Simulation of infrared radiation characteristics of ballistic missiles in all stages based on all-directional detectors

The infrared radiation characteristics of ballistic missile were of great significance to the penetration capability an d detection technology. Based on the Trident II ICBM, the infrared radiation characteristics of the ballistic missile in the medium-wave infrared radiation of the boost, middle and re-entry range. The results show that the total radiation intensity of medium wave in the boost section was 3.23×10⁵W/sr, the particle radiation contribution was 77.84%, and the contribution of gas was 21.22%. Attention must be paid to the influence of solid particle and gas radiation; the total radiation intensity of long wave was weaker than the medium wave, 1.44×10⁵W/sr. The particle radiation contribution was higher than the middle wave at 91.38%. The transmittance of long wave radiation in the atmosphere was significantly higher than that of medium wave; the long wave radiation was lower than the middle wave in the order of 1~10²; the highest temperature of the head was about 2333K, the total radiation intensity of medium wave was equal to 10³, with high military application value for the improvement of ballistic missile infrared stealth performance and optimization of infrared detection technology.