Pan Am Plane Crash That Inspired Modern Safety Briefings Found After 74 Years
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As of July 20, the public can access data from the two powerful radar instruments aboard the NISAR (NASA-ISRO Synthetic Aperture Radar) satellite. Teams in the United States and India will release files processed from the satellite’s L-band and S-band radars on an ongoing basis, helping researchers and other users track the movement of Earth’s land and ice masses, monitor changes in ecosystems like forests and wetlands, and respond to natural hazards such as landslides and earthquakes.
The release comes as NASA and ISRO (Indian Space Research Organisation) prepare to celebrate the first anniversary of NISAR’s July 30, 2025, launch from India’s Satish Dhawan Space Centre. Since that time, the mission engineering and science teams have been busy calibrating instrumentation, refining algorithms, and monitoring nearly all the planet’s land- and ice-covered surfaces twice every 12 days. Along the way, the team has captured scenes from around the globe — urban street grids, agricultural fields, landslides, earthquakes, and sinking land in Mexico City.
An early image released Tuesday revealed the fractured, barren surface of an Antarctic landscape in stark detail. In a merging of science and serendipity, it also resembles something else entirely: a hummingbird.
Despite its otherworldly quality, the Antarctic image shows a very real geographical feature called Nunatak Zaterjavshijsja, a mountaintop in East Antarctica, poking out amid a stream of ice flowing northeast to the ocean. As the moving glacier passes the obstruction, the mountain’s topography causes stresses in the ice, heavily fracturing the surrounding surfaces with deep cracks, called crevasses, which show as sharp green lines in the image.
“First, it’s a beautiful image, with rich details of features that provide insights to how the glacier is moving. Then, because radar can often see through snow and deep into the ice, NISAR can observe fundamentally different properties of Antarctic ice than can be seen in optical imagery,” said Seongsu Jeong, the signal analysis engineer who produced the image at NASA’s Jet Propulsion Laboratory in Southern California. “With NISAR we’re seeing what’s hidden beneath the surface.”
Generated with measurements that NISAR’s L-band instrument gathered in August 2025, as U.S. and Indian mission teams tested the satellite’s systems, the “hummingbird” exemplifies one of the young mission’s hallmarks: intricately detailed imagery that is both informative and eye-catching.
The colors show differences in the way polarized microwave signals, which vibrate in different directions, interact with and reflect from the ice. Over Antarctica, NISAR transmits radar waves toward Earth with a horizontal polarization. The orientation of the signals that return — either horizontal, vertical, or both — provide clues about the object or surface that reflected them.
Signals that come back with a horizontal polarization likely bounced off a more regular surface, such as smooth ice. Those signals appear magenta in the image. Signals that return with vertical polarization may have refracted as they partially penetrated the snow and ice or scattered at different angles as they reflected off irregular surfaces, such as the faces of crevasses. Called volume scattering, these observations are displayed in green.
The white represents areas in which magenta and green signals scatter back strongly, a possible indication that there is an equal blend of surface and volume scattering.
The same scene viewed in optical light is almost entirely white with ice and snow. Slight shadows and rippling indicate the presence of the mountaintop, and textures in the surrounding area suggest the ice is not completely smooth.
The NISAR satellite is the first free-flying space mission to feature two radar instruments: an L-band system and an S-band system. The systems are complementary due to their differing wavelengths. For example, the longer-wave L-band can pass through tree canopies, imaging the ground beneath. Meanwhile, depending on leaf sizes, S-band can collect observations of those canopies.
The Indian science team, based at ISRO’s Space Applications Centre in Ahmedabad, recently started releasing S-band data via the Bhoonidhi portal.
On July 20, the U.S. side of the mission started releasing calibrated products continuously for all L-band measurements collected since June 17. By the end of the year, the team expects to have released all data acquired earlier during science operations. The NISAR project science team previously had two limited releases of L-band data, the first in January of about 25 sample products and a release in February of thousands of pre-calibrated products.
As with the earlier releases, data users will be able to download the latest files at the Alaska Satellite Facility Distributed Active Archive Center in Fairbanks, which hosts and distributes all NASA synthetic aperture radar data.
The NISAR mission’s science data output is vast, on the order of dozens of terabytes a day, due to the satellite’s frequent coverage of nearly all the land and ice surfaces on Earth. It scans from within a few degrees of the South Pole in Antarctica to 77.5 degrees north latitude, above the Arctic Circle.
Managed by Caltech, JPL leads the U.S. component of the project and provided the satellite’s L-band SAR and antenna reflector. The spacecraft bus and its S-band SAR were provided by ISRO.
The NISAR satellite is the first to carry two SAR instruments at different wavelengths, collecting data using the spacecraft’s giant drum-shaped reflector, which measures 39 feet (12 meters) wide — the largest radar antenna reflector NASA has sent into space.
To learn more about NISAR, visit:
https://science.nasa.gov/mission/nisar/
Media Contacts
Andrew Wang / Andrew Good
Jet Propulsion Laboratory, Pasadena, Calif.
626-379-6874 / 818-393-2433
andrew.wang@jpl.nasa.gov / andrew.c.good@jpl.nasa.gov
2026-049
NISAR (NASA-ISRO Synthetic Aperture Radar) systematically maps Earth, measuring changes of our planet’s surface as small as a centimeter.

