[IGSREPORT-21062] Wk 1698 IGS SINEX Combination
igs-rf at ign.fr
igs-rf at ign.fr
Thu Aug 9 13:11:15 PDT 2012
Authors: A. Duret, B. Garayt, P. Rebischung
================================================================================
Combination of AC solutions for GPS week 1698 - 12/07/22 to 12/07/28
================================================================================
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
igs12P1698.snx Combined weekly solution
igs12P1698.erp Daily Earth Rotation Parameters
igs12P1698.sum This file
igs12P1698.itr Residuals between AC solutions and IGS08 for the RF stations
igs12P1698.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 = mit16987.snx
mig = mit1698g.snx
ITR = IGS08.snx
igs = igs12P1698.snx (weekly combined solution)
IGS = IGS12P30.snx (cumulative solution)
The following solutions are not used in the combination but only for
comparison:
mig ncl
Solutions with manual station deletion:
cod SMST
esa GUAT CGGN TSK2 ALRT HOLM TXES
gfz CRAR
grg NOVM
sio MAS1 CRAR CANT ROAP GODE
jpl GUAT KIRI HARV YAKT AREQ LAUT
mig CRAR KATZ KABR ELAT TELA
ncl MIZU
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 | 261 | 94 | 49 | 0.010 |
emr | 82 | 49 | 45 | 1.965 |
esa | 175 | 70 | 44 | 1.596 |
gfz | 195 | 95 | 50 | 5.559 |
grg | 124 | 71 | 47 | 2.513 |
mit | 251 | 114 | 52 | 0.826 |
ngs | 257 | 100 | 52 | 12.348 |
sio | 293 | 117 | 49 | 0.754 |
jpl | 142 | 69 | 42 | 2.352 |
mig | 484 | 128 | 53 | ------ |
ncl | 200 | 109 | 52 | ------ |
igs | 449 | 128 | 53 | ------ |
---------------|-----|-----|-----|---------------|
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 94 | 0.9 0.2 0.1 | 3.8 3.4 7.8 |
emr 49 | 1.3 0.1 0.0 | 4.1 4.4 8.1 |
esa 70 | 1.4 -0.0 -0.2 | 3.9 4.2 8.1 |
gfz 95 | 1.4 0.1 0.1 | 4.3 3.8 9.1 |
grg 71 | 1.5 0.2 -0.3 | 4.0 4.2 8.3 |
mit 114 | 1.1 0.4 0.0 | 4.0 4.2 8.1 |
ngs 100 | 1.1 0.3 -0.0 | 3.9 4.2 8.4 |
sio 117 | 1.0 0.3 -0.1 | 3.8 3.6 7.8 |
jpl 69 | 1.7 0.3 0.4 | 4.1 3.8 9.0 |
mig 128 | 0.6 0.2 -0.0 | 3.8 3.8 7.6 |
ncl 109 | 1.1 0.3 -0.1 | 4.1 4.0 8.5 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 253 | -0.3 0.0 -0.0 | 1.1 0.9 2.8 |
emr 81 | 0.2 0.0 -0.1 | 1.2 0.9 3.0 |
esa 166 | 0.1 -0.1 -0.1 | 0.8 0.9 3.4 |
gfz 191 | 0.1 -0.1 0.0 | 0.5 0.7 2.1 |
grg 120 | 0.8 -0.1 -0.2 | 1.0 1.1 4.1 |
mit 250 | 0.1 0.0 -0.0 | 0.8 0.6 1.9 |
ngs 252 | 0.2 0.1 0.0 | 1.1 1.6 2.6 |
sio 274 | -0.5 -0.0 -0.0 | 1.0 0.8 2.8 |
jpl 130 | 0.1 0.0 0.0 | 1.1 1.1 3.7 |
mig 440 | -0.6 0.0 -0.0 | 0.3 0.3 1.3 |
ncl 199 | -0.1 0.0 0.0 | 0.7 0.7 2.5 |
