Science
NASA sounding rocket captures multi-point data inside atmospheric sporadic E layers
Measurements from five simultaneous sensors reveal unexpected internal structures within radio-disrupting metallic plasma layers.
The short version
- NASA's SpEED Demon sounding rocket demonstrated the first simultaneous multi-point measurement inside a sporadic E layer using four deployed probes and a main payload.
- Data published in the Journal of Geophysical Research: Space Physics showed the metallic ion layer has a complex, rolled structure shaped by neutral winds rather than forming a flat sheet.
- These high-altitude metallic layers can disrupt long-distance communications, air traffic control signals, and GPS accuracy.
- Researchers plan to publish further findings from subsequent missions that applied the same sensor-deployment method during solar eclipses and at lower latitudes.
Key facts
- The SpEED Demon sounding rocket launched from NASA's Wallops Flight Facility in Virginia on August 24, 2022, led by researchers from Embry-Riddle Aeronautical University.[NASA News]
- The rocket ejected four dropsonde probes to take simultaneous measurements alongside the main payload across five distinct points within a sporadic E layer.[NASA News]
- Sporadic E layers are formed roughly 60 miles up in the ionosphere by metallic vapor from disintegrating meteors, reflecting radio frequencies and interfering with GPS, radar, and communications.[NASA News]
- The collected data showed the metallic layer split into two peaks and interacted with atmospheric turbulence, creating a swirling structure comparable to a cinnamon roll rather than a uniform sheet.[NASA News]
- Follow-up missions using the multi-probe architecture were launched to study the 2023 and 2024 solar eclipses, as well as lower-latitude sporadic E layers from the Marshall Islands in June 2025.[NASA News]
What remains uncertain
- While researchers found the layer's shape consistent with Kelvin-Helmholtz billows, this mechanism remains unconfirmed because the flight did not directly measure local winds or electric fields.[NASA News]