RADius
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High precision position reference and tracking system. RADius is developed for applications in need for a robust and reliable relative positioning system. Many applica- tions can benefit from RADius in operations, as there are different types of retroreflective transponders, and different types of installation of the sensor heads, Innovative technology The implementation is fully solid state and based on measurement of reflected radar signals from a number of passive transponders in the nearby area. Each reflected signal is mixed with a unique ID to separate differ- ent targets from each other. Advanced signal processing allows simultaneous and continuous measurements to any practical number of transponders. RADius is designed for multiple users leveraging the same transponders Multiple sensor heads RADius can be deployed as an omni directional system utilis- ing four sensor heads, which can be placed on suitable locations on the vessel dependent on the construction and operation. This provides full 360° signal acquisition as well as avoidance of blind angles as there will be a sensor head at a receiving angle to trans- ponders at all times, regardless of the vessels relative position to Signal processing will effectively remove possible interference with other transmitting devices in the same frequency band. Accurate Doppler measurements allow for rapid and reliable determination of relative velocities between the maneuvering Application software makes configuration and moni- toring of the RADius operation easy and effec- tive, and interfaces to remote systems like Dynamic Position may either be serial lines or Ethernet based. RADius is designed to fill the need specified by DVIO for DP Operational features RADius is capable of detecting and measuring accurate range and bearing to any transponder within the range of up to 550 metres. (Dependant on the targets transponders) The direction from the interrogator to each transponder is accurately determined by the use of interferometric methods. Due to use of open standards, deployment of the operator interface is very flexible. Wide opening angles RADius has a vertical and horizontal opening angle of 90° This secure stabile operations in close by operations where the difference in mounted transponder and interrogator can be considerable. Due to this there is not necessary to tilt the sensor head in any direction to obtain signal. Retroreflective transponders are mounted on the target that are to be approached. A variety of transponders are avail- able suitable for any operation that demands an robust and reliable relative positioning solution. • Multiple sensor heads • Measuring and output of range and bearing • Wide opening angles secure close-by operations • Multi user feasibility • Multiple transponder capability • Operates in all weather conditions, also extreme cold • Complementary to existing GPS reference system • Designed to meet all IMO DP Class requirements • Both battery and fixed power operated transponders • Operates in license free radio band • ATEX certified transponders • Easy to deploy and adapt

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System Configuration System Components The interrogator is mounted on the outside of the vessel. It contains antenna elements, a transmitter and a signal processing front end. • RADius Workstation The workstation contains RADius Processing unit, a graphical user interface and serial interface. The System is delivered in a 6U 19" rack with keyboard, video display unit and power/ connection module. There are both high-gain and low power (battery operated) transponders available. ATEX certified intrinsically safe transponders in low-power (battery operated) and high gain versions. • User...

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