THE 3-DIMENSIONAL EXTENT OF A HIGH-SPEED SOLAR-WIND STREAM

A primary goal of the Ulysses mission is to study the 3-dimensional st ructures making up the interplanetary medium, an example of which is t he high speed solar wind stream observed in situ by Ulysses beginning in July 1992. In order to study the longitudinal extent of this stream as a function of Ulysses' increasing heliographic latitude, a second point of reference is required to separate spatial and temporal variat ions. Such a reference point is provided at Jupiter by a class of Jovi an radio bursts, whose occurrence rate varies in a predictable way wit h solar wind speed. Using the in situ and remote observations from Uly sses, the extent of the high speed stream at similar to 5 AU is mapped and compared to the associated coronal hole boundary on the Sun.