Observations of interplanetary scintillation during the 1998 Whole Sun Month: a comparison between EISCAT, ORT and Nagoya data

Observations of interplanetary scintillation (IPS) allow accurate solar win d velocity measurements to be made at all heliographic latitudes and at a r ange of distances from the Sun. The data may be obtained with either single , double or multiple antennas, each requiring a different method of analysi s. IFS data taken during the 1998 whole sun month (30th July-31st August 19 98) by EISCAT, the ORT (Ooty Radio Telescope), India, and the Nagoya IFS sy stem, Japan, allow the results of individual methods of analysis to be comp ared. Good agreement is found between the velocity measurements using each method, and when combined an improved understanding of the structure of the solar wind can be obtained.