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Suppression of multiple reflections in GLORIA sidescan sonar imagery
Author(s) -
Le Bas Timothy P.,
Mason David C.
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/94gl00307
Subject(s) - seabed , sonar , geology , side scan sonar , remote sensing , oceanography
The GLORIA side‐scan sonar system is an invaluable tool for studying the texture of the sea floor. A substantial set of computer algorithms now exist for radiometric and geometric correction of the raw GLORIA imagery. One type of artefact not presently removed is bright lines parallel to the ship track due to multiple reflections between the seabed and the sea surface. These are common where the sea floor is flat and can lead to misinterpretation. A method is presented here to suppress multiple reflections in GLORIA and other side‐scan sonar imagery. As a by‐product of the suppression method a value for the seabed backscattering coefficient can be calculated, giving some extra insight regarding sea‐floor type for sedimentary areas.