Research Article
Rain Attenuation Study at Ku-Band over Earth-Space Path in South Korea
Table 2
Calculated error percentage [0.001% to 1%] for 12.25 GHz.
| Procedures | Matrices | Occurrence | ITU-R P.311-15 | 1 | 0.5 | 0.3 | 0.2 | 0.1 | 0.05 | 0.03 | 0.02 | 0.01 | 0.005 | 0.003 | 0.002 | 0.001 | | | |
| ITU-R P. 618-13 | ε(P) | -0.84 | -0.78 | -0.72 | -0.66 | -0.53 | -0.38 | -0.26 | -0.15 | 0.04 | 0.19 | 0.29 | 0.32 | 0.24 | | | | STD | 0.59 | 0.53 | 0.47 | 0.41 | 0.28 | 0.13 | 0.01 | 0.10 | 0.29 | 0.43 | 0.54 | 0.57 | 0.48 | -0.45 | 0.64 | 0.78 | RMS | 4.70 | 4.98 | 4.94 | 4.79 | 4.17 | 3.23 | 2.40 | 1.49 | 0.44 | 2.27 | 3.89 | 4.77 | 4.49 | | | |
| Unified | ε(P) | -0.94 | -0.88 | -0.84 | -0.79 | -0.67 | -0.51 | -0.42 | -0.34 | -0.21 | -0.15 | -0.11 | -0.14 | -0.23 | | | | STD | 0.46 | 0.40 | 0.36 | 0.31 | 0.19 | 0.03 | 0.06 | 0.14 | 0.27 | 0.33 | 0.37 | 0.34 | 0.25 | -0.02 | 0.63 | 0.63 | RMS | 5.27 | 5.66 | 5.78 | 5.76 | 5.27 | 4.39 | 3.86 | 3.35 | 2.28 | 1.86 | 1.47 | 2.11 | 4.45 | | | |
| DAH | ε(P) | -0.89 | -0.85 | -0.80 | -0.76 | -0.66 | -0.55 | -0.46 | -0.38 | -0.23 | -0.12 | -0.03 | 0.00 | -0.06 | | | | STD | 0.44 | 0.40 | 0.35 | 0.31 | 0.22 | 0.10 | 0.02 | 0.06 | 0.21 | 0.33 | 0.41 | 0.44 | 0.39 | -0.76 | 0.66 | 1.01 | RMS | 4.98 | 5.41 | 5.52 | 5.53 | 5.24 | 4.73 | 4.30 | 3.75 | 2.51 | 1.46 | 0.45 | 0.06 | 1.16 | | | |
| SAM | ε(P) | -0.99 | -0.95 | -0.91 | -0.86 | -0.70 | -0.45 | -0.27 | -0.12 | 0.17 | 0.36 | 0.49 | 0.47 | 0.38 | | | | STD | 0.73 | 0.69 | 0.65 | 0.60 | 0.44 | 0.19 | 0.01 | 0.14 | 0.43 | 0.62 | 0.75 | 0.73 | 0.64 | -0.87 | 1.35 | 1.61 | RMS | 5.53 | 6.09 | 6.28 | 6.27 | 5.54 | 3.88 | 2.49 | 1.14 | 1.82 | 4.37 | 6.57 | 6.91 | 7.20 | | | |
| Crane Global | ε(P) | -0.99 | -0.95 | -0.90 | -0.85 | -0.70 | -0.48 | -0.32 | -0.20 | 0.03 | 0.18 | 0.28 | 0.26 | 0.36 | | | | STD | 0.66 | 0.62 | 0.57 | 0.52 | 0.37 | 0.15 | 0.01 | 0.13 | 0.36 | 0.51 | 0.61 | 0.59 | 0.69 | -0.9 | 1.26 | 1.55 | RMS | 5.52 | 6.05 | 6.22 | 6.19 | 5.51 | 4.11 | 3.01 | 1.94 | 0.35 | 2.16 | 3.72 | 3.80 | 6.84 | | | |
| Ramachandran and Kumar | ε(P) | -0.79 | -0.71 | -0.63 | -0.55 | -0.37 | -0.12 | 0.13 | 0.42 | 0.48 | 0.45 | 0.43 | 0.36 | 0.13 | | | | STD | 0.73 | 0.65 | 0.57 | 0.49 | 0.31 | 0.06 | 0.19 | 0.47 | 0.54 | 0.51 | 0.49 | 0.42 | 0.19 | -0.21 | 0.62 | 0.65 | RMS | 4.43 | 4.56 | 4.34 | 4.01 | 2.90 | 1.00 | 1.25 | 4.07 | 5.09 | 5.48 | 5.69 | 5.28 | 2.48 | | | |
| Gracia Lopez | ε(P) | -0.99 | -0.95 | -0.91 | -0.87 | -0.74 | -0.55 | -0.44 | -0.35 | -0.21 | -0.16 | -0.13 | -0.17 | -0.28 | | | | STD | 0.47 | 0.43 | 0.39 | 0.35 | 0.22 | 0.03 | 0.08 | 0.17 | 0.31 | 0.36 | 0.39 | 0.35 | 0.24 | -1.16 | 1.16 | 1.64 | RMS | 5.53 | 6.10 | 6.31 | 6.34 | 5.81 | 4.74 | 4.05 | 3.44 | 2.30 | 1.98 | 1.78 | 2.56 | 5.36 | | | |
| Karasawa | ε(P) | -0.89 | -0.83 | -0.77 | -0.72 | -0.61 | -0.49 | -0.39 | -0.29 | -0.09 | 0.07 | 0.41 | 0.80 | 0.97 | | | | STD | 0.67 | 0.61 | 0.55 | 0.50 | 0.39 | 0.27 | 0.17 | 0.08 | 0.13 | 0.29 | 0.63 | 1.02 | 1.19 | -0.53 | 0.81 | 0.97 | RMS | 4.97 | 5.30 | 5.32 | 5.25 | 4.83 | 4.18 | 3.61 | 2.87 | 0.98 | 0.83 | 5.47 | 11.76 | 18.45 | | | |
| Proposed | ε(P) | -0.85 | -0.79 | -0.73 | -0.67 | -0.55 | -0.40 | -0.29 | -0.19 | 0.00 | 0.14 | 0.24 | 0.28 | 0.19 | | | | STD | 0.57 | 0.51 | 0.45 | 0.39 | 0.27 | 0.12 | 0.01 | 0.09 | 0.28 | 0.42 | 0.52 | 0.55 | 0.47 | -0.49 | 0.64 | 0.81 | RMS | 4.74 | 5.05 | 5.03 | 4.91 | 4.34 | 3.45 | 2.69 | 1.83 | 0.00 | 1.72 | 3.25 | 4.06 | 3.67 | | | |
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