[IGSREPORT-9346] Wk 1168 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Jun 13 19:24:35 PDT 2002
******************************************************************************
IGS Electronic Report 13 Jun 19:24:38 PDT 2002 Message Number 9346
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1168 - 02/05/26 to 02/06/01
===================================================================
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
igs02P1168.snx Combined weekly solution.
igs02P1168.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS02P22.snx Cumulative Combined solution.
igs02P1168.sum This file.
igs02P1168.itr Residuals between the AC and the IGS00 for the RF stations.
igs02P1168.res Residuals between the AC and the Combined Weekly solution.
IGS02P22.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 = igs02P1168.snx
IGS = IGS02P22.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:
jpl KELY
emr NRC1 NRC2
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 | 131 | 45 | 23.534 | 0.990 | 23.306 |
emr | 41 | 25 | 4.554 | 0.997 | 4.539 |
esa | 57 | 35 | 16.093 | 1.008 | 16.230 |
gfz | 83 | 36 | 7.681 | 0.998 | 7.669 |
jpl | 85 | 33 | 4.678 | 1.036 | 4.846 |
ngs | 76 | 48 | 22.219 | 0.993 | 22.056 |
sio | 132 | 44 | 2.316 | 0.998 | 2.311 |
mit | 174 | 47 | 3.570 | 1.169 | 4.172 |
ncl | 104 | 45 | 2.179 | 1.087 | 2.368 |
igs | 168 | 49 | 1.229 | 1.138 | 1.399 |
---------------|-----|-----|---------------|---------------|---------------|
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 44 | 1.3 0.3 0.2 | 3.0 3.0 11.5 |
emr 24 | -0.2 -0.1 0.3 | 4.2 2.2 8.9 |
esa 33 | 0.1 0.2 0.4 | 7.8 7.1 11.9 |
gfz 35 | 1.1 0.2 -0.7 | 2.8 3.7 8.0 |
jpl 31 | 1.4 0.2 0.3 | 2.7 2.8 8.9 |
ngs 47 | -0.7 0.8 -1.1 | 5.8 7.3 9.9 |
sio 41 | -0.1 0.7 -0.6 | 4.1 3.1 11.5 |
mit 46 | 1.0 0.3 0.1 | 3.6 3.1 8.1 |
ncl 44 | 1.1 0.2 0.0 | 2.0 2.5 5.8 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 130 | 0.7 0.1 0.5 | 1.6 1.4 7.4 |
emr 41 | -1.0 0.1 -0.9 | 1.8 1.6 6.4 |
esa 56 | -0.4 -0.8 -2.2 | 7.8 6.0 11.1 |
gfz 82 | 0.7 0.5 -0.1 | 2.1 1.9 6.0 |
jpl 85 | 1.0 0.4 0.9 | 1.8 1.4 7.4 |
ngs 75 | -1.7 0.7 -1.1 | 4.1 5.6 8.9 |
sio 128 | -0.5 0.0 0.4 | 2.3 2.5 10.7 |
mit 162 | 0.1 0.1 -0.7 | 0.8 0.7 4.2 |
ncl 103 | 0.5 -0.1 -0.2 | 0.8 0.6 3.3 |
ITR 48 | -1.2 -0.5 0.2 | 3.9 2.3 7.9 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 126 | 1.0 0.4 0.1 | 2.2 2.2 10.8 |
emr 41 | -0.3 -0.4 -1.7 | 3.4 2.2 10.7 |
esa 55 | -0.1 -0.6 -2.8 | 7.9 7.2 13.0 |
gfz 72 | 1.1 0.5 -0.1 | 2.8 3.3 8.4 |
jpl 76 | 1.7 0.0 -0.4 | 2.7 2.9 10.6 |
ngs 74 | -1.0 0.9 -1.6 | 5.0 6.8 11.4 |
sio 123 | -0.1 0.5 0.8 | 3.3 3.6 12.2 |
mit 142 | 0.7 0.4 -0.5 | 2.6 2.8 8.9 |
ncl 102 | 1.0 -0.1 -0.1 | 2.0 2.1 8.0 |
igs 147 | 0.5 0.2 -0.1 | 2.3 2.4 7.1 |
ITR 54 | -0.1 -0.2 0.0 | 0.8 0.9 1.8 |
---------------|---------------------------|---------------------------|
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 | -0.002 0.021 -0.053 9.4 10.9 1.8 1.69 |
emr | 0.006 -0.029 -0.019 2.6 -1.9 -14.0 1.02 |
esa | 0.095 0.026 -0.001 -26.1 14.7 -8.6 1.60 |
gfz | -0.002 -0.059 0.026 -0.1 1.4 -2.1 0.74 |
jpl | 0.024 -0.003 -0.046 -7.5 1.7 -6.3 0.75 |
ngs | 0.202 -0.164 -0.021 0.5 6.8 -62.2 1.07 |
sio | -0.069 0.070 -0.038 7.7 2.7 33.3 0.92 |
mit | 0.021 0.023 -0.012 -0.0 -0.0 -1.1 1.48 |
ncl | -0.016 -0.034 -0.032 0.5 -0.3 -4.0 1.17 |
---------------|---------------------------------------------------------------|
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 | 0.060 0.059 0.066 1.5 1.5 1.5 0.24 |
