[IGSREPORT-20259] Wk 1657 IGS SINEX Combination
igs-rf at ign.fr
igs-rf at ign.fr
Thu Oct 27 02:19:53 PDT 2011
Authors: B. Garayt, P. Rebischung
================================================================================
Combination of AC solutions for GPS week 1657 - 11/10/09 to 11/10/15
================================================================================
1) Contacts:
============
e-mail: igs-rf at ign.fr
Tel: 0033143988197 (Bruno Garayt)
Fax: 0033143988450
2) Products:
============
Products are available at:
CDDIS: ftp://cddis.gsfc.nasa.gov/gps/products
SOPAC: ftp://garner.ucsd.edu/pub/products
ENSG: ftp://igs.ensg.eu/pub/igs/products
IGN: ftp://igs.ign.fr/pub/igs/products
igs11P1657.snx Combined weekly solution
igs11P1657.erp Daily Earth Rotation Parameters
igs11P1657.sum This file
igs11P1657.itr Residuals between AC solutions and IGS08 for the RF stations
igs11P1657.res Residuals between AC solutions and combined weekly solution
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 name inconsistencies, etc...
3-2) Constrained AC solutions are unconstrained according to the information
given in their SOLUTION/APRIORI blocks and then minimally constrained.
AC solutions given in the form of a normal matrix are inverted by adding
minimal constraints.
3-4) The weekly AC solutions are combined. The 7-parameter singularity is
avoided by using internal constraints. Iterations are performed until no
residuals exceed 2 cm or 5 sigma.
3-5) The combined solution is compared to IGS08 propagated at current week
(datum). Some outliers may be removed from the datum. Finally, the
combined solution is aligned to the datum using a 7-parameter
transformation estimated using the IGS08 core network.
3-6) The AC solutions NOT used in the combination are compared to the combined
solution in order to identify and remove outliers.
4) Remarks:
===========
mit = mit16577.snx
mig = mit1657g.snx
ITR = IGS08.snx
igs = igs11P1657.snx (weekly combined solution)
IGS = IGS11P41.snx (cumulative solution)
The following solutions are not used in the combination but only for
comparison:
jpl mig ncl
Solutions with manual station deletion:
gfz CRAR
mit GMSD MTJO NETP OUSD TONG ULAB
ngs HAMM
sio BRMU OUSD TOW2 ULAB CRAR
mig ALAC ACOR CASC CRAR KATZ KABR ELAT TELA BOGO
5) Results:
============
5-1) AC (Variance Factor)^0.5 estimates:
=============================================
At each iteration, the variance factor for solution s is estimated by :
VF = (vs'*Ps*vs)/fs with fs = nobss - tr(As*Q*As'*Ps)
vs : residuals of solution s
Ps : weight matrix of solution s
nobss : number of observations of solution s
