[IGSREPORT-21022] Wk 1696 IGS SINEX Combination
igs-rf at ign.fr
igs-rf at ign.fr
Thu Jul 26 07:58:18 PDT 2012
Authors: A. Duret, B. Garayt, P. Rebischung
================================================================================
Combination of AC solutions for GPS week 1696 - 12/07/08 to 12/07/14
================================================================================
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
igs12P1696.snx Combined weekly solution
igs12P1696.erp Daily Earth Rotation Parameters
igs12P1696.sum This file
igs12P1696.itr Residuals between AC solutions and IGS08 for the RF stations
igs12P1696.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 = mit16967.snx
mig = mit1696g.snx
ITR = IGS08.snx
igs = igs12P1696.snx (weekly combined solution)
IGS = IGS12P28.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 CGGN TSK2 TXES ALRT GODZ
gfz GUAT CRAR
mit GUAT GODE GODZ
sio MAS1 CGGN TSK2 HOLM CRAR ROAP HOLB NAIN ALRT GODE
jpl 0194 MAS1 LAUT KIRI KOUC SAMO ALRT HARV AREQ ALBH
mig 0194 CRAR KATZ KABR ELAT TELA
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 | 255 | 92 | 49 | 0.010 |
emr | 81 | 49 | 45 | 1.249 |
esa | 179 | 68 | 43 | 1.506 |
gfz | 195 | 96 | 50 | 5.704 |
mit | 255 | 114 | 53 | 0.806 |
ngs | 252 | 95 | 50 | 11.947 |
sio | 289 | 115 | 50 | 0.780 |
jpl | 163 | 73 | 45 | 2.330 |
mig | 494 | 129 | 53 | ------ |
ncl | 205 | 111 | 52 | ------ |
igs | 453 | 129 | 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 92 | 0.8 0.2 0.0 | 3.5 3.2 8.2 |
emr 49 | 0.6 0.1 0.0 | 4.1 3.8 7.9 |
esa 68 | 1.1 0.3 -0.2 | 4.4 3.8 7.8 |
gfz 96 | 0.7 0.2 -0.1 | 4.2 3.4 8.0 |
mit 114 | 1.1 0.4 0.3 | 3.8 3.8 8.0 |
ngs 95 | 1.3 0.2 -0.0 | 3.7 4.0 7.9 |
sio 115 | 0.7 0.3 0.0 | 4.0 3.6 7.3 |
jpl 73 | 1.4 0.2 0.4 | 3.8 3.5 9.4 |
mig 129 | 0.7 0.2 -0.1 | 3.7 3.6 7.3 |
ncl 111 | 0.8 0.3 -0.2 | 3.8 3.4 8.2 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 247 | -0.1 -0.0 -0.0 | 1.2 0.9 2.9 |
emr 78 | -0.1 0.0 0.2 | 1.4 1.1 4.1 |
esa 170 | -0.1 -0.1 0.1 | 1.0 1.0 3.0 |
gfz 190 | -0.1 -0.0 -0.0 | 0.7 0.7 2.2 |
mit 249 | 0.3 0.0 0.0 | 0.7 0.7 1.7 |
ngs 246 | 0.5 0.1 0.0 | 1.1 1.5 2.9 |
sio 265 | -0.4 -0.0 0.1 | 1.3 1.0 2.5 |
jpl 144 | 0.4 0.0 -0.0 | 1.2 1.1 3.9 |
mig 445 | -0.3 0.0 -0.0 | 0.4 0.4 1.4 |
ncl 203 | 0.0 -0.0 0.1 | 0.8 1.0 3.2 |
ITR 129 | -1.1 -0.2 0.1 | 3.6 3.6 7.4 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 234 | 0.9 0.1 0.0 | 2.0 3.0 6.0 |
emr 78 | 0.6 0.0 0.2 | 2.8 2.7 6.2 |
esa 165 | 1.0 -0.1 -0.1 | 2.5 3.5 6.3 |
gfz 189 | 0.8 0.0 -0.1 | 2.6 3.4 5.2 |
mit 244 | 1.5 0.2 0.3 | 2.4 3.6 5.7 |
ngs 223 | 1.6 0.1 0.1 | 2.3 3.6 6.0 |
sio 255 | 0.7 0.1 0.1 | 2.4 3.1 4.7 |
jpl 128 | 1.4 0.1 0.3 | 2.1 2.2 6.5 |
mig 398 | 0.9 0.0 0.1 | 2.2 3.1 4.9 |
ncl 199 | 1.0 0.1 -0.0 | 2.5 3.3 5.6 |
igs 403 | 1.2 -0.0 0.1 | 2.2 3.1 5.1 |
ITR 166 | -0.1 -0.1 0.0 | 2.5 3.0 5.2 |
---------------|---------------------------|---------------------------|
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 | -0.022 -0.015 -0.003 1.3 0.5 0.7 -0.29 |
emr | -0.003 -0.007 -0.019 -0.1 -4.4 14.4 0.16 |
esa | -0.060 0.004 0.120 -0.2 -4.2 8.2 -0.10 |
gfz | -0.022 0.012 -0.039 -0.8 0.8 0.5 -0.23 |
