[IGSREPORT-8272] Wk 1112 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu May 17 12:18:37 PDT 2001
******************************************************************************
IGS Electronic Report 17 May 12:18:47 PDT 2001 Message Number 8272
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1112 - 01/04/29 to 01/05/05
===================================================================
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
igs01P1112.snx Combined weekly solution.
igs01P1112.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS01P18.snx Cumulative Combined solution.
igs01P1112.sum This file.
igs01P1112.itr Residuals between the AC and the IGS97 for the RF stations.
igs01P1112.res Residuals between the AC and the Combined Weekly solution.
IGS01P18.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 = igs01P1112.snx
IGS = IGS01P18.snx
BuA = IERS Bulletin A
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.
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 | 125 | 41 | 33.823 | 1.000 | 33.828 |
emr | 43 | 27 | 2.980 | 1.001 | 2.982 |
esa | 54 | 34 | 10.536 | 1.000 | 10.536 |
gfz | 65 | 32 | 21.202 | 1.000 | 21.202 |
jpl | 70 | 28 | 3.706 | 1.000 | 3.707 |
ngs | 69 | 43 | 20.041 | 1.000 | 20.042 |
sio | 131 | 40 | 2.411 | 1.024 | 2.469 |
mit | 157 | 41 | 4.602 | 0.981 | 4.514 |
ncl | 103 | 42 | 2.744 | 0.999 | 2.741 |
igs | 130 | 44 | 1.327 | 0.985 | 1.307 |
---------------|-----|-----|---------------|---------------|---------------|
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 40 | 0.4 0.8 -0.8 | 4.4 3.9 12.6 |
emr 26 | -0.7 1.8 0.6 | 3.6 5.3 12.3 |
esa 32 | -2.1 0.1 1.5 | 7.8 5.7 13.7 |
gfz 31 | 0.2 0.4 -0.4 | 3.0 3.9 10.8 |
jpl 26 | 0.0 0.3 -0.2 | 2.4 3.7 10.8 |
ngs 42 | -3.3 1.2 -0.4 | 7.1 8.0 14.1 |
sio 38 | -1.6 1.0 -2.0 | 3.0 4.7 14.9 |
mit 40 | 0.0 0.5 -1.0 | 3.2 2.8 10.1 |
ncl 41 | 0.1 0.4 -0.1 | 2.7 3.4 8.5 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 113 | 1.0 0.4 1.8 | 2.4 2.5 7.9 |
emr 38 | -0.9 1.5 0.5 | 2.2 5.2 8.2 |
esa 52 | -2.1 -1.2 0.4 | 5.5 5.2 9.9 |
gfz 58 | 0.2 -0.4 0.3 | 1.7 1.9 6.2 |
jpl 61 | 0.5 -0.1 -1.0 | 2.1 1.5 7.5 |
ngs 66 | -3.2 0.3 -0.1 | 5.1 7.1 9.5 |
sio 112 | -0.9 0.4 2.5 | 2.6 3.0 11.8 |
mit 122 | 0.3 -0.1 0.3 | 1.2 1.2 4.2 |
ncl 98 | 0.7 -0.2 1.8 | 1.1 1.1 4.0 |
ITR 43 | 0.3 -0.4 -0.2 | 2.8 3.9 10.2 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 114 | 0.3 2.0 2.5 | 4.4 4.9 9.4 |
emr 39 | -0.7 1.2 1.0 | 3.0 7.9 9.9 |
esa 53 | -2.7 0.1 1.3 | 6.6 6.2 11.4 |
gfz 58 | -0.3 0.3 0.8 | 2.3 3.6 8.3 |
jpl 61 | 0.4 0.4 0.5 | 2.5 3.0 8.5 |
ngs 67 | -3.5 0.9 0.6 | 6.5 8.6 12.4 |
