Easat - Radar & Communications Sensor Systems & Antennas

Easat specialise in land-based and naval radar, from fixed or mobile sites. Every radar customer has a unique radar requirement, taking into consideration the nature of the site, the radar detection task, and the available budget.

By choosing the most appropriate antenna and transmitter receiver, Easat can put forward the most suitable configuration of radar sensors and associated equipment. Easat engineers have excellent experience in modelling radar performance for a variety of applications.

The radar modelling will usually commence as a desk exercise involving a specified antenna height, and an assumed set of radar, propagation and target parameters. This modelling will typically result in a probability of detection plot or radar coverage diagram, an example of which follows.

The probability of detection plot as shown above is modelled without taking account of actual terrain features which may affect the radar performance, such as large buildings, or hills.

These may cause radar shadows, which can seriously interfere with the radar performance. To evaluate such problems, and to select sites where such shadows are reduced or eliminated, site surveying “on the ground” must always be undertaken.

However, digital terrain modelling may be employed to minimise the time and cost, and sometimes the risks to personnel, of undertaking extensive site surveys in distant and sometimes hostile locations. The plot on the right shows the digital map of a coastline; the solid red colour shows the sea surface satisfactorily illuminated by the radar, whilst the in-shore shadows from hills lying between the radar site and the sea are clearly shown (lilac).

Easat will generally undertake, free of charge, the modelling of radar detection from a proposed site having a known height, as an aid to the correct specification of the radar sensor. Physical site surveys, and the combining of radar detection performance with digital terrain modelling, may be chargeable.

Site surveys are carried out to assess foundation and tower design, equipment access, power supplies and other services, data and voice communications, buildings and cabins, fire protection, security protection and the like

Ground-based primary and secondary surveillance radars for civilian airports.
Fixed, transportable and mobile primary and secondary air surveillance radars, for defence.
Radars for airport surface movement guidance and control; airport surface detection equipment (ASDE).
Ground-fixed or ground-mobile, or naval, interrogators for Identification Friend or Foe (IFF).
Long-range coastal radar for detection of sea surface targets or for detection of both sea and air targets.
Surveillance radars for the perimeter protection of sensitive installations or borders.