Performance Analysis of Phase Gradient Autofocus for Compensating Ionospheric Phase Scintillation in BIOMASS P-Band SAR Data

Zhuo Li; Shaun Quegan; Jie Chen; Neil C. Rogers

doi:10.1109/LGRS.2015.2402833

Performance Analysis of Phase Gradient Autofocus for Compensating Ionospheric Phase Scintillation in BIOMASS P-Band SAR Data

Zhuo Li
, Shaun Quegan
, Jie Chen
, Neil C. Rogers

电子信息工程学院

Beihang University
University of Sheffield
Lancaster University

科研成果: 期刊稿件 › 文章 › 同行评审

39 引用（Scopus）

摘要

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 C_kL=10³³ and 10³⁴, respectively. For large values of C_kL, 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.

源语言	英语
文章编号	7047673
页（从-至）	1367-1371
页数	5
期刊	IEEE Geoscience and Remote Sensing Letters
卷	12
期	6
DOI	https://doi.org/10.1109/LGRS.2015.2402833
出版状态	已出版 - 6月 2015

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10.1109/LGRS.2015.2402833

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title = "Performance Analysis of Phase Gradient Autofocus for Compensating Ionospheric Phase Scintillation in BIOMASS P-Band SAR Data",

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.",

keywords = "Image quality, ionospheric phase scintillation, phase gradient autofocus (PGA), synthetic aperture radar (SAR)",

author = "Zhuo Li and Shaun Quegan and Jie Chen and Rogers, \{Neil C.\}",

note = "Publisher Copyright: {\textcopyright} 2004-2012 IEEE.",

year = "2015",

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doi = "10.1109/LGRS.2015.2402833",

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T1 - Performance Analysis of Phase Gradient Autofocus for Compensating Ionospheric Phase Scintillation in BIOMASS P-Band SAR Data

AU - Li, Zhuo

AU - Quegan, Shaun

AU - Chen, Jie

AU - Rogers, Neil C.

PY - 2015/6

Y1 - 2015/6

N2 - 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.

AB - 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.

KW - Image quality

KW - ionospheric phase scintillation

KW - phase gradient autofocus (PGA)

KW - synthetic aperture radar (SAR)

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DO - 10.1109/LGRS.2015.2402833

M3 - 文章

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VL - 12

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EP - 1371

JO - IEEE Geoscience and Remote Sensing Letters

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ER -

Performance Analysis of Phase Gradient Autofocus for Compensating Ionospheric Phase Scintillation in BIOMASS P-Band SAR Data

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