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Stations FS5 and FS6 in the Table 70 Error! Reference source not found.below have parameters in line with the Rec. ITU-R F.758 [22]. . FS1 and FS3 stations are representative of typically deployed PP FS stations. FS2 is representative of a longer than typical link operating mountainous terrain and hence an elevation angle of 5 degrees is appropriate[A1] , . FS4 is representative of a P-MP Hub station. P-MP subscriber stations are expected to have parameters similar to those valid for PP stations.
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[A1]But no justificiation for FS3 which has a higher elevation angle of 10 degrees?
Table 7071: Recommended FS characteristics for FS vs FSS studiesAnchor T070T071T070 T071
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The Spectrum Mask for P-P and P-MP can be found in ETSI EN 302 217-2-2 [26] Annex A (table A4) and EN 302 326-2 (Section 5.3.4.1) respectively. Blocking information is available from EN 301 390 (Section 7).
With respect to antenna height for P-P, the BS and TS minimum antenna height are 20 m and for P-MP, the BS minimum antenna height is 20 m and the TS minimum antenna height is 1.5 m.
For the antenna elevation, some countries have reported an elevation range of 3 to 10 degrees. In rare cases a range of maximum elevation angle from 15 to 30 degrees has been reported.
ECC Report 100 uses an I/N ≤ -10 dB; I/N ≤ -6 dB is mentioned only for the protection of ENG/OB. FS systems (P-P and P-MP) commonly adopt I/N ≤ -10 dB in line with Rec. ITU-R F.758 [22]
[1] The System noise power density shall be obtained from the following equation:
N0 (dBW/Hz)= F(dB) + 10*log10(kT0)
Where where : T0 = 290 K, F is the noise figure and k is the Boltzmann constant it results. This is equivalent to:
N0 (dBW/Hz) = F(dB) - 204 (dBW/Hz) or N0(dBm/MHz) = F(dB) - 114 (dBm/MHz)
[2] The difference between the peak gain values of stations FS1 and FS2 comes from the fact that a typical PP FS station with high elevation angle (10°) is usually employed for short-range links near hilly areas.