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Proceedings Paper • Open Access

Compact blackbody calibration sources for in-flight calibration of spaceborne infrared instruments
Author(s): S. Scheiding; H. Driescher; I. Walter; K. Hanbuch; M. Paul; M. Hartmann; M. Scheiding

Paper Abstract

High-emissivity blackbodies are mandatory as calibration sources in infrared radiometers. Besides the requirements on the high spectral emissivity and low reflectance, constraints regarding energy consumption, installation space and mass must be considered during instrument design. Cavity radiators provide an outstanding spectral emissivity to the price of installation space and mass of the calibration source. Surface radiation sources are mainly limited by the spectral emissivity of the functional coating and the homogeneity of the temperature distribution. The effective emissivity of a “black” surface can be optimized, by structuring the substrate with the aim to enlarge the ratio of the surface to its projection.

Based on the experiences of the Mercury Radiometer and Thermal Infrared Spectrometer (MERTIS) calibration source MBB3, the results of the surface structuring on the effective emissivity are described analytically and compared to the experimental performance. Different geometries are analyzed and the production methods are discussed. The high-emissivity temperature calibration source features values of 0.99 for wavelength from 5 μm to 10 μm and emissivity larger than 0.95 for the spectral range from 10 μm to 40 μm.

Paper Details

Date Published: 17 November 2017
PDF: 9 pages
Proc. SPIE 10563, International Conference on Space Optics — ICSO 2014, 105635P (17 November 2017); doi: 10.1117/12.2304132
Show Author Affiliations
S. Scheiding, Astro- und Feinwerktechnik Adlershof GmbH (Germany)
H. Driescher, Astro- und Feinwerktechnik Adlershof GmbH (Germany)
I. Walter, German Aerospace Ctr. e.V. (Germany)
K. Hanbuch, Astro- und Feinwerktechnik Adlershof GmbH (Germany)
M. Paul, Astro- und Feinwerktechnik Adlershof GmbH (Germany)
M. Hartmann, Astro- und Feinwerktechnik Adlershof GmbH (Germany)
M. Scheiding, Astro- und Feinwerktechnik Adlershof GmbH (Germany)


Published in SPIE Proceedings Vol. 10563:
International Conference on Space Optics — ICSO 2014
Zoran Sodnik; Bruno Cugny; Nikos Karafolas, Editor(s)

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