A major step forward in satellite navigation and space instrumentation has begun with the launch of an ambitious research project led by Dr. Moisés Garín from Universitat de Vic (UVic). This innovative initiative, funded by ESA’s Discovery Programme through the EISI implementation mechanism, is being developed by a consortium including UVic, the Universitat Politècnica de Catalunya (UPC), and the Spanish National Institute of Aerospace Technology (INTA). Adding further expertise to the team, Dr. Sandra Bermejo from UPC has officially joined the project, bringing her extensive knowledge in optics and photonics.

The Science Behind Sun Sensors Sun sensors are essential devices in satellite systems, enabling precise attitude determination by measuring the sun’s position relative to the spacecraft. Traditional sun sensors utilize the ray-nature of light, requiring apertures and specific plane orientations to cast shadows onto photodetectors for positional estimation.

In contrast, this groundbreaking project aims to revolutionize sun sensor technology by leveraging the wave-nature of light. This novel approach eliminates the necessity for apertures and precise positioning, resulting in a fully integrable and compact solution ideal for small satellite (smallsat) applications.

Project Goals and Development Under the supervision of Prof. Dr. Moisés Garín and with the expertise of Dr. Sandra Bermejo, the research team is focusing on developing interference filters and grating structures, which are central to this new sensor design. The tasks undertaken in this project include:

• Design and Simulation: The team will explore advanced computational models to optimize interference filter and grating structures, ensuring maximum efficiency in detecting sunlight based on wave interference principles.
• Fabrication and Characterization: The fabrication process will take place in UPC’s state-of-the-art cleanroom laboratories, where the designed structures will be meticulously crafted and tested for performance accuracy.
• Integration into Smallsats: Given the increasing use of smallsats in space exploration and Earth observation, this technology is being tailored for seamless integration into these compact systems.

A Unique Learning Opportunity This project presents an exceptional learning experience for predoctoral students engaged in cutting-edge optics and photonics research. By working on both theoretical and practical aspects—ranging from simulation to real-world fabrication—they gain valuable insights into space technology development.

Contact Information For further details or potential collaboration, please contact:

• Prof. Dr. Moisés Garín (moises.garin@uvic.cat)
• Dr. Sandra Bermejo (sandra.bermejo@upc.edu)

With this new collaboration, the project is set to make significant strides in the evolution of sun sensor technology. Backed by ESA’s Discovery Programme and the combined expertise of UVic, UPC, and INTA, the future of space navigation and smallsat technology looks brighter than ever.