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First results of multi-wavelength measurements of the twilight sky background using all-sky camera with RGB-color CCD conducted in spring and summer of 2016 in central Russia (55.2 deg N, 37.5 deg E) are discussed. They show the effect of…

Atmospheric and Oceanic Physics · Physics 2017-02-14 Oleg S. Ugolnikov , Igor A. Maslov

We describe the reduction of data taken with the PACS instrument on board the Herschel Space Observatory in the Science Demonstration Phase of the Herschel-ATLAS (H-ATLAS) survey, specifically data obtained for a 4x4-deg^2 region using…

Resonant soft X-ray scattering (RSXS) is a powerful technique for probing both spatial and electronic structures within solid-state systems. We present a newly developed RSXS capability at beamline 13-3 of the Stanford Synchrotron Radiation…

As a calibrated laser pulse propagates through the atmosphere, the amount of Rayleigh-scattered light arriving at the VERITAS telescopes can be calculated precisely. This technique was originally developed for the absolute calibration of…

Astrophysics · Physics 2019-08-13 C. M. Hui

The characterization of the optical properties of the atmosphere in the near UV, in particular the tropospheric aerosol stratification, clouds optical depth and spatial distribution are common in the field of atmospheric physics, due to…

Instrumentation and Methods for Astrophysics · Physics 2014-03-25 M. Buscemi , C. Cassardo , M. Cilmo , M. Coco , S. Ferrarese , F. Guarino , A. S. Tonachini , L. Valore , L. Wiencke

A scanning helium microscope typically utilises a thermal energy helium atom beam, with an energy and wavelength (<100 meV, ~0.05 nm) particularly sensitive to surface structure. An angular detector stage for a scanning helium microscope is…

Mesoscale and Nanoscale Physics · Physics 2023-10-11 C. J. Hatchwell , M. Bergin , B. Carr , M. G. Barr , A. Fahy , P. C. Dastoor

Rayleigh Brillouin (RB) scattering profiles for air have been recorded for the temperature range from 255 to 340 K and the pressure range from 640 to 3300 mbar, covering the conditions relevant for the Earth's atmosphere and for planned…

Optics · Physics 2014-05-28 Ziyu Gu , Benjamin Witschas , Willem van de Water , Wim Ubachs

We report a combined theoretical and experimental study of the spectral and polarization dependence of near resonant radiation coherently backscattered from an ultracold gas of 85Rb atoms. Measurements in an approximately 6 MHz range about…

Quantum Physics · Physics 2009-11-10 D. V. Kupriyanov , I. M. Sokolov , N. V. Larionov , P. Kulatunga , C. I. Sukenik , S. Balik , M. D. Havey

To what extent can particulate random media be characterised using direct wave backscattering from a single receiver/source? Here, in a two dimensional setting, we show using a machine learning approach that both the particle radius and…

Computational Physics · Physics 2018-08-15 Artur L. Gower , Robert M. Gower , Jonathan Deakin , William J. Parnell , I. David Abrahams

This paper discusses the multi-wavelength scanning Raman lidar being built at Lidar Division, CEILAP (CITEDEF-CONICET) in the frame of the Argentinean Cherenkov Telescope Array (CTA) collaboration to measure the spectral characteristics of…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 Juan Pallotta , Pablo Ristori , Lidia Otero , Fernando Chouza , Delia Raul , Francisco Gonzalez , Alberto Etchegoyen , Eduardo Quel

Simulating high-resolution Synthetic Aperture Radar (SAR) images in complex scenes has consistently presented a significant research challenge. The development of a microwave-domain surface scattering model and its reversibility are poised…

Computer Vision and Pattern Recognition · Computer Science 2024-01-03 Jiangtao Wei , Yixiang Luomei , Xu Zhang , Feng Xu

Recently, split ring-resonators (SRR's) have been realized experimentally in the near infrared (NIR) and optical regime. In this contribution we numerically investigate light propagation through an array of metallic SRR's in the NIR and…

Materials Science · Physics 2009-05-28 S. Burger , L. Zschiedrich , R. Klose , A. Schädle , F. Schmidt , C. Enkrich , S. Linden , M. Wegener , C. M. Soukoulis

A new physically based method to estimate hemispheric-directional reflectance factor (HDRF) from lightweight multispectral cameras that have a downwelling irradiance sensor is presented. It combines radiometry with photogrammetric computer…

Data Analysis, Statistics and Probability · Physics 2019-05-10 Klaus Schneider-Zapp , Manuel Cubero-Castan , Dai Shi , Christoph Strecha

An atmospheric transparency was measured using a LIDAR with a pulsed UV laser (355nm) at the observation site of Telescope Array in Utah, USA. The measurement at night for two years in $2007\sim 2009$ revealed that the extinction…

Nowadays, tens of satellites carry hyperspectral spectrometers. Such instruments allow decomposing the light that exits the atmosphere from its top into hundreds to thousands of contiguous spectral channels. By analysis of the light…

Instrumentation and Detectors · Physics 2025-04-29 Pierre Dussarrat , Guillaume Deschamps

CO-SLIDAR is a very promising technique for the metrology of near ground $C_n^2$ profiles. It exploits both phase and scintillation measurements obtained with a dedicated wavefront sensor and allows profiling on the full line of sight…

Instrumentation and Methods for Astrophysics · Physics 2021-12-01 Chloé Sauvage , Clélia Robert , Laurent M. Mugnier , Jean-Marc Conan , Jean-Martial Cohard , Khanh Linh Nguyen , Mark Irvine , Jean-Pierre Lagouarde

The integration of fine-scale multispectral imagery with deep learning models has revolutionized land use and land cover (LULC) classification. However, the atmospheric effects present in Top-of-Atmosphere sensor measured Digital Number…

Computer Vision and Pattern Recognition · Computer Science 2024-09-11 Soham Mukherjee , Yash Dixit , Naman Srivastava , Joel D Joy , Rohan Olikara , Koesha Sinha , Swarup E , Rakshit Ramesh

A sensitive laser spectroscopic method has been applied to the quantitative determination of the isotope ratio of helium at the level of 3He/4He = 10^-7 - 10^-5. The resonant absorption of 1083 nm laser light by the metastable 3He atoms in…

Atomic Physics · Physics 2015-06-26 L. -B. Wang , P. Mueller , R. J. Holt , Z. -T. Lu , T. P. O'Connor , Y. Sano , N. C. Sturchio

The attenuation of atmospheric Cherenkov photons is dominated by two processes: Rayleigh scattering from the molecular component and Mie scattering from the aerosol component. Aerosols are expected to contribute up to 30 Wm$^{-2}$ to the…

Instrumentation and Detectors · Physics 2012-12-19 Michael Daniel , George Vasileiadis