An Imaging Compensation Algorithm for Spaceborne High-Resolution SAR Based on a Continuous Tangent Motion Model
Abstract
:1. Introduction
2. Continuous Tangent Model and Two-Way Distance
2.1. Continuous Tangent Model
2.2. Two-Way Distance
3. Echo Expression of Spaceborne SAR Based on the Continuous Tangent Model
3.1. Time-Scaling Factor
3.2. Transmitting–Receiving Rate
3.3. Transmitting–Receiving Constant
4. Imaging Compensation Algorithm
5. Simulation and Validation
5.1. Simulation Method and Parameters
5.2. Simulation Results
5.3. Computational Load
6. Conclusions
Author Contributions
Conflicts of Interest
Appendix A
Appendix B
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Parameters | Value |
---|---|
Orbital inclination | 98.06° |
Orbital height | 680 km |
Eccentricity | 0.001 |
Elevation angle | 35 ° |
Squint angle | ±6.21 ° |
Beam rotation velocity | 0.42 °/s |
Bandwidth | 1.0 GHz |
Wavelength | 0.03 m |
Parameters | Value |
---|---|
Orbital inclination | 98.06° |
Orbital height | 680 km |
Eccentricity | 0.001 |
Elevation angle | 35° |
Wavelength | 0.03 m |
Beam width (Azimuth) | 0.305° |
Squint angle | ±6.21° |
Beam rotation velocity | 0.42°/s |
Signal bandwidth | 1.0 GHz |
Pulse width | 40 μs |
Pulse repetition frequency | 4000 Hz |
Motion Model | Target | Resolution (m) | PSLR (dB) | ISLR (dB) |
---|---|---|---|---|
Stop-go model | P1 | 0.1444 | −16.49 | −13.54 |
P2 | 0.1433 | −16.10 | −13.10 | |
P3 | 0.1444 | −15.42 | −12.51 | |
Continuous rectilinear model | P1 | 0.1342 | −13.25 | −9.96 |
P2 | 0.1342 | −13.26 | −9.96 | |
P3 | 0.1342 | −13.05 | −9.77 | |
Continuous tangent model | P1 | 0.1342 | −13.25 | −9.96 |
P2 | 0.1342 | −13.25 | −9.95 | |
P3 | 0.1342 | −13.13 | −9.80 |
Motion Model | Target | Resolution (m) | PSLR (dB) | ISLR (dB) |
---|---|---|---|---|
Stop-go model | P1 | 0.2333 | −15.64 | −13.35 |
P2 | 0.2350 | −15.29 | −13.05 | |
P3 | 0.2420 | −11.98 | −9.79 | |
Continuous rectilinear model | P1 | 0.2156 | −13.07 | −10.39 |
P2 | 0.2203 | −13.11 | −10.40 | |
P3 | 0.2250 | −11.53 | −8.63 | |
Continuous tangent model | P1 | 0.2156 | −13.08 | −10.39 |
P2 | 0.2203 | −13.11 | −10.41 | |
P3 | 0.2170 | −13.32 | −10.41 |
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Yu, Z.; Wang, S.; Li, Z. An Imaging Compensation Algorithm for Spaceborne High-Resolution SAR Based on a Continuous Tangent Motion Model. Remote Sens. 2016, 8, 223. https://doi.org/10.3390/rs8030223
Yu Z, Wang S, Li Z. An Imaging Compensation Algorithm for Spaceborne High-Resolution SAR Based on a Continuous Tangent Motion Model. Remote Sensing. 2016; 8(3):223. https://doi.org/10.3390/rs8030223
Chicago/Turabian StyleYu, Ze, Shusen Wang, and Zhou Li. 2016. "An Imaging Compensation Algorithm for Spaceborne High-Resolution SAR Based on a Continuous Tangent Motion Model" Remote Sensing 8, no. 3: 223. https://doi.org/10.3390/rs8030223