Three-Dimensional Distribution of the Solar Wind Velocity Deduced from IPS (Interplanetary Scintillation) Observations

The IPS observations of the high-latitude source 3C48 are used to derive the distribution of the solar wind velocity in longitude and latitude for periods of several rotations during 1974-1979, by model calculations. The observations during 1974-1978 show the existence of the north polar high-speed (800 km/sec) region. This region extended from the pole down to 45 deg to approx 50 deg latitude for most of 1974-1977, while the region contracted up to 80 deg in 1978 and was hardly observed in early 1979. (Author)
This article is from 'Proceedings of the STIP (Study of Travelling Interplanetary Phenomena) Symposium on Solar Radio Astronomy, Interplanetary Scintillations and Coordination with Spacecraft Held at Narrabri, N.S.W., Australia on 28-30 November 1979,' AD-A130 687. p153-162.