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EWIS II

Description of the radar set, tactical-technical characteristics

Figure 1: EWIS II

Figure 1: EWIS II

Specifications
frequency: 5.61 GHz
(C-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 250, 900 or 1200 Hz
pulsewidth (τ): 0.58 or 2.0 µs
receive time:
dead time:
peak power: 250 kW
average power:
instrumented range: 480 km
range resolution:
accuracy:
beamwidth: 0.9°
hits per scan:
antenna rotation: 1 … 6 min⁻¹
MTBCF:
MTTR:

EWIS II

EWIS Ⅱ is operating in C-Band weather radar.

It uses a magnetron-transmitter and an analog receiver. The polarization is oriented linear horizontal. A reflectivity volume scan contains 12 elevation angles (typical: 0.5°, 0.9°, 1.3°, 2.4°, 3.5°, 4.5°, 6.0°, 8.0°, 10.0°, 15.0°, 25.0° & 40.0°). Doppler scans contain 9 elevation angles (typical: 0.5°, 1.3°, 2.4°, 5.0°, 7.0°, 10.0°, 15.0°, 20.0° & 30.0°). The complete volume scan needs 15 minutes.

The first installations were in the late 1980's as a conventional Non-Doppler Radar. A modernisation changed the classification to Doppler-Radar in 2010 (since then the name EWIS Ⅱ). The radar is operational in Island near the airport Keflavík. It is located about 257 km from the Grímsvötn volcano, and 153 km from the Eyjafjallajökull volcano.