Abstract: An improved calibration method for a chopped pyrgeometer is presented. The chopped pyrgeometer is a system of two radiometers (target radiometer and reference radiometer) modulated by a common chopper. One radiometer ...

Abstract: A new type of pyrgeometer, which uses modulation of the atmospheric radiation by a mechanical chopper, has been built for the use of ground-based and airborne measurement of broadband infrared atmospheric irradiances. The ...