[IGSREPORT-9102] Wk 1155 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Mar 14 13:20:44 PST 2002
******************************************************************************
IGS Electronic Report 14 Mar 13:20:48 PST 2002 Message Number 9102
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1155 - 02/02/24 to 02/03/02
===================================================================
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
igs02P1155.snx Combined weekly solution.
igs02P1155.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS02P09.snx Cumulative Combined solution.
igs02P1155.sum This file.
igs02P1155.itr Residuals between the AC and the IGS00 for the RF stations.
igs02P1155.res Residuals between the AC and the Combined Weekly solution.
IGS02P09.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 = igs02P1155.snx
IGS = IGS02P09.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 | 126 | 47 | 27.046 | 1.000 | 27.055 |
emr | 46 | 31 | 3.795 | 1.000 | 3.796 |
esa | 59 | 39 | 11.635 | 1.000 | 11.636 |
gfz | 82 | 38 | 9.487 | 1.001 | 9.493 |
jpl | 79 | 34 | 4.025 | 1.000 | 4.026 |
ngs | 71 | 49 | 21.916 | 1.000 | 21.918 |
sio | 130 | 48 | 2.489 | 1.000 | 2.489 |
mit | 162 | 49 | 3.865 | 1.000 | 3.864 |
ncl | 107 | 49 | 2.619 | 1.000 | 2.619 |
igs | 161 | 51 | 1.452 | 1.000 | 1.451 |
---------------|-----|-----|---------------|---------------|---------------|
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 46 | -0.7 0.6 -1.3 | 2.9 3.3 10.6 |
emr 30 | -0.1 0.4 0.0 | 3.1 5.3 8.0 |
esa 37 | -5.2 1.0 -0.5 | 7.4 5.9 13.5 |
gfz 37 | -0.3 0.3 -1.4 | 2.8 3.3 8.7 |
jpl 33 | -2.0 0.0 -1.4 | 2.1 2.2 9.5 |
ngs 46 | -3.3 -0.5 0.3 | 3.7 6.4 9.6 |
sio 45 | -1.5 0.6 0.4 | 2.8 3.6 10.9 |
mit 48 | -0.4 0.4 -0.5 | 2.7 2.7 6.3 |
ncl 48 | -0.2 0.3 -0.4 | 2.4 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 124 | 0.2 0.9 -0.8 | 1.4 1.9 6.9 |
emr 46 | 1.1 0.6 -2.2 | 2.5 4.7 8.0 |
esa 59 | -4.5 0.7 1.1 | 5.3 4.6 10.6 |
gfz 81 | 0.4 0.1 -1.1 | 2.3 2.3 6.2 |
jpl 79 | -0.9 0.1 -0.2 | 1.7 1.7 9.5 |
ngs 70 | -2.1 -1.4 -0.8 | 3.1 6.6 9.3 |
sio 126 | 0.2 0.5 2.1 | 2.7 2.4 9.4 |
mit 152 | 0.2 0.3 -0.5 | 1.0 0.8 3.2 |
ncl 106 | 0.5 0.2 0.1 | 1.2 0.7 3.1 |
ITR 50 | 0.5 -0.6 0.0 | 2.9 2.4 5.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 123 | -0.9 1.3 -0.1 | 3.0 3.6 9.9 |
emr 46 | 0.2 0.3 -1.2 | 3.6 5.5 8.9 |
esa 58 | -5.3 1.2 -0.2 | 6.6 5.4 12.1 |
gfz 76 | -0.4 0.0 -0.3 | 3.4 3.4 9.0 |
jpl 69 | -1.7 0.1 -0.6 | 2.7 2.8 10.7 |
ngs 69 | -2.9 -1.2 -0.8 | 4.0 7.3 10.5 |
sio 123 | -0.8 1.2 2.9 | 3.6 4.0 11.9 |
mit 137 | -0.7 0.7 0.3 | 2.5 2.9 6.8 |
ncl 105 | -0.3 0.3 0.5 | 2.5 2.7 7.4 |
igs 146 | -0.9 0.3 0.4 | 2.6 2.8 6.8 |
ITR 54 | -0.2 -0.1 0.0 | 0.5 0.6 1.3 |
---------------|---------------------------|---------------------------|
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 | 0.002 -0.002 -0.030 9.5 3.9 -23.9 1.15 |
emr | 0.001 0.002 -0.060 6.9 -14.4 6.8 1.36 |
esa | 0.068 0.021 -0.049 -9.1 16.5 -15.4 1.69 |
gfz | 0.031 -0.104 -0.128 -0.8 1.1 -1.7 0.84 |
jpl | 0.001 0.002 0.006 11.0 4.7 -10.3 0.89 |
ngs | -0.287 0.422 -0.092 -20.3 -13.9 61.8 1.22 |
sio | -0.015 -0.009 -0.124 3.8 -4.0 58.0 0.97 |
mit | 0.001 -0.012 -0.009 0.1 -0.1 0.7 0.99 |
ncl | -0.024 -0.018 -0.045 0.3 -0.4 -1.6 0.88 |
---------------|---------------------------------------------------------------|
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 | 0.058 0.059 0.066 1.5 1.5 1.5 0.23 |
emr | 0.073 0.070 0.083 1.9 1.9 1.8 0.29 |
esa | 0.068 0.067 0.073 1.8 1.7 1.7 0.27 |
gfz | 0.064 0.065 0.074 1.7 1.7 1.7 0.26 |
jpl | 0.069 0.066 0.077 1.8 1.7 1.7 0.27 |
