Development of RASS system for atmospheric temperature sounding

本项目的目标是研制一种用于测量对流层和平流层低层大气温度的RASS探测系统，该系统可安装在MU雷达上，使用高功率声波源，可连续、常规地工作，具有良好的精度。它直接连接到雷达数据处理系统。开发了先进的射线追踪和观测控制软件，利用观测室的声波源的无线电波传输，实现了对各种波源进行控制的非常稳定的声波源系统。通过该系统，实现了从雷达观测室控制的全同步声基阵。该系统在夏季可观测到对流层顶，在冬季可观测到对流层中层。利用该系统和探空仪对大气稳定度、雷达回波强度和能量耗散率进行了详细的研究，并研究了它们之间的相关性和相互关系。通过分析雷达回波强度和大气稳定度，发展了大气湿度廓线技术。因此，本课题的研究成果已在国内外学术会议和期刊上发表，超过了最初的预期。

The goal of this project is to develop a RASS sounding system for atmospheric temperature measurement for the troposphere and the lower stratosphere to be attached to the MU radar using high power acoustic wave source, which can be operated continuously, routinely with a good precision.A system with a RASS control PC for ray tracing and control of acoustic wave sources, which is directly connected to the radar data processing system has been developed. Sophisticared ray tracing and observation control softwares have been developed.Using radio wave transmission of acoustic wave source from the observation room, a very stable system for acoustic wave source with a control of various wave sources has been realized. Through such system, acoustic array with full synchronization controlled from the radar observation room has been completed. This system enabled to observed up to tropopause in summer and mid-troposphere in winter.From the RASS observation with the developed system and radiosondes, atmospheric stability, radar echo intensity any energy dissipation rate have been closely studied and the correlations and interrelationship have been studied.Profiling technique of atmospheric humidity has also been developed by analyzing radar echo intensity and atmospheric stability from RASS measurement.Thus, the achivements of this project are more than the initial expectation, which have been published in domestic and international conferences and in journals.