[IGSREPORT-9770] Wk 1191 IGS SINEX Combination
David Hutchison
hutch at geod.nrcan.gc.ca
Thu Nov 21 19:43:50 PST 2002
******************************************************************************
IGS Electronic Report 21 Nov 19:43:53 PST 2002 Message Number 9770
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1191 - 02/11/03 to 02/11/09
===================================================================
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
igs02P1191.snx Combined weekly solution.
igs02P1191.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS02P45.snx Cumulative Combined solution.
igs02P1191.sum This file.
igs02P1191.itr Residuals between the AC and the IGS00 for the RF stations.
igs02P1191.res Residuals between the AC and the Combined Weekly solution.
IGS02P45.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 = igs02P1191.snx
IGS = IGS02P45.snx
BuA = IERS Bulletin A
mit are used to quality control the weekly combination.
gfz excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
After unconstraining:
emr NRC1 NRC2
ngs BAKO
cod NLIB
jpl KELY
New stations in the cumulative solution IGS02P45.snx
FAIR A 2
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 | 138 | 43 | 24.367 | 1.000 | 24.360 |
emr | 35 | 19 | 4.950 | 1.000 | 4.949 |
esa | 55 | 35 | 10.153 | 1.000 | 10.152 |
gfz | 144 | 43 | 14.424 | 1.000 | 14.418 |
jpl | 77 | 28 | 4.455 | 1.000 | 4.454 |
ngs | 76 | 46 | 23.787 | 1.000 | 23.775 |
sio | 127 | 45 | 1.962 | 1.000 | 1.961 |
mit | 181 | 45 | 3.247 | 0.818 | 2.657 |
igs | 173 | 47 | 1.306 | 0.999 | 1.305 |
---------------|-----|-----|---------------|---------------|---------------|
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 42 | 0.9 0.5 -1.2 | 3.0 4.4 12.1 |
emr 18 | -0.7 -0.4 -0.2 | 4.9 3.1 7.7 |
esa 34 | -2.1 0.9 1.3 | 6.0 6.0 12.6 |
gfz 42 | 0.3 0.3 -0.9 | 3.6 3.6 7.5 |
jpl 27 | -0.4 0.0 0.8 | 2.9 2.8 8.2 |
ngs 45 | 0.6 1.3 -0.5 | 5.4 6.0 9.9 |
sio 44 | 0.4 0.2 -0.1 | 3.6 4.2 10.0 |
mit 44 | 0.8 0.5 -0.7 | 2.9 3.4 8.1 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 134 | 0.0 0.7 -1.2 | 2.3 2.3 8.8 |
emr 34 | -1.2 -0.1 -0.3 | 2.9 2.8 7.6 |
esa 54 | -3.5 0.4 2.5 | 5.2 4.5 9.5 |
gfz 139 | -0.2 -0.2 -1.1 | 1.3 1.6 5.0 |
jpl 75 | -0.8 -0.3 0.4 | 2.0 1.8 7.8 |
ngs 72 | 0.5 1.1 -0.1 | 3.5 5.1 8.2 |
sio 119 | 0.1 -0.6 1.5 | 1.6 2.8 7.1 |
mit 165 | 0.0 0.2 -0.7 | 0.7 0.8 3.5 |
ITR 46 | -0.5 -0.5 0.4 | 3.3 2.8 7.4 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 125 | 0.4 1.0 -2.2 | 2.9 3.3 11.3 |
emr 34 | -0.8 0.0 1.1 | 3.7 3.1 8.4 |
esa 54 | -3.1 0.2 1.8 | 5.5 5.2 11.5 |
gfz 118 | 0.1 -0.2 -1.5 | 3.1 2.7 7.0 |
jpl 67 | -0.6 0.1 0.5 | 2.4 2.3 8.8 |
ngs 75 | 0.5 0.9 -0.2 | 6.0 6.9 10.7 |
sio 116 | 0.4 -0.1 0.6 | 3.1 3.8 9.9 |
mit 136 | 0.4 0.5 -1.5 | 2.3 2.2 7.0 |
igs 142 | 0.4 0.2 -0.7 | 2.1 2.1 5.9 |
ITR 54 | -0.3 -0.5 0.0 | 1.3 1.5 2.9 |
---------------|---------------------------|---------------------------|
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 | 0.014 0.001 -0.028 6.6 5.7 -8.6 1.22 |
emr | -0.012 -0.022 -0.024 -6.6 11.3 -5.0 0.38 |
esa | 0.037 -0.105 -0.042 0.6 19.0 5.1 0.14 |
gfz | -0.019 0.007 0.033 -0.9 0.6 -1.2 0.80 |
jpl | -0.006 0.004 -0.014 1.5 9.8 9.3 0.43 |
ngs | -0.036 0.088 -0.160 -15.9 0.3 5.2 1.45 |
sio | 0.017 0.120 -0.023 6.5 4.0 43.9 1.06 |
mit | 0.023 -0.024 0.018 0.3 -0.4 -0.6 0.95 |
---------------|---------------------------------------------------------------|
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 0.062 0.068 1.6 1.6 1.6 0.24 |
emr | 0.088 0.089 0.109 2.4 2.4 2.4 0.37 |
esa | 0.069 0.072 0.078 1.8 1.8 1.8 0.28 |
gfz | 0.060 0.062 0.070 1.6 1.6 1.6 0.25 |
jpl | 0.076 0.078 0.087 2.0 2.0 2.0 0.31 |
ngs | 0.058 0.060 0.068 1.5 1.5 1.5 0.24 |
sio | 0.059 0.060 0.068 1.5 1.5 1.5 0.24 |
mit | 0.058 0.060 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 | -3.2 1.1 5.8 | 2.4 1.6 4.3 |
---------------|---------------------------|---------------------------|
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 | --- -4.4 -1.4 --- -2.3 --- |
emr | --- -5.6 4.5 14.2 -5.7 2.2 |
esa | --- -1.5 .6 --- -12.7 --- |
gfz | --- 7.6 -1.7 .6 9.1 -6.3 |
jpl | --- -23.1 -1.8 17.3 -6.7 10.4 |
ngs | --- 31.0 -7.1 -20.6 21.0 -26.6 |
sio | --- -.8 -3.1 -1.3 3.3 5.7 |
mit | --- 2.6 -3.7 -1.3 -2.6 1.2 |
