The almanac data in GPS navigation message is used by the user of GPS to calculate and forecast the visibility of navigation satellites.
GPS用户利用导航电文中的历书数据进行卫星可见性的计算和预报。
The almanac data in GPS navigation message is used by the user of GPS to calculate and forecast the visibility of navigation satellites.
GPS用户利用导航电文中的历书数据进行卫星可见性的计算和预报。
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