i2CAT joins forces with Airbus GeoTech and GPA Innova to pioneer the next generation of HAPS payloads

Airbus GeoTech is spearheading the innovative STRATOSENS project, an initiative designed to revolutionise the capabilities of High Altitude Platform Systems (HAPS) for permanent observation & surveillance by developing cutting-edge payload technologies that enhance the functionality, efficiency, and sustainability of these platforms. The project is backed by a robust consortium that includes GPA Innova, Power Innotech, GPA Space, the Institute of Space Studies of Catalonia, the i2CAT Research Centre, ASE Optics Europe, Leitat Technological Centre, and the University of Vigo, and is funded under the PERTE Aerospace program, managed by CDTI Innovación – Centro para el Desarrollo Tecnológico y la Innovación. 

The STRATOSENS project aims to advance Earth observation capabilities through the development of next-generation payloads. These include prototypes designed to operate with precision and high performance, enabling continuous observation 24/7. With intelligent imaging algorithms and scalable, eco-friendly architectures, the project envisions HAPS as transformative tools capable of offering flexible and high-resolution coverage while maintaining a sustainable operational footprint.

The i2CAT Research Centre plays a pivotal role in addressing one of the project’s challenges: optimising the transmission of the massive volumes of data generated onboard the HAPS. i2CAT’s contributions focus on two complementary strategies. First, the development of intelligent data filtering mechanisms using pre-trained neural networks (NNs). These networks, embedded in resource-efficient hardware such as Software-Defined Radios (SDR), selectively transmit only the most relevant and useful data, thereby significantly reducing bandwidth usage. This innovative approach combines the efficiency of on-ground training with lightweight real-time operation, ensuring minimal resource consumption.

Secondly, i2CAT is enhancing the connectivity of HAPS by facilitating integration with satellite communications technologies. Through detailed analyses of technical requirements and interface architectures, the centre is producing a preliminary design for a communications subsystem that leverages existing satellite constellations to amplify the data downlink capacity of HAPS.

HAPS are increasingly recognised for their potential as agile, high-altitude observation platforms. Offering high-resolution imaging and flexible, on-demand coverage, these systems bridge the gap between traditional satellites and ground-based sensors. However, their effectiveness has been limited by the challenge of transmitting the vast data they generate. STRATOSENS addresses this bottleneck through groundbreaking innovations in data management and connectivity, positioning HAPS as a cornerstone of future Earth observation strategies.