[IGSREPORT-6403] Wk 1020 Preliminary IGS SINEX Combination
R.
R.
Wed Sep 1 12:16:26 PDT 1999
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IGS Electronic Report Wed Sep 1 12:16:26 PDT 1999 Message Number 6403
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Author: R. Ferland , D. Hutchison
Subject: Wk 1020 Preliminary IGS SINEX Combination
===================================================================
Combined AC solution for GPS week 1020 - 99/07/25 to 99/07/31
===================================================================
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
igs99P1020.snx Combined weekly solution.
igs99P1020.erp Daily Earth Rotation Parameters.
IGS99P30.snx Cumulative Combined solution.
igs99P1020.sum This file.
igs99P1020.itr Residuals between the AC and the ITRF96 for the RF stations.
igs99P1020.res Residuals between the AC and the Combined Weekly solution.
IGS99P30.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
ITRF96 Reference Frame (RF) stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/ITRF96_IGS_RS47.SNX.Z
3-4) The AC are compared to ITRF, 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 ITRF96 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the ITRF96 of the reference epoch
using a 14-parameters transformation and the 47 ITRF station positions
and velocities.
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:
===========
igs = igs99P1020.snx
IGS = IGS99P30.snx
JPL = jpl1020g.snx
jpl = jpl10207.snx
ITR = ITRF96_IGS_RS47.SNX
itr = ITRF97 with the current 47 Reference Frame stations plus
AUCK BAHR CAS1 CHAT MCM4.
JPL mit ncl itr are used to quality control the weekly combination.
emr gfz ngs sio excluded from the geocenter estimation (Sec. 5-4).
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 | 112 | 37 | 34.640 | 1.001 | 34.667 |
emr | 45 | 28 | 6.332 | 0.998 | 6.319 |
esa | 57 | 33 | 6.858 | 1.001 | 6.865 |
gfz | 68 | 33 | 22.918 | 1.001 | 22.937 |
jpl | 58 | 24 | 4.437 | 1.000 | 4.438 |
ngs | 75 | 43 | 38.408 | 1.002 | 38.477 |
sio | 124 | 38 | 2.420 | 0.991 | 2.399 |
JPL | 134 | 39 | 2.621 | 1.001 | 2.624 |
mit | 150 | 40 | 4.369 | 1.000 | 4.371 |
ncl | 86 | 38 | 2.793 | 1.001 | 2.795 |
itr | 52 | 48 | 10.000 | 0.330 | 3.297 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & R.M.S. :
========================================================
5-2-1) With respect to ITRF96 Reference Frame stations:
=========================================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 1.9 -1.0 0.7 | 5.8 7.2 14.4 |
emr | 0.6 -0.3 -1.7 | 9.8 13.9 16.9 |
esa | 2.8 -0.4 -1.1 | 8.1 14.8 16.6 |
gfz | 0.1 -1.2 0.5 | 5.8 6.8 11.6 |
jpl | 1.7 0.1 -1.0 | 7.4 8.9 8.3 |
ngs | 1.3 -1.0 0.7 | 6.4 10.5 14.6 |
sio | -1.1 -1.6 -0.7 | 6.2 10.2 14.7 |
JPL | 0.8 -1.0 0.5 | 5.4 6.7 10.4 |
mit | 1.5 -0.9 0.1 | 5.7 8.3 9.2 |
ncl | 0.4 -0.8 0.3 | 4.9 5.8 5.7 |
itr | -0.3 0.0 -0.5 | 4.5 6.6 9.7 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to Weekly Combination:
============================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 1.4 0.4 0.6 | 2.7 3.3 11.9 |
emr | -0.8 1.1 -2.2 | 5.8 10.2 12.9 |
