A Novel Radiometric Cross-Calibration of GF-6/WFV with MODIS at the Dunhuang Radiometric Calibration Site

Jie Han, Zui Tao, Yong Xie, Huina Li, Qiyue Liu, Xiaoguo Guan
2020 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
To obtain more abundant target information for vegetation remote sensing research, the wide field of view (WFV) of the GaoFen-6 (GF-6) satellite utilizes eight bands, including four new bands. Unfortunately, it finds the unavailable reference bands from well-calibrated sensors to implement radiometric cross-calibration of the WFV sensor for these new bands, which severely affects the radiometric quality estimation and the radiometric degradation detection of WFV. Therefore, taking the Dunhuang
more » ... aking the Dunhuang radiometric calibration site (DRCS) in China as the radiometric transfer platform and treating the moderate-resolution imaging spectroradiometer as a reference sensor, a novel radiometric cross-calibration method for WFV is proposed. The validation results show that compared with the official calibration coefficients (OCCs) published by the China centre for resources satellite data and application (CRESDA), the proposed method can obtain reliable radiometric cross-calibration results for each band even without available corresponding reference bands. Moreover, the influences of the interpolation method and the spectral band adjustment factor (SBAF) correction on the calibration results are discussed. The total radiometric cross-calibration uncertainty is less than 4.33%. Index Terms-GaoFen-6 (GF-6), moderate-resolution imaging spectroradiometer (MODIS), cross-calibration, validation and evaluation. Jie Han received the B.S. and M.S. degrees in science and technology of surveying and mapping from the He is currently a Lecturer with the School of Urban and Environment Sciences, Xuchang University, Electrical and Mechanical Engineering (Engineering Training Center), Xuchang University, Xuchang, China. Her main research interest includes remote sensing image processing in the visible/near-infrared. Qiyue Liu received the B.S. degree in geographic information system from Hengyang Normal University, Hengyang, China, in 2008 and the M.S. degree in cartography and geography information system from Henan
doi:10.1109/jstars.2020.3046738 fatcat:cbkbipgkefgx5lvp4vsfwo2y5q