The team of engineers at the Communications and GPS Navigation Program Office mounted a small antenna system (SAS) and antenna electronics (AE) along with a Defense Advanced GPS Receiver (DAGR), representing a Selective Availability Anti-spoofing Module (SAASM)-capable GPS receiver on the UAV. The UAV was then placed in a room, lined with signal-absorbent material, where it was subjected to GPS jamming signals. These signals simulated both the GPS satellite constellation signals as well as multiple GPS jammers. Engineers believe that the tests have shown encouraging results. These initial tests were done while the UAV was in a fixed position. Dynamic air tests are planned later this month.