[IGSREPORT-10213] Wk 1214 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu May 1 18:29:49 PDT 2003
******************************************************************************
IGS Electronic Report 01 May 18:29:52 PDT 2003 Message Number 10213
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1214 - 03/04/13 to 03/04/19
===================================================================
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
igs03P1214.snx Combined weekly solution.
igs03P1214.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS03P16.snx Cumulative Combined solution.
igs03P1214.sum This file.
igs03P1214.itr Residuals between the AC and the IGS00 for the RF stations.
igs03P1214.res Residuals between the AC and the Combined Weekly solution.
IGS03P16.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 = igs03P1214.snx ( Weekly Combination )
IGS = IGS03P16.snx ( Cumulative Solution )
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:
esa PIMO SANT
ngs KOKB
ncl QAQ1
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 | 154 | 43 | 22.437 | 1.000 | 22.439 |
emr | 39 | 20 | 5.157 | 1.001 | 5.163 |
esa | 58 | 36 | 13.271 | 0.995 | 13.209 |
gfz | 174 | 44 | 8.371 | 1.011 | 8.466 |
jpl | 85 | 27 | 4.800 | 1.012 | 4.859 |
ngs | 74 | 45 | 24.952 | 1.000 | 24.942 |
sio | 145 | 46 | 2.085 | 1.008 | 2.102 |
mit | 232 | 44 | 2.004 | 1.027 | 2.058 |
igs | 198 | 46 | 1.418 | 1.007 | 1.428 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 0.8 0.3 -0.2 | 2.7 3.9 9.9 |
emr 19 | -1.2 0.1 0.3 | 5.0 2.8 9.4 |
esa 35 | -1.0 -0.2 0.9 | 5.5 4.8 12.1 |
gfz 43 | 1.0 0.3 0.1 | 3.2 4.0 7.8 |
jpl 26 | -0.4 0.0 1.2 | 3.5 3.4 9.1 |
ngs 44 | -3.0 0.7 -0.9 | 5.1 7.4 16.7 |
sio 45 | 0.8 0.8 0.0 | 4.1 5.3 9.0 |
mit 43 | 0.3 0.5 0.1 | 3.1 3.5 6.9 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 150 | 0.5 0.2 -0.3 | 1.4 1.4 5.2 |
emr 39 | -2.0 -0.2 -1.4 | 2.3 1.9 6.9 |
esa 57 | -1.7 0.0 0.3 | 3.9 3.4 9.6 |
gfz 170 | 0.5 -0.2 -1.0 | 1.4 1.3 5.0 |
jpl 84 | -0.6 -0.3 0.9 | 1.8 1.8 7.7 |
ngs 73 | -3.1 1.2 0.3 | 3.7 6.1 14.4 |
sio 139 | 1.0 0.1 0.8 | 2.8 2.4 5.8 |
mit 192 | -0.2 0.2 -0.6 | 1.2 1.1 3.3 |
ITR 45 | -0.4 -0.5 0.3 | 3.3 3.6 7.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 134 | 0.6 0.1 0.1 | 2.4 2.9 8.7 |
emr 35 | -1.9 0.0 -1.7 | 3.5 2.8 9.1 |
esa 57 | -1.2 -0.3 0.2 | 4.8 3.7 13.5 |
gfz 139 | 0.4 -0.4 -0.6 | 2.6 2.6 7.4 |
jpl 68 | -0.9 0.1 1.2 | 2.5 2.7 10.1 |
ngs 72 | -3.2 1.1 1.0 | 4.4 7.1 16.9 |
sio 125 | 1.0 0.1 1.3 | 3.8 3.7 9.2 |
mit 149 | -0.1 0.1 -0.5 | 2.4 2.3 7.1 |
igs 154 | -0.1 -0.2 0.5 | 2.1 2.4 6.5 |
ITR 54 | -0.3 -0.6 0.1 | 1.8 1.9 3.8 |
---------------|---------------------------|---------------------------|
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 | 0.000 0.000 0.006 14.6 8.8 6.3 1.62 |
emr | 0.024 0.038 -0.025 -15.6 -1.1 13.6 0.90 |
esa | 0.170 -0.071 0.030 -10.5 24.8 -0.0 0.79 |
gfz | 0.016 -0.011 0.058 -1.6 1.3 -0.3 1.10 |
jpl | 0.010 -0.004 0.007 -1.2 2.4 14.4 0.47 |
ngs | -0.049 0.044 -0.172 2.2 -1.2 38.2 1.04 |
sio | -0.118 -0.024 -0.024 9.0 -6.2 44.5 1.29 |
mit | 0.002 -0.008 -0.008 1.3 -0.4 0.2 1.55 |
---------------|---------------------------------------------------------------|
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 0.069 1.6 1.6 1.6 0.25 |
emr | 0.090 0.089 0.108 2.3 2.3 2.3 0.36 |
