915-MHz Radar Wind Profiler, precipitation moments data - 915rwpprecipmom

\n \nThe radar wind profiler/radio acoustic sounding system (RWP/RASS), available in 915-MHz (for U.S. deployments) and 1290-MHz (for foreign deployments), measures wind profiles and backscattered signal strength between (nominally) 0.1 km and 5 km and virtual temperature profiles between 0.1 km and 2.5 km. However, ARM no longer operates the RASS portion. \n \nThe RWP transmits electromagnetic energy into the atmosphere in as many as five directions (four tilted in opposing vertical planes and on vertical) and measures the strength and frequency of backscattered energy. Calculation of the Doppler shift of the returned signal allows calculation of the atmospheric wind profile.

雷达风廓线仪/无线电声学探测系统（radar wind profiler/radio acoustic sounding system, RWP/RASS）设有适用于美国部署场景的915兆赫型号，以及适用于海外部署场景的1290兆赫型号。该系统可在标称0.1千米至5千米的高度区间内测量大气风廓线与后向散射信号强度，并在0.1千米至2.5千米的高度区间内获取虚温廓线。不过ARM已停止运营其RASS分系统。
RWP可向大气发射最多五个方向的电磁能量：四个分别位于两个相对垂直平面内倾斜，另有一个垂直方向，并测量后向散射能量的强度与频率。通过对返回信号的多普勒频移进行计算，即可反演得到大气风廓线。