Solar Noise Observations on 10.7 Centimeters

Daily observations of the 10.7-cm. solar radiation show a 27-day recurrent peak which has a strong correlation with the appearance of sunspots. In the absence of large spots the equivalent temperature of the sun is 7.9 × 10
⁴
°K.s of solar noise show a sharp rise lasting one or two minutes and a gradual decline to pre-storm value or to a somewhat higher value. Average burst duration is ten minutes.