<?xml version="1.0" encoding="UTF-8"?> <Spase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.spase-group.org/data/schema" xsi:schemaLocation="http://www.spase-group.org/data/schema http://www.spase-group.org/data/schema/spase-2_2_6.xsd"> <Version>2.2.6</Version> <Instrument> <ResourceID>spase://CDPP/Instrument/AMDA/MAVEN/NGIMS</ResourceID> <ResourceHeader> <ResourceName>NGIMS</ResourceName> <AlternateName>Neutral Gas and Ion Mass Spectrometer</AlternateName> <ReleaseDate>2017-03-01T22:37:00Z</ReleaseDate> <Description>The Neutral Gas and Ion Mass Spectrometer (NGIMS) measures the composition and isotopes of thermal neutrals and ions. Goals: *Determine structure and variation of neutral atmosphere and ionosphere with altitude over the globe from the homopause to above the exobase where the neutral gas can escape *Provide a basis for the study of thermospheric energetics, transport, circulation and formation of the ionosphere *Reveal the effects of lower atmospheric effects on the composition of the upper atmosphere and escape Observations: *Basic structure of the upper atmosphere (major species He, N, O, CO, N2, NO, O2, Ar, and CO2) and ionosphere from the homopause to above the exobase *Stable isotope ratios, and variations Technical details and heritage: *Quadrupole Mass Spectrometer with open and closed sources *Open source: neutrals and ions *Closed source: non-reactive neutrals *Mass Range: 2 – 150 Da *Mass Resolution: 1 Da *Modes: scan entire spectra or adapt to fixed masses *Sensitivity: 10-2 (counts/s)/(particles/cm-3) *Heritage from Galileo GPMS, Pioneer Venus ONMS, CASSINI INMS, Contour NGIMS </Description> <Contact> <PersonID>spase://SMWG/Person/Paul.R.Mahaffy</PersonID> <Role>PrincipalInvestigator</Role> </Contact> <InformationURL> <Name>NGIMS web page, Summary sheet </Name> <URL>http://lasp.colorado.edu/home/maven/science/instrument-package/ngims/</URL> </InformationURL> </ResourceHeader> <!-- Quadroupole Mass Spectrometer --> <InstrumentType>MassSpectrometer</InstrumentType> <InvestigationName/> <OperatingSpan> <StartDate>2013-11-18T13:28:00</StartDate> <!--StopDate>2014-12-16T00:00:00</StopDate--> <!-- Note : Mission phases : multiple tags possible --> <Note>Mars arrival : 2014-09-28T19:24:00</Note> </OperatingSpan> <ObservatoryID>spase://CDPP/Observatory/AMDA/MAVEN</ObservatoryID> </Instrument> </Spase>