DocumentCode :
66016
Title :
A Spectral Angle Distance-Weighting Reconstruction Method for Filled Pixels of the MODIS Land Surface Temperature Product
Author :
Tong Shuai ; Xia Zhang ; Shudong Wang ; Lifu Zhang ; Kun Shang ; Xiaoping Chen ; Jinnian Wang
Author_Institution :
Inst. of Remote Sensing & Digital Earth, Beijing, China
Volume :
11
Issue :
9
fYear :
2014
fDate :
Sept. 2014
Firstpage :
1514
Lastpage :
1518
Abstract :
Land surface temperature (LST) is an important parameter in the physics of land surface processes, but a large number of pixels are often filled as zero due to cloud, heavy aerosols, and so on in the Moderate-resolution Imaging Spectroradiometer (MODIS) LST product. This letter presents the spectral angle distance (SAD)-weighting reconstruction (SADWER) method of reconstruction of zero-filled pixels of the MODIS LST product. It relies on the hypothesis that pixels with the same land-cover type have nearly the same LST in a localized area. SAD can measure the similarity of land-cover types of different pixels, and pixels with higher land-cover similarity can contribute more to the reconstruction using the weighting method. The result shows that the reconstruction ratio could be as high as 95% using only the SADWER method and nearly 100% after spatial filter postprocessing. The reconstruction accuracy is validated using artificially generated 20-, 50-, and 80-km-diameter concentrically filled areas in both forest and crop land-cover types. The statistical result shows that the standard deviations of the reconstruction errors are less than 2 Kelvin.
Keywords :
atmospheric techniques; geophysical signal processing; land cover; land surface temperature; radiometry; remote sensing; MODIS LST product; Moderate Resolution Imaging Spectroradiometer; SAD-weighting reconstruction; SADWER method; land cover types; land surface processes; land surface temperature; pixel land cover type; spatial filter post processing; spectral angle distance-weighting reconstruction method; zero filled pixels; Image reconstruction; Land surface; Land surface temperature; MODIS; Remote sensing; Surface reconstruction; Temperature sensors; Filled pixels; land surface temperature (LST); moderate-resolution imaging spectroradiometer (MODIS); reconstruction; spectral angle distance (SAD);
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
Publisher :
ieee
ISSN :
1545-598X
Type :
jour
DOI :
10.1109/LGRS.2013.2297735
Filename :
6716033
Link To Document :
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