[IGSREPORT-21082] Wk 1699 IGS SINEX Combination
igs-rf at ign.fr
igs-rf at ign.fr
Fri Aug 17 04:45:20 PDT 2012
Authors: A. Duret, B. Garayt, P. Rebischung
================================================================================
Combination of AC solutions for GPS week 1699 - 12/07/29 to 12/08/04
================================================================================
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
igs12P1699.snx Combined weekly solution
igs12P1699.erp Daily Earth Rotation Parameters
igs12P1699.sum This file
igs12P1699.itr Residuals between AC solutions and IGS08 for the RF stations
igs12P1699.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 = mit16997.snx
mig = mit1699g.snx
ITR = IGS08.snx
igs = igs12P1699.snx (weekly combined solution)
IGS = IGS12P31.snx (cumulative solution)
The following solutions are not used in the combination but only for
comparison:
mig ncl
Solutions with manual station deletion:
esa CGGN GUAT TXES HOLM ALRT
gfz CRAR
grg NOVM
mit SMST
ngs AIRA
sio CANT MAS1 ROAP CRAR AIRA
jpl KIRI LAUT 0194 SMST KOUC AIRA
mig 0194 AIRA 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 | 259 | 92 | 49 | 0.011 |
emr | 84 | 50 | 45 | 1.969 |
esa | 170 | 64 | 42 | 1.525 |
gfz | 193 | 94 | 49 | 6.407 |
grg | 120 | 67 | 45 | 2.686 |
mit | 250 | 111 | 52 | 0.886 |
ngs | 252 | 97 | 50 | 12.998 |
sio | 291 | 117 | 49 | 0.756 |
jpl | 147 | 74 | 44 | 2.382 |
mig | 484 | 127 | 53 | ------ |
ncl | 194 | 106 | 52 | ------ |
igs | 446 | 127 | 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 | 1.3 0.2 0.1 | 3.7 3.5 8.0 |
emr 50 | 1.4 -0.0 -0.0 | 2.7 3.2 8.2 |
esa 64 | 1.8 -0.1 -0.2 | 3.2 4.0 8.2 |
gfz 94 | 1.7 0.3 -0.3 | 4.3 4.1 8.9 |
grg 67 | 1.7 0.0 -0.6 | 3.1 3.8 8.6 |
mit 111 | 1.2 0.4 -0.2 | 3.8 4.0 8.2 |
ngs 97 | 0.9 0.4 -0.1 | 3.8 3.6 8.3 |
sio 117 | 1.0 0.4 -0.2 | 4.0 3.6 7.7 |
jpl 74 | 1.8 0.1 0.1 | 3.8 3.8 9.2 |
mig 127 | 1.1 0.3 -0.2 | 3.8 3.8 7.4 |
ncl 106 | 1.4 0.3 -0.4 | 3.6 3.7 8.4 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 253 | -0.2 -0.1 0.0 | 1.0 0.8 3.0 |
emr 83 | 0.1 0.0 -0.1 | 1.1 0.7 3.0 |
esa 162 | 0.3 -0.1 0.0 | 1.1 0.8 3.1 |
gfz 190 | 0.2 -0.0 -0.0 | 0.9 0.8 2.3 |
grg 115 | 0.9 -0.1 -0.2 | 1.3 1.4 4.0 |
mit 249 | 0.0 0.0 0.0 | 0.8 0.8 2.0 |
ngs 246 | 0.0 0.1 0.0 | 1.8 1.7 2.6 |
sio 273 | -0.5 -0.0 0.1 | 1.1 0.8 2.3 |
jpl 135 | 0.2 0.1 -0.0 | 1.3 1.0 3.8 |
mig 440 | -0.4 0.0 -0.0 | 0.2 0.3 1.1 |
ncl 194 | 0.1 0.0 0.0 | 0.7 0.7 2.2 |
ITR 127 | -1.4 -0.2 0.1 | 3.8 3.9 7.7 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 238 | 0.9 0.1 -0.0 | 2.2 3.4 5.6 |
emr 82 | 1.0 0.1 -0.2 | 2.4 3.1 5.2 |
esa 158 | 1.5 -0.1 -0.1 | 2.4 3.8 6.5 |
gfz 189 | 1.3 0.1 -0.2 | 2.8 3.8 5.6 |
grg 114 | 1.8 0.0 -0.4 | 2.4 3.5 7.0 |
