Drift shell tracing and secular variation of inner zone high energy proton environment in the SAA
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Authors
Pu, Z.Y.
Xie, L.
Jiao, W.X.
Fu, S.Y.
Fang, X.H.
Zong, Q.G.
Heynderickx, D.
Discipline
Physical sciences
Subject
Mathematical models
Orbits
Radiation belts
Drift shell
Inner radiation belt
SAA
Secular variation of radiation belt
Protons
Audience
Scientific
Date
2005Metadata
Show full item recordDescription
To investigate long-term variations of the inner zone high-energy proton environment at low orbits, we developed the drift shell tracing (DST) approach by using the adiabatic approximation of charged particle motion with the NASA standard radiation models as reference states. The DST results show that over the past three decades fluxes of high-energy protons at altitudes ∼ 1000 km in the South Atlantic Anomaly (SAA) noticeably increased and the centre region of the proton SAA apparently moved westward and expanded. Calculations of the L-averaged lifetime of high-energy protons indicate that the DST approach provides a reasonable means for estimation of the secular variation of the inner zone proton environment.
Citation
Pu, Z.Y.; Xie, L.; Jiao, W.X.; Fu, S.Y.; Fang, X.H.; Zong, Q.G.; Heynderickx, D. (2005). Drift shell tracing and secular variation of inner zone high energy proton environment in the SAA. , Advances in Space Research, Vol. 36, Issue 10, 1973-1978, DOI: 10.1016/j.asr.2004.09.018.Identifiers
scopus: 2-s2.0-27844508584
Type
Article
Peer-Review
Yes
Language
eng