FAIRPLAY: Revealing Personal Lifestyles

Radio Techniques for Probing the Terrestrial Ionosphere

“…One of the first successful uses of a narrowbeam switchable lobe riometer was reported by Ansari (1963). The antenna system is a 4"-x 4"-square array of 64 Turnstile antennas employing circular polarization, which produces 49 antenna-independent beams which are sampled in 1 s. The half-power beam width of the zenithai beam is ~ 12° (Detrick 1984;Rosenberg, 1990;see Figs. The array had a half-power beam width of 12° which was switchable from 12° north of the zenith to 12° south of the zenith and operated on a frequency of 36 MHz.…”

“…(IRIS) system developed by Rosenberg in 1990 and described briefly in Section 7.2 of this monograph. (IRIS) system developed by Rosenberg in 1990 and described briefly in Section 7.2 of this monograph.…”