[IGSREPORT-13553] Wk 1361 IGS SINEX Combination
Martin Bourassa
mbourass at nrcan.gc.ca
Thu Feb 23 19:06:21 PST 2006
******************************************************************************
IGS Electronic Report 23 Feb 19:06:28 PST 2006 Message Number 13553
******************************************************************************
Author: R. Ferland , M. Bourassa
===================================================================
Combined AC solution for GPS week 1361 - 06/02/05 to 06/02/11
===================================================================
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
CDDIS (cddis.gsfc.nasa.gov) and SOPAC (garner.ucsd.edu)
igs06P1361.snx Combined weekly solution.
igs06P1361.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS06P06.snx Cumulative Combined solution.
igs06P1361.sum This file.
igs06P1361.itr Residuals between the AC and the IGb00 for the RF stations.
igs06P1361.res Residuals between the AC and the Combined Weekly solution.
IGS06P06.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 = igs06P1361.snx
IGS = IGS06P06.snx
MIT = mit13617.snx
mit = mit1361g.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:
cod MANZ
mit MANZ
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 | 172 | 73 | 30.021 | 1.001 | 30.041 |
emr | 39 | 28 | 7.337 | 1.000 | 7.340 |
esa | 67 | 51 | 19.102 | 1.000 | 19.110 |
gfz | 184 | 77 | 4.800 | 1.001 | 4.804 |
jpl | 123 | 50 | 6.693 | 1.001 | 6.697 |
MIT | 140 | 66 | 2.804 | 1.001 | 2.806 |
ngs | 147 | 78 | 45.386 | 1.000 | 45.406 |
mit | 246 | 78 | 0.828 | 0.977 | 0.809 |
ncl | 154 | 77 | 1.954 | 0.886 | 1.730 |
igs | 239 | 80 | 1.402 | 0.999 | 1.401 |
---------------|-----|-----|---------------|---------------|---------------|
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 73 | 1.3 0.3 -1.3 | 4.3 4.1 14.9 |
emr 28 | -0.1 -0.0 1.2 | 5.5 3.1 15.4 |
esa 51 | -2.0 0.6 0.7 | 5.3 3.7 9.6 |
gfz 77 | -0.0 0.2 -0.2 | 3.9 3.6 13.0 |
jpl 50 | -0.4 0.2 0.1 | 4.1 4.0 14.5 |
MIT 65 | 0.8 0.3 0.5 | 4.5 3.5 12.1 |
ngs 78 | -0.5 0.4 -0.1 | 4.8 4.4 16.8 |
mit 76 | 0.6 0.2 0.1 | 3.6 3.5 12.9 |
ncl 77 | 0.3 0.2 0.4 | 3.5 3.2 10.5 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 169 | 0.2 -0.1 -1.7 | 1.4 1.5 5.1 |
emr 37 | -3.2 -0.8 -0.5 | 2.5 1.8 5.2 |
esa 64 | -3.2 0.1 -0.2 | 3.2 3.1 9.8 |
gfz 181 | -0.9 -0.1 -0.9 | 0.9 0.8 3.2 |
jpl 120 | -1.9 0.1 1.8 | 2.8 3.8 9.0 |
MIT 133 | 0.2 -0.1 -0.3 | 1.2 1.2 4.6 |
ngs 144 | -0.9 0.4 -0.0 | 3.4 3.7 8.8 |
mit 232 | 0.1 0.0 -0.0 | 0.4 0.4 2.8 |
ncl 153 | -0.4 -0.1 1.1 | 0.9 0.9 4.0 |
ITR 79 | -0.7 -0.2 -1.1 | 3.5 3.6 12.6 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 163 | 0.8 -0.0 -1.5 | 2.7 2.9 9.5 |
emr 37 | -1.9 -0.4 1.3 | 4.3 2.1 8.6 |
esa 65 | -2.7 0.0 -0.0 | 4.3 3.0 9.9 |
gfz 173 | -0.3 -0.1 -0.4 | 2.2 2.2 7.7 |
jpl 117 | -1.3 -0.2 2.5 | 3.4 3.8 10.7 |
MIT 128 | 0.7 -0.0 0.4 | 2.5 2.3 7.2 |
ngs 142 | -0.3 0.1 0.3 | 4.2 4.1 12.0 |
mit 211 | 0.5 0.0 0.2 | 2.0 1.9 7.2 |
ncl 148 | 0.1 -0.1 1.5 | 2.1 2.1 7.2 |
igs 218 | 0.4 0.1 0.3 | 1.9 2.0 6.8 |
ITR 86 | -0.5 0.0 -1.1 | 2.0 2.2 6.3 |
---------------|---------------------------|---------------------------|
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 | -0.022 -0.006 0.017 5.8 11.3 -7.2 3.73 |
emr | -0.003 -0.064 0.020 4.6 8.1 -8.8 4.58 |
esa | 0.001 -0.018 0.007 -0.7 5.6 1.0 2.16 |
gfz | 0.049 -0.027 -0.004 -2.0 1.5 -5.4 2.58 |
jpl | 0.176 -0.058 0.100 -0.9 6.5 -16.6 1.48 |
MIT | -0.030 -0.005 0.006 4.9 7.6 -1.6 3.83 |
ngs | 0.053 -0.064 -0.001 -2.6 2.7 -21.3 4.12 |
mit | -0.007 0.004 -0.015 -2.0 -0.7 -2.5 3.09 |
ncl | 0.033 -0.076 -0.004 -0.9 0.9 -5.3 2.51 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 3.12 |
