Results 11 to 20 of about 414,153 (280)

Turbulent parameters at different heights in the atmosphere. Shack–Hartmann wavefront sensor data

open access: yesSolar-Terrestrial Physics, 2022
The paper presents the results of studies of wavefront distortions at different heights in the atmosphere. We have used measurement wavefront data to determine optical turbulence parameters along the line of sight of the Large Solar Vacuum Telescope ...
Shikhovtsev A. Y.   +5 more
doaj   +1 more source

Optical Design of a Novel Wide-Field-of-View Space-Based Spectrometer for Climate Monitoring

open access: yesSensors, 2022
We report on a near-infrared imaging spectrometer for sensing the three most prominent greenhouse gases in the atmosphere (water vapor, carbon dioxide and methane).
Luca Schifano   +3 more
doaj   +1 more source

The SOFIA Telescope [PDF]

open access: yes, 2000
The SOFIA telescope as the heart of the observatory is a major technological challenge. I present an overview on the astro-nomical and scientific requirements for such a big airborne observatory and demonstrate the impact of these requirements on the ...
Krabbe, Alfred
core   +2 more sources

Receiving vectors of muon telescope of cosmic ray station Novosibirsk

open access: yesSolar-Terrestrial Physics, 2016
The method of receiving vectors allows us to determine cosmic ray anisotropy at every moment of time. Also, the method makes it possible to study fast anisotropy fluctuations related to the interplanetary medium dynamics.
Yanchukovsky V.L.   +4 more
doaj   +1 more source

Wishing for the Watch Face in Jonathan Swift’s “The Progress of Beauty”

open access: yesABO : Interactive Journal for Women in the Arts 1640-1830, 2018
This article illuminates the technological underpinnings of Jonathan Swift’s satire, “The Progress of Beauty” (1719), by exploring how eighteenth-century poetics of beauty and scientific progress pit human against automaton.
Jantina Ellens
doaj   +1 more source

The new HiVIS spectropolarimeter and spectropolarimetric calibration of the AEOS telescope [PDF]

open access: yes, 2006
We designed, built, and calibrated a new spectropolarimeter for the HiVIS spectrograph (R 12000-49000) on the AEOS telescope. We also did a polarization calibration of the telescope and instrument.
Breger M.   +6 more
core   +3 more sources

Comparative analysis of three mode-selection methods for solid-state lasers [PDF]

open access: yesE3S Web of Conferences, 2021
In the Nd3+:YAG pulsed Q-switched laser system, the selective output of several low order modes of TEM00, TEM01 and TEM11 is realized by adding a iris diaphragm, a telescope or a Gaussian mirror at an appropriate position in the resonator, and the three ...
Sun Yan
doaj   +1 more source

Studies of the nature of the low-energy, gamma-like background for Cherenkov Telescope Array [PDF]

open access: yes, 2017
The upcoming Cherenkov Telescope Array (CTA) project is expected to provide unprecedented sensitivity in the low-energy (
Adamczyk, Katarzyna   +4 more
core   +1 more source

Extragalactic HI Surveys at Arecibo: the Future [PDF]

open access: yes, 2008
Starting in the 1970s, the Arecibo 305m telescope has made seminal contributions in the field of extragalactic spectroscopy. With the Gregorian upgrade completed in the late 1990s, the telescope acquired a field of view.
Emmanuel Momjian   +2 more
core   +2 more sources

Low Vision Aids: Visual Outcomes and Barriers in Children with Low Vision

open access: yesDelhi Journal of Ophthalmology, 2019
Aims: To study the demographic profile, cause of low vision, visual outcome and the barriers in using low vision aids (LVA). Design: Prospective observational clinical study.
V. R. Venkataramanan   +5 more
doaj   +1 more source

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