[IGSREPORT-11863] Wk 1291 IGS SINEX Combination
Remi Ferland
rferland at nrcan.gc.ca
Thu Oct 21 06:18:09 PDT 2004
******************************************************************************
IGS Electronic Report 21 Oct 06:19:17 PDT 2004 Message Number 11863
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1291 - 04/10/03 to 04/10/09
===================================================================
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
igs04P1291.snx Combined weekly solution.
igs04P1291.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS04P40.snx Cumulative Combined solution.
igs04P1291.sum This file.
igs04P1291.itr Residuals between the AC and the IGb00 for the RF stations.
igs04P1291.res Residuals between the AC and the Combined Weekly solution.
IGS04P40.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 = igs04P1291.snx
IGS = IGS04P40.snx
MIT = mit12917.snx
mit = mit1291g.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).
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 | 157 | 76 | 23.436 | 1.001 | 23.463 |
emr | 44 | 36 | 6.268 | 1.000 | 6.271 |
esa | 66 | 53 | 10.451 | 1.001 | 10.461 |
gfz | 174 | 84 | 9.096 | 1.001 | 9.103 |
jpl | 111 | 53 | 5.289 | 1.001 | 5.292 |
MIT | 144 | 72 | 2.717 | 1.001 | 2.720 |
ngs | 76 | 75 | 25.303 | 1.000 | 25.311 |
sio | 171 | 85 | 2.388 | 1.001 | 2.390 |
mit | 263 | 83 | 1.266 | 0.958 | 1.213 |
ncl | 151 | 85 | 2.767 | 1.001 | 2.771 |
igs | 238 | 87 | 1.404 | 1.002 | 1.407 |
---------------|-----|-----|---------------|---------------|---------------|
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 76 | 1.0 0.1 -0.4 | 2.7 2.6 8.0 |
emr 36 | -0.8 0.1 0.8 | 4.5 4.8 7.8 |
esa 53 | 0.8 0.2 0.7 | 4.1 3.5 10.0 |
gfz 84 | -0.3 0.1 0.0 | 2.6 2.6 8.8 |
jpl 53 | 1.1 0.2 0.3 | 3.1 3.4 10.0 |
MIT 72 | 0.9 0.1 0.1 | 2.8 2.8 8.3 |
ngs 75 | 0.1 0.6 -0.3 | 4.4 6.0 8.7 |
sio 85 | 0.8 0.3 -0.6 | 3.4 3.1 7.2 |
mit 83 | 0.6 0.1 0.1 | 2.7 2.4 6.9 |
ncl 85 | 0.7 0.1 -0.0 | 2.5 2.3 6.7 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 154 | 0.4 0.0 -0.6 | 1.0 0.9 3.8 |
emr 43 | -1.2 0.1 1.3 | 3.1 3.5 6.0 |
esa 63 | 0.3 0.3 1.5 | 3.1 2.3 10.9 |
gfz 171 | -1.0 -0.0 0.2 | 1.1 1.0 4.1 |
jpl 110 | 0.6 0.5 1.2 | 1.5 2.0 7.8 |
MIT 130 | 0.7 0.1 -1.0 | 1.0 1.4 4.6 |
ngs 75 | -0.4 0.7 -0.2 | 3.1 5.0 6.8 |
sio 159 | 0.6 0.2 -0.4 | 1.7 2.2 4.9 |
mit 232 | 0.1 0.1 -0.5 | 0.4 0.4 2.6 |
ncl 149 | 0.1 -0.1 0.2 | 0.7 0.5 2.1 |
ITR 86 | -0.4 -0.0 -0.2 | 2.5 2.3 6.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 128 | 0.7 0.0 -0.6 | 2.2 2.0 6.4 |
emr 41 | -1.3 -0.0 0.6 | 3.7 4.4 6.7 |
esa 63 | 0.5 0.3 1.2 | 4.0 2.9 11.0 |
gfz 157 | -0.7 -0.0 0.1 | 2.1 1.8 6.7 |
jpl 90 | 0.8 0.2 1.4 | 2.4 2.5 8.9 |
MIT 115 | 0.8 0.0 -1.2 | 2.1 2.3 6.7 |
ngs 76 | -0.3 0.5 -0.7 | 3.8 5.7 8.0 |
sio 146 | 0.7 0.2 -0.9 | 2.6 2.9 6.3 |
mit 174 | 0.4 0.2 -0.6 | 2.0 1.8 5.4 |
ncl 143 | 0.4 -0.1 -0.1 | 2.0 1.7 5.4 |
igs 177 | 0.2 0.0 -0.3 | 1.8 1.6 5.0 |
ITR 92 | -0.4 -0.0 -0.3 | 1.0 1.0 3.1 |
---------------|---------------------------|---------------------------|
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 | -0.005 0.036 -0.060 14.9 9.8 12.5 2.51 |
emr | -0.056 -0.017 -0.114 3.8 5.1 -8.2 2.29 |
esa | -0.029 -0.022 0.012 -0.1 13.1 -4.8 2.33 |
gfz | 0.042 -0.021 0.011 -0.2 1.0 -3.8 1.94 |
jpl | 0.116 -0.048 0.081 -0.0 2.3 0.8 1.34 |
MIT | 0.145 0.016 -0.019 -3.1 3.3 -5.8 4.52 |
ngs | -0.063 0.019 0.010 5.3 -0.2 19.2 3.36 |
sio | -0.077 -0.060 0.027 14.8 1.9 32.8 2.91 |
mit | -0.012 0.006 -0.009 -0.9 -1.1 -1.6 2.89 |
ncl | 0.024 -0.055 0.003 1.0 0.2 -3.5 2.65 |
---------------|---------------------------------------------------------------|
