首页 >  2006, Vol. 10, Issue (4) : 586-592

摘要

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引用本文:

DOI:

10.11834/jrs.20060486

收稿日期:

修改日期:

2005-10-25

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利用AIRS观测资料进行红外高光谱大气探测能力试验的研究
摘要:

利用EOS Aqua卫星平台上搭载的光栅式高光谱分辨率大气红外探测仪器AIRS(Atmospheric Infrared Sounder)的实际观测资料,采用经验正交函数展开法(特征向量法)进行了大气温度、湿度廓线的反演误差敏感性试验研究。试验内容包括光谱覆盖、通道覆盖、通道宽度等。通过这些试验,研究在中国现有的经济、技术条件下要达到在对流层1km气层温度、湿度分别小于1K和20%的反演精度和垂直分辨率所应该具备的光谱通道特征,为发展中国自己的红外高光谱分辨率探测技术提供科学依据。试验计算结果表明,基于中国现有的经济和技术基础,发展具有100个左右的光谱通道,通道宽度为2-4个波数的干涉式红外大气探测仪器(比中国目前FY-3初期的滤光片式红外分光计的光谱波段宽度减小3-4倍),可明显改善大气参数反演精度,基本满足现阶段使用要求。

关键词:

红外  高光谱  AIRS  大气廓线  反演
Preliminary Study on the Capacity of High Spectral Resolution Infrared Atmospheric Sounding Instrument Using AIRS Measurements
Abstract:

Sensitivity expermi ents of spectral coverage, channel coverage and bandwidth are performed to\ninvestigate the channel characteristics designed tomeet the basic requirements of atmospheric profile retrieval\naccuracy of 1K for temperature and 20% for humidity in 1 km thick tropospheric layers. Temperature and\nhumidity profiles are retrieved from AIRS(Atmospheric Infrared Sounder) real measurements via empirical\northogonal function(Eigenvectors ofCovarianceMatrix) expansion methodology. Results suggest that notable\nmi provements of the atmospheric parameter retrieval accuracy can be achieved by developing infrared\ninterferometric spectrometer/radiometerwith about100 channels andwith bandwidth of2—4 wave numbers on\nthe current technicaland economicalbasisofour country. Thisbandwidth is3—4 tmi es smaller than thatof the\nearlier spectrometer/radiometer on FY-3 satellitewhichwillbe launched in the year of2006.

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