![OTHR-SW ,[object Object],[object Object],[object Object],[object Object],The coordinate registration (CR) procedure allows to associate digital data to coordinates that determine univocally its position on the Earth surface. Without a correct CR procedure OTHR-SW data are useless. The radar echo needs to be geo-referenciate! 1/8](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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- 1. Coordinate Registration of OTHR-SW Remotely-Sensed Data by Sea-Land Transitions Identification Università di Firenze Dipartimento di Elettronica e Telecomunicazioni F. Sermi, F. Cuccoli, L. Facheris, D. Giuli IEEE Gold 2010 29, 30 April 2010 – Naval Academy, Livorno, Italy Consorzio Nazionale Interuniversitario per le Telecomunicazioni (centro RaSS)
- 3. Remote sensing with HF radars 1/8 The huge surveillance area of OTHR-SW systems and the interaction between EM waves in the HF band and sea swells can be employed to gather environmental data on a very large scale. Since the ‘70s several methods have been proposed to extract sea-state information from the OTHR-SW echo. Like other measurements, environmental data are useless without an appropriate CR.
- 7. OTHR-SW Scenario & Parameters 5/8
- 9. Radar Footprint Reconstruction 7/8 Reconstructed radar footprints: A : the Ionosphere is modeled as a perfect reflecting mirror at a given height; B : a locally-homogeneous electron density profile is associated to the Ionosphere . Simulated echoes: The black curve is associated to A , while the red one is associated to B .
- 10. Results and Conclusions A simplified OTHR scenario confirms that the sea/land transitions can be profitably used for the real time CR of the OTHR-SW signals . The method is jet to be tested in a scenario that accounts for the dependence of the ionospheric reflection height from the incidence angle of the ray. The developed method is optimal for the application in a complex coastline profiles scenario . 8/8 After the analisys of the surveillance area by the OTHR-SW system, other geomorphological features (beside the coastal profiles) could be employed in the CR method.
- 11. Coordinate Registration of OTHR-SW Remotely-Sensed Data by Sea-Land Transitions Identification Università di Firenze Dipartimento di Elettronica e Telecomunicazioni F. Sermi, F. Cuccoli, L. Facheris, D. Giuli IEEE Gold 2010 29, 30 April 2010 – Naval Academy, Livorno, Italy Consorzio Nazionale Interuniversitario per le Telecomunicazioni (centro RaSS)