[IGSREPORT-11792] Wk 1288 IGS SINEX Combination
Remi Ferland
rferland at nrcan.gc.ca
Thu Sep 30 08:20:13 PDT 2004
******************************************************************************
IGS Electronic Report 30 Sep 08:22:06 PDT 2004 Message Number 11792
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1288 - 04/09/12 to 04/09/18
===================================================================
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 and at garner.ucsd.edu
igs04P1288.snx Combined weekly solution.
igs04P1288.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS04P37.snx Cumulative Combined solution.
igs04P1288.sum This file.
igs04P1288.itr Residuals between the AC and the IGb00 for the RF stations.
igs04P1288.res Residuals between the AC and the Combined Weekly solution.
IGS04P37.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 = igs04P1288.snx
IGS = IGS04P37.snx
MIT = mit12887.snx
mit = mit1288g.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:
esa OHI2
gfz OHI2
MIT OHI2
sio OHI2
mit OHI2
ncl OHI2
New stations in the cumulative solution IGS04P37.snx
CNMR A ----
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 | 162 | 78 | 21.427 | 1.002 | 21.465 |
emr | 47 | 37 | 4.192 | 1.001 | 4.198 |
esa | 74 | 61 | 10.808 | 1.001 | 10.818 |
gfz | 175 | 85 | 8.853 | 1.002 | 8.871 |
jpl | 121 | 58 | 5.094 | 1.009 | 5.138 |
MIT | 139 | 66 | 2.460 | 1.001 | 2.464 |
ngs | 80 | 80 | 22.947 | 1.001 | 22.961 |
sio | 175 | 86 | 2.261 | 1.001 | 2.263 |
mit | 265 | 85 | 1.284 | 1.002 | 1.286 |
ncl | 158 | 88 | 2.540 | 1.002 | 2.545 |
igs | 238 | 89 | 1.478 | 1.015 | 1.500 |
---------------|-----|-----|---------------|---------------|---------------|
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 78 | 2.3 0.4 -0.7 | 2.6 2.8 8.8 |
emr 37 | 1.3 0.4 -0.6 | 3.1 2.8 9.3 |
esa 61 | -0.4 0.2 0.2 | 4.4 3.7 10.7 |
gfz 85 | 0.5 0.4 -0.2 | 2.7 2.6 9.2 |
jpl 58 | 1.8 0.4 0.4 | 3.5 3.2 11.2 |
MIT 66 | 1.3 0.3 0.6 | 2.7 2.9 8.9 |
ngs 80 | 1.4 -0.2 -0.8 | 4.2 4.9 11.8 |
sio 86 | 1.9 0.2 -0.9 | 3.2 3.1 8.2 |
mit 85 | 1.1 0.2 -0.2 | 2.5 2.5 8.1 |
ncl 88 | 1.3 0.2 0.2 | 2.4 2.3 7.2 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 161 | 0.8 0.3 -0.5 | 1.1 1.3 4.2 |
emr 47 | 0.0 -0.2 -1.1 | 1.5 1.5 5.2 |
esa 73 | -1.6 -0.4 0.6 | 3.3 3.0 11.6 |
gfz 172 | -0.9 -0.1 -0.2 | 1.3 1.5 4.6 |
jpl 120 | 0.8 0.3 1.0 | 1.9 1.6 7.7 |
MIT 124 | 0.1 -0.2 -0.4 | 1.3 1.4 4.0 |
ngs 80 | 0.2 -0.5 -0.5 | 3.7 4.5 7.9 |
sio 164 | 0.7 -0.3 -0.7 | 1.5 2.3 4.9 |
mit 232 | -0.2 -0.0 -0.4 | 0.5 0.6 2.5 |
ncl 157 | -0.1 -0.1 0.4 | 0.8 0.7 2.5 |
ITR 88 | -1.3 -0.3 -0.6 | 2.4 2.5 7.4 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 134 | 1.9 0.5 -0.9 | 2.2 2.2 7.1 |
emr 43 | 1.0 0.3 -1.1 | 2.2 2.3 7.2 |
esa 71 | -0.5 -0.2 0.7 | 4.6 3.4 11.5 |
gfz 162 | 0.3 0.2 -0.2 | 2.4 2.1 7.2 |
jpl 101 | 1.8 0.5 1.4 | 3.0 2.7 9.5 |
MIT 109 | 1.0 0.1 -0.3 | 2.1 2.2 7.0 |
ngs 80 | 1.1 -0.3 -0.9 | 3.8 4.6 10.5 |
sio 152 | 1.8 -0.1 -1.1 | 2.6 2.8 7.2 |
mit 179 | 0.9 0.2 -0.7 | 2.0 1.9 6.1 |
ncl 148 | 1.0 0.1 0.2 | 2.0 1.8 5.8 |
igs 183 | 1.1 0.3 -0.2 | 1.9 1.8 5.7 |
ITR 92 | -0.4 -0.0 -0.2 | 1.0 0.9 3.0 |
---------------|---------------------------|---------------------------|
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 0.021 -0.058 10.2 8.2 6.1 2.47 |
emr | -0.041 -0.004 -0.108 -7.8 5.3 3.8 3.77 |
esa | -0.027 -0.024 0.020 -1.8 12.8 -2.0 2.44 |
gfz | 0.042 -0.024 0.005 -0.4 0.7 -3.4 1.81 |
jpl | 0.090 -0.068 0.061 -3.0 6.5 -3.0 1.18 |
MIT | 0.192 -0.011 -0.038 -0.8 6.2 -1.8 4.26 |
ngs | 0.016 -0.109 0.084 8.4 -7.9 -14.2 2.87 |
sio | -0.078 0.008 0.011 7.8 -1.0 22.1 2.68 |
mit | -0.004 0.005 -0.023 -1.3 -0.4 -2.5 2.79 |
