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Mesospheric Observations with the Eiscat Uhf Radar During Polar Cap Absorption Events: 3. Comparison with Simultaneous Eiscat Vhf Measurements : Volume 16, Issue 10 (30/11/-0001)

By Collis, P. N.

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Book Id: WPLBN0003973958
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Mesospheric Observations with the Eiscat Uhf Radar During Polar Cap Absorption Events: 3. Comparison with Simultaneous Eiscat Vhf Measurements : Volume 16, Issue 10 (30/11/-0001)  
Author: Collis, P. N.
Volume: Vol. 16, Issue 10
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Collis, P. N., & Rietveld, M. T. (-0001). Mesospheric Observations with the Eiscat Uhf Radar During Polar Cap Absorption Events: 3. Comparison with Simultaneous Eiscat Vhf Measurements : Volume 16, Issue 10 (30/11/-0001). Retrieved from http://members.worldlibrary.net/


Description
Description: EISCAT Scientific Association, Box 812, S-981 28 Kiruna, Sweden. Mesospheric observations were obtained by the EISCAT UHF and VHF radars during the solar proton event of March 1990. We present the first comparison of incoherent-scatter spectral measurements from the middle mesosphere using simultaneous, co-located observations by the two radars. VHF spectra observed with a vertical antenna were found to be significantly narrower than model predictions, in agreement with earlier UHF results. For antenna pointing directions that were significantly away from the vertical, the wider VHF radar beam gave rise to broadening of the observed spectra due to vertical shears in the horizontal wind. In this configuration, UHF spectral measurements were found to be more suitable for aeronomical applications. Both radar systems provide consistent and reliable estimates of the neutral wind. Spectral results using both the multipulse and pulse-to-pulse schemes were intercompared and their suitability for application to combined mesosphere – lower thermosphere studies investigated.

Key words. Mesophere · Lower thermosphere · EISCAT UHF radar · EISCAT VHF radar


Summary
Mesospheric observations with the EISCAT UHF radar during polar cap absorption events:
3. Comparison with simultaneous EISCAT VHF measurements



 

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