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Analysis of the Acoustic Chirp Signal of EAR-RASS for Improving Its Temperature Profile Data Retrieval

机译:用于改善其温度曲线数据检索的耳环声啁啾信号的分析

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This research conducted an experiment on EAR-RASS acoustic chirp signal to find the better configuration for virtual temperature profile data retrieval. A single frequency acoustic pulses are susceptible to Doppler shift error, the utilization of continuous wave and chirped signals become a solution. Therefore, commonly the acoustic wave source is transmitted at different frequencies in order to meet wavelength condition for obtaining Bragg condition at wide range of altitudes. Several chirp configurations for EAR-RASS have been tested by changing their sweep range and time during these experiments. The ray-tracing method is applied before each experiment and confirmed by the Doppler spectra performance to ensure that the observation is conducted in the RASS echoes region. Compared to the other configuration, the 90-110 Hz has better performance as it produces highest echo power hence better virtual temperature data retrieval.
机译:该研究对耳垂声学Chirp信号进行了实验,以找到更好的虚拟温度曲线数据检索配置。 单频声脉冲易受多普勒换档误差的影响,利用连续波和啁啾信号成为一个解决方案。 因此,通常,声波源以不同的频率发送,以满足波长条件以获得广泛的高度的布拉格条件。 通过在这些实验期间改变它们的扫描范围和时间来测试耳轮的几种Chirp配置。 在每个实验之前应用光线跟踪方法,并通过多普勒光谱性能证实,以确保在RASS回波区域中进行观察。 与其他配置相比,90-110 Hz具有更好的性能,因为它产生最高的回声功率,因此更好的虚拟温度数据检索。

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