Travelling Interplanetary Disturbances Detected Using Interplanetary Scintillation at 327 MHz

Details Travelling Interplanetary Disturbances Detected Using Interplanetary Scintillation at 327 MHz Travelling Interplanetary Disturbances Detected Using Interplanetary Scintillation at 327 MHz

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996soph..166..379j&link_type=abstract

Solar Physics, Volume 166, Issue 2, pp.379-401

Physics

25

Scientific paper

Based on the advance predictions of two flare-generated shock fronts, obtained from the Space Environment Centre (SEC, NOAA, Boulder), observations of interplanetary scintillation (IPS) were carried out with the Ooty Radio Telescope (ORT) on a grid of appropriately located sources during the period 31 October to 5 November, 1992. Solar wind velocities were derived by fitting model spectra to the observed spectra and two travelling interplanetary disturbances were detected. Both disturbances were traced back to an active region on the Sun which was located close to a large coronal hole. The roles of flares and coronal holes in producing such disturbances are examined and it is shown that in the present case both the coronal hole and the active region probably played key roles in generating the two IPS disturbances.

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