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Testing of the Battlefield Airborne Communications Node (BACN) is continuing forward. During the month of February, Bombardier Global Express test aircraft N901GX has flown test sorties out of NAS North Island, CA in support of the program. The aircraft has been changed considerably since it was last seen in SoCal, near the end of 2007. It now appears to be outfitted in the Sentinel R1 configuration, including the lower radome, which would normally contain the Raytheon built Airborne Stand-Off Radar (ASTOR). 901GX was originally brought in to be used as a test bed for the BACN system in 2007, making its first flight with the equipment onboard in August of that year.
In January 2007, NASA's WB-57 #926 flew numerous test missions into the Edwards AFB range in support of BACN, while being based out of March ARB. NASA 926 was the first aircraft to have BACN technology installed, and it has been utilized in the program on and off since the beginning. The BACN system is designed to be used at high altitudes, which makes the high flying WB-57 a good choice for a flight test bed. 926 had flown earlier BACN test missions from MCAS Miramar in 2007, and it now wears numerous stickers from the various Miramar squadrons on it's nose.