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