[IGSREPORT-12024] Wk 1298 IGS SINEX Combination
Remi Ferland
rferland at nrcan.gc.ca
Thu Dec 9 12:46:51 PST 2004
******************************************************************************
IGS Electronic Report 09 Dec 12:47:23 PST 2004 Message Number 12024
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1298 - 04/11/21 to 04/11/27
===================================================================
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
igs04P1298.snx Combined weekly solution.
igs04P1298.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS04P47.snx Cumulative Combined solution.
igs04P1298.sum This file.
igs04P1298.itr Residuals between the AC and the IGb00 for the RF stations.
igs04P1298.res Residuals between the AC and the Combined Weekly solution.
IGS04P47.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 = igs04P1298.snx
IGS = IGS04P47.snx
MIT = mit12987.snx
mit = mit1298g.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).
Solutions with manual station deletion:
After unconstraining:
jpl ASPA DWH1 WUHN
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 | 165 | 75 | 26.752 | 0.998 | 26.695 |
emr | 52 | 40 | 4.247 | 0.999 | 4.242 |
esa | 73 | 57 | 9.930 | 0.999 | 9.918 |
gfz | 177 | 82 | 9.674 | 0.998 | 9.655 |
jpl | 114 | 54 | 5.803 | 0.998 | 5.793 |
MIT | 141 | 66 | 2.558 | 0.998 | 2.553 |
ngs | 129 | 73 | 28.355 | 0.917 | 26.007 |
sio | 173 | 83 | 2.629 | 0.998 | 2.624 |
mit | 266 | 84 | 1.062 | 0.998 | 1.060 |
ncl | 161 | 84 | 3.091 | 0.970 | 2.997 |
igs | 247 | 89 | 1.404 | 1.092 | 1.534 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 0.8 -0.0 -0.7 | 2.7 2.9 9.7 |
emr 40 | -1.6 -0.3 0.7 | 3.0 2.9 9.1 |
esa 57 | -1.6 -0.1 0.9 | 3.6 3.3 10.8 |
gfz 82 | -0.3 -0.1 -0.3 | 3.1 2.9 10.7 |
jpl 54 | -0.1 -0.2 0.0 | 3.4 3.5 11.2 |
MIT 66 | 0.6 0.1 0.5 | 3.0 2.4 9.2 |
ngs 73 | -1.5 -0.6 0.6 | 4.4 5.0 10.2 |
sio 83 | 0.5 0.2 -0.4 | 3.3 3.6 8.1 |
mit 84 | 0.6 -0.1 -0.1 | 2.7 2.6 7.7 |
ncl 84 | 0.7 -0.1 0.2 | 2.7 2.6 7.6 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 164 | 0.6 0.3 -0.7 | 1.2 1.2 4.5 |
emr 52 | -1.9 -0.2 0.1 | 1.6 1.5 6.4 |
esa 72 | -1.8 -0.3 2.8 | 2.6 3.0 13.1 |
gfz 174 | -0.7 -0.0 -0.1 | 1.3 1.6 4.8 |
jpl 114 | -1.0 -0.1 0.1 | 1.8 2.5 7.3 |
MIT 127 | 0.5 -0.0 -0.5 | 1.6 1.4 5.1 |
ngs 127 | -2.5 -0.8 0.5 | 2.9 4.1 6.9 |
sio 162 | 0.2 0.5 0.4 | 1.5 2.0 5.6 |
mit 235 | 0.4 -0.0 -0.3 | 0.6 0.6 2.5 |
ncl 160 | 0.2 -0.1 0.6 | 0.8 0.5 2.1 |
ITR 88 | -0.3 0.3 -0.4 | 2.7 2.6 8.1 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 131 | 1.0 0.2 -1.2 | 2.7 2.5 7.9 |
emr 48 | -1.8 -0.4 0.9 | 2.3 2.6 8.3 |
esa 70 | -1.7 -0.2 2.1 | 3.3 3.4 12.9 |
gfz 157 | -0.4 -0.0 -0.5 | 2.5 2.5 8.2 |
jpl 97 | -0.4 -0.2 -0.1 | 2.7 3.5 10.5 |
MIT 111 | 0.7 0.0 -0.5 | 2.4 2.2 6.5 |
ngs 116 | -1.8 -1.0 -0.3 | 3.7 4.6 9.7 |
sio 147 | 0.6 0.4 -0.4 | 2.8 3.3 7.4 |
mit 176 | 0.7 0.0 -0.6 | 2.2 2.1 6.0 |
ncl 145 | 0.6 -0.1 0.1 | 2.4 2.1 5.8 |
igs 184 | 0.3 -0.1 -0.4 | 2.1 2.2 5.9 |
ITR 93 | -0.3 0.0 -0.4 | 1.2 1.1 3.6 |
---------------|---------------------------|---------------------------|
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 0.005 -0.042 13.6 12.0 -17.6 3.16 |
emr | 0.008 -0.004 0.008 2.3 0.1 -33.6 4.10 |
esa | -0.020 0.011 0.020 2.7 7.8 -5.7 2.51 |
gfz | 0.042 -0.042 0.024 0.4 1.3 -6.1 2.37 |
jpl | 0.128 -0.035 0.121 2.8 7.8 0.2 1.53 |
MIT | 0.266 -0.084 0.024 3.0 13.3 -3.3 4.58 |
ngs | 0.043 0.030 -0.007 -6.9 3.1 -9.2 3.87 |
sio | -0.016 -0.064 0.011 19.1 6.6 43.2 3.00 |
mit | -0.006 -0.001 -0.011 -1.1 -0.1 -2.6 3.39 |
