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月球激光测距
释义
月球激光测距
Encyclopedia
理学
激光测卫
释
Lunar Laser Ranging
月球激光测距
地面测站上的发射望远镜向月球发射脉冲激光,经过月球表面上的光学四面体棱镜即后向反射器的反射,激光回波沿原路径返回到达地面上的接收望远镜,通过测定激光往返所需的时间,乘以光速便得到地月之间的距离的技术。简称LLR。
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thread whirling
thready pulse
threat
threat analysis
threat assessment
threatened abortion
threatened animals in China
threatened plant
threatened preterm labor
threatened species
threat estimation
threat identification
threat monitoring
threat of coalitions
threats to biodiversity
threat strategy
Three
three accesses & two platforms
three affliction
Three-Age System
Three Antis Movement and Five Antis Movement
three-arc illusion
three-area nine-region pulse-taking method
three awards and one subsidy
three-axial ellipsoid
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