Charles Swenson

TL;DR: Immel et al. as discussed by the authors showed that ionospheric densities vary with the strength of nonmigrating, diurnal atmospheric tides that are, in turn, driven mainly by weather in the tropics.

TL;DR: In this paper, a longitudinal wave number four pattern in the magnetic latitude and concentration of the F region peak ion density when measured at a fixed local time was found to be persistent over many days around equinox during magnetically quiet conditions close to solar maximum but can be dominated by other processes such as cross-equator winds during other periods.

TL;DR: In this paper, the authors present an analysis of global quiet time morphology of the equatorial anomaly (EA) as measured by images of nighttime ionospheric 135.6 nm radiation taken by the Global Ultraviolet Imager (GUVI) on NASA's TIMED spacecraft.

TL;DR: In this paper, an investigation into the dynamics and layer structure of the postsunset ionosphere prior to the onset of equatorial spread F (ESF) took place during the NASA EQUIS II campaign on Kwajalein Atoll on August 7 and 15, 2004.

TL;DR: In this paper, a retromodulator-based low-power laser communication system for small, low Earth orbiting satellites was demonstrated using a high-altitude balloon, which reached a float altitude of 31 km and collected the modulated light reflected from the payload.