大多数情况下，人造卫星自观测者的西方升起，经过中天，然后在东方落下，虽然越极轨道人造卫星可以在天空的任意部分升起和落下！
In most cases, the satellite will rise in the west, cross the observer's meridian, and set in the east, although satellites in a polar orbit can rise or set in any part of the sky!
人造卫星能够利用遥感观测地球上的气候变化。
The satellites are able to observe the changes of climate on earth by means of remote sensors.
模拟是科学研究的常用方法之一，观测模拟对于天文观测与研究特别是对于人造卫星的观测与研究尤为重要。
Simulation is one of the most useful methods of scientific research. However, simulating observation is important for the astronomical observation and research, especially for the satellites.
人造卫星的精确轨道参数将由无线电和光学观测站测量得出。
Accurate measurement of the orbit parameters of the artificial satellite was provided by radio and optical stations.
人造卫星的观测显示，南极洲的冰层下面有很多活水湖，深达一公里。
Satellite measurements of the icy surface of Antarctica have detected an active system of lakes under ice that is about one kilometer deep.
大部分进展是通过火箭和人造卫星所获得的观测资料和理论解释而取得的。
Much of this progress has resulted from observations made by rocket and satellite experiments and theoretical interpretations.
大部分进展是通过火箭和人造卫星所获得的观测资料和理论解释而取得的。
Much of this progress has resulted from observations made by rocket and satellite experiments and theoretical interpretations.
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