In this paper, the multi-level wind velocity in the nocturnal steady state PBL is analysed, using the data of the 325 meter meteorological tower and acoustic sounder.
本文利用325米气象塔及声雷达探测资料分析了夜间平稳天气条件下行星边界层中风速出现多极值的现象。
Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
Top provider of full range acoustic components: Piezo sounder, Magnetic sounder, Speaker and Microphone/Receiver.
全线声学器件供应商，产品包括：压电发声器，磁性发声器，扬声器及麦克风/听筒。
Top provider of full range acoustic components: Piezo sounder, Magnetic sounder, Speaker and Microphone/Receiver.
全线声学器件供应商，产品包括：压电发声器，磁性发声器，扬声器及麦克风/听筒。
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