During the late Seventies a second generation of absolute cavity radiometers based on the principle of substitution of electrical power for radiative power was developed for solar radiometry. The operating principle and details of the realization of this new radiometer (PMO6-type) are described. To better understand these instruments and to improve their accuracy, the main effort was concentrated on the development of independent laboratory experiments to characterize them. It is demonstrated that this characterization allows an accuracy of solar radiometry of 0.12% from space and of 0.17% from the ground.
© 1986 Optical Society of America
Original Manuscript: March 1, 1986
Published: November 15, 1986
Robert W. Brusa and Claus Fröhlich, "Absolute radiometers (PMO6) and their experimental characterization," Appl. Opt. 25, 4173-4180 (1986)