Abstract
Rocket experiments conducted from Indian rocket ranges namely Thumba (dip = 0.6°S) and Shriharikota (SHAR; dip = 12°N) are discussed. In this paper we present the results of electron density measurements obtained from these two locations during meteor shower days. It was found that over Thumba the electron density layers were observed only during meteor shower days provided the vertical Hall polarization field is directed downward. This means during night and during counter electrojet conditions. While over SHAR the layers have been observed both during day and night. The vertical thickness of these layers is about 5 km and horizontal extend more than 100 km. We suggest that these multilayers are sustained by meteoric ions which have long life time. The meteoric ions acts as tracers for gravity waves.
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