Accession Number : ADA257378


Title :   Modeling a 300 kHz Bathymetric Sonar System


Descriptive Note : Master's thesis


Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MA


Personal Author(s) : Malmquist, Kenneth A.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA257378


Report Date : SEP 1992


Pagination or Media Count : 124


Abstract : The Deep Submergence Laboratory has developed a family of calibrated high frequency bathymetric sonar systems for underwater survey. It is useful to have a detailed mathematical description of these systems to assist in data processing. A model of a generalized sonar system is developed first. This model then is made specific to the DSL 300-kHz forward scanning sonar and is implemented using the MATLAB software package. The model consists of a cascaded series of filters representing the electrical and mechanical components of the system. The model is adjusted after comparison to the transmitted pulse. The results are then inverted to demonstrate how the corrupting effects of the system can be reversed. A technique is developed for applying this reverse model to actual data. The results showed that a good representation of the system can be implemented using relatively simple descriptions of each component. The most important components are the band-limiting filter and the transducer. It is possible to reverse model these components with good results.


Descriptors :   *SCANNING SONAR , *DEEP SUBMERGENCE , SCANNING , FREQUENCY , DATA PROCESSING , HIGH FREQUENCY , MODELS , PROCESSING , COMPARISON , PULSES , SURVEYS , TRANSDUCERS , LABORATORIES , FILTERS , SONAR , MECHANICAL COMPONENTS


Subject Categories : PHYSICAL AND DYNAMIC OCEANOGRAPHY
      ACOUSTIC DETECTION AND DETECTORS


Distribution Statement : APPROVED FOR PUBLIC RELEASE