Atmospheric Correction of Hyperion Data Based on 6S Model

摘要

Remotely sensed data is affected by absorption and scattering of the atmosphere with the result that the data can not meet the quantification remotely sensed require. Second Simulation of the Satellite Signal in the Solar Spectrum(6S) is a model to reduce these effects and present the ‘real’ surface reflective properties by virtue of many parameters such as geometric conditions, atmosphere and aerosols models, etc. With the advent of space-borne hyperspectral sensor, there is a need to reassess its potential. In this article based on the 6S model atmospheric correction is applied to the Earth Observing 1 (EO- 1) Hyperion hyperspectral data acquired over the Menghai county of Xishuangbanna, southwest China characterized by the southern subtropical climate. The atmosphere and aerosol parameters in 6S model is either given or user definition, but user defined parameters generally produce more accurate results but difficult obtainment. However, MODIS daily products of water vapor, aerosol and ozone can be employed to build the user-defined 6S input parameters conveniently and effectively. Research results indicate that 6S correction can remove the atmospheric absorption and scattering with highly satisfactory results and notably improve the vegetation characteristics.