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）分为915兆赫兹（适用于美国部署场景）与1290兆赫兹（适用于海外部署场景）两种型号，可测量标称0.1千米至5千米区间内的风廓线与后向散射信号强度，以及0.1千米至2.5千米区间内的虚温廓线。不过，ARM已不再运行该系统的RASS子模块。该RWP可向大气层最多五个方向发射电磁能量（四个分别位于两对相对垂直平面内且倾斜指向，另一个沿垂直方向），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，即可推演出大气风廓线。