TY - GEN
T1 - Analysis of Effects of Faraday Rotation on Geosynchronous SAR Imaging
AU - Sun, Shiyu
AU - Dong, Xichao
AU - Hu, Jiaqi
AU - Hu, Cheng
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/12
Y1 - 2019/12
N2 - Faraday rotation (FR) is the rotation of the polarization plane relative to the incident wave under the influence of the ionosphere when the signal passes through the ionosphere, which will affect Geosynchronous Synthetic Aperture Radar (GEO SAR) imaging. Due to the long synthetic aperture time characteristic, the time-freezing model assumption for traditional low earth orbit (LEO) SAR imaging will no longer be suitable for GEO SAR imaging analysis. Therefore, the effects of FR on GEO SAR imaging within the extremely long integration time need to be considered. In this paper, the expression of GEO SAR signal under the effects of FR is deduced, and a quantitative analysis for the amplitude-phase error caused by the FR effect in the integration time is conducted. Then, the results of the influence of FR on the amplitude and azimuth phase of the GEO SAR signal are given by using the measured TEC data. Finally, the global distribution map of FR is drawn, and the spatial distribution characteristics of FR are given.
AB - Faraday rotation (FR) is the rotation of the polarization plane relative to the incident wave under the influence of the ionosphere when the signal passes through the ionosphere, which will affect Geosynchronous Synthetic Aperture Radar (GEO SAR) imaging. Due to the long synthetic aperture time characteristic, the time-freezing model assumption for traditional low earth orbit (LEO) SAR imaging will no longer be suitable for GEO SAR imaging analysis. Therefore, the effects of FR on GEO SAR imaging within the extremely long integration time need to be considered. In this paper, the expression of GEO SAR signal under the effects of FR is deduced, and a quantitative analysis for the amplitude-phase error caused by the FR effect in the integration time is conducted. Then, the results of the influence of FR on the amplitude and azimuth phase of the GEO SAR signal are given by using the measured TEC data. Finally, the global distribution map of FR is drawn, and the spatial distribution characteristics of FR are given.
KW - Faraday rotation
KW - GEO SAR
KW - imaging effects
UR - http://www.scopus.com/inward/record.url?scp=85091932489&partnerID=8YFLogxK
U2 - 10.1109/ICSIDP47821.2019.9173454
DO - 10.1109/ICSIDP47821.2019.9173454
M3 - Conference contribution
AN - SCOPUS:85091932489
T3 - ICSIDP 2019 - IEEE International Conference on Signal, Information and Data Processing 2019
BT - ICSIDP 2019 - IEEE International Conference on Signal, Information and Data Processing 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE International Conference on Signal, Information and Data Processing, ICSIDP 2019
Y2 - 11 December 2019 through 13 December 2019
ER -