[IGSREPORT-6274] Wk 1013 Preliminary IGS SINEX Combination
R.
R.
Sat Jul 17 12:29:34 PDT 1999
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IGS Electronic Report Sat Jul 17 12:29:34 PDT 1999 Message Number 6274
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Author: R. Ferland , D. Hutchison
Subject: Wk 1013 Preliminary IGS SINEX Combination
===================================================================
Combined AC solution for GPS week 1013 - 99/06/06 to 99/06/12
===================================================================
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
igs99P1013.snx Combined weekly solution.
igs99P1013.erp Daily Earth Rotation Parameters.
IGS99P23.snx Cumulative Combined solution.
igs99P1013.sum This file.
igs99P1013.itr Residuals between the AC and the ITRF96 for the RF stations.
igs99P1013.res Residuals between the AC and the Combined Weekly solution.
IGS99P23.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 = igs99P1013.snx
IGS = IGS99P23.snx
JPL = jpl1013g.snx
jpl = jpl10137.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).
mit matrix was not used.
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 | 116 | 38 | 33.791 | 1.000 | 33.781 |
emr | 43 | 25 | 6.551 | 1.001 | 6.559 |
esa | 55 | 35 | 7.057 | 1.000 | 7.057 |
gfz | 67 | 33 | 24.022 | 1.000 | 24.024 |
jpl | 60 | 23 | 4.148 | 1.000 | 4.148 |
ngs | 70 | 42 | 37.944 | 1.002 | 38.009 |
sio | 164 | 38 | 2.193 | 1.000 | 2.192 |
JPL | 128 | 40 | 2.070 | 1.256 | 2.600 |
mit | 182 | 40 | 4.906 | 1.000 | 4.906 |
ncl | 88 | 39 | 2.349 | 1.192 | 2.801 |
itr | 52 | 48 | 10.000 | 0.346 | 3.462 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 1.4 -1.4 0.5 | 5.1 7.5 12.5 |
emr | -0.2 -1.7 -0.8 | 8.4 17.1 13.9 |
esa | -0.6 -0.4 0.8 | 4.8 9.3 17.0 |
gfz | 0.2 -0.7 0.2 | 5.1 5.7 10.0 |
jpl | 1.0 0.2 -0.1 | 6.2 7.8 8.3 |
ngs | -0.8 0.7 0.3 | 11.9 14.3 15.5 |
sio | -1.5 -0.6 -0.6 | 5.0 8.4 12.4 |
JPL | 0.3 -1.3 1.3 | 4.6 7.2 11.2 |
mit | 0.6 -0.4 0.2 | 4.1 6.4 6.8 |
ncl | 0.7 -0.5 0.0 | 4.2 5.4 5.3 |
itr | -0.3 0.0 -0.5 | 4.3 6.3 9.3 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to Weekly Combination:
============================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 1.5 -0.7 -0.3 | 2.7 2.9 12.1 |
emr | -0.5 -0.7 -0.9 | 6.2 12.4 12.4 |
esa | -0.3 -0.7 0.8 | 3.9 4.9 9.3 |
gfz | 0.4 0.3 -1.6 | 2.5 2.5 7.2 |
jpl | 2.3 0.9 1.1 | 4.2 3.5 7.2 |
ngs | -1.3 1.5 -1.0 | 11.3 13.4 13.2 |
sio | -1.3 -0.2 -1.6 | 2.0 3.6 6.8 |
JPL | 0.7 -0.9 0.8 | 1.8 3.2 5.8 |
mit | 0.9 0.2 -0.1 | 2.0 1.6 7.0 |
ncl | 1.1 0.4 -0.4 | 1.6 1.5 5.3 |
itr | 0.5 0.2 -1.4 | 2.8 3.6 10.3 |
ITR | 0.3 0.9 -1.1 | 4.6 7.5 12.5 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to Cumulative Combination:
================================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 0.8 -1.0 -1.0 | 3.6 3.7 14.8 |
emr | -0.7 -0.9 -1.8 | 7.4 13.4 16.6 |
esa | -0.5 -1.6 0.3 | 5.3 5.3 12.4 |
gfz | 0.5 -0.5 -1.4 | 2.9 3.4 9.5 |
jpl | 2.4 0.2 -0.5 | 4.2 4.8 11.0 |
ngs | -1.2 0.4 -1.5 | 10.8 14.6 15.6 |
sio | -1.9 -0.2 -2.3 | 3.5 5.0 9.6 |
JPL | 0.2 -1.2 0.2 | 2.6 4.4 10.2 |
mit | 0.3 0.1 -0.5 | 2.8 3.1 11.0 |
ncl | 0.9 -0.2 -0.6 | 2.6 2.7 9.4 |
itr | 0.4 0.3 -1.0 | 2.8 3.1 9.5 |
igs | -0.6 -0.2 -0.6 | 2.6 2.9 7.6 |
ITR | 0.5 0.9 -0.8 | 5.7 7.8 13.8 |
---------------|---------------------------|---------------------------|
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 | -0.046 0.003 -0.021 7.5 -3.2 3.7 1.82 |
