Development of solar scintillometer |
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Authors: | Sudhir Kumar Gupta Shibu K Mathew P Venkatakrishnan |
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Institution: | (1) Udaipur Solar Observatory, Badi Road, P. O. Box 198, 313 001 Udaipur, India |
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Abstract: | The index of scintillation measurement is a good parameter to compare different sites for image quality or ‘seeing’. We have
developed a scintillometer, which is deployed on the high resolution SPAR telescope in the island site of Udaipur Solar Observatory,
for the site characterization to specify the proposed MAST (Multi Application Solar Telescope). The scintillometer consists
of a miniature telescope, termed as micro telescope (4 mm aperture, 15 mm focal length) mounted on a drive which tracks the
Sun continuously, associated amplifiers and a data acquisition system. A photodiode is used as the detector. The telescope
along with detector was obtained from National Solar Observatory (NSO), and is similar to the one used for Advanced Technology
Solar Telescope (ATST) site survey. At USO we developed the amplifier and data acquisition system for the scintillometer.
A 24-bit analog to digital converter based system was designed, assembled, tested and used as the data acquisition system
(DAS). In this paper, we discuss the instrumentation and present the initial results. |
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Keywords: | Sun: scintillation scintillometer seeing |
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