Observations of auroral LHR noise by the sounding rocket S-310JA-6

Details Observations of auroral LHR noise by the sounding rocket S-310JA-6 Observations of auroral LHR noise by the sounding rocket S-310JA-6

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35..127n&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 35, Jan. 1987, p. 127-137.

Computer Science

Sound

4

Auroral Zones, Electromagnetic Noise, Sounding Rockets, Noise Propagation, Refractivity, Resonant Frequencies, Spectrograms, Wave Generation

Scientific paper

Electromagnetic noises with banded structure were observed on the sounding rocket S-310JA-6 launched at night on August 27, 1978 from Syowa station, Antarctica, which showed a sharply defined lower cutoff at about 4 kHz and an indefinite upper cutoff around 8 kHz corresponding to the lower hybrid resonance frequency of the ambient plasma of the rocket location. Directions of the wave and Poynting vectors and estimated wave refractive indices indicate that the banded noises propagate with large wave normal angles to the geomagnetic field down to the rocket. It may be suggested that such noises excited in the auroral ionosphere by energetic electron streams (not greater than 5 keV) in a Landau instability process propagate down to the rocket.

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