BDS satellite clock offset prediction based on a semiparametric adjustment model considering model errors

Satellite Navigation

Table 1 Accuracy statistics of satellite clock offset prediction (Unit:\( ns \))

Scheme category	Forecast model	C01 (GEO)		C06 (IGSO)		C12 (MEO)
Scheme category	Forecast model	Fitting accuracy	Forecast accuracy	Fitting accuracy	Forecast accuracy	Fitting accuracy	Forecast accuracy
Scheme 1	QP	0.292	6.301	1.324	37.034	0.242	1.653
Scheme 2	QP-T1_(orb)	0.188	10.756	0.980	14.274	0.194	1.833
Scheme 3	QP-T1	0.229	6.061	0.980	14.144	0.194	1.830
Scheme 4	QP-T2	0.186	10.104	0.792	3.493	0.170	1.732
Scheme 5	QP-T3	0.164	13.119	0.323	38.799	0.129	6.789

QP represents the basic prediction model; QP-T1_(orb) represents the periodic term model after adding orbit period only; QP-Ti (i = 1,2,3) represents the periodic term model after adding the correction of the first i main period term in turn