Physics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983esasp.183..259p&link_type=abstract
In ESA Sixth ESA Symp. on European Rocket and Balloon Programs and Related Res. p 259-261 (SEE N83-33397 21-46)
Physics
Auroras, Electrostatic Waves, Space Plasmas, Dipole Antennas, Electron Precipitation, High Frequencies, Metrology
Scientific paper
A method for the metrology of space plasmas, based on the reception of electrostatic waves by a pair of small dipole antennas was tested in PORCUPINE project rocket experiments. Both dipoles received signals from the natural electrostatic microfield in the plasma; the cross spectrum of these random signals was measured. Data obtained during a weak auroral activity are presented. Natural electrostatic emissions were observed around the upper hybrid frequency and also around the three-halves harmonic of the electron gyrofrequency. A linear calculation shows that the amplitudes of these emissions are above the thermal noise level of the plasma. To explain the observations, it is necessary to take into account the presence of low-energy precipitating electrons (1 to 20 eV), which are highly anisotropic.
Illiano Jean-Marie
Pottelette Raymond
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