On 21 March 2016, the Indian Space Research Organisation
(ISRO) established the Gadanki Ionospheric Radar Interferometer (GIRI) near
Tirupati in Andhra Pradesh. It was set up at the National Atmospheric Research
Laboratory (NARL) which is an autonomous research institute of the Department
of Space.
Features:
Ø
It is a 30
MHz radar system that will be engaged in meteor and space weather research in a
comprehensive way.
Ø
It consists
of a rectangular antenna array of 160 two-element Yagi-antenna, arranged in a
20×8 matrix, 20 transmitter units, 6 digital receivers including data
processing systems, a radar controller, and a host computer.
Ø
Its primary
objective is to carry out unattended observations towards studying the forcing
from the sun like variation in solar flux, solar flare and magnetic storm on
the ionospheric irregularities.
Ø
It also
seeks to study unattended observations from the underneath atmosphere (e.g.,
waves generated by weather phenomena) on the ionospheric irregularities.
Ø
It will
provide important information on the angular location of plasma irregularities
during the onset phase and its relationship to background ionospheric state
parameters and sunset terminator.
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