Fig. 1. Effective temperature at different times and its corresponding spectral characteristics

Fig. 2. Curve of thermal radiation power versus time and its normalization curve under certain conditions

Fig. 3. Variation characteristics of cumulative thermal radiation energy with spatial transmission distance at different times

Fig. 4. Cumulative energy distribution of thermal radiation at different transmission distances at 3s (each distance with its own normalized chromatogram)

Fig. 5. Variation characteristics of thermal radiation energy rate with space transmission distance at different time

Fig. 6. Average cumulative energy distribution and proportion of space thermal radiation in different wavebands at 3 s

Fig. 7. Accumulated energy and proportion of space thermal radiation in different time and wave bands at transmission distance 1 km

Fig. 8. Variation characteristics of thermal radiation energy rate with transmission distance at different time bands

Fig. 9. Variation characteristics of the ratio of thermal radiation energy rate in infrared and ultraviolet bands with time at different distances

Fig. 10. Thermal radiation data of the two test points