Cosmic ray cutoffs at 400 KM applicable to the HEAO-C satellite

Details Cosmic ray cutoffs at 400 KM applicable to the HEAO-C satellite Cosmic ray cutoffs at 400 KM applicable to the HEAO-C satellite

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icrc....4..303h&link_type=abstract

In: International Cosmic Ray Conference, 16th, Kyoto, Japan, August 6-18, 1979, Conference Papers. Volume 4. (A81-12386 02-93) T

Other

Cosmic Rays, Geomagnetism, Heao 3, Satellite Observation, Azimuth, Magnetic Rigidity, Shadows, Zenith

Scientific paper

The complete description of the cosmic-ray cutoffs for a satellite in earth orbit requires more information than the simple vertical cutoffs which have been successfully used to order cosmic-ray measurements made in the earth's atmosphere or on the surface. Preliminary analysis of cutoffs obtained for an orbit of altitude 400 km, using 67 directions computed for a coarse world wide grid of points at 30 deg longitude intervals and 10 deg latitude intervals between 40 deg N and 40 deg S shows: (1) the shadow created by the solid earth blocks out a rigidity-dependent significant solid angle of otherwise allowed directions in the geomagnetic east; (2) the effect of the shadow cone is strongly dependent on altitude; and (3) at 400 km zenith angles as low as 58 deg can be affected.

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