[IGSREPORT-8168] Wk 1107 IGS SINEX Combination
David Hutchison
hutch at geod.nrcan.gc.ca
Thu Apr 12 20:23:00 PDT 2001
******************************************************************************
IGS Electronic Report 12 Apr 20:23:32 PDT 2001 Message Number 8168
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1107 - 01/03/25 to 01/03/31
===================================================================
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
igs01P1107.snx Combined weekly solution.
igs01P1107.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS01P13.snx Cumulative Combined solution.
igs01P1107.sum This file.
igs01P1107.itr Residuals between the AC and the IGS97 for the RF stations.
igs01P1107.res Residuals between the AC and the Combined Weekly solution.
IGS01P13.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 = igs01P1107.snx
IGS = IGS01P13.snx
BuA = IERS Bulletin A
ncl mit are used to quality control the weekly combination.
emr gfz ngs sio excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
After unconstraining:
ngs BAKO RIOG
emr NRC1 NRC2 PIMO
jpl BILI PIMO
New stations in the cumulative solution IGS01P13.snx
YAKT A ----
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 | 120 | 42 | 31.996 | 1.001 | 32.036 |
emr | 45 | 27 | 3.234 | 1.001 | 3.237 |
esa | 56 | 36 | 12.825 | 0.993 | 12.733 |
gfz | 72 | 36 | 24.438 | 1.001 | 24.462 |
jpl | 71 | 33 | 3.720 | 0.986 | 3.668 |
ngs | 73 | 46 | 20.299 | 1.001 | 20.319 |
sio | 138 | 44 | 2.398 | 1.000 | 2.398 |
ncl | 108 | 47 | 2.808 | 1.173 | 3.294 |
mit | 160 | 45 | 5.118 | 0.912 | 4.667 |
igs | 132 | 47 | 1.265 | 1.004 | 1.269 |
---------------|-----|-----|---------------|---------------|---------------|
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 40 | -0.9 -0.1 -0.4 | 4.1 3.4 10.5 |
emr 26 | -0.9 -0.1 -0.2 | 5.4 5.4 9.5 |
esa 35 | -4.1 0.5 1.7 | 10.1 6.8 18.3 |
gfz 33 | -1.2 0.0 -1.3 | 4.0 3.6 8.8 |
jpl 31 | -0.4 0.3 -0.2 | 3.2 4.0 9.4 |
ngs 44 | -3.4 0.5 -1.0 | 5.9 5.9 12.5 |
sio 41 | -1.8 -0.1 -1.7 | 3.2 4.1 14.5 |
ncl 45 | -0.5 -0.3 -0.2 | 2.7 3.1 7.4 |
mit 43 | -0.8 -0.1 -1.0 | 3.2 3.0 9.1 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 109 | 0.5 0.3 1.9 | 2.0 1.6 4.8 |
emr 41 | 0.3 1.3 -0.8 | 2.8 5.0 7.2 |
esa 53 | -3.8 0.5 -0.3 | 7.0 5.1 13.4 |
gfz 63 | -0.1 0.1 -1.9 | 1.9 2.1 6.4 |
jpl 65 | 0.0 0.9 0.1 | 1.8 1.5 7.0 |
ngs 70 | -2.7 0.4 -1.2 | 3.6 5.0 8.5 |
sio 116 | -0.4 -0.2 1.0 | 2.4 2.3 8.6 |
ncl 96 | 0.7 -0.2 1.0 | 1.4 1.4 4.1 |
mit 126 | 0.3 0.1 0.1 | 1.1 1.1 3.2 |
ITR 46 | 0.7 -0.1 -0.5 | 3.5 3.6 9.9 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 112 | -1.0 1.0 2.6 | 4.4 3.9 7.3 |
emr 42 | -0.1 0.6 -0.3 | 4.9 6.9 9.1 |
esa 55 | -4.6 0.6 0.0 | 8.9 7.2 15.5 |
gfz 64 | -1.0 0.0 -1.1 | 3.1 4.6 8.0 |
jpl 65 | -0.5 0.6 0.9 | 2.8 3.0 8.9 |
ngs 72 | -3.9 0.3 -0.9 | 5.8 7.0 10.5 |
sio 119 | -1.6 0.3 1.6 | 3.1 4.8 11.5 |
ncl 99 | -0.4 0.0 1.6 | 3.1 4.0 6.1 |
mit 128 | -0.9 0.8 0.6 | 3.4 2.8 6.1 |
igs 132 | -1.0 0.3 0.7 | 2.7 2.8 6.3 |
ITR 51 | 0.0 0.1 -0.2 | 1.2 1.9 5.1 |
---------------|---------------------------|---------------------------|
