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Sentinel-1 Resources

Earthdata resources for users working with NASA’s Sentinel-1 data include tutorials and other learning resources, news announcements such as instrument updates and data releases, user guides and related documents, and frequently asked questions.

Sentinel-1 Documents

Name Description File Type Date Published
OPERA_DISP-S1_ATBD_D-108765_Rev_A_v1.0.0_Final Algorithm Theoretical Basis Document for OPERA Surface Displacement from Sentinel-1 data PDF (1.2 mb) March 30, 2026
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Sentinel-1 Learning Resources

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Screenshot of an unwrapped interferogram with the water mask applied

InSAR Water Masking

Learn about the water masking option provided by NASA’s Alaska Satellite Facility Distributed Active Archive Center (ASF DAAC) for on-demand Sentinel-1 interferometric synthetic aperture radar (InSAR).
StoryMap
Aug. 23, 2024
Earthdata graphic identifier on patterned background

InSAR Water Masking

This tutorial demonstrates the impact that water masking can have on your phase unwrapping results.
Tutorial
Aug. 23, 2024
Earthdata grphic identifier on ice sheet map

Change Detection Using OPERA Sentinel-1 RTC

Discover the process of using synthetic aperture radar (SAR) for visualizing changes in a landscape caused by disturbances such as floods, deforestation, agriculture, and freeze/thaw cycles.
Tutorial
March 23, 2024
image showing a segment of rive with changes indicated in red, blue, and yellow colors.

Change Detection Using OPERA Sentinel-1 RTC

View a change detection workflow for Radiometric Terrain-Corrected products from Sentinel-1 (RTC-S1) provided by NASA's OPERA project and Alaska Satellite Facility Distributed Active Archive Center (ASF DAAC).
StoryMap
March 4, 2024
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Sentinel-1 News

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SAR land data image with globe pattern overlay

From ERS-1 to NISAR: 35 Years of SAR at ASF

August 2026 marks 35 years since the first downlink of synthetic aperture radar data to the Alaska SAR Facility. ASF has supported many missions and archived many Earth observations since then.
Blog
Aug. 17, 2026
Pictured is satellite imagery of portions of Montana, Idaho, and Wyoming. Portions of the map are colored blue for areas of EMIT and SAR data masking. Yellow where there is landing cover masking. Red where high-resolution model training was used. Dots for training point data. And white to show the total area of analysis extent.

Homing In On the Range

USGS researchers found NASA’s imaging spectroscopy satellite data could significantly improve identification of vegetation types across rangelands.
News
June 25, 2026
OPERA Radiometric Terrain Corrected Synthetic Aperture Radar Backscatter image of Singapore on 17 February 2026 from ESA's Sentinel-1C satellite

Singapore's Shipping Strait

Image captured on February 17, 2026, by the C-Band SAR instrument aboard ESA's Sentinel-1C platform.
Worldview Image of the Week
Feb. 27, 2026
OPERA RTC SAR Backscatter image of flooding in Mozambique on 24 January 2026 from the C-Band SAR instrument aboard the Sentinel-1 satellite.

Flooding in Mozambique

Image captured on December 18, 2025, by the C-Band SAR instrument aboard ESA's Sentinel-1A platform.
Worldview Image of the Week
Jan. 29, 2026
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