Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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ANALYSIS OF IRSIGNAL CHARACTERISTICS OF A SHIP FOR NON-UNIFORM ATMOSPHERIC CONDITIONS

비균일 대기상태를 고려한 함정의 적외선 신호 특성 분석

  • Choi, J.H. (Dept. of Mechanical Engineering, Chung-Ang Univ.) ;
  • Kim, D.H. (Dept. of Mechanical Engineering, Chung-Ang Univ.) ;
  • Han, K.I. (Dept. of Mechanical Engineering, Chung-Ang Univ.) ;
  • Ha, N.K. (Seeker & EO/IR R&D Lab, LIG Nex1 Co., Ltd.) ;
  • Jang, H.S. (Seeker & EO/IR R&D Lab, LIG Nex1 Co., Ltd.) ;
  • Lee, S.H. (Seeker & EO/IR R&D Lab, LIG Nex1 Co., Ltd.) ;
  • Kim, D.G. (M&S R&D Lab., LIGNex1 Co., Ltd.) ;
  • Kim, T.K. (Dept. of Mechanical Engineering, Chung-Ang Univ.)
  • 최준혁 (중앙대학교 기계공학부) ;
  • 김도휘 (중앙대학교 기계공학부) ;
  • 한국일 (중앙대학교 기계공학부) ;
  • 하남구 (LIG 넥스원(주) 광학연구센터) ;
  • 장현성 (LIG 넥스원(주) 광학연구센터) ;
  • 이승하 (LIG 넥스원(주) 광학연구센터) ;
  • 김동건 (LIG넥스원(주) M&S연구센터) ;
  • 김태국 (중앙대학교 기계공학부)
  • Received : 2016.12.13
  • Accepted : 2017.02.08
  • Published : 2017.03.31
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Abstract

The IR signal entering into a sensor is composed of the following components: the self-emitted component directly from the object surface, the reflected components of the solar and sky irradiance at the object surface, and the scattered component by the atmosphere without reference to any object surfaces. The self-emitted and reflected components from the object can be lowered by the atmospheric layer between the object and the IR sensor. The principle factors influencing the atmospheric transmittance are the air temperature, the relative humidity and the observation distance. Previous studies on IR signal transmission through the atmosphere are focused on uniform atmospheric conditions and the non-uniform nature of the atmosphere was not properly treated in modeling. In this study, we use the local atmospheric transmittance to simulate the non-uniform atmosphere in analyzing the IR signal from the object surface. The results show that the nonuniform analysis of the atmosphere becomes more important as the wavelength of IR signal increases.

Keywords

References

  1. 2010, Choi, J.H., Kim, J.H., Jung, I.H., Lee, P.H. and Kim, T.K., "Study on IR Signature Characteristics for different Transmittaance over the Korean South Sea during Summer and Winter Seasons," Journal of the Korea Institute of Military Science and Technology, Vol.13, No.2, pp.320-327.
  2. 2010, Choi, J.H., Shin, J.M., Kim, J.H. and Kim, T.K., "Study on Infrared Image Generation for Different Surface Condtions with Different Sensor Resolutions," Journal of the Society of Navel Architects of Korea, Vol.47, No.1, pp.631-681.
  3. 2013, Han, K.I., Kim, D.G., Choi, J.H. and Kim, T.K., "Study on the Seasonal IR Signature Characteristics of a Naval Ship with Plume Gas Effect," Journal of the Korea Institute of Military Science and Technology, Vol.16, No.4, pp.545-552. https://doi.org/10.9766/KIMST.2013.16.4.545
  4. 2012, Kim, D.G., Choi, J.H., Kil, T.J., Kim, J.H. and Kim, T.K., "Experimental Study on Surface Temperature Variation Characteristics of Rectangular Parallelepipeds Constructed by Different Materials for Varying Meteorological Condtions," Journal of the Korea Institute of Military Science and Technology, Vol.15, No.2, pp.208-214. https://doi.org/10.9766/KIMST.2012.15.2.208
  5. 2010, Choi, J.H., Kim, J.H., Jung, I.H., Lee, P.H. and Kim, T.K., "Study on IR Signature Characteristics for different Transmittance over the Korean South Sea during Summer and Winter Seasons" Journal of the Korea Institute of Military Science and Technology, Vol.13, No.2, pp.320-327.
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  8. 2015, Han, K.I., Kim, D.G., Choi, J.H. and Kim, T.K., "Application and validation of a S/W developed for IR signal simulation by using the measured data from a moving test ship," Proc. SPIE 9452, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXVI.
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