A Seven-Parameter BRDF Model with Double-Peak Characteristic Suitable for Sandy Soil

Table 1

Model parameters and error for Figure 6.

		k1	a		k2	b		error
15°	-0.338	-0.2134	0.1805	0.0877	1.3467	1.2096	0.3479	0.30%
30°	0.0665	11.4655	0.6374	0.0289	21.3965	1.0363	0.0350	0.22%
45°	0.0688	47.9851	0.8908	0.0320	8.3861	1.6253	0.0402	0.26%
60°	0.1177	23.5580	0.6940	0.1047	18.8908	0.6322	0.0642	0.25%