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Table 1

Parameters and technical specifications of DF-DIMM.

Subaperture diameter φ60 mm
Subaperture separation 140 mm
Observed wavelength 472 nm
FWHM of the filter 35 nm
Pixel size 7.4 μm × 7.4 μm
Pixel scale 0.775′′/pix ± 0.005′′/pix
Exposure time 0.001 s
Number of frames used
  for each seeing estimate 450 over ~5 min
Height of the entrance pupils ~11 m

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