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Principal Investigator and Quality Assessment Reports Evaluate Umbra Synthetic Aperture Radar Data

2026-07-09 18:14

Two new reports from NASA’s Commercial Satellite Data Acquisition (CSDA) program evaluate data from the Umbra X-band Synthetic Aperture Radar (SAR) satellite constellation for the NASA Earth science research and applications community. The results of these evaluations help to inform NASA program management and the user community about the quality of these commercial data for use in NASA science.

NASA’s CSDA program released the Umbra SAR Principal Investigator Evaluation Summary and Umbra SAR Quality Assessment Reports in May 2026. (The cover of the Quality Assessment Report is shown at left.) The results of these evaluations help inform NASA program management about the quality of this commercial data for use in NASA science. At right, a collage of synthetic aperture radar images from Umbra.
Credit: NASA CSDA program / © Umbra Lab Inc., 2026. All Rights Reserved

The CSDA Umbra Synthetic Aperture Radar Umbra SAR Principal Investigator Evaluation Summary documents the findings of evaluation teams.  The teams  were given access to the Umbra archive as well as the ability to task the Umbra constellation for new acquisitions. The tasking capability allowed evaluation teams to test the utility of Umbra data in time-sensitive workflows and to monitor areas experiencing rapid change and/or emergent environmental conditions, such as harmful algal blooms.

Although the Principal Investigator Evaluation Summary supports the use of Umbra SAR data for NASA Earth science research and applications overall, it noted several strengths and weaknesses of the Umbra X-band data. Strengths included access to a very high spatial resolution X-band SAR satellite constellation; taskable access to high temporal repeat opportunities with quick turnaround; imaging flexibility with a range of azimuth and incidence angles; and the company’s Open Data Program. Conversely, the PI teams reported weaknesses, including issues with Umbra geolocation (noting large and small geolocation errors), limited software compatibility, metadata, and some missing technical documentation.

Additionally, the CSDA Umbra Synthetic Aperture Radar Umbra SAR Quality Assessment Report documents the results of radiometric and geometric analyses performed by NASA subject matter experts (SMEs) enlisted to evaluate the fundamental quality of the Umbra data following the Joint NASA/European Space Agency (ESA) assessment guidelines (ESA-NASA, 2024).

Performed mainly on the single-look complex (SLC) Level 1 data products in Sensor Independent Complex Data (SICD) format, along with some additional Level 2 products used in science usability assessments by the evaluation team, the CSDA SMEs found the spatial resolution of the data agreed with Umbra’s specifications. However, the quality analysis results for geolocation accuracy did not universally align with the company’s specifications. Given these results, the SME’s concluded that “the overall positioning performance of the Umbra data did not meet the expected accuracy.

Regarding the radiometric performance of the data, which was assessed in terms of absolute accuracy, stability, and sensitivity, the SMEs found the data “underperform[ed] relative to that of well-calibrated reference SAR systems.”

About the CSDA Program

The CSDA program was established to identify, evaluate, and acquire data from commercial sources that support the NASA Earth science research and application goals. NASA’s Earth Science Division recognizes the potential impact commercial satellite constellations may have in encouraging/enabling efficient approaches to advancing Earth System Science and applications development for societal benefit. Commercially acquired data may also provide a cost-effective means to augment and/or complement the suite of Earth observations acquired by NASA, other U.S. government agencies, and international partners.

To read the reports in full, see the links under “Evaluation” heading on the CSDA’s Umbra commercial vendor webpage

Curiosity Sees Martian Sulfur Up Close

2026-07-09 16:33

A closeup of sulfur crystals inside a Martian rock.
NASA/JPL-Caltech/MSSS

This close-up view shows fragments of sulfur crystals — the first ever seen on the Red Planet. The crystals were found after NASA’s Curiosity Mars rover happened to drive over a rock and crush it on May 30, 2024. Several days later, Curiosity used a camera on the end of its robotic arm to take this image.

A recent paper in Science suggests that the sulfur formed when magma deep below the surface released fluids or gases that deposited sulfur on the Red Planet’s surface about 3 billion years ago.

