TRISAT-S

TRISAT-S [University of Maribor]

TRISAT-S is a Slovenian scientific and educational 3U CubeSat mission led by the University of Maribor in cooperation with SkyLabs, Slovenia.

The mission focuses on technology demonstration, scientific research, and education, with particular relevance for future long-duration and deep-space missions. Its primary objective is the validation of spacecraft subsystems that enable extended autonomous operation with minimal energy availability.

A central mission goal is the demonstration of advanced battery hibernation capabilities. TRISAT-S evaluates the performance of primary batteries with exceptionally low self-discharge and rapid voltage recovery following prolonged orbital dormancy. Continuous in-orbit measurements are used to assess battery chemistry behavior, radiation-induced degradation, and long-term lifetime characteristics. These data support improved prediction models for spacecraft energy storage systems intended for long inactive phases.

A second major objective is the demonstration of ultra-miniaturized, imaging-based navigation. The satellite carries a next-generation, ultra-low-power visual system designed to provide full-field situational awareness. The system supports attitude and orbit determination and serves as a precursor for autonomous navigation in orbital and deep-space environments where conventional navigation aids are unavailable or unreliable.

The satellite was initiated by the University of Maribor, which leads the mission concept, system design, and scientific objectives. SkyLabs contributes industrial expertise, satellite engineering, and integration. The mission emphasizes the use of highly integrated, low-power electronics, autonomous timing and control elements, and miniaturized optical systems suitable for small satellite platforms.

TRISAT-S incorporates an ultra-low-power timing element that autonomously schedules wake-up cycles during hibernation. This enables precise energy budgeting and minimizes unnecessary power consumption. The onboard measurement architecture supports continuous monitoring of battery parameters, environmental influences, and system health over extended periods.

The imaging subsystem is optimized for minimal mass, volume, and power consumption while providing sufficient resolution and field of view for navigation-related processing. Together with the power subsystem, it forms an integrated demonstration of energy-autonomous operation and vision-based spacecraft awareness.