[IGSREPORT-8728] Wk 1135 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Oct 25 13:24:17 PDT 2001
******************************************************************************
IGS Electronic Report 25 Oct 13:24:30 PDT 2001 Message Number 8728
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1135 - 01/10/07 to 01/10/13
===================================================================
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
igs01P1135.snx Combined weekly solution.
igs01P1135.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS01P41.snx Cumulative Combined solution.
igs01P1135.sum This file.
igs01P1135.itr Residuals between the AC and the IGS97 for the RF stations.
igs01P1135.res Residuals between the AC and the Combined Weekly solution.
IGS01P41.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 = igs01P1135.snx
IGS = IGS01P41.snx
BuA = IERS Bulletin A
mit ncl are used to quality control the weekly combination.
cod gfz excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
From the original solution:
ITR AREQ
After unconstraining:
emr NRC1 NRC2
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 | 129 | 43 | 25.749 | 1.001 | 25.764 |
emr | 38 | 26 | 3.035 | 1.000 | 3.034 |
esa | 52 | 38 | 7.939 | 1.000 | 7.939 |
gfz | 82 | 39 | 6.335 | 0.998 | 6.319 |
jpl | 55 | 30 | 4.742 | 1.000 | 4.743 |
ngs | 73 | 47 | 21.655 | 1.001 | 21.667 |
sio | 141 | 44 | 1.688 | 1.000 | 1.689 |
mit | 167 | 47 | 3.493 | 0.932 | 3.256 |
ncl | 99 | 45 | 2.188 | 1.004 | 2.197 |
igs | 152 | 49 | 1.380 | 1.005 | 1.387 |
---------------|-----|-----|---------------|---------------|---------------|
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 42 | 1.1 1.2 -0.7 | 3.3 4.5 13.0 |
emr 25 | -0.6 -0.2 0.3 | 3.6 7.4 13.2 |
esa 36 | -3.3 0.5 0.5 | 6.4 6.4 13.4 |
gfz 38 | 1.5 0.4 -0.1 | 3.0 4.4 11.2 |
jpl 29 | 0.3 0.2 -0.9 | 3.5 5.6 11.4 |
ngs 45 | -2.9 1.0 0.2 | 3.6 5.3 14.6 |
sio 43 | -0.8 0.5 -0.6 | 3.5 4.1 11.0 |
mit 46 | 1.3 0.6 -0.7 | 3.1 4.1 10.5 |
ncl 44 | 0.1 0.1 0.2 | 2.8 4.0 9.0 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 126 | 1.2 0.8 -1.5 | 1.5 2.4 10.2 |
emr 37 | -0.6 -0.4 -2.1 | 3.5 4.5 9.9 |
esa 51 | -3.7 0.6 0.0 | 4.6 4.6 8.9 |
gfz 77 | 0.7 0.2 1.2 | 1.8 1.5 5.5 |
jpl 52 | -0.1 0.4 -3.0 | 1.9 2.2 6.8 |
ngs 71 | -3.2 0.1 0.1 | 1.9 3.8 8.7 |
sio 133 | -1.1 0.2 1.8 | 1.4 1.9 5.3 |
mit 146 | 1.2 0.3 -0.5 | 0.7 1.0 4.1 |
ncl 97 | -0.5 -0.8 1.7 | 1.7 2.1 3.1 |
ITR 48 | -0.3 -0.3 -0.3 | 3.0 4.3 10.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 127 | 1.3 1.2 -2.3 | 2.6 3.8 10.7 |
emr 38 | -0.7 -0.8 -2.0 | 3.5 6.0 11.3 |
esa 52 | -3.5 0.8 -0.2 | 5.0 5.8 10.2 |
gfz 77 | 0.9 0.2 0.9 | 2.7 2.4 8.4 |
jpl 53 | 0.2 0.4 -3.6 | 2.5 3.9 8.5 |
ngs 72 | -2.9 0.4 -0.3 | 3.2 5.5 11.1 |
sio 134 | -1.0 0.6 0.9 | 2.6 3.5 7.8 |
mit 147 | 1.3 0.9 -1.4 | 2.2 2.7 6.5 |
ncl 97 | -0.4 -0.4 1.3 | 2.3 2.9 6.1 |
igs 152 | 0.1 0.4 -0.8 | 2.2 2.4 5.8 |
ITR 50 | -0.2 -0.1 -0.2 | 1.8 2.7 7.4 |
---------------|---------------------------|---------------------------|
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 | 0.003 -0.038 0.009 -0.0 0.7 -2.9 2.57 |
emr | 0.023 -0.045 -0.015 -10.3 8.0 -57.9 2.60 |
esa | 0.049 0.024 -0.045 -12.6 25.9 -1.8 1.98 |
gfz | 0.000 -0.013 -0.058 -1.4 0.6 -5.0 2.64 |
jpl | -0.043 -0.018 -0.046 -2.4 8.5 -40.7 2.73 |
ngs | -0.138 0.093 0.076 -14.3 -14.2 11.3 2.47 |
sio | 0.172 0.183 -0.095 2.1 12.7 49.9 2.46 |
mit | -0.002 -0.001 -0.035 -0.3 0.0 -1.9 2.42 |
ncl | -0.008 0.382 -0.726 -10.7 2.4 -13.3 1.91 |
---------------|---------------------------------------------------------------|
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 0.069 1.6 1.6 1.6 0.25 |
emr | 0.077 0.078 0.088 2.0 2.0 2.0 0.31 |
esa | 0.069 0.068 0.074 1.8 1.8 1.7 0.27 |
gfz | 0.064 0.064 0.074 1.7 1.7 1.7 0.26 |
