[IGSREPORT-7286] Wk 1065 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Jun 22 13:26:05 PDT 2000
******************************************************************************
IGS Electronic Report 22 Jun 13:26:36 PDT 2000 Message Number 7286
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1065 - 00/06/04 to 00/06/10
===================================================================
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
igs00P1065.snx Combined weekly solution.
igs00P1065.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS00P23.snx Cumulative Combined solution.
igs00P1065.sum This file.
igs00P1065.itr Residuals between the AC and the IGS97 for the RF stations.
igs00P1065.res Residuals between the AC and the Combined Weekly solution.
IGS00P23.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 IGS97 station positions
and velocities. The IGS97 is a realization of ITRF97, and is aligned
to it.
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 = igs00P1065.snx
IGS = IGS00P23.snx
JPL = jpl1065g.snx
jpl = jpl10657.snx
BuA = IERS Bulletin A
JPL 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 | 129 | 44 | 32.443 | 1.000 | 32.441 |
emr | 34 | 20 | 6.617 | 1.001 | 6.621 |
esa | 56 | 37 | 9.933 | 1.000 | 9.933 |
gfz | 76 | 39 | 19.703 | 1.000 | 19.702 |
jpl | 66 | 33 | 4.039 | 1.000 | 4.038 |
ngs | 70 | 44 | 23.204 | 1.000 | 23.203 |
sio | 130 | 44 | 1.955 | 1.000 | 1.954 |
JPL | 145 | 46 | 2.295 | 1.152 | 2.643 |
ncl | 103 | 45 | 2.641 | 1.078 | 2.847 |
igs | 135 | 46 | 1.511 | 1.000 | 1.511 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to IGS97 stations:
=========================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 42 | -0.7 0.2 0.4 | 2.8 3.1 10.3 |
emr 17 | 2.5 1.2 0.8 | 11.0 11.4 21.8 |
esa 35 | -0.5 0.3 -0.1 | 5.2 5.2 11.4 |
gfz 38 | 1.2 -0.1 0.0 | 2.3 3.1 9.2 |
jpl 32 | -1.2 0.7 0.1 | 2.8 4.6 11.5 |
ngs 42 | -1.0 0.2 0.0 | 3.6 5.6 9.6 |
sio 42 | 0.3 0.3 -1.1 | 2.9 3.3 8.8 |
JPL 45 | 0.6 0.0 0.3 | 2.4 2.8 8.2 |
ncl 44 | 0.4 0.0 0.0 | 2.1 2.5 7.6 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to Weekly Combination:
============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 122 | -0.8 0.6 1.7 | 2.1 2.0 9.7 |
emr 33 | -0.5 2.9 0.7 | 14.6 12.0 17.7 |
esa 56 | -0.7 0.4 0.7 | 4.0 4.3 7.9 |
gfz 72 | 1.0 -0.4 -1.3 | 1.4 1.8 5.8 |
jpl 62 | -1.6 0.5 -0.6 | 2.7 2.8 6.2 |
ngs 69 | -1.3 -0.9 -1.6 | 3.4 6.1 8.7 |
sio 122 | -0.5 0.2 -0.2 | 1.9 2.3 5.0 |
JPL 133 | 0.2 0.1 0.3 | 1.1 1.6 5.3 |
ncl 99 | 0.1 -0.2 -0.3 | 1.2 1.3 4.1 |
ITR 45 | -0.4 0.1 -0.3 | 2.2 2.9 8.5 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to Cumulative Combination:
================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 122 | -1.3 1.3 0.8 | 3.6 3.6 10.1 |
emr 33 | -0.4 2.9 1.2 | 14.1 12.2 19.7 |
esa 56 | -1.1 1.0 0.4 | 5.1 5.7 10.4 |
gfz 72 | 1.0 -0.1 -1.5 | 2.3 2.8 9.3 |
jpl 62 | -1.4 1.0 0.1 | 3.1 4.0 9.6 |
ngs 69 | -1.5 -0.6 -1.9 | 3.8 6.6 10.6 |
sio 122 | -0.9 0.6 -1.2 | 3.1 3.3 7.8 |
JPL 134 | -0.2 0.7 -0.5 | 3.0 3.2 8.4 |
ncl 100 | -0.1 0.4 -0.7 | 2.3 2.7 7.7 |
igs 135 | -0.3 0.6 -0.7 | 2.5 2.7 6.6 |
ITR 51 | 0.0 0.1 -0.1 | 0.5 0.9 1.9 |
---------------|---------------------------|---------------------------|
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 | 0.036 -0.006 0.048 9.3 -1.6 6.9 2.49 |
emr | 0.349 -0.118 -0.118 26.5 0.6 -18.8 -2.32 |
esa | 0.030 0.085 -0.027 -4.5 13.3 31.9 0.59 |
gfz | -0.086 0.037 0.002 -1.5 1.0 -4.1 1.34 |
jpl | 0.028 -0.056 -0.046 7.0 10.4 -15.9 2.07 |
ngs | -0.151 -0.044 0.135 2.0 -11.5 15.4 3.08 |
sio | -0.155 0.051 0.282 6.1 -5.5 57.1 1.93 |
JPL | -0.020 0.008 0.046 -1.2 1.3 -4.9 1.93 |
ncl | -0.197 0.139 -0.301 12.7 -4.7 -8.0 1.40 |