sio 112 | -1.2 1.7 3.0 | 3.3 5.5 14.3 |
mit 120 | -0.2 1.3 0.7 | 3.1 2.8 6.8 |
ncl 97 | 0.3 0.7 2.4 | 2.7 3.1 5.8 |
igs 128 | -0.5 1.3 0.6 | 2.5 3.1 6.2 |
ITR 51 | 0.0 0.1 -0.2 | 1.3 2.0 5.5 |
---------------|---------------------------|---------------------------|
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 | 0.030 -0.129 -0.024 11.1 6.1 -11.1 2.20 |
emr | -0.034 0.028 -0.019 20.9 -3.7 43.0 2.22 |
esa | 0.077 0.022 -0.008 -9.5 3.8 7.0 1.91 |
gfz | -0.007 -0.012 0.103 -1.3 0.6 -1.1 2.64 |
jpl | 0.007 -0.001 -0.032 4.7 -5.1 -6.0 2.16 |
ngs | 0.287 0.475 -0.001 -40.6 32.8 16.9 2.13 |
sio | 0.108 0.202 -0.029 0.5 19.0 67.7 1.49 |
mit | -0.011 -0.012 -0.010 0.2 -0.2 -0.1 2.28 |
ncl | -0.061 0.160 -0.316 11.6 -3.2 -7.7 1.95 |
---------------|---------------------------------------------------------------|
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 0.064 0.069 1.6 1.6 1.6 0.25 |
emr | 0.076 0.076 0.091 2.0 2.0 2.0 0.31 |
esa | 0.071 0.071 0.078 1.8 1.8 1.8 0.29 |
gfz | 0.067 0.073 0.082 1.8 1.8 1.8 0.28 |
jpl | 0.076 0.074 0.089 2.0 2.0 2.0 0.31 |
ngs | 0.060 0.062 0.069 1.6 1.6 1.6 0.25 |
sio | 0.064 0.065 0.072 1.7 1.7 1.6 0.26 |
mit | 0.061 0.063 0.072 1.6 1.6 1.6 0.25 |
ncl | 0.060 0.063 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 | 8.8 -0.8 -13.3 | 2.3 3.2 7.0 |
---------------|---------------------------|---------------------------|
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 | --- -10.6 -2.6 1.8 8.4 -.7 |
emr | --- -18.1 12.7 27.0 -1.2 8.1 |
esa | --- -21.2 -1.0 4.1 -11.9 1.7 |
gfz | --- 20.5 4.4 .5 1.4 -2.0 |
jpl | --- -16.1 1.4 12.7 3.5 14.2 |
ngs | --- 27.4 -9.8 -150.7 -.3 -55.6 |
sio | --- 17.7 -1.0 .2 5.0 -12.7 |
mit | --- 18.0 -4.6 1.0 -5.2 -.4 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- -.3 5.0 1.0 27.6 -1.9 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 10.3 2.9 14.3 4.2 9.4 |
emr | --- 10.5 10.1 14.0 6.9 27.9 |
esa | --- 11.4 5.5 24.1 3.4 12.3 |
gfz | --- 11.4 2.6 6.9 4.4 6.8 |
jpl | --- 35.8 3.9 15.2 4.4 12.7 |
ngs | --- 25.3 15.1 59.3 16.1 27.5 |
sio | --- 18.1 4.4 23.1 3.7 8.0 |
mit | --- 6.2 2.2 1.4 1.8 3.8 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 21.8 8.6 18.7 12.3 22.4 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS00P04_RS51.snx sio11127.snx |TSKB A ----| -5.0 -6.1 38.4|
| | |
cod11127.snx emr11127.snx |EISL A ----| 1.8 0.8 -51.1|
| | |
cod11127.snx ngs11127.snx |BAKO A ----| -8.0 7.7 -66.5|
| | |
emr11127.snx sio11127.snx |PIMO A ----| 9.3 5.4 50.6|
| | |
esa11127.snx ngs11127.snx |ASC1 A ----| -24.8 -72.6 106.8|
| | |
gfz11127.snx ngs11127.snx |ASC1 A ----| -15.4 -90.2 88.3|
