Reinvestigation of pressure broadening parameters at 60-GHz band and single 118.75GHz oxygen lines at room temperature

Golubiatnikov, G. Yu.; Koshelev, М.А.; Krupnov, A. F.

doi:10.1016/j.jms.2003.08.002

Cited by 22 publications

(5 citation statements)

References 31 publications

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“…Focused efforts to improve the oxygen A-band database using Fourier Transform [12, 13] and Cavity Ring Down Spectroscopy (CRDS) were published in the years leading up to launch including (1) precise and accurate position measurements for multiple isotopologues [12, 14, 15] (2) precise and accurate intensity measurements [12, 14, 16, 17, 18, 19, 20] (3) lineshape narrowing determinations for air and self collisional interactions [12, 13, 14, 17] (4) estimates for the temperature dependence of the broadening parameters [21] (5) determinations of line-mixing (LM) and collision-induced absorption (CIA) for high pressures [22], as well as atmospheric pressures in the P-branch [23] and (6) estimates of the extent of water broadening [24, 25, 26, 27]. Much of this information was absorbed into the most recent update of HITRAN [28], with the exceptions for the self-shift coefficient [14] and partial LM/CIA information [23].…”

Section: Introductionmentioning

confidence: 99%

Multispectrum analysis of the oxygen A-band

Drouin¹,

Benner²,

Brown³

et al. 2017

Journal of Quantitative Spectroscopy and Radiative Transfer

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Retrievals of atmospheric composition from near-infrared measurements require measurements of airmass to better than the desired precision of the composition. The oxygen bands are obvious choices to quantify airmass since the mixing ratio of oxygen is fixed over the full range of atmospheric conditions. The OCO-2 mission is currently retrieving carbon dioxide concentration using the oxygen A-band for airmass normalization. The 0.25% accuracy desired for the carbon dioxide concentration has pushed the required state-of-the-art for oxygen spectroscopy. To measure O2 A-band cross-sections with such accuracy through the full range of atmospheric pressure requires a sophisticated line-shape model (Rautian or Speed-Dependent Voigt) with line mixing (LM) and collision induced absorption (CIA). Models of each of these phenomena exist, however, this work presents an integrated self-consistent model developed to ensure the best accuracy. It is also important to consider multiple sources of spectroscopic data for such a study in order to improve the dynamic range of the model and to minimize effects of instrumentation and associated systematic errors. The techniques of Fourier Transform Spectroscopy (FTS) and Cavity Ring-Down Spectroscopy (CRDS) allow complimentary information for such an analysis. We utilize multispectrum fitting software to generate a comprehensive new database with improved accuracy based on these datasets. The extensive information will be made available as a multi-dimensional cross-section (ABSCO) table and the parameterization will be offered for inclusion in the HITRANonline database.

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Section: Introductionmentioning

confidence: 99%

Multispectrum analysis of the oxygen A-band

Drouin¹,

Benner²,

Brown³

et al. 2017

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…Our line data are from a recently compiled planetary toolbox, which gives line pressure broadening as a function of atmospheric composition for mixtures of common planetary species 1 by Mendrok and Eriksson (2014), who assume that the molecular oxygen pressure broadening by carbon dioxide is ∼ 20 kHz Pa −1 at 296 K for our absorption line. This is directly taken from the 118 GHz line value presented by Golubiatnikov et al (2003). This spectroscopic toolbox allows for direct calculations in Mars' carbon-dioxide-rich atmosphere.…”

Section: Orbit and Sensor Considerationsmentioning

confidence: 99%

Martian magnetism with orbiting sub-millimeter sensor: simulated retrieval system

Larsson

Milz

Eriksson

et al. 2017

Geosci. Instrum. Method. Data Syst.

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Abstract. A Mars-orbiting sub-millimeter sensor can be used to retrieve the magnetic field at low altitudes over large areas of significant planetary crustal magnetism of the surface of Mars from measurements of circularly polarized radiation emitted by the 368 GHz ground-state molecular oxygen absorption line. We design a full retrieval system for one example orbit to show the expected accuracies on the magnetic field components that one realization of such a Mars satellite mission could achieve. For one set of measurements around a tangent profile, we find that the two horizontal components of the magnetic field can be measured at about 200 nT error with a vertical resolution of around 4 km from 6 up to 70 km in tangent altitude. The error is similar regardless of the true strength of the magnetic field, and it can be reduced by repeated measurements over the same area. The method and some of its potential pitfalls are described and discussed.

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“…The 60 GHz oxygen band and 118 GHz line perturbed by N 2 have been studied extensively due to their applications in remote sensing observations and temperature profiling. [15][16][17][18][19][20][21][22] In this paper, we report a new ab initio potential energy surface (PES) for the O 2 (X 3 Σ − g )-N 2 (X 1 Σ + g ) system, and we use it in quantum scattering calculations of the shape of the N 2 -perturbed 118 GHz fine structure 1− line in O 2 . Since the O 2 -N 2 interaction is of electrostatic origin and depends very weakly on electron spin, we make use of the powerful recoupling techniques of Corey and McCourt, 23 and Alison Offer et al 24 to reduce the problem of 3 Σ diatom-1 Σ diatom scattering to collisions involving two 1 Σ rigid rotors.…”

Section: Introductionmentioning

confidence: 99%

“…Our ab initio results agree with the available experimental data. 15,16,20,21,28 The O 2 -N 2 collisional system plays a benchmark role for studying the transitions occurring within single rotational levels of atmospheric molecules, the results of such studies being important for accurate modelling and calculations of ab initio line parameters for systems of atmospheric interest in Earth as well as exoplanetary studies, and populating the spectroscopic databases with high-accuracy theoretical results. So far, in this context, extensive ab initio quantum-scattering calculations of the line-shape parameters were performed for the simple systems of He-perturbed H 2 [29][30][31][32][33] and HD 34,35 , which are relevant for the atmospheres of Solar System gas giants and some types of exoplanets.…”

Section: Introductionmentioning

confidence: 99%

Fully quantum calculations of O2–N2 scattering using a new potential energy surface: Collisional perturbations of the oxygen 118 GHz fine structure line

Gancewski

Jóźwiak

Quintas‐Sánchez

et al. 2021

The Journal of Chemical Physics

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A proper description of the collisional perturbation of the shapes of molecular resonances is important for remote spectroscopic studies of the terrestrial atmosphere. Of particular relevance are the collisions between the O 2 and N 2 molecules -the two most abundant atmospheric species. In this work, we report a new highly accurate O 2 (X 3 Σ − g )-N 2 (X 1 Σ + g ) potential energy surface and use it for performing the first quantumscattering calculations addressing line shapes for this system. We use it to model the shape of the 118 GHz fine structure line in O 2 perturbed by collisions with N 2 molecules, a benchmark system for testing our methodology in the case of an active molecule in a spin triplet state. The calculated collisional broadening of the line agrees well with the available experimental data over a wide temperature range relevant for the terrestrial atmosphere. This work constitutes a step towards populating the spectroscopic databases with ab initio line-shape parameters for atmospherically relevant systems.

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Reinvestigation of pressure broadening parameters at 60-GHz band and single 118.75GHz oxygen lines at room temperature

Cited by 22 publications

References 31 publications

Multispectrum analysis of the oxygen A-band

Multispectrum analysis of the oxygen A-band

Martian magnetism with orbiting sub-millimeter sensor: simulated retrieval system

Fully quantum calculations of O2–N2 scattering using a new potential energy surface: Collisional perturbations of the oxygen 118 GHz fine structure line

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