摘要
对MODIS数据的分裂窗算法进行了简要介绍,通过交互式数据语言(IDL)编程,实现了直接利用MODIS lB数据的雪面温度反演,并将反演结果存贮为标准的HDF文件格式,以供其他软件使用。以我国新疆北部(北疆)为例,将该算法的反演结果与气象站雪面温度观测资料进行对比,结果表明:系统反演得到的雪面温度分布规律与气象观测资料是一致的,反演的平均误差为1.73℃,基本反映了北疆地区的雪面温度分布情况。
In this paper, the splits window algorithm developed by Qin was used to retrieve the snow surface temperature （TS） from MODIS 1B data by using Interactive Data Language （IDL） programming. An IDL program was written for the TS retrieval. The retrieved TS data were saved in the HDF file readable into other software. Details of image processing and programming were shown in this paper. Finally ,the authors chose northern Xinjiang as an example to demonstrate the applicability of the approach. The retrieved TS data were compared with the observed snow temperatures from automatic meteorological stations. The result of the comparison indicates that the retrieved TS distribution is consistent with the observed one, and the average error is 1.73℃, which is acceptable. Therefore, the TS distribution in northern Xinjiang could be rapidly retrieved using the proposed IDL approach.
出处
《国土资源遥感》
CSCD
2010年第4期29-33,共5页
Remote Sensing for Land & Resources
基金
中央级公益性科研院所基本科研业务项目(编号:IDM200704
IDM200808)
沙漠气象科学研究基金项目(编号:SQJ2009006)
科技部公益性行业(气象)科研专项(编号:GYHY200706008)共同资助
关键词
分裂窗算法
雪面温度
反演
MODIS
IDL
Splits window algorithm
Snow surface temperature
Retrieval
MODIS
IDL
