[IGSREPORT-7497] Wk 1075 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Aug 31 19:28:59 PDT 2000
******************************************************************************
IGS Electronic Report 31 Aug 19:29:07 PDT 2000 Message Number 7497
******************************************************************************
Author: R. Ferland
===================================================================
Combined AC solution for GPS week 1075 - 00/08/13 to 00/08/19
===================================================================
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
igs00P1075.snx Combined weekly solution.
igs00P1075.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS00P33.snx Cumulative Combined solution.
igs00P1075.sum This file.
igs00P1075.itr Residuals between the AC and the IGS97 for the RF stations.
igs00P1075.res Residuals between the AC and the Combined Weekly solution.
IGS00P33.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 = igs00P1075.snx
IGS = IGS00P33.snx
JPL = jpl1075g.snx
jpl = jpl10757.snx
BuA = IERS Bulletin A
JPL mit 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 | 132 | 45 | 38.270 | 1.000 | 38.277 |
emr | 46 | 36 | 2.541 | 1.000 | 2.542 |
esa | 45 | 35 | 10.255 | 1.000 | 10.256 |
gfz | 73 | 38 | 18.213 | 1.000 | 18.218 |
jpl | 71 | 31 | 3.989 | 1.000 | 3.990 |
ngs | 69 | 46 | 23.159 | 1.000 | 23.163 |
sio | 137 | 44 | 2.163 | 1.000 | 2.164 |
JPL | 149 | 47 | 2.729 | 1.000 | 2.730 |
mit | 157 | 44 | 4.791 | 0.913 | 4.376 |
igs | 135 | 47 | 1.313 | 0.998 | 1.310 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 0.3 0.3 0.0 | 3.7 3.0 13.1 |
emr 32 | -0.3 0.2 -2.7 | 2.6 3.8 11.3 |
esa 32 | 0.3 -0.4 -0.5 | 5.8 5.4 13.0 |
gfz 37 | 0.7 -0.4 -1.0 | 2.6 3.1 9.7 |
jpl 30 | -0.3 -0.2 -1.4 | 2.3 3.5 11.9 |
ngs 42 | 1.3 -0.7 -0.5 | 5.6 7.3 11.8 |
sio 43 | -0.8 -0.6 -2.1 | 3.2 4.1 11.0 |
JPL 46 | 0.4 -0.1 -1.0 | 2.6 2.4 9.6 |
mit 43 | 0.7 -0.3 -1.4 | 2.4 2.1 9.0 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 121 | 0.1 0.8 1.0 | 2.6 2.4 11.2 |
emr 44 | -0.3 0.3 -1.8 | 2.9 4.2 4.6 |
esa 45 | 0.4 -0.3 1.2 | 4.7 4.6 8.8 |
gfz 68 | 1.1 -0.4 -0.3 | 1.8 2.1 6.0 |
jpl 65 | -0.5 -0.2 0.0 | 1.3 2.1 6.9 |
ngs 66 | 1.5 -1.1 0.3 | 6.2 7.4 10.0 |
sio 120 | -1.0 -0.2 0.0 | 2.0 3.1 6.7 |
JPL 133 | 0.3 0.1 0.5 | 1.0 0.8 5.5 |
mit 128 | 0.6 0.2 0.0 | 1.3 0.9 4.3 |
ITR 46 | -0.1 0.2 -0.5 | 2.3 2.7 10.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 125 | 0.0 1.0 -1.8 | 4.2 4.6 13.4 |
emr 44 | -0.5 0.1 -2.2 | 3.4 4.7 8.6 |
esa 45 | 0.0 0.5 0.3 | 5.9 5.8 12.3 |
gfz 69 | 0.9 -0.1 -1.9 | 2.5 3.1 9.8 |
jpl 66 | -0.2 0.0 -1.1 | 2.1 3.1 10.5 |
ngs 68 | 1.5 -1.1 -1.0 | 6.2 8.4 11.2 |
sio 123 | -1.1 0.1 -2.5 | 3.5 4.1 8.9 |
JPL 136 | 0.1 0.5 -1.9 | 3.0 3.0 9.0 |
mit 131 | 0.6 0.4 -2.2 | 3.0 2.7 8.2 |
igs 135 | -0.3 0.2 -2.0 | 2.2 2.3 7.0 |
ITR 51 | -0.1 0.1 -0.2 | 0.8 1.1 3.2 |
---------------|---------------------------|---------------------------|
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 | 0.010 -0.005 0.007 -0.4 0.0 0.3 3.10 |
emr | -0.141 0.024 -0.086 -3.3 -11.1 -0.8 2.56 |
esa | 0.129 0.073 -0.026 -11.3 12.9 5.2 0.58 |
gfz | -0.048 0.006 -0.026 -0.4 0.9 -2.1 1.28 |
jpl | -0.012 -0.036 0.002 -2.9 5.5 -17.4 2.17 |
ngs | -0.140 0.042 0.106 0.0 -1.1 38.2 3.07 |
sio | 0.056 0.175 -0.002 0.7 10.2 47.4 2.13 |
JPL | 0.010 0.002 0.070 -1.0 1.4 -3.7 2.34 |
mit | -0.005 -0.009 -0.008 -0.1 -0.2 -1.4 2.12 |
---------------|---------------------------------------------------------------|
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 0.072 0.083 1.9 1.9 1.8 0.29 |
esa | 0.075 0.071 0.079 1.9 1.9 1.8 0.29 |
gfz | 0.066 0.065 0.072 1.7 1.7 1.7 0.26 |
jpl | 0.072 0.073 0.077 1.8 1.8 1.8 0.29 |
ngs | 0.063 0.063 0.071 1.6 1.6 1.6 0.25 |
