[IGSREPORT-12426] Wk 1315 IGS SINEX Combination
Remi Ferland
rferland at nrcan.gc.ca
Thu Apr 7 23:50:06 PDT 2005
******************************************************************************
IGS Electronic Report 07 Apr 23:50:58 PDT 2005 Message Number 12426
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1315 - 05/03/20 to 05/03/26
===================================================================
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
igs05P1315.snx Combined weekly solution.
igs05P1315.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS05P12.snx Cumulative Combined solution.
igs05P1315.sum This file.
igs05P1315.itr Residuals between the AC and the IGb00 for the RF stations.
igs05P1315.res Residuals between the AC and the Combined Weekly solution.
IGS05P12.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 = igs05P1315.snx
IGS = IGS05P12.snx
MIT = mit13157.snx
mit = mit1315g.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 MCM4
jpl ASPA
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 | 165 | 68 | 24.507 | 1.001 | 24.539 |
emr | 47 | 36 | 4.364 | 1.001 | 4.369 |
esa | 68 | 48 | 8.585 | 1.005 | 8.624 |
gfz | 190 | 77 | 8.502 | 1.003 | 8.530 |
jpl | 116 | 48 | 5.116 | 1.001 | 5.122 |
MIT | 142 | 61 | 2.392 | 1.006 | 2.407 |
ngs | 143 | 75 | 25.909 | 1.001 | 25.935 |
mit | 261 | 76 | 0.990 | 0.987 | 0.977 |
ncl | 147 | 78 | 2.241 | 1.000 | 2.240 |
igs | 248 | 81 | 1.470 | 0.993 | 1.459 |
---------------|-----|-----|---------------|---------------|---------------|
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 68 | 0.9 0.2 -0.4 | 3.2 3.0 11.7 |
emr 36 | -0.3 0.0 1.4 | 2.7 2.9 11.6 |
esa 48 | -2.2 0.2 1.1 | 3.7 3.5 10.6 |
gfz 77 | 0.5 0.1 -0.7 | 3.1 3.2 10.5 |
jpl 48 | 0.1 0.1 -0.0 | 3.0 3.2 11.3 |
MIT 61 | 1.2 0.4 0.2 | 3.3 3.2 11.5 |
ngs 75 | -2.8 0.7 0.5 | 4.9 4.6 10.7 |
mit 76 | -0.1 0.2 0.3 | 3.0 3.2 10.6 |
ncl 78 | 0.5 0.1 0.1 | 3.0 2.8 9.1 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 164 | 0.3 0.0 -1.1 | 1.2 1.0 4.6 |
emr 47 | -0.8 0.1 1.0 | 1.7 1.9 5.4 |
esa 67 | -2.6 -0.6 2.1 | 3.1 2.4 12.0 |
gfz 187 | 0.1 -0.2 -0.5 | 1.0 1.2 3.5 |
jpl 115 | -1.0 0.2 0.8 | 1.7 2.3 7.4 |
MIT 131 | 1.1 0.2 0.1 | 1.4 1.5 3.9 |
ngs 142 | -3.6 0.6 1.7 | 4.0 3.4 7.7 |
mit 239 | -0.6 0.2 -0.7 | 1.0 0.7 2.9 |
ncl 146 | 0.0 -0.1 0.5 | 0.9 0.6 2.6 |
ITR 80 | -0.5 -0.1 -0.7 | 2.7 3.1 10.1 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 131 | 0.9 0.3 -1.4 | 2.1 2.3 8.4 |
emr 45 | -0.5 -0.1 0.4 | 1.7 2.1 8.7 |
esa 64 | -2.6 -0.5 0.6 | 3.3 3.0 11.5 |
gfz 162 | 0.6 -0.1 -1.0 | 2.0 2.3 7.0 |
jpl 92 | -0.3 0.2 0.9 | 2.0 2.9 8.7 |
MIT 113 | 1.4 0.3 -0.1 | 2.1 2.4 7.7 |
ngs 131 | -3.2 0.7 1.1 | 4.3 4.1 8.4 |
mit 177 | -0.1 0.3 -0.7 | 1.9 2.2 7.1 |
ncl 136 | 0.4 0.0 -0.1 | 1.8 1.9 6.1 |
igs 183 | 0.4 0.1 -0.3 | 1.7 2.0 6.1 |
ITR 86 | -0.4 0.0 -0.7 | 1.4 1.4 4.5 |
---------------|---------------------------|---------------------------|
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 | -0.031 0.009 -0.041 10.5 6.7 6.4 3.22 |
emr | -0.007 0.000 0.000 -0.8 -8.7 -4.6 4.37 |
esa | 0.003 0.001 0.001 1.2 5.1 -8.0 3.58 |
gfz | 0.032 -0.013 0.003 -1.8 0.6 -5.0 2.58 |
jpl | 0.134 -0.027 0.116 -1.7 2.6 -3.4 1.78 |
MIT | 0.142 -0.004 0.015 4.1 -1.1 10.6 3.57 |
ngs | -0.133 0.181 -0.038 6.9 2.2 58.1 3.93 |
