Joint Estimation of Ground Displacement and Atmospheric Model Parameters in Ground-Based Radar

Atmospheric delay is the primary error in ground-based synthetic aperture radar (GBSAR). The existing compensation methods include external meteorological data correction method, polynomial fitting and persistent scatterers SAR interferometry (PSInSAR) calibration method. Combining targets most popular method of GBSAR atmospheric compensation. However, displacement component coherent target always ignored compensation, which unpractical. A joint estimation ground model parameters developed this paper. determined by spatial temporal features objects. regarded as a systematic represented quadratic related to distance. result resolved least-square Compared root-mean-square (RMSE) proposed had significant improvement validation experiment. In real situ experiment, time series obtained similar trend that acquired Global Positioning System (GPS) receiver. It indicated can lead better deformation taking into account