遥感卫星随遇接入互联网星座和在轨智能处理  

Study on remote sensing satellites random access to internet constellation and on-orbit intelligent processing

作　　者：常晓宇 张伟嘉 李旭东[1] 张晓男 王港 贾钢[1] CHANG Xiaoyu;ZHANG Weijia;LI Xudong;ZHANG Xiaonan;WANG Gang;JIA Gang(The 54th Research Institution of CETC,Shijiazhuang 050081,China;CETC Key Laboratory of Aerospace Information)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]中国电子科技集团公司航天信息应用技术重点实验室,河北石家庄050081

出　　处：《电信科学》2022年第4期59-69,共11页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.U20B2064)。

摘　　要：低轨互联网星座是当前全球研究和发展的热点,互联网星座支持随遇接入遥感卫星和信息在轨直接处理的应用前景备受期待,但由于轨道高度不同会产生双向高动态异构星座的接入互联问题。首先,通过设定低轨卫星互联网星座在不同轨道特性、不同卫星数量情况下的随遇接入仿真场景,重点探讨了时空非连续可视性和多普勒频移问题对遥感卫星接入性能的影响;其次,基于遥感卫星随遇接入互联网星座场景的特点,分析了不同时延性在轨处理任务的流程及其星地功能分配;最后,对当前在轨智能处理算法存在的问题和未来研究重点进行阐述,为未来低轨互联网星座及遥感卫星的发展和联合组网应用提供可靠的理论支撑。The low earth orbit(LEO)satellite Internet constellation is a hot spot in current global research.And it is highly anticipated that the LEO satellite Internet constellation supports random access to remote sensing satellites and direct on-orbit information processing.However,due to the different orbital heights,the difficult access problems of the bidirectional highly dynamic heterogeneous constellation will be caused.Firstly,the random access scenario under different orbit characteristics and satellite numbers of LEO satellite Internet constellation was set up,and the impact of the spatiotemporal discontinuous visibility and Doppler frequency shift on the remote sensing satellite access performance was focused on.Secondly,based on the characteristics of the random access scenario,the process of on-orbit processing tasks with different delays and the allocation of satellite-ground functions were analyzed.Finally,the problems existing in the current on-orbit intelligent processing algorithm and the focus of future research were expounded,so as to provide reliable theoretical support for the development and applications of LEO satellite Internet constellation and remote sensing satellites in the future.

关 键 词：低轨卫星互联网星座 遥感卫星 随遇接入 非连续覆盖 在轨智能处理 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]