Space-based missile warning technology based on fine spectrum of potassium atoms in exhaust plumes

Sufeng Wang; Kujun Wu; Yutao Feng; Chenguang Chang; Jianan Dang; Bingliang Hu

doi:10.1117/12.2574904

5 November 2020 Space-based missile warning technology based on fine spectrum of potassium atoms in exhaust plumes

Sufeng Wang, Kujun Wu, Yutao Feng, Chenguang Chang, Jianan Dang, Bingliang Hu

Proceedings Volume 11566, AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics; 1156607 (2020) https://doi.org/10.1117/12.2574904
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

The main propose of this paper is to discuss the possibility of a space-based early warning technology for missiles in boost phase based on the near-infrared fine spectrum of potassium atoms in the exhaust plume. Emission transfer link from the exhaust plume to the detector is established in combination with the observation model of satellite and target on the ground. Line-by-line integral method is used to calculate the characteristic spectrum of potassium atoms. The result shows the potassium line have high spectral emissivity and narrow bandwidth. The analyses on the atmospheric transmission and background radiation indicate that the atmospheric transmission of the 769.896 nm potassium line is higher than that of the 766.490 nm potassium line which lies on top of an O₂ line, and the irradiance of the 769.896 nm line is stronger than that of background and the 766.490 nm line. Considering atmospheric transmission and background radiation, it is suitable to choose the 769.896 nm line to detect the exhaust plume of the missile. According to the characteristic of potassium atoms emission line with narrow bandwidth, a 1.2 nm wide filter centered on 770nm is used to extract target signal. The maximum detection range and other indexes are evaluated. The simulation results show that ultra-narrow band filter can achieve a large degree of background suppression, and the system performance indexes meet the detection requirements. Therefore, it is feasible that missile detection can be realized by using near-infrared fine spectrum of potassium atoms.

Citation Download Citation

Sufeng Wang, Kujun Wu, Yutao Feng, Chenguang Chang, Jianan Dang, and Bingliang Hu "Space-based missile warning technology based on fine spectrum of potassium atoms in exhaust plumes", Proc. SPIE 11566, AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics, 1156607 (5 November 2020); https://doi.org/10.1117/12.2574904

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KEYWORDS

Potassium

Missiles

Signal to noise ratio

Sensors

Absorption

Optical filters

Target detection

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