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Polarimetric 3-D Reconstruction From Multicircular SAR at P-Band

2013; Institute of Electrical and Electronics Engineers; Volume: 11; Issue: 4 Linguagem: Inglês

10.1109/lgrs.2013.2279236

1558-0571

Octavio Ponce, Pau Prats, Rolf Scheiber, Andreas Reigber, Alberto Moreira, Esteban Aguilera,

Soil Moisture and Remote Sensing

Multicircular synthetic aperture radar (SAR) (MCSAR) is an extension of circular SAR (CSAR) characterized by the formation of a synthetic aperture in elevation with several circular flights. This imaging mode allows an improved resolution in the plane perpendicular to the line of sight ( LOS⊥), thus suppressing the 3-D cone-shaped sidelobes that are formed when focusing with CSAR. This letter presents the first polarimetric MCSAR airborne experiment acquired at P-band by the German Aerospace Center (DLR)'s F-SAR system over a forested area in Vordemwald, Switzerland. This letter also includes a phase calibration method based on the singular value decomposition (SVD) using ground signatures to estimate constant phase offsets within a stack of 2-D images. Focusing methods, such as fast-factorized back projection (FFBP), beamforming (BF), and compressive sensing (CS), described in previous publications are used to solve the complex reflectivity in the (x, y, z) space.