Design study for a moored surface-scanning sonar
MetadataShow full item record
This report contains the results of a design study for a surface scanning sonar instrument capable of long-term deployment on ocean moorings. The instrument is intended to sample the bubble field just below the ocean's surface and compute the backscattered intensity and Doppler velocity in small unit volumes. The principal motivation for the development of such an instrument is to enhance the study of upper ocean processes by utilizing the ability of the sonar to detect surface waves and Langmuir circulation. Important design parameters for the instrument are investigated and a detailed design proposed. Key technical issues such as the trade-offs among spatial resolution, temporal resolution, velocity precision, total range, and power are discussed. The azimuthal motion of the instrument on a mooring is considered as a potential problem, and possible solutions are discussed. Matlab functions used for the investigations are included in an appendix.
Showing items related by title, author, creator and subject.
Godø, Olav Rune; Foote, Kenneth G.; Dybedal, Johnny (Acoustical Society of America, 2010-03-17)The difference-frequency band of the Kongsberg TOPAS PS18 parametric sub-bottom profiling sonar, nominally 1–6 kHz, is being used to observe Atlantic herring. Representative TOPAS echograms of herring layers and schools ...
Foote, Kenneth G.; Chu, Dezhang; Hammar, Terence R.; Baldwin, Kenneth C.; Mayer, Larry A.; Hufnagle, Lawrence C.; Jech, J. Michael (Acoustical Society of America, 2005-04)Development of protocols for calibrating multibeam sonar by means of the standard-target method is documented. Particular systems used in the development work included three that provide the water-column signals, namely ...
Analysis of 2-axis pencil beam sonar microbathymetric measurements of mine burial at the Martha’s Vineyard Coastal Observatory Gotowka, Brendan Reed (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2005-09)The changing state of warfare has driven the US Navy's area of operations closer to shore into littoral coastal waters. Mine Warfare has been proven as an extremely effective means of battlespace control in these ...