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Type III solar radio bursts in inhomogeneous interplanetary space observed by Geotail
Author(s) -
Kasahara Yoshiya,
Matsumoto Hiroshi,
Kojima Hirotsugu
Publication year - 2001
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2000rs002456
Subject(s) - physics , interplanetary spaceflight , astrophysics , solar wind , solar physics , spacecraft , interplanetary medium , plasma , computational physics , space physics , astronomy , quantum mechanics
Characteristics of type III solar radio bursts are studied using high‐frequency resolution of the SFA (sweep‐frequency analyzer) of the Plasma Wave Instrument (PWI) on board the Geotail spacecraft. We often observe abnormal type III bursts, which have separated frequency bands or have prolonged tails at particular frequencies. These observations provide observational clues to detect density inhomogeneities in the upstream interplanetary medium. We propose possible models of interplanetary density structures which can account for some type III spectrum structures observed.