2019/01/08 by Sreekanth Reddy, Reddy, Sreekanth, Ravinder K. Banyal +7 · 1 citation
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #FOS: Physical sciences #Infrared Target Detection Methodologies #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Satellite Image Processing and Photogrammetry
paper · pdf · doi:10.48550/arxiv.1901.02187
openalex publication_date 2019/01/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the atmospheric turbulence parameters namely, atmospheric seeing,\nthe tilt-anisoplanatic angle (\θ0) and the coherence time (\τ0),\nmeasured under various sky conditions, at Vainu Bappu Observatory in Kavalur.\nBursts of short exposure images of selected stars were recorded with a\nhigh-speed, frame-transfer CCD mounted on the Cassegrain focus of a newly\ncommissioned 1.3 m telescope. The estimated median seeing is \≈\n1.85\′\′ at wavelength of \∼ 600 nm, the image motion\ncorrelation between different pairs of stars is \∼ 44 % for \θ0\n\≈ 36\′\′ and mean \τ0 is \≈ 2.4 ms. This work was\nmotivated by the design considerations and expected the performance of an\nadaptive optics system that is currently being planned for the telescope.\n