RAN-30X alias MM/SPS-791 (MM stands for Marina Militare, a nomenclature for the Italian Navy, similar to the US-Army/Navy’s nomenclature AN/…) is a 2D shipborne multimode surveillance radar operating in X-Band. It can operate as a primary sensor for combined surface and air surveillance on board patrol vessels or as a specialized anti-seaskimmer sensor on board major Surface Combatant Vessels.
The antenna is mounted on a mechanical Roll and Pitch stabilised platform. The primary radar antenna is a parabolic reflector with two different beams: beam one forms a Cosecant Squared pattern, beam two (providing a higher gain) forms a Pencil-Beam applied for anti-missile detection and Over-the-Horizon mode. The antenna is designed to house the IFF antenna in a back-to-back configuration.
Shipborne Multimode Surveillance Radar
The RAN-30X surveillance radar represents the stateof-the-art of 2D X-Band surveillance radars. It can operate as a primary sensor for combined surface and air surveillance on board patrol vessels or as a specialized anti-seaskimmer sensor on board major Surface Combatant Vessels.
RAN-30X features up to 4 operational roles:
- Surface and air surveillance mode (detection and tracking of small air/surface targets)
- Navigation and helicopter control (high antenna rotation speed for navigation close to the coastline)
- Over-the-horizon (OTH) detection (low antenna rotation speed and long range detection capability)
- Anti-seaskimmer missile detection. This mode has an high antenna rotation rate to ensure the detection and tracking of very small targets manoeuvring in clutter environment and featuring very low Radar Cross Section (RCS).
Each mode is designed with a proper set of transmitted waveforms. The reflector antenna performs two different beams (in linear and circular polarisation) to cope with different applications:
- The first beam is a cosecant square one (up to 25°- beam width of elevation coverage) used in Surveillance and Heli modes
- The second beam (providing a higher gain ) is a pencil beam one, applied for anti-missile detection and Over-the-Horizon mode.
The antenna is designed to house the IFF antenna in a back-to-back configuration.
RAN-30X receiver is designed to provide a very high linearity and sophisticated processing. It employs triple conversion with a carrier sample technique. An automatic and adaptive STC algorithm is implemented against the returns from clutters and wide target radar cross sections.
A different detection and data extraction logic is used to extract surface and air target at plot level. Target identification is confirmed by means of automatic tracker algorithm (at track level). A set of tracking filter parameters and logics is used in each mode, for Air and Surface Targets.
The RAN-30X command control and extended bite is fully remoteable. The new architecture provides the RAN-30X with a higher flexibility in comparison to the normal radar equipment. It can be fully integrated with different ship platforms and Command and Control Systems (point-to-point serial link, FDDI or Ethernet ship data).
- Size Antenna: 2400x2300mm
- Weight antenna: 600 kg
- Size transmiter: 1815 x 700 x 694mm
- Weight transmiter: 294 kg
- >100km air/surface surveillance
- >40km navigation and heli control
- >200km over-the-horizon surface
- >25km anti-missile
- Targets simultaneously tracked:
- Band: X band
- Pulse repetition frequency: Automatic frequency selection
- Scan rate (scan/min): 30 r.p.m