Now that RTC and InSAR products are available through Vertex, we are preparing to retire this legacy service. As of September 30, 2021, you will no longer be able to process new data through https://hyp3.asf.alaska.edu, and all data previously ordered through the legacy interface will be deleted. If you need to preserve any of the data you acquired through previous processing efforts, we recommend you download the data prior to the September 30 deadline.
Radiometric correction involves removing the misleading influence of topography on backscatter values. Terrain correction is the process of correcting geometric distortions that lead to geolocation errors.
Change Detection is a technique that detects which areas have changed between two synthetic aperture radar scenes. The unique properties of SAR can detect changes that aren't easily visible in optical imagery.
Interferometric synthetic aperture radar (InSAR), is a radar technique using two or more synthetic aperture radar (SAR) images to generate maps of surface deformation or digital elevation, using differences in the phase of the waves returning to the satellite or aircraft.
The Earthdata Login provides a single mechanism for user registration and profile management for all our system components. Your Earthdata login also helps us better understand the usage of our services to improve your experience through customization of tools and improvement of services. ASF's Synthetic Aperture Radar (SAR) data is openly available to all and free of charge except where governed by international agreements.
Specify all of the attributes necessary to identify your area of interest including geography, polarization, paths, direction, start date, and the type of SAR processing you want.
Once you have subscribed, ASF will monitor newly acquired SAR data, process granules matching your requirements, and have the resulting products ready and waiting for you here.