Electric fields with a large parallel component observed by the Freja spacecraft: Artifacts or real signals?

Details Electric fields with a large parallel component observed by the Freja spacecraft: Artifacts or real signals? Electric fields with a large parallel component observed by the Freja spacecraft: Artifacts or real signals?

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...103..215c&link_type=abstract

Journal of Geophysical Research, Volume 103, Issue A1, p. 215-224

Physics

22

Ionosphere: Electric Fields, Ionosphere: Instruments And Techniques, Magnetospheric Physics: Electric Fields, Magnetospheric Physics: Instruments And Techniques

Scientific paper

Using plasma wave data sampled by the Freja spacecraft from the topside ionosphere during auroral conditions, the possible existence of electric fields with an intense parallel component (a few tens of millivolts per meter) with respect to the Earth's magnetic field is discussed. When Freja crosses large-amplitude solitary electromagnetic structures (ΔE~100mV/m and ΔB~10nT, identified as being solitary kinetic Alfvén waves), strong electric spikes are sometimes detected along a direction almost parallel to the static magnetic field. The possible sources of errors due to the plasma inhomogeneities and/or to the magnetic connection between the electric probe and the spacecraft body are reviewed and discussed. In particular, using an indirect technique based on the reconstruction of the electric field hodograms, it is shown that these sources of errors have no influence on our conclusions. Unless unknown mechanisms strongly affect the validity of double-probe measurements in some circumstances, it is then concluded that an electric field with a parallel component 2-3 orders of magnitude larger than expected from the theory of kinetic Alfvén waves can develop in the topside ionosphere.

Affiliated with

Also associated with

No associations

Rating

Electric fields with a large parallel component observed by the Freja spacecraft: Artifacts or real signals? 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 Electric fields with a large parallel component observed by the Freja spacecraft: Artifacts or real signals?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric fields with a large parallel component observed by the Freja spacecraft: Artifacts or real signals? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1611182