Intercomparison of Downscaling Techniques for Satellite Soil Moisture Products

Table 7

Comparison between in situ and downscaled (1 km) ASCAT SM_SVR.

	In situ SM		ASCAT SM (1 km)_SVR		y = ax + b (x: in situ SM, y: downscaled SM)	R	Bias (m^3·m^−3)	RMSE (m^3·m^−3)	IOA
	Average (m^3·m^−3)	SD (m^3·m^−3)	Average (m^3·m^−3)	SD (m^3·m^−3)
Gokseong	0.16	0.03	0.25	0.04	y = 0.70x + 13.32	0.50	−0.08	0.09	0.37
Geumsan	0.26	0.02	0.25	0.03	y = 0.85x + 2.74	0.61	0.01	0.03	0.74
Yeongdong	0.22	0.04	0.28	0.04	y = 0.73x + 12.07	0.71	−0.06	0.07	0.58
Imsil	0.26	0.04	0.25	0.04	y = 0.69x + 7.74	0.73	0.00	0.03	0.85
Jeongeup	0.29	0.04	0.22	0.06	y = 1.16x − 11.75	0.77	0.07	0.08	0.59
Jeonju	0.24	0.07	0.23	0.06	y = 0.57x + 9.46	0.70	0.00	0.06	0.72
Wanju	0.17	0.03	0.25	0.04	y = 1.16x + 4.76	0.87	−0.08	0.08	0.52
Sunchang	0.23	0.06	0.37	0.06	y = 0.80x + 10.50	0.80	−0.04	0.05	0.79
Hapcheon	0.21	0.09	0.25	0.06	y = 0.55x + 12.35	0.44	−0.11	0.17	0.22
Average	0.23	0.04	0.26	0.05		0.68	−0.03	0.07	0.60

The significance level of the value > 0.05; the significance level of the value > 0.01.