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Daytime turbulence strength profile measurement at Kodaikanal Observatory

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dc.contributor.author Saraswathi Kalyani, S
dc.contributor.author Sridharan, R
dc.contributor.author Prasanna, Deshmukh
dc.contributor.author Nair, B. G
dc.contributor.author Mahesh Babu, S
dc.date.accessioned 2024-10-22T05:56:48Z
dc.date.available 2024-10-22T05:56:48Z
dc.date.issued 2024-07
dc.identifier.citation Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 10, No. 3, pp. 039004-1- 039004-16 en_US
dc.identifier.issn 2329-4124
dc.identifier.uri http://hdl.handle.net/2248/8547
dc.description Restricted Access en_US
dc.description.abstract The Indian Institute of Astrophysics is developing a Multi-Conjugate Adaptive Optics system for the Kodaikanal Tower Telescope. In this context, we measured the daytime turbulence strength profile at the Kodaikanal Observatory. The first method based on wavefront sensor images, called solar differential image motion monitor+, was used to estimate the higher altitude turbulence up to a height of 5 to 6 km. The second method used balloon-borne temperature sensors to measure the nearEarth turbulence up to 350 m. We also carried out simulations to validate the performance of our system. We report the first-ever daytime turbulence strength profile measurements at the observatory. We identified the presence of a strong turbulence layer ∼3 km above the observatory. The measured near-Earth turbulence matches the trend that is expected from the model for a daytime component of turbulence and gives an integrated r 0 of ∼4 cm at 500 nm. This is consistent with earlier seeing measurements. This shows that a low-cost setup with a small telescope and a simple array of temperature sensors can be used for estimating the turbulence strength profile at the site. en_US
dc.language.iso en en_US
dc.publisher SPIE - Society of Photo-Optical Instrumentation Engineers en_US
dc.relation.uri https://doi.org/10.1117/1.JATIS.10.3.039004
dc.rights © 2024 SPIE
dc.subject Daytime turbulence profiling en_US
dc.subject Site characterization en_US
dc.subject Adaptive optics en_US
dc.title Daytime turbulence strength profile measurement at Kodaikanal Observatory en_US
dc.type Article en_US


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