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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Solar Radio Spectro-polarimeter (50–500 MHz). I. Design, Development, and Characterization of a Cross-polarized, Log-periodic Dipole Antenna 
    Kumari, Anshu; Gireesh, G. V. S; Kathiravan, C; Mugundhan, V; Barve, Indrajit V; Ramesh, R; Monstein, C (American Astronomical Society, 2023-12-01)
    The Zeeman effect has been routinely used to image and quantify the solar photospheric magnetic field (B). Such a direct measuring technique is not yet available for the corona (Lin et al. 2004). Since almost all ...
  • Solar rotation and solar wind magnetosphere coupling 
    Georgieva, K; Kirov, B; Javaraiah, J; Krasteva, R (Elsevier, 2005-03)
    This paper deals with three characteristics of the interplanetary magnetic field (IMF), important for solar wind magnetosphere coupling and related to solar rotation: the IMF azimuthal component, the IMF total magnitude, ...
  • Solar rotation, earth rotation and solar wind 
    Kirov, B; Georgieva, K; Javaraiah, J (European Space Agency, 2003-09)
    It is generally accepted that the annual variation in the Earth's rotation rate is fully determined by large-scale seasonal changes in atmospheric circulation. We demonstrate that the oscillations of both the Earth's ...
  • Solar soft X-ray irradiance variability, I: segmentation of Hinode/XRT full-disk images and comparison with GOES (1 - 8 Å) X-ray flux 
    Adithya, H. N; Kariyappa, R; Shinsuke, Imada; Kanya, Kusano; Zender, Joe; Dame, Luc; Gabriel, Giono; DeLuca, Edward; Weber, Mark (Springer, 2021-04)
    It is of great interest and importance to study the variabilities of solar EUV, UV and X-ray irradiance in heliophysics, in Earth’s climate, and space weather applications. A careful study is required to identify, track, ...
  • Solar spectral fine structure in 18 - 23 GHz band 
    Cecatto, J. R; Subramanian, K. R; Sawant, H. S (Brazilian Physical Society, 1999-09)
    On 30th June 1989 high sensitivity-spectral resolution observations of solar radio bursts were carried out in the frequency range of 18 - 23 GHz. The burst observed at 17:46 UT was different from the 60 bursts observed so ...
  • Solar spectropolarimetry of Ca II 8542 Å line: polarimeter development, calibration, and preliminary observations 
    Hemanth, P; Nagaraju, K; Ravindra, B; Ramesh, K. B (SPIE-The International Society for Optical Engineering, 2018-11)
    Chromospheric magnetic fields are of paramount importance in understanding the dynamics of energetic events in the solar atmosphere. At the Kodaikanal Solar Observatory, several polarimeters were developed in the past to ...
  • Solar Supergranulation and two-dimensional Hydrodynamic Turbulence 
    Krishan, V (Indian Institute of Astrophysics, Bangalore, 1988)
    In a two-dimensional incompressible fluid, the total energy as well as the total squared vorticity called enstrophy is conserved. It is found that the energy spectrum in two-dimensional hydrodynamic turbulence cascades to ...
  • Solar tides in the F2 region over Kodaikanal 
    Thiruvengadathan, A (Manager of Publications Civil Lines Delhi, 1955-08)
  • Solar Type IIIb Radio Bursts as Tracers for Electron Density Fluctuations in the Corona 
    Mugundhan, V; Hariharan, K; Ramesh, R (Springer, 2017-11)
    We present an estimation of the electron density modulation index ( δN Nee ) for the first time using solar type IIIb radio burst observations. The mean value of δN Nee is calculated to be ≈ 0.006 ± 0.002 over the ...
  • The Solar Ultra-Violet Imaging Telescope (SUIT) Onboard Intelligence for Flare Observations 
    Varma, Manoj; Padinhatteri, Sreejith; Sinha, Sakya; Tyagi, Anurag; Burse, Mahesh; Yadav, Reena; Kumar, Ghanshyam; Ramaprakash, Anamparambu; Tripathi, Durgesh; Sankarasubramanian, K; Nagaraju, K; Vadodariya, Koushal; Tadepalli, Srikar; Deogaonkar, Rushikesh; Olekar, Manjunath; Azaruddin, Mohamed; Unnikrishnan, Amrita (Springer, 2023-02)
    Aditya-L1 is India’s first observatory-class solar space mission to study the Sun from the Lagrange L1 point. The Solar Ultra-Violet Imaging Telescope (SUIT) is one of the payloads onboard Aditya-L1. SUIT is an off-axis ...
