摘要
本文详细阐述了用ＮＯＡＡ气象卫星的ＡＶＨＲＲ３、４、５通道数据求地面温度场的分裂窗方法。并对计算结果进行了误差分析，与实测地面温度对照，误差±０．５Ｋ达７０％以上。
The land surface temperature field is calculated with NOAA-AVHRR data by split-window method. In this method ,the surface emissivity is computed first from the brightness tempernture of Channels 3. 4 and 5. then in conjunetion with the emissivity and the brightnass temperature of Channels 4 and 5 the land surface temperature is derived. The comparison between the computed results and the observations of local stations at about the same time indicates that the difference is about 80% within 1℃ in the nighttime but only 67% in the daytime. The maximum difference is -3. 8℃. As a macro-monitoring measure,this method is acceptable in estimating land surface temperature.
出处
《地球物理学进展》
CSCD
1996年第2期35-52,共18页
Progress in Geophysics
关键词
遥感
热红外辐射
分裂窗法
地面温度场
land surface temperature field
brightness temperature
split-window method
emissivity
