WAdvanced Composition Explorer
WAqua (satellite)
WARGOS (satellite)
WAura (satellite)
WCALIPSO
WCHIPSat
WCloudSat
WCONTOUR
WDawn (spacecraft)
WDeep Impact (spacecraft)
WDeep Space 1
WDeep Space 2
WEarth Observing-1
WExtreme Ultraviolet Explorer
WFar Ultraviolet Spectroscopic Explorer
WFermi Gamma-ray Space Telescope
WGenesis (spacecraft)
WGeoEye-1
WGeotail
WGPS IIR-1
WGravity Probe B
WICESat
WIMAGE (spacecraft)
WJason-1
WKepler space telescope
WLandsat 7
WMars Climate Orbiter
WMars Global Surveyor
W2001 Mars Odyssey
WMars Pathfinder
WMars Polar Lander
WMESSENGER
WMidcourse Space Experiment
WMiTEx
WNEAR Shoemaker
WNeil Gehrels Swift Observatory
WNOAA-19
WNOAA-20
WOpportunity (rover)
WOrbiting Carbon Observatory 2
WØrsted (satellite)
WPhoenix (spacecraft)
WPolar (satellite)
WRadarsat-1
WRAX-2
WSoil Moisture Active Passive
WSpirit (rover)
WSpitzer Space Telescope
WStardust (spacecraft)
WSTEREO
WTHEMIS
WTIMED
WUSA-193
WUSA-205
WUSA-206
WWide-field Infrared Survey Explorer
WWilkinson Microwave Anisotropy Probe
WWind (spacecraft)