WAdvanced microwave sounding unit
WAdvanced very-high-resolution radiometer
WAlice (spacecraft instrument)
WAlpha particle X-ray spectrometer
WAtmosphere-Space Interactions Monitor
WChemistry and Camera complex
WCosmic Ray Subsystem
WDORIS (satellite system)
WDynamic Albedo of Neutrons
WFIELDS
WFOXSI Sounding Rocket
WGamma Ray Spectrometer (2001 Mars Odyssey)
WGeostationary Earth Radiation Budget
WGlobal-scale Observations of the Limb and Disk
WGravity science (Juno)
WHazcam
WHeat Flow and Physical Properties Package
WIntegrated Science Investigation of the Sun
WISS-RapidScat
WJEDI
WJovian Auroral Distributions Experiment
WJovian Infrared Auroral Mapper
WKepler photometer
WMagnetometer (Juno)
WMars Reconnaissance Orbiter
WMars Radiation Environment Experiment
WMARSIS
WMaterials Adherence Experiment
WMicrowave Radiometer (Juno)
WMini-TES
WMOPITT
WMSSTA
WNavcam
WNeptec Design Group
WOptical PAyload for Lasercomm Science
WOrbiting Carbon Observatory 3
WPlanetary Fourier Spectrometer
WPlasma Wave Subsystem
WPluto Energetic Particle Spectrometer Science Investigation
WRadar for Europa Assessment and Sounding: Ocean to Near-surface
WRalph (New Horizons)
WReentry Breakup Recorder
WREX (New Horizons)
WRock Abrasion Tool
WSeismic Experiment for Interior Structure
WShuttle Radar Topography Mission
WSIR-2
WSpaceborne Imaging Radar
WSpacecraft Atmosphere Monitor
WSWAP (New Horizons)
WSWEAP
WTAGSAM
WTemperature and Winds for InSight
WThermal and Evolved Gas Analyzer
WTotal Ozone Mapping Spectrometer
WTropospheric Emissions: Monitoring of Pollution
WUrey instrument
WUVS (Juno)
WVenetia Burney Student Dust Counter
WWaves (Juno)