The SMILE (Solar wind Magnetosphere Ionosphere Link Explorer) mission has been successfully launched aboard a Vega-C rocket from the European Spaceport in French Guiana, marking the beginning of its operational phase after a liftoff that represents one of the most significant milestones of the program.
This satellite is part of the European Space Agency’s (ESA) scientific mission portfolio and belongs to a line of Earth space environment exploration built upon results from previous missions such as Cluster and XMM-Newton, both essential for advancing the understanding of near-Earth space and the universe in the X-ray domain.
The SMILE mission was jointly developed by the European Space Agency (ESA) and the Chinese Academy of Sciences (CAS).
The satellite is now in orbit after successfully completing the launch phase. CT has contributed to this mission through validation and verification activities of critical electronic systems to ensure their proper operation in orbit.
CT’s contribution to the mission
Within this international project, CT has carried out key activities to ensure the correct performance of critical onboard electronic systems.
Specifically, CT has supported the validation of the Instrument Control Unit (ICU), the system responsible for coordinating the operation of scientific instruments, managing data flow, and executing essential functions for satellite operations in orbit.
This work included participation in full integration and test campaigns for Airbus Crisa, covering functional testing, vibration testing, thermal vacuum testing, and electromagnetic compatibility testing. These validation activities are essential to ensure that the systems can operate reliably under the extreme conditions of the space environment.
CT has also contributed to the hardware verification of an FPGA integrated into one of the ICU electronic boards. This component is responsible for storing all data acquired by the onboard scientific instruments. This information will later be transmitted and analyzed by ground-based scientific teams, making its correct operation critical to the mission’s success.
These activities require a very high level of technical rigor, as any in-orbit failure would have a direct impact on system operability.
The reliability of these systems is especially relevant for a mission like SMILE, which aims to improve the understanding of space weather phenomena and their impact on Earth.
Understanding how the Sun affects Earth
The space environment surrounding our planet is constantly influenced by solar activity. The continuous flow of charged particles emitted by the Sun, known as the solar wind, interacts with Earth’s magnetic field, generating phenomena such as auroras, as well as disturbances that can directly affect technological systems in orbit and on the ground.
Severe space weather events can interfere with satellites, positioning systems, communications, and power grids, making the study of these phenomena a key element in the resilience of modern infrastructure.
This is the context of the SMILE mission. Its goal is to simultaneously study the behavior of the solar wind, the magnetosphere, and the ionosphere to better understand how energy is transferred between the Sun and Earth and how space weather phenomena are generated.
The mission will combine X-ray and ultraviolet observations to analyze the interaction between the solar wind and Earth’s environment, as well as continuously monitor auroral activity in polar regions. All this data will contribute to improving the understanding and forecasting of high-intensity solar events.
A deeper understanding of the Sun–Earth relationship will enable better prediction of the space environment that influences much of today’s technology, enhancing our ability to anticipate severe space weather events.
CT’s participation in SMILE reinforces the capability of Spanish engineering to contribute to world-class critical space systems. Through projects like this, CT continues to invest in the space sector and in the development of engineering capabilities within the European aerospace ecosystem.