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Maritime Systems

Coastal Surveillance and EEZ Security Monitoring

We supply complete sensor systems for short range and long range coastal surveillance radar for the detection of very small and large sea surface targets particularly in poor weather conditions. In fact, we have achieved a certain status as being a leading specialist supplier of long range sea surveillance radars, with a current list of coastal radars in some 15 countries worldwide. Many of these are dual purpose, with long range VTS application coupled with security or law enforcement. Some are solely for security or law enforcement within the EEZ.

Easat has a particular method of optimising radar performance in monsoon or other very high rainfall regions. This is the use of separate X and S band transmitters operating through the same dual-feed antenna. In heavy rainfall for example +10 mm/hour, the S band performance is only marginally affected, whereas even with the techniques of frequency diversity and circular polarisation, longer range X band performance ultimately collapses. Easat is currently the only company offering this dual band costal surveillance equipment on a COTS basis.

 Coastal Radar Solutions

Suitable high performance commercial antennas applicable for coastal radar surveillance:



Coastal Surveillance

(click photo to enlarge)

Detection of small targets is good weather in itself is not challenging but in poor weather (heavy rainfall and rough seas) the situation changes dramatically. In these conditions radar detection of small targets requires very high gain antennas with narrow beamwidth to reduce rainfall and sea clutter return. Additional features of Easat radar antennas include the ability of polarisation switching in X band to improved performance in heavy rainfall, frequency diversity and a combined dual X and S band antenna for the most demanding weather conditions.

Typically radar targets may be 1m2 or 2m2 Radar Cross Section, such as Rigid Inflatable Boats, wooden or glass fibre fishing boats or high speed launches. These targets are detected and tracked simultaneously with the largest of maritime targets, based on achieving the maximum available dynamic range. For these reasons, Easat radar sensor systems generally provide better detection performance particularly in adverse weather conditions.