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Relative navigation traditionally using inter-satellite links demands higher inter-satellite time synchronization, and has no ability of absolute positioning and timing. In this paper, we propose a relative navigation model of X-ray pulsar-based co-localization. The main satellite receives the radiation pulse signal from X-ray pulsars, and sends the arrival time and individual pulse's feature to adjacent satellites through inter-satellite links. Then by detecting the inter-satellite time difference of X-ray pulsar signals we can establish the location equation to find the inter-satellite relative position. We deduce the error correction equation of the pulse TOA prediction model and analyze the identifiability of individual pulses of the pulsar. The method proposed in this paper is less influenced by the TOA prediction model, ephemeris error, etc. It is helpful for achieving on-line self-adaption correction of the TOA prediction model and combined orbit determination of satellite constellation. 相似文献
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通过参与南水北调中线一期工程土石方平衡施工,发现在工程设计、实施过程中存在诸多问题,从实际问题入手,分析出现问题的主要原因和可能出现问题的关键环节,并给出相应对策。 相似文献
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基于DSP/FPGA的嵌入式实时目标跟踪系统 总被引:1,自引:1,他引:1
提出了一套基于DSP/FPGA的协处理器结构用以实现实时目标跟踪的嵌入式视觉系统。系统由DSP作为主处理器进行全局控制,利用具有流水线并行处理结构的FPGA作为协处理器实时完成DSP分配的处理任务。系统由FPGA快速完成最初的运动估计的结果,DSP在此基础上进一步分析和校正,并将校正信息反馈给FPGA,实现快速而准确的跟踪。 相似文献
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滹沱河综合整治工程作为石家庄市“三年大变样”的重点工程,是提升城市品位、拓展城市空间和建设幸福石家庄的重要举措。经过对滹沱河的整治,建成了集防洪、观赏和游玩为一体的综合性大型生态风景区。水是滹沱河景区存在的最基本的自然资源条件,而文化是景区发展的重要人文资源。 相似文献