A5009475289- Impact of Light on Environment and Health
- Atmospheric aerosols and clouds
- Urban Heat Island Mitigation
- Atmospheric Ozone and Climate
- Astro and Planetary Science
- Atmospheric chemistry and aerosols
- Solar and Space Plasma Dynamics
- Building Energy and Comfort Optimization
- Remote Sensing in Agriculture
- Planetary Science and Exploration
- Astrophysics and Star Formation Studies
- Air Quality and Health Impacts
- Solar Radiation and Photovoltaics
- Circadian rhythm and melatonin
- Calibration and Measurement Techniques
- Optical Wireless Communication Technologies
- Radiative Heat Transfer Studies
- Thermal Radiation and Cooling Technologies
- Stellar, planetary, and galactic studies
- Plasmonic and Surface Plasmon Research
- Surface Roughness and Optical Measurements
- Near-Field Optical Microscopy
- Color Science and Applications
- Optical Polarization and Ellipsometry
- Infrared Target Detection Methodologies
Comenius University Bratislava
2016-2025
Slovak Academy of Sciences
2016-2025
Institute of Construction and Architecture of the Slovak Academy of Sciences
1993-2023
Pacific Northwest National Laboratory
2017
Astronomical Institute of the Slovak Academy of Sciences
2005-2014
Slovak University of Technology in Bratislava
2007
University of Vienna
2004-2006
Artificial light at night can be harmful to the environment, and interferes with fauna flora, star visibility, human health. To estimate relative impact of a lighting device, its radiant power, angular photometry detailed spectral power distribution have considered. In this paper we focus on distribution. While specific characteristics considered during night, they advantageous day. As an example, while blue-rich Metal Halide lamps problematic for health, visibility vegetation photosynthesis...
The Sky Quality Meter (SQM) has become the most common device to track evolution of brightness sky from polluted regions first class astronomical observatories. A vast database SQM measurements already exists for many places in world. Unfortunately, operates over a wide spectral band and its response interacts with sky's spectrum complex manner. This is why optical signals are difficult interpret when data recorded different sources artificial light. night linked way ground-based light...
The scalable theoretical model of light pollution for ground sources is presented. successfully employed simulation angular behavior the spectral and integral sky radiance and/or luminance during nighttime. There no restriction on number ground-based or spatial distribution these in vicinity measuring point (i.e., both distances azimuth angles are configurable). applicable real finite-dimensional surface with defined radiating properties contrary to frequently used point-source...
ABSTRACT The population of artificial satellites and space debris orbiting the Earth imposes non-negligible constraints on both operations ground-based optical radio astronomy. ongoing deployment several satellite ‘mega-constellations’ in 2020s represents an additional threat that raises significant concerns. expected severity its unwanted consequences is still under study, including interference information loss by streaks appearing science images. In this Letter, we report a new skyglow...
Astronomical observations are increasingly limited by light pollution, which is a product of the over-illumination night sky. To predict both angular distribution scattered and ground-reaching radiative fluxes, set models has been introduced in recent decades. Two distinct numerical tools, MSNsRAu ILLUMINA, compared this paper, with aim identifying their strengths weaknesses. The experiment comprises simulation spectral radiances region Canary Islands. In particular, fields near Roque de los...
There has been growing observational evidence for the presence of condensates in atmospheres and/or comet-like tails extrasolar planets. As a result, systematic and homogeneous tables dust properties are useful order to facilitate further theoretical studies. In this paper we present calculations analysis non-isotropic phase functions, asymmetry parameter (mean cosine scattering angle), absorption opacities, single albedos, equilibrium temperatures, radiative accelerations grains relevant...
Scattering of electromagnetic radiation by a charged homogeneous spherical particle/body is treated. Theoretical solution represents generalization the Mie's scattering theory for electrically neutral sphere. It shown that classical and quantum physics approaches may lead to difierent conclusions, as documented numerical computations assuming various permeabilities, refractive indices, surface charges, temperatures, other physical parameters particles. Two discrete wavelengths (5m 1mm)...
The mechanism in which multiple scattering influences the radiance of a night sky has been poorly quantified until recently, or even completely unknown from theoretical point view. In this paper, relative contribution higher-scattering radiances to total is treated analytically for all orders scattering, showing that fast and accurate numerical solution problem exists. Unlike class ray tracing codes CPU requirements increase tremendously with each new mode, developed here requires same...
Significance Anthropogenic skyglow is currently a serious threat to natural environments near human settlements; however, spread of light over wide areas difficult predict due uncertainties in the city emission function (CEF) from many sources. The CEF determines rate at which varies with distance source but remains virtually unexplored because appropriate retrieval tools have been unavailable. However, we now obtained ground-based night-sky radiometry and conducted successful experiment...
Abstract Light pollution is a novel environmental problem whose extent and severity are rapidly increasing. Among other concerns, it threatens global biodiversity, nocturnal animal migration, the integrity of ground-based astronomy research enterprise. The most familiar manifestation light skyglow, result interplay outdoor artificial at night (ALAN) atmospheric scattering that obscures views naturally dark skies. Interventions to reduce sky brightness (NSB) involving adoption modern lighting...
Abstract The spatial and angular emission patterns of artificial natural light emitted, scattered, reflected from the Earth at night are far more complex than those for scattered solar radiation during daytime. In this commentary, we use examples to show that there is additional information contained in distribution emitted light. We argue could be used improve existing remote sensing retrievals based on lights, some cases make entirely new analyses possible. This work will challenging, so...
This Letter treats the scattering of electromagnetic waves by an electrically charged spherical particle in near-field approximation. Particular attention is paid to external intensity distribution at outer edges particle. The difference between a sphere and neutral significant only when size parameters exceed unity.
In general terms, lighting research has been focused in the development of artificial light with purpose saving energy and having more durable lamps. However, consequences that night could bring to human being living organisms have become an important issue recently. Light pollution represents a significant problem both environment health causing disruption biological rhythms related not only visible spectrum, but also other parts electromagnetic spectrum. Since lamps emit across wide range...
Measurements of artificial light at night represent an incredible challenge as the optical state atmosphere is highly unstable thus making both long-term trend analyses and inter-comparison multiple observations difficult. Variations atmospheric parameters, caused by either natural or anthropogenic processes, can massively influence level resulting sky brightness pollution. Focusing on six from aerosol optics emission properties sources, this work literarily numerically examines defined...