A circular orbit 35,900 km above the Earth's surface where most telecommunications satellites are located. Satellites in GEO orbit appear stationary relative to the rotating
Royal Academy of Engineering, Extreme Space Weather: Impacts on Engineered Systems and Infrastructure - Summary report, Glossary & Abbreviations and acronyms, ISBN 1-903496-96-9, London, UK 2013, http://www.raeng.org.uk/publications/reports/space -weather-summary-report, (Space Wthr - Amer) {861}