High Altitude Platform Stations (HAPS) are aerial platforms, typically unmanned aircraft or airships, that operate in the stratosphere. These platforms are designed to provide a range of services, including telecommunications, surveillance, and environmental monitoring, from high altitudes above conventional aircraft and below satellites. HAPS can stay aloft for extended periods, often powered by solar energy, and offer a cost-effective and flexible alternative to satellite systems, particularly useful for areas lacking ground infrastructure.