[IGSREPORT-12821] Wk 1332 IGS SINEX Combination
Remi Ferland
rferland at nrcan.gc.ca
Thu Aug 4 14:22:36 PDT 2005
******************************************************************************
IGS Electronic Report 04 Aug 14:22:44 PDT 2005 Message Number 12821
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1332 - 05/07/17 to 05/07/23
===================================================================
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 cddisa.gsfc.nasa.gov and at garner.ucsd.edu
igs05P1332.snx Combined weekly solution.
igs05P1332.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS05P29.snx Cumulative Combined solution.
igs05P1332.sum This file.
igs05P1332.itr Residuals between the AC and the IGb00 for the RF stations.
igs05P1332.res Residuals between the AC and the Combined Weekly solution.
IGS05P29.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 = igs05P1332.snx
IGS = IGS05P29.snx
MIT = mit13327.snx
mit = mit1332g.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).
New stations in the cumulative solution IGS05P29.snx
TITZ A ----
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 | 169 | 71 | 21.986 | 1.003 | 22.050 |
emr | 44 | 32 | 5.108 | 1.002 | 5.116 |
esa | 73 | 55 | 7.565 | 1.002 | 7.578 |
gfz | 184 | 77 | 5.821 | 1.003 | 5.838 |
MIT | 143 | 63 | 2.600 | 1.004 | 2.610 |
jpl | 129 | 52 | 5.659 | 1.002 | 5.668 |
ngs | 144 | 77 | 39.686 | 1.001 | 39.743 |
sio | 168 | 76 | 2.232 | 1.004 | 2.241 |
mit | 269 | 77 | 1.154 | 1.004 | 1.159 |
ncl | 164 | 79 | 2.623 | 1.021 | 2.679 |
igs | 265 | 81 | 1.648 | 1.031 | 1.699 |
---------------|-----|-----|---------------|---------------|---------------|
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 71 | 1.2 0.2 -1.1 | 3.0 3.2 11.8 |
emr 32 | -0.3 0.3 0.4 | 3.6 3.7 13.5 |
esa 55 | 0.2 0.2 0.3 | 3.5 4.2 13.0 |
gfz 77 | 0.7 0.1 -0.7 | 3.5 3.6 12.0 |
MIT 63 | -0.0 0.3 0.7 | 3.7 3.6 10.9 |
jpl 52 | -1.0 0.3 -0.1 | 3.7 3.9 13.0 |
ngs 77 | -0.8 0.8 0.3 | 4.3 5.4 13.8 |
sio 76 | 1.0 0.1 0.7 | 3.7 4.0 12.0 |
mit 77 | 0.7 0.2 0.2 | 3.3 3.5 11.5 |
ncl 79 | 0.6 0.2 0.2 | 3.3 3.4 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 | 0.5 0.3 -0.9 | 1.4 1.1 4.2 |
emr 44 | -1.2 -0.2 -0.4 | 1.9 1.8 6.3 |
esa 72 | -0.3 -0.7 -0.6 | 2.1 3.1 12.8 |
gfz 182 | 0.2 -0.2 -0.3 | 1.0 1.0 4.5 |
MIT 135 | -0.4 0.0 0.1 | 1.4 1.9 3.4 |
jpl 129 | -1.6 0.4 0.6 | 1.4 1.7 8.0 |
ngs 143 | -0.9 0.6 0.4 | 2.7 3.8 7.7 |
sio 160 | 0.7 -0.0 -0.6 | 1.4 1.5 3.9 |
mit 245 | 0.3 0.0 -0.3 | 0.4 0.5 2.7 |
ncl 163 | 0.1 -0.1 0.1 | 0.7 0.5 2.0 |
ITR 80 | -0.6 -0.4 -1.5 | 3.2 3.5 10.6 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 160 | 0.9 0.3 -1.5 | 2.4 1.8 7.9 |
emr 43 | -0.5 0.1 1.1 | 2.9 2.4 8.7 |
esa 70 | -0.1 -0.5 0.1 | 2.8 3.3 12.7 |
gfz 173 | 0.5 -0.1 -0.2 | 2.5 2.1 8.3 |
MIT 129 | -0.0 -0.1 0.4 | 2.7 2.6 6.9 |
jpl 116 | -0.9 0.5 0.5 | 3.0 2.8 10.6 |
ngs 138 | -0.6 0.8 0.4 | 3.5 4.6 10.3 |
sio 152 | 0.8 0.0 -0.6 | 2.7 2.9 7.7 |
mit 223 | 0.6 -0.0 -0.4 | 2.3 2.1 7.1 |
ncl 157 | 0.5 0.0 0.4 | 2.5 1.9 6.6 |
igs 239 | 0.3 0.1 -0.1 | 2.4 2.0 6.5 |
ITR 86 | -0.5 -0.0 -0.8 | 1.6 1.7 5.3 |
---------------|---------------------------|---------------------------|
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 | 0.007 0.008 0.006 5.0 9.7 3.2 2.56 |
emr | 0.000 -0.029 -0.012 -9.0 -2.9 -9.8 4.00 |
esa | -0.001 -0.014 0.007 -6.3 9.8 2.7 3.06 |
gfz | 0.036 -0.026 -0.006 -1.6 1.6 -3.5 2.00 |
MIT | 0.057 0.070 -0.009 -9.5 2.2 -8.2 3.33 |
jpl | 0.123 -0.045 0.098 -6.2 2.5 -13.9 1.28 |
ngs | 0.048 -0.049 -0.009 -4.6 3.4 -22.7 3.49 |
sio | 0.010 0.031 -0.042 -2.0 -0.4 -0.3 3.03 |
mit | -0.021 0.018 -0.014 -2.4 -1.0 -1.8 2.85 |
