1
Introduction
2 Description of
the space VLBI system
2.1
Telecommunication links for space VLBI
2.1.1 Earth-to-space
(E-s) telecommand link
2.1.2 E-s phase transfer
link for time and frequency synchronization
2.1.3 Space-to-Earth
(s-E) telemetry link for science data
2.1.4 S-E phase transfer
link
3 Technical
characteristics
3.1
Telemetry link
3.1.1 Space VLBI cross
correlation function
3.1.2 Cross-correlation
SNR degradation
3.1.3 Required
interference criterion for the telemetry link
3.1.4 Required bandwidths
for the telemetry channel
3.1.5 Preferred
space-to-Earth telemetry carrier frequencies
3.2
Phase-transfer link
3.2.1 Phase noise
introduced in propagation
3.2.2 Phase noise
introduced in carrier recovery
4 Preferred
frequency bands and bandwidths within the space research service (SRS)
allocated bands
5 Characteristics of
existing and planned space VLBI systems
6 Characteristics
of earth stations