Results 1 to 10 of about 58 (41)
A generalized differential image motion monitor [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 We present the Generalised Differential Image Motion Monitor. It is a compact instrument dedicated to measure 4 parameters of the optical turbulence: seeing, isoplanatic angle, coherence time and wavefront coherence outer scale. GDIMM is based on a small telescope (28cm diameter) equipped with a 3-holes mask at its entrance pupil.
Eric Aristidi +2 more
exaly +4 more sources
A new generalized differential image motion monitor [PDF]
Proceedings of SPIE, 2014 We present first results of a new instrument, the Generalized Differential Image Motion Monitor (GDIMM), aiming at monitoring parameters of the optical turbulence (seeing, isoplanatic angle, coherence time and outer scale). GDIMM is based on a small telescope equipped with a 3-holes mask at its entrance pupil.
Julien Chabé, Eric Aristidi, Aziz Ziad
exaly +3 more sources
Multiwavelength Differential Image Motion Monitor
Optics Express, 2002 Astronomical seeing measurements are usually made at a single wavelength and extrapolated to other wavelengths of interest using scaling laws that assume a specific energy spectrum for the atmospheric turbulence. We describe a variation of the Differential Image Motion Monitor system that provides a measure of the seeing and evaluation of the scaling ...
Dale, Neimeier +4 more
exaly +3 more sources
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT In this work, we aim to calibrate an interferential seeing monitor (ISM), which is a testing instument used at astronomical sites. Its method is based on the study of the diffraction pattern produced by a Young’s double-slit at the focus plane of a telescope.
Zouhair Benkhaldoun
exaly +2 more sources
High-accuracy differential image motion monitor measurements for the Thirty Meter Telescope site testing program [PDF]
Applied Optics, 2007 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.
Tony Travouillon +2 more
exaly +4 more sources
Wave propagation effect on differential image motion monitor measurements
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT The differential image motion monitor (DIMM) is widely used to measure the atmospheric optical turbulence (OT) integral over the line of sight. However, it is known that because of the wave propagation effect, the DIMM’s sensitivity falls with the distance to the turbulent layer and the variance of differential image motion is ...
Victor Kornilov, Boris Safonov
exaly +2 more sources
A solar differential image motion monitor (T-SDIMM) for TUBITAK National Observatory of Turkey
Astronomische Nachrichten, 2003 Öz bulunamadı.
T Ak
exaly +3 more sources
Seeing measurements using the solar limb - I. Comparison of evaluation methods for the Differential Image Motion Monitor [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 Kiyoshi Ichimoto
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Turbulence monitoring at Calern observatory with the generalized differential image motion monitor [PDF]
Adaptive Optics Systems VII, 2020 SPIE Proceedings Volume 11448, Adaptive Optics Systems VII; 114484Z (2020) arXiv admin note: text overlap with arXiv:1904 ...
Aristidi, Eric +6 more
openaire +2 more sources
Astronomical Seeing at Maidanak Observatory during the Year 2018
Galaxies, 2021 Results of a four-month campaign of astronomical seeing measurements at Maidanak astronomical observatory (MAO) are presented. A differential image motion monitor (DIMM) was used for seeing estimations during the period from August to November 2018.
Yusufjon Tillayev +2 more
doaj +1 more source