GPM GROUND VALIDATION ENVIRONMENT CANADA (EC) PRECIPITATION OCCURRENCE SENSOR SYSTEM (POSS) GCPEX

The GPM Ground Validation Environment Canada (EC) Precipitation Occurrence Sensor System (POSS) GCPEx dataset is comprised of data gathered during the GPM Cold-season Precipitation Experiment (GCPEx), which took place in Ontario, Canada, January 15 - March 1, 2012. GCPEx addressed shortcomings in the GPM snowfall retrieval algorithm by collecting microphysical properties, associated remote sensing observations, and coordinated model simulations of precipitating snow. The POSS is a bi-static X-band Doppler radar designed by Environment Canada. The POSS measures a signal whose frequency is proportional to the particle Doppler velocity and whose amplitude is proportional to the particle scattering cross-section. Its measurements can be used to provide information regarding precipitation occurrence, type, rate, and raindrop size distribution.

GPM 地面验证环境加拿大（EC）降水发生传感器系统（POSS）GCPEx 数据集由在加拿大安大略省进行的大降水实验（GCPEx）期间收集的数据组成，该实验于2012年1月15日至3月1日举行。GCPEx 通过收集微物理特性、相关的遥感观测以及降水雪的协调模型模拟，旨在解决 GPM 雪降提取算法的不足之处。POSS 是由加拿大环境部设计的一种双基地X波段多普勒雷达。POSS 测量的信号频率与粒子多普勒速度成正比，其幅度与粒子散射截面成正比。其测量结果可用于提供有关降水发生、类型、速率以及雨滴尺寸分布的信息。