Characterizing Optical Turbulence at the GMT Site with MooSci and MASS-DIMM

Details Characterizing Optical Turbulence at the GMT Site with MooSci and MASS-DIMM Characterizing Optical Turbulence at the GMT Site with MooSci and MASS-DIMM

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012pasp..124...84t&link_type=abstract

Publications of the Astronomical Society of the Pacific, Volume 124, issue 911, pp.84-93

Astronomy and Astrophysics

Astronomy

Astronomical Phenomena And Seeing

Scientific paper

In order to guide the adaptive optics design and aid in performance predictions, optical turbulence at the site of the future Giant Magellan Telescope (GMT) is characterized using MooSci, a lunar scintillometer, and MASS-DIMM, a combination differential image motion monitor and multiaperture scintillation sensor. As a new instrument, MooSci, is verified as a reliable ground-layer turbulence profiler. The GMT can expect an improvement of approximately 0.1″ over the site testing results as measured with a DIMM. Turbulence below 30 m is horizontally nonhomogeneous, dependent on wind speed and direction, and on average accounts for 60% of the full ground-layer (up to 500 m) turbulence.

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