High-accuracy differential image motion monitor measurements for the Thirty Meter Telescope site testing program

Details High-accuracy differential image motion monitor measurements for the Thirty Meter Telescope site testing program High-accuracy differential image motion monitor measurements for the Thirty Meter Telescope site testing program

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apopt..46.6460w&link_type=abstract

Applied Optics IP, vol. 46, Issue 25, pp.6460-6468

Physics

Optics

8

Active Or Adaptive Optics, Atmospheric Turbulence, Wave-Front Sensing

Scientific paper

Differential image motion monitors (DIMMs) have become the industry standard for astronomical site characterization. The calibration of DIMMs is generally considered to be routine, but we show that particular care must be paid to this issue if high-accuracy measurements are to be achieved. In a side by side comparison of several DIMMs, we demonstrate that with proper care we can achieve an agreement between the seeing measurements of two DIMMS operating under the same conditions to better than ±0.02 arc sec.

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