Physics
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...78..317o&link_type=abstract
Solar Physics, vol. 78, June 1982, p. 317-331.
Physics
2
Coronal Holes, Radar Cross Sections, Ray Tracing, Solar Corona, Solar Radar Echoes, Geomagnetism, K Lines, Long Term Effects, Power Spectra, Scattering Coefficients, Solar Terrestrial Interactions
Scientific paper
Radar scans of the solar corona at 38 MHz carried out at El Campo, TX from 1961-1969 are reviewed in order to form a numerical model for the average observed cross sections with various geometries and density fluctuations. The range centroid and width of the radar beam encountering the sun are formulated, along with the projected cross section of the solar photosphere in terms of the received power. The numerical model comprises simulation of the propagation of radar signals through coronal models with differing density structures. Results are discussed for cases of scattering and no scattering. A power spectrum analysis of the signal received from the sun after transmission showed that the radar had struck the sun, although influenced by harmonics of the solar rotation frequency. The radar is concluded to have detected large scale coronal features in the centroid region only, but no definite identification of the observed coronal structures has yet been done.
Newkirk Gordon A.
Owocki Stanley P.
Sime D. G.
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