Journal ArticleDOI
Periodic fadings in VHF radio-satellite transmissions during the solar eclipse on 23 October 1976
TLDR
In this article, the authors reported that large-magnitude periodic fadings during the eclipse of 23 October 1976 indicate that the eclipse is associated with generation of wave disturbance affecting radio-satellite transmissions in the upper VHF.Abstract:
THE localised time-dependent cooling action of the lunar shadow during an eclipse may generate gravity waves at ionospheric heights1,2. The bow wave thus formed would be detected at great distances from the eclipse path. Experimental data in the northern hemisphere from the eclipse on 7 March 1970, indicated the presence of gravity waves in the F-region, deduced from the incoherent backscatter technique3, vertical incidence soundings4, and recordings of the Faraday rotation angle of VHF transmissions from geostationary satellites5. The detected travelling ionospheric disturbance (TID) had the horizontal phase velocity of 400m s−1 (ref. 4) and 620±120 m s−1 (ref. 5). TID was reported to travel north to south4, or 279±25° east of north5. We report here our observations of large-magnitude periodic fadings during the eclipse of 23 October 1976, which indicate that the eclipse is associated with generation of wave disturbance affecting radio-satellite transmissions in the upper VHF. The waves had a 40-km wavelength, and propagated from north to south with a velocity of 556 m s−1.read more
Citations
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Journal ArticleDOI
Atmospheric gravity waves generated in the high‐latitude ionosphere: A review
TL;DR: A review of theoretical and observational results describing atmospheric gravity wave (AGW)/traveling ionospheric disturbance (TID) phenomena at high latitudes is presented in this paper.
Journal ArticleDOI
Three-dimensional imaging of single molecules solvated in pores of poly(acrylamide) gels.
TL;DR: Individual fluorescent molecules and individual singly labeled proteins were observed in the water-filled pores of poly(acrylamide) gels by far-field microscopy, enabling extended study of single fluorophores in aqueous environments.
Journal ArticleDOI
Recent progress in satellite radio beacon studies with particular emphasis on the ATS-6 radio beacon experiment
TL;DR: The ATS-6 Radio Beacon Experiment (ATS6) as mentioned in this paper was the first satellite radio beacon experiment to study the ionosphere, which was performed in the early 1970s and showed that the plasmaspheric content is highly sensitive to solarterrestrial disturbance, reaching a minimum on the third day of a storm and may take between 10 and 20 days of partial filling and emptying to recover.
Journal ArticleDOI
The study of the effect of solar eclipses on the ionosphere based on satellite beacon observations
TL;DR: In this article, the authors studied the relationship between the amount of depletion in the total electron content and the percent obscuration of the sun during a total solar eclipse and the time delay from the maximum obscuration to the maximum depletion.
Journal ArticleDOI
Bow and stern waves triggered by the Moon's shadow boat
TL;DR: In this article, an analysis of the Hilbert-Huang transform (HHT) is applied to study ionospheric TEC (total electron content) derived from ground-based GPS receivers in Taiwan and Japan.
References
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Journal ArticleDOI
Atmospheric gravity waves induced by a solar eclipse, 2
G. Chimonas,Colin O. Hines +1 more
Journal ArticleDOI
Possible detection of atmospheric gravity waves generated by the solar eclipse.
M. J. Davis,A. V. Da Rosa +1 more
Journal ArticleDOI
Traveling ionospheric disturbances observed near the time of the solar eclipse of 7 March 1970
TL;DR: In this paper, the authors analyzed radio sounding data collected on 7 March 1970 with primary interest in detecting any traveling ionospheric disturbances generated by the solar eclipse of that day, as postulated by Chimonas and Hines.
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Possible detection of atmospheric gravity waves generated by the solar eclipse.
M. J. Davis,A. V. Da Rosa +1 more