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说起定位、导航,人们并不陌生。大家知道,许多动物都有着神奇的迁徙本能,我们常常为它们在长途跋涉中表现出来的、近乎完美的导航本领而赞叹不已,同时也梦想着自己具有这样的能力,并为实现这一梦想而不懈地努力着:从我国发明的第一种定向工具“指南车”开始,人类随后相继发明了磁罗盘、六分仪、无线电定位导航系统和惯性导航系统等。然而,这些导航系统仍然不能完全满足人类的需要。今天,由于卫星定位、导航技术的出现,使得这一技术发生了质的飞跃。美国历经20年的开发,于1994年部署完毕的“全球定位系统”(GPS),正是这一领域中的杰出之作,也使它成为继“阿波罗”登月飞船和航天飞机成功发射以后美国的第三大航天工程。
Speaking of positioning, navigation, people are no stranger. We all know that many animals have magical migratory instincts, and we often marvell at the near-perfect navigation they have shown during their long journey, dreaming of their own ability to do that, Unremitting efforts: From China's invention of the first directional tool “guide car ” began, humans have subsequently invented the magnetic compass, sextant, radio positioning navigation system and inertial navigation system. However, these navigation systems still can not fully meet the needs of mankind. Today, due to satellite positioning, navigation technology, making this technology has undergone a qualitative leap. After 20 years of development, the United States deployed “GPS” in 1994, which is an outstanding achievement in this field. It has also made it the next “Apollo” moon landing spacecraft and The third largest aerospace project in the United States after the space shuttle was successfully launched.