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  • Author or Editor: David Rind x
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William L. Donn and David Rind

Abstract

The relatively low frequency of the sonic boom generated by the Concorde SST permits propagation in the form of infrasound to long range with small attenuation. Signal characteristics at long range are a function of atmospheric propagation parameters. When the relationship of propagation to signal is understood, then propagation conditions can be determined by inversion with good accuracy. We show here how signal recorded at Palisades, New York, from the Dulles-bound SST reveals direction and speed of stratospheric wind variations diurnally and seasonally and also gives details of at least local circulation change at times of stratospheric warmings.

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David Rind, William L. Donn, and W. Robinson

Abstract

Rocketsonde observations and infrasound results are used to investigate the variability of the summer stratopause region during one month in summer. It is found that fluctuations of 2–3 days and about 16-day periods are evident, which appear to be vertically propagating. In this month the 2–3 day oscillations have an amplitude envelope equal in period to the longer period oscillations, implying a connection between the two phenomena. Observations of the diurnal tide and shorter period variability during the month are also presented.

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