WAntarctic Submillimeter Telescope and Remote Observatory
WAtacama Cosmology Telescope
WAtacama Large Millimeter Array
WAtacama Pathfinder Experiment
WAtacama Submillimeter Telescope Experiment
WBLAST (telescope)
WCaltech Submillimeter Observatory
WCerro Chajnantor Atacama Telescope
WHeinrich Hertz Submillimeter Telescope
WHerschel Space Observatory
WJames Clerk Maxwell Telescope
WKOSMA
WLarge Latin American Millimeter Array
WPlanck (spacecraft)
WPOlarization Emission of Millimeter Activity at the Sun
WQUaD
WSouth Pole Telescope
WSubmillimeter Array
WSubmillimeter Wave Astronomy Satellite
WSwedish-ESO Submillimetre Telescope