IIA Institutional Repository

Technical Reports Series

Technical Reports Series

 

Recent Submissions

  • 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 ...
  • Fine image motion controler for Kodaikanal tunnel telescope 
    Thulasidharen, K. C; Prabhu, K; Rangarajan, K. E; Vasantharaju, N; Prabhu Ramkumar, B (Indian Institute of Astrophysics, 2013-05-06)
    Automation of the spectropolarimetric observations at Kodaikanal tunnel telescope needs placement of the Sun's image on the spectrograph slit and scanning it across the region of interest. This requirement can be achieved ...
  • 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 ...
  • The dome automation for the 75cm optical telescope VBO, Kavalur 
    Saleem, F; Ananth, A. V (Indian Institute of Astrophysics, 2013-04-15)
    This report describes the Interface hardware and the automation control program implemented for the 75cm telescope dome at VBO, Kavalur.
  • Development of a temperature controller for the order-sorting interference filters 
    Banyal, R. K; Ravindra, B (Indian Institute of Astrophysics, 2012-08-01)
    A Fabry-Perot narrow band imager (NBI) is being built for solar studies at IIA [1]. The NBI has an order sorting pre- lter that selects an optical beam within desired wavelength band. A constant temperature is required ...
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • The Control Scheme and the Software for the 75 cm Optical Telescope, VBO Kavalur 
    Ananth, A. V; Anbazhagan, P; Ravi, K; Arumugam, V; Ramachandiran, A; Venkateswara Rao, S (Indian Institute of Astrophysics, 2011)
    This report describes the Salient features of the control scheme and the control software for the recently upgraded 75 Cm. Telescope at VBO, Kavalur. The performance of the telescope in terms of controls is also highlighted.
  • 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 ...
  • Data acquisition electronics for Stellar Photo-Polarimeter 
    Srinivasulu, G (Indian Institute of Astrophysics, 2010)
    This report describes the concept of the electronics design and implementation of PMT pulse counting , rotation of Half wave plate, chopper spinning and shutter control and host computer communication.
  • Development of Solar Differential Image Motion Monitor at IIA, for the NLST site characterization program 
    Hasan, S. S; Saxena, A. K; Bagare, S. P; Samson, J. P. A; Ismail, M. M; Rajendra, B. S; Aditya, T; Jabilullah, R. I; Tsewang, D (Indian Institute of Astrophysics, 2010)
    The Indian Institute of Astrophysics is planning to setup a 2 m National Large Solar Telescope (NLST) in India. In view of this, a site survey program was initiated. A Solar Differential Image Motion Monitor (SDIMM) unit ...
  • A Dual Fabry-Perot based imaging Spectrometer for the National Large Solar Telescope 
    Ravindra, B; Banyal, R. K (Indian Institute of Astrophysics, 2010)
    This report provides a detailed design of a dual Fabry-Perot based narrow band imaging system intended to make observations of solar atmosphere at visible and near infrared wavelengths. The narrow band imager will serve ...