遥感卫星高速数传信息流设计

High-rate Data Transmission Stream Design for Remote Sensing Satellite

随着卫星遥感技术水平的提高,遥感数据的类型和数据量快速增加。为适应多类型、高速率遥感数据传输的复杂需求,对数传信息流进行了顶层设计,定义了数传与遥感系统数据接口以及数传帧格式,对遥感数据传输所需码速率进行了分类计算,为设计固定的下行数传码速率提供了依据。进而针对不同类型的遥感数据提出了基于分组优先级虚拟信道动态调度策略的数传信息流设计方案,确保不同类型遥感数据的传输满足不同的应用需求。对高速遥感数据确保满足较低的缓存容量需求,对低速遥感数据确保满足实时性传输需求。采用动态仿真技术对数传信息流设计方案进行了试验验证。设计方案可为后续新一代遥感卫星数传系统设计提供参考。

With the development of satellite remote sensing technology,type and amount of remote sensing data are increasing rapidly.In order to meet the complex needs of multi-type data and high rate remote sensing data transmission,a top-level design of the data transmission stream was presented,and both remote sensing/data transmission system data interface and data transmission frame format were defined,then a classified calculation of transmission rate required for remote sensing data transmission was put forward to provide a prerequisite for the design of a fixed down-link data transmission rate.Then a data transmission stream design was proposed based on the virtual channel dynamic scheduling with subgroup priority to ensure that the transmission of different types of remote sensing data meet the requirements of different applications,in which the high-speed remote sensing data was processed with small cache capacity requirements while the low speed one was done to satisfy the real-time transmission demand.Dynamic simulation results demonstrate the correctness of the proposed scheme.The suggested approaches have a reference for design of the follow-up new generation remote sensing satellite data transmission system.