针对空天防御作战问题,研究探讨了空天防御的空间信息系统构架及关键技术。结合空天防御的空天信息需求,给出了空间信息网格环境下的空天防御信息保障系统构架,探讨了实现空天防御信息保障的关键技术,实现网格环境下的空天信息实时获取和按需分发,为作战单元提供高效、稳定的信息服务,确保信息保障的实时性和服务质量。 Aiming at the problem of space-day defensive operations, this paper studies and discusses the spatial information system framework and key technologies of air-to-sky defenses. In the light of the space-day information requirements of air defense, the framework of air-space defense information assurance system in space information grid environment is given. The key technologies of air-space defense information assurance are discussed. Real-time air-space information in grid environment Acquire and distribute on demand, provide efficient and stable information services for combat units and ensure the real-time performance and service quality of information assurance.