[IGSREPORT-6138] Wk 1008 Preliminary IGS SINEX Combination
R.
R.
Thu Jun 3 14:16:49 PDT 1999
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IGS Electronic Report Thu Jun 3 14:16:49 PDT 1999 Message Number 6138
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Author: R. Ferland , D. Hutchison
Subject: Wk 1008 Preliminary IGS SINEX Combination
===================================================================
Combined AC solution for GPS week 1008 - 99/05/02 to 99/05/08
===================================================================
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
igs99P1008.snx Combined weekly solution.
igs99P1008.erp Daily Earth Rotation Parameters.
IGS99P18.snx Cumulative Combined solution.
igs99P1008.sum This file.
igs99P1008.itr Residuals between the AC and the ITRF96 for the RF stations.
igs99P1008.res Residuals between the AC and the Combined Weekly solution.
IGS99P18.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
ITRF96 Reference Frame (RF) stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/ITRF96_IGS_RS47.SNX.Z
3-4) The AC are compared to ITRF, 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 ITRF96 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the ITRF96 of the reference epoch
using a 14-parameters transformation and the 47 ITRF station positions
and velocities.
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:
===========
igs = igs99P1008.snx
IGS = IGS99P18.snx
JPL = jpl1008g.snx
jpl = jpl10087.snx
ITR = ITRF96_IGS_RS47.SNX
itr = ITRF97 with the current 47 Reference Frame stations plus
AUCK BAHR CAS1 CHAT MCM4.
JPL mit ncl itr are used to quality control the weekly combination.
emr gfz ngs sio excluded from the geocenter estimation (Sec. 5-4).
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 | 114 | 39 | 33.266 | 1.002 | 33.335 |
emr | 44 | 27 | 5.662 | 1.000 | 5.664 |
esa | 51 | 34 | 6.763 | 1.000 | 6.761 |
gfz | 64 | 33 | 19.222 | 1.001 | 19.239 |
jpl | 54 | 23 | 3.786 | 1.000 | 3.788 |
ngs | 70 | 42 | 36.599 | 1.006 | 36.827 |
sio | 117 | 39 | 2.432 | 1.000 | 2.433 |
JPL | 137 | 44 | 1.892 | 1.000 | 1.892 |
mit | 137 | 41 | 4.073 | 1.000 | 4.073 |
ncl | 82 | 38 | 2.774 | 1.005 | 2.787 |
itr | 51 | 47 | 10.000 | 0.322 | 3.216 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & R.M.S. :
========================================================
5-2-1) With respect to ITRF96 Reference Frame stations:
=========================================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 1.8 -2.1 -0.8 | 4.9 7.5 13.0 |
emr | -6.0 -0.5 -1.2 | 9.4 11.4 19.6 |
esa | -1.6 -1.6 -0.4 | 6.0 10.3 16.9 |
gfz | -1.5 -1.0 1.3 | 6.1 6.0 12.9 |
jpl | 1.0 -0.2 0.4 | 6.1 7.8 11.2 |
ngs | -3.4 0.8 1.4 | 13.2 13.4 16.8 |
sio | -3.4 -1.3 0.3 | 6.2 8.9 14.2 |
JPL | -1.3 -1.6 1.5 | 4.8 7.9 11.2 |
mit | -0.3 -0.8 0.5 | 3.9 5.2 6.6 |
ncl | -0.4 -0.8 0.2 | 4.0 4.8 5.6 |
