STEREO-Wind Direction Finding of a Stream Interaction Region

On 13 March 2010 a long duration event was seen by spectrographs onboard the STEREO-B and Wind spacecraft. The event started at about 13:00 UT and ended at approximately 05:00 UT on 14 March. The event presents itself as a slow drifting quasi-continuous emission in a very narrow frequency band, ranging from about 425 MHz to approximately 625 MHz. We study the propagation behavior of the radio event, which appears to be a stream interaction region (SIR). Using radio direction-finding techniques, we locate the SIR in the interplanetary space and then correlate these results with visible and in-situ data from instruments onboard STEREO and Wind.