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[IGSREPORT-15919] Wk 1463 IGS SINEX Combination
******************************************************************************
IGS Electronic Report 06 Feb 13:40:01 PST 2008 Message Number 15919
******************************************************************************
Author: R. Ferland, M. Bourassa
===============================================================
Combined AC solution for GPS week 1463 - 08/01/20 to 08/01/26
===============================================================
1) Contacts:
============
e-mail: rferland @ 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)
igs08P1463.snx Combined weekly solution.
igs08P1463.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS08P04.snx Cumulative Combined solution.
igs08P1463.sum This file.
igs08P1463.itr Residuals between the AC and the IGS05 for the RF stations.
igs08P1463.res Residuals between the AC and the Combined Weekly solution.
IGS08P04.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 = igs08P1463.snx
IGS = IGS08P04.snx
MIT = mit14637.snx
mit = mit1463g.snx
BuA = IERS Bulletin A
mit 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:
sio GLSV
esa AREQ LHAZ
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)|
---------------|-----|-----|---------------|---------------|---------------|
cod | 168 | 87 | 26.115 | 1.000 | 26.113 |
emr | 63 | 45 | 4.819 | 1.000 | 4.819 |
esa | 102 | 74 | 6.095 | 1.000 | 6.095 |
gfz | 159 | 86 | 13.292 | 1.000 | 13.291 |
jpl | 116 | 65 | 6.109 | 1.000 | 6.109 |
MIT | 242 | 97 | 3.097 | 1.000 | 3.097 |
ngs | 184 | 98 | 47.386 | 1.002 | 47.486 |
sio | 153 | 86 | 3.061 | 1.000 | 3.061 |
mit | 305 | 94 | 2.073 | 0.950 | 1.969 |
igs | 270 | 99 | 1.484 | 0.999 | 1.483 |
---------------|-----|-----|---------------|---------------|---------------|
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 |
---------------|---------------------------|---------------------------|
cod 87 | -0.9 -0.1 -0.3 | 3.9 3.1 9.0 |
emr 45 | -1.3 -0.1 0.3 | 3.7 2.7 9.5 |
esa 74 | -0.5 0.0 0.1 | 4.4 3.0 12.2 |
gfz 86 | -0.6 -0.1 0.1 | 3.1 2.4 7.3 |
jpl 65 | 0.4 0.0 0.3 | 3.4 3.4 9.7 |
MIT 97 | 0.3 0.1 -0.2 | 3.0 2.5 8.2 |
ngs 98 | -0.4 0.1 0.0 | 3.8 2.8 7.6 |
sio 86 | 0.5 0.1 0.0 | 3.6 2.7 7.6 |
mit 94 | -0.4 0.0 0.2 | 3.2 2.4 6.8 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 162 | -0.4 -0.2 -0.6 | 1.7 1.2 3.1 |
emr 61 | -0.9 -0.1 0.6 | 2.0 1.3 4.8 |
esa 100 | 0.0 -0.4 -0.8 | 3.3 1.3 8.0 |
gfz 156 | -0.1 -0.3 -0.5 | 1.0 1.0 2.9 |
jpl 114 | 1.2 0.4 0.2 | 1.3 2.0 4.9 |
MIT 203 | 0.8 0.1 -0.1 | 1.3 1.1 2.8 |
ngs 179 | -0.4 -0.3 -0.3 | 2.0 2.4 4.2 |
sio 146 | 0.5 -0.1 -1.3 | 1.0 1.3 3.2 |
mit 263 | -0.2 -0.1 -0.4 | 0.5 0.5 2.0 |
ITR 98 | 0.3 -0.2 -0.1 | 3.0 2.2 7.5 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 153 | -0.7 -0.1 -0.4 | 2.6 2.3 5.3 |
emr 60 | -1.4 0.0 0.3 | 2.7 2.2 6.9 |
esa 97 | -0.6 -0.2 -0.4 | 3.2 2.4 9.9 |
gfz 152 | -0.6 -0.4 -0.2 | 2.0 1.9 4.9 |
jpl 105 | 0.8 0.4 0.8 | 2.1 2.8 7.4 |
MIT 183 | 0.2 0.1 0.0 | 1.9 2.2 4.8 |
ngs 174 | -0.7 -0.1 -0.1 | 2.6 3.1 5.9 |
