subpoint 中文意思是什麼
subpoint
解釋
投影點-
The distinct trait of sun synchronic orbit satellite is that there will be the same sun conditions in the subpoint of the satellite wherever the satellite is, it benefits the earth reference equipments. and the regressive orbit satellitr ' s trait is that the satellite can cover the earth periodic, it benefits the dynamic reconnaissance. because of these merits, the sun synchronic and regressive orbit become one of the most popular orbit types
太陽同步軌道的主要特點是衛星在任一時刻其星下點的陽光條件基本相同，這對衛星上對地儀器的工作是非常有利的。而回歸軌道的特點是周期性地覆蓋地球，這有利於對地球上動態目標的偵察。由於以上的優點，太陽同步回歸軌道成了所有衛星軌道中最常見的軌道之一。
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