[IGSREPORT-15401] Wk 1439 IGS SINEX Combination
IGS SINEX
sinex at geod.nrcan.gc.ca
Wed Aug 22 14:21:39 PDT 2007
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IGS Electronic Report 22 Aug 14:21:49 PDT 2007 Message Number 15401
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Author: R. Ferland, M. Bourassa
===============================================================
Combined AC solution for GPS week 1439 - 07/08/05 to 07/08/11
===============================================================
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)
igs07P1439.snx Combined weekly solution.
igs07P1439.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS07P32.snx Cumulative Combined solution.
igs07P1439.sum This file.
igs07P1439.itr Residuals between the AC and the IGS05 for the RF stations.
igs07P1439.res Residuals between the AC and the Combined Weekly solution.
IGS07P32.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
IGS05 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS05.snx
3-4) The AC are compared to IGS05, 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 IGS05 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGS05 of the reference epoch
using a 14-parameters transformation and the 132 ITRF station positions
and velocities. The IGS05 is a realization of ITRF2005.
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 = IGS05.snx
igs = igs07P1439.snx
IGS = IGS07P32.snx
MIT = mit14397.snx
mit = mit1439g.snx
BuA = IERS Bulletin A
jpl mit are used to quality control the weekly combination.
gfz ngs excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
From the original solution:
cod SATA X Y Z
emr SATA X Y Z
gfz SATA X Y Z
MIT SATA X Y Z
sio SATA X Y Z
mit SATA X Y Z
After unconstraining:
jpl GMSD GOUG WTZZ
New stations in the cumulative solution IGS07P32.snx
HFLK A 2 YAKT A 4
4-1) Starting with GPS week 1400, the solutions are aligned to the
IGS05.snx realization of ITRF2005.
4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
is included in the erp files.
4-3) Starting with GPS week 1412, the accumulated ERP file has been
changed from "igs00p02.erp" to "igs00p03.erp". The main changes
are:
1) Correction of the pole position from IGb00 to IGS05 using the
transformation in:
http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00178.html
2) Marginal ERP's in GPS week 1161 were replaced by reprocessed
values.
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)|
---------------|-----|-----|---------------|---------------|---------------|
emr | 56 | 42 | 5.848 | 1.001 | 5.851 |
esa | 61 | 45 | 15.221 | 0.996 | 15.166 |
gfz | 183 | 100 | 13.270 | 1.000 | 13.266 |
MIT | 248 | 110 | 2.665 | 0.999 | 2.664 |
ngs | 197 | 107 | 34.110 | 1.002 | 34.161 |
sio | 167 | 97 | 2.897 | 1.000 | 2.896 |
jpl | 109 | 60 | 7.593 | 0.999 | 7.585 |
mit | 310 | 111 | 1.817 | 1.006 | 1.828 |
igs | 278 | 112 | 1.368 | 1.022 | 1.398 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to the IGS05 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
emr 42 | 1.3 0.3 0.1 | 2.9 2.9 10.0 |
esa 45 | 1.3 0.1 -0.4 | 3.5 2.5 10.3 |
gfz 100 | 1.0 0.2 0.1 | 2.5 2.4 8.0 |
MIT 110 | 1.3 0.2 0.0 | 2.5 2.2 8.1 |
ngs 107 | 1.3 -0.2 -0.3 | 3.5 2.8 8.5 |
sio 97 | 0.8 0.0 0.3 | 2.5 2.6 7.4 |
jpl 60 | 1.1 0.1 1.0 | 3.2 2.9 14.3 |
mit 110 | 0.9 0.1 0.0 | 2.4 2.1 7.5 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
