1·Space Fence will replace the current VHF Air Force Space Surveillance System built in 1961.
太空护栏将取代目前建于1961年的甚高频空军空间监测系统。
2·Expected to begin initial operation in 2015, the system will replace the existing Air Force Space Surveillance system, or VHF Fence, which has been in service since the early 1960s.
预计该系统将于2015年投入首次运行，届时将替代美国空军的现有太空监视系统或‘甚高频篱笆’——自从20世纪60年代初期就开始服役。
3·Apart from channel two, the rest of the original VHF channels on the dial were usually just the odd Numbers from three to 13.
除了2频道之外，原来位于频道调节器甚高频段的其余频道序号，通常只是3到13间的奇数。
4·Now maritime communications systems primarily include satellite communications, single side band, VHF (VHF).
现在海上通信系统主要有卫星通信、单边带、甚高频(VHF)。
5·The reference stations have such functions as positioning, VHF electric wave transmit, calculate average value, etc.
系统的参考站具有定位、甚高频电波发射、平均位置等功能；