作者: V.L. Narayanan , S. Gurubaran , M.B. Berlin Shiny , K. Emperumal , P.T. Patil
DOI: 10.1016/J.JASTP.2017.03.006
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摘要: Abstract All-sky imaging observations of OI 630.0 nm airglow were carried out in campaign mode from Panhala (16.8°N, 74.1°E geographic; 11.1°N dip latitude), India, during January to March 2008. On 14 37 nights, equatorial plasma bubbles observed. The drift speeds observed decrease with time concurrence the previous results. tilts mostly westward while on rare occasions tilted eastwards. drifts found be relatively lesser disturbed nights appear marginally larger. interdepletion distances (or bubble spacings) also showed a decreasing trend till midnight indicating that approach each other passage time. Such behavior is not reported earlier and it seems have important implications for understanding evolution bubbles. occasions, occurred groups. An ionosonde operating over Indian site Tirunelveli (1.1°N latitude) was used study variations base height ionosphere observations. measurements indicate lack significant pre-reversal enhancement (PRE) geomagnetic quiet days which