Auroral zone electric fields from DE 1 and 2 at magnetic conjunctions

Details Auroral zone electric fields from DE 1 and 2 at magnetic conjunctions Auroral zone electric fields from DE 1 and 2 at magnetic conjunctions

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.7479w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Aug. 1, 1985, p. 7479-7494. Previously announced in STAR as N85-29421

Physics

140

Auroral Zones, Electric Fields, Magnetic Fields, Alignment, Field Aligned Currents, Graphs (Charts), Invariance, Latitude, Magnetometers, Mapping, Plasma Probes, Wavelengths

Scientific paper

Nearly simultaneous measurements of auroral zone electric fields are obtained by the Dynamics Explorer spacecraft at altitudes below 900 km and above 4,500 km during magnetic conjunctions. The measured electric fields are usually perpendicular to the magnetic field lines. The north-south meridional electric fields are projected to a common altitude by a mapping function which accounts for the convergence of the magnetic field lines. When plotted as a function of invariant latitude, graphs of the projected electric fields measured by both DE-1 and DE-2 show that the large-scale electric field is the same at both altitudes, as expected. Superimposed on the large-scale fields, however, are small-scale features with wavelengths less than 100 km which are larger in magnitude at the higher altitude. Fourier transforms of the electric fields show that the magnitudes depend on wavelength. Outside of the auroral zone the electric field spectrums are nearly identical. But within the auroral zone the high and low altitude electric fields have a ratio which increases with the reciprocal of the wavelength. The small-scale electric field variations are associated with field-aligned currents. These currents are measured with both a plasma instrument and magnetometer on DE-1.

Affiliated with

Also associated with

No associations

Rating

Auroral zone electric fields from DE 1 and 2 at magnetic conjunctions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Auroral zone electric fields from DE 1 and 2 at magnetic conjunctions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auroral zone electric fields from DE 1 and 2 at magnetic conjunctions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-760050