Fig.1

FSR network' s structure"

Fig.2

Schematic diagram of flat' s target crossing of baseline"

Fig.3

Flat target' s forward RCS"

Table 1

Simulation parameters of forward scattering detectable area"

Fig.4

Target' s RCS (20 m×13 m)"

Fig.5

Signal-to-noise ratio of scattering signal (T=20 ms)"

Fig.6

Forward scattering detection area (only the first peak of RCS is considered)"

Fig.7

Forward scattering detection area under different receiving antenna gain (considering all areas of RCS)"

Fig.8

Target crossing forward scattering area in three dimensional space"

Fig.9

Time domain waveform diagram of target near and far away from the baseline"

Table 2

Forward scattering echo simulation parameters"

Table 3

Time domain eigenvalue"

Table 4

Comparison of time domain characteristics"

Fig.10

Time domain characteristic difference with different SNR (zP=100 m)"

Fig.11

Time frequency diagram when the target crosses and is far away from the baseline"

Fig.12

Spectrum diagram of target crosses and is far away from baseline"

Table 5

Frequency domain eigenvalue"

Table 6

Comparison of frequency domain eigenvalue"

Table 7

Forward scattering echo simulation parameters"

Fig.13

Analysis of influence of target crossing location"

Fig.14

Analysis of influence of target velocity"

Fig.15

Analysis of influence of target motion direction"

Fig.16

Analysis of influence of target' s imprecise crossing"

Table 8

Comparison of time-frequency domain eigenvalues"