emr | 0.082 0.079 0.088 2.1 2.1 2.1 0.32 |
esa | 0.073 0.070 0.075 1.8 1.9 1.8 0.29 |
gfz | 0.067 0.066 0.075 1.7 1.7 1.7 0.27 |
jpl | 0.071 0.069 0.079 1.8 1.8 1.8 0.28 |
ngs | 0.058 0.057 0.064 1.5 1.5 1.5 0.23 |
sio | 0.063 0.060 0.068 1.6 1.6 1.6 0.25 |
mit | 0.058 0.057 0.065 1.5 1.5 1.5 0.23 |
ncl | 0.060 0.058 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 | 4.6 4.9 -3.8 | 1.8 1.7 4.5 |
---------------|---------------------------|---------------------------|
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 | --- -7.8 -5.0 --- -3.7 --- |
emr | --- -3.2 -1.3 -.6 -2.9 8.0 |
esa | --- 75.9 10.4 --- -33.8 --- |
gfz | --- -25.5 1.8 -7.3 15.8 -4.2 |
jpl | --- 27.8 .0 7.2 -3.2 13.5 |
ngs | --- -40.4 33.6 52.8 -18.6 -18.7 |
sio | --- 1.1 -6.3 -2.5 6.4 -9.8 |
mit | --- -21.1 -.8 -4.3 -3.5 -5.2 |
ncl | --- -2.8 2.0 --- .5 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -9.8 1.0 -5.6 26.4 -4.2 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 16.3 1.6 --- 2.5 --- |
emr | --- 20.4 1.2 9.7 1.8 8.8 |
esa | --- 363.9 19.7 --- 6.2 --- |
gfz | --- 21.4 2.8 12.6 2.5 7.0 |
jpl | --- 22.0 2.9 5.8 1.9 5.9 |
ngs | --- 17.5 11.6 65.4 14.8 48.9 |
sio | --- 14.8 2.7 9.8 2.5 5.3 |
mit | --- 16.8 1.8 8.8 1.1 5.3 |
ncl | --- 1.8 1.0 --- 292.7 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 22.5 2.8 10.1 2.8 4.7 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS01P37_RS54.snx esa11687.snx |CHAT A ----| 3.6 -12.4 -80.8|
IGS01P37_RS54.snx esa11687.snx |MCM4 A ----| 11.9 -0.7 -58.6|
| | |
IGS01P37_RS54.snx gfz11687.snx |GUAM A ----| 23.4 -6.5 14.5|
| | |
IGS01P37_RS54.snx jpl11687.snx |GUAM A ----| 18.9 -5.3 7.1|
| | |
IGS01P37_RS54.snx ncl1168g.snx |GUAM A ----| 20.1 -4.7 1.9|
| | |
cod11687.snx esa11687.snx |PIMO A ----| -11.2 1.7 -112.6|
| | |
emr11687.snx esa11687.snx |PIMO A ----| -14.8 2.8 -91.3|
| | |
emr11687.snx ngs11687.snx |SEY1 A ----| -3.4 -20.5 55.5|
| | |
esa11687.snx gfz11687.snx |PIMO A ----| 23.2 -1.7 113.5|
| | |
esa11687.snx jpl11687.snx |PIMO A ----| 14.9 -5.5 105.2|
| | |
esa11687.snx ngs11687.snx |SEY1 A ----| 3.0 0.3 78.8|
| | |
esa11687.snx sio11687.snx |PIMO A ----| 17.6 -4.7 132.3|
| | |
esa11687.snx mit1168g.snx |PIMO A ----| 15.2 -3.2 105.4|
| | |
esa11687.snx ncl1168g.snx |PIMO A ----| 17.8 -3.6 100.8|
| | |
jpl11687.snx sio11687.snx |SANT A ----| 1.8 9.1 56.4|
| | |
esa11687.snx sio11687.snx |IRKT A ----| 1.5 -4.0 52.5|
| | |
IGS02P21.snx cod11687.snx |TRO1 A ----| 2.5 -11.8 0.9|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
50107M004 YAR2 A YAR1 A YAR1 A
30314M002 SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A SUTH A
97301M211 KOU1 B KOU1 A
KOU1 B
22306M002 IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
42005M001 GALA A GALA A GALA B GALA A GALA A GALA B GALA A GALA A GALA A
13407S012 MADR A MADR A MAD2 A MADR A MAD2 A MADR A MADR A
40405S031 GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A NRC2 A
50103M108 TIDB A TIDB A TID2 A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
TIDB A
22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT sio:
-----------------------------
CAVA A SFEL A VOLT A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S012 MADR A MADR A MADR A MADR A
MAD2 A
31303M001 MAS1 A
31303M002 MAS1 A MAS1 A MAS1 A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
40405S031 GOLD A GOLD A GOLD A
GOL2 A
50103M108 TIDB A TID2 A TIDB A TIDB A
TID2 A TIDB A
50107M004 YAR2 A YAR1 A YAR1 A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
--
More information about the IGSREPORT
mailing list