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Telemetry Storage and Donwlink Management for a LEO Satellite

Authors:
Dongseok Chae

Keywords: telemetry, downlink, flight software

Abstract:
Because Low Earth Orbit (LEO) satellite has very limited contact time between satellite and ground station, all telemetry data generated on satellite are stored in a mass memory and downlinked to the ground together with real-time data during the contact time. There are two mass memory modules. Normally, one mass memory module is used and the other is ready for backup. If required, both memory modules can be used at the same time. If the selected module is not available, the other module can be automatically used for telemetry storage without ground intervention. Two downlink channels are available at the same time but only one channel should be used for downlink. The downlink channel can be changed automatically by on-board flight software as well as step by step by ground command. This paper presents the telemetry storage and downlink management method implemented in flight software of a LEO satellite developed in Korea. All functions related to telemetry storage and downlink management were fully verified through the real satellite operation as well as the various tests during satellite development phase

Pages: 18 to 21

Copyright: Copyright (c) IARIA, 2014

Publication date: February 23, 2014

Published in: conference

ISSN: 2308-4480

ISBN: 978-1-61208-317-9

Location: Nice, France

Dates: from February 23, 2014 to February 27, 2014