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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 10 Dec 2018

Research article | 10 Dec 2018

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Atmospheric Measurement Techniques (AMT).

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

Martin Eberhart1, Stefan Löhle1, Boris Strelnikov2, Jonas Hedin4, Mikhail Khaplanov4,†, Stefanos Fasoulas1, Jörg Gumbel4, Franz-Josef Lübken2, and Markus Rapp3 Martin Eberhart et al.
  • 1Institute of Space Systems, University of Stuttgart, Germany
  • 2Leibniz-Institute of Atmospheric Physics, University of Rostock, Kühlungsborn, Germany
  • 3Institute of Atmospheric Physics, German Aerospace Center, Oberpfaffenhofen, Germany
  • 4Department of Meteorology (MISU), Stockholm University, Stockholm, Sweden
  • Deceased

Abstract. Absolute profiles of atomic oxygen number densities with high vertical resolution have been determined in the MLT region from in-situ measurements by several rocket-borne solid electrolyte sensors. The amperometric sensors were operated in both controlled and uncontrolled modes and with various orientations on the fore and aft deck of the payload. Calibration was based on mass spectrometry in a molecular beam containing atomic oxygen produced in a microwave discharge. The sensor signal is proportional to the number flux onto the electrodes and the mass flow rate in the molecular beam was measured additionally to derive this quantity from the spectrometer reading. Numerical simulations provided aerodynamic correction factors to derive the atmospheric number density of atomic oxygen from the sensor data. The flight results indicate a preferable orientation of the electrode surface perpendicular to the rocket axis. While unstable during the upleg, the density profiles measured by these sensors show an excellent agreement with the atmospheric models and photometer results during the downleg of the trajectory. The high spatial resolution of the measurements allows the identification of small-scaled variations in the atomic oxygen concentration.

Martin Eberhart et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Martin Eberhart et al.
Martin Eberhart et al.
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Short summary
This paper describes the measurement of atomic oxygen in the upper atmosphere onboard sounding rockets using solid electrolyte sensors. Calibration of the sensors in the laboratory is explained in detail. Results from the WADIS-2 rocket campaign show profiles of atomic oxygen density with a high spatial resolution.
This paper describes the measurement of atomic oxygen in the upper atmosphere onboard sounding...