宁夏区域性强沙尘暴卫星遥感监测系统

A Satellite Remote-sensing Monitoring System to Heavy Sandstorm in Ningxia

应用GMS 5或YF 2静止气象卫星云图资料,依据不同目标物(如水体、地表、沙漠、地面积雪、中高云、低云、扬沙、沙尘暴)在红外通道、可见光通道、水汽通道的平均灰度及光谱响应曲线的差异,利用多参数条件下的分类合成处理与评估技术,确定了宁夏及周边地区沙尘区(扬沙和沙尘暴)在静止卫星云图各通道中灰度阈值,建立了集信息综合分析和动态监测为一体的沙尘暴客观评估和实时监测系统。

The grayscale thresholds for meteorological satellite channels were selected to determine the sandstorm area in Ningxia and adjacent region by using GMS-5 or FY-2 geostationary meteorological satellite data, based on the spectrum differences of different objects (such as water, land surface, desert, snow, meso-high cloud and low cloud, and sandstorm) in infrared, visible and vapor channels, and supported by classified synthesis process and assessment technology with multi parameters, on which an objective evaluating and monitoring system on sandstorm which provides the functions of data collection, analysis and dynamic monitoring was set up.