ncl | 0.014 -0.017 -0.018 -0.7 0.4 -3.1 2.55 |
---------------|---------------------------------------------------------------|
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 0.046 0.050 1.2 1.2 1.2 0.18 |
emr | 0.064 0.067 0.072 1.7 1.7 1.7 0.26 |
esa | 0.049 0.052 0.055 1.3 1.3 1.3 0.20 |
gfz | 0.043 0.044 0.048 1.1 1.1 1.1 0.18 |
jpl | 0.051 0.054 0.056 1.3 1.3 1.3 0.21 |
MIT | 0.047 0.051 0.054 1.3 1.3 1.3 0.20 |
ngs | 0.044 0.045 0.050 1.2 1.2 1.2 0.18 |
sio | 0.042 0.044 0.048 1.1 1.1 1.1 0.17 |
mit | 0.043 0.045 0.049 1.1 1.1 1.1 0.18 |
ncl | 0.042 0.044 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 | 2.3 4.9 0.9 | 3.1 3.1 4.1 |
---------------|---------------------------|---------------------------|
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 | --- 20.5 1.2 --- -0.3 --- |
emr | --- -19.2 -1.6 30.3 -3.8 4.3 |
esa | --- 27.0 12.4 --- 6.2 --- |
gfz | --- -13.4 1.4 1.0 5.5 1.6 |
jpl | --- 26.9 2.2 8.8 -6.3 0.4 |
MIT | --- 13.4 0.9 -1.9 -0.8 0.7 |
ngs | --- 26.0 -14.3 --- 15.4 --- |
sio | --- 11.0 -0.1 4.5 -5.4 -3.9 |
mit | --- 65.9 -1.4 -1.4 1.9 0.5 |
ncl | --- 31.2 6.5 --- 3.6 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 12.4 3.0 -2.2 29.2 1.5 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 9.8 0.5 --- 1.5 --- |
emr | --- 19.9 2.9 5.5 3.4 10.0 |
esa | --- 33.8 6.7 --- 2.2 --- |
gfz | --- 6.0 2.1 5.2 2.2 9.8 |
jpl | --- 19.3 1.6 12.3 2.5 13.9 |
MIT | --- 8.7 4.3 15.9 1.4 5.2 |
ngs | --- 20.1 3.6 --- 5.5 --- |
sio | --- 7.3 3.4 7.0 1.8 9.6 |
mit | --- 13.0 3.4 6.2 1.5 7.3 |
ncl | --- 5.3 0.8 --- 1.1 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 20.5 4.3 5.1 2.9 11.6 |
---------------|------------------------------------------------------------|
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 emr12887.snx |FORT A ----| 2.1 56.1 -8.3|
| | |
gfz12887.snx jpl12887.snx |ASPA A ----| 3.6 -4.8 -50.8|
gfz12887.snx jpl12887.snx |WUHN A 2| 2.8 -0.1 -52.1|
| | |
igs04P1287.snx emr12887.snx |OHI2 A ----| 1.5 5.0 -96.6|
| | |
igs04P1287.snx ngs12887.snx |OHI2 A ----| 11.3 2.7 -109.6|
| | |
IGS04P36.snx MIT12887.snx |NETT A ----| -6.4 17.4 19.9|
IGS04P36.snx MIT12887.snx |TVST A ----| -15.2 -1.3 -15.2|
| | |
IGS04P36.snx mit1288g.snx |NETT A ----| -6.9 19.3 25.5|
| | |
IGS04P36.snx igs04P1288.snx |USUD A ----| 10.0 2.7 2.4|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
43001M003 THU3 A
43001M002 THU2 A THU3 A THU3 A THU3 A THU3 A THU3 A THU2 A THU3 A THU3 A
THU3 A
40451M123 GODE A GODE A GODE A GODE A GODE A GODE A GODE A GODE A
GODZ A
40405S038 GOL2 A
40405S031 GOLD A GOLD A GOLD A GOLD A GOL2 A GOLD A GOLD A
50103M113 TID2 A
50103M108 TIDB A TID2 A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50134M001 DARW A DARR A DARW A DARW A DARW A DARR A DARW A DARW A DARW A DARW A
DARW A
22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A
50107M007 YAR2 A
50107M004 YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
66010M001 DAV1 A DAVR A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
22306M002 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
10023M001 LROC A LROC A LROC A LROC A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A CCV3 A KYW1 A MCD1 A ARP3 A GUAX A UPO1 A
OUSD A MTJO A HORN A NETT A CNCL A QUAR A TVST A KAYT A SAMP A MAR6 A
IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A SG21 A DOAR A OUSD A CNCL A MERS A CAVA A SFEL A VOLT A BRAS A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
43001M002 THU2 A THU3 A THU3 A THU3 A
40451M123 GODE A GODE A GODE A GODE A
GODZ 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
10422M001 KIR0 A KR0G A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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