Microwave Radiometer measurements of sky brightness temperature taken at Summit Station, Greenland - Arctic Observing Network program

This dataset contains measurements of downwelling brightness temperature at 16 frequencies between 22.2 and 150 GHz at approximately 5 s temporal resolution. The observations were made by two radiometers (from Radiometer Physics GmbH) that are
time-synced. This dataset contains only sky brightness temperatures; however, these data can be used to retrieve precipitable water vapor, cloud liquid water path, and profiles of temperature in the boundary layer. These radiometers periodically
collect elevation scan data (horizon to horizon) that will be used to improve accuracy of the retrieved temperature profiles and to use for in-field calibrations (via tip-curve analysis). The radiometers are calibrated using liquid nitrogen
approximately 4 times per year. The raw data are converted into netCDF format. The ICECAPS field operations at Summit are supported by the National Science Foundation's Arctic Observing Network (AON) Program.

本数据集包含22.2至150 GHz频段内16个频率下的下行亮温度测量数据，时间分辨率约为5秒。观测由两台来自辐射计物理有限公司（Radiometer Physics GmbH）的时间同步辐射计完成。本数据集仅包含天空亮温度数据，但可用于反演可降水量、云液态水路径以及边界层温度廓线。这些辐射计会定期采集从地平线到地平线的仰角扫描数据，该数据可用于提升反演温度廓线的精度，并可通过尖峰曲线分析（tip-curve analysis）开展野外校准工作。这些辐射计每年约使用液氮进行4次校准。原始数据已转换为netCDF格式。位于萨米特（Summit）的ICECAPS野外作业项目由美国国家科学基金会（National Science Foundation）北极观测网（Arctic Observing Network, AON）项目提供支持。