物理
带电粒子
维纳斯
磁强计
火星探测计划
电子
航天器
磁层粒子运动
行星表面
磁场
反射(计算机编程)
计算物理学
天体生物学
天文
离子
量子力学
计算机科学
程序设计语言
作者
K. A. Anderson,R. P. Lin,R. E. McGuire,J. E. McCoy
出处
期刊:Space Science Instrumentation
日期:1975-11-01
卷期号:1: 439-470
被引量:20
摘要
The paper describes the technique of planetary electron reflection magnetometry (PERM), a method for measuring the magnitude, direction, and scale size of magnetic fields near the surface of the moon and other planetary bodies with weak and small-scale-size surface fields. It is noted that the PERM technique is based on the ability of magnetic fields to reflect charged particles. A qualitative account of the implementation of the technique is presented along with some results obtained by the Apollo 15 and 16 Particles and Fields subsatellites. The quantitative aspects of PERM are treated by examining solutions to the equation of motion of a charged particle in a magnetic field, computing reflection coefficients on the basis of trajectory calculations, and determining the direction of the lunar surface magnetic field. The sensitivity of the PERM technique is calculated, and effects of lunar electric fields and spacecraft potentials on the measurements are described. Extension of the technique to Mars and Venus is discussed.
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