摘要
风廓线雷达是一种以大气湍流为主要探测对象的晴空测风雷达。近年来,风廓线雷达得到普遍使用,其资料的应用也在逐步扩展,对雷达产品精度越来越高,由于以测风为主要目的设计的风廓线雷达在前期设计中没有充分考虑回波强度信息的定量测量,导致数据越来越难满足需求,主要原因就是平均噪声功率的精确估测。文章根据风廓线雷达信号现行处理流程与方法,在做一定合理假设基础上,得到了平均噪声功率谱的概率分布,并利用北京延庆风廓线雷达实测数据对噪声模型进行验证,结果与理论模型较吻合。
Wind profiler is a kind of clear air radar, which takes atmospheric turbulence as main detecting object. In recent years, the wind profile radar is widely used. The application of the radar data is also gradually expanded that needs data precision higher and higher. With the wind as the main design of the wind profile radar in the early stage is not fully considering the intensity information of quantitative measurement, because the data cannot meet the demand. The main reason is that the average noise power is not accurate estimated. Based on current process and method for the wind profile radar signal, by means of some reasonable assumptions, this paper obtains the probability distribution of the average noise power spectrum,and uses the data measured by Beijing Yanqing wind profile radar to validate the noise model. Theoretical results fit well with theoretical model.
出处
《气象水文海洋仪器》
2015年第2期1-4,共4页
Meteorological,Hydrological and Marine Instruments
关键词
风廓线雷达
平均噪声功率
统计分析
概率分布
wind profile radar
average noise power
statistical analysis
probability distribution
