RME (USA 52), identified by NORAD_CAT_ID 20497 and OBJECT_ID 1990-015B, is a satellite manufactured by BALL for the SDIO under the mission of conducting SDI experiments. Launched on February 14, 1990, from Launch Pad LC17B at AFETR using the Delta 6920-8 launch vehicle, RME has dimensions of 1.6 meters in length, diameter, and span with a dry mass of 1000 kg. The satellite is powered by solar cells and batteries and features a dodecahedral cylindrical shape with a radar cross-section (RCS) of 4.28 square meters. RME's purpose aligns with its mission to conduct SDI experiments, though specific details on its configuration, equipment, motor type, and other specifications are not provided.