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Performance Analysis of Mars Express Star Trackers
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The acquisition and tracking performance of the Mars Express star trackers is depending on occultation or disturbance of their field of view by Mars, as well as on the quality of the sky and adequacy of the on-board star catalogue in this region. At system level, the attitude orbit and control system is in charge of monitoring the performance of this inertial attitude data vital to the mission. The attitude orbit and control system can power-cycle a suspected faulty star tracker or use the second backup one.The proposed degree project will be carried out within the Mars Express Flight Control Team at the European Operation and Control Center in Darmstadt. In the course of the analysis, performance stress factors like occultation or sky quality and the resulting unwanted system behavior will be characterized taking into account on-board constellation maps. In this regard, possible seasonal effects will be identified and validated through telemetry processing. Already existing fault detection isolation and recovery schemes will be critically reviewed.In a final step, the obtained results will be applied and compared to performance factors of the STELLA star tracker which was developed at the University of W├╝rzburg.

Place, publisher, year, edition, pages
2011. , 93 p.
Keyword [en]
Technology, Mars Express, MEX, Star Tracker, Performance Analysis, Albedo, Occultation, Field of View, FOV, STR, Sky Quality, Stray Light, STELLA, Attitude Determination, CCD, Background Noise, Simulation, Model, Scilab
Keyword [sv]
URN: urn:nbn:se:ltu:diva-45106Local ID: 2d61a37c-0fe8-415e-a9a8-b59ceda391daOAI: diva2:1018386
Subject / course
Student thesis, at least 30 credits
Educational program
Space Engineering, master's level
Validerat; 20111124 (anonymous)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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