ITR 128 | -1.3 -0.2 0.1 | 3.8 3.8 7.8 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 240 | 0.7 0.1 0.0 | 2.1 3.3 5.3 |
emr 80 | 0.9 0.0 -0.1 | 2.5 3.6 5.1 |
esa 164 | 1.1 -0.1 -0.3 | 2.3 3.6 5.9 |
gfz 190 | 1.1 0.0 -0.1 | 2.5 3.6 5.6 |
grg 119 | 1.6 0.2 -0.3 | 2.5 3.5 7.1 |
mit 245 | 1.2 0.2 0.0 | 2.4 3.9 5.3 |
ngs 228 | 1.2 0.2 0.0 | 2.3 3.9 5.6 |
sio 263 | 0.5 0.2 -0.0 | 2.3 3.3 4.7 |
jpl 119 | 1.2 0.1 0.1 | 2.1 2.4 6.1 |
mig 394 | 0.4 0.0 -0.0 | 2.2 3.3 4.6 |
ncl 196 | 0.8 0.1 -0.2 | 2.4 2.9 5.4 |
igs 403 | 1.0 -0.0 -0.1 | 2.2 3.3 5.0 |
ITR 166 | -0.1 -0.1 0.0 | 2.6 3.0 5.3 |
---------------|---------------------------|---------------------------|
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 | -0.056 -0.015 0.005 0.8 0.9 0.5 -0.34 |
emr | -0.006 0.004 -0.011 0.4 -4.9 11.8 0.12 |
esa | -0.037 0.057 0.080 -0.8 0.2 20.4 -0.21 |
gfz | -0.041 -0.004 -0.016 -1.0 1.1 0.4 -0.34 |
grg | -0.059 0.055 -0.048 2.5 -10.6 25.4 -0.31 |
mit | -0.017 0.012 -0.042 1.5 -2.0 22.4 -0.23 |
ngs | -0.081 0.043 -0.015 -2.4 1.3 26.7 -0.12 |
sio | -0.093 0.007 0.043 -1.3 -4.2 3.2 -0.18 |
jpl | -0.037 0.037 -0.014 -0.5 -1.3 7.1 -0.13 |
mig | -0.021 0.026 -0.057 -0.5 1.1 0.0 -0.13 |
ncl | -0.042 0.025 0.008 -0.9 0.3 0.1 -0.04 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.19 |
---------------|---------------------------------------------------------------|
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 0.036 0.8 0.8 0.8 0.13 |
emr | 0.035 0.036 0.041 0.9 0.9 0.9 0.15 |
esa | 0.035 0.038 0.040 1.0 0.9 0.9 0.15 |
gfz | 0.037 0.039 0.043 1.0 1.0 1.0 0.15 |
grg | 0.033 0.035 0.041 0.9 0.9 0.9 0.14 |
mit | 0.034 0.036 0.040 0.9 0.9 0.9 0.14 |
ngs | 0.032 0.033 0.039 0.9 0.9 0.9 0.14 |
sio | 0.034 0.035 0.038 0.9 0.9 0.9 0.14 |
jpl | 0.040 0.044 0.048 1.1 1.1 1.1 0.17 |
mig | 0.031 0.033 0.037 0.8 0.8 0.8 0.13 |
ncl | 0.033 0.035 0.039 0.9 0.9 0.9 0.14 |
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 | 0.1 -2.5 17.7 | 0.2 0.2 0.5 |
---------------|---------------------------|---------------------------|
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 | --- -3.9 1.6 2.7 0.8 6.0 |
esa | --- 14.2 -0.8 4.4 -0.7 2.9 |
gfz | --- -1.6 -1.8 7.5 -0.5 -10.2 |
grg | --- --- 3.0 -5.7 -0.7 -7.6 |
mit | --- -7.7 0.1 -11.9 0.7 -0.2 |
ngs | --- -13.5 -2.3 -3.4 2.3 2.8 |
sio | --- -1.3 1.4 7.2 0.9 8.7 |
jpl | --- -5.0 -0.6 6.6 -0.3 5.7 |
mig | --- 34.9 1.2 7.3 0.7 10.9 |
ncl | --- --- --- --- --- --- |
BuA | --- -5.9 -2.7 2.0 -3.4 -3.5 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 7.4 1.6 15.2 2.0 10.6 |
esa | --- 3.0 1.3 4.0 1.5 6.6 |
gfz | --- 5.0 1.8 10.2 1.6 13.1 |
grg | --- --- 1.4 4.4 1.0 5.6 |
