| Synoptic radio maps of the sun at 3.3mm, 1970-1973 - :1022 | National Environmental Satellite and Data Information Service (NESDIS)
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Synoptic radio maps of the sun at 3.3mm, 1970-1973
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Filetype[PDF-3.26 MB]

  • Corporate Authors:
    United States, Environmental Data Service, ; World Data Center A for Solar-Terrestrial Physics ;
  • Description:
    "The Aerospace Corporation millimeter radio telescope, which was completed in 1963, has been used extensively for investigations in planetary, solar, and stellar research. It is located in El Segundo, California, at 30°54'53"N and 118°22'30"W. (7h 53m 30s) at a height of 38 m. Maps of the whole solar disk at 90 GHz (3.3-mm wavelength) were obtained routinely on a near daily basis from 1966 through 1973. In October 1973, loss of funding resulted in the discontinuation of the solar program. 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 [Mayfield et al., 1974] 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. Furthermore, 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, which have been discussed by Shimbukuro [1968], 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. The authors can provide separate maps for those individuals who require more detailed data or individual maps for specific days"--Introduction.

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