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Aircraft visibility in view from below in the long-wave infrared band using infrared cross section
Journal
Applied Optics
ISSN
1559128X
Date Issued
2022-06-01
Author(s)
Mahulikar, Shripad P.
Rastogi, Pallavi
Bhatt, Ashish
Valodi, Shubendu P.
Abstract
Aircraft low observables' features are crucial in the long-wave infrared (LW-IR) band, due to imaging sensors used in IR search and track and in the latest generation of IR-guided missiles. Earthshine irradiance on the aircraft bottom surface is an important source; hence, it is derived using data for atmospheric transmission. Emission due to skin-friction heating (important at high "bot) and earthshine reflection (important at low "bot) are compared by a dimensionless ratio for different bottom surface emissivities ("bot). The infrared cross section of aircraft in direct view from below is obtained in the LW-IR band, which shows that aircraft is seen also due to negative contrast.