摘要
高频地波雷达的"距离-多普勒"(Range-Doppler,R-D)数据与"恒虚警率"(Constant False-AlarmRate,CFAR)检测结果数据存在非直观性的问题,本文针对此问题,分析了地波雷达回波数据特点以及结果形式,研究了采用地理信息系统(Geographic Information System,GIS)技术对回波数据进行显示分析,对R-D与CFAR检测结果进行表达,实现高频数据在GIS环境下的表达处理与显示。本文采用GIS的栅格表达"距离-多普勒"数据,采用矢量数据结构表达CFAR检测结果,实现了地波雷达检测信息的直观显示;研究了高频地波雷达数据中特定距离一维谱信号的提取,实现了基于距离值的目标CFAR检测查询;针对雷达数据量大、处理时间长的问题,采用多线程处理机制实现了高效实时显示和分析。
The “range-doppler”（R-D） and constant-false-alarm-rate（CFAR） data of HF surface wave radar are digi-tal and non-imaging data. In this paper, the characteristics and output mode of HFSWR echo signal data were ana-lyzed and the ways of displaying echo signal data were studied based on GIS. The R-D and CFAR data were ana-lyzed and the expression processing and display of the high frequency signal in a GIS environment were success-fully achieved. In this paper, the raster GIS expression “distance-Doppler” data and the CFAR detection results ex-pressed by vector data structure, were used to achieve the query of distance value and CFAR detection goal. The R-D and CFAR data were presented through drawing one-dimensional doppler line. Because echo signal data is large and time is long, multi-threading mechanism was used to achieve efficient real-time display and analysis.
出处
《海洋科学》
CAS
CSCD
北大核心
2015年第7期86-92,共7页
Marine Sciences
基金
海洋公益性行业科研专项:海上船只目标星-机-岛立体监视监测技术系统(201505002)
