A Responsivity-based Criterion for Accurate Calibration of FTIR Emission Spectra: Identification of In-band Low-responsivity Wavenumbers

Authors

Penny M. Rowe, Department of Geography, University of Idaho, 875 Perimeter Drive, Moscow, Idaho 83843, USA
Steven P. Neshyba, University of Puget SoundFollow
Christopher J. Cox, Department of Geography, University of Idaho, 875 Perimeter Drive, Moscow, Idaho 83843, USA
Von P. Walden, Department of Geography, University of Idaho, 875 Perimeter Drive, Moscow, Idaho 83843, USA

Document Type

Article

Publication Date

3-2011

Publication Title

Optics Express

Department

Chemistry

Abstract

Spectra measured by remote-sensing Fourier transform infrared spectrometers are often calibrated using two calibration sources. At wavenumbers where the absorption coefficient is large, air within the optical path of the instrument can absorb most calibration-source signal, resulting in extreme errors. In this paper, a criterion in terms of the instrument responsivity is used to identify such wavenumbers within the instrument bandwidth of two remote-sensing Fourier transform infrared spectrometers. Wavenumbers identified by the criterion are found to be correlated with strong absorption line-centers of water vapor. Advantages of using a responsivity-based criterion are demonstrated.

Volume

19

Issue

7

pp.

5930-5941

ISSN

1094-4087

DOI

http://dx.doi.org/10.1364/OE.19.005930

WorldCat Link

http://worldcat.org/oclc/4795864159

Provider Link

http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-19-7-5930

Citation

Rowe, P. M., Neshyba, S. P., Cox, C. J., & Walden, V. P. (2011). A responsivity-based criterion for accurate calibration of FTIR emission spectra: identification of in-band low-responsivity wavenumbers. Optics Express, 19, 7, 5930-41.