itr | -0.3 0.0 -0.5 | 4.2 6.2 9.1 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to Weekly Combination:
============================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 3.5 -0.3 -2.0 | 4.5 3.4 9.0 |
emr | -4.3 0.9 -1.9 | 6.9 8.9 16.0 |
esa | 0.5 -0.1 -2.2 | 4.9 9.2 14.9 |
gfz | 0.9 0.7 -0.5 | 2.9 2.8 7.9 |
jpl | 3.8 1.3 0.9 | 5.0 3.0 7.3 |
ngs | -2.1 2.1 0.7 | 11.2 12.3 14.7 |
sio | -1.8 0.4 -1.6 | 2.7 5.2 6.9 |
JPL | 0.5 -0.1 1.0 | 1.3 1.7 4.4 |
mit | 1.2 0.9 -0.4 | 2.4 3.0 8.6 |
ncl | 1.6 1.3 -0.5 | 2.0 2.2 5.2 |
itr | 1.8 1.7 -1.6 | 3.7 5.0 9.0 |
ITR | 1.8 2.1 -1.5 | 5.5 7.6 12.3 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to Cumulative Combination:
================================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 1.1 -1.9 -1.6 | 4.2 4.4 12.6 |
emr | -6.0 -0.1 -2.6 | 8.7 8.3 19.5 |
esa | -1.4 -1.3 -1.5 | 5.5 7.7 15.4 |
gfz | -0.8 -0.7 -0.1 | 3.5 4.2 8.3 |
jpl | 2.0 0.4 0.7 | 4.2 5.8 10.2 |
ngs | -3.6 0.3 0.6 | 11.4 13.7 15.1 |
sio | -4.0 -1.2 -1.4 | 5.0 7.1 10.6 |
JPL | -1.7 -1.4 1.6 | 2.9 4.4 9.0 |
mit | -1.0 -0.6 0.4 | 2.8 4.0 11.3 |
ncl | -0.2 -0.2 -0.5 | 2.6 4.1 7.9 |
itr | 0.1 0.1 -0.6 | 2.7 2.8 9.2 |
igs | -2.1 -1.4 0.5 | 2.9 4.1 8.5 |
ITR | 0.4 0.8 -0.8 | 5.5 7.5 13.7 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> ITRF96_IGS_RS47.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 | -0.048 0.021 -0.003 11.0 2.5 31.0 1.66 |
emr | 0.005 0.004 0.003 -11.3 -45.4 283.1 1.92 |
esa | -0.011 -0.016 0.055 -13.8 2.0 14.4 0.13 |
gfz | -0.009 0.066 0.034 -0.2 0.3 0.2 -0.21 |
jpl | 0.021 0.005 0.061 10.8 -13.2 45.0 0.61 |
ngs | -0.374 0.344 0.131 -4.1 -28.9 88.8 -0.53 |
sio | -0.097 0.292 0.974 -3.6 -8.9 147.7 0.98 |
JPL | -0.028 0.088 0.074 -1.4 1.1 -0.2 0.37 |
mit | -0.029 0.023 0.039 -0.2 -0.3 -0.8 0.38 |
ncl | 0.017 0.003 0.054 0.4 0.7 -1.1 0.35 |
itr | -0.160 0.261 0.057 -0.5 -0.6 14.4 -1.43 |
---------------|---------------------------------------------------------------|
5-3-2) Sigmas :
==================
Solution | R X R Y R Z T X T Y T Z SCL |
| (mas) (mas) (mas) (mm) (mm) (mm) (ppb) |
---------------|---------------------------------------------------------------|
cod | 0.068 0.071 0.070 1.8 1.8 1.7 0.27 |
emr | 0.079 0.078 0.087 2.1 2.1 2.0 0.32 |
esa | 0.071 0.072 0.075 1.8 1.8 1.8 0.28 |
gfz | 0.076 0.075 0.077 2.0 2.0 1.9 0.30 |
jpl | 0.086 0.090 0.089 2.2 2.2 2.2 0.35 |
ngs | 0.067 0.068 0.069 1.8 1.7 1.7 0.27 |
sio | 0.068 0.071 0.070 1.8 1.8 1.7 0.27 |
JPL | 0.064 0.066 0.068 1.7 1.7 1.6 0.26 |
mit | 0.066 0.067 0.070 1.7 1.7 1.7 0.26 |
ncl | 0.070 0.073 0.070 1.8 1.8 1.8 0.28 |
itr | 0.060 0.062 0.064 1.6 1.6 1.6 0.24 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 3.1 -2.0 31.2 | 4.8 4.7 7.1 |
---------------|---------------------------|---------------------------|
5-5) ERP Residuals Weighted Average & R.M.S. :
===================================================
5-5-1) Weighted Average :
