Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform

Table 3

Estimation results as a function of azimuth velocity varying from 1 m/s to 14 m/s at  = 4 m/s and a_y0 = 0.1 m/s².

Azimuth velocity (m/s)	Estimation in this paper (m/s)	Percent error (%)	Estimation based on [16] (m/s)	Percent error (%)	Range velocity estimation (m/s)  = 4 m/s	Percent error (%)	Range acceleration estimation (m/s^2) ay0 = 0.1 m/s^2	Percent error (%)
1	1.2249	22.5	−1.2683	228.6	4.0171	0.4	0.1219	21.9
2	2.3342	16.7	−0.3318	116.6	3.9474	1.3	0.1365	36.5
3	3.3023	10.1	0.6210	79.3	4.1068	2.7	0.1328	32.8
4	4.1179	3.0	1.5718	60.7	4.0101	0.3	0.1130	13.0
5	5.1585	3.2	2.5207	50.0	4.0141	0.4	0.1151	15.1
6	6.1167	2.0	3.4673	42.2	4.0108	0.3	0.1118	11.8
7	7.0700	1.0	4.4118	37.0	4.0067	0.2	0.1083	8.3
8	8.1583	2.0	5.3538	33.1	4.0159	0.4	0.1133	13.3
9	9.1473	1.7	6.2932	30.1	4.0154	0.4	0.1120	12.0
10	10.1431	1.4	7.2298	27.7	4.0156	0.4	0.1112	11.2
11	11.1591	1.5	8.1636	25.8	4.0182	0.5	0.1116	11.6
12	12.1664	1.4	9.0942	24.2	4.0199	0.5	0.1114	11.4
13	13.1723	1.3	10.0214	22.9	4.0216	0.5	0.1112	11.2
14	14.1762	1.3	10.9451	21.8	4.0231	0.6	0.1108	10.8
15	15.2149	1.4	11.8649	20.9	4.0296	0.7	0.1124	12.4