Share Email Print
cover

Proceedings Paper

Precise prelaunch radiometric calibration of VIIRs
Author(s): Leonid Mikheenko; Volodymyr Borovytsky; Oleksii Hudz
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The paper presents the new approach that includes technique, scheme and instruments for precise calibration of space-borne and airborne visible infrared imaging radiometers (VIIRs). The key component of this technique is the precise uniform light source based on optically-interconnected integrating spheres. The light source contains several (5…11) primary integrating spheres of small diameters which are installed on a secondary integrating sphere of bigger diameter. The initial light sources – halogen lamps or light emitted diodes are installed inside the primary integrating spheres. These spheres are mounted on the secondary integrating sphere. The radiation comes from the primary integrating spheres to the secondary one through diaphragms which diameters can be varied. The secondary integrating sphere has an output aperture where uniform radiance emits. As a result the output radiance can be varied in extremely wide range – up to 800 W/(st·m2) with dynamic range 1 000 000 – without any change of spectral characteristics. Non-uniformity of the radiance distribution throughout the output aperture can be smaller 0.5 % because the secondary integrating sphere is illuminated uniformly and it does not contain lamps inside. The paper discusses the requirements to calibration system, the application of this light source in calibration procedures, metrological aspects of radiometric calibration.

Paper Details

Date Published: 8 September 2015
PDF: 9 pages
Proc. SPIE 9607, Earth Observing Systems XX, 960726 (8 September 2015); doi: 10.1117/12.2187039
Show Author Affiliations
Leonid Mikheenko, National Technical Univ. of Ukraine (Ukraine)
Volodymyr Borovytsky, National Technical Univ. of Ukraine (Ukraine)
Oleksii Hudz, National Technical Univ. of Ukraine (Ukraine)


Published in SPIE Proceedings Vol. 9607:
Earth Observing Systems XX
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

© SPIE. Terms of Use
Back to Top