RECOMMENDATION ITU-R SF.1481-1 - Frequency sharing between systems in the fixed service ...
ANNEX 1 - Methodology for studying frequency sharing between high-density systems in the FS using HAPS and the FSS
1 Introduction
2 Calculation procedure
ANNEX 2 - System characteristics for a typical high-altitude platform network
1 The high-altitude platform system
    1.1 Coverage areas
    1.2 Platform station
    1.3 User terminals and gateway stations
    1.4 Antenna radiation patterns
ANNEX 3 - System parameters for FSS
1 System parameters for BSS feeder links
2 System parameters of a GSO FSS Earth-to-space link
ANNEX 4 - Frequency sharing between HAPS systems in the FS and stations in the FSS
1 System parameters for HAPS in the FS
2 Overview of FSS systems
3 Interference analysis
    3.1 Interference from FSS earth stations into HAPS user terminals (Scenario 1)
    3.2 Interference from FSS earth stations into a HAPS platform (Scenario 2)
    3.3 Interference from HAPS user terminals into an FSS satellite (Scenario 3)
    3.4 Interference from a HAPS into an FSS satellite (Scenario 4)
4 Mitigation techniques
    4.1 Introduction
    4.2 Improvement of radiation patterns
    4.3 Increasing the minimum elevation angles of the HAPS user terminals
    4.4 DCA
    4.5 Environmental screening
5 Conclusions