Inversion Algorithm for Micro-Motion Parameters of a Cooperative Target Based on Time-Frequency Feature of Dynamic Speckle

Fig. 1. Structure of retroreflector array and optical geometry of detecting system. (a) Structure of retroreflector array; (b) optical geometry of detecting system

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Fig. 2. Intensity time sequence of speckle field of a rotating retroreflector

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Fig. 3. Time-frequency feature of dynamic speckle of coaxial rotating array

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Fig. 4. Spectral correlation function of dynamic speckle of coaxial rotating array

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Fig. 5. Spectral integrated intensity of dynamic speckle of the coaxial rotating array

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Fig. 6. Time-frequency feature of dynamic speckle of non-coaxial rotating array

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Fig. 7. Spectral correlation function of dynamic speckle of non-coaxial rotating array

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Fig. 8. Amplitude-phase distribution of time-frequency spectral lines of dynamic speckle of non-coaxial rotating array

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Fig. 9. Time-frequency feature of dynamic speckle of the array with compound movement

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Fig. 10. Spectral correlation function of dynamic speckle of the array with compound movement

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Fig. 11. Amplitude-phase distribution of time-frequency spectral lines of the array with compound movement

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Table 1. Amplitude of each spectral lines and corresponding line-of-sight angles
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Table 1. Amplitude of each spectral lines and corresponding line-of-sight angles
g r_g /cm F_g /kHz θ /(°) Δθ /(°)
1 4.22 10.83 4.99 -0.01
2 5.51 14.06 4.96 -0.04
3 7.79 19.92 4.97 -0.03
4 10.18 26.07 4.98 -0.02
5 11.02 28.32 4.99 -0.01

Table 2. Extracted amplitude of time-frequency spectral lines of non-coaxial rotating array
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Table 2. Extracted amplitude of time-frequency spectral lines of non-coaxial rotating array
g f' /kHz
1 10.27
2 10.34
3 10.74
4 10.80
5 11.59
6 14.12
7 14.48
8 14.94
9 15.10
10 15.13
11 18.83
12 19.47
13 20.07
14 24.88
15 24.90
16 26.00
17 26.01
18 26.70
19 27.49
20 27.54
21 28.41

Table 3. Amplitude of time-frequency spectral lines of the array with compound movement and corresponding inverted line-of-sight angle
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Table 3. Amplitude of time-frequency spectral lines of the array with compound movement and corresponding inverted line-of-sight angle
g F_g /kHz θ₀ /(°)
1 10.87 5.00
2 14.24 5.02
3 20.08 5.01
4 26.27 5.01
5 28.43 5.01

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Liguo Wang, Yaqing Li, Lei Gong, Qian Wang. Inversion Algorithm for Micro-Motion Parameters of a Cooperative Target Based on Time-Frequency Feature of Dynamic Speckle[J]. Acta Optica Sinica, 2021, 41(2): 0228001

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Paper Information

Category: Remote Sensing and Sensors

Received: Jul. 6, 2020

Accepted: Aug. 19, 2020

Published Online: Feb. 27, 2021

The Author Email: Wang Liguo (kinglywang3773@163.com)

DOI:10.3788/AOS202141.0228001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Amplitude of each spectral lines and corresponding line-of-sight angles

Table 1. Amplitude of each spectral lines and corresponding line-of-sight angles

Table 2. Extracted amplitude of time-frequency spectral lines of non-coaxial rotating array

Table 2. Extracted amplitude of time-frequency spectral lines of non-coaxial rotating array

Table 3. Amplitude of time-frequency spectral lines of the array with compound movement and corresponding inverted line-of-sight angle

Table 3. Amplitude of time-frequency spectral lines of the array with compound movement and corresponding inverted line-of-sight angle