1990～2002年世界商业卫星每年发射15～25颗。这些卫星中通信卫星占70％、科学卫星占15％和观测卫星占15％。目前世界各国有32家卫星经营者,计有98颗需发射的实用通信卫星:欧洲23颗,美国28颗,其他国家25颗,国际卫星组织22颗。阿里安公司要发射其中的40颗。未来通信卫星与目前的有所不同,最大的不同是:卫星寿命从10～ From 1990 to 2002, the world’s commercial satellites launched 15 ~ 25 stars annually. Among these satellites are communications satellites 70%, science satellites 15% and observing satellites 15%. At present, there are 32 satellite operators in all countries in the world, accounting for 98 practical communications satellites to be launched: 23 in Europe, 28 in the United States, 25 in other countries and 22 in international satellites. Arian company to launch one of 40. Future communication satellites are different from the current one, the biggest difference is: satellite life expectancy from 10 ~