Study on the Seasonal IR Signature Characteristics of a Naval Ship with Plume Gas Effect

Han, Kuk-Il; Kim, Dong-Geon; Choi, Jun-Hyuk; Kim, Tae-Kuk

doi:2013.16.4.545

J. KIMS Technol > Volume 16(4); 2013 > Article

Journal of the Korea Institute of Military Science and Technology 2013;16(4):545-552.
DOI: https://doi.org/10.9766/KIMST.2013.16.4.545

Study on the Seasonal IR Signature Characteristics of a Naval Ship with Plume Gas Effect

Kuk-Il Han, Dong-Geon Kim, Jun-Hyuk Choi, Tae-Kuk Kim

Chung-Ang University

배기가스를 고려한 함정의 계절별 적외선 신호 특성에 대한 연구

한국일, 김동건, 최준혁, 김태국

중앙대학교

Abstract

This paper is a part of developing a computer code that can be used to generate IR images of a naval ship by considering the emitted and reflected infrared signals. The spectral radiance received by an IR sensor is consisted of the self-emitted component from the ship surface, the reflected component of the solar/sky irradiance at the ship surface, the emitted radiance from the ship surface and the exhaust plume gas, and the scattered radiance by the atmosphere. The plume gas radiance occupies a large part of the emitted radiance from a naval ship in operation. Therefore plume gas radiance must be taken into account when calculating the radiance from a naval ship for reliable IR images. In this paper, IR images of a naval ship with the exhaust gas effect in various environmental conditions are generated by using an exhaust gas prediction model called the JPL model. The contrast radiance (CR) values of the IR images are calculated to analyze the effect of the exhaust gas radiance quantitatively. The results obtained by quantitative analysis show that the IR signatures with the exhaust plume gas are 2.26 times larger than those neglecting the plume gas effect. The effect of the exhaust plume gas is shown to be more eminent in winter than in summer in the daytime.

Key Words: IR Signal, Exhaust Plume Gas, Naval Ship