Smart D F, Shea M A
Air Force Geophysics Laboratory, Hanscom AFB, Bedford, MA 01731, USA.
Adv Space Res. 1984;4(10):161-4. doi: 10.1016/0273-1177(84)90238-2.
The allowed cosmic radiation flux accessible to an earth-orbiting spacecraft is a complex function of the satellite position and the geomagnetic cutoff characteristics at each zenith and azimuth angle at each position. We have determined cosmic ray exposure factors for the galactic cosmic ray spectrum for typical shuttle altitudes and inclinations up to 50 degrees. We have utilized d world grid of trajectory-derived cutoff rigidity calculations at 400 km altitude to determine geomagnetic transmission functions that permit a simple and direct calculation of the allowed cosmic ray spectrum to a 400 km satellite orbit. If the interplanetary cosmic ray spectrum is multiplied by the orbit-averaged geomagnetic transmission function the result is the allowed cosmic ray spectrum at the spacecraft.
对于地球轨道航天器而言，可接触到的允许宇宙辐射通量是卫星位置以及每个位置上每个天顶角和方位角处地磁截止特性的复杂函数。我们已经确定了典型航天飞机高度和高达50度倾角下银河宇宙射线谱的宇宙射线暴露因子。我们利用在400公里高度处基于轨道推导的截止刚度计算的全球网格来确定地磁传输函数，该函数允许简单直接地计算到400公里卫星轨道的允许宇宙射线谱。如果将行星际宇宙射线谱乘以轨道平均地磁传输函数，结果就是航天器处的允许宇宙射线谱。
