遥测是卫星、飞船和运载火箭等航天器系统的关键功能之一.随着航天器功能、性能的提高和系统规模、技术复杂性的增大,对遥测的要求在不断提高;由于航天器功耗、重量、天地通信带宽或中继业务费用等约束限制,传统PCM遥测技术和分包遥测技术难以满足当前要求;在分析遥测数据信息冗余度的基础上,提出一种实时在线遥测信源压缩方案,以高性能数据处理计算机为核心完成信源数据搜集和组帧,然后在时间和空间维度进行压缩编码,最后按照兼容CCSDS分包遥测的标准进行分段处理、信道编码和遥测下行,该方案兼容CCSDS技术标准,信道利用效率高、压缩后的信息冗余度低,应用构建费用低、接口简单和可扩充性好.%This paper presents a method to simplify source application processes, reduce cost of telemetry system, increase spacecraft autonomy and channel utilization ratio, which is compatible to CCSDS in the same time. Basing on the seven layer architecture of Packet Telemetry of the CCDS, this method limits source application processes to some specified period, performs data grouping and compression and repacketization in packetization layer.
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