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• W2321946917 abstract "This paper investigates the thermodynamics of objects, and the ability of an Infra-Red (IR) sensor to detect them from space or from other aeronautical platform. Presenting a general thermodynamic model that describes the temporal behavior of objects does the investigation. Then, the thermodynamic behavior is translated into a radiometric signature and detection performances of a general IR scanning sensor are evaluated. Computer simulations validate the theoretical investigation. A THERMO-RADIOMETRIC MODEL FOR CHARACTERIZING THE INFRA-RED THERMAL-TEMPORAL BEHAVIOR OF OBJECTS OBSERVED FROM SPACE ,0) (2) Zeev Zaievsky^ ' and Ephraim Bashan (1) Faculty of Engineering, Tel-Aviv University, 69978 Tel-Aviv, Israel ^ Aeronautical Systems Engineering, 76703 Rehovot, Israel Introduction In many aeronautic applications an Infra-Red (IR) sensor is placed on a platform (such as an airplane or a satellite) and aims to observe far hot objects. This paper treats the issue of thermodynamics of objects, and the ability of an Infra-Red (IR) sensor to detect them. The first part presents a general thermodynamic model that describes the temporal behavior of an object. The model is based on the three basic ways of heat exchange: radiation, conduction and convection. It takes into account various physical parameters such as the period of the day, the emissivity of various components, the wind velocity, the dimensions and the position of the object etc. In the second part of the paper the thermodynamic behavior is translated into a radiometric signature and detection performances of a general IR scanning sensor are evaluated. The detection performance estimation model takes into account not only the noises created due to the sensor or its platform but also due to the spatial statistics of the background on which the object is positioned. This spatial statistics is approximated by a first order Markoff process. Copyright © 2000 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. The non-linear differential equations are solved using the explicit Runge-Kutta numeric approach. Computer simulations validate the presented theory. The following sections present the used thermodynamic and radiometric models and then validate them with several simulations." @default.
• W2321946917 created "2016-06-24" @default.
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• W2321946917 date "2000-08-22" @default.
• W2321946917 modified "2023-09-26" @default.
• W2321946917 title "A thermo-radiometric model for characterizing the infra-red thermal-temporal behavior of objects observed from space" @default.
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• W2321946917 doi "https://doi.org/10.2514/6.2000-5219" @default.
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