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High-performance computing simulations of self-gravity in astronomical agglomerates
SIMULATION, 2021This article describes the advances in the design, implementation, and evaluation of efficient algorithms for self-gravity simulations in astronomical agglomerates. Three algorithms are presented and evaluated: the occupied cells method, and two variations of the Barnes–Hut method using an octal and a binary tree.
Néstor Rocchetti +2 more
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Simulating Charge Deposition by Cosmic Rays Inside Astronomical Imaging Detectors
IEEE Transactions on Nuclear Science, 2020In the context of space astronomy missions, accurate and fast modeling of spurious images generated by solar and galactic cosmic rays (GCRs) in imaging detectors is critical in order to assess and mitigate their detrimental effects. Currently, it is only possible to accurately reproduce the CR images including energy loss straggling, with the use of ...
David Lucsanyi, Thibaut Prod'homme
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Simulation of Large-Scale Astronomical CCD Surveys
1989We present the first stage of a project to develop a computer model of a CCD camera system dedicated to galaxy surveys. We plan to improve old and develop new algorithms for reduction and analysis of digital astronomical images. We intend to apply our model to testing theories and observations of the large-scale distribution of galaxies, and data ...
Emilio E. Falco, Michael J. Kurtz
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Large-Scale Multithreading Self-Gravity Simulations for Astronomical Agglomerates
2019 Winter Simulation Conference (WSC), 2019This article presents parallel multithreading self-gravity simulations for astronomical agglomerates, applying High Performance Computing techniques to allow the efficient simulation of systems with a large number of particles. Considering the time scales needed to properly simulate the processes involved in the problem, two parallel mesh-based ...
Sergio Nesmachnow +2 more
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CAOS: a numerical simulation tool for astronomical adaptive optics (and beyond)
SPIE Proceedings, 2004We present recent developments of the CAOS "system", an IDL-based Problem Solving Environment (PSE) whose original aim was to define and simulate as realistically as possible the behavior of a generic adaptive optics (AO) system, from the atmospheric propagation of light, to the sensing of the wave-front aberratoins and the correction through a ...
M. CARBILLET +12 more
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Data modeling for analytical astronomical simulation VV and A
SPIE Proceedings, 2006This paper presents a novel analytical method for comparing simulation data with measured flight data to with the goal of proving Equivalence and Consistency between the model and the real data. Our method overcomes the problems of disparity in the inputs to the simulation and varying number of parameters between the simulation and the measured flight ...
James W. Handley +3 more
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Application of simulated annealing to deconvolution in astronomical speckle imaging
Optics Communications, 1991Abstract Monte-Carlo type simulated annealing has been investigated as an optimization procedure for reconstructing high spatial resolution astronomical images. In particular, the annealing method is shown to be a powerful technique for phase retrieval in connection with Knox-Thompson speckle correlation data.
E.J. Spillar, G.R. Ayers
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Astronomical solar radiation simulation based on DEM in Wuyishan mountainous areas
SPIE Proceedings, 2008Digital Elevation Models (DEM) data (90mx90m) reflected by the NASA Shuttle Radar Topography Mission (SRTM) are used as basic information source to overlay digital slope models and digital aspect models, which are applicable to the mountainous terrain of astronomical solar radiation distributed model.
Shaogang Wang +3 more
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Computer simulations of imaging astronomical objects through Kolmogorov turbulence
2017 2nd International Conference on Image, Vision and Computing (ICIVC), 2017Two-dimensional mathematical modeling and simulations are carried out to observe a reference and a binary star in the absence and presence of a Kolmogorov turbulence via ground-based optical telescopes. This involve the quantitative assessment of the modulation transfer function (MTF) of a reference star, the Fourier magnitude (FM) and the ...
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A versatile turbulence simulator for high-resolution imaging studies of astronomical targets
Adaptive Optics Systems VII, 2020We describe versatile turbulence simulator for testing and calibration of new techniques for high-resolution imaging of objects outside the Earth’s atmosphere using ground-based instrumentation. Examples here include: dynamic aperture diversity, wave front sensing using multi-aperture phase retrieval, and free-space beam propagation for rapidly re ...
Caleb Abbott +4 more
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