[IGSREPORT-9865] Wk 1196 IGS SINEX Combination
David Hutchison
hutch at geod.nrcan.gc.ca
Sat Dec 28 08:23:31 PST 2002
******************************************************************************
IGS Electronic Report 28 Dec 08:23:35 PST 2002 Message Number 9865
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1196 - 02/12/08 to 02/12/14
===================================================================
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
igs02P1196.snx Combined weekly solution.
igs02P1196.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS02P50.snx Cumulative Combined solution.
igs02P1196.sum This file.
igs02P1196.itr Residuals between the AC and the IGS00 for the RF stations.
igs02P1196.res Residuals between the AC and the Combined Weekly solution.
IGS02P50.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 = igs02P1196.snx
IGS = IGS02P50.snx
BuA = IERS Bulletin A
mit are used to quality control the weekly combination.
gfz excluded from the geocenter estimation (Sec. 5-4).
New stations in the cumulative solution IGS02P50.snx
BAN2 A ----
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 | 141 | 45 | 27.232 | 1.000 | 27.243 |
emr | 45 | 25 | 4.954 | 1.001 | 4.957 |
gfz | 154 | 44 | 16.550 | 1.001 | 16.559 |
jpl | 96 | 33 | 4.901 | 1.000 | 4.903 |
ngs | 73 | 46 | 24.508 | 1.000 | 24.515 |
sio | 134 | 47 | 2.352 | 1.000 | 2.352 |
mit | 191 | 46 | 0.884 | 0.999 | 0.884 |
igs | 187 | 48 | 1.456 | 1.000 | 1.456 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 0.4 0.4 -1.0 | 3.4 4.3 11.4 |
emr 24 | -0.5 -0.1 0.4 | 3.7 4.0 9.4 |
gfz 43 | -0.4 0.6 -0.7 | 3.7 3.8 9.4 |
jpl 32 | -1.2 0.1 0.6 | 3.8 4.0 9.6 |
ngs 45 | -1.4 1.1 -0.4 | 5.9 6.3 12.9 |
sio 46 | -0.4 0.6 0.3 | 3.6 4.5 11.6 |
mit 45 | 0.3 0.4 0.0 | 4.5 4.5 9.0 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 140 | 0.7 0.3 -0.5 | 1.9 2.4 8.7 |
emr 45 | 0.0 0.6 0.9 | 2.1 3.2 6.6 |
gfz 150 | -1.0 0.8 -0.7 | 1.6 2.1 5.1 |
jpl 96 | -1.2 -0.2 -0.3 | 2.2 2.1 7.4 |
ngs 73 | -1.4 0.9 0.2 | 4.0 5.2 9.2 |
sio 129 | -0.3 -0.5 1.0 | 1.8 2.8 6.7 |
mit 177 | 1.4 -0.5 0.9 | 3.9 3.5 6.0 |
ITR 47 | 0.0 -0.6 0.2 | 3.6 3.5 8.5 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 127 | -0.1 0.5 -0.5 | 2.8 3.3 10.3 |
emr 44 | -1.0 0.9 2.3 | 3.1 4.0 8.5 |
gfz 126 | -2.0 1.0 0.0 | 3.2 3.5 8.8 |
jpl 84 | -2.4 0.1 -0.2 | 3.1 3.7 9.8 |
ngs 73 | -2.2 1.2 0.6 | 5.3 5.8 12.0 |
sio 121 | -0.7 0.0 1.2 | 3.3 4.2 11.0 |
mit 146 | 0.6 -0.1 0.9 | 4.5 3.8 9.0 |
igs 155 | -0.8 0.1 0.3 | 2.6 3.0 7.4 |
ITR 54 | -0.3 -0.5 0.0 | 1.4 1.6 3.1 |
---------------|---------------------------|---------------------------|
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 -0.034 8.7 12.3 -14.5 1.22 |
emr | 0.014 -0.024 -0.027 11.7 12.4 2.3 0.29 |
gfz | -0.029 -0.013 0.000 -0.4 0.7 -1.9 1.02 |
jpl | -0.001 0.002 -0.036 3.7 9.7 -16.6 0.70 |
ngs | -0.050 0.271 -0.155 -24.1 -5.6 15.6 1.31 |
sio | -0.090 0.001 -0.064 14.9 -1.5 54.6 1.42 |
mit | 0.048 0.013 0.025 -0.6 1.2 -1.1 1.01 |
---------------|---------------------------------------------------------------|
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 | 0.059 0.061 0.067 1.5 1.5 1.5 0.24 |
emr | 0.080 0.079 0.092 2.0 2.0 2.0 0.32 |
gfz | 0.059 0.061 0.070 1.6 1.6 1.6 0.24 |
jpl | 0.070 0.070 0.078 1.8 1.8 1.8 0.28 |
ngs | 0.059 0.060 0.068 1.6 1.6 1.6 0.24 |
sio | 0.058 0.059 0.068 1.5 1.5 1.5 0.24 |
mit | 0.058 0.059 0.069 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 | -8.4 0.2 7.2 | 2.9 1.9 5.5 |
---------------|---------------------------|---------------------------|
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 | --- 11.3 -2.1 --- 5.4 --- |
emr | --- -4.0 1.8 13.1 2.4 -11.1 |
gfz | --- 3.3 1.3 1.6 -8.3 -14.7 |
jpl | --- -10.5 -1.4 11.0 4.3 22.1 |
ngs | --- -47.6 31.4 -77.7 16.0 74.1 |
sio | --- -7.7 8.6 1.0 6.4 -2.7 |
mit | --- -9.8 -50.2 73.3 -1.2 -7.4 |
ITR | --- --- --- --- --- --- |
BuA | --- 10.8 -6.8 2.8 28.2 -5.4 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 3.3 2.4 --- 3.9 --- |
emr | --- 4.7 4.9 10.2 5.1 10.5 |
gfz | --- 9.7 1.8 6.7 7.4 4.5 |
jpl | --- 16.4 3.8 14.9 4.2 11.2 |
ngs | --- 36.7 18.4 77.5 10.6 57.9 |
sio | --- 10.9 3.4 8.8 2.8 6.6 |
mit | --- 43.1 566.4 1997.6 15.0 30.9 |
ITR | --- --- --- --- --- --- |
BuA | --- 8.5 7.6 16.6 10.9 14.1 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS01P37_RS54.snx ngs11967.snx |MCM4 A ----| -3.5 7.3 -98.0|
| | |
cod11967.snx jpl11967.snx |KELY B ----| 0.2 -0.9 -80.7|
| | |
cod11967.snx ngs11967.snx |BAKO A ----| -9.1 6.9 -59.0|
cod11967.snx ngs11967.snx |KOKB A 2| 24.1 20.4 55.8|
