Abstract
It has been recognized for some time that large-scale structures in the solar atmosphere such as coronal streamers and coronal holes are associated with interplanetary sector boundaries and high speed streams in the solar wind. The relationship at smaller scales, e.g., the possible connection between the chromospheric network at the coronal base and isolated magnetic flux tube bundles occasionally observed in the interplanetary medium, is considerably less evident. The advent of orbiting coronagraphs, enabling coronal observations out to much greater solar distances, was instrumental in improving our understanding of the complex interconnections between dynamic solar events and travelling interplanetary phenomena. Radio sounding investigations using signals from both spacecraft and natural sources have also helped bridge the still sizeable gap between the optically active inner corona and the in situ regions of interplanetary space. This paper describes the current state of quasi-stationary coronal/interplanetary relationships and concludes with a brief forecast of future exploration of the Sun and inner heliosphere.
