Results 21 to 30 of about 28,409 (225)

Integration of measurements and model simulations to characterize Eyjafjallajökull volcanic aerosols over south-eastern Italy [PDF]

open access: yesAtmospheric Chemistry and Physics, 2012
Volcanic aerosols resulting from the Eyjafjallajökull eruption were detected in south-eastern Italy from 20 to 22 April 2010, at a distance of approximately 4000 km from the volcano, and have been characterized by lidar, sun/sky photometer, and surface ...
M. R. Perrone   +3 more
doaj   +1 more source

Evaluation of the MODIS C6 Aerosol Optical Depth Products over Chongqing, China

open access: yesAtmosphere, 2017
The Moderate Resolution Imaging Spectroradiometer (MODIS) Collection 6 (C6) aerosol optical depth (AOD) products from the 10/3 km Dark Target (DT) and Deep Blue (DB) algorithms are firstly evaluated using ground observed AODs by the sun photometer in ...
Guangming Shi   +3 more
doaj   +1 more source

Depolarization Ratio Retrievals Using AERONET Sun Photometer Data [PDF]

open access: yesJournal of the Optical Society of Korea, 2010
We present linear particle depolarization ratios (LPDRs) retrieved from measurements with an AERONET Sun photometer at the Gwangju Institute of Science and Technology (GIST), Korea (lTEXg$35.10^{/circ}N$l/TEXg, lTEXg$126.53^{\circ}E$l/TEXg) between 19 October and 3 November 2009.
Kyung-Hwa Lee   +4 more
openaire   +1 more source

Atmospheric Aerosol Outbreak over Nicosia, Cyprus, in April 2019: Case Study

open access: yesAtmosphere, 2022
This paper aims to analyze the significant changes in atmospheric aerosol characteristics during the extreme aerosol outbreak event in April 2019 in the atmosphere over Cyprus in the Eastern Mediterranean.
Yuliia Yukhymchuk   +8 more
doaj   +1 more source

Calculating direct normal irradiance from sun photometer measurements [PDF]

open access: yes, 2016
Abstract. An alternative method to modeling is proposed for determining direct normal irradiance from sun photometer measurements. Direct normal irradiance is calculated by integration of the sun photometer spectral irradiance measurements. Using pre and post calibration spectral coefficients and the extraterrestrial spectral irradiances at each filter
Juan Carlos Antuña Marrero   +5 more
openaire   +2 more sources

Instrument Performance in Kepler's First Months [PDF]

open access: yes, 2010
The Kepler Mission relies on precise differential photometry to detect the 80 parts per million (ppm) signal from an Earth-Sun equivalent transit. Such precision requires superb instrument stability on time scales up to ~2 days and systematic error ...
Argabright, Vic S.   +18 more
core   +1 more source

Description and applications of a mobile system performing on-road aerosol remote sensing and in situ measurements [PDF]

open access: yesAtmospheric Measurement Techniques, 2018
The majority of ground-based aerosols observations are limited to fixed locations, narrowing the knowledge on their spatial variability. In order to overcome this issue, a compact Mobile Aerosol Monitoring System (MAMS) was developed to explore the ...
I. E. Popovici   +16 more
doaj   +1 more source

Characterization of Extremely Fresh Biomass Burning Aerosol by Means of Lidar Observations

open access: yesRemote Sensing, 2022
In this paper, characterization of the optical and microphysical properties of extremely fresh biomass burning aerosol is presented. This work aims to characterize, for the first time to our knowledge, freshly formed smoke particles observed only a few ...
Benedetto De Rosa   +14 more
doaj   +1 more source

Automated Low-Cost LED-Based Sun Photometer for City Scale Distributed Measurements

open access: yesRemote Sensing, 2021
We propose a monochromatic low-cost automatic sun photometer (LoCo-ASP) to perform distributed aerosol optical depth (AOD) measurements at the city scale.
Cristobal Garrido   +3 more
doaj   +1 more source

Handheld Sun Photometer Measurements from Light Aircraft*

open access: yesJournal of Atmospheric and Oceanic Technology, 2007
Abstract Handheld sun photometers are typically used to make aerosol optical depth measurements while on the ground. Various investigators, in unrelated efforts, have used handheld sun photometers to make aerosol optical depth measurements from light aircraft, but the strengths and weakness of this approach have not been characterized ...
Antony Clarke   +6 more
openaire   +1 more source

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