esa | 2.2 -2.1 0.0 | 7.1 9.4 14.0 |
gfz | -0.9 -0.6 -0.3 | 2.4 2.4 6.5 |
jpl | 0.5 -0.5 0.2 | 3.4 3.9 7.0 |
ngs | -0.4 -0.4 -0.2 | 6.8 10.7 15.5 |
sio | -2.0 -1.6 -0.9 | 3.3 4.7 7.1 |
JPL | 0.1 -0.6 1.4 | 1.4 1.4 6.0 |
mit | 0.6 0.0 1.8 | 2.1 1.6 7.7 |
ncl | -0.3 -0.5 0.0 | 1.6 1.6 6.0 |
itr | -1.0 0.7 -0.5 | 2.9 5.0 8.6 |
ITR | -0.9 1.6 0.0 | 5.6 9.2 11.3 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to Cumulative Combination:
================================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 1.3 0.1 -1.0 | 4.5 4.0 15.1 |
emr | -0.4 0.8 -5.1 | 6.9 10.5 18.1 |
esa | 3.0 -2.0 -1.4 | 8.6 10.7 16.3 |
gfz | 0.0 -0.7 -1.0 | 2.4 4.3 10.1 |
jpl | 1.6 -0.4 -1.2 | 4.1 5.1 9.9 |
ngs | 0.2 -0.7 -1.3 | 7.8 11.2 17.0 |
sio | -1.7 -1.7 -2.2 | 4.3 6.8 13.2 |
JPL | 0.5 -0.7 0.4 | 2.9 5.3 12.0 |
mit | 0.7 -0.1 0.7 | 3.9 5.1 15.6 |
ncl | 0.4 -0.8 -0.8 | 2.3 3.2 10.1 |
itr | 0.4 0.3 -1.0 | 2.8 3.3 9.7 |
igs | 0.4 -0.1 -1.1 | 2.7 4.9 10.6 |
ITR | 0.5 0.9 -0.9 | 5.7 8.1 13.9 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> ITRF96_IGS_RS47.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 -0.003 -0.013 7.7 -6.3 -1.8 1.63 |
emr | 8.472 -6.052 -38.161 9.2 -77.4 133.4 0.48 |
esa | -0.025 0.048 0.103 -9.4 -9.6 7.2 -1.20 |
gfz | 0.078 0.066 0.045 -0.0 1.9 2.8 -0.85 |
jpl | 0.113 -0.008 0.058 0.1 2.4 13.7 0.69 |
ngs | -0.219 0.283 0.089 -13.0 -18.2 48.7 0.91 |
sio | -0.472 -0.108 0.402 3.6 -21.1 55.2 -0.04 |
JPL | 0.050 0.011 0.067 -0.3 0.7 0.8 -0.16 |
mit | -0.208 0.210 0.046 -0.4 -0.9 6.6 -0.30 |
ncl | 0.032 0.021 0.077 1.7 0.2 0.5 -0.08 |
itr | -0.163 0.264 0.056 -0.3 -0.6 14.9 -1.47 |
---------------|---------------------------------------------------------------|
5-3-2) Sigmas :
==================
Solution | R X R Y R Z T X T Y T Z SCL |
| (mas) (mas) (mas) (mm) (mm) (mm) (ppb) |
---------------|---------------------------------------------------------------|
cod | 0.067 0.073 0.074 1.8 1.8 1.8 0.28 |
emr | 0.077 0.079 0.083 2.0 2.0 2.0 0.31 |
esa | 0.072 0.072 0.078 1.9 1.8 1.8 0.29 |
gfz | 0.075 0.078 0.075 2.0 2.0 1.9 0.30 |
jpl | 0.084 0.086 0.088 2.2 2.2 2.2 0.34 |
ngs | 0.064 0.067 0.068 1.7 1.7 1.6 0.26 |
sio | 0.068 0.072 0.070 1.8 1.8 1.7 0.27 |
JPL | 0.069 0.073 0.070 1.8 1.8 1.8 0.28 |
mit | 0.067 0.069 0.071 1.8 1.7 1.7 0.27 |
ncl | 0.069 0.074 0.070 1.8 1.8 1.8 0.28 |
itr | 0.060 0.062 0.064 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 | -0.8 -9.3 9.1 | 5.1 5.0 7.3 |
---------------|---------------------------|---------------------------|
5-5) ERP Residuals Weighted Average & R.M.S. :
===================================================
5-5-1) Weighted Average :
============================
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- -13.3 .8 .0 -.3 -1.7 |
emr | --- -34.3 5.1 64.2 -8.0 -63.8 |
esa | --- -6.5 2.1 -5.0 -16.0 -.6 |
gfz | --- 13.1 .5 -1.7 -.6 .1 |
jpl | --- -16.0 -7.6 31.2 1.3 -24.0 |
ngs | --- 239.0 16.2 -43.5 18.6 -13.6 |
sio | --- 6.2 -.9 -18.7 12.7 5.6 |
JPL | --- --- --- --- --- --- |
mit | --- -21.3 -37.4 .0 44.4 -.8 |
ncl | --- --- --- --- --- --- |
itr | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
