Physics – Geophysics
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984siva.work...73c&link_type=abstract
In NASA, Washington Solar Irradiance Variations on Active Region Time Scales p 73-89 (SEE N84-27635 17-92)
Physics
Geophysics
1
Astronomical Observatories, Faculae, Irradiance, Limb Darkening, Solar Limb, Sunspots, Electrophotometry, Geophysics, Periodic Variations, Spatial Resolution, Spectral Resolution, Time Series Analysis
Scientific paper
Observations and analysis programs being carried out at the San Fernando Observatory are reviewed. A digital analysis of sunspot areas from full disk photographs shows an especially good correlation with areas published in the Solar Geophysical Data Bulletin with scale factor near unity. Results are presented from photoelectric photometry of active regions using the Extreme Limb Photometer. These results suggest energy balance between sunspots and faculae. Preliminary results are presented from a new program of photoelectric photometry using a linear array of diodes. Results are presented for the August 1982 passage of a large active region. This active region caused a maximum dip in the quiet Sun irradiance of about 800 parts per million.
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