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Proceedings Paper

On-orbit characterization of blackbody emissivity and spectrometer instrument line-shape using quantum cascade laser based reflectometry
Author(s): P. Jonathan Gero; John A. Dykema; James G. Anderson; Stephen S. Leroy
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Paper Abstract

We present a method to characterize the emissivity of a spaceborne blackbody and the instrument line-shape (ILS) of a spectrometer using a quantum cascade laser (QCL) based reflectometer. QCLs allow the realization of on-orbit reflectometry that directly observes blackbody surface properties. We present experimental data verifying that the QCL reflected radiance signal can be measured by an Earth-observing spectrometer. The QCL can also be used to realize a monochromatic, spatially uniform source of infrared radiation to measure the spectrometer's ILS, which can be inverted to obtain diagnostic information about the integrity of the detector and nonlinearities in the detector signal-chain.

Paper Details

Date Published: 20 August 2008
PDF: 11 pages
Proc. SPIE 7081, Earth Observing Systems XIII, 70810Q (20 August 2008); doi: 10.1117/12.795987
Show Author Affiliations
P. Jonathan Gero, Harvard Univ. (United States)
John A. Dykema, Harvard Univ. (United States)
James G. Anderson, Harvard Univ. (United States)
Stephen S. Leroy, Harvard Univ. (United States)


Published in SPIE Proceedings Vol. 7081:
Earth Observing Systems XIII
James J. Butler; Jack Xiong, Editor(s)

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