The primary purpose of this article is to bring to the attention of the geophysical community a new international study of solar-terrestrial relationships dealing with the linkages between the heliosphere and the various regions of geospace. This program, for which proposals should be submitted by late May of this year, is designed to maximize the scientific return from the many satellite, groundbased, and theoretical studies that will be undertaken in the first half of the 1990s.
From the time of the International Geophysical Year (1958), studies of global planetary phenomena have featured the development of research programs that called for intensive collaboration among scientists from many nations. The interdisciplinary nature of these studies transcended the mandates of most of the international scientific organizations who help arrange meetings and provide a venue for working groups to meet on a periodic basis (e.g., International Union of Geodesy and Geophysics, Committee on Space Research, Union Radio Scientifique Internationale, International Astronomical Union). The Scientific Committee on Solar-Terrestrial Physics (SCOSTEP) was formed to help develop and assist in the operations of interdisciplinary programs designed to investigate the nature of the solar-terrestrial interaction.