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 | -0.022 -0.042 0.014 0.2 -1.2 -3.3 2.10 |
emr | -0.015 -0.015 -0.024 3.0 -10.6 42.6 2.84 |
esa | 0.147 -0.044 0.061 -15.3 17.2 -6.6 2.67 |
gfz | -0.084 -0.001 -0.181 -1.3 0.3 -3.9 2.91 |
jpl | -0.014 0.003 -0.014 -11.8 -1.8 -32.7 2.60 |
ngs | -0.167 0.478 0.019 -31.8 -10.8 50.0 2.43 |
sio | -0.118 0.203 0.094 -2.8 -2.2 51.2 1.99 |
ncl | -0.078 0.125 -0.242 10.6 -6.2 -11.4 2.06 |
mit | -0.002 -0.019 -0.002 0.7 -0.0 0.0 2.33 |
---------------|---------------------------------------------------------------|
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 | 0.062 0.063 0.072 1.6 1.6 1.6 0.25 |
emr | 0.077 0.077 0.089 2.0 2.0 2.0 0.32 |
esa | 0.069 0.068 0.076 1.8 1.8 1.8 0.28 |
gfz | 0.069 0.068 0.079 1.8 1.8 1.8 0.28 |
jpl | 0.070 0.068 0.080 1.8 1.8 1.8 0.28 |
ngs | 0.060 0.060 0.068 1.6 1.6 1.5 0.24 |
sio | 0.063 0.062 0.070 1.6 1.6 1.6 0.25 |
ncl | 0.060 0.059 0.068 1.6 1.6 1.5 0.24 |
mit | 0.061 0.060 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 | -1.1 -0.6 -28.2 | 2.0 2.7 7.4 |
---------------|---------------------------|---------------------------|
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 | --- 5.6 .1 -2.2 -.2 .7 |
emr | --- -7.3 -6.8 8.3 1.1 -20.0 |
esa | --- -12.4 -2.5 1.6 -6.2 -.7 |
gfz | --- 8.6 4.9 -.1 1.7 -.6 |
jpl | --- -25.4 -1.3 10.8 6.5 .6 |
ngs | --- 17.6 2.2 -27.0 15.2 -12.9 |
sio | --- 1.6 8.7 -4.1 -5.4 -11.4 |
ncl | --- --- --- --- --- --- |
mit | --- 1.5 -1.5 -.6 -6.3 .1 |
ITR | --- --- --- --- --- --- |
BuA | --- 5.5 6.0 .8 25.7 .5 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 9.1 5.2 8.4 3.4 13.6 |
emr | --- 9.4 5.3 22.1 5.5 29.3 |
esa | --- 15.0 6.8 23.4 4.1 13.8 |
gfz | --- 11.3 4.3 7.3 2.8 8.6 |
jpl | --- 20.7 4.6 17.5 5.1 11.0 |
ngs | --- 42.8 16.0 62.2 10.1 84.5 |
sio | --- 10.8 3.3 6.2 3.6 15.9 |
ncl | --- --- --- --- --- --- |
mit | --- 4.8 1.7 1.9 1.0 2.1 |
ITR | --- --- --- --- --- --- |
BuA | --- 17.1 7.3 8.7 2.7 6.8 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS00P04_RS51.snx esa11077.snx |FORT A ----| -1.7 -60.3 -41.4|
IGS00P04_RS51.snx esa11077.snx |VILL A ----| -11.4 4.4 57.3|
| | |
cod11077.snx jpl11077.snx |WES2 A ----| -2.6 -1.5 -63.5|
| | |
esa11077.snx ngs11077.snx |SEY1 A ----| 10.6 -5.1 54.6|
| | |
gfz11077.snx jpl11077.snx |WES2 A ----| -2.1 -3.3 -51.2|
| | |
gfz11077.snx sio11077.snx |SANT A ----| 2.8 2.2 51.0|
| | |
jpl11077.snx ngs11077.snx |WES2 A ----| -4.5 2.0 52.1|
| | |
jpl11077.snx sio11077.snx |WES2 A ----| -1.2 2.5 51.5|
| | |
jpl11077.snx ncl1107g.snx |WES2 A ----| 2.9 3.2 54.0|
| | |
jpl11077.snx mit1107g.snx |WES2 A ----| 1.7 2.5 56.4|
| | |
igs01P1106.snx sio11077.snx |ATWC A ----| -0.4 0.7 -86.4|
| | |
igs01P1106.snx mit1107g.snx |ATWC A ----| 1.8 2.9 -87.9|
| | |
IGS01P12.snx cod11077.snx |BILI A ----| 30.6 8.7 -115.1|
| | |
IGS01P12.snx emr11077.snx |BILI A ----| 38.5 9.5 -129.2|
| | |
IGS01P12.snx jpl11077.snx |COCO A ----| 5.7 -26.4 3.4|
| | |
IGS01P12.snx jpl11077.snx |IISC A ----| -5.5 15.5 -52.9|
| | |
IGS01P12.snx sio11077.snx |BILI A ----| 38.0 10.0 -110.7|
