期刊
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
卷 5, 期 3, 页码 717-722出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTARS.2012.2191143
关键词
Calibration; GPR; high-order terms; polarimetry
类别
资金
- National Natural Science Foundation of China [40974068]
- Program for New Century Excellent Talents in University [NCET-09-0415]
- Jilin University Foundation for Distinguished Young Scientists [201005006]
- National Public Benefit Scientific Research Foundation of China [201011078]
- National Innovation Research Project for Exploration and Development of Oil Shale [OSP-02, OSR-02]
To provide meaningful data, polarimetric ground penetrating radar (GPR) requires accurate calibration of channel imbalance and crosstalk not only in the amplitude term but also in the phase term. Currently, calibration techniques usually ignore higher-order terms to simplify equations. These techniques, though very easy to perform, provide less accurate calibration results for the crosstalk. To improve the accuracy of calibration, we have derived a new mathematical formulation to calibrate a polarimetric GPR system. We measured several scattering matrices to obtain the necessary calibration parameters. The calibration technique was tested from measurements conducted on a 22.5 degrees oriented dihedral corner reflector from 1 to 6 GHz with a step of 0.1 GHz. The calibrated results are found to be consistent with the theoretically values, especially for the crosstalk.
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