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 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -0.4 3.0 -8.4 | 6.0 6.1 7.8 |
---------------|---------------------------|---------------------------|
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 | --- -8.0 -10.0 .8 -9.0 -.7 |
emr | --- 32.2 3.0 6.0 9.3 -12.5 |
esa | --- -7.4 -9.0 .0 -27.8 1.5 |
gfz | --- 5.7 11.7 .1 -2.9 -.5 |
jpl | --- -25.3 .3 10.8 1.9 -4.5 |
ngs | --- 10.1 -2.5 -108.5 30.5 36.9 |
sio | --- 2.6 7.5 -15.8 4.7 4.5 |
JPL | --- --- --- --- --- --- |
mit | --- -16.9 .8 -.2 1.9 -.4 |
ITR | --- --- --- --- --- --- |
BuA | --- -14.9 6.6 -1.7 24.7 1.9 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 13.1 3.1 7.8 4.1 13.8 |
emr | --- 20.8 7.8 28.9 8.4 16.8 |
esa | --- 9.2 2.8 14.1 4.2 12.0 |
gfz | --- 7.6 4.0 10.7 4.0 9.3 |
jpl | --- 15.6 5.1 25.8 5.9 20.2 |
ngs | --- 200.2 26.1 44.2 14.5 54.7 |
sio | --- 7.6 3.9 17.5 3.1 11.9 |
JPL | --- --- --- --- --- --- |
mit | --- 57.7 2.1 2.6 1.9 5.4 |
ITR | --- --- --- --- --- --- |
BuA | --- 9.0 7.2 12.0 6.8 16.1 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
cod10757.snx ngs10757.snx |DGAR A ----| 2.2 -4.4 -51.7|
| | |
cod10757.snx sio10757.snx |USUD A ----| 7.1 1.6 54.7|
| | |
emr10757.snx esa10757.snx |AREQ A ----| 18.8 1.9 50.8|
emr10757.snx esa10757.snx |SANT A ----| 23.9 0.8 58.5|
| | |
emr10757.snx ngs10757.snx |DGAR A ----| 0.7 3.4 -56.9|
emr10757.snx ngs10757.snx |MALI A ----| 20.2 -53.8 -18.9|
| | |
esa10757.snx ngs10757.snx |AREQ A ----| -25.8 1.2 -50.5|
esa10757.snx ngs10757.snx |SANT A ----| -38.8 -3.0 -63.1|
| | |
esa10757.snx ngs10757.snx |LPGS A ----| -42.9 7.3 -54.1|
| | |
IGS00P32.snx emr10757.snx |ARTU A ----| 6.8 1.6 -35.6|
| | |
IGS00P32.snx gfz10757.snx |COCO A ----| 9.5 -38.5 4.7|
| | |
IGS00P32.snx jpl10757.snx |COCO A ----| 7.3 -32.3 13.2|
| | |
IGS00P32.snx jpl10757.snx |ARTU A ----| 2.7 -1.0 -35.8|
IGS00P32.snx jpl10757.snx |ISTA A ----| 6.5 23.1 -76.3|
| | |
IGS00P32.snx sio10757.snx |ANKR A ----| -12.9 18.1 -12.8|
IGS00P32.snx sio10757.snx |COCO A ----| 8.3 -37.0 2.3|
| | |
IGS00P32.snx JPL1075g.snx |COCO A ----| 8.1 -34.2 11.5|
| | |
IGS00P32.snx JPL1075g.snx |ISTA A ----| 5.9 23.8 -78.5|
| | |
IGS00P32.snx mit1075g.snx |COCO A ----| 8.8 -35.8 10.2|
| | |
IGS00P32.snx mit1075g.snx |ANKR A ----| -10.2 17.5 -13.5|
IGS00P32.snx mit1075g.snx |ISTA A ----| 5.8 23.9 -78.6|
| | |
IGS00P32.snx igs00P1075.snx |COCO A ----| 6.8 -35.6 5.7|
IGS00P32.snx igs00P1075.snx |LAMA A ----| 15.5 -6.5 -12.2|
IGS00P32.snx igs00P1075.snx |MADR A ----| 3.3 9.3 -2.0|
IGS00P32.snx igs00P1075.snx |RAMO A ----| 6.5 17.8 -11.3|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
50103M108 TIDB A TID2 A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
42005M001 GALA A GALA B GALA A GALA A GALA B GALA A GALA A GALA A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
31303M002 MAS1 A MAS1 A MASP A MAS1 A MAS1 A MAS1 A MAS1 A MAS1 A MAS1 A
13407S012 MADR A MADR A MAD2 A MADR A MAD2 A MADR A
12353M001 YAKZ A YAKZ A YAKZ A YAKZ A YAKA A YAKA A
40405S031 GOLD A GOL2 A GOL2 A GOLD A GOL2 A GOL2 A GOLD A GOLD A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
50107M004 YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A
22306M002 IISC A IISC A IISC B IISC A IISC B IISC A IISC A IISC A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
IERS DOMES NO JPL mit IGS igs
============= ====== ====== ====== ======
40405S031 GOL2 A GOLD A GOLD A GOLD A
GOLD A GOL2 A
13407S012 MAD2 A MADR A MADR A
MADR A MAD2 A
31303M002 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
NRC2 A NRC2 A
50103M108 TID2 A TIDB A TIDB A TIDB A
TIDB A TID2 A
12353M001 YAKZ A YAKZ A YAKA A YAKA A
50107M004 YAR1 A YAR1 A YAR1 A YAR1 A
YAR2 A YAR2 A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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