1　“8 X”卫星□□美国在认真总结原有照相侦察卫星系统在海湾、波黑等战争使用过程中存在的问题后 ,对其采取了重大技术改进措施。由于原有系统观测幅宽太窄 ,侦察时犹如“用麦管观测地球”,所以空间分辨率再高也难以满足战场或战区应用需求 ,实战应用效果较差。时间分辨率低 1 “8 X” Satellites -The United States has taken major technical improvements to the United States after earnestly reviewing the problems existing in the use of the original Photographic Reconnaissance Satellite System in the Gulf and Bosnia and Herzegovina. As the original system observation width is too narrow, reconnaissance as if “with the straw to observe the Earth”, so the high spatial resolution is also difficult to meet the battlefield or theater applications, the actual application is less effective. Low temporal resolution