| | |
IGS01P12.snx sio11077.snx |ASC1 A ----| 6.8 -21.3 50.4|
| | |
IGS01P12.snx mit1107g.snx |BILI A ----| 35.3 9.0 -122.0|
| | |
IGS01P12.snx mit1107g.snx |COCO A ----| 7.5 -28.6 4.2|
| | |
IGS01P12.snx igs01P1107.snx |BILI A ----| 36.7 8.6 -122.8|
IGS01P12.snx igs01P1107.snx |COCO A ----| 6.7 -27.5 -1.7|
IGS01P12.snx igs01P1107.snx |SSIA A ----| 30.0 -19.6 -2.0|
| | |
IGS01P13.snx igs01P1107.snx |ANKR A ----| -11.0 13.0 -3.2|
IGS01P13.snx igs01P1107.snx |YAKA A ----| -13.5 9.0 4.4|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
===========================
5-7-1) Station Name Conflicts:
=============================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
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 A AREQ B AREQ A AREQ A AREQ A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
13407S012 MADR A MADR A MAD2 A MADR A MAD2 A MADR A MADR A
12353M001 YAKZ A YAKZ A YAKZ A YAKA A
40405S031 GOLD A GOL2 A GOLD A GOL2 A GOL2 A GOLD A GOLD A
50103M108 TIDB A TIDB A TID2 A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
50107M004 YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A YAR1 A
YAR2 A
30314M002 SUTH A SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A SUTH A
22306M002 IISC A IISC B IISC A IISC B IISC A IISC A IISC A
22003M001 PIMO B PIMO A PIMO A PIMO A PIMO A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT sio:
-----------------------------
LHAV A
IERS DOMES NO mit ncl IGS igs
============= ====== ====== ====== ======
13407S012 MADR A 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 GOL2 A GOLD A GOLD A
GOL2 A
50103M108 TIDB A TID2 A TIDB A TIDB A
TID2 A TIDB A
12353M001 YAKZ A YAKZ A YAKA A
50107M004 YAR1 A YAR1 A YAR1 A YAR1 A
YAR2 A
12309M001 MDVO A
12309M002 MDVO A MDVO A
MISSING IERS DOMES NOS AT mit:
-----------------------------
BISH A LHAV A
5-7-2) Station Antenna Conflicts:
================================
_______________________
|Enforcing these aliases|
|_______________________|
GOLD A: GOL2 A
IISC A: IISC B
SUTH A: SUTH B
GALA A: GALA B
TIDB A: TID2 A
PIMO A: PIMO B
MADR A: MAD2 A
YAR1 A: YAR2 A
AREQ A: AREQ B
ABBREVIATIONS:
-------------
L1: L1 Offset
L2: L2 Offset
ECC: Eccentricity
-N: NORTH (Latitude)
-E: EAST (Longitude)
-U: UP (Vertical)
Compare to file IGS.SNX (IGS).
Antenna Conflicts in file cod11077.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 ngs11077.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 1.6160 .0000 .0000
IGS BAKO A .0780 .0000 -.0030 .0744 -.0031 -.0013 1.6160 .0000 .0000
ngs WUHN A .1081 .0000 .0000 .1256 .0000 .0000 2.3200 .0000 .0000
IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3200 .0000 .0000
SINEX file sio11077.snx (sio) contains no receiver or antenna information.
SINEX file mit1107g.snx (mit) contains no receiver or antenna information
for stations AMMN, ATWC, BUCU, CAGL, DRAG, MANA, PRDS, RABT and RIOP.
The following files have no antenna conflicts:
- emr11077.snx (emr)
- esa11077.snx (esa)
- gfz11077.snx (gfz)
- jpl11077.snx (jpl)
- ncl1107g.snx (ncl)
--
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