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RASS (Radio Acoustic Sounding System): A new radar observation technique forprofiling atmospheric temperature

机译：RASS（无线电声测深系统）：一种用于分析大气温度的新雷达观测技术

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摘要

The operational weather station of a meteorological agency normally employs a balloon-borne radiosonde to measure temperature (7) profiles. However, the temporal resolution of radiosondes is 12-24 hr, which is insufficient to investigate details of the medium (meso)-scale meteorological phenomena such as the cumulonimbus convection accompanying a severe rain event with time scales of a few hours in their generation and development processes. Radio Acoustic Sounding System (RASS) has been developed asa radar remote-sensing technique to continuously observe atmospheric temperature profiles. RASS consists of a wind profiling radar (WPR), such as the MU radar, Equatorial Atmosphere Radar (EAR), and a boundary layer radar (BLR), and an acoustic transmission system. Figure 1 shows the basic principle of RASS. A large power sound is emitted high up into the sky, then, refractive index (n) variations are artificially created associated with the upward propagation of the sound waves. WPR can detect faint radio wave scattering by the n perturbations, which is called the RASS echo. The speed of sound (Cs) is measured from the Doppler frequency shifts of the RASS echo. Then, we can determine a T profile using a relationship that Cs is proportional to VT.
机译：气象机构的运营气象站通常使用气球式无线电探空仪来测量温度（7）曲线。然而，无线电探空仪的时间分辨率为12-24小时，不足以调查中等（中尺度）气象现象的细节，例如伴随着严重降雨事件的积雨云对流，其产生和发展的时间尺度为数小时。开发过程。无线电声测深系统（RASS）已开发为一种雷达遥感技术，可以连续观察大气温度剖面。 RASS由风廓线雷达（WPR）（例如MU雷达），赤道大气雷达（EAR）和边界层雷达（BLR）以及声音传输系统组成。图1显示了RASS的基本原理。大功率的声音高高地发射到天空，然后，与声波的向上传播相关联地人为地创建了折射率（n）变化。 WPR可以通过n个扰动检测到微弱的无线电波散射，这称为RASS回波。声音的速度（Cs）是根据RASS回波的多普勒频移测量的。然后，我们可以使用Cs与VT成正比的关系来确定T轮廓。

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