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!
根据对船位线交角的最低要求，论述了在太阳移线定位中，以中天纬度线为参考，进一步安排中天附近以外观测太阳船位线所需时间间隔的估算。
According to the angle requirement for two ships position lines, this paper proposes the method to arrange the time to take the sun sight further than the one near the noon sight.
根据对船位线交角的最低要求，论述了在太阳移线定位中，以中天纬度线为参考，进一步安排中天附近以外观测太阳船位线所需时间间隔的估算。
According to the angle requirement for two ships position lines, this paper proposes the method to arrange the time to take the sun sight further than the one near the noon sight.
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