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Browsing by Author "Yellaiah, G"

Browsing by Author "Yellaiah, G"

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  • Latitude character and evolution of Gnevyshev gap 
    Pandey, K. K; Hiremath, K. M; Yellaiah, G (Springer, 2017-06)
    The time interval, between two highest peaks of the sunspot maximum, during which activity energy substantially absorbed is called Gnevyshev gap. In this study we focus on mysterious evolution of the Gnevyshev gap by ...
  • Latitudinal distribution of soft x ray flares and dispairty in butterfly diagram 
    Pandey, K. K; Yellaiah, G; Hiremath, K. M (Springer, 2015-04)
    We present statistical analysis of about 63000 soft x-ray flare (class ≥C) observed by geostationary operational environmental satellite (GOES) during the period 1976-2008. Class wise occurrence of soft X-ray (SXR) flare ...
  • Lowering of asymmetry 
    Pandey, K. K; Hiremath, K. M; Yellaiah, G (Indian Academy of Sciences, 2017-03)
    Asymmetry, a well established fact, can be extracted from various solar atmospheric activity indices. Although asymmetry is being localized within short time scale, it also persists at different time scales. In the present ...
  • Meteoric activity over a low latitude station, Hyderabad 
    Yellaiah, G; Lokanadham, B (Astronomical Society of India, 1993)
    he radio observations of sporadic meteors, carried out during the period 1983-88, have been studied.
  • Mid-term periodicities in solar radio emission corresponding to sunspot number during solar cycle 23 
    Aroori, Mahender; Vemareddy, P; Chowdhury, Partha; Yellaiah, G (Springer, 2021-03)
    We present a systematic time-series analysis of solar radio emission in nine different frequencies to compare with that of daily sunspot number (SSN) during Solar Cycle 23 (1996-2009). Owing to the contribution from quiet-sun ...
  • Radio observations of quadrantid meteor shower 
    Yellaiah, G; Lodanadham, B (Astronomical Society of India, 1993)
    The radio observations of quadrantid meteor shower obtained during the period 1983-88 have been analyzed. Diurnal as well as yearly variations in the quadrantid meteor shower activity have been studied.
  • Satellite Radio Beacon Study of the Ionospheric Variations at Hyderabad during the Total Solar Eclipse of Februrary 16, 1980 
    Tyagi, Tuhi Ram; Singh, Lakha; Vijaykumar, P. N; Somayajulu, Y. V; Lokanadham, B; Yellaiah, G (Tata Institute of Fundamental Research, Bombay, 1980-06)
    Preliminary results of observations, made on the eclipse day (Feb. 16, 1980) at Hyderabad, on the amplitude and phase of 136 MHz transmissions of the geostationary satellite ETS-II are presented by the eclipse. The percentage ...
  • A Statistical Study of Low-Frequency Solar Radio Type III Bursts 
    Mahender, A; Sasikumar Raja, K; Ramesh, R; Panditi, V; Monstein, C; Yellaiah, G (Springer, 2020-11)
    We have studied low-frequency (45 – 410 MHz) type III solar radio bursts observed using the e-Compound Astronomical Low-cost Low-frequency Instrument for Spectroscopy and Transportable Observatory (e-CALLISTO) spectrometer ...
  • Study of Es occurrences during meteor shower periods at Hyderabad by using FM radio signals 
    Yellaiah, G; Suresh, K; Raghavender, B (Astronomical Society of India, 2001)
    Sporadic-E occurrences are found to be more during meteor shower periods when compared to non-shower periods. Meteor activity can be estimated by recording the radio signals reflected by meteor trails. In the present paper, ...

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