Comprehensive Evaluation of GPM-IMERG, CMORPH, and TMPA Precipitation Products with Gauged Rainfall over Mainland China

Table 2

R, RB, RMSE, and RRMSE between different satellite-based products and gauge-based products for mean daily precipitation over eight subregions.

Index	Type	XJ	TP	XB	YG	DB	HB	CJ	HN
R	R-IMERG V05B	0.72	0.91	0.94	0.68	0.869	0.71	0.908	0.84
	R-IMERG V04A	0.55	0.75	0.92	0.57	0.87	0.33	0.91	0.85
	TRMM 3B42	0.69	0.95	0.95	0.7	0.86	−0.05	0.89	0.838
	CMORPH-CRT	0.28	0.88	0.89	0.29	0.8	0.19	0.84	0.58
RB (%)	R-IMERG V05B	5.2	2.78	8.71	4.15	15.56	10.57	6.92	0.69
	R-IMERG V04A	−21.8	−46	1.66	1.57	12.48	9.08	5.59	1.29
	TRMM 3B42	−7	5.39	4.92	1.68	10.68	4.57	2.96	1.56
	CMORPH-CRT	21.9	7.53	5.27	0.45	0.7	4.36	0.35	−6.62
RMSE (mm/day)	R-IMERG V05B	0.29	0.26	0.19	0.56	0.31	0.31	0.54	0.507
	R-IMERG V04A	0.37	0.74	0.18	0.64	0.268	0.28	0.5	0.506
	TRMM 3B42	0.3	0.21	0.16	0.54	0.273	0.25	0.53	0.52
	CMORPH-CRT	0.61	0.32	0.23	1.08	0.22	0.29	0.65	0.88
RRMSE (%)	R-IMERG V05B	54.91	18.98	17.94	17.76	19.16	15.72	13.2	9.65
	R-IMERG V04A	69.78	54.36	17.26	20.33	16.43	14.38	12.3	9.62
	TRMM 3B42	57.87	15.4	14.89	17	16.73	12.57	12.89	9.98
	CMORPH-CRT	116.7	23.24	21.33	34.1	13.71	14.41	16.04	16.71