sio 144 | 0.0 -0.2 -0.7 | 2.4 2.5 4.4 |
mit 230 | -0.6 -0.1 -0.3 | 1.8 1.8 4.2 |
igs 228 | -0.4 0.1 0.4 | 1.7 1.6 4.1 |
ITR 127 | -0.3 0.0 -0.1 | 2.1 1.8 7.1 |
---------------|---------------------------|---------------------------|
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) |
---------------|---------------------------------------------------------------|
cod | -0.016 0.009 -0.007 0.0 0.5 0.0 0.17 |
emr | -0.021 0.050 0.004 1.8 9.6 0.1 0.27 |
esa | 0.031 -0.062 0.062 6.5 9.3 -5.6 0.82 |
gfz | -0.006 -0.022 0.010 0.7 0.0 -0.2 0.06 |
jpl | 0.017 0.009 -0.018 -1.4 6.2 14.3 0.43 |
MIT | -0.013 0.012 -0.002 0.6 6.6 -8.7 0.03 |
ngs | -0.045 -0.077 0.027 4.0 -2.3 -3.3 -0.69 |
sio | 0.115 -0.001 0.000 -1.1 9.8 12.7 0.66 |
mit | -0.010 0.019 -0.002 -0.4 0.1 0.7 -0.00 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.18 |
---------------|---------------------------------------------------------------|
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 | 0.043 0.046 0.047 1.2 1.1 1.1 0.18 |
emr | 0.058 0.062 0.065 1.6 1.6 1.5 0.24 |
esa | 0.046 0.049 0.050 1.2 1.2 1.2 0.19 |
gfz | 0.045 0.045 0.048 1.2 1.2 1.1 0.18 |
jpl | 0.053 0.054 0.055 1.4 1.4 1.3 0.21 |
MIT | 0.042 0.043 0.045 1.1 1.1 1.1 0.17 |
ngs | 0.042 0.043 0.045 1.1 1.1 1.1 0.17 |
sio | 0.043 0.046 0.048 1.2 1.1 1.1 0.18 |
mit | 0.042 0.043 0.046 1.1 1.1 1.1 0.17 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.46 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 2.7 8.0 -4.7 | 2.5 2.4 3.6 |
---------------|---------------------------|---------------------------|
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 | --- --- --- --- --- --- |
emr | --- -6.9 -0.9 6.3 -0.7 -15.7 |
esa | --- --- --- --- --- --- |
gfz | --- 18.3 3.7 9.5 -1.2 0.8 |
jpl | --- --- 1.8 2.3 -3.5 3.9 |
MIT | --- -7.9 1.7 -11.9 1.8 8.8 |
ngs | --- --- --- --- --- --- |
sio | --- -3.7 -3.0 --- -1.7 --- |
mit | --- 3.5 -2.6 -1.1 -1.3 -4.1 |
ITR | --- --- --- --- --- --- |
BuA | --- 2.7 3.5 1.4 -3.7 -2.8 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 5.6 3.3 11.3 2.6 11.5 |
esa | --- --- --- --- --- --- |
gfz | --- 7.9 0.9 2.7 3.0 7.8 |
jpl | --- --- 1.8 13.6 1.6 9.7 |
MIT | --- 1.9 1.7 5.3 3.4 14.8 |
ngs | --- --- --- --- --- --- |
sio | --- 4.5 2.3 --- 3.1 --- |
mit | --- 4.5 2.2 9.4 3.2 11.1 |
ITR | --- --- --- --- --- --- |
BuA | --- 21.3 5.6 10.3 6.6 7.4 |
---------------|------------------------------------------------------------|
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)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF_IGS05.snx esa14637.snx |MANA A 2| 14.8 2.3 12.9|
| | |
ITRF_IGS05.snx gfz14637.snx |GUAM A 4| -10.6 2.7 0.4|
ITRF_IGS05.snx gfz14637.snx |HOLM A 1| 10.7 4.7 -2.9|
ITRF_IGS05.snx gfz14637.snx |WUHN A 4| 11.0 -8.3 15.5|
| | |
ITRF_IGS05.snx MIT14637.snx |HOLM A 1| 9.7 5.2 0.7|
ITRF_IGS05.snx MIT14637.snx |WUHN A 4| 12.6 -8.2 21.0|
| | |
ITRF_IGS05.snx sio14637.snx |TSKB A 2| -0.2 -1.5 -17.4|
| | |
ITRF_IGS05.snx mit1463g.snx |ISPA A 1| -1.8 1.0 -19.4|
ITRF_IGS05.snx mit1463g.snx |STJO A 4| 0.2 6.2 16.0|
