Simulasi interferensi dari 2 drone (unmanned aircraft system) terhadap fixed service pada frekuensi 12,5 - 12,75 GHz dengan memperhitungkan faktor redaman hujan = The analysis of interference from 2 drones to fixed service at frequency band 12,5-12,75 GHz by considering the factor of rain attenuation / Muhamad Suharso Nugroho