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Estimation of sea surface topography with interferometric radar
Abstract
This dissertation presents the design and initial experimental results of a second generation FOcused Phased Array Imaging Radar (FOPAIR-II) demonstrating its capability to measure areas on the order of 20 meters x 20 meters with 0.375 meter range resolution and 1° beamwidth. An analysis of the error budget for the given geometry is presented, yielding a worst case height bias of 4.5 cm and an expression for determination of the uncertainty given signal-to-noise ratio and the temporal lag between interferometer measurements. The processing algorithm is shown and a method for distortion removal is described based on basic assumptions of the properties of the ocean surface over a time average. Comparison of significant wave height measurements with the in-situ sensors shows a correlation of 0.92, with a slope of 0.97 and an intercept of −0.001 meters. Absolute height measurement comparison reveals a correlation between the radar estimated absolute height and a nearby tide gauge of 0.94, with a slope of 1.60 and an intercept of 0.75 meters.
Subject Area
Electrical engineering|Remote sensing
Recommended Citation
Eshbaugh, James Vernon, "Estimation of sea surface topography with interferometric radar" (2000). Doctoral Dissertations Available from Proquest. AAI9978494.
https://scholarworks.umass.edu/dissertations/AAI9978494