Nonlinear least squares analysis of atmospheric absorption spectra
- 15 October 1980
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 19 (20), 3481-3490
- https://doi.org/10.1364/ao.19.003481
Abstract
The essential elements of practical nonlinear least squares analysis of atmospheric absorption spectra are discussed. These include speed of analysis, flexibility of spectrum type, and stability in the presence of noise. A computer program which embodies these elements is described, and two types of results are presented. The first is a series of least squares analyses of synthetic spectra, both noise free and noisy. The second is a summary of results from analyses of high resolution solar spectra. Among the parameters which have been fit are trace gas mixing ratios, temperatures, spectral background, instrument resolution, phase error and channel spectrum parameters, line shifts, intensities, and broadening coefficients.This publication has 15 references indexed in Scilit:
- Fourier transform method for calculating the transmittance of inhomogeneous atmospheresApplied Optics, 1979
- Λ-Doubling in the v = 2 ← 0 overtone band in the infrared spectrum of NOJournal of Molecular Spectroscopy, 1979
- Determination of abundances of gases from solar spectraJournal of Quantitative Spectroscopy and Radiative Transfer, 1978
- AFGL trace gas compilationApplied Optics, 1978
- Simultaneous determination of the ground level abundances of N2O, CO2, CO and H2OJournal of Quantitative Spectroscopy and Radiative Transfer, 1977
- Intensities and widths of H2O lines between 1800 and 2100 cm-1Journal of Quantitative Spectroscopy and Radiative Transfer, 1977
- A Nonlinear Least Squares Method of Determining Line Intensities and Half-WidthsApplied Spectroscopy, 1977
- Determination of rotational temperatures of diatomic molecules from absorption spectra measured at moderate resolutionJournal of Quantitative Spectroscopy and Radiative Transfer, 1977
- Détermination des demi-largeur et intensité d'une raie spectrale par une méthode de régression non linéaireInfrared Physics, 1973
- Determination of Parameters in Absorption Spectra by Numerical Minimization TechniquesJournal of the Optical Society of America, 1966