The HITRAN 2004 molecular spectroscopic database

Rothman, Laurence S.; Jacquemart, D.; Barbé, A.; Benner, D. Chris; Birk, Manfred; Brown, Linda R.; Carleer, Michel; Chackerian, C.; Chance, K.; Coudert, L. H.; Dana, V.; Devi, V. Malathy; Flaud, J.-M.; Gamache, Robert R.; Goldman, A.; Hartmann, Jean‐Michel; Jucks, K. W.; Maki, Arthur G.; Mandin, J.-Y.; Massie, Steven T.; Orphal, J.; Perrin, A.; Rinsland, C. P.; Smith, Mary Ann H.; Tennyson, Jonathan; Tolchenov, R.N.; Toth, R. A.; Auwera, J. Vander; Varanasi, P.; Wagner, Georg

doi:10.1016/j.jqsrt.2004.10.008

Cited by 2,765 publications

(2,211 citation statements)

References 318 publications

(189 reference statements)

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“…Line strengths S ml and positions ω 0ml are based on the HITRAN [60] list (see [68,69] for reviews) and other sources as described earlier [46]. The results of Section IV include summation over the oscillator strengths of the air components N 2 , O 2 , Ar, Ne, CO 2 , H 2 O, O 3 , CH 4 and CO. Fig.…”

Section: A Methodologymentioning

confidence: 99%

“…1 is an estimate of the combined contribution of tracer gases that are missing in this mix of moleculesand effectively replaced by the average refractivity of the major components-sorted with respect to abundance under rather clean environmental conditions. Their electromagnetic line lists are taken from [41,75] for He, [11] for Kr, [45] for H 2 , [45,60] for N 2 O, [60] for SO 2 , and [45,60] The remaining subsections describe some refinements of the computer program relative to its status three years ago [46].…”

Section: A Methodologymentioning

confidence: 99%

“…The approach is in continuation of earlier work [46] based on a more recent HITRAN database [60] plus more precise accounting of various electromagnetic effects for the dielectric response of dilute gases, as described below.…”

Section: Scopementioning

confidence: 97%

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Refractive index of humid air in the infrared: model fits

Mathar¹

2007

J. Opt. A: Pure Appl. Opt.

103

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The theory of summation of electromagnetic line transitions is used to tabulate the Taylor expansion of the refractive index of humid air over the basic independent parameters (temperature, pressure, humidity, wavelength) in five separate infrared regions from the H to the Q band at a fixed percentage of Carbon Dioxide. These are least-squares fits to raw, highly resolved spectra for a set of temperatures from 10 to 25 • C, a set of pressures from 500 to 1023 hPa, and a set of relative humidities from 5 to 60%. These choices reflect the prospective application to characterize ambient air at mountain altitudes of astronomical telescopes. The paper provides easy access to predictions of the refractive index of humid air at conditions that are typical in atmospheric physics, in support of ray tracing [5] and astronomical applications [4,16,47,50] until experimental coverage of the infrared wavelengths might render these obsolete. The approach is in continuation of earlier work [46] based on a more recent HITRAN database [60] plus more precise accounting of various electromagnetic effects for the dielectric response of dilute gases, as described below.The literature of optical, chemical and atmospheric physics on the subject of the refractive index of moist air falls into several categories, sorted with respect to decreasing relevance (if relevance is measured by the closeness to experimental data and the degree of independence to the formalism employed here):1. experiments on moist air in the visible [3,9,18,53 [42,61,79] and eventually in the static limit [24], the refractive index plotted as a function of wavelength is more and more structured by individual lines. Since we will not present these functions at high resolution but smooth fits within several bands in the infrared, their spiky appearance sets a natural limit to the far-IR wavelength regions that our approach may cover. II. DIELECTRIC MODEL A. MethodologyThe complex valued dielectric function n(ω) of air n = 1 +χ (1) is constructed from molecular dynamical polarizabilitiesN m are molecular number densities, S ml are the line intensities for the transitions enumerated by l. ω 0ml are the transition angular frequencies, Γ ml the full linewidths at half maximum. c is the velocity of light in vacuum, and i the imaginary unit. The line shape (2) adheres to the complex-conjugate symmetry χ m (ω) = χ * m (−ω), as required for functions which are real-valued in the time domain. The sign convention of Γ ml merely reflects a sign choice in the Fourier Transforms and carries no real significance; a sign in the Kramers-Kronig formulas is bound to it. The integrated imaginary part is [28] whereν = k/(2π) = ω/(2πc) = 1/λ is the wavenumber.

