[IGSREPORT-10969] Wk 1252 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Jan 22 21:28:46 PST 2004
******************************************************************************
IGS Electronic Report 22 Jan 21:28:50 PST 2004 Message Number 10969
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1252 - 04/01/04 to 04/01/10
===================================================================
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
igs04P1252.snx Combined weekly solution.
igs04P1252.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS04P01.snx Cumulative Combined solution.
igs04P1252.sum This file.
igs04P1252.itr Residuals between the AC and the IGS00 for the RF stations.
igs04P1252.res Residuals between the AC and the Combined Weekly solution.
IGS04P01.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 = igs04P1252.snx
IGS = IGS04P01.snx
MIT = mit12527.snx
mit = mit1252g.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:
ngs KOKB
esa FAIR
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.
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 | 33 | 29.445 | 1.000 | 29.447 |
emr | 56 | 27 | 5.376 | 1.000 | 5.375 |
esa | 58 | 40 | 7.304 | 1.000 | 7.304 |
gfz | 177 | 40 | 8.677 | 1.000 | 8.677 |
MIT | 141 | 40 | 3.343 | 1.000 | 3.344 |
jpl | 110 | 29 | 5.101 | 1.000 | 5.102 |
ngs | 76 | 41 | 23.847 | 1.000 | 23.848 |
sio | 169 | 40 | 2.178 | 1.000 | 2.179 |
mit | 255 | 40 | 1.569 | 1.000 | 1.569 |
ncl | 154 | 39 | 2.037 | 1.632 | 3.324 |
igs | 234 | 41 | 1.447 | 0.999 | 1.446 |
---------------|-----|-----|---------------|---------------|---------------|
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 33 | 1.3 0.4 -1.4 | 3.2 4.3 13.6 |
emr 27 | 0.6 0.2 0.3 | 3.9 3.5 10.5 |
esa 40 | -1.8 0.3 0.3 | 4.0 5.2 13.3 |
gfz 40 | -0.3 0.6 -0.3 | 3.8 4.4 10.7 |
MIT 40 | 1.3 0.5 0.6 | 3.6 4.0 12.3 |
jpl 29 | 0.0 0.0 -0.1 | 4.2 3.8 10.2 |
ngs 41 | -2.5 1.7 -0.4 | 7.3 7.9 10.4 |
sio 40 | -0.5 0.6 0.2 | 3.9 4.7 7.3 |
mit 40 | 0.2 0.5 -0.0 | 3.4 3.9 10.4 |
ncl 39 | 0.1 0.3 0.2 | 3.5 3.7 8.9 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 157 | 1.1 0.8 0.7 | 1.5 1.3 8.0 |
emr 53 | 0.3 0.7 -1.3 | 1.8 2.0 6.9 |
esa 57 | -2.1 -0.1 1.5 | 1.7 2.6 10.8 |
gfz 171 | -0.9 0.2 -0.9 | 1.3 1.4 4.5 |
MIT 127 | 1.4 0.8 0.1 | 2.1 2.0 5.8 |
jpl 108 | -0.1 -0.2 0.6 | 2.5 1.9 6.7 |
ngs 74 | -3.3 1.3 0.3 | 5.3 6.7 11.2 |
sio 155 | -0.2 0.0 0.3 | 1.9 2.4 5.0 |
mit 226 | -0.2 0.1 -0.2 | 0.9 0.8 2.4 |
ncl 150 | -0.2 0.7 0.3 | 1.1 1.0 3.3 |
ITR 40 | -0.2 -0.8 -0.2 | 3.6 3.6 8.9 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 130 | 0.9 0.6 0.7 | 2.7 2.3 12.2 |
emr 50 | 0.2 0.4 -1.6 | 2.9 3.0 9.8 |
esa 57 | -2.6 -0.3 1.1 | 2.6 3.6 12.2 |
gfz 160 | -1.2 0.1 -1.2 | 2.7 2.7 7.6 |
MIT 120 | 0.9 0.6 -0.5 | 2.8 2.7 8.5 |
jpl 97 | -0.4 -0.6 0.4 | 3.0 2.4 9.4 |
ngs 75 | -3.3 1.1 -0.0 | 5.7 6.8 11.3 |
sio 143 | -0.4 0.1 0.2 | 3.0 3.4 7.7 |
mit 178 | -0.5 0.1 -0.5 | 2.2 2.4 6.9 |
ncl 141 | -0.4 0.6 -0.3 | 2.4 2.2 6.7 |
igs 179 | -0.4 -0.1 -0.4 | 2.0 2.1 6.5 |
ITR 54 | -0.7 -0.7 0.2 | 3.0 2.6 4.9 |
---------------|---------------------------|---------------------------|
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 | 0.002 -0.002 -0.017 8.9 12.1 -7.1 1.40 |
emr | -0.016 -0.058 -0.023 -2.0 17.3 -2.6 3.56 |
esa | -0.005 -0.088 -0.002 1.4 14.2 -4.0 2.01 |
gfz | 0.051 -0.018 0.039 -1.9 1.8 -2.7 1.58 |
MIT | 0.154 -0.017 -0.046 2.8 4.7 5.9 2.78 |
jpl | 0.002 -0.021 0.010 -4.8 7.0 -6.0 0.93 |
ngs | 0.124 -0.017 -0.096 -0.7 15.6 6.2 1.83 |
sio | -0.015 -0.045 0.090 4.9 -3.2 40.3 2.02 |
mit | -0.019 -0.019 -0.004 -1.4 -2.1 -0.7 2.00 |
ncl | 0.005 -0.083 -0.069 0.9 2.2 -3.3 2.19 |
---------------|---------------------------------------------------------------|
