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A9.3 A9.3

It is often recommended that FS characteristics are to be found in the Rec.  ITU-R F.758-4 when FS frequency sharing with aircraft-mounted FSS Earth stations in the band 27.5-29.5 GHz is considered. Note that Rec.  ITU-R F.758-4 has also been newly revised; the draft revision is currently in the final stage of being approved and publication of new version F.758-5 is expected soon. As specified in Annex 2 of its Section 4, the system parameters shown are not representative of any actual FS system, but represent an averaging or an expected range of values suitable for generic sharing/compatibility studies.

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Antenna radiation patterns for FS-PP are usually assumed in sharing studies using the formulas in ITU-R F.699 (when a single FS system is considered as victim/interferer) or F.1245 (when averaging among a number of FS systems as victim/interferer). For P-MP it is recommended to use the ITU-R F.1336.

 

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T069 T069

Table 69: Recommended FS characteristics for FS vs FSS studies

Table 70: Recommended FS characteristics for FS vs FSS studies

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