Browsing Duke Faculty Articles by Author "Han, Feng"

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Midlatitude daytime D region ionosphere variations measured from radio atmospherics

Han, Feng; Cummer, Steven (AMER GEOPHYSICAL UNION, 2010)

We measured the midlatitude daytime ionospheric D region electron density profile height variations in July and August 2005 near Duke University by using radio atmospherics (or sferics for short), which are the high-power, ...
Midlatitude nighttime D region ionosphere variability on hourly to monthly time scales

Han, Feng; Cummer, Steven (AMER GEOPHYSICAL UNION, 2010)

Significant temporal variability of the nighttime D region is well known, but its inaccessibility means that the time scales, magnitudes, and sources for that variability are not well understood. We probed the ionospheric ...