Table 1.

RMSE comparison of the different materials using the one-port and two-port inversion methods.

Material	One-Port RMSE	Two-Port RMSE
TX100	0.3982	0.4363
Ethanol	0.3378	0.3344
Methanol	0.4472	0.3896
PTFE	0.189	0.105
CST sand soil (dry)	0.2831	N/A
CST Loamy soil (wet)	0.2831	N/A
Bajjad soil (dry)	0.5	0.4258
Bajjad hydrated	0.3	0.6493