Results 31 to 40 of about 1,120,334 (339)

Analysis of Non-linear Relationship of PM2.5 Mass Concentration with Aerosol Extinction Coefficient and RH in Hefei, China

Aerosol and Air Quality Research, 2023
Optical remote sensing of PM2.5 concentration complements ground-based in situ sampler observations and depends on aerosol extinction-to-mass conversion and meteorological factors.
Yinan Chen, Shiguo Zhang, Yonghua Wu, Kee Yuan, Jian Huang, Dongfeng Shi, Shunxing Hu   +6 more
doaj   +1 more source

Characteristics of Aerosol Extinction Hygroscopic Growth in the Typical Coastal City of Qingdao, China

Remote Sensing, 2022
The aerosol hygroscopic growth (HG) characteristics in coastal areas are very complex, which is one of the main influences on the simulation accuracy of radiation transfer modeling for coastal environments.
Nana Liu, Shengcheng Cui, Tao Luo, Shunping Chen, Kaixuan Yang, Xuebin Ma, Gang Sun, Xuebin Li   +7 more
doaj   +1 more source

Wavefront sensing of atmospheric phase distortions at the Palomar 200-in. telescope and implications for adaptive optics [PDF]

, 1997
Major efforts in astronomical instrumentation are now being made to apply the techniques of adaptive optics to the correction of phase distortions induced by the turbulent atmosphere and by quasi-static aberrations in telescopes themselves.
Bloemhof, E. E., Ewald, S. P., Westphal, J. A.   +2 more
core   +1 more source

Retrieval of aerosol properties from zenith sky radiance measurements [PDF]

Atmospheric Measurement Techniques, 2023
This study explores the potential to retrieve aerosol properties with the GRASP algorithm (Generalized Retrieval of Atmosphere and Surface Properties) using as input measurements of zenith sky radiance (ZSR), which are sky radiance values measured in the
S. Herrero-Anta, R. Román, D. Mateos, R. González, J. C. Antuña-Sánchez, M. Herreras-Giralda, A. F. Almansa, A. F. Almansa, D. González-Fernández, C. Herrero del Barrio, C. Toledano, V. E. Cachorro, Á. M. de Frutos   +12 more
doaj   +1 more source

Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide

Photonics, 2021
A metal–insulator–metal (MIM) waveguide consisting of a circular split-ring resonance cavity (CSRRC) and a double symmetric rectangular stub waveguide (DSRSW) is designed, which can excite quadruple Fano resonances.
Jianfeng Chen, Hao Yang, Zhiyuan Fang, Ming Zhao, Chenbo Xie   +4 more
doaj   +1 more source

Ground-Based Coronagraphy with High Order Adaptive Optics [PDF]

, 2001
We summarize the theory of coronagraphic optics, and identify a dimensionless fine-tuning parameter, F, which we use to describe the Lyot stop size in the natural units of the coronagraphic optical train and the observing wavelength.
Anand Sivaramakrishnan, Christopher D. Koresko, Fried D. L., Glindemann A., Golimowski D. A., Lyot B., Malbet F., Marc J. Kuchner, Noll R. J., Russell B. Makidon, Thomas Berkefeld, Wang T.   +11 more
core   +2 more sources

Entanglement protection of Ince-Gauss modes in atmospheric turbulence using adaptive optics.

Optics Express, 2020
In this paper, we describe the study of the faithful propagation of entangled orbital angular momentum states of light under atmospheric turbulence.
Kuntuo Zhu, Zaisheng Lin, L. Yin, Chuan Wang, Guilu Long   +4 more
semanticscholar   +1 more source

Optomechanical Design and Application of Solar-Skylight Spectroradiometer

Sensors, 2021
Using a solar radiometer is an effective approach for improving the remote sensing of solar irradiance distribution and atmospheric composition. Long-term development of a solar scanning radiometer enables frequent and reliable measurement of atmospheric
Zhaoyang Qi, Jianyu Li, Wenqing Xu, Wenyue Zhu, Fengying Sun, Yao Huang, Gang Xu, Congming Dai   +7 more
doaj   +1 more source

HAPS Based FSO Links Performance Analysis and Improvement With Adaptive Optics Correction

IEEE Transactions on Wireless Communications, 2023
This paper investigates the performance of high altitude platforms high altitude platforms (HAPS) based free-space optical (FSO) communication links including HAPS-to-ground station (downlink), ground-to-HAPS (uplink) and HAPS-to-HAPS (horizontal link ...
Y. Ata, Mohamed-Slim Alouini
semanticscholar   +1 more source

Lidar Measurements of Ozone in the Upper Troposphere – Lower Stratosphere at Siberian Lidar Station in Tomsk

EPJ Web of Conferences, 2016
The paper presents the results of DIAL measurements of the vertical ozone distribution at the Siberian lidar station. Sensing is performed according to the method of differential absorption and scattering at wavelength pair of 299/341 nm, which are ...
Romanovskii O. A., Dolgii S.I., Burlakov V. D., Nevzorov A.A., Nevzorov A. V.   +4 more
doaj   +1 more source