Annex 1 Methodology for the
calculation of the worst-case interference levels from non‑geostationary
FSS systems using HEOs into geostationary FSS networks operating in some
frequency bands between 10 and 30 GHz where RR Nos. 22.5C and 22.5D are not
applied

1 Data concerning the non-GSO FSS system

Space-to-Earth transmissions

Earth-to-space transmissions

2 Data concerning the GSO FSS network

Receive earth station sensitivity

Satellite receive sensitivity

3 Calculation of downlink interference into the GSO network

4 Calculation of uplink interference into the GSO FSS network

5 Multiple non-GSO FSS systems

Annex 2 Methodology for the calculation of the worst-case interference
levels from non‑GSO FSS systems using HEOs into GSO FSS satellite
networks operating in some frequency bands between 10 and 30 GHz where RR
Nos. 22.5C or 22.5D are applicable

1 Data concerning the non-GSO FSS system

Space-to-Earth transmissions

Earth-to-space transmissions

2 Data concerning the GSO FSS network

Receive earth station sensitivity

Satellite receive sensitivity

3 Calculation of downlink interference into the GSO FSS network

4 Calculation of uplink interference into the GSO FSS network

5 Multiple non-GSO FSS systems

Step D2m:

Step U3m:

Annex 3 Example of the application of the methodology in the Annex 1 to
this Recommendation to the calculation of the worst-case interference levels
from a non-GSO FSS system operating in geosynchronous elliptical orbits into GSO FSS networks in the 19/29 GHz
frequency bands

1 Non-GSO system under consideration

2 Frequency bands

3 Key parameters for calculation of interference into GSO FSS networks in
the 19/29 GHz
frequency bands

Downlink interference into GSO FSS
networks

Uplink interference into GSO FSS
networks

4 Calculation of downlink interference to the GSO networks

5 Calculation of uplink interference to the GSO networks

Annex 4 Example of the application of the methodology in Annex 2 to this
Recommendation to the calculation of the worst-case interference levels from a non-GSO FSS system operating
in geosynchronous elliptical orbits
into GSO FSS networks in the
18/28 GHz frequency bands

1 Candidate non-GSO system under consideration

2 Frequency bands

3 Key parameters for calculation of interference to GSO FSS networks in the 18/28 GHz frequency bands

Downlink interference into GSO
networks

Uplink interference into GSO
networks

4 Calculation of downlink interference to the GSO networks

5 Calculation of uplink interference to a GSO FSS network

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