As : design matrix of solution s
Q : total covariance matrix
This variance factor is used to rescale the covariance matrix of solution s
for the next iteration.
Solution |# sta| #RF |#core| Final VF |
---------------|-----|-----|-----|---------------|
cod | 259 | 106 | 54 | 7.790 |
emr | 85 | 62 | 55 | 1.883 |
esa | 125 | 64 | 46 | 1.761 |
gfz | 200 | 102 | 54 | 6.057 |
grg | 132 | 75 | 52 | 4.092 |
mit | 253 | 124 | 56 | 0.874 |
ngs | 226 | 110 | 56 | 14.702 |
sio | 292 | 129 | 54 | 0.865 |
jpl | 135 | 74 | 51 | ------ |
mig | 452 | 141 | 57 | ------ |
ncl | 225 | 122 | 56 | ------ |
igs | 414 | 141 | 57 | ------ |
---------------|-----|-----|-----|---------------|
5-2) Solution Residuals weighted Average & STD:
====================================================
5-2-1) With respect to the IGS08 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 106 | 0.8 -0.2 -0.1 | 3.0 2.8 8.3 |
emr 62 | 0.6 -0.1 -0.2 | 3.2 3.3 7.2 |
esa 64 | 0.8 -0.2 -0.1 | 3.6 3.0 9.1 |
gfz 102 | 0.5 -0.1 -0.2 | 3.3 3.0 7.8 |
grg 75 | 0.3 -0.3 -0.1 | 3.4 3.1 7.4 |
mit 124 | 0.8 -0.1 -0.3 | 3.2 3.0 7.5 |
ngs 110 | 0.9 -0.0 -0.3 | 3.3 3.4 7.8 |
sio 129 | 0.6 -0.1 -0.2 | 3.1 3.0 7.2 |
jpl 74 | 0.9 -0.3 -0.4 | 3.3 4.1 8.1 |
mig 141 | 0.2 -0.1 -0.0 | 3.1 3.1 7.4 |
ncl 122 | 0.3 -0.1 -0.3 | 3.2 2.9 6.9 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 254 | -0.2 -0.0 0.0 | 0.9 0.8 3.1 |
emr 84 | -0.0 0.0 -0.1 | 0.9 0.8 3.2 |
esa 123 | -0.1 0.0 0.0 | 1.1 0.7 3.4 |
gfz 199 | -0.3 -0.0 0.0 | 0.7 0.6 2.1 |
grg 120 | 0.3 -0.0 -0.1 | 2.4 1.7 4.8 |
mit 245 | 0.2 0.0 0.0 | 0.6 0.6 1.9 |
ngs 221 | 0.3 -0.0 -0.0 | 1.1 1.5 3.0 |
sio 277 | -0.1 0.0 0.0 | 1.0 0.9 2.9 |
jpl 126 | -0.2 0.1 -0.0 | 1.2 3.3 4.4 |
mig 404 | -0.3 -0.0 0.0 | 0.3 0.6 1.6 |
ncl 225 | -0.3 -0.0 0.0 | 0.8 1.2 1.2 |
ITR 141 | -0.7 0.0 -0.0 | 3.0 3.1 7.0 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 236 | 0.4 -0.1 -0.1 | 2.0 1.9 5.8 |
emr 83 | 0.7 -0.1 -0.1 | 2.0 2.1 5.5 |
esa 119 | 0.6 -0.0 -0.1 | 2.0 1.5 6.7 |
gfz 194 | 0.2 -0.1 -0.2 | 2.2 2.0 5.7 |
grg 120 | 0.9 -0.1 -0.1 | 3.0 2.4 6.4 |
mit 244 | 0.7 -0.1 -0.2 | 2.1 2.5 5.6 |
ngs 217 | 0.8 -0.1 -0.2 | 2.4 2.3 6.3 |
sio 270 | 0.4 -0.1 -0.2 | 2.2 2.1 5.6 |
jpl 124 | 0.2 -0.1 -0.0 | 2.3 3.7 6.5 |
mig 384 | 0.2 -0.1 0.0 | 2.4 2.4 6.8 |
ncl 221 | 0.0 -0.1 -0.1 | 2.3 2.0 5.2 |
igs 389 | 0.5 -0.1 -0.2 | 1.9 2.2 5.3 |
ITR 176 | 0.0 -0.1 0.0 | 2.1 2.4 4.0 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS08
=====================================================
These transformation parameters are estimated using the IGS08 core stations
available in the AC solutions.