mit | --- 2.1 0.5 2.2 0.8 3.0 |
ngs | --- 7.2 3.4 9.6 2.3 13.8 |
sio | --- 1.6 1.0 4.2 1.5 3.6 |
jpl | --- 7.0 1.7 6.4 0.6 5.4 |
mig | --- 2.2 0.9 4.0 1.5 3.7 |
ncl | --- --- --- --- --- --- |
BuA | --- 18.9 5.8 9.5 4.7 9.6 |
---------------|------------------------------------------------------------|
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)|
-----------------------------------------|------------|-----------------------|
| | |
emr16987.snx Combination: Iter. 1 |ALRT A 1| 0.0 3.7 4.1|
esa16987.snx Combination: Iter. 1 |NOVM A 2| 0.8 -0.7 20.7|
esa16987.snx Combination: Iter. 1 |ULAB A 3| 5.9 0.3 5.2|
gfz16987.snx Combination: Iter. 1 |NOVM A 2| -0.3 -0.7 -15.8|
grg16987.snx Combination: Iter. 1 |POTS A 3| 4.8 3.6 2.1|
mit16987.snx Combination: Iter. 1 |POTS A 3| -7.2 0.8 -0.4|
sio16987.snx Combination: Iter. 1 |NOVM A 2| 0.8 -1.8 -22.5|
sio16987.snx Combination: Iter. 1 |POTS A 3| -7.1 0.2 -1.5|
cod16987.snx Combination: Iter. 2 |POTS A 3| -6.1 1.6 0.1|
gfz16987.snx Combination: Iter. 2 |ULAB A 3| 7.4 -0.2 -2.3|
grg16987.snx Combination: Iter. 2 |HNPT A 3| -4.0 0.5 -2.0|
grg16987.snx Combination: Iter. 2 |TOW2 A 2| -0.9 0.7 -12.6|
| | |
mit1698g.snx Comp. to igs12P1698.snx |MAS1 A 4| -0.3 0.4 -9.0|
mit1698g.snx Comp. to igs12P1698.snx |ULAB A 3| 0.2 4.5 0.9|
mit1698g.snx Comp. to igs12P1698.snx |NOVM A 2| -1.2 8.5 -2.6|
mit1698g.snx Comp. to igs12P1698.snx |POTS A 3| 1.7 -4.7 -1.9|
| | |
igs12P1698.snx Stacking: Iter. 1 |CONZ A 8| -3.3 8.9 -7.2|
igs12P1698.snx Stacking: Iter. 1 |CTWN A 2| -1.5 0.4 30.1|
igs12P1698.snx Stacking: Iter. 1 |CUSV A 1| 11.2 8.3 1.0|
igs12P1698.snx Stacking: Iter. 1 |DUM1 A 2| -6.0 -10.6 -6.4|
igs12P1698.snx Stacking: Iter. 1 |KOSG A 2| 6.2 7.3 9.7|
igs12P1698.snx Stacking: Iter. 1 |KUNM A 2| 7.6 9.4 -3.0|
igs12P1698.snx Stacking: Iter. 1 |METS A 2| -9.0 1.5 0.5|
igs12P1698.snx Stacking: Iter. 1 |MIZU A 9| 2.3 -18.7 3.5|
igs12P1698.snx Stacking: Iter. 1 |NETT A 3| 6.4 -23.6 -8.8|
igs12P1698.snx Stacking: Iter. 1 |NTUS A 10| 3.2 16.6 8.6|
igs12P1698.snx Stacking: Iter. 1 |PBR2 A 1| -21.2 4.5 -4.7|
igs12P1698.snx Stacking: Iter. 1 |PBRI A 1| -24.5 4.9 1.5|
igs12P1698.snx Stacking: Iter. 1 |ROTH A 1| 0.4 -8.3 -8.5|
igs12P1698.snx Stacking: Iter. 1 |TXES A 1| 1.0 -10.2 12.9|
igs12P1698.snx Stacking: Iter. 1 |XMIS A 1| 7.2 -12.3 1.1|
igs12P1698.snx Stacking: Iter. 2 |HNPT A 3| -2.1 -6.5 7.8|
| | |
-----------------------------------------|------------|-----------------------|
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 |
----|---------|----------------------|----------------------|--------|
