Out-of-band correction technologies for the multispectral image of Mapping Satellite-1 by using EO-1 Hyperion data

摘要

A general method using intercalibration methodology and linear regression theory for correcting out-of-band (OOB) effects is proposed and applied for Chinese Mapping Satellite-1 (MS-1) to improve the radiometric quality of multispectral sensors. The correction coefficients for a particular broad band are conducted by the linear regression between simulation-corrected radiances and measured digital numbers. The simulation-corrected radiances are obtained by convolving referenced narrow-hyperspectral spectrum radiances with the spectral response function provided by the instrument vendor. An assumption wherein the relationship of in-band and OOB radiances has an extremely linear characteristic if in-band radiances are slightly greater than OOB radiances is proposed and then verified by experiments. The correction coefficients of OOB effects for four bands of the MS-1 multispectral sensor are presented by using hyperspectral data from EO-1 Hyperion. Positive results are achieved for the corrected images. (C) 2017 Optical Society of America