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《中国工程科学》 >> 2020年 第22卷 第2期 doi: 10.15302/J-SSCAE-2020.02.019

天基信息实时智能服务系统仿真评估研究

1. 地球空间信息技术协同创新中心,武汉 430079;

2. 武汉大学电子信息学院,武汉 430072;

3. 武汉大学测绘遥感信息工程国家重点实验室,武汉 430079

资助项目 :中国工程院咨询项目“天基信息实时服务系统( PNTRC)发展战略研究” (2017-ZD-01) 收稿日期: 2019-12-04 修回日期: 2020-02-28 发布日期: 2020-04-01

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摘要

天基信息实时智能服务系统(PNTRC)是多星协同、多网互联的下一代天基信息系统,将广泛应用在卫星通信、导航、遥感等领域。本文针对 PNTRC 建模仿真和效能评估展开研究,分析了系统评估仿真的必要性、需求以及发展趋势,进而支撑PNTRC顶层设计和实施方案论证。针对 PNTRC 动态时变、业务多样、异质异构的特性,对场景可扩展的高效分布式仿真、时空动态分析评估方法、系统体系化建模等关键技术展开详细讨论。基于分布式仿真评估系统,以高分辨率对地遥感业务为例,对比和评估了多个低轨通信星座对遥感业务的传输支持能力。研究结果表明,在遥感业务数据传输过程中,覆盖密集的OneWeb 星座卫星具有更小的网络时延、丢包以及更高的容量和稳定性,但单星容量反而不及覆盖密度较小的“虹云”“鸿雁”星座。本文研究为我国PNTRC可行性论证与工程建设提供了方法和技术手段支撑。

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