In this paper conditions for such a kind of orbits, the minimum altitudevariation orbits, are derived and related parameters are given.
本文推导了这种最小高度变化轨道的条件，并给出了相应的参数。
2
The mechanical analysis and the trimming were performed for a novel near space aircraft which uses the variation in wind speed at high altitude to control its flight path.
对一种利用高空风的风速差控制飞行轨迹的新型低能耗临近空间飞行器，进行了力学分析与配平计算。
3
The analysis has shown that the geographical variation trend of phenotypic traits has given priority to longitude, and no obvious variation in latitude and altitude.