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 | -0.032 0.002 0.021 -0.0 0.3 0.3 -0.14 |
emr | 0.005 0.011 -0.030 -0.1 9.6 5.5 0.11 |
esa | 0.066 -0.049 0.051 0.4 5.9 9.0 -0.24 |
gfz | -0.025 0.017 0.001 -0.9 0.9 -0.2 -0.12 |
grg | -0.029 0.015 0.016 -5.6 13.7 23.5 -0.20 |
mit | -0.020 0.011 -0.023 2.9 3.5 15.0 -0.04 |
ngs | -0.012 -0.027 0.025 4.9 0.8 3.5 0.17 |
sio | 0.090 -0.038 -0.022 2.0 7.0 6.4 -0.08 |
jpl | 0.011 -0.017 0.039 -3.5 8.1 7.8 0.07 |
mig | -0.033 0.025 -0.062 -1.0 0.7 0.2 0.01 |
ncl | -0.018 0.025 -0.006 -0.7 0.0 -0.5 -0.03 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.06 |
---------------|---------------------------------------------------------------|
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 | 0.029 0.031 0.033 0.8 0.8 0.8 0.12 |
emr | 0.026 0.028 0.031 0.7 0.7 0.7 0.11 |
esa | 0.038 0.040 0.042 1.0 1.0 1.0 0.15 |
gfz | 0.027 0.030 0.031 0.7 0.7 0.7 0.11 |
grg | 0.028 0.031 0.033 0.8 0.8 0.8 0.12 |
mit | 0.027 0.030 0.031 0.7 0.7 0.7 0.11 |
ngs | 0.027 0.030 0.031 0.7 0.7 0.7 0.11 |
sio | 0.027 0.029 0.031 0.7 0.7 0.7 0.11 |
jpl | 0.031 0.034 0.037 0.8 0.8 0.8 0.13 |
mig | 0.026 0.029 0.030 0.7 0.7 0.7 0.11 |
ncl | 0.026 0.028 0.029 0.7 0.7 0.7 0.11 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.14 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 0.8 7.3 9.7 | 0.4 0.4 0.6 |
---------------|---------------------------|---------------------------|
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 | --- --- --- --- --- --- |
emr | --- -5.4 5.5 6.3 0.8 9.3 |
esa | --- 16.7 -1.2 -1.8 0.4 8.7 |
gfz | --- 1.4 -2.1 -2.3 -2.1 -2.2 |
grg | --- --- 3.4 2.9 -1.2 17.5 |
mit | --- -7.2 -0.8 2.3 -0.7 -12.1 |
ngs | --- 0.5 5.0 11.5 4.8 10.6 |
sio | --- -26.0 -1.4 -20.3 2.9 -11.6 |
jpl | --- 19.4 3.0 2.3 -1.7 28.5 |
mig | --- 17.6 -0.0 -20.3 1.2 -7.8 |
ncl | --- --- --- --- --- --- |
BuA | --- 4.8 0.3 -2.8 1.7 22.3 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 3.5 2.6 5.5 1.8 8.8 |
esa | --- 7.8 2.7 5.5 1.0 15.4 |
gfz | --- 2.6 3.2 10.1 1.8 14.7 |
grg | --- --- 2.4 5.4 3.3 7.7 |
mit | --- 2.6 1.4 4.3 0.8 5.0 |
ngs | --- 6.2 6.6 7.3 3.7 24.3 |
sio | --- 2.1 1.7 5.3 1.5 5.8 |
jpl | --- 4.2 0.7 7.9 1.8 8.3 |
mig | --- 3.2 1.6 4.9 1.4 5.9 |
ncl | --- --- --- --- --- --- |
BuA | --- 19.7 5.8 6.8 3.2 10.5 |
---------------|------------------------------------------------------------|
5-6) Satellite Antenna Offset Residuals weighted Average & STD:
====================================================================
No Satellite phase center ...
5-7) Outliers:
===================
Outliers may be rejected at different stages of the processing:
- During the combination (stage 3-4)), outliers may be removed from the
weekly AC solutions. Thresholds are set to 2 cm and 5 sigma.
- During stage 3-6), outliers may be removed from the AC solutions NOT
included in the combination. Thresholds are set to 2 cm and 5 sigma.
- During the stacking of the weekly combined solution on the cumulative
solution (stage 3-7)), outliers may be removed from the weekly
solution. Thresholds are set to 3 cm and 8 sigma.
