[IGSREPORT-12871] Wk 1334 IGS SINEX Combination
Remi Ferland
rferland at nrcan.gc.ca
Thu Aug 18 17:50:48 PDT 2005
******************************************************************************
IGS Electronic Report 18 Aug 17:50:55 PDT 2005 Message Number 12871
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1334 - 05/07/31 to 05/08/06
===================================================================
1) Contacts:
============
e-mail: RFerland at 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
igs05P1334.snx Combined weekly solution.
igs05P1334.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS05P31.snx Cumulative Combined solution.
igs05P1334.sum This file.
igs05P1334.itr Residuals between the AC and the IGb00 for the RF stations.
igs05P1334.res Residuals between the AC and the Combined Weekly solution.
IGS05P31.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 = igs05P1334.snx
IGS = IGS05P31.snx
MIT = mit13347.snx
mit = mit1334g.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:
jpl ASPA
sio WUHN
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 | 171 | 69 | 24.348 | 1.000 | 24.355 |
emr | 40 | 29 | 5.640 | 1.001 | 5.647 |
esa | 67 | 52 | 10.232 | 1.003 | 10.261 |
gfz | 186 | 78 | 5.424 | 1.030 | 5.588 |
MIT | 145 | 63 | 2.773 | 1.003 | 2.781 |
jpl | 129 | 49 | 5.527 | 1.047 | 5.784 |
ngs | 146 | 77 | 37.619 | 1.002 | 37.699 |
sio | 171 | 77 | 2.298 | 1.002 | 2.303 |
mit | 280 | 77 | 1.209 | 1.025 | 1.240 |
ncl | 169 | 80 | 2.679 | 0.963 | 2.580 |
igs | 263 | 81 | 1.558 | 1.037 | 1.616 |
---------------|-----|-----|---------------|---------------|---------------|
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 69 | 1.4 0.2 -1.1 | 3.2 3.8 11.4 |
emr 29 | 0.7 0.3 0.8 | 3.3 4.5 14.6 |
esa 52 | 1.9 0.6 0.1 | 3.3 2.9 8.8 |
gfz 77 | 0.7 0.3 -0.6 | 3.6 3.7 12.3 |
MIT 63 | 0.1 0.2 0.5 | 3.9 3.9 11.8 |
jpl 49 | 1.1 0.3 -0.3 | 3.9 4.0 13.4 |
ngs 77 | -0.3 0.5 0.4 | 4.3 4.8 13.5 |
sio 77 | 1.3 0.3 0.8 | 3.8 4.2 12.1 |
mit 77 | 1.2 0.3 0.2 | 3.4 3.8 11.6 |
ncl 80 | 1.1 0.3 0.1 | 3.4 3.5 10.3 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 170 | 0.1 0.1 -0.9 | 1.4 1.1 4.0 |
emr 40 | -0.9 0.4 1.5 | 2.0 2.0 5.8 |
esa 65 | 0.4 0.0 -0.5 | 2.4 2.3 10.9 |
gfz 183 | -0.3 -0.2 -0.6 | 1.2 1.2 4.6 |
MIT 136 | -0.9 -0.0 -0.4 | 1.4 1.8 4.0 |
jpl 129 | 0.0 0.1 0.9 | 1.7 1.8 7.2 |
ngs 145 | -1.1 0.3 0.6 | 2.3 3.2 7.4 |
sio 163 | 0.7 0.1 -0.4 | 1.3 1.7 3.5 |
mit 256 | 0.4 0.1 -0.2 | 0.7 0.5 2.4 |
ncl 167 | 0.1 -0.1 0.3 | 0.7 0.5 3.0 |
ITR 80 | -1.0 -0.4 -1.6 | 3.3 3.8 10.8 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 161 | 1.0 0.4 -1.6 | 2.6 2.3 8.2 |
emr 39 | 0.4 0.6 1.6 | 2.4 2.9 9.4 |
esa 64 | 1.0 0.2 -0.3 | 3.3 2.0 9.5 |
gfz 175 | 0.5 0.2 -0.8 | 2.8 2.2 8.6 |
MIT 130 | -0.1 0.1 -0.3 | 2.8 2.7 7.2 |
jpl 116 | 1.3 0.5 0.0 | 3.4 3.0 10.3 |
ngs 141 | -0.3 0.4 0.2 | 3.0 4.3 10.0 |
sio 156 | 1.2 0.3 -0.6 | 2.6 3.1 7.9 |
mit 230 | 1.2 0.3 -0.6 | 2.6 2.4 7.1 |
ncl 161 | 0.9 0.3 0.3 | 2.7 2.2 6.6 |
igs 236 | 0.8 0.3 -0.3 | 2.4 2.3 6.8 |
ITR 86 | -0.5 -0.0 -0.8 | 1.7 1.8 5.3 |
---------------|---------------------------|---------------------------|
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 | 0.007 0.015 -0.010 3.7 13.6 -4.7 2.67 |
emr | -0.033 -0.028 -0.030 -9.6 4.5 -12.3 3.89 |
