Fig.1

SAR motion projection model on XOZ plane"

Fig.2

SAR linear motion projection model"

Fig.3

Schematic diagram of SAR coordinate system transformation"

Table 1

Simulation parameters of medium Earth orbit SAR imaging"

Fig.4

Angles of view variation during the synthetic aperture time of high and medium Earth orbit SAR"

Fig.5

Simulation results of imaging within the high and medium Earth orbit SAR under view variation"

Fig.6

Flowchart of SAR image matching method combining Blob algorithm and NCC operator"

Fig.7

Schematic diagram of ship structure"

Fig.8

Schematic diagram of structural semantic features of ship SAR images"

Fig.9

Flowchart of ship target semantic structure information extraction and analysis"

Fig.10

Schematic diagram of multi-view SAR imaging trajectory"

Table 2

SAR parameters"

Fig.11

Ideal scattering point ship model"

Fig.12

Multi-view SAR imaging results of ship target at ideal scattering point"

Fig.13

Matching results of two image matching algorithms"

Table 3

Three-dimensional coordinate estimation errors combining Blob algorithm and SIFT feature description operator"

Table 4

Three-dimensional coordinate estimation error combining Blob algorithm and NCC operator"

Fig.14

Three dimensional reconstruction results of ship target with ideal scattering point by different algorithms"

Table 5

Estimation error of three-dimensional coordinates by different algorithms m"

Fig.15

Multi-view RCS model and SAR imaging results for ship targets"

Fig.16

Results of imaging of view 1 and sea clutter removal"

Fig.17

Results of feature extraction from SAR images of ships under the influence of sea clutter of view 1"

Table 6

Ship structure information solving results under sea clutter interference"

Fig.18

Three-dimensional reconstruction results of different algorithms for ship targets （vertical view）"

Fig.19

Three-dimensional reconstruction results of different algorithms for ship targets （front view）"