Computer Science – Sound
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cosre..40..241a&link_type=abstract
Cosmic Research, v. 40, Issue 3, p. 241-254 (2002).
Computer Science
Sound
3
Scientific paper
Shock-acoustic waves generated during rocket launches and earthquakes are investigated by a method developed earlier for processing data from a global network of receivers of the GPS navigation system. Disturbances of the total electron content in the ionosphere accompanying the launches of the Proton, Soyuz, and Space Shuttle space vehicles from the Baikonur cosmodrome and Kennedy Space Center launch site in 1998-2000, as well as the earthquakes in Turkey on August 17 and November 12, 1999, were analyzed. It was shown that, regardless of the source type, the impulsive disturbance has the character of an N-wave with a period of 200-360 s and an amplitude exceeding background fluctuations under moderate geomagnetic conditions by a factor of 2-5 as a minimum. The elevation angle of the disturbance wave vector varies from 25° to 65°, and the phase velocity (900-1200 m/s) approaches the speed of sound at heights of the ionospheric F-region maximum. The source location corresponds to a segment of the booster trajectories at a distance of no less than 500-1000 km from the start position and to a flight altitude of no less than 100 km. In the case of earthquakes the source location approximately coincides with the epicenter.
Afraimovich Eduard L.
Kosogorov E. A.
Plotnikov A. V.
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