mit | 0.002 0.015 -0.044 3.1 -3.8 19.5 -0.18 |
ngs | -0.076 0.024 -0.000 0.4 -0.6 24.7 -0.19 |
sio | -0.037 -0.072 0.065 0.5 -3.8 -9.6 -0.10 |
jpl | 0.010 0.015 -0.001 -2.3 0.9 11.6 -0.06 |
mig | -0.012 0.019 -0.044 -0.3 1.2 0.6 -0.13 |
ncl | -0.029 0.026 0.009 -1.0 0.3 0.6 -0.09 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.13 |
---------------|---------------------------------------------------------------|
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 | 0.033 0.035 0.038 0.9 0.9 0.9 0.14 |
emr | 0.034 0.035 0.040 0.9 0.9 0.9 0.14 |
esa | 0.034 0.039 0.040 0.9 0.9 0.9 0.15 |
gfz | 0.033 0.036 0.038 0.9 0.9 0.9 0.14 |
mit | 0.034 0.036 0.039 0.9 0.9 0.9 0.14 |
ngs | 0.036 0.037 0.042 1.0 1.0 1.0 0.15 |
sio | 0.033 0.034 0.037 0.9 0.9 0.9 0.14 |
jpl | 0.038 0.039 0.044 1.0 1.0 1.0 0.16 |
mig | 0.031 0.032 0.036 0.8 0.8 0.8 0.13 |
ncl | 0.031 0.033 0.037 0.8 0.8 0.8 0.13 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.13 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 0.2 -1.8 12.5 | 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 | --- -6.9 5.2 -18.1 1.1 -1.5 |
esa | --- 10.0 0.6 13.1 -0.7 3.9 |
gfz | --- -7.8 -2.9 0.4 -1.7 -6.2 |
mit | --- -3.3 -1.2 -10.0 0.5 -8.3 |
ngs | --- -2.4 0.9 0.9 5.3 1.0 |
sio | --- -9.0 0.6 15.0 -1.9 9.1 |
jpl | --- -5.5 -0.4 -0.7 0.6 6.1 |
mig | --- 24.3 -0.4 14.1 -1.5 11.1 |
ncl | --- --- --- --- --- --- |
BuA | --- -0.3 0.7 3.0 -1.1 1.1 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 12.9 1.1 5.8 1.1 5.5 |
esa | --- 3.7 1.4 7.4 1.2 7.7 |
gfz | --- 5.2 1.8 8.0 0.8 6.3 |
mit | --- 2.2 1.0 4.1 0.9 6.3 |
ngs | --- 7.7 4.0 8.9 2.4 9.8 |
sio | --- 1.8 1.9 4.6 1.2 3.4 |
jpl | --- 8.1 1.8 4.8 1.5 8.9 |
mig | --- 3.1 2.0 4.4 1.2 3.5 |
ncl | --- --- --- --- --- --- |
BuA | --- 22.1 5.7 5.5 4.7 8.6 |
---------------|------------------------------------------------------------|
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)|
-----------------------------------------|------------|-----------------------|
| | |
emr16967.snx Combination: Iter. 1 |ALRT A 1| 0.5 4.7 5.1|
emr16967.snx Combination: Iter. 1 |HOB2 A 2| 4.7 1.5 -3.7|
emr16967.snx Combination: Iter. 1 |TIDB A 3| 3.8 1.6 3.8|
esa16967.snx Combination: Iter. 1 |HOB2 A 2| -4.3 0.2 -0.8|
esa16967.snx Combination: Iter. 1 |NOVM A 2| 0.8 0.1 20.5|
esa16967.snx Combination: Iter. 1 |ULAB A 3| 7.0 1.7 3.6|
gfz16967.snx Combination: Iter. 1 |ULAB A 3| 7.2 -0.4 -3.3|
gfz16967.snx Combination: Iter. 1 |NOVM A 2| -0.6 0.4 -13.4|
mit16967.snx Combination: Iter. 1 |POTS A 3| -6.8 4.0 1.8|
ngs16967.snx Combination: Iter. 1 |USNO A 1| -1.8 2.2 20.4|
sio16967.snx Combination: Iter. 1 |NOVM A 2| -0.8 -0.0 -20.9|
sio16967.snx Combination: Iter. 1 |POTS A 3| -5.4 1.9 -2.0|
cod16967.snx Combination: Iter. 2 |POTS A 3| -6.5 2.1 4.1|
jpl16967.snx Combination: Iter. 2 |PETS A 3| -0.4 -3.1 10.5|
| | |
mit1696g.snx Comp. to igs12P1696.snx |ULAB A 3| 0.3 5.1 0.7|
mit1696g.snx Comp. to igs12P1696.snx |NOVM A 2| -0.9 8.7 -3.2|
mit1696g.snx Comp. to igs12P1696.snx |POTS A 3| 2.7 -3.8 -0.6|
ncl1696g.snx Comp. to igs12P1696.snx |GUAT A 2| -1.9 -3.2 76.7|
ncl1696g.snx Comp. to igs12P1696.snx |NOVM A 2| -2.2 42.9 11.8|
| | |
igs12P1696.snx Stacking: Iter. 1 |CONZ A 8| -3.3 8.1 -7.6|
