Fig. 1. Schematic diagram of attitude sensitivity principle of infrared earth sensor (a) the geometric position relationship between, (b) the principle of attitude sensitivity infrared earth sensor and the earth space

Fig. 2. Schematic diagram of infrared earth sensor optical system

Fig. 3. Modulation transfer function

Fig. 4. Radial energy distribution curve

Fig. 5. Uniformity curve of image surface illuminance

Fig. 6. Working principle diagram of calibration components

Fig. 7. Background images at different temperatures (a) 24.83 ℃，(b) 27.62 ℃，(c) 28.33 ℃，(d) 30.4 ℃

Fig. 8. Corrected images at different temperatures (a) 27.62 ℃, (b) 28.33 ℃, (c) 30.4 ℃

Fig. 9. Image of the on-orbit detector after correction

Fig. 10. Image of the ground detector after correction