MASS: a monitor of the vertical turbulence distribution

Kornilov, V.; Tokovinin, Andreï; Vozyakova, O. V.; Zaitsev, A.; Shatsky, N. I.; Potanin, Serguei F.; Sarazin, M.

doi:10.1117/12.457982

Cited by 115 publications

(75 citation statements)

References 8 publications

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“…Simultaneous MASS [12] results are also shown for comparison (bottom right panel in Fig. 10; no simultaneous MASS data are available for the other datasets).…”

Section: B Slodar Resultsmentioning

confidence: 99%

Atmospheric turbulence profiling with slodar using multiple adaptive optics wavefront sensors

2008

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The slope detection and ranging (SLODAR) method recovers atmospheric turbulence profiles from time averaged spatial cross correlations of wavefront slopes measured by Shack-Hartmann wavefront sensors. The Palomar multiple guide star unit (MGSU) was set up to test tomographic multiple guide star adaptive optics and provided an ideal test bed for SLODAR turbulence altitude profiling. We present the data reduction methods and SLODAR results from MGSU observations made in 2006. Wind profiling is also performed using delayed wavefront cross correlations along with SLODAR analysis. The wind profiling analysis is shown to improve the height resolution of the SLODAR method and in addition gives the wind velocities of the turbulent layers.

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“…Simultaneous MASS [12] results are also shown for comparison (bottom right panel in Fig. 10; no simultaneous MASS data are available for the other datasets).…”

Section: B Slodar Resultsmentioning

confidence: 99%

Atmospheric turbulence profiling with slodar using multiple adaptive optics wavefront sensors

2008

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“…The beam splitting between annular apertures is done by internal optics (Kornilov et al 2003). Scintillation, which depends on the altitude of the turbulence, is detected in each aperture using photomultipliers with 1 ms exposure time.…”

Section: The Mass (Multi Aperture Scintillation Sensor)mentioning

confidence: 99%

Multi-instrument measurement campaign at Paranal in 2007

Ali

Ziad

Berdja

et al. 2010

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Aims. Within the framework of site qualification for the future European large telescope E-ELT, a campaign of measurements was carried out for ten nights in December 2007 at Paranal using six independent instruments. Methods. To characterize the optical turbulence, two techniques were used: the statistical analysis of the fluctuations of the angle of arrival and the scintillation of the observed objects which are, in this case, a single star for DIMM, GSM, and MASS, a double star for Cute-SCIDAR, and Moon limb for MOSP and LuSci. Results. The optical parameters measured in this campaign and presented here are the seeing, the isoplanatic angle, the coherence time, and the outer scale. We obtain a good agreement with the value measured in previous campaigns. We also extracted the vertical profile of the turbulence given by C 2 n (h), and the profiles of the outer scale for the first time at Paranal. A comparison of the different results that we present here allows the determination of the energy distribution in the free atmosphere, on the ground layer as well as in the first meters above ground. This reveals a significant contribution of the surface layer to the degradation of the global seeing.

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“…Unlike most previously existing instruments, however, the division of the pupil into subapertures and the separation of the two star images of these subapertures are achieved not by a mask in the entrance pupil, but in a reimaged pupil plane behind the telescope optics using tilted mirrors. There, a second set of mirrors also separates the light of another part of the pupil and sends it to the photomultipliers of a multiaperture scintillation sensor (MASS) turbulence profiler [3]. Thus, MASS and DIMM are combined in a single instrument.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2007

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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 Ϯ0.02 arc sec.

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MASS: a monitor of the vertical turbulence distribution

Cited by 115 publications

References 8 publications

Atmospheric turbulence profiling with slodar using multiple adaptive optics wavefront sensors

Atmospheric turbulence profiling with slodar using multiple adaptive optics wavefront sensors

Multi-instrument measurement campaign at Paranal in 2007

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

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