RAMAN RESEARCH INSTITUTE’S EXPEDITION TO ARCTIC FOR RADIO FREQUENCY CHARACTERIZATION

TAG: GS 3: SCIENCE AND TECHNOLOGY

THE CONTEXT: The Raman Research Institute (RRI) is set to embark on its first winter Indian expedition to the Arctic region, specifically focusing on examining the radio frequency environment in the Svalbard region.

EXPLANATION:

• This landmark initiative aims to provide insights into the suitability of this Arctic location for conducting precise astronomy measurements, particularly in the field of radio astronomy.

Purpose and Objectives

• The primary goal of this scientific endeavour is to characterize the radio frequency environment in the Svalbard region.
• Researchers from RRI will assess the potential of this uniquely positioned area for carrying out precision astronomy measurements.
• The survey’s findings are anticipated to aid astronomers in evaluating the site’s suitability for deploying low-frequency radio telescopes, enabling them to conduct precise astronomical observations.

RRI’s Contribution and Research Focus

• RRI’s team from the Electronics Engineering Group, will spearhead the examination of the radio frequency environment in Svalbard.
• This survey, a first of its kind at this site, holds promise in potentially paving the way for the establishment of low-frequency radio telescopes in the region.
• The expedition, supported by the Ministry of Earth Sciences and coordinated by the National Centre for Polar and Ocean Research (NCPOR), Goa, is scheduled to take place from December 19, 2023, to January 15, 2024.

Significance of the Survey

• RRI’s focus extends beyond conventional astronomical observations.
• It aims to study the faint cosmological signals emitted from hydrogen during the Cosmic Dawn and the Epoch of Reionization.
• These critical phases in the universe’s early evolution lack substantial observations due to their faintness and interference from various radio frequency sources, including urban infrastructures like cell phone towers and FM/television stations.

SARAS Experiment and Objectives

• The RRI team has been engaged in the development of the Shaped Antenna measurement of the background Radio Spectrum (SARAS) series of experiments for nearly a decade.
• SARAS seeks to detect the faint cosmological 21-cm signal from the Cosmic Dawn and the Epoch of Reionization, shedding light on the universe’s early stages.

Importance of Radio-Quiet Locations

• The success of SARAS experiments in India, conducted in radio-quiet locations like Ladakh and western Karnataka, underscores the significance of such environments for precision cosmological studies.
• However, the expansion of urbanization has limited these locations, necessitating the exploration of new, radio-quiet regions like Svalbard for deploying sensitive radio telescopes.

Technical Approach

• The expedition will utilize sensitive electronic instruments to analyse radio signals in the frequency range of 5 – 500 megahertz (MHz) at accessible sites near Himadri, India’s research station in the Arctic.
• The outcomes will provide critical insights into the radio quietness of the Arctic location, determining its suitability for the deployment of the SARAS radio telescope.
• It is anticipated that this survey will furnish essential information regarding the radio quietness of the Svalbard location, pivotal for deploying sensitive radio telescopes and conducting precise astronomical observations.

Conclusion

• RRI’s participation in the first winter Indian expedition to the Arctic signifies a crucial step in the pursuit of understanding the universe’s early stages.
• Through characterizing the radio frequency environment in the Arctic region, RRI aims to contribute significantly to the advancement of precision astronomy and cosmological studies, potentially unlocking new avenues for groundbreaking discoveries in the field.

SOURCE: https://www.thehindu.com/sci-tech/science/rri-raman-research-institute-bengaluru-to-participate-in-first-winter-indian-expedition-to-arctic-region/article67650029.ece