CONTENTS

Policy on Intellectual Property Right (IPR)
 1     Introduction
 2     Selection of frequency bands in the 1-40 GHz range
        2.1     Equipment characteristics that concern link performance analysis
                  2.1.1     Antenna sizes and gains
                  2.1.2     Transmitter power
                  2.1.3     Receiving equipment noise temperature
        2.2     Propagation considerations
        2.3     Results of performance analysis
        2.4     Preferred frequency bands in the 1-40 GHz range
        2.5     Requirement for several allocations that are widely spaced in the spectrum
 3     Selection of frequency bands in the 40-120 GHz range
        3.1     Advantages of higher frequencies
                  3.1.1     Increased link performance
                  3.1.2     Wider bandwidth
                  3.1.3     More accurate measurement of phase and group-delay
                  3.1.4     Shielding from terrestrial interference
        3.2     Basis for frequency selection
        3.3     Frequency-dependent characteristics of interplanetary propagation
                  3.3.1     Interplanetary attenuation
                  3.3.2     Interplanetary sky noise temperature
                  3.3.3     Sky noise temperature at earth stations
                  3.3.4     Velocity of interplanetary propagation
                  3.3.5     Interplanetary scintillation
        3.4     Frequency-dependent characteristics of propagation through an atmosphere
                  3.4.1     Atmospheric attenuation
                  3.4.2     Atmospheric scintillation
        3.5     Frequency-dependent equipment factors
        3.6     Example of link performance analysis
        3.7     Preferred frequency bands in the 40-120 GHz range
 4     Conclusions