“天问一号”地面应用系统有效载荷数据预处理系统总体设计与关键技术
System Design and Key Technologies of Data Preprocessing System for “Tianwen-1” Ground Application System

“天问一号”为我国首次火星探测任务，该任务是我国空间探测由近地走向深空的关键转折，决定着我国是否能够跻身具备深空探测能力的国家行列。“天问一号”地面应用系统有效载荷数据预处理系统(下文简称“数据预处理系统”)为该任务中的重要一环。本文从系统设计角度，详细介绍了数据预处理系统的任务、架构、业务流程及系统组成等内容，并讨论了该系统采用的关键技术，包括火星地球超远距离传输造成信噪比较低情况下的数据解析技术、多接收站大数据量激增情况下的高效数据处理技术、多载荷多模式的数据自动化处理技术等，并针对在轨运行情况，在效率、资源利用、数据正确性等方面对系统进行了综合评估。
“Tianwen-1” is China’s first Mars exploration mission. This mission is a key turning point for China’s space exploration from near earth to deep space, and determines whether China can become one of the countries with deep space exploration capabilities. The data preprocessing system for “Tianwen-1” ground application system is an important part of this task. From the perspective of system design, this paper introduces the system architecture, business process and system compo-sition of the data preprocessing system in detail, and discusses the key technologies adopted by the system, including data processing technology in the case of low signal-to-noise ratio caused by Mars Earth ultra long distance transmission, efficient data processing technology in the case of large data surge in multiple receiving stations, multi-payloads multi-modes data automatic processing technology, etc. According to the operating conditions, the system is comprehensively evaluated in terms of efficiency, resource utilization and data correctness.