The B-2 was tracked by the Rapier’s IR channel

I cannot recall the year in which the Jernas demonstrated its ability to track the B-2, but remember that it was the year of the aircraft’s first appearance at Farnborough. This was only a flyover – it didn’t land – and the decision to track the bomber seems to have been taken by the crew who were demonstrating the system. (I heard details of the incident from one of the journalists involved.)

The bomber was detected and tracked using the thermal channel – radars on the equipment terrace at Farnborough were not allowed to radiate RF power.
The prominent publication of thermal images of the B-2 by the Flight Show Daily caused much official annoyance, and no further copies of the photo were distributed. – at least in the short term.

Mercurius Cantabrigiensis