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 | 0.069 0.069 0.078 1.8 1.8 1.8 0.28 |
emr | 0.074 0.073 0.091 1.9 1.9 1.9 0.30 |
esa | 0.062 0.063 0.073 1.6 1.6 1.6 0.25 |
gfz | 0.062 0.062 0.072 1.6 1.6 1.6 0.25 |
MIT | 0.062 0.062 0.072 1.6 1.6 1.6 0.25 |
jpl | 0.073 0.070 0.086 1.9 1.9 1.9 0.29 |
ngs | 0.062 0.061 0.072 1.6 1.6 1.6 0.25 |
sio | 0.063 0.063 0.072 1.6 1.6 1.6 0.25 |
mit | 0.062 0.062 0.073 1.6 1.6 1.6 0.25 |
ncl | 0.064 0.063 0.073 1.6 1.7 1.6 0.26 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -0.2 8.1 -0.2 | 1.9 2.0 4.2 |
---------------|---------------------------|---------------------------|
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 | --- 3.1 -2.1 --- -4.8 --- |
emr | --- -1.1 0.2 10.0 -0.8 7.4 |
esa | --- 5.9 -5.1 --- 5.0 --- |
gfz | --- -13.2 3.4 -10.0 1.4 15.8 |
MIT | --- 4.2 -4.2 -0.1 -2.1 -0.5 |
jpl | --- -14.2 -3.1 3.8 1.8 12.2 |
ngs | --- -21.2 -9.7 --- -0.2 --- |
sio | --- 24.4 -1.8 -2.3 8.4 2.5 |
mit | --- 20.9 -3.6 0.2 2.3 -0.9 |
ncl | --- 8.2 5.4 --- -0.9 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -6.0 -8.1 0.7 27.7 -0.4 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 7.3 1.3 --- 1.1 --- |
emr | --- 13.1 2.7 11.3 2.2 7.3 |
esa | --- 16.3 4.8 --- 4.1 --- |
gfz | --- 8.0 1.8 9.3 2.1 6.8 |
MIT | --- 4.2 3.1 7.1 2.5 9.7 |
jpl | --- 30.3 3.2 19.8 3.3 6.8 |
ngs | --- 32.9 3.4 --- 4.6 --- |
sio | --- 8.3 1.5 7.7 1.5 4.1 |
mit | --- 6.8 3.4 6.0 2.2 3.9 |
ncl | --- 3.4 2.1 --- 1.5 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 17.0 5.1 14.7 2.6 4.9 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS01P37_RS54.snx esa12527.snx |CHAT A ----| -2.1 0.5 -70.0|
| | |
IGS01P37_RS54.snx sio12527.snx |MCM4 A ----| -2.4 3.7 32.1|
| | |
IGS01P37_RS54.snx ncl1252g.snx |GODE A ----| 0.5 9.8 9.2|
IGS01P37_RS54.snx ncl1252g.snx |MCM4 A ----| -2.3 0.5 31.1|
| | |
cod12527.snx jpl12527.snx |DWH1 A ----| -3.1 -1.3 -51.4|
| | |
IGS03P53.snx esa12527.snx |GOL2 A ----| 11.0 60.0 -0.5|
| | |
IGS03P53.snx MIT12527.snx |HORN A ----| 3.6 10.4 212.9|
IGS03P53.snx MIT12527.snx |NETT A ----| 26.4 53.8 18.0|
| | |
IGS03P53.snx mit1252g.snx |HORN A ----| 3.7 11.1 217.2|
IGS03P53.snx mit1252g.snx |NETT A ----| 26.6 54.2 22.8|
| | |
IGS03P53.snx ncl1252g.snx |ALBH A ----| -0.7 -3.2 18.4|
| | |
IGS03P53.snx igs04P1252.snx |HERS A ----| -0.8 10.8 -3.3|
IGS03P53.snx igs04P1252.snx |IRKT A ----| 1.1 -8.1 8.0|
IGS03P53.snx igs04P1252.snx |MAG0 A ----| 9.3 5.2 -0.6|
IGS03P53.snx igs04P1252.snx |YSSK A ----| 9.9 -4.5 8.8|
-----------------------------------------|------------|-----------------------|
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 THU2 A THU3 A THU3 A
40405S031 GOL2 A GOLD A GOL2 A GOL2 A GOLD A GOL2 A GOL2 A GOLD A GOLD A
GOLD A
50103M108 TID2 A TID2 A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
TID1 A TIDB A TID2 A TIDB A
TIDB A
50134M001 DARW A DARR A DARW A DARW A DARW A DARW A DARW A DARW A
DARR A
50107M004 YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR1 A YAR2 A
YAR2 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 DAVR A
22306M002 IISC A IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
30314M002 SUTH A SUTH A SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
10422M001 KIR0 A KR0G A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
PALM A PUR3 A PUR2 A MIA3 A KYW1 A UPO1 A ASPA A OUSD A MTJO A HORN A
NETT A CNCL A QUAR A KARA A SAMP 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 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 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
66010M001 DAV1 A DAV1 A DAV1 A DAV1 A
DAVR A DAVR A
10422M001 KIR0 A KR0G A
11206M006 PENC A PENC A PENC A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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