[IGSREPORT-7335] Wk 1067 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Jul 6 13:16:31 PDT 2000
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IGS Electronic Report 06 Jul 13:16:35 PDT 2000 Message Number 7335
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Author: R. Ferland
===================================================================
Combined AC solution for GPS week 1067 - 00/06/18 to 00/06/24
===================================================================
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
igs00P1067.snx Combined weekly solution.
igs00P1067.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS00P25.snx Cumulative Combined solution.
igs00P1067.sum This file.
igs00P1067.itr Residuals between the AC and the IGS97 for the RF stations.
igs00P1067.res Residuals between the AC and the Combined Weekly solution.
IGS00P25.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 = igs00P1067.snx
IGS = IGS00P25.snx
BuA = IERS Bulletin A
ncl are used to quality control the weekly combination.
emr gfz ngs sio excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
After unconstraining:
esa ZWEN
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 | 44 | 32.909 | 1.000 | 32.908 |
emr | 53 | 32 | 2.998 | 1.000 | 2.998 |
esa | 47 | 34 | 9.930 | 1.000 | 9.930 |
gfz | 77 | 39 | 19.731 | 1.000 | 19.731 |
ngs | 72 | 45 | 30.057 | 1.000 | 30.057 |
sio | 138 | 44 | 2.213 | 1.000 | 2.213 |
ncl | 95 | 45 | 2.641 | 1.040 | 2.745 |
igs | 135 | 47 | 1.347 | 1.000 | 1.347 |
---------------|-----|-----|---------------|---------------|---------------|
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 43 | 0.0 -0.1 0.3 | 2.7 3.3 12.6 |
emr 31 | -1.9 -0.3 -0.1 | 4.1 5.5 10.1 |
esa 33 | -0.8 0.3 -0.6 | 5.6 4.3 11.1 |
gfz 38 | 1.5 0.1 -0.5 | 2.7 3.2 9.6 |
ngs 44 | -1.9 0.6 -0.2 | 4.8 9.2 9.6 |
sio 43 | 0.8 0.6 -1.0 | 2.9 3.3 9.9 |
ncl 44 | 0.1 0.0 0.0 | 2.5 2.7 6.2 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 124 | 0.1 -0.9 1.2 | 1.9 1.8 11.0 |
emr 51 | -2.4 0.4 1.9 | 4.6 6.1 8.6 |
esa 47 | -0.7 -1.2 1.3 | 4.1 4.2 6.8 |
gfz 71 | 1.6 -0.8 -0.4 | 2.4 1.7 6.7 |
ngs 70 | -2.6 0.4 -0.8 | 3.2 6.0 8.6 |
sio 122 | 0.6 -0.1 0.2 | 2.2 2.2 5.0 |
ncl 90 | 0.1 -0.7 0.9 | 1.4 1.9 4.6 |
ITR 46 | -0.6 0.2 -0.4 | 3.6 6.0 10.1 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 126 | -0.6 0.2 0.4 | 3.4 3.7 12.5 |
emr 52 | -2.4 0.4 1.3 | 4.5 6.9 11.6 |
esa 47 | -1.2 0.4 0.7 | 5.3 5.6 10.7 |
gfz 72 | 1.3 -0.3 -0.7 | 3.0 3.0 10.2 |
ngs 71 | -2.7 0.0 -1.0 | 5.0 9.1 10.2 |
sio 124 | 0.1 0.7 -0.5 | 3.2 4.4 8.7 |
ncl 91 | -0.4 0.0 0.6 | 2.8 3.3 7.3 |
igs 135 | -0.6 0.8 -0.6 | 2.7 3.7 7.3 |
ITR 51 | 0.0 0.1 -0.1 | 0.6 0.9 2.1 |
---------------|---------------------------|---------------------------|
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 | 0.042 -0.028 0.053 8.9 -5.7 -11.4 2.62 |
emr | -0.022 0.002 0.019 -7.1 1.8 -22.3 1.38 |
esa | -0.023 0.077 0.004 1.3 6.1 5.2 0.37 |
gfz | -0.063 -0.000 0.030 -2.1 0.7 -3.4 1.17 |
