[IGSREPORT-7530] Wk 1076 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Sep 7 12:17:09 PDT 2000
******************************************************************************
IGS Electronic Report 07 Sep 12:17:14 PDT 2000 Message Number 7530
******************************************************************************
Author: R. Ferland, D. Hutchison
===================================================================
Combined AC solution for GPS week 1076 - 00/08/20 to 00/08/26
===================================================================
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
igs00P1076.snx Combined weekly solution.
igs00P1076.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS00P34.snx Cumulative Combined solution.
igs00P1076.sum This file.
igs00P1076.itr Residuals between the AC and the IGS97 for the RF stations.
igs00P1076.res Residuals between the AC and the Combined Weekly solution.
IGS00P34.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
IGS97 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS00P04_RS51.SNX.Z
3-4) The AC are compared to IGS97, 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 IGS97 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGS97 of the reference epoch
using a 14-parameters transformation and the 51 ITRF station positions
and velocities. The IGS97 is a realization of ITRF97.
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 = IGS00P04_RS51.SNX
igs = igs00P1076.snx
IGS = IGS00P34.snx
JPL = jpl1076g.snx
jpl = jpl10767.snx
BuA = IERS Bulletin A
JPL mit ncl are used to quality control the weekly combination.
emr gfz ngs sio excluded from the geocenter estimation (Sec. 5-4).
4-1) Starting with GPS week 1065, the solutions are aligned to the
IGS00P04_RS51.SNX realization of ITRF97.
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 | 131 | 45 | 41.032 | 1.000 | 41.029 |
emr | 46 | 32 | 2.668 | 1.000 | 2.668 |
esa | 50 | 36 | 10.463 | 1.000 | 10.462 |
gfz | 76 | 37 | 17.978 | 1.000 | 17.976 |
jpl | 56 | 27 | 4.239 | 1.000 | 4.238 |
ngs | 72 | 46 | 22.694 | 1.000 | 22.693 |
sio | 133 | 44 | 2.145 | 1.000 | 2.144 |
JPL | 147 | 47 | 2.684 | 1.000 | 2.684 |
mit | 154 | 44 | 4.376 | 0.956 | 4.184 |
ncl | 94 | 47 | 2.338 | 1.000 | 2.338 |
igs | 140 | 47 | 1.547 | 1.000 | 1.547 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to the IGS97 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 44 | 0.0 0.1 -0.3 | 3.3 3.1 12.4 |
emr 31 | -0.2 -0.2 -1.8 | 3.7 5.0 12.5 |
esa 35 | 0.7 0.8 0.3 | 6.5 7.4 12.7 |
gfz 36 | 0.9 -0.1 0.0 | 2.2 3.1 10.3 |
jpl 26 | -0.8 0.2 -0.6 | 2.3 3.0 12.1 |
ngs 45 | -0.8 -0.2 -0.8 | 7.1 6.3 11.8 |
sio 43 | -0.4 -0.4 -1.2 | 3.3 3.8 10.5 |
JPL 46 | 0.6 -0.1 -0.8 | 2.3 2.7 9.8 |
mit 43 | 0.7 -0.1 -1.1 | 2.1 2.4 9.4 |
