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Browsing by Author "Sastry, Ch. V"

Browsing by Author "Sastry, Ch. V"

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  • A Broadband Low Frequency Radio Telescope at Gauribidanur 
    Subramanian, K. R; Nanje gowda, C; Hameed, A. T. A; Sastry, Ch. V (Astronomical Society of Indian, 1986-12)
    A broadband radio telescope operating at decameter wavelengths built at Gauribidanur India, primarily for the study of solar radio emission, is described.
  • The Decameter and Meter Wave Radiotelescopes in India and Mauritius 
    Sastry, Ch. V (Springer, 1995-05)
    The Indian Institute of Astrophysics and the Raman Research Institute in a joint collaboration program operate the Gauribidanur radio observatory. Details of the various radiotelescopes available at the observatory are ...
  • Decameter radio emission from Jupiter and solar activity 
    Sastry, Ch. V (Elsevier Science, 1968-09)
    It is found that there is an apparent increase in solar activity prior to the emission of decametric radio bursts from Jupiter during years of high solar activity. It is pointed out that Jupiter data contains artificial ...
  • The decameter-wave radio telescope 
    Sastry, Ch. V (Astronomical Society of India, 1983-06)
  • Decametric radio spectra of some galaxies in clusters 
    Subramanian, K. R; Sastry, Ch. V (Astronomical Society of Indian, 1988-12)
    Observations of 12 radio sources identified with clusters of galaxies were made in 1983-84 with a decameter-wave radio telescope. The measured flux densities at 34.5 MHz are combined with other low frequency measurements ...
  • Diffuse radio emission from the coma cluster of galaxies at decametre wavelengths 
    Sastry, Ch. V; Shevgaonkar, R. K (Indian Academy of Sciences, 1983-03)
    We have observed the region of the Coma cluster at 34.5 MHz with a resolution of 26 arcmin × 40 arcmin. A map of the diffuse halo (Coma C) is presented. The size of the halo is found to be 54 arcmin × 30 arcmin. The position ...
  • Eclipse Observations of Compact Sources in the Outer Solar Corona 
    Ramesh, R; Subramanian, K. R; Sastry, Ch. V (Kluwer Academic Publishers, 1999-03)
    We report here on high angular resolution observations of solar noise storm sources at a frequency of 75MHz. The data for the study were obtained at the Gauribidanur Radio Observatory (long.: 77 deg26'12''E, lat.: 13 ...
  • The Equatorial Background Solar Corona during Solar Minimum 
    Ramesh, R; Nataraj, H. S; Kathiravan, C; Sastry, Ch. V (University of Chicago Press, 2006-09)
    We report two-frequency (51 and 77 MHz) radio observations of the equatorial brightness distribution of the “undisturbed” solar corona, close to the minimum between sunspot cycles 22 and 23. The contributions from different ...
  • Estimation of coronal magnetic fields using Type-I emission 
    Gopalswamy, N; Thejappa, G; Sastry, Ch. V; Tlamicha, A (Czechoslovakia Academy of Sciences, 1986-03)
    The radial dependence of the coronal magnetic field above active regions is calculated using Type-I chain data existing in the literature. Assuming that Type-I emission is due to shock waves, the upstream shock velocity ...
  • Estimation of magnetic field in the solar coronal streamers through low frequency radio observations 
    Ramesh, R; Subramanian, K. R; Sastry, Ch. V (Gordon Breach Science, 2000)
  • Estimation of magnetic field in the solar coronal streamers through low frequency radio observations 
    Ramesh, R; Kathiravan, C; Sastry, Ch. V (Institute of Physics, 2010-03)
    The observations of circularly polarized thermal radio emission from solar coronal streamers at two low frequencies, viz., 77 and 109 MHz, are used to estimate the magnetic field strength (B) at their corresponding radial ...
  • An estimation of the plasma parameters in the solar corona using quasi-periodic metric type III radio burst emission 
    Ramesh, R; Satya Narayanan, A; Kathiravan, C; Sastry, Ch. V; Shankar, N. U (EDP Sciences, 2005-02)
    We report radio observations of quasi-periodic type III burst emission from the solar corona in close association with the 2B/X2.8 flare of December 11, 2001 at two frequencies (151.5 and 109 MHz). The measured mean period ...
  • Fine structure in solar decametric radiation 
    Thejappa, G; Sastry, Ch. V; Gopalswamy, N (Harwood Academic Publishers, 1984)
    Observations and interpretations of some of the fine structure in decametric solar radio emission -such as (1) the time structure of type III bursts, (2) absorption bursts, and (3) slowly drifting spikes -are presented. ...
  • First results from the Gauribidanur Radio heliograph 
    Subramanian, K. R; Ramesh, R; Sundararajan, M. S; Sastry, Ch. V (Kluwer Academic Publishers, 1996-03)
    Observations of the Sun at two frequencies (51 and 77 MHz) using the East-West arm of the Gauribidanur Radio heliograph are presented.
  • The frequency drift and time splitting of decameter solar radio bursts 
    Sastry, Ch. V (Gordon and Breach, Science Publishers Ltd., 1972-05)
    The frequency drift and time splitting of solar radio bursts are observed with a multi-channel radiometer and a polarimeter at frequencies around 25 MHz. It is found that a majority of noise storm bursts have drift ...
  • The Gauribidanur radio observatory 
    Sastry, Ch. V (National Institute of Science Communication and Information Resources, 1989-08)
    The Raman Research Institute and the Indian Institute of Astrophysics in a joint collaboration program operate the Gauribidanur radio observatory. Details of the various antenna arrays and receiver systems available at the ...
  • The Gauribidanur Radioheliograph 
    Ramesh, R; Subramanian, K. R; Sundararajan, M. S; Sastry, Ch. V (Kluwer Academic Publishers, 1998-08)
    A new radio heliograph for obtaining two-dimensional images of the solar corona sequentially at many frequencies in the range 40-150 MHz has been built by the Indian Institute of Astrophysics at the Gauribidanur Radio ...
  • The Gauribidnur acousto optic spectrometer 
    Subramanian, K. R; Ebenezer, E; Sastry, Ch. V (Tata McGraw- Hill, 1994-07)
    An acousto optic spectrometer (ADS) with 30 MHz bandwidth and 1760 channels used for obtain-_ ing the dynamic spectra of solar radio bursts at Gauribidanur is described.
  • High Angular Resolution Radio Observations of the Outer Solar Corona 
    Ramesh, R; Subramanian, K. R; Sastry, Ch. V (Elsevier, 2000)
    We report high angular resolution observations of the outer solar corona carried out at 75 MHz from the Gauribidanur Radio Observatory (Long: 77°26'12" E, Lat: 13°36'12" N) about 100 km north of Bangalore, India, during ...
  • Imaging With The Mauritius Radio Telescope Challenges and Results 
    Udaya Shankar, N; Golap, K; Sachdev, S; Dodson, R; Katwaroo, M; Sastry, Ch. V (Springer, 2002)
    The Mauritius Radio Telescope (MRT) has been built with the main objective of surveying the southern sky at meter wavelengths. MRT is a Fourier synthesis, T-shaped non-coplanar array. It consists of a2048 m long East-West ...

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