摘要
利用遥感影像获取地表温度信息,对于监测地表状况和生态环境变化有重要意义.利用MODIS影像和劈窗算法计算了反演地表温度的关键参数:大气透过率和地表比辐射率,并针对湖北省水域单独提取出水体像元来计算地表比辐射率,估算出湖北省地表温度,与地面同步实测数据比较表明,平均误差为0.51℃,精度比较高.
A Land surface temperature information can be retrieved from Remote Sensing image, which is important and significant to observe macroscopically the erath＇s surface statu and ecological and environmental change. The essay retrieves the atmospheric transmittance and the surface emissivity which are required when LST is calculated u- sing MODIS image by split-window algorithm. The surface emissivity is calculated by means of obtaining the water pure pix individually in that the water area in Hubei Province can not be ignored. Then, the values of LST in Hubei Province are derived in this method. The comparison with the ground synchronization observation data shows that the total average error is 0.5 1℃, therefore, the estimated precision is reasonable quitely.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
2007年第1期143-147,共5页
Journal of Central China Normal University：Natural Sciences
基金
国家"863"项目(2006AA12Z128)
关键词
地表温度
MODIS
精度
大气透过率
地表比辐射率
land surface temperature
MODIS precision atmospheric transmittance
surface emissivity
