Accession Number : AD0782336

Title :   Equations for the Prediction of Sound Speed in the Mediterranean Sea. Volume I. Below 500 Meters.

Descriptive Note : Research and development Jul 72-Jun 73,


Personal Author(s) : Frye,H. W. ; Kelly,N. V.

Report Date : MAY 1974

Pagination or Media Count : 53

Abstract : Stepwise regression analysis was used in the reduction of historical Nansen data to develop four mathematical models which, together, describe the sound-speed distribution below 500 meters in the Mediterranean Sea. Using polynomial expressions in only three variables (longitude, latitude, and depth) representations of the Nansen data were found, with standard deviations in a range between 0.256 and 0.311 meters/second and percent variances explained by regression ranging from 99.69 to 99.88 percent. Several comparisons of the observed data with the sound-speed predictions from the models showed close agreement. The accuracy and simplicity of the models make them well-suited for surveillance applications, sonar modeling, on-board prediction, and information retrieval systems. (Author)

Descriptors :   *Sonar signals, *Mediterranean Sea, *Underwater sound, *Acoustic velocity, Salinity, Temperature, Mathematical prediction, Statistical analysis

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE