Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629065
Title: Simulating Martian geomorphology
Author: Matthews, David
Awarding Body: University of Dundee
Current Institution: University of Dundee
Date of Award: 2007
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Abstract:
The Planetary And Natural scene Generation Utility (P ANGU) , developed at the University of Dundee for the European Space Agency (ESA), successfully generates stochastic Digital Elevation Models (DEMs) of simulated planetary surfaces. P ANGU was developed to allow development and extensive testing of vision-guided navigation software for autonomous planetary landers. PANGU's initial scope was to model airless bodies such as the Moon and Mercury. ESA has outlined the Mars exploration programme for the next few decades as part of its Aurora programme. In this context, "Modelling Martian Geomorphology" looks at extending PANGU's capabilities to allow the modelling of Martian surfaces. A review of available Martian remote sensing data is undertaken and a summary of Martian terrain types is provided. From this, the requirements for a Martian surface model are derived. The development of a stochastic sand dune model was identified as a key addition to allow P ANGU to model Mars. Existing geomorphological sand dune models concentrate on modelling the dynamic processes that generate sand dunes. A dynamic model developed by Werner is implemented in PANGU. Novel aspects of this research are, running the model over existing surfaces and exploration of scale factors for use in a P ANGU hierarchical model. The model though proves to be scale dependent and is not directly suitable for use in PANGU. Research is undertaken into feature extraction from the dynamic model. Dune crests and toe locations are extracted and a geometric model of the dune cross-section is used to reconstruct the dune. This generates a model that can be rendered at a range of scales as required by PANGU. This model suffers from artefacts introduced in the dune reconstruction where dunes overlap. An entirely static model is developed based on the random placement of barchan dunes. Where these overlap, they are merged to produce barchanoid ridge dunes. With high densities of initial barchan dunes, after merging, transverse dune fields are created. This method has been implemented in P ANGU and used in development research by ESA.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.629065  DOI: Not available
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