[IGSREPORT-7601] Wk 1079 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Sep 28 17:56:19 PDT 2000
******************************************************************************
IGS Electronic Report 28 Sep 17:56:23 PDT 2000 Message Number 7601
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1079 - 00/09/10 to 00/09/16
===================================================================
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
igs00P1079.snx Combined weekly solution.
igs00P1079.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS00P37.snx Cumulative Combined solution.
igs00P1079.sum This file.
igs00P1079.itr Residuals between the AC and the IGS97 for the RF stations.
igs00P1079.res Residuals between the AC and the Combined Weekly solution.
IGS00P37.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 = igs00P1079.snx
IGS = IGS00P37.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 | 124 | 44 | 35.566 | 0.999 | 35.534 |
emr | 45 | 32 | 2.462 | 0.998 | 2.457 |
esa | 48 | 36 | 8.901 | 0.989 | 8.802 |
gfz | 69 | 35 | 16.850 | 0.999 | 16.828 |
jpl | 65 | 30 | 3.794 | 1.000 | 3.794 |
ngs | 72 | 46 | 20.804 | 1.025 | 21.324 |
sio | 128 | 45 | 2.043 | 0.996 | 2.035 |
mit | 148 | 45 | 4.476 | 0.949 | 4.246 |
ncl | 86 | 41 | 2.740 | 0.922 | 2.526 |
igs | 134 | 48 | 1.385 | 1.016 | 1.407 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 1.0 0.4 -0.7 | 2.1 3.8 11.2 |
emr 30 | -1.1 0.7 -0.4 | 2.8 6.2 9.9 |
esa 34 | -0.9 -0.1 -0.5 | 4.7 5.7 12.6 |
gfz 34 | 2.3 -0.4 -0.3 | 2.3 3.6 8.0 |
jpl 29 | -0.6 0.0 -0.9 | 2.3 3.4 8.9 |
ngs 45 | -2.5 0.6 -0.3 | 5.8 4.5 12.3 |
sio 44 | -0.9 0.2 -1.8 | 2.3 3.5 12.0 |
mit 44 | 1.0 -0.1 -1.7 | 1.7 2.9 9.9 |
ncl 40 | 0.5 -0.3 -0.3 | 2.0 2.7 6.8 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 118 | 0.8 0.5 2.0 | 2.1 2.5 8.3 |
emr 43 | -0.8 1.7 0.6 | 1.9 4.8 5.4 |
esa 48 | -0.6 -0.1 -0.7 | 3.9 5.6 8.3 |
gfz 64 | 2.4 -0.4 1.5 | 1.4 2.3 5.0 |
jpl 61 | -0.8 0.4 0.4 | 2.0 2.5 5.1 |
ngs 70 | -1.9 0.8 1.2 | 6.0 5.5 7.2 |
sio 116 | -1.2 0.8 0.3 | 1.8 2.6 5.7 |
mit 126 | 0.8 0.2 0.0 | 1.0 1.1 3.7 |
ncl 81 | 0.7 0.1 1.8 | 1.3 1.8 3.8 |
ITR 47 | -0.2 0.1 -0.4 | 1.7 2.8 10.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 120 | 0.7 0.6 -1.8 | 2.9 4.6 10.6 |
emr 43 | -1.0 1.6 -1.1 | 2.6 5.6 8.0 |
esa 48 | -0.8 0.3 -2.5 | 4.4 5.8 12.6 |
gfz 64 | 2.3 -0.2 -0.3 | 2.4 3.6 7.3 |
jpl 62 | -1.1 0.7 -1.8 | 2.4 3.6 7.5 |
ngs 71 | -1.9 0.6 0.2 | 5.9 6.6 9.9 |
sio 117 | -1.3 1.1 -2.9 | 2.6 4.0 9.0 |
mit 126 | 0.7 0.2 -3.1 | 2.1 2.7 8.1 |
ncl 82 | 0.4 0.4 -0.3 | 2.2 3.4 6.0 |
igs 134 | -0.1 0.1 -2.9 | 1.9 2.8 7.2 |
ITR 51 | -0.1 0.1 -0.2 | 0.8 1.2 3.6 |
---------------|---------------------------|---------------------------|
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 | 0.008 -0.011 0.009 -5.8 -6.3 7.1 2.24 |
emr | -0.036 -0.006 -0.036 11.5 -9.1 39.0 2.12 |
esa | 0.081 0.011 -0.023 8.6 9.1 2.3 1.55 |
gfz | -0.091 0.007 -0.070 0.2 0.2 -2.3 1.27 |
jpl | -0.018 -0.037 0.013 -10.5 1.6 -24.4 2.03 |
ngs | 0.032 -0.008 0.042 3.8 7.4 53.9 2.45 |
sio | -0.107 0.268 -0.008 3.9 3.0 76.4 2.15 |
mit | -0.002 -0.003 -0.005 -0.2 0.0 -1.7 2.04 |
ncl | -0.125 0.045 -0.306 13.5 -6.0 -9.9 1.51 |
---------------|---------------------------------------------------------------|
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 0.067 1.6 1.6 1.6 0.24 |
emr | 0.072 0.072 0.083 1.9 1.9 1.9 0.29 |
esa | 0.070 0.069 0.076 1.8 1.8 1.8 0.28 |
gfz | 0.068 0.068 0.078 1.8 1.8 1.8 0.27 |
jpl | 0.072 0.073 0.082 1.9 1.9 1.9 0.29 |
ngs | 0.059 0.061 0.067 1.6 1.6 1.5 0.24 |
