[IGSREPORT-6719] Wk 1035 Preliminary IGS SINEX Combination
R.
R.
Wed Dec 8 10:34:14 PST 1999
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IGS Electronic Report Wed Dec 8 10:34:14 PST 1999 Message Number 6719
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Author: R. Ferland , D. Hutchison
Subject: Wk 1035 Preliminary IGS SINEX Combination
===================================================================
Combined AC solution for GPS week 1035 - 99/11/07 to 99/11/13
===================================================================
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
igs99P1035.snx Combined weekly solution.
igs99P1035.erp Daily Earth Rotation Parameters.
IGS99P45.snx Cumulative Combined solution.
igs99P1035.sum This file.
igs99P1035.itr Residuals between the AC and the ITRF97 for the RF stations.
igs99P1035.res Residuals between the AC and the Combined Weekly solution.
IGS99P45.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
ITRF97 Reference Frame (RF) stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/ITRF97_IGS_RS51.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 ITRF97 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the ITRF97 of the reference epoch
using a 14-parameters transformation and the 51 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 = igs99P1035.snx
IGS = IGS99P45.snx
JPL = jpl1035g.snx
jpl = jpl10357.snx
JPL mit ncl 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 | 111 | 36 | 29.683 | 1.000 | 29.683 |
emr | 48 | 33 | 6.695 | 0.999 | 6.687 |
esa | 55 | 36 | 10.097 | 1.000 | 10.098 |
gfz | 64 | 34 | 15.514 | 1.000 | 15.514 |
jpl | 73 | 29 | 3.207 | 1.000 | 3.207 |
ngs | 72 | 45 | 27.336 | 1.000 | 27.338 |
sio | 128 | 43 | 1.783 | 1.000 | 1.783 |
JPL | 138 | 46 | 2.277 | 1.000 | 2.278 |
mit | 144 | 42 | 3.559 | 1.000 | 3.559 |
ncl | 94 | 45 | 2.318 | 1.000 | 2.318 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & R.M.S. :
========================================================
5-2-1) With respect to ITRF97 Reference Frame stations:
=========================================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | -0.3 0.2 -0.2 | 3.2 5.0 11.2 |
emr | -3.3 -2.0 2.1 | 6.0 16.7 15.9 |
esa | -6.5 1.2 1.4 | 7.9 7.8 19.4 |
gfz | -1.7 0.7 2.9 | 5.2 5.8 20.2 |
jpl | -2.0 -0.3 0.8 | 5.8 5.9 11.2 |
ngs | -1.5 0.7 2.4 | 29.3 19.1 20.8 |
sio | -1.8 0.2 -0.5 | 4.1 6.3 17.7 |
JPL | -0.4 -0.2 1.1 | 3.7 5.2 12.7 |
mit | -0.2 -0.1 1.0 | 3.0 3.1 7.7 |
ncl | 0.0 0.1 0.5 | 2.6 3.3 5.2 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to Weekly Combination:
============================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | 0.1 -0.4 -2.5 | 2.2 2.5 10.8 |
emr | -1.9 -4.3 -0.2 | 4.7 14.9 11.7 |
esa | -6.3 0.8 1.4 | 7.6 6.2 12.7 |
gfz | -0.5 -0.5 2.1 | 3.5 2.8 10.0 |
jpl | -0.9 -0.6 0.7 | 2.8 4.0 6.4 |
ngs | -1.4 0.4 2.7 | 31.7 18.6 18.4 |
sio | -1.5 0.1 -0.7 | 3.5 4.0 8.7 |
JPL | 0.9 -0.5 1.0 | 1.5 1.3 5.7 |
mit | 0.6 -0.4 2.0 | 1.7 2.3 8.1 |
ncl | 0.9 -0.3 2.5 | 1.9 2.4 8.8 |
ITR | 1.2 0.4 -1.4 | 3.6 4.6 13.0 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to Cumulative Combination:
================================================
Solution | Weighted Average (mm) | R.M.S. (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod | -1.2 0.8 -3.8 | 3.0 3.9 12.0 |
