Volume 4 Issue 3
Jul.  2015
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Article Navigation >  Journal of Radars  > 2015  >  4(3): 276-286
Hong Jun, Lei Da-li, Wang Yu, Fei Chun-jiao. Wide Band and Wide Azimuth Beam Effect on High-resolution Synthetic Aperture Radar Radiometric Calibration[J]. Journal of Radars, 2015, 4(3): 276-286. doi: 10.12000/JR15015
Citation: Hong Jun, Lei Da-li, Wang Yu, Fei Chun-jiao. Wide Band and Wide Azimuth Beam Effect on High-resolution Synthetic Aperture Radar Radiometric Calibration[J]. Journal of Radars, 2015, 4(3): 276-286. doi: 10.12000/JR15015
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Wide Band and Wide Azimuth Beam Effect on High-resolution Synthetic Aperture Radar Radiometric Calibration

DOI: 10.12000/JR15015
  • 1.

    (National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)

  • 2.

    (University of Chinese Academy of Sciences, Beijing 100190, China)

  • Received Date: 2015-01-26
  • Rev Recd Date: 2015-04-30
  • Publish Date: 2015-06-28
    Abstract
  • Passive corner reflectors and active transponders are often used as man-made reference targets in Synthetic Aperture Radar (SAR) radiometric calibration, With the emergence of new radar systems and the increasing demand for greater accuracy, wide-band and wide-beam radars challenge the hypothesis that the Radar Cross Section (RCS) of reference targets is constant. In this study, the FEKO electromagnetic simulation software is used to obtain the change curve of the target RCS as a function of frequency and aspect angle while incorporating high-resolution point-target SAR simulation, and quantitatively analyzing the effect of the modulation effect on SAR images. The simulation results suggest that the abovementioned factors affect the SAR calibration by more than 0.2 dB within a fractional bandwidth greater than 10% or azimuth beam width of more than 20, which must be corrected in the data processing.

     

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