| | |
jpl11127.snx sio11127.snx |PIMO A ----| -6.8 10.7 57.9|
jpl11127.snx sio11127.snx |SANT A ----| 4.5 -1.9 51.8|
| | |
ngs11127.snx sio11127.snx |ASC1 A ----| 15.2 62.9 -94.8|
| | |
ngs11127.snx mit1112g.snx |ASC1 A ----| 18.3 85.0 -97.7|
| | |
ngs11127.snx ncl1112g.snx |ASC1 A ----| 16.8 86.4 -96.0|
| | |
igs01P1111.snx esa11127.snx |SANT A ----| 9.7 -5.6 60.9|
| | |
IGS01P17.snx cod11127.snx |BILI A ----| 41.4 7.9 -136.6|
| | |
IGS01P17.snx gfz11127.snx |BILI A ----| 43.0 5.4 -137.8|
| | |
IGS01P17.snx gfz11127.snx |COCO A ----| 7.9 -34.3 1.6|
| | |
IGS01P17.snx gfz11127.snx |LAE1 A ----| 2.9 -3.4 40.6|
| | |
IGS01P17.snx jpl11127.snx |COCO A ----| 8.7 -27.9 3.5|
| | |
IGS01P17.snx sio11127.snx |BILI A ----| 45.0 9.0 -111.3|
| | |
IGS01P17.snx sio11127.snx |ANKR A ----| -9.2 18.7 6.7|
IGS01P17.snx sio11127.snx |YSSK A ----| -0.4 1.0 30.8|
| | |
IGS01P17.snx mit1112g.snx |BILI A ----| 42.4 8.4 -135.0|
| | |
IGS01P17.snx mit1112g.snx |ANKR A ----| -8.3 13.6 -2.9|
IGS01P17.snx mit1112g.snx |COCO A ----| 10.3 -30.7 5.7|
IGS01P17.snx mit1112g.snx |JAB1 A ----| 14.9 -2.0 4.4|
IGS01P17.snx mit1112g.snx |RAMO A ----| -1.1 15.8 3.5|
| | |
IGS01P17.snx ncl1112g.snx |BILI A ----| 44.8 7.8 -129.5|
| | |
IGS01P17.snx ncl1112g.snx |COCO A ----| 9.3 -30.8 4.6|
| | |
IGS01P18.snx igs01P1112.snx |COCO A ----| 7.3 -27.2 1.1|
IGS01P18.snx igs01P1112.snx |RAMO A ----| -1.1 14.7 5.0|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
30314M002 SUTH A SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A SUTH A
13407S012 MADR A MADR A MAD2 A MADR A MAD2 A MADR 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
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
40405S031 GOLD A GOL2 A GOLD A GOL2 A GOL2 A GOLD A GOLD A
50103M108 TIDB A TIDB A TID2 A TIDB A TID1 A TID2 A TID2 A TIDB A TIDB A
TIDB A
50107M004 YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A
YAR2 A
51002M001 LAE1 A LAE1 A
51002S001 LAE1 A LAE1 A
22306M002 IISC A IISC A IISC B IISC B IISC A IISC A IISC A
22003M001 PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S012 MADR A MADR A MADR A MADR A
MAD2 A
31303M001 MAS1 A
31303M002 MAS1 A MAS1 A MAS1 A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
40405S031 GOLD A GOL2 A GOLD A GOLD A
GOL2 A
50103M108 TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
51002S001 LAE1 A
51002M001 LAE1 A LAE1 A
12353M001 YAKZ A YAKZ A YAKA A YAKA A
50107M004 YAR1 A YAR1 A YAR1 A YAR1 A
YAR2 A
12309M001 MDVO A
12309M002 MDVO A MDVO A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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