Journal ArticleDOI
Electrostatic and electromagnetic turbulence associated with the earth's bow shock
Paul Rodriguez,Donald A. Gurnett +1 more
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In this paper, simultaneous measurements of the electric and magnetic field spectral densities in the earth's bow shock were made by a plasma wave experiment on the Imp 6 spacecraft. The frequency range of the plasma wave detector was 20 Hz to 200 kHz.Abstract:
Simultaneous measurements were made of the electric and magnetic field spectral densities in the earth's bow shock by a plasma wave experiment on the Imp 6 spacecraft. The frequency range of the plasma wave detector was 20 Hz to 200 kHz. Electric fields were measured with high-sensitivity 100-m long dipole antennas and magnetic fields were measured with single-turn loop antennas. Two components are distinguished in the electric field spectrum in the bow shock: one component has a broad peak centered in the region 200-800 Hz, while the other component increases monotonically with decreasing frequency. The magnetic field spectrum has only one component that increases monotonically with decreasing frequency and has an upper cutoff frequency near the local electron gyrofrequency. This magnetic field turbulence is judged to be caused by whistler mode waves. The monotonic component of the electric field spectrum is thought to be the electric field spectrum of these whistler mode waves.read more
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Journal ArticleDOI
Electron velocity distributions near the Earth's bow shock
W. C. Feldman,Roger C. Anderson,S. J. Bame,S. P. Gary,J. T. Gosling,David J. McComas,Michelle F. Thomsen,Götz Paschmann,M. M. Hoppe +8 more
TL;DR: A survey of electron velocity distributions measured near the earth's bow shock between October 1977 and December 1978 using the Los Alamos/Garching plasma instrumentation aboard ISEE 2 is presented in this article.
Journal ArticleDOI
Plasma waves in the distant magnetotail
TL;DR: The results of an extensive study of plasma waves in the distant magnetotail on the basis of measurements from the Imp 8 spacecraft are discussed in this article, where three distinctly different types of plasma wave turbulence are detected.
Book ChapterDOI
A quarter century of collisionless shock research
TL;DR: In this paper, a review highlights conceptual issues that have both governed and reflected the direction of collisionless shock research in the past quarter century, including MHD waves and their steepening, the MHD Rankine-Hugoniot relations, the supercritical shock transition, nonlinear oscillatory wave trains, ion sound anomalous resistivity and the resistive-dispersive transition for subcritical shocks, ion reflection and the structure of supercritical quasi-perpendicular shocks, the earth's foreshock, quasi-parallel shocks, and finally, shock acceleration processes.
Journal ArticleDOI
Bipolar electrostatic structures in the shock transition region: Evidence of electron phase space holes
TL;DR: In this paper, the authors present observations of intense, bipolar, electrostatic structures in the transition region of the terrestrial bow shock from the Wind spacecraft and interpret the observations as small scale convecting unipolar potential structures, consistent with simulations of electron phase space holes.
Journal ArticleDOI
The resolved layer of a collisionless, high β, supercritical, quasi‐perpendicular shock wave: 1. Rankine‐Hugoniot geometry, currents, and stationarity
J. D. Scudder,André Mangeney,Catherine Lacombe,C. C. Harvey,T. L. Aggson,Roger R. Anderson,J. T. Gosling,G. Paschmann,Christopher T. Russell +8 more
TL;DR: In this paper, data collected by the ISEE dual-spacecraft mission (on November 7, 1977) on a slowly moving, supercritical, high-beta, quasi-perpendicular bow shock are presented, and the local geometry, spatial scales, and stationarity of this shock wave are assessed in a self-consistent Rankine-Hugoniot-constrained frame of reference.
References
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Journal ArticleDOI
Average and unusual locations of the Earth's magnetopause and bow shock
TL;DR: The average and unusual locations of magnetopause and bow shock positions observed by IMP spacecraft were analyzed in this paper, showing that the bow shock position is unusual for the Earth's magnetic field.
Journal ArticleDOI
Vela 4 plasma observations near the Earth’s bow shock
TL;DR: In this paper, the Vela 4B analyzer was used to detect the earth's bow shock in the magnetosheath of the earth, and it was shown that the jump in proton temperature is 2 to 4 times greater than the jump of electron temperature.
Journal ArticleDOI
Electromagnetic radiation trapped in the magnetosphere above the plasma frequency
Donald A. Gurnett,Robert R. Shaw +1 more
TL;DR: In this article, an electromagnetic noise band was observed in the outer magnetosphere by the Imp 6 spacecraft at frequencies from about 5 to 20 kHz, and it was concluded that this noise must be trapped in the low density region between the plasmapause and magnetopause boundaries.
Journal ArticleDOI
Preliminary results from the Ogo 1 Search Coil Magnetometer: Boundary positions and magnetic noise spectra
TL;DR: Magnetopause location, boundary positions and magnetic noise spectral data obtained with triaxial search coil magnetometer aboard Ogo I satellite was obtained by using spectral data from the Ogo II satellite.
Journal ArticleDOI
Nonthermal electrons and high-frequency waves in the upstream solar wind, 1. Observations
TL;DR: In this article, the authors used Ogo 5 interplanetary particle and wave observations from March 11 and 12, 1968, to demonstrate that oscillations near the characteristic upper hybrid and electron plasma frequencies are produced when nonthermal electrons (Ee≳700-800 ev) flow upstream.