IIA Institutional Repository

Browsing Technical Reports Series by Issue Date

Browsing Technical Reports Series by Issue Date

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  • 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 ...
  • 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 ...
  • 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 ...
  • 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.
  • 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 ...
  • 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.
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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.
  • 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 ...
  • 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 ...
  • Raveendran, A. V; Srinivasulu, G; Muneer, S; Mekkaden, M. V; Jayavel, N; Somashekar, M. R; Sagayanathan, K; Ramamoorthy, S; Rosario, M. J; Jayakumar, K (Indian Institute of Astrophysics, 2015)
    A new astronomical photo-polarimeter that can measure linear polarization of point sources simultaneously in three spectral bands was designed and built in the Institute. The polarimeter has a Calcite beam-displacement ...
  • Parwage, Anish (Indian Institute of Astrophysics, 2015)
    TORQUE-3.0.2 with Maui-3.3.1 is used as Resource Manager for HYDRA and performs job scheduling in cluster environment. It looks into the resource requirement for a job and provides the requested resources for the job to ...
  • 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 ...
  • Anand, M. N (Indian Institute of Astrophysics, 2024-05-29)
    We perceive time as a passage of events, a marker of change. In astronomy and astrophysics, we study events occurring over a short time (order of seconds) to long-term (a few years) variability. Accurate time stamping is ...
  • Arumugam, V (Indian Institute of Astrophysics, 2024-05-29)
    A Telescope is an instrument that aids in the observation of stellar and celestial objects. Mirrors are an important subsystem in the Telescope. Over a period, due to weathering effects, reflection efficiency of the mirrors ...

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