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Title: Photospheric and coronal magnetic fields

Research on small-scale and large-scale photospheric and coronal magnetic fields during 1987-1990 is reviewed, focusing on observational studies. Particular attention is given to the new techniques, which include the correlation tracking of granules, the use of highly Zeeman-sensitive infrared spectral lines and multiple lines to deduce small-scale field strength, the application of long integration times coupled with good seeing conditions to study weak fields, and the use of high-resolution CCD detectors together with computer image-processing techniques to obtain images with unsurpassed spatial resolution. Synoptic observations of large-scale fields during the sunspot cycle are also discussed. 101 refs.
Authors:
 [1]
  1. (USAF, Geophysics Laboratory, Hanscom AFB, MA (United States))
Publication Date:
OSTI Identifier:
5030606
Report Number(s):
CONF-910878--
Journal ID: ISSN 0034-6853; CODEN: RGPSB
Resource Type:
Conference
Resource Relation:
Journal Name: Reviews of Geophysics and Space Physics; (United States); Journal Volume: 29; Conference: 20. general assembly of the International Union of Geodesy and Geophysics (IUGG), Vienna (Austria), 11-24 Aug 1991; Related Information: Shea, M. A
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; PHOTOSPHERE; MAGNETIC FIELDS; SOLAR CORONA; CHARGE-COUPLED DEVICES; CORRELATIONS; INFRARED SPECTRA; RESEARCH PROGRAMS; SOLAR GRANULATION; SPATIAL RESOLUTION; SUNSPOTS; USA; ATMOSPHERES; DEVELOPED COUNTRIES; NORTH AMERICA; RESOLUTION; SEMICONDUCTOR DEVICES; SOLAR ACTIVITY; SOLAR ATMOSPHERE; SPECTRA; STARSPOTS; STELLAR ACTIVITY; STELLAR ATMOSPHERES; STELLAR CORONAE 640104* -- Astrophysics & Cosmology-- Solar Phenomena