In order to study the Earth as a whole system and understand how it is changing, NASA develops and supports…

Open access to NASA’s archive of Earth science data

NASA Earth Science helps Americans respond to challenges and societal needs — such as wildland fires, hurricanes, and water supplies…

Landslides in Alaska. Air quality in Atlanta. Fire clouds out West. From the Arctic fringes to farm country, NASA’s newest class of suborbital Earth Venture missions is gearing up to deliver science that will benefit communities in the United States and beyond.
The six projects will mobilize hundreds of scientists and pilots from NASA, the U.S. Navy, universities, and other institutions over the next several years. While the investigations range across topics, a defining feature of suborbital missions is the use of sensors mounted on aircraft.
Airborne remote sensing serves as a bridge between ground-based instruments and satellites. Data collected via planes, helicopters, drones, and balloons can fill in gaps in computer models used by weather forecasters, city planners, and others.
The first project to take wing this summer is Injected Smoke and PYRocumulonimbus Experiment (INSPYRE), led by the Naval Research Laboratory. From mission headquarters in Colorado, the team will chase one of the least understood forms of severe weather on Earth: towering “fire clouds” generated when extreme wildfires burn hot enough to brew their own thunderstorms.
Smoky and crackling with lightning, these unique storms can create blind spots for aviators above and spark new blazes below. Measuring and mapping the dangerous storms as they develop in real-time will help scientists forecast them in the future. Several aircraft, including NASA’s high-altitude ER-2, flying out of Montana, will carry a large suite of instruments over wildfire-generated storm systems. Among them will be two state-of-the-art infrared wildfire trackers, which were developed at NASA’s Jet Propulsion Laboratory (JPL) in Southern California and will be flying as part of the agency’s FireSense program.
Agricultural emissions represent an important and understudied part of Earth’s land and atmosphere systems. The FarmFlux mission, which kicks off this year, will deploy more than a dozen sensors to measure ozone, methane, ammonia, particulates, and other pollutants rising from agricultural lands and animal farms stretching from the Midwest to California’s Central Valley. These emissions affect human health, global climate, and stratospheric ozone. The mission is led by NASA’s Goddard Space Flight Center in Greenbelt, Maryland, along with Colorado State University, and Boston University.

