1,721,115 research outputs found
Simulating biomass tomographic stacks from real data on forests
No full textThis paper describes an innovative processing chain for simulating spaceborne tomographic stacks starting from real airborne stacks. This is particularly useful for testing the capabilities of forthcoming spaceborne systems when imaging complex distributed media such as tropical forests. The algorithm here proposed preserves the physical features of the scattering objects and returns tomographic stacks whose geometry of acquisition and radar parameters fit spaceborne systems. This procedure has been applied to generate simulated datasets of the forthcoming ESA 7th Earth Explorer satellite starting from airborne data gathered by the AfriSAR and TropiSAR airborne missions. Particular attention has been paid to the procedure for generating large swath starting from tiny airborne tiles. This simulator has been used to assess the impact of orbital irregularities on the quality of AGB estimates of the BIOMASS system
Adaptive processing for spaceborne monitoring of forests using SAR tomography
No full textThis paper proposes different processing techniques for the polarimetric 3-D imaging of forested areas using multibaseline interferometric SAR data, acquired in TanDEM configuration from spaceborne SAR sensors. TanDEM-like acquisition modes, based on the simultaneous measurement of interferometric pairs, represent a high-potential alternative for the tomographic imaging of scenes with rapidly decorrelating scattering features using a spaceborne SAR. Unlike coventional tomographic processing, this correlation tomography requires specific processing techniques to estimate the covariance matrix from single-pass InSAR pairs that are uncorrelated one from another. These techniques are proposed in this paper and their potential for boreal forest characterization are evaluated in the frame of the preparation of the SAOCOM CS mission using ESA’s BIOSAR II campaigna data sets acquired at L band by the DLR ESAR sensor
Experimental demonstration of L-Band Bistatic Correlation SAR Tomography of Forested Areas: results from the TomoSense campaign
No full textPotential for Snow Water Equivalent Retrieval by Across-Track Formations of SAR Satellites: A Sensitivity Analysis
No full textThis paper investigates the potential for accurate retrieval of Snow Water Equivalent (SWE) using an across-track formation of Synthetic Aperture Radar (SAR) satellites
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