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Design and Testing of the Star Trackers for the SEAM Nanosatellite
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Star trackers are instruments for attitude determination and are a must for spacecrafts whereprecise attitude knowledge is needed. Star trackers take accurate images of the stars and thenperform image processing and pattern recognition in order to accurately determine the attitude.This requires high processing power, size and mass of the instrument, which are limited oncubesats.In this thesis work the sensor of a star tracker has been characterized, and calibration andimage correction procedures that require low processing capabilities have been developed. Thethesis work also includes the design of the star tracker in CAD software, with special attentionbeing payed to the baffle due to the limited size available and the importance of stray radiationsuppression. Stray radiation suppression is especially important due to limited ability for correctionson image level. Furthermore, a method for processing the used star catalog has beendeveloped so the stellar brightness in the catalog corresponds to the brightness detected by thestar tracker.

Place, publisher, year, edition, pages
Keyword [en]
Technology, miniature star tracker, cubesat, testing, image sensor characterization, star catalog, baffle, optomechanical design
Keyword [sv]
URN: urn:nbn:se:ltu:diva-59150Local ID: fabde1dc-4757-42a6-9340-43e3e5dd7f85OAI: diva2:1032538
External cooperation
Subject / course
Student thesis, at least 30 credits
Educational program
Space Engineering, master's level
Validerat; 20150111 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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