• 1. drag perturbation: 阻力扰动
• 2. atmospheric drag perturbation: 大气阻力摄动
• 3. air drag perturbation: 大气阻力摄动

• 1.The variation equation of the satellite orbit elements under both J2 and drag perturbations was derived based on the Gauss perturbation equation.
  基于高斯摄动方程，推导了卫星在同时考虑J2和大气摄动情况下的轨道根数变化方程。
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• 2.On the basis of the principle of atmospheric drag perturbation this paper describes two methods: numerical method and combining both of analytical and numerical method.
  根据大气阻力摄动的基本原理，给出两种摄动计算方法，即半分析半数伍方法和数值积分方法。
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• 3.Atmospheric drag is the main perturbation force on a low earth orbit satellite and is closely related to the variation of high atmospheric density.
  大气阻力是低轨卫星主要的摄动力，与高层大气密度的变化密切相关。
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