Fig.1

Space observation geometry of ground-based radar"

Fig.2

ISAR imaging vector diagram of space target"

Fig.3

Observation scenario of multi-target netted radar"

Fig.4

Diagram of data organization structure for ISAR imaging resource scheduling"

Fig.5

Orbital imaging resource allocation method based on auction theory"

Table 1

Radar parameters (°)"

Table 2

TLE information of four space-based target"

Fig.6

Scattering point model of space targets"

Fig.7

Simulation diagram of multi-target observation"

Table 3

Six orbital elements of two space-based targets"

Fig.8

Equivalent angular velocity of different targets at the same station"

Fig.9

Equivalent angular velocity of the same target at different radar stations"

Fig.10

ISAR imaging comparison at different imaging time"

Fig.11

ISAR imaging comparison after azimuth dimension interception"

Table 4

Six orbital elements of four space-based target"

Fig.12

Equivalent rotation velocity of multiple radars to Sate 1"

Fig.13

Equivalent rotation velocity of multiple radars to Sate 2"

Fig.14

Equivalent rotation velocity of multiple radars to Sate 3"

Fig.15

Equivalent rotation velocity of multiple radars to Sate 4"

Table 5

Information of Sate 1 in different radar observation intervals"

Table 6

Information of Sate 2 in different radar observation intervals"

Table 7

Information of Sate 3 in different radar observation intervals"

Table 8

Information of Sate 4 in different radar observation intervals"

Fig.16

Observation scheme of conventional imaging averaging resource"

Fig.17

Resource allocation observation scheme proposed in this paper"

Table 9

Observation indicators of multi-base and multi-object"

Fig.18

Imaging result diagram of resource allocation observation scheme proposed in this paper"

Fig.19

Imaging results of Changsha station"

Table 10

Comparison of imaging result indicators"