EIRSAT-1

The first payload element (called the ‘Gamma-ray Module’ or ‘GMOD’) is a miniaturised sensor for use in the detection of gamma-rays from both cosmic and atmospheric phenomena.[8] The sensor is called a silicon photomultiplier (SiPM) and has been developed by SensL Ltd. in Co. Cork (currently part of ON Semiconductor). The SiPM has the potential to revolutionise in-situ and remote sensing of gamma-rays in space by removing the need for conventional photomultiplier tubes that are typically very bulky, fragile and require high voltages to operate.[2]

The second payload element (called the ‘ENBIO Module’ or ‘EMOD’)[8] will provide in-orbit demonstration of novel protective oxide surface treatments made by ENBIO Ltd. (SolarWhite and SolarBlack).[1][2] These surface treatments have been developed for use on the ESA Solar Orbiter mission, and EIRSAT-1 will provide the opportunity for these coatings to be thermally tested. The temperature of the coatings will be measured throughout the mission.[2]

The third payload, recently added, is a novel attitude control system developed by the Dynamics and Control Group in the UCD School of Mechanical and Materials Engineering. A spacecraft's “attitude” is its orientation in space. In this case it will use the Earth's magnetic field to turn itself in any desired direction.[1] The UCD control technique is called “Wave-Based Control” (WBC).[8] EIRSAT-1 will use a standard control system initially. At some time into the mission, in response to an instruction from Earth, the on-board computer will start using WBC to control the satellite's attitude, thereby evaluating its performance and, it is hoped, qualifying WBC for space flight.[2]