The Gadanki Ionospheric Radar Interferometer (GIRI) has been set up at the National Atmospheric Research Laboratory (NARL) near Tirupati in Andhra Pradesh by The Indian Space Research Organisation (ISRO). NARL is an autonomous research institute of the Department of Space.
Gadanki Ionospheric Radar Interferometer System is a 30 MHz radar system that will be engaged in meteor and space weather research in a comprehensive way. 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.
The main aim of GIRI 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. It also seeks to study unattended observations from the underneath atmosphere (e.g., waves generated by weather phenomena) on the ionospheric irregularities.
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. Investigations made using this facility are expected to improve the skill in Equatorial Plasma Bubble (EPB) forecasting which is detrimental for satellite based navigation/communication applications.
NARL is one of the specialized atmospheric research in the country to conduct basic atmospheric research, indigenous technology development for atmospheric probing and weather and climate modeling. It regularly operates state-of-the-art MST radar, Rayleigh / Mie Lidar, Boundary Layer Lidar, Sodium Lidar, Lower Atmospheric Wind Profiler, Sodar and Dual frequency GPS receiver.
So lets discuss some questions related to this post which can be asked in the upcoming exams :
1. Which Radar system has been launched by ISRO recently ?
2. Expand the term GIRI, NARL and ISRO ?
3. The radar system GIRI is associated with which kind of research ?
Courtesy : Business Standard