SSM/I的云南思茅微波发射率的稳定性分析  

Stability analysis of microwave emissivity in Simao Yunnan using SSM/I data

作　　者：游然[1,2] 杨虎[2] 卢乃锰[3] 

机构地区：[1]南京信息工程大学遥感学院,江苏南京210044 [2]中国气象局中国遥感卫星辐射测量和定标重点开放实验室国家卫星气象中心,北京100081 [3]国家卫星气象中心,北京100081

出　　处：《遥感学报》2009年第5期887-900,共14页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家自然科学(编号:40605008/D0503);国家863计划(编号:2007AA12Z115)~~

摘　　要：利用装载于美国国防卫星上的特种微波成像仪SSM/I资料和相应的气象台站观测地面和探空资料,在微波辐射传输模拟分析的基础上,对云南思茅的微波发射率特性的稳定性进行定量分析。分析结果表明,中国云南思茅地区地表植被覆盖度较好,地表微波发射率稳定。地表微波发射率有弱的正弦季节变化(变化幅度很小,最大不超过0.02),在1—4月有很小的年际变化(发射率最大差异约0.008),这些在有地面和探空观测的情况下,可以通过模式模拟得到跟踪订正。The Microwave Temperature Sounder, the Microwave Humidity Sounder and the Microwave Radiation Imager were flown on the new-generation polar satellite FY-3A in China. The microwave sensors＇ calibration after launch is a critical problem. Using the SSM/I data, and the surface and raob observations, the stability of microwave emissivity in Simao Yunnan is analyzed based on the microwave modeling in this article. The results show that its vegetation situation is very good, and the surface microwave emissivity is stable. The surface microwave emissivity has weak season-to-season variation in law of sines （ the changing range is less than 0.02 ）. It also has very small year-to-year difference, which can be corrected by modeling based on the surface and raob observations.

关 键 词：云南思茅 微波发射率 稳定性分析 SSM/I 

分 类 号：TP702[自动化与计算机技术—检测技术与自动化装置] TP79[自动化与计算机技术—控制科学与工程]