emr | -0.025 0.039 0.046 27.6 -64.8 222.7 1.27 |
esa | -0.010 -0.002 0.038 2.4 -15.2 17.1 -0.65 |
gfz | -0.006 0.043 0.005 0.0 0.4 0.2 -0.14 |
jpl | 0.104 0.012 0.009 8.8 -10.6 19.6 0.72 |
ngs | -0.017 0.053 -0.020 7.6 3.9 56.9 -0.17 |
sio | 0.339 -0.322 2.706 8.0 -14.3 107.8 0.60 |
JPL | 0.001 0.082 0.016 -0.1 0.6 -0.6 0.31 |
mit | -0.048 0.004 0.011 0.8 -1.3 -1.1 0.40 |
ncl | 0.000 -0.019 0.014 2.1 -0.7 -0.8 0.21 |
itr | -0.161 0.262 0.057 -0.4 -0.6 14.6 -1.44 |
---------------|---------------------------------------------------------------|
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 | 0.068 0.073 0.071 1.8 1.8 1.7 0.27 |
emr | 0.085 0.083 0.089 2.2 2.2 2.1 0.33 |
esa | 0.071 0.072 0.074 1.8 1.8 1.8 0.28 |
gfz | 0.075 0.078 0.075 2.0 2.0 1.9 0.30 |
jpl | 0.086 0.092 0.085 2.2 2.2 2.2 0.34 |
ngs | 0.066 0.069 0.068 1.7 1.7 1.7 0.26 |
sio | 0.068 0.072 0.070 1.8 1.8 1.7 0.27 |
JPL | 0.068 0.071 0.068 1.8 1.8 1.7 0.27 |
mit | 0.068 0.070 0.070 1.8 1.8 1.7 0.27 |
ncl | 0.069 0.073 0.069 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 | 5.1 -8.9 15.6 | 4.8 4.7 7.0 |
---------------|---------------------------|---------------------------|
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 | --- 2.2 6.5 -.5 2.0 .3 |
emr | --- -26.6 1.4 118.7 -6.1 -33.7 |
esa | --- -13.6 -14.9 2.7 -8.4 .0 |
gfz | --- 14.3 12.5 -2.8 8.1 -2.0 |
jpl | --- -21.2 -3.9 -8.3 .1 24.7 |
ngs | --- -320.9 .1 -91.6 20.6 13.4 |
sio | --- 20.1 1.7 -12.6 1.6 14.7 |
JPL | --- --- --- --- --- --- |
mit | --- -5.2 -19.7 -.5 4.6 -.4 |
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 | --- 12.8 7.6 12.9 4.5 12.6 |
emr | --- 32.3 7.5 120.1 8.8 47.7 |
esa | --- 17.7 15.2 15.8 9.4 9.2 |
gfz | --- 17.5 12.9 6.5 9.7 10.5 |
jpl | --- 22.9 5.3 13.4 4.0 27.1 |
ngs | --- 351.5 10.1 101.0 23.0 45.8 |
sio | --- 23.3 5.6 16.8 5.6 19.7 |
JPL | --- --- --- --- --- --- |
mit | --- 5.5 19.7 2.2 4.8 1.8 |
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 esa10137.snx |MADR A ----| 15.6 -34.3 29.3|
| | |
ITRF96_IGS_RS47.snx gfz10137.snx |MAC1 A ----| 0.8 19.8 5.7|
| | |
ITRF96_IGS_RS47.snx jpl10137.snx |MADR A ----| 24.6 -39.7 23.0|
| | |
ITRF96_IGS_RS47.snx jpl10137.snx |MAC1 A ----| 1.6 23.1 4.4|
| | |
ITRF96_IGS_RS47.snx sio10137.snx |MADR A ----| 13.8 -35.4 12.2|
| | |
ITRF96_IGS_RS47.snx JPL1013g.snx |MAC1 A ----| 4.5 25.4 4.4|
ITRF96_IGS_RS47.snx JPL1013g.snx |MADR A ----| 15.6 -39.9 22.2|
| | |
ITRF96_IGS_RS47.snx JPL1013g.snx |GODE A ----| 5.0 -17.0 -16.4|
| | |
ITRF96_IGS_RS47.snx mit1013g.snx |MADR A ----| 15.0 -38.3 16.3|
| | |
ITRF96_IGS_RS47.snx ncl1013g.snx |MAC1 A ----| 2.8 20.4 1.2|
| | |
sio10137.snx mit1013g.snx |PIN2 A ----| 2.7 0.9 135.4|
sio10137.snx mit1013g.snx |ROCH A ----| 2.6 0.9 -198.8|
| | |
IGS99P22.snx sio10137.snx |PRDS A ----| -5.1 4.5 -62.5|
IGS99P22.snx sio10137.snx |YAKA A ----| -21.4 6.1 -12.6|
| | |
IGS99P22.snx JPL1013g.snx |YAKA A ----| -20.6 6.3 -24.5|
| | |
IGS99P22.snx mit1013g.snx |YAKA A ----| -20.8 6.7 -20.6|
| | |
IGS99P22.snx igs99P1013.snx |CAT1 A ----| -3.0 14.4 -1.3|
IGS99P22.snx igs99P1013.snx |CIT1 A ----| 1.0 12.9 2.6|
IGS99P22.snx igs99P1013.snx |MADR A ----| 18.8 -28.0 -4.1|
IGS99P22.snx igs99P1013.snx |WES2 A ----| 10.3 -10.2 -0.2|
IGS99P22.snx igs99P1013.snx |YAKA A ----| -21.5 7.4 -29.4|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
[Mailed From: Remi Ferland <ferland at geod.nrcan.gc.ca>]
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