DEM error retrieval by analyzing time series of differential interferograms

Lionel Bombrun (1) , Michel Gay (2, 1) , Emmanuel Trouvé (3) , Gabriel Vasile (1) , Jerome I. Mars (1)

1 GIPSA-SIGMAPHY - GIPSA - Signal Images Physique
2 GIPSA-Services - GIPSA-Services
3 LISTIC - Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance

2-pass Differential Synthetic Aperture Radar Interferometry (D-InSAR) processing have been successfully used by the scientific community to derive velocity fields. Nevertheless, a precise Digital Elevation Model (DEM) is necessary to remove the topographic component from the interferograms. This letter presents a novel method to detect and retrieve DEM errors by analyzing time series of differential interferograms. The principle of the method is based on the comparison of fringe patterns with the perpendicular baseline. First, a mathematical description of the algorithm is exposed. Then, the algorithm is applied on a series of four one-day ERS-1/2 interferograms.

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Lionel Bombrun, Michel Gay, Emmanuel Trouvé, Gabriel Vasile, Jerome I. Mars. DEM error retrieval by analyzing time series of differential interferograms. IEEE Geoscience and Remote Sensing Letters, 2009, 6 (4), pp.830-834. ⟨10.1109/LGRS.2009.2026434⟩. ⟨hal-00441633⟩