Two North American cities with air quality concerns are Atlanta and Mexico City. But the causes differ, with weather and terrain playing a role. To explore these differences, the Hemispheric Airborne Measurements of Air Quality (HAMAQ) mission will investigate areas of poor air in the two capitals and test how satellite information can help forecasting and mitigation efforts. The team will deploy two aircraft at different altitudes: NASA’s P-3B will fly close to the surface, directly measuring fine particle and gaseous pollutants, while the recently acquired 777 science jet will soar high above, mapping pollution with remote sensors. NASA’s Langley Research Center in Hampton, Virginia, is leading the mission.
As the Arctic warms at least twice as fast as the rest of Earth, data collected today can help guide communities on the front lines of change.
The Snow4Flow campaign, led by the University of Arizona, seeks to measure and model how far and fast glaciers are retreating in the far north. Traversing remote icescapes across Alaska, the Yukon, Arctic Canada, Greenland, and Svalbard, Norway, they’ll sound both the near-surface and frozen depths of hundreds of glaciers while flying over in a modernized WWII-era aircraft outfitted with a scanning laser altimeter and two custom radars. Their observations, combined with satellite data and advanced models of snowfall and glacier flow, will advance our understanding of how glaciers behave in different regions of the Arctic. The mission seeks to uncover not just what these glaciers look like beneath the surface today, but the processes that will drive changes in the future.
As permafrost thaws, rivers on the doorstep of the Arctic become conveyor belts of carbon and sediment. NASA Goddard, and the City College of New York lead a multidisciplinary team studying how rivers, lagoons, and estuaries across Alaska’s North Slope interact with the Arctic Ocean. The project, called Frontlines of Rapidly Transforming Ecosystems (FORTE) will combine optical and radar measurements from satellites, planes, high-tech research vessels, drones, and underwater autonomous systems to track microscopic marine life, water flow, and chemistry. The team will collaborate with local and tribal communities to sustain observations over time and apply NASA assets to address emerging local needs and decision-making priorities.
When a slow-moving landslide in California suddenly collapsed and buried a section of coastal highway in 2017, scientists at NASA JPL wanted to know how precipitation swings played a role. JPL studies how water infiltrates and destabilizes hillslopes all over the world. The Landslide Change Characterization Experiment (LACCE) project will combine airborne synthetic aperture radar with land-based sensors to track how slopes in California are responding to a world of intensifying droughts and downpours. The project also takes aim at emerging landslide hazards in Alaska, where rapidly retreating glaciers are accelerating slope movements that have the potential to create mega-tsunamis.
NASA’s Earth Venture Suborbital program, designed to be nimble and high impact, was established following a recommendation by the National Research Council in 2007. In the decades since, teams have studied phenomena, including blizzards, coral reefs, and ocean whirlpools.
Your home. Our Mission. And the one planet that NASA studies more than any other.

NASA’s Earth Observatory brings you the Earth, every day: images, stories, and discoveries about the environment, Earth systems, and climate.

NASA Earth Science helps Americans respond to challenges and societal needs — such as wildland fires, hurricanes, and water supplies…

Collection of Earth science videos explaining a variety of concepts and activities performed by NASA’s Earth Science Division.