ncl | 0.013 -0.036 0.012 -1.9 0.6 -5.0 2.44 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 2.84 |
---------------|---------------------------------------------------------------|
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 0.047 0.053 1.2 1.2 1.2 0.19 |
emr | 0.070 0.070 0.076 1.8 1.8 1.8 0.28 |
esa | 0.052 0.053 0.059 1.4 1.4 1.4 0.21 |
gfz | 0.045 0.044 0.051 1.2 1.2 1.2 0.18 |
MIT | 0.049 0.049 0.056 1.3 1.3 1.3 0.20 |
jpl | 0.054 0.053 0.061 1.4 1.4 1.4 0.22 |
ngs | 0.045 0.045 0.052 1.2 1.2 1.2 0.18 |
sio | 0.046 0.045 0.052 1.2 1.2 1.2 0.18 |
mit | 0.045 0.045 0.052 1.2 1.2 1.2 0.18 |
ncl | 0.045 0.044 0.051 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 | -2.5 3.1 -3.9 | 3.5 3.5 4.6 |
---------------|---------------------------|---------------------------|
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 | --- 2.6 0.1 --- -5.2 --- |
emr | --- 5.2 3.4 1.1 -0.4 31.1 |
esa | --- -46.6 3.5 --- 4.7 --- |
gfz | --- -15.0 1.2 13.4 -1.9 7.1 |
MIT | --- 22.1 1.3 1.4 -0.9 -1.8 |
jpl | --- 8.9 1.7 -2.2 0.2 -1.3 |
ngs | --- -17.6 0.5 17.0 0.1 0.8 |
sio | --- 16.4 -0.2 -0.8 0.4 -1.5 |
mit | --- 60.6 -0.6 0.9 2.9 -0.9 |
ncl | --- 13.4 -2.3 --- 0.1 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 8.8 -3.2 -0.5 32.4 0.0 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 12.9 1.6 --- 0.6 --- |
emr | --- 4.6 3.2 14.3 3.1 14.9 |
esa | --- 7.3 2.6 --- 1.7 --- |
gfz | --- 3.7 1.9 11.0 1.8 10.0 |
MIT | --- 10.3 2.4 5.5 2.4 7.1 |
jpl | --- 10.7 1.9 20.4 2.0 22.0 |
ngs | --- 14.6 4.6 24.4 5.1 18.6 |
sio | --- 10.5 1.6 5.8 3.2 5.4 |
mit | --- 9.9 2.1 5.8 2.1 4.7 |
ncl | --- 3.1 0.7 --- 0.6 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 21.5 5.0 7.0 3.2 6.5 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
cod13327.snx jpl13327.snx |ASPA A ----| -4.2 0.4 -54.8|
| | |
cod13327.snx ngs13327.snx |WUHN A 2| 12.8 7.2 -54.8|
| | |
MIT13327.snx ncl1332g.snx |TNML A ----| 2.4 2.3 -211.2|
| | |
jpl13327.snx ncl1332g.snx |TNML A ----| 1.9 0.2 -206.9|
| | |
sio13327.snx ncl1332g.snx |TNML A ----| -0.3 4.0 -209.1|
| | |
mit1332g.snx ncl1332g.snx |TNML A ----| 0.6 3.8 -212.5|
| | |
IGS05P28.snx gfz13327.snx |CNMR A ----| -18.8 36.5 6.7|
| | |
IGS05P28.snx ngs13327.snx |CNMR A ----| -14.2 49.7 -8.4|
| | |
IGS05P28.snx mit1332g.snx |CNMR A ----| -17.2 39.8 -4.9|
| | |
IGS05P28.snx ncl1332g.snx |CNMR A ----| -16.9 39.4 0.6|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
43001M003 THU3 A
43001M002 THU3 A THU3 A THU3 A THU3 A THU3 A THU3 A THU2 A THU3 A THU3 A
THU3 A
40451M123 GODE A GODZ A GODE A GODE A GODE A GODE A GODE A GODE A
50103M108 TIDB A TIDB A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50134M001 DARW A DARR A DARW A DARW A DARW A DARR A DARW A DARW A DARW A DARW A
22306M002 IISC A IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
10422M001 KIR0 A KIR0 A KR0G A KR0G A
12351M001 ZECK A ZECK A ZECK A ZECK A ZECK A ZECK A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A KYW1 A ELEN A UPO1 A OUSD A MTJO A HORN A CNCL A
QUAR A KARA A MAC1 B SAMP A MAR6 A IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT ngs:
-----------------------------
CHUM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A SG21 A OUSD A CNCL A KARA A SAMP A MERS A BRAS A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S014 MAD2 A
13407S012 MADR A MAD2 A MADR A MADR A
MADR A
43001M002 THU2 A THU3 A THU3 A THU3 A
40451M123 GODZ A GODE A GODE A GODE A
GODE A
50103M108 TIDB A TID2 A TIDB A TIDB A
TIDB A
50134M002 DARR A
50134M001 DARW A DARR A DARW A DARW A
DARW A
12356M001 GLSV A GLSV A GLSV A GLSV A
MISSING IERS DOMES NOS AT mit:
-----------------------------
MAC1 B BISH A
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