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AN/APS-145

Description of the radar set, tactical-technical characteristics

Figure 1: Grumman E2D with the rotodome of the AN/APS-145

Figure 1: Grumman E2D with the rotodome of the AN/APS-145

Specifications
frequency: 400 … 450 MHz
(UHF-band
pulse repetition time (PRT):
pulse repetition frequency (PRF): 300 pps
pulsewidth (τ): 13 µs
receiving time:
dead time:
peak power: 1 MW
average power:
instrumented range: 350 NM (≙ 650 km)
range resolution:
accuracy:
beamwidth:
hits per scan:
antenna rotation: 5 rpm
MTBCF:
MTTR:

AN/APS-145

AN/APS-145 is operating in the UHF-band upgraded version of the AN/APS-125 surveillance radar fitted in U.S.-built E-2C Hawkeye airborne early-warning (AEW) aircraft as well as the P-3 Orion. It utilizes a rotating antenna within a circular radome mounted atop the aircraft to simultaneously detect and track multiple threats on the sea, in the air, over land, and the critical land-sea interface.

The APS-145 uses a triple pulse repetition frequency (PRF) which prevents blind speeds during moving target indication. The processor could handle more than 600 targets simultaneously, and control more than 40 airborne intercepts.

The upgrade to AN/APS-145(V) beginning in 2003 increased the operating range by 40 percent compared to AN/FPS-138. It monitors the radio frequency environment and selects the clearest operating frequency. The radar data processor improvements made it possible to monitor, track, and display more than 2 000 tracks simultaneously. The new computers (Digital Equipment Corporation DEC 2100 with 333 MHz processors) use parallel processing to boost speed and capability, while seven-color displays present the tracks on an 11-inch flat-panel screen, a significant improvement over the old monochrome system.

This radar has already been replaced by the AN/APY-9.

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