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《Science of Surveying and Mapping》 2007-01
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Sensitivity analysis of mono-window and single-channel algorithms to the possible errors in parameter estimation

DING Feng ①②,XU Han-qiu ①(①College of Environment and Resources,Fuzhou University,Fuzhou 350002,China;②College of Geographical Science,Fujian Normal University,Fuzhou 350007,China)  
The advent of the mono-window algorithm(MWA)and single-channel method(SCM)has opened up a new way for retrieving land surface temperature(LST)from Landsat TM thermal band.However,due to the great difficulty of obtaining the in situ ground measurements comparable to the pixel size of Landsat TM6 data at the satellite pass,validation of these two algorithms with the in situ measurements is still not feasible at the present time.In this paper,a sensitivity analysis has been conducted to examine the effects of possible errors in the three parameter(i.e.,ground emissivity “ε”,near-surface air temperature “T 0” and the atmospheric water vapor content “w”)estimations on LST retrievals,thus to provide an alternative way to assess the performance of the two algorithms.The research results show that:(1)both MWA and SCM are not very sensible to the possible errors of ε;(2)MWA is more sensible to the possible errors of w(when T 0 is low)or T 0(when w is high),if compared with the relatively insignificant impact of the possible errors of ε on the retrieved LSTs;(3)as for SCM,the effect of the possible errors of w on the LST retrievals is much greater than that of ε.
【Fund】: 国家自然科学基金项目(40371107);; 国家自然科学基金项目(40371096);; 福建省自然科学基金计划资助项目(项目编号:2006J0281);; 福建省教育厅科技项目(JB050303)
【CateGory Index】: TP79
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