Annex
1 Selection of frequency bands in the
40-120 GHz range that are preferred for deep-space research
1 Introduction
1.1 Advantages of higher frequencies
1.1.1 Increased link
performance
1.1.2 More accurate
measurement of phase and group-delay
1.1.3 Shielding from
terrestrial interference
1.2 Basis for frequency selection
2 Frequency-dependent characteristics of
interplanetary propagation
2.1 Attenuation
2.2 Sky noise temperature
2.3 Velocity of propagation
2.4 Scintillation
3 Frequency-dependent characteristics of
propagation through an atmosphere
3.1 Attenuation
3.1.1 Attenuation by
the atmosphere of the Earth
3.1.2 Attenuation by
atmospheres of other planets
3.2 Sky noise temperature at earth
stations
3.3 Scintillation
4 Frequency-dependent equipment factors
5 Example of link performance analysis
6 Preferred frequency bands