Articles | Volume 33, issue 5
Regular paper
18 May 2015
Regular paper |  | 18 May 2015

An investigation of long-distance propagation of gravity waves under CAWSES India Phase II Programme

N. Parihar and A. Taori

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An investigation of the ionospheric F region near the EIA crest in India using OI 777.4 and 630.0 nm nightglow observations
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Simultaneous measurement of OI 557.7 nm, O2 (0, 1) Atmospheric Band and OH (6, 2) Meinel Band nightglow at Kolhapur (17° N), India
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This study investigates the long-distance propagation (~ 1200–2000km) of gravity waves in the Indian subcontinent using coordinated nightglow measurements at Allahabad and Gadanki (separated by ~ 12º latitude). On few occasions, an identical wave (period in range ~ 2.2–4.5h) was seen at both sites that shared a common source. Waves had large horizontal wavelength (~ 1194–2746km) and phase speed (77–331m/s). The m2 profile analysis suggests the ducted propagation of the common waves.