NASA’s New Radar Just Pulled Off Something Impossible on Earth
Europa Clipper used a Mars flyby to prove its REASON ice-penetrating radar works in space—bringing in 60 GB of echoes and de-risking the instrument before Europa science in the 2030 timeframe.
Published on: Aug 4, 2025
During Europa Clipper’s March Mars flyby, the team performed a first-in-space checkout of the REASON radar by transmitting and receiving echoes from the Martian surface—something that can’t be replicated end-to-end on Earth. The successful test produced a 60 GB dataset and gave the science team an early opportunity to validate processing pipelines and interpret radargrams ahead of Europa operations. The radar is designed to probe Europa’s ice shell for subsurface structures and potential water pockets, helping constrain ice thickness and ocean–ice exchange processes.
Key Takeaways
The Mars flyby enabled an end-to-end radar echo test that’s impractical to reproduce on Earth at flight configuration scale.
REASON operated as planned and returned usable radargrams, providing an early “real data” pipeline rehearsal.
The team collected ~60 GB of instrument data, accelerating readiness work well before Europa flybys.
Programmatically, the flyby also served the mission’s primary trajectory-shaping gravity assist while supporting calibration opportunities.
Institutions
NASA Jet Propulsion Laboratory (JPL)
Pasadena, California, United States
California Institute of Technology (Caltech)
Pasadena, California, United States
University of Texas at Austin
Austin, Texas, United States
Johns Hopkins Applied Physics Laboratory (APL)
Laurel, Maryland, United States
NASA Kennedy Space Center
Merritt Island, Florida, United States
Journal
SciTechDaily
