提高多普勒天气雷达晴空探测能力的一种方法
A METHOD FOR IMPROVING THE PROBING ABILITY OF DOPPLER WEATHER RADAR IN THE CLEAR AIR
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摘要: 该文通过对晴空大气返回信号特性的分析, 提出采用相干累积技术, 有可能提高多普勒天气雷达探测晴空大气的能力, 具体测算了提高探测能力的限度, 并对雷达信号处理器适应晴空探测进行了改进设计.Abstract:
By analyzing the characteristics of echo signal in the clear air, a coherent integral method is presented, which can improve the probing ability of Doppler weather radar in the clear air, and the limit of the improved ability is calculated. Based on the study, the design of the radar signal processor is improved to be applicable to the detection in the clear air.
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Key words:
- Doppler weather radar;
- Coherent integral;
- Clear air
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表 1 大气中Cn2值与其对应的等效反射率因子ZeT
表 2 各种型号的新一代天气雷达的主要参数
表 3 新一代天气雷达最小可测等效反射率因子Zemin (dBz) 随距离 (km) 的变化
表 4 S波段、C波段可进行相干累积的次数
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