[IGSREPORT-6061] Wk 1001 Preliminary IGS SINEX Combination
R.
R.
Wed May 12 14:18:41 PDT 1999
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IGS Electronic Report Wed May 12 14:18:41 PDT 1999 Message Number 6061
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Author: R. Ferland , D. Hutchison
Subject: Wk 1001 Preliminary IGS SINEX Combination
===================================================================
Combined AC solution for GPS week 1001 - 99/03/14 to 99/03/20
===================================================================
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
igs99P1001.snx Combined weekly solution.
igs99P1001.erp Daily Earth Rotation Parameters.
IGS99P11.snx Cumulative Combined solution.
igs99P1001.sum This file.
igs99P1001.itr Residuals between the AC and the ITRF96 for the RF stations.
igs99P1001.res Residuals between the AC and the Combined Weekly solution.
IGS99P11.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 weekly combined solution was aligned to the ITRF96 of the current
epoch using a 7-parameters transformation. The cumulative combined
solution was aligned to the ITRF96 of the reference epoch using a
14-parameters transformation.
For more details, see:
Blewitt, G., Y. Bock and J. Kouba, 1994, Constructing the IGS Polyhedron
by Distributed Processing, Proceedings of the IGS workshop on the ITRF
densification, held at JPL, Pasadena, Cal., Nov. 30-Dec. 2, pp 21-36.
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:
===========
JPL = jpl1001g.snx
jpl = jpl10017.snx
itr = ITRF97 with current 47 Reference Frame stations plus
AUCK BAHR CAS1 CHAT MCM4.
JPL mit ncl itr used to quality control the weekly combination.
emr jpl 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 | 120 | 37 | 25.385 | 0.998 | 25.344 |
emr | 43 | 23 | 7.352 | 0.989 | 7.272 |
esa | 53 | 31 | 8.222 | 1.037 | 8.524 |
gfz | 61 | 31 | 17.682 | 0.995 | 17.600 |
jpl | 64 | 24 | 3.780 | 1.002 | 3.789 |
ngs | 65 | 37 | 30.965 | 0.993 | 30.750 |
sio | 123 | 35 | 3.248 | 1.016 | 3.300 |
JPL | 149 | 42 | 2.089 | 1.002 | 2.093 |
mit | 147 | 42 | 3.898 | 1.000 | 3.897 |
ncl | 87 | 35 | 2.749 | 1.004 | 2.760 |
itr | 52 | 47 | 10.000 | 0.285 | 2.852 |
---------------|-----|-----|---------------|---------------|---------------|
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 | 1.7 -1.8 -0.3 | 4.8 7.8 13.3 |
emr | -9.4 0.8 3.8 | 14.5 16.9 33.1 |
esa | 0.9 -2.3 1.0 | 6.0 17.3 14.9 |
gfz | -1.5 -0.8 1.5 | 5.9 6.4 15.0 |
jpl | -4.3 -0.6 1.5 | 6.1 5.9 14.6 |
ngs | 0.1 -1.9 -1.3 | 6.5 11.3 15.9 |
sio | -2.4 0.0 -1.2 | 5.1 8.2 17.5 |
JPL | -0.5 -1.0 1.8 | 4.9 5.8 14.1 |
mit | -0.6 -0.8 0.7 | 3.7 4.6 7.2 |
ncl | 0.2 -0.7 -0.2 | 3.2 4.4 6.3 |
itr | -0.2 0.0 -0.2 | 3.9 5.8 8.7 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to Weekly Combination:
============================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 3.8 -1.0 -1.5 | 4.3 3.6 12.6 |
emr | -7.2 0.2 2.4 | 12.3 15.7 36.7 |
esa | 3.0 -2.7 -3.9 | 6.3 14.9 21.4 |
gfz | 0.7 -0.6 -0.6 | 3.4 3.1 10.1 |
jpl | -2.1 0.8 3.0 | 3.8 2.5 6.8 |
ngs | 1.4 -1.3 -5.9 | 8.0 12.6 19.1 |
sio | -0.4 1.6 -5.1 | 3.0 5.2 10.5 |
JPL | 1.7 -0.2 -0.4 | 2.0 1.3 4.3 |
mit | 1.4 0.0 0.0 | 2.1 1.7 6.1 |
ncl | 1.6 0.5 -1.4 | 1.9 1.5 5.9 |
itr | 1.9 1.2 -1.1 | 3.8 3.4 11.2 |
ITR | 2.2 1.2 -0.8 | 5.0 5.8 13.1 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to Cumulative Combination:
