Abstract

Already the first spectral observations of the large type IV (and II + IV) bursts revealed a rich variety of the fine structures of the radio emission, in particular, a modulation of the continuum emission in the form of narrow stripes in the emission and absorption. Stripes in emission and absorption against the continuum background of solar type IV radio bursts in the meter and decimeter wave ranges are traditionally subdivided into two kinds: zebra pattern (ZP) and fiber bursts (FB) (or intermediate drift bursts (IDB)) (Kuijpers 1975a; Slottje 1981). Since the end of the seventies, microwave observations of solar emission with high temporal and spectral resolution have also shown fine structures: millisecond spikes (with a duration of single spikes of a few tens of milliseconds), and fast pulsations, usually superimposed on a smooth continuum emission (Benz 1993). We could also find some indications of a probable zebra pattern in the microwave range in Isliker and Benz (1994).

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