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Upgrading a groundbased 142 GHz microwave radiometer to higher sensitivity
LuleƄ University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The accuracy of ozone measurements in the middle atmosphere is of great importance when determining its diurnal variation. A high time resolution of the measured data is desirable and depends on the sensitivity of the receiver used to detect the ozone. This thesis aims to improve the sensitivity of a groundbased 142 GHz microwave radiometer used for measuring atmospheric ozone data. This is done by replacing the previous receiver components with a series of new components and arranging them in different setups for comparison purposes. Mechanics and wiring were changed in order to install the setups along with changes in the optics. Each test setup could be implemented as a first step towards improving the sensitivity of the radiometer. The result show that the optics contribute with an unexpected addition of noise to the measurements and hence the overall performance and improvement of the radiometer could not be determined. Suggestions are made for further work which include improving the optics and performing cryo-measurements.

Place, publisher, year, edition, pages
2016. , 33 p.
Keyword [en]
Atmospheric ozone, Radiometer, 142 GHz ozone line, Sensitivity
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-59970OAI: oai:DiVA.org:ltu-59970DiVA: diva2:1040133
Subject / course
Student thesis, at least 30 credits
Educational program
Space Engineering, master's level
Examiners
Available from: 2016-10-28 Created: 2016-10-26 Last updated: 2016-10-28Bibliographically approved

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