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Related papers: A dedicated tool for a full 3D Cn2 investigation

200 papers

Context: Current instrument developments at the largest telescopes worldwide have provisions for Multi-Conjugated Adaptive Optics (MCAO) modules. The large field of view and more uniform correction provided by these systems is not only…

Instrumentation and Methods for Astrophysics · Physics 2015-05-28 Eva Meyer , Martin Kuerster , Carmelo Arcidiacono , Roberto Ragazzoni , Hans-Walter Rix

ORCA (Oscillation Research with Cosmics in the Abyss) is the low-energy branch of KM3NeT, the next-generation research infrastructure hosting underwater Cherenkov detectors in the Mediterranean Sea. ORCA's primary goal is the determination…

Instrumentation and Detectors · Physics 2019-08-14 Jannik Hofestädt

Solar oxygen abundance measurements based on the O I near-infrared triplet have been a much-debated subject for several decades since non-local thermodynamic equilibrium (NLTE) calculations with 3D radiation-hydrodynamics model atmospheres…

Solar and Stellar Astrophysics · Physics 2023-04-12 A. G. M. Pietrow , R. Hoppe , M. Bergemann , F. Calvo

Knowledge of the optical refractive index structure parameter $C_n^2$ is of interest for Free Space Optics (FSO) and ground-based optical astronomy, as it depicts the strength of the expected scintillation on the received optical waves.…

Signal Processing · Electrical Eng. & Systems 2023-01-24 Florian Quatresooz , Danielle Vanhoenacker-Janvier , Claude Oestges

A high-density calorimeter, consisting of magnetized iron planes interleaved by RPCs, as tracking and timing devices, is a good candidate for a next generation experiment on atmospheric neutrinos. With 34 kt of mass and in four years of…

Space telescopes such as EChO (Exoplanet Characterisation Observatory) and JWST (James Webb Space Telescope) will be important for the future study of extrasolar planet atmospheres. Both of these missions are capable of performing high…

Earth and Planetary Astrophysics · Physics 2012-12-21 Joanna K. Barstow , Suzanne Aigrain , Patrick G. J. Irwin , Neil Bowles , Leigh N. Fletcher , Jae-Min Lee

We suggest a new web-based approach for browsing and visualizing data produced by a network of telescopes, such as those of the ongoing TAOS and the forthcoming TAOS II projects. We propose a modern client-side technology and we present two…

Instrumentation and Methods for Astrophysics · Physics 2014-08-28 D. Ricci , P. -G. Sprimont , C. Ayala , F. G. Ramón-Fox , R. Michel , S. Navarro , S. -Y. Wang , Z. -W. Zhang , M. J. Lehner , L. Nicastro , M. Reyes-Ruiz

The Extremely Large Telescope and the Thirty Meter Telescope will use state of the art multiconjugate adaptive optics (MCAO) systems to obtain the full D4 advantage that their apertures can provide. However, to reach the full astrometric…

In this contribution we evaluate the impact of filtering techniques in enhancing the accuracy of forecasts of optical turbulence and atmospheric parameters critical for ground-based telescopes. These techniques make use of the data…

Instrumentation and Methods for Astrophysics · Physics 2019-02-22 A. Turchi , G. Martelloni , E. Masciadri

We introduce the histogram of oriented gradients (HOG), a tool developed for machine vision that we propose as a new metric for the systematic characterization of observations of atomic and molecular gas and the study of molecular cloud…

Quaternary CaO-MgO-Al2O3-SiO2 glasses are important constituents of the Earth's lower crust and mantle, and they also have important industrial applications such as in metallurgical processes, concrete production and emerging low-CO2 cement…

Materials Science · Physics 2021-01-20 Kai Gong , V. Ongun Özçelik , Kengran Yang , Claire E. White

Having been operational at Kitt Peak for more than a year, the prototype of the Hungarian Automated Telescope (HAT-1) has been used for all-sky variability search of the northern hemisphere. The small autonomous observatory is recording…

Astrophysics · Physics 2009-12-10 Gaspar A. Bakos , Jozsef Lazar , Istvan Papp , Pal Sari , Elizabeth M. Green

Context. Tighter constraints on metal-poor stars we observe are needed to better understand the chemical processes of the early Universe. Computing a stellar spectrum in 3D allows one to model complex stellar behaviours, which cannot be…

Solar and Stellar Astrophysics · Physics 2017-02-22 A. J. Gallagher , E. Caffau , P. Bonifacio , H. -G. Ludwig , M. Steffen , D. Homeier , B. Plez

Adaptive optics (AO) is a technology in modern ground-based optical telescopes to compensate the wavefront distortions caused by atmospheric turbulence. One method that allows to retrieve information about the atmosphere from telescope data…

Instrumentation and Methods for Astrophysics · Physics 2018-04-04 Tapio Helin , Stefan Kindermann , Jonatan Lehtonen , Ronny Ramlau

The environmental hazards and climate change effects causes serious problems in land and coastal areas. A solution to this problem can be the periodic monitoring over critical areas, like coastal region with heavy industrial activity (i.e.,…

Databases · Computer Science 2024-05-14 Ioannis Kavouras , Ioannis Rallis , Nikolaos Doulamis , Anastasios Doulamis

Devices that detect angle-of-arrival (AoA) over a wide field of view are crucial for various applications such as wireless communication and navigation. They are often installed on platforms with challenging mechanical and stealth…

Signal Processing · Electrical Eng. & Systems 2025-07-08 Idban Alamzadeh , Michael Inman , Mohammadreza F. Imani

The characterization of multiple stellar systems is an important ingredient for testing current star formation models. Stars are more often found in multiple systems, the more massive they are. A complete knowledge of the multiplicity of…

Solar and Stellar Astrophysics · Physics 2015-06-12 Rebekka Grellmann , Thomas Preibisch , Thorsten Ratzka , Stefan Kraus , Krzysztof Helminiak , Hans Zinnecker

Global MCAO aims to exploit a very wide technical field of view to find AO-suitable NGSs, with the goal to increase the overall sky coverage. The concept foresees the use of numerical entities, called Virtual Deformable Mirrors, to deal…

Instrumentation and Methods for Astrophysics · Physics 2018-08-02 Valentina Viotto , Elisa Portaluri , Roberto Ragazzoni , Carmelo Arcidiacono , Maria Bergomi , Marco Dima , Jacopo Farinato , Davide Greggio , Demetrio Magrin

The amount of Adaptive Optics (AO) telemetry generated by VIS/NIR ground-based observatories is ever greater, leading to a growing need for a standardised data exchange format to support performance analysis and AO research and development…

Adaptive optics (AO) systems using tomographic estimation of three-dimensional structure of atmospheric turbulence requires vertical atmospheric turbulence profile, which describes turbulence strength as a function of altitude as a prior…

Instrumentation and Methods for Astrophysics · Physics 2021-04-21 Hajime Ogane , Masayuki Akiyama , Shin Oya , Yoshito Ono