Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.592760
Title: Feasability of lidar missions in low altitude orbits maintained by electric propulsion
Author: Leveque, Nicolas Didier Robert Rober
Awarding Body: Kingston University
Current Institution: Kingston University
Date of Award: 2012
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Abstract:
Lidars are very promising instruments for the remote-sensing of the Earth, and are eagerly awaited for operational missions, particularly in the observation of the atmosphere. However, spaceborne lidars are still in their early development and there have been many setbacks associated with their technology. The high energy of the laser beam contributes to the formation of contamination deposit on laser optics, leading to the degradation of the lidar performance and eventual failure of the instrument. This high energy requirement can partially or totally be offset by a larger telescope and / or a lower orbit, with the implication of a greater drag force acting on the satellite. This work investigates the options for satellite and lidar telescope configuration which minimise their contribution to drag while maximising the telescope aperture diameter for lidar performance. A MATLAB/Simulink trajectory model is developed to establish the propulsion requirements for drag compensation. Parametric models are used to size the satellite, its subsystem and the lidar. This study elaborates the conditions under which a lidar mission might work in a low altitude orbit. In particular, it explores the feasibility and applicability of four concepts against the requirements of some challenging lidar missions. The model developed also identifies that past studies may have under-estimated the electric propulsion requirements for lidar missions in low altitudes.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.592760  DOI: Not available
Keywords: Mechanical ; aeronautical and manufacturing engineering
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