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Title:
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Impact of scene decorrelation on geosynchronous SAR data focusing
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Author:
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Recchia, Andrea; Monti Guarnieri, Andrea; Broquetas Ibars, Antoni; Leanza, Antonio
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció |
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Abstract:
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We discuss the effects of the clutter on geosynchronous SAR systems exploiting long integration times (from minutes to hours) to counteract for two-way propagation losses and increase azimuth resolution. Only stable targets will be correctly focused whereas unstable targets will spread their energy along azimuth direction. We derive here a generic model for the spreading of the clutter energy based on the power spectral density of the clutter itself. We then assume the Billingsley Intrinsic Clutter Motion model, representing the clutter power spectrum as an exponential decay, and derive the expected GEOSAR signal-to-clutter ratio. We also provide some results from a Ground Based RADAR experiment aimed at assessing the long-term clutter statistics for different scenarios to complement the Internal Clutter Motion model, mainly derived for windblown trees. Finally, we discuss the expected performances of two GEOSAR systems with different acquisition geometries. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
-Àrees temàtiques de la UPC::Enginyeria agroalimentària::Ciències de la terra i de la vida
-Remote sensing
-Earth sciences
-Focusing
-Geosynchronous synthetic aperture radar (GEOSAR)
-Scene decorrelation
-Wind-blown clutter
-Synthetic-aperture radar
-Clutter
-Stacks
-Teledetecció
-Ciències de la terra |
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Rights:
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Document type:
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Article - Published version
Article |
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Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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