[IGSREPORT-7742] Wk 1086 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Nov 16 11:54:02 PST 2000
******************************************************************************
IGS Electronic Report 16 Nov 11:54:19 PST 2000 Message Number 7742
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1086 - 00/10/29 to 00/11/04
===================================================================
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
igs00P1086.snx Combined weekly solution.
igs00P1086.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS00P44.snx Cumulative Combined solution.
igs00P1086.sum This file.
igs00P1086.itr Residuals between the AC and the IGS97 for the RF stations.
igs00P1086.res Residuals between the AC and the Combined Weekly solution.
IGS00P44.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 = igs00P1086.snx
IGS = IGS00P44.snx
BuA = IERS Bulletin A
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.
4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
is included in the erp files.
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 | 123 | 44 | 30.143 | 0.997 | 30.039 |
emr | 44 | 34 | 2.816 | 0.998 | 2.811 |
esa | 55 | 40 | 9.168 | 0.999 | 9.156 |
gfz | 69 | 37 | 24.562 | 0.997 | 24.500 |
jpl | 63 | 35 | 4.408 | 0.997 | 4.396 |
ngs | 73 | 48 | 20.442 | 0.997 | 20.380 |
sio | 134 | 46 | 2.009 | 0.937 | 1.882 |
mit | 140 | 46 | 4.211 | 1.261 | 5.310 |
igs | 132 | 49 | 1.388 | 1.050 | 1.458 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 0.2 0.8 -0.3 | 3.4 4.4 10.1 |
emr 33 | -0.6 0.0 -1.9 | 3.6 4.9 10.4 |
esa 39 | -0.6 -0.5 -0.2 | 5.2 5.9 11.9 |
gfz 36 | 1.0 0.2 -0.4 | 3.5 3.7 8.2 |
jpl 34 | 0.0 0.7 -0.5 | 3.6 4.6 10.2 |
ngs 47 | -1.6 0.2 0.0 | 2.9 5.7 9.4 |
sio 45 | 0.7 0.0 -1.4 | 2.7 4.4 8.5 |
mit 45 | 0.4 0.0 0.8 | 2.6 3.6 9.0 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 116 | -0.1 0.7 1.1 | 2.9 2.7 8.1 |
emr 42 | -0.6 0.8 -2.9 | 2.6 3.0 6.5 |
esa 55 | -1.0 -0.8 0.9 | 5.2 5.2 8.2 |
gfz 65 | 0.9 -0.3 1.6 | 2.2 1.5 5.7 |
jpl 61 | -0.4 0.9 0.1 | 2.1 1.9 6.2 |
ngs 70 | -2.3 -0.6 -0.4 | 3.3 5.6 7.5 |
sio 120 | 0.4 -0.2 0.0 | 1.9 2.8 4.5 |
mit 125 | 0.6 0.1 0.7 | 1.4 1.5 4.5 |
ITR 48 | -0.4 0.0 -0.4 | 2.4 3.5 8.8 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 117 | 0.0 1.0 1.0 | 3.6 4.5 9.6 |
emr 43 | 0.3 0.2 -2.3 | 4.0 6.1 8.5 |
esa 55 | -1.1 -0.6 0.2 | 4.9 5.5 9.9 |
gfz 65 | 1.0 0.6 2.3 | 3.8 3.0 8.0 |
jpl 61 | -0.1 1.2 1.3 | 3.3 3.6 8.6 |
ngs 71 | -1.8 -0.3 0.5 | 3.5 6.8 8.2 |
sio 120 | 0.8 0.2 -0.2 | 2.7 3.5 7.9 |
mit 126 | 0.5 0.1 1.8 | 2.9 4.7 8.1 |
igs 132 | 0.2 0.5 0.0 | 2.3 2.6 6.4 |
ITR 51 | -0.1 0.1 -0.2 | 0.9 1.3 4.1 |
---------------|---------------------------|---------------------------|
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 | 0.007 -0.023 0.001 -6.8 -5.7 -3.0 2.05 |
emr | 0.007 0.030 -0.022 8.5 -3.9 15.2 2.37 |
esa | 0.066 0.016 -0.033 -5.5 11.6 0.4 1.35 |
gfz | -0.071 0.002 -0.053 0.1 0.1 -2.5 1.21 |
