棉花遥感识别的最佳时相及地面模式研究

本文介绍棉花遥感识别的最佳时相选择和地面模式的建立方法与结果。结果表明,对试验区和与试验区作物种类及其物候期类似的地区,选用六月底或七月上旬的陆地卫星 TM 资料,是可以监测棉花的。同时,农作物的农学参量与光谱反射率间的相关模式,为我们提供了一种较常规方法快速和经济的调查方法。

SELECTED OPTIMUN TEMPORAL AND DEVILOPED THE GROUND MODEL FOR THE DISCRIMINATION OF COTTON

This paper describes the methods and results of selected optimum temporal and devel-oped the ground model for the discrimination cotton from other crops.Based on the spectral date acguisition and analysis of cotton,spring cron,autumn cron,soybean,peanute,sesame,green gram and tobacco within ten growth,stages of cot- ton in the test region(north and centre areas of Henan province),we had developed the sta-tistics models for relatiomship between crops agricultural parameters,sueh as percent ground cover,leaf area index etc,and its PVI(perpendicular vegetation index)which was combined with crops speetra in the bands TM 1-4.Two factors variance analysis to spectral reflectance of cotton and others crops showed that the optimum temporal for discrimination cotton is from the last ten days period of June to the first ten days period of July.Results show it is possible to estimate the acreage under cotton using Landsat TM CCT date of optimum temporal and to provide a potential way for investigated agricul-tured parameter of crops with the ground model in test region.