March 1970 | NTIA Technical Memo ERL TM ITS 233

Instrumentation for observing HF sea scatter

James M. Watts

Abstract: This paper describes instrumentation for recording digitally the relative phase and amplitude of MF and HF radio signals back­scattered from ocean waves. Eight stepped frequencies, two spaced receiving antennas, and four different ranges are used. The coherent system allows spectra and correlations to be calculated by a general purpose computer.

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