 1.8 2.0 3.9 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS01P37_RS54.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 | -0.004 0.002 -0.006 13.1 8.3 17.1 1.64 |
emr | -0.105 -0.065 -0.039 -4.6 0.2 5.9 0.06 |
esa | 0.146 -0.113 0.013 -5.0 5.3 25.4 1.25 |
gfz | 0.035 -0.014 0.056 -1.9 2.5 -0.7 1.04 |
jpl | -0.004 0.012 -0.007 -2.6 2.8 15.7 0.49 |
ngs | 0.061 0.273 -0.148 -12.2 15.4 76.9 0.98 |
sio | -0.076 -0.036 -0.013 8.6 -3.8 33.4 1.17 |
mit | -0.010 -0.016 -0.015 1.5 -1.1 0.8 1.38 |
ncl | -0.024 -0.048 -0.052 1.3 -0.3 -0.8 1.06 |
---------------|---------------------------------------------------------------|
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 | 0.060 0.061 0.068 1.6 1.6 1.6 0.24 |
emr | 0.087 0.089 0.103 2.3 2.3 2.3 0.36 |
esa | 0.064 0.069 0.071 1.7 1.7 1.7 0.27 |
gfz | 0.060 0.061 0.069 1.6 1.6 1.6 0.25 |
jpl | 0.077 0.074 0.089 2.0 1.9 2.0 0.31 |
ngs | 0.062 0.061 0.072 1.6 1.6 1.6 0.25 |
sio | 0.059 0.060 0.068 1.5 1.5 1.5 0.24 |
mit | 0.059 0.061 0.069 1.6 1.6 1.6 0.24 |
ncl | 0.060 0.060 0.069 1.6 1.6 1.6 0.24 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -3.3 3.7 26.4 | 2.3 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 | --- -10.3 .1 --- -4.4 --- |
emr | --- 5.8 2.7 16.5 -.4 4.2 |
esa | --- -20.1 -11.0 --- -12.8 --- |
gfz | --- 14.6 .3 2.9 5.4 2.5 |
jpl | --- -15.6 2.0 -4.5 1.5 10.5 |
ngs | --- 2.8 49.0 -17.3 13.2 -21.2 |
sio | --- -8.1 -.7 -.5 2.5 -12.4 |
mit | --- 21.7 -8.3 -4.2 5.7 -6.0 |
ncl | --- 7.5 -5.2 --- -.3 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -18.4 -.5 -3.3 28.5 -8.1 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 5.2 1.5 --- 1.8 --- |
emr | --- 8.0 3.4 9.8 4.0 6.1 |
esa | --- 15.4 5.3 --- 7.7 --- |
gfz | --- 6.8 1.3 7.8 2.0 8.5 |
jpl | --- 12.2 1.4 8.8 2.7 7.5 |
ngs | --- 20.5 5.8 30.6 7.5 31.9 |
sio | --- 5.3 1.8 4.8 2.0 6.5 |
mit | --- 4.6 2.0 7.5 3.8 8.7 |
ncl | --- 2.0 1.6 --- .6 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 11.9 4.5 7.9 4.6 8.2 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
cod12177.snx ngs12177.snx |WUHN A 2| 3.3 4.8 62.5|
| | |
gfz12177.snx ngs12177.snx |LHAS A ----| 3.7 5.3 53.1|
| | |
jpl12177.snx ngs12177.snx |LPGS A ----| -6.7 1.8 53.4|
| | |
jpl12177.snx mit1217g.snx |CAGZ A ----| -0.1 1.6 105.7|
| | |
igs03P1216.snx esa12177.snx |REDU A ----| -24.8 -26.3 -0.5|
| | |
igs03P1216.snx mit1217g.snx |REDU A ----| -22.1 -27.2 -2.2|
| | |
IGS03P18.snx gfz12177.snx |KELY A ----| 0.1 2.5 52.1|
| | |
IGS03P18.snx jpl12177.snx |GUAO A ----| -2.0 0.7 84.2|
| | |
IGS03P18.snx mit1217g.snx |GUAO A ----| -2.7 1.5 81.4|
IGS03P18.snx mit1217g.snx |UPO1 A ----| 2.5 -2.5 89.7|
| | |
IGS03P18.snx ncl1217g.snx |KELY A ----| -0.6 2.2 52.8|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A
66010M001 DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
DAVR A
40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
22306M002 IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
43005M002 KELY B KELY B KELY B KELY B
43005M001 KELY B KELY A KELY A
13407S012 MADR A MADR A MAD2 A MAD2 A MADR A MADR A
22003M001 PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A
30314M002 SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A TIDB A
TID1 A TID2 A
TID2 A
50107M004 YAR2 A YAR2 A YAR1 A YAR1 A
49970S001 HNLC A HNLC A HNLC A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
CAVA A SFEL A VOLT A BRAS A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S012 MADR A MADR A MADR A
MAD2 A
40405S031 GOLD A GOLD A GOLD A GOLD A
GOL2 A
50103M108 TIDB A TID2 A TIDB A TIDB A
TID2 A TIDB A
TID1 A
50107M004 YAR2 A YAR1 A YAR1 A
66010M001 DAV1 A DAV1 A DAV1 A DAV1 A
DAVR A
12711M003 MEDI A MEDI A MEDI A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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