  • Solar Ultraviolet Flux Variation in the Biological Band during the Total Solar Eclipse of October 24, 1995 
    Niranjan, K; Thulasiraman, S; Reddy, Y. S (Indian Institute of Astrophysics, Bangalore, 1997)
    Solar UV B Flux measurements have been made at four discrete wavelengths of 290, 300, 310 and 320 nm during and around the solar eclipse day of 24th October 1995. The Diurnal variation of the UV flux has shown the recovery ...
  • The Solar Ultraviolet Imaging Telescope on-board Aditya-L1 
    Murthy, J; Rahna, P. T; Sutaria, F. K; Safonova, M; Gudennavar, S. B; Bubbly, S. G (Current Science Association, 2017-08)
    The Solar Ultraviolet Imaging Telescope (SUIT) is an instrument onboard the Aditya-L1 spacecraft, the first dedicated solar mission of the Indian Space Research Organization (ISRO), which will be put in a halo orbit at the ...
  • The solar ultraviolet imaging telescope onboard Aditya-L1 
    Ghosh, Avyarthana; Chatterjee, Subhamoy; Khan, Aafaque R; Tripathi, Durgesh; Ramaprakash, A. N; Banerjee, D; Chordia, P; Gandorfer, Achim; Krivova, N.A; Nandy, D; Rajarshi, Chaitanya; Solanki, S. K; Sriram, S (SPIE-The International Society for Optical Engineering, 2016-07)
    The Solar Ultraviolet Imaging Telescope (SUIT) is an instrument onboard the Aditya-L1 spacecraft, the first dedicated solar mission of the Indian Space Research Organization (ISRO), which will be put in a halo orbit at the ...
  • The Solar Ultraviolet Imaging Telescope: detector characterization and readout electronics testing 
    Varma, Manoj; Tyagi, Anurag; Joshi, Bhushan; Yadav, Reena; Chordia, Pravin; Kumar, Ghanshyam; Sinha, Sakya; Burse, Mahesh; Padinhatteri, Sreejith; Deogaonkar, Rushikesh; Ramaprakash, A. N; Ghosh, Avyarthana; Tripathi, Durgesh; Sarkar, Janmejoy; Sankarasubramanian, K; Nagaraju, K; Vadodariya, Koushal; Kesharwani, Ravi; Khan, Aafaque; Olekar, Manjunath; Azaruddin, Mohamed (Oxford University Press on behalf of the Royal Astronomical Society, 2023-01)
    The Solar Ultraviolet Imaging Telescope (SUIT) is one of the payloads onboard the Aditya-L1 mission. It will perform full disc imaging of the Sun in the near-ultraviolet (UV) wavelength range of 200–400 nm. This provides ...
  • Solar variability in the CaII K during solar cycles 21 and 22 
    Sivaraman, K. R; Gupta, S. S; Kariyappa, R; Aleem, P. S. M; Sundararaman, K (Astronomical Society of India, 1993)
    We have monitored the sun in the light of the CaII K line and obtained the disc integrated profiles for the years 1974-91. From these profiles we have estimated the variability of the sun as a star as seen in the various ...
  • Solar wave-length displacements observed at the Japan eclipse 
    Royds, T (Royal Astronomical Society, 1936-06-19)
  • Solar wind associated with near equatorial coronal Hole 
    Hegde, M; Hiremath, K. M; Doddamani, V. H; Gurumath, S. R (2015-09)
    Present study probes temporal changes in the area and radiative flux of near equatorial coronal hole associated with solar wind parameters such as wind speed, density, magnetic field and temperature. Using high temporal ...
  • Solar wind flow associated with stream-free sector boundaries at 1 AU 
    Sastri, J. H (Kluwer Academic Publishers, 1987-09)
    The correlations between the plasma characteristics of the solar wind flow in the vicinity (± 12 hr) of stream-free sector boundaries near Earth are examined using the composite data base of interplanetary plasma for the ...
  • Solar X-ray bursts 
    Rausaria, R. R (Indian Institute of Astrophysics, Bangalore, 1988)
    The experimental results of X-ray bursts about spectral characteristics, spatial distribution and directivity measurements carried out with PVO/ISEE-3 spacecraft imaging instruments of HXIS and Hard X-ray burst spectrometers ...
  • Solar X-Ray Spectral Irradiance Variability 
    Ramesh, K. B; Sundararaman, K (Springer, 2006-04)
    Solar spectral irradiance at X-ray wavelengths show large variations over a period of solar cycle. We use X-ray irradiance data in three narrow spectral regimes deduced from Yohkoh SXT measurements to study coronal irradiance ...

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