Beaver, "Two- dimensional phase gradient autofocus," SPIE-Image Reconstruction from Incomplete Data, vol. 4123, pp. 162-173, 2000.Warner D W,Ghiglia D C,Fitzgerrel A,et al. Two-dimensionalphase gradient autofocu
And then,the stripphase gradient autofocus(PGA) algorithm is ameliorated. 首先建立了适合机载UWB SAR成像几何的相位误差模型,并分析了其特点;然后针对模型特点,对条带式相位梯度自聚焦算法作出改进,同时提出一种基于空不变因子估计的加权相位梯度自聚焦算法。
In one embodiment the phase shift of modulation in light emitted by the laser scanner 20 and the point X is determined and evaluated to obtain a measured distance d. The speed of light in air depends on the properties of the air such as the air temperature, barometric pressure, relative ...
For real-time autofocus of defocused images produced by Synthetic Aperture Radar(SAR), the twodimensional autofocus approach proposed in this study is used to correct the residual range cell migration and compensate for the phase error. Next, a block-wise Phase Gradient Autofocus(PGA) is used to...
gradient adaptive algorithm was adopted to reconstruct the echoes in range dimension.Then the method of minimizing the entropy of the average range profile was applied to estimate the parameters which are used to compensate translation components of the received echoes.Besides,the phase adjustment and ...
Phase gradient autofocus-a robust tool for high resolution SAR phase correction. IEEE Trans. Aerosp. Electron. Syst. 1994, 30, 827–835. [Google Scholar] [CrossRef] Van Rossum, W.L.; Otten, M.P.G.; Van Bree, R.J.P. Extended PGA for range migration algorithms. IEEE Trans. Aerosp....