Calibration algorithm for Fourier transform spectrometer with thermal instabilities

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Authors
  1. Turbide, S.
  2. Smithson, T.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN)
Abstract
Complex domain calibration is an efficient method to correct the amplitude and phase of a spectrum obtained from a Fourier transform spectrometer. This method is, however, not directly applicable in the occurrence of a zero path difference (ZPD) shift between a scene interferogram and calibration blackbody interferograms. This situation is likely to happen for a system with thermal instabilities. It is found that a ZPD shift smaller than 1 sampling point can cause a large disagreement between the spectra evaluated from the two interferometer sweep directions. We have developed an algorithm for a complex calibration in the presence of ZPD shifts. The restricting aspect of the real-time capability is taken into account.
Report Number
DRDC-VALCARTIER-SL-2010-210 — Scientific Literature
Date of publication
01 Jun 2010
Number of Pages
7
DSTKIM No
CA035011
CANDIS No
534613
Format(s):
Electronic Document(PDF)

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