---------------|------------------------------------------------------------|
5-5-2) R.M.S. :
==================
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 21.0 3.1 11.0 6.2 16.6 |
emr | --- 37.9 11.4 70.5 19.8 69.5 |
esa | --- 18.0 15.8 46.6 29.7 77.9 |
gfz | --- 18.5 2.6 5.8 4.6 8.7 |
jpl | --- 23.9 9.1 33.5 6.0 29.6 |
ngs | --- 306.9 18.0 92.4 26.1 104.9 |
sio | --- 18.6 6.7 22.5 14.7 10.2 |
JPL | --- --- --- --- --- --- |
mit | --- 34.9 37.4 1.3 44.3 3.9 |
ncl | --- --- --- --- --- --- |
itr | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Threshold set at 5 sigmas
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF96_IGS_RS47.snx esa10207.snx |GODE A ----| 5.7 -25.2 -41.4|
ITRF96_IGS_RS47.snx esa10207.snx |MADR A ----| 14.3 -38.4 29.5|
| | |
ITRF96_IGS_RS47.snx gfz10207.snx |KERG A ----| -6.8 -19.8 7.9|
ITRF96_IGS_RS47.snx gfz10207.snx |MAC1 A ----| 1.6 21.5 11.7|
| | |
ITRF96_IGS_RS47.snx jpl10207.snx |MADR A ----| 25.5 -36.9 13.6|
| | |
ITRF96_IGS_RS47.snx jpl10207.snx |MAC1 A ----| 4.1 22.1 11.6|
| | |
ITRF96_IGS_RS47.snx sio10207.snx |MADR A ----| 14.9 -36.9 22.1|
| | |
ITRF96_IGS_RS47.snx JPL1020g.snx |MADR A ----| 16.7 -36.5 25.3|
| | |
ITRF96_IGS_RS47.snx JPL1020g.snx |GODE A ----| 3.2 -19.7 -24.8|
ITRF96_IGS_RS47.snx JPL1020g.snx |KERG A ----| -5.4 -23.9 7.2|
ITRF96_IGS_RS47.snx JPL1020g.snx |MAC1 A ----| 3.7 24.0 8.8|
| | |
ITRF96_IGS_RS47.snx mit1020g.snx |MADR A ----| 16.3 -37.1 22.4|
| | |
ITRF96_IGS_RS47.snx ncl1020g.snx |GODE A ----| 1.4 -15.0 -7.3|
ITRF96_IGS_RS47.snx ncl1020g.snx |KERG A ----| -5.4 -22.8 6.0|
ITRF96_IGS_RS47.snx ncl1020g.snx |MAC1 A ----| 2.0 21.1 4.2|
| | |
IGS99P29.snx JPL1020g.snx |YAKA A ----| -20.3 9.2 -19.3|
| | |
IGS99P29.snx ncl1020g.snx |YAKA A ----| -20.8 9.3 -18.2|
| | |
IGS99P29.snx igs99P1020.snx |MADR A ----| 22.3 -25.5 1.4|
IGS99P29.snx igs99P1020.snx |YAKA A ----| -19.3 9.9 -14.2|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio
============= ====== ====== ====== ====== ====== ====== ======
50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
12309M002 MDVO A MDVO B MDVO A
40405S031 GOL2 A GOLD A GOLD A GOL2 A GOL2 A GOLD B GOL2 A
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ B AREQ A
50103M108 TID2 A TIDB A TIDB A TID2 A TID2 A TIDB A TID2 A
30302M007 HARK A HART B HARK A HART B
30302???? HARK A
13407S012 MADR A MAD2 A MADR A MAD2 A
22306M002 IISC B IISC A IISC A IISC B IISC A
22601M001 NTUS A NTUS A NTUS A NTUS A
22601M002 NTUS A
42005M001 GALA A GALA A GALA B GALA A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT SIO:
-----------------------------
GILB A KABR A
IERS DOMES NO JPL mit ncl
============= ====== ====== ======
40405S031 GOL2 A GOLD A GOL2 A
GOLD A GOL2 A
13407S012 MAD2 A MAD2 A
MADR A MADR A
12309M002 MDVO A
12309M001 MDVO A
40114M001 NRC1 A NRC1 A NRC1 A
NRC2 A
50103M108 TID2 A TIDB A TID2 A
TIDB A TID2 A TIDB A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
INEG A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
NRC2 A BISH A GILB A KABR A
--
[Mailed From: Remi Ferland <ferland at geod.nrcan.gc.ca>]
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