Precision Verifications of Radiance Calibration and Coastal Water Atmospheric Correction for Satellite HJ-1A

For the purpose of quantitative inversion in coastal waters by using the CCD data of Satellite HJ-1A,the precision of radiance calibration coefficients of the CCD mounted on Satellite HJ-1A was validated and a cross radiance calibration was performed based on the data from Landsat-5 TM.And then,an inversion was made of the reflectivity of coastal waters on the basis of all these data.By comparing the results from the inversion and those from the measurements,it has been found that the cross radiance calibration for the CCT data of Satellite HJ-1A can,to a certain extent,improve the precision of the inversion of the reflectivity of coastal waters.These results indicate that the onboard radiance calibration coefficients of the CCD images on Satellite HJ-1A are not precise so enough that the cross radiance calibration should be also applied when the CCD data from Satellite HJ-1A are used to carry out the quantitative inversion in the coastal waters.