Survey of Galactic Radio-Noise at 200 Mc/s

Abstract

A survey of galactic radio-noise at 200 Mc/s, has been made for the region of the sky south of declination 45 °N. Results are expressed graphically in watts m.^-2 (c/s.)^-1 (steradian)^-1, the maximum value being 20 x 10^-21 W. m.^-2 (c/s.)^-1 (steradian)^-1 at galactic latitude -3° and longitude 322°. Corrections have been made for the aerial beam width. No measurement has been made of the residual intensity from the coldest parts of the sky (the galactic poles) and this quantity, when known, should be added to the results quoted. The galactic noise provides a permanent and convenient standard for solar noise measurements, and its intensity for this purpose is evaluated.