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Time- and Space-Varying Atmospheric Phase Correction in Discontinuous Ground-Based Synthetic Aperture Radar
Zengshu Huang1, Jinping Sun2, Qing Li3
1Electronics & Information Engineering, Beihang University, Beijing 100191, China. zengshu_huang@163.com.
Sensors (Basel, Switzerland)
|November 15, 2018
Summary
Atmospheric disturbances impact ground-based synthetic aperture radar (GB-SAR) deformation monitoring precision. This study proposes a novel algorithm to correct time- and space-varying atmospheric phases, improving monitoring accuracy.
Area of Science:
- Geosciences
- Remote Sensing
- Geophysics
Background:
- Ground-based synthetic aperture radar (GB-SAR) is crucial for 2D deformation measurement and trend extraction in monitoring applications.
- Atmospheric effects introduce phase disturbances in GB-SAR data, significantly degrading monitoring precision.
- Traditional atmospheric phase correction models are inadequate for discontinuous GB-SAR monitoring due to spatio-temporal atmospheric variations.
Purpose of the Study:
- To establish an interferometric phase signal model incorporating atmospheric phase effects.
- To analyze the time- and space-varying characteristics of atmospheric phases in GB-SAR monitoring.
- To develop and validate a novel algorithm for correcting these atmospheric phase variations.
Main Methods:
- Developed an interferometric phase signal model that accounts for atmospheric phase.
- Analyzed the temporal and spatial variability of atmospheric phases.
- Proposed a new time- and space-varying atmospheric phase correction algorithm utilizing coherent scatterers analysis.
- Conducted slope deformation monitoring experiments to validate the algorithm.
Main Results:
- The proposed algorithm effectively corrects for time- and space-varying atmospheric phases in GB-SAR data.
- Experimental results demonstrate the algorithm's validity and robustness in slope deformation monitoring.
- Improved precision in deformation monitoring by mitigating atmospheric disturbances.
Conclusions:
- The novel algorithm addresses the limitations of traditional methods for atmospheric phase correction in discontinuous GB-SAR monitoring.
- Accurate deformation monitoring using GB-SAR is achievable with effective atmospheric phase correction.
- The developed method offers a robust solution for enhancing the reliability of deformation monitoring systems.
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