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

Development of a Lunar Scintillometer as part of the National Large Optical Telescope Site Survey