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

Satellite Navigation

Table 2 Accuracy of clock offset prediction for Semi-K (Unit:\( ns \))

PRN	Fitting accuracy			Forecast accuracy/24 h			Forecast accuracy/12 h			Forecast accuracy/6 h
PRN	QP	QP-T1	Semi-K	QP	QP-T1	Semi-K	QP	QP-T1	Semi-K	QP	QP-T1	Semi-K
C01	0.292	0.229	0.055	16.564	16.018	15.071	6.301	6.061	5.654	2.001	1.837	1.595
C02	0.380	0.192	0.092	6.271	5.849	3.887	5.210	4.008	3.766	4.055	1.234	3.137
C03	0.390	0.132	0.043	4.169	4.809	0.470	3.138	2.449	0.439	2.696	1.658	0.447
C04	0.750	0.261	0.241	13.879	10.674	9.836	6.353	6.571	6.350	3.088	4.719	4.688
C05	0.570	0.346	0.105	12.169	6.414	0.769	6.694	3.457	0.219	4.150	1.328	0.220
C06	1.324	0.980	0.089	77.767	31.410	7.444	37.034	14.144	1.412	18.952	8.599	1.830
C07	0.600	0.193	0.078	14.099	2.555	0.597	5.497	1.831	0.346	1.731	1.188	0.467
C08	0.390	0.323	0.246	16.025	5.312	2.796	6.707	1.296	1.151	4.429	1.642	1.550
C09	0.180	0.148	0.046	8.735	7.277	5.421	4.740	3.737	2.981	2.587	1.889	1.659
C10	0.670	0.249	0.248	8.271	2.949	2.940	2.120	0.802	0.790	0.467	0.766	0.767
C11	0.310	0.284	0.280	0.689	0.521	0.503	0.634	0.667	0.573	0.825	0.872	0.736
C12	0.242	0.278	0.055	1.543	0.690	5.418	1.653	0.544	0.415	1.639	0.675	0.363
C14	0.160	0.148	0.051	2.156	2.165	0.517	1.206	1.227	0.386	0.720	0.831	0.350

QP represents the basic prediction model; QP-T1 represents the periodic term model after adding the correction of the first main period term; Semi-K represents the semiparametric adjustment model considering model errors