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Title: Imaging observations of upper mesospheric nightglow emissions from Tirunelveli (8.7oN)
Authors: Narayanan, V Lakshmi
Gurubaran, S
Emperumal, K
Keywords: Airglow imagers;Mesosphere-lower thermosphere region;Gravity waves;Nightglow emissions
Issue Date: Jun-2009
Publisher: CSIR
PACS No.: 92.60.hw; 92.60.hh; 92.60.hc
Abstract: An all-sky airglow imager was installed at the equatorial site Tirunelveli (8.7oN, 77.8oE geographic; 1.34oN magnetic dip) during January 2007 to study the small-scale dynamics occurring in the mesosphere-lower thermosphere (MLT) region. The instrument details are presented in the paper along with methods of information retrieval from the recorded data. The presence of a variety of small-scale mesospheric dynamical events, observed with the instrument, is demonstrated. Preliminary results on the observed features, viz. the quasi-monochromatic gravity waves and instability features, such as ripples and mesospheric bores, are presented in the paper.
Page(s): 150-158
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.38(3) [June 2009]

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