ESA pushes forward with optical technology for future navigation
by Erica Marchand
Paris, France (SPX) Feb 12, 2025
The European Space Agency (ESA) is making moves to incorporate optical technology into navigation systems. They’ve teamed up with a European industry consortium to kick off a study and prepare for new tech development.
This project is the first step toward an ambitious in-orbit demonstration called Optical Time Synchronisation and Ranging (OpSTAR). It’s set to be discussed at a major ESA meeting in November 2025, aiming to test new optical links between satellites, a vital advance for future navigation networks.
ESA is committed to keeping Europe at the leading edge of satellite navigation through its FutureNAV program. This program encourages fresh ideas in space-based positioning, navigation, and timing (PNT) solutions, helping Europe maintain its leadership in this essential field. A key feature of FutureNAV is the in-orbit demonstration, providing a platform for emerging technologies in navigation.
Optical technology could boost navigation systems’ accuracy and reliability. Using laser beams instead of traditional radio signals, intersatellite optical links are already common in satellite communications. However, they need further refinement and testing for use in navigation systems.
ESA has enlisted a consortium led by OHB System from Germany for the concept study and preliminary tech development. This effort involves 33 companies from different ESA Member States.
After the initial study, the next step is to test these concepts in space to see if they work as intended and to explore new system designs. The insights gained will help figure out how to blend optical technology into future navigation systems.
Javier Benedicto, the ESA Director of Navigation, expressed excitement about starting this project, especially with the upcoming ministerial meeting on the horizon. He emphasized the importance of showcasing new technologies to shape Europe’s navigation future.
Jose Angel Avila Rodriguez, ESA’s Head of Future Programmes in Navigation, noted that OpSTAR will not only prepare for the in-orbit demo but also help set international standards for optical timing and ranging in PNT. Engaging major industry players early on will strengthen Europe’s position in global navigation technology.
Why choose optical technology for navigation?
The increasing need for reliable PNT services demands better accuracy and security. Optical technology offers a promising solution, especially with intersatellite optical links. These links could help create a more independent global navigation satellite system (GNSS).
Using laser beams can lessen reliance on traditional atomic clocks and ground infrastructure, enhancing resilience against disruptions. Additionally, optical links are naturally resistant to interference, improving security.
These links also allow for faster data transfers, which is in line with ESA’s plans under the LEO-PNT initiative for a robust navigation system. This strategy aims to establish a multi-layered approach to enhance global positioning services.
The accuracy of optical systems is expected to significantly boost navigation capabilities. With the potential for millimeter-level precision and picosecond-level timing, these developments promise better services for billions of users around the globe.
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