A Technique for Estimating RMS Waveheight and Dominant Wave Period Using A Coherent Shipboard Radar

Techniques are described which utilize a marine navigation radar to measure dominant wave period and radar Doppler spectral characteristics of sea scatter, and allow an estimate of rms wave height. Along with a measure of the sea surface radar cross section, one can then estimate wind stress, including both gravity and capillary wave contributions. Such techniques could ultimately be used to provide surface truth for satellite remote sensors, as well as serve a source of synoptic data if a sufficient number of commercial vessels were equipped appropriately. We also present some preliminary experimental measurements from a program utilizing NOAA and Navy resources.