Ionospheric density enhancement during relativistic electron precipitation | Zendy

Foster J. C. | Zendy; Doupnik J. R. | Zendy; Stiles G. S. | Zendy

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Ionospheric density enhancement during relativistic electron precipitation

Author(s) -

Foster J. C.,

Doupnik J. R.,

Stiles G. S.

Publication year - 1980

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl007i011p00929

Subject(s) - riometer , ionosphere , substorm , electron density , electron precipitation , incoherent scatter , physics , electron , ionospheric absorption , altitude (triangle) , atmospheric sciences , geophysics , computational physics , f region , radar , atomic physics , magnetosphere , plasma , nuclear physics , geometry , mathematics , telecommunications , computer science

The temporal evolution of the ionospheric density enhancement produced by a widespread REP has been observed with the Chatanika Radar. The REP was associated with a substorm particle energization event, and both the ionospheric absorption and density perturbation exhibited a ∼90 min periodicity associated with the particles' longitudinal drift. A 80 keV characteristic energy for the precipitating electrons is deduced from ground‐based and satellite data. At the maximum of the event, electrons deposited ∼50 ergs/cm² sec in the ionosphere, producing a peak density of 5×10 5 cm −3 at 89 km altitude. At that time the radar observed densities greater than 10 5 cm −3 between 70 km and 110 km altitude and riometer absorption at 30 MHz was ∼12 db.

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