Ka-Band Scanning ARM Cloud Radar (KASACR) CF-Radial Data Hemispherical Sky RHI Scan - kasacr2cfrhsrhi

The Ka-Band Scanning ARM Cloud Radar (KASACR) records cloud properties. \n \nARM's scanning cloud radars are dual-frequency, dual-polarization Doppler radars mounted on a common scanning pedestal. Each pedestal includes a Ka-band radar (2kW peak power) and the deployment location determines whether the second radar is a W-band (1.7 kW peak power) or an X-band (20 kW peak power). \n \nBeamwidths for Ka-bands paired with W-bands are roughly matched at 0.3 degrees. The X-band beamwidth is approximately 1 degree. Due to the narrow antenna beamwidth, ARM s scanning cloud radars use scanning strategies unlike typical weather radars. Rather than focusing on plan position indicator, or PPI, scans, the Ka-SACR uses range height indicator, or RHI, scans at numerous azimuths to obtain cloud volume data. Measurements collected with the Ka-SACR are copolar and cross-polar radar reflectivity, Doppler velocity, spectra width and spectra when not scanning, and linear depolarization ratio.

Ka波段扫描ARM云雷达（Ka-Band Scanning ARM Cloud Radar，KASACR）用于采集云属性相关数据。

ARM旗下的扫描云雷达均为双频双极化多普勒雷达，搭载于同一扫描转台。每台转台均配备一部Ka波段雷达（峰值功率2kW），第二部雷达的频段由布设位置决定，可为W波段（峰值功率1.7kW）或X波段（峰值功率20kW）。

Ka波段与W波段配对时，二者波束宽度大致匹配，约为0.3°；X波段波束宽度则约为1°。由于天线波束宽度极窄，ARM扫描云雷达采用与常规天气雷达截然不同的扫描策略：其并未侧重平面位置指示（Plan Position Indicator，PPI）扫描模式，而是Ka-SACR会在多个方位角下采用距离高度指示（Range Height Indicator，RHI）扫描，以获取云体体积数据。Ka-SACR采集的测量参数包括同极化与交叉极化雷达反射率、多普勒速度、非扫描状态下的谱宽与频谱，以及线性退极化比。