DSCS-3 (Defense Satellite Communications System 3) are geostationary communications satellites, which provide a robust anti-jam, nuclear hardened capability that supports Department of Defense (DoD) worldwide requirements, White House and Diplomatic communications. They are the follow-on generation of the DSCS-2 satellites.
Geostationary OrbitUS-PM (Upravlenniye Sputnik Passivny Modifikirovanny) (also reported as US-PU) was a solar powered improved EORSAT (Electronic Ocean Reconnaissance Satellite). It used an passive ELINT devices to track naval vessels from space by registering their electronic emmissions.
Low Earth OrbitSoyuz TM-17 was the 17th mission and the 14th long-duration expedition to Mir space station. The mission began on July 1, 1993, 14:32:58 UTC, launching Commander Vasili Tsibliyev, Flight Engineer Aleksandr Serebrov and Research Cosmonaut Jean-Pierre Haigneré into orbit. They docked with Mir two days later. During their stay there, cosmonauts performed EVAs, various station repair and maintenance tasks, and carried out various scientific experiments. Station crew was visited by several Progress resupply spacecrafts, and welcomed aboard the Soyuz TM-18 crew. The mission concluded with a safe landing back on Earth on January 14, 1994, 08:18:20 UTC.
Low Earth Orbit