Image credit: NASA/JPL-Caltech/MSSS

NASA Scientists Take to Air and Space to Study Arctic Sea Ice

2026-07-09 15:42

5 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater)

A collage of four vertical aerial photographs showing different views of sea ice. From left to right: 1) A vibrant orange and red sunset glowing just above the horizon over a vast expanse of dark blue, shadowed sea ice. 2) A view from an aircraft window showing a section of the plane's wing in the foreground, overlooking a sprawling plain of blue-tinted ice beneath a clear sky that fades to pink at the horizon. 3) A view looking past an airplane's dark engine cowling and propeller blade, showing bright white sea ice fractured by a network of dark, branching cracks under a bright, hazy sun. 4) A downward aerial view of heavily textured, bright white sea ice split by a wide, jagged, dark crack (a lead) exposing the open water beneath.
These four views were captured from a World War II-era aircraft in April 2026, when scientists used instruments aboard the plane to study Arctic sea ice. Their flights were timed to coincide with satellites passing overhead so the airborne and orbital data could be combined.
NASA/JPL-Caltech

This month, engineers at NASA’s Jet Propulsion Laboratory in Southern California are testing a spacecraft sensor that will help measure how quickly Arctic sea ice is disappearing. And while that instrument won’t launch for another year, scientists started preparing for its use during a recent field campaign in the Canadian wilderness.

Researchers spent two weeks in April flying above the Arctic Ocean, often watching sunrise from an altitude of 1,500 feet (457 meters) in a World War II-era plane. A variety of cutting-edge sensors used to measure the thickness of sea ice and snow were aboard the plane, including a stand-in for the microwave radiometer now undergoing testing at JPL. Measuring sea ice thickness is tricky, requiring a number of precise figures, including how high the sea ice rises above water, the depth of snow on top of that ice, and microwave emissions from the surface.

Flights were timed to the passage of satellites overhead so coordinated observations could be taken of the same features. Combining the airborne and satellite data will improve scientists’ ability to measure sea ice and understand how climate conditions are evolving across the Arctic.

In recent decades, the extent and thickness of Arctic sea ice have changed. Improving measurements of those changes helps scientists better understand the Arctic system while supporting navigation, weather and ocean research, and future satellite observations. As Arctic shipping activity increases, the region is also becoming strategically and economically more significant.

According to Sahra Kacimi of JPL, who served as the field campaign’s science lead, ongoing warming in the Arctic could potentially impact public safety and economic interests.

Find out what Arctic sea ice looked like as scientists studied it from the air — and using space-based instruments — during a field campaign this past April.
Credit: NASA/JPL-Caltech

Frequent flyers

Kacimi has spent years studying sea ice using satellite data, but the top-down view she gets from space is different than peering out a plane’s window.

The bewildering diversity of sea ice creates otherworldly landscapes. The ice can be attached to land or adrift in the ocean; it can be rough or smooth. Driven by winds and ocean currents, the ice is constantly shifting, breaking apart, and deforming. Cracks can open into long stretches of exposed ocean, and collisions between floes can push ice rubble into massive ridges that extend for miles.

Some sea ice lasts only one season, while thicker ice can survive for several years (though multiyear sea ice is becoming less common in many parts of the Arctic). Entire ecosystems are affected by these changes, down to the arctic foxes and hares the scientists spotted throughout the trip.

Improving estimates of sea ice thickness helps scientists better understand how the region is changing and supports long-term observations of the Arctic environment. The NASA team logged about 50 hours in the air over the two-week campaign, conducting flights over drifting ice near the town of Inuvik before studying ice fixed to the shore of another location, a hamlet called Cambridge Bay.

For the Inuvik portion of the campaign, the team coordinated with the Surface Water and Ocean Topography (SWOT) mission, a satellite jointly developed by NASA and the French space agency, CNES (Centre National d’Études Spatiales), with JPL leading the United States component of the mission. Though it was designed to map the height of the globe’s sea and fresh water, SWOT can also measure the amount of sea ice above the waterline.

In Cambridge Bay, the NASA team joined researchers from ESA (European Space Agency), Germany’s Alfred Wegener Institute, and Canada’s University of Calgary. During this part of the campaign, coordinated flights soared over a field camp and under the tracks of satellite missions such as NASA’s Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) and ESA’s CryoSat-2.

To improve sea ice thickness estimates, ESA is developing, with cooperation from NASA, a new polar mission called Copernicus Polar Ice and Snow Topography Altimeter (CRISTAL). During the April airborne campaign, scientists flew instruments similar to what CRISTAL will carry, including the microwave radiometer now being tested at JPL.

“Combining observations from space, air, and ground surface instruments is essential for developing and validating algorithms for current and future missions,” Kacimi said.

For the scientists, it was also a chance to meet locals who see the Arctic’s changes up close. Kacimi spoke to community leaders and students at a STEM camp about how disappearing ice is affecting their communities.

“I’m used to looking at sea ice from space and thinking about its role in the global climate, but for people living in the Arctic, it carries a much deeper meaning,” Kacimi said.

Media Contacts

Andrew Good
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-2433
andrew.c.good@jpl.nasa.gov

Liz Vlock
NASA Headquarters, Washington
202-358-1600
elizabeth.a.vlock@nasa.gov

2026-043

Super Typhoon Bavi

2026-07-09 04:01

The eyewall of a super typhoon is partially illuminated by moonlight in a nighttime satellite image.
Moonlight illuminates the western side of Super Typhoon Bavi’s eyewall at about 15:30 Universal Time on July 5 (1:30 a.m. local time on July 6). The image was acquired with the VIIRS (Visible Infrared Imaging Radiometer Suite) day-night band on the NOAA-20 satellite.
NASA Earth Observatory/Michala Garrison

In early July 2026, for the second time in three months, a powerful typhoon crossed the U.S. Northern Mariana Islands and Guam in the North Pacific Ocean. Super Typhoon Bavi was at peak intensity when it neared the islands on the night of July 5, bringing winds of 290 kilometers (180 miles) per hour, along with torrential rain and dangerous storm surge.

This nighttime image, captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) on the NOAA-20 satellite, shows Bavi’s eye at about 15:30 Universal Time on July 5 (1:30 a.m. local time on July 6). Light from the Moon, which was in the waning gibbous phase, illuminates the eyewall’s western side. The eye passed over Rota, north of Guam, several hours after the image was acquired.

Bavi became a super typhoon in the early hours of July 4 local time while tracking west over the warm ocean. Satellite observations indicated that sea surface temperatures were around 30 degrees Celsius (86 degrees Fahrenheit) in the region. Bavi was the third tropical cyclone in 2026 to reach category 5 intensity on the Saffir-Simpson wind scale.

The typhoon caused extensive damage across Guam, Rota, and Saipan, according to news reports, downing power poles and lines; flooding roads and littering them with debris; and damaging buildings, including a water distribution station on Rota. U.S. Coast Guard crews worked to clear navigation hazards in the waterways around Guam and the Northern Marianas and reopen ports as dangerous marine conditions subsided, according to reports. This damage comes on top of destructive winds and flooding from Super Typhoon Sinlaku, which crossed the islands in mid-April.

The spiraling clouds of Super Typhoon Bavi appear over the Philippine Sea southeast of Taiwan. The storm’s westward track is shown in colors corresponding to wind speed.
Super Typhoon Bavi tracked west over the Northern Mariana Islands toward Asia in early July 2026. The storm’s clouds and path are overlaid on a Blue Marble: Next Generation image built from scenes captured by the MODIS (Moderate Resolution Imaging Spectroradiometer). The image of the storm was captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) on the NOAA-21 satellite on July 8, 2026, at about 04:30 Universal Time.
NASA Earth Observatory/Michala Garrison

On July 8, Bavi remained a powerful typhoon as it moved west over the Philippine Sea. In the early afternoon, when the image above was captured, the National Weather Service reported maximum sustained wind speeds of 250 kilometers (155 miles) per hour. Forecasts indicated the typhoon’s track could bend northwest toward Taiwan, the Ryukyu Islands of southern Japan, and mainland China and weaken over the next several days.

Writing in Yale Climate Connections, meteorologist Jeff Masters said that Bavi is the type of storm that might be expected when a strong El Niño event is building, which is currently the case. El Niño-year typhoons may form farther east, giving them more time over warm water to intensify before curving toward Asia, Masters explained, “resulting in a greater chance of reaching Category 5 intensity.”

NASA Earth Observatory images by Michala Garrison, using data from NASA EOSDIS LANCEGIBS/Worldview, and the Joint Polar Satellite System (JPSS), and hurricane track data from the U.S. Naval Research Laboratory. Story by Lindsey Doermann.

References & Resources

You may also be interested in:

Stay up-to-date with the latest content from NASA as we explore the universe and discover more about our home planet.

Super Typhoon Sinlaku

3 min read

The violent storm aimed at the U.S. Northern Mariana Islands and Guam in mid-April 2026.

Article

Typhoon Jangmi

2 min read

The sprawling storm promised to deliver torrential rain across a wide swath of southern Japan.

Article

Gravity Waves From Super Typhoon Sinlaku

4 min read

Satellites observed striking upper-atmosphere phenomena generated by an intensifying tropical cyclone.

Article

Students Connect NASA Science With Indigenous Knowledge to Study Coastal Erosion

2026-07-08 21:04

3 min read

Students Connect NASA Science With Indigenous Knowledge to Study Coastal Erosion

Three students sitting around a classroom table looking at NASA satellite images.
Students return from fieldwork and sit together in the classroom, examining NASA satellite images to learn about the changes to their community’s coastline.

Story by Keri Moskowitz, Gulf of Maine Research Institute

For the Pleasant Point Passamaquoddy Reservation, or Sipayik, the ocean has always been a teacher. Situated in what is known as Downeast Maine, along the shores of Passamaquoddy Bay, generations of Indigenous people have lived along the coast, learning from the tides, the land, and their elders. But today, the shoreline is changing more rapidly. Coastal erosion is slowly taking land away. Land that already holds a history of loss.

In the summer of 2023, inspired by a trip to Fairbanks, AK to attend Climate Change in My Community  – a workshop organized by the NASA Science Activation (SciAct) program’s Arctic and Earth Signs project – SciAct’s Learning Ecosystems Northeast (LENE) team began working with partners, including Indigenous leaders and scientists, to ask an important question: What does coastal erosion mean to people who have already lost land?

By November 2024, planning was underway at Sipayik Elementary School. The goal was to bring together Western science and Indigenous knowledge so students could understand the changes happening in their own community.

The lessons began in March 2025. For five weeks, nine 5th-grade students explored erosion in many ways. They visited local field sites and listened to elders share stories about how the coastline used to look. Learners used these accounts to measure the changes, both on the coast and via maps back in the classroom. They built erosion trays from simple materials to test how waves shape the land. They measured current high tide lines and compared them to historical ones. They studied old photographs and aerial images from 1942 to 2023 to see how much the shoreline had moved. They even compared 300-year-old tribal maps with future flood projections.

Students learned that science does not only live in textbooks. As one observer shared, “Our people were scientists without having to go to school.”

The students were curious, engaged, and proud. They saw that resilience is part of who they are. They have always adapted while holding on to culture. 

In June of 2026, the students were invited to the Gulf of Maine Research Institute to present their work to scientists, staff, and REU (Research Experience for Undergraduate) interns. They traveled 3.5 hours for this opportunity, and the journey proved worthwhile. During the Q&A portion following their slideshow, someone asked whether learning to read the various maps was difficult. One student responded with a reminder: these were not merely maps but NASA satellite images.

Future goals for the project include inviting more elders and adding more field sites in the work, strengthening language and cultural connections, sharing student learning with other Native youth, and planning resilience strategies like marsh restoration in coordination with tribal leadership. When the students were asked if they planned to continue their studies and work on this cause after their time in the classroom ended, they all resoundingly stated “YES”.

In Sipayik, the story of erosion is not just about land washing away. It is about memory, knowledge, identity, and the strength of a community that continues to learn from the shore.

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Details

Last Updated

Jul 08, 2026

Editor
NASA Science Editorial Team

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