Satellite Measurements of Magnetospheric Poynting Flux
Final rept. Aug 1968-Mar 1990
SRI INTERNATIONAL MENLO PARK CA
Pagination or Media Count:
The first satellite observations of the Magnetospheric Poynting flux are presented for two presented for two passes of the HILAT satellite over the northern polar regions. The simultaneously measured energy input due to precipitating particles is also presented. The Poynting flux is in general agreement with an independent estimate of the Joule dissipation in the upper atmosphere. However, there are localized regions in both orbits of net upward Poynting flux, suggesting a neutral wind dynamo. Evidence for the existence of propagating Alfven waves as well as steady state current systems closed in the ionosphere are also presented. Keywords Magnetospheric poynting flux, Magnetic field fluctuations, Joule heating, Electric field fluctuations.
- Atmospheric Physics