Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983colo.reptq....t&link_type=abstract
Final Report Colorado Univ., Boulder. Dept. of Astro-Geophysics.
Astronomy and Astrophysics
Astronomy
Ebert Spectrometers, Extreme Ultraviolet Radiation, Irradiance, Solar Radiation, Stellar Spectrophotometry, Astronomical Photometry, Multi-Anode Microchannel Arrays, Solar Spectra, Ultraviolet Astronomy
Scientific paper
Two 1/8-meter Ebert-Fastie spectrometers were refurbished and upgraded in order to measure the solar spectral irradiances between 1160 A and 3100 A. An evacuated 1/4-meter normal-incidence spectrometer was also fabricated for spectral irradiance measurements over the wavelength range from 1250 A to 250 A. Procedures were developed for the calibration of all three instruments utilizing standards at the National Bureau of Standards. The two 1/8-meter spectrometers were flown to measure the solar spectral irradiances near solar maximum on two different dates. Data from these flights were analyzed. The performance of the spectrometers, and the results of an analysis of the variabilities of the solar spectral irradiances over the solar cycles 20 and 21 are discussed.
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