As of July 20, the public can finally get their hands on data from the NISAR satellite's two powerful radar instruments - because nothing says "summer blockbuster" like terabytes of Earth-monitoring data. Teams in the US and India will release files processed from the satellite’s L-band and S-band radars on an ongoing basis, helping researchers track the movement of land and ice, monitor ecosystems like forests and wetlands, and respond to natural hazards such as landslides and earthquakes. Basically, it's like having a really paranoid security camera for the planet.

The release comes as NASA and ISRO prepare to celebrate the first anniversary of NISAR’s July 30, 2025, launch from India’s Satish Dhawan Space Centre. Since then, the mission 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, they've captured scenes of urban grids, agricultural fields, landslides, earthquakes, and sinking land in Mexico City - because Earth never takes a vacation.

An early image released Tuesday revealed the fractured, barren surface of an Antarctic landscape in stark detail. It also, in a merging of science and serendipity, looks exactly like a hummingbird. Because of course it does.

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. As the moving glacier passes the obstruction, the mountain’s topography stresses the ice, creating 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," said Seongsu Jeong, the signal analysis engineer who produced the image at NASA’s Jet Propulsion Laboratory. "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. With NISAR we’re seeing what’s hidden beneath the surface." So basically, radar sees what your eyes can't - like the hidden drama under a glacier.

Generated with measurements from NISAR’s L-band instrument in August 2025, the "hummingbird" exemplifies the mission’s hallmark: intricately detailed imagery that is both informative and eye-catching. The colors show differences in how polarized microwave signals interact with and reflect from the ice. Signals that return with horizontal polarization (magenta) likely bounced off smooth ice; vertical polarization (green) indicates volume scattering from crevasses or refracted signals. White areas represent a blend of both. In optical light, the same scene is almost entirely white - boring! - with slight shadows and rippling. NISAR's radar gives it personality.

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 longer-wave L-band can pass through tree canopies, while S-band collects observations of canopies depending on leaf sizes. The Indian science team recently started releasing S-band data via the Bhoonidhi portal. On July 20, the US side started releasing calibrated products for all L-band measurements collected since June 17. By year's end, they expect to release all data acquired earlier. Data users can download files at the Alaska Satellite Facility Distributed Active Archive Center - because where else would you store radar data about ice?

The NISAR mission's science data output is vast - dozens of terabytes a day - due to frequent coverage of nearly all land and ice surfaces. It scans from within a few degrees of the South Pole to 77.5 degrees north latitude. Managed by Caltech, JPL leads the US component, while ISRO provided the spacecraft bus and S-band SAR. The satellite carries two SAR instruments with a giant drum-shaped reflector measuring 39 feet (12 meters) wide - the largest radar antenna reflector NASA has sent into space. Because if you're going to spy on Earth, you might as well do it with style.