Research Article
Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform
Table 4
Estimation results as a function of range velocity varying from 1 m/s to 10 m/s at
= 4 m/s and
ay0 = 0.1 m/s
2.
| | Azimuth velocity estimation in this paper (m/s) = 4 m/s | Percent error (%) | Azimuth velocity estimation based on [16] (m/s) = 4 m/s | Percent error (%) | Range velocity estimation (m/s) = 4 m/s | Percent error (%) | Range acceleration (m/s2) | Range acceleration estimation (m/s2) | Percent error (%) |
| | 3.8795 | 3.0 | 3.6064 | 9.8 | 3.9888 | 0.3 | 0.01 | 0.0073 | 27.0 | | 3.9533 | 1.2 | 3.3760 | 15.6 | 3.9957 | 0.1 | 0.02 | 0.0221 | 10.5 | | 3.9400 | 1.5 | 3.1467 | 21.3 | 3.9945 | 0.1 | 0.03 | 0.0313 | 4.3 | | 4.0001 | 0.0 | 2.9185 | 27.0 | 4.0000 | 0.0 | 0.04 | 0.0452 | 13.0 | | 4.0044 | 0.1 | 2.6914 | 32.7 | 4.0004 | 0.0 | 0.05 | 0.0555 | 11.0 | | 4.0620 | 0.2 | 2.4653 | 38.4 | 4.0055 | 0.1 | 0.06 | 0.0693 | 15.5 | | 4.0076 | 0.2 | 2.2404 | 44.0 | 4.0007 | 0.0 | 0.07 | 0.0757 | 8.1 | | 4.0617 | 0.2 | 2.0165 | 49.6 | 4.0054 | 0.1 | 0.08 | 0.0893 | 11.6 | | 4.0138 | 0.3 | 1.7937 | 55.2 | 4.0012 | 0.0 | 0.09 | 0.0961 | 6.8 | | 4.1179 | 0.3 | 1.5718 | 60.7 | 4.0101 | 0.3 | 0.10 | 0.1130 | 13.0 |
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