空天地一体化对地观测网不仅是最具发展前途的高新技术领域之一,也是保障国家安全、经济社会发展的重要基础设施。本文首先全面论述了对地观测网研究的主要理论问题、关键技术、发展现状和趋势;然后,介绍了国产卫星遥感数据的一体化综合快速处理技术,在此基础上论述了广义空间信息网格的概念和内涵;最后指出,需以提供快速、精确和实时的空间信息服务为目标,加快开展对地观测网的理论与技术研究,推进数字地球走向智慧地球的转变。

Space-Air-Ground integrated earth observation network (SAGIEON) is not only the most promising high-tech area, but also a fundamental infrastructure closely related to national security and economic/social development. Firstly, the scientific concept, key technologies, current situation and tendency of SAGIEON are comprehensively represented. Secondly, an integrated data processing system for native remote sensing satellites is introduced, including its objectives and key technologies. Thirdly, the connotation of generalized spatial information grid are proposed on the basis of the above mentioned discussions. Finally, some conclusions are drawn. For the propose of providing fast, precise and real-time spatial information service to everyone, it is very important to carry out research on the theories and technologies of SAGIEON.