[IGSREPORT-14485] Wk 1400 IGS SINEX Combination
Remi Ferland
rferland at nrcan.gc.ca
Fri Nov 24 02:03:53 PST 2006
******************************************************************************
IGS Electronic Report 24 Nov 02:03:56 PST 2006 Message Number 14485
******************************************************************************
Author: R. Ferland , M. Bourassa
===================================================================
Combined AC solution for GPS week 1400 - 06/11/05 to 06/11/11
===================================================================
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 and at garner.ucsd.edu
igs06P1400.snx Combined weekly solution.
igs06P1400.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS06P45.snx Cumulative Combined solution.
igs06P1400.sum This file.
igs06P1400.itr Residuals between the AC and the IGS05 for the RF stations.
igs06P1400.res Residuals between the AC and the Combined Weekly solution.
IGS06P45.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
IGS05 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS05.SNX.Z
3-4) The AC are compared to IGS05, 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 IGS05 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGS05 of the reference epoch
using a 14-parameters transformation and the 132 ITRF station positions
and velocities. The IGS05 is a realization of ITRF2005.
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 = IGS03P33_RS99.SNX
igs = igs06P1400.snx
IGS = IGS06P45.snx
MIT = mit14007.snx
mit = mit1400g.snx
BuA = IERS Bulletin A
mit are used to quality control the weekly combination.
gfz ngs excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
From the original solution:
sio SATA
After unconstraining:
esa NNOR
jpl GOUG MCM4
mit CRAO NNOR SCOR WAB2
sio GOUG
igs GOUG
New stations in the cumulative solution IGS06P45.snx
GODZ A ---- MAD2 A ---- SCIP A 2 SFDM A ---- SNI1 A 3 YAR2 A ----
4-1) Starting with GPS week 1400, the solutions are aligned to the
IGS05.snx realization of ITRF2005.
4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
is included in the erp files.
4-3) Starting with this week combination, the weekly and the
cumulative solutions are aligned to the IGS realization of
ITRF2005 "IGS05.snx". See [IGSMAIL-5447] and [IGSMAIL-5455]:
http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00170.html
http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00178.html
This new realization:
1) is based on 132 globally distributed stations,
2) The coordinates originate from ITRF2005.
3) Relative to absolute antenna phase center changes were
also applied.
The coordinates for the weekly AC solutions and IGS weekly
combination also used absolute antenna phase center models.
The coordinates for the IGS cumulative solution were corrected
for the relative to absolute phase center variations. The
IGS cumulative solution was also updated to be fully consistent
with the latest discontinuity table.
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)|
---------------|-----|-----|---------------|---------------|---------------|
emr | 45 | 44 | 5.044 | 0.998 | 5.036 |
esa | 63 | 52 | 18.156 | 0.997 | 18.096 |
gfz | 180 | 109 | 5.491 | 0.995 | 5.465 |
jpl | 116 | 67 | 5.796 | 1.003 | 5.813 |
MIT | 149 | 92 | 2.909 | 0.993 | 2.890 |
ngs | 187 | 106 | 28.192 | 0.993 | 27.988 |
sio | 159 | 106 | 2.762 | 0.995 | 2.747 |
mit | 260 | 118 | 1.379 | 0.998 | 1.376 |
igs | 265 | 121 | 1.284 | 0.984 | 1.263 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to the IGS05 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
