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 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.


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    Title :

    Empirical Solar Proton Model for Orbiting Spacecraft Applications


    Contributors:

    Published in:

    Publication date :

    1974-07-01


    Size :

    2085697 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Empirical solar proton model for orbiting spacecraft applications

    Stassinopoulos, E. G. / King, J. H. | NTRS | 1974


    Empirical solar proton model for orbiting spacecraft applications

    Stassinopoulos, E.G. / King, J.H. | Tema Archive | 1974




    THE ORBITING SOLAR OBSERVATORY SPACECRAFT

    Bartoe, O. E. / Dolder, F. P. / Gablehouse, R. H. et al. | NTRS | 1963