Robust and Reconfigurable On-Board Data Handling Subsystem for Present and Future Brazilian CubeSat Missions

TL;DR

The paper addresses the need for robust and reusable on-board data handling (OBDH) in Brazilian CubeSats operating in harsh radiation environments. It introduces the Demoiselle OBC, a modular, radiation-tolerant APSoC-based platform, coupled with a multimission flight software stack that supports OTA updates and layered security. Validation is planned via ITASAT2 and SelenITA, with detailed attention to fault tolerance, lifecycle testing, and long-term adaptability. The work aims to deliver a flexible, scalable OBDH foundation enabling long-term reliability and easier integration of future technologies across Brazilian CubeSat missions.

Abstract

CubeSats require robust OBDH solutions in harsh environments. The Demoiselle OBC, featuring a radiation-tolerant APSoC and layered FSW, supports reuse, in-orbit updates, and secure operations. To be validated through ITASAT2 and SelenITA, it ensures fault tolerance, flexibility, and compatibility with emerging technologies. This architecture establishes a foundation for long-lasting, scalable OBDH systems in future Brazilian CubeSat missions, ensuring long-term reliability and adaptability.

Figures (12)

• Figure 1: (a) Linear Energy Transfer (LET) spectra, and (b) Total Ionizing Dose (TID) as a function of Al shielding thickness.
• Figure 2: Requirements flow down for the OBDH subsystem.
• Figure 3: High-level architecture of the Demoiselle OBC.
• Figure 4: 3D renders of the Demoiselle OBC, showing its three boards.
• Figure 5: Component breakdown of the Demoiselle OBC processing board.