Assessment and Correction of the On-Orbit Radiometric Calibration for FY-3D Mersi-2 Thermal Infrared Channels

• Published in: IEEE International Geoscience and Remote Sensing Symposium proceedings pp. 7555 - 7558
• Main Authors: Zou, Yi, Jiang, Geng-Ming, Xin, Yi-Chun
• Format: Conference Proceeding
• Language: English
• Published: IEEE 17.07.2022
• Subjects: Calibration; double difference method; FY-3D MERSI-2; Image resolution; Radiometric calibration; Radiometry; Satellite broadcasting; Solid modeling; the Advanced Himawari Imager (AHI); thermal infrared channels; Three-dimensional displays
• ISSN: 2153-7003
• DOI: 10.1109/IGARSS46834.2022.9884818

Accurate on-orbit radiometric calibration is the fundamental to quantitative remote sensing. Based on the thermal infrared radiative transfer model and Double Difference (DD) method, the on-orbit radiometric calibration in the thermal infrared channels of the advanced MEdium Resolution Spectral Imager (MERSI-2) on Chinese Fengyun 3D (FY-3D) are evaluated against the channels of Advanced Himawari Imager (AHI) on the Himawari 8 satellite. The results shows that the on-orbit radiometric calibration of FY-3D MERSI-2 channel 25 (12.0 µm) is quite consistent with the AHI channel 15, whereas the radiometric calibration biases (the mean of the double differences ± standard deviation) in FY-3D MERSI-2 channels 23 (8.55 µm) and 24 (10.8 µm) are −0.17±0.26 K and −0.28±0.30 K, respectively. The on-orbit radiometric calibration biases are finally corrected by linear fits on the matching observations.