Description of the radar set, tactical-technical characteristics
|frequency:||2 775 … 2 900 MHz
|9 000 … 9 180 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):||1 200 Hz||2 400 Hz|
|pulsewidth (τ):||0.8 µs||0.5 µs|
|peak power:||500 kW||25 kW|
|instrumented range:||50 NM (≙ 92 km)||10 NM (≙ 19 km)|
|beamwidth:||2.2°||β= 57' ;ε= 33'|
|hits per scan:|
|antenna rotation:||15 and 30 min-1|
AN/FPN-28 and AN/FPN-28A are ground-controlled approach radar systems consisting of a search and a precision systems.
The search radar system operates in S-Band. It is designed to detect aircraft up to a maximum range of 50 miles and furnish precise information for directing the movement of the aircraft in azimuth to a predetermined point in space. From this point, the aircraft can be directed along a predetermined glide path to a point within 50 feet above an airport runway through the facilities of the precision system of the radar set.
The precision approach radar operates in X-Band. It is designed to provide precise information for directing the movement of aircraft in azimuth and elevation along a predetermined glide path to a point above an airport runway from which a landing can be completed under normal visual means and under all conditions approaching minimum visibility.
- MIL-HDBK-162A, 15 December 1965, Volume 1, Section 1, p.66 (online)