In-Orbit Monitoring of Space Weather and Its Effects on Commercial- Off-The-Shelf (COTS) Electronics - A Decade of Research Using Micro-Satellites

Details In-Orbit Monitoring of Space Weather and Its Effects on Commercial- Off-The-Shelf (COTS) Electronics - A Decade of Research Using Micro-Satellites In-Orbit Monitoring of Space Weather and Its Effects on Commercial- Off-The-Shelf (COTS) Electronics - A Decade of Research Using Micro-Satellites

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.341u&link_type=abstract

IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,

Computer Science

Performance

Scientific paper

Over the past 20 years the University of Surrey has gained significant experience in the use of commercial-off-the-shelf (COTS) devices operating in low-Earth orbit through the design, manufacture, launch and operation of more than a dozen "UoSAT" micro-satellites. The deleterious effects of the ionising radiation environment is of particular concern when using COTS technologies in space, and over the last decade, particular emphasis has been given to a programme of monitoring "space weather" in terms of the high energy proton and heavy-ion cosmic-ray environment these spacecraft encounter, and to observing and analysing its effects - particularly with regard to single-event effects - upon the COTS devices on-board. The extended period of research has enabled a wide variety of conditions to be observed ranging across an entire solar cycle. This paper reports on the environment and effects observed, and describes the various methodologies that have been used to minimise the risk associated with the use of COTS devices in space. The practical importance of resilient error-detection and correction coding schemes to protect spacecraft data and control software is shown, as is the need for adequate levels of shielding against total ionising radiation dose. The relative effects of Galactic-Cosmic-Rays (GCRs), Solar Proton Events (SPEs) and trapped proton environments in Low-Earth orbit are discussed, and more recent flight data extends these observations out to very high orbit - approx 60,000 km altitude. As well as gaining practical data on space weather and its effects on advanced electronics, the research has resulted in the design and construction of a series of inexpensive, compact, and low- power particle detectors, which are capable of providing routine environmental "health" warnings for future operational spacecraft. Low cost micro-satellites have proven to be ideal vehicles for quick response and cost effective space technology verification missions, where environmental data has been gathered with regard to providing practical engineering data on systems' performance and reliability.

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