Radiometric Cross-Calibration of GF-6/WFV Sensor Using MODIS Images With Different BRDF Models

The wide field of view (WFV) imaging system the GaoFen-6 (GF-6) satellite processes four popular spectral bands [blue, green, red, and near-infrared (NIR)] new (costal, yellow, two red edges). However, corresponding reference for these eight from one sensor are insufficient in cross-calibration process WFV; therefore, current methods should be improved. To address this problem, Moderate-Resolution Imaging Spectroradiometer (MODIS), which has high radiometric performance with aid an onboard calibration system, is used as a sensor, using top atmosphere (TOA) bottom (BOA) bidirectional reflectance distribution function (BRDF) models developed compared. results reveal that BOA BRDF model can obtain higher consistency official coefficients (OCCs) compared TOA model. In addition, after various influencing factors comprehensively analyzed, band adjustment factor (SBAF) correction shortwave infrared (SWIR) neglected; moreover, by five (blue, NIR, SWIR) MODIS cubic polynomial interpolation method provide optimal schemes WFV sensor. total uncertainties proposed less than 5.73% 6.32%, respectively.