[IGSREPORT-10471] Wk 1227 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Jul 31 15:49:47 PDT 2003
******************************************************************************
IGS Electronic Report 31 Jul 15:49:50 PDT 2003 Message Number 10471
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1227 - 03/07/13 to 03/07/19
===================================================================
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
igs03P1227.snx Combined weekly solution.
igs03P1227.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS03P29.snx Cumulative Combined solution.
igs03P1227.sum This file.
igs03P1227.itr Residuals between the AC and the IGS00 for the RF stations.
igs03P1227.res Residuals between the AC and the Combined Weekly solution.
IGS03P29.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
IGS00 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS01P37_RS54.SNX.Z
3-4) The AC are compared to IGS00, 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 IGS00 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGS00 of the reference epoch
using a 14-parameters transformation and the 54 ITRF station positions
and velocities. The IGS00 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 = IGS01P37_RS54.SNX
igs = igs03P1227.snx
IGS = IGS03P29.snx
BuA = IERS Bulletin A
mit ncl are used to quality control the weekly combination.
gfz excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
After unconstraining:
cod METZ
esa RIOG SANT
ngs KOKB LPGS
4-1) Starting with GPS week 1143, the solutions are aligned to the
IGS01P37_RS54.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 | 166 | 41 | 24.314 | 1.000 | 24.314 |
emr | 45 | 25 | 4.935 | 1.000 | 4.935 |
esa | 56 | 37 | 12.564 | 1.000 | 12.564 |
gfz | 174 | 44 | 7.394 | 1.000 | 7.394 |
jpl | 109 | 31 | 4.795 | 1.000 | 4.795 |
ngs | 74 | 45 | 26.767 | 1.000 | 26.767 |
sio | 142 | 45 | 1.698 | 1.000 | 1.698 |
mit | 244 | 44 | 1.731 | 1.060 | 1.835 |
ncl | 140 | 46 | 1.712 | 1.000 | 1.712 |
igs | 215 | 45 | 1.280 | 1.000 | 1.280 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to the IGS00 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 39 | 0.9 0.3 0.1 | 3.0 3.7 12.2 |
emr 24 | 0.3 0.4 0.5 | 3.3 3.7 8.8 |
esa 36 | 1.0 0.1 0.2 | 5.4 5.0 9.4 |
gfz 43 | 1.2 0.4 -0.5 | 3.2 3.8 8.1 |
jpl 29 | 0.8 0.2 -0.2 | 3.3 2.7 9.4 |
ngs 42 | -3.2 0.6 -0.6 | 4.9 5.6 14.2 |
sio 44 | 1.0 0.4 -0.1 | 3.4 3.2 6.0 |
mit 43 | 0.8 0.4 0.2 | 3.2 3.2 6.4 |
ncl 45 | 0.4 0.3 0.3 | 3.2 3.2 6.6 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 160 | 0.5 0.2 -0.9 | 1.3 1.9 7.1 |
emr 43 | 0.3 0.5 -1.9 | 2.1 2.3 6.4 |
esa 54 | -1.0 0.2 -0.8 | 5.5 4.7 6.9 |
gfz 168 | 0.3 0.2 -0.6 | 1.3 1.7 4.5 |
jpl 108 | 0.3 -0.2 0.0 | 1.5 1.4 6.5 |
ngs 72 | -3.8 -0.0 0.2 | 3.3 5.3 14.1 |
sio 135 | 0.5 0.3 -0.2 | 1.6 2.2 4.6 |
mit 208 | 0.1 -0.1 0.1 | 1.2 0.9 2.3 |
ncl 136 | -0.4 0.0 0.0 | 1.0 0.8 3.5 |
ITR 44 | -0.6 -0.7 0.4 | 3.0 3.0 6.6 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 131 | 0.9 0.3 -2.0 | 2.2 2.3 10.6 |
emr 44 | 1.0 1.0 -1.1 | 2.8 3.7 9.0 |
esa 54 | -0.3 0.4 -0.1 | 6.1 5.0 8.7 |
gfz 142 | 0.6 0.4 -1.2 | 2.6 2.5 7.6 |
jpl 84 | 0.8 0.0 -0.6 | 2.5 2.3 9.8 |
ngs 70 | -3.1 -0.2 0.9 | 4.0 4.9 14.6 |
sio 126 | 0.7 0.4 -1.1 | 2.7 2.9 5.9 |
mit 155 | 0.5 0.1 -1.0 | 2.6 2.0 6.5 |
ncl 127 | -0.0 0.1 -0.3 | 2.2 1.9 6.5 |
igs 157 | 0.2 0.2 -0.9 | 1.9 1.6 6.3 |
ITR 54 | -0.6 -0.7 0.2 | 3.2 2.4 4.3 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS01P37_RS54.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 | 0.008 -0.003 -0.010 2.3 7.4 3.6 1.72 |
emr | -0.008 -0.071 -0.011 -1.7 7.5 8.6 2.65 |
esa | 0.183 -0.034 -0.017 -1.5 15.6 9.7 0.09 |
gfz | 0.028 -0.034 0.053 -2.2 1.6 -0.7 0.86 |
jpl | 0.016 -0.006 0.038 -5.3 0.1 14.0 0.41 |
ngs | 0.031 -0.019 -0.120 -3.1 8.6 -15.6 0.18 |
sio | -0.020 -0.015 -0.069 5.7 1.3 27.1 1.42 |
mit | 0.017 0.005 0.002 -1.3 0.0 -1.8 1.28 |
ncl | -0.016 -0.029 -0.031 -0.5 -0.0 -1.7 1.09 |
