[IGSREPORT-9533] Wk 1178 IGS SINEX Combination
David Hutchison
hutch at geod.nrcan.gc.ca
Thu Aug 22 17:31:29 PDT 2002
******************************************************************************
IGS Electronic Report 22 Aug 17:31:32 PDT 2002 Message Number 9533
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1178 - 02/08/04 to 02/08/10
===================================================================
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
igs02P1178.snx Combined weekly solution.
igs02P1178.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS02P32.snx Cumulative Combined solution.
igs02P1178.sum This file.
igs02P1178.itr Residuals between the AC and the IGS00 for the RF stations.
igs02P1178.res Residuals between the AC and the Combined Weekly solution.
IGS02P32.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 = igs02P1178.snx
IGS = IGS02P32.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
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 | 143 | 45 | 24.638 | 1.000 | 24.637 |
emr | 43 | 23 | 4.524 | 1.000 | 4.526 |
esa | 57 | 36 | 9.424 | 0.999 | 9.418 |
gfz | 91 | 37 | 8.017 | 1.000 | 8.017 |
jpl | 80 | 31 | 5.382 | 1.004 | 5.406 |
ngs | 73 | 49 | 22.837 | 1.000 | 22.836 |
sio | 120 | 45 | 2.001 | 1.000 | 2.001 |
mit | 166 | 47 | 2.961 | 0.772 | 2.286 |
ncl | 111 | 47 | 2.310 | 0.935 | 2.161 |
igs | 160 | 49 | 1.289 | 0.975 | 1.257 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 1.9 0.2 0.6 | 2.6 3.8 12.4 |
emr 22 | 0.4 0.6 1.0 | 1.9 3.1 9.4 |
esa 33 | 0.8 0.1 0.3 | 3.9 4.0 9.2 |
gfz 36 | -0.2 0.2 -2.0 | 3.0 4.6 8.8 |
jpl 29 | 1.5 -0.1 -0.6 | 2.5 3.0 9.8 |
ngs 47 | -0.7 0.2 -1.0 | 5.3 4.5 9.2 |
sio 43 | -1.2 0.3 -2.3 | 4.2 3.5 11.2 |
mit 46 | 0.6 0.1 -0.2 | 2.6 3.3 8.5 |
ncl 46 | 0.7 0.3 -0.3 | 2.5 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 140 | 1.9 0.2 0.5 | 1.9 1.6 8.8 |
emr 42 | 0.7 1.2 0.6 | 1.6 1.8 6.6 |
esa 57 | 0.6 -1.1 0.4 | 3.3 3.8 8.6 |
gfz 90 | -0.7 0.2 -0.2 | 1.5 1.8 5.1 |
jpl 79 | 1.2 0.3 -0.9 | 1.5 1.3 7.9 |
ngs 71 | -1.7 -0.1 -1.1 | 3.7 4.7 8.8 |
sio 114 | -1.5 0.2 0.4 | 2.3 2.8 10.0 |
mit 155 | 0.7 -0.2 0.6 | 1.1 0.9 4.9 |
ncl 109 | 0.6 0.1 0.5 | 0.9 0.9 3.3 |
ITR 48 | -0.3 -0.8 0.2 | 2.7 3.3 7.6 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 127 | 1.6 0.7 -2.2 | 2.7 3.3 12.2 |
emr 41 | 0.9 1.0 -0.6 | 1.6 2.9 10.5 |
esa 56 | 0.5 -0.3 -1.3 | 4.2 3.6 9.2 |
gfz 77 | -0.8 0.0 -2.1 | 2.7 3.7 8.7 |
jpl 70 | 1.5 0.0 -2.3 | 2.4 3.1 11.4 |
ngs 71 | -1.3 0.1 -1.8 | 4.6 4.7 9.9 |
sio 112 | -1.6 0.6 -2.0 | 3.3 3.3 10.9 |
mit 133 | 0.5 0.2 -1.6 | 2.3 2.7 8.9 |
ncl 103 | 0.5 0.2 -1.0 | 2.0 2.3 7.5 |
igs 137 | -0.2 0.3 -2.3 | 2.1 2.6 6.8 |
ITR 54 | -0.2 -0.3 0.0 | 1.0 1.2 2.3 |
---------------|---------------------------|---------------------------|
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 | 0.012 -0.006 -0.017 3.2 12.0 -7.1 1.86 |