emr | -3.2 -3.8 -1.9 | 5.8 16.4 13.1 |
esa | -8.1 1.2 -0.8 | 9.4 8.8 16.6 |
gfz | -1.7 0.4 0.1 | 4.5 4.4 13.3 |
jpl | -2.2 0.3 -1.6 | 4.1 6.0 8.7 |
ngs | -2.4 1.6 0.8 | 32.4 19.6 22.8 |
sio | -2.8 1.4 -2.7 | 4.5 6.0 14.2 |
JPL | -0.4 0.5 -0.4 | 3.3 4.9 14.3 |
mit | -0.8 0.6 0.7 | 2.6 3.3 9.8 |
ncl | -0.4 0.9 0.9 | 2.5 3.6 10.9 |
igs | -1.3 0.9 -1.7 | 2.6 3.9 9.6 |
ITR | 0.3 0.2 -1.3 | 2.8 3.3 10.4 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> ITRF97_IGS_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 | 0.055 0.012 -0.067 13.0 14.8 -12.9 2.29 |
emr | -0.041 0.048 -0.020 18.0 -38.0 80.2 1.78 |
esa | 0.045 -0.047 0.025 1.0 29.7 7.2 0.98 |
gfz | -0.014 0.010 -0.043 0.3 1.2 -1.5 0.45 |
jpl | 0.056 -0.001 0.040 -13.4 8.7 -25.6 1.84 |
ngs | -0.390 0.317 0.022 -0.8 -3.9 143.8 2.26 |
sio | 0.018 -0.349 0.280 2.2 4.8 25.6 2.37 |
JPL | 0.021 -0.068 0.035 0.6 2.7 -5.0 1.56 |
mit | 0.005 -0.044 -0.029 -0.3 1.5 -3.3 1.01 |
ncl | -0.008 -0.012 0.014 -0.4 0.2 -1.4 0.48 |
---------------|---------------------------------------------------------------|
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 | 0.070 0.069 0.079 1.8 1.8 1.8 0.28 |
emr | 0.070 0.070 0.079 1.8 1.8 1.8 0.29 |
esa | 0.072 0.069 0.076 1.8 1.8 1.8 0.28 |
gfz | 0.071 0.070 0.079 1.8 1.8 1.8 0.28 |
jpl | 0.075 0.074 0.082 1.9 1.9 1.9 0.30 |
ngs | 0.061 0.061 0.068 1.6 1.6 1.6 0.24 |
sio | 0.062 0.062 0.068 1.6 1.6 1.6 0.25 |
JPL | 0.060 0.061 0.067 1.6 1.6 1.5 0.24 |
mit | 0.063 0.064 0.072 1.6 1.6 1.6 0.25 |
ncl | 0.060 0.062 0.067 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 | -4.0 11.6 -20.8 | 4.6 4.6 6.0 |
---------------|---------------------------|---------------------------|
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 | --- 5.8 -4.2 -3.5 -.1 1.9 |
emr | --- .2 9.5 55.1 -23.5 -46.5 |
esa | --- -20.1 12.1 -4.5 -13.8 .8 |
gfz | --- .4 -3.6 1.2 6.9 1.8 |
jpl | --- 34.5 7.2 23.3 .8 10.9 |
ngs | --- 282.2 -18.0 28.2 49.6 -201.8 |
sio | --- -19.5 .4 -2.8 5.7 9.3 |
JPL | --- --- --- --- --- --- |
mit | --- -9.8 2.2 -1.4 -34.6 1.0 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
---------------|------------------------------------------------------------|
5-5-2) R.M.S. :
==================
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 21.9 6.2 12.0 7.0 18.7 |
emr | --- 22.7 17.5 67.0 26.9 58.3 |
esa | --- 29.3 13.0 23.5 14.8 23.6 |
gfz | --- 14.5 6.4 15.7 8.2 17.1 |
jpl | --- 37.1 8.9 35.0 2.4 22.4 |
ngs | --- 318.7 30.1 97.0 59.4 227.4 |
sio | --- 24.8 3.7 11.1 8.5 21.8 |
JPL | --- --- --- --- --- --- |
mit | --- 11.2 3.1 5.0 34.5 4.5 |
ncl | --- --- --- --- --- --- |
ITR | --- --- --- --- --- --- |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Threshold set at 5 sigmas
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF97_IGS_RS51.snx jpl10357.snx |FAIR A ----| 0.3 -5.8 33.8|
| | |
cod10357.snx sio10357.snx |GOPE A ----| 5.5 -3.8 126.9|
| | |
sio10357.snx mit1035g.snx |GOPE A ----| 1.8 -2.1 -87.7|
| | |
IGS99P44.snx sio10357.snx |MADR A ----| 19.1 -29.5 -1.1|
| | |
IGS99P44.snx mit1035g.snx |MADR A ----| 20.4 -32.4 0.9|
| | |
igs99P1035.snx ncl1035g.snx |FAIR A ----| 1.8 0.1 -24.5|
| | |
IGS99P44.snx igs99P1035.snx |ANKR A ----| -6.7 12.9 -10.0|