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 | 0.045 0.047 0.051 1.2 1.2 1.2 0.18 |
emr | 0.063 0.067 0.072 1.7 1.7 1.7 0.26 |
esa | 0.053 0.055 0.059 1.4 1.4 1.4 0.22 |
gfz | 0.043 0.044 0.049 1.1 1.1 1.1 0.18 |
jpl | 0.053 0.055 0.059 1.4 1.4 1.4 0.22 |
MIT | 0.046 0.048 0.051 1.2 1.2 1.2 0.19 |
ngs | 0.045 0.046 0.051 1.2 1.2 1.2 0.18 |
sio | 0.043 0.044 0.048 1.1 1.1 1.1 0.17 |
mit | 0.043 0.045 0.049 1.1 1.1 1.1 0.18 |
ncl | 0.043 0.044 0.048 1.1 1.1 1.1 0.17 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 4.7 5.4 2.6 | 3.0 3.1 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 | --- 0.5 -0.8 --- -5.0 --- |
emr | --- -19.2 -1.5 13.5 -3.2 -16.0 |
esa | --- -37.1 8.1 --- 5.9 --- |
gfz | --- 6.1 0.5 19.7 1.9 -2.8 |
jpl | --- -2.7 0.7 1.2 -3.8 2.0 |
MIT | --- -11.2 5.1 0.1 1.8 0.5 |
ngs | --- 6.8 -4.9 --- 22.5 --- |
sio | --- -6.6 2.2 7.3 -0.6 -0.5 |
mit | --- 32.3 3.1 -0.2 2.4 0.2 |
ncl | --- 16.6 6.7 --- 0.3 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -0.9 1.4 1.4 23.7 2.1 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 2.2 0.7 --- 0.7 --- |
emr | --- 6.4 4.3 11.3 3.0 14.4 |
esa | --- 30.8 1.6 --- 2.4 --- |
gfz | --- 2.6 1.2 4.2 2.0 9.7 |
jpl | --- 11.9 1.2 10.2 2.3 13.8 |
MIT | --- 5.2 2.8 5.5 1.7 5.0 |
ngs | --- 13.8 2.6 --- 4.8 --- |
sio | --- 5.9 2.4 6.1 2.3 5.3 |
mit | --- 5.6 2.8 5.8 1.1 4.1 |
ncl | --- 1.9 0.8 --- 0.8 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 11.6 3.4 9.7 4.2 6.9 |
---------------|------------------------------------------------------------|
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 gfz12917.snx |IISC A ----| -6.9 -9.8 -3.2|
| | |
IGS03P33_RS99.snx mit1291g.snx |IISC A ----| -2.1 -10.9 -6.4|
| | |
IGS03P33_RS99.snx ncl1291g.snx |IISC A ----| -3.1 -10.4 -4.6|
| | |
cod12917.snx jpl12917.snx |ASPA A ----| -1.7 -1.1 -51.9|
| | |
IGS04P39.snx gfz12917.snx |ZWEN A 2| 4.4 8.8 23.3|
| | |
IGS04P39.snx MIT12917.snx |QUAR A ----| 1.2 1.3 83.3|
IGS04P39.snx MIT12917.snx |TVST A ----| -18.3 0.2 -21.0|
| | |
IGS04P39.snx sio12917.snx |USUD A ----| 13.9 3.8 2.0|
| | |
IGS04P39.snx mit1291g.snx |QUAR A ----| -0.2 2.6 84.6|
| | |
IGS04P39.snx igs04P1291.snx |IISC A ----| -3.1 -8.8 -2.0|
IGS04P39.snx igs04P1291.snx |USUD A ----| 10.3 2.0 1.9|
IGS04P39.snx igs04P1291.snx |ZWEN A 2| 4.3 7.7 20.0|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
43001M002 THU2 A THU3 A THU3 A THU3 A THU3 A THU3 A THU2 A THU3 A THU3 A
THU3 A THU3 A
40451M123 GODE A GODZ A GODE A GODE A GODE A GODE A GODE A GODE A
40405S038 GOL2 A
40405S031 GOLD A GOLD A GOLD A GOLD A GOL2 A GOLD A GOLD A
50103M113 TID2 A
50103M108 TIDB A TID2 A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50134M002 DARR A
50134M001 DARW A DARR A DARW A DARR A DARW A DARW A DARW A DARW A
DARW A
22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A
50107M004 YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
66010M001 DAV1 A DAVR A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
22306M002 IISC A IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A
10422M001 KIR0 A KIR0 A KR0G A
10023M001 LROC A LROC A LROC A LROC A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A KYW1 A ELEN A ARP3 A GUAX A UPO1 A OUSD A
MTJO A HORN A CNCL A QUAR A TVST A KAYT A SAMP A MAR6 A IENG A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A SG21 A DOAR A OUSD A CNCL A MERS A CAVA A SFEL A VOLT A BRAS A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
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
10422M001 KIR0 A KR0G A
30314M002 SUTH A SUTH A SUTH A SUTH A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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