Princeton Satellite Systems, Inc. (PSS) is a small company specializing in aerospace control and simulation technology. The firm is focused on technology for electricity backup, electric vehicle charging, fusion propulsion, lighter-than-air-vehicles, solar sails, spacecraft formation flying, launch vehicles and spacecraft control and navigation. PSS Energy Systems encompasses both terrestrial and space energy production applications, including home solar/battery backup systems and fusion propulsion. The firm offers a set of software solutions to the aerospace industry such as he Spacecraft Control Toolbox, Aircraft Control Toolbox, and Core Control Toolbox, along with a set of Add-On Modules for special applications like Imaging and MHT.