[IGSREPORT-12123] Wk 1303 IGS SINEX Combination
Remi Ferland
rferland at nrcan.gc.ca
Mon Jan 10 06:28:34 PST 2005
******************************************************************************
IGS Electronic Report 10 Jan 06:28:33 PST 2005 Message Number 12123
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1303 - 04/12/26 to 05/01/01
===================================================================
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
igs04P1303.snx Combined weekly solution.
igs04P1303.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS04P52.snx Cumulative Combined solution.
igs04P1303.sum This file.
igs04P1303.itr Residuals between the AC and the IGb00 for the RF stations.
igs04P1303.res Residuals between the AC and the Combined Weekly solution.
IGS04P52.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 = igs04P1303.snx
IGS = IGS04P52.snx
BuA = IERS Bulletin A
gfz ngs excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
After unconstraining:
jpl WUHN
mit BRST GUAO
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 | 76 | 30.363 | 1.039 | 31.536 |
emr | 49 | 36 | 6.111 | 1.251 | 7.647 |
MIT | 139 | 65 | 3.319 | 1.047 | 3.475 |
sio | 169 | 81 | 2.976 | 1.033 | 3.073 |
igs | 216 | 85 | 1.513 | 0.873 | 1.321 |
---------------|-----|-----|---------------|---------------|---------------|
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 75 | 0.2 0.2 0.4 | 3.2 4.0 12.4 |
emr 36 | -0.6 0.4 1.9 | 4.7 3.4 13.3 |
MIT 65 | 0.2 0.2 0.8 | 3.2 4.2 11.7 |
sio 81 | 0.4 0.4 -0.3 | 3.8 4.1 9.0 |
---------------|---------------------------|---------------------------|
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 -0.1 -0.6 | 1.2 1.1 4.3 |
emr 48 | -2.0 -0.1 0.0 | 2.1 1.0 7.9 |
MIT 125 | -0.2 -0.3 -0.8 | 1.2 1.3 3.8 |
sio 156 | -0.0 0.1 0.5 | 2.2 2.2 5.4 |
ITR 84 | -0.6 -0.2 -0.8 | 2.7 3.5 10.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 129 | 0.1 0.5 -0.1 | 3.0 3.3 9.2 |
emr 45 | -1.3 -0.5 2.2 | 4.2 4.2 11.0 |
MIT 108 | 0.3 0.0 -0.3 | 2.4 3.5 7.9 |
sio 142 | 1.0 0.4 0.0 | 3.9 4.5 7.8 |
igs 162 | 0.7 0.4 -0.0 | 2.5 3.5 6.8 |
ITR 91 | -0.4 0.0 -0.5 | 1.2 1.2 3.8 |
---------------|---------------------------|---------------------------|
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 | -0.036 0.045 0.001 13.7 11.7 4.2 3.00 |
emr | -0.003 -0.049 0.032 5.6 10.4 -9.5 4.16 |
MIT | 0.186 -0.064 0.005 8.0 10.6 36.1 3.81 |
sio | -0.078 -0.011 0.031 18.5 8.7 49.6 3.21 |
---------------|---------------------------------------------------------------|
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 | 0.046 0.047 0.051 1.2 1.2 1.2 0.19 |
emr | 0.062 0.065 0.077 1.7 1.7 1.7 0.26 |
MIT | 0.048 0.050 0.054 1.3 1.3 1.3 0.20 |
sio | 0.044 0.045 0.050 1.2 1.2 1.1 0.18 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 12.1 9.7 13.8 | 4.9 5.1 7.4 |
---------------|---------------------------|---------------------------|
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 | --- -0.8 -3.5 --- 0.6 --- |
emr | --- 16.9 -0.9 11.0 -3.9 13.5 |
MIT | --- -15.6 1.8 0.8 1.6 -1.8 |
sio | --- -4.1 0.5 0.7 6.4 0.6 |
ITR | --- --- --- --- --- --- |
BuA | --- -3.8 -3.4 -4.9 32.9 1.1 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 3.3 1.4 --- 2.7 --- |
emr | --- 8.8 3.8 8.5 2.6 9.1 |
MIT | --- 5.1 1.9 4.8 2.2 7.8 |
sio | --- 2.9 0.9 9.8 2.3 12.9 |
ITR | --- --- --- --- --- --- |
BuA | --- 12.0 5.4 12.9 7.4 15.6 |
---------------|------------------------------------------------------------|
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 cod13037.snx |GOUG A ----| 0.6 4.5 61.7|
| | |
IGS03P33_RS99.snx MIT13037.snx |MAC1 A ----| 19.7 5.9 7.7|
| | |
IGS04P51.snx cod13037.snx |YAKT A ----| 23.7 -25.3 -24.0|
| | |
IGS04P51.snx cod13037.snx |IISC A ----| -1.7 -20.2 -1.5|
IGS04P51.snx cod13037.snx |MAC1 A ----| 17.8 6.8 8.0|
| | |
IGS04P51.snx MIT13037.snx |IISC A ----| 0.2 -18.1 -4.7|
IGS04P51.snx MIT13037.snx |TVST A ----| -18.5 4.0 -38.7|
| | |
IGS04P51.snx sio13037.snx |CAGS A ----| -18.8 -20.1 -5.1|
IGS04P51.snx sio13037.snx |ELAT A ----| -3.7 -13.1 50.5|
IGS04P51.snx sio13037.snx |KIRU A ----| -12.6 -1.7 -53.3|
| | |
IGS04P51.snx igs04P1303.snx |MAC1 A ----| 19.7 9.1 7.9|
