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One-way laser ranging technology is applied for the precise orbit determination of LRO, which is the first trial for supporting the missions of lunar or planetary spacecraft. In this paper, LRO payload and ground system are discussed for LRO laser ranging, and some errors effecting on time of flight and tracking mount accuracy are analyzed. Additionally several technologies are also analyzed to make laser pulses shot from ground stations to arrive in the LRO earth window. Measurement data of LRO laser ranging verified that these technologies could be implemented for one-way laser ranging of lunar spacecraft.   NASA  LRO             ,           .   LRO         ,        . ,     earth window    .     LRO                  . Key Words : Laser Ranging( ), Lunar Reconnaissance Orbiter( ), Lunar Orbiter Laser Altimeter(   ), Satellite Laser Ranging( ), Precise Orbit Determination()

Laser Ranging for Lunnar Reconnaissance Orbiter using NGSLR