ITU-R RA.314-11 PDF

This Recommendation provides information regarding the preferred frequency bands for radio astronomical measurements up to 1 000 GHz. Tables 1 and 2 list the frequency bands associated with atomic and molecular transitions; Table 3 lists the frequency bands preferred for observations of radio continuum emission; Table 4 lists the frequency bands for several specific applications of redshifted neutral hydrogen. Figures in the Annex illustrate the natural processes that dictate the preferred frequency bands for radio astronomy.