Shock-layer radiance effect on IR waveband selection considerations from molecular radiometry perspective

Mingqi Pang; Zelin Shi; Haizheng Liu; Daijun Zhang

doi:10.1117/12.2662713

12 April 2023 Shock-layer radiance effect on IR waveband selection considerations from molecular radiometry perspective

Mingqi Pang, Zelin Shi, Haizheng Liu, Daijun Zhang

Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 125652P (2023) https://doi.org/10.1117/12.2662713
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

With the increase of flight speed, infrared (IR) seeker may be seriously affected by high temperature shock-layer in front of dome. Shock-layer radiance is produced by molecular processes and has implications for sensor waveband selection. This paper examines the impacts of high temperature shock-layer IR radiance from a molecular radiometry point of view. We derived the mathematical expressions of rotational quantum number of maximum intensity and the corresponding wavenumber of P and R branch. The theoretical calculation and the simulation based on HITRAN database are conducted. Results show that with the increasing of temperature, the rotational quantum number of maximum intensity will be larger. Ultimately, the wavenumber of P and R branch moves towards long wavelength and short wavelength direction respectively. The conclusions subserve to select sensor waveband.

Citation Download Citation

Mingqi Pang, Zelin Shi, Haizheng Liu, and Daijun Zhang "Shock-layer radiance effect on IR waveband selection considerations from molecular radiometry perspective", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 125652P (12 April 2023); https://doi.org/10.1117/12.2662713

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KEYWORDS

Infrared radiation

Radiometry

Sensors

Imaging infrared seeker

Databases

Molecules

Infrared sensors

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