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Science 9 October 1970:
Vol. 170. no. 3954, pp. 158 - 161
DOI: 10.1126/science.170.3954.158
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Articles

Bistatic-Radar Observation of Long-Period, Directional Ocean-Wave Spectra with Loran A

Allen M. Peterson 1, Calvin C. Teague 1, and G. Leonard Tyler 1

1 Center for Radar Astronomy, Stanford University, Stanford, California 94305

Bistatic-radar scattering from medium- to long-wavelength (80 to 200 meters) ocean waves has been observed with the use of loran A (1.85 megahertz) transmissions and a receiver located 280 kilometers away. The received echoes have been converted into a time-delay, Doppler-frequency map in which the effects of anisotropies in the ocean-wave spectra are clearly shown. The distribution of the echoes in delay-Doppler space is consistent with Bragg scattering from trains of dispersed ocean waves.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)