Radiometric calibration by natural targets: methods and performance evaluation

Konferenz: EUSAR 2012 - 9th European Conference on Synthetic Aperture Radar
23.04.2012 - 26.04.2012 in Nuremberg, Germany

Tagungsband: EUSAR 2012

Seiten: 4Sprache: EnglischTyp: PDF

Persönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt

Guccione, Pietro (Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari)
Monti Guarnieri, Andrea; Recchia, Andrea; Tebaldini, Stefano (Dipartimento di Elettronica e Informazione; Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy)

PS-cal traditionally exploits the amplitude of stable targets to calibrate data stacks. Here we show that such approach suffers of a non-stationary biasing due to fluctuations in SCR that may lead to a significant performance loss. We discuss a coherent based, bias-free estimator. The method exploits much more PS than the non-coherent case, thus it can be applied to small image blocks, to detect local artifacts, and it is robust when few images are given. Comparative analysis of the two approaches and results based on COSMO SKYMED data are shown.