The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) instrument consists of three sensors, a double focusing magnetic mass spectrometer, a reflectron time-of-flight mass spectrometer, and a neutral and ion dynamics monitor. The primary scientific objectives for the experiment are to: 1) determine the elemental, isotopic molecular composition of cometary atmosphere and ionosphere; 2) measure bulk velocities of neutral and ionized components; 3) study homogeneous and inhomogeneous reactions of neutrals and ions in dusty cometary atmosphere and ionosphere; and 4) investigate possible asteroid outgassing.
urn:nasa:pds:context:instrument:rosina.ro
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