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Come next year, those looking to explore the globe virtually via Google Earth will have to do so on their smartphone or from within their browser, as the search giant has decided to discontinue the service’s desktop client in June 2027.
The good news is, the lights won’t be going out immediately. According to a post made on Google Earth’s official support community by Community Manager [Aamir F.], the June cutoff date applies to new downloads, but nothing is changing on the backend, so existing installs will continue to work.
Now, while it’s safe to assume that you’ll have little trouble finding an alternate download of the Google Earth client for years to come, there’s no telling how long before they quit working. It probably goes without saying that Google won’t be providing updates to the software anymore, so if there’s any kind of breaking change on either the API side or at the OS level, that’s the end of the road. There’s always a chance that Google will decide to release the source and turn the whole thing over to the community… but we wouldn’t hold our breath on that one.
To be fair, we have absolutely no doubt that the majority of Google Earth users already access the service via the smartphone app or their browser. Honestly, you could say the same thing about most services these days. So in that respect, it’s not much of a surprise that Google doesn’t feel like keeping the native version going. That said, several commenters in the community thread pointed out features from the desktop client that aren’t available in the other versions.
Are you still using Google Earth on the desktop? Will this change impact something you’re working on? We’d love to get your take on this in the comments below.
Thanks to [Mark Lloyd] for the tip.
4 min read
The Northwest Earth and Space Science Pathways (NESSP) project recently concluded its 2025–2026 ROADS (Rover Observation And Discoveries in Space) from Earth to Venus National Challenge, a NASA Science Activation program student challenge that engaged more than 500 students on 120 teams from eight states in authentic science and engineering experiences inspired by Venus exploration.
The challenge began with educator professional development in August 2025, preparing teachers and mentors to guide students through the ROADS experience. Registered teams then worked through challenge checkpoints from January through May 2026, with in-person Hub events held in April and May 2026 to give students opportunities to showcase their work, connect with peers, and engage with NASA-inspired STEM (Science, Technology, Engineering, and Mathematics) activities.
NESSP, led by Central Washington University in Ellensburg, Washington, creates opportunities for students and educators to connect with NASA science through hands-on STEM learning. The ROADS framework challenges upper elementary, middle, and high school students to work collaboratively on mission-inspired activities that mirror the ways NASA scientists and engineers investigate planetary environments and prepare for future exploration.
Throughout the academic year, ROADS from Earth to Venus teams completed eight Mission Objectives focused on science, engineering, teamwork, and communication. Students documented their work in Mission Development Logs, designed mission patches, modeled carbon movement on Earth and Venus, investigated the greenhouse effect, collected remote sensing data using kite-mounted cameras, programmed robotic rovers to navigate Venus-inspired terrain, explored NASA-related careers, and presented their final mission stories through virtual submissions and regional Hub events.
In addition to completing the challenge virtually, many students participated in in-person Hub events hosted by NESSP partner institutions, including Central Washington University, Montana State University, and Northern Arizona University. These events gave teams the opportunity to showcase their work, exchange ideas with peers, interact with mentors, and experience college campuses as part of a broader STEM learning community.
“The ROADS Challenge gives students the opportunity to do more than learn about NASA missions – they become part of the mission,” said Dr. Darci Snowden, Director of NESSP. “I am especially proud of this year’s teams. Students took on an exceptionally broad set of mission objectives, from modeling carbon cycles and designing experiments to conducting remote sensing operations with kites and programming rovers to navigate challenging terrain while collecting scientific data. These students participated because they were curious, motivated, and eager to learn. By investigating authentic mission challenges, collaborating with teammates, and sharing their ideas with others, students develop the confidence and skills needed to see themselves as future scientists, engineers, educators, and explorers.”
NESSP recognized top teams across elementary, middle, and high school divisions for outstanding participation and exemplary Mission Development Logs.
In the Elementary School Division, NESSP recognized The Evil Twins, The Acid Clouds, Flaming Asteroid Nebulas, and The NASA Intelligence, all from Silverdale, Washington.
In the Middle School Division, NESSP recognized Venus Ascenders from Mukilteo, Washington; Project Fuego Venus from Safford, Arizona; Galaxy Dragons from Sequim, Washington; The Four Folds from Hardin, Montana; and Crater Lake Crusaders from Medford, Oregon.
In the High School Division, NESSP recognized Laborantem from Columbus, Montana; Velocity to Venus from Sequim, Washington; Puget Sound Propulsion from Mukilteo, Washington; and Evergreen Explorers from Mukilteo, Washington.
Highlights from this year’s challenge, including student presentations and special recognitions, are available through the ROADS from Earth to Venus Virtual Recognition Ceremony on the NESSP YouTube channel, @nwessp.
Educators, families, and community organizations can continue to access ROADS from Earth to Venus activities and educational resources, along with materials from previous ROADS challenges, through the NESSP website at www.nwessp.org.
NASA’s Northwest Earth and Space Science Pathways project is supported by NASA cooperative agreement award number 80NSSC22M0006 and is part of NASA’s Science Activation Portfolio, which connects learners with authentic NASA science experiences through partnerships with educators and community organizations.
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