Engineering tool for trapped proton flux anisotropy evaluation
Pitch angle distribution
Trapped proton fluxes
MetadataShow full item record
At low altitudes, the high-energy trapped proton fluxes are strongly anisotropic. The proton flux is controlled by the density distribution of the Earth's atmosphere that induces a steep pitch-angle distribution and an East-West effect, the latter caused by the finite size of the proton gyration radius. We have developed a software package, ANISO, to evaluate averaged energy spectra of trapped proton unidirectional fluxes for a given spacecraft orbit and attitude by deducing the angular-dependent proton flux spectra from the AP-8 omnidirectional flux. Included in the model are both the Armstrong et al. (1990) model and a model based on the Badhwar and Konradi (1990) pitch-angle distribution.
CitationKruglanski, M. (1996). Engineering tool for trapped proton flux anisotropy evaluation. , Radiation Measurements, Vol. 26, Issue 6, 953-958, DOI: 10.1016/S1350-4487(96)00097-2.