Post on 21-Mar-2016
description
SPECTRE (www.noveltis.fr/spectre): A Web Service for Ionospheric
ProductsF. CRESPON, E. JEANSOU, J. HELBERT, G. MOREAUX (NOVELTIS)
P. LOGNONNE (IPGP)R. GARCIA (OMP)
Contact: francois.crespon@noveltis.fr
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 2© Noveltis 2008
This document is the property of Noveltis, no part of it shall be reproduced or transmitted without the express prior written authorisation of Noveltis
Summary
SPECTRE service
Applications
Conclusions
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 3© Noveltis 2008
This document is the property of Noveltis, no part of it shall be reproduced or transmitted without the express prior written authorisation of Noveltis
Description of SPECTRE service
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 4© Noveltis 2008
This document is the property of Noveltis, no part of it shall be reproduced or transmitted without the express prior written authorisation of Noveltis
SPECTRE service
SPECTRE Service: design
GPSObservations(300 stations)
TEC computationat every piercing point
TEC interpolationon grid points
+TGDs, IFBs
Kalman filtering
Productdatabase
End UsersWebsite FTP
A tens of data servers: IGS servers (world)
EUREF servers (Europe)
IGN server (France)
ASI server (Italia)
ICC server (Spain)
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 5© Noveltis 2008
This document is the property of Noveltis, no part of it shall be reproduced or transmitted without the express prior written authorisation of Noveltis
SPECTRE service
GPS
Network of bi-frequency receivers
Ionosphere
Piercingpoints
~350 km
Computation: IPP positions
Obliquity factor
Ionospheric combination
SPECTRE Service: design
GPSObservations(300 stations)
TEC computationat every piercing point
TEC interpolationon grid points
+TGDs, IFBs
Kalman filtering
Productdatabase
End UsersWebsite FTP
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 6© Noveltis 2008
This document is the property of Noveltis, no part of it shall be reproduced or transmitted without the express prior written authorisation of Noveltis
SPECTRE service
Computation: TEC maps (2.5°x2.5°x30s, 15 min., 1h)
Relative error maps
Electronic biases (IFB,TGD)
Relative errors for IFB and TGD
SPECTRE Service: design
GPSObservations(300 stations)
TEC computationat every piercing point
TEC interpolationon grid points
+TGDs, IFBs
Kalman filtering
Productdatabase
End UsersWebsite FTP
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 7© Noveltis 2008
This document is the property of Noveltis, no part of it shall be reproduced or transmitted without the express prior written authorisation of Noveltis
SPECTRE service
Raw STEC products: IPP positions,
Obliquity factor,
Ionospheric combination,
IFB, TGD.
VTEC maps: TEC maps at 30s,
TEC maps at 15 min,
TEC maps at 1h.
Website: http://www.noveltis.net/spectre
SPECTRE Service: products and users
GPSObservations(300 stations)
TEC computationat every piercing point
TEC interpolationon grid points
+TGDs, IFBs
Kalman filtering
Productdatabase
End UsersWebsite FTP
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 8© Noveltis 2008
This document is the property of Noveltis, no part of it shall be reproduced or transmitted without the express prior written authorisation of Noveltis
SPECTRE service
SPECTRE Service: products and users
GPSObservations(300 stations)
TEC computationat every piercing point
TEC interpolationon grid points
+TGDs, IFBs
Kalman filtering
Productdatabase
End UsersWebsite FTP
Raw STEC products: IPP positions
Obliquity factor
Ionospheric combination
IFB, TGD
VTEC maps: TEC maps at 30s
TEC maps at 15 min.
TEC maps at 1h
Website: http://www.noveltis.net/spectre
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 9© Noveltis 2008
This document is the property of Noveltis, no part of it shall be reproduced or transmitted without the express prior written authorisation of Noveltis
SPECTRE service
Comparison with satellite altimeters (7 month data) Jason: bias ~ 0.66 TECu
TOPEX: bias ~ -0.36 TECu
ENVISAT: bias ~ 5.95 TECu
Coherent with JPL / CODE / UPC / IGS global TEC maps
SPECTRE Service: products validation
GPSObservations(300 stations)
TEC computationat every piercing point
TEC interpolationon grid points
+TGDs, IFBs
Kalman filtering
Productdatabase
End UsersWebsite FTP
Comparison with ionosondes (7 month data)
ROME ATHENS TORTOSA CHILTON JULIUSRUH PRUHONICE TROMSO
JPL -1.45 -0.66 -1.92 -1.25 -0.91 -0.79 -1.08
CODE -3.36 -2.55 -4.01 -3.60 -3.42 -2.92 -3.58
UPC -4.10 -3.54 -4.36 -2.66 -1.93 -2.28 -2.24
IGS -3.21 -2.45 -3.67 -2.72 -2.28 -2.25 -2.41
SPECTRE 0.53 1.15 -0.02 -0.15 0.32 0.40 -1.06
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SPECTRE service
SPECTRE Service: support and maintenance
GPSObservations(300 stations)
TEC computationat every piercing point
TEC interpolationon grid points
+TGDs, IFBs
Kalman filtering
Productdatabase
End UsersWebsite FTP
Support (required by users) Improvements of TEC maps display
Process of period before the service start (October 2003)
Extraction of Raw Products for few stations
Development of dedicated package for IPGP (read of new GPS data format)
Improvement of SPECTRE service for SWENET portal (timestamp for SWENET importer)
Communications about service status
Maintenance Reprocess of the database
Update of SPECTRE website
Update of code source
Providing products to SWENET portal
Latest publication on service performances (October 2007)
Latest version : 4.3 (June 2008)
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Applications of SPECTRE products
NOV-3666-SL-6636 ESWW5, Brussels, Belgium November 17th-21th, 2008 12© Noveltis 2008
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Applications
Ionospheric seismology: Remote sensing of ionospheric waves induced by earthquakes
Estimation of rupture parameters: velocity, direction, azimut of fault
Estimation of margins features: velocity of rayleigh waves
Remote sensing of ionospheric waves induced by tsunami
Early warning system concept
tsunami
ionosphere
Courtesy of IPGP
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Applications
Geomagnetic storms : Remote sensing of ionospheric perturbations
Additional data for regional geomagnetic storm warning
Courtesy of WDC, Kyoto
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Applications
Perspectives of markets for space weather services: Space agencies Preliminary considerations for missions.
Space industry Instruments design / specifications.
Space Ground segment Data correction (post-processing).
Electric companies / energy transport Geomagnetic induced current.
Meteorological agencies Improvement of forecast models (gravity waves).
Defence HF communications, radars operation.
Research institutes Seismology, Climatology, Data assimilation for space weather models.
Geographical survey Confirmation of tsunami alert, rescue deployment. Insurance Expertise in case of injured persons, damaged equipments, etc.
Tourism Auroras prediction, space tourism.
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Conclusion
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Conclusions
SWENET pilot project: SPECTRE service Set up operational service: production of TEC maps since April 2004 !
« User oriented » space weather application: http://www.noveltis.net/spectre
20 registered users from France, India, Indonesia, Morocco, Russia, Spain, Switzerland, USA, UK, Ukraine.
Service maintenance and support is now achieved with our own funding.
Service validation SPECTRE TEC maps were compared to GIMs (JPL,UPC,CODE,IGS), ionosondes and satellite altimeter measurements,
Good performances in estimating absolute TEC and ionosphere dynamics.
Service applications Scientific use of SPECTRE products,
Need to improve service to catch commercial users: Nowcast (real time GPS), forecast (data assimilation in dedicated model),