Fig. 1. Radiometric calibration curve and schematic diagram of radiance-brightness temperature search. (a) Radiometric calibration curve; (b) schematic diagram of radiance-brightness temperature search

Fig. 2. RSR of each pixel of AGRI. (a) Band9; (b) Band10; (c) Band14

Fig. 3. Response of different pixels to imaging of target with absolute blackbody spectrum and results of brightness temperature inversion. (a) Response of different pixels; (b) results of brightness temperature inversion

Fig. 4. Some examples of simulated radiation spectra of different observation targets. (a) Cloud-free ground; (b) cloud targets

Fig. 5. Average spectral radiance difference and inverted brightness temperature difference of each pixel of AGRI calculated based on simulated Earth scene radiation spectra. (a)(d) Band9; (b)(e) Band10; (c)(f) Band14

Fig. 6. Schematic diagram of relative radiometric calibration

Fig. 7. Full disk images and local enlarged images before correction at 5:00:00, March 15, 2019. (a) Band9; (b) Band10; (c) Band14

Fig. 8. Full disk images and local enlarged images after correction at 5:00:00, March 15, 2019. (a) Band9; (b) Band10; (c) Band14

Fig. 9. Mean curves of row of each channel image. (a) Band9; (b) Band10; (c) Band14

Fig. 10. Streaking metric curves of each channel image. (a) Band9; (b) Band10; (c) Band14