Estimation of electron densities in the lower thermosphere from GUVI 135.6 nm tomographic inversions in support of SpreadFEx F. Kamalabadi1, J. M. Comberiate2, M. J. Taylor3, and P.-D. Pautet3 1University of Illinois at Urbana-Champaign, Department of Electrical and Computer Engineering and Coordinated Science Laboratory, USA 2Johns Hopkins University, Applied Physics Laboratory, USA 3Utah State University, Department of Physics, USA
Abstract. The SpreadFEx campaign was conducted with the goal of investigating potential
neutral atmospheric dynamics influences in seeding plasma instabilities and
bubbles extending to higher altitudes from September to November 2005, with
primary measurements in Brazil. In this paper, we present the results of
space-based UV and ground-based optical observations in support of this
campaign. Specifically, we present multi-dimensional electron density images
obtained tomographically from the 135.6 nm emissions measured by the GUVI
instrument aboard the TIMED satellite that result from radiative
recombination of O+ and compare those with the corresponding 630.0 nm OI
images recorded in the Brazilian sector. The GUVI results provide altitude
vs. longitude information on depleted regions in the ionospheric plasma
density that are complementary to the single-height latitude-longitude images
obtained with the airglow imager.
Citation: Kamalabadi, F., Comberiate, J. M., Taylor, M. J., and Pautet, P.-D.: Estimation of electron densities in the lower thermosphere from GUVI 135.6 nm tomographic inversions in support of SpreadFEx, Ann. Geophys., 27, 2439-2448, doi:10.5194/angeo-27-2439-2009, 2009.