从1991年11月欧洲航天部长会议确定大型航天发展计划以来,欧洲航天业发生了一些明显变化。尽管欧洲人雄心勃勃,誓走独立自主的航天道路,但由于欧空局某些成员国陷入经济危机,不得不再三压缩对航天的巨额投入。另外,鉴于美国和前苏联的庞大计划,加之世界政局的变化,欧洲人对独立实施其大型航天 Since the European Space Minister's Conference in November 1991 identified a major space development plan, some significant changes have taken place in the European space industry. Despite the ambitious ambitions of Europeans to go on an independent space route, the huge investment in space has to be squeezed again due to the economic crisis in some ESA member countries. In addition, in view of the huge plans of the United States and the former Soviet Union, combined with changes in the political situation in the world, Europeans independently implement their large space