Application of the Finite Difference Parabolic Equation Model in Forestry Remote Telemetry

Table 1

Fitting coefficients for the different moisture content.

Moisture content (%)	Effective permittivity		Polynomial fitting coefficients				MAE	MAPE (%)	R^2
	Ɛe(Min)	Ɛe(Max)	ω0	ω1	ω2	ω3
40	1.0029 + 2.18e − 5i	1.0147 + 10.96e − 5i	−0.4613	3.1338	0.1139	95.9517	0.3069	0.2768	0.9983
41	1.0030 + 3.58e − 5i	1.0150 + 18.01e − 5i	−0.4607	3.1136	3.8798	95.7436	0.3389	0.2783	0.9992
42	1.0031 + 5.07e − 5i	1.0153 + 25.53e − 5i	−0.1814	1.1724	11.8743	93.2278	0.1117	0.0842	1.0000
43	1.0031 + 6.66e − 5i	1.0156 + 33.51e − 5i	0.0769	−0.6622	19.9601	90.7919	0.1401	0.0970	1.0000