نتایج جستجو برای: rayleigh scattering
تعداد نتایج: 127770 فیلتر نتایج به سال:
Laser guide stars created by Rayleigh scattering provide a reasonable means to monitor atmospheric wavefront distortions for real-time correction by adaptive optics systems. Because of the l 4 wavelength dependence of Rayleigh scattering, short-wavelength lasers are a logical first choice for astronomical laser guide star systems, and in this paper we describe the results from a sustained exper...
In this paper, we examine and suppress the effects of stimulated Brillouin scattering on the phase noise of a 10 GHz signal transmitted over an RF-photonic link. We demonstrate the appearance of interference peaks in the RF phase noise of a microwave signal transmitted through a 10 km optical fiber link. We attribute these peaks to double Brillouin scattering using a reduced model. We determine...
A refined photographic system for solar aureole measurements is described in which a neutral density filter occulting disk blocks the direct sunlight. Experimental data for solar aureoles are presented for several wavelengths from 309 nm to 640 nm and solar zenith angles of up to 88 degrees . The results are compared with a modified single scattering calculation that includes corrections for Ra...
Laser guide stars created by Rayleigh scattering provide a reasonable means to monitor atmospheric wavefront distortions for real-time correction by adaptive optics systems. Because of the λ wavelength dependence of Rayleigh scattering, short wavelength lasers are a logical first choice for astronomical laser guide star systems, and in this paper we describe the results from a sustained experim...
China is planning to launch more and more optical remote-sensing satellites with high spatial resolution and multistep gains. Field calibration, the current operational method of satellite in-flight radiometric calibration, still does not have enough capacity to meet these demands. Gaofen-1 (GF-1), as the first satellite of the Chinese High-resolution Earth Observation System, has been speciall...
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