Solution Stage of rejection | Station | N E U |
|code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
esa16577.snx Combination: Iter. 1 |NOVM A 1| -7.5 0.8 -1.9|
grg16577.snx Combination: Iter. 1 |KIT3 A 1| 0.7 -6.5 17.0|
grg16577.snx Combination: Iter. 1 |NOVM A 1| 38.5 -3.3 27.3|
grg16577.snx Combination: Iter. 1 |POTS A 3| 9.3 4.1 -1.7|
grg16577.snx Combination: Iter. 1 |WIND A 2| 7.1 -0.7 1.3|
grg16577.snx Combination: Iter. 1 |SANT A 5| -3.0 14.9 -8.5|
sio16577.snx Combination: Iter. 1 |NOVM A 1| -8.0 -0.3 -3.0|
emr16577.snx Combination: Iter. 2 |YAKT A 6| 0.5 -3.4 -1.6|
grg16577.snx Combination: Iter. 2 |TIXI A 2| 2.4 -4.1 11.0|
grg16577.snx Combination: Iter. 2 |MAW1 A 1| -5.4 -0.7 4.0|
grg16577.snx Combination: Iter. 2 |OHI2 A 1| -5.5 -0.5 8.0|
grg16577.snx Combination: Iter. 2 |DAV1 A 5| -5.5 -1.6 -4.6|
grg16577.snx Combination: Iter. 2 |KERG A 3| -6.2 -4.4 -3.3|
grg16577.snx Combination: Iter. 3 |URUM A 5| 5.1 -4.8 -3.6|
grg16577.snx Combination: Iter. 4 |AREQ A 6| -3.6 -4.8 -11.1|
| | |
jpl16577.snx Comp. to igs11P1657.snx |GUAT A 1| 10.1 -0.0 -8.8|
jpl16577.snx Comp. to igs11P1657.snx |JOGJ A 1| 8.0 -13.0 45.4|
jpl16577.snx Comp. to igs11P1657.snx |NURK A 2| 20.6 1.1 1.2|
jpl16577.snx Comp. to igs11P1657.snx |OUS2 A 6| 24.5 2.3 -3.3|
mit1657g.snx Comp. to igs11P1657.snx |ISBA A 1| -2.3 1.9 27.0|
| | |
igs11P1657.snx Stacking: Iter. 1 |ALRT A 1| 2.3 7.3 2.4|
igs11P1657.snx Stacking: Iter. 1 |BRUS A 2| -4.8 6.8 -1.9|
igs11P1657.snx Stacking: Iter. 1 |ELEN A 1| -0.2 -6.2 -30.7|
igs11P1657.snx Stacking: Iter. 1 |KOSG A 2| 0.4 3.5 23.6|
igs11P1657.snx Stacking: Iter. 1 |METS A 2| -11.9 0.7 -6.4|
igs11P1657.snx Stacking: Iter. 1 |NETT A 3| 4.3 -23.6 -5.0|
| | |
-----------------------------------------|------------|-----------------------|
6) Check of metadata in AC solutions:
=====================================
Starting with week 1585, receivers, antennas and eccentricities reported in
AC solutions are checked versus station logs. Station logs are gathered
from the following sources:
igs ftp://igscb.jpl.nasa.gov/pub/station/log
igsf ftp://igscb.jpl.nasa.gov/pub/station/oldlog
epn ftp://epncb.oma.be/pub/station/log
rgp ftp://rgpdata.ign.fr/pub/logsheet
cors ftp://www.ngs.noaa.gov/cors/station_log
argn ftp://ftp.ga.gov.au/geodesy-outgoing/gnss/logs
nrcan ftp://rtopsdata.geod.nrcan.gc.ca/pub/gps/stations_log
sirgas ftp://ftp.sirgas.org/pub/gps/DGF/station/log
rbmc ftp://geoftp.ibge.gov.br/RBMC/dados/log
unavco ftp://data-out.unavco.org/pub/logs
ucsd ftp://garner.ucsd.edu/pub/docs/site_logs
ign ftp://igs.ign.fr/pub/igs/igscb/station/log
6-1) Receivers:
====================
AC | Station | Used Receiver | Receiver from log | Source |
----|---------|----------------------|----------------------|--------|
gfz | BIS2 A | AOA BENCHMARK ACT | ASHTECH Z-XII3 | cors |
sio | CAGS A | ASHTECH Z-XII3 | TRIMBLE NETR8 | igs |
esa | CHUR A | TPS NETG3 | TPS NET-G3A | igs |
sio | GOLD A | ASHTECH Z-XII3 | JPS EGGDT | igs |
esa | IQAL A | TPS NETG3 | TPS NET-G3A | igs |
sio | IQAL A | TPS NETG3 | TPS NET-G3A | igs |
mit | MAJU A | TRIMBLE R7 | ASHTECH UZ-12 | argn |
mit | NETT A | TRIMBLE NETRS | TRIMBLE 4000SSI | ucsd |
