Accession Number : AD0742824

Title :   Use of a Coherent Frequency Synthesizer in Echo-Sounder Studies of Deep Scattering Layers.

Descriptive Note : Technical rept.,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS

Personal Author(s) : McElroy,Paul T.

Report Date : MAY 1972

Pagination or Media Count : 12

Abstract : A coherent frequency synthesizer under computer control is used to generate a pulse train which is power amplified and drives a UQN transducer. A pulse train at the two frequencies, 9.5 and 17kHz, is used to examine the deep scattering layers at 35 degrees 00 min N, 48 degrees 00 min W during the sunset migration. Striking differences in the scattering returns, as displayed on a facsimile recorder, show the utility of this method for increased frequency coverage in studies of deep scattering layers. (Author)

Descriptors :   (*UNDERWATER SOUND, SCATTERING), (*ECHO RANGING, DEEP WATER), (*FREQUENCY SYNTHESIZERS, ECHO RANGING), MULTIPLE OPERATION, POWER AMPLIFIERS, COMPUTERS, TRANSDUCERS, RECORDING SYSTEMS, REFLECTION

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE