Battaglio, R. Paul, Jr.

Permanent URI for this collectionhttps://hdl.handle.net/10735.1/2481

R. Paul Battaglio, Jr. is Assistant Professor and Assistant Program Head for Advising and Enrollment in the Public Affairs Program. He teaches graduate courses in public management, public human resource management, and contract and project management. His major research interests over the past several years has concerned comparative policy and administration, comparative political attitudes, and public human resource management reform. Learn more abour Dr. Battaglio on his home and Research Explorer pages.

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Browsing Battaglio, R. Paul, Jr. by Author "0000-0002-5543-5357 (Heelis, RA)"

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    Measurement of Individual H⁺ and O⁺ Ion Temperatures in the Topside Ionosphere
    (Amer Geophysical Union) Hsu, Chih-Te; Heelis, Roderick A.; 0000 0000 3175 0999 (Heelis, RA); 0000-0002-5543-5357 (Heelis, RA); Hsu, Chih-Te; Heelis, Roderick A.
    Plasma temperatures in the ionosphere are associated with both the dynamics and spatial distribution of the neutral and charge particles. During the daytime, temperatures are determined by solar energy inputs and energy exchange between charged and neutral particles. Plasma transport parallel to the magnetic field adds another influence on temperatures through adiabatic processes that are most evident during the nighttime. Previous observations suggest that the topside H⁺ temperature (T_{H⁺+}) should reside between the O⁺ temperature (T_{O+}) and the electron temperature (T_e), and further calculations confirm the preferential heat transfer from the electrons to H⁺ in the topside. In this work we implement a more sophisticated analysis procedure to extract individual mass-dependent ion temperatures from the retarding potential analyzer measurements on the DMSP F15 satellite. The results show that the daytime T_{H+} is a few hundred degrees higher than T_{O+} at all longitudes. The nighttime temperature difference between T_{H+} and T_{O+} is indicative of mass-dependent adiabatic heating and cooling processes across the equatorial region. The ion temperatures and measured plasma flows present clear longitudinal variations that are associated with magnetic declination.
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    The Plasma Environment Associated with Equatorial Ionospheric Irregularities
    (Amer Geophysical Union) Smith, Jonathon M.; Heelis, Roderick A.; 0000-0002-8191-4765 (Smith, JM); 0000-0002-5543-5357 (Heelis, RA); Smith, Jonathon M.; Heelis, Roderick A.
    We examine the density structure of equatorial depletions referred to here as equatorial plasma bubbles (EPBs). Data recorded by the Ion Velocity Meter as part of the Coupled Ion Neutral Dynamics Investigation (CINDI) aboard the Communication/Navigation Outage Forecasting System (C/NOFS) satellite are used to study EPBs from 1600 to 0600 h local time at altitudes from 350 to 850 km. The data are taken during the 7 years from 2008 to 2014, more than one half of a magnetic solar cycle, that include solar minimum and a moderate solar maximum. Using a rolling ball algorithm, EPBs are identified by profiles in the plasma density, each having a depth measured as the percent change between the background and minimum density (ΔN/N). During solar moderate activity bubbles observed in the topside postsunset sector are more likely to have large depths compared to those observed in the topside postmidnight sector. Large bubble depths can be observed near 350 km in the bottomside F region in the postsunset period. Conversely at solar minimum the distribution of depths is similar in the postsunset and postmidnight sectors in all longitude sectors. Deep bubbles are rarely observed in the topside postsunset sector and never in the bottomside above 400 km in altitude. We suggest that these features result from the vertical drift of the plasma for these two solar activity levels. These drift conditions affect both the background density in which bubbles are embedded and the growth rate of perturbations in the bottomside where bubbles originate.