SOLAR-WIND VELOCITY AND NORMALIZED SCINTILLATION INDEX FROM SINGLE-STATION IPS OBSERVATIONS

The recently refurbished Ooty Radio Telescope in southern India was used in a two-month campaign of interplanetary scintillation (IFS) observations in collaboration with the Cambridge IFS array in England during April-May 1992. The unique feature of this campaign was that, for the first time, scintillation enhancements were predicted in real time by observing solar events on 7-8 May, 1992 and then detected at both Ooty and Cambridge. Also, for the first time, high spatial resolution (similar to 100 sources sr(-1)) solar wind all-sky velocity maps were obtained at Ooty. Good consistency is found between the IFS observations from both observatories and in-situ shocks detected at Earth by IMP-8. Yohkoh soft X-ray images were used to infer the generation of a coronal mass ejection on 7 May, 1992.