[IGSREPORT-7702] Wk 1084 IGS SINEX Combination
David Hutchison
hutch at geod.nrcan.gc.ca
Thu Nov 2 13:53:17 PST 2000
******************************************************************************
IGS Electronic Report 02 Nov 17:06:19 PST 2000 Message Number 7702
******************************************************************************
Author: D. Hutchison, R. Ferland
===================================================================
Combined AC solution for GPS week 1084 - 00/10/15 to 00/10/21
===================================================================
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
igs00P1084.snx Combined weekly solution.
igs00P1084.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS00P42.snx Cumulative Combined solution.
igs00P1084.sum This file.
igs00P1084.itr Residuals between the AC and the IGS97 for the RF stations.
igs00P1084.res Residuals between the AC and the Combined Weekly solution.
IGS00P42.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 = igs00P1084.snx
IGS = IGS00P42.snx
BuA = IERS Bulletin A
emr gfz ngs sio excluded from the geocenter estimation (Sec. 5-4).
New stations in the cumulative solution IGS00P42.snx
NRIL A ---- RBAY 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 | 128 | 46 | 29.440 | 1.001 | 29.461 |
emr | 50 | 36 | 2.539 | 0.999 | 2.537 |
esa | 55 | 40 | 8.014 | 0.999 | 8.005 |
gfz | 75 | 40 | 22.521 | 0.999 | 22.493 |
jpl | 67 | 32 | 3.350 | 1.000 | 3.351 |
ngs | 74 | 48 | 20.813 | 0.995 | 20.716 |
sio | 137 | 47 | 2.056 | 0.955 | 1.963 |
igs | 139 | 50 | 1.313 | 1.055 | 1.386 |
---------------|-----|-----|---------------|---------------|---------------|
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 45 | 1.1 0.8 -0.1 | 3.1 3.9 10.0 |
emr 35 | 0.4 -1.6 0.0 | 3.5 6.3 10.6 |
esa 38 | -1.4 0.6 0.4 | 4.7 3.8 11.2 |
gfz 39 | 2.1 0.1 -0.2 | 2.4 3.4 8.3 |
jpl 31 | -0.3 1.0 0.8 | 3.0 3.9 9.9 |
ngs 46 | -3.2 0.6 -0.2 | 4.5 5.0 11.6 |
sio 46 | 0.6 -0.2 -1.0 | 2.5 4.0 9.4 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 121 | 0.0 0.9 0.1 | 3.1 2.7 9.3 |
emr 48 | -0.5 -0.8 0.1 | 2.9 6.1 5.7 |
esa 55 | -2.1 0.7 1.1 | 4.6 4.7 8.5 |
gfz 71 | 1.4 -0.2 -0.6 | 1.9 1.7 5.8 |
jpl 64 | -0.9 0.9 0.5 | 1.8 1.9 5.2 |
ngs 72 | -3.5 0.2 1.1 | 5.0 6.7 10.1 |
sio 126 | 0.1 -0.2 -0.4 | 1.7 2.4 5.8 |
ITR 49 | -0.8 0.0 -0.1 | 1.8 3.0 8.6 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 122 | 0.6 0.7 0.7 | 3.6 4.3 9.2 |
emr 49 | 0.4 -1.2 0.4 | 3.4 7.6 8.9 |
esa 55 | -1.7 0.6 1.2 | 4.3 4.6 10.5 |
gfz 71 | 1.8 0.1 0.6 | 2.5 2.9 8.0 |
jpl 64 | -0.6 1.3 1.7 | 2.5 3.1 8.4 |
ngs 73 | -2.8 0.3 1.9 | 5.4 8.1 11.6 |
sio 126 | 0.6 -0.2 0.3 | 2.4 3.5 8.9 |
igs 139 | 0.5 0.1 0.7 | 1.7 2.3 6.2 |
ITR 51 | -0.1 0.1 -0.2 | 0.9 1.3 3.9 |
---------------|---------------------------|---------------------------|
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 | 0.014 -0.024 0.013 -6.0 -7.2 -15.3 2.65 |
emr | 0.009 -0.038 -0.007 -0.7 4.9 -35.1 1.78 |
esa | 0.056 -0.002 -0.020 -8.3 17.0 -10.4 1.37 |
gfz | -0.045 0.006 0.000 -0.0 0.7 -2.7 1.33 |
jpl | -0.024 -0.026 -0.086 -2.7 4.2 -33.7 1.83 |
ngs | -0.280 0.003 0.110 -1.1 -22.7 19.3 2.31 |
sio | -0.154 0.269 0.086 -1.6 -5.6 59.2 2.06 |
---------------|---------------------------------------------------------------|
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 | 0.059 0.060 0.066 1.5 1.5 1.5 0.24 |
emr | 0.068 0.066 0.076 1.7 1.7 1.7 0.27 |
esa | 0.067 0.066 0.070 1.7 1.7 1.7 0.26 |
gfz | 0.063 0.064 0.073 1.7 1.7 1.6 0.26 |
jpl | 0.069 0.069 0.079 1.8 1.8 1.8 0.28 |
