Satellite watching or tracking, a hobby involving tracking human satellites
satellite | Sirius Satellite Radio | XM Satellite Radio | communications satellite | Satellite | satellite television | Natural satellite | Communications satellite | Astro (satellite TV) | Their Eyes Were Watching God | Sleeping Satellite | Satellite television | International Telecommunications Satellite Organization | Six Finger Satellite | Polar Satellite Launch Vehicle | natural satellite | Geostationary Operational Environmental Satellite | Defense Meteorological Satellite Program | whale watching | Television Infrared Observation Satellite | Public Radio Satellite System | HMS Satellite | Arab Satellite Communications Organization | Watching Ellie | Upper Atmosphere Research Satellite | Transformational Satellite Communications System | Tracking and Data Relay Satellite System | Tracking and Data Relay Satellite | The Sheriff and the Satellite Kid | SPOT (satellite) |
Perry and his students (who formed the Kettering Group along with some other volunteers worldwide) continued their satellite tracking work for a number of years, using only inexpensive shortwave radio equipment and painstakingly using the Doppler effect to deduce the satellites' orbits.