Table 3: Comparisons between the predicted path loss and the measured path loss in far field for the grassland.

versus 1 m versus 1 m 3 cm versus 1 m 3 cm versus 2 m (m) 200 400 600 150 180 200 150 180 200 (dB) 90.99 108.41 113.74 113.04 112.83 114.92 108.46 109.81 112.21 (dB) 6.76 18.46 20.45 7.99 5.82 6.77 9.64 9.34 10.79 (dB) −3.44 2.14 0.55 2.00 −1.08 −0.64 2.51 1.14 1.98