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RTN-30X “Orion”

Description of the radar set, tactical-technical characteristics

Figure 1: RTN-30X
© 2010 Jörg Waterstraat (www.kriegsschiffe.eu)

Figure 1: RTN-30X
© 2010 Jörg Waterstraat, (www.kriegsschiffe.eu)

frequency: I-band
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ): 0.5 or 6.5 µs
receiving time:
dead time:
peak power: 12 kW
average power:
instrumented range: 45 km
range resolution:
hits per scan:
antenna rotation:

RTN-30X “Orion”

RTN-30X alias MM/SPG-76 (MM stands for Marina Militare, a nomenclature for the Italian Navy, similar to the US-Army/Navy’s nomenclature AN/…) is operating in the I-band fire-control and missile guidance radar.

The radar uses a monopulse, cassegrain antenna with a polarisation twist and employs a fully coherent chain transmitter using a traveling wave tube as the final amplifier. Two operational modes can be selected: a long pulse mode and coded waveform with pulse compression with 13-bit Barker Code, and a short pulse mode using a keyed on/off single pulse with the length of 0.5 µs. The fully digital receiver uses a multicanceller moving target indicator and is equipped with devices to minimise the effects of multipath on low-flying targets.

The RTN-30X has many components in common with RAN-30X surveillance radar.