Analysis on Space Environment from the Anomalies of Geosynchronous Satellites

Details Analysis on Space Environment from the Anomalies of Geosynchronous Satellites Analysis on Space Environment from the Anomalies of Geosynchronous Satellites

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jass...26..521l&link_type=abstract

Journal of Astronomy and Space Sciences. Vol. 26, no. 4, 521-528

Astronomy and Astrophysics

Astronomy

Satellite, Spacecraft, Geosynchronous, Anomaly

Scientific paper

While it is well known that space environment can produce spacecraft anomaly, defining space environment effects for each anomalies is difficult. This is caused by the fact that spacecraft anomaly shows various symptoms and reproducing it is impossible. In this study, we try to find the conditions of when spacecraft failures happen more frequently and give satellite operators useful information. Especially, our study focuses on the geosynchronous satellites which cost is high and required high reliability. We used satellite anomaly data given by Satellite News Digest which is internet newspaper providing space industry news. In our analysis, 88 anomaly cases occurred from 1997 to 2008 shows bad corelation with Kp index. Satellite malfunctions were likely to happen in spring and fall and in local time from midnight to dawn. In addition, we found the probability of anomaly increase when high energy electron flux is high. This is more clearly appeared in solar minimum than maximum period

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