Accession Number : AD0724335

Title :   Spectra, Covariance Functions, and Associated Statistics of Underwater Acoustic Scattering from Lake Surface,

Corporate Author : TEXAS UNIV AUSTIN APPLIED RESEARCH LABS

Personal Author(s) : Plemons,Terry D.

Report Date : 03 APR 1971

Pagination or Media Count : 151

Abstract : A statistical analysis using ensemble averages is made of reverberation data obtained from the wind-driven surface of a fresh water lake. To produce the reverberation, gated FM and cw pulses are transmitted to insonify the scattering surface. The center frequency of each transmitted signal is 110 kHz. Two pulse durations, of 0.1 msec and 1.0 msec, are used in the cw experiment. The bandwidth of the FM signals, whose pulse durations are 1.25 msec, is 9.6 kHz. The transmitter and receiver are located at essentially the same place (R at T); i.e., the operation is monostatic. In the cw experiment the grazing angle is 22 deg and in the FM experiment the grazing angle is 0 deg. (Author)

Descriptors :   (*ACOUSTIC SIGNALS, REVERBERATION), (*LAKE WAVES, UNDERWATER SOUND), ACOUSTICS, STATISTICAL ANALYSIS, EXTREMELY HIGH FREQUENCY, INTENSITY, SCATTERING

Subject Categories : Physical and Dynamic Oceanography
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE