Get Data In this UAVSAR Pauli decomposition, the Holitna River runs through the center of the image. The river is located in southwest Alaska and is the largest river system in the Kuskokwim River basin. The Hoholitna River, seen at the top of the image, is a major tributary and joins the Holitna 20 miles (32 km) from the Kuskokwim River. Both rivers flow through a vast wilderness area and the flat landscape accounts for the extreme serpentine nature of the rivers and the formation of oxbow lakes – U-shaped lakes that form when a meander of a river is cut-off. Many of these lakes are visible is this image. Credit: NASA/JPL 2018 Get Data This multi-temporal RGB composite uses three images of the Mekong Delta acquired at different times during the last year to create a wonderful array of colors. Colorful pixels represent temporal variation while white to black pixels have not experienced any significant change. The diversity of color highlights the region's mix of crop types and the diversity of rice cultivation methods. Because of the ability of SAR to image during the rainy season, this technique is a useful tool for mapping and classifying crop type and rice production methods year round. Credit: Copernicus Sentinel data 2019, processed by ESA; courtesy Rowan Biessel, ASF Get Data Visible in this false color ALOS PALSAR mosaic image, the Tanezrouft Basin in the Sahara Desert is one of the most desolate locations on Earth, and is known as the “land of terror” from its lack of water and vegetation. Salt flats and sandstone outcroppings create various patterns only visible from high above the landscape. The data were acquired in ‘dual polarization’, from which the artificial color composite was generated. © JAXA/METI 2007; Credit: Jeff Hickey, ASF Get Data This 1978 Seasat image of Central Pennsylvania's Susquehanna Lowlands was taken by the first civilian SAR mission. Different signal returns from the ridges and valleys reveal their formation through ancient tectonic compression. Pressure from the southeast buckled the rocks into long ridges. Erosion of softer rocks formed valleys, while harder rocks remained in the ridges. Bright spots along the river represent buildings in towns. Get Data In this ALOS AVNIR-2 image, the interaction of wind and local topography are seen to produce a scouring of rocky hills in southwestern Namibia. This sand-free region, with its own local albedo, stands as a beautiful anomaly in the 1,000-mile-long Namib Desert.


On Demand Sentinel-1 InSAR Products Now Available in Vertex!

InSAR is a powerful tool for detecting changes in the Earth's surface, useful for detecting deformation or motion of any kind at the millimeter scale. Glaciers, volcanos, earthquakes, and landslides are among the many applications that can benefit from InSAR.With On Demand products requested through Vertex, you are only a few clicks away from having analysis-ready InSAR interferometric products. Using GAMMA software and the Copernicus GLO-30 DEM, HyP3 generates On Demand products in record time, usually less than an hour for up to 200 products. The best part is that it is all free. InSAR has never been easier. Check it out on Vertex On Demand.

The Copernicus GLO-30 DEM is the default option for HyP3 On Demand products!

The newly free and open Copernicus GLO-30 DEM improves RTC products in the case where previous DEMs were incorrectly geolocated. The Copernicus DEM enables the generation of RTC and InSAR products over any global landmass, including previously unavailable regions such as Greenland, Iceland, and Antarctica. InSAR products will be enhanced in areas where ground motion has occurred.


Dr. Steve Bowman is profiled on the NASA Earthdata website

Dr. Bowman is the Geologic Hazards Program Manager with the Utah Geological Survey and member of the ASF DAAC User Working Group. Find out how he uses SAR for geologic emergency response, and researching and mapping geologic hazards.

Two Part SAR Webinar: Part 1- Introduction to Synthetic Aperture Radar (SAR) Data

Part 1 of a webinar hosted by GIS specialist, Heidi Kristenson, which includes a basic introduction to SAR data collection, the datasets that are available from the ASF DAAC, and the processing required to extract useful information from the data.

Two-Part SAR Webinar: Part 2- Applications of SAR Data in GIS Environments

Part 2 of a webinar hosted by GIS specialist, Heidi Kristenson, which focuses on Sentinel-1 datasets, discussing options for generating Radiometric Terrain Corrected (RTC) datasets, and present workflows using both ArcGIS and QGIS software.

Training and Resources

Synthetic Aperture Radar: Hazards

This six-week edX course teaches the fundamentals of the use of Synthetic Aperture Radar (SAR) remote sensing for disaster monitoring. The course is FREE, with the option to pursue a Verified Certificate. Next class September 7. Information online

SAR Image Gallery

SAR Scientist Highlight


APR 2021 -- Rod Boyce

Josef Kellndorfer, PhD

Josef Kellndorfer heartily remembers receiving computer hard drives in the mail containing the data he needed for his research in the 1990s.

Those hard drives came from the Alaska Satellite Facility (ASF), traveling the roughly 4,400 miles to Massachusetts, where he worked at the Woods Hole Research Center, now known as the Woodwell Climate Research Center. Today he is a distinguished visiting scientist at the center but maintaining a strong connection to the satellite facility.

Things have changed mightily since those hard-drive days. He now gets the data he needs from the ASF by tapping on his computer keyboard.

He has been an integral player over his years of official and unofficial connection to the ASF Distributed Active Archive Center (DAAC), which is funded by NASA and part of the University of Alaska Fairbanks Geophysical Institute. And it has shown in the sharp increase in the number of researchers acquiring the data. They tap in from around the globe.

Josef is among the people who they can thank for that.