Open AccessParametrization of optimum filter passbands for rotational Raman temperature measurements
Author(s) -
Eva Hammann,
Andreas Behrendt
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.030767
Subject(s) - parametrization (atmospheric modeling) , passband , filter (signal processing) , optics , range (aeronautics) , physics , computational physics , temperature control , temperature measurement , materials science , band pass filter , computer science , quantum mechanics , composite material , computer vision , radiative transfer , thermodynamics
We revisit the methodology of rotational Raman temperature measurements covering both lidar and non-range-resolved measurements, e.g., for aircraft control. The results of detailed optimization calculations are presented for the commonly used extraction of signals from the anti-Stokes branch. Different background conditions and realistic shapes of the filter transmission curves are taken into account. Practical uncertainties of the central passbands and widths are discussed. We found a simple parametrization for the optimum filter passband shifts depending on the atmospheric temperature range of interest and the background. The approximation errors of this parametrization are smaller than 2% for temperatures between 200 and 300 K and smaller than 4% between 180 and 200 K.