Measurement of the potential drop across the earth's collisionless bow shock

Details Measurement of the potential drop across the earth's collisionless bow shock Measurement of the potential drop across the earth's collisionless bow shock

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9.1033f&link_type=abstract

Geophysical Research Letters, vol. 9, Sept. 1982, p. 1033-1036.

Computer Science

Sound

26

Bow Waves, Electric Potential, Geoelectricity, Satellite Sounding, Shock Waves, Direct Current, Electric Field Strength, Electrical Measurement, International Sun Earth Explorer 1, International Sun Earth Explorer 2, Kinetic Energy, Particle Energy, Propagation Velocity, Satellite-Borne Instruments

Scientific paper

The normal component of the dc electric field measured on ISEE-1 ordinarily exhibits an enhancement of a few mV/m over both upstream and downstream values at the earth's bow shock. Using the measured relative velocity between the shock and the spacecraft (from the ISEE-1/2 time delay in the magnetometer data), it is possible to transform the observed E enhancement to a potential drop (delta phi). For a subcritical shock the potential drop is found to be very close to the measured change of particle kinetic energy (delta phi, approximately 280 V on day 330, 1977), whereas for a supercritical shock the potential drop is only a fraction of the measured change of kinetic energy (delta phi, approximately 140 V on day 324, 1977).

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