This equation shows that by reducing the noise factor F (and, conversely, the noise figure NF), the radar detection range will be increased. Let us assume the system requires a SNR threshold of 20dB ...

Ben-hui Zhang, Jian-jun Hou, Long Huo, Ke-ming Yao, Nonlinear Evolution of Waves Based on Radar Wave Measurements and the mNLS Equation, Journal of Coastal Research, SPECIAL ISSUE NO.