[IGSREPORT-19723] Wk 1632 IGS SINEX Combination
igs-rf at ign.fr
igs-rf at ign.fr
Thu May 5 12:11:04 PDT 2011
Authors: B. Garayt, P. Rebischung
================================================================================
Combination of AC solutions for GPS week 1632 - 11/04/17 to 11/04/23
================================================================================
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
igs11P1632.snx Combined weekly solution
igs11P1632.erp Daily Earth Rotation Parameters
igs11P1632.sum This file
igs11P1632.itr Residuals between AC solutions and IGS08 for the RF stations
igs11P1632.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 = mit16327.snx
mig = mit1632g.snx
ITR = IGS08.snx
igs = igs11P1632.snx (weekly combined solution)
IGS = IGS11P16.snx (cumulative solution)
The following solutions are not used in the combination but only for
comparison:
jpl ncl
Solutions with manual station deletion:
esa DAV1 JAB2 STJ2
grg NOVM MTKA
mit NSSS POTR XIAN P066
sio FLIN OUSD
jpl NURK
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 | 243 | 107 | 53 | 8.548 |
emr | 82 | 54 | 40 | 2.258 |
esa | 138 | 60 | 43 | 2.493 |
gfz | 189 | 102 | 53 | 6.755 |
grg | 131 | 83 | 55 | 3.991 |
mit | 242 | 121 | 56 | 0.966 |
ngs | 211 | 104 | 53 | 17.930 |
sio | 285 | 129 | 55 | 1.010 |
jpl | 127 | 73 | 49 | ------ |
ncl | 449 | 120 | 58 | ------ |
igs | 410 | 143 | 58 | ------ |
---------------|-----|-----|-----|---------------|
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 107 | -0.1 -0.1 -0.1 | 2.4 2.5 8.3 |
emr 54 | 0.3 -0.2 0.1 | 2.5 3.0 7.6 |
esa 60 | 0.1 0.2 -0.1 | 2.8 2.7 9.2 |
gfz 102 | 0.1 0.1 0.0 | 2.5 2.2 8.1 |
grg 83 | 0.4 0.0 -0.1 | 3.2 2.8 8.0 |
mit 121 | -0.4 0.0 -0.0 | 2.2 2.6 7.5 |
ngs 104 | 0.1 0.1 0.2 | 3.4 3.1 7.8 |
sio 129 | -0.5 0.1 0.3 | 2.6 2.6 7.8 |
jpl 73 | 0.2 -0.0 0.4 | 2.4 3.5 9.2 |
ncl 120 | -0.3 0.1 0.1 | 2.6 2.5 7.3 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 238 | -0.1 -0.0 -0.1 | 0.7 0.6 3.0 |
emr 79 | 0.4 -0.2 0.0 | 1.7 1.2 4.2 |
esa 133 | 0.6 0.1 0.1 | 2.0 1.4 4.5 |
gfz 188 | 0.1 0.0 -0.0 | 0.6 0.9 2.3 |
grg 122 | 0.6 0.0 -0.0 | 2.1 1.7 5.0 |
mit 234 | -0.1 -0.0 -0.1 | 0.8 0.8 2.1 |
ngs 205 | 0.7 0.0 -0.0 | 1.9 1.7 3.8 |
sio 277 | -0.5 0.1 0.2 | 1.6 1.0 3.1 |
jpl 113 | 0.5 0.1 0.2 | 1.8 2.8 5.7 |
ncl 206 | -0.1 0.0 0.0 | 0.8 0.9 1.1 |
ITR 143 | 0.1 -0.0 -0.1 | 2.3 2.5 7.0 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 222 | 0.1 -0.0 -0.1 | 1.7 1.6 6.5 |
emr 79 | 0.1 -0.1 0.1 | 2.3 2.0 6.7 |
esa 128 | 1.1 0.1 0.3 | 2.7 2.1 9.1 |
gfz 183 | 0.2 0.1 -0.1 | 1.9 1.7 6.3 |
grg 122 | 1.0 0.0 -0.0 | 3.1 2.3 8.1 |
mit 233 | -0.3 -0.0 0.1 | 1.7 1.9 6.5 |
ngs 204 | 0.5 0.1 0.1 | 2.5 2.1 7.3 |
sio 269 | -0.6 0.0 0.3 | 2.6 2.1 6.9 |
jpl 114 | 0.5 0.0 0.5 | 2.6 3.3 7.8 |
ncl 203 | -0.2 0.0 0.1 | 1.9 1.9 6.1 |
igs 387 | -0.0 -0.0 0.1 | 1.9 1.8 6.2 |
ITR 182 | 0.1 -0.1 0.0 | 1.9 2.2 3.6 |
---------------|---------------------------|---------------------------|
