for Two-Component Power Law Irregularity Spectra Charles S. Carrano, Charles L. Rino Institute for Scientific Research Boston College ABSTRACT We extend the phase screen power law theory for ionospheric scintillation to account for the case where the refractive index irregularities follow a two-component power law spectrum. The twocomponent model includes, as special cases, an unmodified power ...

The attenuation length and refractive index of liquid xenon for its intrinsic scintillation light ðl 1⁄4 178 nmÞ have been measured in a single experiment. The value obtained for the attenuation length is 364718 mm: The refractive index is found to be 1:6970:02: Both values were measured at a temperature of 17071 K: r 2003 Elsevier B.V. All rights reserved. PACS: 78.20.Ci; 29.40.Mc; 78.35.+c

The differential equation for the fourth-order statistical moment of the field of a plane wave propagating in a two dimensional random medium is solved numerically. Results are presented for the scintillation index when the index-of-refraction correlation function of the medium is Gaussian and gamma (ratio of diffraction length to scattering length) is 50. It is pointed out that the solution ha...

We show that the focusing of a random electromagnetic beam by lens gives rise to scintillation index at geometrical focus generally differs from incident beam. In examples we present, produces significant increase index. This observation is particular relevance for optical communication systems in which major cause signal degradation.

Over a two-year period beginning in early 2008, MIT Lincoln Laboratory conducted two free-space optical communication experiments designed to test the ability of spatial beam diversity, symbol encoding, and interleaving to reduce the effects of turbulence-induced scintillation. The first of these exercises demonstrated a 2.7 Gb/s link over a ground-level 5.4 km horizontal path. Signal detection...

where C n(h) is the vertical profile of the refractive index structure constant, V (h) is the vertical profile of the modulus of the wind speed. In the following we always assume that τ0 refers to the wavelength λ0 = 0.5 μm. The differential-exposure scintillation index (DESI) is computed for the smallest 2-cm MASS aperture as a differential index between 1 ms and 3 ms exposures. Instead of bin...

From 2001 January to 2002 June, we monitored PSRs B0329+54, B0823+26, B1929+10, B2020+28 and B2021+51 using the Nanshan 25-m radio telescope of Urumqi Observatory to study their diffractive interstellar scintillation (DISS). The average interval between observations was about 9 days and the observation duration ranged between 2 and 6 hours depending on the pulsar. Wide variations in the DISS pa...

The effect of interplanetary plasma on pulsed pulsar radiation passing through is considered. pulses two rotating radio transients (J0609+16, J1132+25) and a (B0320+39) detected the Large Phased Array (Pushchino observatory) were analyzed. It shown that in observations at frequency 111 MHz, elongations 20o-40o, both an increase decrease number received are observed. change explained by distorti...

We investigate the characteristics of ionospheric scintillation across the entire GPS frequency band spanning the L5–L1 carrier signals (1176 MHz–1575 MHz). Of particular interest is the intensity correlation between carrier pairs, since this dictates the extent to which frequency diversity may be leveraged to mitigate scintillation impacts on navigation accuracy. Since only a few satellites cu...