On some spectral properties of TanDEM-X interferograms over forested areas

Journal article (2013)

Authors

Francesco de Zan Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Gerhard Krieger Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Paco López-Dekker Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
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Published Date

2013

Language

English

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Abstract

This letter reports about some observations over rainforests (in Brazil and Indonesia), where the spectra of TanDEM-X interferograms show distinct features, almost a signature, which is explained and modeled in terms of the scattering properties. Supported by comparisons with simulations, the observations exclude any homogeneous horizontally layered forest; instead, they are compatible with a model with point scatterers clustered in clouds. Such a model, with high extinction and large gaps that allow significant penetration, is able to explain to a good degree the observations.