论文部分内容阅读
美空军于1989年9月4日用大力神-3运载火箭进行了第141次发射,把一颗秘密军用卫星送入地球轨道获得成功。大力神-3运载火箭自从1964年以来25年间已经发射了200个以上人造地球卫星和行星探测器。美空军从1989年6月开始启用新型大力神-4运载火箭发射卫星。大力神-3运载火箭这次发射是最后一次发射。大力神-3运载火箭在1989年8月还被用于发射
The U.S. Air Force conducted the 141st launch on 9 September 1989 with the Hercules-3 launch vehicle and successfully launched a clandestine military satellite into orbit. The Hercules-3 launch vehicle has launched more than 200 artificial Earths satellites and planetary probes in the 25 years since 1964. The U.S. Air Force started the launch of the new Hercules-4 launch vehicle in June 1989. Hercules -3 carrier rocket this launch is the last launch. Hercules-3 launch vehicle was also used for launch in August 1989