NDLI: Monitoring the stratospheric ozone profile with ground-based microwave radiometer

Content Provider	IEEE Xplore Digital Library
Author	Heilimo, J. Talvela, J. Hallikainen, M.
Copyright Year	1994
Description	Author affiliation: Lab. of Space Technol., Helsinki Univ. of Technol., Espoo, Finland (Heilimo, J.; Talvela, J.; Hallikainen, M.)
Abstract	The destructive effects of stratospheric pollution (e.g. CFC-compounds) to the atmospheric ozone have been known for several years. Continuous monitoring of ozone in the stratosphere helps us to learn more about the chemistry of ozone in the atmosphere. A low noise superheterodyne receiver has been designed and constructed for ground-based monitoring of stratospheric ozone at Helsinki University of Technology. Ozone profiles are measured at a 110.836 GHz centre frequency with a 1200 MHz bandwidth. With the radiometer the authors are able to determine the ozone profile from 15 km to 70 km with a vertical resolution of 5 km. Continuous monitoring of ozone spectral lines has been carried out since August 1993. The first results are compared to balloon sounding measurements from a nearby sounding location. Various inversion methods for retrieving the ozone profile from measurements are presented including the Backus-Gilbert method. Some recent results are presented and short-time variations of atmospheric ozone are discussed (e.g. day-time vs. night-time variations).
Starting Page	1696
Ending Page	1699
File Size	319168
Page Count	4
File Format	PDF
ISBN	0780314972
DOI	10.1109/IGARSS.1994.399541
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-08-08
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Monitoring Atmospheric measurements Pollution measurement Terrestrial atmosphere Chemistry Acoustic noise Chemical technology Frequency measurement Bandwidth Radiometry
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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