Equatorial emissions observed by DEMETER during magnetic activity

Details Equatorial emissions observed by DEMETER during magnetic activity Equatorial emissions observed by DEMETER during magnetic activity

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa21a1522p&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA21A-1522

Physics

2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 2447 Modeling And Forecasting

Scientific paper

During the recovery phase of magnetic storms energetic ions are injected in the equatorial ring current and can trigger new emissions. This paper is related to observations of such waves recorded by the satellite DEMETER at altitudes as low as 700 km. Several examples of these typical electromagnetic emissions with frequency striations observed right around the magnetic equator will be presented. They have a low cut-off frequency close to the local proton gyrofrequency and their upper frequencies can extend up to 800 Hz. For some events the instruments are operated in a burst mode where waveforms of the 6 components of the electromagnetic field are available and a wave propagation analysis is performed to determine the characteristics of these emissions.

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