论文部分内容阅读
人造地球卫星是目前发射数量和种类最多、用途最广、效益最高的航天器。从1970年4月24日发射第1颗人造地球卫星东方红-1升空到现在,我国现已先后独自研制、发射和应用了试验卫星、科学卫星和应用卫星,取得巨大成果。一马当先的试验卫星我国航天初期发射过多颗“实践”系列试验卫星。2012年发射的实践-9A、9B是我国民用新技术试验卫星系列的首批星,主要用于卫星长寿命、高可靠、
Man-made earth satellites are currently the largest number and type of launch, the most widely used and most cost-effective spacecraft. From April 24, 1970 launch of the first man-made earth satellite Dongfanghong-1 so far, our country has successively developed, launched and applied the experimental satellite, the scientific satellite and the application of satellites, and achieved great results. The first experimental satellite China launched a number of early aerospace “practice ” series of test satellites. The launching practice in 2012 -9A, 9B is the first batch of China’s civil new technology pilot satellite series, mainly used for satellite long life, high reliability,