新一代极轨气象卫星FY3A-VIRR数据的地表火监测算法研究与评价

首先对新一代极轨气象卫星FY3-VIRR（可见光红外扫描辐射计）传感器热异常监测特性进行描述,比较了VIRR、AVHRR、MODIS三个传感器的4μm通道光谱响应特征,给出VIRR数据定标计算和几何校正的算法,在分析VIRR传感器热异常监测特性的基础上,给出考虑像元背景亮温的火点识别算法,经过试验得到云识别和火点检测参...

Research and evaluation of the algorithm of land surface fire detection based on FY3-VIRR data

In this paper,we first examine the characters of FY3-VIRR data and their application in monitoring the surface thermal anomaly pixels.Further,the response characteristics at 4μm of VIRR,AVHRR and MODIS are compared,and the calibration and calculating algorithm of VIRR is presented.We proceed to propose the method of monitoring thermal anomaly pixels using VIRR data,for which the background temperature is considered.The reasonability this method is validated by the data of biomass burning occurred in June 2006.It is finally concluded that the thermal anomaly detection capability of VIRR data at 4μm is superior to MODIS data in selected cases.