Parameters for the calculation of radar sensitivity to interferencesa.
|G||Maximum antenna gain||27 dBi|
|PT||Pointing in elevation||~6–8°|
|BW||Beam width||10° at 3 dB|
|S min||Minimum detectable signal at antenna output||−103 dBm|
|CL||Cable loss||2 dB|
|RBW||Typical receiver bandwidth||5.5 MHz|
|S/I||Signal to interference ratio||12 dB|
|MG||Aeronautical safety margin and multiple technology allowance||12 dB|
We follow here the methodology by Frequentis (2007), where a conservative interference threshold at receiver input is calculated as: S min + G − CL − (S/I) − MG, which amounts to −102 dBm.
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