Conference Paper

Safety critical RTOS for space satellites

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Abstract

In many practical applications, that can be found in control engineering, the functionality and safety of the overall control process rely on a proper function of the respective operating system. This fact makes the software one of the most safety critical elements of such practical applications, especially when the control process is placed in an inhospitable environment not directly accessible to man. One of such environments is Space. In this paper a problem of designing a safety critical real time operating system for a small space satellite called CubeSat is discussed. It is shown how to design such an operating system and how to increase its reliability and to protect it against single upset events.

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... A specialized team, brought together by SOSA, designed and constructed almost all of the satellite and its subsystems: circuit boards, sensors, power system unit, onboard computer, parts of the testing equipment, software, testing and calibration methods, etc. The heart of the satellite is a redundant computer with a radiation hardened processor and a custom real-time operating system [10], [11]. The communication module is redundant as well. ...
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