1. Home
    2. Journals
    3. Journal of Astrophysics and Astronomy
    4. Volume 38
    5. Issue 1

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/038/01/0016

    • Keywords

       

      Radio interplanetary scintillation; solar wind; turbulence; space weather events; coronal mass ejections; propagation; disturbances; shock waves.

    • Abstract

       

      In this paper, we review the results of interplanetary scintillation (IPS) observations made with the legacy system of the Ooty Radio Telescope (ORT) and compare them with the possibilities opened by the upgraded ORT, the Ooty Wide Field Array (OWFA). The stability and the sensitivity of the legacy system of ORT allowed the regular monitoring of IPS on a grid of large number of radio sources and the results of these studies have been useful to understand the physical processes in the heliosphere and space weather events, such as coronal mass ejections, interaction regions and their propagation effects. In the case of OWFA, its wide bandwidth of 38 MHz, the large field-of-view of $\sim$27$^\circ$ and increased sensitivity provide a unique capability for the heliospheric science at 326.5 MHz. IPS observations with the OWFA would allow one to monitor more than 5000 sources per day. This, in turn, will lead to much improved studies of space weather events and solar wind plasma, overcoming the limitations faced with the legacy system. We also highlight some of the specific aspects of the OWFA, potentially relevant for the studies of coronal plasma and its turbulence characteristics.

    • Author Affiliations

       

      P. K. Manoharan1 C. R. Subrahmanya2 J. N. Chengalur3

      1. Radio Astronomy Centre, NCRA-TIFR, P.O. Box 8, Ooty 643 001, India.
      2. Raman Research Institute, C. V. Raman Avenue, Sadashivnagar, Bengaluru 560 080, India.
      3. NCRA-TIFR, Pune University Campus, Ganeshkhind, Pune 411 007, India.

    • Dates

       
      Published
      15 March 2017
      Manuscript received
      21 July 2016
      Accepted
      25 August 2016

  • Journal of Astrophysics and Astronomy | News

    • Continuous Article Publication

      Posted on January 27, 2016

      Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2022-2023 Indian Academy of Sciences, Bengaluru.

Contact | Site index