1. A Fully Automatic and Cloud-Based P-SBAS DINSAR Pipeline for Sentinel-1 Processing
- Author
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De Luca, Claudio, Bonano, Manuela, Casu, Francesco, Manunta, Michele, Manzo, Mariarosaria, Meyer, Franz, Onorato, Giovanni, Zinno, Ivana, and Lanari, Riccardo
- Subjects
010504 meteorology & atmospheric sciences ,GNSS augmentation ,Computer science ,Pipeline (computing) ,0208 environmental biotechnology ,Cloud computing ,02 engineering and technology ,radar interferometry ,01 natural sciences ,Global Positioning System ,geodesy ,remote sensing by radar ,0105 earth and related environmental sciences ,Remote sensing ,Web services ,geographic information systems ,business.industry ,cloud computing ,Geodetic datum ,geophysical techniques ,terrain mapping ,Supercomputer ,geophysics computing ,DInSAR, P-SBAS, Cloud Computing, Sentinel-1, GPS ,020801 environmental engineering ,Interferometry ,Scalability ,Satellite ,business ,synthetic aperture radar - Abstract
In this work we present a cloud-computing based strategy for generating surface displacement time series and mean deformation velocity maps of very large areas by exploiting Sentinel-1 (S1) data. Our approach relies on the simultaneous exploitation of a fast access to the S1 data archives, High Performance Computing resources and external geodetic data. The presented pipeline is based on an advanced cloud- computing implementation of the differential SAR interferometry (DInSAR) Parallel Small BAseline Subset (P-SBAS) processing chain, which allows the fully unsupervised processing of huge Interferometric Wide Swath (IWS) Sentinel-1 data volumes. In particular, for what concerns the S1 data archives, we benefited from the NASA’s Alaska Satellite Facility (ASF) Distributed Active Archive Center (DAAC), which stores and distributes S1 SAR data from Amazon Web Service (AWS) for advancing Earth science research. The ASF- DAAC allowed us to reach a very high performance level in terms of downloading time and system reliability. Moreover, we exploited the geodetic measurements provided from the Magnet + Global GPS Network Map of the Nevada Geodetic Laboratory at the University of Nevada, Reno, USA (UNR-NGL), which supply GPS measurements daily updated and continuosly available. The GPS measurements were used to account for regional trends and to better discriminate the low (tectonic) and high (local) frequency deformation patterns. The presented solution is highly scalable and has been migrated to the Amazon Web Service (AWS) environment. It runs out along an automatic routine to generate the mean deformation velocity maps of the vertical and horizontal (East-West) displacement components of the whole investigated area. The developed pipeline has been tested on ascending and descending Sentinel-1 archives acquired over a large area of Southern California (US), which extends over about 150,000 square kilometers.
- Published
- 2019