Enhanced Airborne Interference Monitoring
Detection System (AMIDS)

System Description

The AIMDS is composed of commercially of-the-shelf (COTS) components used for performing direction finding work in the VHF communications spectrum. The enhancement of the AMIDS will upgrade the existing VHF airborne detection system to add the capability to cover the L1, L2 and L5 GPS frequencies. These enhancements are to be implemented on to the FAA Aviation Systems Standards flight inspection fleet of 33 aircraft. It mainly involves the addition of a specially designed conformal external direction finding antenna for GPS spectrum. Processing of the interfering signal will be accomplished with the equipment already on the aircraft used for VHF direction finding. These flight

inspection aircraft are normally dispersed throughout the National Airspace System (NAS) conducting scheduled inspection of navigational aids and can be diverted with approval of the FAA National Operations Control Center (NOCC), based on a priority evaluation, to locate interfering signals.

New Production/Delivery Status:

33 AIMDS enhancements are required, 1 for each Aviation Systems Standards aircraft conducting flight inspections in the NAS. One AIMDS enhanced for GPS is in-service. 32 COTS GPS direction finding antennas need to be procured.