Browsing Integrated M.Tech-Ph.D (Tech.) by Title

Analytical modelling of Thirty Meter Telescope polarization

Ramya, M. Anche (Indian Institute of Astrophysics, 2014-08)

The polarization introduced due to TMT telescope optics is studied using an analytical model. Mueller matrices are also generated for each optical element using Zemax based on which the instrumental polarization due to ...

Beam-former for single beam, total power mode observations with Gauribidanur Radioheliograph

Mugundhan, V (Indian Institute of Astrophysics, 2014-08)

The Gauribidanur RadioheliograPH (GRAPH) in its present configuration is operated in the interferometer mode over the frequency range 30-100 MHz. It is proposed to design a beam-former unit for use with the GRAPH so that ...

Calibration of spectral channels for VELC onboard ADITYA-L1 and preparing data pipeline

Madhu, Vishnu (Indian Institute of Astrophysics, 2019-06)

ADITYA-L1 will be India’s first space mission dedicated to solar studies. The Visible Emission Line Coronagraph (VELC) is one of the prime payloads onboard ADITYA L1. VELC will perform simultaneous imaging, spectroscopy ...

Calibration of subsystems of visible emission line coronagraph

Pruthvi, Suryadevara (Indian Institute of Astrophysics, 2019-07)

Aditya-L1, India’s first mission with multiple science payloads is designed to study the solar dynamics. Aditya-L1 includes multiple payloads, the significant one being the Visible Emission Line Coronagraph (VELC). ...

Capacitive edge sensor and sensor electronics for segmented mirror telescopes

Sreekanth Reddy, V (Indian Institute of Astrophysics, 2014-08)

Edge sensors are high precision displacement sensors used in segmented mirror telescope to measure relative displacement between two mirror segments. An edge sensor based on parallel plate capacitor is being used in Keck ...

Characterization of a photon counting detector and Development of an attitude sensor for high altitude balloon experiments

Mathew, Joice (Indian Institute of Astrophysics, 2013-08)

The information contained in an optical image can be expressed as the spatial and temporal variation in number of photons at very low light level. The high gain Micro Channel Plate (MCP) image intensifier that constitutes ...

A Co-Phasing technique for segmented mirror telescopes

Jacob, A (Indian Institute of Astrophysics, 2014-08)

We are in an era where astronomy had taken steps to build giant telescope which have optics of size more than 10m, we can commonly call them ELTs or Extremely Large Telescopes. Due to various reasons like cost, ease of ...

Design and development of a digital micromirror device (DMD) based multi-object spectrograph (MOS) for the Indian spectroscopic and imaging space telescope (INSIST)

Jaini, Akhil (Indian Institute of Astrophysics, 2022-07)

The coming decade in astronomy focuses on large widefield imaging and spectroscopic surveys. No widefield imaging facility extends to the UV region, which represents an important window into a wide variety of astrophysical ...

Design and development of atmospheric dispersion corrector and fiber positioner for TMT-HROS

Manjunath, B (Indian Institute of Astrophysics, 2021-07)

Earth’s atmosphere is one of the significant factors affecting the quality of ground-based observations. For off-zenith observations with ground-based astronomical telescopes, the image size on the telescope's focal plane ...

Design and Development of DMD Controller Interface for INSIST

Jain, Shubhangi (Indian Institute of Astrophysics, 2022-07)

The INSIST (Indian Spectroscopic and Imaging Space Telescope) is a UV-optical 1m class telescope expected to produce high quality imaging and moderate resolution spectra of astronomical sources. A DMD is an optical ...

Design aspects of multi-slit spectropolarimeter for national large solar telescope

Khan, Raveena (Indian Institute of Astrophysics, 2020-07)

Magnetic field aids in coupling between different layers of the solar atmosphere. The magnetic field information simultaneously at multiple heights is important to understand many physical processes like flares, coronal ...

Design Aspects of Stokes Polarimeter for Solar Observations

Sajal Kumar Dhara (Indian Institute of Astrophysics, 2010-08)

Measurement of line polarization is an essential step towards remote sensing of the solar magnetic fields. The instrument used for measuring the polarization is known as polarimeter. Waveplate is one of the main parts ...

Design of a Broad Band Antenna System (40 to 500 MHz) for the Spectral Observations of Solar Corona

Kishore, P (Indian Institute of Astrophysics, 2011-07)

Design of a Circularly Polarized Antenna System for Low Frequency Radio Astronomical Observations

Hariharan, K (Indian Institute of Astrophysics, 2012-07)

The Indian Institute of Astrophysics operates three different radio telescopes at the Gauribidanur Radio Observatory. These instruments are: I) Radio Heliograph to obtain twodimensional images of the solar corona; ii) ...

Development of 6U spectrograph payload for NUV studies

Bharat Chandra, P (Indian Institute of Astrophysics, 2019-06)

One of the most exciting parts of the astrophysical spectrum is the near ultraviolet (NUV: 1800 – 3000Å), where there are a number of important atomic and molecular lines. The hot gas in the halo emits in NUV and also ...

Development of a lunar Scintillometer for measuring ground layer turbulence

Surendran, A (Indian Institute of Astrophysics, 2012-07)

Ground layer turbulence is one of the important site characterization parameters used for assessing the quality of an astronomical sites. Lunar Scintillometer (LuSci) is a simple, yet an effective site-testing device for ...

Development of an antenna system to observe the circularly polarized radio emission from the solar corona at low frequencies

Sasikumar Raja, K (Indian Institute of Astrophysics, 2010-07)

The corona is the outer most atmosphere of the Sun, overlying the photosphere and the chromosphere. It extends to several millions of kilometers into space and is about 106 times fainter compared to the photosphere. At ...

Development of an FPGA based photon counting detector

Ambily, S (Indian Institute of Astrophysics, 2014-08)

The UV photon event rate is very low in the near space region and we need to have a very sensitive detector to discriminate between the noise and actual signal. Photon counting method is usually used to detect such weak ...

Development of automated extinction monitor for the NLOT site survey

Tarun Kumar Sharma (Indian Institute of Astrophysics, 2011-07)

Development of cross-polarized log-periodic dipole antenna for low frequency radio spectral observations

Anshu Kumari (Indian Institute of Astrophysics, 2015-07)

The solar coronal mass ejections (CMEs) play a direct and vital role in deciding the space weather, so it becomes inevitable to study their dynamical properties in the lower corona (i.e., over the radial distance range: ...

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