IGS99P44.snx igs99P1035.snx |GOLD A ----| 0.4 8.3 -8.1|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
===========================
5-7-1) Station Name Conflicts:
=============================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
30302M007 HARK A HART B HARK A HARK A HARK A HARK A
31303M002 MAS1 A MASP B MASP A MAS1 A MAS1 A MAS1 A MAS1 A MAS1 A
12309M002 MDVO A MDVO B MDVO A MDVO A MDVO A
40114M001 NRC1 A NRC2 A NRC1 A NRC1 A NRC1 A NRC1 A
40405S031 GOL2 A GOL2 A GOL2 A GOL2 A GOL2 A GOL2 A GOL2 A GOLD A
50103M108 TID2 A TID2 A TID2 A TID2 A TID2 A TID2 A TID2 A TIDB A TIDB A
12353M001 YAKZ A YAKZ A YAKZ A YAKZ A YAKA A YAKA A
42202M005 AREQ B 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
13407S012 MAD2 A MADR A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
IERS DOMES NO JPL mit ncl IGS igs
============= ====== ====== ====== ====== ======
40405S031 GOL2 A GOL2 A GOL2 A GOLD A
30302M007 HARK A HART B HARK A HARK A
HARK A
13407S012 MAD2 A MAD2 A MADR A
31303M002 MAS1 A MAS1 A MAS1 A MAS1 A
31303M001 MAS1 A
12309M002 MDVO A MDVO A MDVO A
12309M001 MDVO A
40114M001 NRC1 A NRC2 A NRC1 A NRC1 A NRC1 A
NRC2 A NRC1 A
50103M108 TID2 A TID2 A TID2 A TIDB A TIDB A
12353M001 YAKZ A YAKZ A YAKZ A YAKA A YAKA A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT ncl:
-----------------------------
HARK A
5-7-2) Station Antenna Conflicts:
================================
_______________________
|Enforcing these aliases|
|_______________________|
TIDB A: TID2 A
YAKA A: YAKZ A
AREQ A: AREQ B
HARK A: HART B
MAS1 A: MASP B MASP A
NRC1 A: NRC2 A
IISC A: IISC B
MDVO A: MDVO B
ABBREVIATIONS:
-------------
L1: L1 Offset
L2: L2 Offset
ECC: Eccentricity
-N: NORTH (Latitude)
-E: EAST (Longitude)
-U: UP (Vertical)
Compare to file igs99P1035.snx (igs).
NOTES: Antenna model TRM14532.10 shows L1/L2, eccentricity characteristics
----- listed in latest file igs_01.pcv as shown below (agency igs). Agen-
cies cod, sio improperly associate MDVO with the characteristics of
antenna model TRM14532.00. Agency ngs antenna L1/L2 offsets for an-
model TRM14532.00 at BAKO are in error, as is its eccentricity.
Antenna Conflicts in file cod10357.snx (cod).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
cod MDVO A .0780 .0000 -.0030 .0744 -.0031 -.0013 .1456 .0000 .0000
igs MDVO A .0960 -.0016 .0009 .0944 .0016 .0041 .1456 .0000 .0000
Antenna Conflicts in file ngs10357.snx (ngs).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
ngs BAKO A .0757 .0000 .0000 .0745 .0000 .0000 1.6760 .0000 .0000
igs BAKO A .0780 .0000 -.0030 .0744 -.0031 -.0013 1.6160 .0000 .0000
Antenna Conflicts in file sio10357.snx (sio).
------- --------- -- ----
STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E
AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
sio MDVO A .0780 .0000 -.0030 .0744 -.0031 -.0013 .1456 .0000 .0000
igs MDVO A .0960 -.0016 .0009 .0944 .0016 .0041 .1456 .0000 .0000
The following files have no antenna conflicts:
- JPL1035g.snx (JPL)
- emr10357.snx (emr)
- esa10357.snx (esa)
- gfz10357.snx (gfz)
- jpl10357.snx (jpl)
- mit1035g.snx (mit)
- ncl1035g.snx (ncl)
--
[Mailed From: Remi Ferland <ferland at geod.nrcan.gc.ca>]
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