Tagged: James Clemmons
Speaker: James Clemmons
Affiliation: The Aerospace Corporation
Title: Recent Analyses of In-Situ Thermospheric Measurements
Date: Thursday, April 28, 2011
Time: 3:30 PM Refreshments in CAS 500, 4:00 PM Talk
Place: 725 Commonwealth Ave. CAS 502
Recent analysis of measurements returned by ionization gauges in the thermosphere are presented. These pressure sensors utilize modern electronics to provide good signal-to-noise ratios and have been used to reveal and understand thermospheric features using satellite- and rocket-based platforms. The presentation begins with an overview of the ionization technique and how it was employed on the Streak satellite. Analyses of the data returned by this instrument, called the IGS, from within the southern magnetospheric cusp and within the equatorial ionization anomaly are presented. These analyses give further understanding of the cusp upwelling phenomenon and the equatorial temperature and wind anomaly. Further analyses of data returned from a multiple-sensor ionization gauge carried into the lower thermosphere by a sounding rocket are also presented. The state of progress with utilizing these measurements to determine wind, temperature, and density profiles in the lower thermosphere is reported.