Synergy of Cassini SAR and altimeter acquisitions for the retrieval of dune field characteristics on Titan

Valerio Poggiali; Marco Mastrogiuseppe; Mattia Callegari; Riccardo Martufi; Roberto Seu; Domenico Casarano; Luca Pasolli; Claudia Notarnicola

doi:10.1117/12.978185

21 November 2012 Synergy of Cassini SAR and altimeter acquisitions for the retrieval of dune field characteristics on Titan

Valerio Poggiali, Marco Mastrogiuseppe, Mattia Callegari, Riccardo Martufi, Roberto Seu, Domenico Casarano, Luca Pasolli, Claudia Notarnicola

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Proceedings Volume 8536, SAR Image Analysis, Modeling, and Techniques XII; 853608 (2012) https://doi.org/10.1117/12.978185
Event: SPIE Remote Sensing, 2012, Edinburgh, United Kingdom

Abstract

This work focuses on the retrieval of Titan’s dune field characteristics addressing different radar modes. The main purpose of the proposed work is to exploit a possible synergy between SAR and altimeter acquisitions modes to provide information about dune field. Cassini has performed 86 Titan flybys in which several observations of dune fields have been collected in altimetry mode. There are several cases in which SAR and altimeter have been acquired over same areas covered by dune fields, such as during T28 (SAR) and T30 (altimeter) flybys. Altimetry together with SAR data have been used to derive the rms slopes of dunes (large scale) over Fensal area, this information has been employed to calculate SAR incidence angle with respect to dunes. We extracted backscattering coefficients of bright and dark areas detected in the analyzed SAR image in order to evaluate the angular response of scattering. Through the Geometric Optics model we retrieve roughness values (small scale rms slope) for both dune bright and dark areas.

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Valerio Poggiali, Marco Mastrogiuseppe, Mattia Callegari, Riccardo Martufi, Roberto Seu, Domenico Casarano, Luca Pasolli, and Claudia Notarnicola "Synergy of Cassini SAR and altimeter acquisitions for the retrieval of dune field characteristics on Titan", Proc. SPIE 8536, SAR Image Analysis, Modeling, and Techniques XII, 853608 (21 November 2012); https://doi.org/10.1117/12.978185

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