================================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 1.4 -1.6 -3.5 | 3.3 5.4 15.1 |
emr | -9.5 0.1 -0.3 | 14.7 15.4 37.4 |
esa | 0.4 -3.0 -5.4 | 6.4 15.4 27.0 |
gfz | -1.2 -1.1 -2.4 | 3.7 4.2 13.0 |
jpl | -4.9 0.7 0.2 | 6.9 3.8 11.2 |
ngs | -1.6 -1.5 -7.8 | 9.1 13.6 23.1 |
sio | -3.0 1.1 -6.9 | 5.1 5.6 15.0 |
JPL | -0.7 -0.8 -2.3 | 2.9 3.4 10.6 |
mit | -1.0 -0.5 -1.8 | 3.3 3.9 10.1 |
ncl | -0.7 -0.1 -3.0 | 3.1 3.5 11.0 |
itr | 0.1 0.5 -1.4 | 2.5 2.7 8.9 |
igs | -2.5 -0.5 -2.0 | 3.9 3.4 9.4 |
ITR | 0.2 0.9 -1.2 | 5.2 7.2 13.4 |
---------------|---------------------------|---------------------------|
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 | -0.047 0.026 0.008 11.7 -5.5 19.0 1.39 |
emr | 0.084 0.059 -0.091 -34.9 -0.0 451.9 2.90 |
esa | 0.015 -0.101 -0.008 -5.0 -1.9 2.2 2.19 |
gfz | -0.028 0.013 0.018 1.4 1.2 -0.9 0.12 |
jpl | 0.105 -0.095 0.090 7.1 19.8 39.4 0.51 |
ngs | -0.046 0.565 0.007 -4.9 7.0 157.2 2.47 |
sio | -0.277 0.453 0.073 -1.0 8.4 189.2 1.03 |
JPL | 0.003 0.119 0.043 -0.9 2.6 -0.6 0.91 |
mit | -0.004 0.010 0.022 0.5 0.6 -0.7 0.52 |
ncl | 0.013 -0.008 0.043 0.9 1.4 -2.1 0.74 |
itr | -0.158 0.259 0.057 -0.6 -0.6 14.2 -1.40 |
---------------|---------------------------------------------------------------|
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 | 0.069 0.072 0.071 1.8 1.8 1.8 0.28 |
emr | 0.094 0.090 0.091 2.4 2.4 2.3 0.36 |
esa | 0.082 0.084 0.078 2.1 2.1 2.0 0.32 |
gfz | 0.076 0.077 0.079 2.0 2.0 1.9 0.30 |
jpl | 0.088 0.090 0.088 2.3 2.3 2.3 0.35 |
ngs | 0.076 0.080 0.072 2.0 2.0 1.9 0.30 |
sio | 0.077 0.082 0.072 2.0 2.0 1.9 0.30 |
JPL | 0.064 0.067 0.068 1.7 1.7 1.7 0.26 |
mit | 0.064 0.067 0.068 1.7 1.7 1.7 0.26 |
ncl | 0.076 0.081 0.072 2.0 2.0 1.9 0.30 |
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 | -1.0 2.0 0.4 | 1.8 1.8 2.2 |
---------------|---------------------------|---------------------------|
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 | --- -9.8 2.7 -.1 25.6 .6 |
emr | --- -14.7 -3.0 82.9 -28.6 6.3 |
esa | --- -2.6 -2.5 .2 -16.0 9.4 |
gfz | --- 15.3 -1.8 -.3 15.0 -3.8 |
jpl | --- -3.4 -2.5 10.9 -13.2 29.8 |
ngs | --- -261.6 10.5 -39.4 -19.0 -68.3 |
sio | --- --- --- --- --- --- |
JPL | --- --- --- --- --- --- |
mit | --- -18.2 2.9 -1.7 -19.3 1.1 |
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 | --- 17.6 5.9 11.5 27.0 37.8 |
emr | --- 25.7 12.4 97.4 34.1 39.7 |
esa | --- 17.8 8.8 30.9 19.3 32.5 |
gfz | --- 16.3 4.3 11.7 15.6 12.4 |
jpl | --- 26.4 9.0 25.0 13.7 37.3 |
ngs | --- 323.6 16.6 96.6 22.7 99.0 |
sio | --- --- --- --- --- --- |
JPL | --- --- --- --- --- --- |
mit | --- 18.6 4.2 10.5 19.7 14.2 |
ncl | --- --- --- --- --- --- |
itr | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Treshold set at 5 sigmas
Solution Solution | Station| dp dl dh |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF96_IGS_RS47.snx jpl10017.snx |MADR A ----| -16.9 -2.3 6.6|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
STATIONS WITH INCONSISTENT ANTENNA ECCENTRICITY INFORMATION:
(FILE: / STATION / L1 (UNE) / L2 (UNE) / ECCENTRICITY (UNE))
(UNE = Up North East (metres))
jpl1001g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 1.676 .000 .000
mit1001g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl1001g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
