2009 Workshop:SC 23:Drake abstract

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Poynting Flux From the DMSP F-15 Satellite During September 2005

K.A. Drake and D. J Knipp

Using multiple satellites, we have the ability to track events from the Sun through the interplanetary medium and examine the effects on the Earth’s atmosphere. Using data from the DMSP F15 satellite, we have calculated vertical Poynting flux along the high-latitude polar region. For each hemisphere pass, the integrated value of Poynting flux is compared to solar wind parameters, IMF direction and strength, and thermospheric neutral density response identified with CHAMP satellite data. Using the Poynting flux values as a proxy for energy into the M-I-T system, we produce comparative studies between Poynting flux into the high-latitude region and the subsequent thermosphere neutral density response. In the past year we have completed multiple case studies and present the results of a one month interval from 1 – 30 September 2005. Current models rely on the Dst (SYM-H) index and we note that SYM-H correlates better with neutral density measurements except during northward IMF. Poynting flux values during this time correlate significantly better with ASYM-H.