Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3609817o&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 9, CiteID L09817
Physics
7
Radio Science: Radar Atmospheric Physics (1220), Atmospheric Processes: Thermospheric Dynamics (0358), Ionosphere: Meteor-Trail Physics, Ionosphere: Ionospheric Irregularities, Ionosphere: Ionosphere/Atmosphere Interactions (0335)
Scientific paper
This article describes a new method of measuring wind velocity profiles between 93 km and 110 km altitude by tracking non-specular meteor echoes as neutral winds transport the plasma trails. This requires a large VHF radar with interferometric capability able to point nearly perpendicular to the geomagnetic field. A small data sample from the Jicamarca Radio Observatory allows the measurement of horizontal wind speeds and directions with a range resolution of a few hundred meters. These observations show speeds reaching 150 m/s and sometimes changing by as much as 100 m/s over a 6 km altitude range. At the best times, these measurements can be made with only a few minutes of data. With some refinement of the data collection and analysis techniques, this technique should produce high resolution images of lower thermospheric winds as they change in both altitude and time.
Bass Elizabeth
Chau Jorge L.
Close Sigrid
Oppenheim Meers M.
Slowey Nicholas O.
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