Estimation of Summer Air Temperature over China Using Himawari-8 AHI and Numerical Weather Prediction Data

Table 3

Pearson’s correlation matrix of variables considered for the T_air estimation model.

	Tair	BT11μm	BT12μm	VZA	LAT	LON	JD	HOUR	PWV	SP	RH	EL	NDVI	DTC
Tair	1	0.75	0.69	−0.45	−0.22	0.29	0.17	−0.1	0.57	0.66	−0.19	−0.67	0.11	−0.38
BT11μm	0.75	1	0.98	−0.25	0.08	0.34	0.06	−0.17	0.17	0.53	−0.38	−0.54	−0.07	−0.30
BT12μm	0.69	0.98	1	−0.23	0.12	0.36	0.04	−0.15	0.1	0.51	−0.38	−0.52	−0.09	−0.29
VZA	−0.45	−0.25	−0.23	1	0.66	−0.62	−0.10	0.01	−0.74	−0.57	−0.5	0.56	−0.4	0.63
LAT	−0.22	0.08	0.12	0.66	1	0.15	−0.08	0.03	−0.64	−0.02	−0.49	0.01	−0.32	0.19
LON	0.29	0.34	0.36	−0.62	0.15	1	0.03	0.01	0.30	0.68	0.21	−0.67	0.23	−0.63
JD	0.17	0.06	0.04	−0.1	−0.08	0.03	1	−0.05	0.29	0.06	0.19	−0.06	0.22	−0.03
HOUR	−0.10	−0.17	−0.15	0.01	0.03	0.01	−0.05	1	0.01	0.01	0.17	−0.01	0.00	0.01
PWV	0.57	0.17	0.10	−0.74	−0.64	0.3	0.29	0.01	1	0.59	0.56	−0.58	0.44	−0.46
SP	0.66	0.53	0.51	−0.57	−0.02	0.68	0.06	0.01	0.59	1	0.15	−0.99	0.23	−0.68
RH	−0.19	−0.38	−0.38	−0.5	−0.49	0.21	0.19	0.17	0.56	0.15	1	−0.13	0.47	−0.26
EL	−0.67	−0.54	−0.52	0.56	0.01	−0.67	−0.06	−0.01	−0.58	−0.99	−0.13	1	−0.22	0.66
NDVI	0.11	−0.07	−0.09	−0.40	−0.32	0.23	0.22	0.00	0.44	0.23	0.47	−0.22	1	−0.18
DTC	−0.38	−0.3	−0.29	0.63	0.19	−0.63	−0.03	0.01	−0.46	−0.68	−0.26	0.66	−0.18	1