TY - JOUR
T1 - Angular distribution of protons measured by the energetic particle telescope on PROBA-V
AU - Borisov, Stanislav
AU - Benck, Sylvie
AU - Cyamukungu, Mathias
AU - Oabrien, Paul
AU - Mazur, Joseph
AU - Nieminen, Petteri
AU - Evans, Hugh
AU - Daly, Eamonn
N1 - Publisher Copyright:
© 1963-2012 IEEE.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - Angular distribution and contamination of proton spectra measured at LEO are considered as possible sources of discrepancies between fluxes obtained by different instruments. In particular, not accounted for pitch angle distribution and East/West asymmetry of energetic proton fluxes have been suspected of leading to the reported underestimates of these fluxes by the NASA Model AP8. The energetic particle telescope (EPT) was designed as a science-class instrument aimed at providing uncontaminated fluxes of electrons (0.5-20~\hbox{MeV}), protons (9.5-300~\hbox{MeV}) and \alpha-particles (38-1200~\hbox{MeV}) getting into the instrument from within a well-defined Field Of View (FOV). The PROBA-V satellite with EPT was launched on May 7th, 2013 on a LEO, 820 km altitude, 98.7\circ inclination and a 10:30-11:30 Local Time at Descending Node. Based on the data acquired by the EPT on board PROBA-V, we account for flux angular distribution effects to provide a definitive reply to the basic question: 'does AP8 underestimate E > 100~\hbox{MeV}proton fluxes around B/{B-0} = 1.1, L = 1.3'?
AB - Angular distribution and contamination of proton spectra measured at LEO are considered as possible sources of discrepancies between fluxes obtained by different instruments. In particular, not accounted for pitch angle distribution and East/West asymmetry of energetic proton fluxes have been suspected of leading to the reported underestimates of these fluxes by the NASA Model AP8. The energetic particle telescope (EPT) was designed as a science-class instrument aimed at providing uncontaminated fluxes of electrons (0.5-20~\hbox{MeV}), protons (9.5-300~\hbox{MeV}) and \alpha-particles (38-1200~\hbox{MeV}) getting into the instrument from within a well-defined Field Of View (FOV). The PROBA-V satellite with EPT was launched on May 7th, 2013 on a LEO, 820 km altitude, 98.7\circ inclination and a 10:30-11:30 Local Time at Descending Node. Based on the data acquired by the EPT on board PROBA-V, we account for flux angular distribution effects to provide a definitive reply to the basic question: 'does AP8 underestimate E > 100~\hbox{MeV}proton fluxes around B/{B-0} = 1.1, L = 1.3'?
KW - AP8
KW - EPT
KW - Energetic Particle Telescope
KW - Space radiation model
KW - energetic protons
KW - pitch angle distribution
KW - radiation belts
KW - space radiation environment
UR - http://www.scopus.com/inward/record.url?scp=84919941327&partnerID=8YFLogxK
U2 - 10.1109/TNS.2014.2361951
DO - 10.1109/TNS.2014.2361951
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AN - SCOPUS:84919941327
SN - 0018-9499
VL - 61
SP - 3371
EP - 3379
JO - IEEE Transactions on Nuclear Science
JF - IEEE Transactions on Nuclear Science
IS - 6
M1 - 6975247
ER -