Abstract
The capabilities of CubeSats have grown significantly since the first of these small satellites was launched in the early 2000s. These capabilities enable a wide range of mission profiles, with CubeSats emerging as viable platforms for certain space-based astronomical research applications. The Educational Irish Research Satellite (EIRSAT-1) is a CubeSat being developed by a student-led team as part of the European Space Agency’s Fly Your Satellite! programme. In addition to its educational aims, the mission is driven by several scientific and technological goals, including a novel gamma-ray instrument for the detection of bright transient astrophysical sources such as gamma-ray bursts. This work provides a detailed description of the software development lifecycle for EIRSAT-1, addressing the design, development and testing of robust flight software, aspects of payload interfacing, and risk mitigation. A design-to-testing approach has been implemented in order to establish, prior to launch, that EIRSAT-1 can perform its intended mission. Constraints and challenges typically experienced by CubeSat teams, which can impact the likelihood of mission success, have been considered throughout and lessons learned are discussed. The aim of this work is to highlight the advanced capabilities of CubeSats while also providing a useful resource for other university-based teams implementing their own flight software.
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