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Attenuation distance of low frequency waves upstream of the pre‐dawn bow shock: GEOTAIL and ISEE 3 comparison
Author(s) -
Sugiyama T.,
Terasawa T.,
Kawano H.,
Yamamoto T.,
Kokubun S.,
Frank L. A.,
Ackerson K.,
Tsurutani B. T.
Publication year - 1995
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 - 10.1029/94gl02918
Subject(s) - physics , bow shock (aerodynamics) , attenuation , bow wave , shock wave , shock (circulatory) , amplitude , astrophysics , magnetosheath , geophysics , magnetopause , magnetosphere , optics , solar wind , magnetic field , mechanics , medicine , quantum mechanics
We have made a statistical study of the spatial distribution of low frequency waves (∼0.01–0.1 Hz) in the region upstream of the pre‐dawn to dawn side bow shock (−50 Re < X < 15 Re) using both GEOTAIL and ISEE‐3 magnetometer data. We have found that the wave amplitude dependence on D and X s , where D is the distance from the bow shock and X s the x‐coordinate position of shock foot point of the IMF, can be described by a functional form of A exp( X s / L X ‐ D / L D ), with the characteristic attenuation distances, L X = 62 ± 12 Re and L D = 59 ± 38 Re.