sio | 0.060 0.061 0.067 1.6 1.6 1.5 0.24 |
mit | 0.060 0.061 0.069 1.6 1.6 1.6 0.24 |
ncl | 0.063 0.063 0.070 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 | -3.5 -0.4 -16.6 | 6.1 6.2 7.7 |
---------------|---------------------------|---------------------------|
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 | --- -18.6 -15.2 3.6 1.8 .8 |
emr | --- 23.2 -10.0 13.8 .4 20.4 |
esa | --- 20.8 -9.6 -3.7 -14.3 -2.7 |
gfz | --- -44.8 -3.1 4.8 -4.2 1.6 |
jpl | --- 27.7 4.9 17.3 5.9 14.9 |
ngs | --- -16.2 31.3 -57.6 -5.2 -2.7 |
sio | --- 33.5 -1.0 -6.9 9.2 -10.8 |
mit | --- 14.1 -1.5 .5 1.7 -.6 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 17.7 -8.2 4.8 22.4 -.2 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 9.9 7.5 12.8 2.8 8.5 |
emr | --- 19.5 7.2 26.3 9.9 19.5 |
esa | --- 15.0 4.0 24.5 4.4 20.4 |
gfz | --- 11.0 4.4 8.1 3.1 20.3 |
jpl | --- 29.5 7.9 22.8 5.2 19.7 |
ngs | --- 228.8 14.1 49.0 14.0 41.9 |
sio | --- 8.0 5.9 9.9 5.3 7.4 |
mit | --- 5.4 2.1 2.5 1.9 3.4 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
BuA | --- 9.0 12.0 18.9 8.1 15.2 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
cod10797.snx gfz10797.snx |USUD A ----| 4.3 2.8 51.2|
| | |
cod10797.snx ngs10797.snx |CRO1 A ----| -3.6 -15.5 67.3|
| | |
cod10797.snx sio10797.snx |USUD A ----| -0.5 0.2 58.1|
| | |
emr10797.snx esa10797.snx |FORT A ----| 8.7 -6.7 50.3|
| | |
ngs10797.snx sio10797.snx |BAKO A ----| 12.9 5.7 -63.6|
ngs10797.snx sio10797.snx |CORD A ----| 16.6 2.9 52.6|
ngs10797.snx sio10797.snx |CRO1 A ----| 3.7 15.3 -60.2|
| | |
ngs10797.snx mit1079g.snx |CRO1 A ----| 4.3 13.0 -59.8|
| | |
ngs10797.snx ncl1079g.snx |CRO1 A ----| 6.4 12.5 -52.4|
| | |
IGS00P36.snx cod10797.snx |LAMA A ----| 35.2 -13.8 -0.8|
| | |
IGS00P36.snx emr10797.snx |NTUS A ----| -0.1 11.1 -55.4|
| | |
IGS00P36.snx gfz10797.snx |COCO A ----| 6.5 -38.5 -4.5|
| | |
IGS00P36.snx jpl10797.snx |COCO A ----| 6.7 -28.8 11.0|
IGS00P36.snx jpl10797.snx |JAMA A ----| 1.5 -2.4 116.5|
| | |
IGS00P36.snx ngs10797.snx |IISC A ----| -4.2 4.3 -57.1|
| | |
IGS00P36.snx sio10797.snx |JAMA A ----| -3.5 0.6 114.4|
IGS00P36.snx sio10797.snx |LAMA A ----| 36.0 -1.4 -5.4|
| | |
IGS00P36.snx sio10797.snx |ANKR A ----| -9.9 20.7 -11.5|
IGS00P36.snx sio10797.snx |COCO A ----| 4.3 -31.0 4.9|
| | |
IGS00P36.snx mit1079g.snx |COCO A ----| 5.7 -34.9 7.6|
IGS00P36.snx mit1079g.snx |JAMA A ----| -0.6 0.2 116.4|
IGS00P36.snx mit1079g.snx |LAMA A ----| 35.3 -12.8 -1.6|
| | |
IGS00P36.snx mit1079g.snx |ANKR A ----| -7.4 18.1 -17.9|
IGS00P36.snx mit1079g.snx |RAMO A ----| 7.3 19.3 -10.6|
| | |
IGS00P36.snx ncl1079g.snx |COCO A ----| 6.3 -34.7 11.5|
| | |
IGS00P36.snx igs00P1079.snx |COCO A ----| 4.8 -34.5 10.9|
IGS00P36.snx igs00P1079.snx |RAMO A ----| 5.4 17.1 -7.0|
-----------------------------------------|------------|-----------------------|
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
12353M001 YAKZ A YAKZ A YAKZ A YAKA A YAKA A
13407S012 MADR A MADR A MADR A MAD2 A MADR A MADR A
40114M001 NRC1 A 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
42005M001 GALA A GALA B GALA A GALA A GALA B GALA A GALA A GALA A
42202M005 AREQ A AREQ A 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
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 mit ncl IGS igs
============= ====== ====== ====== ======
13407S012 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 GOLD A GOLD A
GOL2 A
50103M108 TIDB A TIDB A TIDB A TIDB A
TID2 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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