Tropospheric Heterogeneities Corrections in Differential Radar Interferometry
نویسندگان
چکیده
Differential radar interferometry (DInSAR) has been used more and more widely to monitor crustal deformations due to underground mining and oil extraction, earthquakes, volcanoes, landslides, and so on. However, tropospheric heterogeneities have been identified as one of the major errors in DInSAR, which can be up to 40cm as derived from dual-frequency GPS measurements in the example given in this paper. Therefore, it is crucial to correct the tropospheric heterogeneities in the DInSAR results for monitoring crustal deformation. These corrections from several GPS stations in the radar imaging area can be interpolated and applied to the DInSAR results. The discussions are based on data from the Tower Colliery test site southwest Sydney, Australia.
منابع مشابه
A Double Differencing Algorithm for GPS-derived Tropospheric Delay Corrections to Differential Radar Interferometry
Tropospheric heterogeneity can lead to misinterpretation of differential radar interferometric results. A betweensite and between-epoch double-differencing algorithm for the derivation of tropospheric corrections to radar results using GPS measurements is proposed. In order to correct the radar result on a pixel-by-pixel basis, the GPS-derived corrections have to be interpolated. Using the GPS ...
متن کاملSAR interferometry: Tropospheric corrections from GPS observations
Interferometric Synthetic Aperture Radar (InSAR) techniques have been recognised as an ideal tool for many ground deformation monitoring applications. However, the spatially and temporally variable delay of the radar signal propagating through the atmosphere is a major limitation to accuracy. The dominant factor to be considered is the tropospheric heterogeneity, which can lead to misinterpreta...
متن کاملGPS-Derived Tropospheric Delay Corrections to Differential InSAR Results
Differential Interferometric Synthetic Aperture Radar (DInSAR) techniques have been recognised as an ideal tool for many ground deformation monitoring applications. However, the spatially and temporally variable delay of the radar signal propagating through the atmosphere is a major limitation to accuracy. The dominant factor to be considered is the tropospheric heterogeneity, which can lead to...
متن کاملTropospheric Delay Corrections to Differential Insar Results from Gps Observations
Differential Interferometric Synthetic Aperture Radar (DInSAR) techniques have been recognised as well-suited for ground deformation monitoring applications. However, the spatially and temporally variable delay of the radar signal propagating through the atmosphere represents a major limitation to accuracy. The dominant factor to be considered is the tropospheric heterogeneity, which can lead t...
متن کاملGPS Derived Tropospheric Delay Corrections to Radar Interferometry
Synthetic Aperture Radar Interferometry (InSAR) has been recognised as a well-suited tool for topographic mapping and ground deformation monitoring applications. However, the spatially and temporally variable tropospheric delay represents a major limitation to InSAR applications. On the other hand, it has become feasible to derive tropospheric corrections from continuous GPS for InSAR due to th...
متن کامل