emr | -0.038 -0.061 -0.050 -3.5 14.1 -6.1 0.95 |
esa | -0.007 0.018 0.011 -5.8 -1.2 7.9 0.53 |
gfz | -0.003 -0.019 0.030 -0.7 0.8 -1.5 0.98 |
jpl | 0.014 0.031 -0.025 -9.9 4.5 -6.0 1.18 |
ngs | 0.026 -0.005 -0.011 0.4 -4.6 -18.2 1.58 |
sio | 0.160 0.189 0.313 -5.7 10.9 18.5 0.71 |
mit | 0.008 0.018 0.004 -1.9 -0.4 -1.6 1.32 |
ncl | -0.043 -0.038 -0.053 -0.5 -0.5 -3.4 1.02 |
---------------|---------------------------------------------------------------|
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 | 0.061 0.061 0.068 1.6 1.6 1.6 0.25 |
emr | 0.083 0.084 0.097 2.2 2.2 2.2 0.34 |
esa | 0.072 0.073 0.078 1.9 1.9 1.9 0.29 |
gfz | 0.066 0.066 0.076 1.7 1.7 1.7 0.27 |
jpl | 0.072 0.074 0.082 1.9 1.9 1.9 0.29 |
ngs | 0.058 0.057 0.065 1.5 1.5 1.5 0.23 |
sio | 0.061 0.060 0.067 1.6 1.6 1.5 0.24 |
mit | 0.057 0.058 0.067 1.5 1.5 1.5 0.24 |
ncl | 0.058 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 | -2.2 3.2 -9.0 | 1.9 1.7 4.8 |
---------------|---------------------------|---------------------------|
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 | --- -.9 -1.5 --- -3.5 --- |
emr | --- -8.9 -2.2 15.3 -6.6 8.6 |
esa | --- -1.9 -1.6 --- -7.4 --- |
gfz | --- -8.2 -3.8 -10.2 6.8 1.8 |
jpl | --- -.5 3.7 -12.2 .8 12.3 |
ngs | --- 20.4 -8.6 125.8 -24.7 -15.2 |
sio | --- 13.3 -4.7 -4.3 4.8 -3.2 |
mit | --- -874.5 8.5 -5.5 1.5 5.2 |
ncl | --- 1.6 3.4 --- 2.3 --- |
ITR | --- --- --- --- --- --- |
BuA | --- -13.0 -10.2 -6.0 22.3 4.9 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 7.4 2.1 --- 3.2 --- |
emr | --- 8.2 2.3 13.4 1.5 13.1 |
esa | --- 14.0 4.0 --- 3.4 --- |
gfz | --- 6.3 3.0 7.2 1.4 10.9 |
jpl | --- 23.9 4.6 24.0 2.7 14.4 |
ngs | --- 67.8 8.3 52.4 7.3 62.3 |
sio | --- 9.4 3.8 6.6 2.6 7.9 |
mit | --- 503.9 3.2 8.6 4.0 14.7 |
ncl | --- 2.6 .9 --- .8 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 15.7 7.0 10.4 6.3 10.3 |
---------------|------------------------------------------------------------|
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 cod11787.snx |GUAM A ----| 19.0 -14.6 -1.7|
| | |
IGS01P37_RS54.snx emr11787.snx |GUAM A ----| 18.5 -7.4 13.4|
| | |
IGS01P37_RS54.snx esa11787.snx |KOKB A ----| -2.0 -3.8 -62.5|
| | |
IGS01P37_RS54.snx gfz11787.snx |GUAM A ----| 17.7 -11.1 18.0|
| | |
IGS01P37_RS54.snx jpl11787.snx |GUAM A ----| 17.4 -9.4 16.5|
| | |
IGS01P37_RS54.snx mit1178g.snx |GUAM A ----| 18.7 -11.0 11.5|
| | |
IGS01P37_RS54.snx ncl1178g.snx |GUAM A ----| 19.2 -9.2 11.3|
| | |
cod11787.snx esa11787.snx |NLIB A ----| 2.6 8.6 -57.9|
| | |
cod11787.snx ngs11787.snx |BAKO A ----| -10.2 3.7 -69.7|
cod11787.snx ngs11787.snx |NLIB A ----| -4.3 1.9 -54.9|
| | |
cod11787.snx sio11787.snx |RIOG A ----| -1.8 1.2 50.7|
| | |
esa11787.snx jpl11787.snx |MCM4 A ----| -1.5 -2.0 -58.7|
| | |
ngs11787.snx sio11787.snx |BAKO A ----| 4.0 -8.9 54.6|
| | |