IGS04P51.snx igs04P1303.snx |USUD A ----| 13.6 1.7 1.4|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr sio IGS igs
============= ====== ====== ====== ====== ====== ======
43001M002 THU2 A THU3 A THU3 A THU3 A THU3 A
THU3 A THU2 A
40451M123 GODE A GODZ A GODE A GODE A GODE A
40405S038 GOL2 A
40405S031 GOLD A GOL2 A GOLD A GOLD A
50103M113 TID2 A
50103M108 TIDB A TID2 A TIDB A TIDB A
TIDB A
50134M001 DARW A DARR A DARW A DARW A DARW A
66010M001 DAV1 A DAVR A DAV1 A DAV1 A DAV1 A
10422M001 KIR0 A KR0G A
24201M001 ULAB A ULAB A ULAB A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A KYW1 A MCD1 A ARP3 A GUAX A UPO1 A OUSD A
MTJO A HORN A CNCL A QUAR A KARA A MAC1 B TVST A KAYT A MAR6 A IENG A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A SG21 A DOAR A OUSD A CNCL A KARA A MERS A CAVA A SFEL A VOLT A
BRAS A
IERS DOMES NO --- IGS IGS IGS IGS NRC MIT --- cod emr igs igs sio NRC IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
50134M001 DARR A DARW A DARW A DARW A DARW A DARW A DARR A DARW A DARW A DARW A DARW A DARW A DARW A
DARW A
66010M001 DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAVR A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
DAVR A
40451M123 GODE A GODE A GODE A GODE A GODE A GODE A GODZ A GODE A GODE A GODE A GODE A GODE A GODE A
GODZ A
40405S031 GOL2 A GOL2 A GOLD A GOL2 A GOLD A GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
GOLD A GOLD A GOLD A
12313M001 IRKM A IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A
IRKT A
10422M001 KIR0 A KR0G A KR0G A KIR0 A KR0G A KR0G A KR0G A KR0G A
KR0G A
13407S012 MAD2 A MADR A MADR A MADR A MADR A MADR A MAD2 A MADR A MADR A MADR A
MADR A MADR A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ATWC A CAVA A DOAR A HORN A JSLM A KATZ A KAYT A MERS A MIA3 A MTJO A
NETT A OLDL A PALM A PMON A PUR2 A QUAR A SAMP A SFEL A TALA A TELA A
VOLT A YAIG A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ARP3 A AZCN A BAY1 A BISH A BRAS A BRU1 A CCV3 A CLGO A CNCL A COT1 A
DNRC A ENG1 A FAI2 A GILB A GUAX A HBRK A HKLO A HVLK A IFRN A KARA A
KJUN A KULU A LASC A LAUG A LMNO A LUMC A MCD1 A OUSD A PLTC A PPT1 A
PRCO A SAV1 A SG21 A SPMX A STRL A TMGO A TVST A UPO1 A UPO1 A VCIO A
WLPS A WSMN A ATWC A CAVA A DOAR A HORN A JSLM A KATZ A KAYT A MERS A
MIA3 A MTJO A NETT A PALM A PMON A PUR2 A QUAR A SAMP A SFEL A TALA A
TELA A VOLT A YAIG A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
CLGO A UPO1 A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ARP3 A AZCN A BAY1 A BISH A BRAS A BRU1 A CCV3 A CLGO A CNCL A COT1 A
DNRC A ENG1 A FAI2 A GILB A GUAX A HBRK A HKLO A HVLK A IFRN A KARA A
KJUN A KULU A LASC A LAUG A LMNO A LUMC A MCD1 A OUSD A PLTC A PPT1 A
PRCO A SAV1 A SG21 A SPMX A STRL A TMGO A TVST A UPO1 A UPO1 A VCIO A
WLPS A WSMN A ATWC A CAVA A DOAR A HORN A JSLM A KATZ A KAYT A MERS A
MIA3 A MTJO A NETT A PALM A PMON A PUR2 A QUAR A SAMP A SFEL A TALA A
TELA A VOLT A YAIG A HLFX A PALM A PUR3 A MIA3 A KYW1 A MTJO A HORN A
QUAR A KAYT A MAR6 A IENG A DOAR A MERS A CAVA A SFEL A VOLT A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A KYW1 A MCD1 A ARP3 A GUAX A UPO1 A OUSD A
MTJO A HORN A CNCL A QUAR A KARA A MAC1 B TVST A KAYT A MAR6 A IENG A
MISSING IERS DOMES NOS AT igs:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A KYW1 A MCD1 A ARP3 A GUAX A UPO1 A OUSD A
MTJO A HORN A CNCL A QUAR A KARA A KAYT A MAR6 A IENG A KULU A SG21 A
DOAR A MERS A CAVA A SFEL A VOLT A BRAS A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A SG21 A DOAR A OUSD A CNCL A KARA A MERS A CAVA A SFEL A VOLT A
BRAS A
MISSING IERS DOMES NOS AT NRC:
-----------------------------
ARP3 A AZCN A BAY1 A BISH A BRAS A BRU1 A CCV3 A CLGO A CNCL A COT1 A
DNRC A ENG1 A FAI2 A GILB A GUAX A HBRK A HKLO A HVLK A IFRN A KARA A
KJUN A KULU A LASC A LAUG A LMNO A LUMC A MCD1 A OUSD A PLTC A PPT1 A
PRCO A SAV1 A SG21 A SPMX A STRL A TMGO A TVST A UPO1 A UPO1 A VCIO A
WLPS A WSMN A ATWC A CAVA A DOAR A HORN A JSLM A KATZ A KAYT A MERS A
MIA3 A MTJO A NETT A PALM A PMON A PUR2 A QUAR A SAMP A SFEL A TALA A
TELA A VOLT A YAIG A
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