该系统需要18颗卫星才能覆盖俄罗斯全境，需要24颗卫星才能实现精确的全球导航。
However, the system requires 18 satellites to cover Russia; and 24 dependable satellites operating round the clock are needed for accurate global navigation.
GPS折射角资料具有分辨率高、全天候探测、覆盖全球等优点，实现对GPS折射角资料的变分同化，将具有非常重要的意义。
There are many advantages of the GPS bending Angle, such as high resolution, availability in all weather conditions, and global data coverage.
为了提高移动通信系统的容量和效率、实现全球无缝覆盖，必须实现低轨卫星移动通信系统与地面通信系统之间的有机综合。
It is necessary to integrate the LEO satellite communication systems and terrestrial mobile communication systems for improving the capacity and efficiency, achieving global seamless coverage.
铱星公司雄心勃勃的计划是通过66颗低轨卫星覆盖全球实现全球自由通信。
The firm's ambitious plan was for mobile phones which work anywhere in the world thanks to its network of 66 low orbiting satellites.
铱星公司雄心勃勃的计划是通过66颗低轨卫星覆盖全球实现全球自由通信。
The firm's ambitious plan was for mobile phones which work anywhere in the world thanks to its network of 66 low orbiting satellites.
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