SAASM Integrated System Evaluator and Reporter

Increasing numbers of military integrated platforms and weapon systems are completing a GPS receiver upgrade to the Selective Availability Anti-Spoofing Module (SAASM) as mandated by CJCSI 6140. SAASM GPS receivers provide the next generation security architecture. Once fully operational, this architecture will provide the new capabilities of unclassified black keys, multiple user networks and extended GPS functions such as over-the-air-rekeying (OTAR), contingency recovery and signal authentication. The functions will largely be implemented through the satellite signals themselves. However, the on-orbit signals are not yet available. While qualified at the card level, these integrated navigation and weapon systems equipped with SAASM receivers could not be fully exercised at the operational system level to verify their overall integrated functionality. In order to fill this testing gap and gain the ability to check out the SAASM functionality of a fully integrated weapon system, the 746th Test Squadron (746 TS) developed a mobile simulation asset that provides the necessary set of simulated SAASM test signals. These specialized signals can be fed to an unmodified, operationally-configured platform running on its own power without removing black boxes in order to exercise the SAASM functions while the platform is in the operational state. The asset is called the SAASM Integrated System Evaluator and Reporter (SAASM-ISER). The 746 TS has recently added GPS receiver autonomous integrity monitoring (RAIM) functionality testing to this capability as well. This presentation will describe SAASM-ISER, what it can do and how it has been used.