1. Home
    2. Journals
    3. Journal of Astrophysics and Astronomy
    4. Volume 40
    5. Issue 6

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/040/06/0049

    • Keywords

       

      Very low frequency waves; whistlers; ionospheric/plasmaspheric parameters; low latitude.

    • Abstract

       

      We present results of the first time observations of whistlers during day time (sunrise) on 4th January 2017 at 01 UT(UT$+$5.30 $=$ IST) at Indian low latitude ground station Varanasi (geomag. lat. 14$^{\prime}$55$^{\prime}$ N, geomag. long. 153$^{\prime}$54$^{\prime}$ E, L.1.078). The main goal of analysis is to study the propagation characteristic of the observed whistlers during the day time (sunrise). These whistlers were observed during the quiet geomagnetic conditions (Dst-index $=$ $–$8 nT). The dispersions of the observed whistlers are found between 11.16 and 14.78 s$^{1/2}$, which shows that the observed whistlers have propagated in the ducted mode and the whole propagation path of whistlers lies in the ionosphere. Their columnar ionospheric electron contents lie between 23.57 TECU and 39.44 TECU. The ionospheric parameters derived from whistler data at Varanasi compare well with othermeasurements made by other techniques.

    • Author Affiliations

       

      S. B. SINGH1 S. S. RAO1 A. K. SINGH1

      1. Department of Physics, Atmospheric Research Lab., Banaras Hindu University, Varanasi 221 005, India.

    • Dates

       
      Published
      15 December 2019
      Manuscript received
      27 August 2019
      Accepted
      15 November 2019
      Final version published online
      5 December 2019

  • 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

© 2023-2024 Indian Academy of Sciences, Bengaluru.

Contact | Site index