title: The 825-1110 angstroms EUV spectrum of Venus.
abstract: On 15 August 1994 we launched the EUVS sounding rocket payload to observe the 825-1110 angstrom region of Venus's far ultraviolet airglow spectrum.  The EUVS telescope/spectrograph obtained good data at five times higher spectral resolution than was previously available in the far ultraviolet.  We present these data and compare our results to those obtained by the Galileo UVS and Venera 11/12 UV spectrophotometers.  We identify several new spectral emission features, including both singly ionized nitrogen and molecular nitrogen in Venus's spectrum.  We also see evidence for electron-impact-induced emission from CO.  Finally, the EUVS data indicate that the "Ar" emissions detected in Venus's far ultraviolet spectrum by Venera 11/12 spectrophotometers are in fact not due to argon, thus eliminating the discrepancy between in situ and remote sensing measurements.
authors.affiliation: Space Science Department, Southwest Research Institute, Boulder, Colorado 80302, USA.  alan@everest.space.swri.edu
authors.forename: S A
authors.initials: SA
authors.lastname: Stern
authors.forename: D C
authors.initials: DC
authors.lastname: Slater
authors.forename: G R
authors.initials: GR
authors.lastname: Gladstone
authors.forename: E
authors.initials: E
authors.lastname: Wilkenson
authors.forename: W C
authors.initials: WC
authors.lastname: Cash
authors.forename: J C
authors.initials: JC
authors.lastname: Green
authors.forename: D M
authors.initials: DM
authors.lastname: Hunten
authors.forename: T C
authors.initials: TC
authors.lastname: Owen
authors.forename: L
authors.initials: L
authors.lastname: Paxton
mesh_terms: D001256:Astronomy / Q000295:instrumentation* / Q000379:methods; D002248:Carbon Monoxide; D005118:Extraterrestrial Environment; D009584:Nitrogen; D013026:Space Flight; D018531:Spacecraft / Q000295:instrumentation*; D013056:Spectrophotometry, Ultraviolet; D018536:Venus
chemical_list: D002248:Carbon Monoxide; D009584:Nitrogen