This paper focuses on the optimization of the image quality for the ENVISAT ASAR ScanSAR modes. The best trade-off between Noise Equivalent σ0 (NEσ0) and Equivalent Number of Looks (ENL) is achieved by optimizing the 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 (focusing by SAR matched reference and scalloping compensation by inverse antenna weighting) introduce a space-variant distortion in the focused impulse response (FIRF). The focusing technique here proposed exploits a set of space-variant focusing kernels computed by means of Wiener deconvolution. In this way focusing and descalloping are obtained at one time, achieving a finer resolution and lower distortion of impulse response.

Optimizing performances of the ENVISAT ASAR ScanSAR modes / A. M., Guarnieri; Y. L., Desnos; Guccione, Pietro. - (2000). (Intervento presentato al convegno Progress in Electromagnetic Researh Symposium, PIERS 2000 tenutosi a Cambridge, MA nel July 5-14, 2000).

Optimizing performances of the ENVISAT ASAR ScanSAR modes

GUCCIONE, Pietro
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 σ0 (NEσ0) and Equivalent Number of Looks (ENL) is achieved by optimizing the 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 (focusing by SAR matched reference and scalloping compensation by inverse antenna weighting) introduce a space-variant distortion in the focused impulse response (FIRF). The focusing technique here proposed exploits a set of space-variant focusing kernels computed by means of Wiener deconvolution. In this way focusing and descalloping are obtained at one time, achieving a finer resolution and lower distortion of impulse response.
2000
Progress in Electromagnetic Researh Symposium, PIERS 2000
Optimizing performances of the ENVISAT ASAR ScanSAR modes / A. M., Guarnieri; Y. L., Desnos; Guccione, Pietro. - (2000). (Intervento presentato al convegno Progress in Electromagnetic Researh Symposium, PIERS 2000 tenutosi a Cambridge, MA nel July 5-14, 2000).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/13697
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