The ILS localizer and glideslope signals are received and processed through the same antennas and receiver as the ______ system.

The ILS (Instrument Landing System) localizer and glideslope signals are indeed received and processed through the same antennas and receiver as the VOR (VHF Omnidirectional Range) system. This is because the localizer, which provides lateral guidance, and the glideslope, which provides vertical guidance for an aircraft approaching a runway, utilize VHF frequencies that are compatible with the equipment used for VOR navigation.

The VOR system is designed to help aircraft determine their position and maintain their course, using similar VHF antennas and operational principles as those found in the ILS. This shared architecture allows for more efficient use of ground facilities and simplifies the design of navigation equipment in aircraft.

Other systems like DME (Distance Measuring Equipment), NDB (Non-Directional Beacon), and ADF (Automatic Direction Finder) operate using different technology and frequency bands that do not coincide with the VOR/IHS infrastructure. Thus, they are not processed through the same antennas and receivers, highlighting why the VOR is the correct reference point for this question.