SGP97 Upper Air: DOE ARM 50 MHz Profiler RASS

The Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) 50 MHz Radar Wind Profiler and Radio Acoustic Sounding System (RASS) Vertical Profiles is one of various data sets provided for the Southern Great Plains 1997 (SGP97) project. This data set contains vertical profiles of virtual temperature and wind speed and direction every hour taken at the Central Facility. This data set covers the period from 1 June through 31 July 1997. The SGP97 domain is approximately 97W to 99W longitude and 34.5N to 37N latitude. These data are in their original NetCDF format. The 50-MHz Radar Wind Profiler/RASS (RWP50) measures wind profiles from (nominally) 2 to 12 km and virtual temperature profiles from 2 to 4 km. It operates by transmitting electromagnetic energy into the atmosphere and measuring the strength and frequency of backscattered energy. Virtual temperatures are recovered by transmitting an acoustic signal vertically and measuring the electromagnetic energy scattered from the acoustic wavefront. The propagation speed of the acoustic wave is proportional to the square root of the virtual temperature. The primary quantities measured with the system are the intensity and Doppler frequency of backscattered radiation. The wind speed is determined from the Doppler frequency of energy scattered from refractive index fluctuations (caused primarily by temperature fluctuations) embedded within the atmosphere; the virtual temperature is determined from the Doppler frequency of microwave energy scattered from acoustic energy propagating through the atmosphere. No additional quality control was performed by the University Corporation for Atmospheric Research/Joint Office for Science Support (JOSS). Resources in this dataset:Resource Title: GeoData catalog record. File Name: Web Page, url: https://geodata.nal.usda.gov/geonetwork/srv/eng/catalog.search#/metadata/8a80ab85-3f5b-4a36-8e46-747452fd5929

能源部大气辐射测量（DOE Atmospheric Radiation Measurement，简称ARM）南部大平原（Southern Great Plains，简称SGP）的50 MHz雷达风廓线仪和无线电声学探测系统（Radio Acoustic Sounding System，简称RASS）垂直剖面数据集是针对1997年南部大平原项目（SGP97）提供的多种数据集之一。本数据集包含在中央设施每小时采集的虚拟温度和风速及风向的垂直剖面。该数据集覆盖了从1997年6月1日至7月31日的时段。SGP97的研究区域大致位于97W至99W经度和34.5N至37N纬度。这些数据以原始的NetCDF格式存储。50-MHz雷达风廓线仪/RASS（RWP50）能够测量从（近似）2至12公里的风剖面和从2至4公里的虚拟温度剖面。其工作原理是通过向大气中发射电磁能量并测量反射回的能量强度和频率。通过垂直发射声波并测量从声波前沿散射的电磁能量来恢复虚拟温度。声波的传播速度与虚拟温度的平方根成正比。该系统主要测量的量是反射辐射的强度和多普勒频率。风速是通过测量大气中由温度波动（主要由温度波动引起）导致的折射指数波动散射的能量多普勒频率来确定的；虚拟温度是通过测量通过大气传播的声能量散射的微波能量多普勒频率来确定的。大气研究大学公司/联合科学支持办公室（University Corporation for Atmospheric Research/Joint Office for Science Support，简称JOSS）未对数据进行额外的质量控制。本数据集中的资源：资源标题：GeoData目录记录。文件名：网页，URL：https://geodata.nal.usda.gov/geonetwork/srv/eng/catalog.search#/metadata/8a80ab85-3f5b-4a36-8e46-747452fd5929