esa | RAMO A | LEICA RS500 | JAVAD TRE_G3T DELTA | igs |
esa | REUN A | TRIMBLE NETR5 | TRIMBLE NETR9 | igs |
esa | WHIT A | TPS NETG3 | TPS NET-G3A | igs |
----|---------|----------------------|----------------------|--------|
6-2) Antennas:
===================
AC | Station | Used Antenna | Antenna from log | Source |
----|---------|----------------------|----------------------|--------|
grg | ARTU A | ASH700936D_M NONE | ASH700936D_M DOME | igs |
gfz | BIS2 A | AOAD/M_T NONE | ASH700829.3 SNOW | cors |
emr | CAS1 A | AOAD/M_T DOME | AOAD/M_T AUST | igs |
grg | CAS1 A | AOAD/M_T NONE | AOAD/M_T AUST | igs |
emr | CEDU A | AOAD/M_T DOME | AOAD/M_T AUST | igs |
grg | CEDU A | AOAD/M_T NONE | AOAD/M_T AUST | igs |
emr | CONZ A | LEIAR25.R3 DOME | LEIAR25.R3 LEIT | igs |
grg | CRO1 A | ASH701945G_M NONE | ASH701945G_M JPLA | igs |
grg | EPRT A | TRM29659.00 NONE | TRM29659.00 LEIS | igs |
grg | FAIR A | ASH701945G_M NONE | ASH701945G_M JPLA | igs |
emr | HOFN A | TPSCR3_GGD DOME | TPSCR3_GGD CONE | igs |
cod | ISBA A | TRM57971.00 NONE | TRM41249.00 NONE | igs |
grg | KIR0 A | AOAD/M_T NONE | AOAD/M_T OSOD | igs |
emr | KOUC A | TRM57971.00 DOME | TRM57971.00 TZGD | igs |
grg | KOUC A | TRM57971.00 NONE | TRM57971.00 TZGD | igs |
grg | LHAZ A | ASH701941.B NONE | ASH701941.B SNOW | igs |
emr | MAC1 A | AOAD/M_T DOME | AOAD/M_T AUST | igs |
grg | MAR6 A | AOAD/M_T NONE | AOAD/M_T OSOD | igs |
emr | MAW1 A | AOAD/M_T DOME | AOAD/M_T AUST | igs |
grg | MAW1 A | AOAD/M_T NONE | AOAD/M_T AUST | igs |
grg | MCIL A | TRM29659.00 NONE | TRM29659.00 DOME | igs |
grg | MCM4 A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
grg | MDO1 A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
grg | MTKA A | ASH701073.1 NONE | ASH701073.1 SNOW | igs |
mit | NETT A | TRM55971.00 NONE | TRM29659.00 SCIS | ucsd |
grg | NRMD A | TRM57971.00 NONE | TRM57971.00 TZGD | igs |
grg | NYAL A | AOAD/M_B NONE | AOAD/M_B DOME | igs |
emr | OHI2 A | TPSCR.G3 DOME | TPSCR.G3 TPSH | igs |
grg | ONSA A | AOAD/M_B NONE | AOAD/M_B OSOD | igs |
grg | SANT A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
mit | SOLO A | ASH701945C_M NONE | ASH701945C_M SCIS | argn |
grg | SPT0 A | AOAD/M_T NONE | AOAD/M_T OSOD | igs |
grg | SYOG A | AOAD/M_T NONE | AOAD/M_T DOME | igs |
grg | THU3 A | ASH701073.1 NONE | ASH701073.1 SCIS | igs |
emr | VESL A | TRM29659.00 DOME | TRM29659.00 TCWD | igs |
grg | VIS0 A | AOAD/M_T NONE | AOAD/M_T OSOD | igs |
grg | WSRT A | AOAD/M_T NONE | AOAD/M_T DUTD | igs |
----|---------|----------------------|----------------------|--------|
6-3) Eccentricities:
=========================
AC | Station | Used Eccentricity | Eccentricity from log | Source |
----|---------|-------------------------|-------------------------|--------|
mit | VBCA A | 1.0707 0.0000 0.0000 | 0.0000 0.0000 0.0000 | sirgas |
----|---------|-------------------------|-------------------------|--------|
6-4) No station logs found for:
====================================
CRAR A 66001M004
CTWN A M
JOGJ A 23109M001
MCCJ A M
TIXG A 12360M001
UNB3 A 40146M002
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