esa | 0.069 0.071 0.076 1.8 1.8 1.8 0.28 |
gfz | 0.059 0.061 0.069 1.6 1.6 1.6 0.24 |
jpl | 0.077 0.076 0.089 2.0 2.0 2.0 0.31 |
ngs | 0.059 0.060 0.068 1.5 1.6 1.5 0.24 |
sio | 0.058 0.060 0.067 1.5 1.5 1.5 0.24 |
mit | 0.059 0.061 0.069 1.6 1.6 1.6 0.24 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 3.2 0.7 19.2 | 2.6 2.0 4.4 |
---------------|---------------------------|---------------------------|
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 | --- .8 -4.7 --- -6.2 --- |
emr | --- -10.5 .2 -12.8 .9 19.0 |
esa | --- -6.3 -18.0 --- -18.2 --- |
gfz | --- -5.5 2.2 1.3 5.2 -1.8 |
jpl | --- 37.9 -2.7 -24.8 3.7 13.4 |
ngs | --- -42.1 28.6 35.9 -2.3 -12.9 |
sio | --- 13.1 -.6 -.4 3.5 -16.6 |
mit | --- 20.9 -1.5 -3.0 3.8 -11.9 |
ITR | --- --- --- --- --- --- |
BuA | --- 2.6 -2.7 -3.4 23.2 -12.5 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 6.8 1.1 --- 1.6 --- |
emr | --- 10.7 3.4 10.8 3.4 18.5 |
esa | --- 7.1 9.0 --- 4.1 --- |
gfz | --- 2.9 2.2 6.0 2.5 2.1 |
jpl | --- 23.4 3.3 5.6 2.4 10.3 |
ngs | --- 20.3 10.5 55.4 5.5 27.3 |
sio | --- 5.7 3.5 12.8 3.7 6.7 |
mit | --- 4.1 4.4 19.8 3.5 11.0 |
ITR | --- --- --- --- --- --- |
BuA | --- 14.6 3.8 16.7 3.4 12.6 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
emr12147.snx ngs12147.snx |THTI A ----| 2.0 8.7 51.8|
| | |
gfz12147.snx jpl12147.snx |DWH1 A ----| -0.4 -2.0 -50.4|
| | |
jpl12147.snx ngs12147.snx |EISL A ----| 8.8 -10.7 50.0|
| | |
jpl12147.snx mit1214g.snx |TNML A ----| 11.5 1.1 -1574.4|
| | |
sio12147.snx mit1214g.snx |TNML A ----| 4.8 -2.2 -1586.1|
| | |
jpl12147.snx mit1214g.snx |GUAO A ----| 0.5 -0.7 76.0|
| | |
igs03P1213.snx jpl12147.snx |IRKJ A ----| -0.2 0.2 137.3|
| | |
igs03P1213.snx jpl12147.snx |BOGT A ----| 0.6 0.2 -53.9|
| | |
igs03P1213.snx ngs12147.snx |BOGT A ----| -3.0 -2.0 -68.2|
| | |
igs03P1213.snx mit1214g.snx |IRKJ A ----| -0.6 0.2 133.1|
| | |
igs03P1213.snx mit1214g.snx |BOGT A ----| 1.0 -2.2 -50.2|
| | |
IGS03P15.snx cod12147.snx |RESO A ----| 1.5 -16.1 6.3|
| | |
IGS03P15.snx gfz12147.snx |MANZ A ----| 84.0 61.5 -57.1|
| | |
IGS03P15.snx gfz12147.snx |BOGT A ----| 2.3 -3.4 -45.8|
IGS03P15.snx gfz12147.snx |KELY A ----| 0.3 3.2 51.7|
IGS03P15.snx gfz12147.snx |RESO A ----| 2.5 -14.2 3.7|
| | |
IGS03P15.snx igs03P1214.snx |BOGT A ----| 7.0 -4.1 -51.0|
-----------------------------------------|------------|-----------------------|
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
40405S031 GOLD A 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 MADR A MAD2 A MADR A MADR A
22003M001 PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A
30314M002 SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
43001M002 THU3 A THU3 A THU3 A THU3 A THU2 A
THU2 A THU3 A
50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50107M004 YAR2 A YAR2 A YAR1 A YAR1 A
12361M001 KHAJ A KHAJ 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 BRAS A
IERS DOMES NO mit IGS igs
============= ====== ====== ======
13407S012 MADR A MADR A MADR A
MAD2 A
43001M002 THU3 A THU2 A
THU2 A THU3 A
40405S031 GOLD A GOLD A GOLD A
GOL2 A
50103M108 TIDB A TIDB A TIDB A
TID2 A
TID1 A
50107M004 YAR2 A YAR1 A YAR1 A
66010M001 DAV1 A DAV1 A DAV1 A
DAVR A
14001M004 ZIMM A ZIMM A ZIMM A
MISSING IERS DOMES NOS AT mit:
-----------------------------
PMON A BISH A
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