ITR | --- --- --- --- --- --- |
BuA | --- 5.4 -21.2 1.2 24.2 .0 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 8.2 2.3 --- 1.7 --- |
emr | --- 14.3 3.7 13.4 6.1 11.5 |
esa | --- 12.7 4.4 --- 4.4 --- |
gfz | --- 5.5 2.0 9.5 2.8 8.0 |
jpl | --- 35.5 2.5 15.4 4.1 10.7 |
ngs | --- 53.0 10.5 22.1 10.6 30.3 |
sio | --- 5.8 2.8 5.0 3.4 12.8 |
mit | --- 2.5 1.2 8.9 1.3 10.2 |
ITR | --- --- --- --- --- --- |
BuA | --- 8.9 2.7 8.6 6.3 13.6 |
---------------|------------------------------------------------------------|
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 esa11917.snx |CHAT A ----| 3.0 3.9 -75.8|
IGS01P37_RS54.snx esa11917.snx |SANT A ----| 5.4 1.2 60.2|
| | |
cod11917.snx sio11917.snx |WUHN A 2| 4.1 -1.3 53.5|
| | |
gfz11917.snx jpl11917.snx |WUHN A 2| 5.0 -0.2 -58.4|
| | |
jpl11917.snx sio11917.snx |WUHN A 2| 7.8 -3.2 65.8|
| | |
jpl11917.snx mit1191g.snx |WUHN A 2| 4.6 -0.6 52.3|
| | |
IGS02P44.snx cod11917.snx |AREQ A 2| -18.7 -27.5 -3.6|
IGS02P44.snx cod11917.snx |HERS A ----| -1.6 15.8 -8.8|
| | |
IGS02P44.snx emr11917.snx |AREQ A 2| -18.9 -36.4 -2.7|
IGS02P44.snx emr11917.snx |KELY A ----| -4.7 -0.2 50.6|
| | |
IGS02P44.snx gfz11917.snx |AREQ A 2| -24.1 -31.2 -7.0|
| | |
IGS02P44.snx gfz11917.snx |KELY A ----| -0.8 0.3 46.5|
IGS02P44.snx gfz11917.snx |SIO3 A ----| -1.3 -2.7 -52.1|
| | |
IGS02P44.snx jpl11917.snx |VNDP A ----| -66.4 145.5 -8.8|
| | |
IGS02P44.snx jpl11917.snx |AREQ A 2| -19.0 -32.0 -2.2|
| | |
IGS02P44.snx jpl11917.snx |BOGT A ----| 8.2 1.4 -70.4|
| | |
IGS02P44.snx sio11917.snx |AREQ A 2| -24.4 -31.0 15.9|
| | |
IGS02P44.snx mit1191g.snx |VNDP A ----| -67.7 144.7 -11.4|
| | |
IGS02P44.snx mit1191g.snx |BOGT A ----| 3.8 -0.3 -52.1|
IGS02P44.snx mit1191g.snx |HERS A ----| -0.3 13.3 -1.5|
IGS02P44.snx mit1191g.snx |SIO3 A ----| -0.6 -1.7 -50.6|
| | |
IGS02P44.snx igs02P1191.snx |AREQ A 2| -19.4 -31.2 11.8|
IGS02P44.snx igs02P1191.snx |GALA A ----| -8.1 0.5 -9.9|
IGS02P44.snx igs02P1191.snx |MAG0 A ----| 3.9 6.2 8.5|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
===========================
5-7-1) Station Name 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
42005M001 GALA A GALA B GALA A GALA A GALA B GALA A GALA A
40405S031 GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
22306M002 IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
13407S012 MADR A MADR A MADR A MAD2 A MADR A MADR A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
30314M002 SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
50103M108 TIDB A TIDB A TIDB A TID1 A TID2 A TID2 A TIDB A TID1 A
TID2 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:
-----------------------------
PMON A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
JSLM A CAVA A SFEL A VOLT A
MISSING IERS DOMES NOS AT igs:
-----------------------------
JSLM A
IERS DOMES NO mit IGS igs
============= ====== ====== ======
13407S012 MADR A MADR A MADR A
MAD2 A
40114M001 NRC1 A NRC1 A NRC1 A
NRC2 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 JSLM A CAVA A SFEL A VOLT A
MISSING IERS DOMES NOS AT igs:
-----------------------------
JSLM A
5-7-2) Station Antenna Conflicts:
================================
_______________________
|Enforcing these aliases|
|_______________________|
TID1 A: TIDB A TID2 A
YAR1 A: YAR2 A
SUTH A: SUTH B
TIDB A: TID2 A TID1 A
IISC A: IISC B
GOLD A: GOL2 A
MADR A: MAD2 A
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 cod11917.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 esa11917.snx (esa).
------- --------- -- ----
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.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
esa 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 gfz11917.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 jpl11917.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 mit1191g.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 ngs11917.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 MCM4 A .1100 .0000 .0000 .1280 .0000 .0000 .1830 .0000 .0000
IGS MCM4 A .1100 .0000 .0000 .1280 .0000 .0000 .0814 .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 sio11917.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 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: emr11917.snx (emr).
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