Comparison of three high resolution real-time spectrometers for microwave ozone profiling instruments

Sauvageat, Eric; Kotiranta, Mikko; Hocke, Klemens; Gomez, R. Michael; Nedoluha, Gerald; Murk, Axel (2020). Comparison of three high resolution real-time spectrometers for microwave ozone profiling instruments. In: 2020 16th Specialist Meeting on Microwave Radiometry and Remote Sensing for the Environment (MicroRad) (pp. 1-4). IEEE 10.1109/MicroRad49612.2020.9342608

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We present a comparison of digital real-time spectrometers used in ground-based radiometry for the profiling of trace gases in the middle-atmosphere. From January to June 2019, we performed parallel observations of the atmospheric ozone transition line at 110.836 GHz with three different spectrometers connected to the same front-end. It allows to compare and characterize the ozone spectra over an extended period of time and covering a wide range of meteorological conditions. We show that the spectra derived from the Acqiris AC240 is systematically biased compared to other state-of-the-art spectrometers. It has a different spectral slope and a negative bias at the line center on the order of 8 percent. The bias evolves with the atmospheric opacity and originates from various sources. Using some simple corrections, we show that the bias from the AC240 can be corrected during data processing which is of high interest for the numerous time series derived from this back-end.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Microwaves

UniBE Contributor:

Sauvageat, Eric; Kotiranta, Mikko Matias; Hocke, Klemens and Murk, Axel

Subjects:

600 Technology > 620 Engineering
500 Science
500 Science > 530 Physics

ISBN:

978-1-7281-7093-0

Publisher:

IEEE

Language:

English

Submitter:

Simone Corry

Date Deposited:

25 Mar 2021 16:21

Last Modified:

25 Mar 2021 16:21

Publisher DOI:

10.1109/MicroRad49612.2020.9342608

BORIS DOI:

10.48350/153021

URI:

https://boris.unibe.ch/id/eprint/153021

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