On deriving gravity wave characteristics in the daytime upper atmosphere using radio technique

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dc.contributor.author Mandal, Subir
dc.contributor.author Pallamraju, Duggirala
dc.contributor.author Karan, Deepak K.
dc.contributor.author Phadke, Kedar A.
dc.contributor.author Singh, Ravindra P.
dc.contributor.author Suryawanshi, Pradip
dc.date.accessioned 2019-07-16T09:58:27Z
dc.date.available 2019-07-16T09:58:27Z
dc.date.issued 2019-07
dc.identifier.citation Mandal, Subir; Pallamraju, Duggirala; Karan, Deepak K.; Phadke, Kedar A.; Singh, Ravindra P. and Suryawanshi, Pradip, �On deriving gravity wave characteristics in the daytime upper atmosphere using radio technique�, Journal of Geophysical Research: Space Physics, DOI: 10.1029/2019JA026723, Jul. 2019. en_US
dc.identifier.issn 2169-9380
dc.identifier.uri https://doi.org/10.1029/2019JA026723
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/4608
dc.description.abstract The importance of neutral wave dynamics in the understanding of the upper atmospheric processes is well?known. Conventionally, optical methods are used to derive information on the neutral wave dynamics by obtaining gravity wave (GW) characteristics. Optical measurement techniques use airglow emissions as tracers to obtain such information that correspond to altitudes from where the emissions emanate. However, in this paper, we describe a method using radio wave measurement technique (digisonde) to obtain information on the neutral GW behaviour. It involves monitoring of variations in the heights of isoelectron densities as a function of time, and their phase shifts, if any, to derive vertical propagation speeds and scale sizes of GWs. The daytime values of GW time periods, vertical phase speeds, and vertical scale sizes obtained for the duration of 16?21 May 2015 are in the range of 1.47 � 0.05 to 2.64 � 0.07 h, 30.06 � 4.35 to 45.69 � 11.84 ms?1, and 183.21 � 39.23 to 393.07 � 66.38 km, respectively. Further, we have used the GW dispersion relation to make a first order estimation of the horizontal scale sizes. This method of deriving neutral GW characteristics through radio measurement technique is effective for the daytime conditions and opens up new possibilities of investigations of the wave dynamical behaviour in the upper atmosphere during all weather conditions.
dc.description.statementofresponsibility by Subir Mandal, Duggirala Pallamraju, Deepak K. Karan, Kedar A. Phadke, Ravindra P. Singh and Pradip Suryawanshi
dc.language.iso en en_US
dc.publisher Wiley en_US
dc.subject Gravity waves en_US
dc.subject OI 630.0nm dayglow en_US
dc.subject Radio techniques en_US
dc.subject Imaging Spectrographs en_US
dc.subject Isoelectron density contours en_US
dc.title On deriving gravity wave characteristics in the daytime upper atmosphere using radio technique en_US
dc.type Article en_US
dc.relation.journal Journal of Geophysical Research: Space Physics

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