emr 44 | 0.8 0.0 0.0 | 3.3 2.6 8.9 |
esa 52 | -0.8 0.1 -0.5 | 3.6 2.3 11.8 |
gfz 109 | -0.5 0.1 -0.2 | 2.6 1.9 6.7 |
jpl 67 | 0.3 -0.2 0.6 | 2.6 2.8 11.1 |
MIT 92 | 0.1 -0.0 -0.1 | 2.7 2.1 6.7 |
ngs 106 | -0.5 0.1 0.1 | 2.9 2.7 6.4 |
sio 106 | -0.1 -0.1 0.1 | 2.6 3.6 10.1 |
mit 118 | -0.3 0.1 0.6 | 2.2 2.0 7.1 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
emr 45 | 1.0 0.2 -1.1 | 1.7 1.5 6.5 |
esa 62 | -0.0 0.4 -0.5 | 2.4 2.0 13.1 |
gfz 177 | -0.1 0.1 -0.6 | 0.9 1.1 3.3 |
jpl 113 | 0.7 -0.2 -1.0 | 1.8 1.8 9.0 |
MIT 139 | 0.3 0.1 -0.5 | 1.4 1.2 4.1 |
ngs 180 | -0.1 0.0 0.2 | 1.6 2.0 4.3 |
sio 153 | 0.5 0.0 -0.3 | 1.7 2.7 5.9 |
mit 237 | 0.2 0.1 0.7 | 0.8 1.2 4.5 |
ITR 120 | 0.5 -0.0 -0.3 | 2.3 2.0 6.4 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
emr 44 | 0.3 -0.2 -0.6 | 3.0 2.5 7.4 |
esa 61 | -0.5 -0.0 0.0 | 3.7 3.3 13.5 |
gfz 164 | -1.0 0.1 -0.3 | 2.1 1.7 6.0 |
jpl 100 | -0.3 -0.4 -0.4 | 2.6 2.9 11.4 |
MIT 133 | -0.5 0.0 -0.3 | 2.6 2.5 5.8 |
ngs 153 | -1.1 0.4 0.5 | 2.5 3.3 6.7 |
sio 142 | -0.6 -0.2 0.6 | 2.5 3.6 8.9 |
mit 195 | -0.8 0.3 1.3 | 2.1 2.7 6.8 |
igs 215 | -0.9 0.1 0.6 | 1.8 1.8 5.4 |
ITR 128 | -0.2 0.1 -0.1 | 1.5 1.2 5.0 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS03P33_RS99.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) |
---------------|---------------------------------------------------------------|
emr | 0.042 -0.014 -0.004 -7.9 1.3 -4.2 -0.23 |
esa | -0.014 -0.024 0.014 -3.7 6.4 -25.2 -0.80 |
gfz | -0.006 -0.021 0.011 0.5 0.8 -0.2 -0.63 |
jpl | 0.208 -0.072 0.320 0.2 4.0 14.1 0.14 |
MIT | 0.007 -0.000 0.001 4.7 11.0 -4.9 -0.01 |
ngs | 0.061 -0.057 0.009 4.8 4.6 5.6 -1.09 |
sio | 0.079 -0.074 0.131 6.5 6.6 35.3 2.12 |
mit | 0.002 0.007 -0.002 0.1 0.3 1.0 -1.36 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.11 |
---------------|---------------------------------------------------------------|
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) |
---------------|---------------------------------------------------------------|
emr | 0.057 0.061 0.064 1.5 1.5 1.5 0.24 |
esa | 0.052 0.055 0.060 1.4 1.4 1.4 0.22 |
gfz | 0.038 0.039 0.042 1.0 1.0 1.0 0.16 |
jpl | 0.048 0.051 0.053 1.3 1.3 1.3 0.20 |
MIT | 0.041 0.043 0.045 1.1 1.1 1.1 0.17 |
ngs | 0.038 0.041 0.043 1.0 1.0 1.0 0.16 |
sio | 0.038 0.040 0.042 1.0 1.0 1.0 0.16 |
mit | 0.036 0.038 0.041 1.0 1.0 1.0 0.15 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 1.06 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 1.8 8.6 1.4 | 3.3 3.4 4.7 |
---------------|---------------------------|---------------------------|
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 |
---------------|------------------------------------------------------------|
emr | --- 11.8 -1.6 -2.4 -5.0 -1.3 |
esa | --- -7.3 0.4 --- -6.3 --- |
gfz | --- -5.9 2.8 -10.2 -1.0 -2.7 |
jpl | --- 3.4 1.2 -13.1 -3.8 -1.8 |
MIT | --- 4.4 -0.2 0.4 -2.3 -1.4 |
ngs | --- 22.8 -12.7 34.9 11.6 -42.8 |
sio | --- 31.5 3.7 -0.1 -5.1 -0.1 |
mit | --- 13.5 5.9 -6.8 -1.7 5.0 |
ITR | --- --- --- --- --- --- |
BuA | --- 12.2 -10.1 -0.5 26.9 -1.1 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
emr | --- 5.4 3.4 16.1 2.8 7.5 |
esa | --- 15.0 3.6 --- 1.7 --- |
gfz | --- 7.4 2.4 9.6 1.0 6.7 |
jpl | --- 15.9 2.7 20.0 2.3 15.6 |
MIT | --- 9.0 2.1 7.4 2.7 8.3 |
ngs | --- 15.0 5.5 18.9 3.7 29.6 |
sio | --- 3.1 2.8 6.4 1.4 8.8 |
mit | --- 9.8 4.7 8.5 6.9 18.4 |
ITR | --- --- --- --- --- --- |
BuA | --- 23.6 2.9 16.8 7.3 26.6 |
---------------|------------------------------------------------------------|
