Physics – Optics
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ijimw...5..643d&link_type=abstract
International Journal of Infrared and Millimeter Waves (ISSN 0195-9271), vol. 5, May 1984, p. 643-653. Research supported by the
Physics
Optics
1
Balloon-Borne Instruments, Far Infrared Radiation, Infrared Imagery, Infrared Telescopes, Solar Instruments, Brightness Temperature, Cassegrain Optics, Platforms, Spectroheliographs, Stratosphere
Scientific paper
Far-infrared solar imaging with a balloon-borne 60-cm-diameter Cassegrain telescope is described and related to previous solar observations in the millimeter range, the IR, visible and UV spectral regions. Solar images have been taken at 50, 80, and 200 microns and represented as brightness-temperature maps. The spectral windows observed correspond to the chromosphere-photosphere transition zone of the solar atmosphere with a characteristic temperature minimum. Temperature enhancements of a few 100 K over the temperature of the quiet sun are reported for active solar regions; e.g., plages and sunspot regions. Far-infrared images provide less spatial resolution but more reliable temperature assignments than corresponding white-light, Ca II K and H-alpha pictures.
Degiacomi K.
Huguenin Daniel
Kneubuehl Fritz K.
Mueller E. A.
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