3-coordinate Coastal Radar with Multi-beam Active Phased Array (COAST-APA)

Radar purpose : COAST-APA radar is designed for air and surface surveillance, and can be used both stand-alone and as the part of an integrated system of coastal surveillance. Performs automatic detection, track initiation and tracking of air targets at high, medium and low altitudes and surface targets under heavy interference conditions. It provides continuously updated data for the azimuth, elevation and range. Space surveillance using multi-beam radiation pattern provides maximum values ​​of elevation in the field of view, high-speed data update of the targets coordinates and effective operation under difficult interference conditions.  It can be performed in a stationary or mobile variants.   .  .

TECHNICAL CHARACTERISTICS 1. Frequency band C-band (NATO G-band) 2. Elevation coverage up to 60° (depending on operational mode) 3. Altitude coverage up to 20 km 4. Operational modes: - Ultra-Long-Range mode instrumental range up to 180 km Long-Range mode instrumental range up to 128 km Medium-Range mode instrumental range up to 64 km - Short-Range mode instrumental range up to 32 km 5. Rotation speed 12; 30 r.p.m. 6. Beam width (at -3dB): - Vertical (elevation) θε 6° - Horizontal θβ 1.5° 7. RMS tracking error - in range < 15 m - in bearing < 2.5 mrad - in elevation < 7 mrad 8. Maximum number of tracked targets ≥ 200

Typical Detection Ranges interference-free conditions Operational modes Antenna rotation time RCS Detection range , km interference-free conditions PD =0.5; PF = 10-6 Long-Range 5 sec. fighter σ = 2 m2 90 bomber σ = 10 m2 120 surface target (cruiser) Radio horizon under normal refraction; 100 km under superrefraction Medium-Range 2 sec. missile σ = 0,05 m2 18 70 surface target (corvette) 0.8 Radio horizon Radio horizon under normal refraction Short-Range 16 50

Radar technical capabilities : Digital generation of multi-beam radiation pattern.   Automatic detection and tracking (track-while scan): - air and surface targets; - fast supersonic missiles; - small-size high-speed surface targets in strong sea clutter. A high rate of reaction for the detection of dangerous targets.   Effective suppression of interference from the sea, rain, underlying surface and dipoles.  Adapting of surveillance modes to different target and noise conditions.   Doppler filters set for suppressing clutter from the sea surface, hydrometeors and dipoles.  Separate processing channels for air and surface targets with adaptive detection thresholds. High resistance to electronic jamming.   Detection of bursts on the sea from the projectile breaks.  Built-in control equipment. Friend or foe recognition of the detected targets.

Radar configuration Active Phase Array Antenna IFF antenna with digital beamformer, signal and data processor IFF antenna Antenna servo unit with slip- ring and rotary joint Operating console (option) Power supplies unit Control unit Radar configuration Diesel-generator

Comparative specifications of air and surface surveillance radars RI «Kvant» COAST-APA Saab Sea Giraffe AMB Bandwidth (NATO) G Band Instrumented range 16/32/64/128/180 km 30/60/100/180 km Elevation coverage 16/30/60° 70° Beamwidtn (Az-El) 1.6°- 5.7° 2°- 7° Accuracy (Az-El) 0,15°-0,4° 0,2°- 0,6° Receiving pattern in elevation Multi-beam with digital beamforming Number of beams Up to 12 Up to 4 Transmitter type Transistor power amplifier in each of phased array rows TWT Antenna weight/ other devices weight 850 kg/ 280 kg 660 kg / 1270 kg Consumed power 10 kVA 35 kVA