Open Sandwich Structures (OSS) are a new type of free form and full design oriented structural panel technology for the construction of low Earth orbiting (LEO) satellites (mega constellations). Unlike the three constituent (sheet/core/sheet) type of sandwich panels, OSS encompasses a panel structure made of only two material sheets without any addition of core material. Compared to current closed cell panel technology, that leads to reduced material costs, a much simpler production process and a higher productivity for space structures