Accession Number : ADA265912


Title :   VLF Source Localization with a Freely Drifting Sensor Array


Descriptive Note : Doctoral thesis


Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB


Personal Author(s) : Chen, George C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a265912.pdf


Report Date : Sep 1992


Pagination or Media Count : 156


Abstract : Source localization and tracking capability of the freely drifting Swallow float volumetric array is demonstrated with matched-field processing (MFP) technique using data collected during the 1989 Swallow float experiment conducted in the Northwest Pacific, Marine Physical Laboratory's set of nine freely drifting, infrasonic sensors, capable of recording ocean ambient noise in the 1- to 25-Hz range, was deployed to span the water column of 4100-m depth, with horizontal aperture on the order of 5 km. Even though the floats were drifting, their positions were determined with the 8-kHz internal navigation system and a postprocessing least-squares-based localization procedure


Descriptors :   *OCEAN SURFACE , *FLOATS , *BEAM FORMING , *ACOUSTIC DETECTORS , *ACOUSTIC ARRAYS , SIGNAL PROCESSING , DATA ACQUISITION , UNDERWATER ACOUSTICS , ACOUSTIC DATA , VERY LOW FREQUENCY , INFRASOUND , TRAVEL TIME , ACOUSTIC VELOCITY , AMBIENT NOISE , DRIFT , LEAST SQUARES METHOD , SIGNAL TO NOISE RATIO , DEPTH


Subject Categories : Marine Engineering
      Acoustic Detection and Detectors
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE