Officials of the Naval Sea Systems Command in Washington announced a $21.5 million order to DRS Laurel last week to build five AN/SPQ-9B ASMD radar systems and related equipment.
This order is part of a contract with options that could bring its cumulative value to $263 million to provide radar systems for the U.S. Navy and the government of Japan. Last May the Navy awarded DRS Laurel a $64.3 million contract to build as many as 59 AN/SPQ-9B radar systems.
This order is for five AN/SPQ-9B radar systems; five combat interface kits; three digital signal processor upgrade kits; and three periscope-detection and -discrimination upgrade kits.
The AN/SPQ-9B is an X-Band pulse-Doppler frequency-agile radar that scans out to the horizon and performs simultaneous and automatic air and surface target detection and tracking of low flying anti-ship cruise missiles, surface threats, low-and-slow-flying aircraft, unmanned aerial vehicles (UAVs), and helicopters.
The system is connected to shipboard missiles and machine guns for engaging incoming threats.
The radar is designed for the littoral environment in harbors and along coastlines, and has high clutter improvement factor supporting a very low false track rate in the littorals and in high-clutter environments. Its design makes the most of commercial off-the-shelf (COTS) and non-developmental item (NDI) equipment.
The unattended radar consists of four air-cooled below-deck cabinets, a motor generator, and one above-deck antenna unit designed for low-radar-cross-section reflectivity appropriate for stealth ship design.
The AN/SPQ-9B is aircraft carriers, amphibious assault ships, cruisers, Coast Guard maritime security cutters, Arleigh Burke-class destroyers, and allied cruisers and destroyers.
Above decks, the radar uses a mechanically rotating, electronically stabilized antenna. The 1,500-pound antenna consists of dual planar arrays mounted back-to-back, each connected to independent transmitters and receivers.
Below decks, the radar consists of processor, receiver/exciter, and transmitter cabinets; radar set control; and motor generator.
The processor cabinet performs signal processing, tracking, and interface functions. The receiver/exciter has three receivers, and generates system frequencies and clocks. The transmitter cabinet receives the RF pulses from the receiver/exciter and amplifies them for output to the antenna. The radar set control provides remote control and monitoring of radar operation in the ship's combat information center. The output of each receiver is converted to digital baseband I-Q data for Doppler processing in the processor cabinet. The system has an auxiliary antenna for electronic counter-countermeasures.
The AN/SPQ-9B radar has digital interfaces to the Aegis combat systems, the MK 34 gun weapon system (GWS), the MK 48 GWS, the Cooperative Engagement Capability, and ship self defense system.
On this order DRS Laurel will do the work in Johnstown, Pa., and should be finished by April 2021. For more information contact DRS Laurel Technologies online at www.leonardodrs.com/locations/drs-laurel-technologies-johnstown-pa, or Naval Sea Systems Command at www.navsea.navy.mil.
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