Intercomparison of Downscaling Techniques for Satellite Soil Moisture Products

Table 4

Correlation analysis between the independent variables and residual magnitude.

Residual magnitude	Polynomial						SVR
	NDVI						NDVI
	Slope	R	value	Slope	R	value	Slope	R	value	Slope	R	value
Average	17.35	0.32	0.10	−19.21	0.41	0.05	0.84	0.10	0.41	4.47	0.17	0.24
SD	16.52	0.19	0.21	17.68	0.19	0.14	6.75	0.08	0.30	7.93	0.11	0.31