Development of RASS system for atmospheric temperature sounding

本项目的目标是研制一套可连续工作、常规精度较高的高功率声源雷达雷达对流层和平流层低层大气温度测量系统。研制了一种与雷达数据处理系统直接相连的、带有RASS控制PC的声源跟踪控制系统。开发了先进的射线追踪和观测控制软件。利用观察室声源的无线电波传输，实现了一个非常稳定的声源控制系统。通过该系统，完成了从雷达观察室控制的全同步声阵列。该系统能够在夏季观测到对流层顶，在冬季观测到对流层中。利用先进的雷达系统和探空仪，对大气稳定性、雷达回波强度和能量耗散率进行了详细的研究，并研究了相关关系和相互关系。通过分析雷达回波强度和RASS测量的大气稳定性，发展了大气湿度剖面技术。因此，该项目的成果超出了最初的预期，并在国内外会议和期刊上发表。

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.