陆面温度的反演算法和大气订正的影响  

RETRIEVAL ALGORITHM FOR LAND SURFACE TEMPERATURE AND EFFECT OF ATMOSPHERIC CORRECTION 

作　　者：汪宏七[1] 赵高祥[1] 王立志[1] 

机构地区：[1]中国科学院大气物理研究所,北京100029

出　　处：《红外与毫米波学报》2000年第1期48-52,共5页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金!(编号 :496752 4 8)

摘　　要：提出了由卫星辐射测量反演陆面温度的算法,可在不需要预先给定通道的地面比辐射率的情况下,同时确定地面温度和比辐射率.同时,为了了解实际应用这种算法的可能性,在一系列陆面温度反演的模拟试验中,考察分析了在大气温度和湿度廓线有各种不同的误差时大气订正对陆面温度反演精度的影响.结果表明,在大气订正中应用的大气温度和湿度的误差不超过通常由探空和卫星遥感得到的大气温度和湿度的误差时,反演得到的地面温度仍可具有较好的精度,在考虑的大多数情况下,均方根误差小于1K.An algorithm have been presented to retrieve land surface temperature from satellite radiative measurements, without requiring the channel land surface emissivities to be given previously. And by taking different errors in atmospheric temperature and moisture profiles into consideration in retrieval tests of land surface temperature, the atmospheric effect has been investigated, in order to see the possibility for the practical application of the retrieval algorithm. The results show that when the errors in atmospheric temperature and moisture are reasonable as usually could be obtained from radiosonde or satellite retrieval, the land surface temperatures might be determined with acceptable accuracies and the root mean square errors are less than 1K in most cases considered.

关 键 词：陆面温度 陆面比辐射率 卫星遥感 反演算法 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置] P407[自动化与计算机技术—控制科学与工程]