JMA-254
Description of the radar set, tactical-technical characteristics
| Specifications | |
|---|---|
| frequency: | 2.7 … 2.9 GHz
(S-Band) |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | 250 … 1 200 Hz |
| pulsewidth (τ): | 1; 2; 50 or 100 µs |
| receiving time: | |
| dead time: | |
| peak power: | 10 kW |
| average power: | ≤ 1 kW |
| instrumented range: | 450 km (@23 dBZ) |
| range resolution: | |
| accuracy: | |
| beamwidth: | ≤ 1.7° |
| hits per scan: | |
| antenna rotation: | 0 … 6 rpm |
| MTBCF: | |
| MTTR: | |
JMA-254
The JMA-254 is operating in the S-Band, only semiconductor-based precipitation radar manufactured by Japan Radio Corporation. Due to its long-range and lower attenuation in the S-Band, the radar can detect dangerous weather events far out in the ocean before they hit the mainland.
It uses a symmetrical parabolic antenna with a diameter of about 5 m and linear-horizontal polarization. The multi-channel digital receiver has a sensitivity of −110 dBm.
The radar was developed in 2011. It was the World’s first S-band solid-state weather radar.
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