ngs | 0.021 0.101 0.090 -6.2 4.4 51.5 2.91 |
sio | -0.047 0.030 0.310 0.9 1.6 40.9 1.87 |
ncl | -0.164 0.104 -0.284 12.9 -4.9 -8.0 1.32 |
---------------|---------------------------------------------------------------|
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 0.067 1.6 1.6 1.6 0.24 |
emr | 0.069 0.072 0.082 1.8 1.8 1.8 0.29 |
esa | 0.070 0.071 0.075 1.8 1.8 1.8 0.28 |
gfz | 0.064 0.065 0.072 1.7 1.7 1.7 0.26 |
ngs | 0.059 0.061 0.067 1.6 1.5 1.5 0.24 |
sio | 0.060 0.061 0.067 1.6 1.6 1.6 0.24 |
ncl | 0.059 0.061 0.067 1.6 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 | 9.9 1.6 -6.7 | 7.8 7.8 15.1 |
---------------|---------------------------|---------------------------|
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 | --- -8.7 -1.8 1.1 2.1 -2.2 |
emr | --- 26.7 -12.7 19.5 -9.2 26.8 |
esa | --- -14.5 -7.2 2.8 -23.1 1.3 |
gfz | --- -2.8 3.6 -5.2 9.7 3.9 |
ngs | --- 116.0 5.8 -83.6 -19.0 56.0 |
sio | --- 20.9 7.5 -3.6 7.0 5.1 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 5.8 5.0 4.2 18.7 -5.0 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 9.7 4.7 10.3 3.1 9.7 |
emr | --- 63.5 11.9 77.3 20.4 22.5 |
esa | --- 11.0 6.8 23.3 3.6 25.4 |
gfz | --- 8.4 2.4 12.7 2.6 11.6 |
ngs | --- 228.2 12.6 48.9 11.5 39.7 |
sio | --- 7.2 1.9 10.6 3.0 7.6 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 10.9 8.5 9.9 6.7 13.8 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF_IGS00P04_RS51.s gfz10677.snx |ZWEN A ----| 17.8 -42.0 35.2|
| | |
ITRF_IGS00P04_RS51.s sio10677.snx |ZWEN A ----| 18.3 -64.9 44.4|
| | |
ITRF_IGS00P04_RS51.s ncl1067g.snx |ZWEN A ----| 19.1 -39.5 25.0|
| | |
cod10677.snx ngs10677.snx |BAKO A ----| -11.5 -0.5 69.2|
| | |
ngs10677.snx sio10677.snx |BAKO A ----| 12.8 4.6 -67.1|
| | |
ngs10677.snx ncl1067g.snx |BAKO A ----| 10.8 -2.0 -50.3|
| | |
igs00P1066.snx gfz10677.snx |COCO A ----| 11.4 -27.3 -27.0|
| | |
igs00P1066.snx ncl1067g.snx |COCO A ----| 7.2 -32.3 -4.4|
| | |
IGS00P24.snx cod10677.snx |LAMA A ----| 20.3 -8.9 1.9|
| | |
IGS00P24.snx gfz10677.snx |ARTU A ----| 3.2 -2.5 -41.0|
| | |
IGS00P24.snx sio10677.snx |ANKR A ----| -9.6 23.5 -9.6|
IGS00P24.snx sio10677.snx |LAMA A ----| 19.8 -9.2 -12.5|
| | |
IGS00P24.snx igs00P1067.snx |MADR A ----| 4.0 15.5 11.8|
IGS00P24.snx igs00P1067.snx |WUHN A ----| 3.4 -12.9 -10.0|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ======
50103M108 TID2 A TID2 A TID2 A TID2 A TID2 A TIDB A TIDB A
13407S012 MAD2 A MAD2 A MADR A
12353M001 YAKZ A YAKZ A YAKZ A YAKA A YAKA A
42005M001 GALA A GALA B GALA A GALA B GALA A GALA A GALA A
40405S031 GOL2 A GOL2 A GOL2 A GOL2 A GOL2 A GOL2 A GOLD A GOLD A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ 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 B IISC A IISC A IISC A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
IERS DOMES NO ncl IGS igs
============= ====== ====== ======
40405S031 GOL2 A GOLD A GOLD A
50103M108 TID2 A TIDB A TIDB A
12353M001 YAKZ A YAKA A YAKA A
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