中文摘要：

资料稀缺地区的面雨量估算是水文学研究中的热点和难点问题.遥感逐渐成为解决这一问题的重要手段.拟以天山及周边地区为典型区,利用TRMM降水资料,探讨其适用性.利用研究区2000～2010年TRMM数据与区域内21个气象站的站点观测数据进行对比分析,通过不同时间尺度（月、季、年）和空间尺度的差异对比分析表明,在时间尺度上,相关系数均在0.7以上;在空间尺度上,其相对误差大部分在-40％～40％之间;最后对二者进行多项式拟合,确定性系数均在0.7以上,达到了显著相关水平.表明TRMM降水数据在天山山区有很好的适用性.研究结果对干旱区无资料区的水文过程研究具有重要应用价值.

英文摘要：

Estimation of the rainfall in the ungauged areas is very difficult.Remote is an important approach for resolving this problem in recent years.The applicability of TRMM precipitation data in Tianshan Mountains was studied in this paper.By comparing the TRMM data with observed data of the 21 meteorology stations from 2000 to 2010,we found there was a good consistency between them in different time scales and spatial scales.The results show that the correlation coefficient （R2） is greater than 0.7 in different temporal scales.The relative errors are between-40％ and 40％ in different spatial scales.It also indicates that the TRMM data could be used in the study area.This analysis is meaningful for the water resource study in ungauged areas.