Mathematics
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....5..340h&link_type=abstract
In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 5 p 340-343 (SEE N85-34991 23-93)
Mathematics
Flux (Rate), Geomagnetism, Mathematical Models, Primary Cosmic Rays, Reflectance, Shadows, Terrestrial Radiation, Aerospace Environments, Azimuth, Earth Albedo, Magnetic Fields, Space Stations, Trajectory Analysis
Scientific paper
The possibility to construct a unit sphere of access that describes the cosmic radiation allowed to an Earth-orbiting spacecraft is discussed. It is found that it is possible to model the occluded portion of the cosmic ray sphere of access as a circular projection with a diameter bounded by the satellite-Earth horizon. Maintaining tangency at the eastern edge of the spacecraft-Earth horizon, this optically occluded area is projected downward by an angle beta which is a function of the magnetic field inclination and cosmic ray arrival direction. This projected plane, corresponding to the forbidden area of cosmic ray access, is bounded by the spacecraft-Earth horizon in easterly directions, and is rotated around the vertical axis by an angle alpha from the eastern direction, where the angle alpha is a function of the offset dipole latitude of the spacecraft.
Humble John E.
Shea Margaret Ann
Smart Don Frederick
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