Results 61 to 70 of about 957,049 (196)
Frequency dissemination with free-space optical links [PDF]
, 2010 Optical clock technology is very certain to be integrated in the next high precision time standards. The demand for higher accuracy in time synchronization makes the use of free-space optical links necessary for frequency dissemination, especially if ...
Mata Calvo, Ramon +2 more
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Monitoring AerosolPollutant Layer by Lidar Combined with some other Instruments [PDF]
Journal of Systemics, Cybernetics and Informatics, 2006 Lidar is a powerful tool for monitoring vertical profile of aerosol pollutant layer (APL) and its variation. The extinction-to-backscatter ratio, S1, is a crucial parameter for quantitative interpretation of lidar data.
Huanling Hu +3 more
doaj
An embedded adaptive optics real time controller [PDF]
, 2007 The design and realisation of a low cost, high speed control system for adaptive optics (AO) is presented. This control system is built around a field programmable gate array (FPGA).
Saunter, Christopher D. +1 more
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CHARM-F: The Airborne Integral Path Differential Absorption Lidar for Simultaneous Measurements of Atmospheric CO2 and CH4 [PDF]
, 2010 CHARM-F (CO2 and CH4 Atmospheric Remote Monitoring – Flugzeug) is DLR’s airborne Integral Path Differential Absorption lidar for simultaneous measurements of the column weighted-average dry-air mixing ratios of atmospheric carbon dioxide and methane ...
Schweyer, Sebastian +11 more
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Earth and Space Science, 2021 Dust storms pose a serious threat to air quality and public health through large‐scale, long‐distance transport. In early April 2018, two severe dust storm events occurred in the Taklimakan and Gobi Deserts in northwestern China.
Hao Yang +7 more
doaj +1 more source
Turbulence characterisation for Astronomical Observatories [PDF]
, 2012 Atmospheric turbulence has two effects in astronomy; (i) the broadening of the point spread function due to phase fluctuations limiting the resolution of imaging and (ii) producing intensity fluctuations known as scintillation.
SHEPHERD, HARRY,WILLIAM +1 more
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The use of liquid crystal adaptive optics devices in astronomy [PDF]
, 1991 Images obtained from large astronomical telescopes are distorted and blurred by the effects of the atmosphere. In order to compensate for this, an adaptive optics system can be incorporated downstream from the telescope focus.
Love, G.D, Love, Gordon D.
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Optical Phenomena in the Atmosphere [PDF]
Nature, 1944 THE "Solar Halo Phenomenon" described by G. H. Archenhold in Nature of September 30 was referred to in recent correspondence in The Times and was explained in a short article by me in The Times of August 31. The occurrences of August 9 seem to have been particularly striking.
openaire +2 more sources
Remote Sensing of Atmospheric Methane with IR OPO Lidar System
Atmosphere, 2020 A differential absorption lidar (DIAL) system designed on the basis of optical parametric oscillators (OPO) with nonlinear KTiOAsO4 (KTA) and KTiOPO4 (KTP) crystals is described.
Semyon Yakovlev +3 more
doaj +1 more source
University of Arizona, Institute of Atmospheric Physics, Progress Report No. 2
, 1955 This title from the Institute of Atmospheric Physics Reports collection is made available by the Department of Hydrology & Atmospheric Sciences and the University Libraries, University of Arizona.
Braham, Roscoe R., Jr.
core +4 more sources