DiapOTB: a new open source tool for Differential SAR interferometry

Abstract:
Based on the heritage of DIAPASON, the legacy CNES interferometric processing, DiapOTB (Differential Interferometric Automated Process Open Tool Box) is a complete D-INSAR chain designed to work as an Orfeo Tool Box (OTB v7.0 or higher) remote module or as a standalone module. This module is a toolbox for computation of interferometric time series. It includes a registration module of all the images with respect to a master image. The registration accuracy is better than 0.1 pixel. Then the mean amplitude image, the interferogram and the coherence images are computed for each image pair. A DTM is used as input. The interferograms are thus differential interferograms with respect to the DTM. At this stage, DiapOTB is able to process Sentinel-1 images, both in stripmap and topsar modes, and also CosmoSkymed images both in stripmap and spotlight modes. Scripts are available in DiapOTB to generate co-registered SLC time-series as well as stacks of interferograms. Future plan is to extend DiapOTB to other sensors (such as TerraSAR-X/ PAZ).