TOMOGRAPHIC RECONSTRUCTION OF 630.0 NM EMISSION STRUCTURE FOR A POLAR-CAP ARC

Citation
Ra. Doe et al., TOMOGRAPHIC RECONSTRUCTION OF 630.0 NM EMISSION STRUCTURE FOR A POLAR-CAP ARC, Geophysical research letters, 24(9), 1997, pp. 1119-1122
Citations number
11
Categorie Soggetti
Geosciences, Interdisciplinary
ISSN journal
00948276
Volume
24
Issue
9
Year of publication
1997
Pages
1119 - 1122
Database
ISI
SICI code
0094-8276(1997)24:9<1119:TRO6NE>2.0.ZU;2-6
Abstract
Monochromatic imagers located at two sites in the Canadian Arctic were operated concurrently during the poleward transit of a duskside sun-a ligned polar cap are on 19 February 1996. The are was observed by both stations in 630.0 nm images over a 5-min period. Profiles of 630.0 nm brightness versus elevation angle were extracted from pairs of images along a great circle defined by the two ground stations. These data w ere then supplied as inputs to a tomographic reconstruction for the ar c-related 630.0 nm volume emission rate in a vertical (latitude vs. al titude) plane: eta(630)(lat,z). The time evolution of eta(630)(lat,z) structure for this polar cap are indicates that a modification to the electron source energy distribution and not a thermospheric process (s uch as neutral heating and plasma diffusion/decay) controlled the are- related 630.0 nm emission.