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  • A study of density modulation index in the inner heliospheric solar wind during solar cycle 23 
    Bisoi, Susanta Kumar; Janardhan, P.; INGALE, MADHUSUDAN; SUBRAMANIAN, PRASAD; Ananthakrishnan, S.; Tokumaru, M.; Fujiki, K. (IOP Publishing, 2014-10)
    The ratio of the rms electron density fluctuations to the background density in the solar wind (density modulation index, epsilon N ≡ ΔN/N) is of vital importance for understanding several problems in heliospheric physics ...
  • Coronal turbulence and the angular broadening of radio sources – the role of the structure function 
    INGALE, MADHUSUDAN; SUBRAMANIAN, PRASAD; Cairns, Iver (Oxford University Press, 2015-03)
    The amplitude of density turbulence in the extended solar corona, especially near the dissipation scale, impinges on several problems of current interest. Radio sources observed through the turbulent solar wind are broadened ...
  • Amplitude of solar wind density turbulence from 10 to 45 R⊙ 
    Raja, K. Sasikumar; INGALE, MADHUSUDAN; Ramesh, V; SUBRAMANIAN, PRASAD; Manoharan, P. K.; Janardhan, P. (American Geophysical Union, 2016-12)
    We report on the amplitude of the density turbulence spectrum ( urn:x-wiley:jgra:media:jgra53108:jgra53108-math-0001) and the density modulation index (δN/N) in the solar wind between 10 and 45R⊙. We derive these quantities ...
  • Turbulent Density Fluctuations and Proton Heating Rate in the Solar Wind from 9–20 R ⊙ 
    Raja, K. Sasikumar; SUBRAMANIAN, PRASAD; Ramesh, R.; Vourlidas, Angelos; INGALE, MADHUSUDAN (IOP Publishing, 2017-11)
    We obtain scatter-broadened images of the Crab Nebula at 80 MHz as it transits through the inner solar wind in 2017 and 2016 June. These images are anisotropic, with the major axis oriented perpendicular to the radially ...
  • Dissipation Scale Lengths of Solar Wind Turbulence 
    Raja, K. Sasikumar; SUBRAMANIAN, PRASAD; INGALE, MADHUSUDAN; Ramesh, R. (IOP Publishing, 2019-02)
    Knowing the lengthscales at which turbulent fluctuations dissipate is key to understanding the nature of weakly compressible magnetohydrodynamic turbulence. We use radio wavelength interferometric imaging observations that ...
  • Global Solar Magnetic Field and Interplanetary Scintillations During the Past Four Solar Cycles 
    Raja, K. Sasikumar; Janardhan, P.; Bisoi, Susanta Kumar; INGALE, MADHUSUDAN; SUBRAMANIAN, PRASAD; Fujiki, K.; Maksimovic, Milan (Springer Nature, 2019-09)
    The extended minimum of Solar Cycle 23, the extremely quiet solar-wind conditions prevailing and the mini-maximum of Solar Cycle 24 drew global attention and many authors have since attempted to predict the amplitude of ...
  • Turbulent Proton Heating Rate in the Solar Wind from 5–45 R⊙ 
    Raja, K. Sasikumar; SUBRAMANIAN, PRASAD; INGALE, MADHUSUDAN; Ramesh, R.and; Maksimovic, Milan (IOP Publishing, 2021-06)
    Various remote sensing observations have been used so far to probe the turbulent properties of the solar wind. Using the recently reported density modulation indices that are derived using angular broadening observations ...

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