Neutral Particle Composition and Flow Velocity Measurements Made by Earth Observation Satellites

CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS

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Gravity, Magnetic and Geodynamic measurements >
Neutral Particle Composition and Flow Velocity

Measurement Definition*: A directional instrument that measures the amount of neutrals encountered by the spacecraft.

Instrument	Status/ Accuracy	Instrument Description	Measurement Technology	Timeline
NMS Neutral Mass Spectrometer	Operational	The Neutral Mass and velocity Spectrometer (NMS) measures mass composition and velocity of neutral atmospheric species in the 1-40 amu mass and 0.1-2 km/s velocity range.	n/a

* Description adapted from WMO.