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| Organization | |
|---|---|
| Location | Gauribidanur,Karnataka, India |
| Coordinates | 13°36′N77°26′E / 13.6°N 77.43°E /13.6; 77.43 |
| Established | 1976  |
| Website | www |
| Telescopes |
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  Location of Gauribidanur Radio Observatory | |
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 Related media on Commons | |
TheGauribidanur Radio Observatory is a radio telescope observatory located atGauribidanur, nearBengaluru. It is operated jointly byRaman Research Institute and theIndian Institute of Astrophysics. The observatory has been in operation since 1976.
The Gauribidanur Observatory is located atGauribidanur inChikkaballapur district(Latitude:13.60° N; Longitude:77.44° E), 100 km north ofBengaluru.[1]
The observatory’s solar observations at decameter (~100 MHz) and metre (~20 MHz) wavelengths date back to the early 1950s atKodaikanal, using Yagi antenna arrays under the Kodaikanal Yale project. The Gauribidanur site was established in 1976 to install the Gauribidanur Telescope, a 1000‑dipole array in a T-shaped layout and has been continuously monitoring the Sun and Pulsars in radio frequencies since that time.[2]
In 2024, researchers at the Gauribidanur observatory demonstrated that low-cost commercial dish TV antennas operating at 11.2 GHz could be repurposed to measure theSun’s magnetic field in thesolar chromosphere, bridging a critical observational gap between the photosphere andcorona. According to Prof. R. Ramesh of theIndian Institute of Astrophysics, these daily radio observations. Unlike optical ones restricted to eclipses, allow continuous tracking of solar magnetic fields, essential for understanding and forecastingcoronal mass ejections (CMEs) and space weather.[3]
A few observations with the array have been the first two-dimensional images of radio emission from slowly varying discrete sources in the outersolar corona, an all-sky survey of radio sources at 34.5 MHz in the declination range -30° S to 60° N, and a low frequency carbon recombination lines in astrophysical sources. Studies have also been done of gaseous remnants of exploding stars and the apparently vacant space between members of a cluster of galaxies. Currently, the studies are targeted atpulsars.[4]
The Gauribidanur Observatory has a 6-meterradio telescope, a radioheliograph, a high resolution radio spectrograph and a gravitational laboratory.
The Gauribidanur Telescope is a decameter wave radio telescope. It consists of 1000 dipoles arranged in a "T" configuration. It consists of 1.4 km East-West Arm and a 0.5 km South Arm.[5]
The Gauribidanur Radio Heliograph is a radioheliograph used to obtain two dimensional pictures of the outer solar corona at frequencies from 40-150 MHz. It has been operating since 1997. It consists of 192 log-periodic dipoles arranged in a "T" configuration.[6]
