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Instrument: WATS : Wind and Temperature Spectrometer
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The Wind and Temperature (WATS) experiment on the Dynamics
Explorer-2 (DE-2) spacecraft consists of a closed source neutral
mass spectrometer with two rectangular baffles, which are swept
across the incoming neutral beam. The modulation of the neutral
flux by the baffles allows measurement of the temperature and
gas velocity. The mass was commendable and was usually selected
to be N2 or O.