This paper focuses on the optimization of the image quality for the ENVISAT ASAR ScanSAR modes. The best trade-off between Noise Equivalent σ (NEσ) and Equivalent Number of Looks (ENL) is achieved by optimizing both system and processing parameters within the instrument constraints. An end-to-end model to validate the study has been used. Thereafter a novel phase preserving focusing technique is presented. Conventional approaches (that exploit the SAR matched filter) introduce a space-variant distortion when focusing very law resolution ScanSAR data. The focusing technique here proposed uses a set of space-variant focusing kernels properly computed by means of Wiener pseudo-inversion. In this way focusing is achieved with no distortion, thus getting the finer resolution and the lower sidelobes.

ASAR ScanSAR Modes: Quality Enhancement / Cafforio, C.; Guccione, P.; Monti Guarnieri, A.; Desnos, Y. -L.. - In: ESA SP. - ISSN 0379-6566. - STAMPA. - 461:(2000), pp. 2002-2007. (Intervento presentato al convegno ERS-Envisat Symposium, 2000 tenutosi a Gothenburg, Sweden nel October 16-20, 2000).

ASAR ScanSAR Modes: Quality Enhancement

Cafforio, C.;Guccione, P.;
2000-01-01

Abstract

This paper focuses on the optimization of the image quality for the ENVISAT ASAR ScanSAR modes. The best trade-off between Noise Equivalent σ (NEσ) and Equivalent Number of Looks (ENL) is achieved by optimizing both system and processing parameters within the instrument constraints. An end-to-end model to validate the study has been used. Thereafter a novel phase preserving focusing technique is presented. Conventional approaches (that exploit the SAR matched filter) introduce a space-variant distortion when focusing very law resolution ScanSAR data. The focusing technique here proposed uses a set of space-variant focusing kernels properly computed by means of Wiener pseudo-inversion. In this way focusing is achieved with no distortion, thus getting the finer resolution and the lower sidelobes.
2000
ERS-Envisat Symposium, 2000
ASAR ScanSAR Modes: Quality Enhancement / Cafforio, C.; Guccione, P.; Monti Guarnieri, A.; Desnos, Y. -L.. - In: ESA SP. - ISSN 0379-6566. - STAMPA. - 461:(2000), pp. 2002-2007. (Intervento presentato al convegno ERS-Envisat Symposium, 2000 tenutosi a Gothenburg, Sweden nel October 16-20, 2000).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/13716
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