Other
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.1685s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Feb. 1, 1991, p. 1685-1695.
Other
2
Electrostatic Probes, Interplanetary Medium, Noise Measurement, Satellite Antennas, Solar Wind, Space Plasmas, Instrument Errors, International Sun Earth Explorers, Plasma Frequencies
Scientific paper
In order to obtain accurate measurements of electrostatic noise spectra on board the ISEE 1 satellite, near interplanetary shock waves, a detailed theoretical and numerical study of an antenna consisting of a pair of spherical probes is performed. The quasi-thermal electrostatic noise observed theoretically on the antenna is computed by assuming that the solar wind plasma can be properly represented by the sum of two Maxwellian distributions (core and halo). The dependence of the electrostatic spectra on the antenna length and on the different plasma parameters, particularly on the density and temperature ratio of the core and the halo, is studied. By also taking into account the instrumental noise and the shot noise on the antenna, a calibration factor can be precisely determined for the antenna considered. In a first approximation, these theoretical results are only slightly modified when types of distributions other than Maxwellians are considered.
Solomon Jacques
Touzin Frederic
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