S
WLaser communication in space
WDeep Space Optical CommunicationsA
WEuropean Data Relay System
WFree-space optical communicationB
WGalileo (spacecraft)
WKoruza (technology)C
WLADEE
WLaser Communications Relay DemonstrationD
WLunar Reconnaissance Orbiter
WMars Telecommunications OrbiterE
WNext Mars Orbiter
WOptical PAyload for Lasercomm ScienceF
WPhobos And Deimos & Mars Environment
WPsyche (spacecraft)