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Determination of the energy and flux of the gamma photons by Imaging Atmospheric Cherenkov Technique is strongly dependent on optical properties of the atmosphere. Therefore, atmospheric monitoring during the future observations of the…

High Energy Astrophysical Phenomena · Physics 2018-01-22 Jakub Juryšek , Michael Prouza

This paper considers environmental problems of natural and anthropogenic atmospheric aerosol pollution and its global and regional monitoring. Efficient aerosol investigations may be achieved by spectropolarimetric measurements.…

Atmospheric and Oceanic Physics · Physics 2015-10-30 Zh. I Patlashenko

MICADO, a near-infrared imager for the Extremely Large Telescope, is being designed to deliver diffraction limited imaging and 50 micro arcsecond (${\mu}$as) astrometric accuracy. MICADO employs an atmospheric dispersion corrector (ADC) to…

Instrumentation and Methods for Astrophysics · Physics 2020-07-08 J. A. van den Born , W. Jellema

We measure the resonance line shape of atomic vapor layers with nanoscale thickness confined between two sapphire windows. The measurement is performed by scanning a probe laser through resonance and collecting the scattered light. The line…

Atomic Physics · Physics 2015-11-18 K. A. Whittaker , J. Keaveney , I. G. Hughes , A. Sargsyan , D. Sarkisyan , C. S. Adams

Autonomous vehicles rely on a variety of sensors to gather information about their surrounding. The vehicle's behavior is planned based on the environment perception, making its reliability crucial for safety reasons. The active LiDAR…

Robotics · Computer Science 2023-06-07 Mariella Dreissig , Dominik Scheuble , Florian Piewak , Joschka Boedecker

Theoretical atmosphere models provide the basis for a variety of applications in astronomy. In simplified one-dimensional (1D) atmosphere models, convection is usually treated with the mixing length theory despite its well-known…

Solar and Stellar Astrophysics · Physics 2015-06-17 Zazralt Magic , Remo Collet , Martin Asplund

Atmospheric turbidity is one of the key factors influencing the propagation of artificial light into the environment during cloudless nights. High aerosol loading can reduce the visibility of astronomical objects, and thus information on…

Instrumentation and Methods for Astrophysics · Physics 2023-06-13 Miroslav Kocifaj , František Kundracik , John Barentine

Calibration of a PMT matrix is crucial for the treatment of the data obtained with Cherenkov tracking detector. Furthermore, due to high variability of the aerosol abundance in the atmosphere depending on season, weather etc. A constant…

Instrumentation and Methods for Astrophysics · Physics 2015-09-02 Stanislav Knurenko , Yuri Egorov , Igor Petrov

Lidar-based object detectors are critical parts of the 3D perception pipeline in autonomous navigation systems such as self-driving cars. However, they are known to be sensitive to adverse weather conditions such as rain, snow and fog due…

Computer Vision and Pattern Recognition · Computer Science 2021-07-16 Velat Kilic , Deepti Hegde , Vishwanath Sindagi , A. Brinton Cooper , Mark A. Foster , Vishal M. Patel

Differential atmospheric dispersion is a wavelength-dependent effect introduced by the atmosphere. It is one of the instrumental errors that can affect the position of the target as perceived on the sky and its flux distribution. This…

Instrumentation and Methods for Astrophysics · Physics 2020-01-08 Bachar Wehbe , Alexandre Cabral , Jorge Martins , Pedro Figueira , Nuno Santos , Gerardo Ávila

We set out to evaluate the potential of the Colombian Andes for millimeter-wave astronomical observations. Previous studies for astronomical site testing in this region have suggested that nighttime humidity and cloud cover conditions make…

Instrumentation and Methods for Astrophysics · Physics 2017-09-18 Germán Chaparro Molano , Oscar Leonardo Ramírez Suárez , Oscar Restrepo , Alexander Martínez

In this contribution, we present the StaggerGrid, a collaborative project for the construction of a comprehensive grid of time-dependent, three-dimensional (3D), hydrodynamic model atmospheres of solar- and late-type stars with different…

Solar and Stellar Astrophysics · Physics 2015-05-30 Remo Collet , Zazralt Magic , Martin Asplund

Point sources in the atmosphere are surrounded by aureole because of atmospheric scattering. The properties of the time-dependent aureole radiance are calculated by use of a Monte Carlo approach and an iterative method. Since the aureole is…

Astrophysics · Physics 2007-05-23 Xingzhi Zhang

The interaction of aerosol-cloud-precipitation has an important impact on the global climate. The understanding of this issue is related to the uncertainty of climate change prediction. The traditional indirect effect of aerosols suggests…

Atmospheric and Oceanic Physics · Physics 2019-02-05 Chongxing Fan , Maiqi Ding , Peipei Wu , Yaqi Fan

A high resolution 2 m$^2$ tracking detector, based on timing Resistive Plate Chamber (tRPC) cells, has been installed at the Faculty of Physics of the University of Santiago de Compostela (Spain) in order to improve our understanding of the…

Instrumentation and Methods for Astrophysics · Physics 2020-07-14 Irma Riádigos , Damián García-Castro , Diego González-Díaz , Vicente Pérez-Muñuzuri

Calculations of atmospheric refraction are generally based on a simplified model of atmospheric density in the troposphere which assumes that the temperature decreases at a constant lapse rate from sea level up to a height equal to eleven…

Atmospheric and Oceanic Physics · Physics 2016-09-29 Michael Nauenberg

The tropopause is the boundary between the troposphere and the stratosphere, so its height determines the nature of processes in the atmosphere and depends on them. The criterion for determining the height of the tropopause is a decrease in…

Atmospheric and Oceanic Physics · Physics 2022-05-31 Alexander Kochin

Atmospheric interaction with light has been an area of fascination for many researchers over the last century. Environmental conditions, such as temperature and wind speed, heavily influence the complex and rapidly varying optical…

The wavelength dependent refraction of light in the atmosphere causes the chromatic dispersion of a target on the focal plane of an instrument. This is known as atmospheric dispersion, with one of the consequences being wavelength dependent…

Instrumentation and Methods for Astrophysics · Physics 2024-07-22 J. Stephan , R. Sánchez-Janssen

In this paper, we developed the solution of roadside LiDAR object detection using a combination of two unsupervised learning algorithms. The 3D point clouds are firstly converted into spherical coordinates and filled into the…

Computer Vision and Pattern Recognition · Computer Science 2022-06-14 Tianya Zhang , Peter J. Jin
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