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Accuracy Evaluation of MODIS Atmospheric Correction and Its Effects on Surface-Snow Density Extraction |
| LIU Yan 1， WANG Hong 2， ZHANG Pu 1， LI Yang 1 |
| （1．Institute of Desert Meteorology， CMA， Urumqi 830002， China； 2.Institute of Remote Sensing Applications， Sichuan Academy of Agricultural Sciences， Chengdu 610066， China） |
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Abstract With Gurbantunggut desert as the study area and by using moderate resolution imaging spectrometer (MODIS) data, which is a kind of optical remote sensing data，in combination with snow reflectance spectra simultaneously measured by ASD Field Spec, the authors evaluated the correction capability of FLAASH model. Some results have been attained: ① Snow reflectance from 1st to 7th band of MODIS is similar to the simultaneously measured snow reflectivity，and the correlation coefficient of all bands is 0.82 on the whole， indicating that FLAASH can greatly enhance the capability for identifing surface features of M0DIS . ② On the basis of linear relationship between snow reflectance after correction at MODIS channel 6 and NDSI and measured snow density, a snow density remote computation model can be built by way of regression and fitting.
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| Keywords
Point resource system
Remote sensing
Objects extraction
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Issue Date: 22 March 2011
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2011,
Vol. 23
