Research Article
Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform
Table 5
Estimation results as a function of range acceleration varying from 0.01 m/s
2 to 0.1 m/s
2 at
= 4 m/s and
= 4 m/s.
| | Azimuth velocity estimation in this paper (m/s) = 4 m/s | Percent error (%) | Azimuth velocity estimation based on [15] (m/s) = 4 m/s | Percent error (%) | Range velocity (m/s) | Range velocity estimation (m/s) | Percent error (%) | Range acceleration estimation (m/s2) ay0 = 0.1 m/s2 | Percent error (%) |
| | 3.9711 | 0.7 | 1.7165 | 57.1 | 1 | 0.9994 | 0.1 | 0.0968 | 3.2 | | 4.0935 | 2.3 | 1.6876 | 57.8 | 2 | 2.0040 | 0.2 | 0.1061 | 6.1 | | 4.1339 | 3.4 | 1.6393 | 59.0 | 3 | 3.0086 | 0.3 | 0.1110 | 11.0 | | 4.1179 | 3.0 | 1.5718 | 60.8 | 4 | 4.0101 | 0.3 | 0.1130 | 13.0 | | 4.2857 | 7.1 | 1.4852 | 62.9 | 5 | 5.0303 | 0.6 | 0.1279 | 27.9 | | 4.2421 | 6.1 | 1.3796 | 65.5 | 6 | 6.0307 | 0.5 | 0.1298 | 29.8 | | 4.2519 | 6.3 | 1.2550 | 68.6 | 7 | 7.0381 | 0.5 | 0.1328 | 32.8 | | 4.2815 | 7.0 | 1.1116 | 72.2 | 8 | 8.0471 | 0.6 | 0.1446 | 44.6 | | 4.2567 | 6.4 | 0.9497 | 76.3 | 9 | 9.0480 | 0.5 | 0.1504 | 50.4 | | 4.2485 | 6.2 | 0.7693 | 80.8 | 10 | 10.0513 | 0.5 | 0.1581 | 58.1 |
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