Policy on Intellectual Property Right (IPR)
 1     Sources of radio noise
 2     Terms for the specification of noise intensity and their interrelationship
 3     Noise levels as a function of frequency
 4     Noise from atmospheric gases and the Earth’s surface
 5     Man-made noise
 6     Brightness temperature due to extra-terrestrial sources
 7     Atmospheric noise due to lightning
 8     The combination of noises from several sources