Computer Science – Sound
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jatp...46..667k&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 46, Aug. 1984, p. 667-672. Research supported by the Scien
Computer Science
Sound
6
Ionospheric Disturbances, Ionospheric Propagation, Ionospheric Sounding, Polar Regions, Power Spectra, Scintillation, E Region, Eiscat Radar System (Europe), F 2 Region, Ionospheric Electron Density, Satellite Transmission, Signal Fading, Very High Frequencies
Scientific paper
An experiment is described for the routine study of scintillations and ionospheric irregularities at high-latitudes using NNSS satellites with additional coordinated observations by means of the EISCAT ionospheric radar facility. Early results, obtained during the development phase of the experiment, are presented of the power spectra of intensity fluctuations at 150 MHz observed at the equatorwards edge of the high-latitude irregularity zone. The spectra of 165 samples of night-time scintillation recorded during October 1982 to May 1983 show a spectral index with a mean value of -3.58 and a steepening of the spectral slope with increasing S4. Some examples of scintillation arising from irregularities at E-layer heights show spectral indices of magnitude generally smaller than for F-region cases. A few spectra have been found with a clear break in spectral slope at around 10 Hz, suggesting two regimes for irregularities of different scale sizes.
Chandra Harish
Kersley L.
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