摘要
利用3对同日过空的ASTER和ETM+影像对,开展了ETM+和ASTER热红外影像的定量比较,求出了二者的关系转换方程。定量研究结果表明,ASTER和ETM+热红外数据具有极显著的正相关关系,所求出的转换关系方程有很高的精度。但二者仍有一定的差异,表现在ASTER数据反演的传感器处温度要比ETM+平均高0.66℃~0.82℃,其所表现的热信息量也要比ETM+丰富且连续。
A tandem cross calibration between ASTER＇s and Landsat ETM＋＇s thermal data was carried out.Three simultaneous TIR image pairs of the two sensors,each of which imaged on common ground targets,were used to quantitatively compare the thermal quality ofthe two sensors.The comparison has been made between Landsat ETM＋ band 6 and ASTER bands 13 and 14.The result shows that an excellent agreement between the at-sensor temperatures obtained from both sensors for the TIR band（s）.A very strong positive correlation between the two sensors＇ TIR data has been revealed.However,the at-sensor temperature derived from ASTER thermal images is 0.66 ℃-0.82 ℃,higher than that derived from ETM＋ thermal images.In addition,the ASTER TIR images have higher thermal information gain and more continuous measurement on ground thermal targets.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2011年第8期936-940,1007,共6页
Geomatics and Information Science of Wuhan University
基金
福建省自然科学基金资助项目(2007J0132)
国家自然科学基金资助项目(40371107)
