Abstract
An equation was derived to predict the influence upon net radiation measurements of the effects of a net radiometer's shadow upon the underlying surface. The predictions of the equation were verified by two independent experiments. It was found that for a miniature net radiometer (6cm diam.) operated over dry, bare soil on a cloudless day, that the surface induced effects do not become significant until the radiometer is lowered below a height of 20cm. The optimum level of operation in light of this effect and that of the intervening layer of air between the net radiometer and the soil appeared to be 25±5cm.