emr 55 | 0.5 0.3 0.5 | 1.6 1.5 6.8 |
esa 61 | 0.6 0.0 -0.4 | 2.3 2.0 11.0 |
gfz 181 | 0.1 0.2 0.0 | 1.0 1.3 2.7 |
MIT 222 | 0.1 0.2 0.1 | 0.6 0.8 2.0 |
ngs 195 | -0.1 -0.3 -0.7 | 2.4 2.1 3.8 |
sio 163 | -0.3 -0.3 0.1 | 1.3 1.6 3.1 |
jpl 105 | 0.1 0.2 1.5 | 2.7 2.5 13.8 |
mit 273 | -0.1 0.0 -0.2 | 0.8 0.8 2.1 |
ITR 111 | -1.0 -0.1 -0.3 | 2.3 2.0 7.0 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
emr 55 | 1.6 0.1 1.0 | 2.4 2.9 9.5 |
esa 59 | 1.4 0.1 0.2 | 2.8 2.4 10.9 |
gfz 177 | 1.0 0.4 0.0 | 1.7 2.2 5.7 |
MIT 199 | 1.1 0.4 0.6 | 1.7 1.8 5.4 |
ngs 189 | 0.8 -0.1 -0.7 | 3.0 2.7 6.1 |
sio 159 | 0.6 -0.1 0.5 | 2.0 2.4 5.0 |
jpl 102 | 1.1 0.3 1.8 | 2.8 2.9 14.0 |
mit 249 | 0.8 0.2 -0.1 | 1.5 1.7 4.9 |
igs 243 | 0.9 0.2 0.1 | 1.5 1.7 4.8 |
ITR 128 | -0.3 0.0 -0.2 | 1.8 1.4 6.2 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS05.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) |
---------------|---------------------------------------------------------------|
emr | -0.014 0.015 -0.002 -3.1 -8.4 8.5 -0.79 |
esa | -0.027 -0.007 -0.013 -1.4 1.0 -16.4 -1.68 |
gfz | -0.004 -0.032 -0.003 1.2 0.2 1.9 -0.96 |
MIT | 0.008 0.007 -0.015 -6.6 1.1 -6.7 -0.56 |
ngs | 0.044 -0.006 -0.005 2.3 3.6 5.0 -1.53 |
sio | 0.036 0.012 0.020 -4.2 1.6 -1.3 -0.47 |
jpl | 0.155 -0.069 0.150 1.2 -3.5 17.5 -0.55 |
mit | -0.000 0.011 -0.013 -0.5 0.4 -0.7 -0.88 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.97 |
---------------|---------------------------------------------------------------|
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) |
---------------|---------------------------------------------------------------|
emr | 0.061 0.067 0.067 1.6 1.6 1.6 0.25 |
esa | 0.056 0.063 0.063 1.5 1.5 1.5 0.24 |
gfz | 0.040 0.042 0.045 1.1 1.1 1.1 0.17 |
MIT | 0.039 0.041 0.043 1.0 1.0 1.0 0.16 |
ngs | 0.039 0.041 0.043 1.1 1.0 1.0 0.16 |
sio | 0.040 0.043 0.045 1.1 1.1 1.1 0.17 |
jpl | 0.050 0.055 0.057 1.4 1.4 1.4 0.21 |
mit | 0.038 0.041 0.042 1.0 1.0 1.0 0.16 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.50 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -5.7 1.1 -3.3 | 2.7 2.8 5.1 |
---------------|---------------------------|---------------------------|
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 |
---------------|------------------------------------------------------------|
emr | --- 14.0 -1.8 64.4 -3.0 -0.4 |
esa | --- 28.8 -2.9 --- 1.8 --- |
gfz | --- -4.5 -3.2 14.7 -3.6 -4.7 |
MIT | --- 9.3 -2.4 34.1 -1.4 -8.3 |
ngs | --- -3.3 9.3 8.9 -4.5 9.1 |
sio | --- -6.3 -1.0 1.1 4.1 -0.5 |
jpl | --- -7.1 -3.7 15.3 0.5 -12.2 |
mit | --- -8.5 -2.8 1.5 0.8 -0.5 |
ITR | --- --- --- --- --- --- |
BuA | --- -4.3 2.1 -1.0 -4.3 -0.9 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
emr | --- 7.4 2.5 13.9 2.8 12.0 |
esa | --- 9.3 1.9 --- 2.6 --- |
gfz | --- 17.7 2.5 9.7 3.3 6.8 |
MIT | --- 3.1 3.4 14.5 3.6 25.5 |
ngs | --- 14.5 6.7 5.9 2.4 9.8 |
sio | --- 6.6 2.4 8.5 2.0 3.9 |
jpl | --- 22.2 2.4 18.6 1.6 19.0 |
mit | --- 5.4 2.2 11.7 2.2 4.3 |
ITR | --- --- --- --- --- --- |
BuA | --- 13.8 6.9 9.6 2.7 5.2 |
---------------|------------------------------------------------------------|
5-6) Satellite Antenna Offset Residuals weighted Average & STD :
=====================================================================
No Satellite phase center ...