5-6) Satellite Antenna Offset Residuals weighted Average & STD :
=====================================================================
Solution | Weighted Average (mm) | STD (mm) |
| X Y Z | X Y Z |
---------------|---------------------------|---------------------------|
emr 30 | 66.5 | 33.3 |
esa 0 | --- | --- |
gfz 0 | --- | --- |
jpl 0 | --- | --- |
MIT 0 | --- | --- |
ngs 0 | --- | --- |
sio 0 | --- | --- |
mit 0 | --- | --- |
---------------|---------------------------|---------------------------|
5-7) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF_IGS05.snx gfz14007.snx |VESL A 1| -0.4 -3.0 -50.6|
| | |
ITRF_IGS05.snx jpl14007.snx |ASPA A 1| -2.2 3.1 -47.4|
| | |
ITRF_IGS05.snx sio14007.snx |NOVJ A 1| 6.3 -2.2 60.4|
ITRF_IGS05.snx sio14007.snx |TRO1 A 4| 1.0 1.2 -23.2|
| | |
ITRF_IGS05.snx mit1400g.snx |NOVJ A 1| 3.3 0.6 54.1|
| | |
MIT14007.snx sio14007.snx |OUSD A 1| 4.0 -10.8 -51.6|
| | |
MIT14007.snx mit1400g.snx |GOUG A 1| -0.7 -2.4 66.3|
| | |
IGS06P44.snx gfz14007.snx |MSKU A 1| -13.1 15.3 -11.5|
| | |
IGS06P44.snx ngs14007.snx |YAKT A 1| 2.0 -12.9 -6.7|
| | |
| | |
IGS06P44.snx igs06P1400.snx |BAKO A 7| -9.3 0.4 -4.4|
IGS06P44.snx igs06P1400.snx |MSKU A 1| -11.7 17.7 -14.6|
IGS06P44.snx igs06P1400.snx |YAKT A 1| 4.1 -6.3 -0.5|
-----------------------------------------|------------|-----------------------|
5-8) Conflicts:
====================
IERS DOMES NO MIT emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
13407S014 MAD2 A
13407S012 MADR A MAD2 A MADR A MAD2 A MAD2 A MAD2 A
MADR A MADR A MADR A
43001M003 THU3 A
43001M002 THU3 A THU3 A THU3 A THU2 A THU3 A THU2 A THU3 A
THU3 A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
40451M123 GODE A GODE A GODE A GODE A GODE A GODE A GODE A
GODZ A GODZ A
40405S038 GOL2 A
40405S031 GOLD A GOLD A GOLD A GOL2 A GOLD A GOL2 A
GOLD A
50103M108 TIDB A TIDB A TIDB A TIDB A TID1 A TID2 A TIDB A TIDB A
TID1 A TIDB A
TID2 A
50134M002 DARR A
50134M001 DARW A DARW A DARW A DARW A DARR A DARW A DARW A
DARW A
22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A
50107M004 YAR2 A YAR2 A YAR1 A YAR1 A
YAR2 A YAR2 A
22306M002 IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
43005M002 KELY B KELY B KELY B KELY B KELY A KELY A KELY A
43401M001 BDOS A BDOS A BDOS A BDOS A
BDOS A BDOS A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
HLFX A PALM A PUR3 A MIA3 A KYW1 A MCD1 A ELEN A OUSD A MTJO A HORN A
CNCL A QUAR A KARA A MAR6 A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
PALM A
MISSING IERS DOMES NOS AT ngs:
-----------------------------
DWH1 A GODZ A HAMM A LEBA A MCN1 A MLF1 A NISU A SUTB A AZCO A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A SG21 A OUSD A CNCL A KARA A
MISSING IERS DOMES NOS AT igs:
-----------------------------
FAAA A
IERS DOMES NO mit IGS igs
============= ====== ====== ======
13407S012 MAD2 A MAD2 A MAD2 A
MADR A MADR A MADR A
43401M001 BDOS A BDOS A BDOS A
BDOS A BDOS A
43001M003 THU3 A
43001M002 THU2 A THU3 A
40451M123 GODE A GODE A GODE A
GODZ A GODZ A
40405S038 GOL2 A
40405S031 GOLD A GOLD A GOL2 A
GOLD A
50107M004 YAR2 A YAR1 A YAR1 A
YAR2 A YAR2 A
20703S001 RAMO A ELRO A RAMO A
RAMO A
30302M009 HARB A HARB A HARB A
MISSING IERS DOMES NOS AT mit:
-----------------------------
KULU A PALM A PUR3 A GODZ A MIA3 A KYW1 A MCD1 A MCN1 A LEBA A MLF1 A
HAMM A SG21 A AZCO A SFDM A SUTB A AIS1 A KOD1 A OUSD A MTJO A HORN A
CNCL A QUAR A KARA A MAR6 A
MISSING IERS DOMES NOS AT igs:
-----------------------------
FAAA A
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