Kodaikanal Observatory Publications: Recent submissions

  • High Resolution Observations of Solar Radio and X-Ray Bursts and their Imterpretation 
    Degaonkar, S. S (Indian Institute of Astrophysics, Bangalore, 1986)
    High resolution observations in the radio range from the ground and X-rays from satellites during the past few years have provided new insights into the nature of emission processes and energies of solar eruptions. It is ...
  • 3He Rich Solar Flares 
    Ramadurai, S (Indian Institute of Astrophysics, Bangalore, 1986)
    The various observational features of the 3He rich solar flares like their characteristics and association with other phenomena are discussed. It is shown that 3He rich flares split into two distinct groups, if one plots ...
  • Our Present Understanding of Solar Flares 
    Dwivedi, B. N (Indian Institute of Astrophysics, Bangalore, 1986)
    A general discussion of solar flares with emphasis on two-ribbon flares is given. The basic differences between compact (simple-loop) and two-ribbon flares have also been pointed. Skylab observations have been presented ...
  • Measurement of Solar Magnetic Fields 
    Bhattacharyya, J. C; Balasubramaniam, K. S (Indian Institute of Astrophysics, Bangalore, 1986)
    The paper reviews several methods of estimation of solar magnetic fields so far employed. The possibility of measurement of the vector magnetic fields by using two dimensional detector arrays is discussed. A program for ...
  • 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 ...
  • Ca II K Emission from the Solar Chromosphere 
    Sivaraman, K. R (Indian Institute of Astrophysics, Bangalore, 1986)
    The role of the Ca II K line as a reliable diagnostic of the chromospheric activity on the Sun is reviewed. The chromospheric structures seen in this line serve as good indicators of the photospheric magnetic structures ...
  • Optical Aspects of Solar Activity 
    Bhatnagar, A (Indian Institute of Astrophysics, Bangalore, 1986)
    A review of optical observations of some solar phenomena is presented. From the photospheric observations of the birth, growth and decay of pores, spots and sunspot groups and associated velocity and magnetic field structure ...
  • Stone Inscriptions on Eclipses in Karnataka 
    Shylaja, B. S; Murthy, Chidananda. M (Indian Institute of Astrophysics, Bangalore, 1997)
    The solar and lunar eclipses have been documented on stone inscriptions in various parts of Karnataka, from the 9th century onwards. The records testify the knowledge of positional astronomy and also the cultural and ...
  • Effects of Solar Eclipse on Zooplanktomic Diel Periodicity and Primary Productivity in fresh water ponds 
    Mukhopadhyay, S. K; Biswas, S; Chatterjee, A (Indian Institute of Astrophysics, Bangalore, 1997)
    Solar eclipse was observed to initiate changes in primary productivity and diel periodicity in zooplanktonic surface crowding. Eclipse effect was more pronounced on loricate, illoricate rotifers and a copepoda Mesocyclops ...
  • Solar Eclipse and its effect on Epilepsy 
    Sheji, P (Indian Institute of Astrophysics, Bangalore, 1997)
    A study was conducted at the Indian Epilepsy foundation to investigate the possibility of seizure being precipitated by the solar eclipse viewed on October 24, 1995. 47 known epileptic parient were included under the ...
  • High Energy Photons detection using Scintillation Counter during Total Solar Eclipse of October 24, 1995 
    Jaaffrey, S. N. A; Jain, Rajmal; Pandya, Alok; Bharti, Lokesh (Indian Institute of Astrophysics, Bangalore, 1997)
    We report the first observations of absorption and enhancement in flux of high energy photons during thte total solar eclipse of October 24, 1995. For the purpose of these observations, we employed a scintillation counter ...
  • Microwave Propagation and Troposphere: Eclipse Time Observation 
    Mishra, U; Sen, S; Sharma, S; Barbara, A. K; Devi, M (Indian Institute of Astrophysics, Bangalore, 1997)
    The effect of 24th October 1995 solar eclipse were studied on the reception of Latikor-Shillong and Nongpiur-Shillong links both operating at a frequency of 11GHz. The surface temperature, pressure and humidity were ...
  • Field Strength Measurements A-3 Method (Oblique Incidence) at Ahmedabad during Total Solar Eclipse October 1995 
    Lele, P. D; Jani, K. G; Patel, A. P (Indian Institute of Astrophysics, Bangalore, 1997)
    A RACAL-17L communication receiver is used to record signal strength at Ahmedabad on 11.8 MHz transmitted from Colombo. In the initial stages of the eclipse and again towards the ending phase the signal strength showed ...
  • Multifrequency Vertical Incidence (A-1 Method) Absorption Measurements at Ahmedabad during Total Solar Eclipse October 1995 
    Lele, P. D; Jani, K. G; Patel, A. P (Indian Institute of Astrophysics, Bangalore, 1997)
    A vertical incidence multifrequency absorption experiment was conducted on 2.2, 2.5 and 2.8 MHz at Ahmedabad during TSE Oct. 24, 1995. From start of Eclipse a wave like structure starts and grows to maximum amplitude ...
  • Anomalous Behaviour of 22.3 kHz NWC Signal during Total Solar Eclipse of October 24, 1995 
    De, B. K; Sarkar, S. K (Indian Institute of Astrophysics, Bangalore, 1997)
    The effect of total solar eclipse of October 24, 1995 on long distance VLF radio wave propagation of 22.3 kHz from North West Cape, Australia to Calcutta is being reported here. After the commencement of the total eclipse ...
  • Preliminary Results of Ionosonde Measurements at Waltair (17.7 degree N) during the Total Solar Eclipse of October 24, 1995 
    Rama Rao, P. V. S; Prasad, DSVVD; Sri Ram, P; Jayachandran, P. T (Indian Institute of Astrophysics, Bangalore, 1997)
    The digital ionosonde system at Waltair was operated continuously from 23rd to 27th October 1995. The maximum percentage of obscuration (81%) of the solar disc occurred at 08.44 hrs IST as seen from Waltair on the eclipse ...
  • Effect of the Solar Eclipse of October 24, 1995 on the Ionospheric F-region over Kodaikanal 
    Karunakaran, D (Indian Institute of Astrophysics, Bangalore, 1997)
    HIgh time resolution soundings of the ionosphere over Kodaikanal were made with the IPS - 42 Digital Ionosonde on 24 October 1995 and on several days prior to and after that. The ionogram data were used to study the effect ...
  • Measurement of Water Vapour over Delhi during the Solar Eclipse - 1995 
    Bose, S; Lal, M; Ghosh, A. B (Indian Institute of Astrophysics, Bangalore, 1997)
    Ground-based IR spectroradiometer has been used for the measurements of water vapour over Delhi (28.7N, 77.2E, 220MSL) during October 24, 1995 solar eclipse. Water vapour variation has been measured during solar eclipse ...
  • 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 ...
  • Measured Higher IR Irradiance on Solar Eclipse day 
    Lal, M; Bose, S; Ghosh, A. B (Indian Institute of Astrophysics, Bangalore, 1997)
    Direct solar irradiance between 1200 and 1700 nm have been measured using ground-based IR spectroradiometer during October 24, 1995, solar eclipse over Delhi (28.7 degree N, 77.2 degree E, 220 MSL), India. The irradiance ...

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