The Seamless SAR Archive (SSARA) Project and Other SAR Activities at UNAVCO

Wednesday, 17 December 2014
Scott Baker1, Christopher J Crosby2, Charles M Meertens3, Eric Jameson Fielding4, Gwendolyn Bryson5, Brian Buechler6, Jeremy Nicoll6 and Chaitanya Baru7, (1)UNAVCO, Inc. Boulder, Boulder, CO, United States, (2)UNAVCO, Boulder, CO, United States, (3)UNAVCO, Inc., Boulder, CO, United States, (4)Jet Propulsion Lab Caltech, Pasadena, CA, United States, (5)Alaska Satellite Facility, Fairbanks, AK, United States, (6)University of Alaska Fairbanks, Fairbanks, AK, United States, (7)National Science Foundation, CISE, Arlington, VA, United States
The seamless synthetic aperture radar archive (SSARA) implements a seamless distributed access system for SAR data and derived data products (i.e. interferograms). SSARA provides a unified application programming interface (API) for SAR data search and results at the Alaska Satellite Facility and UNAVCO (WInSAR and EarthScope data archives) through the use of simple web services. A federated query service was developed using the unified APIs, providing users a single search interface for both archives. Interest from the international community has prompted an effort to incorporate ESA’s Virtual Archive 4 Geohazard Supersites and Natural Laboratories (GSNL) collections and other archives into the federated query service. SSARA also provides Digital Elevation Model access for topographic correction via a simple web service through OpenTopography and tropospheric correction products through JPL’s OSCAR service. Additionally, UNAVCO provides data storage capabilities for WInSAR PIs with approved TerraSAR-X and ALOS-2 proposals which allows easier distribution to US collaborators on associated proposals and facilitates data access through the SSARA web services. Further work is underway to incorporate federated data discovery for GSNL across SAR, GPS, and seismic datasets provided by web services from SSARA, GSAC, and COOPEUS.