mit | -0.020 0.018 -0.004 -1.5 -1.9 -1.3 3.40 |
ncl | -0.009 -0.047 -0.000 0.1 -0.3 -3.0 2.80 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 3.29 |
---------------|---------------------------------------------------------------|
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 | 0.049 0.047 0.054 1.3 1.3 1.2 0.20 |
emr | 0.066 0.063 0.075 1.7 1.7 1.7 0.26 |
esa | 0.056 0.057 0.064 1.5 1.5 1.5 0.23 |
gfz | 0.046 0.044 0.052 1.2 1.2 1.2 0.18 |
jpl | 0.057 0.055 0.064 1.5 1.5 1.5 0.23 |
MIT | 0.051 0.050 0.058 1.3 1.3 1.3 0.20 |
ngs | 0.046 0.045 0.054 1.2 1.2 1.2 0.19 |
mit | 0.046 0.045 0.053 1.2 1.2 1.2 0.19 |
ncl | 0.046 0.044 0.052 1.2 1.2 1.2 0.18 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.87 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 4.9 2.2 3.5 | 3.4 3.4 4.8 |
---------------|---------------------------|---------------------------|
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 | --- 18.1 -0.2 --- 0.4 --- |
emr | --- -4.0 3.2 8.3 -6.4 13.6 |
esa | --- -17.3 3.2 --- 4.0 --- |
gfz | --- -4.0 0.3 -6.2 2.3 3.5 |
jpl | --- 12.3 0.5 -18.9 0.6 2.6 |
MIT | --- 6.2 1.5 1.3 0.1 0.2 |
ngs | --- 6.5 -10.8 -7.0 14.5 -15.8 |
mit | --- 42.6 -3.6 1.0 3.2 -0.7 |
ncl | --- 15.7 -0.6 --- 3.4 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 10.2 1.4 -0.3 28.2 -0.8 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 3.5 1.2 --- 1.6 --- |
emr | --- 4.8 5.3 9.9 3.3 18.9 |
esa | --- 27.0 2.5 --- 5.5 --- |
gfz | --- 4.3 2.2 5.2 3.6 7.4 |
jpl | --- 8.8 2.6 12.1 2.6 12.2 |
MIT | --- 6.4 2.2 4.2 2.9 7.6 |
ngs | --- 10.9 6.2 40.4 4.7 33.4 |
mit | --- 7.2 2.4 8.0 1.1 4.8 |
ncl | --- 0.6 1.2 --- 1.2 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 17.4 3.2 7.0 5.8 10.3 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS03P33_RS99.snx ngs13157.snx |PIE1 A ----| -16.5 2.6 18.4|
| | |
IGS03P33_RS99.snx ngs13157.snx |MKEA A ----| -15.1 -1.0 19.0|
| | |
IGS03P33_RS99.snx mit1315g.snx |JAB1 A ----| -11.3 1.4 7.2|
| | |
IGS05P11.snx igs05P1315.snx |MAG0 A ----| 5.1 8.2 -9.7|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr esa gfz jpl ngs IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
43001M002 THU2 A THU3 A THU3 A THU3 A THU3 A THU3 A THU3 A THU3 A
THU3 A
40451M123 GODE A GODZ A GODE A GODE A GODE A GODE A GODE A
50103M108 TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A
TID1 A
TID2 A
50134M002 DARR A
50134M001 DARW A DARR A DARW A DARR A DARW A DARW A DARW A
DARW A
22306M002 IISC A IISC B IISC A IISC A IISC B IISC A IISC A
10422M001 KIR0 A KIR0 A KR0G A
22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A
41201S001 MANA A MANA A MANA A MANA A MANA A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A KYW1 A ARP3 A UPO1 A OUSD A MTJO A HORN A
CNCL A QUAR A KARA A MAC1 B KAYT A MAR6 A IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT ngs:
-----------------------------
CHUM A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
43001M002 THU2 A THU3 A THU3 A THU3 A
40451M123 GODZ A GODE A GODE A GODE A
GODE A
50134M002 DARR A
50134M001 DARW A DARR A DARW A DARW A
DARW A
10503S011 METS A METS A METS A METS A
MISSING IERS DOMES NOS AT mit:
-----------------------------
MAC1 B BISH A
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