mit1001g.snx: BISH .110 .000 .000 .128 .000 .000 .009 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl1001g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit1001g.snx: INEG .081 .000 -.001 .078 -.002 .004 .100 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl1001g.snx: WUHN .110 .000 .000 .128 .000 .000 2.355 .000 .000
mit1001g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
ncl1001g.snx: WUHN .110 .000 .000 .128 .000 .000 2.355 .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.
jpl1001g.snx: BARB .000 .000 .000 .000 .000 .000 .000 .000 .000
jpl1001g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
jpl1001g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl1001g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl1001g.snx: TROM .078 .000 .000 .096 .000 .000 2.369 .000 .000
FILE ncl1001g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl1001g.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, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: NYAL
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl1001g.snx :
Stations: KERG KOSG LHAS MAS1 THU1
FOR THE FILE mit1001g.snx, UT WAS DELETED & THE A PRIORI COVARIANCE MATRIX
WAS SCALED UPWARD (ALL ELEMENTS) BY 0.0005% PRIOR TO DECONSTRAINING.
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit1001g.snx :
Stations: HART KERG KOSG LHAS MAS1 THU1
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl1001g.snx :
Stations: BRAZ CAS1 DAV1 HART HOB2 KERG KOSG LHAS MAC1 MAD2 MAS1 OHIG THU1 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
40472S004 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
HART A
HAR1 A
22306M002 IISC A IISC A IISC A
IIS1 A
13407S012 MAD2 A MAD2 A
MADR A MADR A
12309M002 MDVO A MDVO A
MDV1 A
12309M001 MDVO A
50103M108 TID2 A TID2 A TID2 A
TIDB A TIDB A TIDB A
50107M004 YAR1 A YAR1 A YAR1 A
YAR2 A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
ALIC A BAKO A BISH A ELAT A GILB A INEG A KABR A KARR A KATZ A MAW1 A
RAMO A RIOG A TELA A URUM A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
RIOG A TAEJ A BISH A KATZ A GILB A KABR A ELAT A TELA A
SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN ABBREVIATED .ssc FILES:
cod10017.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr10017.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa10017.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz10017.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl10017.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs10017.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio10017.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
(ENTRIES APPEAR ONLY WHERE ACS DIFFER.)
IERS DOMES NO COD NRCan ESA GFZ JPL NGS SIO
============= ====== ====== ====== ====== ====== ====== ======
50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
22306M002 IISC A IISC B IISC A IISC A IISC B IISC A
12309M002 MDVO A MDVO B MDVO A MDVO A
12355M002 PETR A PETP A PETP A PETP A PETP A
40472S004 AMCT A AMC2 A
40472S003 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
30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ B AREQ A
22601M001 NTUS A NTUS A NTUS A
22601M002 NTUS A
13407S012 MADR A MAD2 A MADR A MAD2 A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
BISH A RIOG A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
RAMO A URUM A
MISSING IERS DOMES NOS AT NGS:
-----------------------------
BAKO A
MISSING IERS DOMES NOS AT SIO:
-----------------------------
TAEJ A KATZ A GILB A KABR A ELAT A TELA A
[Mailed From: Remi Ferland <ferland at geod.nrcan.gc.ca>]
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