Performance analysis of phase gradient autofocus for compensating ionospheric phase scintillation in BIOMASS P-band SAR data

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

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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.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Geoscience and Remote Sensing Letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2208
Subjects:
ID Code:
73301
Deposited By:
Deposited On:
13 Mar 2015 13:42
Refereed?:
Yes
Published?:
Published
Last Modified:
06 May 2020 03:25