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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 24 — Aug. 20, 2014
  • pp: 5344–5352

Impacts of dichroic prism coatings on radiometry of the airborne imaging spectrometer APEX

A. Hueni, D. Schlaepfer, M. Jehle, and M. Schaepman  »View Author Affiliations


Applied Optics, Vol. 53, Issue 24, pp. 5344-5352 (2014)
http://dx.doi.org/10.1364/AO.53.005344


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Abstract

The generation of well-calibrated radiometric measurements from imaging spectrometer data requires careful consideration of all influencing factors, as well as an instrument calibration based on a detailed sensor model. Deviations of ambient parameters (i.e., pressure, humidity, temperature) from standard laboratory conditions during airborne operations can lead to biases that should be accounted for and properly compensated by using dedicated instrument models. This study introduces a model for the airborne imaging spectrometer airborne prism experiment (APEX), describing the impact of spectral shifts as well as polarization effects on the radiometric system response due to changing ambient parameters. Key issues are related to changing properties of the dichroic coating applied to the dispersing elements within the optical path. We present a model based on discrete numerical simulations. With the improved modeling approach, we predict radiometric biases with an root mean square error (RMSE) below 1%, leading to a substantial improvement of radiometric stability and predictability of system behavior.

© 2014 Optical Society of America

OCIS Codes
(050.1930) Diffraction and gratings : Dichroism
(110.0110) Imaging systems : Imaging systems
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(300.0300) Spectroscopy : Spectroscopy
(150.1488) Machine vision : Calibration

ToC Category:
Spectroscopy

History
Original Manuscript: February 27, 2014
Revised Manuscript: June 20, 2014
Manuscript Accepted: July 2, 2014
Published: August 13, 2014

Citation
A. Hueni, D. Schlaepfer, M. Jehle, and M. Schaepman, "Impacts of dichroic prism coatings on radiometry of the airborne imaging spectrometer APEX," Appl. Opt. 53, 5344-5352 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-24-5344

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