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 | -0.038 -0.001 -0.002 -0.6 0.1 -0.4 0.21 |
emr | -0.004 0.013 -0.017 -3.6 0.8 3.9 0.63 |
esa | -0.054 0.029 0.059 -1.1 -5.2 11.8 0.22 |
gfz | -0.030 0.032 0.028 -2.8 0.1 -0.6 0.45 |
grg | -0.023 0.034 -0.018 -0.1 2.4 15.1 0.29 |
mit | -0.012 0.008 -0.017 2.4 -4.4 9.6 0.31 |
ngs | -0.033 0.012 0.015 2.5 -5.9 7.4 0.48 |
sio | -0.006 -0.073 0.015 0.5 0.1 -4.4 0.06 |
jpl | 0.006 -0.031 0.048 -2.2 5.6 7.1 -0.82 |
ncl | -0.045 0.024 -0.010 -0.3 1.2 4.9 0.26 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.33 |
---------------|---------------------------------------------------------------|
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 | 0.031 0.033 0.034 0.8 0.8 0.8 0.13 |
emr | 0.030 0.031 0.036 0.8 0.8 0.8 0.13 |
esa | 0.038 0.039 0.046 1.0 1.0 1.0 0.16 |
gfz | 0.028 0.031 0.032 0.8 0.8 0.8 0.12 |
grg | 0.029 0.032 0.034 0.8 0.8 0.8 0.12 |
mit | 0.026 0.027 0.029 0.7 0.7 0.7 0.11 |
ngs | 0.028 0.030 0.033 0.8 0.8 0.8 0.12 |
sio | 0.028 0.029 0.031 0.7 0.7 0.7 0.11 |
jpl | 0.031 0.032 0.036 0.8 0.8 0.8 0.13 |
ncl | 0.025 0.027 0.028 0.7 0.7 0.7 0.10 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.17 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 0.6 -1.8 5.6 | 0.5 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 | --- -12.2 1.4 -2.1 3.2 19.0 |
esa | --- 9.5 -2.4 -9.7 0.8 13.2 |
gfz | --- 8.3 0.1 6.5 -0.7 8.8 |
grg | --- --- 1.4 7.1 -3.7 -2.6 |
mit | --- -3.8 0.7 -1.2 -0.8 -8.5 |
ngs | --- -3.0 -2.4 -8.5 0.7 -1.1 |
sio | --- -8.3 -2.1 -12.4 5.0 -10.1 |
jpl | --- -6.6 -1.4 -1.7 0.7 9.3 |
ncl | --- --- --- --- --- --- |
BuA | --- -7.5 -3.9 2.1 0.9 -0.2 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 8.2 2.5 4.5 1.5 8.3 |
esa | --- 9.6 1.7 10.1 2.5 15.6 |
gfz | --- 17.8 2.5 4.5 2.8 7.2 |
grg | --- --- 5.4 10.9 3.1 14.0 |
mit | --- 4.2 0.7 1.7 1.1 4.7 |
ngs | --- 5.2 3.7 14.6 3.6 13.0 |
sio | --- 7.2 2.0 4.1 1.4 3.4 |
jpl | --- 7.9 1.4 10.1 2.8 16.0 |
ncl | --- --- --- --- --- --- |
BuA | --- 10.8 4.5 8.8 3.2 10.2 |
---------------|------------------------------------------------------------|
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)|
-----------------------------------------|------------|-----------------------|
| | |
emr16327.snx Combination: Iter. 1 |DAV1 A 5| 5.1 -0.5 0.4|
emr16327.snx Combination: Iter. 1 |KOKB A 5| -1.9 4.0 -4.4|
emr16327.snx Combination: Iter. 1 |MAW1 A 1| 5.3 0.2 -1.7|
esa16327.snx Combination: Iter. 1 |HOB2 A 2| -6.0 -1.3 -7.2|
grg16327.snx Combination: Iter. 1 |KIT3 A 1| 1.2 -4.6 11.8|
grg16327.snx Combination: Iter. 1 |POTS A 3| 6.5 1.8 -2.2|
grg16327.snx Combination: Iter. 1 |WIND A 2| 5.6 -2.7 2.9|
grg16327.snx Combination: Iter. 1 |AREQ A 6| -6.0 -2.5 -7.0|
grg16327.snx Combination: Iter. 1 |KERG A 3| -3.3 -5.4 -3.7|
mit16327.snx Combination: Iter. 1 |OHI3 A 2| -8.4 1.4 7.9|
sio16327.snx Combination: Iter. 1 |MQZG A 5| 5.1 -1.7 -0.0|
grg16327.snx Combination: Iter. 2 |SVTL A 3| -1.3 3.9 -1.5|
grg16327.snx Combination: Iter. 2 |URUM A 5| 4.6 -1.6 5.7|
