Preferential phase velocities for type 4 irregularities in the auroral E region plasma

Details Preferential phase velocities for type 4 irregularities in the auroral E region plasma Preferential phase velocities for type 4 irregularities in the auroral E region plasma

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.6173h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A4, p. 6173-6179.

Physics

12

Auroral Electrojets, Doppler Radar, E Region, Space Plasmas, Backscattering, Line Spectra, Radar Echoes

Scientific paper

The nature of 50-MHz type 4 auroral backscatter is investigated in view of a large number of events recorded during several periods of continuous wave Doppler radar operation and a data sequence of long lasting type 4 echoes; the mean phase velocity of type 4 waves and its relation to type 1 phase velocity can therefore be studied statistically. On the average, type 4 phase velocities range between 800 and 1200 m/s with the great majority grouping near 1000 m/s. The mean velocities of simultaneous type 4 and type 1 spectrum components are well separated in the Doppler shift range, with an approximate factor of 2 in the type 4 to type 1 velocity ratio. Both spectrum components have the same Doppler polarity, indicating a role for the electric field in type 4 wave generation. On the basis of the widely accepted view that type 1 waves have velocities saturating near the ion acoustic speed, type 4 waves should propagate with velocities at about twice the acoustic speed in the plasma. The present evidence strongly suggests that type 4 waves propagate at preferential velocities near 1000 m/s.

Affiliated with

Also associated with

No associations

Rating

Preferential phase velocities for type 4 irregularities in the auroral E region plasma 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 Preferential phase velocities for type 4 irregularities in the auroral E region plasma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preferential phase velocities for type 4 irregularities in the auroral E region plasma will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1372812