Frequency Range of Coherent Radio Emission
(decimeter bursts)
Above about 300 MHz the typical metric bursts change
  - Type I, II and V disappear
  - Type III narrowband, reverse drift
  - Type IV fine structure, short duration patches
New types appear:
  - narrowband spikes
  - pulsations
Eidgenössische Technische Hochschule Zürich
Swiss Federal Institute of Technology,  Zürich