Twilight observations with MASS-DIMM

Details Twilight observations with MASS-DIMM Twilight observations with MASS-DIMM

2011-01-12

arxiv.org/abs/1101.2351v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

Contribution in conference "Comprehensive characterization of astronomical sites", held October 4-10, 2010, in Kislovodsk, Rus

Scientific paper

In this paper we describe the method of measurement of optical turbulence in twilight with MASS-DIMM. Some results of such observations carried out with SAI ASM installed on Mt. Shatdzatmaz: 1) characteristics of optical turbulence don't change significantly in transition between day and night 2) twilight measurements of seeing can be used for selection of observational program for big telescope on condition that program switching is long - longer than 30-40 minutes. In conclusions we list upgrades of ASM system needed to improve capabilities to observe on twilight.

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