Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...76..117c&link_type=abstract
Solar Physics, vol. 76, Feb. 1982, p. 117-128. Research supported by the National Research Council of Canada.
Astronomy and Astrophysics
Astronomy
7
Airborne Equipment, Chromosphere, Solar Eclipses, Solar Limb, Solar Radiation, Atmospheric Models, Design Analysis, Flight Paths, Infrared Astronomy, Solar Atmosphere
Scientific paper
The total solar eclipse of February 26, 1979, monitored at far infrared wavelengths from the NASA Lear Jet Observatory flying at 12.9 km in the eclipse shadow is analyzed. The resultant eclipse curve for radiation within a bandwidth of 20/cm centered upon 25/cm (400 microns) is measured and analyzed at an equivalent angular resolution of 1 arcsec over a 100-arcsec region adjacent to the limb to provide information on the intensity distribution of continuum radiation close to this limb. The curve is compared with predictions derived from models of the solar atmosphere for the specific geometry of this eclipse and is shown to match most closely that derived from a uniform distribution of radiation across the disk. The result is seen as providing further evidence for the presence in the sun's lower chromosphere of significant inhomogeneity with a scale size of at least 1000 km at this depth.
Boreiko Rita T.
Clark Thomas A.
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