Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms

Details Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008angeo..26..893l&link_type=abstract

Annales Geophysicae, Volume 26, Issue 4, 2008, pp.893-903

Mathematics

Logic

5

Scientific paper

Sometimes the ionospheric total electron content (TEC) is significantly enhanced during low geomagnetic activities before storms. In this article, we investigate the characteristics of those interesting TEC enhancements using regional and global TEC data. We analyzed the low-latitude TEC enhancement events that occurred around longitude 120° E on 10 February 2004, 21 January 2004, and 4 March 2001, respectively. The TEC data are derived from regional Global Positioning System (GPS) observations in the Asia/Australia sector as well as global ionospheric maps (GIMs) produced by Jet Propulsion Laboratory (JPL). Strong enhancements under low geomagnetic activity before the storms are simultaneously presented at low latitudes in the Asia/Australia sector in regional TEC and JPL GIMs. These TEC enhancements are shown to be regional events with longitudinal and latitudinal extent. The regions of TEC enhancements during these events are confined at narrow longitude ranges around longitude 120° E. The latitudinal belts of maxima of enhancements locate around the northern and southern equatorial ionization anomaly (EIA) crests, which are consistent with those low-latitude events presented by Liu et al. (2008). During the 4 March 2001 event, the total plasma density Ni observed by the Defense Meteorological Satellite Program (DMSP) spacecraft F13 at 840 km altitude are of considerably higher values on 4 March than on the previous day in the TEC enhanced regions. Some TEC enhancement events are possibly due to contributions from auroral/magnetospheric origins; while there are also quasi-periodic enhancement events not related to geomagnetic activity and associated probably with planetary wave type oscillations (e.g. the 6 January 1998 event). Further investigation is warrented to identify/separate contributions from possible sources.

Affiliated with

Also associated with

No associations

Rating

Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1406472