ESA and CAS Approved Smile for Science Operations
The joint mission has transitioned to science operations to study solar wind interactions with Earth's magnetic field.
Updated on Sept. 30, 2026 in Space
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The European Space Agency and the Chinese Academy of Sciences have officially approved the Smile spacecraft for science operations following a multi-month commissioning period. The mission carries four science instruments designed to monitor solar wind interactions.
Why it matters
The mission aims to study how the solar wind interacts with Earth's magnetic field, providing data on geomagnetic phenomena. This collaborative research effort seeks to better understand space weather dynamics.
The spacecraft features 4 science instruments, including the UVI that recently captured 45 hours of aurora footage. Teams are currently refining SXI settings to reduce stray light interference.
The players
European Space Agency
An international organization dedicated to the exploration of space, managing satellite operations and scientific research.
Chinese Academy of Sciences
A national scientific research institution that oversees space science programs and international satellite collaborations.
The details
The Smile mission utilizes a suite of four sensors to observe the interaction between the solar wind—a stream of charged particles released from the sun—and the Earth's magnetic field. The UVI (Ultraviolet Imager) instrument is tasked with mapping auroral activity, while the SXI (Soft X-ray Imager) focuses on detecting plasma boundaries. Engineers are currently implementing software updates to mask stray light that currently disrupts the SXI when oriented toward Earth.
Timeline
June 20, 2026: Commissioning and testing period began.
July 24, 2026: UVI instrument captured aurora footage.
September 30, 2026: Smile mission approved for science operations.
Mid-October 2026: Stray light levels are expected to reach a minimum.
The Tech Race
Smile represents a significant advancement in monitoring solar-terrestrial dynamics, aiming to provide continuous coverage of magnetic field interactions. It builds upon established heliophysics research to map how solar activity influences the Earth's environment.
While the mission currently provides data to scientific teams, the findings will contribute to improved modeling of space weather, which can affect satellite operations and ground-based infrastructure. These results are not yet available for public use or commercial application.
The takeaway
The transition to full science operations marks a shift toward data collection for the Smile mission. Observers should monitor for successful magnetopause imaging results expected to follow the mid-October reduction in SXI stray light.
What happens next
Teams expect stray light levels on the SXI instrument to hit a minimum in mid-October 2026, at which point the instrument will attempt to capture images of the magnetopause or northern polar cusp.
Further reading
For more information on current orbital research, visit the Space archive.
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