- 相关推荐
Spectral Reflectance Characteristics of Different Snow and Snow-Covered Land Surface Objects and Mixed Spectrum Fitting
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 1 030 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 300~1 300,1 700~1 800 and 2 200~2 300 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 350~1 300 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 =0.950 9). 作者: Author: ZHANG Jia-hua[1] ZHOU Zheng-ming[2] WANG Pei-juan[3] YAO Feng-mei[4] Liming Yang 作者单位: Chinese Academy of Meteorological Sciences, Beijing 100081, China;Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing 100094, ChinaChinese Academy of Meteorological Sciences, Beijing 100081, ChinaCollege of Earth Sciences, Chinese Academy of Sciences, Beijing 100049, ChinaU.S. Geological Survey, Center for Earth Resources Observation and Science, Sioux Falls, South Dakota, 67198, USA 期 刊: 光谱学与光谱分析 ISTICEISCIPKU Journal: Spectroscopy and Spectral Analysis 年,卷(期): 2011, 31(9) 分类号: O433.4 Keywords: Snow Snow-covered land surface object Spectral characteristics Spectral fitting 机标分类号: P3 TP3 机标关键词: Objects Land Surface Snow melting snow vegetation correlation spectral reflectance different spectrum analysis land surface influence range of results objects Beijing based end 基金项目: National Natural Science Foundation of China,Global Change Research Projects of Key National Scientific Research Plan,the Social Commonweal Meteorological Research Project【Spectral Reflectance Characteristics】相关文章:
Reflectance Spectral Characteristics of Lunar Surface Materials08-27
Theoretical model and quantification of reflectance photometer08-01
Theoretical model and quantification of reflectance photometer10-18
Timescale Analysis of Spectral Lags10-07
Higher Toda Mechanics and Spectral Curves07-07
Spectral Test Instrument for Color Vision Measurement08-02
Spectral Properties of Anomalous X-ray Pulsars07-11
Partial and Spectral-Viscosity Models for Geophysical Flows11-29