On-orbit characterization of blackbody emissivity and spectrometer instrument line-shape using quantum cascade laser based reflectometry

P. Jonathan Gero; John A. Dykema; James G. Anderson; Stephen S. Leroy

doi:10.1117/12.795987

20 August 2008 On-orbit characterization of blackbody emissivity and spectrometer instrument line-shape using quantum cascade laser based reflectometry

P. Jonathan Gero, John A. Dykema, James G. Anderson, Stephen S. Leroy

Author Affiliations +

Proceedings Volume 7081, Earth Observing Systems XIII; 70810Q (2008) https://doi.org/10.1117/12.795987
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

P. Jonathan Gero, John A. Dykema, James G. Anderson, and Stephen S. Leroy "On-orbit characterization of blackbody emissivity and spectrometer instrument line-shape using quantum cascade laser based reflectometry", Proc. SPIE 7081, Earth Observing Systems XIII, 70810Q (20 August 2008); https://doi.org/10.1117/12.795987

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