Precision approach radar

The aircraft position is then displayed on a high-resolution color graphics terminal that also shows the approach centerline and the glide path.

The signal strength for the secondary surveillance radar subsystem of a non-traditional PAR is not attenuated by rain since the frequency is within the long range band, L-band.

Therefore, a non-traditional PAR does not experience noticeable rain fade and in the case of the TLS has an operational range of 60 nm.

A traditional PAR flight inspection procedure is performed without a navigation signal available to compare directly to a truth reference.

The Transponder Landing System (TLS) non-traditional PAR can transmit an ILS signal that corresponds to the aircraft position relative to the precision approach.

Precision approach radar PAR-80 on a military airfield in Germany
An Air Force air traffic controller is reflected in the precision approach radar scope (1980)
AN/TPN-12 GCA/PAR