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http://dx.doi.org/10.5139/JKSAS.2010.38.6.577

Infrared Signature Analysis on a Flat Plate by Using the Spectral BRDF Data  

Choi, Jun-Hyuk (중앙대학교 기계공학부)
Kim, Dong-Geon (중앙대학교 기계공학부)
Kim, Jung-Ho (국방과학연구소)
Kim, Tae-Kuk (중앙대학교 기계공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.38, no.6, 2010 , pp. 577-585 More about this Journal
Abstract
This paper is a part of developing a software that predicts the infrared signal emitted from a ground object by considering solar irradiation. The radiance emitted from a surface can be calculated by using the temperature and optical characteristics of the surface object. The bidirectional reflectance distribution function (BRDF) is defined as the ratio of reflected radiance to incident irradiance. It is a very important surface reflection property that decides the reflected radiance from the object. In this paper, the spectral radiance received by a remote sensor over the mid-wave infrared(MWIR), and the long-wave infrared(LWIR) regions are computed and compared each other for several different materials. The results show that the optical surface properties such as the BRDF and the emissivity of the object surface can play a major role in generating the infrared signatures of various objects, and the largest infrared signal may reach up to 10 times the smallest one when the infrared signals obtained from a flat plate with different surface conditions under the sun light.
Keywords
BRDF; Solar irradiation; IR Radiance; IR Stealth;
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