Li, Zhuo and Quegan, Shaun and Chen, Jie and Rogers, Neil (2015) Performance analysis of phase gradient autofocus for compensating ionospheric phase scintillation in BIOMASS P-band SAR data. IEEE Geoscience and Remote Sensing Letters, 12 (6). pp. 1367-1371. ISSN 1545-598X
Full text not available from this repository.Abstract
The P-band synthetic aperture radar of the European Space Agency BIOMASS mission will be affected by ionospheric phase scintillation at high latitudes, which introduces a random high-order azimuth phase error. The dependence of the performance of the phase gradient autofocus (PGA) algorithm for scintillation compensation on the strength of ionospheric turbulence and the signal-to-clutter ratio (SCR) is analyzed. In order to keep resolution degradation below 2%, the SCR must exceed 16 and 20 dB for turbulence strengths CkL = 1033 and 1034, respectively. For large values of CkL, phase scintillation adds significantly to post-PGA degradation in the integrated and peak sidelobe ratios. Simulations based on scenes derived from PALSAR data demonstrate the effectiveness of PGA.