Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

Eberhart, Martin; Löhle, Stefan; Steinbeck, Andreas; Binder, Tilman; Fasoulas, Stefanos

doi:10.5194/amt-8-3701-2015

Cited by 32 publications

(25 citation statements)

References 38 publications

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“…The FIPEX instruments were developed by IRS and were for the first time ever flown on a sounding rocket during the WADIS-1 campaign, yielding profiles of atomic oxygen densities with high altitude resolution (see Eberhart et al, 2015).…”

Section: Wadis Payloadmentioning

confidence: 99%

Spatial and temporal variability in MLT turbulence inferred from in situ and ground-based observations during the WADIS-1 sounding rocket campaign

et al. 2017

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Abstract. In summer 2013 the WADIS-1 sounding rocket campaign was conducted at the Andøya Space Center (ACS) in northern Norway (69 • N, 16 • E). Among other things, it addressed the question of the variability in mesosphere/lower thermosphere (MLT) turbulence, both in time and space. A unique feature of the WADIS project was multi-point turbulence sounding applying different measurement techniques including rocket-borne ionization gauges, VHF MAARSY radar, and VHF EISCAT radar near Tromsø. This allowed for horizontal variability to be observed in the turbulence field in the MLT at scales from a few to 100 km. We found that the turbulence dissipation rate, ε varied in space in a wavelike manner both horizontally and in the vertical direction. This wavelike modulation reveals the same vertical wavelengths as those seen in gravity waves. We also found that the vertical mean value of radar observations of ε agrees reasonably with rocket-borne measurements. In this way defined ε radar value reveals clear tidal modulation and results in variation by up to 2 orders of magnitude with periods of 24 h. The ε radar value also shows 12 h and shorter (1 to a few hours) modulations resulting in one decade of variation in ε radar magnitude. The 24 h modulation appeared to be in phase with tidal change of horizontal wind observed by SAURA-MF radar. Such wavelike and, in particular, tidal modulation of the turbulence dissipation field in the MLT region inferred from our analysis is a new finding of this work.

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Section: Wadis Payloadmentioning

confidence: 99%

Spatial and temporal variability in MLT turbulence inferred from in situ and ground-based observations during the WADIS-1 sounding rocket campaign

et al. 2017

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“…Sampling is realised with a frequency of 100 Hz and enables a spatial resolution of ~10 m. Laboratory calibrations were done for molecular and atomic oxygen. For a detailed description of the FIPEX instruments and their calibration techniques see Eberhart et al (2015Eberhart et al ( , 2018.…”

Section: Cone (Combined Measurement Of Neutrals and Electrons) Operamentioning

confidence: 99%

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

Grygalashvyly¹,

Eberhart²,

Hedin³

et al. 2018

Preprint

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Abstract. Based on self-consistent rocket-borne measurements of temperature, densities of atomic oxygen and neutral air, and volume emission of the Atmospheric Band (762&#8201;nm) we examined the one-step and two-step excitation mechanism of O2(b1&#931;g+) for night-time conditions. Following McDade et al. (1986), we derived the empirical fitting coefficients, which parameterize the Atmospheric Band emission O2(b1&#931;g+&#8201;&#8722;&#8201;X3&#931;g&#8722;)(0,0) in terms of the atomic oxygen concentrations. This allows to derive atomic oxygen concentration from night-time observations of Atmospheric Band emission O2(b1&#931;g+&#8201;&#8722;&#8201;X3&#931;g&#8722;)(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.

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“…[10][11][12][13][14] These measurements are supported by rare occasions to measure the parameters in actual flight scenarios. [15][16][17] One important research area is the improvement of heat flux measurements.…”

Section: Introductionmentioning

confidence: 99%

Review of Heat Flux Measurements for High Enthalpy Flows

Löhle

2016

32nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference

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This article reviews heat flux measurement devices for high enthalpy flows as used in plasma wind tunnel facilities. Only heat flux gages measuring heat flux on cold copper surfaces are considered. The steady state water-cooled calorimeter, the Gardon gage sensor, slug calorimetry and swept nullpoint calorimetry are described. Based on published data and sensor heritage the various designs in Europe and the US are reviewed and analyzed. The paper ends with some remarks on comparability testing in different facilities.

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Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

Cited by 32 publications

References 38 publications

Spatial and temporal variability in MLT turbulence inferred from in situ and ground-based observations during the WADIS-1 sounding rocket campaign

Spatial and temporal variability in MLT turbulence inferred from in situ and ground-based observations during the WADIS-1 sounding rocket campaign

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

Review of Heat Flux Measurements for High Enthalpy Flows

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