Table 8: Rank of the five best mapping functions for Egypt, based on corresponding mean differences, rms and percent error with respect to those computed using the ray trace model.

a) 30˚ elevation angle 15˚ elevation angle
MF Mean difference rms Percent error rank MF Mean difference rms Percent error rank
SA 22.19 6.48 8.24 1 CH 43.49 12.69 8.39 1
MO 22.45 6.56 8.34 2 MO 43.56 12.71 8.40 2
CH 22.47 6.56 8.35 3 IF 44.95 13.12 8.67 3
IF 22.59 6.60 8.39 4 HE 44.95 13.12 8.67 4
HE 22.60 6.60 8.40 5 UNB 45.07 13.15 8.70 5
b) 10˚ elevation angle 9˚ elevation angle
MF Mean difference rms Percent error rank MF Mean difference rms Percent error rank
SA 57.64 16.83 7.50 1 SA 62.20 18.16 7.31 1
CH 64.93 18.93 8.45 2 CH 72.09 21.01 8.46 2
MO 65.38 19.06 8.51 3 MO 72.80 21.22 8.55 3
IF 69.94 20.39 9.10 4 IF 78.93 23.00 9.27 4
HE 70.00 20.42 9.11 5 HE 79.03 23.05 9.28 5
c) 7˚ elevation angle 5˚ elevation angle
MF Mean difference rms Percent error rank MF Mean difference rms Percent error rank
SA 72.18 21.08 6.65 1 SA 76.52 22.47 5.13 1
CH 92.51 26.94 8.52 2 CH 128.85 37.44 8.63 2
MO 94.49 27.50 8.71 3 MO 136.01 39.51 9.11 3
IF 106.57 31.04 9.82 4 HE 165.22 48.13 10.97 4
HE 106.92 31.06 9.85 5 IF 163.81 47.67 11.07 5

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