A simple and novel real-time interframe operator substantially reduces short-lived noisy scintillations in low-lightlevel video imaging systems that use image intensifiers.

The limitations imposed by Mie scattering and atmospheric-induced beam scintillations on a direct line-of-sight optical link were investigated at 632.8 nm. The experimental investigations were carried out in Kuwait during the summer season when the local climate is characterized by high daily temperatures and frequent dust storms. Beam attenuation and scintillation data coupled with climatologi...

In Liquid Scintillation Counting (LSC), the scintillating source is part of the measurement system and its detection efficiency varies with the scintillator used, the vial and the volume and the chemistry of the sample. The detection efficiency is generally determined using a quenching curve, describing, for a specific radionuclide, the relationship between a quenching index given by the counte...

Aims. Scintillation noise is a major limitation of ground-based photometric precision. Methods. An extensive dataset of stellar scintillation collected at 11 astronomical sites world-wide with MASS instruments was used to estimate the scintillation noise of large telescopes in the fast photometry and traditional long-exposure regime. Results. Statistical distributions of the corresponding param...

Scintillation observations can provide useful information about binary pulsar orbits. In some cases the information is not available otherwise; in other cases it allows standard orbital analyses to be carried further in testing General Relativity and other aspects of the binary system. We report on the first use of scintillation arcs to determine information about a binary system. We analyzed p...

Oceanic turbulence caused by salinity and temperature fluctuations underwater affects the characteristics of a transmit laser beam resulting in turbulence-induced intensity (i.e., scintillation) at receiver. optical wireless communication (OOWC) systems employ receiver lens aperture to focus collected light onto photodetector. This way, averaging takes place scintillation on detector is reduced...

Abstract GNSS satellite signals are affected by the media when traversing Earth’s atmosphere, and performance of based positioning navigation is correlated with these effects. In ionosphere, number electrons along signal path which can be quantified total electron content. The focus this article scintillation effects caused in Arctic rate content index, ROTI, used as a measure scintillation. Da...

This paper describes an early-stage evaluation of a purpose-designed extraction/detection system that can be deployed by non-specialists either on-site or as part of a mobile laboratory. The system comprises three main components; (1) an optimised compact extraction system for recovery of radionuclides from the waste form; (2) an extraction test strip designed to recover the radionuclides from ...

The structure constant of the atmospheric refractive index is used for characterizing the turbulence strength and for predicting the scintillation of electromagnetic waves in atmosphere. It is measured continuously in Prague using an optical scintillometer. First monthly and seasonal statistics obtained from the data gathered in the summer 2011 are provided. Lognormal distribution parameters ar...

We analyze the ergodic capacity and epsilon-outage capacity of coherent optical links through the turbulent atmosphere. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator shot noise, for both passive receivers and those employing active modal compensation of wavefront phase distortion. We study the effect of various para...