============================
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- -11.1 8.8 2.4 7.1 .4 |
emr | --- -.6 17.0 -23.5 -3.6 -22.4 |
esa | --- -1.4 -13.1 -1.1 -13.5 .6 |
gfz | --- 8.5 -1.6 .0 11.2 -2.5 |
jpl | --- -22.4 .7 -17.3 9.7 -5.3 |
ngs | --- 318.4 1.0 -27.2 61.5 -52.2 |
sio | --- --- --- --- --- --- |
JPL | --- --- --- --- --- --- |
mit | --- .7 .7 -.1 -12.9 1.2 |
ncl | --- --- --- --- --- --- |
itr | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
---------------|------------------------------------------------------------|
5-5-2) R.M.S. :
==================
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 14.2 9.4 15.5 9.0 13.3 |
emr | --- 9.6 19.5 34.2 6.4 46.8 |
esa | --- 14.4 14.1 37.0 14.4 20.1 |
gfz | --- 9.7 3.4 10.1 11.2 6.4 |
jpl | --- 24.8 5.8 38.9 11.5 25.0 |
ngs | --- 332.7 7.9 46.4 61.8 63.5 |
sio | --- --- --- --- --- --- |
JPL | --- --- --- --- --- --- |
mit | --- 3.0 2.2 7.8 13.1 4.6 |
ncl | --- --- --- --- --- --- |
itr | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Threshold set at 5 sigmas
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF96_IGS_RS47.snx esa10087.snx |MADR A ----| 5.7 -44.1 40.4|
| | |
ITRF96_IGS_RS47.snx jpl10087.snx |MADR A ----| 14.9 -44.3 36.6|
| | |
ITRF96_IGS_RS47.snx jpl10087.snx |MAC1 A ----| -4.4 21.0 5.8|
| | |
ITRF96_IGS_RS47.snx sio10087.snx |MADR A ----| 4.7 -39.1 24.7|
| | |
ITRF96_IGS_RS47.snx mit1008g.snx |MADR A ----| 6.2 -43.5 29.0|
| | |
ITRF96_IGS_RS47.snx ncl1008g.snx |MAC1 A ----| 0.0 19.0 -2.1|
| | |
JPL1008g.snx itrf97_igs_rs52.snx |MADR A ----| -6.5 45.0 -26.3|
| | |
IGS99P17.snx sio10087.snx |YAKA A ----| -24.3 7.9 -8.5|
| | |
IGS99P17.snx JPL1008g.snx |WES2 A ----| 9.2 -11.6 6.2|
IGS99P17.snx JPL1008g.snx |YAKA A ----| -23.8 7.2 -12.8|
| | |
IGS99P17.snx mit1008g.snx |YAKA A ----| -23.4 7.9 -8.9|
| | |
IGS99P17.snx igs99P1008.snx |ANKR A ----| -6.7 -0.4 -3.9|
IGS99P17.snx igs99P1008.snx |MADR A ----| 11.8 -34.7 6.4|
IGS99P17.snx igs99P1008.snx |MAG0 A ----| -10.3 3.7 -10.7|
IGS99P17.snx igs99P1008.snx |VILL A ----| -6.5 -1.0 -4.6|
IGS99P17.snx igs99P1008.snx |WES2 A ----| 9.4 -10.1 2.2|
IGS99P17.snx igs99P1008.snx |YAKA A ----| -24.8 8.2 -16.7|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
STATIONS WITH INCONSISTENT ANTENNA ECCENTRICITY INFORMATION:
(FILE: / STATION / L1 (UNE) / L2 (UNE) / ECCENTRICITY (UNE))
(UNE = Up North East (metres))
jpl1008g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
mit1008g.snx: BISH .110 .000 .000 .128 .000 .000 .009 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl1008g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 1.676 .000 .000
mit1008g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl1008g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
mit1008g.snx: SUTH .110 .000 .000 .128 .000 .000 .084 .000 .000
- Both wrong. Should be L1/L2 offset, eccentricity 0.110, 0.128, 0.119 M. respectively.
