Atmospheric Band Fitting Coefficients Derived from Self-Consistent Rocket-Borne Experiment

Abstract

<p><strong>Abstract.</strong> Based on self-consistent rocket-borne measurements of temperature, densities of atomic oxygen and neutral air, and volume emission of the Atmospheric Band (762 nm) we examined the one-step and two-step excitation mechanism of <i>O</i><sub>2</sub>(<i>b</i><sup>1</sup>Σ<sub><i>g</i></sub><sup>+</sup>) for night-time conditions. Following McDade et al. (1986), we derived the empirical fitting coefficients, which parameterize the Atmospheric Band emission <i>O</i><sub>2</sub>(<i>b</i><sup>1</sup>Σ<sub><i>g</i></sub><sup>+</sup> − <i>X</i><sup>3</sup>Σ<sub><i>g</i></sub><sup>−</sup>)(0,0) in terms of the atomic oxygen concentrations. This allows to derive atomic oxygen concentration from night-time observations of Atmospheric Band emission <i>O</i><sub>2</sub>(<i>b</i><sup>1</sup>Σ<sub><i>g</i></sub><sup>+</sup> − <i>X</i><sup>3</sup>Σ<sub><i>g</i></sub><sup>−</sup>)(0,0). The derived empirical parameters can also be utilised for Atmospheric Band modelling. Additionally, we derived fit function and corresponding coefficients for combined (one- and two-step) mechanism. Simultaneous and true common volume measurements of all the parameters used in this derivation, i.e. temperature and density of the background air, atomic oxygen density, and volume emission rate, is the novelty and the advantage of this work.</p>

Photochemical modeling of molecular and atomic oxygen based on multiple nightglow emissions measured in situ during the Energy Transfer in the Oxygen Nightglow rocket campaign

“…In fact, the well-known quadratic equation resulting from the model with the O 2 (b) precursor and the well-known cubic equation resulting from the model with the O( 1 S) precursor were concluded by McDade et al (1986) to be favorable compared to models based on the onestep (Chapman) excitation scheme. It is worth mentioning that Grygalashvyly et al (2019) proposed a model combining the Chapman and Barth excitation schemes, which were implemented in both O 2 (b) models of McDade et al (1986) separately. Applying self-consistent data sets (see Sect.…”

Atomic oxygen number densities in the MLT region measured by solid electrolyte sensors on WADIS-2

“…with the interpretation of the results in the atmospheric-physical context: A paper by Strelnikov et al analyses waves and turbulence in the rocket data of neutrals, ions, electrons and atomic oxygen (Strelnikov et al, 2018), and a paper by Grygalashvyly et al examines the excitation mechanism of O 2 based on the simultaneous measurement of atomic oxygen by both FIPEX and photometers (Grygalashvyly et al, 2018).…”

“…However, the amplitude of the signals is damped and the absolute value of the density is not resolved correctly. The analysis of the frequency content of the signals nevertheless allows valuable conclusions on the interaction of atmospheric turbulence and atomic oxygen, which is detailed in a companion paper (Strelnikov et al, 2018).…”

Photochemical modeling of molecular and atomic oxygen based on multiple <i>in-situ</i> emissions measured during the Energy Transfer in the Oxygen Nightglow rocket campaign

“…mentioning that Grygalashvyly et al (2018) proposed a model combining the Chapman and Barth excitation schemes, which were implemented in both O 2 (b)-models of McDade et al (1986) separately. Applying self-consistent data sets (see Section 2) and fitting retrieved data sets, Grygalashvyly et al (2018) applied methods of McDade et al (1986) to derive new values of empirical coefficients, which were initially derived by McDade et al (1986) for the well-known quadratic equation. The newly derived coefficients were preferred by Grygalashvyly et al (2018) to be applied in their model.…”

“…Applying self-consistent data sets (see Section 2) and fitting retrieved data sets, Grygalashvyly et al (2018) applied methods of McDade et al (1986) to derive new values of empirical coefficients, which were initially derived by McDade et al (1986) for the well-known quadratic equation. The newly derived coefficients were preferred by Grygalashvyly et al (2018) to be applied in their model. The well-known cubic equation of McDade et al (1986) provided here in the full form and in the short form was used here to retrieve [O( 3 P )] on the basis of VER of the green line emission (VER 558 also referred to as VER{O( 1 S − 1 D)}).…”