mit 244 | 1.2 0.2 -0.1 | 2.6 4.0 5.5 |
ngs 224 | 1.1 0.2 -0.1 | 2.9 3.9 5.6 |
sio 262 | 0.5 0.2 -0.1 | 2.4 3.4 4.7 |
jpl 124 | 1.4 0.1 0.1 | 2.4 2.3 6.5 |
mig 394 | 0.7 0.0 -0.1 | 2.3 3.3 4.7 |
ncl 191 | 1.1 0.1 -0.3 | 2.5 3.7 5.5 |
igs 398 | 1.1 -0.0 -0.1 | 2.3 3.4 4.9 |
ITR 166 | -0.1 -0.1 0.0 | 2.6 3.1 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 | -0.033 -0.010 0.014 0.7 1.3 0.7 -0.32 |
emr | -0.001 -0.003 0.004 0.2 -0.8 1.3 0.02 |
esa | -0.030 0.027 0.122 0.0 -2.9 17.8 -0.19 |
gfz | -0.033 -0.000 -0.011 -1.0 0.9 0.5 -0.35 |
grg | -0.049 0.044 0.009 2.2 -10.3 19.1 -0.17 |
mit | -0.003 0.012 -0.030 2.2 -2.1 15.5 -0.32 |
ngs | -0.047 0.011 0.005 0.8 2.4 13.8 -0.28 |
sio | -0.014 -0.008 0.048 -3.8 -0.0 -7.7 -0.38 |
jpl | -0.027 0.034 0.027 -1.6 3.1 1.0 -0.02 |
mig | -0.030 0.028 -0.067 -0.6 1.2 -0.5 -0.21 |
ncl | -0.020 0.011 0.018 -1.0 0.2 0.5 -0.06 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.23 |
---------------|---------------------------------------------------------------|
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 | 0.032 0.033 0.039 0.9 0.9 0.9 0.13 |
esa | 0.034 0.038 0.039 0.9 0.9 0.9 0.14 |
gfz | 0.035 0.037 0.040 0.9 0.9 0.9 0.15 |
grg | 0.035 0.036 0.043 0.9 0.9 0.9 0.15 |
mit | 0.032 0.034 0.038 0.9 0.9 0.9 0.14 |
ngs | 0.031 0.032 0.037 0.8 0.8 0.8 0.13 |
sio | 0.033 0.034 0.037 0.9 0.9 0.9 0.14 |
jpl | 0.039 0.042 0.046 1.1 1.0 1.0 0.16 |
mig | 0.031 0.032 0.036 0.8 0.8 0.8 0.13 |
ncl | 0.031 0.032 0.036 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 | 0.1 -0.9 10.0 | 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 | --- 7.8 -0.6 20.4 -2.1 -2.6 |
esa | --- 10.4 -0.9 3.3 -0.4 -2.8 |
gfz | --- 0.6 -0.4 3.8 -0.4 -6.5 |
grg | --- --- 3.3 -8.7 0.5 -9.4 |
mit | --- -8.6 -0.1 -7.8 -0.4 6.5 |
ngs | --- -5.3 -0.4 7.3 4.2 14.3 |
sio | --- -7.8 1.1 10.5 0.3 15.9 |
jpl | --- 6.2 -2.4 2.0 -0.9 -3.8 |
mig | --- 29.4 1.2 7.7 0.4 14.5 |
ncl | --- --- --- --- --- --- |
BuA | --- -7.0 -3.1 -1.5 -0.8 -7.2 |
---------------|------------------------------------------------------------|
5-5-2) STD:
==============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- --- --- --- --- |
emr | --- 13.0 2.1 7.4 1.9 8.4 |
esa | --- 2.5 0.8 6.5 0.8 7.0 |
gfz | --- 3.4 2.4 10.1 1.9 15.2 |
grg | --- --- 1.4 6.8 1.5 4.9 |
mit | --- 4.9 1.5 7.4 1.0 4.6 |
ngs | --- 6.2 2.5 10.8 3.7 18.2 |
sio | --- 4.1 0.8 3.5 1.0 3.7 |
jpl | --- 7.7 2.0 11.1 1.2 5.5 |
mig | --- 4.1 0.8 3.3 1.1 3.3 |
ncl | --- --- --- --- --- --- |
BuA | --- 19.1 4.3 12.1 4.1 8.0 |
---------------|------------------------------------------------------------|
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)|
-----------------------------------------|------------|-----------------------|
| | |
