Height dependence in the power spectrum of diffuse radar aurora

Details Height dependence in the power spectrum of diffuse radar aurora Height dependence in the power spectrum of diffuse radar aurora

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.5733u&link_type=abstract

Journal of Geophysical Research, vol. 86, July 1, 1981, p. 5733-5745.

Physics

25

Auroral Electrojets, Diffuse Radiation, Power Spectra, Pulse Doppler Radar, Radar Measurement, Radio Auroras, Electron Density (Concentration), Height, Radar Antennas, Radar Scattering, Spectral Energy Distribution, Vertical Distribution

Scientific paper

A description is presented of results showing the mean Doppler velocity and accompanying power spectra of the afternoon/evening diffuse radar aurora observed on a 53.5-MHz radar operating at Slope Point, New Zealand. The important parameters include a frequency of 53.5 MHz, a pulse length of 67 microseconds, a two-way antenna beamwidth to half-power of 4.1 deg, and an antenna azimuth of 180 deg geographic. Attention is given to the height effect in mean Doppler velocity, power spectra, the influence of the vertical electron density gradient, and a comparison with previous observations. The presented results reveal a number of new and previously unsuspected features of 3-m irregularities in the radar aurora which cannot be explained at present.

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