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  • Solar flare 1982 April 14 
    Bagare, S. P (Astronomical Society of India, 1985-12)
    We have obtained a good time sequence of spectroheliograms and spatial sequence spectra in the K-line of Ca II using the Kodaikanal tower telescope. We have derived the two dimensional pattern of the mass motions of the ...
  • Solar flare effects on the geomagnetic elements during normal and counter electrojet periods 
    Rastogi, R. G; Pathan, B. M; Rao, D. R. K; Sastry, T. S; Sastri, J. H (Terra Scientific Publishers, 1999-09)
    During a strong and normal electrojet event time, sfeconsists of a positive impulse in Hat all stations, the amplitude of Hfollowing the latitudinal variation similar to that of the quiet day monthly mean, Sq(H). The sfein ...
  • Solar forcing on the changing climate 
    Hiremath, K. M (Balkan, Black Sea and Caspian Sea, 2009-04)
    The influence of solar cycle and activity phenomena on the two climatic variabilities such as the rainfall and the surface temperature of the Indian subcontinent is critically examined. It is concluded from this study that ...
  • Solar G-band observations at Merak, Leh/Ladakh 
    Vasantharaju, N; Dorjey, N; Ravindra, B; Prabhu, K; Rangarajan, K. E; Prabhu Ramkumar, B; Sankarasubramanian, K (Indian Institute of Astrophysics, 2012)
    G-band observations are important for the study of dynamics of magnetic features in the solar photosphere and they are carried out using large telescopes, larger than 30 cm. We installed a 40 cm DFM telescope at one of ...
  • Solar granulation and speckle interferometry 
    Gupta, K. G; Pande, M. C (Astronomical Society of India, 1992)
    The status of various applications of speckle interferometry and imaging to the study of solar granulations as well as solar activity is reviewed. The physical aspects of solar granulations are examined, with emphasis on ...
  • Solar imaging and image processing : tolerance analysis of SUIT optics and implementation of different image processing approaches 
    Chatterjee, Subhamoy (Indian Institute of Astrophysics, 2014-07)
    Imaging sun in different wavelengths is invaluable for understanding its dynamic aspects and relevent impacts on space weather. The atmosphere of the Sun presents a number of puzzling physical phenomena of great importance. ...
  • Solar influence on barometric pressure 
    Rangarajan, S (Indian Meteorological Department, 1954-07)
  • Solar Limb Gradient from Eclipse Spectra of February 15, 1961 
    Kubicela, Aleksandar (Kodaikanal Observatory, 1969-05)
    On the occasion of the total solar eclipse of February 15, 1961 two spectrograms contain a smooth transition of the photospheric spectrum into the chromospheric one and vice versa. Continual registration has been achieved ...
  • Solar log gf values for the spectral lines in the range λ λ 6209-6273 Å 
    Stalin, C. S; Sinha, K; Sanwal, B. B (Astronomical Society of India, 1997)
    Utilizing Lieze solar atlas and solar photospheric models, we derived log gf values for the spectral lines in the wavelength range λλ 6209 - 6273 Å. These values, intended for use in a future study of high resolution reticon ...
  • Solar log gf values in the infrared J and H bands 
    Stalin, C. S; Trivedi, C; Sinha, K; Sanwal, B. B (Astronomical Society of India, 1997)
    Solar IR spectra have been utilized to derive log gf values for atomic lines due to 17 chemical elements. From a recent publication in Astronomy and Astrophysics Supplement, we selected unblended solar lines in the infrared ...
  • Solar magnetic field and rotation 
    Gokhale, M. H (Indian Institute of Astrophysics, Bangalore, 1988)
    Sun’s highly inhomogeneous asymmetrical, and time dependent magnetic field plays a vital role in the non-Radiative energy transport that maintains the inhomogeneous asymmetrical and time dependent atmosphere of the sun ...
  • The Solar Magnetometer of Kodaikanal Observatory 
    Bhattacharyya, J. C (Kodaikanal Observatory, 1970-10)
    An instrument capable of measurement of weak longitudinal component of magnetic fields on the sun has been designed and constructed for operation with the horizontal solar telescope and high dispersion spectrograph of ...
  • Solar mean magnetic field of the chromosphere 
    Vishnu, M; Nagaraju, K; Mathur, Harsh (Indian Academy of Sciences, 2023-12)
    The Solar Mean Magnetic Field (SMMF) is the mean value of the line-of-sight (LOS) component of the solar vector magnetic field averaged over the visible hemisphere of the Sun. So far, the studies on SMMF have mostly been ...
  • Solar meridional circulation from twenty-one years of SOHO/MDI and SDO/HMI observations Helioseismic travel times and forward modeling in the ray approximation 
    Liang, Zhi-Chao; Gizon, L; Birch, A. C; Duvall, T. L. Jr; Rajaguru, S. P (EDP Sciences, 2018-11)
    Context. The solar meridional flow is an essential ingredient in flux-transport dynamo models. However, no consensus on its subsurface structure has been reached. Aims. We merge the data sets from SOHO/MDI and SDO/HMI ...
  • Solar models with helioseismologically correct sound speed profile 
    Ajukov, S. V; Baturin, V. A (Astronomical Society of India, 1996)
    The problem of computation of the model of the present Sun with given sound speed profile in the solar radiative zone is considered. It is shown that the chemical composition is still a free parameter but the entropy of ...
  • Solar neutrino flux variation and its implications 
    Raychaudhuri, Probhas (Astronomical Society of India, 1996)
    Considering the solar neutrino flux data during the period from June 1989 to April 1992 from four solar neutrino experiments (Cl Solar neutrino experiment, SAGE I & II, GALLEX, Kamiokande II & III) we suggest that the ...
  • Solar Neutrino Puzzle 
    Sarma, K. V. L (Indian Institute of Astrophysics, Bangalore, 1988)
  • Solar noise burst of 11 April 1952 and associated ionospheric and magnetic disturbances 
    Das, A. K (The Manager of Publications, 1952-07)
  • Solar observational programs and facilities at UPSO, Naini Tal 
    Gaur, V. P; Verma, V. K; Uddin, W (Astronomical Socity of India, 1998)
    We present here the overview of the solar facilities at the U.P. State Observatory, Naini Tal, which have been developed over years for the observations of solar activity phenomena. The various backend instruments and the ...
  • Solar Optical Observations from Kodaikanal and from Eclipses 
    Singh, J (Indian Institute of Astrophysics, Bangalore, 1986)
    From an analysis of a long series of Calcium K spectroheliograms taken at Kodaikanal, systematic changes in the sizes of supergranule cells have been found. The average cell size changes with the phase of solar cycle, being ...

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