Abstract: Tests were made of the effect of several variables on the performance of the Eppley pyrheliometer. The tests showed: (1) How the output increased with decreasing ambient temperature; (2) how output varied with angle of ...

Abstract: Normal-incidence solar radiation values were measured during the IGY at the South Pole and Little America (Antarctica), at Mauna Loa (Hawaii), Tucson (Arizona), and Blue Hill Observatory (Massachusetts); some results are ...