RAF awarded contract to Spanish company Indra last week for one of their Lanza Long Tactical Range 25 radars, max. range ~ 210 to 240nm, to be delivered before year end.
The LTR-25 is a L-band (frequency range of ~1-2GHz with a wavelength range of ~30-15cm) solid-state 3D long range radar, planar array antenna horizontal linear elements vertically stacked, each with its own receiver with ultra low sidelobes, with frequency agility, pulse to pulse, burst to burst and wide operating bandwidth, essential for effective ECCM with an IFF with a 5 to 12 rpm rotating antenna.
Presume a software controlled time shared phased array radar, the main beam can start a track immediately upon detecting a target, since can instantly reposition the beam upon it instead of waiting for the next sweep, the single beam and or limited number being time-shared between the various duties (surveillance, tracking etc.).
(The later newer gen radars are AESA, active electronic-scan arrays, use each of the transmitters a receiver in its own right, essentially an antenna formed by thousands of independent (but co-ordinated) TRMs, transmitter receiver modules, which allows the forming of multiple independent main beams, each assigned to its own task.)
For mission required the LTR-25 adequate and no doubt less costly than latest gen long range radar eg Thales Nederland SMART-L MM, AESA with its powerful GaN TRMs and dual axis multibeam receiver tech, 400km air, 750-1,000km BMD (though mention of 2,000km instrumented range), track up to 2,000 targets.
Guessing Sampson not applicable as out of production and appears no funding to update to GaN TRMs etc