Initial results from the Helios-1 Search-coil Magnetometer experiment

Main Article Content

F.M. Neubauer
H.J. Beinroth
H. Barnstorf
G. Dehmel


The Helios search-coil magnetometer experiments provide a unique potential for studies of electromagnetic plasma wave modes in the solar wind between 0.3–1 A.U. because of excellent background noise levels, high time-resolution and high accuracy. Daily average spectral densities (γ √Hz) in the frequency range from 4.7–220 Hz show a pronounced increase as the sun is approached with complex superposed variations. Their values have a range of more than an order of magnitude. The shock of January 6, 1975 provides an interesting example for the use of high time-resolution spectral data. The fine structure and the long term variations in wave fields after the perpendicular shock are discussed. Also two interesting examples of "magnetic holes" are presented.

Google Scholar           ARK:



Article Details

How to Cite
Neubauer, F.M., H.J. Beinroth, H. Barnstorf, and G. Dehmel. 1976. “Initial Results from the Helios-1 Search-Coil Magnetometer Experiment”. Journal of Geophysics 42 (1), 599-614.
Bookmark and Share


Dehmel, G., Neubauer, F.M., Lukoschus, D., Wawretzko, J., Lammers, E. (1975) Das InduktionsspulenMagnetometer-Experiment (E4). Raumfahrtforschung. 19:241-244

Galeev, A.A. (1976) Collisionless shocks. In: Williams, D.J. (Ed.) Relationships, Proc. Symp. on Solar Planet., Boulder

Gary, S.P., Gerwin, R.A., Forslund, D.W. (1976) Electromagnetic current instabilities. Phys. Fluids, 19:579-586

Hollweg, J.V. (1975) Waves and instabilities in the solar wind. Rev. Geophys. Space Phys. 13:263-289

Lemaire, J.F., Burlaga, L.F. (1976) Diamagnetic boundary layers in the solar wind: kinetic theory. Submitted to Astrophys. Space Sci.

Neubauer, F.M., Musmann, G., Dehmel, G. (1977) Fast magnetic fluctuations in the solar wind: Helios I. Accepted by J. Geophys. Res.

Russell, C.T., Childers, D.D., Coleman, P.J. (1971) Ogo 5 observations of upstream waves in the interplanetary medium: discrete wave pachets. J. Geophys. Res. 76:845-861

Schindler, K. (1969) Laboratory experiments related to the solar wind and the magnetosphere. Rev. Geophys. :51-75

Smith, E.J. (1973) Identification of interplanetary tangential and rotational discontinuities. J. Geophys. Res., 78:2054-2063

Sonnerup, B.U.O., Cahill, Jr., L.J. (1967) Magnetopause structure and attitude from Explorer 12 observations, J. Geophys. Res. 72:171-183

Turner, J.M., Burlaga, L.F., Ness, N.F., Lemaire, J.F. (1976) Magnetic holes in the solar wind, EOS. Trans. Am. Geophys. Union 57:320