The Application of Near-Nadir Δk Radar Techniques to Geodetic Altimetry And Oceanographic Remote Sensing

This paper first examines the extension of two-frequency, or Δk, near-nadir remote sensing techniques to off-nadir radar altimetry. A different approach to sea state sensing is investigated which appears to offer much higher accuracy. The second section examines the Δk method of sensing rough-surface area correlation or ocean wavenumber spectrum. The technique shows promise of directly sensing this parameter in contrast with synthetic-aperture radar methods which are based on complex wave interaction mechanisms and mathematical transformations requiring the acquisition of voluminous data.