emr16997.snx Combination: Iter. 1 |ALRT A 1| 0.6 3.6 4.3|
esa16997.snx Combination: Iter. 1 |ULAB A 3| 5.6 1.7 4.5|
gfz16997.snx Combination: Iter. 1 |NOVM A 2| -1.1 -0.4 -15.3|
grg16997.snx Combination: Iter. 1 |POTS A 3| 4.9 4.2 2.7|
grg16997.snx Combination: Iter. 1 |HNPT A 3| -5.8 0.2 -0.9|
grg16997.snx Combination: Iter. 1 |BARH A 2| -5.2 -1.1 2.8|
grg16997.snx Combination: Iter. 1 |ALIC A 2| 1.0 0.8 -13.3|
sio16997.snx Combination: Iter. 1 |POTS A 3| -6.2 0.2 -2.2|
esa16997.snx Combination: Iter. 2 |CAS1 A 4| -0.9 1.0 -12.5|
grg16997.snx Combination: Iter. 2 |TOW2 A 2| 0.8 2.0 -12.5|
| | |
mit1699g.snx Comp. to igs12P1699.snx |SMST A 2| 0.4 -0.6 89.8|
| | |
igs12P1699.snx Stacking: Iter. 1 |ALRT A 1| 3.6 -5.7 4.9|
igs12P1699.snx Stacking: Iter. 1 |CONZ A 8| -3.7 9.5 -7.5|
igs12P1699.snx Stacking: Iter. 1 |CUSV A 1| 11.8 8.4 -3.9|
igs12P1699.snx Stacking: Iter. 1 |DUM1 A 2| -5.5 -11.1 -1.7|
igs12P1699.snx Stacking: Iter. 1 |HNPT A 3| 0.1 -7.0 4.9|
igs12P1699.snx Stacking: Iter. 1 |KOSG A 2| 7.9 7.6 7.3|
igs12P1699.snx Stacking: Iter. 1 |METS A 2| -8.4 1.5 2.8|
igs12P1699.snx Stacking: Iter. 1 |MIZU A 9| 4.0 -19.9 6.9|
igs12P1699.snx Stacking: Iter. 1 |NETT A 3| 9.9 -24.9 -10.7|
igs12P1699.snx Stacking: Iter. 1 |NTUS A 10| 4.2 16.6 5.1|
igs12P1699.snx Stacking: Iter. 1 |PBR2 A 1| -21.3 3.4 -6.8|
igs12P1699.snx Stacking: Iter. 1 |PBRI A 1| -22.8 3.3 -1.0|
igs12P1699.snx Stacking: Iter. 1 |TIXI A 2| 0.9 6.8 0.5|
igs12P1699.snx Stacking: Iter. 1 |TXES A 1| 0.8 -10.3 12.6|
igs12P1699.snx Stacking: Iter. 1 |XMIS A 1| 6.9 -10.7 3.1|
| | |
-----------------------------------------|------------|-----------------------|
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 | HARV A | AOA SNR-8000 ACT | JAVAD TRE_G3TH DELTA | igs |
jpl | HOLB A | LEICA GRX1200PRO | TRIMBLE NETR9 | igs |
esa | ILHA A | LEICA GRX1200GGPRO | LEICA GRX1200+GNSS | sirgas |
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 | PRDS A | AOA BENCHMARK ACT | TPS NET-G3A | igs |
mit | PRDS A | AOA BENCHMARK ACT | TPS NET-G3A | igs |
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 | AREQ A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
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 |
jpl | GUAM A | ASH701945B_M NONE | ASH701945B_M JPLA | igs |
jpl | HARV A | AOAD/M_T NONE | AOAD/M_T JPLA | 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 |
cod | SMST A | TRM41249.00 DOME | TRM41249.00 TZGD | igs |
jpl | SYOG A | AOAD/M_T NONE | AOAD/M_T DOME | igs |
jpl | TIDB A | AOAD/M_T NONE | AOAD/M_T JPLA | igs |
jpl | YAKT A | ASH701933B_M NONE | ASH701933B_M SCIS | igs |
jpl | YSSK A | ASH701933B_M NONE | ASH701933B_M DOME | 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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