INTERBALL-2 observations of auroral hiss and the aurora dynamics

INTERBALL-2 auroral hiss observations obtained during two polar region cros sings on December 3 and 11, 1996 are presented. Strong variations of amoral hiss intensity and cutoff frequency correlating with amoral dynamics were observed well poleward from the auroral oval. The auroral hiss intensity bu rsts correlated with intensifications of aurora arcs as well as with magnet ic disturbances. The cutoff frequency of auroral hiss depends on the distan ce between aurora and satellite, it decreases when the distance decreases a nd vice verse. Such behavior of cutoff frequency can be explained by propag ation in the whistler mode at wave normal angles near the resonance cone fr om a moving spatially localized source.