The response of Synthetic Aperture Radar to ocean surface waves

Hasselmann, Klaus; Alpers, Werner

doi:10.1007/978-1-4684-8980-4_27

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The response of Synthetic Aperture Radar to ocean surface waves

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Hasselmann, Klaus
MPI for Meteorology, Max Planck Society;

Alpers, Werner
Institut für Meereskunde, Universität Hamburg;
MPI for Meteorology, Max Planck Society;

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Citation

Hasselmann, K., & Alpers, W. (1986). The response of Synthetic Aperture Radar to ocean surface waves. In O. M. Phillips, & K. Hasselmann (Eds.), Wave dynamics and radio probing of the ocean surface: Proc. IUCRM Symposium (pp. 393-402). Plenum Publ. Corp. doi:10.1007/978-1-4684-8980-4_27.

Cite as: https://hdl.handle.net/21.11116/0000-0008-8730-9

Abstract

Basic concepts of SAR imaging theory of ocean surface waves are reviewed. The effects of orbital velocity and acceleration on the imaging mechanism are discussed in simple physical terms. The spatially varying orbital velocity contributes to the imaging through ``velocity bunching,'' while the effect is relatively small and still in the linear range, but produces nonlinear image distortions and smearing for larger orbital velocities. The spatially varying orbital acceleration results in a nonuniform azimuthal image smear. Image contrast enhancement by azimuthal focus adjustment of the SAR processor is attributed to this spatial variability of the orbital acceleration effects.