Characterization of sites for Indian Large Optical Telescope Project

Parihar, Padmakar; Sharma, T. K.; Surendran, Avinash; Kemkar, P. M. M.; Dadul,; Stanzin, Urgian; Anupama, G. C.

doi:10.1088/1742-6596/595/1/012025

Cited by 3 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ground-layer seeing is found to be on the higher side during winter season (November-January). Astronomers who observe at HCT have consistently complained of poor atmospheric seeing in winter, and the atmospheric seeing values from DIMM (Parihar et al 2015) point to the same.…”

Section: Resultsmentioning

confidence: 84%

“…The median seeing at the IAO site at Hanle from DIMM measurements is found to be 1.27" (Parihar et al 2015), whereas the median atmospheric seeing measured by the lunar scintillometer for its highest pivot point altitude is 0.41" ( Table 1). The turbulence integral till the pivot point altitude closest to the boundary layer contributes to just 11% of the total value.…”

Section: Resultsmentioning

confidence: 96%

“…The Lunar Scintillometer is part of a multi-instrument campaign to ascertain the best site for building NLOT. Based on preliminary findings in the year 2007-08, Mount Saraswati at Hanle was chosen for a detailed site survey using multiple instruments (Parihar et al 2015).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Development of a Lunar Scintillometer as part of the national large optical telescope site survey

et al. 2018

View full text Add to dashboard Cite

Ground layer turbulence is a very important site characterization parameter used to assess the quality of an astronomical site. The Lunar Scintillometer is a simple and effective site-testing device for measuring the ground layer turbulence. It consists of a linear array of photodiodes which are sensitive to the slight variations in the moon's brightness due to scintillation by the lower layers of the Earth's atmosphere. The covariance of intensity values between the non-redundant photodiode baselines can be used to measure the turbulence profile from the ground up to a height determined by the furthest pair of detectors. The six channel lunar scintillometer that has been developed at the Indian Institute of Astrophysics is based closely on an instrument built by the team led by Andrei Tokovinin of Cerro Tololo Inter-American Observatory (CTIO), Chile (Tokovinin et al 2010). We have fabricated the instrument based on the existing electronic design, and have worked on the noise analysis, an EMI (Electromagnetic Induction) resistant PCB design and the software pipeline for analyzing the data from the same. The results from the instrument's multi-year campaign at Mount Saraswati, Hanle is also presented.

show abstract

Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 96%