Preferential phase velocities for Type 4 irregularities in the auroral E region plasma
- Univ. of Crete (Greece)
- Univ. of Saskatchewan, Saskatoon (Canada)
At this point there are four identified spectral backscattered peaks for 50 MHz radar observations of aurorae. Two of the types are less common, type 3 and 4, and the authors present data on type 4 echos extracted from ten years of high resolution radar observations. This data is presented to lend support to a previous work based upon few events in which it was proposed that the most prominant property of the type 4 echos was their Doppler velocity of approximately 1000 m/s, roughly twice the ion acoustic speed. The data set the authors have assembled includes several long type 4 events, and an analysis of the Doppler velocities extracted from this data set ranges from 800 to 1200 m/s, with a peaking near 1000 m/s, roughly twice the ion acoustic speed. The authors present this to support the earlier assertion, and to emphasize the necessity for this point to be addressed by theoretical work aimed at explaining these radar spectra.
- OSTI ID:
- 6463577
- Journal Information:
- Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 98:A4; ISSN JGREA2; ISSN 0148-0227
- Country of Publication:
- United States
- Language:
- English
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Very large phase velocities of non two-stream, meter scale irregularities in the high latitude E region ionosphere
Very large phase velocities of non two-stream, meter scale irregularities in the high latitude E region ionosphere
Related Subjects
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AURORAE
BACKSCATTERING
DOPPLER EFFECT
E REGION
EARTH ATMOSPHERE
FREQUENCY RANGE
IONOSPHERE
MEASURING INSTRUMENTS
MHZ RANGE
MHZ RANGE 01-100
PHASE VELOCITY
PLANETARY IONOSPHERES
PLASMA
PLASMA WAVES
RADAR
RANGE FINDERS
SCATTERING
SPECTRAL RESPONSE
VELOCITY