Interferometric Processing of Sentinel-1 TOPS Data

Abstract—Sentinel-1 (S-1) has an unparalleled mapping capacity. In interferometric wide swath (IW) mode, three subswaths imaged in the novel Terrain Observation by Progressive Scans (TOPS) SAR mode result in a total swath width of 250 km. S-1 has become the European workhorse for large area mapping and interferometric monitoring at medium resolution. The interferometric processing of TOPS data however requires special consideration of the signal properties, resulting from the ScanSAR-type burst imaging and the antenna beam steering in azimuth. The high Doppler rate in azimuth sets very stringent coregistration requirements, making the use of enhanced spectral diversity (ESD) necessary to obtain the required fine azimuth coregistration accuracy. Other unique aspects of processing IW data, such as azimuth spectral filtering, image resampling, and data deramping and reramping, are reviewed, giving a recipe-like description that enables the user community to use S-1 IW mode repeat-pass...

• Type: Journal
• Year: 2016
• Where: TGRS
• Authors: Nestor Yague-Martinez, Pau Prats-Iraola, Fernando Rodríguez González, Ramon Brcic, Robert Shau, Dirk Geudtner, Michael Eineder, Richard Bamler
• Keywords: TGRS 2016