jpl | 0.074 0.070 0.083 1.9 1.9 1.9 0.29 |
ngs | 0.060 0.061 0.067 1.6 1.6 1.5 0.24 |
sio | 0.062 0.061 0.068 1.6 1.6 1.6 0.25 |
mit | 0.059 0.059 0.067 1.5 1.5 1.5 0.24 |
ncl | 0.061 0.060 0.069 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 | -5.6 3.0 -19.4 | 2.4 2.6 8.2 |
---------------|---------------------------|---------------------------|
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 | --- 23.7 -5.6 -3.0 -8.0 .4 |
emr | --- 21.5 -2.0 -46.2 6.0 3.3 |
esa | --- 21.6 -.2 -.3 -27.1 1.9 |
gfz | --- 8.4 4.8 -3.7 7.6 -1.6 |
jpl | --- 12.7 -1.5 18.8 -.1 -6.5 |
ngs | --- -80.4 -5.8 84.5 5.3 18.0 |
sio | --- -29.9 -5.5 -4.5 -.7 -9.2 |
mit | --- 29.1 -.8 -.6 1.5 .2 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 14.1 13.1 -.9 25.9 .5 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 7.5 2.8 8.6 4.1 12.0 |
emr | --- 8.4 8.6 19.3 9.7 37.5 |
esa | --- 10.4 2.5 13.9 5.5 21.1 |
gfz | --- 23.6 2.6 4.3 4.7 6.5 |
jpl | --- 16.4 4.0 8.5 5.7 19.6 |
ngs | --- 45.5 13.1 66.0 19.7 57.4 |
sio | --- 7.0 1.8 10.4 4.2 12.9 |
mit | --- 2.3 .6 2.6 1.3 2.2 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 20.8 10.0 12.1 5.9 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)|
-----------------------------------------|------------|-----------------------|
| | |
IGS00P04_RS51.snx sio11357.snx |CAS1 A ----| 2.9 3.2 -27.1|
| | |
IGS00P04_RS51.snx ncl1135g.snx |SANT A ----| -4.7 -15.7 10.6|
| | |
cod11357.snx jpl11357.snx |SIMO A ----| -4.5 2.7 -53.0|
| | |
emr11357.snx ngs11357.snx |EISL A ----| 3.5 -22.7 73.3|
| | |
esa11357.snx ngs11357.snx |EISL A ----| -8.6 -25.5 53.1|
esa11357.snx ngs11357.snx |OHIG A ----| -29.5 -21.7 -50.4|
esa11357.snx ngs11357.snx |RIOG A ----| -24.1 -21.6 -51.1|
| | |
gfz11357.snx ngs11357.snx |EISL A ----| 6.0 -30.5 81.4|
| | |
gfz11357.snx ncl1135g.snx |AREQ A 2| -3.8 -22.4 -20.4|
| | |
jpl11357.snx ngs11357.snx |EISL A ----| -1.4 -39.8 82.6|
| | |
ngs11357.snx sio11357.snx |EISL A ----| -3.0 28.7 -56.5|
| | |
ngs11357.snx mit1135g.snx |EISL A ----| 2.9 30.8 -63.8|
| | |
ngs11357.snx ncl1135g.snx |EISL A ----| -0.3 26.6 -62.4|
| | |
IGS01P40.snx cod11357.snx |HOFN A ----| 8.3 -4.1 -49.2|
| | |
IGS01P40.snx gfz11357.snx |COCO A ----| 6.3 -16.2 0.5|
IGS01P40.snx gfz11357.snx |HOFN A ----| 9.5 -2.7 -50.2|
| | |
IGS01P40.snx sio11357.snx |HERS A ----| -2.1 15.8 14.4|
IGS01P40.snx sio11357.snx |HOFN A ----| 5.9 0.8 -50.8|
| | |
IGS01P40.snx mit1135g.snx |COCO A ----| 5.1 -19.3 5.7|
IGS01P40.snx mit1135g.snx |HOFN A ----| 7.6 -4.4 -46.9|
| | |
IGS01P40.snx ncl1135g.snx |COCO A ----| 3.1 -18.3 2.2|
IGS01P40.snx ncl1135g.snx |HOFN A ----| 7.9 -4.3 -45.4|
| | |
IGS01P40.snx igs01P1135.snx |COCO A ----| 3.5 -18.9 0.3|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
22003M001 PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A
22306M002 IISC A IISC A IISC A IISC A IISC B IISC A IISC A IISC A
42005M001 GALA A GALA B GALA A GALA A GALA B GALA A GALA A GALA A
13407S012 MADR A MADR A MADR A MAD2 A MADR A MADR A
40405S031 GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
42202M005 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
30314M002 SUTH A SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
50107M004 YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A
YAR2 A
20705M001 BSHM A BSHM 2 BSHM 2
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT sio:
-----------------------------
CAVA A SFEL A VOLT 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
40405S031 GOLD A GOLD A GOLD A
GOL2 A
50103M108 TIDB A TID2 A TIDB A TIDB A
TID2 A TIDB A
50107M004 YAR1 A YAR1 A YAR1 A YAR1 A
YAR2 A
12309M001 MDVO A
12309M002 MDVO A MDVO A
20705M001 BSHM A BSHM 2 BSHM 2
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
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