27 July 2016 Atmospheric seeing measurement from bright star trails with frame transfer CCDs
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We present a new application of frame transfer Charge-Coupled Device (CCD) on measuring astronomical seeing. If a telescope is equipped with a shutterless, frame transfer CCD camera, a bright star will generate a trail during the frame transfer phase. Because the transfer is very fast, the trail is a series of short exposures (about 1 ms) of the target star. Therefore the centroid is jittery due to atmospheric turbulence, and the amplitude can be utilized to derive astronomical seeing. We present the preliminary results from STA1600FT CCD on the second Antarctic Survey Telescope (AST3) tested in China. The trail seeing moderately agrees with the simultaneous DIMM seeing.
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Bin Ma, Bin Ma, Zhaohui Shang, Zhaohui Shang, Yi Hu, Yi Hu, Keliang Hu, Keliang Hu, Chong Pei, Chong Pei, Xiangyan Yuan, Xiangyan Yuan, "Atmospheric seeing measurement from bright star trails with frame transfer CCDs", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99060A (27 July 2016); doi: 10.1117/12.2231928; https://doi.org/10.1117/12.2231928

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