Results 21 to 30 of about 1,120,334 (339)

Temporal Evolution and Regional Properties of Aerosol over the South China Sea

open access: yesRemote Sensing, 2023
Aerosol robotic network (AERONET) data from Dongsha Island (20.699N, 116.729E) and Taiping Island (35.90N, 3.03W) over the South China Sea (SCS) from January 2018 to December 2020 were used to analyze and discuss the temporal evolution properties of ...
Jie Chen   +8 more
doaj   +1 more source

Comparison of aerosol optical depth from satellite (MODIS), sun photometer and broadband pyrheliometer ground-based observations in Cuba [PDF]

open access: yesAtmospheric Measurement Techniques, 2018
In the present study, we report the first comparison between the aerosol optical depth (AOD) and Ångström exponent (AE) of the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments on the Terra (AODt) and Aqua (AODa) satellites and those ...
J. C. Antuña-Marrero   +8 more
doaj   +1 more source

Water Vapor Mixing Ratio Distribution Inversion by Raman Lidar in Beijing [PDF]

open access: yesEPJ Web of Conferences, 2020
Water Aerosol Raman Lidar-II is an active detection instrument with high temporal and spatial resolution at Nanjiao observation station, and that could continuous water vapor mixing ratio (WVMR) measurements.
Yu SiQi   +5 more
doaj   +1 more source

Atmospheric tomography with separate minimum variance laser and natural guide star mode control [PDF]

open access: yes, 2009
This paper introduces a novel, computationally efficient, and practical atmospheric tomography wavefront control architecture with separate minimum variance laser and natural guide star mode estimation.
Ellerbroek, B. L., Gilles, L.
core   +1 more source

Prediction of PM2.5 hourly concentrations in Beijing based on machine learning algorithm and ground-based LiDAR [PDF]

open access: yesArchives of Environmental Protection, 2021
The prediction of PM2.5 is important for environmental forecasting and air pollution control. In this study, four machine learning methods, ground-based LiDAR data and meteorological data were used to predict the ground-level PM2.5 concentrations in ...
Zhiyuan Fang   +5 more
doaj   +1 more source

Implications of Atmospheric Differential Refraction for Adaptive Optics Observations [PDF]

open access: yes, 2002
Many adaptive optics systems operate by measuring the distortion of the wavefront in one wavelength range and performing the scientific observations in a second, different wavelength range.
Roe, Henry G.
core   +2 more sources

Prediction of Aerosol Extinction Coefficient in Coastal Areas of South China Based on Attention-BiLSTM

open access: yesJournal of Marine Science and Engineering, 2022
The aerosol extinction coefficient (AEC) characterises the attenuation of the light propagating in a turbid medium with suspended particles. Therefore, it is of great significance to carry out AEC prediction research using state-of-art neural network (NN)
Zhou Ye   +6 more
doaj   +1 more source

The numerical simulation tool for the MAORY multiconjugate adaptive optics system [PDF]

open access: yes, 2016
The Multiconjugate Adaptive Optics RelaY (MAORY) is and Adaptive Optics module to be mounted on the ESO European-Extremely Large Telescope (E-ELT).
Agapito, Guido   +16 more
core   +2 more sources

Siberian lidar station: instruments and results

open access: yesEPJ Web of Conferences, 2018
The Siberian Lidar Station created at V.E. Zuev Institute of Atmospheric Optics and operating in Tomsk (56.5° N, 85.0° E) is a unique atmospheric observatory.
Matvienko Gennadii G.   +16 more
doaj   +1 more source

Study of a MEMS-based Shack-Hartmann wavefront sensor with adjustable pupil sampling for astronomical adaptive optics [PDF]

open access: yes, 2008
We introduce a Shack-Hartmann wavefront sensor for adaptive optics that enables dynamic control of the spatial sampling of an incoming wavefront using a segmented mirror microelectrical mechanical systems (MEMS) device.
Baranec, Christoph, Dekany, Richard
core   +1 more source

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