2010年10月1日，中国长征3号丙火箭准备发射中国第二颗探月卫星——嫦娥二号环月飞行器。
Chinese Long March 3C rocket stands poised to launch China's second moon mission, taching'e 2 lunar orbiter, on Oct. 1, 2010.
重点考察了月球重力场误差、观测量精度、初始时刻的先验轨道误差以及观测资料类型等对环月飞行器定轨精度的影响。
Especially, the effects of lunar gravity, observation accuracy, orbital error and observation data types on the orbital determination accuracy of the lunar orbiter have been carefully investigated.
该火箭将把这个飞行器送入环月轨道，此后该卫星有望于五天后抵达月球。
The rocket will shoot the craft into the trans-lunar orbit, after which the satellite is expected to reach the Moon in about five days.
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