Fig.1

Geometric relationship diagram of ship translational motion and radar"

Fig.2

Effect of primary phase error on mached filtering"

Fig.3

Effect of quadratic phase error on mached filtering"

Fig.4

Diagram of ship heave motion model"

Fig.5

Geometric relationship diagram of ship heave motion and radar"

Fig.6

Effect of cubic phase error on mached filtering"

Fig.7

Effect of quartic phase error on mached filtering"

Fig.8

Effect of sinusoidal phase error on mached filtering"

Fig.9

Schematic of ship's three-dimensional swing"

Fig.10

Geometric relationship diagram of ship's three-dimensional swing"

Table 1

Simulation parameters of radar system"

Fig.11

System operation flow chart"

Fig.12

SAR imaging simulator for complex moving ship targets"

Table 2

Translational parameters of point targets"

Fig.13

Distance curve diagram between translational ship and radar"

Fig.14

Simulation diagram of translational point target"

Fig.15

Simulation diagram of ship translational along range direction"

Fig.16

Simulation diagram of ship with different azimuth velocity"

Fig.17

Simulation diagram of heterogeneous moving line target"

Table 3

Motion speed of different targets m/s"

Fig.18

Curve diagram of range between heave moving point target and radar"

Fig.19

Doppler frequency diagram of echo for heave moving point target echo"

Fig.20

Simulation diagram of heave moving point target with different synthetic aperture time"

Fig.21

Simulation diagram of heave moving ship surface target with different synthetic aperture time"

Table 4

Three-dimensional swing parameters of point targets"

Table 5

Synthetic aperture time corresponding to radar platform velocity"

Fig.22

Point target motion trajectory diagram of yaw motion"

Fig.23

Distance curve of yaw motion"

Fig.24

Doppler frequency of yaw motion"

Fig.25

Simulation diagram of yaw motion point targets with different synthetic aperture time"

Fig.26

Roll motion trajectory"

Fig.27

Distance curve of roll motion"

Fig.28

Doppler frequency of roll motion"

Fig.29

Simulation diagram of roll motion point targets with different synthetic aperture time"

Fig.30

Pitch motion trajectory"

Fig.31

Distance curve of pitch motion"

Fig.32

Doppler frequency of pitch motion"

Fig.33

Simulation diagram of pitch motion point targets with different synthetic aperture time"

Fig.34

Simulation results of three-dimensional swing of ship line target"

Fig.35

Imaging results of ship surface target in yaw motion at initial phase is 0.5π"

Fig.36

Imaging results of ship surface target in roll motion at initial phase is 0.5π"

Fig.37

Imaging results of ship surface target in pitch motion at initial phase is 0.5π"

Fig.38

Imaging results of ship surface target in yaw motion at initial phase is 0π"

Fig.39

Imaging results of ship surface target in roll motion at initial phase is 0π"

Fig.40

Imaging results of ship surface target in pitch motion at initial phase is 0π"

Fig.41

Focusing effect of Gaofen-3 SAR ship image"

Fig.42

Focusing effect of complex motion ships with long synthetic aperture time"