Radiometric Cross-calibration of ZY3 Satellite with GF1 PMS/WFV and Landsat-8 OLI

In this paper, radiometric cross-calibration of Ziyuan-3 Satellite was conducted at the homogeneous field test site in August 2015, using GF1 satellite and Landsat-8. The test site was chosen at Dunhuang site, which has been used for vicarious calibration for Chinese Satellite since 1990s. The radiometric cross-calibration of ZY3, GF1 and Landsat-8 was performed by the simultaneously observation of the three satellites on August 15, 2015. In this study, three calibration coefficients from various methods were compared and analyzed. This paper reveals that the cross-calibration of the ZY3 satellite using GF1 PMS sensor is better than using GF1 WFV sensor. The best result is the cross-calibration coefficient using Landsat-8 OLI, which is consistent with the calibration coefficient of the reflectance-based vicarious calibration method in Dunhuang. The validation results show the accuracy of the cross-calibration for ZY3 sensor using GF1 PMS and Landsat-8 OLI is less than 4% and 2%,respectively. This study can supply reference to the radiometric cross-calibration of Chinese satellite senor, and the results suggest that the radiometric cross-calibration coefficients can be useful for maintaining the quantitative application.