NDLI: Low latitude E-region irregularities studied using Gadanki radar, ionosonde and in situ measured electron density

Content Provider	Springer Nature Link
Author	Phani Kumar, D. V. Patra, A. K. Kwak, Y. S. Kim, K. H. Yellaiah, G.
Copyright Year	2009
Abstract	In this paper, we attempt to identify the driving forces responsible for the generation of low-latitude E-region field-aligned irregularities (FAIs). It is evident that the low-latitude E-region FAIs occur both during the day and night with preferential occurrence being most during local sunrise period. Simultaneous measurements are made with Gadanki radar and nearby located Ionosonde for understanding the low-latitude Es–FAIs relationship. The observations suggest that the occurrence and SNR of FAIs have a close relationship with f t E s −−f b E s . Finally, using the past electron density profiles and reasonable values of electric field, we have shown that it is generally difficult with the gradient drift instability to explain low-latitude E-region FAIs when electric field alone is considered as driving agency. We hypothesize that neutral winds play important role for the generation of irregularities at low latitudes outside the electrojet belt either by forming sharp Es layers or by enhancing the differential drift of electrons and ions or by both.
Starting Page	225
Ending Page	233
Page Count	9
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	323
Issue Number	3
e-ISSN	1572946X
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-07-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Equatorial ionosphere Ionospheric irregularities Plasma waves and instabilities Astronomy, Observations and Techniques
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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