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Section: A Methodologymentioning

confidence: 99%

Section: A Methodologymentioning

confidence: 99%

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Refractive index of humid air in the infrared: model fits

Mathar¹

2007

J. Opt. A: Pure Appl. Opt.

103

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“…The simulation generates a synthetic spectrum for reflected light containing spectral features from the HITRAN [16] database. It should be noted that the HITRAN database is intended for evaluating absorption in the Earth's atmosphere and consequently, some bands found in the Martian atmosphere have been neglected or are incomplete in this database.…”

Section: Simulationsmentioning

confidence: 99%

A hollow-waveguide gas correlation radiometer for ultra-precise column measurements of formaldehyde on Mars

Wilson

Neveu

Riris

et al. 2011

Meas. Sci. Technol.

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Abstract. We present preliminary results in the development of a miniaturized gas correlation radiometer that implements a hollow-core optical fiber (hollow waveguide) gas correlation cell. The substantial reduction in mass and volume of the gas correlation cell makes this technology appropriate for an orbital mission Ð capable of pinpointing sources of trace gases in the Martian atmosphere. Here we demonstrate a formaldehyde (H2CO) sensor and report a detection limit equivalent to ~30 ppb in the Martian atmosphere. The relative simplicity of the technique allows it to be expanded to measure a range of atmospheric trace gases of interest on Mars such as methane (CH 4), water vapour (H2O), deuterated water vapour (HDO), and methanol (CH3OH). Performance of a formaldehyde instrument in a Mars orbit has been simulated assuming a 3 meter long, 1000 micron inner diameter hollow-core fiber gas correlation cell, a 92.8 degree sunsynchronous orbit from 400 km with a horizontal sampling scale of 10 km x 10 km. Initial results indicate that for one second of averaging, a detection limit of 1 ppb is possible.

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“…10. The PA spectrum of ammonia has been measured in this case using laser IM and 1f detection, in order to enable easy comparison with the spectrum calculated from Hitran database [10]. The large offset observed in the experimental spectrum is induced by wall noise as discussed in Section 3.2.…”

Section: Ammonia Sensingmentioning

confidence: 99%

Novel Helmholtz-based photoacoustic sensor for trace gas detection at ppm level using GaInAsSb/GaAlAsSb DFB lasers

Mattiello¹,

Niklès²,

Schilt

et al. 2006

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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A new and compact photoacoustic sensor for trace gas detection in the 2-2.5 m atmospheric window is reported. Both the development of antimonide-based DFB lasers with singlemode emission in this spectral range and a novel design of photoacoustic cell adapted to the characteristics of these lasers are discussed. The laser fabrication was made in two steps. The structure was firstly grown by molecular beam epitaxy then a metallic DFB grating was processed. The photoacoustic cell is based on a Helmholtz resonator that was designed in order to fully benefit from the highly divergent emission of the antimonide laser. An optimized modulation scheme based on wavelength modulation of the laser source combined with second harmonic detection has been implemented for efficient suppression of wall noise. Using a 2211 nm laser, sub-ppm detection limit has been demonstrated for ammonia.

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The HITRAN 2004 molecular spectroscopic database

Cited by 2,765 publications

References 318 publications

Refractive index of humid air in the infrared: model fits

Refractive index of humid air in the infrared: model fits

A hollow-waveguide gas correlation radiometer for ultra-precise column measurements of formaldehyde on Mars

Novel Helmholtz-based photoacoustic sensor for trace gas detection at ppm level using GaInAsSb/GaAlAsSb DFB lasers

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