M.Sc., Faculty of Science, University of the Witwatersrand, 2011 / Sea
oor massive sulphides are deep sea mineral deposits currently being examined as a potential
mining resource. Locating these deposits, which occur at depths in the order of 2km, is currently
performed by expensive submersible sonar platforms as conventional sonar bathymetry products
gathered by sea surface platforms do not achieve adequate spatial resolution.
This document examines the use of so-called high resolution beamforming methods (such as
MUSIC and ESPRIT) for sonar bathymetry, together with combinations of parameter estimation
techniques, including techniques for full rank covariance matrix estimation and signal enumeration.
These methods are tested for bathymetric pro le accuracy using simulated data, and compared to
conventional bathymetric methods.
It was found that high resolution methods achieved greater bathymetric accuracy and higher
resolution than conventional beamforming. These methods were also robust in the presence of
unwanted persistent signals and low signal to noise ratios.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/11337 |
| Date | 23 February 2012 |
| Creators | Mitchley, Michael |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | application/pdf |
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