由于冷战的缘故,苏联对照相侦察卫星的研制极为重视,致使它成为苏联航天计划中规模最大、数量最多的单项计划,其中早期的为“天顶”系列照相侦察卫星,后来又研制了“琥珀”等系列照相侦察卫星。由于保密的关系,有关“天顶”系列照相侦察卫星的介绍也是五花八门,其中不少是由美国出版的书刊披露的,说法多多,只能作为参考。 As a result of the Cold War, the Soviet Union paid great attention to the development of a photographic reconnaissance satellite, which led it to become the largest and most numerous single project in the Soviet space program. In the early years, it was the “Zenith” series of photographic reconnaissance satellites and later developed “Amber ” series of photo reconnaissance satellites. Due to the confidential relationship, the introduction of the “Zenith” series of photographic reconnaissance satellites is also varied. Many of them are disclosed by books and periodicals published by the United States. There are many explanations that can only be used as a reference.