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| Titel |
The long-term effects of space weather on satellite operations |
| VerfasserIn |
D. T. Welling |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 6 ; Nr. 28, no. 6 (2010-06-24), S.1361-1367 |
| Datensatznummer |
250016851
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| Publikation (Nr.) |
 copernicus.org/angeo-28-1361-2010.pdf |
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| Zusammenfassung |
| Integrated lifetime radiation damage may cause spacecraft to become
more susceptible to operational anomalies by changing material
characteristics of electronic components. This study demonstrates and
quantifies the impact of these effects by examining the National Oceanic and
Atmospheric Administration (NOAA) National Geophysical Data Center (NGDC)
satellite anomaly database. Energetic particle data from the Geostationary
Operational Environmental Satellites (GOES) is used to construct the total
lifetime particle exposure a satellite has received at the epoch of an
anomaly. These values are compared to the satellite's chronological age and
the average exposure per year (calculated over two solar cycles.) The results
show that many anomalies occur on satellites that have received a total
lifetime high-energy particle exposure that is disproportionate to their age.
In particular, 10.8% of all events occurred on satellites that received over
two times more 20 to 40 MeV proton lifetime particle exposure than predicted
using an average annual mean. This number inflates to 35.2% for 40 to 80 MeV
protons and 33.7% for ≥2 MeV electrons. Overall, 73.5% of all
anomalies occurred on a spacecraft that had experienced greater than two
times the expected particle exposure for one of the eight particle
populations used in this study. Simplistically, this means that the long term
radiation background exposure matters, and that if the background radiation
is elevated during the satellite's lifetime, the satellite is likely to
experience more anomalies than satellites that have not been exposed to the
elevated environment. |
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