---------------|---------------------------------------------------------------|
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 | 0.047 0.046 0.052 1.2 1.2 1.2 0.19 |
emr | 0.072 0.073 0.088 1.9 1.9 1.9 0.30 |
esa | 0.053 0.055 0.062 1.4 1.4 1.4 0.22 |
gfz | 0.046 0.045 0.051 1.2 1.2 1.2 0.18 |
jpl | 0.057 0.055 0.060 1.4 1.4 1.4 0.22 |
MIT | 0.049 0.048 0.054 1.2 1.2 1.2 0.20 |
ngs | 0.045 0.045 0.051 1.2 1.2 1.2 0.18 |
mit | 0.045 0.045 0.052 1.2 1.2 1.2 0.18 |
ncl | 0.046 0.045 0.051 1.2 1.2 1.2 0.18 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 1.14 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 3.9 8.1 -7.3 | 3.8 3.9 5.4 |
---------------|---------------------------|---------------------------|
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 | --- 2.5 -3.6 --- -2.6 --- |
emr | --- 3.8 -5.2 0.3 -2.9 -18.3 |
esa | --- -1.5 0.8 --- 5.1 --- |
gfz | --- -0.7 2.3 -1.8 5.2 0.8 |
jpl | --- -17.6 -2.8 -15.6 2.4 2.8 |
MIT | --- 7.6 -0.9 -0.2 -1.5 -1.3 |
ngs | --- -6.2 12.1 11.3 7.3 11.1 |
mit | --- 16.3 -0.5 0.8 -2.5 -1.2 |
ncl | --- 8.2 -0.3 --- 0.3 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 0.1 -3.0 3.0 25.9 1.1 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 5.6 1.3 --- 1.2 --- |
emr | --- 8.4 3.9 12.6 3.0 4.7 |
esa | --- 24.4 3.0 --- 1.8 --- |
gfz | --- 6.6 3.2 12.0 1.3 5.7 |
jpl | --- 15.6 2.9 15.4 1.8 11.3 |
MIT | --- 5.7 2.3 8.1 2.5 6.4 |
ngs | --- 24.5 8.4 6.8 3.5 23.6 |
mit | --- 8.6 4.0 13.1 2.0 8.4 |
ncl | --- 3.0 1.3 --- 1.5 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 26.4 7.6 23.1 5.2 9.1 |
---------------|------------------------------------------------------------|
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 gfz13617.snx |YELL A ----| 15.8 8.5 5.5|
| | |
IGS03P33_RS99.snx ncl1361g.snx |ALGO A ----| 12.3 4.8 18.5|
IGS03P33_RS99.snx ncl1361g.snx |YELL A ----| 14.0 7.4 8.3|
| | |
igs06P1360.snx mit1361g.snx |ALGO A ----| 10.3 2.8 6.3|
| | |
IGS06P05.snx jpl13617.snx |ASPA A ----| -7.1 7.3 -53.0|
| | |
IGS06P05.snx MIT13617.snx |ALGO A ----| 10.0 3.2 11.2|
| | |
IGS06P05.snx mit1361g.snx |NTUS A 2| 2.1 -10.7 2.6|
IGS06P05.snx mit1361g.snx |YELL A ----| 12.9 7.5 4.2|
| | |
IGS06P05.snx igs06P1361.snx |ALGO A ----| 11.3 4.7 14.5|
IGS06P05.snx igs06P1361.snx |NTUS A 2| 1.4 -10.9 5.8|
IGS06P05.snx igs06P1361.snx |YELL A ----| 12.7 7.6 4.3|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr esa gfz jpl ngs IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A
40451M123 GODE A GODZ A GODE A GODE A GODE A GODE A GODE A
50135M001 MAC1 B MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A
50103M108 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 DARW A DARR A DARW A DARW A DARW A
DARW A
22003M001 PIMO A PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A
30314M002 SUTH A SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A
22306M002 IISC A IISC B IISC A IISC A IISC B IISC A IISC A
43005M002 KELY B KELY B KELY B KELY B KELY B KELY A KELY A
10422M001 KIR0 A KIR0 A KR0G A KR0G A
20703S001 RAMO A RAMO A RAMO A RAMO A ELRO A RAMO A
RAMO A
14001M006 ZIMJ A ZIMJ A ZIMJ A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A ELEN A UPO1 A MTJO A CNCL A QUAR A KARA A IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
PALM A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
43005M002 KELY B KELY B KELY A KELY A
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
20703S001 RAMO A RAMO A ELRO A RAMO A
RAMO A
10422M001 KIR0 A KR0G A KR0G A
MISSING IERS DOMES NOS AT mit:
-----------------------------
KOD1 A
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