title: Using cross-correlation techniques to assess the validity of AP8 at low altitude.
abstract: Background effects, such as single event upsets, are used as proxy data sets to evaluate AP8 at low attitude. The approach is to use a 2-D (longitude and latitude) cross-correlation between the background data set and the current-epoch AP8 predicted fluxes. The technique can be used to determine the energy of the particle that is producing a particular effect. This cross-correlation technique shows that using AP8 with a present-epoch magnetic field model accurately predicts the present location of the South Atlantic Anomaly proton flux enhancement and that a dual-peaked intensity structure above 100 MeV in the model is an artifact of AP8 and its interpolation routines.
authors.affiliation: Space Environmental Effects, Torrance, CA 90505, USA.
authors.forename: A L
authors.initials: AL
authors.lastname: Vampola
mesh_terms: D001267:Atlantic Ocean; D003627:Data Interpretation, Statistical; D005069:Evaluation Studies as Topic; D005118:Extraterrestrial Environment; D018499:Linear Energy Transfer; D008280:Magnetics; D008962:Models, Theoretical; D011522:Protons; D011834:Radiation Monitoring / Q000379:methods; D015203:Reproducibility of Results; D019445:Solar Activity; D013020:South America
chemical_list: D011522:Protons