Scan Patter Syncronization in ENVISAT Wide Swath Mode

Ciro Cafforio(1) , Andrea Monti Guarnieri(2) , Pietro Guccione(1) , and Betlem Rosich(3)

(1) Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy
(2) Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133, Milano, Italy
(3) ESA-ESRIN, Via Galileo Galilei, 00044 Frascati, Italy


The recent availability of single look complex Envisat ScanSAR product (WSS), opens new perspective in the field of interferometry for large scale, short revisit time applications. Several interferograms over large swaths, up to 400 km have already been generated demonstrating the feasibility of such techniques. However, it is known that interferometry in ScanSAR mode is subject to a suitable synchronization between scan pattern. In this paper we investigate some properties of the scan pattern synchronization, and on constraints coming from the Doppler centroid and the baseline. We evaluate the occurrence of such synchronization for random scans, and we show preliminary statistics from ENVISAT acquisitions. Finally, we provide examples of ScanSAR WSM/IM and WSM/WSM interferometry.


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