InSAR atmospheric distortions mitigation: GPS observations and NCEP FNL data

► Sparse ground GPS sites limit the correction of InSAR atmospheric distortion. ► Wind Speed extracted from NCEP FNL can implement Taylor's frozen-flow hypothesis. ► GPS and NCEP FNL are integrated to increase the density of wet delay control points. ► The dense wet delay control points can correct InSAR atmospheric effects effectively.