Spirent, Fraunhofer IIS and LZE GmbH are working together to ensure continuity of supply of PRS simulation tools and ensure continuity of supply of Spirent's leading Galileo PRS product extension for radio frequency constellation simulators (RFCS). prs[ware] is a software add-on package that enables a Spirent GSS9000 to produce the Galileo PRS service and "rated features".