【摘要】 利用对比监测卫星(Earth Observing Satellites,EOS)和中分辨率成像光谱仪(Moderate Resolution Im-aging Spectroradiometer,MODIS)资料多波段和多空间分辨率的优势,研究了在混和像元中分解出亚像元火点,建立不同红外波段混和像元二元非线性方程表达式,利用牛顿迭代法求解亚像元火点的面积和亮度温度。通过对2002-2004年的我国西北地区典型火情进行估算,可以认为,该方法为小火点和扑灭后的余火估算提供了一种有效的途径。更多还原

【Abstract】 The method of sub-pixel fire spot extracting from mixed pixels was researched and the nonlinear equation of the different infrared bands and mixed pixels was established using the advantage of many bands and multi-spatial resolutions of EOS/MODIS data.The Newton′s iteration method was used to evaluate sub-pixel size and the brightness temperature of fire spot.The typical fire in the west-north of China from 2002 to 2004 was estimated by this method.The result indicated that the method was effective to evaluate small fire spot and residual fire which has been crushed out.更多还原