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Spectral reflectance characteristics of different snow and snow-covered land surface objects and mixed spectrum fitting

Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
By: , and 

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Abstract

The field spectroradiometer was used to measure spectra of different snow and snow-covered land surface objects in Beijing area. The result showed that for a pure snow spectrum, the snow reflectance peaks appeared from visible to 800 nm band locations; there was an obvious absorption valley of snow spectrum near 1030 nm wavelength. Compared with fresh snow, the reflection peaks of the old snow and melting snow showed different degrees of decline in the ranges of 300~1300, 1700~1800 and 2200~2300 nm, the lowest was from the compacted snow and frozen ice. For the vegetation and snow mixed spectral characteristics, it was indicated that the spectral reflectance increased for the snow-covered land types(including pine leaf with snow and pine leaf on snow background), due to the influence of snow background in the range of 350~1300 nm. However, the spectrum reflectance of mixed pixel remained a vegetation spectral characteristic. In the end, based on the spectrum analysis of snow, vegetation, and mixed snow/vegetation pixels, the mixed spectral fitting equations were established, and the results showed that there was good correlation between spectral curves by simulation fitting and observed ones(correlation coefficient R2=0.9509).

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Spectral reflectance characteristics of different snow and snow-covered land surface objects and mixed spectrum fitting
Series title Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
Volume 31
Issue 9
Year Published 2011
Language English
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 4 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
First page 2499
Last page 2502