A Star Tracker based Attitude Determination System

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dc.contributor.advisor Cater, John Edward
dc.contributor.advisor Rattenbury, Nicholas James
dc.contributor.author Papotti, Gabor
dc.date.accessioned 2021-08-24T23:45:29Z
dc.date.available 2021-08-24T23:45:29Z
dc.date.issued 2021 en
dc.identifier.uri https://hdl.handle.net/2292/56138
dc.description.abstract The development of an Attitude Determination System (ADS) based on a Star Tracker is described. The ability to achieve the performance required to enable optical alignment from Low Earth Orbit (LEO) to ground station is investigated. Commercially available (COTS) hardware, and open-source software, are selected to design and simulate the Star Tracker. The unit is intended for implementation in a U-class nanosatellite, also defined as CubeSat. A review of ADSs based on Star Trackers is presented, including heritage satellite missions implementing similar hardware. The importance of the Star Tracker as a self-sufficient attitude sensor is highlighted. Concepts and techniques aimed to improve the performance of pointing accuracy and sampling frequency are analysed and implemented. A program simulating the celestial sphere is developed to produce synthetic calibrated images of the starfields surrounding Earth. The algorithms implemented in the Star Tracker are tested using synthetic images, and the results are presented. The Star Tracker produces attitude solutions at a sampling frequency of 1:83 Hz, with a pointing accuracy of 11:051° when pointing between -90° and 90° Declination, and a pointing accuracy of 0:244° when pointing between -45° and 45° Declination. The Star Tracker based ADS system demands further development to achieve the intended performance, but a promising approach for the reduction of mass, volume and cost in the development of an ADCS for CubeSats is presented.
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof Masters Thesis - University of Auckland en
dc.relation.isreferencedby UoA en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/nz/
dc.title A Star Tracker based Attitude Determination System
dc.type Thesis en
thesis.degree.discipline Engineering Science
thesis.degree.grantor The University of Auckland en
thesis.degree.level Masters en
dc.date.updated 2021-06-14T22:45:12Z
dc.rights.holder Copyright: the author en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en

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