ngs16327.snx Combination: Iter. 2 |HRAO A 3| -7.9 2.7 -1.0|
sio16327.snx Combination: Iter. 2 |CEDU A 1| 4.9 3.0 4.3|
| | |
jpl16327.snx Comp. to igs11P1632.snx |BRMU A 4| 9.5 -0.3 -12.5|
jpl16327.snx Comp. to igs11P1632.snx |SOFI A 2| 3.5 -0.8 23.8|
| | |
igs11P1632.snx Stacking: Iter. 1 |BRFT A 4| -9.8 -0.7 -1.1|
igs11P1632.snx Stacking: Iter. 1 |OHI3 A 2| 10.4 -4.9 -36.7|
| | |
-----------------------------------------|------------|-----------------------|
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
igsp ftp://igscb.jpl.nasa.gov/pub/station/pendinglogs
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
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
6-1) Receivers:
====================
AC | Station | Used Receiver | Receiver from log | Source |
----|---------|----------------------|----------------------|--------|
cod | BAKO A | LEICA GRX1200+GNSS | LEICA GRX1200GGPRO | igs |
mit | BRAZ A | NOV OEMV3 | TRIMBLE NETRS | igs |
cod | FRDN A | TPS NETG3 | AOA BENCHMARK ACT | igsp |
mit | KARR A | ASHTECH UZ-12 | TRIMBLE NETR8 | igs |
esa | LAMA A | LEICA GRX1200GGPRO | LEICA GRX1200+GNSS | igs |
mit | MAD2 A | ASHTECH Z-XII3 | ASHTECH Z-XII3T | igs |
mit | MAJU A | TRIMBLE R7 | ASHTECH UZ-12 | argn |
mit | NETT A | TRIMBLE NETRS | TRIMBLE 4000SSI | ucsd |
grg | WTZR A | LEICA GRX1200GGPRO | LEICA GRX1200+GNSS | igs |
mit | WUHN A | ASHTECH Z-XII3 | TRIMBLE NETR8 | igs |
----|---------|----------------------|----------------------|--------|
6-2) Antennas:
===================
AC | Station | Used Antenna | Antenna from log | Source |
----|---------|----------------------|----------------------|--------|
grg | AREQ A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
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 | TPSCR3_GGD DOME | TPSCR3_GGD CONE | igs |
mit | CRO1 A | ASH701945G_M JPLA | ASH701945G_M NONE | igs |
emr | DAV1 A | LEIAR25.R3 DOME | LEIAR25.R3 LEIT | igs |
grg | EPRT A | TRM29659.00 NONE | TRM29659.00 LEIS | igs |
grg | FAIR A | ASH701945G_M NONE | ASH701945G_M JPLA | igs |
cod | FRDN A | TPSCR.G3 NONE | AOAD/M_T NONE | igsp |
emr | HOFN A | TPSCR3_GGD DOME | TPSCR3_GGD CONE | igs |
grg | KIR0 A | AOAD/M_T NONE | AOAD/M_T OSOD | 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 |
mit | 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 |
mit | NETP A | TRM55971.00 NONE | TRM57971.00 NONE | cors |
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 |
sio | REDU A | ASH701945C_M UNKN | ASH701945C_M NONE | igsp |
grg | SANT A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
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 | TOW2 A | AOAD/M_T DOME | AOAD/M_T AUST | igs |
grg | TOW2 A | AOAD/M_T NONE | AOAD/M_T AUST | 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 |
----|---------|-------------------------|-------------------------|--------|
----|---------|-------------------------|-------------------------|--------|
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