2.0.0 spase://SMWG/Instrument/AE-D/VAE Visible Airglow Photometer (VAE) VAE 2021-07-20T13:41:27Z The visible airglow experiment provided volume emission rates for several dayglow, nightglow, and auroral optical emission features. A photometer containing two separate optical channels was used. Spectral selection was accomplished with a common filter wheel that contained six interference filters and a dark and calibrate position. The wavelengths measured in pairs (in Angstroms) were 7319 and 4861, 5200 and dark, 5577 and 7319, 4278 and 5200, 6300 and 5577, calibration and 4278, and 4861 and 6300. The two channels were separated in angle by 90 deg. One channel had a large field of view (3 deg half-angle) for high sensitivity, normally pointing toward the local zenith, and the second channel had a small field of view (0.75 deg half-angle) for high spatial resolution, pointing tangent to the surface of the earth when the satellite was in the despun mode. Both channels were protected from stray light contamination during daytime by multistage baffle systems. Photons that had been spectrally and spatially selected were sensed by a pulse-counting photomultiplier system capable of counting at a rate of 5.E6 counts/s. The filters could be operated in several modes, e.g., fixed filter, and automatic filter changes could be synchronized either to satellite orientation or to a fixed-time base. More experiment details can be found in P. B. Hays et al., Radio Sci., v. 8, n. 4, p. 369, 1973. NSSDC has all the useful data that exist from this investigation. spase://SMWG/Person/Paul.B.Hays PrincipalInvestigator NSSDC's Master Catalog https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1975-096A-13 Information about the Visible Airglow Photometer (VAE) experiment on the AE-D mission. Radio Science Journal Article https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/RS008i004p00369 Detailed information about the Visible Airglow Photometer (VAE) experiment on the AE-D mission. Photometer Visible Airglow Photometer (VAE) on AE-D spase://SMWG/Observatory/AE-D