---------------|---------------------------------------------------------------|
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 0.062 0.069 1.6 1.6 1.6 0.25 |
emr | 0.094 0.098 0.114 2.5 2.5 2.5 0.39 |
esa | 0.070 0.071 0.074 1.8 1.8 1.8 0.28 |
gfz | 0.064 0.065 0.072 1.7 1.7 1.7 0.26 |
jpl | 0.068 0.071 0.076 1.8 1.8 1.8 0.28 |
ngs | 0.061 0.063 0.069 1.6 1.6 1.6 0.25 |
sio | 0.062 0.062 0.070 1.6 1.6 1.6 0.25 |
JPL | 0.059 0.061 0.066 1.5 1.5 1.5 0.24 |
ncl | 0.060 0.061 0.067 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 | 5.5 9.3 -4.8 | 6.7 6.6 9.5 |
---------------|---------------------------|---------------------------|
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 | --- -11.0 -5.9 -1.0 3.3 -.4 |
emr | --- 52.9 12.1 -13.0 -13.7 36.3 |
esa | --- -3.9 -3.1 .2 -18.8 .3 |
gfz | --- -14.0 6.7 3.9 5.4 4.0 |
jpl | --- 63.3 -2.4 -10.3 4.2 47.2 |
ngs | --- -163.8 -6.2 -137.2 12.2 -62.0 |
sio | --- -11.9 1.5 .3 5.0 -.2 |
JPL | --- --- --- --- --- --- |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- -15.1 5.4 1.5 24.7 -2.5 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 9.2 3.7 10.0 2.4 9.4 |
emr | --- 11.8 7.1 38.1 7.9 42.8 |
esa | --- 7.4 3.0 9.4 3.2 8.5 |
gfz | --- 11.9 4.2 8.3 3.1 7.7 |
jpl | --- 35.9 5.0 14.9 5.4 31.7 |
ngs | --- 155.0 26.7 48.5 4.8 85.6 |
sio | --- 8.1 5.3 9.2 3.4 8.8 |
JPL | --- --- --- --- --- --- |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 16.7 9.6 16.8 5.9 12.8 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS00P04_RS51.snx gfz10657.snx |ZWEN A ----| 49.3 -32.1 33.0|
| | |
IGS00P04_RS51.snx ngs10657.snx |ZWEN A ----| 45.0 -25.2 20.9|
| | |
IGS00P04_RS51.snx sio10657.snx |ZWEN A ----| 45.1 -33.3 41.2|
| | |
IGS00P04_RS51.snx JPL1065g.snx |ZWEN A ----| 49.0 -26.9 24.1|
| | |
IGS00P04_RS51.snx ncl1065g.snx |ZWEN A ----| 47.1 -28.0 27.2|
| | |
cod10657.snx emr10657.snx |MALI A ----| -18.4 22.6 -67.9|
| | |
cod10657.snx ngs10657.snx |BAKO A ----| -10.7 12.2 56.3|
| | |
emr10657.snx esa10657.snx |SANT A ----| 9.5 6.4 61.0|
| | |
emr10657.snx sio10657.snx |SANT A ----| 3.2 0.5 53.5|
| | |
esa10657.snx ngs10657.snx |SANT A ----| -22.4 -15.2 -66.0|
| | |
ngs10657.snx sio10657.snx |BAKO A ----| 11.2 -9.4 -56.6|
ngs10657.snx sio10657.snx |SANT A ----| 16.1 9.4 58.5|
| | |
IGS00P22.snx cod10657.snx |LAMA A ----| 26.6 -15.5 -4.4|
| | |
IGS00P22.snx gfz10657.snx |ARTU A ----| 2.9 0.4 -40.4|
| | |
IGS00P22.snx jpl10657.snx |ARTU A ----| -0.2 2.6 -36.5|
| | |
IGS00P22.snx sio10657.snx |LAMA A ----| 28.1 -19.9 -19.2|
| | |
IGS00P22.snx sio10657.snx |ANKR A ----| -11.6 23.5 -12.4|
IGS00P22.snx sio10657.snx |MADR A ----| 4.1 16.8 3.4|
| | |
IGS00P22.snx JPL1065g.snx |LAMA A ----| 26.7 -19.7 -7.9|
| | |
IGS00P22.snx JPL1065g.snx |MADR A ----| 4.7 14.3 16.4|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
31303M002 MAS1 A MAS1 A MASP A MAS1 A MAS1 A MAS1 A MAS1 A MAS1 A MAS1 A
13407S012 MAD2 A MAD2 A MADR A MADR A
12353M001 YAKZ A YAKZ A YAKZ A YAKA A YAKA A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
40405S031 GOL2 A GOL2 A GOL2 A GOL2 A GOL2 A GOL2 A GOLD A GOLD A
42005M001 GALA A GALA B GALA A GALA A GALA B GALA A GALA A GALA A
50103M108 TID2 A TID2 A TID2 A TID1 A TID2 A TID2 A TIDB A TIDB A
TID2 A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
22306M002 IISC B IISC A IISC B IISC A IISC A IISC A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
IERS DOMES NO JPL ncl IGS igs
============= ====== ====== ====== ======
40405S031 GOL2 A GOL2 A GOLD A GOLD A
13407S012 MAD2 A MADR A MADR A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
50103M108 TID1 A TID2 A TIDB A TIDB A
TID2 A
12353M001 YAKZ A YAKZ A YAKA A YAKA A
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