igs12P1696.snx Stacking: Iter. 1 |CTWN A 2| -1.1 1.2 33.3|
igs12P1696.snx Stacking: Iter. 1 |CUSV A 1| 9.6 8.3 5.5|
igs12P1696.snx Stacking: Iter. 1 |DUM1 A 2| -8.3 -9.2 -16.2|
igs12P1696.snx Stacking: Iter. 1 |HNPT A 3| -1.5 -6.3 7.2|
igs12P1696.snx Stacking: Iter. 1 |KOSG A 2| 6.1 7.3 8.9|
igs12P1696.snx Stacking: Iter. 1 |MAG0 A 8| 0.9 6.3 0.3|
igs12P1696.snx Stacking: Iter. 1 |METS A 2| -8.9 1.3 3.3|
igs12P1696.snx Stacking: Iter. 1 |MIZU A 9| 0.9 -17.3 3.1|
igs12P1696.snx Stacking: Iter. 1 |NETT A 3| 5.0 -22.0 -12.4|
igs12P1696.snx Stacking: Iter. 1 |NTUS A 10| 2.8 16.8 5.5|
igs12P1696.snx Stacking: Iter. 1 |PBR2 A 1| -21.4 3.8 0.9|
igs12P1696.snx Stacking: Iter. 1 |PBRI A 1| -24.1 3.4 9.3|
igs12P1696.snx Stacking: Iter. 1 |SMST A 2| -5.9 1.2 100.8|
igs12P1696.snx Stacking: Iter. 1 |TSEA A 2| -10.6 0.7 -2.8|
igs12P1696.snx Stacking: Iter. 1 |XMIS A 1| 6.1 -7.5 -3.4|
| | |
-----------------------------------------|------------|-----------------------|
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 | HOLB A | LEICA GRX1200PRO | TRIMBLE NETR9 | igs |
jpl | MANA A | TRIMBLE 4000SSI | TRIMBLE NETR9 | igs |
jpl | MAUI A | ASHTECH Z-XII3 | TRIMBLE NETRS | igs |
esa | MBAR A | ASHTECH UZ-12 | JAVAD TRE_G3TH DELTA | igs |
mit | MBAR A | ASHTECH UZ-12 | JAVAD TRE_G3TH DELTA | igs |
sio | MBAR A | ASHTECH UZ-12 | JAVAD TRE_G3TH DELTA | 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 |
cod | TABV A | JAVAD TRE_G3TH DELTA | JPS EGGDT | jpl |
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 | ARTU A | ASH700936D_M NONE | ASH700936D_M DOME | igs |
jpl | CAS1 A | AOAD/M_T NONE | AOAD/M_T AUST | igs |
jpl | CEDU A | AOAD/M_T NONE | AOAD/M_T AUST | igs |
mit | FAIR A | ASH701945G_M JPLA | ASH701945G_M NONE | igs |
sio | FAIR A | ASH701945G_M JPLA | ASH701945G_M NONE | igs |
jpl | GUAM A | ASH701945B_M NONE | ASH701945B_M JPLA | igs |
esa | HOLM A | ASH701945C_M NONE | ASH701945D_M NONE | igs |
jpl | KIR0 A | AOAD/M_T NONE | AOAD/M_T OSOD | igs |
mit | KOSG A | AOAD/M_B DUTD | AOAD/M_B NONE | igs |
sio | KOSG A | AOAD/M_B DUTD | AOAD/M_B NONE | igs |
jpl | MAC1 A | AOAD/M_T NONE | AOAD/M_T AUST | igs |
jpl | MAW1 A | AOAD/M_T NONE | AOAD/M_T AUST | 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 | NVSK A | TRM33429.00+GP NONE | TRM33429.00+GP DOME | igs |
jpl | ONSA A | AOAD/M_B NONE | AOAD/M_B OSOD | igs |
jpl | PETS A | ASH701933B_M NONE | ASH701933B_M SCIS | igs |
jpl | SHAO A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
jpl | SUWN A | TRM29659.00 NONE | TRM29659.00 DOME | igs |
jpl | SYOG A | AOAD/M_T NONE | AOAD/M_T DOME | igs |
cod | TABV A | TPSCR.G3 SCIS | ASH700936A_M SNOW | jpl |
jpl | TIDB A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
jpl | WSRT A | AOAD/M_T NONE | AOAD/M_T DUTD | igs |
jpl | YAKT A | ASH701933B_M NONE | ASH701933B_M SCIS | igs |
mit | YAR2 A | AOAD/M_T JPLA | AOAD/M_T NONE | igs |
sio | YAR2 A | AOAD/M_T JPLA | AOAD/M_T NONE | igs |
jpl | YSSK A | ASH701933B_M NONE | ASH701933B_M DOME | igs |
emr | ZECK A | JAVRINGANT_DM DOME | JAVRINGANT_DM JVDM | 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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