W hen the Earth moves from perihelion to aphelion, its radiation belts are expansion, and aphelion to perihelion contraction.

当地球从远日点运动到近日点时，地球辐射带向内收缩。

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These devices are used in satellites that orbit the Earth within the Van Allen radiation Belts and must be able to work in a continuous low-radiation environment.

这些装置用于在“范·艾伦辐射带”内沿一定轨道绕地球运行的卫星上，它们必须能在持续低辐射的环境中正常工作。

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By interplanetary space, we are talking about an environment in which space radiation is much more intense than it is in LEO, because above Earth orbit is the geomagnetosphere, the Van Allen belts, which trap charged particle radiation coming from deep space.

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