---------------|---------------------------------------------------------------|
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 | 0.063 0.066 0.069 1.6 1.6 1.6 0.25 |
emr | 0.082 0.077 0.090 2.0 2.0 2.0 0.32 |
esa | 0.068 0.073 0.074 1.8 1.8 1.8 0.28 |
gfz | 0.059 0.061 0.068 1.6 1.6 1.6 0.24 |
jpl | 0.075 0.073 0.085 1.9 1.9 1.9 0.30 |
ngs | 0.062 0.063 0.071 1.6 1.6 1.6 0.25 |
sio | 0.058 0.060 0.068 1.5 1.5 1.5 0.24 |
mit | 0.059 0.061 0.069 1.6 1.6 1.6 0.24 |
ncl | 0.058 0.060 0.067 1.5 1.5 1.5 0.24 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 1.0 5.9 4.2 | 2.2 1.9 3.7 |
---------------|---------------------------|---------------------------|
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 | --- 6.3 -0.4 --- -3.8 --- |
emr | --- 7.3 4.4 6.2 -1.7 10.8 |
esa | --- 2.7 -13.6 --- -23.7 --- |
gfz | --- -33.2 -2.4 -1.7 -0.4 -9.9 |
jpl | --- 22.7 5.6 -15.2 -1.4 21.1 |
ngs | --- 36.2 12.4 22.0 -6.7 9.8 |
sio | --- 16.2 -4.4 -0.0 4.8 -11.3 |
mit | --- 30.6 -6.6 1.0 6.6 -3.6 |
ncl | --- 12.5 -2.0 --- 0.2 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 9.6 -7.6 1.4 23.3 -6.2 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 8.3 1.0 --- 1.6 --- |
emr | --- 13.3 3.7 7.7 2.4 16.3 |
esa | --- 8.9 3.4 --- 4.9 --- |
gfz | --- 14.1 2.3 6.5 3.0 5.8 |
jpl | --- 13.6 1.3 8.4 4.4 6.1 |
ngs | --- 19.8 8.7 28.8 4.7 25.7 |
sio | --- 8.7 1.1 6.1 1.6 6.0 |
mit | --- 11.6 1.3 12.4 3.3 3.8 |
ncl | --- 7.0 2.2 --- 1.3 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 22.1 5.4 10.6 3.6 7.7 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
cod12277.snx jpl12277.snx |SUNM A ----| -2.3 5.5 -57.4|
| | |
cod12277.snx ngs12277.snx |GUAM A 2| -1.4 2.7 57.5|
cod12277.snx ngs12277.snx |RIOG A ----| 6.7 5.8 50.5|
| | |
emr12277.snx ngs12277.snx |POL2 A ----| -8.1 1.2 51.3|
| | |
jpl12277.snx ngs12277.snx |SANT A ----| 3.3 3.7 50.7|
| | |
igs03P1226.snx gfz12277.snx |OHI2 A ----| 3.9 4.0 -52.3|
| | |
igs03P1226.snx mit1227g.snx |OHI2 A ----| 6.1 4.6 -49.1|
| | |
igs03P1226.snx ncl1227g.snx |OHI2 A ----| 5.1 3.6 -56.5|
| | |
IGS03P28.snx esa12277.snx |BOGT A 2| 18.7 -6.9 -3.6|
| | |
IGS03P28.snx gfz12277.snx |OBET A ----| -1.6 3.3 161.3|
| | |
IGS03P28.snx gfz12277.snx |MIZU A ----| -6.6 15.6 -6.8|
| | |
IGS03P28.snx jpl12277.snx |OHI2 A ----| 1.1 2.8 -95.8|
| | |
IGS03P28.snx ngs12277.snx |GOUG A ----| 0.2 9.3 50.7|
IGS03P28.snx ngs12277.snx |OHI2 A ----| 6.1 -2.1 -56.6|
| | |
IGS03P28.snx sio12277.snx |OHI2 A ----| -5.1 -2.9 -67.5|
| | |
IGS03P28.snx mit1227g.snx |OBET A ----| -1.3 2.6 160.5|
IGS03P28.snx mit1227g.snx |SUNM A ----| 0.0 -65.2 -163.3|
| | |
IGS03P28.snx igs03P1227.snx |LHAS A ----| 6.7 -4.1 -2.2|
IGS03P28.snx igs03P1227.snx |NRC1 A ----| 5.3 6.8 3.2|
IGS03P28.snx igs03P1227.snx |TRO1 A ----| 2.1 -6.8 -3.4|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
66010M001 DAVR A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
22306M002 IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
13407S012 MADR A MADR A MAD2 A MAD2 A MADR A MADR A
10402M004 OS0G A ONSA A ONSA A ONSA A ONSA A ONSA A ONSA A ONSA A
30314M002 SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
43001M002 THU2 A THU3 A THU3 A THU3 A THU3 A THU2 A
THU3 A
50103M108 TIDB A TIDB A TIDB A TIDB A TID1 A TID2 A TIDB A TIDB A TIDB A
TID1 A TID2 A
TID2 A
50107M004 YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
40400M007 JPLM A JPLM A JPLM A JPLM A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
CAVA A SFEL A VOLT A BRAS A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S012 MADR A MADR A MADR A
MAD2 A
43001M002 THU2 A THU3 A THU2 A
THU3 A THU3 A
40405S031 GOLD A GOLD A GOLD A GOLD A
GOL2 A
50103M108 TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50107M004 YAR2 A YAR2 A YAR1 A YAR1 A
66010M001 DAVR A DAV1 A DAV1 A DAV1 A
DAV1 A
14106M003 POTS A POTS A POTS A POTS A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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