esa | 0.011 -0.004 0.001 -1.1 7.6 -13.1 1.50 |
gfz | 0.048 -0.026 -0.015 -1.8 1.9 -4.1 2.13 |
MIT | 0.117 0.072 -0.019 -7.2 8.3 -8.1 3.20 |
jpl | 0.101 -0.050 0.086 -5.1 7.1 -14.6 1.32 |
ngs | 0.086 -0.007 -0.029 -7.7 6.9 -21.7 3.37 |
sio | 0.021 0.032 -0.044 -0.8 1.0 3.2 2.81 |
mit | -0.017 0.022 -0.021 -2.7 -0.8 -2.5 2.61 |
ncl | 0.024 -0.030 -0.022 -1.4 1.6 -4.5 2.32 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 2.54 |
---------------|---------------------------------------------------------------|
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 | 0.048 0.047 0.055 1.2 1.2 1.2 0.19 |
emr | 0.074 0.074 0.080 1.9 1.9 1.9 0.30 |
esa | 0.053 0.054 0.062 1.4 1.4 1.4 0.22 |
gfz | 0.045 0.044 0.052 1.2 1.2 1.2 0.18 |
MIT | 0.049 0.049 0.057 1.3 1.3 1.3 0.20 |
jpl | 0.056 0.055 0.063 1.4 1.4 1.4 0.23 |
ngs | 0.046 0.045 0.052 1.2 1.2 1.2 0.18 |
sio | 0.046 0.045 0.052 1.2 1.2 1.2 0.18 |
mit | 0.045 0.045 0.053 1.2 1.2 1.2 0.18 |
ncl | 0.044 0.044 0.051 1.2 1.2 1.2 0.18 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.91 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -2.4 6.7 -6.9 | 3.4 3.4 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 | --- -34.7 0.3 --- -3.6 --- |
emr | --- -24.6 5.3 -4.0 2.1 22.2 |
esa | --- -26.2 -1.9 --- -0.2 --- |
gfz | --- -3.6 1.2 -5.6 -0.4 8.1 |
MIT | --- 45.3 0.8 0.2 0.2 -0.8 |
jpl | --- -37.8 2.9 -10.8 -0.4 -3.6 |
ngs | --- -13.5 3.8 7.3 6.3 19.8 |
sio | --- 48.5 0.6 -0.9 0.8 -2.9 |
mit | --- 37.4 -0.5 0.1 1.9 0.1 |
ncl | --- 0.1 2.4 --- 3.8 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -27.8 -2.3 0.2 33.8 0.7 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 6.0 1.5 --- 1.6 --- |
emr | --- 4.9 2.7 12.3 2.2 15.4 |
esa | --- 15.0 3.0 --- 3.4 --- |
gfz | --- 2.7 2.4 12.2 1.6 10.5 |
MIT | --- 2.7 3.6 7.5 2.1 5.7 |
jpl | --- 22.0 2.6 14.3 1.2 5.9 |
ngs | --- 15.7 5.2 24.4 5.8 27.8 |
sio | --- 4.2 2.8 9.2 3.6 9.3 |
mit | --- 4.9 3.2 6.1 2.2 4.4 |
ncl | --- 1.7 1.0 --- 0.9 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 9.6 4.4 9.0 3.0 8.3 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS05P30.snx gfz13347.snx |BAHR A ----| 1.1 -1.6 -23.7|
| | |
IGS05P31.snx igs05P1334.snx |SHAO A ----| -12.0 2.4 -4.4|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
40451M123 GODE A GODZ A GODE A GODE A GODE A GODE A GODE A GODE A
50103M108 TIDB A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50134M002 DARR A
50134M001 DARW A DARR A DARW A DARW A DARW A DARR A DARW A DARW A DARW A DARW A
DARW A
22306M002 IISC A 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 KR0G A
12351M001 ZECK A ZECK A ZECK A ZECK A ZECK A ZECK A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A KYW1 A ELEN A UPO1 A OUSD A MTJO A HORN A
CNCL A QUAR A KARA A MAC1 B MAR6 A IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A SG21 A OUSD A CNCL A KARA A MERS A BRAS A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S014 MAD2 A
13407S012 MADR A MAD2 A MADR A MADR A
MADR A
43001M002 THU2 A THU3 A THU3 A THU3 A
40451M123 GODZ A GODE A GODE A GODE A
GODE A
50103M113 TID2 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
20706M001 ELAT A ELAT A ELAT A
MISSING IERS DOMES NOS AT mit:
-----------------------------
MAC1 B BISH A
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