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Ann. Geophys., 22, 2033-2036, 2004
www.ann-geophys.net/22/2033/2004/
© European Geosciences Union 2004
In situ measurements of sub-meter plasma waves over low-latitude ionosphere during Leonid-99 meteor storm
S. P. Gupta, R. Sekar, and Y. B. Acharya
Physical Research Laboratory, Ahmedabad 380 009, India
Abstract. In situ probe measurements of plasma parameters were carried out on 18 and 20
November 1999 from Sriharikota, India, a low-latitude rocket launching
station to investigate the effect of a Leonid meteor storm. Results obtained
on plasma waves using a high frequency Langmuir probe are discussed. The
characteristics of the sub-meter scale size plasma waves observed for the
first time during Leonid meteor storm are presented. Based on the results
obtained from both the rocket flights and comparison with the results
obtained from previous rocket flights from the same location, it appears
these sub-meter waves are associated with intense meteoric activity. A
possible mechanism based on the dependence of the meteoric activity and its
limitations are discussed.
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