Average measures of PPLK, PMC, PHS and other short-term quantitative precipitation nowcasting (QPN) methods with 30 min, 60 min, 90 min and 120 min lead time.

*PPLK: Pixel-based QPN using the Pyramid Lucas-Kanade Optical-Flow method; MCM: Pixel-based QPN using the maximum correlation method; PHS: Pixel-based QPN using Horn-Schunck optical-flow method; PERCAST: PERsiann (Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks) - -ForeCAST; PERCAST-GD: PERsiann-ForeCAST considering the storm Growth and Decay (GD) whose area increases or decreases compared to previous moments; WDSS: Warning Decision Support System; PER: PERsistence. The PMC, PHS and PPLK were compared based on 2338 images of 8 periods of FY-2F in this paper. The PERCAST-GD, PERCAST, WDSS~II and PER was compared by Zahraei et al. [6] based on four storms from GOES-IR data over a rectangular region in 80–115°W and 32–45°N.Average measures of PPLK, PMC, PHS and other short-term quantitative precipitation nowcasting (QPN) methods with 30 min, 60 min, 90 min and 120 min lead time.

PPLK：基于像素的定量降水临近预报（Quantitative Precipitation Nowcasting, QPN）方法，采用金字塔卢卡斯-卡纳德光流法（Pyramid Lucas-Kanade Optical-Flow method）；MCM：基于像素的采用最大相关法的QPN方法；PHS：基于像素的采用霍恩-舒恩克光流法（Horn-Schunck optical-flow method）的QPN方法；PERCAST：波斯遥感降水估算（Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks, PERsiann）-预报（ForeCAST）方法；PERCAST-GD：考虑风暴生消（Growth and Decay, GD）的PERCAST方法，即相较于前一时刻风暴面积存在增减变化的PERCAST变体；WDSS：预警决策支持系统（Warning Decision Support System, WDSS）；PER：持续法（PERsistence, PER）。本文采用FY-2F卫星8个时段的2338幅图像，对PMC、PHS与PPLK三种方法进行了对比分析。Zahraei等[6]以GOES-IR数据中80°W~115°W、32°N~45°N矩形区域内的4次风暴事件为研究对象，对PERCAST-GD、PERCAST、WDSS~II及PER四种方法开展了对比实验。针对30 min、60 min、90 min及120 min的预报提前量，本文给出了PPLK、PMC、PHS及其他短时定量降水临近预报（QPN）方法的平均性能指标。