星载太赫兹冰云探测技术发展和面临问题

Discussion of spaceborne Terahertz active Cloud Profiling Radar

摘要:

当前云遥感手段对于短期天气预报和长期气候研究起到举足轻重的作用，但是在云遥感方面探测能力存在一定的不足。简单比较了当前云遥感手段的优点和缺点，重点分析了星载微波云雷达发展现状。通过分析比较认为星载微波云雷达向高灵敏探测度、多功能、多频和高频方向发展。太赫兹波在高空衰减较小且对微小云粒子探测较为敏感，因而适合于星载平台，这将使其成为今后星载云雷达重要发展技术。最后，基于气象探测需求和太赫兹技术特点，提出了一种星载太赫兹主动云雷达系统方案。

Abstract:

Remote sensing techniques have been improved in the representation of cloud processes in Global Climate(GCM) and Numerical Weather Prediction(NWP) models, nevertheless, there are still gaps in our ability to probe clouds. This paper concludes the advantages and disadvantages about remote sensing tools, especially microwave Cloud Profiling Radar(CPR). There are four trends of microwave cloud radar development: higher sensitivity, multifunction, multi-frequency and higher frequency. The terahertz wave followed in atmospheric window will be absorbed slightly and it is suitable for spaceborne platform. A scheme is proposed for spaceborne terahertz active CPR.