研究目的
To propose an improved methodology based on atmospheric reanalysis data to estimate atmospheric artefacts in DIn-SAR/PSI, considering the realistic line of sight (LOS) path along satellite location and monitored points, rather than the zenith path delay.
研究成果
The proposed realistic calculation strategy based on atmospheric reanalysis data effectively mitigates atmospheric artefacts in PSI, providing more accurate atmospheric phase delay estimations than traditional zenith path methods, especially in cases of locally anisotropic atmosphere states.
研究不足
The method's effectiveness is dependent on the accuracy and resolution of the atmospheric reanalysis data. Spatial and temporal variations in atmospheric conditions can affect the results.
1：Experimental Design and Method Selection:
The methodology involves calculating the atmospheric phase delay by integrating the refractivity along the LOS direction using atmospheric reanalysis data.
2：Sample Selection and Data Sources:
Sentinel 1 datasets over Tenerife island, Spain, and ERA5 reanalysis data from ECMWF are used.
3：List of Experimental Equipment and Materials:
Sentinel 1 SAR data, ERA5 atmospheric reanalysis data.
4：Experimental Procedures and Operational Workflow:
Determination of sampling locations along LOS path, interpolation of atmospheric parameters on desired locations, and calculation of phase delay.
5：Data Analysis Methods:
Comparison of the proposed method with traditional zenith path delay methods using standard deviation of phase residues.
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