ncl 46 | 0.3 -0.4 -0.4 | 2.2 3.0 8.2 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 126 | -0.7 0.5 1.1 | 2.3 2.1 9.6 |
emr 44 | -0.1 0.4 0.2 | 3.6 3.8 6.4 |
esa 50 | 0.6 1.4 0.7 | 5.2 7.2 9.8 |
gfz 71 | 0.8 0.0 0.8 | 1.6 1.7 5.7 |
jpl 51 | -1.0 0.8 1.1 | 1.6 1.7 5.8 |
ngs 71 | -0.8 -0.7 0.1 | 7.7 6.4 8.9 |
sio 121 | -0.7 0.1 1.2 | 2.0 2.7 5.4 |
JPL 136 | 0.3 -0.1 0.6 | 1.0 0.8 5.4 |
mit 130 | 0.5 0.2 0.2 | 1.3 0.9 3.6 |
ncl 90 | 0.2 -0.2 0.9 | 1.0 1.2 4.0 |
ITR 46 | -0.2 0.2 -0.4 | 2.1 2.9 10.4 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 126 | -0.4 0.6 -2.4 | 4.1 4.5 12.2 |
emr 44 | -0.3 0.4 -0.7 | 4.2 4.9 11.0 |
esa 50 | 0.6 1.9 -0.8 | 6.6 7.8 12.5 |
gfz 71 | 1.0 0.2 -0.6 | 2.0 3.3 9.7 |
jpl 51 | -0.8 1.0 0.6 | 2.0 2.9 9.7 |
ngs 71 | -0.8 -0.6 -0.7 | 7.3 7.9 10.5 |
sio 121 | -0.6 0.3 -1.9 | 3.0 4.1 8.9 |
JPL 136 | 0.3 0.3 -2.1 | 2.5 3.3 8.9 |
mit 130 | 0.6 0.2 -2.4 | 2.4 2.6 8.2 |
ncl 90 | 0.3 0.0 0.2 | 2.1 2.9 7.2 |
igs 140 | 0.2 0.1 -2.5 | 2.5 3.6 7.8 |
ITR 51 | -0.1 0.1 -0.2 | 0.8 1.1 3.3 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS00P04_RS51.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 | 0.011 -0.010 0.012 -1.7 6.3 -8.8 3.02 |
emr | -0.055 0.021 -0.022 5.6 5.1 -41.7 2.21 |
esa | 0.071 0.030 -0.017 -0.9 2.4 3.9 1.14 |
gfz | -0.058 0.017 -0.038 0.0 0.5 -1.7 1.08 |
jpl | -0.033 -0.055 -0.006 -10.2 6.5 -24.9 1.90 |
ngs | 0.024 -0.073 0.126 4.8 12.0 23.3 1.61 |
sio | 0.102 0.135 0.002 3.6 12.9 50.8 1.80 |
JPL | 0.010 -0.021 0.080 0.4 1.1 -4.0 2.19 |
mit | -0.004 -0.005 -0.004 -0.0 -0.0 -1.5 1.99 |
ncl | -0.114 0.030 -0.263 13.6 -4.9 -10.2 1.58 |
---------------|---------------------------------------------------------------|
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 0.061 0.066 1.6 1.6 1.5 0.24 |
emr | 0.073 0.073 0.078 1.9 1.9 1.9 0.29 |
esa | 0.070 0.067 0.073 1.8 1.8 1.7 0.27 |
gfz | 0.066 0.066 0.074 1.7 1.7 1.7 0.27 |
jpl | 0.076 0.077 0.086 2.0 2.0 2.0 0.31 |
ngs | 0.059 0.061 0.066 1.5 1.5 1.5 0.24 |
sio | 0.061 0.061 0.067 1.6 1.6 1.6 0.24 |
JPL | 0.059 0.060 0.066 1.5 1.5 1.5 0.24 |
mit | 0.061 0.062 0.069 1.6 1.6 1.6 0.25 |
ncl | 0.059 0.060 0.066 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 | -5.2 3.5 -17.0 | 7.4 7.5 9.4 |
---------------|---------------------------|---------------------------|
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 1.1 1.5 -1.1 2.0 |
emr | --- 2.8 -2.7 3.3 -2.7 5.5 |
esa | --- -2.4 -13.3 1.7 -8.9 -.6 |
gfz | --- 10.9 9.1 -.6 2.4 -.5 |
jpl | --- -13.4 3.2 -6.3 3.7 1.6 |
ngs | --- 19.4 -26.7 -47.3 31.3 43.1 |
sio | --- -4.0 -.3 1.3 -8.1 -5.5 |
JPL | --- --- --- --- --- --- |
mit | --- 19.5 -3.5 -.6 -.6 -.7 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- -7.1 -2.8 .7 32.5 3.8 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 6.5 5.2 12.4 4.6 22.7 |
