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http://dx.doi.org/10.20910/JASE.2020.14.3.42

Numerical Investigation of Blackbody Design for Spaceborne Image Sensor Non-uniformity Characteristic Calibration  

Kim, Hye-In (Department of Aerospace Engineering, Chosun University)
Choi, Pil-Gyeong (Mechanical Design Team, Hanwha Systems)
Jo, Mun-Shin (Mechanical Design Team, Hanwha Systems)
Oh, Hyun-Ung (Department of Aerospace Engineering, Chosun University)
Publication Information
Journal of Aerospace System Engineering / v.14, no.3, 2020 , pp. 42-50 More about this Journal
Abstract
For calibration of the non-uniformity characteristics of the space-borne infrared (IR) sensor, a black body system shall provide estimated representative surface temperature at various reference temperatures by using the limited number of temperature sensors. The black body system proposed in this study has an I/F flange integrated on the rear side of the black body for installation of the heat pipe to transfer the residual heat after the black body heat-up. This design allows for obtaining a circular symmetric thermal contour of black body with low surface temperature gradient, leading to much easier representative temperature estimation. Additionally, this provides mechanically stable thermal I/F under launch and on-orbit environmental loads, as well as allowing a fail safe design by using the two heat pipes. Also, a highly accurate temperature estimation is possible even if the temperature sensors are attached on the surface on the rear side of the black body. The effectiveness of the thermal design of the proposed black body has been verified through the on-orbit thermal analysis. Based on the results, the representative surface temperature was estimated according to the number and position of the temperature sensors.
Keywords
Blackbody; Infrared Sensor; Non-uniformity; Estimation Accuracy; Thermal Analysis;
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Times Cited By KSCI : 5  (Citation Analysis)
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