unmanned spacecraft

基本解释

We introduce in this paper the Scatterometer mode of Multimode Microwave Sensors on board Chinese Shenzhou-4 unmanned spacecraft launched on Dec. 29, 2002.
介绍神舟4号多模态微波遥感器散射计分系统的研制情况和在轨实验情况。
High Alphabet modulation is a new modulation method, which is very suitable for safety remote control aboard missile, launch vehicle, manned or unmanned spacecraft, etc.
主字母调制技术是一种新颖的调制方式，非常适合于导弹、运载火箭以及载人和不载人飞船的安全遥控。
The Goddard center is home to the nation’s largest organization of scientists, engineers and technologists, and is a major U.S. laboratory for developing and operating unmanned scientific spacecraft.
Goddard中心是美国最大的科学家、工程师和技术人员的组织，并且是美国主要的科研开发和经营无人驾驶航天器的实验室。
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They came down near Surveyor Three, an unmanned spacecraft that had landed on the moon two years before.
Other projects include sending unmanned spacecraft to Europa, an icy moon of the planet Jupiter.
It thundered into space perfectly, pushing an unmanned Apollo spacecraft more than eighteen thousand kilometers up into the atmosphere.

Several visiting unmanned spacecraft are expected to deliver supplies to the space station during Expedition 32.
MSN: Space station crew launches into orbit on Russian craft