ngs | 0.060 0.060 0.066 1.6 1.6 1.5 0.24 |
sio | 0.060 0.059 0.066 1.5 1.5 1.5 0.24 |
mit | 0.057 0.057 0.065 1.5 1.5 1.5 0.23 |
ncl | 0.057 0.057 0.064 1.5 1.5 1.5 0.23 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -2.3 -4.1 3.3 | 2.8 2.6 6.7 |
---------------|---------------------------|---------------------------|
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 | --- 3.6 -.5 --- -5.6 --- |
emr | --- 19.8 -9.1 -14.8 18.7 10.4 |
esa | --- 13.1 -9.2 1.0 -7.9 1.5 |
gfz | --- -4.4 4.7 -11.3 11.6 2.0 |
jpl | --- 3.7 -3.1 -18.0 .1 5.5 |
ngs | --- 15.9 -10.5 -53.1 24.2 -1.1 |
sio | --- -16.1 7.1 -2.5 7.2 .2 |
mit | --- 12.6 -1.2 -.6 -2.3 .1 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 13.8 -4.0 .2 34.8 1.7 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 16.5 3.0 --- 2.8 --- |
emr | --- 14.0 7.6 19.6 12.5 27.9 |
esa | --- 13.4 7.2 17.6 7.8 16.7 |
gfz | --- 10.9 2.1 8.3 5.4 10.7 |
jpl | --- 22.5 4.6 23.3 4.7 23.7 |
ngs | --- 32.3 11.1 104.8 8.2 56.6 |
sio | --- 9.7 2.3 11.1 3.8 9.5 |
mit | --- 4.7 1.2 5.0 .7 1.1 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 9.9 5.3 13.8 6.3 8.6 |
---------------|------------------------------------------------------------|
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 ngs11557.snx |MCM4 A ----| -0.8 13.6 86.4|
| | |
emr11557.snx sio11557.snx |EISL A ----| 2.7 -2.5 59.8|
| | |
esa11557.snx ngs11557.snx |SANT A ----| -17.6 -6.9 -58.7|
esa11557.snx ngs11557.snx |SUTH A ----| -2.9 10.1 56.8|
| | |
ngs11557.snx sio11557.snx |BAKO A ----| 13.3 -3.0 68.0|
ngs11557.snx sio11557.snx |RIOG A ----| 16.4 -5.1 54.0|
ngs11557.snx sio11557.snx |SANT A ----| 7.0 -2.5 54.4|
| | |
ngs11557.snx mit1155g.snx |BAKO A ----| 13.6 -4.4 70.6|
| | |
IGS02P08.snx cod11557.snx |WUHN A ----| 4.8 2.7 -80.8|
| | |
IGS02P08.snx cod11557.snx |HOFN A ----| 4.2 -1.6 -50.3|
IGS02P08.snx cod11557.snx |KIRU A ----| 3.7 10.0 -52.8|
| | |
IGS02P08.snx gfz11557.snx |WUHN A ----| 8.5 3.7 -81.5|
| | |
IGS02P08.snx gfz11557.snx |HOFN A ----| 6.3 1.3 -51.3|
IGS02P08.snx gfz11557.snx |SSIA A ----| -22.0 12.7 4.6|
| | |
IGS02P08.snx jpl11557.snx |WUHN A ----| 6.1 1.6 -88.5|
IGS02P08.snx jpl11557.snx |YEBE A ----| 11.3 -23.9 119.2|
| | |
IGS02P08.snx ngs11557.snx |WUHN A ----| 8.2 -3.6 -100.8|
| | |
IGS02P08.snx sio11557.snx |WUHN A ----| 10.5 3.8 -74.9|
| | |
IGS02P08.snx mit1155g.snx |WUHN A ----| 7.3 1.6 -83.6|
IGS02P08.snx mit1155g.snx |YEBE A ----| 11.0 -22.6 116.9|
| | |
IGS02P08.snx mit1155g.snx |HOFN A ----| 4.2 -0.5 -47.9|
IGS02P08.snx mit1155g.snx |KIRU A ----| 2.9 9.5 -45.8|
IGS02P08.snx mit1155g.snx |SCH2 A ----| 4.5 15.7 25.6|
IGS02P08.snx mit1155g.snx |SSIA A ----| -19.9 12.5 -0.8|
| | |
IGS02P08.snx ncl1155g.snx |WUHN A ----| 8.5 2.6 -85.5|
| | |
IGS02P08.snx ncl1155g.snx |HOFN A ----| 5.4 -0.4 -47.7|
IGS02P08.snx ncl1155g.snx |SSIA A ----| -20.9 12.8 2.5|
| | |
IGS02P08.snx igs02P1155.snx |SCH2 A ----| 3.6 15.1 19.0|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
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 MADR A MAD2 A MADR A MADR A
MADR A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
40405S031 GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
30314M002 SUTH A SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT sio:
-----------------------------
CAVA A SFEL A VOLT A
MISSING IERS DOMES NOS AT igs:
-----------------------------
SFEL 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
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT igs:
-----------------------------
SFEL A
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