Aimee Merkel stood in her lab at the University of Colorado Boulder, staring at a simulation of Earth’s upper atmosphere rippling like silk in the wind — a quiet moment before the storm of data that her team’s mission, DAPHNE, will soon unleash. The twin-satellite mission, freshly selected by NASA, is poised to unravel one of the most elusive puzzles in space science: how the churning of Earth’s lower atmosphere shapes the turbulent space weather high above. This isn’t just about understanding invisible winds 100 kilometers up — it’s about protecting the GPS signals guiding our planes, the satellites beaming internet to remote villages, and the astronauts who will one day walk on Mars.
For decades, space weather forecasting has focused on the sun — solar flares, coronal mass ejections, and the charged particles that slam into Earth’s magnetic field. But scientists increasingly recognize that the weather below us matters just as much. Atmospheric waves generated by thunderstorms, jet streams, and even hurricanes can ripple upward, disrupting the delicate balance of the ionosphere and thermosphere. These disturbances can scramble radio signals, degrade satellite orbits, and expose astronauts to unexpected radiation. DAPHNE aims to close this knowledge gap with precision.
The mission, officially called the Dynamic Atmosphere-Ionosphere Explorer, will launch no earlier than 2029 and cost no more than $250 million (in 2023 dollars), excluding launch. From its vantage in low Earth orbit, the twin satellites will make coordinated, multipoint measurements of neutral winds, temperature, and composition in the thermosphere — a region where Earth’s atmosphere transitions into space. By capturing how energy from the lower atmosphere propagates upward, DAPHNE will feed critical data into space weather models, improving forecasts the way ocean buoys revolutionized hurricane tracking.
"NASA is advancing the United States' leadership as a space weather-ready nation, and by providing new insights into Earth's atmosphere we can better predict and prepare for impacts in our daily lives on Earth and in space," said Nicky Fox, associate administrator of NASA’s Science Mission Directorate. As Artemis astronauts prepare to return to the Moon and missions to Mars edge closer to reality, understanding the full chain of atmospheric influence — from ground to orbit — is no longer a luxury. It’s a necessity.
If confirmed in its 2027 review, DAPHNE will join a growing fleet of NASA observatories that don’t just look outward — they look down, inward, and all around, mapping the invisible forces that connect our planet to the cosmos. In doing so, it may help ensure that the next generation of explorers doesn’t fly blind into the storm.