Arinc has flight tested a new differential-GPS precision approach and landing system designed to withstand electronic jamming. Conducted on April 5 at Holloman Air Force Base in New Mexico in an Air Force C-12J (the military version of the Beech 1900C), the tests evaluated the performance of Arinc’s developmental local-area differential GPS (LDGPS) landing aid.
The landing system uses multiple jam-resistant GPS receivers on the ground and a single anti-jam GPS receiver in the aircraft to provide accurate differential GPS position. The aircraft receives GPS corrections from the ground over a VHF datalink designed to provide guaranteed vertical accuracy for Category II approaches of 5.3 meters, even when subjected to jamming. The C-12J made several precision approaches while electronic jamming was activated, and all tests were described as successful.