Results 91 to 100 of about 3,241 (305)
RADIO-STAR SCINTILLATIONS AND THE AURORAL ZONE
, 1961 A continuous series of observations of scintillations of the radio star, Cassiopeia A, carried out at Saskatoon at a frequency near 53 Mc/s over a period of nearly 4 years has been analyzed.
K. V. Paulson, P. A. Forsyth
core +1 more source
The Geography of Success: A Spatial Analysis of Export Intensity in the Italian Wine Industry
Agribusiness, EarlyView.ABSTRACT This paper investigates the paradox of how Italy's fragmented, SME‐dominated wine industry achieves global export success. Moving beyond purely firm‐centric explanations, we test whether export intensity is spatially dependent, clustering geographically in regional ecosystems.
Nicolas Depetris Chauvin, Jonas Di Vita
wiley +1 more source
Frequency variation of equatorial ionospheric scintillations
, 1976 The fluctuations in the signal strength of v.h.f. and u.h.f. transmissions from satellites received at ground level contain valuable information about ionospheric irregularities.
Raghava Reddy, C. +7 more
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Space weather challenges of the polar cap ionosphere
Journal of Space Weather and Space Climate, 2013 This paper presents research on polar cap ionosphere space weather phenomena conducted during the European Cooperation in Science and Technology (COST) action ES0803 from 2008 to 2012.
Spogli Luca +5 more
doaj +1 more source
Vision Research, 2003 The scintillating grid is a recently discovered visual illusion, created by superimposing white discs on the intersections of orthogonal gray bars on a black background. Even though the entire display is stationary, observers perceive dark spots appearing and disappearing rapidly within some of the white discs.
VanRullen, Rufin, Dong, Timothy
openaire +2 more sources
Annals of Geophysics, 2013 In recent years, several groups have installed high-frequency sampling receivers in the southern middle and high latitude regions, to monitor ionospheric scintillations and the total electron content (TEC) changes.
Luca Spogli +8 more
doaj +1 more source
L-band scintillation activity and space-time structure of low-latitude UHF scintillations
, 2003 Spatial correlation function of intensity scintillation patterns produced by the propagation of a UHF signal through irregularities in the nighttime low-latitude ionosphere is deduced from an analysis of spaced receiver records of such scintillations ...
Sheehan, R. +5 more
core +1 more source
Signal statistics of equatorial nighttime ionospheric scintillations
, 1980 Cumulative probability distribution functions of equatorial nighttime ionospheric scintillations are studied and are found to agree well with the Nakagami m distribution. Relationship between percentage occurrence of scintillations and S 4 index has been
Krishna Murthy, B. V. +2 more
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Scintillations of laser array beams
, 2008 The scintillation index of a laser array beam is analytically derived and numerically evaluated for weak turbulence conditions. On-axis as well as off-axis positions of the receiver plane are considered.
Eyyuboglu, H., Baykal, Y., Cai, Y.
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Odessa Astronomical Publications, 2016 Observations of the four power cosmic radio sources were carried out on the radio telescope (RT) URAN-4 during 1987-1990 and 1998-2007 at the frequencies 20 and 25 MHz.
O. A. Lytvynenko, S. K. Panishko
doaj +1 more source