jpl1008g.snx: WUHN .110 .000 .000 .128 .000 .000 2.355 .000 .000
mit1008g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
- Uncertain. Most recent log file supports an antenna height of 2.32 M., contrary to 2.355 M.
given in igs.snx. This log file gives reference point as BCR instead of customary ARP.
jpl1008g.snx: BARB .000 .000 .000 .000 .000 .000 .000 .000 .000
mit1008g.snx: GOUG .110 .000 .000 .128 .000 .000 .003 .000 .000
jpl1008g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
jpl1008g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl1008g.snx: TROM .078 .000 .000 .096 .000 .000 2.369 .000 .000
mit1008g.snx: VESL .110 .000 .000 .128 .000 .000 -.011 .000 .000
FILE ncl1008g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl1008g.snx
(MODEL / SER. NO. / L1 (UNE) / L2 (UNE))
(UNE = Up North East (metres))
DORNE MARGOLIN B ----- .078 .000 .000 .096 .000 .000
DORNE MARGOLIN B ----- .000 .000 .000 .000 .000 .000
SITES AFFECTED BY ABOVE CONFLICTS:
Stations: NYAL
STATION NAME/POINT CODES CHANGED IN mit1008g.snx
ENFORCED FROM TEMPLATE FILE igs.snx .
Old New IERS
Code/Pt Code/Pt DOMES NO
------- ------- --------
YAKZ A YAKA A 12353M001
1 Change in all.
STATION NAME/POINT CODES CHANGED IN jpl1008g.snx
ENFORCED FROM TEMPLATE FILE igs.snx .
Old New IERS
Code/Pt Code/Pt DOMES NO
------- ------- --------
YAKZ A YAKA A 12353M001
1 Change in all.
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl1008g.snx :
Stations: HART KERG LHAS MAS1
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit1008g.snx :
Stations: HART KERG LHAS MAS1
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl1008g.snx :
Stations: BRAZ HART KERG LHAS MAD2 MAS1 NYAL OHIG TROM
SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN COMPARED GNAAC FILES:
(ENTRIES APPEAR ONLY WHERE GNAACS DIFFER.)
IERS DOMES NO JPL MIT NCL
============= ====== ====== ======
40472S003 AMCT A
AMC2 A
42202M005 AREQ A AREQ A AREQ A
ARE1 A
40405S031 GOL2 A GOLD A GOL2 A
GOLD A GOL2 A GOLD A
GOL1 A
30302M007 HARK A HARK A HARK A
HAR1 A
13407S012 MAD2 A MAD2 A
MADR A MADR A
12309M002 MDVO A MDVO A
12309M001 MDVO A
50103M108 TID2 A TIDB A TID2 A
TIDB A TID2 A TIDB A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
ALIC A BAKO A BISH A KARR A MAW1 A RIOG A TOW2 A URUM A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
BISH A
SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN ABBREVIATED .ssc FILES:
(ENTRIES APPEAR ONLY WHERE ACS DIFFER.)
IERS DOMES NO COD NRC ESA GFZ JPL NOA SIO
============= ====== ====== ====== ====== ====== ====== ======
30302M007 HART B HART B HARK A HARK A HART B
22601M001 NTUS A NTUS A NTUS A NTUS A NTUS A
22601M002 NTUS A
10317M003 NYAL A NYA1 A NYA1 A NYA1 A
10317M001 NYAL A NYAL A
10302M006 TROM A TRO1 A TRO1 A
10302M003 TROM A TROM A
40472S004 AMCT A AMC2 A
40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD B GOL2 A
50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TID2 A
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
12355M002 PETR A PETP A PETP A PETP A PETP A
13407S012 MADR A MAD2 A MADR A MAD2 A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT NOA:
-----------------------------
BAKO A
[Mailed From: Remi Ferland <ferland at geod.nrcan.gc.ca>]
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