ngs11787.snx mit1178g.snx |BAKO A ----| 7.7 -5.1 69.3|
| | |
ngs11787.snx ncl1178g.snx |BAKO A ----| 6.4 -4.2 65.4|
| | |
igs02P1177.snx ngs11787.snx |WHIT A ----| -13.2 -39.4 -105.8|
| | |
igs02P1177.snx mit1178g.snx |WHIT A ----| -4.6 -35.9 -101.3|
| | |
IGS02P31.snx jpl11787.snx |LHUE A ----| 33.9 176.0 220.5|
IGS02P31.snx jpl11787.snx |VNDP A ----| -61.5 141.7 17.1|
| | |
IGS02P31.snx mit1178g.snx |LHUE A ----| 33.9 176.1 220.1|
IGS02P31.snx mit1178g.snx |VNDP A ----| -63.1 142.2 17.0|
| | |
IGS02P31.snx igs02P1178.snx |GUAM A ----| 14.3 -1.3 11.1|
IGS02P31.snx igs02P1178.snx |HERS A ----| -2.5 10.9 3.1|
IGS02P31.snx igs02P1178.snx |MBAR A ----| 11.0 -0.2 -1.1|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
===========================
5-7-1) Station Name Conflicts:
=============================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42005M001 GALA A GALA A GALA B GALA A GALA A GALA B GALA A GALA A GALA A
40405S031 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 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
50103M108 TIDB A TIDB A TID2 A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
TIDB A
50107M004 YAR2 A YAR1 A YAR1 A
MISSING IERS DOMES NOS AT sio:
-----------------------------
ZAMB A 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:
-----------------------------
ZAMB A CAVA A SFEL A VOLT A
5-7-2) Station Antenna Conflicts:
================================
_______________________
|Enforcing these aliases|
|_______________________|
YAR1 A: YAR2 A
IISC A: IISC B
TIDB A: TID2 A
SUTH A: SUTH B
GALA A: GALA B
MADR A: MAD2 A
GOLD A: GOL2 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 cod11787.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 QAQ1 A .1100 .0000 .0000 .1267 -.0003 .0002 .1206 .0000 .0000
IGS QAQ1 A .1080 -.0002 .0001 .1267 -.0003 .0002 .1206 .0000 .0000
Antenna Conflicts in file esa11787.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 jpl11787.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
Antenna Conflicts in file mit1178g.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
Antenna Conflicts in file ncl1178g.snx (ncl).
------- --------- -- ----
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.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
ncl 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 ngs11787.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 2.3200 .0000 .0000
IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3200 .0000 .0000
Antenna Conflicts in file sio11787.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 BOR1 A .1100 .0000 .0000 .1280 .0000 .0000 .0600 .0000 .0000
IGS BOR1 A .1100 .0000 .0000 .1280 .0000 .0000 .0624 .0000 .0000
The following files have no antenna conflicts:
- emr11787.snx (emr)
- gfz11787.snx (gfz)
--
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