Space Environment Effects: Low-Altitude Trapped Radiation Model

Details Space Environment Effects: Low-Altitude Trapped Radiation Model Space Environment Effects: Low-Altitude Trapped Radiation Model

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998seel.book.....h&link_type=abstract

Space environment effects : low-altitude trapped radiation model / S.L. Huston and K.A. Pfitzer. MSFC, Ala. : Marshall Space Fli

Astronomy and Astrophysics

Astronomy

8

Aerospace Environments, Ionizing Radiation, Extraterrestrial Radiation, Environment Models, Trapped Particles, Proton Flux Density, Secular Variations, Noaa Satellites, Background Radiation, Radiation Dosage, Radiation Trapping, Solar Cycles, Low Altitude, Environment Effects

Scientific paper

Accurate models of the Earth's trapped energetic proton environment are required for both piloted and robotic space missions. For piloted missions, the concern is mainly total dose to the astronauts, particularly in long-duration missions and during extravehicular activity (EVA). As astronomical and remote-sensing detectors become more sensitive, the proton flux can induce unwanted backgrounds in these instruments. Due to this unwanted background, the following description details the development of a new model for the low-trapped proton environment. The model is based on nearly 20 years of data from the TIRO/NOAA weather satellites. The model, which has been designated NOAAPRO (for NOAA protons), predicts the integral omnidirectional proton flux in three energy ranges: >16, >36, and >80 MeV. It contains a true solar cycle variation and accounts for the secular variation in the Earth's magnetic field. It also extends to lower values of the magnetic L parameter than does AP8. Thus, the model addresses the major shortcomings of AP8.

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