Accession Number : AD0848487

Title :   Detection of Surface Electromagnetic Effects.

Descriptive Note : Final rept.,

Corporate Author : POLYTECHNIC INST OF BROOKLYN FARMINGDALE NY DEPT OF ELECTROPHYSICS

Personal Author(s) : Laemmel, Arthur E.

Report Date : SEP 1968

Pagination or Media Count : 28

Abstract : The object of the research was mainly to develop means for detecting underwater objects through their effects on surface conditions. There are many surface disturbances caused by a submerged object which are large enough to be easily measured; however, in almost every case there is a corresponding natural random disturbance which would mask the desired 'signal.' The problem thus is one of filtering the signal from the background noise, and it is the theory of one such filter that is described here. Some experiments conducted in a ripple tank are also described, and a brief discussion of some practical aspects of use under actual sea conditions is included. (Author)

Descriptors :   (*UNDERWATER OBJECT LOCATORS, ELECTROMAGNETIC RADIATION), UNDERWATER OBJECTS, WAKE, ELECTROMAGNETIC WAVE FILTERS, SURFACE PROPERTIES, NOISE(RADIO), BACKGROUND.

Subject Categories : Infrared Detection and Detectors
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE