Angular dependence of K-distributed sonar data

Type Article
Date 2007-05
Language English
Author(s) Le Chenadec Gilles1, Boucher Jean-Marc1, Lurton Xavier2
Affiliation(s) 1 : Ecole Natl Super Telecommun Bretagne, GET, F-29238 Brest 3, France.
2 : IFREMER, Ctr Brest, F-29280 Plouzane, France.
Source Geoscience and Remote Sensing, IEEE Transactions on (0196-2892) (IEEE Geoscience and Remote Sensing Society), 2007-05 , Vol. 45 , N. 5 , P. 1224-1235
DOI 10.1109/TGRS.2006.888454
WOS© Times Cited 16
Keyword(s) K distribution, Sonar statistical analysis, Seafloor classification
Abstract Backscattered signal statistics are widely used for target detection and seafloor characterization. The K-distribution shows interesting properties for describing experimental backscattered intensity statistics. In addition to the fact that its probability distribution function accurately fits actual sonar data, it advantageously provides a physical interpretation linked to the backscattering phenomenon. Sonar systems usually record backscattered signals from a wide angular range across the ship's track. In this context, previous studies have shown that backscatter statistics strongly depend on the incidence angle. In this paper, we propose an extension of previous works to model the angular evolution of the K-distribution shape parameter. This evolution is made clear and analyzed from experimental data recorded with two sonar systems: a 95-kHz multibeam echosounder and a 110-kHz sidescan sonar. Model fitting with data backscattered from six seafloor configurations shows the improvement provided by our extension as compared to two previous models.
Full Text
File Pages Size Access
publication-2599.pdf 12 848 KB Open access
Top of the page