研究目的
To address the inaccuracy of the traditional hyperbolic range model in approximating the actual range equation for airborne synthetic aperture radar (SAR) in its diving stage, and to derive a precise two-dimensional spectrum using a high-order equivalent range model.
研究成果
The proposed high-order equivalent range model achieves higher accuracy than traditional models, facilitating precise imaging for diving stage SAR. Simulation results demonstrate its effectiveness, with satisfactory imaging performance for targets at different ranges.
研究不足
The paper does not explicitly discuss limitations, but potential areas for optimization could include computational intensity of high-order models and applicability to real-world scenarios beyond simulations.
1：Experimental Design and Method Selection:
The study proposes a high-order equivalent range model to accurately fit the range history in diving stage SAR, involving Taylor expansion and derivation of a two-dimensional spectrum using the principle of stationary phase (POSP).
2：Sample Selection and Data Sources:
Simulation experiments are conducted with specified radar parameters, including arbitrary point P on the ground and a swath width of 1000m.
3：0m.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Not explicitly mentioned in the paper; simulations likely use computational tools.
4：Experimental Procedures and Operational Workflow:
The range model is analyzed, the two-dimensional spectrum is derived, and simulations validate the model's effectiveness by comparing residual phase errors and imaging results with traditional methods.
5：Data Analysis Methods:
Residual phase errors are analyzed, and imaging performance is evaluated through impulse responses and azimuth responses using matched filters and interpolation operations.
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