Radar. Radar apparatus. The Air Defence and Air Traffic Systems (ADATS) Delivery Team has a requirement for three geodetic RF transparent radomes to replace those that are approaching their end of life.

The requirement is for the initial two radomes to be delivered by 31.10.2014 with the third to be provided at a later date, anticipated to be 31.3.2015. The existing radomes enclose Air Traffic Management Radar equipment and are fixed to tower platforms with precise interface fixing arrangements. It is imperative that these are replicated in the new radomes.

To prevent the towers being exposed to increased forces the size of the new radomes must not exceed the dimensions of those existing which are for the initial two: external diameter 6,705mm and external height 5,767mm and for the third external diameter 11,783mm and external height 8,839mm. The thickness of the radome is to be minimised and is to be no greater than 40mm.

Each new radome shall be provided with the following features: a zenith hatch, a lightning protection system compliant with BS EN 62305, obstruction lighting compliant with MAA and ICAO standards, an internal lighting and power distribution system and an integral access and fall protection anchor system compliant with BS 7985 and BS EN 795 that will enable safe access to the full external surface of the radome.

The minimum service life of the radomes shall be 20 years during which the Authority would anticipate access to the provision of expert technical and logistics support.