Combined MASS-DIMM instruments for atmospheric turbulence studies

Several site-testing programs and observatories currently use combined MASS-DIMM instruments for monitoring parameters of optical turbulence. The instrument is described here. After a short recall of the measured quantities and operational principles, the optics and elec- tronics of MASS-DIMM, interfacing to telescopes and detectors, and operation are covered in some detail. Particular attention is given to the correct measurement and control of instru- mental parameters to ensure valid and well-calibrated data, to the data quality and filtering. Examples of MASS-DIMM data are given, followed by the list of present and future applica- tions.

[1]  Chile,et al.  Atmospheric Scintillation at Dome C, Antarctica: Implications for Photometryand Astrometry , 2006, astro-ph/0604538.

[2]  Victor Kornilov,et al.  MASS: a monitor of the vertical turbulence distribution , 2003, SPIE Astronomical Telescopes + Instrumentation.

[3]  Michael C. B. Ashley,et al.  Exceptional astronomical seeing conditions above Dome C in Antarctica , 2004, Nature.

[4]  A. Tokovinin,et al.  Donut: Measuring Optical Aberrations from a Single Extrafocal Image , 2006, astro-ph/0606388.

[5]  Edison Bustos,et al.  High accuracy DIMM measurements for the TMT site testing program , 2006, SPIE Astronomical Telescopes + Instrumentation.

[6]  F. Roddier.  V The Effects of Atmospheric Turbulence in Optical Astronomy , 1981 .

[7]  T. Travouillon,et al.  Model of optical turbulence profile at Cerro Pachon , 2005 .

[8]  V. Kornilov,et al.  Restoration of turbulence profile from scintillation indices , 2003 .

[9]  Andrei Tokovinin,et al.  From Differential Image Motion to Seeing , 2002 .

[10]  R. A. Silverman,et al.  Wave Propagation in a Turbulent Medium , 1961 .

[11]  R Conan,et al.  From the grating scale monitor to the generalized seeing monitor. , 2000, Applied optics.

[12]  J. Vasquez,et al.  Statistics of turbulence profile at Cerro Tololo , 2003 .

[13]  Karen Ann Scott.  Wave propagation in a turbulent medium : second order effects. , 1977 .

[14]  R. Rosenfeld.  Nature , 2009, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.

[15]  J. Hardy,et al.  Adaptive Optics for Astronomical Telescopes , 1998 .

[16]  Andrei Tokovinin,et al.  Seeing Improvement with Ground‐Layer Adaptive Optics , 2004 .

[17]  B. Krauskopf,et al.  Proc of SPIE , 2003 .

[18]  Andrei Tokovinin,et al.  Measurement of seeing and the atmospheric time constant by differential scintillations. , 2002, Applied optics.

[19]  H. Lantéri,et al.  Single star scidar: atmospheric parameters profiling using the simulated annealing algorithm , 2006 .

[20]  M. Britton,et al.  The Anisoplanatic Point‐Spread Function in Adaptive Optics , 2006, astro-ph/0603170.

[21]  Brent Ellerbroek,et al.  Advances in Adaptive Optics II , 2006 .

[22]  Roberto Gilmozzi,et al.  Ground-based and Airborne Telescopes VII , 2008 .

[23]  Mark Chun,et al.  Optical Turbulence Profiles at Mauna Kea Measured by MASS and SCIDAR , 2005 .

[24]  N. M. Milton,et al.  Performance Modeling of a Wide‐Field Ground‐Layer Adaptive Optics System , 2006, astro-ph/0610097.

[25]  V. Kornilov,et al.  Accurate seeing measurements with MASS and DIMM , 2007, 0708.0195.