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Výsledek výzkumu

Application of K-Nearest Neighbor Classification for Static Webcams Visibility Observation

Visibility observations and accurate forecasts are essential in meteorology, landmark identification, and visibility estimation, mirroring the observation process of professional meteorological observers. This stud...

Meteorology and atmospheric sciences

  • 2023
  • Jimp
  • Odkaz
Výsledek výzkumu

Experimental Investigation of the Effects of Fog on Optical Camera-based VLC for a Vehicular Environment

of meteorological visibilities between 5-120 m is considered based on realistic inter-vehicle. The results show that, the link is error-free up to 20 m meteorological visibility for the three modulation index scen...

Electrical and electronic engineering

  • 2019
  • D
  • Odkaz
Výsledek výzkumu

Estimation of Free Space Optics Systems Availability Based on Meteorological Visibility

distance, wavelength and meteorological visibility. The paper deals with the estimation of FSO availability based on statistical evaluation of visibility data collected......

JA - Elektronika a optoelektronika, elektrotechnika

  • 2009
  • D
Výsledek výzkumu

Free Space Optical Link Range Determination on the Basis of Meteorological Visibility

This work is focused on the free space optical links and the laser beam transmission via atmospheric transmission media. Meteorological visibility is presented in the work as well as Kim and Kruse models for determination of atmosph...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2009
  • D
Výsledek výzkumu

Estimation of Free Space Optics Systems Availability Based on Meteorological Visibility

In the paper a simple method of the availability estimation of commercially produced FSOs based on polynomial approximation of cumulative distribution functions of selected visibility records was created. These approximations calculated by u...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2009
  • D
Výsledek výzkumu

Planetary Boundari Layer Effect on Vertical Transport of Black Carbon Concentration under Different Meteorological Conditions

In the present study, we analyzed the impact of equivalent black carbon (eBC) aerosols at two different heights (4 m and 230 m) on the PBL height under different nmetrological conditions such as clear sky, foggy (visibility ≤ 1km), and hazy ...

Meteorology and atmospheric sciences

  • 2022
  • D
  • Odkaz
Výsledek výzkumu

Aerosol pollution in relation to optical phenomena in the atmosphere and meteorological phenomena decreasing atmospheric visibility

Description of the atmospheric optical phenomena in relation to aerosol pollution, relations between aerosol polution and decrease of visibility....

DG - Vědy o atmosféře, meteorologie

  • 2010
  • Jx
Výsledek výzkumu

Impact of atmosphere on attenuation of free space optical links - Long term results from Milesovka observatory

The Institute of Atmospheric Physics Prague of the Czech Academy of Sciences operates an experimental dual-wavelength free space optical (FSO) link at the meteorological observatory Milesovka being 70 km north to Prague (837 m.a.s.l.). Relev...

JB - Senzory, čidla, měření a regulace

  • 2015
  • D
  • Odkaz
Výsledek výzkumu

Availability of Free Space Optics Systems in Dependence on Weather Conditions and Link Parameters

, wavelength and meteorological visibility. The atmospheric attenuation and consequently FSO availability were calculated by using actual visibility data collected......

JA - Elektronika a optoelektronika, elektrotechnika

  • 2007
  • D
Výsledek výzkumu

CALCULATED AND MEASURED VALUES OF LIQUID WATER CONTENT IN CLEAN AND POLLUTED ENVIRONMENTS

The relationship between liquid water content (LWC) and visibility (VIS) in a fog was examined by a field measurement of LWC values at a clean location of the meteorological observatory Sodankylä (Finland) and in a polluted region a...

DG - Vědy o atmosféře, meteorologie

  • 2006
  • Jx
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