Radio wave scattering in the outer heliosphere

The Voyager 1 and 2 plasma wave instruments have observed low‐frequency (1.5–4 kHz) radio waves apparently generated near the heliopause. The waves are found in two distinct bands. Power at the lower frequencies centered on 1.78 kHz shows no modulation when the spacecraft is rolled about the Earth‐s...

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Bibliographic Details
Published in:Journal of Geophysical Research 2000-03, Vol.105 (A3), p.5149-5156
Main Authors: Armstrong, J. W., Coles, W. A., Rickett, B. J.
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
Interplanetary space
Solar system
Waves and discontinuities
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Summary:The Voyager 1 and 2 plasma wave instruments have observed low‐frequency (1.5–4 kHz) radio waves apparently generated near the heliopause. The waves are found in two distinct bands. Power at the lower frequencies centered on 1.78 kHz shows no modulation when the spacecraft is rolled about the Earth‐spacecraft line, indicating that the radiation is isotropic. Power in the higher band centered on 3.11 kHz shows roll modulation as high as 60%, indicating that the source of the radiation is quite compact, subtending an angle
ISSN:0148-0227
2156-2202
DOI:10.1029/1999JA900471