An open-array radar system with pulse compression technology
Navico Commercial Marine Division has launched Simrad HALOTM Pulse Compression Radar , a solid-state, open-array radar system with pulse compression technology for non-SOLAS applications aboard commercial vessels.
HALO radar detects targets as close as 20 feet (6 metres) -well within pulse radar’s short-range ‘blind spot’ – while delivering exceptional long-range performance up to 72 nautical miles.The significance of the ‘solid-state’ transceiver is that no magnetron is called for, and therefore no manual tuning required as the magnetron heats up or ages. Not having to rely on a magnetron to transmit a signal also allows the radar to resume full operation instantly from standby and in just 16-25 seconds from powered-off – avoiding the two- to three-minute warm-up time associated with traditional pulse radar systems.
HALO radar also transmits a blend of short-through-long ‘CHIRPs’ in 500-2,800 bursts per second to cover a full radar range. Pulse compression technology delivers a mix of close and long-range detection, precise target definition, and low clutter. Under most circumstances, HALO has the ability to detect and track targets within 3m of the host vessel. It uses Digital Sidelobe Reduction and Directional Sea Clutter Rejection to enhance the detection and discrimination of smaller targets, while Sector Blanking eliminates unwanted reflections for less clutter on screen and delivers an easily understandable screen view.
“By introducing the new radar, even the smallest fleets can take advantage of the comprehensive features, with a perfect mix of near and distant range, reliability and resolution without the associated warm-up time, power consumption, costly maintenance or harmful emissions.”says Jose Herrero, MD Commercial Marine Division,
A combined radar data image of the multiple pulses is merged using high speed digital signal processing software and sent to the multi-functional display. HALO radar provides Beam Sharpening for enhanced target separation control. In Dual Range mode, HALO functions as two radars in one -monitoring two distance ranges simultaneously with independent displays, controls, target tracking and MARPA (mini-automatic radar plotting aid) target tracking.
MARPA target tracking, combined with HALO radar’s close-range performance and target separation, gives operators the ability to track commercial and smaller recreational craft at close range in busy harbours, ports, and unfamiliar waters. HALO radar is also radiation safe to people within the swing circle of the array on all models. According to Navico, this makes it the ideal choice for non-SOLAS passenger vessels and smaller workboats, safe to mount almost anywhere on board and safe to operate close to passengers and crew.
Source: Navico
