Duty (%) 30 30 30 Range compression ratio 60 000 60 000 60 000 Antenna type Planar Planar array Planar array Antenna peak gain (dBi) 47.0 47.0 47.0 e.i.r.p. (dBW) 85.5 85.5 85.5 Antenna orientation from Nadir 18.5° to 49.3° 18.5° to 49.3° 18.5° to 49.3° Antenna beamwidth 1.13° (El) 1.13° (El) 1.13° (El) 0.53° (Az) 0.53° (Az) 0.53° (Az) TABLE 3 (end) Parameter SAR-4/700 SAR-4/900 SAR-4/1100 Antenna polarization Linear Linear Linear horizontal/vertical horizontal/vertical horizontal/vertical System noise temperature (K) 500 500 500 * Final value depends on the decision eventually taken under WRC-15 agenda item 1.12 3.2 Comparison of interference conditions under peak I/N The peak interference signal power level received by terrestrial radar from a spaceborne SAR is calculated with equations 1, 4a and 4b given in . where: peak spaceborne sensor transmitter (W) Pt: spaceborne sensor antenna gain towards terrestrial radar (dB) Gt: terrestrial radar antenna gain towards spaceborne sensor (dBi) Gr: frequency (MHz) F: range between sensor and radar (km) R: receiver on-tune rejection (dB) OTR: gain (dB), rejection of unwanted signals due to radar receiver signal processing (assumed to be zero if not known) receiver inherent noise level (dBW). N: = dBW + 10 log (Br) + N NF –204 where: receiver IF bandwidth (Hz) Br: noise figure (dB). The on-tune rejection term is calculated as: 0 for / (Br2 1 OTR Bc T) 10 · log (Br2 /Bc) for / (Br2 1 OTR T Bc T)
Duty (%) 30 30 30 Range compression ratio 60 000 60 000 60 000 Antenna type Planar Planar array Planar array Antenna peak gain (dBi) 47.0 47.0 47.0 e.i.r.p. (dBW) 85.5 85.5 85.5 Antenna orientation from Nadir 18.5° to 49.3° 18.5° to 49.3° 18.5° to 49.3° Antenna beamwidth 1.13° (El) 0.53° (Az) 1.13° (El) 0.53° (Az) 1.13° (El) 0.53° (Az) TABLE 3 (end) Parameter SAR-4/700 SAR-4/900 SAR-4/1100 Antenna polarization Linear horizontal/vertical Linear horizontal/vertical Linear horizontal/vertical System noise temperature (K) 500 500 500 * Final value depends on the decision eventually taken under WRC-15 agenda item 1.12 3.2 Comparison of interference conditions under peak I/N The peak interference signal power level received by terrestrial radar from a spaceborne SAR is calculated with equations 1, 4a and 4b given in . where: Pt: peak spaceborne sensor transmitter (W) Gt: spaceborne sensor antenna gain towards terrestrial radar (dB) Gr: terrestrial radar antenna gain towards spaceborne sensor (dBi) F: frequency (MHz) R: range between sensor and radar (km) OTR: receiver on-tune rejection (dB) gain (dB), rejection of unwanted signals due to radar receiver signal processing (assumed to be zero if not known) N: receiver inherent noise level (dBW). N = –204 dBW + 10 log (Br) + NF where: Br: receiver IF bandwidth (Hz) noise figure (dB). The on-tune rejection term is calculated as: OTR 0 for Bc / (Br2 T) 1 OTR 10 · log (Br2 T /Bc) for Bc / (Br2 T) 1
R-REP-RS.2313-2014-MSW-E.docx