Development of RASS system for atmospheric temperature sounding

本项目的目标是研制一套用于测量对流层和平流层低层大气温度的RASS探测系统，该系统将使用高功率声波波源连接到MU雷达上，该系统可以连续、常规地工作，并具有良好的精度。开发了声光跟踪和观测控制软件，利用观测室的声波波源的无线电波传输，实现了一个非常稳定的声波源系统，可以控制各种波源。通过该系统，实现了雷达观测室控制的全同步声阵。该系统可以在夏季观测到对流层顶，冬季可以观测到对流层中层。通过利用研制的系统和探空仪进行的RASS观测，研究了大气稳定度、雷达回波强度和任意能量耗散率之间的关系和相互关系。通过对雷达回波强度和大气稳定度的分析，发展了大气湿度廓线技术。因此，本项目的成果超出了最初的预期，已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.