• DOI:10.1029/2010SW000597
• Corpus ID: 120192698

Analysis of GEO spacecraft anomalies: Space weather relationships

@article{Choi2011AnalysisOG,
  title={Analysis of GEO spacecraft anomalies: Space weather relationships},
  author={Ho-Sung Choi and Jaejin Lee and Kyung-Suk Cho and Youngjoo Kwak and Il-Hyun Cho and Young-deuk Park and Yeon-Han Kim and Daniel N. Baker and Geoffrey D. Reeves and Dong-Kyu Lee},
  journal={Space Weather},
  year={2011},
  volume={9}
}

• Ho-Sung Choi, Jaejin Lee, +7 authors Dong-Kyu Lee
• Published 1 June 2011
• Physics
• Space Weather

While numerous anomalies and failures of spacecraft have been reported since the beginning of the space age, space weather effects on modern spacecraft systems have been emphasized more and more with the increase of their complexity and capability. However, the relationship between space weather and commercial satellite anomalies has not been studied extensively. In this paper, we investigate the geostationary Earth orbit (GEO) satellite anomalies archived by Satellite News Digest during 1997–2009 in order to search for possible influences of space weather on the anomaly occurrences. We analyze spacecraft anomalies for the Kp index, local time, and season and then compare them with the tendencies of charged particles observed by Los Alamos National Laboratory (LANL) satellites. We obtain the following results: (1) there are good relationships between geomagnetic activity (as measured by the Kp index) and anomaly occurrences of the GEO satellites; (2) the satellite anomalies occurred mainly in the midnight to morning sector; and (3) the anomalies are found more frequently in spring and fall than summer and winter. While we cannot fully explain how space weather is involved in producing such anomalies, our analysis of LANL data shows that low‐energy (<100 keV) electrons have similar behaviors with spacecraft anomalies and implies the spacecraft charging might dominantly contribute to the GEO spacecraft anomalies reported in Satellite News Digest.