Physics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...74..509c&link_type=abstract
(ESA and European Physical Society, ESLAB Symposium on Physics for Solar Variations, 14th, Scheveningen, Netherlands, Sept. 16-1
Physics
2
Irradiance, Radiometers, Solar Maximum Mission, Solar Radiation, Aeronomy, Climatology, Metrology, Solar Physics, Solar Spectra
Scientific paper
Methods of precise measurement of the total and spectral irradiance of the sun are discussed, noting the importance of accuracy to solar physics, aeronomy, and climatology. An accuracy of 1/50,000 is stated as the goal, with a resolution exceeding 1/100,000. Data from Nimbus 6, 7, and the Solar Maximum Mission (SMM) are cited as lacking the necessary precision, although SMM did indicate the necessity of a one Hz sampling rate. Accurate irradiance evaluations are contingent on observations from space, the use of advanced metrological instruments, the frequency of measurements, and characterization of the instruments in air and vacuum before deployment. Radiometric measurements are reviewed to show a possible resolution of 0.02-0.05 percent in the operative comparison of radiative energy to electrical energy; additional comparisons between simultaneous radiometric readings are mandated to confirm the projected accuracy.
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