Examination is made of the residual intensity of energy received between the atmospherics at a frequency of 520 kc. The nature of the junction between the earth's and the sun's atmosphere, and the manner in which an electromagnetic wave travels through an overdense ionosphere are briefly described. The way in which an ionospheric shutter opens and closes is explained, plus examples shown and reduced. A celestial component is found at declination −6°, which has a maximum at 2200 hours right ascension and a minimum at 0700 hours. The maximum intensity is 4×10−20jansky per steradian. Unexpected variations at night may be due to auroral particles of low energy. Manifestations of strong precipitation static and local atmospherics are described. A few observations were made at 1