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Linear-array apertures for in-flight dynamic solar calibration of radiometric channels for Earth radiation-budget applications
The zero-frequency gain of nonimaging radiometers used in Earth radiation-budget applications is usually verified by a procedure that allows the instrument to view the Sun through an appropriate attenuating aperture and then equates its response to the known attenuated solar constant. However, channel intercomparison often requires that data from a low-resolution, relatively slow instrument such as an active-cavity radiometer be compared with data from a high-resolution, fast instrument such asdoi:10.1364/ao.33.005617 pmid:20935961 fatcat:misivo4n65hatf2dyrfo4g6lzu