An empirical model for energetic solar proton fluxes is presented. With this model the effects of such protons on geocentric space missions, to be flown during the next solar active period (1977-1983), and with orbits involving partial magnetospheric shielding, may be estimated. A synoptic background review is given, followed by a detailed discussion of the model's use, errors, uncertainties, and limitations, including sample calculations which demonstrate the application of specific or general project missions. Finally, for circular trajectories, percentage exposure maps are presented, depicting fractional mission times spent outside particular L shells as functions of orbit altitude and inclination. The distinguishing assumptions of this analysis are 1) that the solar proton flux in the 10-100 MeV energy range as accumulated over solar cycle 20 due to several active discrete events, will be accumulated at a uniform rate for the seven active years of solar cycle 21. and 2) that all protons in the energy range of interest have a common geomagnetic latitude cutoff.
Empirical solar proton model for orbiting spacecraft applications
Empirisches Sonnen-Protonen-Modell zur Anwendung vei erdumkreisenden Raumfahrzeugen
IEEE Transactions on Aerospace and Electronic Systems ; 10 , 4 ; 442-450
1974
9 Seiten, 8 Bilder, 2 Tabellen, 11 Quellen
Article (Journal)
English