ngs | 0.059 0.060 0.066 1.5 1.5 1.5 0.24 |
sio | 0.058 0.059 0.065 1.5 1.5 1.5 0.24 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -3.3 -0.4 -26.6 | 4.9 5.0 6.7 |
---------------|---------------------------|---------------------------|
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 |
---------------|------------------------------------------------------------|
cod | --- 3.0 -28.6 -1.2 -1.0 .5 |
emr | --- -6.6 -7.9 -5.1 -2.2 7.9 |
esa | --- -3.2 .3 -3.0 -11.3 .7 |
gfz | --- 3.3 1.4 -1.2 .4 -3.4 |
jpl | --- -10.6 .2 10.0 3.4 -4.0 |
ngs | --- 70.6 15.1 143.6 19.6 86.5 |
sio | --- -1.9 -3.7 .0 -.5 -4.7 |
ITR | --- --- --- --- --- --- |
BuA | --- -5.1 -.4 -.2 28.3 -1.3 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 6.5 2.3 8.1 1.8 7.4 |
emr | --- 10.3 6.3 18.4 2.1 29.6 |
esa | --- 11.0 7.3 32.7 3.5 10.1 |
gfz | --- 7.3 1.7 4.1 3.0 10.0 |
jpl | --- 5.5 4.8 13.7 4.1 25.0 |
ngs | --- 128.4 8.9 75.1 10.3 60.4 |
sio | --- 9.2 2.8 8.9 2.4 2.9 |
ITR | --- --- --- --- --- --- |
BuA | --- 10.0 4.4 9.9 2.3 5.6 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
cod10847.snx sio10847.snx |GOPE A ----| 6.5 -15.7 56.7|
| | |
esa10847.snx ngs10847.snx |OHIG A ----| -36.2 0.7 -68.3|
| | |
ngs10847.snx sio10847.snx |RIOG A ----| 26.4 -0.9 50.3|
| | |
IGS00P41.snx gfz10847.snx |COCO A ----| 8.7 -34.4 -4.0|
| | |
IGS00P41.snx jpl10847.snx |COCO A ----| 7.6 -29.9 5.1|
IGS00P41.snx jpl10847.snx |SIO3 A ----| 3.0 2.7 93.1|
| | |
IGS00P41.snx sio10847.snx |COCO A ----| 2.1 -34.2 11.5|
| | |
IGS00P41.snx igs00P1084.snx |COCO A ----| 6.3 -38.1 5.8|
-----------------------------------------|------------|-----------------------|
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
20703S001 RAMO A ELRO A RAMO A RAMO A
RAMO A
31303M002 MAS1 A MAS1 A MASP A MAS1 A MAS1 A MAS1 A MAS1 A MAS1 A MAS1 A
24901M002 BAHR A BAHR A BAHR A BAHR A BAHR A BAHR A BAHR A BAHR A
249010M02 BAHR A
13407S012 MADR A MADR A MADR A MAD2 A MADR A MADR A
12353M001 YAKZ A YAKZ A YAKZ A YAKA A YAKA A
40405S031 GOLD A GOL2 A GOLD A GOL2 A GOL2 A GOLD A GOLD A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ 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
22306M002 IISC A IISC A IISC B IISC A IISC B IISC A IISC A IISC A
14208M001 OBER A OBER A OBER A
142080M01 OBER A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A
MISSING IERS DOMES NOS AT sio:
-----------------------------
GUAT A CLGO A NRIL A RBAY A NYA1 A
5-7-2) Station Antenna Conflicts:
================================
_______________________
|Enforcing these aliases|
|_______________________|
YAKA A: YAKZ A
GOLD A: GOL2 A
TIDB A: TID2 A
MAS1 A: MASP A
IISC A: IISC B
GALA A: GALA B
YAR1 A: YAR2 A
AREQ A: AREQ B
MADR A: MAD2 A
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 cod10847.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 jpl10847.snx (jpl).
------- --------- -- ----
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.)
=== ==== == ==== ==== ==== ==== ==== ==== ==== ==== ====
jpl NRIL A .0000 .0000 .0000 .0000 .0000 .0000 .0795 .0000 .0000
IGS NRIL A .1100 .0000 .0000 .1280 .0000 .0000 .0795 .0000 .0000
Antenna Conflicts in file sio10847.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 GOPE A .0780 .0000 -.0030 .0744 -.0031 -.0013 .0464 .0000 .0000
IGS GOPE A .1098 .0006 .0008 .1284 .0007 .0014 .0464 .0000 .0000
The following files have no antenna conflicts:
- emr10847.snx (emr)
- esa10847.snx (esa)
- gfz10847.snx (gfz)
- ngs10847.snx (ngs)
--
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