Accession Number:

ADA066199

Title:

Analysis of Acoustical Effects of Receiver and Source Motions at Short Ranges in the Deep Ocean.

Descriptive Note:

Technical rept.,

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY N Y DEPT OF MATHEMATICAL SCIENCES

Report Date:

1979-03-01

Pagination or Media Count:

58.0

Abstract:

An analytical approach is used to determine general results for the effects of both receiver and source motions on a CW signal transmitted through a deep ocean channel at short ranges. A bilinear sound-speed profile is used. The receiver and source are restricted to the surface, and only SRBR rays are relevant. Time-dependent expressions for the total-field amplitude and phase are developed for appropriately limited time intervals, and numerical results are presented. General analytical expressions for the total field are derived and demonstrated to approximate closely numerical results. These expressions provide the basis for a study of the acoustical effects of varying motion parameters and initial range. It is demonstrated that effects of differences in range on total-field phase rate and the time interval between amplitude maxima are significant at short ranges and diminish as range increases. Effects on total field due to receiver motion are shown to be both significant and widely varying, depending on receiver and source directions and speeds. Author

Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE