Title

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

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