emr | --- 16.7 13.4 31.5 7.4 41.7 |
esa | --- 11.6 11.3 32.2 4.4 25.6 |
gfz | --- 14.9 3.7 11.4 3.4 8.6 |
jpl | --- 28.2 7.5 12.9 4.2 27.7 |
ngs | --- 177.7 35.4 61.9 8.7 131.1 |
sio | --- 7.8 4.6 9.5 6.6 8.2 |
JPL | --- --- --- --- --- --- |
mit | --- 4.9 1.7 5.4 1.4 3.9 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 14.6 7.6 11.5 7.9 12.8 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
esa10767.snx sio10767.snx |EISL A ----| 0.0 -3.0 60.4|
| | |
ngs10767.snx sio10767.snx |BAKO A ----| 6.9 -3.9 -59.1|
ngs10767.snx sio10767.snx |EISL A ----| 24.4 33.8 59.2|
| | |
IGS00P33.snx emr10767.snx |ARTU A ----| 5.1 0.8 -35.9|
| | |
IGS00P33.snx gfz10767.snx |COCO A ----| 8.7 -36.4 0.8|
| | |
IGS00P33.snx jpl10767.snx |COCO A ----| 7.1 -32.7 7.8|
| | |
IGS00P33.snx jpl10767.snx |ARTU A ----| 0.2 -2.3 -32.6|
| | |
IGS00P33.snx sio10767.snx |ANKR A ----| -10.9 17.7 -17.1|
IGS00P33.snx sio10767.snx |COCO A ----| 8.4 -32.5 3.5|
IGS00P33.snx sio10767.snx |LAMA A ----| 18.7 -3.8 -8.5|
| | |
IGS00P33.snx JPL1076g.snx |COCO A ----| 8.0 -33.2 9.4|
| | |
IGS00P33.snx JPL1076g.snx |LAMA A ----| 20.7 -10.9 -13.8|
| | |
IGS00P33.snx mit1076g.snx |COCO A ----| 8.7 -33.7 8.7|
| | |
IGS00P33.snx mit1076g.snx |ANKR A ----| -8.9 17.5 -17.5|
IGS00P33.snx mit1076g.snx |LAMA A ----| 21.0 -9.6 -13.2|
IGS00P33.snx mit1076g.snx |RAMO A ----| 6.3 18.6 -17.1|
| | |
IGS00P33.snx ncl1076g.snx |COCO A ----| 7.5 -35.6 11.5|
| | |
IGS00P33.snx ncl1076g.snx |ANKR A ----| -9.0 15.8 -18.5|
IGS00P33.snx ncl1076g.snx |ARTU A ----| 3.2 -2.1 -29.1|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42005M001 GALA A GALA B GALA A GALA B GALA A GALA A GALA A
31303M002 MAS1 A MAS1 A MASP A MAS1 A MAS1 A MAS1 A MAS1 A MAS1 A
22306M002 IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
12353M001 YAKZ A YAKZ A YAKZ A YAKZ A YAKA A YAKA A
13407S012 MADR A MADR A MAD2 A MADR A MAD2 A MADR A MADR A
40405S031 GOLD A GOL2 A GOLD A GOL2 A GOL2 A GOLD A GOLD A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
50103M108 TIDB A TID2 A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
IERS DOMES NO JPL mit ncl IGS igs
============= ====== ====== ====== ====== ======
40405S031 GOL2 A GOLD A GOL2 A GOLD A GOLD A
GOLD A GOL2 A
13407S012 MAD2 A MADR A MADR A MADR A MADR A
MADR A MAD2 A
31303M002 MAS1 A MAS1 A MAS1 A MAS1 A
31303M001 MAS1 A
12309M002 MDVO A MDVO A MDVO A
12309M001 MDVO A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A NRC2 A
50103M108 TID2 A TIDB A TID2 A TIDB A TIDB A
TIDB A TID2 A TIDB A
12353M001 YAKZ A YAKZ A YAKZ A YAKA A YAKA A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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