研究目的
To analyze the influence of motion parameter errors on SAR azimuth resolution degradation for SAR payloads on orbital stations using Monte Carlo simulation.
研究成果
The Monte Carlo analysis effectively provides the probability distribution of SAR azimuth resolution degradation, showing that about 86.68% of cases meet the requirement (second order phase error within [-60°, 60°]). This indicates that real-time SAR imaging may not always achieve the desired resolution without more precise sensors, aiding in system design decisions.
研究不足
The simulation assumes motion parameter errors are statistically independent and normally distributed, which may not fully capture real-world complexities. The method relies on specific error parameters and may not account for all possible error sources or environmental factors.
1：Experimental Design and Method Selection:
A Monte Carlo simulation model is used to analyze the probability distribution of SAR azimuth resolution degradation caused by motion parameter errors. The second order phase error from Doppler frequency rate error is selected as an intermediate variable.
2：Sample Selection and Data Sources:
Error samples are generated based on normal distributions for attitude, position, and velocity errors, with parameters provided in Table
3：List of Experimental Equipment and Materials:
No specific equipment or materials are mentioned; the simulation is computational.
4：Experimental Procedures and Operational Workflow:
Generate 10,000 error samples for each error type (attitude, position, velocity) using normal distributions. Calculate Doppler frequency rate with errors, then second order phase error, and finally determine azimuth resolution degradation.
5：Data Analysis Methods:
Statistical analysis of the results to obtain distribution parameters (mean and standard deviation) for the second order phase error.
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