GPM GROUND VALIDATION COMPOSITE SATELLITE OVERPASSES GCPEX V1

The GPM Ground Validation Composite Satellite Overpasses GCPEx dataset provides satellite overpasses from the Special Sensor Microwave Imager/Sounder (SSMIS) satellites (F-16, 17, 18) during the GPM Cold-season Precipitation Experiment (GCPEx) which took place in Ontario, Canada, January 17, 2012 through February 29, 2012. The radiometric data was matched up with other datasets necessary to carry out land surface emissivity studies. These other datasets include the NEXRAD National Mosaic and Multi-Sensor QPE (NMQ) radar mosaic for knowledge of rain structure and intensity at the time of the overpass, as well as the previous accumulated precipitation prior to the satellite overpass time, the NOAA Interactive Multisensor Snow and Ice Mapping System (IMS) snow mapping system (to identify surface snow or ice cover), and the NASA/GMAO Modern-Era Retrospective Analysis for Research (MERRA) land and atmospheric reanalysis (for background land and atmospheric state needed for microwave radiative transfer calculations). The identified SSMIS satellite overpasses passed within 700-km of the central field site.

GPM 地面验证复合卫星穿越 GCPEx 数据集提供了在加拿大安大略省进行的 GPM 冷季降水实验 (GCPEx) 期间，由特殊传感器微波成像仪/探测器 (SSMIS) 卫星（F-16、17、18 型）所获得的卫星穿越数据。该辐射计数据与进行地表发射率研究所需的其它数据集进行了匹配。这些数据集包括 NEXRAD 国家拼图和多传感器定量降水估测 (NMQ) 雷达拼图，以了解穿越时刻的雨滴结构和强度；以及穿越前积累的降水量，NOAA 交互式多传感器雪和冰制图系统 (IMS) 雪制图系统（用于识别地表积雪或冰覆盖），以及 NASA/GMAO 现代大气再分析 (MERRA) 陆地和大气再分析（用于微波辐射传输计算所需的背景陆地和大气状态）。所识别的 SSMIS 卫星穿越在中央观测场中心区域 700 公里范围内。