The climatology of the quiet nighttime low-latitude ionosphere

Details The climatology of the quiet nighttime low-latitude ionosphere The climatology of the quiet nighttime low-latitude ionosphere

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa52a..04t&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SA52A-04

Mathematics

Logic

2415 Equatorial Ionosphere, 2437 Ionospheric Dynamics

Scientific paper

Long term measurement datasets have recently become available from several satellite missions. The TOPEX satellite obtains the total electron content (TEC) from ~1200 km orbit and the DMSP satellites measure the in-situ ion densities at ~800 km, while the GUVI instrument onboard the TIMED satellite retrieves the electron density profile below ~550 km altitude. TOPEX and TIMED are slowly precessing satellites that are able to obtain complete local time observations approximately every two months. The DMSP satellites are sun-synchronous and sample the ionosphere at least 4 discrete local times. This rich dataset allows us to examine a climatological picture of the nighttime low-latitude ionosphere. In this paper we describe the structure of the nighttime ionosphere as observed by three different sets of measurements, including the latitudinal separation of the equatorial arcs, the asymmetry of the peak densities as a function of longitude and local time. We also will compare these results with those from the IRI model. The observed climatology is essential for understanding low-latitude electrodynamics.

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