Physics – Optics
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978stin...7928106m&link_type=abstract
Synoptic radio maps of the sun at 3.3mm, 1970-1973 World Data Center A for Solar-Terrestrial Physics
Physics
Optics
Radio Telescopes, Solar Radio Emission, Thermal Mapping, Cassegrain Optics, Isotherms, Solar Activity, Solar Magnetic Field, Spectroheliographs
Scientific paper
A millimeter radio telescope, located in El Sequndo, California, was used to obtain maps of the whole solar disk at 90 GHz (3.3-mm wavelength) routinely on a near daily basis from 1966 through 1977. Since then only infrequent observations of the Sun have been made to calibrate the radiometer. The format used in presenting millimeter radio observations is the same as that employed for previous results and is based on investigations of variations in the 3.3-mm emission and its correlation with photospheric magnetic fields, faculae, and centers of activity. The regions of enhanced millimeter emission are well-defined, stable features that can be readily identified and followed during their disk passage. The relatively infrequent, transient phenomena associated with flares, usually lie at the resolution limit of the antenna. As a result, synoptic maps are considered not only the most informative presentation but the most concise. Separate maps are available for those individuals who require more detailed data or individual maps for specific days.
Mayfield Earle B.
Shimabukuro Fred I.
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