ncl | 0.027 -0.037 -0.004 1.0 1.3 -6.5 2.92 |
---------------|---------------------------------------------------------------|
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 0.052 1.2 1.2 1.2 0.19 |
emr | 0.061 0.062 0.071 1.6 1.6 1.6 0.25 |
esa | 0.050 0.053 0.058 1.3 1.3 1.3 0.21 |
gfz | 0.043 0.045 0.049 1.1 1.1 1.1 0.18 |
jpl | 0.053 0.055 0.058 1.4 1.4 1.4 0.22 |
MIT | 0.048 0.049 0.054 1.2 1.2 1.2 0.19 |
ngs | 0.045 0.048 0.051 1.2 1.2 1.2 0.19 |
sio | 0.043 0.045 0.049 1.2 1.1 1.1 0.18 |
mit | 0.042 0.044 0.049 1.1 1.1 1.1 0.18 |
ncl | 0.043 0.044 0.049 1.1 1.1 1.1 0.18 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 7.3 9.7 -8.4 | 3.2 3.4 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 | --- -6.0 0.6 --- -0.0 --- |
emr | --- 21.4 -5.0 20.8 -5.9 -27.9 |
esa | --- -20.4 13.4 --- -2.3 --- |
gfz | --- 1.9 2.3 -2.0 1.8 7.6 |
jpl | --- 1.2 1.1 -8.9 1.8 4.6 |
MIT | --- 2.2 0.9 0.6 2.4 -0.4 |
ngs | --- -18.9 -0.9 -0.9 -3.6 26.2 |
sio | --- -15.7 1.6 3.6 -2.9 -0.9 |
mit | --- 15.2 2.6 0.1 4.2 -0.2 |
ncl | --- 8.8 8.6 --- 0.4 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -6.9 -0.2 -1.5 28.1 -0.1 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 12.2 2.3 --- 1.4 --- |
emr | --- 22.0 7.9 13.4 3.9 20.5 |
esa | --- 41.9 1.1 --- 3.4 --- |
gfz | --- 11.0 2.1 12.2 3.1 8.7 |
jpl | --- 13.4 3.3 14.0 4.0 12.7 |
MIT | --- 9.7 1.4 8.4 1.8 10.9 |
ngs | --- 9.4 6.6 48.9 7.2 31.6 |
sio | --- 31.2 2.2 10.4 6.0 9.8 |
mit | --- 11.0 1.0 5.8 1.6 4.0 |
ncl | --- 2.9 0.5 --- 0.6 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 17.2 5.8 7.0 4.0 4.1 |
---------------|------------------------------------------------------------|
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 cod12987.snx |YAKT A ----| 16.9 -10.6 11.7|
| | |
IGS03P33_RS99.snx gfz12987.snx |YAKT A ----| 17.3 -11.1 -3.0|
| | |
IGS03P33_RS99.snx MIT12987.snx |MANA A ----| 13.2 6.2 9.0|
IGS03P33_RS99.snx MIT12987.snx |YAKT A ----| 26.9 -16.3 3.9|
| | |
IGS03P33_RS99.snx ngs12987.snx |YAKT A ----| 23.4 -29.5 9.2|
| | |
IGS03P33_RS99.snx mit1298g.snx |YAKT A ----| 18.7 -11.7 5.8|
| | |
IGS03P33_RS99.snx ncl1298g.snx |YAKT A ----| 20.1 -11.8 9.2|
| | |
IGS04P46.snx gfz12987.snx |RESO A ----| 12.8 -4.4 -2.3|
| | |
IGS04P46.snx MIT12987.snx |TVST A ----| -17.3 -0.8 -34.1|
| | |
IGS04P46.snx mit1298g.snx |USUD A ----| 12.5 0.8 3.2|
| | |
IGS04P46.snx igs04P1298.snx |USUD A ----| 11.9 0.8 1.1|
-----------------------------------------|------------|-----------------------|
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
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
40451M123 GODE A GODE A GODE A GODE A GODE A GODE A GODE A GODE A
GODZ A
40405S038 GOL2 A
40405S031 GOLD A GOLD A GOLD A GOLD A GOL2 A GOLD A GOLD A
50103M108 TIDB A TIDB 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 DARW A DARR 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 PIMO 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 IISC A
30314M002 SUTH A SUTH A SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
10422M001 KIR0 A KIR0 A KR0G 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 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 ngs:
-----------------------------
CHUM 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
============= ====== ====== ====== ======
43001M003 THU3 A
43001M002 THU2 A THU3 A THU3 A THU3 A
40451M123 GODE A GODE A GODE A GODE A
GODZ 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
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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