jpl | 0.026 -0.026 -0.024 -1.9 -1.1 -27.3 2.05 |
ngs | -0.053 0.225 0.045 0.7 2.5 103.4 3.13 |
sio | -0.161 0.208 0.094 7.3 -6.6 68.2 1.98 |
mit | -0.016 -0.004 -0.024 -0.7 -0.5 -1.4 1.73 |
---------------|---------------------------------------------------------------|
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 | 0.061 0.061 0.068 1.6 1.6 1.6 0.24 |
emr | 0.070 0.068 0.080 1.8 1.8 1.8 0.28 |
esa | 0.065 0.064 0.069 1.7 1.7 1.6 0.26 |
gfz | 0.066 0.066 0.075 1.7 1.7 1.7 0.27 |
jpl | 0.067 0.067 0.075 1.7 1.7 1.7 0.27 |
ngs | 0.058 0.059 0.065 1.5 1.5 1.5 0.24 |
sio | 0.060 0.060 0.066 1.5 1.5 1.5 0.24 |
mit | 0.060 0.060 0.068 1.6 1.6 1.5 0.24 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -1.6 -3.9 -19.1 | 6.1 6.2 8.8 |
---------------|---------------------------|---------------------------|
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 | --- -6.2 -21.9 .9 -.4 .2 |
emr | --- 11.5 -6.7 -16.0 3.9 2.4 |
esa | --- -7.0 -1.4 -5.6 -24.8 -2.5 |
gfz | --- -16.6 11.3 -2.0 6.6 3.3 |
jpl | --- 16.5 -.3 -1.9 5.0 5.2 |
ngs | --- 317.7 -14.5 21.5 4.3 -3.6 |
sio | --- 8.1 -1.1 -.8 .6 -.6 |
mit | --- 1.2 3.2 -.9 2.6 .8 |
ITR | --- --- --- --- --- --- |
BuA | --- 13.9 3.2 1.9 30.9 1.3 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 10.7 3.0 7.6 3.9 9.2 |
emr | --- 11.9 6.5 13.2 5.4 6.5 |
esa | --- 15.3 6.9 29.5 3.2 18.5 |
gfz | --- 10.8 3.7 5.8 3.2 8.6 |
jpl | --- 33.2 3.7 37.4 4.9 34.8 |
ngs | --- 92.2 8.0 46.6 9.6 37.6 |
sio | --- 15.1 3.0 16.5 2.2 7.0 |
mit | --- 10.8 2.7 7.6 1.4 4.9 |
ITR | --- --- --- --- --- --- |
BuA | --- 15.9 5.7 15.8 7.4 15.5 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
gfz10867.snx ngs10867.snx |DGAR A ----| -15.7 50.8 15.1|
| | |
IGS00P43.snx gfz10867.snx |COCO A ----| 11.1 -37.1 -17.5|
| | |
IGS00P43.snx jpl10867.snx |COCO A ----| 8.8 -27.5 0.3|
| | |
IGS00P43.snx ngs10867.snx |PETP A ----| -24.9 62.1 4.3|
| | |
IGS00P43.snx sio10867.snx |COCO A ----| -0.2 -35.4 3.1|
| | |
IGS00P43.snx igs00P1086.snx |COCO A ----| 6.0 -35.8 -9.4|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42005M001 GALA A GALA A GALA B GALA A 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 MAS1 A
13407S012 MADR A MADR A MADR A MAD2 A MADR A MADR A
MADR A
12353M001 YAKZ A YAKZ A YAKZ A YAKA A YAKA 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 NRC1 A NRC1 A
NRC2 A
50103M108 TIDB A TID2 A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
22306M002 IISC A IISC A IISC B IISC B IISC A IISC A IISC A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
IERS DOMES NO mit IGS igs
============= ====== ====== ======
31303M001 MAS1 A
31303M002 MAS1 A MAS1 A
40114M001 NRC1 A NRC1 A NRC1 A
NRC2 A
40405S031 GOLD A GOLD A GOLD A
GOL2 A
50103M108 TID2 A TIDB A TIDB A
TIDB A
12353M001 YAKZ A YAKA A YAKA A
12309M001 MDVO A
12309M002 MDVO A MDVO A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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