ITRF_IGS05.snx mit1463g.snx |THU3 A 1| -1.6 1.5 -18.8|
ITRF_IGS05.snx mit1463g.snx |TSKB A 2| -2.0 -0.3 -14.1|
ITRF_IGS05.snx mit1463g.snx |WUHN A 4| 1.3 -10.0 17.3|
| | |
IGS08P03.snx cod14637.snx |NTUS A 4| -15.2 -8.3 -6.0|
| | |
IGS08P03.snx esa14637.snx |NTUS A 4| -17.8 -11.6 -6.9|
| | |
IGS08P03.snx gfz14637.snx |NTUS A 4| -14.4 -8.8 -5.1|
| | |
IGS08P03.snx mit1463g.snx |NTUS A 4| -13.3 -8.6 -3.1|
| | |
IGS08P03.snx igs08P1463.snx |ALRT A 1| -0.9 -5.3 0.2|
IGS08P03.snx igs08P1463.snx |MEDI A 2| 2.0 7.7 -5.9|
IGS08P03.snx igs08P1463.snx |NTUS A 4| -13.4 -10.4 -3.3|
IGS08P03.snx igs08P1463.snx |STJO A 4| 0.8 4.9 6.9|
IGS08P03.snx igs08P1463.snx |TWTF A 2| -4.1 -6.7 -10.7|
-----------------------------------------|------------|-----------------------|
5-8) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl MIT ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
50134M001 DARR A DARR A DARW A DARW A DARW A DARW A DARW A DARW A DARW A
50134M002 DARR A
66010M001 DAVR A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
92201M012 FAA1 A FAA1 A FAAA A
40451M123 GODZ A GODZ A GODE A GODE A GODE A GODE A GODE A GODE A
GODZ A
40405S031 GOLD A GOLD A GOLD A GOLD A GOLD A GOLD A GOL2 A GOLD A GOLD A
GOL2 A
12313M001 IRKT A IRKM A IRKT A IRKT A IRKT A IRKT A IRKM A
10422M001 KIR0 A KIR0 A KIR0 A KR0G A KR0G A
43001M002 THU2 A THU2 A THU3 A THU2 A THU2 A THU3 A THU2 A THU2 A THU3 A
THU3 A
43001M003 THU3 A
50107M004 YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
50103M108 TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A
TID1 A
13407S012 MADR A MADR A MADR A MADR A MAD2 A MADR A MADR A
MADR A
MISSING IERS DOMES NOS AT cod:
-----------------------------
JPLV A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
S041 A OHI3 A S031 A TUCU A S071 A S061 A MIA3 A NDBC A LKHU A ADKS A
SG21 A JCT1 A ISPA A USMX A P066 A POTR A P473 A S101 A S141 A SAMO A
S111 A CNCL A QUAR A KARA A PARK A S021 A S131 A HIL1 A XMIS A IRKM A
ADIS A NRIF A S121 A VAAS A LAMP A
MISSING IERS DOMES NOS AT sio:
-----------------------------
SG21 A CNCL A KARA A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ANG1 A AZCN A AZCO A CASC A ELAT A KLPD A LAMP A LASC A LEBA A
MISSING IERS DOMES NOS AT igs:
-----------------------------
HIL1 A LAMP A NRIF A TUCU A
IERS DOMES NO mit IGS igs
============= ====== ====== ======
13407S012 MADR A MADR A MADR A
MAD2 A
43001M002 THU2 A THU2 A THU3 A
THU3 A
40451M123 GODZ A GODE A GODE A
GODE A
92201M012 FAA1 A FAAA A
50107M004 YAR2 A YAR1 A YAR1 A
12313M001 IRKM A IRKT A IRKM A
IRKT A
10422M001 KIR0 A KR0G A KR0G A
MISSING IERS DOMES NOS AT mit:
-----------------------------
S041 A S031 A TUCU A S071 A S061 A MIA3 A NDBC A LKHU A ADKS A SG21 A
JCT1 A USMX A P066 A POTR A P473 A JPLV A S101 A S141 A SAMO A S111 A
CNCL A QUAR A KARA A S021 A S131 A HIL1 A ADIS A NRIF A S121 A VAAS A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ANG1 A AZCN A AZCO A CASC A ELAT A KLPD A LAMP A LASC A LEBA A
MISSING IERS DOMES NOS AT igs:
-----------------------------
HIL1 A LAMP A NRIF A TUCU A