GPS全称“全球定位系统”,是美军高技术兵器得以发挥作用的关键设备,它的发展也一直受到美军的高度关注。在2003年的伊拉克战争中,这种系统以及在这种系统支持下的武器装备出尽风头,但美军在获胜的同时,也发现这种系统存在缺陷,仍需进一步改进。 GPS现已发展到第二代,原来的规范要求军用三维定位精度达到16米,民用 The full name of GPS, the “Global Positioning System,” is a key device for the U.S. military’s high-tech weapons to play its role. Its development has also been drawing great attention from the U.S. military. During the 2003 Iraq war, such a system and the weapons and equipment supported by such a system took the limelight. However, while winning the victory, the U.S. military also found that such a system is flawed and needs further improvement. GPS has now developed to the second generation, the original specification requires military three-dimensional positioning accuracy of 16 meters, civilian