NOAA/AVHRR冬小麦苗情长势遥感动态监测方法研究

A RESEARCH ON THE METHOD OF NOAA/AVHRR MONITOR OF REMOTE SENSING THE GROWING TENDENCY OF WINTER WHEAT

摘要: 植物的外在表现总是具有独特的光谱属性.因此作物的“苗情长势”可以通过它们的光谱成分分析和植物指数(绿度)间接地得到证实.本文根据冬小麦反射光谱特性,利用一定条件下的NOAA/AVHRR通道1(CH1,0.58-0.68μm)和通道2(CH2,0.72-1.1μm)数据,合成具有压抑较稳定背景地物信息,突出冬小麦长势信息作用2,3的绿度比值(G1=CH2/CH,)模式和归一化G3=(CH2-CH1)/(CH2+CH1)模式,研究解决了利用气象卫星遥感信息对大面积冬小麦苗情长势进行宏观动态监测的统一指标和时空可比等问题.并经多年实用,取得了良好的社会经济效益.

Abstract: The relations between greenness and agronomic index of winter wheat are researched,agronomic index of winter wheat growing tendency and meteorological conditions are established,and the criterion of remote sensing macromonitoring greenness index of the growing tendency of winter wheat in different areas and categories is determined.