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Three-Dimensional Imaging Algorithm for Forward-Moving ROSAR
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AI
DOI：10.1109/LGRS.2013.2286161.png)
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Abstract
En 中文
In this letter, we present the mode of forward-moving rotor synthetic aperture radar (ROSAR) to achieve 3-D imaging for the front area of the low-altitude aircraft. First, the geometric model is given, and the signal property is analyzed. Based on which, spatial offsets and coupling in the azimuth and along-track directions are corrected in the frequency domain, and then, the forward-moving ROSAR is simplified as a stop-and-go mode in the along-track direction. After 2-D imaging in the range-azimuth direction, a 3-D image can be obtained by range-along-track focusing with the improved range-Doppler algorithm. Moreover, azimuth depth of focusing is also given to maintain the imaging quality. Finally, simulation results prove the feasibility and effectiveness of the proposed method for this new imaging mode.
Keywords:
Improved range-Doppler algorithm
offset correction
rotor synthetic aperture radar (SAR) (ROSAR)
3-D imaging
Journal
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