jpl | ABMF A | TRIMBLE NETR5 | TRIMBLE NETR9 | igs |
esa | AREQ A | JAVAD TRE_G3TH DELTA | ASHTECH UZ-12 | igs |
jpl | CCJ2 A | TRIMBLE NETRS | TRIMBLE NETR9 | igs |
jpl | COCO A | TRIMBLE NETR5 | TRIMBLE NETR8 | igs |
mit | ELRO A | TPS NET-G3A | LEICA RS500 | ucsd |
jpl | GMSD A | NOV OEMV3-RT2 | TRIMBLE NETR9 | igs |
jpl | GOLD A | ASHTECH Z-XII3 | JPS EGGDT | igs |
jpl | HOLB A | LEICA GRX1200PRO | TRIMBLE NETR9 | igs |
jpl | LMMF A | TRIMBLE NETR5 | TRIMBLE NETR9 | igs |
jpl | LPGS A | AOA BENCHMARK ACT | TPS NETG3 | igs |
jpl | MORP A | TRIMBLE NETRS | TRIMBLE NETR8 | igs |
mit | NETT A | TRIMBLE NETRS | TRIMBLE 4000SSI | ucsd |
jpl | SSIA A | TRIMBLE NETRS | TRIMBLE NETR9 | igs |
jpl | STK2 A | TRIMBLE 5700 | TRIMBLE NETR9 | igs |
jpl | ULAB A | AOA SNR-8000 ACT | JAVAD TRE_G3TH DELTA | igs |
jpl | ZAMB A | ROGUE SNR-8000 | ASHTECH Z-XII3 | igs |
----|---------|----------------------|----------------------|--------|
6-2) Antennas:
===================
AC | Station | Used Antenna | Antenna from log | Source |
----|---------|----------------------|----------------------|--------|
jpl | ALBH A | AOAD/M_T NONE | AOAD/M_T SCIS | igs |
jpl | ARTU A | ASH700936D_M NONE | ASH700936D_M DOME | igs |
jpl | CAS1 A | AOAD/M_T NONE | AOAD/M_T AUST | igs |
jpl | GUAM A | ASH701945B_M NONE | ASH701945B_M JPLA | igs |
jpl | KIR0 A | AOAD/M_T NONE | AOAD/M_T OSOD | igs |
jpl | KOUC A | TRM57971.00 NONE | TRM57971.00 TZGD | igs |
jpl | MAC1 A | AOAD/M_T NONE | AOAD/M_T AUST | igs |
jpl | MAR6 A | AOAD/M_T NONE | AOAD/M_T OSOD | igs |
jpl | MCM4 A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
jpl | MDO1 A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
mit | NETT A | TRM55971.00 NONE | TRM29659.00 SCIS | ucsd |
jpl | ONSA A | AOAD/M_B NONE | AOAD/M_B OSOD | igs |
jpl | PETS A | ASH701933B_M NONE | ASH701933B_M SCIS | igs |
jpl | SYOG A | AOAD/M_T NONE | AOAD/M_T DOME | igs |
jpl | THU3 A | ASH701073.1 NONE | ASH701073.1 SCIS | igs |
jpl | TIDB A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
----|---------|----------------------|----------------------|--------|
6-3) Eccentricities:
=========================
AC | Station | Used Eccentricity | Eccentricity from log | Source |
----|---------|-------------------------|-------------------------|--------|
----|---------|-------------------------|-------------------------|--------|
6-4) No station logs found for:
====================================
BILB A 12363M002
BUEN A 41912S001
CRAR A 66001M004
CTWN A M
MCCJ A M
NLIV A M
RECT A 33804M001
TIXG A 12360M001
TLLG A 13630M001
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