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Browsing Technical Reports Series by Title

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  • Important guidelines and safety precaution for battery management in UPS and other applications 
    Chinnappan, V (Indian Institute of Astrophysics, 2011)
    Computers and communication equipments need uninterrupted quality power for proper functioning. Electrical power is the most essential item for Industries and Institutions. The electricity consumer never worries about the ...
  • Improving the image quality at the calcium K and hydrozen spectroheliographs at the Kodaikanal Observatory 
    Singh, J; Aleem, P. S. M; Nagabhushana, B. S (Indian Institute of Astrophysics, 1988-01)
  • Measurements of Gondola Motion on a Stratospheric Balloon Flight 
    Safonova, M; Nirmal, K; Sreejith, A.G.; Satpodar, Mayuresh; Suresh, Ambily; Prakash, A; Mathew, Joice; Murthy, J; Anand, D; Karpardhi, B.V.N.; Suneel Kumar, B; Kulkarni, P.M. (Indian Institute of Astrophysics, 2016)
    Balloon experiments are an economically feasible method of conducting observations in astron- omy that are not possible from the ground. The astronomical payload may include a telescope, a detector, and a pointing/stabilization ...
  • Re-aluminization of 2M Himalayan Chandra Telescope primary mirror 
    Kemkar, P. M. M; Saxena, A. K; Nirmal Kumar, P. K; Ismail, R; Sagayanathan, K (Indian Institute of Astrophysics, 2011-12)
    The purpose of this document is to establish the general requirements for handling and coating of the primary and secondary mirror of 2M Himalayan Chandra Telescope (HCT) at the observatory Mirror Coating facility, Hanle. ...
  • Rotational shearing interferomater 
    Yeswanth, L (Indian Institute of Astrophysics, 2013-05-03)
    A rotational shearing interferometer is a modification of the Michelson’s interferometer to obtain the spatial coherence of the light waves. It is mainly used for obtaining diffraction limited images of astronomical ...
  • 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 Powered Dome Shutter Control 
    Ravi, K; Anbazhagan, P; Ramachandiran, A; Venkateswara Rao, S (Indian Institute of Astrophysics, 2011)
    Conventional Telescope Dome Shutter Control has bi-parting shutter driven by a AC three phase induction motor to which AC power is fed through circumferential busbars. These busbars frequently requires maintenance and some ...
  • Solid state coelostat drive system for a telescope 
    Srinivasan, R; Singh, J; Ramamoorthy, K. S (Indian Institute of Astrophysics, 1989-07)
  • WARM Telescope control system (white light active region monitor Coelostat – KODAIKANAL) 
    Thulasidharen K. C (Indian Institute of Astrophysics, 2010)
    A three axis control system for WARM telescope is developed. A four axis motion controller next move PCI from Balder Electric Company is used for controlling the three axes. The control code is developed in MINT V5 Software ...

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