A Study on Effect of the Solar Elevation on the Ship IR Signature

J. Ocean Eng. Technol. 2010;24(3):38-45.

Kim Yoon-Sik

Marine Transportation Research Department MOERI/KORDI

태양고각 변화에 따른 함정 적외선신호에 관한 연구

김윤식

한국해양연구원 해양운송연구부

Keywords: Infrared (IR) signature, Stealth technology, Contrast radiant intensity, Solar elevation, ShipIR/NTCS, Background condition

핵심용어: 적외선 신호, 스텔스 기술, 대비복사강도, 태양고각, 환경조건

Abstract

A study on the infrared signature of a naval ship by the solar elevation was performed using the well known IR signature analysis software, ShipIR/NTCS. The contrast radiant intensity of a ship against the Eastern Sea backgroundfrom sunrise to noon was investigated. Monthly averaged climate data for both January and July were applied to investigate the seasonal change in the signature. A study on the signature for different ship speeds was also carried out. Simulation results showed that the maximum signature in both wave-bands for a sea-level observer occurred at around 25~35 degrees of solar elevation and was highly dependent on the ship geometry rather than the solar irradiance.