| | |
cod11967.snx sio11967.snx |WUHN A 2| 1.9 -2.7 50.5|
| | |
emr11967.snx sio11967.snx |WUHN A 2| -1.7 0.9 59.3|
| | |
gfz11967.snx ngs11967.snx |KOKB A 2| 24.1 21.7 70.6|
| | |
jpl11967.snx ngs11967.snx |KELY B ----| 0.4 1.9 69.7|
| | |
jpl11967.snx sio11967.snx |KELY B ----| -0.8 -0.1 60.2|
| | |
jpl11967.snx mit1196g.snx |KELY B ----| 6.8 -10.6 56.1|
jpl11967.snx mit1196g.snx |SIMO A ----| 3.9 4.2 50.5|
jpl11967.snx mit1196g.snx |VNDP A ----| 50.2 -22.1 27.9|
| | |
ngs11967.snx sio11967.snx |BAKO A ----| 7.9 -1.1 50.7|
ngs11967.snx sio11967.snx |KOKB A 2| -21.0 -20.0 -63.6|
| | |
ngs11967.snx mit1196g.snx |BAKO A ----| 6.2 -7.8 57.3|
ngs11967.snx mit1196g.snx |KOKB A 2| -18.0 -18.3 -66.7|
| | |
IGS02P49.snx cod11967.snx |HERS A ----| 0.3 14.6 -5.5|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
===========================
5-7-1) Station Name Conflicts:
=============================
IERS DOMES NO cod emr gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A
40405S031 GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
22306M002 IISC A IISC A IISC A IISC A IISC B IISC A IISC A IISC A
13407S012 MADR A MADR A MAD2 A MADR A MAD2 A MADR A MADR A
50103M108 TIDB A TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TID1 A
TID1 A TIDB A TIDB A
TID2 A
50107M004 YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PMON A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
CAVA A SFEL A VOLT A
IERS DOMES NO mit IGS igs
============= ====== ====== ======
13407S012 MADR A MADR A MADR A
MAD2 A
40405S031 GOLD A GOLD A GOLD A
GOL2 A
50103M108 TIDB A TIDB A TID1 A
TID1 A TIDB A
TID2 A
50107M004 YAR2 A YAR1 A YAR1 A
MISSING IERS DOMES NOS AT mit:
-----------------------------
PALM A PMON A BISH A CAVA A SFEL A VOLT A
5-7-2) Station Antenna Conflicts:
================================
_______________________
|Enforcing these aliases|
|_______________________|
YAR1 A: YAR2 A
MADR A: MAD2 A
AREQ A: AREQ B
GOLD A: GOL2 A
IISC A: IISC B
ABBREVIATIONS:
-------------
L1: L1 Offset
L2: L2 Offset
ECC: Eccentricity
-N: NORTH (Latitude)
-E: EAST (Longitude)
-U: UP (Vertical)
Compare to file IGS.SNX (IGS).
Antenna Conflicts in file cod11967.snx (cod).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
cod WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3200 .0000 .0000
IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 -.0094 -.0022
Antenna Conflicts in file gfz11967.snx (gfz).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
gfz NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000
IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010
Antenna Conflicts in file jpl11967.snx (jpl).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
jpl NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000
IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010
jpl WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 .0000 .0000
IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 -.0094 -.0022
Antenna Conflicts in file mit1196g.snx (mit).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
mit NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000
IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010
mit WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 .0000 .0000
IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 -.0094 -.0022
Antenna Conflicts in file ngs11967.snx (ngs).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
ngs BAKO A .0757 .0000 .0000 .0745 .0000 .0000 1.6160 .0000 .0000
IGS BAKO A .0780 .0000 -.0030 .0744 -.0031 -.0013 1.6160 .0000 .0000
ngs NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000
IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010
ngs WUHN A .1081 .0000 .0000 .1256 .0000 .0000 2.3610 -.0094 -.0022
IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 -.0094 -.0022
Antenna Conflicts in file sio11967.snx (sio).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
sio NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000
IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010
sio QAQ1 A .1080 -.0002 .0001 .1267 -.0003 .0002 .0000 .0000 .0000
IGS QAQ1 A .1080 -.0002 .0001 .1267 -.0003 .0002 .1206 .0000 .0000
sio WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 .0000 .0000
IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 -.0094 -.0022
The following file has no antenna conflicts: emr11967.snx (emr).
David Hutchison
Geodetic Survey of Canada
Ottawa, Ontario, Canada
Internet: hutch at geod.emr.ca
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