Computer Science – Sound
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jhatd...5..131s&link_type=abstract
Johns Hopkins APL Technical Digest (ISSN 0270-5214), vol. 5, Apr.-June 1984, p. 131-137. USAF-sponsored research.
Computer Science
Sound
Auroral Spectroscopy, Ionospheric Sounding, Polar Regions, Satellite-Borne Instruments, Scientific Satellites, Ultraviolet Spectroscopy, Electro-Optics, Equipment Specifications, Optical Measuring Instruments, Vacuum Spectroscopy
Scientific paper
An integral part of the requirements of the HILAT mission was to produce imagery in full daylight of the earth's auroral activity, the aurora borealis, with a selectable 30 angstrom spectral window in the vacuum ultraviolet spectrum ranging from 1100 to 2078 A and a dynamic range from 80 to 10 to the 5th Rayleighs. This resulted in the design of the multimode instrument called the Auroral Ionospheric Mapper. It functioned primarily as an imager with secondary operation as a photometer at preselected wavelengths with the same spectral window or as a spectrometer scanning the full spectral range. Included with the mapper were two fixed wavelength photometers, each with a 10 A spectral window. The design criteria and selections that are presented are related mainly to the imaging functions.
Ogorzalek Bernard S.
Schenkel Frederick W.
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