5-7) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS07P31.snx gfz14397.snx |JAMA A 1| 8.3 14.7 -5.4|
| | |
IGS07P31.snx MIT14397.snx |GOUG A 1| 8.6 -20.9 -20.4|
| | |
IGS07P31.snx ngs14397.snx |JAMA A 1| 7.0 12.8 -1.5|
| | |
IGS07P31.snx jpl14397.snx |JAMA A 1| 7.5 16.2 -4.3|
| | |
IGS07P31.snx mit1439g.snx |BRFT A 1| 9.2 -1.6 8.2|
IGS07P31.snx mit1439g.snx |GOUG A 1| 8.6 -19.4 -20.9|
IGS07P31.snx mit1439g.snx |HNPT A 3| 0.1 -1.3 -24.3|
IGS07P31.snx mit1439g.snx |TIDB A 2| 3.6 3.2 12.4|
| | |
IGS07P31.snx igs07P1439.snx |BRFT A 1| 8.6 -2.0 7.8|
-----------------------------------------|------------|-----------------------|
5-8) Conflicts:
====================
IERS DOMES NO emr esa gfz jpl MIT ngs sio igs IGS
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
13407S012 MAD2 A MADR A MADR A MADR A MADR A MAD2 A MADR A MADR A
MADR A
13407S014 MAD2 A
22003M001 PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A
50103M108 TIDB A TIDB A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50107M004 YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
50134M001 DARW A DARW A DARR A DARW A DARW A DARW A DARW A DARW A
50134M002 DARR A
22306M002 IISC B IISC A IISC A IISC A IISC B IISC A IISC A IISC A
12313M001 IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKM A IRKT A
40405S031 GOLD A GOLD A GOL2 A GOLD A GOL2 A GOLD A GOLD A
GOLD A
43001M002 THU3 A THU2 A THU2 A THU3 A THU2 A THU2 A THU2 A
THU3 A THU3 A THU3 A THU3 A
43001M003 THU3 A
43005M002 KELY B KELY B KELY A KELY B KELY A KELY A KELY A
43401M001 BDOS A BDOS A BDOS A BDOS A
BDOS A BDOS A
20703S001 RAMO A RAMO A RAMO A RAMO A ELRO A ELRO A
RAMO A RAMO A
10422M001 KIR0 A KIR0 A KR0G A KR0G A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
IFRN A BRFT A HLFX A GODZ A MIA3 A NDBC A ELEN A WIS1 A LKHU A ADKS A
JCT1 A PLS1 A P066 A POTR A P473 A FTS1 A AIS1 A SAMO A TUVA A CNCL A
QUAR A KARA A CNMR A MOBS A GMSD A IRKM A SOLA A HALY A ELAT A RIGA A
VIS0 A MAR6 A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A CNCL A KARA A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ANG1 A AZCN A AZCO A KLPD A LASC A LEBA A FAAA A PALM A TELA A
IERS DOMES NO mit igs IGS
============= ====== ====== ======
13407S012 MAD2 A MADR A MADR A
MADR A
43401M001 BDOS A BDOS A BDOS A
BDOS A BDOS A
43001M002 THU2 A THU2 A THU2 A
THU3 A THU3 A
50107M004 YAR2 A YAR1 A YAR1 A
12313M001 IRKT A IRKM A IRKT A
20703S001 RAMO A ELRO A ELRO A
RAMO A RAMO A
10422M001 KIR0 A KR0G A KR0G A
MISSING IERS DOMES NOS AT mit:
-----------------------------
IFRN A KULU A GODZ A MIA3 A NDBC A WIS1 A LKHU A ADKS A JCT1 A PLS1 A
P066 A POTR A P473 A FTS1 A AIS1 A SAMO A TUVA A CNCL A QUAR A KARA A
IRKM A VIS0 A MAR6 A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ANG1 A AZCN A AZCO A KLPD A LASC A LEBA A FAAA A PALM A TELA A
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