Computer Science – Sound
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.291..187w&link_type=abstract
In ESA, European Rocket and Balloon Programs and Related Research p 187-191 (SEE N90-13826 05-42)
Computer Science
Sound
Echo Sounding, Eiscat Radar System (Europe), Gravity Waves, Mesosphere, Polar Regions, Atmospheric Turbulence, Energy Dissipation, High Frequencies, Summer
Scientific paper
Mesospheric observations made with the European Incoherent Scatter (EISCAT) very high frequency radar are reported. A correlator program to determine pulse-to-pulse correlation functions for Barker coded double pulses is applied. During a total of 5 hours a relatively weak Polar Mesosphere Summer Echo (PMSE) is observed at a height of 85 km with its intensity increasing to a maximum at intervals of approximately 27 minutes. In the region below the PMSE layer, height profiles of vertical velocity showed an atmospheric gravity wave, also with a period of about 27 minutes. In most cases the maximum intensity of the PMSE corresponded to the maximum upward velocity associated with the wave. It is suggested that particle precipitation, adiabatic cooling, and breaking at the mesopause, play a role in creating the conditions for PMSEs to be observed.
Hall Carter
Roettger Juergen
Vaneyken A. P.
Williams J. S. P.
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