Physics
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.9025h&link_type=abstract
Journal of Geophysical Research, vol. 87, Nov. 1, 1982, p. 9025-9034. Research supported by the U.S. Department of Energy, Cent
Physics
4
Cosmic Noise, Dipole Antennas, International Sun Earth Explorer 3, Satellite Antennas, Solar Wind, Electron Energy, Noise Propagation, Noise Spectra, Signal To Noise Ratios
Scientific paper
The properties of the 1/f noise detected at the terminals of ISEE 3 antennas are described and related to the solar wind parameters. The 1/f noise was observed with the radio receivers of the three-dimensional radio mapping experiment using the S and Z dipole antennas. The noise spectra contained a negative spectral index component at frequencies lower than 0.7 of the plasma frequency, and 5-10 times the predicted thermal noise for the Z antenna. S-antenna measurements of the 1/f component revealed it to be deeply spin modulated with a minimum electric field in the direction of the solar wind. Modulation increases with increasing frequency, becomes negligible when the 1/f intensity is negligible with respect to the thermal noise, and increases with solar wind velocity. The possibilities that the noise is due either to waves or currents are discussed.
Couturier P.
Feldman William C.
Hoang Sang
Steinberg Jean-Louis
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