The emissions of broadband electrostatic noise in the near vicinity of the Shuttle Orbiter

Details The emissions of broadband electrostatic noise in the near vicinity of the Shuttle Orbiter The emissions of broadband electrostatic noise in the near vicinity of the Shuttle Orbiter

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35.1373h&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 35, Nov. 1987, p. 1373-1379.

Physics

8

Electrostatics, Noise Spectra, Space Shuttle Orbiters, Broadband, Spacecraft Environments, Two Dimensional Models

Scientific paper

Measurements of the Space Shuttle environment from the STS-3 and Spacelab 2 missions indicate the presence of oblique ion streams and broadband electrostatic noise. A two-dimensional theoretical model is applied to study a possible causal relationship between the ion streams and the broadband noise, especially in terms of the ion acoustic wave and ion-ion wave modes. This model predicts the generation of waves with frequencies ranging from the ion cyclotron frequency up to values greater than the ion plasma frequency, with the maximum growth rate occurring in the 10-kHz range. These results are consistent with the observational data from the STS-3 mission. The model also shows that these two wave modes can coexist only when the wave vectors of the two wave modes are nearly perpendicular. The parametric dependence of the wave instabilities on the plasma parameters and the inclination of the wave propagation vector is also studied.

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