Using side scan sonar in the characterization of the continental shelf: Touros area

Abstract

This paper presents a sonographic mapping of an area of the Brazilian continental shelf adjacent to Touros city-RN, NE Brazil. Data were acquired in lines parallel to the coast line, with a total area of 58 km². The equipment used was Side Scan Sonar 272 -TD, operated both with frequency of 100 kHz. As a result was possible to correlate clearly the sonar data with the satellite image and identify different reflection patterns.

A New Radiometric Correction Method for Side-Scan Sonar Images in Consideration of Seabed Sediment Variation

“…These effects cause significant radiometric distortion in SSS images, degrade image quality, and limit the application of such images [10]. Many scholars have studied methods of eliminating these effects [9][10][11][12][13][14][15]. Time varying gain (TVG) is often used to compensate for transmission losses through the use of a theoretical formula [11].…”

“…Many scholars have studied methods of eliminating these effects [9][10][11][12][13][14][15]. Time varying gain (TVG) is often used to compensate for transmission losses through the use of a theoretical formula [11]. However, TVG cannot always accurately compensate for transmission losses in applications due to the use of improper or empirical parameters, so radiometric distortion induced by TVG residuals appears in SSS images.…”