Description of the radar set, tactical-technical characteristics
Figure 1: AN/FPS-28
|frequency:||410 … 690 MHz
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AN/FPS-28 was operating in UHF-Band long-range surveillance radar. It was developed by Raytheon as part of the Frequency Diversity Radar program, a major radar developmental project undertaken at RADC (Rome Air Development Center, Griffiss Air Force Base, Rome, NY). The radar was designed to succeed existing Semi-Automatic Ground Environment (SAGE) radar systems, which had served as the backbone of US-American air defense. It was a prototype only installed at Houma Naval Air Station, Louisiana, put in operation in late 1959. The AN/FPS-28 was deactivated in May 1965.
The AN/FPS-28 used a special form of antenna weighing 50 tons. The antenna was installed on a three-storey tower with a height of 31.2 m, which accommodated 262 separate receiving and transmitting modules. The transmitters were power amplifier type using amplitrons as finally stages whose pre-amplifiers were traveling wave tubes. The waveform was pulse-coded intra-pulse modulated. The receivers were fitted with sophisticated anti-jam circuits in order to provide enhanced electronic counter countermeasures (ECCM) capability.