The function, design, and ground station requirements of the AMSAT-OSCAR non-commercial space satellite system are described, and various experiments designed for direct student participation in space communications are provided in this text primarily written for the science educator. Six chapters include: (1) an introduction to general satellite orbit problems and solutions, (2) a number of tracking methods for computing the positions of satellites, (3) onboard systems common to most satellites, (4) a complete description of each of the satellites currently in orbit or planned for the near future, (5) specifics for ground stations, and (6) four complete student satellite experiments, 15 detailed project outlines, and 19 suggestions for topics and activities. Appendices include listings of equipment manufacturers and publishers, as well as a glossary of terms. (Author/RAO)